Staff Report: Initial Statement of Reasons

for the Proposed Airborne Toxic Control Measure

for Emissions of Chlorinated Toxic Air Contaminants

from Automotive Maintenance and Repair Activities

Stationary Source Division

Emissions Assessment Branch

Release Date:

March 10, 2000

California Environmental Protection Agency

 Air Resources Board
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TITLE 17. CALIFORNIA AIR RESOURCES BOARD

NOTICE OF PUBLIC HEARING TO CONSIDER THE ADOPTION OF

A PROPOSED AIRBORNE TOXIC CONTROL MEASURE FOR

EMISSIONS OF CHLORINATED TOXIC AIR CONTAMINANTS FROM

AUTOMOTIVE MAINTENANCE AND REPAIR ACTIVITIES

The Air Resources Board (the ARB or Board) will conduct a public hearing at the time and place

noted below to consider adopting a regulation to reduce emissions of chlorinated toxic air

contaminants from the use of several automotive consumer products. The proposed regulation is

intended to reduce emissions from cleaning and degreasing products that are predominantly used

in automotive maintenance and repair activities. The proposed regulation would establish

prescriptive standards for these products.

DATE: April 27, 2000

TIME: 9:30 a.m.

PLACE: San Diego County Administration Center

Supervisors Chambers, Room 310

1600 Pacific Highway

San Diego, California

This item will be considered at a two-day meeting of the ARB, which will commence at

9:30 a.m. on April 27, 2000, and may continue at 8:30 a.m., April 28, 2000. This item may not

be considered until April 28, 2000. Please consult the agenda for the meeting, which will be

available at least 10 days before April 27, 2000, to determine the time when this item will be

considered.

This facility is accessible to persons with disabilities. If accommodation is needed, please

contact ARB’s Clerk of the Board by April 13, 2000, at (916) 322-5594, or

TDD (916) 324-9531, or (800) 700-8326 for TDD calls from outside the Sacramento area, to

ensure accommodation.

INFORMATIVE DIGEST OF PROPOSED ACTION AND PLAIN ENGLISH POLICY

STATEMENT OVERVIEW

Sections Affected: Proposed adoption of section 93111, title 17, California Code of Regulations

(CCR), and proposed incorporation by reference of “Air Resources Board Test Method 310,

Determination of Volatile Organic Compounds (VOC) in Consumer Products,” adopted

September 25, 1997 as last amended September 3, 1999.
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Background

The California Toxic Air Contaminant Identification and Control Program (Program),

established under California law by Assembly Bill 1807 (Chapter 1047, Statutes of 1983) and set

forth in Health and Safety Code (HSC) sections 39650 - 39675, requires the ARB to identify and

control air toxics in California. The Board identified methylene chloride (MeCl),

trichloroethylene (TCE), and perchloroethylene (Perc) as toxic air contaminants (TACs) at its

July 1989, October 1990, and October 1991 Board hearings, respectively. Each TAC was

identified without a Board-specified threshold exposure level

Following the identification of a substance as a TAC, HSC section 39665 requires the ARB, with

participation of the air pollution control and air quality management districts, and in consultation

with affected sources and interested parties, to prepare a report on the need and appropriate

degree of regulation for that substance. HSC section 39665(b) requires that this “needs

assessment” address, among other things, the technological feasibility of proposed airborne toxic

control measures (ATCMs) and the availability, suitability and relative efficacy of substitute

products or processes of a less hazardous nature. A needs assessment for Perc was conducted

from 1991 to 1993 as part of the ARB’s development of the ATCM for Emissions of

Perchloroethylene from Dry Cleaning Operations, August 1993 (title 17, California Code of

Regulations, sections 93109 and 93110). The ARB staff has prepared an Initial Statement of

Reasons (ISOR) for this proposed regulation that serves as the report on the need and appropriate

degree of regulation for the two other TACs, MeCl and TCE. 

Once the ARB has evaluated the need and appropriate degree of regulation for a TAC,

HSC section 39666 requires the ARB to adopt regulations (ATCMs) to reduce emissions of the

TAC. Since Perc, MeCl, and TCE do not have Board-specified threshold exposure levels,

HSC section 39666 also requires that the proposed ATCM be designed to reduce emissions to the

lowest level achievable through the application of best available control technology (BACT) or a

more effective control method, in consideration of cost, risk, environmental impacts, and other

specified factors. In developing the proposed ATCM, state law also requires assessment of the

appropriateness of substitute products or processes.

It is important to note that the proposed ATCM is not a consumer products regulation. 

Consumer products regulations are developed under authority granted to the ARB by the

California Clean Air Act (1998), and specifically HSC section 41712. HSC section 41712

requires the ARB to adopt regulations to achieve the maximum feasible reduction in reactive

organic compounds (ROCs) emitted by consumer products (note: ROC is equivalent to VOC). 

As discussed previously, we are proposing this ATCM under the authority granted to the ARB by

Assembly Bill 1807 (The Toxic Air Contaminant Identification and Control Program) as codified

in HSC sections 39650 through 39675. 

However, since the automotive consumer products industry has previously been subject to

regulations developed under ARB’s Consumer Products Program, we have used the phrase
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“consumer products” and definitions similar to those in ARB’s consumer products regulations in

an attempt to make our ISOR more familiar and comprehensible to consumer products

manufacturers, automotive maintenance and repair (AMR) facility operators, and others who may

use these products. 

Description of the Proposed Regulatory Action

The proposed ATCM would minimize emissions of Perc, MeCl, and TCE from AMR activities

by regulating automotive consumer product content and usage. Specifically, the proposed

ATCM requires that brake cleaners, carburetor or fuel-injection air intake cleaners (carburetor

cleaners), engine degreasers, and general purpose degreasers manufactured after

December 31, 2002 and sold or intended for sale in California not contain Perc, MeCl, or TCE. 

The proposed ATCM provides that a product is considered to contain Perc, MeCl, or TCE if it

has one percent or more (by weight) of any one of the three TACs. This allowed content

accounts for the detection limit of the prescribed test method. The proposed ATCM also

prohibits AMR facility owners and operators from using these automotive consumer products if

they contain Perc, MeCl, or TCE in their facilities after June 30, 2005. 

Administrative Requirements

The proposed regulation would provide manufacturers an 18-month sell-through period for the

specified Perc, MeCl, or TCE-containing automotive consumer products manufactured on or

before December 31, 2002. The sell-through period would end June 30, 2004. In addition, AMR

facility owners and operators would be provided 12 months from the end of the sell-through

period to use chlorinated products.

For compliance purposes, manufacturers would be required to display a date or date-code on the

product container indicating date of manufacture and to provide the date-code key to the ARB. 

Variances

The proposed regulation is not expected to cause or result in significant economic hardship to

any person or manufacturer. However, to further reduce this possibility, any person who cannot

comply with the requirements of the proposed ATCM, due to reasons beyond the person’s

reasonable control, may apply in writing for a variance. The proposed variance procedures for

the ATCM closely mirror other ARB variance procedures specified in ARB regulations. 

Test Method

Testing is necessary to determine compliance with the proposed standards. The proposed test

method is a modification of Air Resources Board Test Method 310, Determination of Volatile

Organic Compounds (VOC) in Consumer Products, adopted September 25, 1997, as last

amended September 3, 1999, which is to be incorporated by reference.
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Comparable Federal Regulations

There are no comparable federal regulations covering emissions from the use of automotive

consumer products containing chlorinated toxic air contaminants in automotive maintenance and

repair activities. Staff reviewed federal regulations governing worker safety (the requirements

for cleaning asbestos brakes and the use of aerosol products in the vicinity of ignition sources) to

ensure there were no conflicting provisions.

AVAILABILITY OF DOCUMENTS AND AGENCY CONTACT PERSON

The ARB staff has prepared a Staff Report: Initial Statement of Reasons (ISOR) for the

proposed regulatory action which includes the full text of the proposed regulatory language, a

summary of the environmental and economic impacts of the proposal, and supporting technical

documentation. Copies of the ISOR may be obtained from the ARB’s Public Information Office,

2020 L Street, Sacramento, California 95814, (916) 322-2990, at least 45 days prior to the

scheduled hearing (April 27, 2000). To obtain the ISOR in an alternative format, please contact

the Air Resources Board ADA Coordinator at (916) 322-4505, TDD (916) 324-9531, or

(800) 700-8326 for TDD calls from outside the Sacramento Area. This notice, the ISOR, and all

subsequent regulatory documents are being made available on the ARB Internet site for this

rulemaking, http://www.arb.ca.gov/regact/amr/amr.htm.

The staff has also compiled a record which includes all information upon which the proposal is

based. This material is available for inspection upon request to the contact person identified

below. 

The ARB has determined that it is not feasible to draft the regulation in plain English due to the

technical nature of the regulation; however, a plain English summary of the regulation is

available from the agency contact person named in this notice, and is also contained in the ISOR

for this regulatory action. 

Further inquiries regarding this matter should be directed to the agency contact person for this

rulemaking, Mr. Tony Andreoni, Manager, Process Evaluation Section, Stationary Source

Division, at (916) 324-6021.

COSTS TO PUBLIC AGENCIES AND TO BUSINESSES AND PERSONS AFFECTED

The determinations of the Board’s Executive Officer concerning the cost or savings necessarily

incurred in reasonable compliance with the proposed regulatory action are presented below.

The Executive Officer has determined that the proposed regulatory action will not create costs or

savings, as defined in Government Code section 11346.5(a)(6), to any state agency or in federal

funding to the State, costs or mandate to any local agency or school district whether or not

reimbursable by the State pursuant to Part 7 (commencing with section 17500), Division 4, 

Title 2 of the Government Code, or other nondiscretionary savings to local agencies. However,

the ARB may incur additional implementation or enforcement costs at some future time.
-5-

In developing this regulatory proposal, the ARB staff evaluated the potential economic impacts

on businesses and private persons. The Executive Officer has determined, pursuant to

Government Code section 11346.5(a)(3)(B), that the regulation may affect small business.

However, the Executive Officer has also determined, pursuant to Government Code 

section 11346.5(a)(8), that adoption of the proposed regulatory action will not have a significant

adverse economic impact on businesses, including the ability of California businesses to compete

with businesses in other states.

The Executive Officer has determined that there will be no, or an insignificant, potential cost

impact, as defined in Government Code section 11346.5(a)(9), on private persons or businesses

directly affected resulting from the proposed action.

Finally, in accordance with Government Code section 11346.3, the Executive Officer has

determined that the proposed regulatory action should have negligible impacts on the creation or

elimination of jobs within the State of California, negligible impacts on the creation of new

businesses and the elimination of existing businesses within the State of California, and

negligible impacts on the expansion of businesses currently doing business within the State of

California. A detailed assessment of the economic impacts of the proposed amendments can be

found in the ISOR.

Before taking final action on the proposed regulatory action, the ARB must determine that no

alternative considered by the agency would be more effective in carrying out the purpose for

which the action is proposed or would be as effective and less burdensome to affected private

persons or businesses than the proposed action.

SUBMITTAL OF COMMENTS

The public may present comments relating to this matter orally or in writing at the hearing, and in

writing or by e-mail before the hearing. To be considered by the ARB, written submissions must

be addressed to and received by the Clerk of the Board, Air Resources Board, P.O. Box 2815,

Sacramento, CA 95812, or 2020 L Street, 4th Floor, Sacramento, CA 95814, no later than 12:00

noon Pacific Time April 26, 2000, or received by the Clerk of the Board at the hearing. To be

considered by the ARB, e-mail submissions must be addressed to amr@listserv.arb.ca.gov and

received at the ARB no later than 12:00 noon Pacific Time April 26, 2000.

The ARB requests, but does not require 30 copies of any written submission. Also, the ARB

requests that written and e-mail statements be filed at least 10 days prior to the hearing so that

ARB staff and Board Members have time to fully consider each comment. The ARB encourages

members of the public to bring any suggestions for modification of the proposed regulatory

action to the attention of staff in advance of the hearing.

State of California

AIR RESOURCES BOARD

STAFF REPORT: INITIAL STATEMENT OF REASONS

FOR PROPOSED RULEMAKING

Public Hearing to Consider

PROPOSED ADOPTION OF AN

AIRBORNE TOXIC CONTROL MEASURE

FOR EMISSIONS OF CHLORINATED TOXIC AIR CONTAMINANTS

FROM AUTOMOTIVE MAINTENANCE AND REPAIR ACTIVITIES

To be considered by the Air Resources Board on April 27, 2000, at:

San Diego County Administration Center

Supervisors Chambers, Room 310

1600 Pacific Highway

San Diego, California

Air Resources Board

P.O. Box 2815

Sacramento, CA 95812

This report has been prepared by the staff of the California Air Resources Board. Publication

does not signify that the contents reflect the views and policies of the Air Resources Board, nor

does mention of trade names or commercial products constitute endorsement or recommendation

for use.
State of California

AIR RESOURCES BOARD

PROPOSED AIRBORNE TOXIC CONTROL MEASURE

FOR EMISSIONS OF CHLORINATED TOXIC AIR CONTAMINANTS

FROM AUTOMOTIVE MAINTENANCE AND REPAIR ACTIVITIES

Executive Summary

and

Technical Support Document

Primary Authors

Mark Williams (team lead)

Richard A. Boyd II

Greg Harris

Michele Houghton

Michelle Komlenic

Tina Najjar

Contributing Authors

Vernon Hughes 

Tom Lusk

Reza Mahdavi, Ph.D.

Tony Servin

Hien Tran

Reviewed by:

Tony F. Andreoni, Manager, Process Evaluation Section

Todd S. Wong, Manager, Emissions Evaluation Section

Daniel E. Donohoue, Chief, Emissions Assessment Branch

Donald J. Ames, Assistant Chief, Stationary Source Division

Peter D. Venturini, Chief, Stationary Source Division

February 2000
ACKNOWLEDGMENTS

We wish to acknowledge the participation and assistance of the consumer products

manufacturing industry and its associations, the automotive maintenance and repair industry,

district and state agency staff, and others. We thank the automotive maintenance and repair

facility representatives for showing us their operations and providing product information.

We also wish to acknowledge the technical support we received from the following ARB units:

Field Enforcement Section, Compliance Division

Program Review Section, Compliance Division

Office of Legal Affairs, Executive Office

Evaluation Section, Monitoring and Laboratory Division

Client Support Services Section, Planning and Technical Support Division

Emissions Inventory Methods Section, Planning and Technical Support Division

Emissions Inventory Analysis Section, Planning and Technical Support Division

Modeling Support Section, Planning and Technical Support Division

Implementation Section, Stationary Source Division

Measure Development Section, Stationary Source Division 
Staff Report: Initial Statement of Reasons

for the Proposed Airborne Toxic Control Measure

for Emissions of Chlorinated Toxic Air Contaminants

from Automotive Maintenance and Repair Activities

TABLE OF CONTENTS

Contents Page

Volume I: EXECUTIVE SUMMARY

I. Introduction ............................................................ 1

II. History and Background .................................................. 1

III. Public Outreach ......................................................... 3

IV. Potential Emissions and Health Impacts ...................................... 4

V. Summary of the Proposed Airborne Toxic Control Measure ...................... 6

VI. Potential Health Impacts of the Proposed Airborne Toxic Control Measure .......... 8

VII. Economic Impacts of the Proposed Airborne Toxic Control Measure ............... 9

VIII. Environmental Impacts of the Proposed Airborne Toxic Control Measure .......... 10

IX. Recommendation ....................................................... 13

LIST OF TABLES

Table Title Page

Table 1: Statewide Emission Estimates from Perc-containing Automotive Consumer

Products ......................................................... 4

Table 2: Requirements of the Proposed ATCM .................................. 7
TABLE OF CONTENTS

Contents Page

Volume II: TECHNICAL SUPPORT DOCUMENT

I. Introduction .......................................................... I-1

A. Overview ...................................................... I-1

B. Purpose ........................................................ I-1

C. Regulatory Authority ............................................. I-2

D. Regulatory Activities ............................................. I-3

II. Public Outreach and Report Preparation .................................... II-1

A. Outreach Efforts ................................................. II-1

B. Public Involvement .............................................. II-1

C. Data Collection Tools to Assist in Report Preparation ................... II-3

III. Physical Characteristics, Sources, and Ambient Concentrations of Perchloroethylene,

Methylene Chloride, and Trichloroethylene ................................ III-1

A. Perchloroethylene ............................................... III-1

B. Methylene Chloride ............................................. III-7

C. Trichloroethylene .............................................. III-12

IV. Summary of Automotive Maintenance and Repair Activities ................... IV-1

A. Description of Product Categories .................................. IV-1

B. Users of Automotive Consumer Products in California ................. IV-4

C. How Brake Service and Repair Jobs are Performed .................... IV-4

V. Emissions From Automotive Maintenance and Repair Activities ................ V-1

A. Brake Cleaner and Perc-Containing Automotive Products Survey ......... V-1

B. Automotive Service Facility Questionnaire ........................... V-2

C. Brake/Automotive Repair Shop Survey .............................. V-8

D. Summary of Emissions ......................................... V-14

VI. Potential Health Impacts of Perchloroethylene, Methylene Chloride, and 

Trichloroethylene from Automotive Maintenance and Repair Activities .......... VI-1

A. An Overview of Health Risk Assessment ............................ VI-1

B. The Tools Used for this Risk Assessment ............................ VI-3

C. Potential Health Effects of Perchloroethylene, Methylene Chloride, and 

Trichloroethylene ............................................... VI-5

D. Factors that Affect the Outcome of a Health Risk Assessment at

Automotive Maintenance and Repair Facilities ........................ VI-9

E. Summary of Potential Health Impacts from Automotive Maintenance 

and Repair Facilities ........................................... VI-11

F. Multipathway Health Risk Assessment ............................. VI-45
TABLE OF CONTENTS (continued)

Contents Page

VII. The Proposed Control Measure and Alternatives ........................... VII-1

A. The Proposed Control Measure ................................... VII-1

B. Basis for the Proposed Regulation ................................. VII-2

C. Alternatives to the Proposed Control Measure ....................... VII-6

D. Evaluation of the Proposed Control Measure ....................... VII-10

VIII. Potential Health Impacts of the Proposed Airborne Toxic Control Measure ...... VIII-1

A. Statewide Emissions and Risk Reduction Benefits of the Airborne

Toxic Control Measure ......................................... VIII-1

B. Potential Adverse Health Effects from Use of Volatile Organic 

 Compounds .................................................. VIII-1

C. Replacement with Other Toxic Air Contaminants that are Not

Volatile Organic Compounds .................................... VIII-4

D. Replacement with Compounds that are Not Toxic Air Contaminants

or Volatile Organic Compounds .................................. VIII-5

E. Workplace Exposure ........................................... VIII-5

IX. Economic Impacts of the Proposed Airborne Toxic Control Measure ............ IX-1

A. Summary of Economic Impacts .................................... IX-1

B. Economic Impacts Analysis on California Businesses as Required by 

The California Administrative Procedure Act ......................... IX-3

C. Analysis of Potential Impacts to California State or Local Agencies ....... IX-9

D. Analysis of the Cost-Effectiveness of the Proposed ATCM .............. IX-9

X. Environmental Impacts of the Proposed Airborne Toxic Control Measure ........ X-1

A. Legal Requirements Applicable to the Analysis ....................... X-1

B. Potential Waste Water Impacts .................................... X-1

C. Potential Hazardous Waste Impacts ................................. X-2

D. Potential Air Pollution Impacts .................................... X-3

E. Formation of Phosgene .......................................... X-6

F. Potential Flammability of Products that Contain VOCs ................. X-7

G. Reasonably Foreseeable Feasible Mitigation Measures .................. X-8

H. Reasonably Foreseeable Alternative Means of Compliance with the ATCM . X-8

XI. References
TABLE OF CONTENTS (continued)

APPENDIX A: Proposed Regulation Order: Airborne Toxic Control Measure for

Emissions of Chlorinated Toxic Air Contaminants From Automotive

Maintenance and Repair Activities

APPENDIX B: Surveys

APPENDIX C: Methodology for Estimating the Potential Health Impacts from

Automotive Maintenance and Repair Facilities

APPENDIX D: Specific and Generic Facility Modeling Results

APPENDIX E: Statewide Population Exposure Estimate Modeling Memorandums

APPENDIX F: Selection of Specific and Generic Facilities for ISCST3 Modeling

APPENDIX G: Compounds in Products

APPENDIX H: Examples of Manufacturer Efficacy Claims for Non-Chlorinated Products

APPENDIX I: Glossary
LIST OF TABLES

Table Title Page

Table V-1: Summary of Manufacturer Survey Information ........................ V-2

Table V-2: Number of Businesses by SIC Code ................................ V-3

Table V-3: Brake Cleaning Techniques Used in Facility Survey .................... V-4

Table V-4: Product Formulations Used in Facility Survey ........................ V-4

Table V-5: Aerosol and Bulk Product Usage for Surveyed Facilities ................ V-5

Table V-6: Proportion of Products that Contain Perc ............................ V-6

Table V-7: Proportion of Facility Survey Entries that Contain Perc ................. V-6

Table V-8: Proportion of Manufacturer Survey Entries that Contain Perc ............ V-6

Table V-9: Total Perc Usage ............................................... V-8

Table V-10: Product Formulations Used in Site Visit Facilities ..................... V-9

Table V-11: Use of Portable Brake Cleaning Units in Site Visit Facilities ............ V-10

Table V-12: Summary of Source Characteristics ................................ V-11

Table V-13: Number of Site Visit Facilities with Receptors at Various Distances ...... V-12

Table V-14: Description of Automotive Maintenance and Repair Facility Categories ... V-13

Table V-15: Emission Estimates for Site Visits by Facility Category ................ V-14

Table V-16: Total Emissions of Perc, MeCl, and TCE Estimated from Site Visits ..... V-14

Table V-17: Estimated Maximum Emissions from the Facility Survey .............. V-15

Table V-18: Statewide Emission Estimates from Automotive Consumer Products ..... V-15

Table VI-1: Pollutant-Specific Health Effects Values Used for Determining 

Potential Health Impacts ......................................... VI-4

Table VI-2: Overview of the Potential Health Impacts for the Fifty-Four

Specific Facilities .............................................. VI-14

Table VI-3: Summary of the Specific Facility Near-Source Potential Health Impacts ... VI-16

Table VI-4: Summary of the Potential Health Impacts at the Maximum Exposed

Individual Resident from the Specific Facilities ...................... VI-19

Table VI-5: Summary of the Potential Health Impacts at the Maximum Exposed

Individual Worker from the Specific Facilities ....................... VI-22

Table VI-6: Summary of the Potential Regional Population and Individual 

Cancer Risk for the Thirteen Specific Facilities Modeled with ISCST3 .... VI-26

Table VI-7: Overview of the Potential Health Impacts for the Three Generic

Facilities Using Off-site Representative Meteorology .................. VI-28

Table VI-8: Overview of the Potential Health Impacts for the Three 

Generic Facilities Using Default Meteorology ....................... VI-29

Table VI-9: Summary of the Potential Health Impacts at Various Distances for Three

Generic Facilities Using Four Different Brake Product Formulations and

Four Product Categories at the Meteorological Site Yielding the Highest

Concentrations (Anaheim) ....................................... VI-32
LIST OF TABLES (continued)

Table Title Page

Table VI-10: Summary of the Potential Health Impacts at Various Distances for Three

Generic Facilities Using Four Different Brake Product Formulations and

Four Product Categories at the Meteorological Site Yielding the Middle 

Range Concentrations (Burbank) .................................. VI-34

Table VI-11: Summary of the Potential Health Impacts at Various Distances for Three

Generic Facilities Using Four Different Brake Product Formulations and

Four Product Categories at the Meteorological Site Yielding the Lowest

Concentrations (Oakland) ....................................... VI-36

Table VI-12: Summary of the Potential Health Impacts at Various Distances for Three

Generic Facilities Using Four Different Brake Product Formulations and

Four Product Categories based on Default Meteorological Data .......... VI-38

Table VI-13: Summary of the Potential Health Impacts at Various Distances for Three

Generic Facilities Using Carburetor Cleaner, Engine Degreaser, and 

General Degreaser, based on Average Meteorological Data ............. VI-40

Table VI-14: Summary of the Potential Health Impacts at Various Distances for Three

Generic Facilities Using Carburetor Cleaner, Engine Degreaser, and 

General Degreaser, based on Default Meteorological Data .............. VI-41

Table VI-15: Air Basin Population-Weighted Perchloroethylene Exposure 

based on 1990 Census .......................................... VI-42

Table VI-16: Estimated Statewide Population-Weighted Perchloroethylene Exposure ... VI-43

Table VI-17: Statewide Average Concentrations for MeCl and TCE ................. VI-43

Table VI-18: Estimated Potential Reductions in Ambient Levels of Perc,

MeCl, and TCE from the Proposed ATCM .......................... VI-44

Table VII-1: Facility Survey Summary of Chlorinated and Non-chlorinated 

Product Usage ................................................ VII-3

Table VII-2: BACT Product Content Limits ................................... VII-6

Table VIII-1: Potential TCE and MeCl Emissions After Removal of Perc from

Aerosol Brake Cleaners ......................................... VIII-3

Table VIII-2: Potential MeCl and TCE Emissions After Removal of Perc from

Aerosol Brake Cleaners ......................................... VIII-5

Table IX-1: Number of Chlorinated TAC and VOC Products Marketed in California ... IX-4

Table IX-2: Affected Product Categories ...................................... IX-5

Table IX-3: Changes in Return on Owner’s Equity for Typical Businesses in 

Automotive Consumer Products Industry ............................ IX-6

Table IX-4: Estimated Total Annualized Non-Recurring Fixed Cost to 

Comply with the Proposed ATCM ................................ IX-15

Table IX-5: Annual Recurring Cost Calculations for Raw Materials ................ IX-17

Table IX-6: Estimated Impact to Raw Materials Cost Per Unit .................... IX-19
LIST OF TABLES (continued)

Table Title Page

Table IX-7: Comparison of Raw Materials Cost Impacts for the Proposed ATCM

and ARB Consumer Product Regulations ........................... IX-19

Table IX-8: Estimated Per-Unit Cost Increases from Both Annualized 

Non-Recurring and Annual Recurring Costs ......................... IX-21

Table IX-9: Estimated Cost-Effectiveness for Proposed ATCM ................... IX-22

Table IX-10: Comparison of Cost-Effectiveness ................................ IX-23

Table IX-11: Estimated Cost-Effectiveness for Proposed ATCM ................... IX-24

Table IX-12: Comparison of Cost-Effectiveness for Proposed ATCM and 

Other ARB Control Measures .................................... IX-25

Table X-1: Statewide Emissions of Perc, MeCl, and TCE from Automotive Consumer

Products ...................................................... X-3

Table X-2: Potential Maximum Increase in VOC Emissions from a Switch to 

VOC-Based Non-Chlorinated Products .............................. X-4

Table X-3: Approximate Emission Reductions from Proposed ATCM and October 1999 

Consumer Products Amendments .................................. X-4
State of California

AIR RESOURCES BOARD

Staff Report: Initial Statement of Reasons

for the Proposed Airborne Toxic Control Measure

for Emissions of Chlorinated Toxic Air Contaminants

from Automotive Maintenance and Repair Activities

Volume I:

Executive Summary
1

I. INTRODUCTION

This executive summary presents the Air Resources Board (ARB or Board) staff’s

Proposed Airborne Toxic Control Measure (ATCM) for Emissions of Chlorinated Toxic Air

Contaminants from Automotive Maintenance and Repair Activities. The proposed control

measure addresses emissions of three toxic air contaminants (TACs): perchloroethylene (Perc),

methylene chloride (MeCl), and trichloroethylene (TCE). These TACs are found in automotive

consumer products commonly used in automotive maintenance and repair (AMR) activities. 

Automotive consumer products are aerosol and liquid products that remove grease, grime, and

dirt from a variety of automobile parts. They are generally available as pre-packaged aerosol

sprays or bulk liquid products that are easily added to refillable pump sprayers. Examples of

applications where these products are used include engine degreasing, the servicing of

carburetors and throttle bodies, and brake service and repair operations. The majority of these

products are used in commercial AMR facilities with much smaller usage from do-it-yourself

enthusiasts.

This summary is based upon the Technical Support Document (TSD) found in Volume II

of this Initial Statement of Reasons (ISOR). The TSD provides a more detailed presentation of

the technical basis and supporting analyses for the proposed control measure.

II. HISTORY AND BACKGROUND

1. Why did we perform this assessment?

At its November 21, 1996, hearing, the Board adopted amendments to exempt Perc from

the volatile organic compound (VOC) definition in California’s Regulation for Reducing VOC

Emissions from Consumer Products (Consumer Products Regulation; section 94521, title 17,

California Code of Regulations). This action allowed manufacturers to reformulate consumer

products with Perc to meet the VOC limits of the Consumer Products Regulation. 

During the hearing, the Board expressed concerns about the potential for an increase in

the use of Perc in consumer products, and the possible health impacts that might result. 

Therefore, the Board directed the ARB staff to conduct an assessment under the State’s TAC

control program of the need to control Perc use in these products. Staff initially focused on the

use of Perc in brake cleaning products because this product category represented the greatest use

of Perc among the various products. The preliminary results of this initial assessment were

discussed in the Perchloroethylene Needs Assessment for Automotive Consumer Products:

Status Report released in June 1997 (June 1997 Status Report) and presented to the Board at its

June 26, 1997, meeting. An additional update on the assessment, incorporating additional data

and analyses, was provided to the Board in a May 1998 Memorandum. These documents

indicated that, based on the available information, an ATCM should be developed to reduce Perc

emissions from brake cleaning products. 
2

The assessment was later expanded to address the use of MeCl and TCE in brake

cleaning products, and the use of all three compounds in carburetor or fuel-injection air intake

cleaners (carburetor cleaners), engine degreasers, and general purpose degreasers. This

expansion was based on information and observations during site visits indicating that: (1) brake

cleaning products could potentially be reformulated with MeCl or TCE, and (2) carburetor

cleaners, engine degreasers, and general purpose degreasers could be used interchangeably with

or substituted for brake cleaning products.

2. What authority does the Air Resources Board have to control emissions of TACs?

This control measure is developed under the authority of the California Toxic Air

Contaminant Identification and Control Program (Air Toxics Program), established under

California law by Assembly Bill 1807 and set forth in Health and Safety Code (HSC) sections

39650 thru 39675. The Board identified MeCl, TCE, and Perc as TACs and potential human

carcinogens at its July 1989, October 1990, and October 1991 Board hearings, respectively. In

each case, the Board determined there was not sufficient available scientific evidence to identify

a threshold level of exposure below which no adverse health effects are likely to occur.

Following the identification of a substance as a TAC, HSC section 39665 requires the

ARB, with participation of the air pollution control and air quality management districts

(districts), and in consultation with affected sources and interested parties, to prepare a report on

the need and appropriate degree of regulation for that substance. A needs assessment for Perc

was conducted from 1991 to 1993 as part of the ARB’s development of the Airborne Toxic

Control Measure (ATCM) for Emissions of Perchloroethylene from Dry Cleaning Operations

(Dry Cleaning ATCM), August 1993 (title 17, CCR, sections 93109 and 93110). During that

assessment, the ARB staff determined that dry cleaning operations and solvent degreasing

operations accounted for about 80 percent of the Perc use in California. Therefore, staff focused

their attention on dry cleaning and degreasing uses of Perc first and is now addressing other uses

of Perc. Additionally, Volume II of this ISOR serves as the report on the need and appropriate

degree of regulation for MeCl and TCE. Once the ARB has evaluated the need and appropriate

degree of regulation for a TAC, HSC section 39666 requires the ARB to adopt ATCMs to reduce

emissions of that TAC. When adopting ATCMs, HSC section 39666 requires that any control

measure for a TAC without a Board-specified threshold level be designed to reduce emissions to

the lowest level achievable through the application of best available control technology (BACT)

or a more effective control method.

3. Is the proposed ATCM a Consumer Products Regulation?

It is important to note that the proposed ATCM is not a consumer products regulation. 

Consumer products regulations are developed under authority granted to the ARB by the

California Clean Air Act (1998), and specifically HSC section 41712. HSC section 41712

requires the ARB to adopt regulations to achieve the maximum feasible reduction in reactive

organic compounds (ROCs) emitted by consumer products (note: ROC is equivalent to VOC). 
3

As discussed previously, we are proposing this ATCM under the authority granted to the ARB by

Assembly Bill 1807 (the Toxic Air Contaminant Identification and Control Program) as codified

in HSC sections 39650 through 39675. 

However, since the automotive consumer products industry has previously been subject to

regulations developed under ARB’s Consumer Products Program, we have used the phrase

“consumer products” and definitions similar to those in ARB’s consumer products regulations in

an attempt to make our ISOR more familiar and comprehensible to consumer products

manufacturers, AMR facility operators, and others who may use these products. 

III. PUBLIC OUTREACH

For this assessment, we developed an extensive outreach program that involved

automotive consumer products manufacturers and their associations, AMR facility operators and

their associations, national, state and local regulatory agencies, environmental/pollution

prevention and public health advocates, and other interested parties. These entities participated

in the development and review of the necessary surveys and draft reports, conference calls,

working group meetings, and workshops. Outreach efforts also provided participants a forum in

which to address their concerns. ARB outreach activities included:

C the establishment of the Perc Needs Assessment working group;

C eight meetings, four workshops, and seven conference calls;

C more than 500 telephone conversations with the working group and facility operators;

C mailing or faxing working group agendas, minutes, draft surveys, survey analyses, draft

and final status reports to over 80 people;

C mailing workshop notices to over 6,000 people;

C mailing the Brake Cleaner and Perc-Containing Automotive Products Survey to

37 manufacturers and 23 other interested parties (including associations);

C mailing the Automotive Repair Facility Survey to 25,000 facilities;

C visiting a total of 158 AMR facilities to gather information on: (1) the amount of product

used for brake service and repair, building dimensions, and receptor locations;

(2) aqueous brake cleaning units; and (3) flammability issues; 

C meeting with the Sacramento Valley Fire Marshals Association to discuss flammability

issues;

C reviewing information provided to us by the sanitation districts on increasing

concentrations of Perc in the influent to publicly owned treatment works (POTWs). 

Additionally, a representative of the County Sanitation Districts of Los Angeles County

presented this information during the May 1999 and January 2000 workshops; and,

C participating with the Institute for Research and Technical Assistance (IRTA) on visits to

Los Angeles area AMR facilities conducting brake service and repair operations. These

facilities were participants in a study of alternative brake cleaning products and the visits 
4

provided technical information on the availability, cleaning effectiveness, and relative

cost of non-aerosol brake cleaning products.

IV. POTENTIAL EMISSIONS AND HEALTH IMPACTS

1. How much Perc, MeCl, and TCE is emitted from AMR Activities?

Automotive consumer products are used in a variety of applications and industries

throughout California. They are most commonly used in AMR activities at approximately

25,000 AMR facilities in California (AMR facilities include service stations, fleets, general

automotive repair shops, dedicated brake repair shops, and new and used car dealerships). 

Although brake repair and engine degreasing are common do-it-yourself activities, the vast

majority of Californians look to AMR facilities for their maintenance and repair needs. In these

facilities, automotive consumer products are used to remove grease, grime, and dirt from a

variety of automobile parts. Examples of applications include engine degreasing, the servicing of

carburetors and throttle bodies, and brake service and repair operations. These commercial

facilities use both aerosol and liquid products (chlorinated and non-chlorinated) contained in a

variety of delivery mechanisms.

Emissions of Perc, MeCl, and TCE from these products were estimated based on

information collected from surveys and site visits to AMR facilities. The surveys conducted

included the Brake Cleaner and Perc-Containing Automotive Products (Manufacturer) Survey,

the Automotive Service Facility Questionnaire (Facility Survey), and the 1997 Commercial and

Consumer Products (Consumer Products) Survey. Additional information was collected from

158 site visits to AMR facilities. Based on the survey data, over 8 million brake service and

repair operations (brake jobs) are performed in California each year. Table 1 summarizes the

estimated statewide emissions of Perc, MeCl, and TCE from the four automotive consumer

product categories.

Table 1. Statewide Emission Estimates from

Automotive Consumer Products1

Compound Emissions [tons/day]

Perc 4.2

MeCl 0.7

TCE 0.3

Total 5.2

 1. Source: 1997 Consumer and Commercial Products Survey.
5

2. What are the potential health effects associated with exposure to Perc, MeCl, and TCE?

Exposure to Perc, MeCl, or TCE may result in both cancer and non-cancer (acute and

chronic) health effects to off-site receptors and on-site workers. The primary route of human

exposure for these compounds is inhalation. Non-cancer effects from exposure to Perc include

headache, dizziness, rapid heartbeat, and liver and kidney damage. Non-cancer effects from

exposure to MeCl include cardiac arrhythmia and loss of consciousness. Non-cancer effects

from exposure to TCE include headache, nausea, tremors, and respiratory irritation. These

health effects may also result from exposures that occur within the workplace for all three

compounds. A more detailed discussion of health effects is presented in Chapter VI of the TSD.

3. How were the potential health impacts from AMR facilities assessed?

Air dispersion models and pollutant-specific health effects values were used to estimate

the potential health impacts from AMR facilities. Information required for the air dispersion

model includes emission estimates, physical descriptions of the source, and emission release

parameters. Combining estimated concentrations from the air dispersion model with the

pollutant-specific health values provides an estimate of the off-site potential cancer and

non-cancer health impacts from the emissions of a TAC. The risk assessment methodologies

used in assessing potential health impacts were consistent with the California Air Pollution

Control Officers Association (CAPCOA) risk assessment guidelines. Additionally, the

pollutant-specific health effects values have been approved by the ARB and the Office of

Environmental Health Hazard Assessment (OEHHA) and the air dispersion models have been

approved by the United States Environmental Protection Agency (U.S. EPA). Furthermore, the

air dispersion models have been recommended by ARB for use in risk assessments. Health

effects values are summarized in Chapter VI of the TSD.

4. What are the potential health impacts to individuals from exposure to AMR activities

using products containing Perc, MeCl, or TCE?

To assess potential health impacts, ARB staff conducted individual health risk

assessments for 54 specific AMR facilities and three generic facilities. These specific and

generic facilities represent a broad range of AMR facilities and allow for the reasonable

approximation of potential health impacts statewide. The risk assessments were based on

Perc-containing brake cleaners using source characteristic information collected during the site

visits. Forty-one of the specific facilities were modeled using a screening air dispersion model

and the remaining 13 specific facilities were evaluated using a refined air dispersion model. 

Potential cancer risk in the screening assessments were as high as 50 chances in a million at the

near-source location (a near-source location is defined as a minimum modeled distance of

20 meters from the center of the facility) and as high as 60 chances in a million with the refined

model. Potential non-cancer acute and chronic hazard indices were both less than one. 

Generally, hazard indices less than one are not considered to be a concern to public health.
6

The generic facility analysis was developed to estimate potential health impacts at a

variety of facilities. Potential cancer risk at the generic facilities was as high as 110 chances per

million at the near-source location. The modeling results and hazard index estimates show that it

is unlikely for significant acute or chronic off-site non-cancer health effects to result from the

emissions of Perc-based brake cleaners. Both the chronic and acute hazard indices are less than

one at the minimum modeled distance. As previously mentioned, hazard indices less than one

are not considered to be a concern to public health.

Additional modeling analyses performed for brake cleaners formulated to contain MeCl

and/or TCE, and for carburetor cleaners, engine degreasers, and general purpose degreasers

formulated to contain Perc, MeCl, or TCE indicates that these products would also pose potential

adverse health impacts. A more detailed discussion of health impacts is presented in Chapter VI

of the TSD.

V. SUMMARY OF THE PROPOSED AIRBORNE TOXIC CONTROL MEASURE

1. What would the proposed ATCM require?

The proposed ATCM requires that automotive consumer products (aerosol and liquid

brake cleaners, carburetor cleaners, engine degreasers, and general purpose degreasers)

manufactured after December 31, 2002 for sale or use in California not to contain Perc, MeCl, or

TCE. It would also require that automotive consumer products manufactured on or before

December 31, 2002 not be sold in California after June 30, 2004 if they contain Perc, MeCl, or

TCE. The proposed ATCM accounts for the detection limits of the prescribed test method by

providing that a product is considered to contain Perc, MeCl, or TCE if it has one percent or

more (by weight) of any of the three compounds Perc, MeCl, or TCE (either alone or in

combination). This provision also addresses the issue of inadvertent contamination that may

occur when manufacturers convert a production line from one product formulation to another. 

Table 2 summarizes the requirements of the proposed ATCM.
7

Table 2. Requirements of the Proposed ATCM

Applicability Exemptions Requirements

Applies to any person who sells,

supplies, offers for sale, or

manufactures automotive consumer

products (aerosol and liquid brake

cleaners, carburetor cleaners,

engine degreasers, and general

purpose degreasers) for use in

California.

Applies to the owner or operator of

any AMR facility that uses

automotive consumer products in

California.

Does not apply to any automotive

consumer product manufactured in

California for shipment and use

outside of California.

Does not apply to any manufacturer

or distributor who sells, supplies, or

offers for sale an automotive

consumer product intended for

shipment and use outside of

California.

Effective December 31, 2002:

Automotive consumer products

manufactured after this date for sale

or use in California cannot contain

Perc, MeCl, or TCE.

Effective June 30, 2004:

After this date, automotive

consumer products manufactured

on or before December 31, 2002

that contain Perc, MeCl, or TCE

can not be sold or distributed for

use in California.

Effective June 30, 2005:

After this date, AMR facilities can

not use automotive consumer

products that contain Perc, MeCl,

or TCE.

2. What is the basis for the proposed ATCM?

The proposed ATCM is based on staff’s evaluation of best available control technology

(BACT), in consideration of alternative products and processes. In evaluating BACT,

information from surveys, site visits, third-party studies, and brake parts manufacturers was

analyzed to determine that:

C brake cleaners, carburetor cleaners, engine degreasers, and general purpose degreasers are

often used interchangeably;

C Perc, MeCl, and TCE are suitable and readily available replacements for each other;

C the removal of Perc alone could result in significantly increased emissions of MeCl and

TCE with an associated increase in exposure to these TACs;

C non-chlorinated products are currently used at nearly two-thirds of AMR facilities;

C alternative products that use non-chlorinated formulations and alternative processes such

as aqueous-based portable brake cleaning units and parts washers are currently in use

(62 to 90 percent of automotive consumer products are non-chlorinated and 60 percent of

AMR facilities use aqueous-based processes); 

C most manufacturers market both chlorinated and non-chlorinated aerosol and bulk liquid

products and claim that both are suitable and effective;
8

C alternative products and processes are effective in cleaning and degreasing based on

claims that manufacturers make on the product labels of non-chlorinated products and on

their websites;

C a recently conducted study for the U.S. EPA demonstrated that aqueous-based portable

brake cleaning units are effective and less costly than chlorinated products; 

C based on the Facility Survey, brake jobs performed with VOCs used less product than

brake jobs performed with Perc, MeCl, or TCE; and,

C discussions with a variety of facility operators and mechanics indicate that alternative

products, including non-chlorinated aerosols and bulk liquids, are suitable and effective

cleaning products.

As a result, staff considers the proposed ATCM to be technically feasible, providing facility

operators and other users with safe, effective, and less-hazardous products.

3. What alternatives to the proposed ATCM did staff consider?

HSC section 39665 requires the ARB to consider and evaluate alternatives to the proposed

ATCM. Staff identified three alternatives to the proposed control measure: workplace practices,

a chlorinated compound limit, and a chlorinated compound phase-out. Each of the three

alternatives were evaluated addressing applicability, effectiveness, enforceability, and

cost/resource requirements. We determined that these alternatives would not be as effective at

reducing emissions of and exposure to Perc, MeCl, and TCE from AMR activities as the proposed

control measure. Furthermore, the three alternatives did not meet the HSC section 39666 criterion

to reduce emissions to the lowest level achievable through the application of BACT in

consideration of cost, risk, and environmental impacts.

VI. POTENTIAL HEALTH IMPACTS OF THE PROPOSED AIRBORNE TOXIC

CONTROL MEASURE

1. How would the proposed ATCM reduce the risk to public health?

The proposed ATCM removes Perc, MeCl, and TCE from automotive consumer products. 

As a result, the emission and health impact (i.e., potential cancer risk) reduction benefits are

nearly 100 percent. Potential cancer risk from AMR facilities that use automotive consumer

products that contain Perc, MeCl, or TCE will be reduced to essentially zero.

2. What are the potential adverse health impacts from an increased use of VOCs and other

TACs?

With the removal of Perc, MeCl, and TCE, we expect that many users will look to

VOC-based automotive consumer products, thereby increasing the use of VOCs. Appendix G of

the TSD contains a listing of the compounds used these products based on the Facility Survey. 
9

No adverse health impacts from the compounds on this list (other than Perc, MeCl, and TCE) are

expected. The apparent use of benzene (which is a TAC as well as a VOC) was a concern for

staff; however, upon further investigation, staff learned that it was only used by one manufacturer

(in one product) at concentrations less than two percent. Staff intends to monitor the usage of

other TACs and will propose amendments to the ATCM if appropriate. Additionally,

manufacturers will be advised to not use identified TACs in their product formulations.

3. How would the proposed ATCM affect workplace exposure to Perc, MeCl, and TCE?

The proposed ATCM will remove Perc, MeCl, and TCE from automotive consumer

products. As a result, worker exposure from products that contain these compounds will be

eliminated.

VII. ECONOMIC IMPACTS OF THE PROPOSED AIRBORNE TOXIC CONTROL

MEASURE

1. What are the expected economic impacts of the proposed ATCM on businesses?

No significant economic impacts are expected from the proposed ATCM. Automotive

consumer products are manufactured or marketed by 60 companies nationwide, with ten based in

California. The California-based companies account for nine percent of chlorinated TAC and

VOC products manufactured or marketed in the State. Most manufacturers already have at least

one non-chlorinated VOC product on the market that meets the requirements of the proposed

ATCM, and, therefore, are not expected to incur additional costs. Those companies that do not

currently have non-chlorinated VOC products and choose to formulate one are expected to be able

to absorb the cost of reformulation with no adverse impacts on their profitability. 

The analysis has shown that the raw materials costs for chlorinated TAC products are

greater than the raw materials costs for VOC products. As a result, it should be less costly to

manufacture non-chlorinated VOC products as opposed to products that contain Perc, MeCl, or

TCE. However, there are no noticeable differences between the market prices for chlorinated

TAC and VOC products. Therefore, no economic impact on the consumer is expected. 

The proposed ATCM will primarily impact manufacturers and marketers (companies

which outsource the manufacturing of their products). As a result, we do not expect a noticeable

change in employment; business creation, elimination or expansion; and business competitiveness

in California.

2. Will the proposed amendments be cost-effective?

Based on our analyses, we estimate that the cost-effectiveness of the proposed ATCM

ranges from essentially no cost to a high of about $0.23 per pound of Perc, MeCl, and TCE
10

reduced. The estimated average cost-effectiveness weighted by emissions reductions across all

categories is about $0.03 per pound of Perc, MeCl, and TCE reduced. To evaluate the relative

impact and effectiveness of the proposed ATCM based on health impact reduction benefits, we

calculated the cost per cancer case avoided. The estimated average cost-effectiveness per cancer

case avoided is $26,000 with a range of approximately $1,400 to $111,000. The ranges for pound

of TAC reduced and cancer cases avoided are significantly less than previously approved ATCMs. 

In previously approved ATCMs, these amounts have generally fallen within an overall range of

$0.64 to $1.77 (adjusted to 1999 dollars) per pound of Perc reduced (1993 Perchloroethylene Dry

Cleaning Operations ATCM, title 17, CCR, section 93109) and $6,600 to $18.6 million (adjusted

to 1999 dollars) per cancer case avoided (1992 Non-Ferrous Metal Melting ATCM, title 17, CCR,

section 93107).

3. Will consumers have to pay more for consumer products subject to the proposed ATCM?

Consumers may have to pay more for some products subject to the proposed ATCM,

depending on the extent to which manufacturers are able to pass along their costs to consumers. If

all the costs of the proposed ATCM are passed along to consumers, the change in cost per unit

would range from no cost to a cost increase of $0.09 per unit, depending on the product category. 

The average cost per unit, is estimated to be about $0.02. For comparison purposes, this is the

same unit sales-weighted average cost increase that was estimated for the October 1999

amendments to the Consumer Products Regulation.

VIII. ENVIRONMENTAL IMPACTS OF THE PROPOSED AIRBORNE TOXIC

CONTROL MEASURE

1. What are the expected environmental benefits of the proposed ATCM?

The main environmental benefit of the proposed ATCM is the reduction of 5.2 tons per

day (tpd) of Perc, MeCl, and TCE emissions in California. Approximately 2.6 tpd of this

reduction is expected to occur in the South Coast Air Basin. The proposed ATCM will also affect

(positively) wastewater treatment, hazardous waste disposal as well as reduce the potential for the

formation of phosgene, thereby extending a greater level of worker and public health protection

from these areas. 

Currently, many wastewater treatment plants do not have the equipment necessary to

process industrial wastes such as chlorinated solvents. These solvents have been detected at

elevated levels at these same plants and have been linked to increased influent concentrations of

Perc at four wastewater treatment plants. The influent concentrations of Perc have been high

enough to potentially cause violations of the plants’ discharge limit of 5 micrograms per liter

(μg/L).
11

Chlorinated automotive consumer products are generally classified as hazardous waste

because they contain substances which are listed as toxic substances. Spent baths (as well as

other waste disposal containers) contaminated with chlorinated compounds are typically more

costly to have removed from the facility and typically do not meet discharge standards set by

publicly-owned treatment works (POTWs) and sanitation districts.

The removal of Perc, MeCl, and TCE from these products should lead to a reduction in the

amount of chlorinated solvents reaching the storm drains and the wastewater treatment plants. It

will also minimize the possibility of chlorinated solvents contaminating aqueous baths, waste oil

containers, and hazardous waste disposal drums thereby significantly reducing hazardous waste

contamination and disposal costs. Additionally, the proposed ATCM is expected to have a

negligible impact on global warming, will reduce workplace exposure from emissions of Perc,

MeCl, and TCE, and will minimize the potential for phosgene formation (more information on

these benefits can be found in Chapter X of the TSD).

2. Are there any potential negative environmental impacts?

The October 1999 amendments to the Consumer Products Regulation are expected to

obtain a reduction of approximately 3.3 tpd in VOC emissions from automotive consumer

products. However, the removal of Perc, MeCl, and TCE as formulation options in the proposed

ATCM will adversely impact the reduction in VOC emissions that otherwise would have been

realized. The removal of Perc, MeCl, and TCE will reduce emissions of these TACs by

approximately 5.2 tpd. If we assume a worse case scenario where all current users of chlorinated

products switch to non-chlorinated, VOC-based products with Perc, MeCl, and TCE replaced with

VOC compounds (irrespective of any current VOC-based formulation limits), then the theoretical

increase in statewide VOC emissions would be approximately 5.2 tpd. However, beginning

January 1, 2002, the VOC-content of automotive consumer products is subject to VOC-content

limits as specified in the October 1999 amendments to the Consumer Products Regulation. As a

result of these technically-feasible limits, post-ATCM VOC emissions would increase by no more

than 2.3 tpd statewide. However, ARB staff expects that some users of chlorinated automotive

consumer products will choose to consider other non-chlorinated alternatives (such as

aqueous-based portable brake cleaning units and parts washers) and not switch exclusively to

non-chlorinated VOC products. If this occurs, the increase in VOC emissions related to the

proposed ATCM would be less than 2.3 tpd statewide. When total VOC emission reductions

from both the October 1999 amendments to the Consumer Products Regulation and the proposed

ATCM are considered, statewide VOC emissions from the four automotive consumer product

categories will be reduced by at least one ton per day.

3. What are the impacts on the State Implementation Plan (SIP) for Ozone?

The proposed ATCM decreases the potential VOC reductions that will be obtained by the

October 1999 amendments to the Consumer Products Regulation while achieving substantial

reductions in emissions of chlorinated TACs. Perc was considered a VOC in the 1994 ozone SIP
12

inventory; therefore, substituting non-chlorinated VOC-based products to replace Perc will have

no impact on the 1994 SIP (which covers Ventura County, the Sacramento Metropolitan area, the

San Joaquin Valley, San Diego County, and the Southeast Desert). In the context of the 1994 SIP,

substituting VOC-based products for MeCl will increase VOC emissions by approximately

0.1 tpd in all the 1994 SIP areas combined.

The South Coast Air Quality Management District (SCAQMD) revised their federal ozone

plan in 1999, and the U.S. EPA has proposed to approve this plan. In the 1999 revision, Perc is

not considered a VOC. In the context of the 1999 revision, if VOC-based products are substituted

for all the Perc and MeCl currently used in chlorinated products, we expect an increase of

approximately one ton per day of VOC in the South Coast Air Basin. The ARB and the

SCAQMD will address this shortfall in the next comprehensive revision of the South Coast ozone

SIP.

4. Are there any concerns about the potential flammability of automotive consumer products?

Industry groups representing product manufacturers raised the issue that AMR facilities

need to continue their usage of chlorinated aerosols, especially in areas where use may occur near

flame, heat, or other ignition sources. However, a search of statewide and national databases as

well as inquiries to fire departments and associations across the State were unable to locate any

reports of fires, injuries, or other incidents related to the use of non-chlorinated products in AMR

facilities. Additionally, the California State Fire Marshal’s office indicated that the combustion of

gasoline, such as from a leaking fuel line, poses a significantly greater flammability concern than

the use of aerosols.

During the site visits, ARB staff observed brake service operations at one facility using a

flammable, non-chlorinated aerosol product occurring in one service bay and welding operations

occurring in another service bay. ARB staff also observed chlorinated products that were listed

as flammable on the product label, which indicates that chlorinated products can also be

flammable.

An additional 16 site visits were conducted to specifically investigate flammability issues. 

Only one facility reported an incident (non-injury) associated with the use of a flammable product. 

This facility, however, attributed the incident to a vehicle malfunction and continues to use

flammable products almost exclusively. Additionally, none of the facilities visited indicated that

flammability concerns were a factor when making decisions on which products to buy (cost was

the major factor). Instead, discussions with facility operators indicated that most facilities

consider all aerosol products flammable and use common safety precautions when using these

products. Therefore, we believe flammability is sufficiently addressed by the use of good

operating practices on the part of facility owners, mechanics, and technicians. This belief is 
13

supported by the fact that most facilities already use a host of flammable products and that

non-flammable alternatives such as aqueous-based portable brake cleaning units and water-based

aerosol products are readily available and in use.

IX. RECOMMENDATION

We recommend that the Board adopt the proposed regulation contained in Appendix A of

the TSD. The proposed regulation would remove Perc, MeCl, and TCE from automotive

consumer products used in AMR activities. In recognition of the requirement to adopt best

available control technology when suitable alternatives are available, the proposed regulation

would prohibit manufacturers from selling brake cleaners, carburetor cleaners, engine degreasers,

and general purpose degreasers that contained Perc, MeCl, or TCE in California. Since

non-chlorinated VOC-based products in these four categories predominate, alternative products

are considered to be technically feasible and available. Additionally, effective non-aerosol

products are also readily available. The proposed regulation would also prohibit facility owners

or operators from using products containing Perc, MeCl, and TCE for AMR activities. Benefits

from the proposed regulation include nearly 100 percent reductions in emissions, exposure, and

risk from Perc, MeCl, and TCE-containing brake cleaners, carburetor cleaners, engine degreasers,

and general purpose degreasers. Additional benefits include reduced waste water and hazardous

waste contamination, and reduced workplace exposure.
State of California

AIR RESOURCES BOARD

Staff Report: Initial Statement of Reasons

for the Proposed Airborne Toxic Control Measure

for Emissions of Chlorinated Toxic Air Contaminants

from Automotive Maintenance and Repair Activities

Volume II:

Technical Support Document
I-1

I. INTRODUCTION

A. Overview

The compounds perchloroethylene (Perc), methylene chloride (MeCl), and

trichloroethylene (TCE) are found in automotive consumer products commonly used in

automotive maintenance and repair activities (AMR activities). The Air Resources Board (ARB

or Board) has identified these compounds as toxic air contaminants (TACs) under California’s

Toxic Air Contaminant Identification and Control Program.

Once the compounds Perc, MeCl, and TCE were identified as TACs, the ARB was

required under the Toxic Air Contaminant Identification and Control Program to: (1) prepare a

report on the need and appropriate degree of regulation for the compounds, and (2) adopt

regulations to reduce emissions of the compounds. These regulations are called airborne toxic

control measures (ATCMs) or control measures. In this report, we use the terms regulation,

control measure, and ATCM interchangeably. State law requires that such control measures for

TACs without a Board-specified threshold exposure level be based on the best available control

technology or a more effective control method in consideration of cost and risk. 

This volume of the Initial Statement of Reasons for the Proposed Airborne Toxic Control

Measure for Emissions of Chlorinated Toxic Air Contaminants from Automotive Maintenance

and Repair Activities, presents information on the toxic air contaminant identification and

control process, the report preparation process, and previous identification and control

(regulatory) activities for Perc, MeCl, and TCE. It also presents information on consumer

product regulatory activities. It then presents compound-specific physical characteristics and

information on sources and ambient concentrations. That is followed by a discussion of typical

automotive maintenance and repair activities, exposure, and health effects for these three

compounds. Finally, this volume presents the proposed control measure, and its health,

economic, and environmental impacts.

B. Purpose

At its November 21, 1996, hearing, the Board adopted amendments to exempt Perc from

the volatile organic compound (VOC) definition in California’s Regulation for Reducing VOC

Emissions from Consumer Products (Consumer Products Regulation; section 94521, title 17,

California Code of Regulations). This action allowed manufacturers to reformulate consumer

products with Perc to meet the VOC limits of the Consumer Products Regulation. 

During the hearing, the Board expressed concerns about the potential for an increase in

the use of Perc in consumer products, and the possible health impacts that might result. 

Therefore, the Board directed the ARB staff to conduct an assessment under the State’s toxic air

contaminant control program of the need to control Perc use in consumer products. At the
I-2

hearing, automotive consumer products, and specifically brake cleaning products, were identified

as the consumer products category most likely to contain, or be reformulated to contain, Perc. 

Consequently, staff initially evaluated Perc use in brake cleaning products. The preliminary

results of this initial assessment were discussed in the Perchloroethylene Needs Assessment for

Automotive Consumer Products: Status Report released in June 1997 (June 1997 Status Report)

and presented to the Board at its June 26, 1997, meeting. An additional update on the

assessment, incorporating additional data and analyses, was provided to the Board in a May 1998

Memorandum. These documents indicated that, based on the available information, an ATCM

should be developed to reduce Perc emissions from brake cleaning products. Later, as a result of

preliminary information raising concerns about compound and product interchangeability, staff

extended the evaluation to include the use of Perc, MeCl and TCE, not only in brake cleaning

products, but also in carburetor cleaners, engine degreasers, and general purpose degreasers. 

This report presents the information evaluated by the ARB staff, including: (1) analyses

of two surveys of automotive consumer products manufacturers and AMR facility operators; (2)

site visits to AMR facilities; and (3) chlorinated compound emissions and potential health

impacts. It then discusses the recommended control measure and its impacts.

C. Regulatory Authority

The California Toxic Air Contaminant Identification and Control Program (Program),

established under California law by Assembly Bill 1807 (Chapter 1047, Statutes of 1983) and set

forth in Health and Safety Code (HSC) sections 39650 through 39675, is designed to protect

public health by reducing emissions of TACs. This law mandates the identification and control

of air toxics in California and complements the State’s criteria air pollutant program. The

identification phase of the Program requires the ARB, with the participation of other state

agencies, to evaluate the health impacts of, and exposure to, substances and to identify those

substances which pose the greatest health threat as TACs. ARB’s evaluation is made available to

the public and is formally reviewed by the Scientific Review Panel (SRP) established under HSC

section 39670. Following ARB’s evaluation and the SRP’s review, the Board identified MeCl,

TCE, and Perc as TACs at its July 1989, October 1990, and October 1991 Board hearings,

respectively. In each case, the Board determined there was not sufficient available scientific

evidence to support the identification of a threshold exposure level (ARB, 1989; ARB, 1990a;

ARB, 1991a).

A threshold level can be defined as a level of pollutant exposure below which no adverse

health effects are likely to occur. In their evaluations of Perc, MeCl, and TCE, staff from the

California Environmental Protection Agency’s Office of Environmental Health Hazard

Assessment (OEHHA) recommended that Perc, MeCl, and TCE be treated as having no

threshold exposure level because: (1) all three compounds are potential human carcinogens, and

(2) currently, there is insufficient evidence available to designate an exposure level below which

no significant adverse health impacts are anticipated. 
I-3

Following the identification of a substance as a TAC, HSC section 39665 requires the

ARB, with participation of the air pollution control and air quality management districts

(districts), and in consultation with affected sources and interested parties, to prepare a report on

the need and appropriate degree of regulation for that substance. A needs assessment for Perc

was conducted from 1991 to 1993 as part of the ARB’s development of the ATCM for Emissions

of Perchloroethylene from Dry Cleaning Operations (Dry Cleaning ATCM), August 1993

(title 17, California Code of Regulations, sections 93109 and 93110). During that assessment,

the ARB staff determined that dry cleaning operations and solvent degreasing operations

accounted for about 80 percent of the Perc use in California (ARB, 1993a). Therefore, staff

focused their attention on dry cleaning and degreasing uses of Perc first and is now addressing

other uses of Perc. This Initial Statement of Reasons serves as the report on the need and

appropriate degree of regulation for MeCl and TCE. 

It is important to note that the proposed ATCM is not a consumer products regulation. 

Consumer products regulations are developed under authority granted to the ARB by the

California Clean Air Act (1998), and specifically Health and Safety Code section 41712. 

HSC section 41712 requires the ARB to adopt regulations to achieve the maximum feasible

reduction in reactive organic compounds (ROCs) emitted by consumer products (note: ROC is

equivalent to VOC). As discussed previously, we are proposing this ATCM under the authority

granted to the ARB by Assembly Bill 1807 (The Toxic Air Contaminant Identification and

Control Program) as codified in HSC sections 39650 through 39675. 

However, since the automotive consumer products industry has previously been subject to

regulations developed under ARB’s Consumer Products Program, we have used the phrase

“consumer products” and definitions similar to those in ARB’s consumer products regulations in

an attempt to make our ISOR more familiar and comprehensible to consumer products

manufacturers, AMR facility operators, and others who may use these products. 

D. Regulatory Activities

1. Airborne Toxic Control Measures

Once the ARB has evaluated the need and appropriate degree of regulation for a TAC, 

State law (HSC section 39666) requires the ARB to adopt regulations to reduce emissions of the

TAC to the maximum extent feasible in consideration of cost, risk and other factors specified in

HSC section 39665. To date, the ARB has developed nine ATCMs. The most recent, the

ATCM for Emissions of Perchloroethylene from Dry Cleaning Operations, August 1993 (title 17,

California Code of Regulations, sections 93109 and 93110), was expected to result in a 78

percent reduction in statewide Perc emissions from dry cleaning operations when it was fully

implemented in 1998.
I-4

2. National Emission Standards for Hazardous Air Pollutants

In the federal Clean Air Act Amendments of 1990, the United States Environmental

Protection Agency (U.S. EPA) identified Perc, MeCl, and TCE as hazardous air pollutants

(HAPs) because they were either known to have or may have adverse effects on human health or

the environment. Health and Safety Code section 39658 (b) requires the Board to designate

federal HAPs as TACs, and the Board did so in 1993 (AB 2728, Tanner). Therefore, Perc, MeCl,

and TCE are TACs both because they have been identified by the Board through the Toxic Air

Contaminant Identification and Control Program and because they are HAPs (ARB, 1993b).

In December 1994, the U.S. EPA promulgated the National Emission Standard for

Hazardous Air Pollutants: Halogenated Solvent Cleaning (the Degreasing NESHAP) to address

emissions of halogenated solvents, including Perc, MeCl, and TCE from degreasing operations

(40 CFR Parts 9 and 63). Under HSC section 39658 (b), which provides that U.S. EPA

NESHAPs are also ATCMs under certain circumstances, the Degreasing NESHAP is the State

ATCM for degreasing operations; therefore, under HSC section 39666 (d) it must be

implemented and enforced by the districts, unless the districts seek and receive approval from the

U.S. EPA to implement an alternative control measure. Sources subject to the Degreasing

NESHAP were required to comply with the regulation beginning on December 2, 1997. 

3. “Hot Spots”

In November 1997, ARB staff published the Risk Reduction Audits and Plans Guidelines

for Halogenated Solvents Degreasing Operations to assist facilities that have been identified by

the districts as significant risk facilities requiring risk reduction audits and plans under Assembly

Bill 2588 (the Air Toxics “Hot Spots" Information and Assessment Act) and Senate Bill 1731 as

set forth in HSC sections 44300 to 44394. This guideline document contains a self-conducted

audit and checklist which helps facility operators determine possible options to reduce the

potential risk posed by a facility’s degreasing operations. 

Automotive maintenance and repair facilities may be subject to the “Hot Spots” Program

if: (1) they use substances that are included on the Air Toxic Hot Spot Program list of

substances required by HSC section 44321, and (2) those substances are used in sufficient

quantities to make the facility type subject. However, AMR facilities are not required to

complete emission inventory plans or to submit these plans to the districts because they are not

included as a specific facility type in Appendix E of the Emission Inventory Criteria and

Guidelines (ARB, 1997e). Although retail gasoline service stations are currently subject to the

“Hot Spots” Program, the districts typically require the reporting of only the toxic emissions

from gasoline dispensing operations, even if other operations such as brake cleaning operations

are occurring at the service station. However, the districts have the authority to evaluate an

individual facility under the “Hot Spots” Program and require the facility to comply with the 
I-5

“Hot Spots” Program if they have good cause to believe that the facility may pose a potential

threat to public health.

4. Consumer Products

The Board not only has the authority to develop control measures to reduce emissions of

TACs, it also has the authority to develop regulations to reduce emissions of criteria pollutants

such as ozone. This section provides a brief background on the ARB’s authority to regulate

consumer products, followed by information on consumer product regulatory activities.

In 1988, the Legislature enacted the California Clean Air Act (Act), which declared that

attainment of the California state ambient air quality standards is necessary to promote and

protect public health, particularly that of children, older people, and individuals with respiratory

diseases. The Legislature also directed that these standards be attained by the earliest practicable

date. California adopted an ambient air quality standard for ozone in 1988. Strategies to reduce

ambient ozone concentrations include decreasing emissions of reactive organic compounds

(ROCs), also known as volatile organic compounds (VOCs).

The Act added HSC section 41712 requiring the ARB to adopt regulations to achieve the

maximum feasible reduction in VOCs emitted by consumer products. To date, the Board has

adopted the following six regulatory actions to fulfill the requirements of the Act as it pertains to

consumer products: 

C the Antiperspirant and Deodorant Regulation was approved in November 1989, and

required a reduction in VOC emissions from antiperspirants and deodorants;

C the “Phase I, II, and III” Consumer Products Regulations, and the Midterm

Measures II Regulation, were approved in October 1990, January 1992, July 1997,

and October 1999, respectively, and required a reduction in VOC emissions from

over 40 different consumer products categories; and

C the Aerosol Coatings Regulation was approved in March 1995, and required

emissions reductions from 35 categories of aerosol paints and related coating

products. In November 1998, the Board adopted revisions to many of the future

effective VOC limits in the aerosol coatings regulation after a review of their

technological and commercial feasibility.

Relevant to this proposal, the aerosol coatings regulation essentially prohibits “new or

increased uses” of Perc. The aerosol coatings regulation allows Perc-containing aerosol coatings

to be sold or used in California if they were sold in the State in 1992 and either complied with the

standards of the aerosol coatings regulation or could be reformulated to comply with the

standards without increasing the Perc content. Perc-containing aerosol coatings that were not

sold or used in California in 1992, or those that could not be reformulated to comply with the

standards of the aerosol coatings regulation without increasing the Perc content, are not allowed

(ARB, 1995).
II-1

II. PUBLIC OUTREACH AND REPORT PREPARATION

A. Outreach Efforts

Outreach and public participation are important components of ARB’s needs assessment

and report preparation process. For this assessment, we developed an outreach program to

involve consumer products manufacturers and their associations, AMR facility operators and

their associations, national, state and local regulatory agencies, environmental/pollution

prevention and public health advocates, and other interested parties. Through these efforts, we

have been able to obtain detailed information on the use and emissions of chlorinated automotive

consumer products. Additionally, these entities participated in the development and review of

the necessary surveys and draft reports, conference calls, working group meetings, and

workshops. They also have had a forum to address their concerns.

As part of our outreach program, we have made extensive personal contacts with industry

and facility representatives as well as other affected parties through meetings, telephone calls,

and mail-outs. Activities included:

C the formation of a Perc Needs Assessment working group;

C seven conference calls with the working group to discuss our activities;

C more than 500 telephone conversations with the working group and facility

operators;

C mailing or faxing working group agendas, minutes, draft surveys, survey analyses,

draft and final status reports to over 80 people;

C mailing workshop notices to a mailing list of over 6,000 people;

C mailing the Brake Cleaner and Perc-Containing Automotive Products Survey to

37 manufacturers and 23 other interested parties (including associations);

C mailing the Automotive Repair Facility Survey to 25,000 facilities;

C conducting eight meetings and four workshops;

C visiting 137 AMR facilities to gather information on the process and amount of

brake cleaning products used, building dimensions, and receptor locations;

C visiting five additional AMR facilities to gather information on aqueous brake

cleaning units; and

C visiting 16 additional AMR facilities and meeting with the Sacramento Valley

Fire Marshals Association to discuss flammability issues.

B. Public Involvement

As described below, affected industries, other government agencies, and organizations

interested in minimizing chlorinated solvent use have been involved in this assessment from the

beginning. To increase the general public’s participation in this assessment, we have made
II-2

information available via the ARB’s Internet web site (http://www.arb.ca.gov/toxics/acp.htm),

and have conducted four public workshops.

1. Industry Involvement

Automotive consumer products manufacturers and brake service industry representatives

have actively participated in the assessment process, providing technical information, comments

and suggestions during the development of surveys, and comments on findings. Industry

involvement in the process has also included:

C more than 250 telephone conversations with ARB staff;

C the return of 22 of 37 Brake Cleaner and Perc-Containing Automotive Products

Surveys representing about 90 percent of California product sales;

C participation of 18 workgroup representatives to review survey and risk

assessment results; and

C participation in all needs assessment conference calls and workshops.

2. Government Agency Involvement

Other local, state, and federal agencies with an interest in potential emissions of, or

soil/groundwater contamination by, Perc, MeCl, and TCE have been involved in the assessment

process to promote statewide consistency in addressing public health concerns and provide a

multi-media perspective. These agencies include: air and sanitation districts, the California

Department of Industrial Relations/Division of Occupational Safety and Health (Cal/OSHA), the

California Environmental Protection Agency’s (Cal/EPA’s) Office of Environmental Health

Hazard Assessment (OEHHA), Cal/EPA’s Department of Toxic Substances Control (DTSC),

and the U.S. EPA.

We have apprized the air districts of our activities through the California Air Pollution

Control Officers Association’s (CAPCOA) Toxics Committee, and have also requested

information that they may have on the brake cleaning process and how districts regulate the

AMR industry. This work has included telephone calls to the districts and presentations to the

CAPCOA Toxics Committee.

We have reviewed information provided to us by the sanitation districts on increasing

concentrations of Perc in the influent to publicly owned treatment works (POTWs). 

Additionally, a representative of the County Sanitation Districts of Los Angeles County has

presented this information during the May 1999 and January 2000 workshops (CSDLA, 1999b).

We have also requested information that other agencies may have on chlorinated solvent

cleaning and pollution prevention case studies. Both the U.S. EPA and DTSC have published

pollution prevention guides for the automotive maintenance and repair industry that were

reviewed in the preparation of this report. 
II-3

3. Private Organization Involvement

Two private organizations have also been involved in the assessment process. The

Institute for Research and Technical Assistance (IRTA) recently partnered with the U.S. EPA

(the study’s sponsor), DTSC, and the South Coast Air Quality Management District to conduct a

study of the effectiveness of aqueous brake cleaning units. IRTA is a non-profit organization that

assists industries, primarily small businesses, in reducing or eliminating their use of ozone

depleting substances and chlorinated solvents through demonstration and evaluation of new

technologies, solvent substitutes, and process modifications. IRTA invited ARB staff to join

them in visits to Los Angeles area automotive repair facilities conducting brake service

operations. These facilities were participants in a study of alternative brake cleaning products. 

IRTA has provided technical information on the availability, cleaning effectiveness, and relative

cost of non-aerosol brake cleaning products.

Tri-TAC, a technical advisory committee sponsored by the League of California Cities,

the California Association of Sanitation Agencies, and the California Water Environment

Association presented information about the amount of chlorinated solvents reaching POTWs,

and has participated in the development of the proposed ATCM. 

C. Data Collection Tools to Assist in Report Preparation

ARB staff developed three surveys to gather Perc usage and emissions data for use in this

assessment: the Brake Cleaner and Perc-Containing Automotive Products Survey (Manufacturer

Survey), the Automotive Repair Facility Questionnaire (Facility Survey), and the

Brake/Automotive Repair Facility Survey for site visits (Site Visit Survey). Additionally,

information from the 1997 Consumer and Commercial Products Survey (Consumer Products

Survey) was also used.

1. The Manufacturer Survey

The Manufacturer Survey was developed to gather current sales and formulation data for

both chlorinated and non-chlorinated brake cleaning products from manufacturers. It also

requested information on future formulation trends that could increase the Perc content of brake

cleaning products and other automotive consumer products. 

2. The Facility Survey

The Facility Survey was developed to estimate the number of facilities performing brake

repair operations, the number of brake jobs performed, and the type and quantity of bulk liquid or

aerosol product used. 
II-4

3. The Site Visit Survey

The Site Visit Survey was developed to gather AMR facility process information and

source characteristic information. Process information includes items such as the number of

brake jobs performed per day and the amount and types of solvent used in the process. Process

information was used to estimate facility emissions. Source characteristic information includes

building dimensions and the location of the residential and off-site worker receptors, and is used,

in conjunction with facility emissions and an air dispersion model, to assess potential health

impacts from a given facility.

4. The Consumer Products Survey

The Consumer Products Survey contains sales and formulation data for all consumer

products sold in California, including the four automotive consumer product categories addressd

by the proposed ATCM. This survey was conducted in conjunction with the Consumer Products

regulations.
1

The CAS Registry Number or CAS number is a unique accession number assigned by the Chemical Abstracts Service, a

division of the American Chemical Society. Other than being guaranteed unique to a given compound, this number has no particular meaning. CAS

Registry Numbers are assigned to every uniquely-identifiable substance.

III-1

III. PHYSICAL CHARACTERISTICS, SOURCES, AND AMBIENT

CONCENTRATIONS OF PERCHLOROETHYLENE , METHYLENE

CHLORIDE, AND TRICHLOROETHYLENE

This chapter summarizes the readily-available information on physical properties, sources

and emissions, ambient concentrations, indoor sources and concentrations, atmospheric

persistence, and Air Toxics “Hot Spots” (AB 2588) risk assessment information for Perc, MeCl,

and TCE. The information comes from ARB’s 1997 reference report, Toxic Air Contaminant

Identification List – Summaries unless otherwise noted (ARB, 1997b). This chapter also

discusses the presence of these compounds in other environmental media as it was presented in

the technical support documents for either the proposed identification of the compound as a toxic

air contaminant (MeCl and TCE), or the proposed ATCM (Perc).

A. Perchloroethylene

1. Physical Properties of Perc

Perc is a volatile chlorinated aliphatic hydrocarbon compound containing a double bond. 

At room temperature, Perc is a non-flammable, colorless, dense liquid with an ethereal odor. 

Although relatively insoluble in water, it is miscible in alcohol, ether, chloroform, and benzene. 

Perc decomposes slowly in water to yield trichloroacetic and hydrochloric acids, and is oxidized

by strong oxidizing agents.

Physical Properties of Perchloroethylene

Synonyms: tetrachloroethylene; tetrachloroethene; 1,1,2,2-perchloroethylene; ethylene 

tetrachloride; perc; PCE; Nema; Tetracap; Tetropil; Perclene; Ankilostin; Didakene

CAS Number1: 127-18-4

Molecular Formula: C2Cl4

Molecular Weight: 165.85

Boiling Point: 121 oC at 760 mm Hg

Melting Point: -22 oC

Vapor Pressure: 18.47 mm Hg at 25 oC

Vapor Density: 5.7 (air = 1)

Density/Specific Gravity: 1.6230 at 20/4 oC

Log Octanol/Water Partition Coefficient: 3.40

Conversion Factor: 1 ppb = 6.78 μg/m3
III-2

2. Sources of Perc

Perc is used as a solvent primarily in dry cleaning operations. Perc is also used in

degreasing operations, paints and coatings, adhesives, aerosols, specialty chemical production,

printing inks, silicones, rug shampoos, and laboratory solvents.

There are no producers of Perc in California. The primary stationary sources that have

reported emissions of Perc in California are dry cleaning plants, plating and polishing companies,

and aircraft manufacturers (ARB, 1999a).

Perc was registered for use as a pesticide, however as of August 1, 1990, it is no longer

registered for pesticidal use in California.

3. Emissions of Perc

The reported emissions of Perc from stationary sources in California are estimated to be

at least 4.5 million pounds per year, based on data reported under the Air Toxics “Hot Spots”

Program (AB 2588) from database year 1998 (ARB, 1999a).

4. Natural Occurrence of Perc

Perc does not occur naturally in the environment.

5. Ambient Concentrations of Perc

Perc is routinely monitored in California by the statewide ARB air toxics network. The

ARB’s ambient air monitoring network is designed to obtain ambient background, non-source

influenced, concentration levels of air toxics from 21 ambient air toxic monitoring stations

located statewide. According to ARB’s toxics database, the 1998 statewide average

concentration for Perc is 0.11 parts per billion (ppb) or 0.77 micrograms per cubic meter (μg/m3). 

The United States Environmental Protection Agency (U.S. EPA) has compiled ambient

concentration data from Columbus, Ohio during 1989 with a mean concentration of 1.59 μg/m3

,

or 0.23 ppb, and the range varied from 0.21 to 40 μg/m3 or 0.03 to 5.90 ppb. They also reported

concentrations of Perc from 13 study areas during 1989 to 1991. The overall range of

concentrations from these areas were from 0.69 to 104 μg/m3 or 0.10 to 15.34 ppb with a mean

concentration of 3.6 μg/m3 or 0.53 ppb. 

6. Indoor Sources and Concentrations of Perc

Volatilization from dry cleaned garments is probably the largest source of Perc in indoor

air. Brake cleaners, water repellents, and fabric finishes are also important sources of Perc.
III-3

Results from both indoor and personal monitoring in California homes indicate that

people are exposed frequently to Perc from indoor air. The level of exposure varies among

homes because of the different numbers and types of emission sources present in individual

homes. In a large Southern California study, the 24-hour average concentrations for residential

indoor air ranged from 2.27 to 6.72 μg/m3 while concurrent outdoor concentrations ranged from

1.74 to 4.41 μg/m3. Using personal nighttime sampling data to approximate indoor air exposure,

the 12-hour average indoor nighttime concentrations ranged from 5.45 to 8.56 μg/m3 in

comparison to the outdoor nighttime concentrations which ranged from 1.24 to 5.72 μg/m3.

The most recent California study was conducted in Woodland, California in the spring of

1990. The average concentration of Perc of 124 indoor samples was 1.44 μg/m3. Mean indoor

concentrations from the Woodland study are approximately 2.7 times greater than the outdoor

mean concentration of 0.53 μg/m3 from the same study.

7. Atmospheric Persistence of Perc

The dominant tropospheric loss process for Perc is expected to be by reaction with the

hydroxyl (OH) radical. The calculated half-life and lifetime for Perc due to gas-phase reaction

with the OH radical are 2 months and 3 months, respectively. Both nitrate radical and ozone

chemical reaction removal processes are too long to compete with the OH radical reaction. The

reaction of the OH radical with Perc has been shown to generate chlorine atoms and that in the

atmosphere the reaction forms phosgene and hydrogen chloride as well as other, as yet

unidentified, products. Therefore, Perc is sufficiently persistent to be transported throughout an

air basin before it is degraded.

8. Health Effects of Perc

See Chapter VI.C. for a discussion of the health effects of Perc.

9. AB 2588 Risk Assessment Information

The Office of Environmental Health Hazard Assessment (OEHHA) reviews risk

assessments submitted under the Air Toxics “Hot Spots” Program (AB 2588). Of the risk

assessments reviewed as of April 1996, Perc was the major contributor to the overall cancer risk

in 43 of the approximately 550 risk assessments reporting a total cancer risk equal to or greater

than 1 in 1 million. Perc contributed to the total cancer risk in 79 of these risk assessments. Perc

also was the major contributor to the overall cancer risk in 7 of the approximately 130 risk

assessments reporting a total cancer risk equal to or greater than 10 in 1 million, and contributed

to a total cancer risk in 34 of these risk assessments.

For non-cancer health effects, Perc contributed to the total hazard index in 

35 of the approximately 89 risk assessments reporting a total chronic hazard index greater 
III-4

than 1, and presented an individual hazard index greater than 1 in 19 of these risk assessments. 

Perc also contributed to the total hazard index in 23 of the approximately 107 risk assessments

reporting a total acute hazard index greater than 1, and presented an individual hazard index

greater than 1 in 4 of these risk assessments.

10. Perc in the Environment (ARB, 1993a)

Besides the air, Perc is also found in water, soil, fatty foods, fish, and human blood. This

section will discuss the presence of Perc in other environmental media.

a. Ground Water and Soil

Perc is a point-source ground water contaminant because of its widespread use and

physical characteristics. When waste water containing Perc is discharged into the sewer or Perc

is accidentally spilled onto the ground, it can migrate through the soil and into aquifers below. 

Perc is heavier than water. If discharged into the sewer, Perc can settle to the bottom of the

sewer line and migrate through clay sewer pipe into the soil layers and groundwater aquifers. 

Perc in the sewer pipes can also volatilize to a gas and penetrate the sewer wall. The Perc can

then travel through the soil layers into the ground water.

If organic carbon is present in the subsurface materials, Perc can decompose under

anaerobic conditions through “sequential reduction”. This means that one chlorine atom at a

time is removed from the Perc molecule and is replaced with hydrogen atoms. Perc is

sequentially reduced to trichloroethene, then to cis-1,2-dichloroethene, and finally to ethene .

Perc can also be degraded by bacteria. There are several bacteria involved in the

biodegradation of Perc, such as Clostridium cadaveris, Clostridium limosium, gram positive

cocci, large gram positive rods, and filaments. In the degradation process, the Perc molecule is

slowly broken down into a hydrogenate compound, with chlorine released as chlorine ions.

b. Ocean

Concentrations of Perc in the ocean are used as an indication of the environmental

background concentration in surface waters. The average background concentrations of Perc in

the North Atlantic Ocean range from 0.1 to 0.5 ppt (parts per trillion).

c. Precipitation

Perc can be present in precipitation or rainwater. Rainwater collected in 1982 in the Los

Angeles area contained 21 ppt of Perc. Perc levels in rainwater in La Jolla, and snow in southcentral California, ranged from 1.4 to 5.7 ppt. Rainwater collected in Portland, Oregon had Perc

levels that ranged from 0.82 to 9.2 ppt. Rainwater in England’s industrial cities contained Perc

concentrations up to 150 ppt.
III-5

d. Food

Food products have been found to contain Perc. It is believed that airborne Perc is the

primary contaminant mechanism for foods. Perc has been found in foods such as: dairy products

(0.3 to 13 micrograms of Perc per kilogram of dairy product (μg/kg)); meat, oils, and fats (0.01 to

7.0 μg/kg); beverages (2.0 to 3.0 μg/kg); fruits and vegetables (0.7 to 2.0 μg/kg); and fresh bread

(1 μg/kg).

e. Fish

Several European studies have been conducted to determine if Perc accumulates in fish. 

Eel, cod, coalfish, dogfish, and bid from the Irish Sea were collected and analyzed. Fish tissue

concentrations were as high as 43 nanograms of Perc per gram of fish (ng/g) (dry weight). 

Fifteen species of fish off the coast of Great Britain were found to have Perc levels ranging from

between 30 to 100 ng/g.

f. Perc Ingestion by Humans

A study in Japan was conducted to determine the Perc blood levels in individuals who

consume well water contaminated with Perc. The Perc levels in the well water ranged from

0.001 to 27 ppb. The study concluded that people who did not use well water for drinking or

cooking had non-detectable Perc blood levels (detection limit was not reported). Those people

who consumed or used well water had Perc blood levels ranging from 0.9 to 5.1 micrograms of

Perc per liter of blood (μg/l).
III-6

B. Methylene Chloride

1. Physical Properties of MeCl

MeCl is a volatile, nonflammable, colorless, liquid with a sweetish chloroform-like odor. 

It is slightly soluble in water and miscible with alcohol, ether, and dimethylformamide. In the

absence of moisture, at ordinary temperatures, MeCl is relatively stable. In dry air, MeCl

decomposes at temperatures exceeding 120 oC. MeCl evaporates relatively quickly from water. 

Possible thermal breakdown products of MeCl include phosgene, chlorine, and hydrogen

chloride.

Physical Properties of Methylene Chloride

Synonyms: dichloromethane; methylene dichloride; Freon 30; Aerothene NM; Somethine; 

methylene bichloride

CAS Number: 75-09-2

Molecular Formula: CH2Cl2

Molecular Weight: 84.94

Boiling Point: 39.75 oC at 760 mm Hg

Melting Point: -95 oC

Vapor Pressure: 349 mm Hg at 20 oC

Vapor Density: 2.93 (air = 1)

Density/Specific Gravity: 1.3255 at 20/4 oC

Log Octanol/Water Partition Coefficient: 1.30

Conversion Factor: 1 ppm = 3.47 mg/m3

2. Sources and Emissions of MeCl

 MeCl is used as a solvent, a blowing and cleaning agent in the manufacture of

polyurethane foam and plastic fabrication, and in paint stripping operations. MeCl is also used in

some aerosol consumer products, including aerosol paints, and automotive products. However,

most consumer products manufacturers have already voluntarily phased out the use of MeCl. In

addition, in the case of aerosol paints, the use will be restricted by a provision in ARB’s

regulation, "Regulation for Reducing Volatile Organic Compound (VOC) Emissions from

Aerosol Coating Products" adopted March 1995. MeCl is also found in textiles, paper, plastic,

glass, and pharmaceutical manufacturing. For some categories, such as paint removers and

aerosols, emissions from evaporation equal the amount used.

Paint removers account for the largest use of MeCl in California, where MeCl is the

primary ingredient in paint stripping formulations used for industrial, commercial, military, and

domestic applications.
III-7

The primary stationary sources that have reported emissions of MeCl in California are

manufacturers of ophthalmic goods, manufacturers of plastic foam products, and manufacturers

of motor vehicles and car bodies (ARB, 1999a).

MeCl was registered for use as a pesticide; however as of August 1, 1990, it is no longer

registered for pesticidal use in California.

3. Emissions of MeCl

The total emissions of MeCl from stationary sources in California are estimated to be

approximately 3.5 million pounds per year, based on data reported under the Air Toxics

“Hot Spots” Program (AB 2588) from data base year 1998 (ARB, 1999a).

4. Natural Occurrence of MeCl

MeCl does not occur naturally in the environment.

5. Ambient Concentrations of MeCl

MeCl is routinely monitored in California by the statewide ARB air toxics network. The

ARB’s ambient air monitoring network is designed to obtain ambient backgound, non-source

influenced, concentration levels of air toxics from 21 ambient air toxic monitoring stations

located statewide. According to ARB’s toxics database, the 1998 statewide average

concentration for MeCl is 0.62 parts per billion (ppb) or 2.15 micrograms per cubic meter

(μg/m3).

The U.S. EPA has also reported concentrations of MeCl from 13 study areas during 1989

to 1991. The overall range of concentrations from these areas were from 0.28 to 492 μg/m3

(0.08 to 140.57 ppb) with an overall mean concentration of 5.6 μg/m3 (1.6 ppb).

6. Indoor Sources and Concentrations of MeCl

Because MeCl is a constituent in many consumer products, short-term 

indoor concentrations may be several orders of magnitude higher than ambient concentrations. 

Results from a chamber study where a paint stripper was being used resulted in breathing zone

exposures up to 2,000 parts per million (ppm) averaged over one hour with peak breathing zone

concentrations of up to 33,000 ppm. Inhalation of MeCl from the indoor environment is

expected to vary depending on the degree and manner of use of products containing MeCl.

Data on indoor concentrations of MeCl are extremely limited. During June of 1990,

125 households in Woodland, California were monitored for a variety of toxic air contaminants. 

Sixty-one homes were sampled for MeCl. The mean of those samples was 83 μg/m3 or

23.92 ppb. The detection limit for MeCl was 0.7 μg/m3 or 0.20 ppb. The 90th percentile was
III-8

160 μg/m3 or 46.11 ppb, with a range from below the quantifiable limit of 0.7 to 1,700 μg/m3 or

0.20 to 489.91 ppb. Mean indoor concentrations are approximately 5.5 times greater than the

outdoor mean concentration of 15 μg/m3 or 4.32 ppb from the same study. The use of household

consumer products containing MeCl may account for its high prevalence in the homes tested.

As part of a study conducted in Los Angeles County, the indoor and outdoor air of eight

homes was sampled during the summer and analyzed for several compounds including MeCl. 

For these homes, results show overnight indoor concentrations to range from 3.5 to 12.6 μg/m3 or

0.3 to 3.6 ppb with daytime indoor concentrations ranging from 1.05 to 13.65 μg/m3 or 0.3 to 3.9

ppb. Overnight outdoor concentrations range from 0.35 to 4.55 μg/m3 or 0.1 to 1.3 ppb while

daytime outdoor concentrations range from 0.7 to 13.65 μg/m3 or 0.2 to 3.9 ppb. The results for

this study indicate that indoor concentrations of MeCl in some homes may not be substantially

higher than outdoor concentrations.

7. Atmospheric Persistence of MeCl

Reaction with hydroxyl radicals is the dominant mechanism removing MeCl from the

atmosphere. The calculated half-life and lifetime of MeCl due to gas-phase reaction with the

Oh radical are estimated to be about 0.6 years and 0.9 years, respectively. The product of the

Oh radical-initiated reaction is formyl chloride, in 100 percent yield.

8. Health Effects of MeCl

See Chapter VI.C. for a discussion of the health effects of MeCl.

9. AB 2588 Risk Assessment Information

The Office of Environmental Health Hazard Assessment reviews risk assessments

submitted under the Air Toxics “Hot Spots” Program (AB 2588). Of the risk assessments

reviewed as of April 1996, MeCl was the major contributor to the overall cancer risk in 30 of the

approximately 550 risk assessments reporting a total cancer risk equal to or greater than 1 in

1 million and contributed to the total cancer risk in 112 of these risk assessments. MeCl also was

the major contributor to the overall cancer risk in 8 of the approximately 130 risk assessments

reporting a total cancer risk equal to or greater than 10 in 1 million, and contributed to the total

cancer risk in 44 of these risk assessments.

For non-cancer health effects, MeCl contributed to the total hazard index in 24 of the

approximately 89 risk assessments reporting a total chronic hazard index greater than 1. MeCl

also contributed to the total hazard index in 30 of the approximately 107 risk assessments

reporting a total acute hazard index greater than 1, and presented an individual hazard index

greater than 1 in 8 of these risk assessments.
III-9

10. MeCl in the Environment (ARB, 1989)

Other routes of exposure to MeCl include the ingestion of drinking water and food

products. The following comparisons simply illustrate the extent of exposures to MeCl by routes

other than inhalation. The comparisons do not imply that equivalent doses via different exposure

routes necessarily result in health effects that are equivalent. ARB staff believe that the greatest

contribution to total intake is from inhalation of MeCl.

The ARB staff estimate that for the majority of California residents, the intake of MeCl

through drinking water is less that 365 μg/year. Between January 1984, and December 1985, the

California Department of Health Services (DHS) conducted a study in which groundwater from

2,947 wells, representing 819 public water systems, was analyzed for MeCl. Less than one

percent of the wells sampled (eleven wells) contained MeCl at concentrations above the

0.5 μg/liter detection limit. For these eleven wells the median concentration was 3.0 μg/liter, the

maximum was 10.0 μg/liter, and the minimum was 0.65 μg/liter.

Groundwater supplies roughly 40 percent of California’s domestic use with surface water

making up the other 60 percent. The DHS study did not monitor surface waters for MeCl. MeCl

released into surface waters is not expected to remain due to its high volatility. The U.S. EPA

used results from two major surveys (the National Organics Monitoring Survey and the National

Screening Program for Organics in Drinking Water) to predict MeCl concentrations in the

potable water of public water systems nationwide. Based on data from both groundwater and

surface water, the EPA has estimated that 93.5 percent of U.S. population who are served by

public drinking water systems receive water with no MeCl or levels less than 0.5 μg/liter. 

Furthermore, 99.6 percent of the population receive water with concentrations at or below

10 μg/liter.

ARB staff estimated a range of annual intake through drinking water based on the

concentrations found in the DHS monitoring study (less than 0.5 to 10.0 μg/liter). Intake is

based on an average drinking water consumption of two liters per day, resulting in an intake

ranging from less than 365 μg/year to 7300 μg/year. Because MeCl is not expected to remain in

surface waters and because MeCl was not detected in over 99 percent of the groundwater wells

that DHS tested, ARB staff believe that the overwhelming majority of California population

would have annual intakes less than those reported above.
III-10

C. Trichloroethylene

1. Physical Properties of TCE

TCE is a chlorinated aliphatic hydrocarbon compound containing a double bond. It is a

dense, nonflammable, volatile, colorless liquid which is only slightly soluble in water but

miscible with organic solvents and other halogenated compounds. Most fixed and volatile oils

are dissolved by TCE. It is lipophilic. TCE has an odor threshold of 28 parts per million (ppm)

and smells similar to ether or chloroform.

Physical Properties of Trichloroethylene

Synonyms: trichloroethene; ethinyl trichloride; Tri-Clene; Trilene; Trichloran; Trichloren; 

Westrosol; Gemalgene; Chlorylen; acetylene trichloride; 1,2,2-trichloroethylene

CAS Number: 79-01-6

Molecular Formula C2HCl3

Molecular Weight: 130.40

Boiling Point: 86.7 oC

Melting Point: -73 oC

Flash Point: 89.6 oC

Vapor Pressure: 100 mm Hg at 32 oC

Vapor Density: 4.53

Density: 1.4649 at 20/4 oC

Log Octanol/Water Partition Coefficient: 2.42

Conversion Factor: 1 ppb = 5.33μg/m3

2. Sources of TCE

TCE is used in California in a variety of operations and products, including degreasing

operations, polyvinyl chloride production, adhesive formulations, and paints and coatings. TCE

is also used in miscellaneous chemical synthesis and solvent applications, and as a refrigerant

and heat exchange liquid. The major use of TCE in California, and nationwide is as a degreasing

solvent. It is not produced in California. Other sources that emit TCE include publicly owned

treatment works; groundwater aeration and air strippers; sanitary sewers; surface impoundments;

and municipal landfills. TCE is also present in trace concentrations in waste oil. According to

the World Health Organization in its review of TCE, the compound is widely distributed in

surface water, rain water, and well water.

The previously discussed 1984-85 DHS groundwater study sampled for TCE in the same

2,947 wells. TCE was found in 188 wells with a median concentration of 3.2 micrograms per

liter (μg/l). A maximum concentration of 538 μg/l was also reported. The DHS noted that those
III-11

wells supplying heavily urbanized areas generally had the higher concentrations of TCE. The

DHS developed an action level for TCE of 5 μg/l.

The primary stationary sources that have reported emissions of TCE in California are

manufacturers of pens and mechanical pencils, manufacturers of motor vehicle parts and

accessories, and blast furnaces and steel mills (ARB, 1999a).

3. Emissions of TCE

The total emissions of TCE from stationary sources in California are estimated to be

179,000 pounds per year, based on data reported under the Air Toxics “Hot Spots” Program

(AB 2588) from data base year 1998 (ARB, 1999a). No control measures have been adopted for

TCE under California's air toxic program.

4. Natural Occurrence of TCE

TCE does not naturally occur in the environment.

5. Ambient Concentrations of TCE

TCE is routinely monitored in California by the statewide ARB air toxics network. The

ARB’s ambient air monitoring network is designed to obtain ambient backgound, non-source

influenced, concentration levels of air toxics from 21 ambient air toxic monitoring stations located

statewide. According to ARB’s toxics database, the 1998 statewide average concentration for

TCE is 0.03 parts per billion (ppb) or 0.16 micrograms per cubic meter (μg/m3).

The United States Environmental Agency (U.S. EPA) has also compiled ambient air data

from Lima, Ohio during 1990 to 1991. The data show a mean concentration of 0.71 μg/m3 or

0.13 ppb. They also reported an overall mean concentration of TCE from 11 study areas during

1990 of 2.63 μg/m3 or 0.49 ppb.

6. Indoor Sources and Concentrations of TCE

TCE has limited use as a solvent in consumer products and indoor concentrations of this

chemical have been found to be quite varied. The most recent California study was conducted in

Woodland, California during the spring of 1990. The indoor concentration of TCE of 125 homes

ranged from 0.30 to 9.3 μg/m3 or 0.06 to 1.74 ppb. The average indoor concentration was

0.65 μg/m3 or 0.12 ppb.

The California Total Exposure Assessment Methodology (TEAM) studies were

conducted during 1984 and 1987. Los Angeles and Contra Costa County were included during

1984, while Los Angeles was the only area for the 1987 study. Investigators collected volatile

organic compounds (VOCs) using personal air, outdoor, and fixed-site indoor samplers. Direct
III-12

comparisons of TCE concentrations indoors and outdoors were matched. Mean indoor

concentrations of TCE ranged from 0.63 to 3.97 μg/m3 or 0.12 to 0.74 ppb. Median indoor

concentrations of TCE are 2 to 5 times greater than ambient concentrations although indoor

concentrations appear to be very dependent upon the use of consumer products containing TCE.

Concentrations of VOCs in 10 public-access buildings were monitored for three days. 

Volatile organic compounds were measured at three new buildings before and after occupancy. 

Mean three-day TCE concentrations after occupancy ranged from 7.94 to 37.68 μg/m3 or 1.49 to

7.07 ppb which the authors indicated could have been attributed to use of commercial cleaning

products.

7. Atmospheric Persistence of TCE

The primary removal mechanism of airborne TCE is its reaction with hydroxyl (OH)

radicals in the troposphere. The calculated half-life and lifetime for TCE due to gas-phase

reaction with the OH radical are estimated to be 4 days and 6 days, respectively. The reaction

forms formyl chloride and phosgene and chlorine atoms (leading to hydrochloric acid formation

in the atmosphere), together with other, unidentified, products.

8. Health Effects of TCE

See Chapter VI.C. for a discussion of the health effects of TCE.

9. AB 2588 Risk Assessment Information

The Office of Environmental Health Hazard Assessment reviews risk assessments

submitted under the Air Toxics “Hot Spots” Program (AB 2588). Of the risk assessments

reviewed as of April 1996, TCE was the major contributor to the overall cancer risk in 3 of the

approximately 550 risk assessments reporting a total cancer risk equal to or greater than 1 in

1 million and contributed to the total cancer risk in 55 of the risk assessments. TCE also

contributed to the total cancer risk in 16 of the approximately 130 risk assessments reporting a

total cancer risk equal to or greater than 10 in 1 million.

For non-cancer health effects, TCE contributed to the total hazard index in 5 of the

approximately 89 risk assessments reporting a total chronic hazard index greater than 1.

10. TCE in the Environment (ARB, 1990)

Other routes of exposure to TCE include the ingestion of drinking water and food

products. Water appears to present the major source of exposure through ingestion.
III-13

According to the World Health Organization, in its review of TCE, the compound is

widely distributed in surface water, rain water, and well water. For example, McConnel et al.

(1975) reported that rain water contained TCE in the range of a few micrograms per liter.

Cothern et al. (1986) estimated, based on U.S. EPA surveys, that of the approximately

23 million persons exposed to levels of TCE ranging from 0.5 to 5.0 μg/L, 76 percent of the

people obtained their water from surface water supplies. The higher concentrations in this range,

however, are thought to come from groundwater systems.

The California Department of Health Services measured a number of toxic compounds

including TCE in large public water systems in California (January 1984 to December 1985). 

Approximately 3,000 wells were sampled. TCE was found in 188 of the wells with a median

concentration of 3.2 μg/L. A maximum concentration of 538 μg/L was also reported. The

CDHS noted that those wells supplying heavily urbanized areas generally had the higher

concentrations of TCE. The Department of Health Services developed an action level for TCE of

5 μg/L. This is based on a cancer risk estimate by the National Academy of Science of a 10-6

excess risk of cancer due to lifetime exposure to drinking water containing 5 μg/L TCE.

Concentrations of TCE were also measured in tap water during the TEAM 84 studies. 

For the February and May sampling times in Los Angeles, the weighted median (and range) of

TCE concentrations in water were 0.04 (0.03-0.24) μg/L and 0.03 (0.03-0.56) μg/L, respectively. 

For the Contra Costa samples, the weighted median (and range) of TCE concentrations was 0.05

(0.03-0.09) μg/L. The median levels of TCE in Los Angeles and Contra Costa were very similar,

but the maximum concentrations were higher in Los Angeles.

There is limited information on the concentrations of TCE found in food, especially in

food purchased in California. There are reports of TCE in food measured in European countries. 

McConnel et al. (1975) reviewed the levels of TCE in foods in Great Britain and Europe and

reported a range of 0.02 μg/kg measured in Yugoslavian wine to 60 μg/kg measured in tea.

Ofstad et al. (1981) reported on TCE concentrations in fish in Norway. The

concentrations of TCE ranged from 5 μg/kg in a commercial salmon fillet to approximately

400 μg/kg in the cod liver oil.

Uhler and Diachenko (1987) reported the concentrations of volatile halocarbons in

process water as well as in processed foods. Out of 15 processing plants, two had detectable

amounts of TCE in the process water. None of the food items measured in the 15 plants had

detectable levels of TCE (limit of less than 1 nanogram [ng] per gram of food).

Entz and Diachenko (1990) reported the concentrations of TCE in 50 margarine samples

purchased in 1980-1982 and 18 samples purchased in 1984, all from the Washington, D.C. area. 

Out of the 50 samples, one sample had TCE concentrations in the 100-500 ppb ranges, nine

samples were in the 10-50 ppb range, seven samples were in the 3-10 ppb range, and 35 samples
III-14

had undetectable amounts of TCE. Of the 18 samples measured in 1984, three samples were in

the 10-50 ppb range, one was in the 3-10 ppb range, and 14 samples had undetectable amounts of

TCE.
IV-1

IV. SUMMARY OF AUTOMOTIVE MAINTENANCE AND REPAIR

ACTIVITIES

During the needs assessment phase, usage of perchloroethylene (Perc), methylene

chloride (MeCl), and trichloroethylene (TCE) was examined in four automotive consumer

product categories: brake cleaners, carburetor and fuel-injection air intake cleaners (carburetor

cleaners), engine degreasers, and general degreasers (including most aerosols and some bulk

parts washers). This chapter provides a description of each product category and information on

how and where the products are used (based on information collected from surveys and site

visits). 

A. Description of Product Categories

1. Brake cleaner

Automotive brake cleaners are designed to remove oil, grease, brake fluid, brake pad

material, and dirt from motor vehicle brake mechanisms. These products are sometimes labeled

for use in cleaning dirt or grease from other motor vehicle parts and may be used

interchangeably. Automotive brake cleaners are sold in both aerosol and liquid forms.

Aerosol brake cleaners are typically sprayed on the entire brake assembly prior to service

or repairs to wet down dust and to remove oil, grease, or other contaminants. Aerosol brake

cleaners are also used on individual components after disassembly, often to remove greasy

fingerprints or other contaminants from friction surfaces.

Liquid or bulk brake cleaners are used primarily by professional mechanics. The

solvent-based bulk brake cleaners can be converted in the shop to an aerosol by using a refillable

sprayer that is pressurized using the shop air compressor. Once the product is pressurized, it is

used in the same way as the pre-packaged aerosol products. Liquid products can also be

transferred to hand-held pump sprayers for use. There are also solvent-based and water-based

portable brake cleaning units that are comprised of a base reservoir of cleaning solution with a

collection pan on top and a nozzle and brush. Mechanics position the unit under the wheel and

typically spray down the entire brake assembly with the cleaning solution and use the brush as

necessary to clean the brake components. The dirty solution then drips off the brake assembly

and is collected in the pan and routed into the reservoir where it may be filtered to remove brake

dust, oil and grease. Some companies that supply these devices to shops establish a recycling

schedule where they routinely pick up the spent bath solution and replace it with a fresh bath. 

Other companies aqueous systems depend on the mechanic to replace or recharge the

water-based solutions. There are also portable brake cleaning units available that can be filled

with the mechanic’s choice of solvent brake cleaner.
IV-2

2. Carburetor Cleaner

Carburetor and fuel-injection air intake cleaners are products designed to remove fuel

deposits, oil, dirt, and other contaminants from a carburetor, choke, throttle body of a

fuel-injection system, or associated linkages. Carburetor and fuel-injection air intake cleaners are

used during routine maintenance and repairs by both “do-it-yourself” and professional

mechanics. These products are sometimes also labeled for use in cleaning dirt or grease from

other motor vehicle parts, including brake parts. Both aerosol and liquid products are sold, but

each form is used in a different manner.

The aerosols are used to remove deposits from carburetors, throttle bodies, and associated

parts, usually while they are still attached to the engine. Aerosols can be used to remove fuel

deposits from the inside surfaces of carburetors by spraying into the carburetor throat while the

engine is running, or by spraying the carburetor wells or throttle plate with the engine off and

then starting and idling the engine. The solvents in the product combine with the fuel and are

carried throughout the inside passages of the carburetor, eventually reaching the combustion

chamber. Many automotive maintenance and repair (AMR) facilities that responded in the

Facility Survey stated that they also used carburetor cleaners for cleaning brakes.

Since aerosol products are designed to be sprayed down the carburetor throat, they are

subject to U.S. EPA regulations for fuel additives which require manufacturers to register their

formulations. The U.S. EPA also requires manufacturers to collectively fund a literature search

on the potential health effects of using their products. Currently, manufacturers can only register

formulations with compounds containing five elements: carbon, hydrogen, oxygen, nitrogen, and

sulfur. However, formulations containing other elements were registered prior to the 1990 federal

Clean Air Act Amendments. These formulations have been essentially grandfathered from the

requirement that they contain only compounds with the five elements mentioned. Some of these

grandfathered products contain chlorinated solvents such as MeCl and Perc (ARB, 1999).

There are two types of liquid carburetor, choke, or fuel-injection air intake cleaners. The

first type is added directly to the fuel lines or the fuel tank of the vehicle to remove deposits from

fuel injectors, engine intake valves, and the combustion chamber. These products are often

labeled as fuel-injection, intake, or engine deposit cleaners or engine flush or fuel treatments. 

Carburetor or fuel-injection air intake cleaners that are designed exclusively to be introduced

directly to the fuel lines or fuel tank prior to introduction into the carburetor or fuel injectors are

not subject to the proposed ATCM.

The second type of liquid carburetor cleaner requires carburetors and associated parts to

be disassembled and immersed in a container of the liquid product for several minutes or longer. 

Some products include a basket within the solvent container that can be used to hold the parts

that are immersed, while others must be poured into a separate container to soak parts. Often,

sensitive parts made of plastic or rubber must be removed prior to immersion to prevent damage.

The cleaned parts are then removed from the solution and pressure rinsed with water. These
IV-3

types of cleaners are often labeled as “Carburetor and Metal Parts Cleaners” or “Carburetor and

Cold Parts Cleaners” and indicate that the product may be used for a variety of parts cleaning

tasks. Some of the products contain chlorinated solvents such as Perc, MeCl, and

monochlorotoluene.

3. Engine Degreasers

Engine degreasers are specialty cleaning products designed to remove grease, grime, oil

and other contaminants from the external surfaces of automotive engines and other mechanical

parts and are available in both aerosol and liquid forms. The liquid forms of engine degreasers

can further be broken down into solvent-based or water-based concentrates that need to be

diluted with water before use. Engine degreasers can also be used to clean engines on

motorcycles, boats, lawnmowers, and other powered vehicles. Typically, the entire cleaning

process requires a combination of chemicals, using various combinations of solvents to first

dissolve the contaminants, and physical action to remove the engine surface contaminants. As a

first step, many products instruct users to apply the product when the engine is still warm. Other

products direct the user to leave the engine running when applying the product. Most products

direct the user to wait 10 to 15 minutes to allow the solvents to penetrate the oil and grime. For

tough-to-remove deposits, the user may need to scrub the soil with a brush. At this point,

surfactants in water-based products emulsify the dissolved oil into the water contained in the

product. The final step requires the user to rinse the emulsified mixture to wash away the

contaminants. Although some product labels direct users to dispose of the wash effluent in

accordance with applicable environmental regulations, some facilities may discharge the wash

effluent into the sewer system.

4. General Purpose Degreasers

General degreasers consist of products designed to remove grease, grime, oil, or other

oil-based contaminants from a variety of surfaces. This definition also includes products that are

designed to clean miscellaneous metallic parts. These products are currently sold and labeled as

solvent parts cleaners or metallic parts cleaners. General degreasers typically do not include

products specifically labeled as engine degreasers, tire, gasket or paint removers, or electronics

cleaners. This category also does not include general cleaners which are typically defined as

products designed for general purpose cleaning, such as floor, kitchen, counter top, bathroom,

tile or glass cleaners.

For the proposed ATCM, general degreasers can be defined as aerosols labeled to clean

automotive parts, bulk solvent parts cleaners that may be dispensed as an aerosol via a

pressurized air sprayer or pump sprayer, or bulk liquids sold in containers designed to permit

disassembled parts to be immersed within them. Aerosol general degreasers include only

metallic parts cleaners and solvent parts cleaners. A metallic parts cleaner is defined as an

organic liquid that is designed to dissolve grease, dirt, or other contaminants solely from

miscellaneous metallic parts.
IV-4

B. Users of Automotive Consumer Products in California

Automotive consumer products are used in a variety of applications and industries

throughout California. They are most commonly used in AMR activities at service stations,

fleets, general automotive repair shops, dedicated brake repair shops, and new and used car

dealerships. The majority of Californians look to these facilities for their maintenance and repair

needs. In these facilities, automotive consumer products remove grease, grime, and dirt from a

variety of automobile parts. Examples of applications include engine degreasing, the servicing of

carburetors and throttle bodies, and brake service and repair operations. These commercial

facilities will use both aerosol and liquid products (chlorinated and non-chlorinated) contained in

a variety of delivery mechanisms. However, not all vehicle owners look to commercial facilities

for their vehicle care needs. Some owners prefer to perform their own services at their

residences or other locations. Since most people do not have the benefit of hydraulic lifts, air

compression systems, and specialty tools and equipment, the services that they can perform are

generally limited. Nonetheless, brake repair and engine degreasing are common do-it-yourself

activities. People who service their own vehicles will also use both aerosol and liquid products,

but if they use a liquid, it is more likely to be one that is easily converted into an aerosol or pump

sprayer.

Some private businesses and government agencies maintain vehicle fleets that are used

for a variety of tasks and these fleets can consist of cars, vans, trucks, buses, and other

task-specific vehicles. Many fleets operate their own maintenance and repair facilities to handle

their maintenance and repair needs. Typically, these fleet operations are indistinguishable from

their commercial counterparts with the exception that their services are not available to the

general public. Normally, fleet facilities and commercial facilities tend to be similarly equipped

and use similar automotive consumer products.

Automotive consumer products used for AMR activities are not limited to cars, trucks,

and buses, but can also be used in non-traditional applications on a limited basis. These

applications include, but are not limited to, off-road vehicles, marine vessels, and aviation. The

ARB believes that automotive consumer products are selected for these applications because they

are readily available and suitable for light-duty tasks such as small parts cleaning and degreasing.

 

C. How Brake Service and Repair Jobs Are Performed

Surveys and site visits revealed that of the four categories of concern, brake cleaners

account for the majority of product usage and that the usage occurs primarily in conjunction with

brake service operations. As a result, it is important to have a basic understanding of how brake

jobs are performed, especially since products from all four automotive consumer product

categories discussed here have been used in conjunction with brake service operations.
IV-5

1. The Brake Service Process

Brake service operations are normally performed directly on the vehicle, with the vehicle

raised to a comfortable working height for the mechanic. Brake service operations can include

inspections, adjustments, brake pad replacements and rotor resurfacing, and usually require the

disassembly, replacement or repair, and reassembly of the brakes.

Brake cleaners are routinely used in brake service operations while engine degreasers,

carburetor cleaners, and general purpose degreasers are used less frequently. As discussed in the

brake cleaner product category description, automotive brake cleaning products are designed to

remove oil, grease, brake fluid, brake pad dust, or dirt from motor vehicle brake mechanisms and

generally come in either an aerosol or liquid form. Many mechanics have discovered that

products in the other three product categories are designed to remove similar types of grease, dirt,

and grime, and can be used interchangeably on a variety of applications. Brake cleaners are

applied before, during, and after brake disassembly to dissolve contaminants, and sometimes

after reassembly as a final cleaning process to remove oil, brake fluid, and fingerprints that may

have inadvertently been redeposited on the brake assembly. After application, the brake cleaner

and dissolved contaminants either drip off, or are wiped away from the brake parts.

Many facilities use portable brake cleaning units for brake service and repair operations. 

Portable brake cleaning units, which include bird bath type units, can be used independently or in

conjunction with an aerosol product depending on mechanic preference. They are typically not

used in conjunction with other liquid products with the possible exception of liquid products that

can be converted to aerosols or pump sprayers. Mechanics use these units in their initial cleaning

step to remove the heavier accumulations of grease, grime, and dirt, but many facilities use these

units exclusively. Again, some may use aerosols as a follow-up process to remove oil, brake

fluid, and fingerprints that may have inadvertently been redeposited on the brake assembly.

Brake parts manufacturers typically issue guidelines and offer instructional materials

outlining their recommendations on how their parts should be used in conjunction with brake

service operations. When asked about why aqueous based units are demonstrated in their ASE

(Automotive Service Excellence) certification clinics, representatives for these manufacturers

listed performance, cost, and worker exposure as reasons for not using aerosol products

(Raybestos, 1999; Federal-Mogul/Wagner, 1999).

2. Regulatory Issues

To control asbestos exposure from brake and clutch surfaces, the California Occupational

Safety and Health Administration adopted mandatory methods for brake and clutch service

beginning on July 3, 1996 (title 8, California Code of Regulations, section 5208, Appendix F). 

This regulation requires that either a negative pressure enclosure/HEPA vacuum system, or a low

pressure/wet cleaning method using an aqueous solution, be used to clean asbestos-containing

brake parts during brake and clutch inspection, disassembly, repair, and assembly operations. 
IV-6

However, we observed that mechanics tend to use any brake cleaning product they choose after

the reassembly process to remove fingerprints, residual grease, and brake fluid. In addition,

mechanics may use any brake cleaning products, including water, petroleum solvent parts

washers, or other brake cleaners for cleaning non-asbestos brakes. For these purposes, some

mechanics use aerosol brake cleaners.
V-1

V. EMISSIONS FROM AUTOMOTIVE MAINTENANCE AND REPAIR

ACTIVITIES

In order to estimate emissions of perchloroethylene (Perc), methylene chloride (MeCl),

and trichloroethylene (TCE) from the four automotive consumer product categories described in

Chapter IV, ARB staff used a variety of tools. Specifically, surveys were used to obtain

information on product content and composition as well as usage data from automotive

maintenance and repair (AMR) facilities statewide. Additionally, site visits were conducted to

expand knowledge of AMR activities and how products are used in these activities. This section

presents an analysis of the methodologies used to estimate Perc, MeCl, and TCE emissions and

summarizes the findings.

A. Brake Cleaner and Perc-Containing Automotive Products (Manufacturer) Survey

In March 1997, the ARB surveyed manufacturers of brake cleaning products to gather

sales and formulation data for both chlorinated and non-chlorinated brake cleaning products, as

well as information on future formulation trends that could increase the Perc content of brake

cleaning products and other automotive consumer products (MeCl and TCE information was not

collected from this survey). Perc product sales in the Manufacturer Survey responses account for

about 90 percent of total statewide Perc brake cleaning product sales based on the ARB’s 1990

Consumer Products Survey (ARB, 1996a).

From the returned surveys (22 surveys out of 37), we received information on 89 different

brake cleaning products, 33 of which contain Perc. Based on reported sales of over 2,000,000

units ranging in size from 10 ounces to 55 gallons and Perc content from about 22 to 98 percent,

Perc usage was estimated to be approximately 2,400,000 pounds per year (lbs/yr) or 178,000

gallons per year (gal/yr) from Perc-containing brake cleaning products. This usage is

extrapolated to 100 percent to capture total Perc brake cleaning product sales, and determine that

1996 Perc sales were approximately 2.7 million pounds. Two subsequent ARB consumer

product surveys in 1996 and 1998 found approximately 2.7 and 3.0 million pounds of Perc from

California brake cleaning product sales. Of this amount, data from the Manufacturer Survey

indicated that approximately 290,000 pounds of Perc brake cleaning product sales (10 percent)

are used in residential applications. 

The amount of Perc from the Manufacturer Survey is more than the estimated California

Perc use from brake cleaning products in the U.S. EPA 1990 Database (ARB’s 2,700,000 lbs/yr

versus U.S. EPA’s 470,000 lbs/yr) (ARB,1996a). It is important to note that the estimate from

the U.S. EPA 1990 Database may not be representative of California usage since it was based on

a nationwide study. However, some of the difference may be attributed to the reformulation of

brake cleaning products that contained 1,1,1-trichloroethane (TCA), which has been phased out 
V-2

under the Montreal Protocol. For comparison, 1991 Perc usage in dry cleaning operations was

approximately 14,800,000 lbs/yr or 1,100,000 gal/yr (ARB, 1993a). Table V-1 summarizes the

Manufacturer Survey data.

Table V-1. Summary of Manufacturer Survey Information

Product Type Number of

Products

Product Size Units Sold in California1

Aerosol

(oz)

Liquid

(gal)

Industrial/

Institutional

Retail/

Household

Perc Products 33 10 to 22 1 to 55 1,883,604 254,009

Non-Perc Products 56 12 to 21 1 to 55 2,397,228 377,901

B. Automotive Service Facility Questionnaire (Facility Survey)

1. Background

As previously discussed, California brake cleaning product sales were extrapolated from

the Manufacturer Survey responses to determine that brake cleaning products sold in 1996

contained almost 2.7 million pounds of Perc. In order to verify that this amount was used by

automotive maintenance and repair facilities, a survey of automotive maintenance and repair

facilities was conducted. This survey requested information on the number of facilities

performing brake repair operations, the number of brake jobs performed, and the types and

quantities of bulk liquid and aerosol products used.

The survey mailing list was based on information available from existing databases

maintained by the California Department of Consumer Affairs, Bureau of Automotive Repair

(BAR), the California Board of Equalization, and the United States Census Bureau. These

databases showed that there were about 31,000 to 34,000 facilities in the automotive repair and

car dealer standard industrial classification (SIC) codes in California as summarized in

Table V-2. The BAR database appeared to be the most comprehensive, and identified facilities

that, by their name, would most likely not perform brake services. For example, any facility with

the words “body”, “paint”, “transmission”, etc. was removed. In January 1998, surveys were

mailed to approximately 25,000 remaining automotive maintenance and repair facilities and

6,820 usable surveys were returned (725 were incomplete and were not considered). The number

of usable surveys returned was sufficient to be considered representative and accurate for all

facilities statewide (2.5% margin of error, 99% confidence level). A copy of the survey form can

be found in Appendix B.
V-3

Table V-2. Number of Businesses by SIC Code

SIC Business Type Number of Facilities

551 new and used car dealers 2,400

552 used car dealers 6,700

554 gas stations, gas & convenience food

stores, other gas & truck stops 9,600

7533-4,

7536-8

general auto repair, other auto repair,

tire retread

12,800 to 14,800

7539 brake and related auto repair

Sources: The California Board of Equalization and the 1992 U.S. Economic Census

 (http://govinfo.kerr.orst.edu/cgi-bin/econ-list?02-state.cas)

2. Summary of Findings

Analysis of the survey data allowed for the determination of the number of facilities

performing brake jobs, the various techniques used, the number of facilities using chlorinated

products, the amount of chlorinated products used, and market share by product type and

manufacturer. In some cases, the Facility Survey results were compared to the Manufacturer

Survey results in order to correct for any under-reporting that may have occurred. Since the

Manufacturer Survey did not collect information regarding MeCl and TCE from the product

manufacturers, no adjustments can be made for these two compounds. As a result, emissions of

MeCl and TCE from the Facility Survey may be under-reported.

Table V-3 summarizes the techniques that automotive maintenance and repair facility

operators reported used in conjunction with brake service and repair operations. Of the 4,865

facilities performing brake jobs, 3,561 facilities reported using brake cleaning products, 258

facilities reported using other products such as carburetor cleaners or general purpose degreasers,

409 facilities reported using nothing, and 2,151 facilities reported using a aqueous-based portable

brake cleaning unit, generally in conjunction with other products. Based on the techniques used,

Table V-4 summarizes the product formulations used in the Facility Survey. Of the 3,561

facilities that reported using brake cleaning products, the majority of the facilities (2,192

facilities or approximately 62 percent) reported using a non-chlorinated brake cleaning product. 

An additional 1,369 facilities reported using products that contained some combination of Perc,

MeCl, and TCE. Table V-5 shows total aerosol and bulk product usage and estimated statewide

usage.
V-4

Table V-3. Brake Cleaning Techniques Used in Facility Survey1

Cleaning Technique Used Number of Facilities Using

Technique

Brake cleaning products 3561

Portable brake cleaning unit (aqueous) used in

conjunction with aerosols

1514

Portable brake cleaning unit used exclusively 637

Other automotive consumer products2248

Other cleaning techniques 10

No technique reported3409

 1. A facility may use more than one cleaning technique.

 2. Refers to carburetor cleaners, engine degreasers, and general purpose degreasers.

 3. The survey did not request information on the use of solvent-based portable brake cleaning units. As a 

 result, some facilities that reported using nothing may actually be using these units.

 

Table V-4. Product Formulations Used in Facility Survey

Product Formulation Number of Facilities Using Product

Non-Chlorinated Products 2192

Chlorinated Products 13631

Perc Products 836

Perc/MeCl Products 443

Perc/TCE Products 27

Perc/MeCl/TCE Products 44

Other Chlorinated Products213

Unknown Formulations 43

 1. Note: Thirty-seven facilities used more than one type of chlorinated product. 

 2. Other chlorinated products include Perc/TCA, TCE, and TCA formulations.

The Facility Survey contained two fields that requested information on the number of

brake jobs performed per week, and the amount of product used per brake job. The product of

these two fields is total usage, allowing for verification of usage estimates. Performing this

calculation yields 164,000 to 172,000 lbs/year. Although this is only 75 percent of the 218,000 to

228,600 lbs/year of aerosol use identified above, it is reasonable because some products are also

used for non-brake applications (based on site visits, see Part C). 
V-5

Table V-5. Aerosol and Bulk Product Usage for Surveyed Facilities1

Compound Usage Aerosol Use

[lbs/yr]

Bulk Use 

[lbs/yr]

Statewide Use

[lbs/yr2]

Perc

Brake Use Only 213,800 to 228,500 9,000 to 9,600 824,600 to 881,400

Brake & Non-Brake Use 218,400 to 234,000 9,000 to 9,600 841,600 to 901,500

MeCl

Brake Use Only 23,100 to 33,100 900 to 1,000 88,900 to 126,500

Brake & Non-Brake Use 24,200 to 34,800 900 to 1,000 92,900 to 132,800

TCE

Brake Use Only 2,800 to 7,200 300 to 400 11,700 to 27,900

Brake & Non-Brake Use 2,900 to 7,700 300 to 400 11,900 to 30,000

1. Rounded to nearest hundred pounds

 2. Range of use is due to the range of Perc contents reported in the Manufacturer Survey. Usage is multiplied by the ratio of the total number

 of facilities (25,243) to the number used in the survey (6820), i.e., 3.701.

Biases for four areas where potential under-reporting could take place were identified and

quantified: (1) the percent of facilities using Perc, (2) the percent of Perc-based products, (3) the

amount of Perc used per job, and (4) the number of jobs performed. Each of these evaluations is

discussed separately below. Again, this analysis is only conducted for Perc.

a. Percent of facilities using Perc

From the survey, 3,561 facilities used Perc or non-chlorinated aerosol products. This

accounts for 73 percent of the 4,865 facilities performing brake work. This is consistent with the

industry-sponsored study by John Norton of the George Mason University School of Business

Administration which showed that 77 percent of the respondents nationwide used aerosols

(Norton, 1993). The Facility Survey indicates that about 37 percent of these facilities use

Perc-based brake cleaning products (the Norton study did not request information on whether the

aerosol cleaners were Perc or non-Perc cleaners). Additionally, the data showed that for facilities

using brake cleaners, 37 percent of the brake jobs were performed using a Perc-based brake

cleaner. Additionally, 40 percent of the facilities visited during the site visits used a Perc-based

product. Therefore, it does not appear that the percent of facilities using Perc has been

under-reported.
V-6

b. Percent of Perc-based products

The under-reporting of the percent of Perc-based products can be quantified in one of two

ways: (1) by looking at the actual numerical distribution of the different product titles reported,

or (2) by identifying the percent of units sold that contain Perc. Table V-6 summarizes the actual

number of products and their relative percent and shows that the Facility Survey under-reports

the percent of Perc-based products by about 14 percent compared with the Manufacturer Survey. 

Table V-6. Proportion of Products that Contain Perc

Facility

Survey

Manufacturer

Survey

Total Number of Products 1831

89

Number of Perc Products 58 33

Percent of Total 32 37

1. There were additional products with unknown formulations, but they were discounted 

 because they only represent 1.6 percent of the total number of product entries.

Table V-7 presents the number of survey entries, where each entry represents a unit of

product, while Table V-8 presents the total number of units sold. Comparing Table V-7 to

Table V-8 it is apparent that the Facility Survey under-reports the proportion of survey entries

that contain Perc, again by about 14 percent.

Table V-7. Proportion of

Facility Survey Entries that

Contain Perc

Table V-8. Proportion of

Manufacturer Survey Entries that

Contain Perc1

Total Number of Entries 3,622 Total Units Sold 4,280,832

Number of Perc Entries 1,366 Perc Units Sold 1,883,604

Percent of Total 38 Percent of Total 44

 1. Units sold include bulk products. However, their numbers

 constitute less than 0.3 percent of the total.

This under-reporting is likely a result of the emphasis on Perc in the cover letter that

accompanied the Facility Survey, and was observed during a few site visits to facilities that had

previously submitted surveys. Correcting this bias requires adding 16 percent

([0.44 - 0.38]/0.38), to the range of product estimated earlier in Table V-5 to yield approximately

144,300 lbs/year. Additionally, if the 1.6 percent of products for which formulation data could

not be obtained are assumed to be Perc-based products, then an additional 3,900 to 7,300 lbs/year

can be added to the total Perc usage. 
V-7

c. Number of cans used 

As previously discussed, reported usage was verified by calculating the product of the

number of brake jobs per week and the quantity of solvent used per brake job. For some

facilities, this calculated usage was higher than the reported usage indicating that some facilities

could be under-reporting their true usage. In many cases, this means that product was most likely

used for other tasks besides brake service and repair. Extrapolating statewide yields an

additional 127,000 to 137,000 pounds per year Perc that could be included in the total Perc usage. 

d. Number of Brake Jobs

There is a potential for an across the board under-reporting of the number of brake jobs

performed which can be approximated by applying the normal brake service frequency to the

number of vehicles registered in California. According to the 1996 ARB Mobile Source

Emissions Inventory database, there are approximately 24 million vehicles registered in

California. Information from the Brake Manufacturer’s Council indicates that light duty cars and

trucks, which account for 88 percent of the registered vehicles (ARB, 1998), typically have their

brakes serviced every 3.5 years (Brake Pad Partnership Steering Committee, 1999). Providing

that fleets and the remaining 12 percent of vehicles (medium and heavy duty trucks and buses)

may require more frequent servicing, the average brake service frequency is approximately once

every 3 years. The result is 8,067,000 brake jobs per year or 2,747,000 more brake jobs than

represented by the extrapolated Facility Survey result of 5,320,000 brake jobs per year. 

Assuming, based on the Facility Survey, that 73 percent of these additional brake jobs are

performed using a cleaning product, that 37 percent of these are Perc, and that each Perc brake

job requires approximately 14.4 ounces of product, an additional 668,000 pounds of Perc per

year could be included in the total Perc usage.

e. Total usage

Adding each of the biases evaluated above to the baseline usage of 901,500 pounds per

year (from Table V-5) gives 1,858,100 pounds per year as shown in Table V-9.
V-8

Table V-9. Total Perc Usage

Baseline Usage Pounds per Year

ARB baseline estimate - brake cleaning products (max.) 901,500

Adjustments

Potential under-reporting of Perc-based products used 144,300

Potential under-reporting of products with no formulation data 7,300

Potential under-reporting of the amount of Perc used per job 137,000

Potential under-reporting of the number of brake jobs performed 668,000

Total 1,858,100

The Facility Survey accounts for almost 1.9 million pounds of Perc used per year. 

Considering the residential usage of approximately 290,000 pounds as discussed in Part A, total

Perc usage is almost 2.2 million pounds per year. This is approximately 200,000 pounds less

than the amount of Perc brake cleaning product reported sold in the State in the Manufacturer

Survey. However, it is about a 750,000 pounds more than the 1.45 million pounds of Perc per

year estimated from the amount of Perc that would be used on 24 million vehicles being serviced

every 3 years (using Perc for 20 percent of all brake jobs, and 14.4 ounces per job). Therefore,

the assignment of these biases is reasonable and appropriate. 

Facilities that service and repair brakes do not account for the full amount of brake

cleaner sold in California. The additional brake cleaner is potentially being used in three

additional areas: (1) facilities that were not sent a facility survey; (2) larger residential usage than

previously estimated; and, (3) emissions from the more difficult to quantify off-road, marine, and

aviation categories.

C. Brake/Automotive Repair Shop Survey (Site Visits)

In an effort to increase understanding of AMR activities as related to the use of

automotive consumer products, ARB staff conducted site visits to 137 AMR facilities across the

state (21 additional visits were conducted to observe aqueous-based brake cleaning equipment

and to evaluate flammability issues). The areas visited included Sacramento, San Diego, the Los

Angeles area, the San Francisco Bay Area, and the North State area. Facilities in Foothill and

Sierra Nevada communities were also visited. During the site visits, process and source

characteristic information was collected so that modeling could be performed to estimate the

potential health impacts associated with Perc, MeCl, and TCE emissions from the use of

automotive consumer products. Information collected included building dimensions, the location

of potential residential and off-site worker receptors, and product usage information. The site 
V-9

visits were also an opportunity to talk with shop owners and service technicians about their

experiences using chlorinated and non-chlorinated aerosol and liquid products and portable brake

cleaning units. The site visits focused primarily on brake cleaning product usage that occurred in

conjunction with brake service and repair operations.

1. Product Usage

Of the 137 facilities, 55 were using a chlorinated product, most of which were

Perc-based. Overall, the majority of facilities were using non-chlorinated products. Table V-10

summarizes the types of aerosol and liquid products used to do brake work at the site visit

facilities.

Many facilities indicated that they felt that chlorinated and non-chlorinated products

performed similarly, although a few mechanics indicated definite preferences. A large

motivating factor in determining which product was purchased by the facility at any particular

time was cost. When replenishing their supply of aerosol brake cleaners, facilities typically

asked their suppliers to send the least expensive product. Depending on pricing at the time, this

could be either a chlorinated or non-chlorinated product. Furthermore, due to mechanic

preferences, some facilities maintained stocks of both chlorinated and non-chlorinated products.

Table V-10. Product Formulations Used in Site Visit Facilities

Product Formulation1,2 Number of Facilities

Using Product

Product Size

Aerosol

(oz)

Liquid

(gal)

Non-Chlorinated Products 82 5 to 19 1 to 55

Chlorinated Products 55 17 to 25 1

Perc Products 43 19 to 20 1

Perc/MeCl Products 10 17 to 25 none observed

Perc/TCE Products 2 18 to 24 none observed

1. The site visits did not reveal any products the were comprised of either MeCl or TCE as the sole chlorinated component or any

 multicomponent products consisting of Perc, MeCl, and TCE. This does not indicate that these product formulations do not exist.

2. A product is considered chlorinated if it contains Perc, MeCl, or TCE. 

Liquid products are not necessarily convenient to use in the gallon-sized containers they

typically come in. As a result, most facilities converted these into aerosol form or into pump

sprayers for easier use. The use of portable brake cleaning units (both aqueous and

solvent-based) was also prevalent during the site visits. As discussed in Chapter IV, these units

can be used either independently or in conjunction with aerosol products. However, a facility 
V-10

that uses both aerosol brake cleaning products and portable brake cleaning units may not

necessarily use these products in tandem. One mechanic may prefer to use the aerosol

exclusively and another at the same facility may prefer to use the portable unit exclusively. This

mode of use between the two products was the most common observed. The data showed that 78

of the 137 facilities were using a portable brake cleaning unit. Table V-11 summarizes site visit

observations of whether portable brake cleaning units were used in conjunction with other

products. 

Table V-11. Use of Portable Brake Cleaning Units in Site Visit Facilities

Portable Brake Cleaning Unit Usage Number of Facilities

Used in conjunction with aerosols 69

Used exclusively 9

Total: 78

Portable brake cleaning units gained their popularity as a means to satisfy the asbestos

brake dust control regulations. However, many facilities indicated that they also used these units

on non-asbestos brakes because they discovered that they worked equally well in controlling

brake dust from non-asbestos brakes. Additionally, many shops reported cost savings associated

with the use of these units, even after taking into consideration the cost of having the spent baths

changed or replaced. In fact, some shops encouraged their technicians to minimize their use of

aerosol products in favor of the portable units. 

Most of the shops that were visited did not have pre-established guidelines outlining how

much aerosol product was to be used. Instead, these facilities relied upon what the mechanic felt

was an appropriate amount to complete the task. Additionally, some facilities also reported using

brake cleaning products for small parts cleaning and degreasing on a limited basis. A common

complaint, however, was that some mechanics would use an excessive amount of aerosol product

and that it was difficult for the owner or shop foreman to control this usage; even if

pre-established usage criteria was in place. Many facilities felt that the use of portable brake

cleaning units minimized these problems and reduced operating costs.

When using liquid-based cleaning methods such as portable brake cleaners, drying time is

a reasonable concern. However, most of the 78 facilities that were using these units indicated

that drying time was not an issue. According to the mechanics, since brake jobs are typically

performed on a per axle basis, the brake assembly on one end has ample time to dry while the

other is being serviced. By the time the tires are re-installed, both assemblies have had ample

drying time. None of the facilities visited reported any problems, safety concerns, or customer

complaints associated with the use of portable brake cleaning units or other liquid cleaning

methods. 
V-11

In addition to aerosols, liquid products, and portable brake cleaning units, other cleaning

methods observed included soap and water and brushing. These methods were used at only a

few of the facilities visited.

2. Source Characteristics

Source characteristic information was needed to estimate potential health impacts and

assist in the development of the generic facilities (discussed in Chapter VI and Appendix D). 

The information collected here includes the number of brake jobs performed at each facility and

the physical dimensions of the service area. The number of brake jobs came directly from the

facility owners and shop foremen. When obtaining the physical dimensions, only the portion of

the facility building where service work was performed (and hence from where any potential

emissions would be emanating) was measured. Other areas of the facility, such as the customer

waiting area and adjacent storage rooms, were not considered if they were separated by a

normally closed door. If the door was normally open, then those areas were considered as part of

the area from which emissions would occur. Table V-12 summarizes the average number of

brake jobs and building dimensions (in terms of facility volume) for the site visit facilities. A

more detailed compilation of source characteristic information for each facility is presented in

Appendix D. 

Table V-12. Summary of Source Characteristics

Average Number of

Brake Jobs

[jobs/year]

Total Number of 

Brake Jobs

[jobs/year]

Average Facility

Volume 

[m3]

Range of Facility

Volumes 

[m3]

936 111,956 3,769 206 to 70,679

3. Receptor Locations

Another piece of information collected during the site visits was the location of the

nearest residential and off-site worker receptors. The data shows that many receptors tended to

be located 50 to 100 meters away from the facility; however, there were a significant number of

receptors located less than 30 meters away. Table V-13 summarizes the number of facilities that

had receptors located less than 20, 30, 50, and 100 meters away from the facility.
V-12

Table V-13. Number of Site Visit Facilities with Receptors at Various Distances1

Receptors Less than

20 meters

Receptors Less than

30 meters

Receptors Less than

50 meters

Receptors Less than

100 meters

Resident Worker Resident Worker Resident Worker Resident Worker

17 45 33 65 48 84 68 103

1. Receptor distances measured from edge of the facility building.

The facilities with either a residential or off-site worker receptor located nearby tended to be

smaller facilities. Larger facilities, which include dealerships and fleets, usually had a buffer

created by a large site footprint surrounding the building that housed the service operations. As a

result, this limited the proximity of receptors to these facilities. With the smaller facilities, the

nearest off-site receptor could be much closer. For all 137 facilities, residential receptor

distances ranged from 5 meters to 3219 meters (approx. 2 miles) and off-site worker receptor

distances ranged from 2 meters to 483 meters. At the 54 facilities that were modeled, residential

receptor distances ranged from 6 meters to 2414 meters (approx. 1.5 miles) and off-site worker

receptor distances ranged from 3 meters to 483 meters. See Table VI-2 and Appendix D for

more information on modeling results. 

4. Emissions from Site Visits

The majority of the information collected during the site visits focused primarily on brake

service and repair activities. As a result, emissions estimates (as well as potential health impacts)

are based primarily on the number of brake jobs performed. Other activities occurring at the

facility impact emissions to the extent that any product used on those activities is also used to

perform brake work. This impact is included because ARB staff quantified the total usage of the

product used to do brake work, even if it was used to complete other tasks. Therefore, emissions

and health impacts are associated with overall product usage rather than just brake service and

repair activities. 

In quantifying Perc, MeCl, and TCE emissions from automotive consumer products,

ARB staff looked at various studies, including those by the ARB, U.S. EPA, and John Norton of

George Mason University (Norton, 1993), and could not find sufficient information

representative of California automotive maintenance and repair facilities. Therefore, to estimate

emissions from individual automotive maintenance and repair facilities, information from the

137 site visits was used to estimate these emissions.

Information was also collected from the California Board of Equalization, the California

Department of Consumer Affairs’ Bureau of Automotive Repair, and the United States

Economic Census to estimate that there are about 31,000 to 34,000 AMR facilities in California

(BOE, 1997a; BOE, 1997b; BAR, 1997; U.S. Economic Census, 1992). Based on the standard 
V-13

industrial classification (SIC) breakdown within the United States Economic Census,

approximately 21,000 of these facilities may perform brake services in California. These

facilities can be grouped into five categories: service stations, fleets, new and used car

dealerships, brake shops, and general automotive repair facilities. Table V-14 gives a description

of each facility category.

Table V-14. Description of Automotive Maintenance and Repair Facility Categories

Facility Category Category Description

Service Stations Offer automotive repair services where gasoline and other fuels can be

purchased. These facilities repair mainly passenger and light-duty vehicles.

Fleets Governmental agencies and private companies operate fleets of vehicles

ranging from passenger cars to heavy-duty trucks and buses. Fleet centers

typically encompass a large area, which limits how close offsite receptors can

be located.

New and Used Car Dealerships

(Dealerships)

Many new and used car dealerships offer a complete range of brake repair

services in addition to other automotive repair services. Their services are not

limited to customers who purchased a vehicle from them.

Brake shops Some shops limit their services to brake service and repair activities. In many

cases, however, additional repair services are often available. 

General Automotive Repair Includes independently-owned shops, franchises, chain shops, tire replacement

and repair shops, and passenger car and truck rental and leasing.

The site visit data indicated that the quantity of Perc, MeCl, and TCE that is emitted per

brake job varies with several factors. These factors include the individual mechanic who is

servicing the vehicle, the chlorinated content in the product, and the manner in which the product

is used. Emissions are also impacted by the size and operating schedule of the facility. 

Furthermore, the aerosol spray cans that contain the products come in several sizes with the

chlorinated content ranging from 20 percent to 99 percent according to manufacturers’ material

safety data sheets. As a result, the emission estimates summarized in Tables V-15 and V-16

reflect the variability in Perc, MeCl, and TCE content in brake cleaning products and the use of

chlorinated brake cleaning products on small parts cleaning, degreasing, and other activities. 

Based on observations during site visits, up to 100 percent of the Perc, MeCl, and TCE contained

in aerosol products may be emitted to the air when used in these activities.
V-14

Table V-15. Emission Estimates from Site Visits by Facility Category1

Facility Category Number of

Facilities

Visited

Range of Annual

Perc Emissions

[pounds/year]

Range of Annual

MeCl Emissions

[pounds/year]2

Range of Annual

TCE Emissions

[pounds/year]2

Service Stations 12 20 to 214 0 0

Fleets 6 18 to 1,305 0 0

New and Used Car Dealerships 24 41 to 1,525 0 0

Brake Shops 6 58 to 152 0 0

General Automotive 89 1.6 to 2,091 1.8 to 82 39 to 196

1. Based on usage of brake cleaning products. Emissions based on usage from all four automotive consumer product categories may be higher.

2. MeCl or TCE in brake cleaning products were not observed in use at service stations, fleets, dealerships, or brake shops. Since we didn’t

 specifically look for MeCl and TCE, this does not indicate that emissions of these pollutants do not occur at these facility categories. 

Table V-16. Total Emissions of Perc, MeCl, and TCE Estimated from Site Visits

Total Perc Emissions1

[pounds/year]

Total MeCl Emissions

[pounds/year]

Total TCE Emissions

[pounds/year]

14,886 to 20,066 125 235

1. Some facilities use a Perc-containing brake cleaning product which shows a Perc content range on the Material Safety Data Sheet;

 therefore, a range is presented for Perc emissions.

D. Summary of Emissions

Emissions of Perc, MeCl, and TCE from the Facility Survey and site visits are presented

in Table V-5 and Table V-16 based on facilities that service and repair brakes and use brake

cleaning products. The Facility Survey also contains information on emissions from all four

automotive consumer product categories under consideration. Table V-17 summarizes the total

emissions from all four automotive consumer product categories at all facilities surveyed by the

Facility Survey.
V-15

Table V-17. Estimated Maximum Emissions from the Facility Survey

Compound Emissions [lbs/yr]

Perc 1,858,100

MeCl 224,400

TCE 37,000

The 1997 Consumer and Commercial Products (consumer product) Survey collected sales data

from the four automotive consumer product categories. This survey shows emissions of Perc,

MeCl, and TCE greater than what is represented by the Facility Survey. As mentioned in Part B,

this difference can be attributed to: (1) facilities that were not sent a facility survey; (2) larger

residential usage than previously estimated; and, (3) emissions from the more difficult to quantify

off-road, marine, and aviation categories. Since the consumer product survey represents a more

complete picture of total compound emissions, it used to make the final emission estimates. 

Table V-18 summarizes the estimated statewide emissions of Perc, MeCl, and TCE from the four

automotive consumer product categories.

Table V-18. Statewide Emission Estimates from

Automotive Consumer Products1

Compound Emissions [tons/day]

Perc 4.2

MeCl 0.7

TCE 0.3

Total 5.2

 1. Source: 1997 Consumer and Commercial Products Survey.
VI-1

VI. POTENTIAL HEALTH IMPACTS OF PERCHLOROETHYLENE,

METHYLENE CHLORIDE, AND TRICHLOROETHYLENE FROM

AUTOMOTIVE MAINTENANCE AND REPAIR ACTIVITIES

A. An Overview of Health Risk Assessment

A health risk assessment (HRA) is an evaluation or report that a risk assessor 

(e.g., Air Resources Board, district, consultant, or facility operator) develops to describe the

potential a person or population may have of developing adverse health effects from exposure to

a facility’s emissions. Some health effects that are evaluated could include cancer,

developmental effects, or respiratory illness. The pathways that can be included in an HRA

depend on the toxic air pollutants that a person (receptor) may be exposed to, and can include

breathing, the ingestion of soil, water, crops, fish, meat, milk, and eggs, and dermal exposure. 

For this HRA, we are evaluating the impacts for Perc, MeCl, and TCE via the breathing or

inhalation pathway only. We are not evaluating other pathways of exposure because at this time

the Office of Environmental Health Hazard Assessment (OEHHA) does not routinely use

methods for assessing exposure to volatile compounds such as Perc, MeCl, and TCE by exposure

routes other than inhalation. Such multiple exposure pathway (multipathway) assessments are

traditionally used for lipophilic (fat-loving), semivolatile, or low volatility compounds such as

dioxins, polycyclic aromatic hydrocarbons (PAHs), or polychlorinated biphenyls (PCBs). 

Generally, to develop an HRA, the risk assessor would perform or consider information

developed under the following four steps. The four steps are Hazard Identification, 

Dose-Response Assessment, Exposure Assessment, and Risk Characterization.

1. Hazard Identification

In the first step, the risk assessor would determine if a hazard exists, and if so, would

identify the exact pollutant(s) of concern and the type of effect, such as cancer or respiratory

effects. 

For this assessment, the pollutants of concern (Perc, MeCl, and TCE) have been formally

identified under the AB 1807 Program as toxic air contaminants (TACs) through an open,

regulatory process by the ARB (ARB 1991a; ARB 1989; ARB 1990a). In addition, Perc, MeCl,

and TCE are hazardous air pollutants under the Federal Clean Air Act (42 U.S.C. 7412). 

2. Dose-Response Assessment

In this step of risk assessment, the assessor would characterize the relationship between a

person’s exposure to a pollutant and the incidence or occurrence of an adverse health effect.
VI-2

This step of the HRA is performed for the ARB by OEHHA. OEHHA supplies these

dose-response relationships in the form of cancer potency factors or unit risk factors (URFs) for

carcinogenic effects and reference exposure levels (RELs) for non-carcinogenic effects. The

URFs and RELs that are used in California can be found in one of three references: (1) The

California Air Pollution Control Officer’s Association (CAPCOA) Air Toxics “Hot Spots”

Program, Risk Assessment Guidelines, October 1993; (2) The OEHHA Air Toxics “Hot Spots”

Program Risk Assessment Guidelines, Part I, The Determination of Acute RELs for Airborne

Toxicants, March 1999; and (3) The OEHHA Air Toxics “Hot Spots” Program Risk Assessment

Guidelines, Part II, Technical Support Document for Describing Available Cancer Potency

Factors, April 1999. The individual URFs and RELs for Perc, MeCl, and TCE that we are using

for this HRA are presented in Section B, Part 2. 

3. Exposure Assessment

In this step of the risk assessment, the risk assessor estimates the extent of public

exposure by looking at who is likely to be exposed, how exposure will occur (e.g., inhalation and

ingestion), and the magnitude of exposure.

For automotive maintenance and repair (AMR) activities, the receptors that are likely to

be exposed include residents or off-site workers located near the facility. Onsite workers

certainly could also be impacted by the emissions; however, they are not included in this HRA

because Cal/OSHA has jurisdiction over on-site workers. More discussion on workplace

exposure can be found in Chapter VIII. Exposure was evaluated for Perc, MeCl, and TCE via the

breathing or inhalation pathway only. The magnitude of exposure was assessed through the

following process. Emissions were quantified using emission factors determined from site visits,

facility, and manufacturer surveys, and input from industry representatives. During the site

visits, other information such as physical dimensions of the source and receptor locations were

obtained. Computer air dispersion modeling was used to provide downwind ground-level

concentrations of the TACs at near-source, residential, and off-site worker locations.

4. Risk Characterization

This is the final step of risk assessment. In this step, the risk assessor combines

information derived from the previous steps. Modeled concentrations, which are determined

through exposure assessment, are combined with the URFs (for cancer risk) and RELs (for 

non-cancer effects) determined under the dose-response assessment. This step integrates this

information to quantify the potential cancer risk and non-cancer health impacts.
VI-3

B. The Tools Used for this Risk Assessment

The tools and information that are used to estimate the potential health impacts from a facility

include an air dispersion model and pollutant-specific health effects values. Information required for

the air dispersion model includes emission estimates, physical descriptions of the source, and

emission release parameters. Combining the output from the air dispersion model and the 

pollutant-specific health values provides an estimate of the off-site potential cancer and non-cancer

health impacts from the emissions of a toxic air contaminant. For this assessment, we are estimating

the potential health impacts from Perc, MeCl, and TCE emitted during AMR activities. A brief

description of the air dispersion modeling and pollutant-specific health effects values is provided in

this Chapter. A more detailed discussion, including example calculations for determining individual

acute and chronic health impacts and both individual, regional, and statewide cancer risk is presented

in Appendix C. Memorandums regarding modeling results can be found in Appendices D and E. 

1. Air Dispersion Modeling

Air dispersion models are used to estimate the downwind, ground-level concentrations of

a pollutant after it is emitted from a facility. The downwind concentration is a function of the

quantity of emissions, release parameters at the source, and appropriate meteorological

conditions. The two models that were used during this HRA are SCREEN3, version 96043, and

ISCST3, version 97363. Appendix D provides additional details on the modeling results.

Appendix C provides an example calculation illustrating how the outputs from these models are

used to calculate potential health impacts. The U.S. EPA recommends the SCREEN3 model for

first order screening calculations and ISCST3 model for refined air dispersion modeling 

(U.S. EPA, 1995a; U.S. EPA, 1995b). Both models are currently used by the ARB, districts, and

other states.

2. Pollutant-Specific Health Effects Values

Dose-response or pollutant-specific health effects values are developed to characterize the

relationship between a person's exposure to a pollutant and the incidence or occurrence of an

adverse health effect. A unit risk factor (URF) or cancer potency factor is used when estimating

potential cancer risks and reference exposure levels (RELs) are used to assess potential 

non-cancer health impacts.

 As presented in Chapter VI, Section C, exposure to Perc, MeCl, and TCE may result in

both cancer and non-cancer health effects. The inhalation URFs and non-cancer acute and

chronic RELs that are used for this HRA are listed in Table VI-1. Also included in Table VI-1

are the non-cancer acute and chronic toxicological endpoints for Perc, MeCl, and TCE. During

this assessment, new acute RELs were adopted by OEHHA for Perc and MeCl. Table VI-1

reflects the most current OEHHA-adopted health effects values for these compounds. The acute

impacts presented in the June 1997 Status Report or Needs Assessment (ARB, 1997a) used the

previous acute REL for Perc. In that report, the acute non-cancer results were all reported to be
VI-4

less than a hazard index of 1.0. Generally, hazard indices of less than 1.0 are not considered to

be a concern to public health. A hazard index is the ratio of the modeled concentration for a

toxic pollutant and the reference exposure level for that pollutant. Since the current acute Perc

REL is 2.94 times higher than the previous REL and it is used as a denominator in non-cancer

hazard index calculations, the net result of the current REL, if it were applied to the results

presented in the 1997 Needs Assessment, would show a decrease in the acute hazard indices by a

factor of 2.94. Currently, OEHHA is in the process of reviewing studies for developing new or

updating existing chronic RELs. MeCl and TCE are among the compounds under review. Once

the chronic RELs are adopted by OEHHA, they may be used in HRAs. 

Table VI-1. Pollutant-Specific Health Effects Values Used for Determining 

Potential Health Impacts 1

Compound

Cancer

Unit Risk

Factor

(ug/m3)-1

Non-cancer Reference

Exposure Levels

(ug/m3)

Toxicological Endpoints

Acute Chronic Acute Chronic

Perchloroethylene

(Perc)

5.9 E-6 20,000 35 central nervous

system; eye &

respiratory irritation

kidney; liver and

gastrointestinal

system

Methylene Chloride

(MeCl)

1.0 E-6 14,000 3000 central nervous

system

central or peripheral

nervous system;

liver and

gastrointestinal

system

Trichloroethylene

(TCE)

2.0 E-6 none 640 none

central or peripheral

nervous system;

liver and

gastrointestinal

system

1. Health effects values and toxicological endpoints were obtained from three sources:

 A) California Air Pollution Control Officer’s Association, Air Toxics Hot Spots Program, Revised 1992 Risk Assessment Guidelines, 

 October 1993. 

 B) Office of Environmental Health Hazard Assessment, Air Toxic Hot Spots Program Risk Assessment Guidelines, Part II, Technical 

 Support Document for Describing Available Cancer Potency Factors, April 1999.

 C) Office of Environmental Health Hazard Assessment, Air Toxic Hot Spots Program Risk Assessment Guidelines, Part I,

 The Determination of Acute Reference Exposure Levels for Airborne Toxicants.

A URF is defined as the estimated upper-confidence limit (usually 95%) probability of a

person contracting cancer as a result of constant exposure to a concentration of 1μg/m3 over a 

70-year lifetime. In other words, using the URF for Perc as an example, which is 

5.9 x 10-6 (microgram per cubic meter)-1 or (μg/m3)

-1, the potential excess cancer risk for a person

continuously exposed over a 70-year lifetime to 1μg/m3 of Perc is estimated to be no greater than

5.9 chances in 1 million (OEHHA, 1999b). 
VI-5

An REL is used as an indicator of potential non-cancer adverse health effects. An REL is

defined as a concentration level at or below which no adverse health effects are anticipated. 

Reference Exposure Levels are designed to protect most sensitive individuals in the population

by including safety factors in their development and can be created for both acute and chronic

exposures. An acute exposure is defined as one or a series of short-term exposures generally

lasting less than 24 hours. Consistent with risk guidelines, a 1-hour exposure is used to

determine acute non-cancer impacts (CAPCOA, 1993). Chronic exposure is defined as 

long-term exposure usually lasting from one year to a lifetime. 

C. Potential Health Effects of Perchloroethylene, Methylene Chloride, and

Trichloroethylene

This section summarizes the cancer and non-cancer impacts that can result from exposure

to Perc, MeCl, and TCE. 

1. Perchloroethylene

Exposure to Perc may result in both cancer and non-cancer health effects. The probable

route of human exposure to Perc is inhalation (ARB, 1997b). 

a. Cancer

The OEHHA staff has performed an extensive assessment of the potential health effects

of Perc, reviewing available carcinogenicity data. OEHHA concluded that Perc is a potential

human carcinogen with no identifiable threshold below which no carcinogenic effects are likely

to occur. The Board formally identified Perc as a toxic air contaminant (TAC) in October 1991

(ARB, 1991a). The State of California under Proposition 65 listed Perc as a carcinogen in

April 1988 (OEHHA, 1999c). Table VI-1 presents the current health effects values that are used

in this HRA for determining the potential health impacts.

In 1990, the U.S. Congress listed Perc as a hazardous air pollutant (HAP) in subsection

(b) of Section 112 of the Federal Clean Air Act (42 U.S.C. 7412). The U.S. EPA has classified

Perc in Group B2/C, as a probable human carcinogen, on the basis of sufficient evidence for

carcinogenicity in animals and inadequate evidence in humans. The International Agency for

Research on Cancer (IARC) has classified Perc in Group 2A, as a probable human carcinogen,

based on sufficient evidence in animals and limited evidence in humans (ARB, 1997b).

Epidemiological studies have provided some indication that the use of dry cleaning

solvents, primarily Perc, poses an increased risk of cancer for exposed workers. However,

investigators were unable to differentiate among exposures to various solvents, and other

possible confounding factors, like smoking, were not evaluated. Perc increased the incidence of

hepatocellular tumors in laboratory mice after oral and inhalation exposure and mononuclear cell

leukemia and kidney tumors in rats after inhalation (ARB, 1997b).
VI-6

b. Non-Cancer

 

Short-term (acute) and long-term (chronic) exposure to Perc may result in non-cancer

health effects. Acute toxic health effects resulting from short term exposure to high levels of

Perc may include headaches, dizziness, rapid heartbeat, and irritation or burns on the skin, eyes,

or respiratory tract. Massive acute doses can induce central nervous system depression resulting

in respiratory failure. Chronic exposure to lower Perc concentration levels may result in

dizziness, impaired judgement and perception, and damage to the liver and kidneys

(ARB, 1996b). Workers have shown signs of liver toxicity following chronic exposure to Perc,

as well as kidney dysfunction and neurological effects. Effects on the liver, kidney, and central

nervous systems from chronic inhalation exposure to Perc have been reported in animal studies

(ARB, 1997b).

In addition to CAPCOA and OEHHA listing Perc as having acute and chronic non-cancer

RELs (CAPCOA, 1993; OEHHA, 1999a), the U.S.EPA established an oral Reference Dose

(RfD) for Perc of 0.01 milligrams per kilogram per day based on hepatotoxicity in mice and

weight gain in rats. The U.S. EPA has not established a Reference Concentration (RfC) for Perc

(ARB, 1997b). Table VI-1 presents the current health effects values that are used in this HRA

for determining the potential health impacts. 

Epidemiological studies of women working in the dry cleaning industry showed some

adverse reproductive effects, such as menstrual disorders and spontaneous abortions, but study

design prevented significant conclusions. Women exposed to drinking water contaminated with

solvents including Perc, showed some evidence of birth defects. Inhalation exposure of pregnant

rodents to 300 parts per million Perc produced maternal toxicity and fetotoxicity manifested as

developmental delays and altered performance in behavioral tests in the offspring of exposed

mice and rats. However, Perc is not considered to be a teratogen (ARB, 1997b).

2. Methylene Chloride

Exposure to MeCl (also known as dichloromethane) may result in both cancer and

non-cancer health effects. The probable route of human exposure to MeCl is inhalation

(ARB, 1997b).

a. Cancer

The OEHHA staff has performed an extensive assessment of the potential health effects

of MeCl, reviewing available carcinogenicity data. The OEHHA staff agreed with U.S. EPA and

IARC that MeCl is either a possible or probable human carcinogen with no identifiable threshold 
VI-7

below which no carcinogenic effects are likely to occur. The Board formally identified MeCl as

a toxic air contaminant (TAC) in July 1989 (ARB, 1989). The State of California under

Proposition 65 listed MeCl as a carcinogen in April 1988 (OEHHA, 1999c). Table VI-1 presents

the current health effects values that are used in this HRA for determining the potential health

impacts.

In 1990, the U.S. Congress listed MeCl as a HAP in subsection (b) of Section 112 of the

Federal Clean Air Act (42 U.S.C. 7412). The U.S. EPA has classified MeCl in Group B2, as a

probable human carcinogen. The IARC has classified MeCl in Group 2B, as a possible human

carcinogen (ARB, 1997b). 

b. Non-Cancer

Short-term (acute) and long-term (chronic) exposure to MeCl may result in non-cancer

health effects. MeCl vapor is irritating to the eyes, respiratory tract, and skin. It is also a central

nervous system depressant including decreased visual and auditory functions and may cause

headache, nausea, and vomiting. Acute toxic health effects resulting from short term exposure to

high levels of MeCl may include pulmonary edema, cardiac arrhythmias, and loss of

consciousness. Chronic exposure can lead to bone marrow, hepatic, and renal toxicity. MeCl is

metabolized by the liver with resultant carboxyhemoglobin formation (ARB, 1997b).

In addition to CAPCOA and OEHHA listing MeCl as having acute and chronic 

non-cancer RELs (CAPCOA, 1993; OEHHA 1999a), the U.S.EPA established an oral Reference

Dose (RfD) for MeCl of 0.06 milligrams per kilogram per day based on liver toxicity in rats, and

is currently reviewing a Reference Concentration (RfC) (ARB, 1997b). Table VI-1 presents the

current health effects values that are used in this HRA for determining the potential health

impacts. 

No information on adverse reproductive effects in humans from inhalation or oral

exposure has been found, but fetotoxicity was observed in pregnant rodents exposed by

inhalation to high concentrations of MeCl throughout pregnancy as evidenced by reduced fetal

body weight and reduced skeletal ossification (ARB, 1997b).

3. Trichloroethylene

Exposure to Trichloroethylene (TCE) may result in both cancer and non-cancer health

effects. The probable routes of human exposure to TCE are inhalation and ingestion 

(ARB, 1997b). 
VI-8

a. Cancer

The OEHHA staff has performed an extensive assessment of the potential health effects

of TCE, reviewing available carcinogenicity data. The OEHHA staff agrees with U.S. EPA and

IARC that TCE is a probable human carcinogen with no identifiable threshold below which no

carcinogenic effects are likely to occur. The Board formally identified TCE as a toxic air

contaminant (TAC) in October 1990 (ARB, 1990a). The State of California under Proposition

65 listed TCE as a carcinogen in April, 1988 (OEHHA, 1999c). Table VI-1 presents the current

health effects values that are used in this HRA for determining the potential health impacts.

In 1990, the U.S. EPA listed TCE as a HAP pursuant to subsection (b) of Section 112 of

the Federal Clean Air Act (42 U.S.C. 7412). The U.S. EPA has classified TCE in Group B2/C,

as a probable human carcinogen. The International Agency for Research on Cancer classified

TCE in Group 2A, as a probable human carcinogen, based on sufficient evidence in animals and

limited evidence in humans (ARB, 1997b). 

The U.S. EPA considers the epidemiologic data on TCE carcinogenicity in humans to be

inconclusive. Increases in testicular cancer have been reported in inhalation studies in animals. 

Carcinogenic responses to TCE inhalation studies in animals are increased incidences of

hepatocellular carcinoma and adenoma in male mice; lung adenocarcinomas and malignant

lymphomas in female mice; malignant liver tumors in B6C3F1 mice; and renal tumors in rats

(ARB, 1997b).

b. Non-Cancer 

Short-term (acute) and long-term (chronic) exposure to TCE may result in non-cancer

health effects. TCE is a central nervous system depressant and has been used as an anesthetic. It

is mildly irritating to the eyes and respiratory tract. Occupational exposure to TCE has resulted

in nausea, headache, loss of appetite, weakness, dizziness, ataxia, and tremors. Acute exposures

to high concentrations has caused irreversible cardiac arrhythmias, nerve and liver damage and

death. Chronic exposure to TCE has also been shown to cause respiratory irritation, renal

toxicity, and immune system depression. Alcohol consumption in humans increases the toxicity

of TCE and causes "degreaser's flush", which are red blotches on the skin (ARB, 1997b).

A chronic non-cancer REL is listed in the California Air Pollution Control Officers

Association (CAPCOA), Revised 1992, Risk Assessment Guidelines, October 1993. Table VI-1

presents the current health effects values that are used in this HRA for determining the potential

health impacts. The U.S. EPA currently is reviewing the Reference Concentration (RfC) and the

oral Reference Dose (RfD) for TCE (ARB, 1997b).
VI-9

There is inadequate information to determine whether TCE causes reproductive toxicity

in humans. One study reported increased miscarriages in nurses exposed to TCE as well as other

anesthetics. An association was found between elevated levels of contaminants, including TCE,

in drinking water and congenital heart disease in children. Other studies have not reported

adverse reproductive effects in humans exposed to TCE in drinking water. In animal studies, an

increase in abnormal sperm morphology in mice exposed by inhalation was reported. Exposure

of rats and mice to TCE by inhalation causes a significant delay in fetal maturation and an

increase in embryotoxicity (ARB, 1997b).

D. Factors that Affect the Outcome of a Health Risk Assessment at Automotive

Maintenance and Repair Facilities 

Factors that affect the outcome of potential health impacts at AMR facilities from the use

of aerosol and liquid products that contain some combination of Perc, MeCl, or TCE include:

(1) the concentration of Perc, MeCl, or TCE in the product(s) used; (2) the facility operating

schedule; (3) product use; (4) the physical dimensions of the facility; and (5) local meteorology. 

The combinations of these factors will ultimately determine the potential impact. Due to the

variability of these factors, the potential health impacts can also vary. For example, if only the

Perc-content were to increase, and all other factors were held constant, the resulting potential

health impacts would also increase. Ultimately, each scenario of interest must be independently

analyzed to determine the impacts of the individual factors. 

To provide perspective for some of the factors that can affect the HRA results, a

discussion looking at the variability of meteorological data sets on specific and generic facilities,

the brake job frequency, and building orientation at the generic facilities is provided here for your

information. Variability arises from differences in the characteristics of facilities, or inputs used

in the models, such as the period of meteorological data, or differences in brake job frequencies

week to week. In short, variability can be thought of as the natural variation in conditions or

parameters. We are also including a qualitative discussion of the uncertainties in the HRA

process. Uncertainty is defined as a lack of knowledge about factors that impact risk where

uncertainty may be reduced by further study (U.S. EPA, 1995c). In short, uncertainty can be

thought of as the level of confidence in estimating a particular condition or parameter. Variability

and uncertainty can be interrelated in the HRA process.

Meteorological conditions can be a source of variability in an HRA. Annual average,

model-estimated concentrations from representative off-site meteorological data were used to

determine the potential cancer risk and non-cancer hazard indices for 13 specific and three

generic facilities using ISCST3. Maximum-hourly concentrations were used to determine the

non-cancer acute hazard indices. The methods used to obtain these concentration are consistent

with current risk assessment guidance (CAPCOA, 1993). The modeling analyses are discussed

in Appendix D and example calculations using this information are in Appendix C. 
VI-10

 If source-specific operating conditions are held constant, changes in the meteorology will

drive any changes in the health impact estimates. That is, because meteorology conditions vary

from hour-to-hour and year-to-year, so too will the health impact estimates. In addition,

meteorological conditions will vary depending upon which region of the state a facility is located. 

The meteorology data sets used in this HRA represent collection periods of as long as six years

and are representative of 10 different regions. 

Another situation where variability is present in the HRA is the number of brake jobs

performed per week. If all other variables remain constant, the potential health impacts are

proportional to the number of jobs performed at the facility; therefore, if half the jobs are

performed, then the potential health impacts are halved, if the jobs double, the potential health

impacts double. In addition to the number of jobs impacting the results, if the nature of the

services provided at the facility changes or the brand of product changes these too can impact

results. For this HRA, we used the data from our survey data and site visits to estimate that small

(G-01) facilities perform 20 brake jobs per week and medium (G-02), and large (G-03) facilities

both perform 60 brake jobs per week. The results in Tables VI-7 to VI-13 reflect this

assumption. 

The building orientation is another parameter that can provide variability in dispersion

characteristics and therefore the range of concentration and potential health impacts. For

example, rectangular buildings can be arranged so that they are oriented with the smallest side

parallel (or at zero degrees), diagonal (or forty-five degrees), or the shorter side perpendicular

(ninety degrees) to the predominant wind direction. A building orientation of zero, ninety, and

forty-five degrees will yield the highest to lowest concentrations, respectively. For use in

modeling generic facilities, the zero orientation was chosen because it is impossible to predict the

orientation of the approximately 25,000 AMR facilities in California. By choosing this

orientation with default meteorological data, the wind direction is oriented along the length of the

rectangle buildings producing maximum concentrations. This practice provides confidence that

in most cases we are sure to encompass the potential health impacts of any facility in the State. 

To evaluate the generic facilities with representative off-site meteorology, the facilities were

oriented in the same standard position, however, the representative off-site meteorology was not

forced along the length of the rectangle buildings. This exercise provides a range of variability

that could result from the three generic facilities using both default and regional meteorological

data. See Appendix D for a detailed discussion of the air dispersion modeling methodology used

for generic facilities including a sensitivity analysis discussion illustrating the effects of building

orientation under default meteorological conditions.

Risk assessment is a complex process which requires the integration of many variables 

that are intended to simulate real-life processes. Although ARB staff used current California risk

assessment methodology, including the most recent cancer potency factors and reference

exposure levels, and U.S. EPA approved air dispersion models to conduct the health risk

assessments, there is uncertainty in health risk assessment.

 
VI-11

An example of uncertainty included in the derivation of its health values used in the risk

assessment is the extrapolation of toxicity data from animals to humans. Other examples of

uncertainty in an HRA are included in the air dispersion models. For example, while

representative off-site meteorological data provides an improved estimate of the dispersion of

emissions from a facility over default meteorological data, regional meteorological data is not

necessarily site specific. Since regional meteorological data for the facility is not compiled at the

actual facility site, there is some uncertainty in the modeled results. Due to microenvironmental

factors, the representative off-site meteorological data can either overestimate or underestimate

modeled concentrations at AMR facilities. It should be noted that when site-specific or

representative off-site meteorological data is not available default meteorological data is typically

used. Default meteorology data consists of a standard range of tabulated meteorological

conditions. The intent of applying default meteorological conditions is to gain an understanding

of the worst-case meteorology that could result in a maximum ground-level impact caused by a

particular source.

Effects of exposure to more than one carcinogen or toxicant are also not quantified in risk

assessment (CAPCOA, 1993). For example, compounds may act synergistically where effects

are greater than additive. Compounds may also have antagonistic effects where effects are less

than additive. In these cases, the risk assessment could overestimate or underestimate the

potential risks. 

Although we are not able to quantify uncertainty in this HRA, to help address the

variability in risk assessment, we have provided ranges in our risk assessment results regarding

product content and usage, meteorological data sets, building orientation impacts, and receptor

type. 

E. Summary of the Potential Health Impacts from Automotive Maintenance and

Repair Facilities

This section presents the potential health impacts from four types of analyses that were

performed for AMR facilities. These four analyses include the results from 54 site-specific

HRAs at facilities where site visits were completed. For these 54 facilities, the individual

carcinogenic and non-carcinogenic impacts at near source, residential, and worker receptor

locations were estimated. Secondly, for 13 of these 54 specific facilities, the regional cancer risk

was also evaluated. The third exercise was the estimation of individual receptor potential cancer

and non-cancer health impacts from three representative generic facilities. These generic

facilities were established utilizing the information from the 137 site visits and two surveys that

targeted AMR facilities and product manufacturers. The three generic facilities are modeled

using ten representative off-site meteorological data sets and also were evaluated with default

meteorological conditions to simulate a location where regional meteorological data was not 
VI-12

available. These ten meteorological data sets are the same as the ones used for 13 of the 

site-specific facilities in exercise one and all of the facilities in exercise two. The fourth analysis

uses data from ARB’s ambient monitoring network to estimate the statewide cancer impacts

from the use of Perc, MeCl, and TCE in AMR activities. 

1. Potential Individual Receptor Impacts at Specific Facilities

The ARB staff conducted individual HRAs for 54 of the facilities staff visited and found

to be using Perc, MeCl, or TCE-containing automotive consumer products. These facilities

represent a broad range of AMR facilities and allow for a reasonable approximation of health

impacts statewide. These 54 facilities are a subset of the 137 AMR facilities where ARB staff

has conducted site visits. The other 83 facilities were not assessed because they did not use Perc,

MeCl, or TCE-containing products. See Appendix D for a detailed presentation of the air

dispersion modeling inputs and results for each of the 54 HRAs. Appendix C provides an

example calculation illustrating how the outputs from these models are used to calculate potential

health impacts. 

All 54 HRAs at specific facilities used facility dimensions, emission release

characteristics, operating schedule, product use, and product content information that was

obtained during the site visits. The two air dispersion models that were used during this HRA are

SCREEN3, version 96043, and ISCST3, version 97363. Thirteen of the 54 HRAs were refined

HRAs that used representative off-site meteorological data and were performed using the

ISCST3 air dispersion model. The selection criteria that was used to determine which facilities

would be run with ISCST3 can be found in Appendix F. Forty-one of the HRAs used default

meteorological data and the SCREEN3 air dispersion model. 

Table VI-2 provides an overview of the potential health impacts from the 54 specific

facility HRAs. These 54 facilities are divided into three groups. The first group contains 

29 facilities that use Perc and were run with default meteorology data. The second group was

also run with default meteorology and includes 12 facilities that used products with

multicomponent formulations of Perc and MeCl, or Perc and TCE. The third group has 

13 facilities, all used Perc, and were run with ISCST3 using representative off-site meteorology

data. Table VI-2 also includes columns that reflect the number of facilities in each modeled

group and at each receptor type with potential cancer risks above ten chances per million and one

chance per million. In addition, also noted in Table VI-2 are the number of facilities with

potential non-cancer hazard indices above one. These results are presented for information

purposes only. 

Overall, Table VI-2 shows potential carcinogenic risk ranging from <0.01 to 60 chances

per million. All three receptor types, (the near source, maximum exposed individual resident

(MEIR), and the maximum exposed individual (off-site) worker (MEIW)) show individual

potential cancer risks toward the higher end of this range of potential cancer risk. Regarding

non-cancer impacts from the site visits, the modeling results and hazard index estimates show
VI-13

that it is unlikely for significant acute or chronic non-cancer health effects to result from the

emissions of Perc, MeCl, and TCE from these facilities. In addition, both the chronic and acute

hazard indices are less than 0.3 at near-source, MEIR, and MEIW locations. Generally, hazard

indices less than 1.0 are not considered to be a concern to public health. Tables VI-3 to VI-5

present the individual cancer and non-cancer (acute and chronic) potential health impacts for

each of the 54 specific facilities at the near-source, MEIR, and MEIW locations, respectively. 

Annual average concentrations from representative off-site meteorological data were used

to determine the potential cancer risk and non-cancer hazard indices presented for the 13

facilities using ISCST3 in Table VI-2. Maximum-hourly concentrations were used to determine

the non-cancer acute hazard indices. The methods used to obtain these concentrations are

consistent with current risk assessment guidance (CAPCOA, 1993). 
VI-14

Table VI-2. Overview of the Potential Health Impacts for the Fifty-Four Specific Facilities1

Grouped

Model

Runs 2

(n=54)

Rec.

Type 3

Receptor

Distances 4

(m)

Potential

Cancer

Risk 5

(x/million)

No. 

Fac.6

Above 

10 Per

Million

No.

Fac.6

Above 

1 Per

Million

Range of

Acute 

Hazard

Indices

Range of

Chronic 

Hazard

Indices

No. 

Fac. 

Above

H.I. 

of 1 6,7

Perc 8

 (n=29)

(SCREEN3)

NS 20 to 30 0.08 to 50 12 24 <0.01 to <0.2 <0.01 to <0.3 0

MEIR 6 to 802 0.01 to 22 5 14 <0.01 to <0.2 <0.01 to <0.2 0

MEIW96 to 483 0.02 to 15 1

10 19 <0.01 to <0.211 <0.01 to <0.211 0

Multiple

Component12

Product

(n=12)

(SCREEN3)

NS 20 to 25 1 to 46 8 12 <0.01 to <0.2 <0.01 to <0.3 0

MEIR 20 to 2414 <0.01 to 35 2 8 <0.01 to < 0.08 <0.01 to <0.2 0

MEIW93 to 49 >0.611 to 23 2

10 10 <0.01 to <0.211 <0.01 to <0.311 010

Perc 8

 (n=13)

(ISCST3)

NS 32 to 51 2 to 60 10 13 <0.01 to <0.2 <0.02 to <0.3 0

MEIR 25 to 146 0.05 to 60 6 10 <0.01 to <0.04 <0.01 to <0.3 0

MEIW924 to 151 0.3 to 11 1 11 <0.01 to <0.2 <0.01 to <0.2 0

1. All numbers have been rounded.

2. Modeled facilities are divided into three groups of 29, 12, and 13 facilities. The first group is run using the SCREEN3 model with only 

 Perc-containing products. The second group was run using SCREEN3 with automotive products that contain combination formulations 

 of Perc/MeCl and Perc/TCE. The third group was run using ISCST3 at facilities that use Perc-containing automotive products.

3. Results are presented for three receptor types. 

 NS (near-source) identifies the location closest to the facility where modeled concentrations could be estimated. 

 MEIR (maximum exposed individual resident) represents the residential location that receives the estimated maximum exposure from a 

 facility’s emissions. 

 MEIW (maximum exposed individual (off-site) worker) identifies the off-site industrial or commercial location that receives the estimated 

 maximum exposure from a facility’s emissions. 

4. The distance for the near-source receptor is measured from the center of the volume source. The distance listed for the MEIR and MEIW 

 receptors is the estimated distance away from the outside edge of the building to the residential or worker receptor.

5. Potential cancer risk presented in this column reflect the range of results for each modeled group by receptor type. 

6. These columns reflect the number of facilities in each modeled group and at each receptor type with potential health impacts above ten 

 chances per million, one chance per million, and hazard indices above one. These results are presented for information purposes only.

7. Includes both chronic and acute hazard indices.

8. These facilities use Perc-containing automotive products which show a Perc content range on the MSDS.

9. Where appropriate, the potential cancer risk estimates are adjusted for a working lifetime of 46 years and to allow for an operating schedule 

 at an off-site facility that does not coincide with, or is shorter than, that of the facility being assessed.

10. The number of facilities may be higher than is listed here because the location of some receptors is closer than the minimum modeled 

 distance. We are unable to predict potential pollutant concentrations and health impacts within the minimum modeled distance. When 

 receptors are located closer than the minimum modeled distance, the potential impacts at the minimum modeled distance are used. 

11. The MEIW is located within 20 to 30 meters of the center of the volume source, which is the minimum distance modeled; therefore, the 

 potential health impacts are likely to be greater than those listed here. However, we do not anticipate the impacts to be higher than a 

 hazard index of 1. 

12. These facilities use products with multcomponent formulation of Perc/MeCl or Perc/TCE.
VI-15

a. Potential Health Impacts at the Near Source Location for the Specific 

Facilities

Table VI-3 summarizes the maximum potential cancer and non-cancer health impacts at

each of the 54 specific facilities. The maximum potential health impacts are estimated to occur

at near-source locations. Overall, Table VI-3 shows potential carcinogenic risk ranging from

0.05 to 60 chances per million. Non-cancer acute and chronic hazard indices are less than 0.3 at

near-source location. Generally, hazard indices less than 1.0 are not considered to be a concern

to public health.

For these 54 facilities, we selected a minimum receptor distance of 20 to 51 meters from

the center of the volume source or building to define a near-source location. The reason the

minimum modeled distance varies by facility is because the air dispersion models must allow for

the building dimensions or footprint. The purpose of estimating the potential health impacts at a

near-source location is to illustrate what the potential health impacts can be if a receptor was

located close to the facilities which were assessed, rather than having an increased “buffer”

distance between the receptor location and the edge of the building. During the 137 site visits,

ARB staff observed that receptors are present within 51 meters at 87 of the AMR facilities. For a

breakdown of the number of facilities with residential and worker receptors within 20, 30, 50 and

100 meters that were observed during the site visits see Table V-12.
VI-16

Table VI-3. Summary of the Specific Facility Near-Source 

Potential Health Impacts 1,2

Facility

(n=54)

Facility Type Individual Cancer

Risk (per million)

Acute Hazard

Index

Chronic Hazard

Index

Group A = Perc-Using Facilities Modeled with SCREEN3 (N=29)

E 3 Service Station 2.0 to 2.9 <0.06 <0.02

H 3 Fleet 0.3 to 0.4 <0.01 <0.01

L 3 Service Station 4.7 to 6.8 <0.2 <0.04

N Dealership 3.7 <0.01 <0.02

Q 3 General Automotive 27 to 39 <0.2 <0.2

R 3 General Automotive 35 to 50 <0.05 <0.3

V Brake Shop 0.5 <0.01 <0.01

A-13 3 General Automotive 0.08 to 0.1 <0.01 <0.01

A-14 3 General Automotive 0.6 to 0.9 <0.03 <0.01

A-15 3 General Automotive 2.0 to 2.7 <0.04 <0.02

A-163 General Automotive 4.0 to 5.9 <0.02 <0.03

A-21 3 Brake Shop 3.7 to 5.0 <0.04 <0.03

A-29 3 Fleet 24 to 35 <0.05 <0.2

A-30 3 Fleet 3.1 to 10 <0.05 <0.06

A-31 3 General Automotive 11 to 16 <0.02 <0.08

A-32 3 General Automotive 0.6 to 0.9 <0.03 <0.01

A-35 3 Brake Shop 3.9 to 5.6 <0.2 <0.03

A-36 3 Dealership 22 to 31 <0.04 <0.2

A-50 3 General Automotive 5.8 to 8.4 <0.08 <0.05

A-51 3 General Automotive 4.7 to 5.2 <0.2 <0.03

A-54 3 General Automotive 8.9 to 13 <0.09 <0.07

A-73 3 General Automotive 14 to 16 <0.04 <0.08

A-84 General Automotive 23 <0.09 <0.2

A-87 3 Dealership 11 to 19 <0.02 <0.1
VI-17

Table VI-3. Summary of the Specific Facility Near-Source 

Potential Health Impacts (continued) 1,2

Facility

(n=54)

Facility Type Individual Cancer

Risk (per million)

Acute Hazard

Index

Chronic Hazard

Index

Group A = Perc-Using Facilities Modeled with SCREEN3 (N=29) (continued)

A-88 3 General Automotive 8.9 to 22 <0.2 <0.2

A-89 3 General Automotive 4.6 to 6.6 <0.01 <0.04

A-90 3 Service Station 6.0 to 8.7 <0.3 <0.05

A-93 3 General Automotive 10 to 15 <0.08 <0.08

A-94 3 Service Station 2.0 to 2.9 <0.04 <0.02

Group B = Multicomponent-Using Facilities Modeled with SCREEN3 4 (N=12)

D Service Station 18 <0.09 <0.09

G Fleet 22 <0.05 <0.2

M Dealership 46 <0.1 <0.3

S Brake Shop 12 <0.02 <0.06

A-20 General Automotive 27 <0.04 <0.2

A-39 General Automotive 9.7 <0.01 <0.04

A-49 General Automotive 11 <0.09 <0.06

A-63 General Automotive 1.0 <0.04 <0.01

A-71 General Automotive 1.5 <0.06 <0.01

A-72 General Automotive 2.9 <0.2 <0.02

A-82 General Automotive 20 <0.03 <0.1

A-85 General Automotive 43 <0.2 <0.3

Group C = Perc-Using Facilities Modeled with ISCST3 (N=13)

A-07 3 General Automotive 13 to 19 <0.04 <0.1

A-08 3 General Automotive 29 to 41 <0.02 <0.3

A-09 3 General Automotive 41 to 60 <0.02 <0.3

A-28 3 Fleet 12 to 18 <0.03 <0.09

A-52 3 General Automotive 9.9 to 11 <0.05 <0.06
VI-18

Table VI-3. Summary of the Specific Facility Near-Source 

Potential Health Impacts (continued) 1,2

Facility

(n=54)

Facility Type Individual Cancer

Risk (per million)

Acute Hazard

Index

Chronic Hazard

Index

Group C = Perc-Using Facilities Modeled with ISCST3 (N=13) (continued)

A-83 3 General Automotive 12 to 18 <0.02 <0.09

A-86 3 Dealership 8.0 to 13 <0.01 <0.07

A-92 3 Service Station 3.2 to 4.7 <0.05 <0.03

I 3 Fleet 11 to 16 <0.03 <0.08

O 3 General Automotive 4.5 to 6.6 <0.2 <0.04

P 3 Brake Shop 2.3 to 3.3 <0.01 <0.02

T General Automotive 15 <0.02 <0.08

U 3 General Automotive 19 to 28 <0.02 <0.2

 1. Near-source is defined as the modeled minimum receptor distance of 20 to 51 meters from the building center, or ranging from 

 2 to 40 meters away from the outside edge of the building.

 2. All numbers have been rounded.

 3. These facilities use a Perc-containing automotive products which shows a Perc-content range on the Material Safety Data Sheet 

 (MSDS); therefore, a range is presented for the potential cancer risk.

 4. These facilities use products with multicomponent formulations of Perc/MeCl or Perc/TCE.

b. Potential Health Impacts at the MEIR for the Specific Facilities 

Table VI-4 summarizes the potential cancer and non-cancer health impacts at the

maximum exposed individual resident (MEIR). The MEIR is defined as the residential receptor

location that receives the estimated maximum exposure from a facility’s emissions relative to

other residential locations. Overall, Table VI-4 shows the MEIR potential carcinogenic risk

range from <0.01 to 60 chances per million. Non-cancer acute and chronic hazard indices are

less than 0.3 at the MEIR location. Generally, hazard indices less than 1.0 are not considered to

be a concern to public health. An example calculation is presented in Appendix C illustrating

how a facility’s potential health impacts were assessed. This example shows emission

calculations, steps through the air dispersion modeling, and concludes with a calculation of

potential health impacts. 

A contributing factor to any decrease in potential risk at the MEIR is the increased

“buffer” distance created by the facility fence line or the location of the nearest resident when

compared to the near-source location. The distance to the MEIR at the specific facilities was

estimated to range from approximately 6 to 2414 meters.
VI-19

Table VI-4. Summary of the Potential Health Impacts at the Maximum Exposed

 Individual Resident (MEIR) from the Specific Facilities 1

Facility

(n=54)

Facility Type Receptor

Distance 2

(meters) 

Individual

Cancer Risk

(per million)

Acute Hazard

Index

Chronic Hazard

Index

Group A = Perc-Using Facilities Modeled with SCREEN3 (N=29)

E 3 Service Station 801 0.01 to 0.02 <0.01 <0.01

H 3 Fleet 802 <0.01 to 0.01 <0.01 <0.01

L 3 Service Station 232 0.2 to 0.3 <0.01 <0.01

N Dealership 400 0.07 <0.01 <0.01

Q 3 General Automotive 76 7.9 to 11 <0.06 <0.06

R 3 General Automotive 46 15 to 22 <0.02 <0.2

V 4 Brake Shop 6 >0.5 <0.015 <0.015

A-13 3 General Automotive 73 0.01 to 0.02 <0.01 <0.01

A-14 3 General Automotive 107 <0.1 <0.01 <0.01

A-15 3 General Automotive 76 0.4 to 0.5 <0.01 <0.01

A-16 3 General Automotive 305 0.08 to 0.1 <0.01 <0.01

A-21 3 Brake Shop 114 0.4 to 0.5 <0.01 <0.01

A-29 3 Fleet 152 3.3 to 4.8 <0.01 <0.03

A-30 3 Fleet 483 0.1 to 0.4 <0.01 <0.01

A-31 3 General Automotive 229 0.3 to 0.5 <0.01 <0.01

A-32 3 General Automotive 137 0.04 to 0.06 <0.01 <0.01

A-35 3 Brake Shop 152 0.3 to 0.4 <0.02 <0.01

A-36 3 Dealership 152 1.6 to 2.4 <0.01 <0.02

A-50 3 General Automotive 15 5.8 to 8.4 <0.08 <0.05

A-51 3 General Automotive 23 3.5 to 3.8 <0.2 <0.02

A-54 3 General Automotive 38 3.7 to 5.4 <0.05 <0.03

A-73 3 General Automotive 322 0.2 to 0.3 <0.01 <0.01

A-84 General Automotive 38 10 <0.05 <0.05
VI-20

Table VI-4. Summary of the Potential Health Impacts at the Maximum Exposed

 Individual Resident (MEIR) from the Specific Facilities (continued) 1

Facility

(n=54)

Facility Type Receptor

Distance 2

(meters) 

Individual

Cancer Risk

(per million)

Acute Hazard

Index

Chronic Hazard

Index

Group A = Perc-Using Facilities Modeled with SCREEN3 (N=29) (continued)

A-87 3 Dealership 152 0.9 to 1.5 <0.01 <0.01

A-88 3 General Automotive 12 8.9 to 22 <0.2 <0.2

A-89 3 General Automotive 76 0.7 to 1.1 <0.01 <0.01

A-90 3,4 Service Station 14 >6.0 to >8.7 <0.35 <0.055

A-93 3,4 General Automotive 8 >10 to >15 <0.085 <0.085

A-94 3 Service Station 23 1.4 to 2.1 <0.04 <0.02

Group B = Multicomponent-Using Facilities Modeled with SCREEN3 6 (N=12)

D Service Station 152 1.6 <0.01 <0.01

G Fleet 398 1.2 <0.01 <0.01

M Dealership 20 35 <0.08 <0.2

S Brake Shop 460 0.2 <0.01 <0.01

A-20 General Automotive 46 8.1 <0.02 <0.04

A-39 General Automotive 46 3.8 <0.01 <0.02

A-49 General Automotive 30 5.6 <0.06 <0.03

A-63 General Automotive 2414 <0.01 <0.01 <0.01

A-71 General Automotive 30 0.8 <0.04 <0.01

A-72 General Automotive 53 0.8 <0.05 <0.01

A-82 General Automotive 37 8.9 <0.02 <0.05

A-85 General Automotive 30 23 <0.08 <0.2

Group C = Perc-Using Facilities Modeled with ISCST3 (N=13)

A-07 3 General Automotive 27 13 to 19 <0.03 <0.1

A-08 3 General Automotive 27 7.8 to 11 <0.02 <0.06

A-09 3 General Automotive 25 41 to 60 <0.02 <0.3

A-28 3 Fleet 83 0.9 to 1.4 <0.01 <0.01
VI-21

Table VI-4. Summary of the Potential Health Impacts at the Maximum Exposed

 Individual Resident (MEIR) from the Specific Facilities (continued) 1

Facility

(n=54)

Facility Type Receptor

Distance 2

(meters) 

Individual

Cancer Risk

(per million)

Acute Hazard

Index

Chronic Hazard

Index

Group C = Perc-Using Facilities Modeled with ISCST3 (N=13) (continued)

A-52 3 General Automotive 42 2.8 to 3.0 <0.04 <0.02

A-83 3 General Automotive 30 9.7 to 14 <0.02 <0.07

A-86 3 Dealership 141 1.3 to 2.2 <0.01 <0.02

A-92 3 Service Station 54 0.3 to 0.5 <0.02 <0.01

I 3 Fleet 146 1.8 to 2.6 <0.01 <0.02

O 3 General Automotive 92 0.05 to 0.07 <0.04 <0.01

P 3 Brake Shop 37 0.2 to 0.3 <0.01 <0.01

T General Automotive 27 13 <0.01 <0.07

U 3 General Automotive 27 19 to 28 <0.02 <0.2

 1. All numbers have been rounded.

 2. The distance listed here is the estimated distance away from the outside edge of the building to the MEIR. 

 3. These facilities use a Perc-containing brake cleaner which shows a Perc-content range on the Material Safety Data Sheet (MSDS); therefore, 

 a range is presented for the potential cancer risk.

 4. The MEIR is located closer than 20 meters to the center of the volume source, which is the minimum distance modeled; therefore, 

 the potential health impacts are likely to be greater than those listed here. The impacts shown here are at the near-source location of 20 to 

 51 meters.

5. The MEIR is located within 20 to 30 meters of the center of the volume source, which is the minimum distance modeled; therefore, the 

 potential health impacts are likely to be greater than those listed here. However, we do not anticipate the impacts to be higher than a 

 hazard index of 1. 

6. These facilities use products with multicomponent formulations of Perc/MeCl or Perc/TCE.

c. Potential Health Impacts at the MEIW for the Specific Facilities

Table VI-5 summarizes the potential cancer and non-cancer health impacts at the

maximum exposed individual (off-site) worker (MEIW). The MEIW is defined as the off-site

industrial or commercial location that receives the estimated maximum exposure from a facility’s

emissions relative to other industrial or commercial locations. 

Overall, Table VI-5 shows the MEIW potential carcinogenic risk range is from 0.02 to 23

chances per million. Non-cancer acute and chronic hazard indices are less than 0.3 at 

near-source location. Generally, hazard indices less than 1.0 are not considered to be a concern 
VI-22

to public health. An example calculation is presented in Appendix C that illustrates how a

facility’s potential health impacts were assessed. This example shows emission calculations,

steps through the air dispersion modeling, and concludes with a calculation of potential health

impacts. 

The distance to the MEIW at these facilities was estimated to range from 3 to 483 meters. 

Using guidance from OEHHA, the exposure period of an off-site worker was adjusted to allow

for a shorter working lifetime and a shorter operating schedule. This first adjustment is made to

allow for a shorter working lifetime, 46 years, rather than a 70-year exposure lifetime which is

assumed for residential exposure. The second adjustment which allows for operating schedules

is appropriate only when the operating schedule of the off-site facility does not coincide with, or

is shorter than, that of the facility being assessed (OEHHA, 1997).

Table VI-5. Summary of the Potential Health Impacts at the Maximum Exposed

Individual (Off-site) Worker (MEIW) from the Specific Facilities 1

Facility

(n=54)

Facility Type Receptor

Distance 2

(meters) 

Individual

Cancer Risk 3

(per million)

Acute Hazard

Index

Chronic Hazard

Index

Group A = Perc-Using Facilities Modeled with SCREEN3 (N=29)

E 4 Service Station 36 0.4 to 0.6 <0.03 <0.01

H 4 Fleet 302 0.02 to 0.03 <0.01 <0.01

L 4 Service Station 27 1.4 to 2.0 <0.08 <0.03

N Dealership 110 0.3 <0.01 <0.01

Q 4 General Automotive 61 5.3 to 7.7 <0.07 <0.07

R 4 General Automotive 30 10 to 15 <0.03 <0.2

V 5 Brake Shop 18 0.2 <0.01 <0.01

A-13 4 General Automotive 18 0.03 to 0.04 <0.01 <0.01

A-14 4,5 General Automotive 6 >0.3 to >0.5 <0.03 6 <0.01 6

A-15 4 General Automotive 30 0.5 to 0.7 <0.03 <0.01

A-16 4 General Automotive 30 0.8 to 1.2 <0.01 <0.02

A-21 4 Brake Shop 12 1.4 to 1.9 <0.03 <0.03

A-29 4 Fleet 322 0.3 to 0.4 <0.01 <0.01
VI-23

Table VI-5. Summary of the Potential Health Impacts at the Maximum Exposed

Individual (Off-site) Worker (MEIW) from the Specific Facilities (continued) 1

Facility

(n=54)

Facility Type Receptor

Distance 2

(meters) 

Individual

Cancer Risk 3

(per million)

Acute Hazard

Index

Chronic Hazard

Index

Group A = Perc-Using Facilities Modeled with SCREEN3 (N=29) (continued)

A-30 4 Fleet 483 0.03 to 0.09 <0.01 <0.01

A-31 4,5 General Automotive 6 >4.9 to >7.1 <0.02 6 <0.08 6

A-32 4 General Automotive 17 0.3 to 0.5 <0.03 <0.01

A-35 4 Brake Shop 15 1.7 to 2.5 <0.2 <0.03

A-36 4 Dealership 76 2.2 to 3.1 <0.02 <0.04

A-50 4 General Automotive 15 2.9 to 4.1 <0.08 <0.05

A-51 4,5 General Automotive 6 >2.0 to >2.2 <0.2 6 <0.03 6

A-54 4,5 General Automotive 15 >4.3 to >6.2 <0.09 6 <0.07 6

A-73 4 General Automotive 15 7.7 to 8.8 <0.04 <0.08

A-84 5 General Automotive 9 >7.9 <0.09 6 <0.2 6

A-87 4 Dealership 46 2.1 to 3.5 <0.01 <0.04

A-88 4 General Automotive 23 2.9 to 7.2 <0.2 <0.08

A-89 4 General Automotive 24 1.4 to 2.0 <0.01 <0.02

A-90 4,5 Service Station 15 >3.1 to >4.4 <0.3 6 <0.05 6

A-93 4 General Automotive 30 2.3 to 3.3 <0.05 <0.04

A-94 4,5 Service Station 9 >1.1 to >1.6 <0.04 6 <0.02 6

Group B = Multicomponent-Using Facilities Modeled with SCREEN3 7 (N=12)

D Service Station 32 3.7 <0.04 <0.04

G Fleet 28 8.7 <0.03 <0.08

M Dealership 15 23 <0.09 <0.2

S Brake Shop 41 2.8 <0.01 <0.03

A-20 General Automotive 49 3.3 <0.02 <0.04

A-39 General Automotive 23 2.6 <0.01 <0.03

A-49 5 General Automotive 6 >5.8 <0.09 6 <0.06 6

A-63 5 General Automotive 3 >0.6 <0.04 6 <0.01 6
VI-24

Table VI-5. Summary of the Potential Health Impacts at the Maximum Exposed

Individual (Off-site) Worker (MEIW) from the Specific Facilities (continued) 1

Facility

(n=54)

Facility Type Receptor

Distance 2

(meters) 

Individual

Cancer Risk 3

(per million)

Acute Hazard

Index

Chronic Hazard

Index

Group B = Multicomponent-Using Facilities Modeled with SCREEN3 7 (N=12) (continued)

A-715 General Automotive 15 >0.8 <0.06 6 <0.01 6

A-72 General Automotive 21 1.1 <0.09 <0.01

A-82 General Automotive 37 3.7 <0.02 <0.05

A-85 5 General Automotive 8 >21 <0.2 6 <0.3 6

Group C = Perc-Using Facilities Modeled with ISCST3 (N=13)

A-07 4 General Automotive 46 2.3 to 3.4 <0.02 <0.04

A-08 4 General Automotive 27 7.9 to 11 <0.02 <0.2

A-09 4 General Automotive 25 4.6 to 6.7 <0.02 <0.08

A-28 4 Fleet 122 0.3 to 0.4 <0.01 <0.02

A-52 4 General Automotive 28 4.5 to 4.9 <0.03 <0.06

A-83 4 General Automotive 27 4.3 to 6.2 <0.02 <0.07

A-86 4 Dealership 151 0.3 to 0.6 <0.01 <0.01

A-92 4 Service Station 28 1.4 to 2.0 <0.05 <0.02

I 4 Fleet 84 1.1 to 1.6 <0.02 <0.03

O 4 General Automotive 24 2.3 to 3.3 <0.2 <0.03

P 4 Brake Shop 27 0.7 to 1.0 <0.01 <0.02

T General Automotive 27 5.7 <0.01 <0.07

U 4 General Automotive 27 2.9 to 4.2 <0.01 <0.05

1. All numbers have been rounded.

2. The distance listed here is the estimated distance from the outside edge of the building to the MEIW.

3. Where appropriate, the potential risk estimates are adjusted for a working lifetime of 46 years and to allow for an operating schedule at an 

 off-site facility that does not coincide with, or is shorter than, that of the facility being assessed.

4. These facilities use a Perc-containing brake cleaner which shows a Perc-content range on the Material Safety Data Sheet (MSDS); therefore, 

 a range is presented for the potential cancer risk.

5. The MEIW is located closer than 20 to 51 meters to the center of the volume source, which is the minimum distance modeled; therefore, the 

 potential health impacts are likely to be greater than those listed here. The impacts shown here are at the near-source location of 20 to 51 

 meters. 

6. The MEIW is located within 20 to 30 meters of the center of the volume source, which is the minimum distance modeled; therefore, the 

 potential health impacts are likely to be greater than those listed here. However, we do not anticipate the impacts to be higher than a 

 hazard index of 1.

7. These facilities use products with multicomponent formulations of Perc/MeCl or Perc/TCE.
VI-25

2. Regional Cancer Risk from Specific Facilities

For the 13 specific facilities that were modeled using representative off-site

meteorological data and the ISCST3 model, ARB staff has also estimated the potential regional

cancer risk on the population surrounding each facility. Regional population exposure to Perc,

MeCl, and TCE concentrations from each of the 13 specific facilities was estimated by spatially

matching regional population census data collected from the Department of Finance (DOF) and

the ISCST3 modeling results. To deal with limitations in the population data resolution,

estimates of the high and low ranges of concentration were utilized in this analysis. These

concentration estimates result in high and low potential cancer risk estimates. See Appendix D

for a detailed presentation of the regional concentrations from the 13 specific facilities. 

Appendix C provides a more detailed discussion of the methodology and an example calculation

that converts the modeled regional concentrations found in Appendix D to cancer risk estimates. 

Table VI-6 summarizes the data in Appendix D by providing, for each of the 13 specific

facilities, the range of annual average concentrations anticipated over a one-kilometer grid-cell

centered on each facility. This table also provides the range of corresponding potential cancer

risk, the average one-kilometer grid-cell population, and the near source, MEIR, and MEIW

individual potential cancer risk. The lower end of the concentration range at each facility

provides an estimate of the average concentration that all of the receptors are exposed to within

the one-kilometer grid-cell. The upper end of the concentration range illustrates the modeled

maximum annual concentration that is anticipated near each facility where high concentration

gradients may exist. Due to the resolution of the census data, we are unable to estimate the

population exposed to the upper end of the concentration range; however, some of the populous

are exposed at or near these concentrations due to the proximity of adjacent receptors as

evidenced in the MEIR and MEIW analyses. 

Overall, Table VI-6 shows that the populous around the 13 specific facilities are exposed

to a range of potential cancer risk of 0.006 to 60 chances per million. The range of individual

cancer risk estimates are also included in Table VI-6 to put the one-kilometer grid-cell

concentrations and risk into perspective with the individual cancer risk shown in 

Tables VI-2 to VI-5. As stated above, the near source, MEIR, and MEIW locations are indicative

of the upper range of the concentrations and potential cancer risk that is estimated within onekilometer of each of the 13 facilities. 

As mentioned prior, the spatial resolution of the population data is a limiting factor to this

analysis. That is, model results indicate that ambient air concentrations rapidly decrease at

distances farther than 100 meters from each facility or one-tenth of a grid-cell. Thus, the

reported average concentration experienced within the central one-kilometer square grid-cell is

lower that the average concentration experienced within a 100-meter radius of each facility. 

With the utilized population data and analysis tools, we are unable to quantify the populous

living within 100 meters from each source, that will generally experience the higher

concentrations. Use of more highly resolved population data, land-use data, and parcel maps
VI-26

could refine such estimates. Improvements in the availability of digitized census information

down to the block level (e.g., 70 to 100 persons) in a Geographic Information System (GIS)

format is key to improving the estimation of regional or near field population exposure estimates. 

In addition to the digitized block level census data, digitized parcel or land use data and high

resolution street maps in a GIS format are other key requirements for improving these estimates. 

Table VI-6. Summary of the Potential Regional Population and Individual Cancer 

Risk for the Thirteen Specific Facilities Modeled with ISCST3 1,2

Facility

(n=13)

Range Of Facility 3

Specific Annual

Average Conc. In

 One-Kilometer 

Grid-Cell

(ug/m3)

Range Of

Cancer Risk In

One-Kilometer

Grid-Cell

(chances per

million)

1998

Average

Population

Within

 One-Kilometer

Grid-Cell 

Individual Cancer Risk 

 (chances per million)

Near

 Source

Maximum

Exposed

Resident

Maximum

Exposed

Worker 4

A-07 4.7 E-3 to 3.3 0.03 to 19 5,843 19 19 3.4

A-08 9.3 E-3 to 7.0 0.05 to 41 5,628 41 11 11

A-09 6.4 E-2 to 10.1 0.4 to 60 2,155 60 60 6.7

A-28 1.0 E-2 to 3.0 0.06 to 18 2,501 18 1.4 0.4

A-52 3.3 E-3 to 1.8 0.02 to 11 3,971 11 3.0 4.9

A-83 2.5 E-2 to 3.0 0.1 to 18 732 18 14 6.2

A-86 9.1 E-3 to 2.2 0.05 to 13 1,845 13 2.2 0.6

A-92 9.8 E-4 to 0.8 0.006 to 4.7 3,399 4.7 0.5 2.0

I 5.8 E-2 to 2.7 0.3 to 16 1,408 16 2.6 1.6

O 1.0 E-2 to 1.1 0.06 to 6.6 1,930 6.6 0.07 3.3

P 4.6 E-3 to 0.6 0.03 to 3.3 2,369 3.3 0.3 1.0

T 4.2 E-3 to 2.5 0.02 to 15 6,603 15 13 5.7

U 2.4 E-2 to 4.7 0.1 to 28 3,683 28 28 4.2

1. All numbers have been rounded.

2. The higher end of the Perc-content range was used for facilities that use Perc-containing automotive products that show a Perc-content 

 range on the Material Safety Data Sheet (MSDS).

3. Column entries derived by multiplying the unit emission rate concentrations presented in Appendix C by the upper Perc-content range 

 facility specific emissions rate presented in Table D-17 of Appendix D. 

4. Where appropriate, the potential risk estimates are adjusted for a working lifetime of 46 years and to allow for an operating schedule at an 

 off-site facility that does not coincide with, or is shorter than, that of the facility being assessed.

 
VI-27

3. Potential Individual Health Impacts from Generic Facilities

In addition to assessing the potential health impacts at the 54 specific facilities, ARB staff

also conducted an HRA for three representative generic facilities (G-01, G-02, and G-03). These

generic facilities were established utilizing the information from the 137 site visits, discussions

with industry representatives, and two surveys that targeted AMR facilities and products

manufacturers. The characteristics of the generic facilities represent the range of characteristics

exhibited by the research of actual facilities and allow for the reasonable approximation of health

impacts statewide.

 The generic facility assessments were run with the ISCST3 air dispersion model and the

resulting concentrations were used to estimate individual receptor potential cancer and 

non-cancer health impacts. The three generic facilities are modeled using ten representative 

off-site meteorological data sets and also were evaluated with default meteorological conditions

to simulate a location where regional meteorological data was not available. These ten

meteorological data sets are the same as those used for 13 of the site-specific facilities (group c)

in exercise one and all facilities in exercise two. See Appendix F for a discussion outlining how

the generic facilities were defined and Appendix D for a list of the meteorologic data sets. 

Appendix C provides an example calculation illustrating how modeled concentrations are used to

estimate potential cancer and non-cancer health impacts. 

In addition to evaluating these generic facilities for the use of brake cleaning products,

estimates of the potential health impacts from the use of engine degreasers, carburetor-choke 

cleaner, and general degreasers were also completed. Section four of Appendix D includes a

detailed presentation of the modeled concentrations from the three generic facilities using all four

types of automotive consumer products. Appendix F outlines the emissions, usage, and content

assumptions that were used for the three other product categories. The inputs for the generic

modeling are listed in Appendix D. 

Tables VI-7 and VI-8 provide an overview of the potential health impacts from the three

generic facility HRAs using Perc-containing brake cleaners. These tables show the range of

cancer and non-cancer health impacts at the minimum modeled distance using representative 

off-site meteorological data and default conditions, respectively. We are summarizing the health

impacts from Perc-only brake products in Tables VI-7 and VI-8, rather than other formulations,

because the health impacts of this formulation exhibit the highest potential health impacts. 

The purpose of showing these health impacts at these receptor distances is because

receptors do reside in close proximity to AMR facilities. During the 137 site visits, ARB staff

observed that receptors are present within 51 meters at 87 of the AMR facilities. For a

breakdown of the number of facilities with residential and worker receptors within 20, 30, 50 and

100 meters that were observed during the site visits see Table V-12.
VI-28

Table VI-7 shows that the potential carcinogenic risk for a near source, residential

receptor over all ten representative off-site meteorological sets range from approximately 

18 to 64 chances per million at the smallest facility (G-01). The middle facility (G-02) potential 

 near-source, residential receptor cancer risk ranges from 28 to 110 chances per million and at the

largest facility (G-03), the near-source, residential receptor cancer risk ranges from 15 to 50

chances per million. Note, however, that modeled concentrations and potential risk could be

either higher or lower depending on the actual building orientation and regional location. See

Appendix D for a sensitivity analysis discussion illustrating the effects of building orientation

under default meteorological conditions. 

Table VI-8 which presents the results using default meteorology, shows the facility G-01

near-source, residential receptor cancer risk ranges from 61 to 89 chances per million, facility 

G-02 near-source, residential receptor cancer risk ranges from 86 to 125 chances per million, and

at facility G-03, the residential receptor cancer risk ranges from 38 to 56 chances per million. 

Regarding non-cancer impacts from the generic facilities, the modeling results and hazard

index estimates in Tables VI-7 and VI-8 show that it is unlikely for significant acute or chronic

non-cancer health effects to result from the emissions of Perc-containing brake cleaners. Both the

chronic and acute hazard indices are less than 0.6 at the minimum modeled distance. Generally,

hazard indices less than 1.0 are not considered to be a concern to public health.

Table VI-7. Overview of the Potential Health Impacts for the 

Three Generic Facilities Using Off-site Representative Meteorology 1

Generic

Facilities

Rec.

Type 2

Distance

From

Building

Center 3

(m)

Off-site Representative Meteorology 4

Range of Cancer Risk 5

(x/million)

Range of Acute 

Hazard Indices

Range of Chronic 

Hazard Indices

G-01

Resident 20 18 to 64 <0.05 to <0.09 <0.09 to <0.4

Worker 7.6 to 27

G-02

Resident 20 28 to 110 <0.04 to <0.08 <0.2 to <0.6

Worker 12 to 47

G-03

Resident 30 15 to 50 <0.02 to <0.03 <0.08 to <0.3

Worker 6.3 to 21

 1. All numbers have been rounded.

 2. Where appropriate, the potential risk estimates are adjusted for a working lifetime of 46 years and to allow for an operating schedule at an 

 off-site facility that does not coincide with, or is shorter than, that of the facility being assessed.

 3. The distance listed is the estimated distance from the center of the facility to the receptor.

 4. Annual average and maximum hourly concentrations for all ten meteorological sets are listed in Appendix D.

 5. The range reflects two common Perc concentrations observed in specific facility modeling.
VI-29

Table VI-8. Overview of the Potential Health Impacts for the 

Three Generic Facilities Using Default Meteorology 1

Generic

Facilities

Rec.

Type 2

Distance

From

Building

Edge 3

(m)

Default Conditions 4

Range of Cancer Risk 5

(x/million)

Range of Acute 

Hazard Indices

Range of Chronic 

Hazard Indices

G-01

Resident 20 61 to 89 <0.06 to <0.08 <0.3 to <0.5

Worker 26 to 38

G-02

Resident 20 86 to 125 <0.06 to <0.08 <0.5 to <0.6

Worker 36 to 53

G-03

Resident 30 38 to 56 <0.03 to <0.04 <0.3 to <0.4

Worker 16 to 24

 1. All numbers have been rounded.

 2. Where appropriate, the potential risk estimates are adjusted for a working lifetime of 46 years and to allow for an operating schedule at an 

 off-site facility that does not coincide with, or is shorter than, that of the facility being assessed.

 3. The distance listed is the estimated distance from the edge of the facility to the receptor.

 4. Meteorological conditions were taken from the SCREEN3 model. See Appendix D for more modeling information.

 5. The range reflects two common Perc concentrations observed in specific facility modeling.

Tables VI-9 to VI-11 present the individual cancer and non-cancer (acute and chronic)

potential health impacts for the three generic facilities using three specific meteorological data

sets that span the range of modeled concentrations. These three regional meteorological data sets

are for Oakland, Burbank, and Anaheim. These three locations provide a lower, medium, and

higher concentrations, respectively. To select these three meteorological data sets, we evaluated

the annual concentrations from all ten meteorological data sets. All concentrations and resulting

potential health impacts are provided for all ten meteorological data sets in Appendix D. Table

VI-12 presents the potential health impacts for the three generic facilities using default

meteorological conditions. 

Tables VI-9 to VI-12 also summarize the maximum potential health impacts from the

three generic facilities using all four categories of automotive consumer products under the four

different meteorological data sets described above. As described above, and in more detail in

Chapter 4, the four product categories are brake cleaners, carburetor-choke cleaners, engine

degreasers, and general degreasers. In addition to including the total maximum potential health

impacts from the four different product categories, we also are presenting four constituent 
VI-30

formulations of brake cleaning products. The four brake cleaner constituent formulations used for

this HRA are a Perc-only product (94%), Perc/MeCl (55%/25%), Perc/MeCl/TCE

(40%/30%/20%), and Perc/TCE (55%/43%). These are identified in Tables VI-9 to VI-12 as

formulations A, B, C, and D. Formulations A’, B’, C’, and D’ include the brake cleaner that is

identified by the same letter (e.g., A’ corresponds to A) and include the three other product

categories. 

Overall, Tables VI-9 to VI-12 show that none of the generic facilities, regardless of the

brake cleaner formulation or the inclusion of all four product categories, present hazard indices

greater than 0.6. Generally, hazard indices less than 1.0 are not considered to be a concern to

public health.

Table VI-9 lists the results from generic facilities using the Anaheim meteorological data,

brake cleaners of various formulations, and include the results from the use of all four product

categories. Table VI-9 shows potential carcinogenic risk for a potential near-source, residential

receptor range from approximately 35 to 68 chances per million at the smallest facility (G-01). 

The middle facility (G-02) potential near-source, residential receptor cancer risk ranges from

61 to 112 chances per million and at the largest facility (G-03), the near source, residential

receptor cancer risk ranges from 28 to 52 chances per million.

Table VI-10 lists the results from generic facilities using the Burbank meteorological data,

brake cleaners of various formulations, and include the results from the use of all four product

categories. Table VI-10 shows potential carcinogenic risk for a potential near-source, residential

receptor range from approximately 26 to 52 chances per million at the smallest facility (G-01). 

The middle facility (G-02) potential near-source, residential receptor cancer risk ranges from

47 to 88 chances per million and at the largest facility (G-03), the near source, residential receptor

cancer risk ranges from 19 to 38 chances per million.

Table VI-11 lists the results from generic facilities using the Oakland meteorological data,

brake cleaners of various formulations, and include the results from the use of all four product

categories. Table VI-11 shows potential carcinogenic risk for a potential near-source, residential

receptor range from approximately 15 to 31 chances per million at the smallest facility (G-01). 

The middle facility (G-02) potential near-source, residential receptor cancer risk ranges from

23 to 45 chances per million and at the largest facility (G-03), the near source, residential receptor

cancer risk ranges from 12 to 23 chances per million.

Table VI-12 lists the results from generic facilities using default meteorological data,

brake cleaners of various formulations, and include the results from the use of all four product

categories. Table VI-12 shows potential carcinogenic impacts for a potential near-source,

residential receptor range from approximately 49 to 100 chances per million at the smallest

facility (G-01). The middle facility (G-02) potential near-source, residential receptor cancer risk

ranges from 69 to 130 chances per million and at the largest facility (G-03), the near source,

residential receptor cancer risk ranges from 31 to 59 chances per million.
VI-31

Tables VI-13 and VI-14 itemize the individual product and total potential risk

contributions from carburetor-choke cleaners, engine degreasers, and general degreasers under an

average meteorological data set and under default conditions, respectively. The average

meteorological data set was derived by averaging the modeled concentrations at each receptor

distance for all ten representative off-site meteorological sets listed in Appendix D. See

Appendix D for a detailed presentation of all modeling results. The emissions, use, and

formulation assumptions used for the three product categories are discussed in Appendix F. 

Table VI-13 shows the individual product and total potential near-source, residential

cancer risk for all three generic facilities using the average meteorological data for the three

product categories (i.e., carburetor-choke cleaners, engine degreasers, and general degreasers)

range from 1.2 to 4.4 chances per million. The non-cancer hazard indices for both acute and

chronic impacts are less than 0.1. The results from Table VI-13 are used with all regional

meteorological data sets and are included in Tables VI-9 to VI-11 for the A’, B’, C’, and D’

formulation potential health impacts.

Table VI-14 shows the individual product and total potential near-source, residential

cancer risk at all three generic facilities using the default meteorological data for the three product

categories (i.e., carburetor-choke cleaners, engine degreasers, and general degreasers) ranges from

2.3 to 11 chances per million. The non-cancer hazard indices for both acute and chronic impacts

are less than 0.1. The results presented in Table VI-14 are used with default meteorological

conditions; therefore, they are included in Table VI-12 for the A’, B’, C’, and D’ formulation

potential health impacts.
VI-32

Table VI-9. Summary of the Potential Health Impacts at Various Distances for Three Generic Facilities Using Four Different Brake

Product Formulations and Four Product Categories at the Meteorological Site Yielding the Highest Concentrations (Anaheim) 1,2

Fac.

Type Formulations

Potential Cancer Risk (chances per million) 3,4 Hazard Index 5

20 Meters 6 30 Meters 40 Meters 100 Meters 20 Meters 20 Meters

Resident Worker Resident Worker Resident Worker Resident Worker Acute Chronic

G-01

A

 7 64 27 34 14 21 8.9 4.0 1.7 <0.09 <0.4

A’ 868 29 36 15 22 9.5 4.3 1.8 <0.2 <0.4

B

 9 40 17 21 9.1 13 5.6 2.5 1.1 <0.09 <0.2

B’ 844 19 24 10 15 6.2 2.8 1.2 <0.2 <0.2

C

 10 35 15 19 7.9 12 4.9 2.2 0.9 <0.08 <0.2

C’ 840 17 21 8.9 13 5.5 2.5 1.1 <0.2 <0.2

D 11 47 20 25 11 15 6.6 3.0 1.3 <0.06 <0.2

D’ 852 22 27 12 17 7.2 3.3 1.4 <0.1 <0.2

G-02

A

 7 110 47 84 36 54 23 11 4.8 <0.08 <0.6

A’ 8112 48 86 37 56 24 12 4.9 <0.1 <0.6

B

 9 69 29 53 23 34 15 7.1 3.0 <0.08 <0.4

B’ 872 31 55 24 36 15 7.4 3.2 <0.1 <0.4

C

 10 61 26 47 20 30 13 6.2 2.7 <0.07 <0.3

C’ 863 27 49 21 31 13 6.5 2.8 <0.09 <0.3

D 11 81 35 63 27 40 17 8.4 3.6 <0.05 <0.4

D’ 884 36 65 27 42 18 8.6 3.7 <0.07 <0.4
VI-33

Table VI-9. Summary of the Potential Health Impacts at Various Distances for Three Generic Facilities Using Four Different Brake

Product Formulations and Four Product Categories at the Meteorological Site Yielding the Highest Concentrations (Anaheim)

(continued) 1,2

Fac.

Type Formulations

Potential Cancer Risk (chances per million) 3,4 Hazard Index 5

20 Meters 6 30 Meters 40 Meters 100 Meters 30 Meters 30 Meters

Resident Worker Resident Worker Resident Worker Resident Worker Acute Chronic

G-03

A 7-- -- 50 21 39 17 12 5.1 <0.03 <0.3

A’ 8-- -- 52 22 40 17 12 5.2 <0.04 <0.3

B

 9

-- -- 32 14 25 11 7.5 3.2 <0.03 <0.2

B’ 8-- -- 33 14 26 11 7.8 3.3 <0.04 <0.2

C

 10

-- -- 28 12 22 9.2 6.6 2.8 <0.03 <0.2

C’ 8-- -- 29 12 23 9.6 6.8 2.9 <0.04 <0.2

D 11-- -- 37 16 29 12 8.8 3.7 <0.02 <0.2

D’ 8-- -- 39 16 30 13 9.1 3.9 <0.03 <0.2

 1. All numbers have been rounded.

 2. Annual average concentrations for all ten meteorological sets listed in Appendix D were used to determine which meteorological site is presented in this table. The meteorological site that

 yields the smallest, medium, and largest concentrations may be different when evaluating acute rather than chronic concentrations. We selected meteorological sets based on chronic

 concentrations since these potentially provide the most significant health impacts.

 3. The distance listed is the estimated distance from the center of the facility to the receptor.

 4. Where appropriate, the potential risk estimates are adjusted for a working lifetime of 46 years and to allow for an operating schedule at an off-site facility that does not coincide with, or is

 shorter than, that of the facility being assessed.

 5. Hazard index listed here are the highest found for this facility in this meteorological data set. Facility G-03 was at 30 meters.

 6. Results are not available for G-03 facilities since the minimum modeled distance is 30 meters. 

 7. Formulation A is a Perc brake cleaner with 94% Perc by weight.

 8. Formulations A’, B’ ,C’, and D’ include the brake cleaner used in the corresponding letter (e.g., A’ corresponds to brake cleaner A) plus the use of carburetor-choke cleaner (CC), engine

 degreaser (ED), and general degreaser (GD) were modeled with average meteorological data. The health impacts for CC, ED, and GD were derived at each receptor distance using the

 average concentrations from all ten meteorological sites. See Table VI-12 for the potential health impacts from each individual product type and Appendix D for a detailed presentation of all

 modeling results.

 9. Formulation B is a Perc/MeCl brake cleaner with a 55% and 25% by weight Perc and MeCl content, respectively. 

 10. Formulation C is a Perc/MeCl/TCE brake cleaner with a 40%, 30%, and 20% by weight Perc, MeCl, and TCE content, respectively.

 11. Formulation D is a Perc/TCE brake cleaner with a 55% and 43% by weight Perc and TCE content, respectively.
VI-34

Table VI-10. Summary of the Potential Health Impacts at Various Distances for Three Generic Facilities Using Four Different Brake

Product Formulations and Four Product Categories at the Meteorological Site Yielding Middle Range Concentrations (Burbank) 1,2

Fac.

Type Formulations

Potential Cancer Risk (chances per million) 3,4 Hazard Index 5

20 Meters 6 30 Meters 40 Meters 100 Meters 20 Meters 20 Meters

Resident Worker Resident Worker Resident Worker Resident Worker Acute Chronic

G-01

A

 7 47 20 25 11 16 6.6 3.0 1.3 <0.09 <0.3

A’ 852 22 28 12 17 7.3 3.3 1.4 <0.2 <0.3

B

 9 30 13 16 6.8 9.8 4.2 1.9 0.8 <0.09 <0.2

B’ 834 15 18 7.8 11 4.8 2.2 0.9 <0.2 <0.2

C

 10 26 11 14 5.9 8.6 3.7 1.7 0.7 <0.08 <0.2

C’ 831 13 16 6.9 10 4.3 2.0 0.8 <0.2 <0.2

D 11 35 15 19 7.9 12 4.9 2.3 1.0 <0.06 <0.2

D’ 840 17 21 8.9 13 5.5 2.5 1.1 <0.1 <0.2

G-02

A

 7 86 36 63 27 41 17 8.5 3.6 <0.08 <0.5

A’ 888 38 65 28 42 18 8.8 3.7 <0.1 <0.5

B

 9 54 23 40 17 26 11 5.4 2.3 <0.08 <0.3

B’ 857 24 42 18 27 11 5.6 2.4 <0.1 <0.3

C

 10 47 20 35 15 22 9.5 4.7 2.0 <0.07 <0.2

C’ 850 21 37 16 24 10 5.0 2.1 <0.09 <0.2

D 11 63 27 47 20 30 13 6.3 2.7 <0.05 <0.3

D’ 866 28 49 21 31 13 6.6 2.8 <0.07 <0.3
VI-35

Table VI-10. Summary of the Potential Health Impacts at Various Distances for Three Generic Facilities Using Four Different Brake

Product Formulations and Four Product Categories at the Meteorological Site Yielding Middle Range Concentrations (Burbank)

(continued)1,2

Fac.

Type Formulations

Potential Cancer Risk (chances per million) 3,4 Hazard Index 5

20 Meters 6 30 Meters 40 Meters 100 Meters 30 Meters 30 Meters

Resident Worker Resident Worker Resident Worker Resident Worker Acute Chronic

G-03

A

 7

-- -- 37 16 31 13 9.0 3.8 <0.03 <0.2

A’ 8-- -- 38 16 32 14 9.3 3.9 <0.04 <0.2

B

 9

-- -- 23 9.9 20 8.4 5.7 2.4 <0.03 <0.2

B’ 8-- -- 24 10 21 8.8 6.0 2.5 <0.04 <0.2

C

 10

-- -- 19 8.3 16 7.0 4.7 2.0 <0.03 <0.08

C’ 8-- -- 21 8.7 17 7.4 5.0 2.1 <0.04 <0.09

D 11-- -- 27 12 23 9.9 6.7 2.8 <0.02 <0.2

D’ 8-- -- 28 12 24 10 6.9 3.0 <0.03 <0.2

 1. All numbers have been rounded.

 2. Annual average concentrations for all ten meteorological sets listed in Appendix D were used to determine which meteorological site is presented in this table. The meteorological site that

 yields the smallest, medium, and largest concentrations may be different when evaluating acute rather than chronic concentrations. We selected meteorological sets based on chronic

 concentrations since these potentially provide the most significant health impacts.

 3. The distance listed is the estimated distance from the center of the facility to the receptor.

 4. Where appropriate, the potential risk estimates are adjusted for a working lifetime of 46 years and to allow for an operating schedule at an off-site facility that does not coincide with, or is

 shorter than, that of the facility being assessed.

 5. Hazard index listed here are the highest found for this facility in this meteorological data set. Facility G-03 was at 30 meters.

 6. Results are not available for G-03 facilities since the minimum modeled distance is 30 meters. 

 7. Formulation A is a Perc brake cleaner with 94% Perc by weight.

 8. Formulations A’, B’ ,C’, and D’ include the brake cleaner used in the corresponding letter (e.g., A’ corresponds to brake cleaner A) plus the use of carburetor-choke cleaner (CC), engine

 degreaser (ED), and general degreaser (GD) were modeled with average meteorological data. The health impacts for CC, ED, and GD were derived at each receptor distance using the

 average concentrations from all ten meteorological sites. See Table VI-12 for the potential health impacts from each individual product type and Appendix D for a detailed presentation of all

 modeling results.

 9. Formulation B is a Perc/MeCl brake cleaner with a 55% and 25% by weight Perc and MeCl content, respectively. 

 10. Formulation C is a Perc/MeCl/TCE brake cleaner with a 40%, 30%, and 20% by weight Perc, MeCl, and TCE content, respectively.

 11. Formulation D is a Perc/TCE brake cleaner with a 55% and 43% by weight Perc and TCE content, respectively.
VI-36

Table VI-11. Summary of the Potential Health Impacts at Various Distances for Three Generic Facilities Using Four Different Brake

Product Formulations and Four Product Categories at the Meteorological Site Yielding the Lowest Concentrations (Oakland) 1,2

Fac.

Type Formulations

Potential Cancer Risk (chances per million) 3,4 Hazard Index 5

20 Meters 6 30 Meters 40 Meters 100 Meters 20 Meters 20 Meters

Resident Worker Resident Worker Resident Worker Resident Worker Acute Chronic

G-01

A

 7 27 11 14 6.1 8.9 3.8 1.8 0.75 <0.08 <0.2

A’ 831 13 17 7.1 10 4.4 2.0 0.9 <0.2 <0.2

B

 9 17 7.2 9.0 3.8 5.6 2.4 1.1 0.47 <0.08 <0.08

B’ 821 9.0 11 4.9 7.0 3.0 1.4 0.6 <0.2 <0.09

C

 10 15 6.3 7.9 3.4 4.9 2.1 1.0 0.4 <0.07 <0.06

C’ 819 8.2 10 4.4 6.4 2.7 1.3 0.5 <0.2 <0.07

D 11 20 8.4 11 4.5 6.6 2.8 1.3 0.6 <0.05 <0.08

D’ 824 10 13 5.5 8.0 3.4 1.6 0.7 <0.09 <0.09

G-02

A

 7 42 18 35 15 23 9.8 4.9 2.1 <0.07 <0.3

A’ 845 19 37 16 24 10 5.2 2.2 <0.09 <0.3

B

 9 27 11 22 9.5 15 6.2 3.1 1.3 <0.07 <0.2

B’ 829 12 24 10 16 6.7 3.4 1.4 <0.09 <0.2

C

 10 23 9.9 20 8.3 13 5.4 2.7 1.2 <0.06 <0.1

C’ 826 11 21 9.1 14 6.0 3.0 1.3 <0.08 <0.1

D 11 31 13 26 11 17 7.3 3.6 1.6 <0.04 <0.2

D’ 834 14 28 12 18 7.8 3.9 1.7 <0.06 <0.2
VI-37

Table VI-11. Summary of the Potential Health Impacts at Various Distances for Three Generic Facilities Using Four Different

Brake Product Formulations and Four Product Categories at the Meteorological Site Yielding the Lowest Concentrations

(Oakland) (continued)1,2

Fac.

Type Formulations

Potential Cancer Risk (chances per million) 3,4 Hazard Index 5

20 Meters 6 30 Meters 40 Meters 100 Meters 30 Meters 30 Meters

Resident Worker Resident Worker Resident Worker Resident Worker Acute Chronic

G-03

A

 7

-- -- 22 9.2 16 6.8 5.2 2.2 <0.03 <0.2

A’ 8-- -- 23 9.7 17 7.2 5.5 2.3 <0.03 <0.2

B

 9

-- -- 14 5.8 10 4.3 3.3 1.4 <0.02 <0.2

B’ 8-- -- 15 6.3 11 4.7 3.6 1.5 <0.03 <0.2

C

 10

-- -- 12 5.1 8.8 3.8 2.9 1.2 <0.02 <0.05

C’ 8-- -- 13 5.6 9.8 4.2 3.1 1.3 <0.03 <0.05

D 11-- -- 16 6.8 12 5.0 3.8 1.6 <0.02 <0.07

D’ 8-- -- 17 7.3 13 5.5 4.1 1.8 <0.02 <0.07

 1. All numbers have been rounded.

 2. Annual average concentrations for all ten meteorological sets listed in Appendix D were used to determine which meteorological site is presented in this table. The meteorological site that

 yields the smallest, medium, and largest concentrations may be different when evaluating acute rather than chronic concentrations. We selected meteorological sets based on chronic

 concentrations since these potentially provide the most significant health impacts.

 3. The distance listed is the estimated distance from the center of the facility to the receptor.

 4. Where appropriate, the potential risk estimates are adjusted for a working lifetime of 46 years and to allow for an operating schedule at an off-site facility that does not coincide with, or is

 shorter than, that of the facility being assessed.

 5. Hazard index listed here are the highest found for this facility in this meteorological data set. Facility G-03 was at 30 meters.

 6. Results are not available for G-03 facilities since the minimum modeled distance is 30 meters. 

 7. Formulation A is a Perc brake cleaner with 94% Perc by weight.

 8. Formulations A’, B’ ,C’, and D’ include the brake cleaner used in the corresponding letter (e.g., A’ corresponds to brake cleaner A) plus the use of carburetor-choke cleaner (CC), engine

 degreaser (ED), and general degreaser (GD) were modeled with average meteorological data. The health impacts for CC, ED, and GD were derived at each receptor distance using the

 average concentrations from all ten meteorological sites. See Table VI-12 for the potential health impacts from each individual product type and Appendix D for a detailed presentation of all

 modeling results.

 9. Formulation B is a Perc/MeCl brake cleaner with a 55% and 25% by weight Perc and MeCl content, respectively. 

 10. Formulation C is a Perc/MeCl/TCE brake cleaner with a 40%, 30%, and 20% by weight Perc, MeCl, and TCE content, respectively.

 11. Formulation D is a Perc/TCE brake cleaner with a 55% and 43% by weight Perc and TCE content, respectively.
VI-38

Table VI-12. Summary of the Potential Health Impacts at Various Distances for Three Generic Facilities Using Four Different 

Brake Product Formulations and Four Product Categories based on Default Meteorological Data 1,2

Fac.

Type Formulations

Potential Cancer Risk (chances per million) 3,4 Hazard Index 5

20 Meters 6 30 Meters 40 Meters 100 Meters 20 Meters 20 Meters

Resident Worker Resident Worker Resident Worker Resident Worker Acute Chronic

G-01

A

 7 89 38 67 29 52 22 18 7.5 <0.08 <0.5

A’ 8100 43 75 32 58 25 20 8.4 <0.2 <0.5

B

 9 56 24 42 18 33 14 11 4.7 <0.08 <0.3

B’ 867 29 50 21 39 17 13 5.6 <0.2 <0.3

C

 10 49 21 37 16 29 12 9.7 4.1 <0.08 <0.2

C’ 860 26 45 19 35 15 12 5.0 <0.2 <0.3

D 11 66 28 50 21 38 16 13 5.5 <0.05 <0.3

D’ 877 33 58 25 45 19 15 6.4 <0.1 <0.3

G-02

A

 7 125 53 103 44 86 37 38 16 <0.1 <0.7

A’ 8130 55 107 46 90 38 39 17 <0.1 <0.7

B

 9 79 34 65 28 54 23 24 10 <0.08 <0.4

B’ 884 36 69 29 58 25 25 11 <0.1 <0.4

C

 10 69 29 57 24 48 20 21 8.8 <0.07 <0.3

C’ 874 31 61 26 51 22 22 9.5 <0.09 <0.3

D 11 92 39 76 32 64 27 28 12 <0.05 <0.4

D’ 897 41 80 34 67 29 29 12 <0.07 <0.4
VI-39

Table VI-12. Summary of the Potential Health Impacts at Various Distances for Three Generic Facilities Using Four Different 

Brake Product Formulations and Four Product Categories based on Default Meteorological Data (continued)1,2

Fac.

Type Formulations

Potential Cancer Risk (chances per million) 3,4 Hazard Index 5

20 Meters 6 30 Meters 40 Meters 100 Meters 30 Meters 30 Meters

Resident Worker Resident Worker Resident Worker Resident Worker Acute Chronic

G-03

A

 7

-- -- 56 24 49 21 26 11 <0.04 <0.3

A’ 8-- -- 59 25 51 22 27 11 <0.05 <0.3

B

 9

-- -- 36 15 31 13 16 6.9 <0.04 <0.2

B’ 8-- -- 38 16 33 14 17 7.3 <0.05 <0.2

C

 10

-- -- 31 13 27 12 14 6.0 <0.03 <0.2

C’ 8-- -- 33 14 29 12 15 6.5 <0.04 <0.2

D 11-- -- 42 18 37 16 19 8.1 <0.02 <0.2

D’ 8-- -- 44 19 39 16 20 8.5 <0.03 <0.2

 1. All numbers have been rounded.

 2. Meteorological data conditions from the SCREEN3 dispersion model were used in the ISCST3 model to determine the potential health impacts listed in this table. 

 3. The distance listed is the estimated distance from the edge of the facility to the receptor. The distance listed for facility G-03 is 30 meters. 

 4. Where appropriate, the potential risk estimates are adjusted for a working lifetime of 46 years and to allow for an operating schedule at an off-site facility that does not coincide with, or is

 shorter than, that of the facility being assessed.

 5. Hazard indices listed here are the highest found for this facility in this meteorological data set.

 6. Results are not available for G-03 facilities since the minimum modeled distance is 30 meters. 

 7. Formulation A is a Perc brake cleaner with 94% Perc by weight.

 8. Formulations A’, B’ ,C’, and D’ include the brake cleaner used in the corresponding letter (e.g., A’ corresponds to brake cleaner A) plus the use of carburetor-choke cleaner (CC), engine

 degreaser (ED), and general degreaser (GD) were modeled with default meteorological data. The health impacts for CC, ED, and GD were derived at each receptor distance using the default

 meteorological data conditions from the SCREEN3 air dispersion model. See Table VI-13 for the potential health impacts from each individual product type and Appendix D for a detailed

 presentation of all modeling results.

 9. Formulation B is a Perc/MeCl brake cleaner with a 55% and 25% by weight Perc and MeCl content, respectively. 

 10. Formulation C is a Perc/MeCl/TCE brake cleaner with a 40%, 30%, and 20% by weight Perc, MeCl, and TCE content, respectively.

 11. Formulation D is a Perc/TCE brake cleaner with a 55% and 43% by weight Perc and TCE content, respectively.
VI-40

Table VI-13. Summary of the Potential Health Impacts at Various Distances for Three Generic Facilities Using 

Carburetor Cleaner, Engine Degreaser, and General Degreaser based on Average Meteorological Data 1,2

Fac.

Type

Product

Category

Potential Cancer Risk (chances per million) 3,4 Hazard Index 5

20 Meters 6 30 Meters 40 Meters 100 Meters 20 Meters 20 Meters

Resident Worker Resident Worker Resident Worker Resident Worker Acute Chronic

G-01

CC 7 0.7 0.3 0.4 0.2 0.2 0.1 0.05 0.02 <0.03 <0.01

ED 72.2 0.9 1.2 0.5 0.7 0.3 0.1 0.06 <0.02 <0.01

GD 7 1.5 0.7 0.8 0.3 0.5 0.2 0.1 0.04 <0.01 <0.01

Total 94.4 1.9 2.4 1.0 1.4 0.6 0.3 0.1 <0.05 <0.01

G-02

CC 7 0.4 0.2 0.3 0.1 0.2 0.09 0.04 0.02 <0.02 <0.01

ED 71.3 0.5 1.0 0.4 0.6 0.3 0.1 0.06 <0.01 <0.01

GD 7 0.9 0.4 0.7 0.3 0.4 0.2 0.09 0.04 <0.01 <0.01

Total 92.6 1.1 2.0 0.8 1.2 0.6 0.2 0.1 <0.02 <0.01

G-03

CC 7-- -- 0.2 0.08 0.2 0.07 0.05 0.02 <0.01 8 <0.01 8

ED 7-- -- 0.6 0.2 0.5 0.2 0.1 0.06 <0.01 8 <0.01 8

GD 7-- -- 0.4 0.2 0.3 0.1 0.1 0.04 <0.01 8 <0.01 8

Total 9-- -- 1.2 0.5 1.0 0.4 0.3 0.1 <0.01 8 <0.01 8

 1. All numbers have been rounded.

 2. The modeled concentrations for all ten meteorological sets listed in Appendix D were averaged at each receptor distance to determine the concentrations that would be used to estimate the

 potential health impacts listed in this table. See Appendix D for a detailed presentation of all modeling results. The potential health impacts in this table were derived from emissions and use

 information contained in Appendix F.

 3. The distance listed is the estimated distance from the center of the facility to the receptor.

 4. Where appropriate, the potential risk estimates are adjusted for a working lifetime of 46 years and to allow for an operating schedule at an off-site facility that does not coincide with, or is 

 shorter than, that of the facility being assessed.

 5. Hazard indices listed here are the highest found for this facility for the averaged meteorological data set.

 6. Results are not available for G-03 facilities since the minimum modeled distance is 30 meters. 

 7. CC means carburetor-choke cleaner; ED means engine degreaser; GD means general degreaser.

 8. Receptor distance of 30 meters

 9. The total potential health impacts from carburetor-choke cleaner (CC), engine degreaser (ED), and general degreaser (GD) at each receptor distance are used in Tables VI-8 to VI-10. 
VI-41

Table VI-14. Summary of the Potential Health Impacts at Various Distances for Three Generic Facilities Using Carburetor

Cleaner, Engine Degreaser, and General Degreaser based on Default Meteorological Data 1,2

Fac.

Type

Product

Category

Potential Cancer Risk (chances per million) 3,4 Hazard Index 5

20 Meters 6 30 Meters 40 Meters 100 Meters 20 Meters 20 Meters

Resident Worker Resident Worker Resident Worker Resident Worker Acute Chronic

G-01

CC 7 1.8 0.8 1.3 0.6 1.0 0.4 0.4 0.2 <0.03 <0.01

ED 75.3 2.3 4.0 1.7 3.1 1.3 1.0 0.4 <0.02 <0.02

GD 7 3.7 1.6 2.8 1.2 2.1 0.9 0.7 0.3 <0.01 <0.01

Total 911 4.7 8.1 3.5 6.2 2.6 2.1 0.9 <0.05 <0.03

G-02

CC 7 0.8 0.4 0.7 0.3 0.6 0.3 0.3 0.1 <0.02 <0.01

ED 72.5 1.1 2.0 0.9 1.7 0.7 0.7 0.3 <0.01 <0.01

GD 7 1.7 0.7 1.4 0.6 1.2 0.5 0.5 0.2 <0.01 <0.01

Total 95.0 2.2 4.1 1.8 3.5 1.5 1.5 0.6 <0.03 <0.02

G-03

CC 7-- -- 0.4 0.2 0.3 0.1 0.2 0.07 <0.018 <0.018

ED 7-- -- 1.1 0.5 1.0 0.4 0.5 0.2 <0.018 <0.018

GD 7-- -- 0.8 0.3 0.7 0.3 0.4 0.2 <0.018 <0.018

Total 9-- -- 2.3 1.0 2.0 0.8 1.1 0.5 <0.018 <0.018

 1. All numbers have been rounded

 2. Meteorological data conditions from the SCREEN3 dispersion model were used in the ISCST3 model to determine the potential health impacts listed in this table. See Appendix D for a

 detailed presentation of all modeling results. The potential health impacts listed in this table are based on the emissions and use information contained in Appendix F.

 3. The distance listed is the estimated distance from the edge of the facility to the receptor.

 4. Where appropriate, the potential risk estimates are adjusted for a working lifetime of 46 years and to allow for an operating schedule at an off-site facility that does not coincide with, or is 

 shorter than, that of the facility being assessed.

 5. Hazard indices listed here are the highest found for this facility for the default meteorological data set.

 6. Results are not available for G-03 facilities since the minimum modeled distance is 30 meters. 

 7. CC means carburetor-choke cleaner; ED means engine degreaser; GD means general degreaser.

 8. Receptor distance of 30 meters

 9. The total potential health impacts from carburetor-choke cleaner (CC), engine degreaser (ED), and general degreaser (GD) are used in Table VI-11. 

 
VI-42

4. Statewide Exposure to Perc, MeCl, and TCE

a. Perchloroethylene Population-Weighted Exposure

ARB staff conducted an analysis of the estimated statewide population-weighted

exposure to Perc. To do this, ARB staff used data from ARB’s air toxics monitoring network

and population data to obtain an estimated population-weighted Perc exposure. ARB staff chose

Perc for this analysis because it is the highest contributor to ambient risk of the three compounds

affected by this regulation.

The statewide population-weighted exposure is based on ambient data collected by the

ARB and population figures from the Department of Finance (DOF). The ambient air monitoring

network is designed to obtain outdoor ambient background, non-source-influenced, concentration

levels of air toxics from 21 ambient air toxics monitoring stations located statewide.

The methodology used to complete the analysis of the population exposure estimate of

Perc consists of two parts. The first part is an estimate of the Perc exposure in a given air basin,

which yields an average exposure for each air basin that was analyzed. Due to data limitations,

population exposure estimates were calculated differently for different air basins. Our analysis of

the Perc exposure covers six air basins, and approximately 72 percent of the statewide

population. The following Table VI-15 shows the estimated air basin population-weighted

exposure for the six basins used in this analysis. For a complete discussion on the methodology

used in this analysis see Appendix E. 

As shown in Table VI-15, on average, Perc exposure in the listed air basins has decreased

about 50 percent since 1990 levels. There is insufficient data to quantify how the ambient

reductions in Perc correspond to reductions in commercial and industrial Perc use. However,

reductions in ambient levels of Perc are likely the result of regulations or programs such as the

Dry Cleaning ATCM and voluntary modifications to work practices from sources using Perc due

to the AB 2588 Air Toxics “Hot Spots” Program. 
VI-43

Table VI-15. Air Basin Population-Weighted Perchloroethylene Exposure

based on 1990 Census (ppb-year/person)1

Air Basin 1990 1991 1992 1993 1994 1995 1996 1997

South Coast 0.590 0.542 0.430 0.472 0.410 0.392 0.330 0.264

South Central Coast 0.181 0.160 0.124 0.095 0.110 0.100 0.104 0.081

San Diego 0.280 0.261 0.262 0.193 0.204 0.244 0.133 0.124

San Francisco 0.196 0.223 0.158 0.124 0.082 0.091 0.068 0.071

San Joaquin Valley 0.121 0.131 0.105 0.410 0.067 0.070 0.064 0.056

Sacramento 

Valley

0.070 0.075 0.058 0.051 0.181 0.053 0.054 0.053

1. Only air basins with Perchloroethylene monitoring are included in this table. Air basin population-weighted exposure is calculated using 

 mean of monthly means for all sites within basin. Population exposure units are a concentration for a given duration per person. For this 

 analysis, the units are ppb-year/person.

In the second part of the analysis, the overall statewide population-weighted exposure

was calculated by multiplying the estimated annual average Perc exposure for a given air basin

by its population, added across all basins, then divided by the total population of the State. 

Table VI-16 shows the estimated statewide population-weighted Perc exposure from 1990 to

1997. 

Table VI-16. Estimated Statewide Population-Weighted Perchloroethylene Exposure

(ppb-year/person)1

1990 1991 1992 1993 1994 1995 1996 1997

0.382 0.362 0.290 0.322 0.262 0.251 0.203 0.168

 1. Population exposure units are a concentration for a given duration per person. For this analysis, the units are ppb-year/person

b. Statewide Exposure to MeCl and TCE

To determine ambient concentrations of MeCl and TCE, ARB staff used the statewide

average concentrations from ARB’s ambient toxics database. One limitation in using this data is

that in many cases MeCl and TCE measurements are below the level of detection (LOD). In

these cases, measured values are set to one-half the LOD. For example, over two-thirds of the

MeCl measurements are below the LOD; therefore, the statewide average concentration is driven

by one-half the LOD, rather than a true ambient mean. Table VI-17 shows the statewide average

concentration for MeCl and TCE from 1990 to 1997.
VI-44

Table VI-17. Statewide Average Concentration for MeCl and TCE (ppb)1

Compound 1990 1991 1992 1993 1994 1995 1996 1997

MeCl 1.09 1.27 0.75 0.93 0.79 0.77 0.66 0.66

TCE 0.115 0.086 0.061 0.036 0.047 0.035 0.034 0.033

1. Used statewide average of monthly average. Data from ARB’s ambient toxics database.

 

5. Potential Reductions in Ambient Levels of Perc, MeCl, and TCE from the

Proposed ATCM

In addition to the risk reduction benefits for on-site workers and near-source receptors, we

would expect a reduction in overall ambient levels of Perc, MeCl, and TCE. By reducing

ambient levels of these compounds, overall statewide risk reduction benefits can be achieved. 

The potential decrease in ambient levels of Perc, MeCl, and TCE emitted by the four product

categories can be estimated if we know their contribution to ambient levels. By estimating

emissions of Perc, MeCl, and TCE from the four product categories and dividing by total

emissions respectively, we can estimate the percentage of Perc, MeCl, and TCE emissions

attributed to the four product categories. Table V1-18 shows the reduction in ambient levels we

would expect based on the proposed ATCM.

Table VI-18. Estimated Potential Reductions in Ambient Levels of

 Perc, MeCl, and TCE from the Proposed ATCM

Compound Percent Reduction in Ambient Levels1,2

Perc 26

MeCl 5

TCE 37

 1. Assumes emissions are proportional to ambient levels.

 2. Inventory used to determine reduction in ambient levels does not include all sources of emissions; 

 therefore, potential reduction may be slightly overestimated.

a. Potential Reduction in Ambient Levels of Perc

To estimate total statewide emissions of Perc we compiled data from ARB’s 1996 Air

Toxic “Hot Spots” Emission Inventory (Hot Spots Inventory), ARB’s 1997 Consumer and

Commercial Product Survey (Consumer Products Survey), ARB’s 1997 Aerosol Coatings

Inventory, and dry cleaning emissions estimates. To estimate statewide emissions from dry

cleaners we used projected post-regulation emissions from the “Technical Support Document:
VI-45

Proposed Airborne Toxic Control Measure and Proposed Environmental Training Program for

Perchloroethylene Operations, August 27, 1993” (Perc Dry Cleaning TSD) (ARB, 1993a). 

The Perc Dry Cleaning TSD estimated that dry cleaning emissions would be reduced by

78 percent from 1991 emissions to post-regulation emissions. The ATCM for Perc Dry Cleaning

Operations required transfer and vented machines be phased out by October 1998; therefore, to

represent 1997 emissions we assumed that approximately 75 percent of transfer and vented

machines have been phased out and replaced by converted and closed loop machines. The

assumptions used in Chapter 10 of the Perc Dry Cleaning TSD were used to determine that the

1991 estimate of 13.6 tons per day would be reduced to 4.7 tons per day for 1997.

We estimated that approximately 16.3 tons per day of Perc are emitted from the sources

in the Hot Spots Inventory, Consumer Products Inventory, 1997 Aerosol Coatings Inventory, and

estimated dry cleaning emissions. We recognize that these inventories listed above do not

include all sources of Perc. For example, degreasing operations not accounted for in the Hot

Spots Inventory, could account for a significant contribution to overall Perc emissions. 

Therefore, this analysis may slightly underestimate total Perc emissions, thereby

overestimating the potential ambient contribution from the four product categories. In the future,

to allow us to better refine this analysis, ARB is currently in the process of completing an area

source inventory for air toxics which will be available in 2000. 

Based on the Consumer Products Inventory, we determined that Perc emissions from the

four product categories account for approximately 4.2 tons per day. If we assume that Perc

emissions are directly proportional to ambient levels, then we would expect that ambient

concentrations of Perc would be reduced by approximately 26 percent upon full implementation

of the proposed ATCM.

b. Potential Reduction in Ambient Levels of MeCl and TCE.

To estimate total statewide emissions of MeCl and TCE we compiled data from the Hot

Spots Inventory, the Consumer Products Inventory, and the 1997 Aerosol Coatings Inventory. 

We recognize that these inventories do not include all sources of emissions of MeCl and TCE. 

For example, there may be some facilities that emit these compounds which were not included in

the Hot Spots Inventory. Therefore, this analysis may slightly underestimate the total emissions

of MeCl and TCE, thereby overestimating the potential contribution from the four product

categories. We estimated that approximately 13.5 tons per day of MeCl and 0.8 tons per day of

TCE are emitted from the sources in these inventories. To better refine this analysis, ARB is in

the process of completing an area source inventory for air toxics which will be available in 2000. 

From the Consumer Products Inventory, we determined that MeCl emissions from the

four product categories account for approximately 0.7 tons per day, while TCE accounts for

approximately 0.3 tons per day. If we assume that MeCl emissions are directly proportional to
VI-46

ambient levels, then we would expect that ambient concentrations of MeCl would be reduced by

approximately 5 percent upon full implementation of the proposed ATCM. Additionally, if we

assume that TCE emissions are directly proportional to ambient levels, then we would expect

that ambient concentrations of TCE would be reduced by approximately 37 percent upon full

implementation of the proposed ATCM.

F. Multipathway Health Risk Assessment

In evaluating the potential health effects of a pollutant, it is important to identify the

different manners by which an individual could be exposed to the pollutant. The pathways that

can be included in an HRA, depend on the toxic air pollutants that a person (receptor) may be

exposed to, and can include inhalation, dermal exposure, and the ingestion of soil, water, crops,

fish, meat, milk, and eggs. For this HRA, we are evaluating the impacts for Perc, MeCl, and

TCE via the breathing or inhalation pathway only. We are not evaluating other pathways of

exposure because at this time OEHHA does not routinely use methods for assessing exposure to

volatile compounds such as Perc, MeCl, and TCE by exposure routes other than inhalation. Such

multiple exposure pathway (multipathway) assessments are traditionally used for lipophilic (fat

loving), semivolatile, or low volatility compounds such as dioxins, polycyclic organic

compounds (PAHs), or polychlorinated biphenyls (PCBs) (CAPCOA, 1993).
VII - 1

VII. THE PROPOSED CONTROL MEASURE AND ALTERNATIVES

In the previous two chapters we assessed emissions and potential risk from the use of

automotive consumer products containing the toxic air contaminants (TACs) Perc, MeCl, or TCE

at automotive maintenance and repair (AMR) facilities. Statewide, we estimated that each day

AMR activities emit more than five tons of Perc, MeCl, and TCE to the atmosphere. 

This chapter describes and provides the basis for the proposed Airborne Toxic Control

Measure for Emissions of Chlorinated Toxic Air Contaminants from Automotive Maintenance

and Repair Activities. Included in the basis for the proposed control measure is a discussion of

the options that staff evaluated to remove chlorinated compounds from automotive consumer

products. This chapter also describes alternatives to, and the technical feasibility of, the

proposed control measure.

A. The Proposed Control Measure

The proposed control measure would minimize emissions of Perc, MeCl, and TCE from

automotive maintenance and repair activities by regulating automotive consumer product content

and usage. Specifically, the proposed control measure requires that aerosol and liquid brake

cleaners, carburetor or fuel-injection air intake cleaners (carburetor cleaners), engine degreasers,

and general purpose degreasers sold or intended for sale in California not contain Perc, MeCl, or

TCE. The proposed ATCM language provides for the detection limits of the prescribed test

method by stating that a product is considered to contain Perc, MeCl, or TCE if it has one percent

or more (by weight) of any of the three compounds Perc, MeCl, or TCE. This also addresses the

issue of inadvertent contamination that may occur when manufacturers convert a production line

from one product to another. The proposed ATCM also prohibits AMR facility owners and

operators from using automotive consumer products that contain Perc, MeCl, or TCE in their

facilities. 

The first action ensures that we address residential and off-road use of aerosol and liquid

automotive consumer products containing chlorinated compounds and labeled as brake cleaners,

carburetor cleaners, engine degreasers, and general purpose degreasers as well as commercial use

in AMR facilities. The second action ensures that facility operators do not purchase bulk liquid

containers of Perc, MeCl, and TCE with the express intent of using it in a spray bottle or

compressed air sprayer.

The proposed control measure would require the removal of Perc, MeCl, and TCE from

any aerosol or liquid brake cleaner, carburetor cleaner, engine degreaser, or general purpose

degreaser manufactured after December 31, 2002. Manufacturers would be provided an

additional sell-through period of 18 months for chlorinated products manufactured prior to this

date.
VII - 2

Facility owners and operators would be provided an additional year from the end of the

sell-through period (June 30, 2004) to deplete their inventories of chlorinated products. The

proposed control measure would prohibit facility owners and operators from using chlorinated

automotive consumer products in their facilities after June 30, 2005.

To determine effective dates under the proposed ATCM, staff established dates consistent

with some of the effective dates listed under the Consumer Products Regulation, as amended in

October 1999 (ARB,1999b). For example, effective dates for brake cleaners and carburetor

cleaners under the Consumer Products Regulation coincide with the December 31, 2002,

effective date in the proposed ATCM. The effective date for aerosol general purpose degreasers

is January 1, 2002, which is a year sooner that what is required by the proposed ATCM. For

these categories, automotive consumer products manufactures would most likely conduct a onetime reformulation to comply with both the proposed ATCM and the Consumer Products

Regulation. Although the December 31, 2002, effective dates in the proposed ATCM for engine

degreasers and non-aerosol general purpose degreasers do not coincide with the Consumer

Products Regulation, staff believes automotive consumer products manufactures will have

sufficient time to reformulate to meet the December 31, 2002, effective date under the proposed

ATCM. Additionally, most manufacturers already market products that comply with the

proposed ATCM.

Additionally, the 18-month sell-through period under the proposed ATCM would provide

sufficient time for businesses to sell automotive consumer products, based on data provided in

the Proposed Amendments to the Statewide Regulation to Reduce Volatile Organic Compound

Emissions from Consumer Products, Phase II, Technical Support Document, October 1991

(Phase II TSD). In surveys conducted under the Phase II TSD, the majority of businesses

responded that most automotive consumer products are sold within one year (ARB, 1991b). 

Therefore, we have determined that an 18-month sell-through period is sufficient.

B. Basis For The Proposed Regulation

California Health and Safety Code (HSC) section 39665(b) requires the Board to address

the technological feasibility of proposed ATCMs. HSC section 39665(b) also requires the Board

to address the “availability, suitability and relative efficacy” of substitute products of a less

hazardous nature when proposing an ATCM. To evaluate the technological feasibility and

availability of the proposed ATCM, staff determined the market share of substitute or alternative

products. Staff determined suitability and efficacy by reviewing product labels and interviewing

users of both the products for which the limit is proposed and the alternative products.

1. Best Available Control Technology

In addition to the issues to be addressed under HSC section 39665(b), HSC section 39666

requires that any control measure for a TAC without a Board-specified threshold level be

designed to reduce emissions to the lowest level achievable through the application of best
VII - 3

available control technology (BACT) or a more effective control method. To determine BACT

for automotive maintenance and repair activities for each of the four product categories under the

proposed regulation, staff identified whether alternatives existed for a given product category,

and then evaluated the availability, suitability, and effectiveness of the alternatives. 

In evaluating BACT, staff evaluated three options. The first scenario addressed removing

Perc from brake cleaning products. In consideration of interchangeability of brake cleaning

compounds, the second scenario would additionally remove MeCl and TCE from brake cleaners. 

Finally, in consideration of the interchangeability of automotive consumer products, the third

scenario would remove Perc, MeCl, and TCE from not only brake cleaning products, but the

three additional product categories: carburetor cleaners, engine degreasers, and general purpose

degreasers. The following discussion addresses the HSC section 39665(b) requirements for each

of the three scenarios.

2. Scenario 1 - Remove Perc from Brake Cleaning Products

Information from the Manufacturer and Facility Surveys indicates that approximately

two-thirds of brake cleaning products do not contain Perc. Additionally, the Facility Survey

indicates that more than 60 percent of the facilities that use brake cleaning products use nonchlorinated brake cleaning products (see Table VII-1). Thus, non-chlorinated products are

considered to be technically feasible and available. We also found that, in almost all instances,

manufacturers of Perc brake cleaning products also market a non-chlorinated product and make

similar claims as to suitability on the product label (see Appendix H for examples of

manufacturer efficacy claims). Finally, facility operators contacted during staff site visits and

representatives of brake parts manufacturers (Raybestos and Federal-Mogul) indicated that

non-chlorinated aerosols and water-based brake washers, respectively, were effective brake

cleaning products (Raybestos, 1999; Federal-Mogul, 1999).

Table VII-1. Facility Survey Summary of Chlorinated and Non-chlorinated Product Usage

Product Category

Total Number

of Shops Using

Product

Category

Number and (Percent) of Shops using Selected Products 

NonchlorinatedOther

Chlorinated 1 Perc Only

Unknown

Formulations

Brake 2,3 3676 2256 (61) 8 (~0) 1364 (37) 48 (<1)

Carb and Fuel Injection 43508 3162 (90) 291 (8) 0 (0) 55 (<1)

Engine Degreaser 4496 443 (89) 8 (2) 27 (5) 18 (4)

General Purpose

Degreaser 4

171 163 (95) 0 (0) 0 (0) 8 (5)

1. These products contain Perc, MeCl, or TCE, either alone or in combination.

2. Information is compiled for both bulk and aerosol brake cleaner usage.

3. Number of shops that reported using a brake cleaner, whether they reported doing brakes or not.

4. The survey requested only aerosol product usage for these categories.

5. Numbers have been rounded and may not add to 100 percent.
VII - 4

We also learned through our survey that almost 25 percent of facilities performing brake

work did not use automotive consumer products. Instead they used water or petroleum washers,

or in some cases, nothing at all. Additionally, almost 50 percent of the Facility Survey

respondents already use a water-based portable brake cleaning unit in conjunction with other

products, and 12 percent use a water-based portable brake cleaning unit alone.

3. Scenario 2 - Remove Perc, MeCl and TCE from Brake Cleaning Products

Facility Survey respondents also reported using brake cleaning products which were

determined to contain MeCl and TCE, usually in conjunction with Perc. Scenario 2 assumes that

Perc is no longer available for brake cleaning product formulations and evaluates the effect of

brake cleaning products reformulated to contain a large proportion of MeCl or TCE. Based on

available formulation data, MeCl and TCE, when used alone would not likely exceed 60 and 45

percent, respectively, and in combination, would not likely exceed 90 percent of the content of a

product.

The unit risk factor for MeCl is approximately one-sixth that of Perc. Thus, the potential

health risk for a product containing 60 percent MeCl (formulations containing 60 percent MeCl

were observed during the site visits) would be one-tenth that of a 94 percent Perc product. 

Similarly, TCE has a unit risk approximately one-third that of Perc, so the potential health risk

for a product containing 45 percent TCE (TCE is a VOC and would be limited to 45 percent by

the Midterm Measures II Consumer Products Regulation) would be about one-seventh that of a

94 percent Perc product. The potential health risk for a product composed of 45 percent MeCl

and 45 percent TCE would be slightly less than one-fourth that of a 94 percent Perc product.

While the potential risk for a product containing MeCl, TCE, or both is lower than for

Perc, it could still be significant in some instances. For example, generic facility G2 would still

exceed a 10 in a million risk level at 20 meters for both the MeCl and TCE products. As such,

and in recognition of the statutory requirement for BACT and the availability of suitable and

effective alternatives, staff believe that brake cleaning products should not contain MeCl and

TCE.

4. Scenario 3 - Also Remove Perc, MeCl and TCE from Carburetor Cleaners,

Engine Degreasers, and General Purpose Degreasers

Information from the Facility Survey, as well as discussions with AMR facility operators

and the Institute for Research and Technical Assistance (IRTA), indicate that many operators use

various automotive consumer products interchangeably (IRTA, 1999). For example, a mechanic

may use a brake cleaner for engine and/or tool degreasing, or may use an engine degreaser or

carburetor cleaner for brake cleaning. While automotive consumer products manufacturers have

adamantly stated that they do not condone this activity and believe that each product is best

formulated for its intended purpose, many mechanics indicated that these products are used for,

and work equally well in, a variety of tasks. Therefore, it is necessary to address the potential

risk posed by product interchangeability.
VII - 5

The practice of mechanics substituting, on an equal basis, carburetor cleaner, engine

degreaser, or general purpose degreaser reformulated to contain Perc, MeCl or TCE for brake

cleaning products that would no longer contain Perc, MeCl or TCE would result in potential

health risks to the public analogous to those identified in section B.3. above. Again, staff

evaluated the availability, suitability, and effectiveness of alternatives in the three product

categories. 

Table VII-1 shows the relative proportion and percent of facilities using non-chlorinated

carburetor cleaning, engine degreasing and general purpose degreasing products. From the table,

it can be seen that the overwhelming majority of facilities (approximately 90 percent) use nonchlorinated carburetor cleaner, engine degreaser, and general purpose degreaser. Additionally,

carburetor cleaners are subject to United States Environmental Protection Agency (U.S. EPA)

regulations for fuel additives (ARB, 1999b). These regulations require manufacturers to register

their formulations and collectively fund a literature search on the potential health effects of the

use of their products. Currently, manufacturers can only register formulations with compounds

containing five elements: carbon, hydrogen, oxygen, nitrogen, and sulfur. However,

formulations containing other elements were registered prior to the 1990 Clean Air Act

Amendments. These formulations have been essentially “grandfathered” from the requirement

that they contain only compounds with the five elements mentioned (ARB, 1999b). Some of

these grandfathered products contain MeCl and Perc. Since non-chlorinated products in the three

categories of interest appear to predominate, staff concluded that alternative products are

technically feasibility and available. Additionally, product label claims and discussions with

facility operators indicate that the alternative products are both suitable and effective.

The number of products in the carburetor cleaner, engine degreaser, and general purpose

degreaser categories that contain Perc, MeCl and TCE, either in combination or alone, is small

and the products themselves generally only contain a small percentage of the chlorinated

compounds. As such, staff conclude that the additional requirement to remove these three

compounds from carburetor cleaner, engine degreaser, and general purpose degreaser would not

be an overly burdensome requirement and would reduce exposure to these compounds.

Based on this evaluation, staff believes that it is appropriate to eliminate the use of Perc,

MeCl and TCE in automotive consumer products used in AMR activities, and we established the

limits presented in Table VII-2. 
VII - 6

Table VII-2. BACT Product Content Limits

Evaluation

Level

Product Categories and Compounds Chlorinated Content

Limit (percent)

Scenario 1 Perc-containing brake cleaning products <11

Scenario 2

Perc, MeCl, and TCE-containing brake cleaning products <11

Scenario 3

Perc, MeCl and TCE-containing brake cleaners, carburetor

cleaners, engine degreasers, and general purpose degreasers

<11

1. As previously mentioned, the language of the proposed ATCM provides that a product is considered to contain Perc, MeCl, or TCE if it 

 contains one percent or more by weight of any one of the three compounds.

C. Alternatives to The Proposed Control Measure

Alternatives to the proposed control measure, other than taking no action, include

workplace practices and two product modification options. We evaluated each of the three

alternatives and determined that they would not be as effective at reducing emissions of Perc,

MeCl, and TCE from AMR activities as the proposed control measure. We also determined that

the three alternatives did not meet the objective of HSC section 39666 to reduce emissions to the

lowest level achievable through the application of BACT or a more effective control method in

consideration of cost, risk, and environmental impacts.

This section discusses each of the three alternatives and provides the reasons they were

considered to be less effective than the proposed regulation. For each of the three alternatives

evaluated, other than the “No Action” alternative, staff addressed four issues: applicability,

effectiveness, enforceability, and cost/resource requirements.

1. Alternative One - No Action

The “no action” alternative would not address the potential risk posed by the use of

automotive consumer products containing Perc, MeCl, and TCE in AMR activities. As

evidenced by the potential health impacts discussed in Chapter VI, this alternative would not be

protective of public health.

2. Alternative Two - Workplace Practices

The workplace practices alternative would require that AMR facility operators implement

process controls including: (1) the use of a reservoir to capture any runoff from the use of brake

cleaning products, and (2) the disposal of the runoff as a hazardous waste. This alternative

would apply only to the brake cleaning product category. 
VII - 7

a. Applicability

This alternative would not address the capture of brake cleaning products used for

applications other than brake cleaning. It additionally would not address the capture of

carburetor cleaner, engine degreaser, or general purpose degreaser unless they were being used

for brake cleaning. Finally, it would not address the use of these products in other industrial,

institutional, and residential settings.

b. Effectiveness

Information from the manufacturing industry indicates that workplace standards could

achieve capture efficiencies of approximately 43 percent for disk brakes and 68 percent for drum

brakes (CRC, 1998). Staff estimated that an average facility performs 25 percent of its brake

jobs on drum brakes and 75 percent on disk brakes, and would therefore expect to observe an

average capture efficiency of 50 percent. Thus, a facility (with a 50 percent capture efficiency)

that currently exceeds a 22 chances in a million risk level from automotive maintenance and

repair activities would still exceed the10 chances in a million “Hot Spots” notification level

established by most air pollution control and air quality management districts (districts) after

implementing the workplace standards outlined in this control alternative. Additionally, residual

risk posed by these facilities would still have to be addressed. In light of the availability of

alternative products that contain no chlorinated compounds, a measure that only addressed 50

percent of emissions would not be considered BACT.

c. Enforceability

As part of this alternative, the manufacturing industry indicated that they would

participate in an education program by including workplace standard information in their

labeling. We believe that, even with an education program, many facilities would not use capture

reservoirs in the absence of district inspectors. Discussions with several operators indicate that

they would not be inclined to capture runoff unless they were being watched. It is unlikely that

this alternative could be adequately enforced by the State’s districts and the Board.

d. Cost and Resource Requirements

Currently, many facility operators have either water washers or parts washers in their

facilities. The trend in the automotive repair industry appears to be toward a mobile parts washer

that could be wheeled under vehicles for performing brake services. The proposed concept

would require facility operators to procure another reservoir specifically for brake service 

operations to avoid contamination of the fluids used in their water washers or parts washers. 

This is necessary because the hazardous waste companies that collect spent baths set strict limits

on the level of contamination by chlorinated solvents. This separate waste stream would result in

increased disposal costs and might require modifications to the facility’s DTSC permit for on-site

hazardous waste storage.
VII - 8

As enforcement would be conducted predominantly by the districts, the burden of

enforcement costs would fall to them. However, several larger districts already inspect AMR

facilities, generally in connection with degreasing rules, and the incremental cost of this

alternative would likely be minimal. Cost estimates for district inspectors to enforce the

proposed ATCM are addressed in Chapter IX.

3. Alternative Three - Product Modification / Risk-based Content Limits

This alternative falls into the product modification category and would require that

automotive consumer products manufacturers establish chlorinated compound content limits that

would result in the potential risk of a product falling below a prescribed risk level. 

a. Applicability

This alternative could be applied to the brake cleaner product category alone, or to all

four product categories. In either case, this alternative would address both institutional/industrial

and residential use. In other words, it provides emissions reductions from both “hot spots”

(AMR facilities) and non-“hot spot” area sources (residential usage). It additionally addresses

use outside the automotive maintenance and repair activities arena. 

b. Effectiveness

This alternative would require the establishment of a product content cap based on a

corresponding acceptable risk level (an acceptable number of chances in a million), and ignores

the requirement for best available control technology. In addition to not addressing the

requirement for BACT, this alternative is dependent upon the meteorological data set chosen for

modeling. Thus the product content cap necessary to avoid exceeding a set risk level in one

geographic location in the State would not be sufficient to avoid exceeding the same risk level in

another location. 

If this alternative addressed Scenario 1, it could lead to increased MeCl and TCE use in

brake cleaners. If this alternative addressed Scenario 2, it could lead to increased Perc, MeCl and

TCE use in carburetor cleaners, engine degreasers, and general purpose degreasers. 

Regardless of whether this alternative addressed Scenario 1, Scenario 2, or Scenario 3, it

would likely result in increased VOC use and emissions. Each subsequent scenario would have

greater potential VOC usage and emissions. If manufacturers could market chlorinated

automotive consumer products meeting the risk-based content limits prescribed by this

alternative, then the continued use of chlorinated compounds would be greater than with

Alternative Four or the proposed control measure. Thus, this alternative would likely result in

lower VOC use and emissions than Alternative Four or the proposed control measure.
VII - 9

c. Enforceability

Primary responsibility for enforcement of this alternative, as with all ATCMs, would be

with the districts. However, HSC section 39669 also grants ARB enforcement authority. As

many districts do not have the inherent capability to analyze consumer products, it is possible

that the ARB might have to provide laboratory and compliance assistance. This alternative is

more enforceable than Alternative Two (workplace standards) because it regulates fewer

sources - manufacturers instead of facilities. There is also a clear cut test method for determining

compliance versus having to observe facility operators using or not using capture reservoirs.

d. Cost and Resource Requirements

This alternative would have a fiscal impact on the State and air districts, as well as an

economic impact on business. The impact on AMR facilities would be minimal. The impact on

the districts would be dependent upon how heavily they had to rely upon the ARB’s laboratory

and compliance resources. If districts elected to establish a memorandum of understanding with

the ARB authorizing the ARB’s Compliance Division to enforce the ATCM, then enforcement

could be conducted in conjunction with enforcement of the Consumer Products Regulations. In

other words, the division of fiscal impacts between state and district entities would depend

largely upon where the split in agreed upon enforcement responsibility lies. 

4. Alternative Four - Product Modification / Chlorinated Compound Phase Out

This alternative also falls into the product modification category and would require that

automotive consumer products manufacturers remove chlorinated compounds from the four

product categories in discrete steps. 

a. Applicability

This alternative could be applied to the brake cleaner product category alone, or to all

four product categories. In either case, this alternative would address both institutional/industrial

and residential use. 

b. Effectiveness

This alternative would require the removal of one or more of the compounds Perc, MeCl,

or TCE from up to four automotive consumer products categories depending upon the control

scenario selected, but would accomplish the removal through a series of sequential reductions. 

As such, it would eventually represent BACT. However, it would not be as effective in reducing

chlorinated emissions as the proposed control measure because it would not remove the

chlorinated compounds as quickly.
VII - 10

If this alternative addressed Scenario 1, it could lead to increased MeCl and TCE use in

brake cleaners. If this alternative addressed Scenario 2, it could lead to increased Perc, MeCl and

TCE use in carburetor cleaners, engine degreasers, and general purpose degreasers. 

Regardless of whether this alternative addressed Scenario 1, Scenario 2, or Scenario 3, it

would likely result in increased VOC use and emissions. Each subsequent scenario would have

greater potential VOC usage and emissions. This alternative, regardless of scenario, would result

in lower VOC use and emissions than the proposed control measure because it would not remove

the chlorinated compounds as quickly.

c. Enforceability

Primary responsibility for enforcement of this alternative, as with all ATCMs, would be

with the districts. However, HSC section 39669 also grants ARB enforcement authority. As

many districts do not have the inherent capability to analyze consumer products, it is possible

that the ARB might have to provide laboratory and compliance assistance. This alternative is

more enforceable than Alternative Two (workplace standards) because it regulates fewer sources

- manufacturers instead of facilities. There is also a clear cut test method for determining

compliance versus having to observe facility operators using or not using capture reservoirs. 

This alternative would be more difficult to enforce than the proposed control measure because

there could be several intermediate content limits which could have an impact on laboratory

testing and the need to re-educate compliance personnel as each new limit became effective. 

d. Cost and Resource Requirements

This alternative would have a fiscal impact on the State and air districts, as well as an

economic impact on business. The impact on AMR facilities would be minimal. The impact on

the districts would be dependent upon how heavily they had to rely upon the ARB’s laboratory

and compliance resources. If districts elected to establish a memorandum of understanding with

the ARB authorizing the ARB’s Compliance Division to enforce the ATCM, then enforcement

could be conducted in conjunction with Compliance Division enforcement of the Consumer

Products Regulations. In other words, the division of fiscal impacts between state and district

entities would depend largely upon where the split in agreed upon enforcement responsibility

lies. 

D. Evaluation of the Proposed Control Measure

In Part B., staff discussed selecting Scenario 3 as the basis for the proposed control

measure. Staff addressed the same four issues of applicability, effectiveness, enforceability, and

cost/resource requirements when considering the proposed control measure.
VII - 11

1. Applicability

The proposed control measure could be applied to the brake cleaner product category

alone, or to all four product categories. In either case, this alternative would address both

institutional/industrial and residential use. 

2. Effectiveness

The proposed control measure would require the removal of Perc, MeCl, and TCE from

all four automotive consumer products categories without the use of sequential reductions. As

with Alternative Four (phase out), it would represent BACT; however, it would achieve greater

emissions reductions because BACT would be achieved much sooner. 

Again, the proposed control measure could lead to increased MeCl and TCE use in brake

cleaners if it addressed Scenario 1. The proposed control measure could lead to increased Perc,

MeCl and TCE use in carburetor cleaners, engine degreasers, and general purpose degreasers if it

addressed Scenario 2. Thus, the proposed control measure addresses Scenario 3. 

Regardless of whether the proposed control measure addressed Scenario 1, Scenario 2, or

Scenario 3, it would likely result in increased VOC use and emissions. Each subsequent scenario

would have greater potential VOC usage and emissions. The proposed control measure,

regardless of scenario, would result in higher VOC use and emissions than Alternatives Three or

Four because it requires that the chlorinated content not exceed one percent, and does not provide

for sequential reductions.

3. Enforceability

Primary responsibility for enforcement of the proposed control measure, as with all

ATCMs, would be with the districts. However, HSC section 39669 also grants ARB

enforcement authority. As many districts do not have the inherent capability to analyze

consumer products, it is possible that the ARB might have to provide laboratory and compliance

assistance. The proposed control measure is more enforceable than Alternative Two (workplace

standards) because it regulates fewer sources - manufacturers instead of facilities. There is also a

clear cut test method for determining compliance versus having to observe facility operators

using or not using capture reservoirs. The proposed control measure would be the easiest to

enforce. 

4. Cost and Resource Requirements

The proposed control measure would have a fiscal impact on the State and air districts, as

well as an economic impact on business. The impact on AMR facilities would be minimal. The

impact on the districts would be dependent upon how heavily they had to rely upon the ARB’s

laboratory and compliance resources. If districts elected to establish a memorandum of

understanding with the ARB authorizing the ARB’s Compliance Division to enforce the ATCM,
VII - 12

then enforcement could be conducted in conjunction with enforcement of the Consumer Products

Regulations. In other words, the division of fiscal impacts between state and district entities

would depend largely upon where the split in agreed upon enforcement responsibility lies. 
VIII-1

VIII. POTENTIAL HEALTH IMPACTS OF THE PROPOSED AIRBORNE

TOXIC CONTROL MEASURE

This chapter discusses the potential health impacts of this proposed Airborne Toxic

Control Measure (ATCM). The topics addressed below include the benefits of the proposed

ATCM toward statewide emissions and potential health impacts, a general assessment of the

potential health impacts that could result from the remaining chemical ingredients used in the

four product categories, and a general discussion of workplace exposure. 

A. Statewide Emissions and Risk Reduction Benefits of the Airborne Toxic Control

Measure

Since the proposed ATCM would result in the removal of Perc, MeCl, and TCE in the

four product categories, the emission and health impact (i.e., potential cancer risk) reduction

benefits are 100 percent. A total reduction of 5.17 tons per day of Perc, MeCl, and TCE could be

achieved as a result of the proposed ATCM. As presented in Chapter VI, an additional benefit of

the proposed ATCM is a reduction in ambient levels of Perc, MeCl, and TCE. Overall we

estimated a reduction in ambient levels of Perc by 26 percent, MeCl by 5 percent, and TCE by

37 percent. By reducing ambient levels of these compounds, overall statewide risk reduction

benefits can be achieved. 

In determining the potential reduction in ambient levels from the proposed ATCM, we

assumed that a proportionality of emissions can be used to calculate ambient levels of Perc,

MeCl, and TCE. In addition, we compiled inventory data to determine the percentage of

emissions from the four product categories. This percentage was then applied to the total

ambient concentration to determine the percentage of each compound attributed to the four

product categories. Note, however that some sources of Perc, MeCl, and TCE emissions may not

be accounted for in the inventory data used and therefore the reduction in ambient levels may be

slightly overestimated. See Chapter VI, Section 5 for a complete discussion on potential

reduction in ambient levels of Perc, MeCl, and TCE. 

B. Potential Adverse Health Effects from Use of Volatile Organic Compounds

The intent of this exercise was to determine what the potential health impacts could be

from the remaining chemical constituents currently used in these four product categories if Perc,

MeCl, and TCE are removed and secondly, if only Perc is removed. To perform this evaluation,

Material Safety Data Sheets (MSDS) were used to obtain chemical ingredient information for

products that AMR facilities reported using in the Facility Survey. The MSDS information was

obtained by calling the manufacturers or distributers directly, or if available, from a

manufacturer’s web site. In addition, a list of ingredients for these four product categories was

obtained from the 1997 Consumer and Commercial Products Survey. A complete list of the
VIII-2

chemical ingredients for the four product categories can be found in Appendix G. The listing of

chemical ingredients in Appendix G identifies whether these compounds are regulatory defined

as volatile organic compounds (VOCs), are identified or candidate toxic air contaminants (TACs)

under California’s Air Toxics Program, and whether the substance has approved cancer and

non-cancer health effects values. 

In addition to those currently used in the four automotive consumer product categories,

staff intends to monitor the usage of other identified TACs and will propose amendments to the

ATCM if appropriate. Additionally, product manufacturers will be advised to not use identified

TACs in their product formulations. 

For this exercise, we assumed that any of the chemical ingredients meeting this criteria

could have a maximum content of 45 percent. The 45 percent VOC limit is used because that

was the limit established for brake cleaners in the October 1999 Amendments to the Consumer

Products Regulation approved by the ARB in October 1999. The VOC content limit for the four

product categories range from 35 to 50 percent in the October 1999 amendments. 

1. VOCs that are Candidate or Identified TACs

a. Scenario One: Removal of Perc, TCE, and MeCl

Under this scenario, we used the information in Appendix G to see what the potential

individual health impacts could be for chemical ingredients that are regulatory defined as both

volatile organic compounds (VOCs) and candidate or identified TACs if Perc, MeCl, and TCE

are removed. 

 

As a screen to determine the worst-case scenario, we identified the individual ingredients

from Appendix G that have the highest cancer potency and/or lowest non-cancer chronic or acute

reference exposure levels (RELs). Benzene is the only ingredient in Appendix G that has a

cancer potency factor. Eight ingredients have acute and/or chronic RELs. Of those eight,

naphthalene had the lowest chronic REL and benzene had the lowest acute REL. 

No adverse health impacts from the compounds on this list (other than Perc, MeCl, and

TCE) are expected. The apparent use of benzene (which is a TAC as well as a VOC) was a

concern for staff; however, upon further investigation, staff learned that it was only used by one

manufacturer (in one product) at concentrations less than two percent (a second manufacturer

indicated they had one product in which benzene was a contaminant). Staff intends to monitor

the usage of other TACs and will propose amendments to the ATCM if appropriate. 

Additionally, manufacturers will be advised to not use identified TACs in their product

formulations.

 
VIII-3

b. Scenario Two: Removal of Perc

The removal of Perc from the four product categories leaves TCE, a TAC and VOC, as an

ingredient with the potential for expanded use in these products. Additionally, MeCl may also be

used to further increase the chlorinated content of a reformulated product. Looking specifically

at aerosol brake cleaners as an example, TCE (a VOC) is subject to a 45 percent VOC limit as

specified in the ARB’s consumer product regulations. While there are no such restrictions for

MeCl, however, the total chlorinated content for this exercise is being capped at 90 percent. A

90 percent cap allows for the inclusion of other compounds as well as propellants. Table VIII-1

summarizes the impact of Perc replacement in brake cleaners compared to current emissions.

Table VIII-1. Potential TCE and MeCl Emissions

After Removal of Perc from Aerosol Brake Cleaners

Compound Current Emissions 

from Brake Cleaners

[lbs/yr]1

Emissions With Replacement of Perc [lbs/yr]

45% TCE 45% TCE/45% MeCl

Perc 2,978,400 0 0

MeCl 211,700 0 1,340,280

TCE 58,400 1,340,280 1,340,280

1. Based on ARB surveys.

From a risk standpoint, the individual potential cancer risk would decrease by

approximately 84 percent when compared to the potential individual health risk for AMR

facilities using Perc-containing products. An 84 percent decrease would result in a potential

cancer risk of approximately 21 chances per million at the near-source (20 meter) location for the

generic facilities using default meteorological data. Regarding non-cancer health impacts, the

chronic hazard indices for TCE at a 45 percent content level is less than 0.1 for the generic

facilities using default meteorological data. Generally, hazard indices less than one are not

considered to be a concern to public health. 

The use of a TCE/MeCl product at a 90 percent combination content level (45 percent

each) would result in approximately a 75 percent decrease in the individual potential cancer risk

when compared to the potential individual health risk for AMR facilities using Perc-containing

products. While this decrease may sound significant, this still could pose a potential cancer risk

of approximately 31 chances per million at the near-source (20 meter) location for the generic

facilities using default meteorological data. Regarding non-cancer health impacts, the chronic

hazard indices for TCE/MeCl product at a 90 percent content level is less than 0.1 for the generic

facilities using default meteorological data. Generally, hazard indices less than one are not

considered to be a concern to public health.
VIII-4

2. VOCs that are Not Candidate or Identified TACs

The second group of ingredients that were evaluated included those that are VOCs but

that are not a candidate or identified TAC. None of the ingredients in Appendix G that meet this

criteria have cancer potency factors. One of the ingredients (2-butoxyethanol) listed in 

Appendix G has both an acute and chronic REL. The acute and chronic hazard indices for this

ingredient at the 45 percent content level are less than 0.5 for the generic facilities using default

meteorological data. Generally, hazard indices less than one are not considered to be a concern

to public health.

C. Replacement With Other Toxic Air Contaminants that are Not Volatile Organic

Compounds

1. Scenario One: Removal of Perc, TCE, and MeCl

For this portion of the evaluation, we reviewed the ingredients listed in Appendix G to

determine if any are candidate or identified TACs that are not classified as VOCs. There are no

ingredients which satisfy this criteria and have an approved cancer potency factor. Two

ingredients, have an acute and/or chronic RELs. Of those, ammonia had both the lowest chronic

and acute RELs. The acute and chronic hazard indices for this ingredient at the 45 percent

content level are less than 0.2 for the generic facilities using default meteorological data. 

Generally, hazard indices less than one are not considered to be a concern to public health. 

In addition to those currently used in the four automotive consumer product categories,

staff intends to monitor the usage of other identified TACs and will propose amendments to the

ATCM if appropriate. Additionally, product manufacturers will be advised to not use identified

TACs in their product formulations. 

2. Scenario Two: Removal of Perc

The removal of Perc from the four product categories leaves MeCl, a TAC that is not a 

VOC, as an ingredient with the potential for expanded use in these products. During the site

visits, products were observed with MeCl content as high as 60 percent. Additionally, TCE may

be used to further increase the chlorinated content of a reformulated product, subject to the 35 to

50 percent VOC limit specified in the ARB’s consumer product regulations (TCE is a VOC). 

Again, in order allow for the inclusion of other compounds and propellants for aerosol products,

the total chlorinated content for this exercise is being capped at 90 percent. Table VIII-2

summarizes the impact of Perc replacement compared to current emissions for aerosol brake

cleaners as an example.

From a risk standpoint, the individual potential cancer risk would decrease by

approximately 89 percent when compared to the potential individual health risk for AMR

facilities using Perc-containing products. An 89 percent decrease would result in a potential
VIII-5

cancer risk of approximately 14 chances per million at the near-source (20 meter) location for the

generic facilities using default meteorological data. Regarding non-cancer health impacts, the

acute and chronic hazard indices for MeCl at a 60 percent content level are less than 0.1. 

Generally, hazard indices less than one are not considered to be a concern to public health. 

Table VIII-2. Potential MeCl and TCE Emissions

After Removal of Perc from Aerosol Brake Cleaners

Compound Current Emissions 

from Brake Cleaners

[lbs/yr]1

Emissions With Replacement of Perc [lbs/yr]

60% MeCl 45% MeCl/45% TCE

Perc 2,978,400 0 0

MeCl 211,700 1,787,040 1,340,280

TCE 58,400 0 1,340,280

1. Based on ARB surveys.

As mentioned above, the use of a TCE/MeCl product at a 90 percent combination content

level (45 percent each) would result in approximately 75 percent decrease in the individual

potential cancer risk when compared to the potential individual health risk for AMR facilities

using Perc-containing products. While this decrease may sound significant, this still could pose a

potential cancer risk of approximately 31 chances per million at the near-source (20 meter)

location for the generic facilities using default meteorological data. Regarding non-cancer health

impacts, the chronic hazard indices for TCE/MeCl product at a 90 percent content level is less

than 0.1 for the generic facilities using default meteorological data. Generally, hazard indices

less than one are not considered to be a concern to public health.

 

D. Replacement With Compounds that are Not Toxic Air Contaminants or Volatile

Organic Compounds

None of the compounds listed in Appendix G of the TSD meet this criteria. 

E. Workplace Exposure

Perc, TCE and MeCl are probable human carcinogens. The California Department of

Industrial Relations-Division of Occupational Safety and Health Administration (Cal/OSHA)

regulates Perc, TCE and MeCl in the workplace environment. To protect worker safety,

Cal/OSHA has established a permissible exposure limit (PEL) for the compounds. The PEL is

the maximum, eight-hour, time-weighted average concentration for occupational exposure and is

25 ppmv for Perc, TCE and MeCl. Since the proposed ATCM will remove these compounds
VIII-6

from automotive consumer products, worker exposure to Perc, MeCl, and TCE from automotive

consumer product use will be eliminated.
IX-1

IX. ECONOMIC IMPACTS OF THE PROPOSED AIRBORNE TOXIC

CONTROL MEASURE

A. Summary of Economic Impacts

No significant economic impacts are expected from the proposed Airborne Toxic Control

Measure (ATCM). Automotive consumer products are manufactured or marketed by

60 companies nationwide, with ten based in California. Most manufacturers already have at least

one non-chlorinated volatile organic compound (VOC) product on the market that meets the

requirements of the proposed ATCM, and therefore, are not expected to incur additional costs. 

Those companies that do not currently have VOC products and choose to formulate one are

expected to be able to absorb the cost of reformulation with no adverse impacts on their

profitability. 

The analysis showed that raw materials costs for chlorinated Toxic Air Contaminant

(TAC) products are greater than the raw materials costs for VOC products. As a result, it should

be less costly to manufacture non-chlorinated VOC products as opposed to products that contain

perchloroethylene (Perc), methylene chloride (MeCl), or trichloroethylene (TCE). However,

there are no noticeable differences between the market prices for chlorinated TAC and VOC

products. Therefore, there should be no economic impact on the consumer. 

The economic analysis focused on worse case assumptions. It was assumed that the costs

to comply with this ATCM would be the same costs that a company would incur if they were

reformulating a product to meet a new VOC limit under the Consumer Products Program.

Essentially, each manufacturer and marketer is assumed to “reinvent the same wheel” and

directly conduct all reformulation, and research and development efforts. By doing this, we were

very conservative in an effort to estimate costs.

Overall, most affected businesses will be able to absorb the costs of the proposed ATCM

with no significant adverse impacts on their profitability. This finding is indicated by the staff’s

analysis of the estimated change in “return on owner’s equity” (ROE). The analysis found that

the overall change in ROE ranges from negligible to a decline in ROE of about six percent, with

an average decline in ROE of about two percent. However, the proposed ATCM may impose

economic hardship on some businesses with small or no margin of profitability. If necessary,

these businesses can seek relief under the variance provision of the proposed ATCM. A variance

may provide sufficient time to minimize the cost impacts to these businesses. Because the

proposed ATCM would not alter significantly the profitability of most businesses, we do not

expect a noticeable change in employment; business creation, elimination, or expansion; and

business competitiveness in California.
IX-2

Our analysis shows that the cost-effectiveness of the proposed requirements is similar to

the cost-effectiveness of previously approved ATCMs (Perc Dry Cleaning Operations ATCM,

Ethylene Oxide ATCM, Non-Ferrous Metal Melting ATCM). The estimated cost-effectiveness

of the proposed ATCM for reducing a pound of TAC, specifically Perc, MeCl, and TCE, range

from no cost (net savings or no cost) to about $0.23 per pound of TAC reduced (in 1999 dollars). 

The cost-effectiveness that considers the emission and health impact reduction benefits ranges

from approximately $1,400 to $111,000 per cancer case avoided. These ranges are significantly

less than previously approved ATCMs, which generally have fallen within an overall range of

$0.64 to $1.77 (adjusted to 1999 dollars) per pound of Perc reduced (1993 Perchloroethylene Dry

Cleaning Operations ATCM) and $6,600 to $18.6 million (adjusted to 1999 dollars) per cancer

case avoided (1992 Non-Ferrous Metal Melting ATCM).

While determining the maximum and minimum cost-effectiveness values is useful for

establishing boundaries, it is also useful to determine the average cost-effectiveness of the

proposed ATCM. To this end, an estimate of the average cost-effectiveness as an emissions

reduction-weighted value provides more insight into the overall cost-effectiveness of the ATCM

than a simple arithmetic mean of the calculated individual values. Unlike a simple arithmetic

mean, a weighted average accounts for the relative efficiency as well as the relative magnitude of

the emission reductions for the ATCM. Overall, the emission reductions-weighted average

(ERWA) cost-effectiveness for the proposed ATCM is about $0.03 per pound of TAC reduced. 

That is, the average cost to reduce one pound of TAC averaged across all the categories subject

to the proposed ATCM is less than five cents. This estimated average cost-effectiveness

compares favorably with the cost-effectiveness of the ARB programs mentioned previously.

One way to project the potential change in product prices is to determine the potential

change in raw materials costs, which generally have the biggest influence in product costs for

most consumer product categories. Our analysis indicates that raw material costs for chlorinated

TAC products are greater than for VOC products which comply with the proposed ATCM. 

Therefore, raw material cost changes should be negligible (net savings or no cost). Again, this

compares favorably to the change in per unit cost projected for the existing consumer product

regulations. The analysis assumed the present cost for raw materials. Depending on the

formulations chosen by manufacturers and the future price of raw materials, this range may be

lower or higher at the actual compliance dates. To the extent that the projected cost savings or

increases are ultimately passed on to the consumer, the actual retail price of products after the

proposed limits become effective may be higher or lower than suggested by this analysis.

Even if all annualized nonrecurring costs (research and development, capital equipment

purchases, etc.) and recurring raw material cost increases are factored into the affected products

manufacturing costs, the potential increase in production per-unit costs are comparable to

existing ARB consumer product regulations. The estimated per-unit cost increases from both

annualized nonrecurring and annual recurring costs range from negligible cost (net savings or no

cost) to about $0.09 per unit. When averaged over the total number of unit sales in California of

regulated products, the unit sales-weighted average cost increase is about $0.02 per unit. As
IX-3

noted before, these per unit cost increases compare favorably to the change in per unit cost

projected for existing ARB consumer product regulations.

B. Economic Impacts Analysis on California Businesses as Required by The California

Administrative Procedure Act (APA)

1. Legal Requirements

Section 11346.3 of the Government Code requires State agencies to assess the potential

for adverse economic impacts on California business enterprises and individuals when proposing

to adopt or amend any administrative regulation. The assessment shall include a consideration of

the impact of the proposed regulation on California jobs, business expansion, elimination or

creation, and the ability of California business to compete with businesses in other states.

Also, State agencies are required to estimate the cost or savings to any state or local

agency and school district in accordance with instructions adopted by the Department of Finance. 

The estimate shall include any nondiscretionary cost or savings to local agencies and the cost or

savings in federal funding to the state.

Health and Safety Code section 57005 requires the ARB to perform an economic impact

analysis of submitted alternatives to a proposed regulation before adopting any major regulation. 

A major regulation is defined as a regulation that will have a potential cost to California business

enterprises in an amount exceeding ten million dollars in any single year. The proposed ATCM

is not a major regulation.

2. Potential Impact on California Businesses

Overall, most affected businesses will be able to absorb the costs of the proposed ATCM

with no significant adverse impacts on their profitability. However, the proposed measures may

impose economic hardship on some businesses with small or no margin of profitability. If

necessary, these businesses can seek relief under the variance provision of the proposed ATCM

for extensions to their compliance dates. Such extensions may provide sufficient time to

minimize the cost impacts to these businesses. Because the proposed ATCM would not alter

significantly the profitability of most businesses, we do not expect a noticeable change in

employment; business creation, elimination or expansion; and business competitiveness in

California.

This portion of the economic impacts analysis is based on a comparison of the return on

owners’ equity (ROE) for affected businesses before and after inclusion of the cost to comply

with the proposed requirements. The data used in this analysis are obtained from publicly

available sources, the ARB’s 1997 Consumer and Commercial Products Survey, and the staff’s

cost-effectiveness analysis discussed later in this chapter.
IX-4

3. Affected Businesses

Any business which manufactures or markets chlorinated automotive consumer products

would potentially be affected by the proposed ATCM. Also potentially affected are businesses

which supply raw materials to these manufacturers or marketers, distribute or retail, and use

chlorinated automotive consumer products. The focus of this analysis, however, is on

manufacturers or marketers because these businesses are directly affected by the proposed

ATCM. 

Automotive consumer products are manufactured or marketed by 60 companies

nationwide, of which ten (mostly medium- or small-sized firms) are based in California

according to the ARB’s Consumer Products Registration Database. These companies

manufacture and market an estimated total of 186 VOC and 66 chlorinated TAC products. 

California companies accounted for nine percent of chlorinated TAC and VOC products

manufactured or marketed in California as shown in Table IX-1.

Table IX-1. Number of Chlorinated TAC and VOC Products Marketed in California

Product Type California Firms Non-California Firms Total

Chlorinated TAC Products 6 9% 60 91% 66 100%

VOC Products 16 9% 170 91% 186 100%

Total 22 230 252

Firms 10 50 60

All affected products are classified under Standard Industrial Classification (SIC) 2842 or

the new North American Industry Classification System (NAICS) 325612. A list of these

products is provided in Table IX-2. The product category with the most chlorinated TAC

products is automotive brake cleaners (2202), followed by general purpose degreasers (5203c),

carburetor cleaners (2203), and engine degreasers (2204a).
IX-5

Table IX-2. Affected Product Categories

Code Category Products

VOC Chlorinated

TAC

2202 Automotive Brake Cleaners 61 37

2203 Carburetor Cleaners 45 11

2204a Engine Degreasers 56 6

5203c General Purpose Degreasers 

(including aerosol Solvent Parts Cleaners)

24 12

a. Study Approach

This study covers one industry with 60 affected businesses. The approach used in

evaluating the potential economic impact of the proposed ATCM on these businesses is outlined

as follows:

C A sample of three representative businesses of different sizes was selected from

the list of 60 affected businesses based on the size of their sales and number of

noncompliant products they manufacture or market;

C Compliance cost was estimated for each of these businesses;

C Estimated cost was adjusted for federal and state taxes; and,

C The three-year average ROE was calculated, where data was available, for each of

these businesses by averaging their ROEs for 1996 through 1998. ROE is

calculated by dividing the net profit by the net worth. The adjusted cost was then

subtracted from net profit data. The results were used to calculate an adjusted

three-year average ROE. The adjusted ROE was then compared with the ROE

before the subtraction of the adjusted cost to determine the potential impact on the

profitability of the business. A reduction of more than 10 percent in profitability

is considered to indicate a potential for significant adverse economic impacts.

The threshold value of 10 percent has been used consistently by the ARB staff to

determine impact severity (ARB, 1990b; ARB, 1991b; ARB, 1995; ARB, 1999b). This

threshold is consistent with the thresholds used by the United States Environmental Protection

Agency and others.

b. Assumptions

The ROEs before and after the subtraction of the adjusted compliance costs were

calculated for each size business using financial data for 1996 through 1998. The calculations

were based on the following assumptions:
IX-6

C Selected businesses are representative of affected businesses;

C All affected businesses were subject to the highest federal and state corporate tax

rates of 35 percent and 8.8 percent respectively; and,

C Affected businesses are not able to increase the prices of their products, nor can

they lower their costs of doing business through short-term cost-cutting measures.

Given the limitation of available data, staff believes these assumptions are reasonable for

most businesses; however, they may not be applicable to all businesses.

c. Results

Typical California businesses are affected by the proposed ATCM to the extent that the

additional costs imposed by the proposed requirements would change their profitability. A

detailed analysis of these costs is provided in the cost-effectiveness section of this report. The

cost analysis shows that the estimated annualized costs of reformulating a noncompliant product

will range from $1,392 to $17,840, with an average of $9,616 (see Table IX-4).

Using ROE to measure profitability, we found that the average ROE of sample businesses

in the automotive consumer products industry declined by about 2.04 percent as shown in

Table IX-3. This represents a minor change in the average profitability of sample businesses.

Table IX-3. Changes in Return on Owner’s Equity (ROEs) for 

Typical Businesses in Automotive Consumer Products Industry

Size Change in ROE

Small 6.01%

Medium 0.07%

Large 0.04%

Average 2.04%

Note: all “change in ROEs” shown are negative (i.e., shows a decline in profitability)

The projected change in profitability of typical businesses in the automotive consumer

products industry varied widely. The predicted decline in profitability of sample businesses

ranged from a high of about 6.01 percent for a small business to a low of 0.04 percent for a large

business, as shown in Table IX-3. This variation in the impact of the proposed ATCM can be

attributed mainly to two factors. First, large businesses incur higher costs due to the number of

noncompliant (chlorinated TAC) products they manufacture or market. For example, the

estimated annualized costs for sample businesses ranged from a high of about $67,300 to a low

of about $28,800. Second, the performance of businesses may differ from year to year. Hence,
IX-7

the average 1996 through 1998 financial data used may not be representative of an average-year

performance for some businesses. 

The estimated changes to ROEs may be high for the following reasons. First, annualized

costs of compliance are estimated using, in part, the current prices of raw materials. Raw

material prices usually tend to fall as higher demand for these materials induces economy of scale

production in the long run. Second, affected businesses probably would not absorb all of the

increase in their costs of doing business. They might be able to either pass some of the cost on to

consumers in the form of higher prices, reduce their costs, or do both.

4. Potential Impact on Consumers

The potential impact of the proposed ATCM on consumers depends upon how it would

change the price and performance attributes of chlorinated TAC products. Currently, there are no

noticeable differences between the market prices for chlorinated TAC and VOC products. These

products are basically interchangeable. According to the industry sources, both chlorinated TAC

and VOC products have basically the same performance attributes, except that many chlorinated

TAC products are nonflammable while VOC products are typically flammable. (For a discussion

of flammability, see Chapter X, Section F). Given the availability of good substitute products, it

is unlikely that affected businesses will be able to pass on the cost increases to consumers. Thus,

we estimated that the cost increase per unit will range from no change to $0.09, with an average

of about $0.02. 

The proposed ATCM, however, may limit the product choices available to consumers by

requiring manufacturers not to sell chlorinated TAC products in California. This may not be a

major problem because there is more demand for VOC products than for chlorinated TAC

products in the market. According to the ARB 1997 Consumer Products Survey, there are three

VOC products in the market for every one chlorinated TAC product. Presently, the market sales

for these products is split approximately 60 and 40 percent between VOC and chlorinated TAC

products. According to the industry sources, about 90% of these products are used for nonresidential applications. Automotive repair facilities may have an incentive to reduce their uses

of chlorinated TAC products because it would reduce the amount of hazardous waste generated,

thus reducing their disposal costs. 

5. Potential Impact on Employment

The proposed ATCM is not expected to cause a noticeable change in California

employment and payroll because the contribution of the affected industry to the California

economy is marginal. California accounts for a small share of manufacturing employment for

automotive consumer products. According to the 1997 Economic Census, California

employment in the industry (NAICS 325612/SIC 2842, which includes establishments engaged

in manufacturing and packaging polishes and speciality cleaning preparations) was 1,669 in

1997, or about 7.6 percent of the national employment in the industry. This also represents only
IX-8

about 0.09 percent of the total manufacturing jobs in California. These employees working in

83 establishments generated about $51 million in payroll, accounting for less than 0.02 percent of

total California manufacturing payroll in 1997. Twenty-three establishments had over

20 employees; the rest had less than 20 employees each. 

The employment in the speciality cleaning preparations industry is unlikely to change

significantly as a result of the proposed ATCM. This is because, as shown above, affected

manufacturers or marketers are able to absorb the reformulation costs with no significant impact

on their profitability. The bulk of brake cleaning products, however, are used by brake repair

shops. In 1997, California automotive speciality repair shops (SIC 7539), which included brake

repair shops, employed 6,128 persons with a payroll of about $144 million. The employment in

these shops is unlikely to be affected adversely by the proposed ATCM. This is because we do

not expect a noticeable change in the prices of reformulated products. The availability of good

substitute products in the market is likely to prevent affected manufacturers or marketers from

passing along the reformulation costs to their consumers in the form of higher prices.

6. Potential Impact on Business Creation, Elimination or Expansion

The proposed ATCM would have no noticeable impact on the status of California

businesses. This is because the reformulation costs are not expected to impose a significant

impact on the profitability of businesses in California. However, some small businesses with

little or no margin of profitability may lack the financial resources to reformulate their products

in a timely manner. Should the proposed measures impose significant hardship on these

businesses, temporary relief in the form of a compliance date extension under the variance

provision of the proposed ATCM may be warranted.

While some individual businesses may be affected adversely, the proposed ATCM may

provide business opportunities for existing California businesses or result in the creation of new

businesses. California businesses which supply raw materials or provide consulting services to

affected industries may benefit from increased industry spending on reformulation. 

7. Potential Impact on Business Competitiveness

The proposed ATCM should have no significant impact on the ability of California

businesses to compete with businesses in other states. Because the proposed ATCM would apply

to all businesses that manufacture or market automotive consumer products for sale in California

regardless of their location, the staff’s proposal should not present any economic disadvantages

specific to California businesses. Of a total of 60 companies involved in manufacturing or

marketing automotive consumer products, ten were located in California. Only three of ten

California companies manufactured or marketed chlorinated TAC products subject to the

proposed ATCM. These companies manufactured or marketed only 6 out of 66 noncompliant

TAC products.
IX-9

Nonetheless, the proposed ATCM may have an adverse impact on the competitive

position of some small, marginal businesses in California if these businesses lack resources to

develop commercially acceptable products in a timely manner. As stated above, such impacts

can be mitigated to a degree with a justifiable compliance extension under the variance provision

of the proposed ATCM. 

C. Analysis of Potential Impacts to California State or Local Agencies

The proposed ATCM should have no economic impact on State agencies. There are no

State agencies that manufacture or market automotive consumer products which are subject to

the proposed ATCM. However, the Air Resources Board (ARB or Board) may incur additional

implementation or enforcement costs at some future time.

The proposed ATCM should have minimal economic impacts on the local air pollution

control and air quality management districts (districts). Health and Safety Code section 39666

requires that after the adoption of the proposed ATCM by the Board, the districts must enforce

the ATCM or adopt and enforce an equal or more stringent regulation. Beginning in 2005, the

districts, during their normal course of business, will be responsible for determining if

automotive maintenance and repair (AMR) facilities are using complying automotive consumer

products as defined by the proposed ATCM. The inspection for complying automotive consumer

products should add very little time to the total time it takes to conduct an inspection. Because

AMR facilities are currently not required to be permitted by the districts, we are unable to

estimate how many AMR facilities a district will visit during the course of a year. Therefore, the

total economic impact on the districts cannot be quantified. However, the cost for a district

inspector to perform an AMR facility inspection is estimated to range from $50 to $83 per hour

(AQMD, 2000).

D. Analysis of the Cost-Effectiveness of the Proposed ATCM

This is the first ATCM to address consumer products. Therefore, to evaluate the costeffectiveness for this ATCM, we used methods that have been used in the past for both the Toxic

Air Contaminant Control Program and the Consumer Products Program. For a VOC or criteria

pollutant regulation, the cost effectiveness is usually assessed on the basis of the cost per pound

of pollutant controlled. This type of evaluation allows us to compare the efficiency of the

proposed regulation in reducing a pound of pollutant relative to existing regulations. For an air

toxics control regulation, we use a method that considers both the quantity and toxicity of the

emissions reduced. This measure of cost-effectiveness is based on the calculation of the cost per

potential cancer case avoided. 

1. Methodology

The cost-effectiveness of a standard is generally defined as the ratio of total dollars to be

spent to comply with the standard (as an annualized cost) to the mass reduction of the
IX-10

ATCM (Annualized Fixed Costs)Pre-Reg + (Annual Recurring Costs )Pre-Reg

(Annual Mass Reduction in TAC)Pre-Reg

ATCM

ATCM

- 1

n

(1 + i)

n

i (1 + i)

(Fixed Costs) x 

pollutant(s) to be achieved by complying with that standard (in annual pounds). Annual costs

include annualized non-recurring fixed costs (e.g., total research and development, product and

consumer testing, equipment purchases/modifications, etc.) and annual recurring costs (e.g., raw

materials, labeling, packaging, etc.). 

As in the past Consumer Products regulations, ARB staff analyzed each product category

independently of the others as if it was a separate regulation. By evaluating each product

category separately, we can examine the impact that the proposed regulation may have on

manufacturers in each category. This is a conservative assumption since we know there will be a

sharing of technology between departments of a company that makes products for several

product categories. 

In this analysis, we annualized the non-recurring fixed costs using the Capital Recovery

Method, as recommended under guidelines issued by the California Environmental Protection

Agency (Cal/EPA). Using this method, we multiply the estimated total fixed costs to reformulate

a product by the Capital Recovery Factor (CRF) to convert these costs into equal annual

payments over a project horizon (i.e., the projected useful life of the investment) at a discount

rate (Cal/EPA, 1996). We then sum the annualized fixed costs with the annual recurring costs

and divide that sum by the annual emission reductions to calculate the cost-effectiveness for the

estimated mass of pollutant(s) reduced. Equation 1 presents the methodology for calculating

cost-effectiveness.

(1) Cost-Effectiveness =

where:

(2) Annualized Fixed Costs =

i(1+i)n/((1+i)n-1) = Capital Recovery Factor (CRF)

i = discount interest rate over project horizon, in percent

n = number of years in project horizon

Fixed Costs = total nonrecurring cost per product category

i.e. (Nonrecurring Cost per Product) x (Total Noncompliant Products in

the Category)

A convenient method for estimating the annual recurring cost component is to separate

Equation 1 into two fractions, one for the nonrecurring costs and one for the recurring costs. It

can then be shown that the cost-effectiveness fraction for recurring costs can be simplified and

calculated as follows:
IX-11

(Compliant Materials Cost) - (Baseline Materials Cost)

(Baseline TAC Emissions) - (Compliant Emissions of TACs)

(3) Annual Recurring =

Costs (Emissions)

where,

Baseline Materials Cost = cost of raw materials for each pound of product ($/lb), based on

product formulations prior to ATCM implementation

Baseline TAC Emissions = Emission of TACs prior to ATCM implementation

Compliant Materials Cost = cost of raw materials for each pound of product ($/lb), based on

product formulations that meet the proposed ATCM

Compliant TAC Emissions = Emission of TACs after full implementation of ATCM

To use Equation 3, we determined the sales-weighted average VOC and chlorinated TAC

contents of products in each of the four product categories, based on sales data and the speciated

formulations as reported by manufacturers in the ARB’s 1997 Consumer and Commercial

Products Survey. To the extent feasible, we then determined the detailed formulations which

most closely reflect the “typical” (i.e., sales-weighted average) VOC and chlorinated TAC

products. These formulations, in turn, were designated as compliant and baseline formulations,

respectively. 

For most ingredients, we used the most recent, distributor-level bulk prices from the

Chemical Market Reporter (November 29, 1999), or from information gathered during the

October 1999 Amendments to the Consumer Products Regulation, to calculate the baseline and

compliant material costs based on these designated formulations. These analyses are shown in

Table IX-5 (pages 17 & 18) and discussed in more detail in “Annual Recurring Cost (Impacts to

Raw Materials Cost)” later in Section D-4.

2. Assumptions

In this analysis, we made an assumption that the costs to comply with this ATCM would

be the same costs that a company would incur if they were reformulating a product to meet a new

VOC limit under the Consumer Products Program. For fixed nonrecurring costs, we assumed

that all manufacturers will conduct their own research and development, purchase their own

equipment, and make all other expenditures and efforts necessary to reformulate their products. 

Essentially, each manufacturer and marketer is assumed to “reinvent the same wheel” and

directly conduct all reformulation and research and development efforts. In reality, however, a

large portion of the consumer products market is manufactured by contract fillers. These

businesses, who usually conduct their own reformulation efforts in-house, fill products for a

large number of consumer product marketers. Contract fillers are therefore able to avoid

duplication of reformulation efforts by applying “technology transfer” between product lines of

different companies. The full extent to which contract fillers make products for other companies
IX-12

under each category is unknown. However, to the extent contract fillers are used by companies

to make complying products, the actual cost to comply with the ATCM for the entire industry is

likely to be less than predicted, resulting in more cost-effective emission reductions than

indicated in this analysis.

We calculated the cost-effectiveness with an assumed project horizon of 10 years, a

commonly cited period for an investment’s useful lifetime in the chemical processing industry. 

We also assumed a fixed interest rate of 10 percent throughout the project horizon. These

assumptions are conservative and constitute standard practice in cost-effectiveness analyses of air

pollution regulations, including previous consumer product rulemakings. Based on these

assumptions, the Capital Recovery Factor is 0.16274.

In the 1997 and 1999 amendments to the Consumer Products Regulation, the Consumer

Products staff assumed products reformulated to meet the proposed limits would be marketed

throughout the United States by national marketers. Except for the aerosol coatings regulation

(title 17, CCR, sections 94520-94528), the Consumer Products staff found that businesses

generally formulated products compliant with the Phase I (1990) and Phase II (1991) Consumer

Products Regulations and antiperspirant/deodorant regulations for the entire nation, rather than

incurring the additional cost of setting up a California versus 49-state product distribution

system. We believe the same strategy will be employed by companies subject to the proposed

ATCM. We therefore assumed that, for the annualized fixed cost portion of Equation 1 it is

appropriate to either use the fixed cost for national production divided by the national emission

reductions or, equivalently, use the California-apportioned (by population) annualized fixed cost

divided by the California-apportioned emission reductions under the proposed ATCM (ARB,

1999b).

For the annual recurring costs, we assumed that to make compliant VOC reformulations

would result in cost changes as a result of changes in a product’s raw materials and their

associated prices. Changes in packaging, labeling, distribution and other recurring costs were

assumed to be negligible relative to baseline levels of these costs. This assumption is based on

previous consumer product regulatory experiences. To illustrate, ARB staff conducted a

comprehensive technical assessment of the 55 percent VOC hairspray limit, which required

extensive reformulations and revolutionary changes to existing products. The hairspray limit is

generally considered to be among the most challenging of the consumer product limits; it likely

resulted in more changes to the regulated product, relative to pre-regulatory products, than any

other VOC limit. However, the staff’s assessment found that changes to recurring costs other

than hairspray raw material costs were expected to be negligible (ARB, 1997d). Based on this

finding and because there are compliant VOC products currently available, we believe our

assumptions regarding the recurring costs are reasonable.

In the 1999 Consumer Products amendments, the definition for “general purpose

degreaser” was modified to include products that are designed to clean miscellaneous metallic

parts. These products are currently sold and labeled as “solvent parts cleaner” or “metallic parts
IX-13

C.E.1991 index

C.E.1999 index

Non - Recurring Costs (in 1999 dollars) = Non - Recurring Costs (in 1991dollars) x 

cleaner.” These products have functions similar to general purpose degreasers in that they are

designed to remove or dissolve grease, dirt, grime, and other contaminants (ARB, 1999b). In the

1997 Consumer and Commercial Products Survey the general purpose degreaser category was

grouped under “household care products.” For the cost analysis, the general purpose

degreaser/solvent parts cleaner category was analyzed as a “household” product. For this

ATCM, most of the products in the general purpose degreaser/solvent parts cleaner category are

for automotive use and were therefore analyzed as automotive products. The difference in the

analysis is that the initial “estimated annualized fixed cost to reformulate” is different for the

household care and automotive categories.

3. Non-Recurring Fixed Costs

In the past, reviews of relevant technical literature and industry trade journals provided

little information that could be used to estimate costs directly. This is not surprising, because the

consumer products industry is very competitive, and production cost data specific to a company

are closely-guarded trade secrets. In addition, ARB staff have had very limited success with cost

surveys in the past and did not expect one to provide much useful information in this rulemaking

(e.g., during the 1991 consumer products Phase II rulemaking, cost survey responses from only

three manufacturers were received out of several hundred that were mailed; ARB, 1991b). 

Therefore, ARB staff developed estimates for nonrecurring cost based on analogous costs

reported by ARB staff for the Phase II Consumer Products rulemaking (ARB,1991b;

Appendix D1). The Phase II nonrecurring costs are applicable for this analysis since they were

based on staff’s detailed estimates of labor, research and development, equipment purchase, and

other costs involved in product reformulations for four generic product categories which included

automotive consumer products. This is the same approach that was used for the 1997 and 1999

consumer products amendments. 

The Phase II nonrecurring investment costs, reported in 1991 dollars, were adjusted to

1999 dollars using a well-established method of ratioing chemical engineering plant cost indices

as follows (Peters and Timmerhaus, 1980):

(4)

where,

C.E. 1999 index = 1999 Chemical Engineering Plant Cost Index = 392.0

C.E. 1991 index = 1991 Chemical Engineering Plant Cost Index = 357.6

(Chemical Engineering, November 1999)

ARB Consumer Product staff believe the original Phase II cost estimates were beneficial

at the time of rulemaking for predicting the costs to comply with those limits. However, in 1997,

the ARB Consumer Products staff completed a detailed technical assessment of the hairspray

second-tier limit. They believe those original cost estimates grossly overestimated true
IX-14

nonrecurring costs for Phase II by about a factor of ten. The aforementioned hairspray technical

assessment projects industry will spend on average, based on real-world expenditures to date, an

estimated $100,000 per noncompliant hairspray product to meet the second-tier limit ($20 to

$50 million total cost divided by an estimated 350 noncompliant hairspray products;

ARB, 1997c). Because the hairspray category arguably represents a worst-case scenario, with its

two-tier limits requiring extensive reformulations, research and development, and

consumer/safety testing, they believe the $100,000 per product nonrecurring costs for hairsprays

is a reasonable, order-of-magnitude upper boundary for average per-product reformulation costs

under most of the proposed new limits. We therefore estimated the nonrecurring costs for the

ATCM by adjusting the Phase II estimates to be consistent (same order of magnitude) as the

$100,000 per product real-world average expenditures for hairsprays (ARB, 1999b). 

The number of noncomplying products used for the calculations came from the

1997 Consumer and Commercial Products Survey. This survey was mailed to over

3,000 companies nationwide at the end of February 1998. The survey requested data on about

100 categories of consumer products. Extensive outreach efforts were made to maximize the

market coverage of the survey. The Consumer Products staff found that the survey and extensive

outreach resulted in an estimated 90 percent market coverage for most categories (ARB, 1999b). 

It is not possible for a survey of this magnitude to reach the entirety of the consumer products

industry. Therefore, as a conservative estimate, the number of noncomplying products have been

multiplied by a factor of 1.2 to adjust for 80% market coverage. 

Table IX-4 shows our estimates for per-product and total annualized nonrecurring costs

for each of the four product categories subject to the proposed ATCM. As shown, we project a

per-product annualized nonrecurring cost ranging from a low of about $8,550 to a high of about

$110,000. With approximately 80 noncompliant (chlorinated TAC) products that would need to

be reformulated, the overall total annualized fixed cost to industry is projected to range from

about $110,000 to $1.4 million dollars per year, with a general breakdown of this range as

follows: automotive brake cleaners (56 percent), carburetor or fuel-injection air intake cleaners

(17 percent), engine degreasers (9 percent), and general purpose degreasers/solvent parts

cleaners (18 percent).

4. Annual Recurring Cost (Impacts to Raw Materials Cost)

In this analysis, we evaluated the anticipated cost impacts that the proposed ATCM may

have on raw material costs. An evaluation of the impacts to raw material costs provides an

indicator of possible impacts to the retail prices of the affected products (assuming the cost

impacts are passed on partially or fully to consumers). Because of unpredictable factors such as

the highly competitive nature of the consumer products market, it is not possible to accurately

predict the final retail price of products that will comply with the proposed ATCM when it

become effective. To the extent the cost impacts are passed on to consumers, the final retail

prices may be lower or higher than suggested by this analysis.
Table IX-4. Estimated Total Annualized Non-Recurring Fixed Cost to Comply with Proposed ATCM

Estimated # of Estimated Total One-Time Cost Estimated Annualized Cost Estimated Annualized Fixed Cost to

Chlorinated TAC to Reformulate Per Product to Reformulate Per Product Reformulate All Chlorinated TAC Products

Products (dollars) (dollars per year) (dollars per year)

Code Category Low High Low High Low High

(A) B1 B2 C1 = (B1 x CRF) C2 = (B2 x CRF) D1 = (A x C1) D2 = (A x C2)

2202 Automotive Brake Cleaners 44 $8,550 $109,620 $1,392 $17,840 $61,784 $792,100

2203 Carburetor, Fuel-Injection Cleaners 13 $8,550 $109,620 $1,392 $17,840 $18,368 $235,489

2204a Engine Degreasers 7 $8,550 $109,620 $1,392 $17,840 $10,019 $128,449

5203c G.P. Degreaser/Solvent Parts Cleaner (Aerosol) 14 $8,550 $109,620 $1,392 $17,840 $20,038 $256,897

SUM = 79

1999 Chemical Engineering Plant Cost Index = 392.0 (Prelim 8/99) Market Adjustment = 1.2 Grand Annual Total $110,209 $1,412,936

1991 Chemical Engineering Plant Cost Index = 357.6 (Final 1991) (used to estimate total number of chlorinated TAC products in CA) (dollars per year)

Discount Rate 10.00%

Notes: (1) # Chorinated TAC Products = (Market Adj.) x (# Chlorinated TAC Products in Survey) Project Horizon, in years 10

 (Survey is 1997 Consumer and Commerical Products Survey) Capital Recovery Factor (CRF) 0.16275

(2) Estimated Total One-Time Cost to Reformulate from 1991 Consumer Products

 Report. (See Section IX-C.3)

IX-15
IX-16

a. Methodology

As discussed previously, we determined the detailed formulations which most closely

reflect the “typical” (sales-weighted average) VOC and chlorinated TAC contents. These

formulations, in turn, were designated as compliant and baseline formulations, respectively. The

average unit size used for these calculations, are the same as the ones used for the VOC products

in the 1999 Consumer Products cost calculations. These unit sizes differ from the ones used for

the chlorinated TAC products in the risk assessment modeling. 

As part of the analysis, we compared the chlorinated TAC formulations with both the

complying and non-complying VOC formulations that were used for the 1999 Consumer

Products cost calculations. The difference in cost was very small, and did not change the final

results mentioned below. VOC formulations listed in the tables reflect the formulations that are

compliant with the 1999 Consumer Products amendments. 

Distributor-level ingredient prices from the Chemical Market Reporter

(November 29, 1999) or from information gathered during the 1999 Consumer Products

regulation were used to calculate the baseline and compliant material costs for these

formulations. As noted previously, we assumed changes in packaging, labeling, distribution and

other recurring costs to be negligible relative to baseline levels of these costs (ARB, 1997c). 

The analyses and the detailed formulations evaluated (with individual weight fractions

and unit prices per pound) are shown as cost spreadsheets in Table IX-5. While these

formulations may not reflect the exact composition of existing noncompliant products and

compliant products that will be marketed, we believe they are reasonably representative for the

purposes of this analysis.

b. Results

As shown in Table IX-6, the raw materials cost for chlorinated TAC products are greater

than for VOC products. Table IX-7 shows a comparison of the impacts to raw materials cost

under the proposed ATCM relative to those of the ARB consumer product regulations. As

shown, the raw materials cost impacts under the proposed limits are comparable to those of other

ARB regulations. 

5. Analysis of the Combined Impacts on Per-Unit Cost from Recurring and

Nonrecurring Costs

In this analysis, we evaluated the combined impacts of both recurring (i.e., raw materials

costs) and nonrecurring costs from the proposed ATCM on per-unit costs. Although the raw

material costs usually constitute the major portion of the compliance costs, the nonrecurring

(fixed) cost was the major contributor in this analysis. In performing this analysis, we used the

fixed costs, raw material costs, assumptions, and other facts discussed previously.
Table IX-5. Annual Recurring Cost Calculations for Raw Materials

Formulation: 2202 Formulation: 2203

Category: Automotive Brake Cleaners Category: Carburetor, Fuel-Injection Cleaners

Formulation and Cost Comparison Formulation and Cost Comparison

Typical Chlorinated TAC 45.00% VOC Typical Chlorinated TAC 45.00% VOC

Unit Cost Formulation Tier-1 Compliant Unit Cost Formulation Tier-1 Compliant

Component $/lb wt% Cost wt% Cost Component $/lb wt% Cost wt% Cost

(A) (B) (C) (B)x(C)/100 (D) (B)x(D)/100 (A) (B) (C) (B)x(C)/100 (D) (B)x(D)/100

acetone 0.140 50.0 0.070 acetone 0.140 50.0 0.070

toluene 0.120 20.0 0.024 toluene 0.120 20.0 0.024

methanol 0.058 15.0 0.009 methanol 0.058 10.0 0.006 5.0 0.003

heptane 0.120 10.0 0.012 xylene 0.140 30.0 0.042 20.0 0.028

carbon dioxide 0.100 10.00 0.010 5.0 0.005 carbon dioxide 0.100 3.0 0.003 5.0 0.005

perchloroethylene 0.350 40.00 0.140 methylene chloride 0.450 57.00 0.257

methylene chloride 0.450 30.00 0.135

trichloroethylene 0.650 20.00 0.130

SUM 100.00% 100.00% SUM 100.00% 100.00%

Total Cost , $/Pound 0.415 0.120 Total Cost , $/Pound 0.307 0.130

% Cost Diff. Relative -71.2% % Cost Diff. Relative -57.7%

to Current Product to Current Product

Total Cost , $/Unit 0.34 0.10 Total Cost , $/Unit 0.25 0.11

Annual Recurring Costs C.E., $/lb TAC Reduced -$0.00 Annual Recurring Costs C.E., $/lb TAC Reduced -$0.00

Assume: (1) 1997 Statewide Emissions of Perc, MeCl, & TCE 4.45 tons/day Assume: (1) Statewide 1997 Emissions of Perc, MeCl, & TCE 0.31 tons/day

 from Automotive Brake Cleaners from Carburetor, Choke Cleaners

(2) Average unit size = 13.00 ounce (2) Average unit size = 13.00 ounce

(**) Cost-effectiveness values in "( )" are negative (**) Cost-effectiveness values in "( )" are negative 

 (i.e., indicates potential cost savings) (i.e., indicates potential cost savings)

IX-17
Table IX-5 (continued). Annual Recurring Cost Calculations for Raw Materials

Formulation: 2204a Formulation: 5203c

Category: Engine Degreasers Category: G.P. Degreaser/Solvent Parts Cleaner (Aerosol)

Formulation and Cost Comparison Formulation and Cost Comparison

Typical Chlorinated TAC 35.00% VOC Typical Chlorinated TAC 50.00% VOC

Unit Cost Formulation Tier-1 Compliant Unit Cost Formulation Tier-1 Compliant

Component $/lb wt% Cost wt% Cost Component $/lb wt% Cost wt% Cost

(A) (B) (C) (B)x(C)/100 (D) (B)x(D)/100 (A) (B) (C) (B)x(C)/100 (D) (B)x(D)/100

HC propellant 0.250 10.0 0.025 carbon dioxide 0.100 5.0 0.005

d-limonene 1.100 10.0 0.110 water 0.002 42.0 0.001

glycol ether 0.460 5.0 0.023 isopropanol 0.340 10.0 0.034

LVP glycol ether 0.700 15.0 0.105 surfactant/emuls 1.900 3.0 0.057

aromatic solvent 0.106 10.0 0.011 glycol ether 0.700 20.0 0.140

water 0.002 39.0 0.001 d-limonene 1.100 20.0 0.220

ammonia 0.098 1.0 0.001 perchloroethylene 0.350 24 0.084

surfactant 1.900 10.0 0.190 111-trichloroethane 1.030 72 0.742

trichloroethylene 0.650 99.0 0.644 carbon dioxide 0.100 4 0.004

carbon dioxide 0.100 1.0 0.001

SUM 100.00% 100.00% SUM 100.00% 100.00%

Total Cost , $/Pound 0.645 0.465 Total Cost , $/Pound 0.830 0.457

% Cost Diff. Relative -27.8% % Cost Diff. Relative -44.9%

to Current Product to Current Product

Total Cost , $/Unit 0.52 0.38 Total Cost , $/Unit 0.78 0.43

Annual Recurring Costs C.E., $/lb TAC Reduced -$0.00 Annual Recurring Costs C.E., $/lb TAC Reduced -$0.00

Assume: (1) 1997 Statewide Emissions of Perc, MeCl, & TCE 0.1 tons/day Assume: (1) 1997 Statewide Emissions of Perc, MeCl, & TCE 0.31 tons/day

 from Engine Degreasers (Aerosols) from G.P. Degreaser/Solvent Parts Cleaner (Aerosol)

(2) Average unit size = 13.00 ounce (2) Average unit size = 15.00 ounce

(**) Cost-effectiveness values in "( )" are negative (**) Cost-effectiveness values in "( )" are negative 

 (i.e., indicates potential cost savings) (i.e., indicates potential cost savings)

IX-18
IX-19

Table IX-6. Estimated Impacts to Raw Materials Cost Per Unit

Estimated Raw Materials costs, $/Unit of Product

Chlorinated TAC

Formulation

(Baseline)

VOC

Formulation

(Compliant)

Cost Difference Between

Compliant and Baseline

Formulations

Code Category (B1) (A1) (A1)-(B1)

2202 Automotive Brake Cleaners $0.34 $0.10 $0.00

2203 Carburetor, Fuel-Injection

Cleaners

$0.25 $0.11 $0.00

2204a Engine Degreasers $0.52 $0.38 $0.00

5203c General Purpose/Solvent Parts

Cleaner (aerosol)

$0.78 $0.43 $0.00

Max Increase $0.00

Table IX-7. Comparison of Raw Materials Cost Impacts for the 

Proposed ATCM and ARB Consumer Product Regulations (unadjusted dollars)

Regulation

Cost Impacts

(Dollars per Unit of Product)

Proposed Chlorinated TAC ATCM $0.00

Mid-Term Measures II, 1999 $0.00 to $0.25

Phase III (Mid-Term Measures 1) Consumer Products Regulation, 1997 $0.00 to $0.60

Hairsprays, 19971($0.10) to $0.45

Phase II Consumer Products Regulation, 1991 <$0.01 to $0.60

1. $0.45/unit reported as a worst-case scenario using high-level of HFC-152a as propellant in “premium” products.
IX-20

a. Methodology

This method differs from the raw materials cost-only analysis in the previous section in that

the nonrecurring cost in this analysis is assumed to be “spread out” (i.e., recouped) through the

entire California sales volume of each product category. Thus, the total annual recurring and

annualized nonrecurring costs reported previously is divided by the number of units sold in

California per year to estimate the per-unit cost increase. The California sales volume for a

product category is estimated by dividing the total TAC emissions (pounds of TAC per year) for

that category by the category’s sales-weighted average TAC content (pounds of TAC per pound

of product).

d. Results

As shown in Table IX-8, the combined fixed and raw material cost changes to per-unit

production costs ranged from no cost increase (net savings or no cost for various categories) to

about $0.09 per unit (engine degreaser). Averaged over the sales volume for each category, the

unit sales-weighted average cost increase is about $0.02 per unit. For comparison purposes, this

is the same unit sales-weighted average cost increase that was estimated for the 1999 Consumer

Products amendments.

6. Cost-Effectiveness

a. Cost Per Pound of Emissions Reduced

Table IX-9 shows the overall results of our cost-effectiveness analysis, with separate

cost-effectiveness fractions representing the annualized nonrecurring and annual recurring costs

(see equations 1 and 3). In general, Table IX-9 shows that the annualized recurring costs

(i.e., raw materials, labeling, packaging, etc.) have a small impact on overall cost-effectiveness

for the affected categories. For the most part, the raw materials cost (i.e., annual recurring cost)

for both VOC and chlorinated TAC products are relatively the same. The most significant

impact on overall cost-effectiveness is from the annualized nonrecurring fixed costs

(i.e., research and development, product testing, etc.). Table IX-9 shows that the estimated

cost-effectiveness ranges from a low of $0.00 (net savings or no cost for several categories) to a

high of about $0.23 per pound of TAC reduced for the general purpose degreaser/solvent parts

cleaner category.

Another useful quantity to report is the emission reductions-weighted average (ERWA)

cost-effectiveness. This value is the sum of the products of the emission reductions for each

product category and its associated cost-effectiveness, divided by the sum of the total emission

reductions for all the product categories. In contrast to a simple arithmetic mean of the reported

cost-effectiveness values, the ERWA cost-effectiveness accounts for the relative magnitude of

emission reductions and the relative efficiency of the proposed ATCM in achieving those

reductions. Thus, the ERWA cost-effectiveness is, in theory, a better indicator of the true

average cost-effectiveness for achieving a pound of reduction under the proposed ATCM. As

shown in Table IX-9, the ERWA cost-effectiveness is about $0.03 per pound of TAC reduced. 
Table IX-8. Estimated Per-Unit Cost Increases from Both Annualized Non-Recurring and Annual Recurring Costs

Estimated Annualized Fixed Cost to Sales-Wtd Estimated Typical Estimated Estimated Per Unit Production Cost Increase

Reformulate All Chlorinated TAC Products Average TAC TAC Unit Unit Sales Annualized Annualized Annual Recurring Total Total Total

(dollars per year) Content Emissions, Weight per Day Nonrecurring Nonrecurring Cost Difference Cost Cost Cost

in Calif. Cost Cost Increase Increase Increase

Low High % tons/day Ounces Low Cost/Unit High Cost/Unit Cost/Unit Low/Unit High/Unit Mid/Unit

Code Category (D1) (D2) (E) (F) (G) (H) (I1=D1*CNF/H) (I2=D2*CNF/H) (J) K1=(I1+J) K2=(I2+J) (K1+K2)/2

2202 Automotive Brake Cleaners $61,784 $792,100 90.0% 4.45 13 12,171 $0.00 $0.02 $0.00 $0.00 $0.02 $0.01

2203 Carburetor, Fuel-Injection Cleaners $18,368 $235,489 57.0% 0.31 13 1,339 $0.00 $0.06 $0.00 $0.00 $0.06 $0.03

2204a Engine Degreasers $10,019 $128,449 47.0% 0.10 13 524 $0.01 $0.09 $0.00 $0.01 $0.09 $0.05

5203c G.P. Degreaser/Solvent Parts Cleaner (Aerosol) $20,038 $256,897 24.0% 0.31 15 2,756 $0.00 $0.03 $0.00 $0.00 $0.03 $0.02

SUM $110,209 $1,412,936 5.170 16,789 MIN UNIT COST INCREASE $0.00

MAX UNIT COST INCREASE $0.09

SWA-UNIT COST INCREASE $0.02

Notes: 

(1) (H) = (Estimated TAC Emissions/Sales-Wtd Ave TAC Content)*2000*16/Typical Unit Weight

(2) (I) = Total Annualized Non-recurring Cost / [(H) * 365]

(3) (J) = Raw material cost difference between compliant and baseline formulations from Table IX-6

(4) Figures in "( )" are negative (i.e., indicates potential cost savings)

(5) California-to-National Cost Adjustment Factor (CNF)= 0.13

(6) Annual Recurring Cost Difference from Table IX-3

IX-21
Table IX-9. Estimated Cost-Effectiveness for Proposed ATCM (Cost per Pound of Pollutants Reduced)

Estimated Annualized Fixed Cost to 1997 Estimated Reformulation Costs Estimated Cost-Effectiveness

Reformulate All Chlorinated TAC Products Emission (in 1999 dollars) $/lb TAC reduced 

(dollars per year) Reduc. Annualized Non-Recurring Cost Annual Recurring Cost (in 1999 dollars)

tons/day $/lb TAC Reduced $/lb TAC Reduced

Low High Low High Low High Ave

Code Category (D1) (D2) (L) M1 = D1*(CNF)/L M2 = D1*(CNF)/L (N) O1=(M1+N) O2=(M2+N) (O1+O2)/2

2202 Automotive Brake Cleaners $61,784 $792,100 4.450 $0.00 $0.03 -$0.00 $0.00 $0.03 $0.02

2203 Carburetor, Fuel-Injection Cleaners $18,368 $235,489 0.310 $0.01 $0.14 -$0.00 $0.01 $0.14 $0.07

2204a Engine Degreasers $10,019 $128,449 0.100 $0.02 $0.23 -$0.00 $0.02 $0.23 $0.12

5203c G.P. Degreaser/Solvent Parts Cleaner (Aerosol) $20,038 $256,897 0.310 $0.01 $0.15 -$0.00 $0.01 $0.15 $0.08

Grand Total $110,209 $1,412,936 5.170 MIN G(1) $0.00

MAX G(2) $0.23

ERWA-AVG $0.03

Notes:

(1) Avg. Cost-Effectiveness shown as "$0.00" means the average of the low and high cost-effectiveness for the category was either 0 or negative. Total industry-wide annual compliance costs = $99,003

(2) ERWA = emission reduction-weighted average [(ERWA-AVG)*(L)*(365 days/year)*(2000 lbs/ton)]

(3) Cost-effectiveness values in "( )" are negative (i.e., indicates potential cost savings)

(4) Non-recurring fixed costs annualized by multiplying with the Cost Recovery Factor (CRF)

(5) "Emission Reductions" (Column L) reflect 1997 Consumer and Commercial Products Survey results adjusted for market coverage of the survey.

(6) For non-recurring costs, "low" and "high" refer to range of estimated fixed costs discussed in Section IX-D.3.

California-to-National Cost Adjustment Factor (CNF)= 0.13

IX-22
IX-23

Thus, the average cost to reduce one pound of chlorinated TACs under the proposed ATCM is

less than five cents, indicating that total industry-wide annual compliance costs to achieve a

reduction of 5.17 tons per day of chlorinated TACs statewide in 1997 should be approximately

$99,000 per year. 

Table IX-10 shows a comparison of the cost-effectiveness for the proposed ATCM

relative to the Perchloroethylene Dry Cleaning Operations ATCM. Of the nine ATCMs adopted

by the Board, this is the only one which controls one of the TACs addressed in the proposed

ATCM.

Table IX-10. Comparison of Cost-Effectiveness (Pound of Pollutant Reduced)

Airborne Toxic Control Measure Cost-Effectiveness

Proposed Chlorinated TAC ATCM $0.00 to $0.23 ($0.03 avg.)

(Cost per pound of Perc, MeCl, and TCE reduced)

Perchloroethylene Dry Cleaning Operations ATCM,

1993

$0.64-1.77 ($1.29 avg.)

(Cost per pound of Perc reduced)

(adjusted to 1999 dollars)1

1. Cost-effectiveness values for Dry Cleaning ATCM adjusted to 1999 dollars using the following Chemical Engineering Plant Cost indices:

359.2 (1993), 392.0 (Preliminary August 1999) from Chemical Engineering, November 1999. 

b. Cost Per Potential Cancer Case Avoided

By removing Perc, MeCl, and TCE from the four automotive consumer product

categories, the emission and health impact (i.e., potential cancer risk) reduction benefits are

100 percent. This correlates to a total of 5.17 tons per day emissions reduction of chlorinated

TACs. Additionally, based on a 70 year exposure duration, a reduction of approximately 65 total

potential excess cancer cases statewide could be achieved by removal of Perc, MeCl, and TCE

from the four automotive product categories.

To determine the reduction of 65 potential excess cancer cases statewide, we used

ambient concentrations and emissions data as presented in Chapter VI. We then determined the

individual potential cancer risk for each compound based on its ambient concentration and

multiplied this by the percentage of emissions from the four automotive product categories. 

Finally, we multiplied this number by California’s 1997 population of 33 million. Of the

65 potential cancer cases avoided, approximately 57 are attributed to Perc, 4 to TCE, and 4 to

MeCl.

To evaluate the relative impact and effectiveness of the proposed control measure, we

calculated the cost per cancer case avoided. We again use Equation (1) to calculate cost

effectiveness, but instead of using “annual mass reduction in TACs” in the denominator, we use
Table IX-11. Estimated Cost-Effectiveness for Proposed ATCM (Cost per Cancer Case Avoided)

Estimated Cost-Effectiveness

Estimated Annualized Fixed Cost to Total Annualized Recurring Cost Total Regulation $/Cancer Cases Avoided

Reformulate All Non-Compliant Products (Raw Materials Cost) Cost

(dollars per year) ($/Pound of Product) ($/year) Low High Ave

Code Category Low (D1) High (D2) (P) (Q1=(D1*CNF)+P) (Q2=(D2*CNF)+P) R1=(Q1*70 yrs/cases) R2=(Q2*70 yrs/cases) (R1+R2)/2

2202 Automotive Brake Cleaners $61,784 $792,100 $0.00 $8,032 $102,973 $8,676.43 $111,236.32 $59,956.38

2203 Carburetor, Fuel-Injection Cleaners $18,368 $235,489 $0.00 $2,388 $30,614 $2,579.48 $33,070.26 $17,824.87

2204a Engine Degreasers $10,019 $128,449 $0.00 $1,302 $16,698 $1,406.99 $18,038.32 $9,722.66

5203c G.P. Degreaser/Solvent Parts Cleaner (Aerosol) $20,038 $256,897 $0.00 $2,605 $33,397 $2,813.98 $36,076.65 $19,445.31

Grand Total $110,209 $1,412,936 $0.00 $14,327 $183,682 $15,477 $198,422 $106,949

MIN Q(1) $1,406.99

MAX Q(2) $111,236.32

Notes: AVERAGE $25,927.08

(1) Cost-effectiveness values in "( )" are negative (i.e., indicates potential cost savings)

(2) Non-recurring fixed costs annualized by multiplying with the Cost Recovery Factor (CRF)

(3) For non-recurring costs, "low" and "high" refer to range of estimated fixed costs discussed in Section IX-E.

(4) Total Annual Recurring Cost = [raw material cost difference ($/pound) multiplied by the number of non-complying products] multiplied by 10 years, which is the project horizon

California-to-National Cost Adjustment Factor (CNF)= 0.13

Total Potential Excess Cancer Cases Avoided (cases) = 64.8

IX-24
IX-25

the “number of cancer cases avoided.” Table IX-11 shows the average cost per cancer case

avoided is about $26,000 with a range of approximately $1,400 to $111,000. 

Table IX-12 shows a comparison of the cost-effectiveness for the proposed ATCM

relative to other ARB control measures. As shown, the staff’s proposal is significantly less than

previously approved ARB control measures.

Table IX-12. Comparison of Cost-Effectiveness (Cancer Case Avoided) for

Proposed ATCM and other ARB Control Measures (adjusted to 1999 dollars)

Airborne Toxic Control Measure

Cost-Effectiveness1,2

(Dollars per Cancer Case Avoided)

Proposed Chlorinated TAC ATCM $1,400-111,000

Perchloroethylene Dry Cleaning Operations ATCM, 1993 $1.9-4.8 million

Ethylene Oxide ATCM for Sterilizers and Aerators, 1990 $2.1-3.2 million

Emissions of Toxic Metals from Non-Ferrous Metal Melting, 1992 $6,600-$18.6 million

1. Cost-effectiveness values for ATCMs are based on size of the facility, amount and type of equipment required to meet the control limits, and

which control limit is to be met.

2. All cost-effectiveness values have been adjusted to 1999 dollars using the following Chemical Engineering Plant Cost indices: 357.6 (1990),

358.2 (1992), 359.2 (1993), 392.0 (Preliminary August 1999).
X-1

X. ENVIRONMENTAL IMPACTS OF THE PROPOSED AIRBORNE

TOXIC CONTROL MEASURE

The intent of the proposed airborne toxic control measure (ATCM) is to protect the

public health by reducing the public’s exposure to potentially harmful emissions of TACs. An

additional consideration is the impact that the proposed ATCM may have on other areas of the

environment. Based on available information, the ARB has determined that no significant

adverse environmental impacts should occur. This chapter describes the potential impacts that

the proposed ATCM may have on waste water treatment, hazardous waste disposal, and air

pollution.

A. Legal Requirements Applicable to the Analysis

The California Environmental Quality Act (CEQA) and ARB policy require an analysis

to determine the potential adverse environmental impacts of proposed regulations. Since the

ARB’s program involving the adoption of regulations has been certified by the Secretary of

Resources (see Public Resources Code section 21080.5), the CEQA environmental analysis

requirements are allowed to be included in the Initial Statement of Reasons for a rulemaking in

lieu of preparing an environmental impact report or negative declaration. In addition, the ARB

will respond in writing to all significant environmental issues raised by the public during the

public review period or at the Board hearing. These responses will be contained in the Final

Statement of Reasons for the ATCM.

Public Resources Code section 21159 requires that the environmental impact analysis

conducted by ARB include the following: (1) an analysis of the reasonably foreseeable

environmental impacts of the methods of compliance; (2) an analysis of reasonably foreseeable

feasible mitigation measures; and, (3) an analysis of reasonably foreseeable alternative means of

compliance with the ATCM. Regarding reasonably foreseeable mitigation measures, CEQA

requires an agency to identify and adopt feasible mitigation measures that would minimize any

significant adverse environmental impacts described in the environmental analysis. 

B. Potential Waste Water Impacts

Sanitation districts have been concerned about the amount of chlorinated compounds

found in the waste effluent at treatment plants. Currently, many treatment plants do not have the

equipment necessary to process industrial wastes such as chlorinated solvents and these solvents

have been detected at elevated levels at some facilities. Over the last several years, increased

influent concentrations of Perc were observed at four wastewater treatment plants (Pomona

Water Reclamation Plant, City of Los Angeles’ Donald C. Tillman Water Reclamation Plant,

Joint Water Pollution Control Plant, and East Bay Municipal Utilities District). The influent

concentrations of Perc have been high enough to potentially cause violations of the plants’ 
X-2

discharge limit of 5 micrograms per liter (μg/L). The data collected from the wastewater

treatment plants for 1999 showed median influent levels of 17 μg/L, 78 μg/L, 8 μg/L, and

4 μg/L, respectively (CSDLA, 1999a; CSDLA 1999b). 

The number of stationary and mobile parts washers being used in AMR facilities has

increased over the years to meet federal, state, and local regulations adopted to address

environmental and health concerns. Publicly-owned treatment works (POTWs) have been

concerned about the disposal practices of the spent baths, which are usually classified as

hazardous waste and cannot be disposed in the sewer system. In some cases, unused cleaners are

also considered hazardous waste. A study conducted in Southern California showed that about

three-quarters of spent water baths were classified as hazardous waste. None of these spent baths

met discharge standards set by local POTWs or sanitary sewerage districts (DTSC, 1999a).

The removal of Perc, MeCl, and TCE from the four automotive consumer products

categories should lead to a reduction in the amount of chlorinated solvents reaching the storm

drains and the waste water treatment plants.

C. Potential Hazardous Waste Impacts

Hazardous waste is regulated in California by both federal and state programs. In

California, all hazardous waste must be disposed of at a facility that is registered with the

California Department of Toxic Substances Control (DTSC). Under these programs, chlorinated

automotive consumer products are generally classified as hazardous waste because they contain

substances which are listed as toxic substances.

An AMR facility will generate spent chlorinated solvent from stationary and portable

parts washers and from liquid solvent that is used to wash parts over a collection drum. A

hazardous waste hauler is usually contracted to remove the spent solvent from the facility. For a

monthly fee, waste haulers will pick-up the spent solvent, clean and maintain the solvent

cleaning unit, and refill the unit with clean solvent. Depending on the arrangement, solvent

cleaning units may be owned by the shop or leased from a solvent service company. The waste

hauler will then recycle the spent solvent to reclaim the chlorinated substances which can then be

resold. Based on information collected during site visits, spent baths (as well as other waste

disposal containers) contaminated with chlorinated compounds are typically more costly to have

removed from the facility.

It is expected that the proposed ATCM may increase the usage of stationary and portable

parts washers. The removal of Perc, MeCl, and TCE from automotive consumer products will

minimize the possibility of chlorinated solvents contaminating aqueous baths, waste oil

containers, and hazardous waste disposal drums thereby significantly reducing hazardous waste

contamination and disposal costs.
X-3

D. Potential Air Pollution Impacts

1. Potential Increase in VOC Emissions

The Consumer Products Regulation reduces the formation of tropospheric, or

ground-level, ozone by reducing VOC emissions from consumer products. Tropospheric ozone

formation requires a mix of VOCs, nitrogen oxides, oxygen, and sunlight. Therefore, a reduction

in VOC emissions is expected to provide a beneficial environmental impact on air quality and

public health by reducing tropospheric ozone formation. Based on the results of the

1997 Consumer and Commercial Products Survey, the products from the four automotive

consumer product categories emitted approximately 14.6 tons per day (tpd) of VOCs in

California (ARB, 1999b). 

The October 1999 amendments to the Consumer Products Regulation are expected to

obtain a reduction of 3.3 tpd in VOC emissions from automotive consumer products

(ARB, 1999b). However, the removal of Perc, MeCl, and TCE as formulation options in the

proposed ATCM will adversely impact the reduction in VOC emissions that otherwise would

have been realized. Chlorinated automotive consumer products account for approximately

38 percent of the market and their removal will reduce emissions of Perc, MeCl, and TCE by

approximately 5.2 tpd (approximately 3.8 million pounds per year) as shown in Table X-1.

Table X-1. Statewide Emissions of Perc, MeCl, and TCE

from Automotive Consumer Products

Perc Emissions 

[tons/day]

MeCl Emissions 

[tons/day]

TCE Emissions 

[tons/day]

Total Chlorinated 

[tons/day]

4.2 0.7 0.3 5.2

If we assume a worse case scenario where all current users of chlorinated products switch to

non-chlorinated, VOC-based products with Perc, MeCl, and TCE replaced with VOC compounds

(irrespective of any current VOC-based formulation limits), then the theoretical increase in

statewide VOC emissions would be approximately 5.2 tpd. However, beginning

January 1, 2002, the VOC-content of automotive consumer products is subject to VOC-content

limits as specified in the October 1999 amendments to the Consumer Products Regulation. As a

result of these technically-feasible limits, post-ATCM VOC emissions would increase by no

more than 2.3 tpd statewide. Table X-2 summarizes the potential increase in VOC emissions.
X-4

Table X-2. Potential Maximum Increase in VOC Emissions from

a Switch to VOC-Based Non-Chlorinated Products

Product Category VOC Limit

[%]

Potential VOC Emissions

[tons/day]

Brake Cleaners 45 2.00

Carburetor Cleaners 45 0.14

Engine Degreasers 35 0.04

General Purpose Degreasers 50 0.16

Total (approx.) 2.3

ARB staff expects, however, that some users of chlorinated automotive consumer

products will choose to consider other non-chlorinated alternatives (such as aqueous-based

portable brake cleaning units and parts washers) and not switch exclusively to non-chlorinated

VOC products. If this occurs, the increase in VOC emissions related to the proposed ATCM

would be less than 2.3 tpd statewide. When total VOC emission reductions from both the

October 1999 amendments to the Consumer Products Regulation and the proposed ATCM are

considered, statewide VOC emissions from the four automotive consumer products categories

are reduced by at least one ton per day. These reductions are summarized in Table X-3.

Table X-3. Approximate Emission Reductions from Proposed ATCM

and October 1999 Consumer Products Amendments1

Chlorinated TAC Reductions

[tons/day]

VOC Reductions

[tons/day]

5.2 1.0

 1. Total combined emission reductions from the October 1999 Consumer Products

Amendments and the proposed ATCM.

2. Impacts on the State Implementation Plan for Ozone

The Federal Clean Air Act amendments of 1990 require an ozone attainment plan from

every state unable to meet the national ambient air quality standard for ozone. California’s

1994 State Implementation Plan (SIP) for ozone fulfills this requirement (ARB, 1994). State law

provides the legal authority to ARB to develop regulations affecting a variety of mobile sources,

fuels, and consumer products. The regulations that have already been adopted, and measures

proposed for adoption constitute the ARB’s portion of the SIP. The SIP serves as a road map to

guide California to attain and maintain the national ambient air quality standard for ozone. The
X-5

SIP was submitted to the U.S. EPA on November 15, 1994, and the consumer products element

was formally approved on August 21, 1995.

As previously mentioned, the proposed ATCM decreases the potential VOC reductions

that will be obtained by the October 1999 amendments to the Consumer Products Regulation

while achieving substantial reductions in emissions of chlorinated TACs. Perc was considered a

VOC in the 1994 ozone SIP inventory; therefore, substituting non-chlorinated VOC-based

products to replace Perc will have no impact on the 1994 SIP (which covers Ventura County, the

Sacramento Metropolitan area, the San Joaquin Valley, San Diego County, and the Southeast

Desert). In the context of the 1994 SIP, substituting VOC-based products for MeCl will increase

VOC emissions by approximately 0.1 tpd in all the 1994 SIP areas combined.

The South Coast Air Quality Management District (SCAQMD) revised their federal

ozone plan in 1999, and the U.S. EPA has proposed to approve this plan. In the 1999 revision,

Perc is not considered a VOC. In the context of the 1999 revision, if VOC-based products are

substituted for all the Perc and MeCl currently used in chlorinated products, we expect an

increase of approximately one ton per day of VOC in the South Coast Air Basin. The ARB and

the SCAQMD will address this shortfall in the next comprehensive revision of the South Coast

ozone SIP.

3. Potential Environmental Impacts on Global Warming and Stratospheric Ozone

Depletion

Greenhouse gases, which alter the amount of heat, or infrared radiation, that can escape

the Earth’s surface, have been linked to a gradual warming of the Earth’s surface and lower

atmosphere. While carbon dioxide (CO2) has been the traditional focus of greenhouse gas

concerns, other greenhouse gases include methane, nitrous oxide, and chlorofluorocarbons

(U.S. EPA, 1998a). In the United States, the largest source of greenhouse gas emissions is from

fossil fuel combustion, which accounted for approximately 81 percent of greenhouse gas

emissions in 1996 (U.S. EPA, 1998a). 

Carbon dioxide is used as a propellant in both chlorinated and non-chlorinated aerosol

automotive consumer products. Based on data from the 1997 Consumer and Commercial

Products Survey, non-chlorinated products typically contain a greater amount of carbon dioxide

than their chlorinated counterparts. Since the proposed ATCM does not require a reduction of

the amount of aerosol products sold, many users of chlorinated products may switch to

non-chlorinated products thereby increasing the amount of carbon dioxide released. However,

the use of carbon dioxide as a propellant in automotive consumer products typically results from

a recycled by-product of existing processes and, therefore, does not contribute to global warming

(ARB, 1995a). Additionally, non-chlorinated aerosols account for nearly 62 percent of the

market. As a result, the proposed ATCM is expected to have a negligible impact on global

warming.
X-6

4. South Coast Air Quality Management District Air Toxics Control Plan

The South Coast Air Quality Management District (South Coast AQMD) is currently in

the process of developing a comprehensive control plan designed to obtain significant reduction

of toxic emissions in the South Coast Air Basin (SCAB). The plan will address current air toxic

levels, control strategies, and projected future air toxic emission levels. The removal of Perc,

MeCl, and TCE from automotive consumer products will greatly assist the efforts of the South

Coast AQMD in their efforts to reduce toxic emissions. It is expected that the proposed ATCM

will reduce toxic emissions in the SCAB by approximately 2.6 tpd. Additionally, combined with

the October 1999 amendments to the Consumer Products Regulation, VOC emissions should be

reduced by almost 0.5 tpd.

5. Workplace Exposure

The California Department of Industrial Relations-Division of Occupational Safety and

Health Administration (Cal/OSHA) regulates the concentration of many TACs and VOCs in the

workplace environment. To protect worker safety, Cal/OSHA has established a permissible

exposure limit (PEL) for many of these compounds (the PEL is the maximum, eight-hour,

time-weighted average concentration for occupational exposure). The combined effect of both

the proposed ATCM and the October 1999 amendments to the Consumer Products Regulation is

a reduction in VOC emissions. As a result, an increase in workplace exposure from TAC

emissions and VOC emissions is not expected.

E. Formation of Phosgene

Phosgene is a toxic, colorless, gas or volatile liquid with a suffocating odor that is similar

to decaying fruit or moldy hay. It is slightly soluble in water and freely soluble in benzene,

toluene, glacial acetic acid, chloroform, and most liquid hydrocarbons. Phosgene is

noncombustible but can decompose into hydrochloric acid (HCl) and CO2 when wetted. As a

result, wet phosgene is corrosive and poses an additional hazard from pressure buildup in closed

containers. The density of phosgene is more than three times that of air, which means that its

concentrated emission plumes tend to settle to the ground and collect in low areas (ARB, 1997b). 

Phosgene is listed as a TAC and a federal HAP.

Phosgene, also known as carbonyl chloride, is not a normal component of welding gases,

can be formed by the thermal decomposition of chlorinated hydrocarbons (e.g., Perc, TCE, and

TCA) when welding is carried out in the presence of solvent vapors. These solvent vapors may

be escaping from a nearby degreasing tank, a recently expelled aerosol product, or when solvent

is left behind after degreasing (NOHSC, 1999a). Phosgene formation is promoted by ultraviolet

radiation, hot metal surfaces, flame, and cigarette smoking (NOHSC, 1999a). The gas-shielded

arc welding processes and plasma processes provide greater ultraviolet light intensity than the

flux-shielded arc welding processes. Additionally, heat and ultraviolet radiation from the

welding arc may react with solvent vapor to produce irritant gases such as acetylchloride and
X-7

acetylchloride derivatives such as dichloroacetylchloride. There is also evidence of phosgene

formation from the photooxidation of chloroethylenes in air such as Perc and TCE

(U.S. EPA, 1985).

Acute non-cancer affects are of the most concern. Phosgene is extremely irritating to the

lungs, and can cause severe respiratory effects, including pulmonary edema. Symptoms of acute

exposure include choking, chest constriction, coughing, painful breathing, and bloody sputum. 

Acute phosgene poisoning may affect the heart, brain, and blood. Symptoms may be delayed up

to 24 hours after exposure. Chronic inhalation exposure has been shown to result in some

tolerance to acute effects noted in humans, but irreversible emphysema and pulmonary fibrosis

may occur (ARB, 1997b). The National Institute for Occupational Safety and Health (NIOSH)

lists a recommended exposure limit of 0.1 parts per million for phosgene. The U.S. Occupational

Safety and Health Administration (OSHA) also lists a PEL of 0.1 parts per million

(NIOSH, 1994).

Recognizing these health and safety concerns, both OSHA and Cal/OSHA have taken

steps to limit worker exposure to phosgene. OSHA Regulations state that degreasing and

cleaning operations that involve chlorinated hydrocarbons shall be located so that vapors from

these operations will not reach or be drawn into the area that surrounds any welding operation

(Standards-29 CFR, General requirements, Section 1910.252). In addition, compounds such as

Perc and TCE should be kept out of areas penetrated by ultraviolet radiation of gas-shielded

welding operations. Cal/OSHA regulations for electric welding state that chlorinated solvents

shall not be used within 200 feet (61 meters) of the exposed arc. Furthermore, surfaces prepared

with chlorinated solvents should be thoroughly dry before welding is performed on them

(California Code of Regulations, Subchapter 7, Group 11, Article 90, Section 4853).

The removal of Perc, MeCl, and TCE from automotive consumer products in the

proposed ATCM will minimize the potential for phosgene formation in the presence of flame or

heat sources thereby extending a greater level of worker and public health protection and safety.

F. Potential Flammability of Products that Contain VOCs

The June 1997 Status Report, based on the limited data available at the time, considered

the flammability of many non-chlorinated aerosols to be a disadvantage when compared to

chlorinated aerosols which are typically non-flammable (ARB, 1997a). Industry groups

representing product manufacturers have also underscored this concern stating their belief that

AMR facilities need to continue their usage of the more toxic chlorinated aerosols, especially in

areas where use may occur near flame, heat, or other ignition sources. Since the release of the

Status Report, however, more data regarding flammability has become available. A search of

statewide and national databases as well as inquiries to fire departments and associations across

the state were unable to locate any reports of fires, injuries, or other incidents related to the use of

non-chlorinated products in AMR facilities. Additionally, the California State Fire Marshal’s
X-8

office indicated that the combustion of gasoline, such as from a leaking fuel line, poses a

significantly greater flammability concern than the use of aerosols.

During the 137 site visits, ARB staff observed brake service operations at one facility

using a flammable, non-chlorinated aerosol product occurring in one service bay and welding

operations occurring in another service bay. ARB staff also observed chlorinated products that

were listed as flammable on the product label, which indicates that chlorinated products can also

be flammable.

Sixteen additional site visits were conducted to specifically investigate flammability

issues. Of these facilities, all 16 used flammable products (non-chlorinated and chlorinated) but

only 14 had an ignition source. The types of ignition sources observed included: welding (e.g.

arc) equipment, torch (e.g. acetylene) equipment, cigarettes, and space heaters (natural gas and

propane, portable, and overhead). Usage of flammable products occurred from approximately

20 to 30 feet from the ignition source with most usage occurring in adjacent service bays. Only

one facility reported an incident (non-injury) associated with the use of a flammable product. 

This facility, however, attributed the incident to a vehicle malfunction and continues to use

flammable products almost exclusively. Additionally, none of the facilities visited indicated that

flammability concerns were a factor when making decisions on which products to buy (cost was

the major factor). Instead, discussions with facility operators indicated that most facilities

consider all aerosol products flammable and use common safety precautions when using these

products Therefore, flammability is sufficiently addressed by the use of good operating practices

on the part of facility owners, mechanics, and technicians. This belief is supported by the fact

that most facilities already use a host of flammable products and that non-flammable alternatives

such as aqueous-based portable brake cleaning units and water-based aerosol products are readily

available and in use.

G. Reasonably Foreseeable Feasible Mitigation Measures

As previously discussed, ARB is required to do an analysis of reasonably foreseeable

feasible mitigation measures. ARB staff has concluded that no significant adverse environmental

impacts should occur from implementation of the proposed ATCM. As a result, no mitigation

measures would be necessary.

H. Reasonably Foreseeable Alternative Means of Compliance with the ATCM

The ARB is required to do an analysis of reasonably foreseeable alternative means of

compliance with the ATCM. Alternatives to the proposed ATCM are discussed in Chapter VII. 

Based on the discussion in Chapter VII, ARB staff has concluded that the removal of MeCl and

TCE from automotive consumer products is appropriate and necessary because of the potential

increased use and, therefore, potential increased risk if the use of these two compounds was not

so limited. For the same reasons, staff has concluded that the removal of Perc, MeCl, and TCE
X-9

from carburetor cleaners, engine degreasers, and general purpose degreasers, as well as from

brake cleaners, is appropriate and necessary.
XI-1

XI. REFERENCES

AQMD, 2000. Personal Communication with Jim Guthrie (Bay Area Air Quality Management

District), Ben Shaw (South Coast Air Quality Management District), and Mike Gazet

(Sacramento Metropolitan Air Quality Management District) on hourly cost of district inspectors

on January 27, 2000 and February 2, 2000.

ARB, 1989. Technical Support Document, Proposed Identification of Methylene Chloride as a

Toxic Air Contaminant, Part B Report, California Air Resources Board, May 1989. 

ARB, 1990a. Staff Report/Executive Summary, and Part B, Proposed Identification of

Trichloroethylene as a Toxic Air Contaminant, California Air Resources Board, August 1990.

ARB, 1990b. Proposed Regulation to Reduce Volatile Organic Compound Emissions from

Consumer Products, California Air Resources Board, Technical Support Document,

August 1990.

ARB, 1991a. Initial Statement of Reasons for Rulemaking, Staff Report/Executive Summary,

and Part B, Proposed Identification of Perchloroethylene as a Toxic Air Contaminant, California

Air Resources Board, August 1991.

ARB, 1991b. Proposed Amendments to the Statewide Regulation to Reduce Volatile Organic

Compound Emissions from Consumer Products - Phase II, Technical Support Document,

California Air Resources Board, October 1991.

ARB, 1993a. Technical Support Document: Proposed Airborne Toxic Control Measure

And Proposed Environmental Training Program for Perchloroethylene Dry Cleaning

Operations, California Air Resources Board, August 1993.

ARB, 1993b. The Identification of Federal Hazardous Air Pollutants as Toxic Air Contaminants,

California Air Resources Board, June 1993.

ARB, 1994. The California State Implementation Plan for Ozone, Volume II, California Air

Resources Board, November 15, 1994.

ARB, 1995. Initial Statement of Reasons for Proposed Amendments to the California

Regulations for Reducing Volatile Organic Compound Emissions from Antiperspirants and

Deodorants, Consumer Products and Aerosol Coatings, California Air Resources Board,

August 11, 1995.
XI-2

ARB, 1996a. Initial Statement of Reasons for Proposed Amendments to the California

Regulations for Reducing Volatile Organic Compound Emissions from Consumer Products and

Aerosol Coating Products, California Air Resources Board, October 4, 1996.

ARB, 1996b. Curriculum for the Environmental Training Program for Perchloroethylene

Dry Cleaning Operations, California Air Resources Board, August 1996.

ARB, 1997a. Perchloroethylene Need Assessment for Automotive Consumer Products: Status

Report, California Air Resources Board, June 1997.

ARB, 1997b. Toxic Air Contaminant Identification List - Summaries, California Air Resources

Board, September 1997.

ARB, 1997c. Initial Statement of Reasons for Proposed Amendments to the California

Consumer Products Regulation, Volume II, California Air Resources Board, June 6, 1997.

ARB, 1997d. Initial Statement of Reasons for Proposed Amendments Pertaining to Hairspray in

the California Consumer Products Regulation, Volume II, California Air Resources Board,

February 7, 1997.

ARB, 1997e. Emission Inventory Criteria and Guidelines for the Air Toxics “Hot Spots”

Program, California Air Resources Board, May 15, 1997.

ARB, 1998. ARB Memo from Dilip Patel to Mark Carlock on County and Subcounty

Population Distributions for Calendar Years 1995 and 1996, May 28, 1998.

ARB, 1999a. Data retrieved from CEIDARS (California Emission Inventory Development and

Reporting System), Data from data base year 1998, Technical Support Division, Special

Pollutants Emission Inventory Section, Run date: October 20, 1999. 

ARB, 1999b. Initial Statement of Reasons for Proposed Amendments to the California

Consumer Products Regulation, California Air Resources Board, September 10, 1999.

BAR, 1997. Telephone conversation with Rob Oglesby, California Department of

Consumer Affairs, Bureau of Automotive Repair, and Tina Najjar on March 13, 1997. 

BOE, 1997a. Fax received March 5, 1997 from the Board of Equalization office in

Sacramento.

BOE, 1997b. Telephone conversation with Wun-Chi Wang, Board of Equalization, and

Mark Williams on March 5, 1997. 
XI-3

Brake Pad Partnership Steering Committee, 1999. Telephone conversation with Kelley Moran of

the Brake Pad Partnership Steering Committee and Mark Williams on January 12, 1999.

Cal/EPA, 1996. Memorandum “Economic Analysis Requirements for the Adoption of

Administrative Regulations” to Cal/EPA Executive Officers and Directors from Peter M.

Rooney, Undersecretary; December 6, 1996 and “Cal/EPA Guidelines for Evaluating

Alternatives to Proposed Major Regulations”, California Environmental Protection Agency.

CAPCOA, 1993. CAPCOA Air Toxics “Hot Spots” Program - Revised 1992 Risk Assessment

Guidelines, Toxics Committee of the California Air Pollution Control Officer Association

(CAPCOA), October 1993.

Chemical Engineering, Publication of Chemical Week Associates, November 1999.

Chemical Market Reporter, Schnell Publishing Company, November 29, 1999.

CRC, 1998. Workshop presentation by Richard Miller of CRC, March 17, 1998.

CSDLA, 1999a. Correspondence on June 29, 1999, from County Sanitation Districts of Los

Angeles County to South Coast Air Quality Management District (SCAQMD) regarding possible

water quality impacts from SCAQMD aqueous cleaning rules.

CSDLA, 1999b. Correspondence on September 20, 1999, from County Sanitation Districts of

Los Angeles County to California Air Resources Board regarding Perc in Consumer Engine

Degreasing Products.

DTSC, 1999a. “Switching to Water-Based Cleaners in Repair and Maintenance Parts Cleaning”,

Prepared by: Institute for Research and Technical Assistance’s Pollution Prevention Center. 

California Department of Toxic Substances Control. Office of Pollution Prevention and

Technology Development. February 1999.

Federal-Mogul, 1999. Telephone conversation with Rick Kroeger of Federal-Mogul (Wagner)

and Mark Williams on November 15, 1999.

IRTA, 1999. “Brake Cleaning in Auto Repair Facilities: The Conversion to Water,” prepared by

Mike Morris and Katy Wolf of the Institute for Research and Technical Assistance (IRTA) for

the United States Environmental Protection Agency, September 1999.

MarketScope, 1996. “1996 Brake Repair Study”, prepared by MarketScope for Brake and Front

End Magazine, May 1996.
XI-4

NIOSH, 1994. NIOSH Pocket Guide to Chemical Hazards, U.S. Department of Health and

Human Services, National Institute for Occupational Safety and Health, publication no. 94-116,

June 1994.

NOHSC, 1999a. Gases, National Occupational Health & Safety Commission, Commonwealth

of Australia, Internet site: http://www.nohsc.gov.au/publications/fulltext/docs/h6/946.htm,

November 17, 1999.

Norton, 1993. “Usage of Chemical Brake Cleaners in Automotive Repair Facilities”, 

John Norton, School of Business Administration, George Mason University, Fairfax, VA,

November 8, 1993.

OEHHA, 1997. Telephone conversation with Melanie Marty, Manager, Air Risk Assessment

Unit, Office of Environmental Health Hazard Assessment, and Greg Harris on May 1, 1997.

OEHHA, 1999a. Air Toxic Hot Spots Program Risk Assessment Guidelines, Part I, The

Determination of Acute Reference Exposure Levels for Airborne Toxicants, Office of

Environmental Health Hazard Assessment (OEHHA), March 1999.

OEHHA, 1999b. Air Toxic Hot Spots Program Risk Assessment Guidelines, Part II, Technical

Support Document for Describing Available Cancer Potency Factors, Office of Environmental

Health Hazard Assessment (OEHHA), April 1999.

OEHHA, 1999c. State of California, Environmental Protection Agency, Office of Environmental

Health Hazard Assessment, Safe Drinking Water and Toxic Enforcement Act of 1986, Chemical

Known To The State To Cause Cancer And Reproductive Toxicity, Office of Environmental

Health Hazard Assessment, August 1999. 

Peters and Timmerhaus, 1980. Plant Design and Economics for Chemical Engineers, 3rd edition,

McGraw-Hill Book Company, Peters, Max S. and Klaus D. Timmerhaus, 1980, pp.160-162.

Raybestos, 1999. Telephone conversation with Wally Marciniak, Brake Service Subsidiary of

Raybestos, and Mark Williams on August 19, 1999.

U.S. Economic Census, 1992. Government Information Sharing Project, Information

Services, Oregon State University, Internet Site: http://govinfo.kerr.orst.edu/, March 5, 1997.

U.S. EPA, 1985. Locating and Estimating Air Emissions from Sources of Phosgene, 

EPA-450/4-84-007i, United States Environmental Protection Agency (U.S. EPA), 

September 1985.
XI-5

U.S. EPA, 1994a. National Emission Standards for Hazardous Air Pollutants: Halogenated

Solvent Cleaning, 40 CFR Parts 9 and 63, EPA-453/R-94-071, United States Environmental

Protection Agency (U.S. EPA), Research Triangle Park, North Carolina, Federal Register:

December 2, 1994.

U.S. EPA, 1995a. ISCST3 Model User’s Guide, EPA-454/B-95-003a, United States

Environmental Protection Agency (U.S. EPA), Research Triangle Park, North Carolina,

September 1995.

U.S. EPA, 1995b. SCREEN3 Model User’s Guide, EPA-454/B-95-004, United States

Environmental Protection Agency (U.S. EPA), Research Triangle Park, North Carolina,

September 1995.

U.S. EPA. 1995c, Guidance for Risk Characterization, United States Environmental Protection

Agency (U.S. EPA) Science Policy Council. February 1995.

U.S. EPA, 1998a. Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-1996,

EPA 236-R-98-006, United States Environmental Protection Agency (U.S. EPA), March 1998.
Appendix A

Proposed Regulation Order

Airborne Toxic Control Measure

for Emissions of Chlorinated Toxic Air Contaminants

from Automotive Maintenance and Repair Activities
A-1

PROPOSED REGULATION ORDER

AIRBORNE TOXIC CONTROL MEASURE

FOR EMISSIONS OF CHLORINATED TOXIC AIR CONTAMINANTS

FROM AUTOMOTIVE MAINTENANCE AND REPAIR ACTIVITIES

Adopt new section 93111, title 17, California Code of Regulations, to read as follows:

17 CCR, section 93111. Chlorinated Toxic Air Contaminants Airborne Toxic Control

Measure--Automotive Maintenance and Repair Activities. 

(a) Applicability

(1) Except as provided in subdivision (b), this section applies to any person who sells,

supplies, offers for sale, or manufactures automotive consumer products for use in

automotive maintenance or repair activities in California.

(2) This section also applies to the owner or operator of any automotive maintenance facility

or automotive repair facility that uses automotive consumer products in California.

(b) Exemptions

(1) This section does not apply to any automotive consumer product manufactured in

California for shipment and use outside of California.

(2) This section does not apply to a manufacturer or distributor who sells, supplies or offers

for sale in California an automotive consumer product that does not comply with the

standards specified in subdivision (d) if the manufacturer or distributor can demonstrate

to the satisfaction of the Executive Officer both of the following: (A) the automotive

consumer product is intended for shipment and use outside of California, and (B) the

manufacturer or distributor has taken reasonable prudent precautions to assure that the

automotive consumer product is not sold, offered for sale, or distributed in California. 

This subdivision (2) does not apply to manufacturers or distributors of automotive

consumer products if the products are sold, supplied, or offered for sale by any person to

retail outlets in California.

(c) Definitions. For the purposes of this section, the following definitions apply:

(1) “Aerosol Product” means a pressurized spray system that dispenses product ingredients

by means of a propellant or mechanically induced force. Any user-pressurized system

that uses compressed air as a propellant is considered to be an “Aerosol Product”. 

“Aerosol Product” does not include pump sprayers.
A-2

(2) “ASTM” means the American Society for Testing and Materials.

(3) “Automotive Consumer Product” for the purposes of this section, means any of the

following chemically formulated aerosol products or liquid products used in automotive

maintenance or repair activities: (A) brake cleaners, (B) carburetor or fuel-injection air

intake cleaners, (C) engine degreasers, and (D) general purpose degreasers intended for

use in automotive maintenance or repair activities.

(4) “Automotive Maintenance Facility or Automotive Repair Facility (Facility)” means any

establishment at which a person repairs, rebuilds, reconditions, services, or maintains in

any way, motor vehicles. “Facility” includes entities required to be registered by the

California Department of Consumer Affairs, Bureau of Automotive Repair, and entities

that service or repair a fleet of ten or more motor vehicles. “Facility” does not include

private residences or entities that are involved only in motor vehicle body work or

painting. 

(5) “Automotive Maintenance or Repair Activities” means any service, repair, restoration, or

modification activity to a motor vehicle in which cleaning or degreasing products could

be used including, but not limited to, brake work, engine work, machining operations, and

general degreasing of engines, motor vehicles, parts, or tools.

(6) “Brake Cleaner” means a cleaning product designed, labeled, promoted or advertised

(expressed or implied) to remove oil, grease, brake fluid, brake pad material or dirt from

motor vehicle brake mechanisms and parts.

(7) “Carburetor or Fuel-Injection Air Intake Cleaner” means a product designed, labeled,

promoted or advertised (expressed or implied) to remove fuel deposits, dirt, or other

contaminants from a carburetor, choke, throttle body of a fuel-injection system, or

associated linkages. “Carburetor or fuel-injection air intake cleaner” does not include

products designed exclusively to be introduced directly into the fuel lines or fuel storage

tank prior to introduction into the carburetor or fuel injectors.

(8) “CAS Registry Number” is a unique accession number assigned by the Chemical

Abstracts Service, a division of the American Chemical Society.

(9) “Chlorinated Toxic Air Contaminant” for the purposes of this section, means methylene

chloride, perchloroethylene, or trichloroethylene.

(10) “Consumer” means any person who seeks, purchases, or acquires any automotive

consumer product for use in automotive maintenance and repair activities. Persons

acquiring an automotive consumer product for resale are not “consumers” for that

product.
A-3

(11) “Distributor” means any person to whom an automotive consumer product is sold or

supplied for the purposes of resale or distribution in commerce, except that

manufacturers, retailers, and consumers are not distributors.

(12) “Engine Degreaser” means a cleaning product designed, labeled, promoted or advertised

(expressed or implied) to remove grease, grime, oil or other contaminants from the

external surfaces of engines and other mechanical parts.

(13) “Executive Officer” means the Executive Officer of the California Air Resources Board,

or his or her delegate.

(14) “General Purpose Cleaner” means a product designed for general all-purpose cleaning, in

contrast to cleaning products designed to clean specific substrates in certain situations. 

“General Purpose Cleaner” includes products designed for general floor cleaning, kitchen

or counter top cleaning, and cleaners designed to be used on a variety of hard surfaces.

(15) “General Purpose Degreaser” means any product designed, labeled, promoted or

advertised (expressed or implied) to remove or dissolve grease, grime, oil and other

oil-based contaminants from a variety of motor vehicle substrates or surfaces or

miscellaneous metallic parts. “General Purpose Degreaser” does not include “Engine

Degreaser”or “General Purpose Cleaner”.

(16) “Liquid” means a substance or mixture of substances which is capable of a visually

detectable flow as determined under ASTM D-4359-90 which is incorporated by

reference. “Liquid” does not include powders or other materials that are composed

entirely of solid particles.

(17) “Liquid Product” means any product that is packaged and sold as a bulk liquid including

liquid delivered by pump sprayers.

(18) “Manufacturer” means any person who imports, manufactures, assembles, produces,

packages, repackages, or relabels an automotive consumer product.

(19) “Methylene Chloride” (CAS Registry Number 75-09-2) means the compound with the

chemical formula 'CH2Cl2', also known by the name ‘dichloromethane’, which has been

identified by the Air Resources Board and listed as a toxic air contaminant in

section 93000, and which is a hazardous air pollutant designated as a toxic air

contaminant in section 93001.

(20) “Motor Vehicle” means a self-propelled device by which any person or property may be

propelled, moved, or drawn upon a highway, excepting a device moved exclusively by

human power or used exclusively upon stationary rails or tracks. "Motor vehicle" does

not include a self-propelled wheelchair, invalid tricycle, or motorized quadricycle when
A-4

operated by a person who, by reason of physical disability, is otherwise unable to move

about as a pedestrian.

(21) “Owner or Operator” means a person who is the owner or the operator of an automotive

maintenance facility or an automotive repair facility.

(22) “Perchloroethylene (Perc)” (CAS Registry Number 127-18-4) means the compound with

the chemical formula 'C2Cl4', also known by the name ‘tetrachloroethylene’, which has

been identified by the Air Resources Board and listed as a toxic air contaminant in

section 93000, and which is a hazardous air pollutant designated as a toxic air

contaminant in section 93001.

(23) “Person” means “person” as defined in Health and Safety Code section 39047.

(24) “Pump Sprayer” means a packaging system in which the product ingredients within the

container are not under pressure and in which the product is expelled only while a

pumping action is applied to a button, trigger or other actuator.

(25) “Retailer” means any person who sells, supplies, or offers for sale automotive consumer

products directly to consumers.

(26) “Retail Outlet” means any establishment at which automotive consumer products are

sold, supplied, or offered for sale directly to consumers.

(27) “Trichloroethylene” (CAS Registry Number 79-01-6) means the compound with the

chemical formula 'C2HCl3', also known by the name ‘TCE’, which has been identified by

the Air Resources Board and listed as a toxic air contaminant in section 93000, and which

is a hazardous air pollutant designated as a toxic air contaminant in section 93001.

(d) Standards for Automotive Consumer Products

(1) Except as provided in subdivision (b), subdivision (e) and subdivision (g), after the

effective dates specified in the following Table of Standards no person shall sell, supply,

offer for sale, or manufacture for sale in California any automotive consumer product

that, at the time of sale or manufacture, contains methylene chloride, perchloroethylene or

trichloroethylene. 
A-5

Table of Standards

Product Category Effective Date

Brake Cleaner December 31, 2002

Carburetor or December 31, 2002

Fuel-injection Air Intake Cleaners

Engine Degreaser December 31, 2002

General Purpose Degreaser December 31, 2002

(2) For the purposes of subdivision (d)(1), a product “contains methylene chloride,

perchloroethylene or trichloroethylene” if the product contains 1.0 percent or more by

weight (exclusive of the container or packaging) of any one of the compounds methylene

chloride, perchloroethylene, or trichloroethylene as determined by the test method

specified in subdivision (h).

(3) No owner or operator of an automotive maintenance facility or automotive repair facility

shall use an automotive consumer product prohibited under subdivision (d)(1) after

June 30, 2005.

(e) Sell-through of products

(1) Notwithstanding the provisions of subdivisions (d)(1) and (d)(2), an automotive

consumer product manufactured prior to the effective date specified for that product

category in the Table of Standards may be sold, supplied, or offered for sale for up to

18 months after the specified effective date.

(2) This subdivision (e) does not apply to any automotive consumer product if that product

does not display, on the product container or package, the date on which the product was

manufactured or a code indicating such date.

(f) Administrative Requirements - Code-Dating

(1) Each manufacturer of an automotive consumer product subject to this section shall clearly

display on each automotive consumer product container or package, the day, month, and

year on which the product was manufactured, or a code indicating the day, month, and

year of manufacture. This date or code-date shall be displayed on each automotive

consumer product container or package manufactured on or after the date no later than

twelve months prior to the effective date of the applicable standard specified in

subsection (d). No person shall erase, alter, deface or otherwise remove or make illegible
A-6

any date or code-date from any regulated product container or package without the

express authorization of the manufacturer.

(2) If a manufacturer uses a code indicating the date of manufacture for any automotive

consumer product subject to this section, the manufacturer shall file an explanation of the

code with the Executive Officer of the ARB no later than twelve months prior to the

effective date of the applicable standard specified in subdivision (d).

(g) Variances

(1) Applications for variances. Any person who cannot comply with the requirements set

forth in subdivision (d) because of extraordinary reasons beyond the person’s reasonable

control may apply in writing to the Executive Officer for a variance. The variance

application shall set forth:

(A) the specific grounds upon which the variance is sought;

(B) the proposed date(s) by which compliance with the provisions of subdivision (d)

will be achieved; and

(C) a compliance report reasonably detailing the method(s) by which compliance will

be achieved.

(2) Notices and public hearings for variances. Upon receipt of a variance application

containing the information required in subdivision (g)(1), the Executive Officer will hold

a public hearing to determine whether, under what conditions, and to what extent, a

variance from the requirements in subdivision (d) is necessary and will be permitted. The

Executive Officer will initiate a hearing no later than 75 days after receipt of a variance

application. The Executive Officer will send notice of the time and place of the hearing

to the applicant by certified mail not less than 30 days prior to the hearing. The Executive

Officer will submit notice of the hearing for publication in the California Regulatory

Notice Register, and not less than 30 days prior to the hearing, the Executive Officer will

send a notice to every person who requests such notice. The notice will state that the

parties may, but need not, be represented by counsel at the hearing. At least 30 days prior

to the hearing, the Executive Officer will make the variance application available to the

public for inspection. The Executive Officer will allow interested members of the public

a reasonable opportunity to testify at the hearing and will consider their testimony.

(3) Treatment of confidential information. Information submitted to the Executive Officer by

a variance applicant may be claimed as confidential, and such information will be

handled in accordance with the procedures specified in sections 91000-91022. The

Executive Officer may consider such confidential information in reaching a decision on a

variance application.
A-7

(4) Necessary findings for granting variances. The Executive Officer will not grant a

variance unless the Executive Officer finds that:

(A) because of reasons beyond the reasonable control of the applicant, requiring

compliance with subdivision (d) would result in extraordinary economic hardship

to the applicant; and

(B) the public interest in mitigating the extraordinary hardship to the applicant by

issuing the variance outweighs the public interest in avoiding any increased

emissions of toxic air contaminants that would result from issuing the variance;

and

(C) the compliance report proposed by the applicant can reasonably be implemented

and will achieve compliance as expeditiously as possible.

(5) Variance orders. Any variance order will specify a final compliance date by which the

requirements of subdivision (d) will be achieved. Any variance order will contain a

condition that specifies increments of progress necessary to assure timely compliance,

and such other conditions that the Executive Officer, in consideration of the testimony

received at the hearing, finds necessary to carry out the purposes of Division 26 of the

Health and Safety Code.

(6) Situations in which variances will cease to be effective. A variance will cease to be

effective upon failure of the party to whom the variance was granted to comply with any

term or condition of the variance.

(7) Modification and revocation of variances. Upon the application of any person, the

Executive Officer may review, and for good cause, modify or revoke a variance from

requirements of subdivision (d) after holding a public hearing in accordance with the

provisions of subdivision (g)(2).

(h) Test Methods

(1) Air Resources Board Method 310, Determination of Volatile Organic Compounds (VOC)

in Consumer Products, adopted September 25, 1997, and as last amended on

November 16, 1999, is incorporated herein by reference. Sections 3.5 and 3.7 will be

used to perform the testing to determine compliance with the requirements of this section.

(2) References to “VOC” in Method 310 mean “chlorinated toxic air contaminants” when

Method 310 is used to determine compliance with this section.

(3) Alternative methods which are shown to accurately determine the concentration of

methylene chloride, perchloroethylene, or trichloroethylene in a subject product or its

emissions may be used upon written approval of the Executive Officer.
A-8

Authority cited: Sections 39600, 39601, 39650, 39655, 39656, 39658, 39659, 39665, and 39666, 

Health and Safety Code.

Reference: Sections 39002, 39600, 39650, 39655, 39656, 39658, 39659, 39665, 39666, and

40000, Health and Safety Code.
Appendix B

Surveys
B-1

Survey 1. Brake Cleaner and Perc-Containing Automotive Products Survey
B-2

INSTRUCTIONS FOR COMPLETING THE

BRAKE CLEANER AND PERC-CONTAINING AUTOMOTIVE PRODUCTS SURVEY

GENERAL INSTRUCTIONS

C Please type or print legibly in ink when filling out the survey form.

C Please review the instructions and the survey form prior to filling out the form.

C We suggest that you make extra copies of the form.

C If you have any questions on the survey or the information we have requested, please

contact Mark Williams of the Air Resources Board (ARB) staff at (916) 327-5633.

C In order to get accurate data from this survey, we would appreciate it if you would consult

your actual sales records for determining California sales.

C In filling out the survey form if you encounter any questions which do not apply in your

situation, please enter “N/A” in the appropriate blanks. 

C If you wish to clarify the information supplied by your company or would like to make

additional comments, please use Section V to enter your comments. In clarifying the

information your company has supplied, please refer to the appropriate table, column, and

row or product name. 

SECTION I. COMPANY INFORMATION

Company Name: Enter the entire company name.

Division Name: If the respondent to the survey is representing a division of the

company please enter the division name. If the respondent to the

survey is representing several divisions being reported under one

company, please enter the additional division names in Section IV:

Other Information at the end of the survey.

Contact Person: Enter the name of the person to be contacted by the ARB if

clarifications are needed.

Address: Enter the mailing address of the company or division responsible for

completing the survey.

Manufacturer/

Distributor:

Check the corresponding box to indicate whether you are a

manufacturer or a distributor or both.

Phone/Fax

Number:

Enter the phone and fax numbers of the contact person.

Confidential

Information:

If you would like us to treat this information and data in a confidential

manner, please check the box at the bottom of Section I.

E-mail Address: Enter the E-mail address of the contact person, if available.
B-3

SECTION II. BRAKE CLEANER PRODUCT INFORMATION

 Column Instructions

C 1, 8: List all of the products that your company either makes, formulates, fills for

another company, or distributes. After having listed all the applicable products in

column 1 of Section II., copy the product names in column 8 of the continuation

section (Section II.) at the foot of the page. Be sure to list them in the same order.

C 2: For those products which you either fill for another company, or distribute, please

list the manufacturer’s name in Section V, Other Comments. 

C 3: Enter the product form as either (A)erosol, (L)iquid, (P)ump spray, (G)el, (S)olid,

or (O)ther. If the product falls into the “Other” category, please specify the form

in Section V, Other Comments.

C 4: What is the weight (ounces) of the product in the container or dispenser? If the

product comes in more than one size, list the different sizes as separate entries. It

is permissible to report the product size in fluid ounces or gallons, but we request

that you enter either the product density in grams per milliliter (g/ml) or its

specific gravity (see Section III.).

C 5-7: What is the number of units of product sold or distributed in California 

(column 5)? If there are multiple sizes, list the number of units sold or distributed

for each size. We are also interested in who the end users are. What percentage

of the units are sold for industrial use in shops which do automotive brake repair

and servicing (column 6)? What percentage of the units are sold through a retail

store for individual or home use (column 7)?

C 9: Write in the percentage of Perc by weight contained in the product. If this is a

non-chlorinated product, please list the main ingredients in Section V, Other

Comments.

C 10: Does the product meet the Volatile Organic Compound (VOC) limit of 50 percent

content by weight as required by Article 2 of the Consumer Products Regulation?

(Title 17, California Code of Regulations, Section 94509)

C 11-13: These columns deal with product reformulation. In column 11, please enter

whether your company intends to reformulate the product by simply answering

“yes” or “no”. In column 12 we would like you to enter an estimated date when

the product will be reformulated, if applicable. This date would be when the

product is estimated to be sold as a commercial product. If the product is to be

reformulated, please enter whether the Perc content will increase as a result of the

reformulation along with an estimate of what the new Perc content (percent

weight) will be (column 13). 
B-4

SECTION III. LIQUID BRAKE CLEANERS

 Column Instructions

C 1: Enter any products from Section II. which come in liquid form. These products

would be those where “L” is entered in column 3 of Section II.

C 2: What is the volume (fluid ounces or gallons) of the product in the container or

dispenser? If the product comes in more than one size, list the different sizes as

separate entries. Please note that we are asking for the amount of product

measured by volume, and not by weight as was requested in column 4 of 

Section II.

C 3: Please enter either the product density in grams per milliliter (g/ml) or its specific

gravity.

C 4: After product purchase for industrial or home use, does the product need to be

diluted prior to its use or application?

C 5,6: If the producted is diluted, what is the recommended amount of product (column

5) for the given amount of diluent (column 6) per the container instructions? 

Please specify whether the amounts are given in terms of volume or weight and

the units.

C 7: If the product is diluted, what is the recommended diluent per the instructions?

SECTION IV. OTHER AUTOMOTIVE PRODUCTS CONTAINING PERC

 Column Instructions

C 1: This column lists other products which could contain Perc. 

C 2: Please answer “Yes” or “No” in the blank by each product category whether your

company manufactures, formulates, fills, or distributes that type of product. For

those products which you either fill for another company, or distribute, please list

the manufacturer’s name in Section V, Other Comments.

C 3: If you answered yes in column 2 to any of the product categories, please answer

whether the product(s) contain Perc?

C 4-6: These columns deal with product reformulation. In column 4, please enter

whether your company intends to reformulate the product by simply answering

“yes” or “no”. In column 5 we would like you to enter an estimated date when the

product will be reformulated, if applicable. This date would be when the product

is estimated to be sold as a commercial product. If the product is to be

reformulated, please enter whether the Perc content will increase as a result of the

reformulation along with an estimate of what the new Perc content (percent

weight) will be (column 6).
B-5

SECTION V. OTHER COMMENTS

If you wish to clarify the information you have supplied or make additional miscellaneous

comments on the survey, please enter the comments in this box. In clarifying the information

your company has supplied, please refer to the appropriate table, column and row or product

name. 
Revised March 26, 1997 B-6 SSD/EAB/MDW

BRAKE CLEANER AND PERC-CONTAINING AUTOMOTIVE PRODUCTS SURVEY

(Please use extra sheets if necessary)

SECTION I. COMPANY INFORMATION

COMPANY NAME ADDRESS

DIVISION NAME

CONTACT PERSON CITY STATE ZIP

MANUFACTURER? 9 DISTRIBUTOR? 9

PHONE ( ) FAX ( )

CHECK THE BOX IF THIS INFORMATION IS CONFIDENTIAL? 9

E-MAIL ADDRESS

SECTION II. BRAKE CLEANER PRODUCT INFORMATION (Please see attached instructions)

COLUMN 1 2 3 4 5 6 7

PRODUCT NAME OWN

PRODUCT

LINE?

FORM NET SIZE

(Weight in

ounces)

UNITS SOLD IN

CALIFORNIA

INSTITUTIONAL/

INDUSTRIAL

SALES (%)

RETAIL/

HOUSEHOLD

SALES (%)

SECTION II. BRAKE CLEANER PRODUCT INFORMATION (Continued)

COLUMN 8 9 10 11 12 13

PRODUCT NAME PERC

CONTENT

(Weight

percent)

MEETS

50% VOC

LIMIT?

WILL PRODUCT

BE

REFORMULATED

ESTIMATED

REFORMULATION

DATE

WILL PERC

CONTENT INCREASE

WITH

REFORMULATION?
Revised March 26, 1997 B-7 SSD/EAB/MDW

SECTION III. BRAKE CLEANER PRODUCT INFORMATION (For liquids only)

COLUMN 1 2 3 4 5 6 7

PRODUCT NAME NET SIZE

(Fluid oz.

or gallons)

DENSITY(g/ml)/

SPECIFIC

GRAVITY

IS THE PRODUCT

DILUTED?

AMOUNT OF

PRODUCT

AMOUNT OF

DILUENT

TYPE OF

DILUENT

SECTION IV. OTHER AUTOMOTIVE PRODUCTS CONTAINING PERC

COLUMN 1 2 3 4 5 6

PRODUCT

CATEGORY

DO YOU

MANUFACTURE A

PRODUCT IN THIS

CATEGORY?

DOES IT CONTAIN

PERC?

WILL THE

PRODUCT BE

REFORMULATED?

ESTIMATED

REFORMULATION

DATE

WILL PERC

CONTENT

INCREASE WITH

REFORMULATION?

Brake Anti-squeal

compounds

Bug and tar removers

Carburetor and choke

cleaners

Engine Degreasers

Lubricants (excluding

engine oil)

Penetrants

Undercoatings

Upholstery fabric

cleaners

SECTION V. OTHER COMMENTS
Revised March 26, 1997 B-8 SSD/EAB/MDW

CONFIDENTIAL INFORMATION SUBMITTAL FORM

If you wish to designate any information contained in your survey data as CONFIDENTIAL

INFORMATION, please provide the data requested below and return it with your completed survey

form.

In accordance with Title 17, California Code of Regulations (CCR), Section 91000 to 91022, and

the California Public Records Act (Government Code Section 6250 et seq.), the information that a

company provides to the Air Resources Board (ARB) may be released (1) to the public upon request,

except trade secrets which are not emissions data or other information which is exempt from disclosure or

the disclosure of which is prohibited by law, and (2) to the Federal Environmental Protection Agency

(EPA), which protects trade secrets as provided in Section 114(c) of the Clean Air Act and amendments

thereto (42 USC 7401 et seq.) and in federal regulation, and (3) to other public agencies provided that

those agencies preserve the protections afforded information which is identified as a trade secret, or

otherwise exempt from disclosure by law (Section 39660(e)).

Trade secrets as defined in Government Code Section 6254.7 are not public records and therefore

will not be released to the public. However, the California Public Records Act provides that air pollution

emission data are always public records, even if the data comes within the definition of trade secrets. On

the other hand, the information used to calculate information is a trade secret.

If any company believes that any of the information it may provide is a trade secret or otherwise

exempt from disclosure under any other provision of law, it must identify the confidential information

as such at the time of submission to the ARB and must provide the name address, and telephone

number of the individual to be consulted, if the ARB receives a request for disclosure or seeks to

disclose the data claimed to be confidential. The ARB may ask the company to provide documentation of

its claim of trade secret or exemption at a later date. Data identified as confidential will not be disclosed

unless the ARB determines, in accordance with the above referenced regulations, that the data do not

qualify for a legal exemption from disclosure. The regulations establish substantial safeguards before any

such disclosure.

In accordance with the provisions of Title 17, California Code of Regulations, Section 91000 to

91022, and the California Public Records Act (Government Code Sections 6250 et seq.),

Company Name: declares that all the

information submitted in response to the California Air Resources Board's information request on the

brake cleaner and perc-containing automotive products survey is confidential "trade secret" information,

and request that it be protected as such from public disclosure. All inquiries pertaining to the

confidentiality of this information should be directed to the following person:

Date: Mailing Address:

 (Signature) 

 (Printed Name)

 (Title)

(Telephone Number)
B-9

Survey 2. Brake/Automotive Repair Shop Survey
Last updated: December 23, 1997 B-10

BRAKE/AUTOMOTIVE REPAIR SHOP SURVEY

Date: 

Facility: 

Address: 

 

Cross Street: 

Contact: Title: 

Phone #: 

SHOP DESCRIPTION

The approximate dimensions of the entire shop area, include units (m. or ft.). Interior dimensions include

storage and other areas not partitioned off as separate rooms. Exterior dimensions include all connecting

structures.:

Interior Height , Width , Length 

Exterior Height , Width , Length 

UTM from 1 corner: 

Type(s) of ventilation used: 

Wall fan G Ceiling or exhaust fan G open doors G other 

If fan is used give fan specifications (i.e. CFM, or horsepower & size) 

 Nominal Dimensions (include units) 

Number and ave. size of servicing bays: L W 

Number of normally open doors: H W 

Number of normally open windows: H W 

Number of normally open servicing bay doors: H W 

Nearest offsite receptor distance (incl. units):

Business UTM Direction from facility (in degrees) 

Residential UTM Direction from facility (in degrees) 

Distance from the facility building to the facility fence line 
Last updated: December 23, 1997 B-11

Provide a sketch of the facility, any adjoining structures (for example: if facility is attached to a strip mall

or similar), orientation of the nearest receptor, and indicate the direction North):
Last updated: December 23, 1997 B-12

SHOP DESCRIPTION (continued)

Normal business operating schedule (e.g. M-F 7am-7pm, Sat-Sun 10am-4pm):

 

How many bays are used for brake services? 

Are ventilation practices different between mild and inclement weather? Explain:

 

 

OPERATION DESCRIPTION

Number of employees: 

Average number of employees in service area each day: 

Number of people performing brake services each day: 

Number of automotive services performed per week: 

Number of automobiles requiring brake work per week: 

Number of axles serviced per week: 

Amount of time to perform a brake job (1 or 2 axles) 

Are there Proposition 65 warnings posted? 

Comments: 

 

PRODUCT INFORMATION

Number of different brake cleaning product(s) used: 

Has the shop used any other type of brake cleaner? If so, what type of product was used? What was the

outcome? Is there a preference of the type of product used? 

 

If an aqueous type product is used, please list shop’s reasons for using product (i.e. product cheaper, etc.)

 

If an aqueous product is used, has drying time been a concern in the brake repairs? (Explain)

If an aerosol product is used, list the reasons or situations why the product is used instead of an aqueous

product 

Are the brakes wiped with rags after using the aerosol spray? 

If yes, how are the rags stored and disposed of? 

If used, what is the approximate fate of all Perc usage (e.g. 50% air, 40% reclaimed for proper disposal, 9% sewer,

1% storm drain) 
Last updated: December 23, 1997 B-13

1.

PRODUCT INFORMATION (continued)

Ask for a unit of the product(s) used to inspect the label; copy the following information:

Product name: 

Manufacturer: 

Address: Phone #: 

e-mail: 

Part Number: UPC Code: 

size: (fl oz., wt oz, gal.) Code date: 

Product form: Aerosol G Liquid G Pump Spray G Other 

Active ingredients: 

 

% Perc: 

Usage (application) information: 

 

Does the product require dilution (Y / N)

Dilute of product into of

 (amount product) (units) (amount diluent) (units)

 Apply with 

 (diluent used) (application equipment used, wipe, spray bottle, etc.)

Number of product units used per week by facility 

Volume of diluted product used in a week 

Number of cans aerosol used per brake job 

Is the product used for any other application other than brakes? If so what other applications is it used for

(i.e. general degreasing, etc.): 

How often and how much of the product used for other purposes: 

 (give time frame and amount used)

Did you see a demonstration of the product in use? 
Last updated: December 23, 1997 B-14

2.

PRODUCT INFORMATION (continued)

Ask for a unit of the product(s) used to inspect the label; copy the following information:

Product name: 

Manufacturer: 

Address: Phone #: 

e-mail: 

Part Number: UPC Code: 

size: (fl oz., wt oz, gal.) Code date: 

Product form: Aerosol G Liquid G Pump Spray G Other 

Active ingredients: 

 

% Perc: 

Usage (application) information: 

 

Does the product require dilution (Y / N)

Dilute of product into of

 (amount product) (units) (amount diluent) (units)

 Apply with 

 (diluent used) (application equipment used, wipe, spray bottle, etc.)

Number of product units used per week by facility 

Volume of diluted product used in a week 

Number of cans aerosol used per brake job 

Is the product used for any other application other than brakes? If so what other applications is it used for

(i.e. general degreasing, etc.): 

How often and how much of the product used for other purposes: 

 (give time frame and amount used)

Did you see a demonstration of the product in use? 
Last updated: December 23, 1997 B-15

3.

PRODUCT INFORMATION (continued)

Ask for a unit of the product(s) used to inspect the label; copy the following information:

Product name: 

Manufacturer: 

Address: Phone #: 

e-mail: 

Part Number: UPC Code: 

size: (fl oz., wt oz, gal.) Code date: 

Product form: Aerosol G Liquid G Pump Spray G Other 

Active ingredients: 

 

% Perc: 

Usage (application) information: 

 

Does the product require dilution (Y / N)

Dilute of product into of

 (amount product) (units) (amount diluent) (units)

 Apply with 

 (diluent used) (application equipment used, wipe, spray bottle, etc.)

Number of product units used per week by facility 

Volume of diluted product used in a week 

Number of cans aerosol used per brake job 

Is the product used for any other application other than brakes? If so what other applications is it used for

(i.e. general degreasing, etc.): 

How often and how much of the product used for other purposes: 

 (give time frame and amount used)

Did you see a demonstration of the product in use? 
Last updated: December 23, 1997 B-16

General comments/observations: 

 
B-17

Survey 3. Automotive Service Facility Questionaire
B-18

AUTOMOTIVE SERVICE FACILITY

QUESTIONNAIRE

(Please type or print legibly in ink)

I. LABEL AND CONTACT INFORMATION

The peel-off label on your envelope is designed to speed questionnaire processing. Please cross out any errors

in your facility name or address, print the correct information on the label, and affix it to Section I. where indicated. If

the label has been damaged, you may print or type the information requested. Additionally, please enter your phone

number and a contact person in the space provided.

Affix the ARB label provided on the envelope here.

FACILITY NAME: CONTACT PERSON:

ADDRESS:

CITY: ZIP: PHONE ( )

II. SOLVENT USAGE INFORMATION

Do you use brake cleaners, engine degreasers, carburetor cleaners, or multi-purpose lubricants in your facility?

NO STOP; Ensure Section I. is complete and return the survey package to us in the enclosed envelope.

YES CONTINUE; Proceed to Section III.

III. GENERAL PRODUCT INFORMATION

Indicate the average number of brake jobs your facility performs each week and the amount of product used for

each brake job. For aerosols, usage will be in cans per job; for bulk liquids, usage will be in ounces per job. Also

indicate whether you use a water-based brake washer for brake parts cleaning (e.g., Safety-Kleen, Ammco, Bird Bath,

etc.) The sections below ask more specific questions about the products you use. 

Approximately how many brake jobs does your facility perform each week? ___________

If aerosol cans are used, approximately how many cans are used per brake job? ___________

If bulk liquid brake cleaners are used, approximately how many ounces are used per brake job? ___________

Do you use a water-based brake washer? Yes No

IV. AEROSOL BRAKE CLEANER INFORMATION

C For each aerosol brake cleaning product your facility uses, list the product name,

manufacturer (for example: Berryman, CRC, Radiator Specialty Corp., etc.) and product

size (in ounces) as listed on the product label.

C Enter the 12 digit number located at the bottom of the bar code (the numbers

circled in the example to the right). Be sure to include the single digits to the left

and right of the bars. If the product label does not have a bar code, please enter

the part number, if available.
B-19

IV. AEROSOL BRAKE CLEANER INFORMATION (continued)

C Estimate how many cans of product the facility uses each week. Your estimate should include all product

used, even if the product is used for other purposes such as general purpose cleaning.

PRODUCT NAME MANUFACTURER PRODUCT

SIZE (oz.)

12 DIGIT BAR CODE NUMBER

OR PART NUMBER

NUMBER OF

CANS USED PER

WEEK

V. BULK LIQUID BRAKE CLEANER INFORMATION

Complete this section for bulk liquid brake cleaners. Fill out the information the same way as for Section IV.,

but in column 3 - PRODUCT SIZE, list the volume of the product in gallons and in column 5 - AMOUNT USED PER

MONTH, list the average amount of product used in gallons per month.

PRODUCT NAME MANUFACTURER PRODUCT

SIZE (gal.)

12 DIGIT BAR CODE NUMBER

OR PART NUMBER

AMOUNT USED

PER MONTH

VI. AEROSOL AUTOMOTIVE PRODUCTS

Complete this section for engine degreasers, carburetor cleaners, and multi-purpose lubricants used by your

facility and not listed in Section IV. Fill out the information the same way as for Section IV. Please make additional

copies of the survey form if more space is needed.

PRODUCT NAME MANUFACTURER PRODUCT

SIZE (oz.)

12 DIGIT BAR CODE NUMBER

OR PART NUMBER

NUMBER OF

CANS USED PER

WEEK

Do you wish to be notified of upcoming workshops/meetings? YES NO

Please mail your questionnaire back to us in the enclosed business reply envelope by January 27, 1998. If you

have any questions on the questionnaire or the information we have requested, please contact Mark Williams of

the Air Resources Board staff at (916) 327-5633.

(12/97) 
B-20

Survey 4. Vehicle Maintenance and Repair Facility Flammability Survey
Last updated: November 03, 1999 B-21

VEHICLE MAINTENANCE AND REPAIR FACILITY FLAMMABILITY SURVEY

Date: 

Facility: 

Address: 

 

Contact: Title: 

Phone #: 

GENERAL INFORMATION

Do any of the employees smoke while performing vehicle maintenance or repair? Yes G No G

Types of ignition sources (flame or heat) within facility:

Welding G Torch G Propane space heater G Lit cigarettes G AC Leak sensor w/ flame G

Fan-forced portable space heater G other 

Specific ventilation practices associated with use of ignition (flame or heat) sources: 

Wall fan G Ceiling or exhaust fan G open doors G other 

If an ignition source is present (flame or heat), what is the general proximity of the source to

where automotive consumer products are being used? (feet, next bay, etc.) 

 

Number of different automotive cleaning product(s) used: 

Have there been any accidents or incidents related to the use of flammable products? 

Yes G No G

If yes, state number and explain incident(s): 

 

For the different type of automotive products used in the facility, has product flammability ever

been a factor in choosing one product over another? Yes G No G

If yes, why?: 

 
Last updated: November 03, 1999 B-22

PRODUCT INFORMATION

Ask for a unit of the product(s) used to inspect the label; copy the following information:

1. Product Type:

G Brake Cleaner G Carburetor Cleaner G Engine Degreaser G General

Degreaser G Other: 

Product name: 

Manufacturer: 

Part # or UPC code: 

Product form: Aerosol G Liquid G Pump Spray G Other 

Listed on label as Flammable? Yes G No G

Chlorinated? Yes G No G

Notes: 

 

2. Product Type:

G Brake Cleaner G Carburetor Cleaner G Engine Degreaser G General Degreaser 

G Other: 

Product name: 

Manufacturer: 

Part # or UPC code: 

Product form: Aerosol G Liquid G Pump Spray G Other 

Listed on label as Flammable? Yes G No G

Chlorinated? Yes G No G

Notes: 

 

3. Product Type:

G Brake Cleaner G Carburetor Cleaner G Engine Degreaser G General Degreaser 

 G Other: 

Product name: 

Manufacturer: 

Part # or UPC code: 

Product form: Aerosol G Liquid G Pump Spray G Other 

Listed on label as Flammable? Yes G No G

Chlorinated? Yes G No G

Notes: 

 
Last updated: November 03, 1999 B-23

PRODUCT INFORMATION (continued)

4. Product Type:

G Brake Cleaner G Carburetor Cleaner G Engine Degreaser G General Degreaser 

G Other: 

Product name: 

Manufacturer: 

Part # or UPC code: 

Product form: Aerosol G Liquid G Pump Spray G Other 

Listed on label as Flammable? Yes G No G

Chlorinated? Yes G No G

Notes: 

 

5. Product Type:

G Brake Cleaner G Carburetor Cleaner G Engine Degreaser G General Degreaser 

G Other: 

Product name: 

Manufacturer: 

Part # or UPC code: 

Product form: Aerosol G Liquid G Pump Spray G Other 

Listed on label as Flammable? Yes G No G

Chlorinated? Yes G No G

Notes: 

 

General comments/observations: 

 
Appendix C 

Methodology for Estimating the Potential Health Impacts 

from Automotive Maintenance and Repair Facilities
C-1

Appendix C. Methodology for Estimating the Potential Health Impacts from Automotive

Maintenance and Repair Facilities

This appendix steps through an example calculation to illustrate the procedures that ARB

staff used to estimate the potential health impacts from Perchloroethylene (Perc), Methylene

Chloride (MeCl), and Trichloroethylene (TCE) usage in aerosol brake cleaning products at

automotive maintenance and repair (AMR) facilities. In order to estimate the impacts, product

usage information, physical descriptions of the source, and emission release parameters were

collected during site visits. This information is used to estimate the facility’s Perc, MeCl, and

TCE emission rates and to model the facility’s emissions using the SCREEN3 and ISCST3 air

dispersion models. The modeling results are then used to determine the potential health impacts. 

The information in this appendix should not be used to compare in any way the SCREEN3 and

ISCST3 air dispersion models or their results. 

ARB staff used the Brake/Automotive Repair Shop survey form in Appendix B to collect

the necessary information to model each facility’s potential health impacts. The more pertinent

information collected includes the facility’s building dimensions, distance to the nearest

residential and business receptors, the operating schedule of the service area, and information

about the products and their use in brake cleaning. This example calculation uses data collected

from one of the site visits and focuses only on Perc emissions to illustrate the methodology. 

A. Chronic and Acute Calculations

The calculation begins with the determination of the facility’s Perc usage and Perc

emission rate, steps through the modeling inputs, and concludes with the calculation of potential

health impacts. For our example, we have selected a minimum receptor distance of 32 meters

from the center of the volume source (the building) to define a near-source location. For ease of

illustration, we assume that both the maximum exposed individual resident (MEIR) and the

maximum exposed individual (offsite) worker (MEIW) occur at this location.

1. Determining a Facility’s Perc Usage

In order to determine a facility’s Perc usage, the following information is needed: the

weight percent of Perc in the brake cleaning product, the approximate number of product units

used per week, and the weight of the product unit itself. Our example facility was using

19 ounce cans of aerosol product with a 94 percent Perc content by weight and they reported

using an average of 624 cans of product each year. The weight percent is obtained either directly

from the product label or from the material safety data sheet (MSDS) for the product. The Perc

usage in terms of grams per year is given by Equation 1. 
C-2

(1)

It should be noted that MeCl and TCE usage can be calculated by substituting in their

corresponding percent content by weight in place of Perc in Equation 1.

2. Determining the Perc Emission Rate

With the Perc usage calculated, we now estimate the acute and annualized emission rates

in terms of grams per second. These conversions are necessary because they are required input

parameters for the SCREEN3 and ISCST3 models. The acute emission rate is determined by

calculating the emissions from the number of brake jobs that are performed each hour by the

facility. Based on information collected from the site visits, the facilities visited did not perform

more than one brake service (job) in any given hour (usually limited by available manpower,

tools, and equipment). Our example facility reported that they performed approximately 624

brake services per year (12 services per week). Using this information, Equation 2 calculates the

acute emission rate.

(2)

The annualized Perc emission rate is determined by dividing the Perc usage calculated by

Equation 1 by the facility’s reported operating schedule. Our example facility reported that their

service area operated 3016 hours per year. Using this information, Equation 3 gives the

annualized emission rate uniformly distributed over the operating schedule.

(3)
C-3

3. Air Dispersion Modeling

a. Running the SCREEN3 Air Dispersion Model

Now that we know the facility’s acute and annualized Perc emission rates, physical

descriptions of the source, and emission release parameters, we can run the SCREEN3 air

dispersion model. Table C-1 summarizes the modeling input parameters for this example. For

the AMR facilities, we assumed that the single-story source release height is one-half of the

building height. The initial lateral dimension of volume is assumed to be the shortest side of the

building exterior divided by the factor 4.3 and the initial vertical dimension of volume is

assumed to be the exterior building height divided by the factor 2.15 (U.S. EPA, 1995a). These

particular dimension assumptions were selected to represent a modeling scenario that can be

generally applied to various sized (e.g., rectangular) AMR facilities. Our example facility is

located in an urban area. 

Table C-1. SCREEN3 Modeling Input Parameters for Example Facility

Perc Emission Rate (acute) [grams/s] 0.1407

Perc Emission Rate (annualized) [grams/s] 0.0291

Receptor Height [meters]10

Source Release Height [meters]22.3

Initial Lateral Dimension of Volume (σyo) [meters]3 2.5

Initial Vertical Dimension of Volume (σzo) [meters]4 2.1

Meteorology Option Full (Acute)/Class 4 (Annual)

Land Type (Urban or Rural) Urban

Receptor Distance (from center of source) 32

Operating Schedule [hrs/yr] 3016

1. Selected by convention as a ground-level receptor.

2. One-half of building height (15 feet, 4.6 meters)

3. Exterior building width (35 feet, 10.7 meters) divided by factor 4.3 per SCREEN3 User’s Guide

4. Exterior building height (15 feet, 2.1 meters) divided by factor 2.15 per SCREEN3 User’s Guide

The SCREEN3 model uses these inputs to estimate the downwind, ground-level,

maximum 1-hour concentrations for designated distances from the center of the volume source. 

The estimated acute maximum 1-hour concentration at 32 meters from the center of the facility is 

1463 μg/m3 and the estimated annualized (chronic) 1-hour concentration is 176 μg/m3. It should

be noted that the SCREEN3 model must be run twice; once using the acute emission rate and

once using the annualized emission rate. 
C-4

Since potential cancer risks and non-cancer chronic health impacts require an assessment

of the annual average concentration of Perc, the U.S. EPA conversion factor of 0.08

(U.S. EPA, 1992) is used to estimate the maximum annual average concentration from the

annualized maximum 1-hour concentration. In addition, the maximum annual average

concentration is discounted by the operating schedule for the hours the facility does not emit. 

The maximum annual average concentration is calculated by using Equation 4.

(4)

Substituting in the example data, Equation 5 gives the maximum annual average concentration 

of 4.848 μg/m3.

(5)

A summary of the output from the SCREEN3 modeling is shown in Appendix D

(Modeling Results). For more information on the SCREEN3 model, please refer to the

SCREEN3 model user’s guide (U.S. EPA, 1995).

b. Running the ISCST3 Air Dispersion Model Using Regional-Specific

Meteorology

Where regional-specific meteorology information is available, the ISCST3 air dispersion

model can be used to provide a more refined analysis of a facility’s emissions. Table C-2

summarizes the modeling input parameters for this example using the same example facility and

source characteristic assumptions made for SCREEN3.

With ISCST3, you have the option of using a meteorological data set that represents the

meteorology in the region the facility is located in. As a result, SCREEN3 and ISCST3 may not

necessarily yield the same results for a given facility. In order to estimate what the difference

would be, both models would need to be run and compared bearing in mind that each models

treats the volume source differently. It should be noted that the ISCST3 model must also be run

twice if discrete annual and acute emission rates are being used. While this approach is

convenient with the SCREEN3 model, the ISCST3 model is considerably more resource

intensive and time consuming to execute. Modeling scenarios under ISCST3 can be greatly

simplified if an emission rate of 1 gram per second is used (commonly referred to as an unit

emission rate).
C-5

Table C-2. ISCST3 Modeling Input Parameters for Example 

Facility Using Regional-Specific Meteorology

Perc Emission Rate (acute) [grams/s] 0.1407

Perc Emission Rate (annual) [grams/s] 0.0291

Modeled Unit Emission Rate [grams/s] 1.0

Receptor Height [meters]10

Source Release Height [meters]22.3

Initial Lateral Dimension of Volume (σyo) [meters]3 4.7

Initial Vertical Dimension of Volume (σzo) [meters]3 2.1

Averaging Period Hourly and Annual

Meteorology Representative Regional

Land Type (Urban or Rural) Urban

Receptor Locations Cartesian Grid Network4

Receptor Distance (from center of source) 32

Operating Schedule [hrs/yr] 3016

1. Selected by convention as a ground-level receptor.

2. One-half of building height (15 feet, 4.6 meters)

3. Calculated per ISCST3 User’s Guide

4. See Appendix D, Section X., Table 2.

With the unit emission rate, the estimated annual and acute unit concentrations are 113

μg/m3 and 5027 μg/m3, respectively. Equation 6 is then used to calculate the concentrations for

the discrete emission rate scenarios given in Equations 2 and 3. 

(6)

Substituting in the emission rates from Equation 2 and 3, Equations 7 and 8 give the

maximum annual concentration of 3.288 μg/m3 and the maximum 1-hour (acute) concentration

of 707 μg/m3.

(7)
C-6

(8)

Since ISCST3 directly calculates the maximum annual and acute concentrations using the

facility’s operating schedule when using regional-specific meteorology, neither the 0.08

conversion factor adjustment nor the operating schedule adjustment is required. 

c. Running the ISCST3 Air Dispersion Model Using Default Meteorology

If regional-specific meteorological data is not available, the ISCST3 model can be

run using default meteorological data. The model inputs are substantially similar to those

required for regional meteorological data and are summarized in Table C-3.

Table C-3. ISCST3 Modeling Input Parameters for 

Example Facility Using Default Meteorology

Perc Emission Rate (acute) [grams/s] 0.1407

Perc Emission Rate (annual) [grams/s] 0.0291

Receptor Height [meters]10

Source Release Height [meters]22.3

Initial Lateral Dimension of Volume (σyo) [meters]3 4.7

Initial Vertical Dimension of Volume (σzo) [meters]3 2.1

Meteorology Default

Land Type (Urban or Rural) Urban

Receptor Locations Cartesian Grid Network

Receptor Distance (from center of source) 32

Operating Schedule [hrs/yr] 3016

1. Selected by convention as a ground-level receptor.

2. One-half of building height (15 feet, 4.6 meters)

3. Calculated per ISCST3 User’s Guide

 

When using default meteorological data, ISCST3 calculates only a maximum 1-hr (acute)

concentration instead of both acute and annual concentrations. Under this scenario, again using a

unit emission rate, the estimated acute unit concentration is 7845 μg/m3 at 32 meters from the 
C-7

center of the facility. Equation 6 is again used to calculate the concentrations for the acute

emission rate given in Equation 2. Substituting in the acute emission rate from Equation 2,

Equation 9 gives the maximum 1-hour (acute) concentration of 1104 μg/m3.

(9)

The maximum annual concentration is calculated by using U.S. EPA conversion factor

0.08 (U.S. EPA, 1992) and adjusting the operating schedule for the hours the facility does not

emit, as described by Equation 4. However, the annualized maximum 1-hour concentration must

first be calculated as shown in Equation 10. Using Equation 4 with the result from Equation 10,

Equation 11 gives the maximum annual average concentration of 6.280 μg/m3.

(10)

(11)

A summary of the output from the ISCST3 modeling is shown in Appendix D (Modeling

Results). For more information on the ISCST3 model, please refer to the ISCST3 model user’s

guide (U.S. EPA, 1995b).

4. Calculation of Potential Cancer Risk and Non-Cancer Acute and Chronic Hazard

Indices

In this example, SCREEN3 and the two ISCST3 calculations predicted slightly different

maximum concentrations. While either of the three can be used to calculate the potential health

impacts, the example calculation will continue with the estimated concentrations from the

ISCST3 model using regional-specific meteorological data. We can combine the modeling

output with the unit risk factor (cancer effects) or the reference exposure level (non-cancer

effects) to determine the potential cancer risk and corresponding acute and chronic hazard

indices. The risk assessments are conducted using guidance from the California Air Pollution

Control Officers Association (CAPCOA), Revised 1992, Air Toxic "Hot Spots" Program Risk

Assessment Guidelines (CAPCOA, 1993). For this example, we calculated the potential cancer 
C-8

and non-cancer health impacts at a near-source location of 32 meters from the center of the

volume source (five meters away from the edge of the building). We also assumed that a MEIR

(resident) and a MEIW (worker) are exposed to the same concentration. The inhalation unit risk

factor (URF) for Perc is 5.9 x 10-6 (μg/m3)

-1; the acute non-cancer reference exposure level (REL)

is 20.0 x 103 μg/m3 and the chronic REL is 35 μg/m3 (CAPCOA, 1993). Equation 12 shows the

basic algorithm for determining the potential cancer risk, in chances per million, for a residential

location (MEIR). 

(12)

The factor 106/million is used to convert the result into the standard reporting unit,

chances per million. Substituting in the maximum annual average concentration from Equation 7

and the Perc URF, Equation 13 gives us the potential cancer risk for a residential receptor

32 meters away from the center of the building.

(13)

Equation 14 gives the formula for calculating the potential risk for an off-site worker

(MEIW). Using guidance from OEHHA, the exposure period of an off-site worker is adjusted to

allow for a shorter working lifetime and a shorter operating schedule. This first adjustment is

made to allow for a shorter working lifetime, 46 years, rather than a 70-year exposure lifetime

which is assumed for residential exposure. The second adjustment is appropriate only when the

offsite worker schedule does not coincide with or is shorter than that of the facility being

assessed (OEHHA, 1997). It is assumed that a nearby worker would be exposed 8 hours a day,

240 days a year (1920 hours/year) for 46 years (CAPCOA, 1993).

(14)

Substituting in the maximum annual average concentration from Equation 7, the URF,

and the operating schedule (3016 hours per year, for this example), Equation 15 gives the risk for

an offsite worker.

(15)
C-9

(17)

(19)

Equations 16 and 17 give the formulas for calculating the non-cancer acute and chronic

hazard indices, respectively. The acute hazard index is determined by taking the acute maximum

1-hour concentration (acute exposure) and dividing by the acute REL of 20,000 μg/m3. 

(16)

Similarly, the chronic hazard index is determined by taking the maximum annual average

concentration (chronic exposure) and dividing by the chronic REL of 35 μg/m3. Finally,

Equations 18 and 19 solve for the acute and chronic hazard indices, respectively.

(18)

Tables C-3 summarizes the results that have been calculated in this example for ISCST3

using regional-specific meteorology. 

Table C-3. Summary of ISCST3 Results from Example Calculation

Parameter Result Reference

Perc Emission Rate (acute), [grams/s] 0.1407 Equation 2

Perc Emission Rate (annualized) [grams/s] 0.0291 Equation 3

Maximum Concentration (unit annual), [μg/m3] 113 ISCST3 Model Output

Maximum Concentration (unit acute), [μg/m3] 5027 ISCST3 Model Output

Maximum Concentration (annual) , [μg/m3] 3.288 Equation 7

Maximum Concentration (acute), [μg/m3] 707 Equation 8

Cancer Risk (Resident) [chances per million] 19.4 Equation 13

Cancer Risk (Worker) [chances per million] 8.1 Equation 15

Non-Cancer Acute Hazard Index 0.035 Equation 18

Non-Cancer Chronic Hazard Index 0.094 Equation 19
C-10

As previously mentioned, this methodology can be extended to MeCl and TCE (or any

other pollutant of interest) by using Equation 1 to calculate MeCl and TCE emission rates. 

Additionally, the URF and acute and chronic RELs for these toxic pollutants will also be needed. 

Table C-4 summarizes the necessary health values. A summary of results from the modeling

performed on each of the facilities visited, as well as the generic facilities, is presented in

Appendix D.

Table C-4. Pollutant-Specific Health Values

Pollutant Unit Risk Factor

(URF)

Acute Reference

Exposure Level 

Chronic Reference

Exposure Level

Perchloroethylene (Perc) 5.9 x 10-6 (μg/m3

)

-1 20,000 μg/m3

35 μg/m3

Methylene Chloride (MeCl) 1.0 x 10-6 (μg/m3

)

-1 14,000 μg/m3

3000 μg/m3

Trichloroethylene (TCE) 2.0 x 10-6 (μg/m3

)

-1 none 640 μg/m3

B. Calculation of the Regional Cancer Risk from Specific Facilities

To perform an assessment of the potential regional cancer risk at the thirteen specific

facilities an assessor would start by running a refined air dispersion model. For this analysis,

concentration estimates were produced using ISCST3 and multiple years of meteorological data. 

An example of the input for the ISCST3 model is provided in Table C-2. 

The output from the ISCST3 model consists of concentrations at specified locations

around a facility that can be referred to as a grid of receptor points. Based on the spatial

resolution of the available population data and existing software tools, a 31-kilometer by 31-

kilometer system of one-kilometer, square grid-cells was established for each facility as a spatial

basis of analysis. Each grid system is centered on the represented facility.

After the modeling is complete, further post processing is performed to produce one

concentration estimate per grid-cell. Two receptor networks were used for estimating

concentrations with ISCST3 (at each receptor a concentration, exclusive to each facility's

emissions, is estimated). One network consists of receptors spaced one-kilometer apart,

coincident with the center of each of the one-kilometer, square grid-cells in the 31-kilometer by

31-kilometer grid system. These sparsely spaced receptors are used to represent the

homogeneous, low grid-cell concentrations experienced outside of the 9 most central grid-cells

where concentrations tend to be less uniform. However, because a large concentration gradient is

experienced close to the source (i.e., inhomogeneous emissions), a network consisting of many

receptors per grid-cell (100 meters apart) was used. Concentrations estimated at these receptors

were averaged, per grid-cell, to produce average concentrations for the nine most central cells. 
C-11

Census tract population data were acquired from the State Department of Finance. 

Spatially, this data represents California census tract population estimates for 1998, grown from

1990 Census data. A census tract, generally, represents an area larger than one square kilometer. 

Data processing of population data took into consideration that grid-cell boundaries overlap with

census tract boundaries. Where multiple grid-cells split a census block population estimate, the

population data for the single census tract is allocated based on the relative area of the census

tract falling in each grid-cell. This is consistent with past population exposure analyses and

assumes a homogeneous distribution of population within the tract. 

Population data and modeled concentration results were processed to represent the

average population and average concentration within each of the one-kilometer square grid-cells

in the 31-kilometer by 31-kilometer grid system. The averaged population and concentration

data for each grid-cell were overlaid. The concentration and population estimates were then

merged based on the represented grid-cell and frequency distributions of the regional population

exposure to each of the annual modeling results were created, based on a uniform range of

receptor concentrations. See Appendix D, Section E for a complete listing of all thirteen

facilities population exposure estimates and Table C-5 for an example.

In Table C-5, the left column presents the modeled annual concentration estimate based

on a unit emission rate of one gram per second and the next 6 columns present the estimated

population exposed to that concentration per meteorology year. In this example, the five

columns right of the concentration are for Oakland 1960 to 1964. The last column is the average

population surrounding this facility in Oakland over the years 1960 to 1964.

For example, the results from Table C-5 indicate that within one-kilometer of this facility,

on average, 5,843 persons are estimated to be exposed to concentrations of 0.163 μg/m3 up to

6.28 μg/m3 (based on a one gram per second emissions rate) using Oakland meteorological data

for years 1960 through 1964.

To make this table more meaningful, the unit emission rates can be converted to potential

cancer risk estimates. To perform this calculation the additional information that is needed is

actual emission rate for the facility being evaluated and the pollutant-specific unit risk factor

(URF). From Table C-3, the annual emission rate for this facility is 0.0291 grams per second. 

See Appendix D for a listing of the emission rates used for each modeled facility. The URF for

Perc is 5.9 x 10-6 (microgram per cubic meter)-1 or (μg/m3)

-1. Equation 20 shows the algorithm

for converting a unit emission rate into an estimate of the potential cancer risk reported in

chances per million.

 

(20)
C-12

Table C-5. Example Table of Population Exposure Estimates

μg/m3

>=

OAK60 OAK61 OAK62 OAK63 OAK64 AVG

0.000 1,300,824 1,300,824 1,300,824 1,300,824 1,300,824 1,300,824

0.001 593,781 610,692 638,801 610,352 618,981 614,521

0.003 377,141 385,071 401,672 391,357 423,603 395,769

0.004 268,996 281,562 283,035 268,881 312,438 282,982

0.006 192,742 203,315 220,437 216,063 234,450 213,401

0.007 176,510 174,360 181,645 165,209 194,184 178,382

0.009 132,661 143,847 149,503 143,106 142,784 142,380

0.010 112,796 115,642 119,774 119,184 131,794 119,838

0.011 103,975 106,927 105,949 105,949 119,588 108,478

0.013 95,571 90,808 99,529 100,217 95,886 96,402

0.014 87,623 86,550 91,753 78,587 87,623 86,427

0.016 80,258 69,719 87,623 70,114 79,699 77,483

0.017 59,443 61,804 61,804 66,517 67,676 63,449

0.020 56,185 58,546 54,494 63,259 55,002 57,497

0.024 52,133 52,133 52,133 56,185 44,033 51,323

0.031 38,289 42,785 38,289 42,785 38,289 40,087

0.041 29,615 33,907 33,907 33,907 29,615 32,190

0.047 25,101 25,101 25,101 25,101 25,101 25,101

0.054 12,008 12,008 20,702 16,407 20,702 16,365

0.163 4,302 4,302 12,008 4,302 4,302 5,843

The factor 106/million in Equation 20 is used to convert the result into the standard

reporting unit, chances per million. Substituting in the facility’s actual emission rate from 

Table C-3, the maximum annual average concentration from the left hand column of Table C-5,

and the Perc URF, Equation 21 gives us the potential cancer risk for the population estimates

listed in the right six columns. 
C-13

(21)

Returning to the earlier example from Table C-5, where the results indicate that within

one-kilometer of this facility, on average, 5,843 persons are estimated to be exposed to

concentrations of 0.163 μg/m3 to 6.28 μg/m3, we now see that this unit-emissions-based

concentration translates to an estimated cancer risk of 0.03 chances per million to 19 chances per

million. See Table VI-6 in Chapter VI for a list of the estimated regional cancer risks for the

one-kilometer grid-cell concentrations at all thirteen specific facilities. 

Although the potential cancer risk from the one-kilometer grid-cell concentration is not

very large, this does not mean that higher potential cancer risks are not present within the 

one-kilometer grid-cell. High concentration gradients have been shown to exist within 100

meters of a facility. Examples of higher potential cancer risks within the one-kilometer grid-cell

at the thirteen specific facilities have been estimated at the near source, MEIR, and MEIW

locations and are presented in Table VI-6 in Chapter VI.
C-14

REFERENCES FOR APPENDIX C

CAPCOA, 1993. CAPCOA Air Toxics “Hot Spots” Program - Revised 1992 Risk

Assessment Guidelines, Toxics Committee of the California Air Pollution Control Officer

Association (CAPCOA), October 1993.

OEHHA, 1997. Telephone conversation with Melanie Marty, Manager, Air Risk 

Assessment Unit, Office of Environmental Health Hazard Assessment, and Greg Harris, on 

May 19, 1997.

U.S. EPA, 1992. Screening Procedures for Estimating the Air Quality Impact of Stationary 

Sources, Revised, United States Environmental Protection Agency (U.S. EPA), 

October 1992.

U.S. EPA, 1995a. ISCST3 Model User’s Guide, EPA-454/B-95-003a, United States

Environmental Protection Agency (U.S. EPA), Research Triangle Park, North Carolina,

September 1995.

U.S. EPA, 1995b. SCREEN3 Model User’s Guide, EPA-454/B-95-004, United States

Environmental Protection Agency (U.S. EPA), Research Triangle Park, North Carolina,

September 1995.
Appendix D

Specific and Generic Facility Modeling Results
D-1

Appendix D. Specific and Generic Facility Modeling Results

This appendix presents the modeling input parameters and results summary for the 54

specific facilities and three generic facilities that were modeled. The modeling utilized both the

SCREEN3 and ISCST3 air dispersion models. The ISCST3 model was used for 13 specific

facilities and the generic facilities. All other facilities were modeled using SCREEN3.

A. Perchloroethylene-Using Facilities Modeled with SCREEN3

This section summarizes the results from our modeling of the 29 facilities that used

perchloroethylene (Perc) brake cleaning products which did not contain either methylene chloride

(MeCl) or trichloroethylene (TCE). Tables D-1 thru D-5 present the modeling input parameters

for each facility modeled using SCREEN3 . Tables D-6 thru D-11 summarize the modeling

results.

Table D-1. Modeling Input Parameters for Facilities E, H, L, N, Q, R, and V

Parameter Value1

Facility E Facility H Facility L Facility N Facility Q Facility R Facility V

Source Type Volume Volume Volume Volume Volume Volume Volume

Facility Type Service

Station

Fleet Service

Station

 Dealership General

Auto

General

Auto

Brake

Shop

Perc Content [%] 65 to 94 65 to 94 65 to 94 99 65 to 94 65 to 94 90

Perc Emission Rate - Annual

[grams/s]

0.0007 to 

0.0010

0.0010 to

0.0014

0.0025 to

0.0036

0.00231 0.0260 to

0.0375

0.0227 to

0.0328

0.0002

Perc Emission Rate - Acute

[grams/s]

0.0490 to

0.0704

0.0075 to

0.0108

0.1350 to

0.1944

0.0076 0.2925 to

0.4219

0.5562 to

0.0804

0.0052

Receptor Height [m] 0 0 0 0 0 0 0

Source Release Height [m] 2.896 4.572 2.286 2.286 3.048 2.438 2.286

Initial Lateral Dimension of

Volume [m]

1.949 12.995 3.573 3.190 4.749 4.253 2.127

Initial Vertical Dimension

of Volume [m]

2.694 4.253 2.127 2.127 2.835 2.268 2.127

Met Option - Acute/Annual Full Full Full Full Full Full Full

Land Type (Urban or Rural) Urban Urban Urban Urban Urban Urban Urban

Operating Schedule

[hrs/wk]

69 47.5 54 42.5 45 51.5 45

1. These facilities use a brake cleaning product which shows a Perc content range on the MSDS; therefore a range is presented for the Perc emission rate.
D-2

Table D-2. Modeling Input Parameters for Facilities A-13, A-14, A-15, A-16, A-21, and A-29

Parameter Value1

Facility 

A-13

Facility 

A-14

Facility 

A-15

Facility 

A-16

Facility 

A-21

Facility 

A-29

Source Type Volume Volume Volume Volume Volume Volume

Facility Type General

Automotive

General

Automotive

General

Automotive

General

Automotive

Brake Shop Fleet

Perc Content [%] 65 to 94 65 to 94 70 to 94 65 to 94 70 to 94 65 to 94

Perc Emission Rate - Annual

[grams/s]

0.00006 to

0.00009

0.0005 to

0.0007

0.0023 to

0.0033

0.0030 to

0.0044

0.0037 to

0.0050

0.0130 to

0.0188

Perc Emission Rate - Acute

[grams/s]

0.0006 to

0.0009

0.0225 to

0.0325

0.0524 to

0.0704

0.0162 to

0.0234

0.0524 to

0.0703

0.0898 to

0.1299

Receptor Height [m] 0 0 0 0 0 0

Source Release Height [m] 2.743 2.438 2.286 2.743 2.438 3.810

Initial Lateral Dimension of

Volume [m]

3.332 2.481 5.316 3.899 5.671 4.253

Initial Vertical Dimension of

Volume [m]

2.552 2.268 2.127 2.552 2.268 3.544

Met Option - Annual Class 4 Class 4 Class 4 Class 4 Class 4 Class 4

Met Option - Acute Full Full Full Full Full Full

Land Type (Urban or Rural) Urban Urban Urban Urban Urban Urban

Operating Schedule [hrs/wk] 60.5 47.5 45 64 56.5 90

1. These facilities use a brake cleaning product which shows a Perc content range on the MSDS; therefore a range is presented for the Perc emission rate.
D-3

Table D-3. Modeling Input Parameters for Facilities A-30, A-31, A-32, A-35, A-36, and A-50

Parameter Value1

Facility 

A-30

Facility 

A-31

Facility 

A-32

Facility 

A-35

Facility 

A-36

Facility 

A-50

Source Type Volume Volume Volume Volume Volume Volume

Facility Type Fleet General

Automotive

General

Automotive

Brake Shop Dealership General

Automotive

Perc Content [%] 25 to 85 65 to 94 65 to 94 65 to 94 65 to 94 65 to 94

Perc Emission Rate - Annual

[grams/s]

0.0023 to

0.0078

0.0088 to

0.0127

0.0006 to

0.0009

0.0055 to

0.0079

0.0273 to

0.0394

0.0040 to

0.0057

Perc Emission Rate - Acute

[grams/s]

0.0531 to

0.1806

0.0122 to

0.0176

0.0244 to

0.0353

0.2547 to

0.3681

0.0717 to

0.1037

0.0649 to

0.0938

Receptor Height [m] 0 0 0 0 0 0

Source Release Height [m] 4.572 2.743 2.591 3.810 3.810 2.438

Initial Lateral Dimension of

Volume [m]

5.671 3.190 2.835 4.607 4.253 2.127

Initial Vertical Dimension of

Volume [m]

4.253 2.552 2.410 3.544 3.544 2.268

Met Option - Annual Class 4 Class 4 Class 4 Class 4 Class 4 Class 4

Met Option - Acute Full Full Full Full Full Full

Land Type (Urban or Rural) Urban Urban Urban Urban Urban Urban

Operating Schedule [hrs/wk] 92.5 55.5 40 46.5 50 49

1. These facilities use a brake cleaning product which shows a Perc content range on the MSDS; therefore a range is presented for the Perc emission rate.
D-4

Table D-4. Modeling Input Parameters for Facilities A-51, A-54, A-73, A-84, and A-87

Parameter Value1

Facility A-51 Facility A-54 Facility A-73 Facility A-84 Facility A-87

Source Type Volume Volume Volume Volume Volume

Facility Type General

Automotive

General

Automotive

General

Automotive

General

Automotive

Dealership

Perc Content [%] 90 to 99 65 to 94 65 to 75 89 60 to 99

Perc Emission Rate - Annual

[grams/s]

0.0025 to 0.0027 0.0057 to 0.0083 0.0130 to 0.0150 0.0142 0.0187 to 0.0308

Perc Emission Rate - Acute

[grams/s]

0.1417 to 0.1558 0.0730 to 0.1056 0.0487 to 0.0562 0.1441 0.0280 to 0.0462

Receptor Height [m] 0 0 0 0 0

Source Release Height [m] 2.438 2.591 3.048 3.353 3.048

Initial Lateral Dimension of

Volume [m]

1.559 1.772 2.481 2.481 7.088

Initial Vertical Dimension of

Volume [m]

2.268 2.410 2.835 3.119 2.835

Met Option - Annual Class 4 Class 4 Class 4 Class 4 Class 4

Met Option - Acute Full Full Full Full Full

Land Type (Urban or Rural) Urban Urban Urban Urban Urban

Operating Schedule [hrs/wk] 57 51 45 71 45

1. These facilities use a brake cleaning product which shows a Perc content range on the MSDS; therefore a range is presented for the Perc emission rate.
D-5

Table D-5. Modeling Input Parameters for Facilities A-88, A-89, A-90, A-93, and A-94

Parameter Value1

Facility A-88 Facility A-89 Facility A-90 Facility A-93 Facility A-94

Source Type Volume Volume Volume Volume Volume

Facility Type General

Automotive

General

Automotive

Service Station General

Automotive

Service Station

Perc Content [%] 20 to 50 65 to 94 65 to 94 65 to 94 65 to 94

Perc Emission Rate - Annual

[grams/s]

0.0090 to 0.0224 0.0039 to 0.0056 0.0041 to 0.0059 0.0088 to 0.0128 0.0015 to 0.0022

Perc Emission Rate - Acute

[grams/s]

0.1495 to 0.3739 0.0097 to 0.0141 0.1947 to 0.2814 0.0973 to 0.1407 0.0340 to 0.0493

Receptor Height [m] 0 0 0 0 0

Source Release Height [m] 3.200 2.438 2.591 2.438 2.743

Initial Lateral Dimension of

Volume [m]

3.544 3.544 1.772 4.253 1.772

Initial Vertical Dimension of

Volume [m]

2.977 2.268 2.410 2.268 2.552

Met Option - Annual Class 4 Class 4 Class 4 Class 4 Class 4

Met Option - Acute Full Full Full Full Full

Land Type (Urban or Rural) Urban Urban Urban Urban Urban

Operating Schedule [hrs/wk] 50 50 48 55 45

1. These facilities use a brake cleaning product which shows a Perc content range on the MSDS; therefore a range is presented for the Perc emission rate.
D-6

Table D-6. Summary of Modeling Results for Facilities E, H, L, N, and Q

FACILITY RECEPTOR

TYPE

Receptor Distance

[meters]

Maximum

1-hour Conc.

(acute)

[μg/m3]

Maximum

1-hour Conc.

(annualized)

[μg/m3]

Maximum

Annual Avg.

Conc.

[μg/m3]

 Potential Cancer Risk 

[chances per million]

Hazard Index

Center1 Env.2 Resident Worker Acute Chronic

E

3 Near-Source 20 16 710.0 to 1026 10.29 to 14.87 0.3372 to 0.4872 1.99 to 2.87 0.70 to 1.01 0.0355 to 0.0513 0.0096 to 0.0139

MEIW 40 36 384.9 to 556.2 5.578 to 8.061 0.1828 to 0.2641 1.08 to 1.56 0.38 to 0.55 0.0192 to 0.0278 0.0052 to 0.0075

MEIR 805 801 4.44 to 6.41 0.0642 to 0.0929 0.0021 to 0.0030 0.01 to 0.02 0.00 to 0.01 0.0002 to 0.0003 0.0001 to 0.0001

H3 Near-Source 30 2 17.89 to 25.81 2.265 to 3.267 0.0511 to 0.0737 0.30 to 0.43 0.15 to 0.22 0.0009 to 0.0013 0.0015 to 0.0021

MEIW 330 302 2.10 to 3.02 0.2652 to 0.3825 0.0060 to 0.0086 0.04 to 0.05 0.02 to 0.03 0.0001 to 0.0002 0.0002 to 0.0002

MEIR 830 802 0.58 to 0.83 0.0728 to 0.105 0.0016 to 0.0024 < 0.01 to 0.01 < 0.01 to 0.01 <0.0001 0.0000 to 0.0001

L

3 Near-Source 20 12 1689 to 2439 31.27 to 45.16 0.8019 to 1.1581 4.73 to 6.83 2.13 to 3.07 0.0844 to 0.1219 0.0229 to 0.0331

MEIW 35 27 1096 to 1583 20.3 to 29.31 0.5206 to 0.7516 3.07 to 4.43 1.38 to 1.99 0.0548 to 0.0791 0.0149 to 0.0215

MEIR 240 232 82.89 to 119.7 1.535 to 2.216 0.0394 to 0.0568 0.23 to 0.34 0.10 to 0.15 0.0041 to 0.0060 0.0011 to 0.0016

N Near-Source 20 13 101.8 30.95 0.6247 3.69 2.10 0.0051 0.0178

MEIW 117 110 14.46 4.394 0.0887 0.52 0.30 0.0007 0.0025

MEIR 407 400 2.01 0.6123 0.0124 0.07 0.04 0.0001 0.0004

Q3 Near-Source 20 10 2427 to 3509 215.7 to 311.9 4.6095 to 6.6653 27.20 to 39.33 14.66 to 21.20 0.1213 to 0.1754 0.1317 to 0.1904

MEIW 71 61 879.3 to 1271 78.16 to 113 1.6703 to 2.4148 9.85 to 14.25 5.31 to 7.68 0.0440 to 0.0636 0.0477 to 0.0690

MEIR 86 76 701.7 to 1015 62.37 to 90.21 1.3328 to 1.9278 7.86 to 11.37 4.24 to 6.13 0.0351 to 0.0507 0.0381 to 0.0551

1. Distance to receptor measured from the center of the volume source.

2. Distance to receptor measured from the building exterior (envelope).

3. These facilities use a Perc-containing brake cleaner which shows a Perc content range on the Material Safety Data Sheet; therefore, a range is presented for the results.
D-7

Table D-7. Summary of Modeling Results for Facilities R, V, A-13, A-14, and A-15

FACILITY RECEPTOR

TYPE

Receptor Distance

[meters]

Maximum

1-hour Conc.

(acute)

[μg/m3]

Maximum

1-hour Conc.

(annualized)

[μg/m3]

Maximum

Annual Avg.

Conc.

[μg/m3]

 Potential Cancer Risk 

[chances per million]

Hazard Index

Center1 Env.2 Resident Worker Acute Chronic

R

3 Near-Source 20 11 592.9 to 857.0 242 to 349.8 5.9185 to 8.5549 34.92 to 50.47 16.45 to 23.78 0.0296 to 0.0429 0.1691 to 0.2444

MEIW 39 30 361.9 to 523.3 147.7 to 213.6 3.6122 to 5.2239 21.31 to 30.82 10.04 to 14.52 0.0181 to 0.0262 0.1032 to 0.1493

MEIR 55 46 255.8 to 369.7 104.4 to 150.9 2.5533 to 3.6905 15.06 to 21.77 7.10 to 10.26 0.0128 to 0.0185 0.0730 to 0.1054

V

3 Near-Source 20 15 86.41 3.837 0.0820 0.48 0.26 0.0043 0.0023

MEIW 23 18 77.38 3.436 0.0734 0.43 0.23 0.0039 0.0021

MEIR411 6 >86.41 >3.837 >0.0820 >0.48 >0.26 >0.0043 >0.0023

A-133 Near-Source 20 13 6.81 to 10.22 0.4835 to 0.7253 0.0139 to 0.0208 0.08 to 0.12 0.03 to 0.05 0.0003 to 0.0005 0.0004 to 0.0006

MEIW 25 18 5.90 to 8.85 0.3928 to 0.5893 0.0113 to 0.0169 0.07 to 0.10 0.03 to 0.04 0.0003 to 0.0004 0.0003 to 0.0005

MEIR 83 73 1.74 to 2.61 0.0823 to 0.1235 0.0024 to 0.0035 0.01 to 0.02 0.01 to 0.01 0.0001 to 0.0001 0.0001 to 0.0001

A-143 Near-Source 20 15 331 to 478 4.67 to 6.76 0.105 to 0.152 0.62 to 0.90 0.32 to 0.46 0.017 to 0.024 0.003 to 0.004

MEIW411 6 >331 to >478 >4.67 to >6.76 >0.105 to >0.152 >0.62 to >0.90 >0.32 to >0.46 >0.017 to >0.024 >0.003 to >0.004

MEIR 112 107 47.10 to 68.03 0.4225 to 0.6113 0.0095 to 0.0138 0.06 to 0.08 0.03 to 0.04 0.0024 to 0.0034 0.0003 to 0.0004

A-153 Near-Source 20 9 503.7 to 676.7 16.03 to 21.53 0.3426 to 0.4601 2.02 to 2.71 1.09 to 1.46 0.0252 to 0.0338 0.0098 to 0.0131

MEIW 41 30 300.5 to 403.7 7.754 to 10.42 0.1657 to 0.2227 0.98 to 1.31 0.53 to 0.71 0.0150 to 0.0202 0.0047 to 0.0064

MEIR 87 76 131 to 176 2.758 to 3.706 0.0589 to 0.0792 0.35 to 0.47 0.19 to 0.25 0.0066 to 0.0088 0.0017 to 0.0023

1. Distance to receptor measured from the center of the volume source.

2. Distance to receptor measured from the building exterior (envelope).

3. These facilities use a Perc-containing brake cleaner which shows a Perc content range on the Material Safety Data Sheet; therefore, a range is presented for the results.

4. The receptor is located closer than 20 meters to the center of the volume source, which is the minimum distance modeled; therefore, the potential health impacts are likely to be greater than those listed here. 

 However, we do not anticipate that the potential health impacts will be significant. The impacts shown here are at the near-source location of 20 meters. 
D-8

Table D-8. Summary of Modeling Results for Facilities A-16, A-21, A-29, A-30, and A-31

FACILITY RECEPTOR

TYPE

Receptor Distance

[meters]

Maximum

1-hour Conc.

(acute)

[μg/m3]

Maximum

1-hour Conc.

(annualized)

[μg/m3]

Maximum

Annual Avg.

Conc.

[μg/m3]

 Potential Cancer Risk 

[chances per million]

Hazard Index

Center1 Env.2 Resident Worker Acute Chronic

A-163 Near-Source 20 12 166.9 to 241.1 22.54 to 32.63 0.6851 to 0.9917 4.04 to 5.85 1.53 to 2.22 0.0083 to 0.0121 0.0196 to 0.0283

MEIW 38 30 105.4 to 152.2 11.79 to 17.07 0.3583 to 0.5188 2.11 to 3.06 0.80 to 1.16 0.0053 to 0.0076 0.0102 to 0.0148

MEIR 313 305 6.35 to 9.17 0.4308 to 0.6235 0.0131 to 0.0189 0.08 to 0.11 0.03 to 0.04 0.0003 to 0.0005 0.0004 to 0.0005

A-213 Near-Source 20 8 458.4 to 615 23.63 to 31.72 0.6340 to 0.8511 3.74 to 5.02 1.61 to 2.16 0.0229 to 0.0308 0.0181 to 0.0243

MEIW 24 12 414.9 to 556.9 20.32 to 27.28 0.5452 to 0.7320 3.22 to 4.32 1.38 to 1.85 0.0207 to 0.0278 0.0156 to 0.0209

MEIR 126 114 77.06 to 103.4 2.396 to 3.217 0.0643 to 0.0863 0.38 to 0.51 0.16 to 0.22 0.0039 to 0.0052 0.0018 to 0.0025

A-293 Near-Source 20 11 665.8 to 963.1 96.39 to 139.4 4.1197 to 5.9579 24.31 to 35.15 6.55 to 9.48 0.0333 to 0.0482 0.1177 to 0.1702

MEIW 331 322 30.85 to 44.62 4.465 to 6.458 0.1908 to 0.2760 1.13 to 1.63 0.30 to 0.44 0.0015 to 0.0022 0.0055 to 0.0079

MEIR 161 152 90.25 to 130.5 13.06 to 18.89 0.5582 to 0.8074 3.29 to 4.76 0.89 to 1.28 0.0045 to 0.0065 0.0159 to 0.0231

A-303 Near-Source 20 8 274.8 to 934.5 11.9 to 40.41 0.5227 to 1.7751 3.08 to 10.47 0.81 to 2.75 0.0137 to 0.0467 0.0149 to 0.0507

MEIW 495 483 9.42 to 32.05 0.4081 to 1.386 0.0179 to 0.0609 0.11 to 0.36 0.03 to 0.09 0.0005 to 0.0016 0.0005 to 0.0017

MEIR 495 483 9.42 to 32.05 0.4081 to 1.386 0.0179 to 0.0609 0.11 to 0.36 0.03 to 0.09 0.0005 to 0.0016 0.0005 to 0.0017

A-313 Near-Source 20 13 142 to 205 72.24 to 105 1.904 to 2.757 11.23 to 16.3 4.9 to 7.1 0.0071 to 0.0103 0.0544 to 0.0788

MEIW413 6 >142 to >205 >72.24 to >105 >1.904 to >2.757 >11.2 to >16.3 >4.9 to >7.1 >0.0071 to >0.0103 >0.0544 to >0.0788

MEIR 226 229 7.63 to 11.01 2.079 to 3.01 0.0548 to 0.0793 0.32 to 0.47 0.14 to 0.02 0.0004 to 0.0006 0.0016 to 0.0023

1. Distance to receptor measured from the center of the volume source.

2. Distance to receptor measured from the building exterior (envelope).

3. These facilities use a Perc-containing brake cleaner which shows a Perc content range on the Material Safety Data Sheet; therefore, a range is presented for the results.

4. The receptor is located closer than 20 meters to the center of the volume source, which is the minimum distance modeled; therefore, the potential health impacts are likely to be greater than those listed here. 

 However, we do not anticipate that the potential health impacts will be significant. The impacts shown here are at the near-source location of 20 meters. 
D-9

Table D-9. Summary of Modeling Results for Facilities A-32, A-35, A-36, A-50, and A-51

FACILITY RECEPTOR

TYPE

Receptor Distance

[meters]

Maximum

1-hour Conc.

(acute)

[μg/m3]

Maximum

1-hour Conc.

(annualized)

[μg/m3]

Maximum

Annual Avg.

Conc.

[μg/m3]

 Potential Cancer Risk 

[chances per million]

Hazard Index

Center1 Env.2 Resident Worker Acute Chronic

A-323 Near-Source 20 14 318.3 to 460.5 5.507 to 7.945 0.1046 to 0.1509 0.62 to 0.89 0.37 to 0.54 0.0159 to 0.0230 0.0030 to 0.0043

MEIW 23 17 289.4 to 418.7 4.812 to 6.941 0.0914 to 0.1318 0.54 to 0.78 0.33 to 0.47 0.0145 to 0.0209 0.0026 to 0.0038

MEIR 143 137 34.12 to 49.36 0.3528 to 0.509 0.0067 to 0.0097 0.04 to 0.06 0.02 to 0.03 0.0017 to 0.0025 0.0002 to 0.0003

A-353 Near-Source 20 10 1790 to 2588 29.68 to 42.9 0.6554 to 0.9473 3.87 to 5.59 2.02 to 2.92 0.0895 to 0.1294 0.0187 to 0.0271

MEIW 25 15 1606 to 2321 25.14 to 36.34 0.5551 to 0.8025 3.28 to 4.73 1.71 to 2.47 0.0803 to 0.1161 0.0159 to 0.0229

MEIR 162 152 249.8 to 361.1 2.294 to 3.316 0.0507 to 0.0732 0.30 to 0.43 0.16 to 0.23 0.0125 to 0.0181 0.0014 to 0.0021

A-363 Near-Source 20 11 531.6 to 768.9 154.9 to 223.5 3.678 to 5.307 21.7 to 31.31 10.53 to 15.19 0.0266 to 0.0384 0.1051 to 0.1516

MEIW 85 76 165.6 to 239.5 31.6 to 45.7 0.7517 to 1.085 4.44 to 6.4 2.15 to 3.11 0.0083 to 0.0120 0.0215 to 0.0310

MEIR 161 152 72.06 to 104.2 11.68 to 16.86 0.2773 to 0.4003 1.64 to 2.36 0.79 to 1.15 0.0036 to 0.0052 0.0079 to 0.0114

A-503 Near-Source 20 15 1032 to 1491 42.07 to 60.82 0.9789 to 1.415 5.78 to 8.35 2.86 to 4.13 0.0516 to 0.0746 0.0280 to 0.0404

MEIW 20 15 1032 to 1491 42.07 to 60.82 0.9789 to 1.415 5.78 to 8.35 2.86 to 4.13 0.0516 to 0.0746 0.0280 to 0.0404

MEIR 20 15 1032 to 1491 42.07 to 60.82 0.9789 to 1.415 5.78 to 8.35 2.86 to 4.13 0.0516 to 0.0746 0.0280 to 0.0404

A-513 Near-Source 20 17 2593 to 2851 29.5 to 32.4 0.799 to 0.876 4.71 to 5.17 2.01 to 2.2 0.1297 to 0.143 0.0228 to 0.0250

MEIW49 6 >2593 to >2851 >29.5 to >32.4 >0.799 to >0.876 >4.71 to >5.17 >2.01 to >2.2 >0.1297 to >0.143 >0.0228 to >0.0250

MEIR 26 23 2059 to 2264 21.78 to 23.88 0.5896 to 0.6464 3.48 to 3.81 1.48 to 1.62 0.1030 to 0.1132 0.0168 to 0.0185

1. Distance to receptor measured from the center of the volume source.

2. Distance to receptor measured from the building exterior (envelope).

3. These facilities use a Perc-containing brake cleaner which shows a Perc content range on the Material Safety Data Sheet; therefore, a range is presented for the results.

4. The receptor is located closer than 20 meters to the center of the volume source, which is the minimum distance modeled; therefore, the potential health impacts are likely to be greater than those listed here. 

 However, we do not anticipate that the potential health impacts will be significant. The impacts shown here are at the near-source location of 20 meters.
D-10

Table D-10. Summary of Modeling Results for Facilities A-54, A-73, A-84, A-87, and A-88

FACILITY RECEPTOR

TYPE

Receptor Distance

[meters]

Maximum

1-hour Conc.

(acute)

[μg/m3]

Maximum

1-hour Conc.

(annualized)

[μg/m3]

Maximum

Annual Avg.

Conc.

[μg/m3]

 Potential Cancer Risk 

[chances per million]

Hazard Index

Center1 Env.2 Resident Worker Acute Chronic

A-543 Near-Source 20 17 1207 to 1746 62.7 to 90.7 1.517 to 2.195 8.9 to 12.96 4.3 to 6.2 0.0604 to 0.087 0.0434 to 0.0628

MEIW418 15 >1207 to >1746 >62.7 to >90.7 >1.517 to >2.195 >8.9 to >12.96 >4.3 to >6.2 >0.0604 to >0.087 >0.0434 to >0.0628

MEIR 41 38 611.8 to 885 25.93 to 37.53 0.6280 to 0.9089 3.71 to 5.36 1.76 to 2.55 0.0306 to 0.0443 0.0179 to 0.0260

A-733 Near-Source 20 15 600.5 to 692.9 112.7 to 130 2.408 to 2.778 14.21 to 16.39 7.66 to 8.84 0.0300 to 0.0346 0.0688 to 0.0794

MEIW 20 15 600.5 to 692.9 112.7 to 130 2.408 to 2.778 14.21 to 16.39 7.66 to 8.84 0.0300 to 0.0346 0.0688 to 0.0794

MEIR 327 322 18.24 to 21.05 1.736 to 2.003 0.0371 to 0.0428 0.22 to 0.25 0.12 to 0.14 0.0009 to 0.0011 0.0011 to 0.0012

A-843 Near-Source 20 15 1642 115.5 3.894 22.98 7.85 0.0821 0.1113

MEIW 14 9 >1642 >115.5 >3.894 >22.98 >7.85 >0.0821 >0.1113

MEIR 43 38 889.2 50.3 1.696 10.01 3.42 0.0445 0.0485

A-873 Near-Source 20 5 174.1 to 287.3 89.58 to 147.5 1.9143 to 3.1521 11.29 to 18.60 6.09 to 10.03 0.0087 to 0.0144 0.0547 to 0.0901

MEIW 61 46 82.78 to 136.6 30.8 to 50.73 0.6582 to 1.084 3.88 to 6.40 2.09 to 3.45 0.0041 to 0.0068 0.0188 to 0.0310

MEIR 167 152 25.02 to 41.29 7.122 to 11.73 0.1522 to 0.2507 0.90 to 1.48 0.48 to 0.80 0.0013 to 0.0021 0.0043 to 0.0072

A-883 Near-Source 20 12 1444 to 3611 63.65 to 158.4 1.511 to 3.761 8.92 to 22.19 4.33 to 10.77 0.0722 to 0.1806 0.0432 to 0.1075

MEIW 31 23 1089 to 2725 42.43 to 105.6 1.008 to 2.507 5.94 to 14.79 2.88 to 7.18 0.0545 to 0.1363 0.0288 to 0.0716

MEIR 20 12 1444 to 3611 63.65 to 158.4 1.511 to 3.761 8.92 to 22.19 4.33 to 10.77 0.0722 to 0.1806 0.0432 to 0.1075

1. Distance to receptor measured from the center of the volume source.

2. Distance to receptor measured from the building exterior (envelope).

3. These facilities use a Perc-containing brake cleaner which shows a Perc content range on the Material Safety Data Sheet; therefore, a range is presented for the results.

4. The receptor is located closer than 20 meters to the center of the volume source, which is the minimum distance modeled; therefore, the potential health impacts are likely to be greater than those listed here. 

 However, we do not anticipate that the potential health impacts will be significant. The impacts shown here are at the near-source location of 20 meters.
D-11

Table D-11. Summary of Modeling Results for Facilities A-89, A-90, A-93, and A-94

FACILITY RECEPTOR

TYPE

Receptor Distance

[meters]

Maximum

1-hour Conc.

(acute)

[μg/m3]

Maximum

1-hour Conc.

(annualized)

[μg/m3]

Maximum

Annual Avg.

Conc.

[μg/m3]

 Potential Cancer Risk 

[chances per million]

Hazard Index

Center1 Env.2 Resident Worker Acute Chronic

A-893 Near-Source 20 12 116.2 to 169 32.66 to 46.89 0.7755 to 1.113 4.58 to 6.57 2.22 to 3.19 0.0058 to 0.0085 0.0222 to 0.0318

MEIW 32 24 82.48 to 119.9 20.18 to 28.98 0.4792 to 0.6881 2.83 to 4.06 1.37 to 1.97 0.0041 to 0.0060 0.0137 to 0.0197

MEIR 84 76 28.28 to 41.12 5.309 to 7.623 0.1261 to 0.1810 0.74 to 1.07 0.36 to 0.52 0.0014 to 0.0021 0.0036 to 0.0052

A-903 Near-Source 20 16 3218 to 4652 44.91 to 64.62 1.024 to 1.473 6.04 to 8.69 3.1 to 4.4 0.1609 to 0.2326 0.0292 to 0.0421

MEIW419 15 >3218 to >4652 >44.91 to >64.62 >1.024 to >1.473 >6.04 to >8.69 >3.1 to >4.4 >0.1609 to >0.2326 >0.0292 to >0.0421

MEIR418 14 >3218 to >4652 >44.91 to >64.62 >1.024 to >1.473 >6.04 to >8.69 >3.1 to >4.4 >0.1609 to >0.2326 >0.0292 to >0.0421

A-933 Near-Source 20 11 1035 to 1497 66.51 to 96.74 1.737 to 2.527 10.3 to 14.9 4.5 to 6.6 0.0518 to 0.0749 0.0496 to 0.0722

MEIW 39 30 632.2 to 914.2 33.38 to 48.55 0.8718 to 1.268 5.14 to 7.48 2.27 to 3.30 0.0316 to 0.0457 0.0249 to 0.0362

MEIR417 8 >1035 to >1497 >66.51 to >96.74 >1.737 to >2.527 >10.3 to >14.9 >4.5 to >6.6 >0.0518 to >0.0749 >0.0496 to >0.0722

A-943 Near-Source 20 16 538 to 779 15.87 to 23.28 0.339 to 0.498 2.00 to 2.94 1.1 to 1.6 0.0269 to 0.0390 0.0097 to 0.0142

MEIW413 9 >538 to >779 >15.87 to >23.28 >0.339 to >0.498 >2.00 to >2.94 >1.1 to >1.6 >0.0269 to >0.0390 >0.0097 to >0.0142

MEIR 27 23 420 to 608.9 11.4 to 16.72 0.2436 to 0.3573 1.44 to 2.11 0.78 to 1.14 0.0210 to 0.0304 0.0070 to 0.0102

1. Distance to receptor measured from the center of the volume source.

2. Distance to receptor measured from the building exterior (envelope).

3. These facilities use a Perc-containing brake cleaner which shows a Perc content range on the Material Safety Data Sheet; therefore, a range is presented for the results.

4. The receptor is located closer than 20 meters to the center of the volume source, which is the minimum distance modeled; therefore, the potential health impacts are likely to be greater than those listed here. 

 However, we do not anticipate that the potential health impacts will be significant. The impacts shown here are at the near-source location of 20 meters.
D-12

B. Multicomponent-Using Facilities Modeled with SCREEN3

This section summarizes the results from our modeling for the 12 facilities that used products

that contained either Perc (P), MeCl (M), or TCE (T) or some combination of the three. Tables D-12

and D-13 present the modeling input parameters and tables D-14 thru D-16 summarize the results.

Table D-12. Modeling Input Parameters for Facilities D, G, M, S, A-20, and A-39

Parameter Value

Facility D Facility G1 Facility M Facility S Facility A-20 Facility A-39

Source Type Volume Volume Volume Volume Volume Volume

Facility Type Srvc. Sta. Fleet Dealership Brake Shop Gen Auto Gen Auto

Chlorinated Content [%] P:55, M:25 P:55, M:25 P:55, M:25 P:55, M:25 P:85, T:10 P:55, M:43

Perc Emission Rate - Ann.

[grams/s]

0.0096 0.0408 0.0408 0.0062 0.0146 0.0101

Perc Emission Rate - Acute

[grams/s]

0.0859 0.0408 0.1334 0.0124 0.0446 0.0303

MeCl Emission Rate - Ann.

[grams/s]

0.0044 0.0185 0.0185 0.0028 N/A 0.0079

MeCl Emission Rate - Acute

[grams/s]

0.0394 0.0185 0.0605 0.0056 N/A 0.0237

TCE Emission Rate - Ann.

[grams/s]

N/A N/A N/A N/A 0.0017 N/A

TCE Emission Rate - Acute

[grams/s]

N/A N/A N/A N/A 0.0052 N/A

Receptor Height [m] 0 0 0 0 0 0

Source Release Height [m] 2.286 1.829 3.658 2.591 2.743 2.438 4.572

Initial Lateral Dimension of

Volume [m]

3.246 2.761 10.07 5.316 2.835 1.772 4.962

Initial Vertical Dimension of

Volume [m]

2.127 1.701 2.127 2.410 2.552 2.268 4.253

Met Option - Annual/Acute Full Full Full Full Class 4/Full Class 4/Full

Land Type (Urban or Rural) Urban Urban Urban Urban Urban Urban

Operating Schedule [hrs/wk] 54 42.5 42.5 50 55 60

1. Due to the relationship between the exterior building dimensions to the location of the actual service area, two SCREEN3 runs were completed. The 

 data in the left-hand column is used to calculate the non-cancer acute hazard index and the data in the right-hand column is used to calculate overall 

 cancer risk and chronic non-cancer hazard index.
D-13

Table D-13. Modeling Input Parameters for Facilities A-49, A-63, A-71, A-72, A-82, and A-85

Parameter Value

Facility 

A-49

Facility 

A-63

Facility 

A-71

Facility 

A-72

Facility 

A-82

Facility 

A-85

Source Type Volume Volume Volume Volume Volume Volume

Facility Type General

Automotive

General

Automotive

General

Automotive

General

Automotive

General

Automotive

General

Automotive

Chlorinated Content [%] P:55, M:25 P:55, M:25 P:55, M:25 P:55, M:25 P:98, M:0.5 P:98, M:0.5

Perc Emission Rate - Ann.

[grams/s]

0.0091 0.0010 0.0010 0.0027 0.0144 0.0283

Perc Emission Rate - Acute

[grams/s]

0.0867 0.0434 0.0434 0.1198 0.0417 0.1388

MeCl Emission Rate - Ann.

[grams/s]

0.0042 0.0005 0.0004 0.0012 0.0001 0.0001

MeCl Emission Rate - Acute

[grams/s]

0.0394 0.0197 0.0197 0.0544 0.0002 0.0007

TCE Emission Rate - Ann.

[grams/s]

N/A N/A N/A N/A N/A N/A

TCE Emission Rate - Acute

[grams/s]

N/A N/A N/A N/A N/A N/A

Receptor Height [m] 0 0 0 0 0 0

Source Release Height [m] 2.286 3.810 2.438 2.743 3.048 2.591

Initial Lateral Dimension of

Volume [m]

3.544 2.127 1.914 3.544 2.481 1.772

Initial Vertical Dimension of

Volume [m]

2.127 3.544 2.268 2.552 2.835 2.410

Met Option - Annual Class 4 Class 4 Class 4 Class 4 Class 4 Class 4

Met Option - Acute Full Full Full Full Full Full

Land Type (Urban or Rural) Urban Urban Urban Urban Urban Urban

Operating Schedule [hrs/wk] 47.5 42.5 45 45 58 49
D-14

Table D-14. Summary of Modeling Results for Facilities D, G, M, and S

FACILITY RECEPTOR

TYPE

Receptor Distance

[meters]

 Potential Cancer Risk 

[chances per million]

Hazard Index

Center1 Env.2 Resident Worker Acute Chronic

D Near-Source 25 2 17.77 7.99 0.0807 0.0831

MEIW 55 32 8.31 3.73 0.0375 0.0388

MEIR 175 152 1.63 0.73 0.0074 0.0076

G Near-Source 25 3 21.54 12.30 0.0421 0.1007

MEIW 50 28 15.26 8.71 0.0201 0.0713

MEIR 420 398 1.15 0.66 0.0008 0.0054

M Near-Source 20 9 45.66 26.07 0.0960 0.2135

MEIW 26 15 39.50 22.55 0.0831 0.1847

MEIR 31 20 35.01 19.99 0.0736 0.1637

S Near-Source 20 14 11.76 5.71 0.0128 0.0550

MEIW 47 41 5.73 2.78 0.0062 0.0268

MEIR 466 460 0.20 0.10 0.0002 0.0009

1. Distance to receptor measured from the center of the volume source.

2. Distance to receptor measured from the building exterior (envelope).
D-15

Table D-15. Summary of Modeling Results for Facilities A-20, A-39, A-49, and A-63

FACILITY RECEPTOR

TYPE

Receptor Distance

[meters]

 Potential Cancer Risk 

[chances per million]

Hazard Index

Center1 Env.2 Resident Worker Acute Chronic

A-20 Near-Source 20 16 26.58 11.73 0.0386 0.1245

MEIW 53 49 7.42 3.27 0.0141 0.0348

MEIR 50 46 8.10 3.57 0.0152 0.0380

A-39 Near-Source 20 9 9.73 3.94 0.0086 0.0389

MEIW 34 23 6.52 2.63 0.0066 0.0261

MEIR 57 46 3.80 1.54 0.0045 0.0152

A-49 Near-Source 20 12 11.33 5.79 0.0899 0.0529

MEIW314 6 >11.33 >5.79 >0.0899 >0.0529

MEIR 38 30 5.60 2.86 0.0539 0.0262

A-63 Near-Source 20 15 1.03 0.59 0.0395 0.0048

MEIW38 3 >1.03 >0.59 >0.0395 >0.0048

MEIR 2419 2414 <0.01 <0.01 <0.0001 <0.0001

1. Distance to receptor measured from the center of the volume source.

2. Distance to receptor measured from the building exterior (envelope).

3. The receptor is located closer than 20 meters to the center of the volume source, which is the minimum distance modeled; therefore, the potential

 health impacts are likely to be greater than those listed here. However, we do not anticipate that the potential health impacts will be significant. 

 The impacts shown here are at the near-source location of 20 meters.
D-16

Table D-16. Summary of Modeling Results for Facilities A-71, A-72, A-82, and A-85

FACILITY RECEPTOR

TYPE

Receptor Distance

[meters]

 Potential Cancer Risk 

[chances per million]

Hazard Index

Center1 Env.2 Resident Worker Acute Chronic

A-71 Near-Source 20 16 1.45 0.78 0.0598 0.0068

MEIW319 15 >1.45 >0.78 >0.0598 >0.0068

MEIR 34 30 0.77 0.42 0.0371 0.0036

A-72 Near-Source 20 12 2.85 1.54 0.1080 0.0133

MEIW 29 21 2.03 1.10 0.0842 0.0095

MEIR 61 53 0.77 0.42 0.0407 0.0036

A-82 Near-Source 20 15 20.30 8.49 0.0276 0.0983

MEIW 42 37 8.90 3.72 0.0150 0.0431

MEIR 42 37 8.90 3.72 0.0150 0.0431

A-85 Near-Source 20 16 42.60 21.09 0.1231 0.2062

MEIW312 8 >42.60 >21.09 >0.1231 >0.2062

MEIR 34 30 22.74 11.26 0.0765 0.1101

1. Distance to receptor measured from the center of the volume source.

2. Distance to receptor measured from the building exterior (envelope).

3. The receptor is located closer than 20 meters to the center of the volume source, which is the minimum distance modeled; therefore, the potential

 health impacts are likely to be greater than those listed here. However, we do not anticipate that the potential health impacts will be significant. 

 The impacts shown here are at the near-source location of 20 meters.
D-17

C. Perchloroethylene-Using Facilities Modeled with ISCST3

This section summarizes the results from our modeling of the 13 facilities that used Perc-containing brake cleaning products which

did not contain either MeCl or TCE using regional-specific meteorological (met) data and ISCST3. Tables D-17 thru D-19 present the

modeling input parameters and tables D-20 thru D-22 summarize the modeling results.

Table D-17. ISCST3 Modeling Parameters - 13 Specific Facilities1

Facility Facility

Type

Emission Rate [g/s] Perc

Content

[%]

Release

Height

[m]

Approx.

Length

[m]

Approx.

Width

[m] 

Approx.

Height

[m]

Dispersion

Coefficient

Number of

L x L 

Acute Annual Volumes

A-07 Gen Auto 0.0973 to 0.1407 0.0201 to 0.0291 65 to 94 2.3 30.5 10.7 4.6 Urban 3

A-08 Gen Auto 0.0487 to 0.0704 0.0330 to 0.0477 65 to 94 2.3 22.9 9.1 4.6 Urban 3

A-09 Gen Auto 0.0604 to 0.0874 0.0594 to 0.0859 65 to 94 3.8 21.3 13.7 7.6 Urban 2

A-28 Fleet 0.0608 to 0.0880 0.0080 to 0.0115 65 to 94 4.5 15.2 15.2 9.1 Urban 1

A-52 Gen Auto 0.1701 to 0.1871 0.0167 to 0.0183 90 to 99 2.3 15.2 7.6 4.6 Urban 2

A-83 Gen Auto 0.0389 to 0.0563 0.0220 to 0.0319 65 to 94 3.0 24.4 9.1 6.1 Urban 3

A-86 Dealership 0.0747 to 0.1232 0.0367 to 0.0606 60 to 99 5.0 53.3 33.5 10.0 Urban 2

A-92 Svc Sta 0.0973 to 0.1407 0.0062 to 0.0090 65 to 94 2.6 15.2 7.6 5.2 Urban 2

I Fleet 0.1817 to 0.2633 0.0236 to 0.0342 65 to 94 4.7 62.8 22.3 9.5 Urban 3

O Gen Auto 0.1946 to 0.2815 0.0087 to 0.0125 65 to 94 3.0 18.3 15.2 6.1 Urban 1

P Brake Shop 0.0182 to 0.0263 0.0043 to 0.0061 65 to 94 3.0 18.3 10.7 6.1 Urban 2

T Gen Auto 0.0374 0.0166 99 3.0 21.3 9.1 6.1 Urban 2

U Gen Auto 0.0389 to 0.0562 0.0097 to 0.0141 65 to 94 3.0 18.3 9.1 6.1 Urban 2

1. All facilities modeled as a volume source with receptor height set to zero. All facilities, except Facility T, use a Perc-containing brake cleaner which shows a Perc content range on the 

 Material Safety Data Sheet; therefore, a range is presented for the results
D-18

 Table D-18. ISCST3 Modeling Parameters - 13 Specific Facilities (cont.)

Facility Operating Schedule

[hrs/wk]

Open Hours Open

Days

Meteorology 

Data Set

A-07 58 8:00 am - 6:00 pm

8:00 am - 4:00 pm

Mon - Fri

Sat

Oakland 1960-64

A-08 59 8:00 am - 6:00 pm

8:00 am - 5:00 pm

Mon - Fri

Sat

Oakland 1960-64

A-09 59 8:00 am - 6:00 pm

8:00 am - 5:00 pm

Mon - Fri

Sat

Oakland 1960-64

A-28 122.5 5:00 am - 10:30 pm Mon - Sun McClellan AFB 1953-57

A-52 51 8:00 am - 5:00 pm

8:00 am - 2:00 pm

Mon - Fri

Sat

LAX 1985-89

A-83 53 8:00 am - 6:00 pm

8:00 am - 4:00 pm

Mon - Fri

Sat

Redding 1987-89

A-86 60 7:00 am - 6:00 pm

9:00 am - 2:00 pm

Mon - Fri

Sat

Fresno 1985-89

A-92 47 7:30 am - 4:00 pm

7:30 am - 12:00 pm

Mon - Fri

Sat

Fresno 1985-89

I 92.5 6:30 am - 1:00 am Mon - Fri Sac Exec 1987, 1989-92

O 45 9:00 am - 6:00 pm Mon - Fri Concord 1991-96

P 60 8:00 am - 6:00 pm Mon - Sat Mather AFB 1953-57

T 56.5 8:00 am - 5:30 pm

8:00 am - 5:00 pm

Mon - Fri

Sat

Burbank 1958-62

U 60 8:00 am - 6:00 pm Mon - Sat Anaheim 1981

Table D-19. ISCST3 Modeling Parameters - 13 Specific Facilities (cont.)

ISCST3 Receptor Networks Used

Grid Name (Type) Cell Size Number of Cells Location

COARSE (Cartesian) 1000 m x 1000 m 31 x 31 = 961 Centered on Source Centroid

FINE (Cartesian) 100 m x 100 m 31 x 31 = 961 Centered on Source Centroid

VFINE (Cartesian) 20 m x 20 m 26 x 26 = 676 Centered on Source Centroid
D-19

Table D-20. Detailed Listing of ISCST3 Modeling Results - 13 Specific Facilities

FACILITY RECEPTOR

TYPE

Receptor Distance

[meters]

Approximate

Direction

From Facility

[Deg]3

Maximum

Annual

Concentration

[μg/m3]

Maximum

Hourly

Concentration

[μg/m3]

 Potential Cancer Risk 

[chances per million]

Hazard Index

Center1 Env.2 Resident Worker Acute Chronic

A-074 Near-Source 32 27 108 2.271 to 3.288 489.1 to 707.3 13.4 to 19.4 5.61 to 8.12 0.0245 to 0.0354 0.0649 to 0.0940

MEIW 51 46 79 0.945 to 1.368 191.1 to 276.3 5.57 to 8.07 2.33 to 3.38 0.0096 to 0.0138 0.0270 to 0.0391

MEIR 32 27 108 2.271 to 3.288 310.9 to 449.7 13.4 to 19.4 5.61 to 8.12 0.0155 to 0.0225 0.0649 to 0.0940

A-084 Near-Source 32 27 108 4.851 to 7.012 272.6 to 394.0 28.62 to 41.37 11.77 to 17.01 0.0136 to 0.0197 0.1386 to 0.2003

MEIW 32 27 132 3.234 to 4.675 264.4 to 382.3 19.08 to 27.58 7.85 to 11.34 0.0132 to 0.0191 0.0924 to 0.1336

MEIR 32 27 0 1.320 to 1.908 149.8 to 216.6 7.79 to 11.26 3.20 to 4.63 0.0075 to 0.0108 0.0377 to 0.0545

A-094 Near-Source 32 25 108 7.009 to 10.14 207.9 to 300.8 41.35 to 59.80 17.01 to 24.59 0.0104 to 0.0150 0.2003 to 0.2896

MEIW 32 25 0 1.901 to 2.749 140.9 to 203.9 11.21 to 16.22 4.61 to 6.67 0.0070 to 0.0102 0.0543 to 0.0785

MEIR 32 25 108 7.009 to 10.14 186.6 to 270.0 41.35 to 59.80 17.01 to 24.59 0.0093 to 0.0135 0.2003 to 0.2896

A-284 Near-Source 32 24 342 2.075 to 3.002 326.5 to 472.6 12.24 to 17.71 2.42 to 3.51 0.0163 to 0.0236 0.0593 to 0.0858

MEIW 130 122 0 0.254 to 0.368 74.72 to 108.2 1.50 to 2.17 0.30 to 0.43 0.0037 to 0.0054 0.0073 to 0.0105

MEIR 91 83 174 0.159 to 0.230 122.8 to 177.7 0.94 to 1.36 0.19 to 0.27 0.0061 to 0.0089 0.0045 to 0.0066

A-524 Near-Source 32 28 72 to 108 1.670 to 1.830 866.8 to 953.5 9.85 to 10.80 4.69 to 5.14 0.0433 to 0.0477 0.0477 to 0.0523

MEIW 32 28 108 1.603 to 1.757 477.8 to 525.6 9.46 to 10.37 4.50 to 4.93 0.0239 to 0.0263 0.0458 to 0.0502

MEIR 46 42 311 0.468 to 0.512 697.1 to 766.7 2.76 to 3.02 1.31 to 1.44 0.0349 to 0.0383 0.0134 to 0.0146

1. Distance to receptor measured from the center of the volume source.

2. Distance to receptor measured from the short side of the building exterior (envelope).

3. For near-source, not applicable for acute values.

4. These facilities use a Perc-containing brake cleaner which shows a Perc content range on the Material Safety Data Sheet; therefore, a range is presented for the results.
D-20

Table D-21. Summary of ISCST3 Modeling Results - 13 Specific Facilities (cont.)

FACILITY RECEPTOR

TYPE

Receptor Distance

[meters]

Approximate

direction

From Facility

[Deg]

Maximum

Annual

Concentration

[μg/m3]

Maximum

Hourly

Concentration

[μg/m3]

 Potential Cancer Risk 

[chances per million]

Hazard Index

Center1 Env.2 Resident Worker Acute Chronic

A-834 Near-Source 32 27 162 2.090 to 3.031 247.6 to 358.3 12.33 to 17.88 5.65 to 8.19 0.0124 to 0.0179 0.0597 to 0.0866

MEIW 32 27 342 1.584 to 2.297 138.1 to 199.9 9.35 to 13.55 4.28 to 6.20 0.0069 to 0.0100 0.0453 to 0.0656

MEIR 35 30 180 1.650 to 2.393 154.5 to 223.6 9.74 to 14.12 4.46 to 6.46 0.0077 to 0.0112 0.0471 to 0.0684

A-864 Near-Source 51 34 101 - 135 1.358 to 2.242 119.1 to 196.4 8.01 to 13.23 3.19 to 5.26 0.0060 to 0.0098 0.0388 to 0.0641

MEIW 168 151 287 0.147 to 0.242 44.60 to 73.55 0.87 to 1.43 0.34 to 0.57 0.0022 to 0.0037 0.0042 to 0.0069

MEIR 158 141 108 0.220 to 0.364 31.75 to 52.36 1.30 to 2.15 0.52 to 0.85 0.0016 to 0.0026 0.0063 to 0.0104

A-924 Near-Source 32 28 108 0.546 to 0.792 582.8 to 842.8 3.22 to 4.67 1.66 to 2.41 0.0291 to 0.0421 0.0156 to 0.0226

MEIW 32 28 288 0.452 to 0.657 574.4 to 830.6 2.67 to 3.88 1.38 to 2.00 0.0287 to 0.0415 0.0129 to 0.0188

MEIR 58 54 229 0.056 to 0.081 175.9 to 254.4 0.33 to 0.48 0.17 to 0.25 0.0088 to 0.0127 0.0016 to 0.0023

I

4 Near-Source 51 40 349 - 11 1.864 to 2.702 405.4 to 587.5 11.00 to 15.94 2.89 to 4.18 0.0203 to 0.0294 0.0533 to 0.0772

MEIW 95 84 18 0.708 to 1.026 174.5 to 252.8 4.18 to 6.05 1.10 to 1.59 0.0087 to 0.0126 0.0202 to 0.0293

MEIR 157 146 27 0.307 to 0.445 120.8 to 175.1 1.81 to 2.62 0.47 to 0.69 0.0060 to 0.0088 0.0088 to 0.0127

O4 Near-Source 32 24 162 0.770 to 1.113 1428 to 2065 4.54 to 6.57 2.45 to 3.54 0.0714 to 0.1032 0.0220 to 0.0318

MEIW 32 24 180 0.709 to 1.026 1413 to 2043 4.18 to 6.05 2.26 to 3.26 0.0706 to 0.1021 0.0203 to 0.0293

MEIR 100 92 270 0.009 to 0.013 416.3 to 602.1 0.05 to 0.07 0.03 to 0.04 0.0208 to 0.0301 0.0002 to 0.0004

1. Distance to receptor measured from the center of the volume source.

2. Distance to receptor measured from the short side of the building exterior (envelope).

3. For near-source, not applicable for acute values.

4. These facilities use a Perc-containing brake cleaner which shows a Perc content range on the Material Safety Data Sheet; therefore, a range is presented for the results.
D-21

Table D-22. Summary of ISCST3 Modeling Results - 13 Specific Facilities (cont.)

FACILITY RECEPTOR

TYPE

Receptor Distance

[meters]

Approximate

direction

From Facility

[Deg]

Maximum

Annual

Concentration

[μg/m3]

Maximum

Hourly

Concentration

[μg/m3]

 Potential Cancer Risk 

[chances per million]

Hazard Index

Center1 Env.2 Resident Worker Acute Chronic

P

4 Near-Source 32 27 342 - 72 0.387 to 0.559 59.83 to 86.43 2.28 to 3.30 0.92 to 1.33 0.0030 to 0.0043 0.0111 to 0.0160

MEIW 32 27 0 0.298 to 0.430 39.65 to 57.29 1.76 to 2.54 0.71 to 1.03 0.0020 to 0.0029 0.0085 to 0.0123

MEIR 42 37 225 0.034 to 0.049 46.15 to 66.67 0.20 to 0.29 0.08 to 0.12 0.0023 to 0.0033 0.0010 to 0.0014

T

4 Near-Source 32 27 288 - 342 2.517 218.6 14.85 6.38 0.0109 0.0719

MEIW 32 27 0 2.236 117.8 13.19 5.66 0.0059 0.0639

MEIR 32 27 0 2.236 117.8 13.19 5.66 0.0059 0.0639

U

4 Near-Source 32 27 72 3.279 to 4.738 237.8 to 343.7 19.35 to 27.96 7.82 to 11.31 0.0108 to 0.0156 0.0937 to 0.1354

MEIW 32 27 342 1.207 to 1.743 134.4 to 194.2 7.12 to 10.29 2.88 to 4.16 0.0067 to 0.0097 0.0345 to 0.0498

MEIR 32 27 72 3.279 to 4.738 179.0 to 258.7 19.35 to 27.96 7.82 to 11.31 0.0090 to 0.0129 0.0937 to 0.1354

1. Distance to receptor measured from the center of the volume source.

2. Distance to receptor measured from the short side of the building exterior (envelope).

3. For near-source, not applicable for acute values.

4. These facilities use a Perc-containing brake cleaner which shows a Perc content range on the Material Safety Data Sheet; therefore, a range is presented for the results.
D-22

D. Generic Facilities

This section summarizes the input parameters and results for the three generic facilities

that were developed. All generic facility modeling were done using ISCST3 and consider Perc,

MeCl, and TCE usage from brake cleaning products, carburetor cleaners, engine degreasers, and

general degreasers. Tables D-23 thru D-26 present the modeling input parameters. The

modeling results are summarized on pages D-25 thru D-204. For more information on how the

generic facilities were developed, please see Appendix F.

Table D-23. ISCST3 Modeling Parameters - 3 Generic Facilities

Facility Applicable

Facility Types

Release

Height

[m]

Approx.

Length

[m]

Approx.

Width

[m] 

Approx.

Height

[m]

Number of

L x L 

Volumes

G-01 General Automotive,

Brake Shop, Service

Station, Dealership

2.5 12.2 7.6 4.9 2

G-02 General Automotive,

Brake Shop, Service

Station., Dealership,

Fleet

3.8 21.3 13.7 7.6 2

G-03 General Automotive,

Dealership, Fleet

3.8 62.5 21.3 7.6 3

Table D-24. ISCST3 Modeling Parameters - 3 Generic Facilities (cont.)

Facility Operating Schedule

[hrs/wk]

Open Hours Open Days Meteorology 

Data Sets

G-01

G-02

G-03

57 8:00 am - 5:00 pm

8:00 am - 2:00 pm

Mon - Fri

Sat

Oakland 1960-64

McClellan AFB 1953-57

LAX 1985-89

Redding 1987-89

Fresno 1985-89

Sac Exec 1987, 1989-92

Concord 1991-96

Mather AFB 1953-57

Burbank 1958-62

Anaheim 1981 
D-23

Table D-25. ISCST3 Modeling Parameters - 3 Generic Facilities (cont.)

Facility

Base Emission Rates [g/s]1

Acute

(65%)

Annualized

(65%)

Acute

(94%)

Annualized

(94%)

G-01 0.0973 0.0341 0.1407 0.0494

G-02 0.1946 0.1024 0.2815 0.1481

G-03 0.1946 0.1024 0.2815 0.1481

1. The model is run using a unit emission rate of 1 gram per second. Calculation of base emission rates at 65% and 94% chlorinated content

 (by weight) simplifies the consideration of the variety of modeling scenarios summarized on pages D-25 through D-204.

Table D-26. ISCST3 Modeling Parameters - General Assumptions

General Assumptions

In conducting the ISCST3 modeling for the generic facilities, the following general assumptions were used:

< All facilities modeled as volume sources.

< Dispersion coefficient set to URBAN, receptor height set to ZERO

< Twenty brake jobs per week (1040 per year) for facility G-01, 60 per week (3120 per year) for facility

G-02 and G-03. This estimate is based on data collected from the Brake Cleaner and Perc-Containing

Automotive Products (Manufacturers) Survey, the Automotive Service Facility Questionnaire (Facility

Survey), and facility site visits (see Appendix B) and is designed such that product usage on other

activities is automatically included (see Appendix F).

< One 19-oz can (539 grams) at 65% and 94% component content per brake job, which is the average

chlorinated can size and usage rate supported by the site visits, the Facility Survey, and the Norton

Study.

< Facility operating schedule of 2964 hours per year (57 hours per week), which is the average operating

schedule reported during the site visits.

< No more than one brake job per hour for facility G-01; no more than 2 brake jobs per

hour for facilities G-02 and G-03. Based on the operating hours at a facility, the estimated number of

service bays, and the reported jobs per week, multiple brake jobs can occur simultaneously at the G-02

and G-03 facilities. This estimate affects acute health impacts.

< Polar receptor network, centered on source centroid, with 2160 receptors (polar network consists of 60

radials separated by angular distances of 6 degrees and having receptors at the following radial distances:

20, 30, 40, 50, 60, 70, 80, 90, 100, 120, 140, 150, 160, 180, 200, 250, 300, 350, 400, 450, 500, 600,

700, 800, 900, 1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000, and 23000 meters).
D-24

The generic facilities considered a number of scenarios. Table D-27 summarizes the

modeling scenarios that were considered under generic facility modeling.

Table D-27. Representative Product Formulations Used in Generic Facility Modeling

Product Category

Brake Cleaners Carburetor Cleaners Engine Degreasers General Degreasers

All met locations:

o 94% Perc

o 65% Perc

Four met locations1

:

o 55% Perc, 25% MeCl

o 40% Perc, 30% MeCl, 20% TCE

o 55% Perc, 43% TCE

Single composite

based on2:

o 68% Perc

o 57% MeCl

Single composite

based on2:

o 47% Perc

o 99% TCE

Single composite 

based on2:

o 24% Perc

o 10% Perc, 86%

TCE

o 51% MeCl

o 98% TCE

1. Burbank, Anaheim, Oakland and default met for chronic effects; Fresno, Concord, Mather, and default met for acute effects.

2. Composite is based on average of 10 met sets. Default met is considered independently.

For more information on how composite formulations were derived, please see Appendix F.

Due to the volume of data, the multicomponent products were calculated for the met data

sets that gave the lowest, mid-range, and highest potential health impacts for acute and chronic

emissions. For chronic emissions (cancer and chronic impacts), the met data sets presented are

Oakland (low), Burbank (mid-range), and Anaheim (high). For acute emissions, the met data

sets presented are Mather (low), Fresno (mid-range), and Concord (high). Additionally, default

meteorology was considered for each of the multicomponent scenarios and composite

formulations. Any representative formulation listed within this Appendix does not necessarily

represent a specific product from a specific manufacturer. Generic facility modeling results are

summarized on pages D-25 through D-204.
Risk Assessment Summary - 3 Generic Facilities

Brake Cleaners

Facility G-01 - 65% Perc

Met Set: Burbank Met Set: Concord

op hrs/wk: 57 Acu Rate [g/s]: 0.0973 op hrs/wk: 57 Acu Rate [g/s]: 0.0973

Ann Rate [g/s]: 0.0341 Ann Rate [g/s]: 0.0341

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 162.66 32.73 13.93 0.1585 12417.79 0.0604 20 161.57 32.51 13.84 0.1574 12417.79 0.0604

30 86.38 17.38 7.40 0.0842 9254.67 0.0450 30 86.18 17.34 7.38 0.0840 9254.67 0.0450

40 53.51 10.77 4.58 0.0521 7114.91 0.0346 40 53.59 10.78 4.59 0.0522 7114.91 0.0346

50 36.43 7.33 3.12 0.0355 5625.45 0.0274 50 36.58 7.36 3.13 0.0356 5625.45 0.0274

60 26.41 5.31 2.26 0.0257 4555.43 0.0222 60 26.58 5.35 2.28 0.0259 4555.43 0.0222

80 15.71 3.16 1.35 0.0153 3163.52 0.0154 80 15.87 3.19 1.36 0.0155 3163.52 0.0154

100 10.41 2.09 0.89 0.0101 2329.1 0.0113 100 10.55 2.12 0.90 0.0103 2329.1 0.0113

150 4.86 0.98 0.42 0.0047 1281.78 0.0062 150 4.95 1.00 0.42 0.0048 1281.78 0.0062

200 2.81 0.57 0.24 0.0027 820.22 0.0040 200 2.86 0.58 0.24 0.0028 820.22 0.0040

250 1.83 0.37 0.16 0.0018 575.61 0.0028 250 1.87 0.38 0.16 0.0018 575.61 0.0028

500 0.48 0.10 0.04 0.0005 189.47 0.0009 500 0.49 0.10 0.04 0.0005 189.47 0.0009

1000 0.12 0.02 0.01 0.0001 64.58 0.0003 1000 0.14 0.03 0.01 0.0001 64.58 0.0003

Met Set: Fresno Met Set: LAX

op hrs/wk: 57 Acu Rate [g/s]: 0.0973 op hrs/wk: 57 Acu Rate [g/s]: 0.0973

Ann Rate [g/s]: 0.0341 Ann Rate [g/s]: 0.0341

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 130.29 26.21 11.16 0.1269 11155.5 0.0543 20 94.40 18.99 8.08 0.0920 8382.67 0.0408

30 68.87 13.86 5.90 0.0671 8402.65 0.0409 30 50.61 10.18 4.33 0.0493 5996.68 0.0292

40 42.46 8.54 3.64 0.0414 6521.95 0.0317 40 31.53 6.34 2.70 0.0307 4610.19 0.0224

50 28.78 5.79 2.46 0.0280 5186.31 0.0252 50 21.53 4.33 1.84 0.0210 3645.08 0.0177

60 20.79 4.18 1.78 0.0203 4214.74 0.0205 60 15.65 3.15 1.34 0.0152 2951.75 0.0144

80 12.29 2.47 1.05 0.0120 2937.5 0.0143 80 9.34 1.88 0.80 0.0091 2049.84 0.0100

100 8.11 1.63 0.69 0.0079 2165.55 0.0105 100 6.20 1.25 0.53 0.0060 1509.17 0.0073

150 3.76 0.76 0.32 0.0037 1191.61 0.0058 150 2.91 0.59 0.25 0.0028 953.49 0.0046

200 2.16 0.43 0.18 0.0021 761.38 0.0037 200 1.68 0.34 0.14 0.0016 744.04 0.0036

250 1.40 0.28 0.12 0.0014 533.41 0.0026 250 1.10 0.22 0.09 0.0011 611.79 0.0030

500 0.36 0.07 0.03 0.0004 174.25 0.0008 500 0.29 0.06 0.02 0.0003 331.07 0.0016

1000 0.09 0.02 0.01 0.0001 58.67 0.0003 1000 0.08 0.02 0.01 0.0001 181.35 0.0009

D-25
Facility G-01 - 65% Perc

(cont.)

Met Set: McClellan Met Set: Mather

op hrs/wk: 57 Acu Rate [g/s]: 0.0973 op hrs/wk: 57 Acu Rate [g/s]: 0.0973

Ann Rate [g/s]: 0.0341 Ann Rate [g/s]: 0.0341

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 101.05 20.33 8.65 0.0985 11007.62 0.0536 20 96.52 19.42 8.27 0.0940 8470.5 0.0412

30 53.37 10.74 4.57 0.0520 8490.17 0.0413 30 50.95 10.25 4.36 0.0496 5762.29 0.0280

40 32.93 6.63 2.82 0.0321 6665.94 0.0324 40 31.40 6.32 2.69 0.0306 4464.6 0.0217

50 22.34 4.49 1.91 0.0218 5343.61 0.0260 50 21.29 4.28 1.82 0.0207 3545.55 0.0172

60 16.15 3.25 1.38 0.0157 4368.46 0.0213 60 15.38 3.09 1.32 0.0150 2878.6 0.0140

80 9.57 1.93 0.82 0.0093 3069.77 0.0149 80 9.10 1.83 0.78 0.0089 2004.05 0.0097

100 6.32 1.27 0.54 0.0062 2275.44 0.0111 100 6.00 1.21 0.51 0.0058 1477.56 0.0072

150 2.93 0.59 0.25 0.0029 1262.34 0.0061 150 2.78 0.56 0.24 0.0027 819.7 0.0040

200 1.69 0.34 0.14 0.0016 810.41 0.0039 200 1.60 0.32 0.14 0.0016 527.32 0.0026

250 1.09 0.22 0.09 0.0011 569.61 0.0028 250 1.03 0.21 0.09 0.0010 371.22 0.0018

500 0.28 0.06 0.02 0.0003 187.81 0.0009 500 0.27 0.05 0.02 0.0003 122.78 0.0006

1000 0.07 0.01 0.01 0.0001 63.95 0.0003 1000 0.07 0.01 0.01 0.0001 41.91 0.0002

Met Set: Oakland Met Set: Redding

op hrs/wk: 57 Acu Rate [g/s]: 0.0973 op hrs/wk: 57 Acu Rate [g/s]: 0.0973

Ann Rate [g/s]: 0.0341 Ann Rate [g/s]: 0.0341

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 91.71 18.45 7.85 0.0894 10519.95 0.0512 20 112.58 22.65 9.64 0.1097 11399.88 0.0555

30 49.17 9.89 4.21 0.0479 8021.08 0.0390 30 59.73 12.02 5.12 0.0582 8620.94 0.0419

40 30.65 6.17 2.62 0.0299 6281.76 0.0306 40 36.97 7.44 3.17 0.0360 6686.72 0.0325

50 20.94 4.21 1.79 0.0204 5029.68 0.0245 50 25.14 5.06 2.15 0.0245 5317.3 0.0259

60 15.22 3.06 1.30 0.0148 4106.19 0.0200 60 18.21 3.66 1.56 0.0177 4322.64 0.0210

80 9.09 1.83 0.78 0.0089 2877.44 0.0140 80 10.81 2.17 0.93 0.0105 3016 0.0147

100 6.04 1.22 0.52 0.0059 2127.42 0.0103 100 7.16 1.44 0.61 0.0070 2226.16 0.0108

150 2.83 0.57 0.24 0.0028 1174.14 0.0057 150 3.33 0.67 0.29 0.0032 1228.45 0.0060

200 1.64 0.33 0.14 0.0016 750.86 0.0037 200 1.92 0.39 0.16 0.0019 789.26 0.0038

250 1.07 0.22 0.09 0.0010 526.14 0.0026 250 1.25 0.25 0.11 0.0012 555.62 0.0027

500 0.28 0.06 0.02 0.0003 171.69 0.0008 500 0.32 0.06 0.03 0.0003 183.77 0.0009

1000 0.07 0.01 0.01 0.0001 57.64 0.0003 1000 0.08 0.02 0.01 0.0001 62.72 0.0003

D-26
Facility G-01 - 65% Perc

(cont.)

Met Set: Sacramento Met Set: Anaheim

op hrs/wk: 57 Acu Rate [g/s]: 0.0973 op hrs/wk: 57 Acu Rate [g/s]: 0.0973

Ann Rate [g/s]: 0.0341 Ann Rate [g/s]: 0.0341

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 105.61 21.25 9.04 0.1029 11198.97 0.0545 20 219.02 44.06 18.76 0.2134 12413.44 0.0604

30 55.98 11.26 4.79 0.0545 8535.41 0.0415 30 115.95 23.33 9.93 0.1130 9249.49 0.0450

40 34.62 6.97 2.96 0.0337 6652.15 0.0324 40 71.59 14.40 6.13 0.0697 7109.62 0.0346

50 23.52 4.73 2.01 0.0229 5306.72 0.0258 50 48.59 9.78 4.16 0.0473 5620.4 0.0273

60 17.03 3.43 1.46 0.0166 4323.84 0.0210 60 35.13 7.07 3.01 0.0342 4550.74 0.0221

80 10.10 2.03 0.86 0.0098 3025.89 0.0147 80 20.81 4.19 1.78 0.0203 3159.6 0.0154

100 6.68 1.34 0.57 0.0065 2237.71 0.0109 100 13.75 2.77 1.18 0.0134 2325.83 0.0113

150 3.11 0.63 0.27 0.0030 1238.17 0.0060 150 6.38 1.28 0.55 0.0062 1279.62 0.0062

200 1.79 0.36 0.15 0.0017 794.14 0.0039 200 3.67 0.74 0.31 0.0036 818.68 0.0040

250 1.16 0.23 0.10 0.0011 557.98 0.0027 250 2.38 0.48 0.20 0.0023 574.45 0.0028

500 0.30 0.06 0.03 0.0003 184.01 0.0009 500 0.61 0.12 0.05 0.0006 189.33 0.0009

1000 0.08 0.02 0.01 0.0001 62.75 0.0003 1000 0.16 0.03 0.01 0.0002 64.55 0.0003

Met Set: Default - 0

op hrs/wk: 57 Acu Rate [g/s]: 0.0973

Ann Rate [g/s]: 0.0341

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 307.03 61.77 26.29 0.2991 11342.73 0.0552

30 229.98 46.27 19.70 0.2241 8496.33 0.0413

40 178.09 35.83 15.25 0.1735 6579.11 0.0320

50 141.80 28.53 12.14 0.1382 5238.72 0.0255

60 115.56 23.25 9.90 0.1126 4269.33 0.0208

80 81.09 16.32 6.95 0.0790 2995.85 0.0146

100 60.18 12.11 5.15 0.0586 2223.11 0.0108

150 33.55 6.75 2.87 0.0327 1239.31 0.0060

200 21.63 4.35 1.85 0.0211 799.09 0.0039

250 15.25 3.07 1.31 0.0149 563.57 0.0027

500 5.08 1.02 0.43 0.0049 187.51 0.0009

1000 1.74 0.35 0.15 0.0017 64.26 0.0003

D-27
Risk Assessment Summary - 3 Generic Facilities

Brake Cleaners

Facility G-01 - 94% Perc

Met Set: Burbank Met Set: Concord

op hrs/wk: 57 Acu Rate [g/s]: 0.1407 op hrs/wk: 57 Acu Rate [g/s]: 0.1407

Ann Rate [g/s]: 0.0494 Ann Rate [g/s]: 0.0494

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 162.66 47.41 20.18 0.2296 12417.79 0.0874 20 161.57 47.09 20.05 0.2280 12417.79 0.0874

30 86.38 25.18 10.72 0.1219 9254.67 0.0651 30 86.18 25.12 10.69 0.1216 9254.67 0.0651

40 53.51 15.60 6.64 0.0755 7114.91 0.0501 40 53.59 15.62 6.65 0.0756 7114.91 0.0501

50 36.43 10.62 4.52 0.0514 5625.45 0.0396 50 36.58 10.66 4.54 0.0516 5625.45 0.0396

60 26.41 7.70 3.28 0.0373 4555.43 0.0320 60 26.58 7.75 3.30 0.0375 4555.43 0.0320

80 15.71 4.58 1.95 0.0222 3163.52 0.0223 80 15.87 4.63 1.97 0.0224 3163.52 0.0223

100 10.41 3.03 1.29 0.0147 2329.1 0.0164 100 10.55 3.07 1.31 0.0149 2329.1 0.0164

150 4.86 1.42 0.60 0.0069 1281.78 0.0090 150 4.95 1.44 0.61 0.0070 1281.78 0.0090

200 2.81 0.82 0.35 0.0040 820.22 0.0058 200 2.86 0.83 0.35 0.0040 820.22 0.0058

250 1.83 0.53 0.23 0.0026 575.61 0.0040 250 1.87 0.55 0.23 0.0026 575.61 0.0040

500 0.48 0.14 0.06 0.0007 189.47 0.0013 500 0.49 0.14 0.06 0.0007 189.47 0.0013

1000 0.12 0.03 0.01 0.0002 64.58 0.0005 1000 0.14 0.04 0.02 0.0002 64.58 0.0005

Met Set: Fresno Met Set: LAX

op hrs/wk: 57 Acu Rate [g/s]: 0.1407 op hrs/wk: 57 Acu Rate [g/s]: 0.1407

Ann Rate [g/s]: 0.0494 Ann Rate [g/s]: 0.0494

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 130.29 37.97 16.16 0.1839 11155.5 0.0785 20 94.40 27.51 11.71 0.1332 8382.67 0.0590

30 68.87 20.07 8.54 0.0972 8402.65 0.0591 30 50.61 14.75 6.28 0.0714 5996.68 0.0422

40 42.46 12.38 5.27 0.0599 6521.95 0.0459 40 31.53 9.19 3.91 0.0445 4610.19 0.0324

50 28.78 8.39 3.57 0.0406 5186.31 0.0365 50 21.53 6.28 2.67 0.0304 3645.08 0.0256

60 20.79 6.06 2.58 0.0293 4214.74 0.0297 60 15.65 4.56 1.94 0.0221 2951.75 0.0208

80 12.29 3.58 1.52 0.0173 2937.5 0.0207 80 9.34 2.72 1.16 0.0132 2049.84 0.0144

100 8.11 2.36 1.01 0.0114 2165.55 0.0152 100 6.20 1.81 0.77 0.0088 1509.17 0.0106

150 3.76 1.10 0.47 0.0053 1191.61 0.0084 150 2.91 0.85 0.36 0.0041 953.49 0.0067

200 2.16 0.63 0.27 0.0030 761.38 0.0054 200 1.68 0.49 0.21 0.0024 744.04 0.0052

250 1.40 0.41 0.17 0.0020 533.41 0.0038 250 1.10 0.32 0.14 0.0016 611.79 0.0043

500 0.36 0.10 0.04 0.0005 174.25 0.0012 500 0.29 0.08 0.04 0.0004 331.07 0.0023

1000 0.09 0.03 0.01 0.0001 58.67 0.0004 1000 0.08 0.02 0.01 0.0001 181.35 0.0013

D-28
Facility G-01 - 94% Perc

(cont.)

Met Set: McClellan Met Set: Mather

op hrs/wk: 57 Acu Rate [g/s]: 0.1407 op hrs/wk: 57 Acu Rate [g/s]: 0.1407

Ann Rate [g/s]: 0.0494 Ann Rate [g/s]: 0.0494

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 101.05 29.45 12.54 0.1426 11007.62 0.0774 20 96.52 28.13 11.98 0.1362 8470.5 0.0596

30 53.37 15.56 6.62 0.0753 8490.17 0.0597 30 50.95 14.85 6.32 0.0719 5762.29 0.0405

40 32.93 9.60 4.09 0.0465 6665.94 0.0469 40 31.40 9.15 3.90 0.0443 4464.6 0.0314

50 22.34 6.51 2.77 0.0315 5343.61 0.0376 50 21.29 6.21 2.64 0.0300 3545.55 0.0249

60 16.15 4.71 2.00 0.0228 4368.46 0.0307 60 15.38 4.48 1.91 0.0217 2878.6 0.0203

80 9.57 2.79 1.19 0.0135 3069.77 0.0216 80 9.10 2.65 1.13 0.0128 2004.05 0.0141

100 6.32 1.84 0.78 0.0089 2275.44 0.0160 100 6.00 1.75 0.74 0.0085 1477.56 0.0104

150 2.93 0.85 0.36 0.0041 1262.34 0.0089 150 2.78 0.81 0.34 0.0039 819.7 0.0058

200 1.69 0.49 0.21 0.0024 810.41 0.0057 200 1.60 0.47 0.20 0.0023 527.32 0.0037

250 1.09 0.32 0.14 0.0015 569.61 0.0040 250 1.03 0.30 0.13 0.0015 371.22 0.0026

500 0.28 0.08 0.03 0.0004 187.81 0.0013 500 0.27 0.08 0.03 0.0004 122.78 0.0009

1000 0.07 0.02 0.01 0.0001 63.95 0.0004 1000 0.07 0.02 0.01 0.0001 41.91 0.0003

Met Set: Oakland Met Set: Redding

op hrs/wk: 57 Acu Rate [g/s]: 0.1407 op hrs/wk: 57 Acu Rate [g/s]: 0.1407

Ann Rate [g/s]: 0.0494 Ann Rate [g/s]: 0.0494

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 91.71 26.73 11.38 0.1294 10519.95 0.0740 20 112.58 32.81 13.97 0.1589 11399.88 0.0802

30 49.17 14.33 6.10 0.0694 8021.08 0.0564 30 59.73 17.41 7.41 0.0843 8620.94 0.0606

40 30.65 8.93 3.80 0.0433 6281.76 0.0442 40 36.97 10.78 4.59 0.0522 6686.72 0.0470

50 20.94 6.10 2.60 0.0296 5029.68 0.0354 50 25.14 7.33 3.12 0.0355 5317.3 0.0374

60 15.22 4.44 1.89 0.0215 4106.19 0.0289 60 18.21 5.31 2.26 0.0257 4322.64 0.0304

80 9.09 2.65 1.13 0.0128 2877.44 0.0202 80 10.81 3.15 1.34 0.0153 3016 0.0212

100 6.04 1.76 0.75 0.0085 2127.42 0.0150 100 7.16 2.09 0.89 0.0101 2226.16 0.0157

150 2.83 0.82 0.35 0.0040 1174.14 0.0083 150 3.33 0.97 0.41 0.0047 1228.45 0.0086

200 1.64 0.48 0.20 0.0023 750.86 0.0053 200 1.92 0.56 0.24 0.0027 789.26 0.0056

250 1.07 0.31 0.13 0.0015 526.14 0.0037 250 1.25 0.36 0.16 0.0018 555.62 0.0039

500 0.28 0.08 0.03 0.0004 171.69 0.0012 500 0.32 0.09 0.04 0.0005 183.77 0.0013

1000 0.07 0.02 0.01 0.0001 57.64 0.0004 1000 0.08 0.02 0.01 0.0001 62.72 0.0004

D-29
Facility G-01 - 94% Perc

(cont.)

Met Set: Sacramento Met Set: Anaheim

op hrs/wk: 57 Acu Rate [g/s]: 0.1407 op hrs/wk: 57 Acu Rate [g/s]: 0.1407

Ann Rate [g/s]: 0.0494 Ann Rate [g/s]: 0.0494

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 105.61 30.78 13.10 0.1491 11198.97 0.0788 20 219.02 63.84 27.17 0.3091 12413.44 0.0873

30 55.98 16.32 6.95 0.0790 8535.41 0.0600 30 115.95 33.79 14.39 0.1637 9249.49 0.0651

40 34.62 10.09 4.30 0.0489 6652.15 0.0468 40 71.59 20.87 8.88 0.1010 7109.62 0.0500

50 23.52 6.86 2.92 0.0332 5306.72 0.0373 50 48.59 14.16 6.03 0.0686 5620.4 0.0395

60 17.03 4.96 2.11 0.0240 4323.84 0.0304 60 35.13 10.24 4.36 0.0496 4550.74 0.0320

80 10.10 2.94 1.25 0.0143 3025.89 0.0213 80 20.81 6.07 2.58 0.0294 3159.6 0.0222

100 6.68 1.95 0.83 0.0094 2237.71 0.0157 100 13.75 4.01 1.71 0.0194 2325.83 0.0164

150 3.11 0.91 0.39 0.0044 1238.17 0.0087 150 6.38 1.86 0.79 0.0090 1279.62 0.0090

200 1.79 0.52 0.22 0.0025 794.14 0.0056 200 3.67 1.07 0.46 0.0052 818.68 0.0058

250 1.16 0.34 0.14 0.0016 557.98 0.0039 250 2.38 0.69 0.30 0.0034 574.45 0.0040

500 0.30 0.09 0.04 0.0004 184.01 0.0013 500 0.61 0.18 0.08 0.0009 189.33 0.0013

1000 0.08 0.02 0.01 0.0001 62.75 0.0004 1000 0.16 0.05 0.02 0.0002 64.55 0.0005

Met Set: Default - 0

op hrs/wk: 57 Acu Rate [g/s]: 0.1407

Ann Rate [g/s]: 0.0494

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 307.03 89.49 38.09 0.4334 11342.73 0.0798

30 229.98 67.03 28.53 0.3246 8496.33 0.0598

40 178.09 51.91 22.09 0.2514 6579.11 0.0463

50 141.80 41.33 17.59 0.2001 5238.72 0.0369

60 115.56 33.68 14.34 0.1631 4269.33 0.0300

80 81.09 23.64 10.06 0.1145 2995.85 0.0211

100 60.18 17.54 7.47 0.0849 2223.11 0.0156

150 33.55 9.78 4.16 0.0473 1239.31 0.0087

200 21.63 6.30 2.68 0.0305 799.09 0.0056

250 15.25 4.45 1.89 0.0215 563.57 0.0040

500 5.08 1.48 0.63 0.0072 187.51 0.0013

1000 1.74 0.51 0.22 0.0025 64.26 0.0005

D-30
Risk Assessment Summary - 3 Generic Facilities

Brake Cleaners

Facility G-02 - 65% Perc

Met Set: Burbank Met Set: Concord

op hrs/wk: 57 Acu Rate [g/s]: 0.1946 op hrs/wk: 57 Acu Rate [g/s]: 0.1946

Ann Rate [g/s]: 0.1024 Ann Rate [g/s]: 0.1024

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 97.87 59.13 25.17 0.2863 5528.38 0.0538 20 97.28 58.77 25.02 0.2846 5532.86 0.0538

30 71.96 43.48 18.51 0.2105 4845.41 0.0471 30 71.32 43.09 18.34 0.2087 4845.41 0.0471

40 46.45 28.06 11.95 0.1359 4048.28 0.0394 40 46.19 27.91 11.88 0.1351 4048.28 0.0394

50 32.37 19.56 8.32 0.0947 3418.07 0.0333 50 32.27 19.50 8.30 0.0944 3418.07 0.0333

60 23.83 14.40 6.13 0.0697 2918.05 0.0284 60 23.83 14.40 6.13 0.0697 2918.05 0.0284

80 14.48 8.75 3.72 0.0424 2193.5 0.0213 80 14.54 8.78 3.74 0.0425 2193.5 0.0213

100 9.73 5.88 2.50 0.0285 1708.42 0.0166 100 9.80 5.92 2.52 0.0287 1708.42 0.0166

150 4.64 2.80 1.19 0.0136 1026.4 0.0100 150 4.70 2.84 1.21 0.0138 1026.4 0.0100

200 2.71 1.64 0.70 0.0079 690.62 0.0067 200 2.75 1.66 0.71 0.0080 690.62 0.0067

250 1.77 1.07 0.46 0.0052 500.6 0.0049 250 1.81 1.09 0.47 0.0053 500.6 0.0049

500 0.47 0.28 0.12 0.0014 176.69 0.0017 500 0.48 0.29 0.12 0.0014 176.69 0.0017

1000 0.12 0.07 0.03 0.0004 62.47 0.0006 1000 0.14 0.08 0.04 0.0004 62.47 0.0006

Met Set: Fresno Met Set: LAX

op hrs/wk: 57 Acu Rate [g/s]: 0.1946 op hrs/wk: 57 Acu Rate [g/s]: 0.1946

Ann Rate [g/s]: 0.1024 Ann Rate [g/s]: 0.1024

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 72.47 43.78 18.64 0.2120 5150.55 0.0501 20 46.21 27.92 11.88 0.1352 4438.48 0.0432

30 57.46 34.72 14.78 0.1681 4329.74 0.0421 30 41.73 25.21 10.73 0.1221 3329.4 0.0324

40 37.02 22.37 9.52 0.1083 3636.07 0.0354 40 27.17 16.42 6.99 0.0795 2623.13 0.0255

50 25.71 15.53 6.61 0.0752 3085.18 0.0300 50 19.02 11.49 4.89 0.0556 2214.78 0.0215

60 18.87 11.40 4.85 0.0552 2652.23 0.0258 60 14.06 8.49 3.62 0.0411 1890.78 0.0184

80 11.40 6.89 2.93 0.0334 2011.93 0.0196 80 8.58 5.18 2.21 0.0251 1421.31 0.0138

100 7.62 4.60 1.96 0.0223 1575.29 0.0153 100 5.79 3.50 1.49 0.0169 1161.72 0.0113

150 3.60 2.17 0.93 0.0105 951.66 0.0093 150 2.77 1.67 0.71 0.0081 864.8 0.0084

200 2.09 1.26 0.54 0.0061 641.05 0.0062 200 1.62 0.98 0.42 0.0047 690.47 0.0067

250 1.36 0.82 0.35 0.0040 464.48 0.0045 250 1.07 0.65 0.28 0.0031 576.01 0.0056

500 0.35 0.21 0.09 0.0010 162.91 0.0016 500 0.29 0.18 0.07 0.0008 321.35 0.0031

1000 0.09 0.05 0.02 0.0003 56.88 0.0006 1000 0.08 0.05 0.02 0.0002 178.82 0.0017

D-31
Facility G-02 - 65% Perc

(cont.)

Met Set: McClellan Met Set: Mather

op hrs/wk: 57 Acu Rate [g/s]: 0.1946 op hrs/wk: 57 Acu Rate [g/s]: 0.1946

Ann Rate [g/s]: 0.1024 Ann Rate [g/s]: 0.1024

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 64.21 38.79 16.51 0.1879 4940.31 0.0481 20 57.90 34.98 14.89 0.1694 3794.23 0.0369

30 44.73 27.02 11.50 0.1309 4201.41 0.0409 30 42.67 25.78 10.97 0.1248 3373.6 0.0328

40 28.75 17.37 7.39 0.0841 3602.76 0.0351 40 27.44 16.58 7.06 0.0803 2579.42 0.0251

50 19.97 12.07 5.14 0.0584 3101.33 0.0302 50 19.05 11.51 4.90 0.0557 2118.71 0.0206

60 14.66 8.86 3.77 0.0429 2686.93 0.0261 60 13.97 8.44 3.59 0.0409 1819.33 0.0177

80 8.86 5.35 2.28 0.0259 2061.66 0.0201 80 8.44 5.10 2.17 0.0247 1377.52 0.0134

100 5.94 3.59 1.53 0.0174 1627.16 0.0158 100 5.64 3.41 1.45 0.0165 1077.14 0.0105

150 2.81 1.70 0.72 0.0082 995.28 0.0097 150 2.66 1.61 0.68 0.0078 649.65 0.0063

200 1.63 0.98 0.42 0.0048 675.35 0.0066 200 1.55 0.94 0.40 0.0045 438.54 0.0043

250 1.06 0.64 0.27 0.0031 491.77 0.0048 250 1.01 0.61 0.26 0.0030 319.33 0.0031

500 0.28 0.17 0.07 0.0008 174.75 0.0017 500 0.26 0.16 0.07 0.0008 113.98 0.0011

1000 0.07 0.04 0.02 0.0002 61.83 0.0006 1000 0.07 0.04 0.02 0.0002 40.48 0.0004

Met Set: Oakland Met Set: Redding

op hrs/wk: 57 Acu Rate [g/s]: 0.1946 op hrs/wk: 57 Acu Rate [g/s]: 0.1946

Ann Rate [g/s]: 0.1024 Ann Rate [g/s]: 0.1024

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 48.31 29.19 12.42 0.1413 4685.59 0.0456 20 68.47 41.37 17.61 0.2003 5262.77 0.0512

30 40.60 24.53 10.44 0.1188 4028.18 0.0392 30 49.83 30.11 12.82 0.1458 4405.79 0.0429

40 26.41 15.96 6.79 0.0773 3439.11 0.0335 40 32.16 19.43 8.27 0.0941 3722.07 0.0362

50 18.50 11.18 4.76 0.0541 2941.66 0.0286 50 22.38 13.52 5.76 0.0655 3168.63 0.0308

60 13.67 8.26 3.52 0.0400 2531.88 0.0246 60 16.46 9.94 4.23 0.0482 2722.05 0.0265

80 8.35 5.04 2.15 0.0244 1940.79 0.0189 80 9.99 6.04 2.57 0.0292 2063.9 0.0201

100 5.63 3.40 1.45 0.0165 1529.51 0.0149 100 6.70 4.05 1.72 0.0196 1616.3 0.0157

150 2.70 1.63 0.69 0.0079 931.7 0.0091 150 3.18 1.92 0.82 0.0093 978.01 0.0095

200 1.58 0.95 0.41 0.0046 629.79 0.0061 200 1.86 1.12 0.48 0.0054 660.08 0.0064

250 1.04 0.63 0.27 0.0030 457.07 0.0044 250 1.21 0.73 0.31 0.0035 479.17 0.0047

500 0.28 0.17 0.07 0.0008 160.49 0.0016 500 0.32 0.19 0.08 0.0009 170.6 0.0017

1000 0.07 0.04 0.02 0.0002 55.89 0.0005 1000 0.08 0.05 0.02 0.0002 60.59 0.0006

D-32
Facility G-02 - 65% Perc

(cont.)

Met Set: Sacramento Met Set: Anaheim

op hrs/wk: 57 Acu Rate [g/s]: 0.1946 op hrs/wk: 57 Acu Rate [g/s]: 0.1946

Ann Rate [g/s]: 0.1024 Ann Rate [g/s]: 0.1024

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 63.33 38.26 16.29 0.1853 5079.25 0.0494 20 125.69 75.94 32.32 0.3677 5444.38 0.0530

30 46.73 28.23 12.02 0.1367 4307.48 0.0419 30 96.66 58.40 24.86 0.2828 4844.11 0.0471

40 30.14 18.21 7.75 0.0882 3660.84 0.0356 40 62.33 37.66 16.03 0.1824 4046.7 0.0394

50 20.96 12.66 5.39 0.0613 3130.22 0.0305 50 43.33 26.18 11.14 0.1268 3416.34 0.0332

60 15.41 9.31 3.96 0.0451 2698.02 0.0263 60 31.84 19.24 8.19 0.0932 2916.25 0.0284

80 9.34 5.64 2.40 0.0273 2055.28 0.0200 80 19.26 11.64 4.95 0.0563 2191.72 0.0213

100 6.27 3.79 1.61 0.0183 1614.56 0.0157 100 12.90 7.79 3.32 0.0377 1706.75 0.0166

150 2.97 1.79 0.76 0.0087 981.41 0.0095 150 6.11 3.69 1.57 0.0179 1025.07 0.0100

200 1.73 1.05 0.44 0.0051 664.04 0.0065 200 3.55 2.14 0.91 0.0104 689.56 0.0067

250 1.13 0.68 0.29 0.0033 482.83 0.0047 250 2.32 1.40 0.60 0.0068 499.75 0.0049

500 0.30 0.18 0.08 0.0009 171.3 0.0017 500 0.60 0.36 0.15 0.0018 176.33 0.0017

1000 0.08 0.05 0.02 0.0002 60.66 0.0006 1000 0.16 0.10 0.04 0.0005 62.42 0.0006

Met Set: Default - 0

op hrs/wk: 57 Acu Rate [g/s]: 0.1946

Ann Rate [g/s]: 0.1024

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 142.83 86.29 36.73 0.4179 5276.51 0.0513

30 117.98 71.28 30.34 0.3452 4358.64 0.0424

40 98.78 59.68 25.40 0.2890 3649.09 0.0355

50 83.77 50.61 21.54 0.2451 3094.79 0.0301

60 71.89 43.44 18.49 0.2103 2656.01 0.0258

80 54.62 33.00 14.05 0.1598 2017.70 0.0196

100 42.94 25.94 11.04 0.1256 1586.22 0.0154

150 26.25 15.86 6.75 0.0768 969.72 0.0094

200 17.86 10.79 4.59 0.0523 659.99 0.0064

250 13.05 7.89 3.36 0.0382 482.19 0.0047

500 4.69 2.83 1.21 0.0137 173.33 0.0017

1000 1.68 1.01 0.43 0.0049 61.90 0.0006

D-33
Risk Assessment Summary - 3 Generic Facilities

Brake Cleaners

Facility G-02 - 94% Perc

Met Set: Burbank Met Set: Concord

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0.2815

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0.1481

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 97.87 85.52 36.40 0.4141 5528.38 0.0778 20 97.28 85.00 36.18 0.4116 5532.86 0.0779

30 71.96 62.88 26.77 0.3045 4845.41 0.0682 30 71.32 62.32 26.53 0.3018 4845.41 0.0682

40 46.45 40.59 17.28 0.1965 4048.28 0.0570 40 46.19 40.36 17.18 0.1954 4048.28 0.0570

50 32.37 28.28 12.04 0.1370 3418.07 0.0481 50 32.27 28.20 12.00 0.1365 3418.07 0.0481

60 23.83 20.82 8.86 0.1008 2918.05 0.0411 60 23.83 20.82 8.86 0.1008 2918.05 0.0411

80 14.48 12.65 5.39 0.0613 2193.5 0.0309 80 14.54 12.70 5.41 0.0615 2193.5 0.0309

100 9.73 8.50 3.62 0.0412 1708.42 0.0240 100 9.80 8.56 3.65 0.0415 1708.42 0.0240

150 4.64 4.05 1.73 0.0196 1026.4 0.0144 150 4.70 4.11 1.75 0.0199 1026.4 0.0144

200 2.71 2.37 1.01 0.0115 690.62 0.0097 200 2.75 2.40 1.02 0.0116 690.62 0.0097

250 1.77 1.55 0.66 0.0075 500.6 0.0070 250 1.81 1.58 0.67 0.0077 500.6 0.0070

500 0.47 0.41 0.17 0.0020 176.69 0.0025 500 0.48 0.42 0.18 0.0020 176.69 0.0025

1000 0.12 0.10 0.04 0.0005 62.47 0.0009 1000 0.14 0.12 0.05 0.0006 62.47 0.0009

Met Set: Fresno Met Set: LAX

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0.2815

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0.1481

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 72.47 63.32 26.96 0.3067 5150.55 0.0725 20 46.21 40.38 17.19 0.1955 4438.48 0.0625

30 57.46 50.21 21.37 0.2431 4329.74 0.0609 30 41.73 36.46 15.52 0.1766 3329.4 0.0469

40 37.02 32.35 13.77 0.1566 3636.07 0.0512 40 27.17 23.74 10.11 0.1150 2623.13 0.0369

50 25.71 22.47 9.56 0.1088 3085.18 0.0434 50 19.02 16.62 7.07 0.0805 2214.78 0.0312

60 18.87 16.49 7.02 0.0798 2652.23 0.0373 60 14.06 12.29 5.23 0.0595 1890.78 0.0266

80 11.40 9.96 4.24 0.0482 2011.93 0.0283 80 8.58 7.50 3.19 0.0363 1421.31 0.0200

100 7.62 6.66 2.83 0.0322 1575.29 0.0222 100 5.79 5.06 2.15 0.0245 1161.72 0.0164

150 3.60 3.15 1.34 0.0152 951.66 0.0134 150 2.77 2.42 1.03 0.0117 864.8 0.0122

200 2.09 1.83 0.78 0.0088 641.05 0.0090 200 1.62 1.42 0.60 0.0069 690.47 0.0097

250 1.36 1.19 0.51 0.0058 464.48 0.0065 250 1.07 0.93 0.40 0.0045 576.01 0.0081

500 0.35 0.31 0.13 0.0015 162.91 0.0023 500 0.29 0.25 0.11 0.0012 321.35 0.0045

1000 0.09 0.08 0.03 0.0004 56.88 0.0008 1000 0.08 0.07 0.03 0.0003 178.82 0.0025

D-34
Facility G-02 - 94% Perc

(cont.)

Met Set: McClellan Met Set: Mather

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0.2815

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0.1481

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 64.21 56.11 23.88 0.2717 4940.31 0.0695 20 57.90 50.59 21.54 0.2450 3794.23 0.0534

30 44.73 39.08 16.64 0.1893 4201.41 0.0591 30 42.67 37.28 15.87 0.1806 3373.6 0.0475

40 28.75 25.12 10.69 0.1217 3602.76 0.0507 40 27.44 23.98 10.21 0.1161 2579.42 0.0363

50 19.97 17.45 7.43 0.0845 3101.33 0.0437 50 19.05 16.65 7.09 0.0806 2118.71 0.0298

60 14.66 12.81 5.45 0.0620 2686.93 0.0378 60 13.97 12.21 5.20 0.0591 1819.33 0.0256

80 8.86 7.74 3.30 0.0375 2061.66 0.0290 80 8.44 7.37 3.14 0.0357 1377.52 0.0194

100 5.94 5.19 2.21 0.0251 1627.16 0.0229 100 5.64 4.93 2.10 0.0239 1077.14 0.0152

150 2.81 2.46 1.05 0.0119 995.28 0.0140 150 2.66 2.32 0.99 0.0113 649.65 0.0091

200 1.63 1.42 0.61 0.0069 675.35 0.0095 200 1.55 1.35 0.58 0.0066 438.54 0.0062

250 1.06 0.93 0.39 0.0045 491.77 0.0069 250 1.01 0.88 0.38 0.0043 319.33 0.0045

500 0.28 0.24 0.10 0.0012 174.75 0.0025 500 0.26 0.23 0.10 0.0011 113.98 0.0016

1000 0.07 0.06 0.03 0.0003 61.83 0.0009 1000 0.07 0.06 0.03 0.0003 40.48 0.0006

Met Set: Oakland Met Set: Redding

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0.2815

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0.1481

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 48.31 42.21 17.97 0.2044 4685.59 0.0659 20 68.47 59.83 25.47 0.2897 5262.77 0.0741

30 40.60 35.48 15.10 0.1718 4028.18 0.0567 30 49.83 43.54 18.53 0.2109 4405.79 0.0620

40 26.41 23.08 9.82 0.1118 3439.11 0.0484 40 32.16 28.10 11.96 0.1361 3722.07 0.0524

50 18.50 16.17 6.88 0.0783 2941.66 0.0414 50 22.38 19.56 8.32 0.0947 3168.63 0.0446

60 13.67 11.94 5.08 0.0578 2531.88 0.0356 60 16.46 14.38 6.12 0.0696 2722.05 0.0383

80 8.35 7.30 3.11 0.0353 1940.79 0.0273 80 9.99 8.73 3.72 0.0423 2063.9 0.0290

100 5.63 4.92 2.09 0.0238 1529.51 0.0215 100 6.70 5.85 2.49 0.0284 1616.3 0.0227

150 2.70 2.36 1.00 0.0114 931.7 0.0131 150 3.18 2.78 1.18 0.0135 978.01 0.0138

200 1.58 1.38 0.59 0.0067 629.79 0.0089 200 1.86 1.63 0.69 0.0079 660.08 0.0093

250 1.04 0.91 0.39 0.0044 457.07 0.0064 250 1.21 1.06 0.45 0.0051 479.17 0.0067

500 0.28 0.24 0.10 0.0012 160.49 0.0023 500 0.32 0.28 0.12 0.0014 170.6 0.0024

1000 0.07 0.06 0.03 0.0003 55.89 0.0008 1000 0.08 0.07 0.03 0.0003 60.59 0.0009

D-35
Facility G-02 - 94% Perc

(cont.)

Met Set: Sacramento Met Set: Anaheim

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0.2815

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0.1481

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 63.33 55.34 23.56 0.2680 5079.25 0.0715 20 125.69 109.83 46.75 0.5318 5444.38 0.0766

30 46.73 40.83 17.38 0.1977 4307.48 0.0606 30 96.66 84.46 35.95 0.4090 4844.11 0.0682

40 30.14 26.34 11.21 0.1275 3660.84 0.0515 40 62.33 54.46 23.18 0.2637 4046.7 0.0570

50 20.96 18.31 7.80 0.0887 3130.22 0.0441 50 43.33 37.86 16.12 0.1833 3416.34 0.0481

60 15.41 13.47 5.73 0.0652 2698.02 0.0380 60 31.84 27.82 11.84 0.1347 2916.25 0.0410

80 9.34 8.16 3.47 0.0395 2055.28 0.0289 80 19.26 16.83 7.16 0.0815 2191.72 0.0308

100 6.27 5.48 2.33 0.0265 1614.56 0.0227 100 12.90 11.27 4.80 0.0546 1706.75 0.0240

150 2.97 2.60 1.10 0.0126 981.41 0.0138 150 6.11 5.34 2.27 0.0259 1025.07 0.0144

200 1.73 1.51 0.64 0.0073 664.04 0.0093 200 3.55 3.10 1.32 0.0150 689.56 0.0097

250 1.13 0.99 0.42 0.0048 482.83 0.0068 250 2.32 2.03 0.86 0.0098 499.75 0.0070

500 0.30 0.26 0.11 0.0013 171.3 0.0024 500 0.60 0.52 0.22 0.0025 176.33 0.0025

1000 0.08 0.07 0.03 0.0003 60.66 0.0009 1000 0.16 0.14 0.06 0.0007 62.42 0.0009

Met Set: Default - 0

op hrs/wk: 57 Acu Rate [g/s]: 0.2815

Ann Rate [g/s]: 0.1481

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 142.83 124.80 53.13 0.6044 5276.51 0.0743

30 117.98 103.09 43.88 0.4992 4358.64 0.0613

40 98.78 86.31 36.74 0.4180 3649.09 0.0514

50 83.77 73.20 31.16 0.3545 3094.79 0.0436

60 71.89 62.82 26.74 0.3042 2656.01 0.0374

80 54.62 47.72 20.31 0.2311 2017.70 0.0284

100 42.94 37.52 15.97 0.1817 1586.22 0.0223

150 26.25 22.94 9.76 0.1111 969.72 0.0136

200 17.86 15.61 6.64 0.0756 659.99 0.0093

250 13.05 11.40 4.85 0.0552 482.19 0.0068

500 4.69 4.10 1.75 0.0199 173.33 0.0024

1000 1.68 1.46 0.62 0.0071 61.90 0.0009

D-36
Risk Assessment Summary - 3 Generic Facilities

Brake Cleaners

Facility G-03 - 65% Perc

Met Set: Burbank Met Set: Concord

op hrs/wk: 57 Acu Rate [g/s]: 0.1946 op hrs/wk: 57 Acu Rate [g/s]: 0.1946

Ann Rate [g/s]: 0.1024 Ann Rate [g/s]: 0.1024

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 17.91 10.82 4.61 0.0524 1344.25 0.0131 20 18.28 11.04 4.70 0.0535 1344.83 0.0131

30 42.20 25.50 10.85 0.1235 1964.95 0.0191 30 41.78 25.24 10.74 0.1222 1964.95 0.0191

40 35.87 21.67 9.22 0.1049 1702.1 0.0166 40 35.45 21.42 9.12 0.1037 1702.1 0.0166

50 33.01 19.94 8.49 0.0966 2640.9 0.0257 50 32.92 19.89 8.47 0.0963 2643.95 0.0257

60 26.91 16.26 6.92 0.0787 2498.24 0.0243 60 26.78 16.18 6.89 0.0784 2498.24 0.0243

80 15.68 9.47 4.03 0.0459 1915.64 0.0186 80 15.70 9.49 4.04 0.0459 1915.64 0.0186

100 10.28 6.21 2.64 0.0301 1511.07 0.0147 100 10.33 6.24 2.66 0.0302 1511.07 0.0147

150 4.76 2.88 1.22 0.0139 927.46 0.0090 150 4.82 2.91 1.24 0.0141 927.46 0.0090

200 2.75 1.66 0.71 0.0080 633.44 0.0062 200 2.79 1.69 0.72 0.0082 633.44 0.0062

250 1.79 1.08 0.46 0.0052 464.37 0.0045 250 1.83 1.11 0.47 0.0054 464.37 0.0045

500 0.47 0.28 0.12 0.0014 169 0.0016 500 0.48 0.29 0.12 0.0014 169 0.0016

1000 0.12 0.07 0.03 0.0004 61 0.0006 1000 0.14 0.08 0.04 0.0004 61 0.0006

Met Set: Fresno Met Set: LAX

op hrs/wk: 57 Acu Rate [g/s]: 0.1946 op hrs/wk: 57 Acu Rate [g/s]: 0.1946

Ann Rate [g/s]: 0.1024 Ann Rate [g/s]: 0.1024

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 20.09 12.14 5.17 0.0588 1266.24 0.0123 20 18.48 11.16 4.75 0.0541 993.39 0.0097

30 34.50 20.84 8.87 0.1009 1668.13 0.0162 30 25.65 15.50 6.60 0.0750 1273.21 0.0124

40 26.10 15.77 6.71 0.0764 1472.59 0.0143 40 17.83 10.77 4.59 0.0522 1102.9 0.0107

50 24.31 14.69 6.25 0.0711 1934.45 0.0188 50 16.29 9.84 4.19 0.0477 1712.71 0.0167

60 20.92 12.64 5.38 0.0612 1746.52 0.0170 60 15.31 9.25 3.94 0.0448 1618.76 0.0158

80 12.26 7.41 3.15 0.0359 1403.39 0.0137 80 9.15 5.53 2.35 0.0268 1241.26 0.0121

100 8.02 4.85 2.06 0.0235 1167.81 0.0114 100 6.06 3.66 1.56 0.0177 979.11 0.0095

150 3.69 2.23 0.95 0.0108 760.67 0.0074 150 2.84 1.72 0.73 0.0083 728.7 0.0071

200 2.12 1.28 0.55 0.0062 527.81 0.0051 200 1.65 1.00 0.42 0.0048 601.14 0.0058

250 1.37 0.83 0.35 0.0040 395.54 0.0038 250 1.08 0.65 0.28 0.0032 517.17 0.0050

500 0.35 0.21 0.09 0.0010 151.49 0.0015 500 0.29 0.18 0.07 0.0008 306.22 0.0030

1000 0.09 0.05 0.02 0.0003 55.11 0.0005 1000 0.08 0.05 0.02 0.0002 175.03 0.0017

D-37
Facility G-03 - 65% Perc

(cont.)

Met Set: McClellan Met Set: Mather

op hrs/wk: 57 Acu Rate [g/s]: 0.1946 op hrs/wk: 57 Acu Rate [g/s]: 0.1946

Ann Rate [g/s]: 0.1024 Ann Rate [g/s]: 0.1024

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 8.95 5.41 2.30 0.0262 1324.96 0.0129 20 11.46 6.92 2.95 0.0335 958.09 0.0093

30 25.93 15.67 6.67 0.0759 1554.15 0.0151 30 25.06 15.14 6.44 0.0733 1290.22 0.0126

40 23.06 13.93 5.93 0.0675 1492.44 0.0145 40 20.77 12.55 5.34 0.0608 1240.56 0.0121

50 21.36 12.90 5.49 0.0625 1764.81 0.0172 50 19.28 11.65 4.96 0.0564 1734.69 0.0169

60 16.75 10.12 4.31 0.0490 1581.78 0.0154 60 15.76 9.52 4.05 0.0461 1546.97 0.0151

80 9.65 5.83 2.48 0.0282 1214.97 0.0118 80 9.15 5.53 2.35 0.0268 1057.88 0.0103

100 6.29 3.80 1.62 0.0184 1033.69 0.0101 100 5.97 3.61 1.54 0.0175 790.98 0.0077

150 2.89 1.75 0.74 0.0085 699.04 0.0068 150 2.74 1.66 0.70 0.0080 526.98 0.0051

200 1.66 1.00 0.43 0.0049 517.13 0.0050 200 1.57 0.95 0.40 0.0046 374.12 0.0036

250 1.08 0.65 0.28 0.0032 398.9 0.0039 250 1.02 0.62 0.26 0.0030 280.03 0.0027

500 0.28 0.17 0.07 0.0008 159.29 0.0015 500 0.26 0.16 0.07 0.0008 105.06 0.0010

1000 0.07 0.04 0.02 0.0002 59.42 0.0006 1000 0.07 0.04 0.02 0.0002 38.59 0.0004

Met Set: Oakland Met Set: Redding

op hrs/wk: 57 Acu Rate [g/s]: 0.1946 op hrs/wk: 57 Acu Rate [g/s]: 0.1946

Ann Rate [g/s]: 0.1024 Ann Rate [g/s]: 0.1024

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 15.58 9.41 4.01 0.0456 1242.49 0.0121 20 11.91 7.20 3.06 0.0348 1203.97 0.0117

30 24.65 14.89 6.34 0.0721 1456.6 0.0142 30 29.23 17.66 7.52 0.0855 1727.12 0.0168

40 18.32 11.07 4.71 0.0536 1455.87 0.0142 40 25.02 15.12 6.43 0.0732 1517.85 0.0148

50 16.79 10.14 4.32 0.0491 1716.38 0.0167 50 23.12 13.97 5.95 0.0676 2116.06 0.0206

60 15.06 9.10 3.87 0.0441 1622.23 0.0158 60 18.67 11.28 4.80 0.0546 1858.14 0.0181

80 8.95 5.41 2.30 0.0262 1243.92 0.0121 80 10.84 6.55 2.79 0.0317 1510.93 0.0147

100 5.91 3.57 1.52 0.0173 981.21 0.0095 100 7.09 4.28 1.82 0.0207 1227.09 0.0119

150 2.76 1.67 0.71 0.0081 669.93 0.0065 150 3.27 1.98 0.84 0.0096 776.75 0.0076

200 1.60 0.97 0.41 0.0047 487.14 0.0047 200 1.88 1.14 0.48 0.0055 553.96 0.0054

250 1.05 0.63 0.27 0.0031 367.88 0.0036 250 1.23 0.74 0.32 0.0036 416.48 0.0041

500 0.28 0.17 0.07 0.0008 145.98 0.0014 500 0.32 0.19 0.08 0.0009 158.33 0.0015

1000 0.07 0.04 0.02 0.0002 53.8 0.0005 1000 0.08 0.05 0.02 0.0002 57.91 0.0006

D-38
Facility G-03 - 65% Perc

(cont.)

Met Set: Sacramento Met Set: Anaheim

op hrs/wk: 57 Acu Rate [g/s]: 0.1946 op hrs/wk: 57 Acu Rate [g/s]: 0.1946

Ann Rate [g/s]: 0.1024 Ann Rate [g/s]: 0.1024

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 12.95 7.82 3.33 0.0379 1295.57 0.0126 20 31.15 18.82 8.01 0.0911 1343.62 0.0131

30 27.76 16.77 7.14 0.0812 1644.39 0.0160 30 57.73 34.88 14.85 0.1689 1964.47 0.0191

40 22.81 13.78 5.87 0.0667 1452.28 0.0141 40 44.96 27.16 11.56 0.1315 1701.54 0.0166

50 21.26 12.84 5.47 0.0622 1884.88 0.0183 50 41.98 25.36 10.80 0.1228 2643.73 0.0257

60 17.37 10.49 4.47 0.0508 1690.83 0.0165 60 35.48 21.44 9.12 0.1038 2497.42 0.0243

80 10.12 6.11 2.60 0.0296 1379.12 0.0134 80 20.76 12.54 5.34 0.0607 1914.71 0.0186

100 6.62 4.00 1.70 0.0194 1135.35 0.0110 100 13.59 8.21 3.50 0.0398 1510.1 0.0147

150 3.05 1.84 0.78 0.0089 749.73 0.0073 150 6.26 3.78 1.61 0.0183 926.57 0.0090

200 1.76 1.06 0.45 0.0051 542.55 0.0053 200 3.60 2.17 0.93 0.0105 632.67 0.0062

250 1.14 0.69 0.29 0.0033 411.47 0.0040 250 2.34 1.41 0.60 0.0068 463.72 0.0045

500 0.30 0.18 0.08 0.0009 159.01 0.0015 500 0.61 0.37 0.16 0.0018 168.65 0.0016

1000 0.08 0.05 0.02 0.0002 58.65 0.0006 1000 0.16 0.10 0.04 0.0005 60.83 0.0006

Met Set: Default - 0

op hrs/wk: 57 Acu Rate [g/s]: 0.1946

Ann Rate [g/s]: 0.1024

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.30 44.89 19.11 0.2174 2744.96 0.0267

30 64.57 39.01 16.61 0.1889 2385.45 0.0232

40 56.52 34.15 14.54 0.1654 2088.05 0.0203

50 49.84 30.11 12.82 0.1458 1841.40 0.0179

60 44.27 26.75 11.39 0.1295 1635.59 0.0159

80 35.62 21.52 9.16 0.1042 1315.96 0.0128

100 29.32 17.71 7.54 0.0858 1083.10 0.0105

150 19.45 11.75 5.00 0.0569 718.69 0.0070

200 13.97 8.44 3.59 0.0409 516.25 0.0050

250 10.61 6.41 2.73 0.0310 391.81 0.0038

500 4.18 2.53 1.08 0.0122 154.56 0.0015

1000 1.58 0.96 0.41 0.0046 58.40 0.0006

D-39
Risk Assessment Summary - 3 Generic Facilities

Brake Cleaners

Facility G-03 - 94% Perc

Met Set: Burbank Met Set: Concord

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0.2815

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0.1481

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 17.91 15.65 6.66 0.0758 1344.25 0.0189 20 18.28 15.97 6.80 0.0774 1344.83 0.0189

30 42.20 36.87 15.70 0.1786 1964.95 0.0277 30 41.78 36.51 15.54 0.1768 1964.95 0.0277

40 35.87 31.34 13.34 0.1518 1702.1 0.0240 40 35.45 30.98 13.19 0.1500 1702.1 0.0240

50 33.01 28.84 12.28 0.1397 2640.9 0.0372 50 32.92 28.77 12.24 0.1393 2643.95 0.0372

60 26.91 23.51 10.01 0.1139 2498.24 0.0352 60 26.78 23.40 9.96 0.1133 2498.24 0.0352

80 15.68 13.70 5.83 0.0663 1915.64 0.0270 80 15.70 13.72 5.84 0.0664 1915.64 0.0270

100 10.28 8.98 3.82 0.0435 1511.07 0.0213 100 10.33 9.03 3.84 0.0437 1511.07 0.0213

150 4.76 4.16 1.77 0.0201 927.46 0.0131 150 4.82 4.21 1.79 0.0204 927.46 0.0131

200 2.75 2.40 1.02 0.0116 633.44 0.0089 200 2.79 2.44 1.04 0.0118 633.44 0.0089

250 1.79 1.56 0.67 0.0076 464.37 0.0065 250 1.83 1.60 0.68 0.0077 464.37 0.0065

500 0.47 0.41 0.17 0.0020 169 0.0024 500 0.48 0.42 0.18 0.0020 169 0.0024

1000 0.12 0.10 0.04 0.0005 61 0.0009 1000 0.14 0.12 0.05 0.0006 61 0.0009

Met Set: Fresno Met Set: LAX

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0.2815

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0.1481

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 20.09 17.55 7.47 0.0850 1266.24 0.0178 20 18.48 16.15 6.87 0.0782 993.39 0.0140

30 34.50 30.15 12.83 0.1460 1668.13 0.0235 30 25.65 22.41 9.54 0.1085 1273.21 0.0179

40 26.10 22.81 9.71 0.1104 1472.59 0.0207 40 17.83 15.58 6.63 0.0754 1102.9 0.0155

50 24.31 21.24 9.04 0.1029 1934.45 0.0272 50 16.29 14.23 6.06 0.0689 1712.71 0.0241

60 20.92 18.28 7.78 0.0885 1746.52 0.0246 60 15.31 13.38 5.69 0.0648 1618.76 0.0228

80 12.26 10.71 4.56 0.0519 1403.39 0.0198 80 9.15 8.00 3.40 0.0387 1241.26 0.0175

100 8.02 7.01 2.98 0.0339 1167.81 0.0164 100 6.06 5.30 2.25 0.0256 979.11 0.0138

150 3.69 3.22 1.37 0.0156 760.67 0.0107 150 2.84 2.48 1.06 0.0120 728.7 0.0103

200 2.12 1.85 0.79 0.0090 527.81 0.0074 200 1.65 1.44 0.61 0.0070 601.14 0.0085

250 1.37 1.20 0.51 0.0058 395.54 0.0056 250 1.08 0.94 0.40 0.0046 517.17 0.0073

500 0.35 0.31 0.13 0.0015 151.49 0.0021 500 0.29 0.25 0.11 0.0012 306.22 0.0043

1000 0.09 0.08 0.03 0.0004 55.11 0.0008 1000 0.08 0.07 0.03 0.0003 175.03 0.0025

D-40
Facility G-03 - 94% Perc

(cont.)

Met Set: McClellan Met Set: Mather

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0.2815

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0.1481

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 8.95 7.82 3.33 0.0379 1324.96 0.0186 20 11.46 10.01 4.26 0.0485 958.09 0.0135

30 25.93 22.66 9.64 0.1097 1554.15 0.0219 30 25.06 21.90 9.32 0.1060 1290.22 0.0182

40 23.06 20.15 8.58 0.0976 1492.44 0.0210 40 20.77 18.15 7.73 0.0879 1240.56 0.0175

50 21.36 18.66 7.94 0.0904 1764.81 0.0248 50 19.28 16.85 7.17 0.0816 1734.69 0.0244

60 16.75 14.64 6.23 0.0709 1581.78 0.0223 60 15.76 13.77 5.86 0.0667 1546.97 0.0218

80 9.65 8.43 3.59 0.0408 1214.97 0.0171 80 9.15 8.00 3.40 0.0387 1057.88 0.0149

100 6.29 5.50 2.34 0.0266 1033.69 0.0145 100 5.97 5.22 2.22 0.0253 790.98 0.0111

150 2.89 2.53 1.07 0.0122 699.04 0.0098 150 2.74 2.39 1.02 0.0116 526.98 0.0074

200 1.66 1.45 0.62 0.0070 517.13 0.0073 200 1.57 1.37 0.58 0.0066 374.12 0.0053

250 1.08 0.94 0.40 0.0046 398.9 0.0056 250 1.02 0.89 0.38 0.0043 280.03 0.0039

500 0.28 0.24 0.10 0.0012 159.29 0.0022 500 0.26 0.23 0.10 0.0011 105.06 0.0015

1000 0.07 0.06 0.03 0.0003 59.42 0.0008 1000 0.07 0.06 0.03 0.0003 38.59 0.0005

Met Set: Oakland Met Set: Redding

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0.2815

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0.1481

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 15.58 13.61 5.80 0.0659 1242.49 0.0175 20 11.91 10.41 4.43 0.0504 1203.97 0.0169

30 24.65 21.54 9.17 0.1043 1456.6 0.0205 30 29.23 25.54 10.87 0.1237 1727.12 0.0243

40 18.32 16.01 6.81 0.0775 1455.87 0.0205 40 25.02 21.86 9.31 0.1059 1517.85 0.0214

50 16.79 14.67 6.25 0.0710 1716.38 0.0242 50 23.12 20.20 8.60 0.0978 2116.06 0.0298

60 15.06 13.16 5.60 0.0637 1622.23 0.0228 60 18.67 16.31 6.94 0.0790 1858.14 0.0262

80 8.95 7.82 3.33 0.0379 1243.92 0.0175 80 10.84 9.47 4.03 0.0459 1510.93 0.0213

100 5.91 5.16 2.20 0.0250 981.21 0.0138 100 7.09 6.20 2.64 0.0300 1227.09 0.0173

150 2.76 2.41 1.03 0.0117 669.93 0.0094 150 3.27 2.86 1.22 0.0138 776.75 0.0109

200 1.60 1.40 0.60 0.0068 487.14 0.0069 200 1.88 1.64 0.70 0.0080 553.96 0.0078

250 1.05 0.92 0.39 0.0044 367.88 0.0052 250 1.23 1.07 0.46 0.0052 416.48 0.0059

500 0.28 0.24 0.10 0.0012 145.98 0.0021 500 0.32 0.28 0.12 0.0014 158.33 0.0022

1000 0.07 0.06 0.03 0.0003 53.8 0.0008 1000 0.08 0.07 0.03 0.0003 57.91 0.0008

D-41
Facility G-03 - 94% Perc

(cont.)

Met Set: Sacramento Met Set: Anaheim

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0.2815

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0.1481

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 12.95 11.32 4.82 0.0548 1295.57 0.0182 20 31.15 27.22 11.59 0.1318 1343.62 0.0189

30 27.76 24.26 10.33 0.1175 1644.39 0.0231 30 57.73 50.44 21.47 0.2443 1964.47 0.0276

40 22.81 19.93 8.48 0.0965 1452.28 0.0204 40 44.96 39.29 16.72 0.1902 1701.54 0.0239

50 21.26 18.58 7.91 0.0900 1884.88 0.0265 50 41.98 36.68 15.61 0.1776 2643.73 0.0372

60 17.37 15.18 6.46 0.0735 1690.83 0.0238 60 35.48 31.00 13.20 0.1501 2497.42 0.0352

80 10.12 8.84 3.76 0.0428 1379.12 0.0194 80 20.76 18.14 7.72 0.0878 1914.71 0.0269

100 6.62 5.78 2.46 0.0280 1135.35 0.0160 100 13.59 11.87 5.05 0.0575 1510.1 0.0213

150 3.05 2.67 1.13 0.0129 749.73 0.0106 150 6.26 5.47 2.33 0.0265 926.57 0.0130

200 1.76 1.54 0.65 0.0074 542.55 0.0076 200 3.60 3.15 1.34 0.0152 632.67 0.0089

250 1.14 1.00 0.42 0.0048 411.47 0.0058 250 2.34 2.04 0.87 0.0099 463.72 0.0065

500 0.30 0.26 0.11 0.0013 159.01 0.0022 500 0.61 0.53 0.23 0.0026 168.65 0.0024

1000 0.08 0.07 0.03 0.0003 58.65 0.0008 1000 0.16 0.14 0.06 0.0007 60.83 0.0009

Met Set: Default - 0

op hrs/wk: 57 Acu Rate [g/s]: 0.2815

Ann Rate [g/s]: 0.1481

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.30 64.92 27.64 0.3144 2744.96 0.0386

30 64.57 56.42 24.02 0.2732 2385.45 0.0336

40 56.52 49.39 21.02 0.2392 2088.05 0.0294

50 49.84 43.55 18.54 0.2109 1841.40 0.0259

60 44.27 38.69 16.47 0.1873 1635.59 0.0230

80 35.62 31.13 13.25 0.1507 1315.96 0.0185

100 29.32 25.62 10.90 0.1241 1083.10 0.0152

150 19.45 17.00 7.24 0.0823 718.69 0.0101

200 13.97 12.21 5.20 0.0591 516.25 0.0073

250 10.61 9.27 3.94 0.0449 391.81 0.0055

500 4.18 3.66 1.56 0.0177 154.56 0.0022

1000 1.58 1.38 0.59 0.0067 58.40 0.0008

D-42
Risk Assessment Summary - 3 Generic Facilities

Multicomponent Impacts - Brake Cleaners - Chronic/Cancer

Facility G-01 - 94% Perc

Met Set: Burbank

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1407 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0494 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 162.66 47.41 20.18 0.2296 12417.79 0.0874 20 162.66 0.00 0.00 0.0000 12417.79 0.0000

30 86.38 25.18 10.72 0.1219 9254.67 0.0651 30 86.38 0.00 0.00 0.0000 9254.67 0.0000

40 53.51 15.60 6.64 0.0755 7114.91 0.0501 40 53.51 0.00 0.00 0.0000 7114.91 0.0000

50 36.43 10.62 4.52 0.0514 5625.45 0.0396 50 36.43 0.00 0.00 0.0000 5625.45 0.0000

60 26.41 7.70 3.28 0.0373 4555.43 0.0320 60 26.41 0.00 0.00 0.0000 4555.43 0.0000

80 15.71 4.58 1.95 0.0222 3163.52 0.0223 80 15.71 0.00 0.00 0.0000 3163.52 0.0000

100 10.41 3.03 1.29 0.0147 2329.10 0.0164 100 10.41 0.00 0.00 0.0000 2329.10 0.0000

150 4.86 1.42 0.60 0.0069 1281.78 0.0090 150 4.86 0.00 0.00 0.0000 1281.78 0.0000

200 2.81 0.82 0.35 0.0040 820.22 0.0058 200 2.81 0.00 0.00 0.0000 820.22 0.0000

250 1.83 0.53 0.23 0.0026 575.61 0.0040 250 1.83 0.00 0.00 0.0000 575.61 0.0000

500 0.48 0.14 0.06 0.0007 189.47 0.0013 500 0.48 0.00 0.00 0.0000 189.47 0.0000

1000 0.12 0.03 0.01 0.0002 64.58 0.0005 1000 0.12 0.00 0.00 0.0000 64.58 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 162.66 0.00 0.00 0.0000 12417.79 0.0000 20 47.41 20.18 0.2296 0.0874

30 86.38 0.00 0.00 0.0000 9254.67 0.0000 30 25.18 10.72 0.1219 0.0651

40 53.51 0.00 0.00 0.0000 7114.91 0.0000 40 15.60 6.64 0.0755 0.0501

50 36.43 0.00 0.00 0.0000 5625.45 0.0000 50 10.62 4.52 0.0514 0.0396

60 26.41 0.00 0.00 0.0000 4555.43 0.0000 60 7.70 3.28 0.0373 0.0320

80 15.71 0.00 0.00 0.0000 3163.52 0.0000 80 4.58 1.95 0.0222 0.0223

100 10.41 0.00 0.00 0.0000 2329.10 0.0000 100 3.03 1.29 0.0147 0.0164

150 4.86 0.00 0.00 0.0000 1281.78 0.0000 150 1.42 0.60 0.0069 0.0090

200 2.81 0.00 0.00 0.0000 820.22 0.0000 200 0.82 0.35 0.0040 0.0058

250 1.83 0.00 0.00 0.0000 575.61 0.0000 250 0.53 0.23 0.0026 0.0040

500 0.48 0.00 0.00 0.0000 189.47 0.0000 500 0.14 0.06 0.0007 0.0013

1000 0.12 0.00 0.00 0.0000 64.58 0.0000 1000 0.03 0.01 0.0002 0.0005

D-43
Facility G-01 - 55% Perc, 25% MeCl

Met Set: Burbank

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0823 op hrs/wk: 57 Acu Rate [g/s]: 0.0374

Ann Rate [g/s]: 0.0289 Ann Rate [g/s]: 0.0131

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 162.66 27.74 11.81 0.1343 12417.79 0.0511 20 162.66 2.13 0.91 0.0007 12417.79 0.0332

30 86.38 14.73 6.27 0.0713 9254.67 0.0381 30 86.38 1.13 0.48 0.0004 9254.67 0.0247

40 53.51 9.12 3.88 0.0442 7114.91 0.0293 40 53.51 0.70 0.30 0.0002 7114.91 0.0190

50 36.43 6.21 2.64 0.0301 5625.45 0.0231 50 36.43 0.48 0.20 0.0002 5625.45 0.0150

60 26.41 4.50 1.92 0.0218 4555.43 0.0187 60 26.41 0.35 0.15 0.0001 4555.43 0.0122

80 15.71 2.68 1.14 0.0130 3163.52 0.0130 80 15.71 0.21 0.09 0.0001 3163.52 0.0085

100 10.41 1.78 0.76 0.0086 2329.10 0.0096 100 10.41 0.14 0.06 4.5E-05 2329.10 0.0062

150 4.86 0.83 0.35 0.0040 1281.78 0.0053 150 4.86 0.06 0.03 2.1E-05 1281.78 0.0034

200 2.81 0.48 0.20 0.0023 820.22 0.0034 200 2.81 0.04 0.02 1.2E-05 820.22 0.0022

250 1.83 0.31 0.13 0.0015 575.61 0.0024 250 1.83 0.02 0.01 8.0E-06 575.61 0.0015

500 0.48 0.08 0.03 0.0004 189.47 0.0008 500 0.48 0.01 0.00 2.1E-06 189.47 0.0005

1000 0.12 0.02 0.01 0.0001 64.58 0.0003 1000 0.12 0.00 0.00 5.2E-07 64.58 0.0002

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 162.66 0.00 0.00 0.0000 12417.79 0.0000 20 29.87 12.71 0.1350 0.0843

30 86.38 0.00 0.00 0.0000 9254.67 0.0000 30 15.86 6.75 0.0717 0.0628

40 53.51 0.00 0.00 0.0000 7114.91 0.0000 40 9.82 4.18 0.0444 0.0483

50 36.43 0.00 0.00 0.0000 5625.45 0.0000 50 6.69 2.85 0.0302 0.0382

60 26.41 0.00 0.00 0.0000 4555.43 0.0000 60 4.85 2.06 0.0219 0.0309

80 15.71 0.00 0.00 0.0000 3163.52 0.0000 80 2.88 1.23 0.0130 0.0215

100 10.41 0.00 0.00 0.0000 2329.10 0.0000 100 1.91 0.81 0.0086 0.0158

150 4.86 0.00 0.00 0.0000 1281.78 0.0000 150 0.89 0.38 0.0040 0.0087

200 2.81 0.00 0.00 0.0000 820.22 0.0000 200 0.52 0.22 0.0023 0.0056

250 1.83 0.00 0.00 0.0000 575.61 0.0000 250 0.34 0.14 0.0015 0.0039

500 0.48 0.00 0.00 0.0000 189.47 0.0000 500 0.09 0.04 0.0004 0.0013

1000 0.12 0.00 0.00 0.0000 64.58 0.0000 1000 0.02 0.01 0.0001 0.0004

D-44
Facility G-01 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Burbank

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0599 op hrs/wk: 57 Acu Rate [g/s]: 0.0449

Ann Rate [g/s]: 0.0210 Ann Rate [g/s]: 0.0158

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 162.66 20.15 8.58 0.0976 12417.79 0.0372 20 162.66 2.57 1.09 0.0009 12417.79 0.0398

30 86.38 10.70 4.56 0.0518 9254.67 0.0277 30 86.38 1.36 0.58 0.0005 9254.67 0.0297

40 53.51 6.63 2.82 0.0321 7114.91 0.0213 40 53.51 0.85 0.36 0.0003 7114.91 0.0228

50 36.43 4.51 1.92 0.0219 5625.45 0.0168 50 36.43 0.58 0.25 0.0002 5625.45 0.0180

60 26.41 3.27 1.39 0.0158 4555.43 0.0136 60 26.41 0.42 0.18 0.0001 4555.43 0.0146

80 15.71 1.95 0.83 0.0094 3163.52 0.0095 80 15.71 0.25 0.11 0.0001 3163.52 0.0101

100 10.41 1.29 0.55 0.0062 2329.10 0.0070 100 10.41 0.16 0.07 0.0001 2329.10 0.0075

150 4.86 0.60 0.26 0.0029 1281.78 0.0038 150 4.86 0.08 0.03 2.6E-05 1281.78 0.0041

200 2.81 0.35 0.15 0.0017 820.22 0.0025 200 2.81 0.04 0.02 1.5E-05 820.22 0.0026

250 1.83 0.23 0.10 0.0011 575.61 0.0017 250 1.83 0.03 0.01 9.6E-06 575.61 0.0018

500 0.48 0.06 0.03 0.0003 189.47 0.0006 500 0.48 0.01 0.00 2.5E-06 189.47 0.0006

1000 0.12 0.01 0.01 0.0001 64.58 0.0002 1000 0.12 0.00 0.00 6.3E-07 64.58 0.0002

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0299

Ann Rate [g/s]: 0.0105

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 162.66 3.42 1.45 0.0027 12417.79 0.0000 20 26.14 11.13 0.1011 0.0770

30 86.38 1.81 0.77 0.0014 9254.67 0.0000 30 13.88 5.91 0.0537 0.0574

40 53.51 1.12 0.48 0.0009 7114.91 0.0000 40 8.60 3.66 0.0333 0.0441

50 36.43 0.77 0.33 0.0006 5625.45 0.0000 50 5.85 2.49 0.0226 0.0349

60 26.41 0.55 0.24 0.0004 4555.43 0.0000 60 4.24 1.81 0.0164 0.0283

80 15.71 0.33 0.14 0.0003 3163.52 0.0000 80 2.52 1.07 0.0098 0.0196

100 10.41 0.22 0.09 0.0002 2329.10 0.0000 100 1.67 0.71 0.0065 0.0144

150 4.86 0.10 0.04 0.0001 1281.78 0.0000 150 0.78 0.33 0.0030 0.0079

200 2.81 0.06 0.03 4.6E-05 820.22 0.0000 200 0.45 0.19 0.0017 0.0051

250 1.83 0.04 0.02 3.0E-05 575.61 0.0000 250 0.29 0.13 0.0011 0.0036

500 0.48 0.01 0.00 7.9E-06 189.47 0.0000 500 0.08 0.03 0.0003 0.0012

1000 0.12 0.00 0.00 2.0E-06 64.58 0.0000 1000 0.02 0.01 0.0001 0.0004

D-45
Facility G-01 - 55% Perc, 43% TCE

Met Set: Burbank

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0823 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0289 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 162.66 27.74 11.81 0.1343 12417.79 0.0511 20 162.66 0.00 0.00 0.0000 12417.79 0.0000

30 86.38 14.73 6.27 0.0713 9254.67 0.0381 30 86.38 0.00 0.00 0.0000 9254.67 0.0000

40 53.51 9.12 3.88 0.0442 7114.91 0.0293 40 53.51 0.00 0.00 0.0000 7114.91 0.0000

50 36.43 6.21 2.64 0.0301 5625.45 0.0231 50 36.43 0.00 0.00 0.0000 5625.45 0.0000

60 26.41 4.50 1.92 0.0218 4555.43 0.0187 60 26.41 0.00 0.00 0.0000 4555.43 0.0000

80 15.71 2.68 1.14 0.0130 3163.52 0.0130 80 15.71 0.00 0.00 0.0000 3163.52 0.0000

100 10.41 1.78 0.76 0.0086 2329.10 0.0096 100 10.41 0.00 0.00 0.0000 2329.10 0.0000

150 4.86 0.83 0.35 0.0040 1281.78 0.0053 150 4.86 0.00 0.00 0.0000 1281.78 0.0000

200 2.81 0.48 0.20 0.0023 820.22 0.0034 200 2.81 0.00 0.00 0.0000 820.22 0.0000

250 1.83 0.31 0.13 0.0015 575.61 0.0024 250 1.83 0.00 0.00 0.0000 575.61 0.0000

500 0.48 0.08 0.03 0.0004 189.47 0.0008 500 0.48 0.00 0.00 0.0000 189.47 0.0000

1000 0.12 0.02 0.01 0.0001 64.58 0.0003 1000 0.12 0.00 0.00 0.0000 64.58 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0644

Ann Rate [g/s]: 0.0226

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 162.66 7.35 3.13 0.0057 12417.79 0.0000 20 35.09 14.94 0.1401 0.0511

30 86.38 3.90 1.66 0.0031 9254.67 0.0000 30 18.63 7.93 0.0744 0.0381

40 53.51 2.42 1.03 0.0019 7114.91 0.0000 40 11.54 4.91 0.0461 0.0293

50 36.43 1.65 0.70 0.0013 5625.45 0.0000 50 7.86 3.35 0.0314 0.0231

60 26.41 1.19 0.51 0.0009 4555.43 0.0000 60 5.70 2.43 0.0227 0.0187

80 15.71 0.71 0.30 0.0006 3163.52 0.0000 80 3.39 1.44 0.0135 0.0130

100 10.41 0.47 0.20 0.0004 2329.10 0.0000 100 2.25 0.96 0.0090 0.0096

150 4.86 0.22 0.09 0.0002 1281.78 0.0000 150 1.05 0.45 0.0042 0.0053

200 2.81 0.13 0.05 0.0001 820.22 0.0000 200 0.61 0.26 0.0024 0.0034

250 1.83 0.08 0.04 0.0001 575.61 0.0000 250 0.39 0.17 0.0016 0.0024

500 0.48 0.02 0.01 1.7E-05 189.47 0.0000 500 0.10 0.04 0.0004 0.0008

1000 0.12 0.01 0.00 4.2E-06 64.58 0.0000 1000 0.03 0.01 0.0001 0.0003

D-46
Facility G-01 - 94% Perc

Met Set: Anaheim

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1407 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0494 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 219.02 63.84 27.17 0.3091 12413.44 0.0873 20 219.02 0.00 0.00 0.0000 12413.44 0.0000

30 115.95 33.79 14.39 0.1637 9249.49 0.0651 30 115.95 0.00 0.00 0.0000 9249.49 0.0000

40 71.59 20.87 8.88 0.1010 7109.62 0.0500 40 71.59 0.00 0.00 0.0000 7109.62 0.0000

50 48.59 14.16 6.03 0.0686 5620.40 0.0395 50 48.59 0.00 0.00 0.0000 5620.40 0.0000

60 35.13 10.24 4.36 0.0496 4550.74 0.0320 60 35.13 0.00 0.00 0.0000 4550.74 0.0000

80 20.81 6.07 2.58 0.0294 3159.60 0.0222 80 20.81 0.00 0.00 0.0000 3159.60 0.0000

100 13.75 4.01 1.71 0.0194 2325.83 0.0164 100 13.75 0.00 0.00 0.0000 2325.83 0.0000

150 6.38 1.86 0.79 0.0090 1279.62 0.0090 150 6.38 0.00 0.00 0.0000 1279.62 0.0000

200 3.67 1.07 0.46 0.0052 818.68 0.0058 200 3.67 0.00 0.00 0.0000 818.68 0.0000

250 2.38 0.69 0.30 0.0034 574.45 0.0040 250 2.38 0.00 0.00 0.0000 574.45 0.0000

500 0.61 0.18 0.08 0.0009 189.33 0.0013 500 0.61 0.00 0.00 0.0000 189.33 0.0000

1000 0.16 0.05 0.02 0.0002 64.55 0.0005 1000 0.16 0.00 0.00 0.0000 64.55 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 219.02 0.00 0.00 0.0000 12413.44 0.0000 20 63.84 27.17 0.3091 0.0873

30 115.95 0.00 0.00 0.0000 9249.49 0.0000 30 33.79 14.39 0.1637 0.0651

40 71.59 0.00 0.00 0.0000 7109.62 0.0000 40 20.87 8.88 0.1010 0.0500

50 48.59 0.00 0.00 0.0000 5620.40 0.0000 50 14.16 6.03 0.0686 0.0395

60 35.13 0.00 0.00 0.0000 4550.74 0.0000 60 10.24 4.36 0.0496 0.0320

80 20.81 0.00 0.00 0.0000 3159.60 0.0000 80 6.07 2.58 0.0294 0.0222

100 13.75 0.00 0.00 0.0000 2325.83 0.0000 100 4.01 1.71 0.0194 0.0164

150 6.38 0.00 0.00 0.0000 1279.62 0.0000 150 1.86 0.79 0.0090 0.0090

200 3.67 0.00 0.00 0.0000 818.68 0.0000 200 1.07 0.46 0.0052 0.0058

250 2.38 0.00 0.00 0.0000 574.45 0.0000 250 0.69 0.30 0.0034 0.0040

500 0.61 0.00 0.00 0.0000 189.33 0.0000 500 0.18 0.08 0.0009 0.0013

1000 0.16 0.00 0.00 0.0000 64.55 0.0000 1000 0.05 0.02 0.0002 0.0005

D-47
Facility G-01 - 55% Perc, 25% MeCl

Met Set: Anaheim

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0823 op hrs/wk: 57 Acu Rate [g/s]: 0.0374

Ann Rate [g/s]: 0.0289 Ann Rate [g/s]: 0.0131

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 219.02 37.35 15.90 0.1808 12413.44 0.0511 20 219.02 2.87 1.22 0.0010 12413.44 0.0332

30 115.95 19.77 8.42 0.0957 9249.49 0.0381 30 115.95 1.52 0.65 0.0005 9249.49 0.0247

40 71.59 12.21 5.20 0.0591 7109.62 0.0293 40 71.59 0.94 0.40 0.0003 7109.62 0.0190

50 48.59 8.29 3.53 0.0401 5620.40 0.0231 50 48.59 0.64 0.27 0.0002 5620.40 0.0150

60 35.13 5.99 2.55 0.0290 4550.74 0.0187 60 35.13 0.46 0.20 0.0002 4550.74 0.0122

80 20.81 3.55 1.51 0.0172 3159.60 0.0130 80 20.81 0.27 0.12 0.0001 3159.60 0.0084

100 13.75 2.34 1.00 0.0114 2325.83 0.0096 100 13.75 0.18 0.08 0.0001 2325.83 0.0062

150 6.38 1.09 0.46 0.0053 1279.62 0.0053 150 6.38 0.08 0.04 2.8E-05 1279.62 0.0034

200 3.67 0.63 0.27 0.0030 818.68 0.0034 200 3.67 0.05 0.02 1.6E-05 818.68 0.0022

250 2.38 0.41 0.17 0.0020 574.45 0.0024 250 2.38 0.03 0.01 1.0E-05 574.45 0.0015

500 0.61 0.10 0.04 0.0005 189.33 0.0008 500 0.61 0.01 0.00 2.7E-06 189.33 0.0005

1000 0.16 0.03 0.01 0.0001 64.55 0.0003 1000 0.16 0.00 0.00 7.0E-07 64.55 0.0002

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 219.02 0.00 0.00 0.0000 12413.44 0.0000 20 40.21 17.12 0.1818 0.0842

30 115.95 0.00 0.00 0.0000 9249.49 0.0000 30 21.29 9.06 0.0962 0.0628

40 71.59 0.00 0.00 0.0000 7109.62 0.0000 40 13.14 5.60 0.0594 0.0482

50 48.59 0.00 0.00 0.0000 5620.40 0.0000 50 8.92 3.80 0.0403 0.0381

60 35.13 0.00 0.00 0.0000 4550.74 0.0000 60 6.45 2.75 0.0292 0.0309

80 20.81 0.00 0.00 0.0000 3159.60 0.0000 80 3.82 1.63 0.0173 0.0214

100 13.75 0.00 0.00 0.0000 2325.83 0.0000 100 2.52 1.07 0.0114 0.0158

150 6.38 0.00 0.00 0.0000 1279.62 0.0000 150 1.17 0.50 0.0053 0.0087

200 3.67 0.00 0.00 0.0000 818.68 0.0000 200 0.67 0.29 0.0030 0.0056

250 2.38 0.00 0.00 0.0000 574.45 0.0000 250 0.44 0.19 0.0020 0.0039

500 0.61 0.00 0.00 0.0000 189.33 0.0000 500 0.11 0.05 0.0005 0.0013

1000 0.16 0.00 0.00 0.0000 64.55 0.0000 1000 0.03 0.01 0.0001 0.0004

D-48
Facility G-01 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Anaheim

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0599 op hrs/wk: 57 Acu Rate [g/s]: 0.0449

Ann Rate [g/s]: 0.0210 Ann Rate [g/s]: 0.0158

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 219.02 27.14 11.55 0.1314 12413.44 0.0372 20 219.02 3.46 1.47 0.0012 12413.44 0.0398

30 115.95 14.37 6.12 0.0696 9249.49 0.0277 30 115.95 1.83 0.78 0.0006 9249.49 0.0297

40 71.59 8.87 3.78 0.0430 7109.62 0.0213 40 71.59 1.13 0.48 0.0004 7109.62 0.0228

50 48.59 6.02 2.56 0.0292 5620.40 0.0168 50 48.59 0.77 0.33 0.0003 5620.40 0.0180

60 35.13 4.35 1.85 0.0211 4550.74 0.0136 60 35.13 0.56 0.24 0.0002 4550.74 0.0146

80 20.81 2.58 1.10 0.0125 3159.60 0.0095 80 20.81 0.33 0.14 0.0001 3159.60 0.0101

100 13.75 1.70 0.73 0.0083 2325.83 0.0070 100 13.75 0.22 0.09 0.0001 2325.83 0.0075

150 6.38 0.79 0.34 0.0038 1279.62 0.0038 150 6.38 0.10 0.04 3.4E-05 1279.62 0.0041

200 3.67 0.45 0.19 0.0022 818.68 0.0025 200 3.67 0.06 0.02 1.9E-05 818.68 0.0026

250 2.38 0.29 0.13 0.0014 574.45 0.0017 250 2.38 0.04 0.02 1.3E-05 574.45 0.0018

500 0.61 0.08 0.03 0.0004 189.33 0.0006 500 0.61 0.01 0.00 3.2E-06 189.33 0.0006

1000 0.16 0.02 0.01 0.0001 64.55 0.0002 1000 0.16 0.00 0.00 8.4E-07 64.55 0.0002

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0299

Ann Rate [g/s]: 0.0105

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 219.02 4.60 1.96 0.0036 12413.44 0.0000 20 35.20 14.98 0.1362 0.0770

30 115.95 2.43 1.04 0.0019 9249.49 0.0000 30 18.63 7.93 0.0721 0.0574

40 71.59 1.50 0.64 0.0012 7109.62 0.0000 40 11.50 4.90 0.0445 0.0441

50 48.59 1.02 0.43 0.0008 5620.40 0.0000 50 7.81 3.32 0.0302 0.0349

60 35.13 0.74 0.31 0.0006 4550.74 0.0000 60 5.65 2.40 0.0218 0.0282

80 20.81 0.44 0.19 0.0003 3159.60 0.0000 80 3.34 1.42 0.0129 0.0196

100 13.75 0.29 0.12 0.0002 2325.83 0.0000 100 2.21 0.94 0.0085 0.0144

150 6.38 0.13 0.06 0.0001 1279.62 0.0000 150 1.03 0.44 0.0040 0.0079

200 3.67 0.08 0.03 0.0001 818.68 0.0000 200 0.59 0.25 0.0023 0.0051

250 2.38 0.05 0.02 3.9E-05 574.45 0.0000 250 0.38 0.16 0.0015 0.0036

500 0.61 0.01 0.01 1.0E-05 189.33 0.0000 500 0.10 0.04 0.0004 0.0012

1000 0.16 0.00 0.00 2.6E-06 64.55 0.0000 1000 0.03 0.01 0.0001 0.0004

D-49
Facility G-01 - 55% Perc, 43% TCE

Met Set: Anaheim

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0823 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0289 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 219.02 37.35 15.90 0.1808 12413.44 0.0511 20 219.02 0.00 0.00 0.0000 12413.44 0.0000

30 115.95 19.77 8.42 0.0957 9249.49 0.0381 30 115.95 0.00 0.00 0.0000 9249.49 0.0000

40 71.59 12.21 5.20 0.0591 7109.62 0.0293 40 71.59 0.00 0.00 0.0000 7109.62 0.0000

50 48.59 8.29 3.53 0.0401 5620.40 0.0231 50 48.59 0.00 0.00 0.0000 5620.40 0.0000

60 35.13 5.99 2.55 0.0290 4550.74 0.0187 60 35.13 0.00 0.00 0.0000 4550.74 0.0000

80 20.81 3.55 1.51 0.0172 3159.60 0.0130 80 20.81 0.00 0.00 0.0000 3159.60 0.0000

100 13.75 2.34 1.00 0.0114 2325.83 0.0096 100 13.75 0.00 0.00 0.0000 2325.83 0.0000

150 6.38 1.09 0.46 0.0053 1279.62 0.0053 150 6.38 0.00 0.00 0.0000 1279.62 0.0000

200 3.67 0.63 0.27 0.0030 818.68 0.0034 200 3.67 0.00 0.00 0.0000 818.68 0.0000

250 2.38 0.41 0.17 0.0020 574.45 0.0024 250 2.38 0.00 0.00 0.0000 574.45 0.0000

500 0.61 0.10 0.04 0.0005 189.33 0.0008 500 0.61 0.00 0.00 0.0000 189.33 0.0000

1000 0.16 0.03 0.01 0.0001 64.55 0.0003 1000 0.16 0.00 0.00 0.0000 64.55 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0644

Ann Rate [g/s]: 0.0226

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 219.02 9.90 4.21 0.0077 12413.44 0.0000 20 47.24 20.11 0.1886 0.0511

30 115.95 5.24 2.23 0.0041 9249.49 0.0000 30 25.01 10.65 0.0998 0.0381

40 71.59 3.24 1.38 0.0025 7109.62 0.0000 40 15.44 6.57 0.0616 0.0293

50 48.59 2.20 0.93 0.0017 5620.40 0.0000 50 10.48 4.46 0.0418 0.0231

60 35.13 1.59 0.68 0.0012 4550.74 0.0000 60 7.58 3.23 0.0302 0.0187

80 20.81 0.94 0.40 0.0007 3159.60 0.0000 80 4.49 1.91 0.0179 0.0130

100 13.75 0.62 0.26 0.0005 2325.83 0.0000 100 2.97 1.26 0.0118 0.0096

150 6.38 0.29 0.12 0.0002 1279.62 0.0000 150 1.38 0.59 0.0055 0.0053

200 3.67 0.17 0.07 0.0001 818.68 0.0000 200 0.79 0.34 0.0032 0.0034

250 2.38 0.11 0.05 0.0001 574.45 0.0000 250 0.51 0.22 0.0020 0.0024

500 0.61 0.03 0.01 2.2E-05 189.33 0.0000 500 0.13 0.06 0.0005 0.0008

1000 0.16 0.01 0.00 5.7E-06 64.55 0.0000 1000 0.03 0.01 0.0001 0.0003

D-50
Facility G-01 - 94% Perc

Met Set: Oakland

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1407 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0494 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 91.71 26.73 11.38 0.1294 10519.95 0.0740 20 91.71 0.00 0.00 0.0000 10519.95 0.0000

30 49.17 14.33 6.10 0.0694 8021.08 0.0564 30 49.17 0.00 0.00 0.0000 8021.08 0.0000

40 30.65 8.93 3.80 0.0433 6281.76 0.0442 40 30.65 0.00 0.00 0.0000 6281.76 0.0000

50 20.94 6.10 2.60 0.0296 5029.68 0.0354 50 20.94 0.00 0.00 0.0000 5029.68 0.0000

60 15.22 4.44 1.89 0.0215 4106.19 0.0289 60 15.22 0.00 0.00 0.0000 4106.19 0.0000

80 9.09 2.65 1.13 0.0128 2877.44 0.0202 80 9.09 0.00 0.00 0.0000 2877.44 0.0000

100 6.04 1.76 0.75 0.0085 2127.42 0.0150 100 6.04 0.00 0.00 0.0000 2127.42 0.0000

150 2.83 0.82 0.35 0.0040 1174.14 0.0083 150 2.83 0.00 0.00 0.0000 1174.14 0.0000

200 1.64 0.48 0.20 0.0023 750.86 0.0053 200 1.64 0.00 0.00 0.0000 750.86 0.0000

250 1.07 0.31 0.13 0.0015 526.14 0.0037 250 1.07 0.00 0.00 0.0000 526.14 0.0000

500 0.28 0.08 0.03 0.0004 171.69 0.0012 500 0.28 0.00 0.00 0.0000 171.69 0.0000

1000 0.07 0.02 0.01 0.0001 57.64 0.0004 1000 0.07 0.00 0.00 0.0000 57.64 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 91.71 0.00 0.00 0.0000 10519.95 0.0000 20 26.73 11.38 0.1294 0.0740

30 49.17 0.00 0.00 0.0000 8021.08 0.0000 30 14.33 6.10 0.0694 0.0564

40 30.65 0.00 0.00 0.0000 6281.76 0.0000 40 8.93 3.80 0.0433 0.0442

50 20.94 0.00 0.00 0.0000 5029.68 0.0000 50 6.10 2.60 0.0296 0.0354

60 15.22 0.00 0.00 0.0000 4106.19 0.0000 60 4.44 1.89 0.0215 0.0289

80 9.09 0.00 0.00 0.0000 2877.44 0.0000 80 2.65 1.13 0.0128 0.0202

100 6.04 0.00 0.00 0.0000 2127.42 0.0000 100 1.76 0.75 0.0085 0.0150

150 2.83 0.00 0.00 0.0000 1174.14 0.0000 150 0.82 0.35 0.0040 0.0083

200 1.64 0.00 0.00 0.0000 750.86 0.0000 200 0.48 0.20 0.0023 0.0053

250 1.07 0.00 0.00 0.0000 526.14 0.0000 250 0.31 0.13 0.0015 0.0037

500 0.28 0.00 0.00 0.0000 171.69 0.0000 500 0.08 0.03 0.0004 0.0012

1000 0.07 0.00 0.00 0.0000 57.64 0.0000 1000 0.02 0.01 0.0001 0.0004

D-51
Facility G-01 - 55% Perc, 25% MeCl

Met Set: Oakland

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0823 op hrs/wk: 57 Acu Rate [g/s]: 0.0374

Ann Rate [g/s]: 0.0289 Ann Rate [g/s]: 0.0131

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 91.71 15.64 6.66 0.0757 10519.95 0.0433 20 91.71 1.20 0.51 0.0004 10519.95 0.0281

30 49.17 8.38 3.57 0.0406 8021.08 0.0330 30 49.17 0.64 0.27 0.0002 8021.08 0.0214

40 30.65 5.23 2.22 0.0253 6281.76 0.0258 40 30.65 0.40 0.17 0.0001 6281.76 0.0168

50 20.94 3.57 1.52 0.0173 5029.68 0.0207 50 20.94 0.27 0.12 0.0001 5029.68 0.0134

60 15.22 2.60 1.10 0.0126 4106.19 0.0169 60 15.22 0.20 0.08 0.0001 4106.19 0.0110

80 9.09 1.55 0.66 0.0075 2877.44 0.0118 80 9.09 0.12 0.05 4.0E-05 2877.44 0.0077

100 6.04 1.03 0.44 0.0050 2127.42 0.0088 100 6.04 0.08 0.03 2.6E-05 2127.42 0.0057

150 2.83 0.48 0.21 0.0023 1174.14 0.0048 150 2.83 0.04 0.02 1.2E-05 1174.14 0.0031

200 1.64 0.28 0.12 0.0014 750.86 0.0031 200 1.64 0.02 0.01 7.2E-06 750.86 0.0020

250 1.07 0.18 0.08 0.0009 526.14 0.0022 250 1.07 0.01 0.01 4.7E-06 526.14 0.0014

500 0.28 0.05 0.02 0.0002 171.69 0.0007 500 0.28 0.00 0.00 1.2E-06 171.69 0.0005

1000 0.07 0.01 0.01 0.0001 57.64 0.0002 1000 0.07 0.00 0.00 3.1E-07 57.64 0.0002

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 91.71 0.00 0.00 0.0000 10519.95 0.0000 20 16.84 7.17 0.0761 0.0714

30 49.17 0.00 0.00 0.0000 8021.08 0.0000 30 9.03 3.84 0.0408 0.0544

40 30.65 0.00 0.00 0.0000 6281.76 0.0000 40 5.63 2.40 0.0254 0.0426

50 20.94 0.00 0.00 0.0000 5029.68 0.0000 50 3.84 1.64 0.0174 0.0341

60 15.22 0.00 0.00 0.0000 4106.19 0.0000 60 2.79 1.19 0.0126 0.0279

80 9.09 0.00 0.00 0.0000 2877.44 0.0000 80 1.67 0.71 0.0075 0.0195

100 6.04 0.00 0.00 0.0000 2127.42 0.0000 100 1.11 0.47 0.0050 0.0144

150 2.83 0.00 0.00 0.0000 1174.14 0.0000 150 0.52 0.22 0.0023 0.0080

200 1.64 0.00 0.00 0.0000 750.86 0.0000 200 0.30 0.13 0.0014 0.0051

250 1.07 0.00 0.00 0.0000 526.14 0.0000 250 0.20 0.08 0.0009 0.0036

500 0.28 0.00 0.00 0.0000 171.69 0.0000 500 0.05 0.02 0.0002 0.0012

1000 0.07 0.00 0.00 0.0000 57.64 0.0000 1000 0.01 0.01 0.0001 0.0004

D-52
Facility G-01 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Oakland

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0599 op hrs/wk: 57 Acu Rate [g/s]: 0.0449

Ann Rate [g/s]: 0.0210 Ann Rate [g/s]: 0.0158

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 91.71 11.36 4.84 0.0550 10519.95 0.0315 20 91.71 1.45 0.62 0.0005 10519.95 0.0337

30 49.17 6.09 2.59 0.0295 8021.08 0.0240 30 49.17 0.78 0.33 0.0003 8021.08 0.0257

40 30.65 3.80 1.62 0.0184 6281.76 0.0188 40 30.65 0.48 0.21 0.0002 6281.76 0.0201

50 20.94 2.59 1.10 0.0126 5029.68 0.0151 50 20.94 0.33 0.14 0.0001 5029.68 0.0161

60 15.22 1.89 0.80 0.0091 4106.19 0.0123 60 15.22 0.24 0.10 0.0001 4106.19 0.0132

80 9.09 1.13 0.48 0.0055 2877.44 0.0086 80 9.09 0.14 0.06 4.8E-05 2877.44 0.0092

100 6.04 0.75 0.32 0.0036 2127.42 0.0064 100 6.04 0.10 0.04 3.2E-05 2127.42 0.0068

150 2.83 0.35 0.15 0.0017 1174.14 0.0035 150 2.83 0.04 0.02 1.5E-05 1174.14 0.0038

200 1.64 0.20 0.09 0.0010 750.86 0.0022 200 1.64 0.03 0.01 8.6E-06 750.86 0.0024

250 1.07 0.13 0.06 0.0006 526.14 0.0016 250 1.07 0.02 0.01 5.6E-06 526.14 0.0017

500 0.28 0.03 0.01 0.0002 171.69 0.0005 500 0.28 0.00 0.00 1.5E-06 171.69 0.0006

1000 0.07 0.01 0.00 4.2E-05 57.64 0.0002 1000 0.07 0.00 0.00 3.7E-07 57.64 0.0002

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0299

Ann Rate [g/s]: 0.0105

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 91.71 1.93 0.82 0.0015 10519.95 0.0000 20 14.74 6.27 0.0570 0.0652

30 49.17 1.03 0.44 0.0008 8021.08 0.0000 30 7.90 3.36 0.0306 0.0497

40 30.65 0.64 0.27 0.0005 6281.76 0.0000 40 4.93 2.10 0.0191 0.0390

50 20.94 0.44 0.19 0.0003 5029.68 0.0000 50 3.37 1.43 0.0130 0.0312

60 15.22 0.32 0.14 0.0002 4106.19 0.0000 60 2.45 1.04 0.0095 0.0255

80 9.09 0.19 0.08 0.0001 2877.44 0.0000 80 1.46 0.62 0.0057 0.0178

100 6.04 0.13 0.05 0.0001 2127.42 0.0000 100 0.97 0.41 0.0038 0.0132

150 2.83 0.06 0.03 4.6E-05 1174.14 0.0000 150 0.45 0.19 0.0018 0.0073

200 1.64 0.03 0.01 2.7E-05 750.86 0.0000 200 0.26 0.11 0.0010 0.0047

250 1.07 0.02 0.01 1.8E-05 526.14 0.0000 250 0.17 0.07 0.0007 0.0033

500 0.28 0.01 0.00 4.6E-06 171.69 0.0000 500 0.04 0.02 0.0002 0.0011

1000 0.07 0.00 0.00 1.1E-06 57.64 0.0000 1000 0.01 0.00 4.4E-05 0.0004

D-53
Facility G-01 - 55% Perc, 43% TCE

Met Set: Oakland

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0823 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0289 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 91.71 15.64 6.66 0.0757 10519.95 0.0433 20 91.71 0.00 0.00 0.0000 10519.95 0.0000

30 49.17 8.38 3.57 0.0406 8021.08 0.0330 30 49.17 0.00 0.00 0.0000 8021.08 0.0000

40 30.65 5.23 2.22 0.0253 6281.76 0.0258 40 30.65 0.00 0.00 0.0000 6281.76 0.0000

50 20.94 3.57 1.52 0.0173 5029.68 0.0207 50 20.94 0.00 0.00 0.0000 5029.68 0.0000

60 15.22 2.60 1.10 0.0126 4106.19 0.0169 60 15.22 0.00 0.00 0.0000 4106.19 0.0000

80 9.09 1.55 0.66 0.0075 2877.44 0.0118 80 9.09 0.00 0.00 0.0000 2877.44 0.0000

100 6.04 1.03 0.44 0.0050 2127.42 0.0088 100 6.04 0.00 0.00 0.0000 2127.42 0.0000

150 2.83 0.48 0.21 0.0023 1174.14 0.0048 150 2.83 0.00 0.00 0.0000 1174.14 0.0000

200 1.64 0.28 0.12 0.0014 750.86 0.0031 200 1.64 0.00 0.00 0.0000 750.86 0.0000

250 1.07 0.18 0.08 0.0009 526.14 0.0022 250 1.07 0.00 0.00 0.0000 526.14 0.0000

500 0.28 0.05 0.02 0.0002 171.69 0.0007 500 0.28 0.00 0.00 0.0000 171.69 0.0000

1000 0.07 0.01 0.01 0.0001 57.64 0.0002 1000 0.07 0.00 0.00 0.0000 57.64 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0644

Ann Rate [g/s]: 0.0226

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 91.71 4.15 1.76 0.0032 10519.95 0.0000 20 19.78 8.42 0.0790 0.0433

30 49.17 2.22 0.95 0.0017 8021.08 0.0000 30 10.61 4.51 0.0423 0.0330

40 30.65 1.39 0.59 0.0011 6281.76 0.0000 40 6.61 2.81 0.0264 0.0258

50 20.94 0.95 0.40 0.0007 5029.68 0.0000 50 4.52 1.92 0.0180 0.0207

60 15.22 0.69 0.29 0.0005 4106.19 0.0000 60 3.28 1.40 0.0131 0.0169

80 9.09 0.41 0.17 0.0003 2877.44 0.0000 80 1.96 0.83 0.0078 0.0118

100 6.04 0.27 0.12 0.0002 2127.42 0.0000 100 1.30 0.55 0.0052 0.0088

150 2.83 0.13 0.05 0.0001 1174.14 0.0000 150 0.61 0.26 0.0024 0.0048

200 1.64 0.07 0.03 0.0001 750.86 0.0000 200 0.35 0.15 0.0014 0.0031

250 1.07 0.05 0.02 3.8E-05 526.14 0.0000 250 0.23 0.10 0.0009 0.0022

500 0.28 0.01 0.01 9.9E-06 171.69 0.0000 500 0.06 0.03 0.0002 0.0007

1000 0.07 0.00 0.00 2.5E-06 57.64 0.0000 1000 0.02 0.01 0.0001 0.0002

D-54
Facility G-01 - 94% Perc

Met Set: Default -0

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1407 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0494 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 307.03 89.49 38.09 0.4334 11342.73 0.0798 20 307.03 0.00 0.00 0.0000 11342.73 0.0000

30 229.98 67.03 28.53 0.3246 8496.33 0.0598 30 229.98 0.00 0.00 0.0000 8496.33 0.0000

40 178.09 51.91 22.09 0.2514 6579.11 0.0463 40 178.09 0.00 0.00 0.0000 6579.11 0.0000

50 141.80 41.33 17.59 0.2001 5238.72 0.0369 50 141.80 0.00 0.00 0.0000 5238.72 0.0000

60 115.56 33.68 14.34 0.1631 4269.33 0.0300 60 115.56 0.00 0.00 0.0000 4269.33 0.0000

80 81.09 23.64 10.06 0.1145 2995.85 0.0211 80 81.09 0.00 0.00 0.0000 2995.85 0.0000

100 60.18 17.54 7.47 0.0849 2223.11 0.0156 100 60.18 0.00 0.00 0.0000 2223.11 0.0000

150 33.55 9.78 4.16 0.0473 1239.31 0.0087 150 33.55 0.00 0.00 0.0000 1239.31 0.0000

200 21.63 6.30 2.68 0.0305 799.09 0.0056 200 21.63 0.00 0.00 0.0000 799.09 0.0000

250 15.25 4.45 1.89 0.0215 563.57 0.0040 250 15.25 0.00 0.00 0.0000 563.57 0.0000

500 5.08 1.48 0.63 0.0072 187.51 0.0013 500 5.08 0.00 0.00 0.0000 187.51 0.0000

1000 1.74 0.51 0.22 0.0025 64.26 0.0005 1000 1.74 0.00 0.00 0.0000 64.26 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 307.03 0.00 0.00 0.0000 11342.73 0.0000 20 89.49 38.09 0.4334 0.0798

30 229.98 0.00 0.00 0.0000 8496.33 0.0000 30 67.03 28.53 0.3246 0.0598

40 178.09 0.00 0.00 0.0000 6579.11 0.0000 40 51.91 22.09 0.2514 0.0463

50 141.80 0.00 0.00 0.0000 5238.72 0.0000 50 41.33 17.59 0.2001 0.0369

60 115.56 0.00 0.00 0.0000 4269.33 0.0000 60 33.68 14.34 0.1631 0.0300

80 81.09 0.00 0.00 0.0000 2995.85 0.0000 80 23.64 10.06 0.1145 0.0211

100 60.18 0.00 0.00 0.0000 2223.11 0.0000 100 17.54 7.47 0.0849 0.0156

150 33.55 0.00 0.00 0.0000 1239.31 0.0000 150 9.78 4.16 0.0473 0.0087

200 21.63 0.00 0.00 0.0000 799.09 0.0000 200 6.30 2.68 0.0305 0.0056

250 15.25 0.00 0.00 0.0000 563.57 0.0000 250 4.45 1.89 0.0215 0.0040

500 5.08 0.00 0.00 0.0000 187.51 0.0000 500 1.48 0.63 0.0072 0.0013

1000 1.74 0.00 0.00 0.0000 64.26 0.0000 1000 0.51 0.22 0.0025 0.0005

D-55
Facility G-01 - 55% Perc, 25% MeCl

Met Set: Default -0

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0823 op hrs/wk: 57 Acu Rate [g/s]: 0.0374

Ann Rate [g/s]: 0.0289 Ann Rate [g/s]: 0.0131

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 307.03 52.35 22.29 0.2535 11342.73 0.0467 20 307.03 4.02 1.71 0.0013 11342.73 0.0303

30 229.98 39.21 16.69 0.1899 8496.33 0.0350 30 229.98 3.01 1.28 0.0010 8496.33 0.0227

40 178.09 30.37 12.93 0.1470 6579.11 0.0271 40 178.09 2.33 0.99 0.0008 6579.11 0.0176

50 141.80 24.18 10.29 0.1171 5238.72 0.0216 50 141.80 1.86 0.79 0.0006 5238.72 0.0140

60 115.56 19.70 8.39 0.0954 4269.33 0.0176 60 115.56 1.51 0.64 0.0005 4269.33 0.0114

80 81.09 13.83 5.89 0.0670 2995.85 0.0123 80 81.09 1.06 0.45 0.0004 2995.85 0.0080

100 60.18 10.26 4.37 0.0497 2223.11 0.0091 100 60.18 0.79 0.34 0.0003 2223.11 0.0059

150 33.55 5.72 2.43 0.0277 1239.31 0.0051 150 33.55 0.44 0.19 0.0001 1239.31 0.0033

200 21.63 3.69 1.57 0.0179 799.09 0.0033 200 21.63 0.28 0.12 0.0001 799.09 0.0021

250 15.25 2.60 1.11 0.0126 563.57 0.0023 250 15.25 0.20 0.09 0.0001 563.57 0.0015

500 5.08 0.87 0.37 0.0042 187.51 0.0008 500 5.08 0.07 0.03 2.2E-05 187.51 0.0005

1000 1.74 0.30 0.13 0.0014 64.26 0.0003 1000 1.74 0.02 0.01 7.6E-06 64.26 0.0002

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 307.03 0.00 0.00 0.0000 11342.73 0.0000 20 56.37 24.00 0.2549 0.0770

30 229.98 0.00 0.00 0.0000 8496.33 0.0000 30 42.23 17.98 0.1909 0.0577

40 178.09 0.00 0.00 0.0000 6579.11 0.0000 40 32.70 13.92 0.1478 0.0446

50 141.80 0.00 0.00 0.0000 5238.72 0.0000 50 26.04 11.08 0.1177 0.0356

60 115.56 0.00 0.00 0.0000 4269.33 0.0000 60 21.22 9.03 0.0959 0.0290

80 81.09 0.00 0.00 0.0000 2995.85 0.0000 80 14.89 6.34 0.0673 0.0203

100 60.18 0.00 0.00 0.0000 2223.11 0.0000 100 11.05 4.70 0.0500 0.0151

150 33.55 0.00 0.00 0.0000 1239.31 0.0000 150 6.16 2.62 0.0278 0.0084

200 21.63 0.00 0.00 0.0000 799.09 0.0000 200 3.97 1.69 0.0180 0.0054

250 15.25 0.00 0.00 0.0000 563.57 0.0000 250 2.80 1.19 0.0127 0.0038

500 5.08 0.00 0.00 0.0000 187.51 0.0000 500 0.93 0.40 0.0042 0.0013

1000 1.74 0.00 0.00 0.0000 64.26 0.0000 1000 0.32 0.14 0.0014 0.0004

D-56
Facility G-01 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Default -0

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0599 op hrs/wk: 57 Acu Rate [g/s]: 0.0449

Ann Rate [g/s]: 0.0210 Ann Rate [g/s]: 0.0158

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 307.03 38.04 16.19 0.1842 11342.73 0.0340 20 307.03 4.85 2.07 0.0016 11342.73 0.0364

30 229.98 28.49 12.13 0.1380 8496.33 0.0254 30 229.98 3.63 1.55 0.0012 8496.33 0.0272

40 178.09 22.06 9.39 0.1069 6579.11 0.0197 40 178.09 2.81 1.20 0.0009 6579.11 0.0211

50 141.80 17.57 7.48 0.0851 5238.72 0.0157 50 141.80 2.24 0.95 0.0007 5238.72 0.0168

60 115.56 14.32 6.10 0.0693 4269.33 0.0128 60 115.56 1.83 0.78 0.0006 4269.33 0.0137

80 81.09 10.05 4.28 0.0487 2995.85 0.0090 80 81.09 1.28 0.55 0.0004 2995.85 0.0096

100 60.18 7.46 3.17 0.0361 2223.11 0.0067 100 60.18 0.95 0.40 0.0003 2223.11 0.0071

150 33.55 4.16 1.77 0.0201 1239.31 0.0037 150 33.55 0.53 0.23 0.0002 1239.31 0.0040

200 21.63 2.68 1.14 0.0130 799.09 0.0024 200 21.63 0.34 0.15 0.0001 799.09 0.0026

250 15.25 1.89 0.80 0.0092 563.57 0.0017 250 15.25 0.24 0.10 0.0001 563.57 0.0018

500 5.08 0.63 0.27 0.0030 187.51 0.0006 500 5.08 0.08 0.03 2.7E-05 187.51 0.0006

1000 1.74 0.22 0.09 0.0010 64.26 0.0002 1000 1.74 0.03 0.01 9.2E-06 64.26 0.0002

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0299

Ann Rate [g/s]: 0.0105

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 307.03 6.45 2.74 0.0050 11342.73 0.0000 20 49.34 21.00 0.1909 0.0703

30 229.98 4.83 2.06 0.0038 8496.33 0.0000 30 36.96 15.73 0.1430 0.0527

40 178.09 3.74 1.59 0.0029 6579.11 0.0000 40 28.62 12.18 0.1107 0.0408

50 141.80 2.98 1.27 0.0023 5238.72 0.0000 50 22.79 9.70 0.0882 0.0325

60 115.56 2.43 1.03 0.0019 4269.33 0.0000 60 18.57 7.91 0.0718 0.0265

80 81.09 1.70 0.72 0.0013 2995.85 0.0000 80 13.03 5.55 0.0504 0.0186

100 60.18 1.26 0.54 0.0010 2223.11 0.0000 100 9.67 4.12 0.0374 0.0138

150 33.55 0.70 0.30 0.0006 1239.31 0.0000 150 5.39 2.29 0.0209 0.0077

200 21.63 0.45 0.19 0.0004 799.09 0.0000 200 3.48 1.48 0.0134 0.0050

250 15.25 0.32 0.14 0.0003 563.57 0.0000 250 2.45 1.04 0.0095 0.0035

500 5.08 0.11 0.05 0.0001 187.51 0.0000 500 0.82 0.35 0.0032 0.0012

1000 1.74 0.04 0.02 2.9E-05 64.26 0.0000 1000 0.28 0.12 0.0011 0.0004

D-57
Facility G-01 - 55% Perc, 43% TCE

Met Set: Default -0

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0823 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0289 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 307.03 52.35 22.29 0.2535 11342.73 0.0467 20 307.03 0.00 0.00 0.0000 11342.73 0.0000

30 229.98 39.21 16.69 0.1899 8496.33 0.0350 30 229.98 0.00 0.00 0.0000 8496.33 0.0000

40 178.09 30.37 12.93 0.1470 6579.11 0.0271 40 178.09 0.00 0.00 0.0000 6579.11 0.0000

50 141.80 24.18 10.29 0.1171 5238.72 0.0216 50 141.80 0.00 0.00 0.0000 5238.72 0.0000

60 115.56 19.70 8.39 0.0954 4269.33 0.0176 60 115.56 0.00 0.00 0.0000 4269.33 0.0000

80 81.09 13.83 5.89 0.0670 2995.85 0.0123 80 81.09 0.00 0.00 0.0000 2995.85 0.0000

100 60.18 10.26 4.37 0.0497 2223.11 0.0091 100 60.18 0.00 0.00 0.0000 2223.11 0.0000

150 33.55 5.72 2.43 0.0277 1239.31 0.0051 150 33.55 0.00 0.00 0.0000 1239.31 0.0000

200 21.63 3.69 1.57 0.0179 799.09 0.0033 200 21.63 0.00 0.00 0.0000 799.09 0.0000

250 15.25 2.60 1.11 0.0126 563.57 0.0023 250 15.25 0.00 0.00 0.0000 563.57 0.0000

500 5.08 0.87 0.37 0.0042 187.51 0.0008 500 5.08 0.00 0.00 0.0000 187.51 0.0000

1000 1.74 0.30 0.13 0.0014 64.26 0.0003 1000 1.74 0.00 0.00 0.0000 64.26 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0644

Ann Rate [g/s]: 0.0226

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 307.03 13.88 5.91 0.0108 11342.73 0.0000 20 66.23 28.19 0.2644 0.0467

30 229.98 10.40 4.43 0.0081 8496.33 0.0000 30 49.61 21.12 0.1980 0.0350

40 178.09 8.05 3.43 0.0063 6579.11 0.0000 40 38.42 16.35 0.1533 0.0271

50 141.80 6.41 2.73 0.0050 5238.72 0.0000 50 30.59 13.02 0.1221 0.0216

60 115.56 5.22 2.22 0.0041 4269.33 0.0000 60 24.93 10.61 0.0995 0.0176

80 81.09 3.67 1.56 0.0029 2995.85 0.0000 80 17.49 7.45 0.0698 0.0123

100 60.18 2.72 1.16 0.0021 2223.11 0.0000 100 12.98 5.53 0.0518 0.0091

150 33.55 1.52 0.65 0.0012 1239.31 0.0000 150 7.24 3.08 0.0289 0.0051

200 21.63 0.98 0.42 0.0008 799.09 0.0000 200 4.67 1.99 0.0186 0.0033

250 15.25 0.69 0.29 0.0005 563.57 0.0000 250 3.29 1.40 0.0131 0.0023

500 5.08 0.23 0.10 0.0002 187.51 0.0000 500 1.09 0.47 0.0044 0.0008

1000 1.74 0.08 0.03 0.0001 64.26 0.0000 1000 0.38 0.16 0.0015 0.0003

D-58
Risk Assessment Summary - 3 Generic Facilities

Multicomponent Impacts - Brake Cleaners - Acute

Facility G-01 - 94% Perc

Met Set: Fresno

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1407 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0494 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 130.29 37.97 16.16 0.1839 11155.50 0.0785 20 130.29 0.00 0.00 0.0000 11155.50 0.0000

30 68.87 20.07 8.54 0.0972 8402.65 0.0591 30 68.87 0.00 0.00 0.0000 8402.65 0.0000

40 42.46 12.38 5.27 0.0599 6521.95 0.0459 40 42.46 0.00 0.00 0.0000 6521.95 0.0000

50 28.78 8.39 3.57 0.0406 5186.31 0.0365 50 28.78 0.00 0.00 0.0000 5186.31 0.0000

60 20.79 6.06 2.58 0.0293 4214.74 0.0297 60 20.79 0.00 0.00 0.0000 4214.74 0.0000

80 12.29 3.58 1.52 0.0173 2937.50 0.0207 80 12.29 0.00 0.00 0.0000 2937.50 0.0000

100 8.11 2.36 1.01 0.0114 2165.55 0.0152 100 8.11 0.00 0.00 0.0000 2165.55 0.0000

150 3.76 1.10 0.47 0.0053 1191.61 0.0084 150 3.76 0.00 0.00 0.0000 1191.61 0.0000

200 2.16 0.63 0.27 0.0030 761.38 0.0054 200 2.16 0.00 0.00 0.0000 761.38 0.0000

250 1.40 0.41 0.17 0.0020 533.41 0.0038 250 1.40 0.00 0.00 0.0000 533.41 0.0000

500 0.36 0.10 0.04 0.0005 174.25 0.0012 500 0.36 0.00 0.00 0.0000 174.25 0.0000

1000 0.09 0.03 0.01 0.0001 58.67 0.0004 1000 0.09 0.00 0.00 0.0000 58.67 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 130.29 0.00 0.00 0.0000 11155.50 0.0000 20 37.97 16.16 0.1839 0.0785

30 68.87 0.00 0.00 0.0000 8402.65 0.0000 30 20.07 8.54 0.0972 0.0591

40 42.46 0.00 0.00 0.0000 6521.95 0.0000 40 12.38 5.27 0.0599 0.0459

50 28.78 0.00 0.00 0.0000 5186.31 0.0000 50 8.39 3.57 0.0406 0.0365

60 20.79 0.00 0.00 0.0000 4214.74 0.0000 60 6.06 2.58 0.0293 0.0297

80 12.29 0.00 0.00 0.0000 2937.50 0.0000 80 3.58 1.52 0.0173 0.0207

100 8.11 0.00 0.00 0.0000 2165.55 0.0000 100 2.36 1.01 0.0114 0.0152

150 3.76 0.00 0.00 0.0000 1191.61 0.0000 150 1.10 0.47 0.0053 0.0084

200 2.16 0.00 0.00 0.0000 761.38 0.0000 200 0.63 0.27 0.0030 0.0054

250 1.40 0.00 0.00 0.0000 533.41 0.0000 250 0.41 0.17 0.0020 0.0038

500 0.36 0.00 0.00 0.0000 174.25 0.0000 500 0.10 0.04 0.0005 0.0012

1000 0.09 0.00 0.00 0.0000 58.67 0.0000 1000 0.03 0.01 0.0001 0.0004

D-59
Facility G-01 - 55% Perc, 25% MeCl

Met Set: Fresno

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0823 op hrs/wk: 57 Acu Rate [g/s]: 0.0374

Ann Rate [g/s]: 0.0289 Ann Rate [g/s]: 0.0131

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 130.29 22.22 9.46 0.1076 11155.50 0.0459 20 130.29 1.71 0.73 0.0006 11155.50 0.0298

30 68.87 11.74 5.00 0.0569 8402.65 0.0346 30 68.87 0.90 0.38 0.0003 8402.65 0.0224

40 42.46 7.24 3.08 0.0351 6521.95 0.0268 40 42.46 0.56 0.24 0.0002 6521.95 0.0174

50 28.78 4.91 2.09 0.0238 5186.31 0.0213 50 28.78 0.38 0.16 0.0001 5186.31 0.0139

60 20.79 3.54 1.51 0.0172 4214.74 0.0173 60 20.79 0.27 0.12 0.0001 4214.74 0.0113

80 12.29 2.10 0.89 0.0101 2937.50 0.0121 80 12.29 0.16 0.07 0.0001 2937.50 0.0078

100 8.11 1.38 0.59 0.0067 2165.55 0.0089 100 8.11 0.11 0.05 3.5E-05 2165.55 0.0058

150 3.76 0.64 0.27 0.0031 1191.61 0.0049 150 3.76 0.05 0.02 1.6E-05 1191.61 0.0032

200 2.16 0.37 0.16 0.0018 761.38 0.0031 200 2.16 0.03 0.01 9.4E-06 761.38 0.0020

250 1.40 0.24 0.10 0.0012 533.41 0.0022 250 1.40 0.02 0.01 6.1E-06 533.41 0.0014

500 0.36 0.06 0.03 0.0003 174.25 0.0007 500 0.36 0.00 0.00 1.6E-06 174.25 0.0005

1000 0.09 0.02 0.01 0.0001 58.67 0.0002 1000 0.09 0.00 0.00 3.9E-07 58.67 0.0002

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 130.29 0.00 0.00 0.0000 11155.50 0.0000 20 23.92 10.18 0.1082 0.0757

30 68.87 0.00 0.00 0.0000 8402.65 0.0000 30 12.65 5.38 0.0572 0.0570

40 42.46 0.00 0.00 0.0000 6521.95 0.0000 40 7.80 3.32 0.0352 0.0443

50 28.78 0.00 0.00 0.0000 5186.31 0.0000 50 5.28 2.25 0.0239 0.0352

60 20.79 0.00 0.00 0.0000 4214.74 0.0000 60 3.82 1.62 0.0173 0.0286

80 12.29 0.00 0.00 0.0000 2937.50 0.0000 80 2.26 0.96 0.0102 0.0199

100 8.11 0.00 0.00 0.0000 2165.55 0.0000 100 1.49 0.63 0.0067 0.0147

150 3.76 0.00 0.00 0.0000 1191.61 0.0000 150 0.69 0.29 0.0031 0.0081

200 2.16 0.00 0.00 0.0000 761.38 0.0000 200 0.40 0.17 0.0018 0.0052

250 1.40 0.00 0.00 0.0000 533.41 0.0000 250 0.26 0.11 0.0012 0.0036

500 0.36 0.00 0.00 0.0000 174.25 0.0000 500 0.07 0.03 0.0003 0.0012

1000 0.09 0.00 0.00 0.0000 58.67 0.0000 1000 0.02 0.01 0.0001 0.0004

D-60
Facility G-01 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Fresno

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0599 op hrs/wk: 57 Acu Rate [g/s]: 0.0449

Ann Rate [g/s]: 0.0210 Ann Rate [g/s]: 0.0158

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 130.29 16.14 6.87 0.0782 11155.50 0.0334 20 130.29 2.06 0.88 0.0007 11155.50 0.0358

30 68.87 8.53 3.63 0.0413 8402.65 0.0252 30 68.87 1.09 0.46 0.0004 8402.65 0.0269

40 42.46 5.26 2.24 0.0255 6521.95 0.0195 40 42.46 0.67 0.29 0.0002 6521.95 0.0209

50 28.78 3.57 1.52 0.0173 5186.31 0.0155 50 28.78 0.45 0.19 0.0002 5186.31 0.0166

60 20.79 2.58 1.10 0.0125 4214.74 0.0126 60 20.79 0.33 0.14 0.0001 4214.74 0.0135

80 12.29 1.52 0.65 0.0074 2937.50 0.0088 80 12.29 0.19 0.08 0.0001 2937.50 0.0094

100 8.11 1.00 0.43 0.0049 2165.55 0.0065 100 8.11 0.13 0.05 4.3E-05 2165.55 0.0069

150 3.76 0.47 0.20 0.0023 1191.61 0.0036 150 3.76 0.06 0.03 2.0E-05 1191.61 0.0038

200 2.16 0.27 0.11 0.0013 761.38 0.0023 200 2.16 0.03 0.01 1.1E-05 761.38 0.0024

250 1.40 0.17 0.07 0.0008 533.41 0.0016 250 1.40 0.02 0.01 7.4E-06 533.41 0.0017

500 0.36 0.04 0.02 0.0002 174.25 0.0005 500 0.36 0.01 0.00 1.9E-06 174.25 0.0006

1000 0.09 0.01 0.00 0.0001 58.67 0.0002 1000 0.09 0.00 0.00 4.7E-07 58.67 0.0002

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0299

Ann Rate [g/s]: 0.0105

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 130.29 2.74 1.16 0.0021 11155.50 0.0000 20 20.94 8.91 0.0810 0.0692

30 68.87 1.45 0.62 0.0011 8402.65 0.0000 30 11.07 4.71 0.0428 0.0521

40 42.46 0.89 0.38 0.0007 6521.95 0.0000 40 6.82 2.90 0.0264 0.0405

50 28.78 0.60 0.26 0.0005 5186.31 0.0000 50 4.62 1.97 0.0179 0.0322

60 20.79 0.44 0.19 0.0003 4214.74 0.0000 60 3.34 1.42 0.0129 0.0261

80 12.29 0.26 0.11 0.0002 2937.50 0.0000 80 1.98 0.84 0.0076 0.0182

100 8.11 0.17 0.07 0.0001 2165.55 0.0000 100 1.30 0.55 0.0050 0.0134

150 3.76 0.08 0.03 0.0001 1191.61 0.0000 150 0.60 0.26 0.0023 0.0074

200 2.16 0.05 0.02 3.5E-05 761.38 0.0000 200 0.35 0.15 0.0013 0.0047

250 1.40 0.03 0.01 2.3E-05 533.41 0.0000 250 0.22 0.10 0.0009 0.0033

500 0.36 0.01 0.00 5.9E-06 174.25 0.0000 500 0.06 0.02 0.0002 0.0011

1000 0.09 0.00 0.00 1.5E-06 58.67 0.0000 1000 0.01 0.01 0.0001 0.0004

D-61
Facility G-01 - 55% Perc, 43% TCE

Met Set: Fresno

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0823 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0289 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 130.29 22.22 9.46 0.1076 11155.50 0.0459 20 130.29 0.00 0.00 0.0000 11155.50 0.0000

30 68.87 11.74 5.00 0.0569 8402.65 0.0346 30 68.87 0.00 0.00 0.0000 8402.65 0.0000

40 42.46 7.24 3.08 0.0351 6521.95 0.0268 40 42.46 0.00 0.00 0.0000 6521.95 0.0000

50 28.78 4.91 2.09 0.0238 5186.31 0.0213 50 28.78 0.00 0.00 0.0000 5186.31 0.0000

60 20.79 3.54 1.51 0.0172 4214.74 0.0173 60 20.79 0.00 0.00 0.0000 4214.74 0.0000

80 12.29 2.10 0.89 0.0101 2937.50 0.0121 80 12.29 0.00 0.00 0.0000 2937.50 0.0000

100 8.11 1.38 0.59 0.0067 2165.55 0.0089 100 8.11 0.00 0.00 0.0000 2165.55 0.0000

150 3.76 0.64 0.27 0.0031 1191.61 0.0049 150 3.76 0.00 0.00 0.0000 1191.61 0.0000

200 2.16 0.37 0.16 0.0018 761.38 0.0031 200 2.16 0.00 0.00 0.0000 761.38 0.0000

250 1.40 0.24 0.10 0.0012 533.41 0.0022 250 1.40 0.00 0.00 0.0000 533.41 0.0000

500 0.36 0.06 0.03 0.0003 174.25 0.0007 500 0.36 0.00 0.00 0.0000 174.25 0.0000

1000 0.09 0.02 0.01 0.0001 58.67 0.0002 1000 0.09 0.00 0.00 0.0000 58.67 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0644

Ann Rate [g/s]: 0.0226

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 130.29 5.89 2.51 0.0046 11155.50 0.0000 20 28.10 11.96 0.1122 0.0459

30 68.87 3.11 1.33 0.0024 8402.65 0.0000 30 14.86 6.32 0.0593 0.0346

40 42.46 1.92 0.82 0.0015 6521.95 0.0000 40 9.16 3.90 0.0366 0.0268

50 28.78 1.30 0.55 0.0010 5186.31 0.0000 50 6.21 2.64 0.0248 0.0213

60 20.79 0.94 0.40 0.0007 4214.74 0.0000 60 4.48 1.91 0.0179 0.0173

80 12.29 0.56 0.24 0.0004 2937.50 0.0000 80 2.65 1.13 0.0106 0.0121

100 8.11 0.37 0.16 0.0003 2165.55 0.0000 100 1.75 0.74 0.0070 0.0089

150 3.76 0.17 0.07 0.0001 1191.61 0.0000 150 0.81 0.35 0.0032 0.0049

200 2.16 0.10 0.04 0.0001 761.38 0.0000 200 0.47 0.20 0.0019 0.0031

250 1.40 0.06 0.03 4.9E-05 533.41 0.0000 250 0.30 0.13 0.0012 0.0022

500 0.36 0.02 0.01 1.3E-05 174.25 0.0000 500 0.08 0.03 0.0003 0.0007

1000 0.09 0.00 0.00 3.2E-06 58.67 0.0000 1000 0.02 0.01 0.0001 0.0002

D-62
Facility G-01 - 94% Perc

Met Set: Concord

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1407 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0494 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 161.57 47.09 20.05 0.2280 12417.79 0.0874 20 161.57 0.00 0.00 0.0000 12417.79 0.0000

30 86.18 25.12 10.69 0.1216 9254.67 0.0651 30 86.18 0.00 0.00 0.0000 9254.67 0.0000

40 53.59 15.62 6.65 0.0756 7114.91 0.0501 40 53.59 0.00 0.00 0.0000 7114.91 0.0000

50 36.58 10.66 4.54 0.0516 5625.45 0.0396 50 36.58 0.00 0.00 0.0000 5625.45 0.0000

60 26.58 7.75 3.30 0.0375 4555.43 0.0320 60 26.58 0.00 0.00 0.0000 4555.43 0.0000

80 15.87 4.63 1.97 0.0224 3163.52 0.0223 80 15.87 0.00 0.00 0.0000 3163.52 0.0000

100 10.55 3.07 1.31 0.0149 2329.10 0.0164 100 10.55 0.00 0.00 0.0000 2329.10 0.0000

150 4.95 1.44 0.61 0.0070 1281.78 0.0090 150 4.95 0.00 0.00 0.0000 1281.78 0.0000

200 2.86 0.83 0.35 0.0040 820.22 0.0058 200 2.86 0.00 0.00 0.0000 820.22 0.0000

250 1.87 0.55 0.23 0.0026 575.61 0.0040 250 1.87 0.00 0.00 0.0000 575.61 0.0000

500 0.49 0.14 0.06 0.0007 189.47 0.0013 500 0.49 0.00 0.00 0.0000 189.47 0.0000

1000 0.14 0.04 0.02 0.0002 64.58 0.0005 1000 0.14 0.00 0.00 0.0000 64.58 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 161.57 0.00 0.00 0.0000 12417.79 0.0000 20 47.09 20.05 0.2280 0.0874

30 86.18 0.00 0.00 0.0000 9254.67 0.0000 30 25.12 10.69 0.1216 0.0651

40 53.59 0.00 0.00 0.0000 7114.91 0.0000 40 15.62 6.65 0.0756 0.0501

50 36.58 0.00 0.00 0.0000 5625.45 0.0000 50 10.66 4.54 0.0516 0.0396

60 26.58 0.00 0.00 0.0000 4555.43 0.0000 60 7.75 3.30 0.0375 0.0320

80 15.87 0.00 0.00 0.0000 3163.52 0.0000 80 4.63 1.97 0.0224 0.0223

100 10.55 0.00 0.00 0.0000 2329.10 0.0000 100 3.07 1.31 0.0149 0.0164

150 4.95 0.00 0.00 0.0000 1281.78 0.0000 150 1.44 0.61 0.0070 0.0090

200 2.86 0.00 0.00 0.0000 820.22 0.0000 200 0.83 0.35 0.0040 0.0058

250 1.87 0.00 0.00 0.0000 575.61 0.0000 250 0.55 0.23 0.0026 0.0040

500 0.49 0.00 0.00 0.0000 189.47 0.0000 500 0.14 0.06 0.0007 0.0013

1000 0.14 0.00 0.00 0.0000 64.58 0.0000 1000 0.04 0.02 0.0002 0.0005

D-63
Facility G-01 - 55% Perc, 25% MeCl

Met Set: Concord

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0823 op hrs/wk: 57 Acu Rate [g/s]: 0.0374

Ann Rate [g/s]: 0.0289 Ann Rate [g/s]: 0.0131

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 161.57 27.55 11.73 0.1334 12417.79 0.0511 20 161.57 2.12 0.90 0.0007 12417.79 0.0332

30 86.18 14.69 6.26 0.0712 9254.67 0.0381 30 86.18 1.13 0.48 0.0004 9254.67 0.0247

40 53.59 9.14 3.89 0.0443 7114.91 0.0293 40 53.59 0.70 0.30 0.0002 7114.91 0.0190

50 36.58 6.24 2.66 0.0302 5625.45 0.0231 50 36.58 0.48 0.20 0.0002 5625.45 0.0150

60 26.58 4.53 1.93 0.0219 4555.43 0.0187 60 26.58 0.35 0.15 0.0001 4555.43 0.0122

80 15.87 2.71 1.15 0.0131 3163.52 0.0130 80 15.87 0.21 0.09 0.0001 3163.52 0.0085

100 10.55 1.80 0.77 0.0087 2329.10 0.0096 100 10.55 0.14 0.06 4.6E-05 2329.10 0.0062

150 4.95 0.84 0.36 0.0041 1281.78 0.0053 150 4.95 0.06 0.03 2.2E-05 1281.78 0.0034

200 2.86 0.49 0.21 0.0024 820.22 0.0034 200 2.86 0.04 0.02 1.2E-05 820.22 0.0022

250 1.87 0.32 0.14 0.0015 575.61 0.0024 250 1.87 0.02 0.01 8.2E-06 575.61 0.0015

500 0.49 0.08 0.04 0.0004 189.47 0.0008 500 0.49 0.01 0.00 2.1E-06 189.47 0.0005

1000 0.14 0.02 0.01 0.0001 64.58 0.0003 1000 0.14 0.00 0.00 6.1E-07 64.58 0.0002

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 161.57 0.00 0.00 0.0000 12417.79 0.0000 20 29.67 12.63 0.1341 0.0843

30 86.18 0.00 0.00 0.0000 9254.67 0.0000 30 15.82 6.74 0.0715 0.0628

40 53.59 0.00 0.00 0.0000 7114.91 0.0000 40 9.84 4.19 0.0445 0.0483

50 36.58 0.00 0.00 0.0000 5625.45 0.0000 50 6.72 2.86 0.0304 0.0382

60 26.58 0.00 0.00 0.0000 4555.43 0.0000 60 4.88 2.08 0.0221 0.0309

80 15.87 0.00 0.00 0.0000 3163.52 0.0000 80 2.91 1.24 0.0132 0.0215

100 10.55 0.00 0.00 0.0000 2329.10 0.0000 100 1.94 0.82 0.0088 0.0158

150 4.95 0.00 0.00 0.0000 1281.78 0.0000 150 0.91 0.39 0.0041 0.0087

200 2.86 0.00 0.00 0.0000 820.22 0.0000 200 0.53 0.22 0.0024 0.0056

250 1.87 0.00 0.00 0.0000 575.61 0.0000 250 0.34 0.15 0.0016 0.0039

500 0.49 0.00 0.00 0.0000 189.47 0.0000 500 0.09 0.04 0.0004 0.0013

1000 0.14 0.00 0.00 0.0000 64.58 0.0000 1000 0.03 0.01 0.0001 0.0004

D-64
Facility G-01 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Concord

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0599 op hrs/wk: 57 Acu Rate [g/s]: 0.0449

Ann Rate [g/s]: 0.0210 Ann Rate [g/s]: 0.0158

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 161.57 20.02 8.52 0.0969 12417.79 0.0372 20 161.57 2.55 1.09 0.0009 12417.79 0.0398

30 86.18 10.68 4.55 0.0517 9254.67 0.0277 30 86.18 1.36 0.58 0.0005 9254.67 0.0297

40 53.59 6.64 2.83 0.0322 7114.91 0.0213 40 53.59 0.85 0.36 0.0003 7114.91 0.0228

50 36.58 4.53 1.93 0.0219 5625.45 0.0168 50 36.58 0.58 0.25 0.0002 5625.45 0.0180

60 26.58 3.29 1.40 0.0159 4555.43 0.0136 60 26.58 0.42 0.18 0.0001 4555.43 0.0146

80 15.87 1.97 0.84 0.0095 3163.52 0.0095 80 15.87 0.25 0.11 0.0001 3163.52 0.0101

100 10.55 1.31 0.56 0.0063 2329.10 0.0070 100 10.55 0.17 0.07 0.0001 2329.10 0.0075

150 4.95 0.61 0.26 0.0030 1281.78 0.0038 150 4.95 0.08 0.03 2.6E-05 1281.78 0.0041

200 2.86 0.35 0.15 0.0017 820.22 0.0025 200 2.86 0.05 0.02 1.5E-05 820.22 0.0026

250 1.87 0.23 0.10 0.0011 575.61 0.0017 250 1.87 0.03 0.01 9.8E-06 575.61 0.0018

500 0.49 0.06 0.03 0.0003 189.47 0.0006 500 0.49 0.01 0.00 2.6E-06 189.47 0.0006

1000 0.14 0.02 0.01 0.0001 64.58 0.0002 1000 0.14 0.00 0.00 7.4E-07 64.58 0.0002

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0299

Ann Rate [g/s]: 0.0105

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 161.57 3.39 1.44 0.0027 12417.79 0.0000 20 25.96 11.05 0.1004 0.0770

30 86.18 1.81 0.77 0.0014 9254.67 0.0000 30 13.85 5.90 0.0536 0.0574

40 53.59 1.13 0.48 0.0009 7114.91 0.0000 40 8.61 3.67 0.0333 0.0441

50 36.58 0.77 0.33 0.0006 5625.45 0.0000 50 5.88 2.50 0.0227 0.0349

60 26.58 0.56 0.24 0.0004 4555.43 0.0000 60 4.27 1.82 0.0165 0.0283

80 15.87 0.33 0.14 0.0003 3163.52 0.0000 80 2.55 1.09 0.0099 0.0196

100 10.55 0.22 0.09 0.0002 2329.10 0.0000 100 1.70 0.72 0.0066 0.0144

150 4.95 0.10 0.04 0.0001 1281.78 0.0000 150 0.80 0.34 0.0031 0.0079

200 2.86 0.06 0.03 4.7E-05 820.22 0.0000 200 0.46 0.20 0.0018 0.0051

250 1.87 0.04 0.02 3.1E-05 575.61 0.0000 250 0.30 0.13 0.0012 0.0036

500 0.49 0.01 0.00 8.0E-06 189.47 0.0000 500 0.08 0.03 0.0003 0.0012

1000 0.14 0.00 0.00 2.3E-06 64.58 0.0000 1000 0.02 0.01 0.0001 0.0004

D-65
Facility G-01 - 55% Perc, 43% TCE

Met Set: Concord

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0823 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0289 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 161.57 27.55 11.73 0.1334 12417.79 0.0511 20 161.57 0.00 0.00 0.0000 12417.79 0.0000

30 86.18 14.69 6.26 0.0712 9254.67 0.0381 30 86.18 0.00 0.00 0.0000 9254.67 0.0000

40 53.59 9.14 3.89 0.0443 7114.91 0.0293 40 53.59 0.00 0.00 0.0000 7114.91 0.0000

50 36.58 6.24 2.66 0.0302 5625.45 0.0231 50 36.58 0.00 0.00 0.0000 5625.45 0.0000

60 26.58 4.53 1.93 0.0219 4555.43 0.0187 60 26.58 0.00 0.00 0.0000 4555.43 0.0000

80 15.87 2.71 1.15 0.0131 3163.52 0.0130 80 15.87 0.00 0.00 0.0000 3163.52 0.0000

100 10.55 1.80 0.77 0.0087 2329.10 0.0096 100 10.55 0.00 0.00 0.0000 2329.10 0.0000

150 4.95 0.84 0.36 0.0041 1281.78 0.0053 150 4.95 0.00 0.00 0.0000 1281.78 0.0000

200 2.86 0.49 0.21 0.0024 820.22 0.0034 200 2.86 0.00 0.00 0.0000 820.22 0.0000

250 1.87 0.32 0.14 0.0015 575.61 0.0024 250 1.87 0.00 0.00 0.0000 575.61 0.0000

500 0.49 0.08 0.04 0.0004 189.47 0.0008 500 0.49 0.00 0.00 0.0000 189.47 0.0000

1000 0.14 0.02 0.01 0.0001 64.58 0.0003 1000 0.14 0.00 0.00 0.0000 64.58 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0644

Ann Rate [g/s]: 0.0226

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 161.57 7.30 3.11 0.0057 12417.79 0.0000 20 34.85 14.84 0.1391 0.0511

30 86.18 3.90 1.66 0.0030 9254.67 0.0000 30 18.59 7.91 0.0742 0.0381

40 53.59 2.42 1.03 0.0019 7114.91 0.0000 40 11.56 4.92 0.0461 0.0293

50 36.58 1.65 0.70 0.0013 5625.45 0.0000 50 7.89 3.36 0.0315 0.0231

60 26.58 1.20 0.51 0.0009 4555.43 0.0000 60 5.73 2.44 0.0229 0.0187

80 15.87 0.72 0.31 0.0006 3163.52 0.0000 80 3.42 1.46 0.0137 0.0130

100 10.55 0.48 0.20 0.0004 2329.10 0.0000 100 2.28 0.97 0.0091 0.0096

150 4.95 0.22 0.10 0.0002 1281.78 0.0000 150 1.07 0.45 0.0043 0.0053

200 2.86 0.13 0.06 0.0001 820.22 0.0000 200 0.62 0.26 0.0025 0.0034

250 1.87 0.08 0.04 0.0001 575.61 0.0000 250 0.40 0.17 0.0016 0.0024

500 0.49 0.02 0.01 1.7E-05 189.47 0.0000 500 0.11 0.04 0.0004 0.0008

1000 0.14 0.01 0.00 4.9E-06 64.58 0.0000 1000 0.03 0.01 0.0001 0.0003

D-66
Facility G-01 - 94% Perc

Met Set: Mather

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1407 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0494 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 96.52 28.13 11.98 0.1362 8470.50 0.0596 20 96.52 0.00 0.00 0.0000 8470.50 0.0000

30 50.95 14.85 6.32 0.0719 5762.29 0.0405 30 50.95 0.00 0.00 0.0000 5762.29 0.0000

40 31.40 9.15 3.90 0.0443 4464.60 0.0314 40 31.40 0.00 0.00 0.0000 4464.60 0.0000

50 21.29 6.21 2.64 0.0300 3545.55 0.0249 50 21.29 0.00 0.00 0.0000 3545.55 0.0000

60 15.38 4.48 1.91 0.0217 2878.60 0.0203 60 15.38 0.00 0.00 0.0000 2878.60 0.0000

80 9.10 2.65 1.13 0.0128 2004.05 0.0141 80 9.10 0.00 0.00 0.0000 2004.05 0.0000

100 6.00 1.75 0.74 0.0085 1477.56 0.0104 100 6.00 0.00 0.00 0.0000 1477.56 0.0000

150 2.78 0.81 0.34 0.0039 819.70 0.0058 150 2.78 0.00 0.00 0.0000 819.70 0.0000

200 1.60 0.47 0.20 0.0023 527.32 0.0037 200 1.60 0.00 0.00 0.0000 527.32 0.0000

250 1.03 0.30 0.13 0.0015 371.22 0.0026 250 1.03 0.00 0.00 0.0000 371.22 0.0000

500 0.27 0.08 0.03 0.0004 122.78 0.0009 500 0.27 0.00 0.00 0.0000 122.78 0.0000

1000 0.07 0.02 0.01 0.0001 41.91 0.0003 1000 0.07 0.00 0.00 0.0000 41.91 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 96.52 0.00 0.00 0.0000 8470.50 0.0000 20 28.13 11.98 0.1362 0.0596

30 50.95 0.00 0.00 0.0000 5762.29 0.0000 30 14.85 6.32 0.0719 0.0405

40 31.40 0.00 0.00 0.0000 4464.60 0.0000 40 9.15 3.90 0.0443 0.0314

50 21.29 0.00 0.00 0.0000 3545.55 0.0000 50 6.21 2.64 0.0300 0.0249

60 15.38 0.00 0.00 0.0000 2878.60 0.0000 60 4.48 1.91 0.0217 0.0203

80 9.10 0.00 0.00 0.0000 2004.05 0.0000 80 2.65 1.13 0.0128 0.0141

100 6.00 0.00 0.00 0.0000 1477.56 0.0000 100 1.75 0.74 0.0085 0.0104

150 2.78 0.00 0.00 0.0000 819.70 0.0000 150 0.81 0.34 0.0039 0.0058

200 1.60 0.00 0.00 0.0000 527.32 0.0000 200 0.47 0.20 0.0023 0.0037

250 1.03 0.00 0.00 0.0000 371.22 0.0000 250 0.30 0.13 0.0015 0.0026

500 0.27 0.00 0.00 0.0000 122.78 0.0000 500 0.08 0.03 0.0004 0.0009

1000 0.07 0.00 0.00 0.0000 41.91 0.0000 1000 0.02 0.01 0.0001 0.0003

D-67
Facility G-01 - 55% Perc, 25% MeCl

Met Set: Mather

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0823 op hrs/wk: 57 Acu Rate [g/s]: 0.0374

Ann Rate [g/s]: 0.0289 Ann Rate [g/s]: 0.0131

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 96.52 16.46 7.01 0.0797 8470.50 0.0349 20 96.52 1.26 0.54 0.0004 8470.50 0.0226

30 50.95 8.69 3.70 0.0421 5762.29 0.0237 30 50.95 0.67 0.28 0.0002 5762.29 0.0154

40 31.40 5.35 2.28 0.0259 4464.60 0.0184 40 31.40 0.41 0.18 0.0001 4464.60 0.0119

50 21.29 3.63 1.55 0.0176 3545.55 0.0146 50 21.29 0.28 0.12 0.0001 3545.55 0.0095

60 15.38 2.62 1.12 0.0127 2878.60 0.0118 60 15.38 0.20 0.09 0.0001 2878.60 0.0077

80 9.10 1.55 0.66 0.0075 2004.05 0.0082 80 9.10 0.12 0.05 4.0E-05 2004.05 0.0054

100 6.00 1.02 0.44 0.0050 1477.56 0.0061 100 6.00 0.08 0.03 2.6E-05 1477.56 0.0039

150 2.78 0.47 0.20 0.0023 819.70 0.0034 150 2.78 0.04 0.02 1.2E-05 819.70 0.0022

200 1.60 0.27 0.12 0.0013 527.32 0.0022 200 1.60 0.02 0.01 7.0E-06 527.32 0.0014

250 1.03 0.18 0.07 0.0009 371.22 0.0015 250 1.03 0.01 0.01 4.5E-06 371.22 0.0010

500 0.27 0.05 0.02 0.0002 122.78 0.0005 500 0.27 0.00 0.00 1.2E-06 122.78 0.0003

1000 0.07 0.01 0.01 0.0001 41.91 0.0002 1000 0.07 0.00 0.00 3.1E-07 41.91 1.1E-04

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 96.52 0.00 0.00 0.0000 8470.50 0.0000 20 17.72 7.54 0.0801 0.0575

30 50.95 0.00 0.00 0.0000 5762.29 0.0000 30 9.35 3.98 0.0423 0.0391

40 31.40 0.00 0.00 0.0000 4464.60 0.0000 40 5.77 2.45 0.0261 0.0303

50 21.29 0.00 0.00 0.0000 3545.55 0.0000 50 3.91 1.66 0.0177 0.0241

60 15.38 0.00 0.00 0.0000 2878.60 0.0000 60 2.82 1.20 0.0128 0.0195

80 9.10 0.00 0.00 0.0000 2004.05 0.0000 80 1.67 0.71 0.0076 0.0136

100 6.00 0.00 0.00 0.0000 1477.56 0.0000 100 1.10 0.47 0.0050 0.0100

150 2.78 0.00 0.00 0.0000 819.70 0.0000 150 0.51 0.22 0.0023 0.0056

200 1.60 0.00 0.00 0.0000 527.32 0.0000 200 0.29 0.13 0.0013 0.0036

250 1.03 0.00 0.00 0.0000 371.22 0.0000 250 0.19 0.08 0.0009 0.0025

500 0.27 0.00 0.00 0.0000 122.78 0.0000 500 0.05 0.02 0.0002 0.0008

1000 0.07 0.00 0.00 0.0000 41.91 0.0000 1000 0.01 0.01 0.0001 0.0003

D-68
Facility G-01 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Mather

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0599 op hrs/wk: 57 Acu Rate [g/s]: 0.0449

Ann Rate [g/s]: 0.0210 Ann Rate [g/s]: 0.0158

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 96.52 11.96 5.09 0.0579 8470.50 0.0254 20 96.52 1.53 0.65 0.0005 8470.50 0.0272

30 50.95 6.31 2.69 0.0306 5762.29 0.0173 30 50.95 0.81 0.34 0.0003 5762.29 0.0185

40 31.40 3.89 1.66 0.0188 4464.60 0.0134 40 31.40 0.50 0.21 0.0002 4464.60 0.0143

50 21.29 2.64 1.12 0.0128 3545.55 0.0106 50 21.29 0.34 0.14 0.0001 3545.55 0.0114

60 15.38 1.91 0.81 0.0092 2878.60 0.0086 60 15.38 0.24 0.10 0.0001 2878.60 0.0092

80 9.10 1.13 0.48 0.0055 2004.05 0.0060 80 9.10 0.14 0.06 4.8E-05 2004.05 0.0064

100 6.00 0.74 0.32 0.0036 1477.56 0.0044 100 6.00 0.09 0.04 3.2E-05 1477.56 0.0047

150 2.78 0.34 0.15 0.0017 819.70 0.0025 150 2.78 0.04 0.02 1.5E-05 819.70 0.0026

200 1.60 0.20 0.08 0.0010 527.32 0.0016 200 1.60 0.03 0.01 8.4E-06 527.32 0.0017

250 1.03 0.13 0.05 0.0006 371.22 0.0011 250 1.03 0.02 0.01 5.4E-06 371.22 0.0012

500 0.27 0.03 0.01 0.0002 122.78 0.0004 500 0.27 0.00 0.00 1.4E-06 122.78 0.0004

1000 0.07 0.01 0.00 4.2E-05 41.91 0.0001 1000 0.07 0.00 0.00 3.7E-07 41.91 0.0001

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0299

Ann Rate [g/s]: 0.0105

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 96.52 2.03 0.86 0.0016 8470.50 0.0000 20 15.51 6.60 0.0600 0.0525

30 50.95 1.07 0.46 0.0008 5762.29 0.0000 30 8.19 3.49 0.0317 0.0357

40 31.40 0.66 0.28 0.0005 4464.60 0.0000 40 5.05 2.15 0.0195 0.0277

50 21.29 0.45 0.19 0.0003 3545.55 0.0000 50 3.42 1.46 0.0132 0.0220

60 15.38 0.32 0.14 0.0003 2878.60 0.0000 60 2.47 1.05 0.0096 0.0179

80 9.10 0.19 0.08 0.0001 2004.05 0.0000 80 1.46 0.62 0.0057 0.0124

100 6.00 0.13 0.05 0.0001 1477.56 0.0000 100 0.96 0.41 0.0037 0.0092

150 2.78 0.06 0.02 4.6E-05 819.70 0.0000 150 0.45 0.19 0.0017 0.0051

200 1.60 0.03 0.01 2.6E-05 527.32 0.0000 200 0.26 0.11 0.0010 0.0033

250 1.03 0.02 0.01 1.7E-05 371.22 0.0000 250 0.17 0.07 0.0006 0.0023

500 0.27 0.01 0.00 4.4E-06 122.78 0.0000 500 0.04 0.02 0.0002 0.0008

1000 0.07 0.00 0.00 1.1E-06 41.91 0.0000 1000 0.01 0.00 4.4E-05 0.0003

D-69
Facility G-01 - 55% Perc, 43% TCE

Met Set: Mather

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0823 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0289 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 96.52 16.46 7.01 0.0797 8470.50 0.0349 20 96.52 0.00 0.00 0.0000 8470.50 0.0000

30 50.95 8.69 3.70 0.0421 5762.29 0.0237 30 50.95 0.00 0.00 0.0000 5762.29 0.0000

40 31.40 5.35 2.28 0.0259 4464.60 0.0184 40 31.40 0.00 0.00 0.0000 4464.60 0.0000

50 21.29 3.63 1.55 0.0176 3545.55 0.0146 50 21.29 0.00 0.00 0.0000 3545.55 0.0000

60 15.38 2.62 1.12 0.0127 2878.60 0.0118 60 15.38 0.00 0.00 0.0000 2878.60 0.0000

80 9.10 1.55 0.66 0.0075 2004.05 0.0082 80 9.10 0.00 0.00 0.0000 2004.05 0.0000

100 6.00 1.02 0.44 0.0050 1477.56 0.0061 100 6.00 0.00 0.00 0.0000 1477.56 0.0000

150 2.78 0.47 0.20 0.0023 819.70 0.0034 150 2.78 0.00 0.00 0.0000 819.70 0.0000

200 1.60 0.27 0.12 0.0013 527.32 0.0022 200 1.60 0.00 0.00 0.0000 527.32 0.0000

250 1.03 0.18 0.07 0.0009 371.22 0.0015 250 1.03 0.00 0.00 0.0000 371.22 0.0000

500 0.27 0.05 0.02 0.0002 122.78 0.0005 500 0.27 0.00 0.00 0.0000 122.78 0.0000

1000 0.07 0.01 0.01 0.0001 41.91 0.0002 1000 0.07 0.00 0.00 0.0000 41.91 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0644

Ann Rate [g/s]: 0.0226

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 96.52 4.36 1.86 0.0034 8470.50 0.0000 20 20.82 8.86 0.0831 0.0349

30 50.95 2.30 0.98 0.0018 5762.29 0.0000 30 10.99 4.68 0.0439 0.0237

40 31.40 1.42 0.60 0.0011 4464.60 0.0000 40 6.77 2.88 0.0270 0.0184

50 21.29 0.96 0.41 0.0008 3545.55 0.0000 50 4.59 1.95 0.0183 0.0146

60 15.38 0.70 0.30 0.0005 2878.60 0.0000 60 3.32 1.41 0.0132 0.0118

80 9.10 0.41 0.18 0.0003 2004.05 0.0000 80 1.96 0.84 0.0078 0.0082

100 6.00 0.27 0.12 0.0002 1477.56 0.0000 100 1.29 0.55 0.0052 0.0061

150 2.78 0.13 0.05 0.0001 819.70 0.0000 150 0.60 0.26 0.0024 0.0034

200 1.60 0.07 0.03 0.0001 527.32 0.0000 200 0.35 0.15 0.0014 0.0022

250 1.03 0.05 0.02 3.6E-05 371.22 0.0000 250 0.22 0.09 0.0009 0.0015

500 0.27 0.01 0.01 9.5E-06 122.78 0.0000 500 0.06 0.02 0.0002 0.0005

1000 0.07 0.00 0.00 2.5E-06 41.91 0.0000 1000 0.02 0.01 0.0001 0.0002

D-70
Facility G-01 - 94% Perc

Met Set: Default -0

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1407 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0494 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 307.03 89.49 38.09 0.4334 11342.73 0.0798 20 307.03 0.00 0.00 0.0000 11342.73 0.0000

30 229.98 67.03 28.53 0.3246 8496.33 0.0598 30 229.98 0.00 0.00 0.0000 8496.33 0.0000

40 178.09 51.91 22.09 0.2514 6579.11 0.0463 40 178.09 0.00 0.00 0.0000 6579.11 0.0000

50 141.80 41.33 17.59 0.2001 5238.72 0.0369 50 141.80 0.00 0.00 0.0000 5238.72 0.0000

60 115.56 33.68 14.34 0.1631 4269.33 0.0300 60 115.56 0.00 0.00 0.0000 4269.33 0.0000

80 81.09 23.64 10.06 0.1145 2995.85 0.0211 80 81.09 0.00 0.00 0.0000 2995.85 0.0000

100 60.18 17.54 7.47 0.0849 2223.11 0.0156 100 60.18 0.00 0.00 0.0000 2223.11 0.0000

150 33.55 9.78 4.16 0.0473 1239.31 0.0087 150 33.55 0.00 0.00 0.0000 1239.31 0.0000

200 21.63 6.30 2.68 0.0305 799.09 0.0056 200 21.63 0.00 0.00 0.0000 799.09 0.0000

250 15.25 4.45 1.89 0.0215 563.57 0.0040 250 15.25 0.00 0.00 0.0000 563.57 0.0000

500 5.08 1.48 0.63 0.0072 187.51 0.0013 500 5.08 0.00 0.00 0.0000 187.51 0.0000

1000 1.74 0.51 0.22 0.0025 64.26 0.0005 1000 1.74 0.00 0.00 0.0000 64.26 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 307.03 0.00 0.00 0.0000 11342.73 0.0000 20 89.49 38.09 0.4334 0.0798

30 229.98 0.00 0.00 0.0000 8496.33 0.0000 30 67.03 28.53 0.3246 0.0598

40 178.09 0.00 0.00 0.0000 6579.11 0.0000 40 51.91 22.09 0.2514 0.0463

50 141.80 0.00 0.00 0.0000 5238.72 0.0000 50 41.33 17.59 0.2001 0.0369

60 115.56 0.00 0.00 0.0000 4269.33 0.0000 60 33.68 14.34 0.1631 0.0300

80 81.09 0.00 0.00 0.0000 2995.85 0.0000 80 23.64 10.06 0.1145 0.0211

100 60.18 0.00 0.00 0.0000 2223.11 0.0000 100 17.54 7.47 0.0849 0.0156

150 33.55 0.00 0.00 0.0000 1239.31 0.0000 150 9.78 4.16 0.0473 0.0087

200 21.63 0.00 0.00 0.0000 799.09 0.0000 200 6.30 2.68 0.0305 0.0056

250 15.25 0.00 0.00 0.0000 563.57 0.0000 250 4.45 1.89 0.0215 0.0040

500 5.08 0.00 0.00 0.0000 187.51 0.0000 500 1.48 0.63 0.0072 0.0013

1000 1.74 0.00 0.00 0.0000 64.26 0.0000 1000 0.51 0.22 0.0025 0.0005

D-71
Facility G-01 - 55% Perc, 25% MeCl

Met Set: Default -0

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0823 op hrs/wk: 57 Acu Rate [g/s]: 0.0374

Ann Rate [g/s]: 0.0289 Ann Rate [g/s]: 0.0131

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 307.03 52.35 22.29 0.2535 11342.73 0.0467 20 307.03 4.02 1.71 0.0013 11342.73 0.0303

30 229.98 39.21 16.69 0.1899 8496.33 0.0350 30 229.98 3.01 1.28 0.0010 8496.33 0.0227

40 178.09 30.37 12.93 0.1470 6579.11 0.0271 40 178.09 2.33 0.99 0.0008 6579.11 0.0176

50 141.80 24.18 10.29 0.1171 5238.72 0.0216 50 141.80 1.86 0.79 0.0006 5238.72 0.0140

60 115.56 19.70 8.39 0.0954 4269.33 0.0176 60 115.56 1.51 0.64 0.0005 4269.33 0.0114

80 81.09 13.83 5.89 0.0670 2995.85 0.0123 80 81.09 1.06 0.45 0.0004 2995.85 0.0080

100 60.18 10.26 4.37 0.0497 2223.11 0.0091 100 60.18 0.79 0.34 0.0003 2223.11 0.0059

150 33.55 5.72 2.43 0.0277 1239.31 0.0051 150 33.55 0.44 0.19 0.0001 1239.31 0.0033

200 21.63 3.69 1.57 0.0179 799.09 0.0033 200 21.63 0.28 0.12 0.0001 799.09 0.0021

250 15.25 2.60 1.11 0.0126 563.57 0.0023 250 15.25 0.20 0.09 0.0001 563.57 0.0015

500 5.08 0.87 0.37 0.0042 187.51 0.0008 500 5.08 0.07 0.03 2.2E-05 187.51 0.0005

1000 1.74 0.30 0.13 0.0014 64.26 0.0003 1000 1.74 0.02 0.01 7.6E-06 64.26 0.0002

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 307.03 0.00 0.00 0.0000 11342.73 0.0000 20 56.37 24.00 0.2549 0.0770

30 229.98 0.00 0.00 0.0000 8496.33 0.0000 30 42.23 17.98 0.1909 0.0577

40 178.09 0.00 0.00 0.0000 6579.11 0.0000 40 32.70 13.92 0.1478 0.0446

50 141.80 0.00 0.00 0.0000 5238.72 0.0000 50 26.04 11.08 0.1177 0.0356

60 115.56 0.00 0.00 0.0000 4269.33 0.0000 60 21.22 9.03 0.0959 0.0290

80 81.09 0.00 0.00 0.0000 2995.85 0.0000 80 14.89 6.34 0.0673 0.0203

100 60.18 0.00 0.00 0.0000 2223.11 0.0000 100 11.05 4.70 0.0500 0.0151

150 33.55 0.00 0.00 0.0000 1239.31 0.0000 150 6.16 2.62 0.0278 0.0084

200 21.63 0.00 0.00 0.0000 799.09 0.0000 200 3.97 1.69 0.0180 0.0054

250 15.25 0.00 0.00 0.0000 563.57 0.0000 250 2.80 1.19 0.0127 0.0038

500 5.08 0.00 0.00 0.0000 187.51 0.0000 500 0.93 0.40 0.0042 0.0013

1000 1.74 0.00 0.00 0.0000 64.26 0.0000 1000 0.32 0.14 0.0014 0.0004

D-72
Facility G-01 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Default -0

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0599 op hrs/wk: 57 Acu Rate [g/s]: 0.0449

Ann Rate [g/s]: 0.0210 Ann Rate [g/s]: 0.0158

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 307.03 38.04 16.19 0.1842 11342.73 0.0340 20 307.03 4.85 2.07 0.0016 11342.73 0.0364

30 229.98 28.49 12.13 0.1380 8496.33 0.0254 30 229.98 3.63 1.55 0.0012 8496.33 0.0272

40 178.09 22.06 9.39 0.1069 6579.11 0.0197 40 178.09 2.81 1.20 0.0009 6579.11 0.0211

50 141.80 17.57 7.48 0.0851 5238.72 0.0157 50 141.80 2.24 0.95 0.0007 5238.72 0.0168

60 115.56 14.32 6.10 0.0693 4269.33 0.0128 60 115.56 1.83 0.78 0.0006 4269.33 0.0137

80 81.09 10.05 4.28 0.0487 2995.85 0.0090 80 81.09 1.28 0.55 0.0004 2995.85 0.0096

100 60.18 7.46 3.17 0.0361 2223.11 0.0067 100 60.18 0.95 0.40 0.0003 2223.11 0.0071

150 33.55 4.16 1.77 0.0201 1239.31 0.0037 150 33.55 0.53 0.23 0.0002 1239.31 0.0040

200 21.63 2.68 1.14 0.0130 799.09 0.0024 200 21.63 0.34 0.15 0.0001 799.09 0.0026

250 15.25 1.89 0.80 0.0092 563.57 0.0017 250 15.25 0.24 0.10 0.0001 563.57 0.0018

500 5.08 0.63 0.27 0.0030 187.51 0.0006 500 5.08 0.08 0.03 2.7E-05 187.51 0.0006

1000 1.74 0.22 0.09 0.0010 64.26 0.0002 1000 1.74 0.03 0.01 9.2E-06 64.26 0.0002

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0299

Ann Rate [g/s]: 0.0105

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 307.03 6.45 2.74 0.0050 11342.73 0.0000 20 49.34 21.00 0.1909 0.0703

30 229.98 4.83 2.06 0.0038 8496.33 0.0000 30 36.96 15.73 0.1430 0.0527

40 178.09 3.74 1.59 0.0029 6579.11 0.0000 40 28.62 12.18 0.1107 0.0408

50 141.80 2.98 1.27 0.0023 5238.72 0.0000 50 22.79 9.70 0.0882 0.0325

60 115.56 2.43 1.03 0.0019 4269.33 0.0000 60 18.57 7.91 0.0718 0.0265

80 81.09 1.70 0.72 0.0013 2995.85 0.0000 80 13.03 5.55 0.0504 0.0186

100 60.18 1.26 0.54 0.0010 2223.11 0.0000 100 9.67 4.12 0.0374 0.0138

150 33.55 0.70 0.30 0.0006 1239.31 0.0000 150 5.39 2.29 0.0209 0.0077

200 21.63 0.45 0.19 0.0004 799.09 0.0000 200 3.48 1.48 0.0134 0.0050

250 15.25 0.32 0.14 0.0003 563.57 0.0000 250 2.45 1.04 0.0095 0.0035

500 5.08 0.11 0.05 0.0001 187.51 0.0000 500 0.82 0.35 0.0032 0.0012

1000 1.74 0.04 0.02 2.9E-05 64.26 0.0000 1000 0.28 0.12 0.0011 0.0004

D-73
Facility G-01 - 55% Perc, 43% TCE

Met Set: Default -0

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0823 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0289 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 307.03 52.35 22.29 0.2535 11342.73 0.0467 20 307.03 0.00 0.00 0.0000 11342.73 0.0000

30 229.98 39.21 16.69 0.1899 8496.33 0.0350 30 229.98 0.00 0.00 0.0000 8496.33 0.0000

40 178.09 30.37 12.93 0.1470 6579.11 0.0271 40 178.09 0.00 0.00 0.0000 6579.11 0.0000

50 141.80 24.18 10.29 0.1171 5238.72 0.0216 50 141.80 0.00 0.00 0.0000 5238.72 0.0000

60 115.56 19.70 8.39 0.0954 4269.33 0.0176 60 115.56 0.00 0.00 0.0000 4269.33 0.0000

80 81.09 13.83 5.89 0.0670 2995.85 0.0123 80 81.09 0.00 0.00 0.0000 2995.85 0.0000

100 60.18 10.26 4.37 0.0497 2223.11 0.0091 100 60.18 0.00 0.00 0.0000 2223.11 0.0000

150 33.55 5.72 2.43 0.0277 1239.31 0.0051 150 33.55 0.00 0.00 0.0000 1239.31 0.0000

200 21.63 3.69 1.57 0.0179 799.09 0.0033 200 21.63 0.00 0.00 0.0000 799.09 0.0000

250 15.25 2.60 1.11 0.0126 563.57 0.0023 250 15.25 0.00 0.00 0.0000 563.57 0.0000

500 5.08 0.87 0.37 0.0042 187.51 0.0008 500 5.08 0.00 0.00 0.0000 187.51 0.0000

1000 1.74 0.30 0.13 0.0014 64.26 0.0003 1000 1.74 0.00 0.00 0.0000 64.26 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0644

Ann Rate [g/s]: 0.0226

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 307.03 13.88 5.91 0.0108 11342.73 0.0000 20 66.23 28.19 0.2644 0.0467

30 229.98 10.40 4.43 0.0081 8496.33 0.0000 30 49.61 21.12 0.1980 0.0350

40 178.09 8.05 3.43 0.0063 6579.11 0.0000 40 38.42 16.35 0.1533 0.0271

50 141.80 6.41 2.73 0.0050 5238.72 0.0000 50 30.59 13.02 0.1221 0.0216

60 115.56 5.22 2.22 0.0041 4269.33 0.0000 60 24.93 10.61 0.0995 0.0176

80 81.09 3.67 1.56 0.0029 2995.85 0.0000 80 17.49 7.45 0.0698 0.0123

100 60.18 2.72 1.16 0.0021 2223.11 0.0000 100 12.98 5.53 0.0518 0.0091

150 33.55 1.52 0.65 0.0012 1239.31 0.0000 150 7.24 3.08 0.0289 0.0051

200 21.63 0.98 0.42 0.0008 799.09 0.0000 200 4.67 1.99 0.0186 0.0033

250 15.25 0.69 0.29 0.0005 563.57 0.0000 250 3.29 1.40 0.0131 0.0023

500 5.08 0.23 0.10 0.0002 187.51 0.0000 500 1.09 0.47 0.0044 0.0008

1000 1.74 0.08 0.03 0.0001 64.26 0.0000 1000 0.38 0.16 0.0015 0.0003

D-74
Risk Assessment Summary - 3 Generic Facilities

Multicomponent Impacts - Brake Cleaners - Chronic/Cancer

Facility G-02 - 94% Perc

Met Set: Burbank

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 97.87 85.52 36.40 0.4141 5528.38 0.0778 20 97.87 0.00 0.00 0.0000 5528.38 0.0000

30 71.96 62.88 26.77 0.3045 4845.41 0.0682 30 71.96 0.00 0.00 0.0000 4845.41 0.0000

40 46.45 40.59 17.28 0.1965 4048.28 0.0570 40 46.45 0.00 0.00 0.0000 4048.28 0.0000

50 32.37 28.28 12.04 0.1370 3418.07 0.0481 50 32.37 0.00 0.00 0.0000 3418.07 0.0000

60 23.83 20.82 8.86 0.1008 2918.05 0.0411 60 23.83 0.00 0.00 0.0000 2918.05 0.0000

80 14.48 12.65 5.39 0.0613 2193.50 0.0309 80 14.48 0.00 0.00 0.0000 2193.50 0.0000

100 9.73 8.50 3.62 0.0412 1708.42 0.0240 100 9.73 0.00 0.00 0.0000 1708.42 0.0000

150 4.64 4.05 1.73 0.0196 1026.40 0.0144 150 4.64 0.00 0.00 0.0000 1026.40 0.0000

200 2.71 2.37 1.01 0.0115 690.62 0.0097 200 2.71 0.00 0.00 0.0000 690.62 0.0000

250 1.77 1.55 0.66 0.0075 500.60 0.0070 250 1.77 0.00 0.00 0.0000 500.60 0.0000

500 0.47 0.41 0.17 0.0020 176.69 0.0025 500 0.47 0.00 0.00 0.0000 176.69 0.0000

1000 0.12 0.10 0.04 0.0005 62.47 0.0009 1000 0.12 0.00 0.00 0.0000 62.47 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 97.87 0.00 0.00 0.0000 5528.38 0.0000 20 85.52 36.40 0.4141 0.0778

30 71.96 0.00 0.00 0.0000 4845.41 0.0000 30 62.88 26.77 0.3045 0.0682

40 46.45 0.00 0.00 0.0000 4048.28 0.0000 40 40.59 17.28 0.1965 0.0570

50 32.37 0.00 0.00 0.0000 3418.07 0.0000 50 28.28 12.04 0.1370 0.0481

60 23.83 0.00 0.00 0.0000 2918.05 0.0000 60 20.82 8.86 0.1008 0.0411

80 14.48 0.00 0.00 0.0000 2193.50 0.0000 80 12.65 5.39 0.0613 0.0309

100 9.73 0.00 0.00 0.0000 1708.42 0.0000 100 8.50 3.62 0.0412 0.0240

150 4.64 0.00 0.00 0.0000 1026.40 0.0000 150 4.05 1.73 0.0196 0.0144

200 2.71 0.00 0.00 0.0000 690.62 0.0000 200 2.37 1.01 0.0115 0.0097

250 1.77 0.00 0.00 0.0000 500.60 0.0000 250 1.55 0.66 0.0075 0.0070

500 0.47 0.00 0.00 0.0000 176.69 0.0000 500 0.41 0.17 0.0020 0.0025

1000 0.12 0.00 0.00 0.0000 62.47 0.0000 1000 0.10 0.04 0.0005 0.0009

D-75
Facility G-02 - 55% Perc, 25% MeCl

Met Set: Burbank

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0.0749

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0.0394

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 97.87 50.06 21.31 0.2424 5528.38 0.0455 20 97.87 3.86 1.64 0.0013 5528.38 0.0296

30 71.96 36.81 15.67 0.1783 4845.41 0.0399 30 71.96 2.84 1.21 0.0009 4845.41 0.0259

40 46.45 23.76 10.11 0.1151 4048.28 0.0333 40 46.45 1.83 0.78 0.0006 4048.28 0.0217

50 32.37 16.56 7.05 0.0802 3418.07 0.0281 50 32.37 1.28 0.54 0.0004 3418.07 0.0183

60 23.83 12.19 5.19 0.0590 2918.05 0.0240 60 23.83 0.94 0.40 0.0003 2918.05 0.0156

80 14.48 7.41 3.15 0.0359 2193.50 0.0181 80 14.48 0.57 0.24 0.0002 2193.50 0.0117

100 9.73 4.98 2.12 0.0241 1708.42 0.0141 100 9.73 0.38 0.16 0.0001 1708.42 0.0091

150 4.64 2.37 1.01 0.0115 1026.40 0.0085 150 4.64 0.18 0.08 0.0001 1026.40 0.0055

200 2.71 1.39 0.59 0.0067 690.62 0.0057 200 2.71 0.11 0.05 0.0000 690.62 0.0037

250 1.77 0.91 0.39 0.0044 500.60 0.0041 250 1.77 0.07 0.03 0.0000 500.60 0.0027

500 0.47 0.24 0.10 0.0012 176.69 0.0015 500 0.47 0.02 0.01 0.0000 176.69 0.0009

1000 0.12 0.06 0.03 0.0003 62.47 0.0005 1000 0.12 0.00 0.00 0.0000 62.47 0.0003

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 97.87 0.00 0.00 0.0000 5528.38 0.0000 20 53.92 22.95 0.2437 0.0751

30 71.96 0.00 0.00 0.0000 4845.41 0.0000 30 39.64 16.88 0.1792 0.0658

40 46.45 0.00 0.00 0.0000 4048.28 0.0000 40 25.59 10.89 0.1157 0.0550

50 32.37 0.00 0.00 0.0000 3418.07 0.0000 50 17.83 7.59 0.0806 0.0464

60 23.83 0.00 0.00 0.0000 2918.05 0.0000 60 13.13 5.59 0.0593 0.0396

80 14.48 0.00 0.00 0.0000 2193.50 0.0000 80 7.98 3.40 0.0361 0.0298

100 9.73 0.00 0.00 0.0000 1708.42 0.0000 100 5.36 2.28 0.0242 0.0232

150 4.64 0.00 0.00 0.0000 1026.40 0.0000 150 2.56 1.09 0.0116 0.0139

200 2.71 0.00 0.00 0.0000 690.62 0.0000 200 1.49 0.64 0.0067 0.0094

250 1.77 0.00 0.00 0.0000 500.60 0.0000 250 0.98 0.42 0.0044 0.0068

500 0.47 0.00 0.00 0.0000 176.69 0.0000 500 0.26 0.11 0.0012 0.0024

1000 0.12 0.00 0.00 0.0000 62.47 0.0000 1000 0.07 0.03 0.0003 0.0008

D-76
Facility G-02 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Burbank

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1198 op hrs/wk: 57 Acu Rate [g/s]: 0.0898

Ann Rate [g/s]: 0.0630 Ann Rate [g/s]: 0.0473

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 97.87 36.38 15.49 0.1762 5528.38 0.0331 20 97.87 4.63 1.97 0.0015 5528.38 0.0355

30 71.96 26.75 11.39 0.1295 4845.41 0.0290 30 71.96 3.40 1.45 0.0011 4845.41 0.0311

40 46.45 17.27 7.35 0.0836 4048.28 0.0242 40 46.45 2.20 0.94 0.0007 4048.28 0.0260

50 32.37 12.03 5.12 0.0583 3418.07 0.0205 50 32.37 1.53 0.65 0.0005 3418.07 0.0219

60 23.83 8.86 3.77 0.0429 2918.05 0.0175 60 23.83 1.13 0.48 0.0004 2918.05 0.0187

80 14.48 5.38 2.29 0.0261 2193.50 0.0131 80 14.48 0.68 0.29 0.0002 2193.50 0.0141

100 9.73 3.62 1.54 0.0175 1708.42 0.0102 100 9.73 0.46 0.20 0.0002 1708.42 0.0110

150 4.64 1.72 0.73 0.0084 1026.40 0.0061 150 4.64 0.22 0.09 0.0001 1026.40 0.0066

200 2.71 1.01 0.43 0.0049 690.62 0.0041 200 2.71 0.13 0.05 4.3E-05 690.62 0.0044

250 1.77 0.66 0.28 0.0032 500.60 0.0030 250 1.77 0.08 0.04 2.8E-05 500.60 0.0032

500 0.47 0.17 0.07 0.0008 176.69 0.0011 500 0.47 0.02 0.01 7.4E-06 176.69 0.0011

1000 0.12 0.04 0.02 0.0002 62.47 0.0004 1000 0.12 0.01 0.00 1.9E-06 62.47 0.0004

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0599

Ann Rate [g/s]: 0.0315

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 97.87 6.17 2.62 0.0048 5528.38 0.0000 20 47.17 20.08 0.1825 0.0686

30 71.96 4.53 1.93 0.0035 4845.41 0.0000 30 34.68 14.76 0.1342 0.0601

40 46.45 2.93 1.25 0.0023 4048.28 0.0000 40 22.39 9.53 0.0866 0.0502

50 32.37 2.04 0.87 0.0016 3418.07 0.0000 50 15.60 6.64 0.0604 0.0424

60 23.83 1.50 0.64 0.0012 2918.05 0.0000 60 11.49 4.89 0.0444 0.0362

80 14.48 0.91 0.39 0.0007 2193.50 0.0000 80 6.98 2.97 0.0270 0.0272

100 9.73 0.61 0.26 0.0005 1708.42 0.0000 100 4.69 2.00 0.0181 0.0212

150 4.64 0.29 0.12 0.0002 1026.40 0.0000 150 2.24 0.95 0.0087 0.0127

200 2.71 0.17 0.07 0.0001 690.62 0.0000 200 1.31 0.56 0.0051 0.0086

250 1.77 0.11 0.05 0.0001 500.60 0.0000 250 0.85 0.36 0.0033 0.0062

500 0.47 0.03 0.01 0.0 176.69 0.0000 500 0.23 0.10 0.0009 0.0022

1000 0.12 0.01 0.00 0.0 62.47 0.0000 1000 0.06 0.02 0.0002 0.0008

D-77
Facility G-02 - 55% Perc, 43% TCE

Met Set: Burbank

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 97.87 50.06 21.31 0.2424 5528.38 0.0455 20 97.87 0.00 0.00 0.0000 5528.38 0.0000

30 71.96 36.81 15.67 0.1783 4845.41 0.0399 30 71.96 0.00 0.00 0.0000 4845.41 0.0000

40 46.45 23.76 10.11 0.1151 4048.28 0.0333 40 46.45 0.00 0.00 0.0000 4048.28 0.0000

50 32.37 16.56 7.05 0.0802 3418.07 0.0281 50 32.37 0.00 0.00 0.0000 3418.07 0.0000

60 23.83 12.19 5.19 0.0590 2918.05 0.0240 60 23.83 0.00 0.00 0.0000 2918.05 0.0000

80 14.48 7.41 3.15 0.0359 2193.50 0.0181 80 14.48 0.00 0.00 0.0000 2193.50 0.0000

100 9.73 4.98 2.12 0.0241 1708.42 0.0141 100 9.73 0.00 0.00 0.0000 1708.42 0.0000

150 4.64 2.37 1.01 0.0115 1026.40 0.0085 150 4.64 0.00 0.00 0.0000 1026.40 0.0000

200 2.71 1.39 0.59 0.0067 690.62 0.0057 200 2.71 0.00 0.00 0.0000 690.62 0.0000

250 1.77 0.91 0.39 0.0044 500.60 0.0041 250 1.77 0.00 0.00 0.0000 500.60 0.0000

500 0.47 0.24 0.10 0.0012 176.69 0.0015 500 0.47 0.00 0.00 0.0000 176.69 0.0000

1000 0.12 0.06 0.03 0.0003 62.47 0.0005 1000 0.12 0.00 0.00 0.0000 62.47 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.1288

Ann Rate [g/s]: 0.0677

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 97.87 13.25 5.64 0.0104 5528.38 0.0000 20 63.32 26.95 0.2528 0.0455

30 71.96 9.74 4.15 0.0076 4845.41 0.0000 30 46.55 19.82 0.1859 0.0399

40 46.45 6.29 2.68 0.0049 4048.28 0.0000 40 30.05 12.79 0.1200 0.0333

50 32.37 4.38 1.87 0.0034 3418.07 0.0000 50 20.94 8.91 0.0836 0.0281

60 23.83 3.23 1.37 0.0025 2918.05 0.0000 60 15.42 6.56 0.0616 0.0240

80 14.48 1.96 0.83 0.0015 2193.50 0.0000 80 9.37 3.99 0.0374 0.0181

100 9.73 1.32 0.56 0.0010 1708.42 0.0000 100 6.29 2.68 0.0251 0.0141

150 4.64 0.63 0.27 0.0005 1026.40 0.0000 150 3.00 1.28 0.0120 0.0085

200 2.71 0.37 0.16 0.0003 690.62 0.0000 200 1.75 0.75 0.0070 0.0057

250 1.77 0.24 0.10 0.0002 500.60 0.0000 250 1.15 0.49 0.0046 0.0041

500 0.47 0.06 0.03 5.0E-05 176.69 0.0000 500 0.30 0.13 0.0012 0.0015

1000 0.12 0.02 0.01 1.3E-05 62.47 0.0000 1000 0.08 0.03 0.0003 0.0005

D-78
Facility G-02 - 94% Perc

Met Set: Anaheim

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 125.69 109.83 46.75 0.5318 5444.38 0.0766 20 125.69 0.00 0.00 0.0000 5444.38 0.0000

30 96.66 84.46 35.95 0.4090 4844.11 0.0682 30 96.66 0.00 0.00 0.0000 4844.11 0.0000

40 62.33 54.46 23.18 0.2637 4046.70 0.0570 40 62.33 0.00 0.00 0.0000 4046.70 0.0000

50 43.33 37.86 16.12 0.1833 3416.34 0.0481 50 43.33 0.00 0.00 0.0000 3416.34 0.0000

60 31.84 27.82 11.84 0.1347 2916.25 0.0410 60 31.84 0.00 0.00 0.0000 2916.25 0.0000

80 19.26 16.83 7.16 0.0815 2191.72 0.0308 80 19.26 0.00 0.00 0.0000 2191.72 0.0000

100 12.90 11.27 4.80 0.0546 1706.75 0.0240 100 12.90 0.00 0.00 0.0000 1706.75 0.0000

150 6.11 5.34 2.27 0.0259 1025.07 0.0144 150 6.11 0.00 0.00 0.0000 1025.07 0.0000

200 3.55 3.10 1.32 0.0150 689.56 0.0097 200 3.55 0.00 0.00 0.0000 689.56 0.0000

250 2.32 2.03 0.86 0.0098 499.75 0.0070 250 2.32 0.00 0.00 0.0000 499.75 0.0000

500 0.60 0.52 0.22 0.0025 176.33 0.0025 500 0.60 0.00 0.00 0.0000 176.33 0.0000

1000 0.16 0.14 0.06 0.0007 62.42 0.0009 1000 0.16 0.00 0.00 0.0000 62.42 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 125.69 0.00 0.00 0.0000 5444.38 0.0000 20 109.83 46.75 0.5318 0.0766

30 96.66 0.00 0.00 0.0000 4844.11 0.0000 30 84.46 35.95 0.4090 0.0682

40 62.33 0.00 0.00 0.0000 4046.70 0.0000 40 54.46 23.18 0.2637 0.0570

50 43.33 0.00 0.00 0.0000 3416.34 0.0000 50 37.86 16.12 0.1833 0.0481

60 31.84 0.00 0.00 0.0000 2916.25 0.0000 60 27.82 11.84 0.1347 0.0410

80 19.26 0.00 0.00 0.0000 2191.72 0.0000 80 16.83 7.16 0.0815 0.0308

100 12.90 0.00 0.00 0.0000 1706.75 0.0000 100 11.27 4.80 0.0546 0.0240

150 6.11 0.00 0.00 0.0000 1025.07 0.0000 150 5.34 2.27 0.0259 0.0144

200 3.55 0.00 0.00 0.0000 689.56 0.0000 200 3.10 1.32 0.0150 0.0097

250 2.32 0.00 0.00 0.0000 499.75 0.0000 250 2.03 0.86 0.0098 0.0070

500 0.60 0.00 0.00 0.0000 176.33 0.0000 500 0.52 0.22 0.0025 0.0025

1000 0.16 0.00 0.00 0.0000 62.42 0.0000 1000 0.14 0.06 0.0007 0.0009

D-79
Facility G-02 - 55% Perc, 25% MeCl

Met Set: Anaheim

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0.0749

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0.0394

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 125.69 64.29 27.37 0.3114 5444.38 0.0448 20 125.69 4.95 2.11 0.0017 5444.38 0.0291

30 96.66 49.44 21.05 0.2394 4844.11 0.0399 30 96.66 3.81 1.62 0.0013 4844.11 0.0259

40 62.33 31.88 13.57 0.1544 4046.70 0.0333 40 62.33 2.46 1.05 0.0008 4046.70 0.0216

50 43.33 22.16 9.44 0.1073 3416.34 0.0281 50 43.33 1.71 0.73 0.0006 3416.34 0.0183

60 31.84 16.29 6.93 0.0789 2916.25 0.0240 60 31.84 1.25 0.53 0.0004 2916.25 0.0156

80 19.26 9.85 4.19 0.0477 2191.72 0.0180 80 19.26 0.76 0.32 0.0003 2191.72 0.0117

100 12.90 6.60 2.81 0.0320 1706.75 0.0141 100 12.90 0.51 0.22 0.0002 1706.75 0.0091

150 6.11 3.13 1.33 0.0151 1025.07 0.0084 150 6.11 0.24 0.10 0.0001 1025.07 0.0055

200 3.55 1.82 0.77 0.0088 689.56 0.0057 200 3.55 0.14 0.06 4.7E-05 689.56 0.0037

250 2.32 1.19 0.51 0.0057 499.75 0.0041 250 2.32 0.09 0.04 3.0E-05 499.75 0.0027

500 0.60 0.31 0.13 0.0015 176.33 0.0015 500 0.60 0.02 0.01 7.9E-06 176.33 0.0009

1000 0.16 0.08 0.03 0.0004 62.42 0.0005 1000 0.16 0.01 0.00 2.1E-06 62.42 0.0003

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 125.69 0.00 0.00 0.0000 5444.38 0.0000 20 69.25 29.48 0.3130 0.0740

30 96.66 0.00 0.00 0.0000 4844.11 0.0000 30 53.25 22.67 0.2407 0.0658

40 62.33 0.00 0.00 0.0000 4046.70 0.0000 40 34.34 14.62 0.1552 0.0550

50 43.33 0.00 0.00 0.0000 3416.34 0.0000 50 23.87 10.16 0.1079 0.0464

60 31.84 0.00 0.00 0.0000 2916.25 0.0000 60 17.54 7.47 0.0793 0.0396

80 19.26 0.00 0.00 0.0000 2191.72 0.0000 80 10.61 4.52 0.0480 0.0298

100 12.90 0.00 0.00 0.0000 1706.75 0.0000 100 7.11 3.03 0.0321 0.0232

150 6.11 0.00 0.00 0.0000 1025.07 0.0000 150 3.37 1.43 0.0152 0.0139

200 3.55 0.00 0.00 0.0000 689.56 0.0000 200 1.96 0.83 0.0088 0.0094

250 2.32 0.00 0.00 0.0000 499.75 0.0000 250 1.28 0.54 0.0058 0.0068

500 0.60 0.00 0.00 0.0000 176.33 0.0000 500 0.33 0.14 0.0015 0.0024

1000 0.16 0.00 0.00 0.0000 62.42 0.0000 1000 0.09 0.04 0.0004 0.0008

D-80
Facility G-02 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Anaheim

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1198 op hrs/wk: 57 Acu Rate [g/s]: 0.0898

Ann Rate [g/s]: 0.0630 Ann Rate [g/s]: 0.0473

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 125.69 46.72 19.89 0.2262 5444.38 0.0326 20 125.69 5.95 2.53 0.0020 5444.38 0.0349

30 96.66 35.93 15.29 0.1740 4844.11 0.0290 30 96.66 4.57 1.95 0.0015 4844.11 0.0311

40 62.33 23.17 9.86 0.1122 4046.70 0.0242 40 62.33 2.95 1.25 0.0010 4046.70 0.0260

50 43.33 16.11 6.86 0.0780 3416.34 0.0205 50 43.33 2.05 0.87 0.0007 3416.34 0.0219

60 31.84 11.83 5.04 0.0573 2916.25 0.0175 60 31.84 1.51 0.64 0.0005 2916.25 0.0187

80 19.26 7.16 3.05 0.0347 2191.72 0.0131 80 19.26 0.91 0.39 0.0003 2191.72 0.0141

100 12.90 4.79 2.04 0.0232 1706.75 0.0102 100 12.90 0.61 0.26 0.0002 1706.75 0.0109

150 6.11 2.27 0.97 0.0110 1025.07 0.0061 150 6.11 0.29 0.12 0.0001 1025.07 0.0066

200 3.55 1.32 0.56 0.0064 689.56 0.0041 200 3.55 0.17 0.07 0.0001 689.56 0.0044

250 2.32 0.86 0.37 0.0042 499.75 0.0030 250 2.32 0.11 0.05 3.7E-05 499.75 0.0032

500 0.60 0.22 0.09 0.0011 176.33 0.0011 500 0.60 0.03 0.01 9.5E-06 176.33 0.0011

1000 0.16 0.06 0.03 0.0003 62.42 0.0004 1000 0.16 0.01 0.00 2.5E-06 62.42 0.0004

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0599

Ann Rate [g/s]: 0.0315

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 125.69 7.92 3.37 0.0062 5444.38 0.0000 20 60.58 25.79 0.2344 0.0675

30 96.66 6.09 2.59 0.0048 4844.11 0.0000 30 46.59 19.83 0.1803 0.0601

40 62.33 3.93 1.67 0.0031 4046.70 0.0000 40 30.04 12.79 0.1162 0.0502

50 43.33 2.73 1.16 0.0021 3416.34 0.0000 50 20.89 8.89 0.0808 0.0424

60 31.84 2.01 0.85 0.0016 2916.25 0.0000 60 15.35 6.53 0.0594 0.0362

80 19.26 1.21 0.52 0.0009 2191.72 0.0000 80 9.28 3.95 0.0359 0.0272

100 12.90 0.81 0.35 0.0006 1706.75 0.0000 100 6.22 2.65 0.0241 0.0212

150 6.11 0.38 0.16 0.0003 1025.07 0.0000 150 2.95 1.25 0.0114 0.0127

200 3.55 0.22 0.10 0.0002 689.56 0.0000 200 1.71 0.73 0.0066 0.0086

250 2.32 0.15 0.06 0.0001 499.75 0.0000 250 1.12 0.48 0.0043 0.0062

500 0.60 0.04 0.02 3.0E-05 176.33 0.0000 500 0.29 0.12 0.0011 0.0022

1000 0.16 0.01 0.00 7.9E-06 62.42 0.0000 1000 0.08 0.03 0.0003 0.0008

D-81
Facility G-02 - 55% Perc, 43% TCE

Met Set: Anaheim

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 125.69 64.29 27.37 0.3114 5444.38 0.0448 20 125.69 0.00 0.00 0.0000 5444.38 0.0000

30 96.66 49.44 21.05 0.2394 4844.11 0.0399 30 96.66 0.00 0.00 0.0000 4844.11 0.0000

40 62.33 31.88 13.57 0.1544 4046.70 0.0333 40 62.33 0.00 0.00 0.0000 4046.70 0.0000

50 43.33 22.16 9.44 0.1073 3416.34 0.0281 50 43.33 0.00 0.00 0.0000 3416.34 0.0000

60 31.84 16.29 6.93 0.0789 2916.25 0.0240 60 31.84 0.00 0.00 0.0000 2916.25 0.0000

80 19.26 9.85 4.19 0.0477 2191.72 0.0180 80 19.26 0.00 0.00 0.0000 2191.72 0.0000

100 12.90 6.60 2.81 0.0320 1706.75 0.0141 100 12.90 0.00 0.00 0.0000 1706.75 0.0000

150 6.11 3.13 1.33 0.0151 1025.07 0.0084 150 6.11 0.00 0.00 0.0000 1025.07 0.0000

200 3.55 1.82 0.77 0.0088 689.56 0.0057 200 3.55 0.00 0.00 0.0000 689.56 0.0000

250 2.32 1.19 0.51 0.0057 499.75 0.0041 250 2.32 0.00 0.00 0.0000 499.75 0.0000

500 0.60 0.31 0.13 0.0015 176.33 0.0015 500 0.60 0.00 0.00 0.0000 176.33 0.0000

1000 0.16 0.08 0.03 0.0004 62.42 0.0005 1000 0.16 0.00 0.00 0.0000 62.42 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.1288

Ann Rate [g/s]: 0.0677

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 125.69 17.02 7.24 0.0133 5444.38 0.0000 20 81.31 34.61 0.3246 0.0448

30 96.66 13.09 5.57 0.0102 4844.11 0.0000 30 62.53 26.62 0.2497 0.0399

40 62.33 8.44 3.59 0.0066 4046.70 0.0000 40 40.32 17.16 0.1610 0.0333

50 43.33 5.87 2.50 0.0046 3416.34 0.0000 50 28.03 11.93 0.1119 0.0281

60 31.84 4.31 1.84 0.0034 2916.25 0.0000 60 20.60 8.77 0.0822 0.0240

80 19.26 2.61 1.11 0.0020 2191.72 0.0000 80 12.46 5.30 0.0497 0.0180

100 12.90 1.75 0.74 0.0014 1706.75 0.0000 100 8.35 3.55 0.0333 0.0141

150 6.11 0.83 0.35 0.0006 1025.07 0.0000 150 3.95 1.68 0.0158 0.0084

200 3.55 0.48 0.20 0.0004 689.56 0.0000 200 2.30 0.98 0.0092 0.0057

250 2.32 0.31 0.13 0.0002 499.75 0.0000 250 1.50 0.64 0.0060 0.0041

500 0.60 0.08 0.03 0.0001 176.33 0.0000 500 0.39 0.17 0.0015 0.0015

1000 0.16 0.02 0.01 1.7E-05 62.42 0.0000 1000 0.10 0.04 0.0004 0.0005

D-82
Facility G-02 - 94% Perc

Met Set: Oakland

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 48.31 42.21 17.97 0.2044 4685.59 0.0659 20 48.31 0.00 0.00 0.0000 4685.59 0.0000

30 40.60 35.48 15.10 0.1718 4028.18 0.0567 30 40.60 0.00 0.00 0.0000 4028.18 0.0000

40 26.41 23.08 9.82 0.1118 3439.11 0.0484 40 26.41 0.00 0.00 0.0000 3439.11 0.0000

50 18.50 16.17 6.88 0.0783 2941.66 0.0414 50 18.50 0.00 0.00 0.0000 2941.66 0.0000

60 13.67 11.94 5.08 0.0578 2531.88 0.0356 60 13.67 0.00 0.00 0.0000 2531.88 0.0000

80 8.35 7.30 3.11 0.0353 1940.79 0.0273 80 8.35 0.00 0.00 0.0000 1940.79 0.0000

100 5.63 4.92 2.09 0.0238 1529.51 0.0215 100 5.63 0.00 0.00 0.0000 1529.51 0.0000

150 2.70 2.36 1.00 0.0114 931.70 0.0131 150 2.70 0.00 0.00 0.0000 931.70 0.0000

200 1.58 1.38 0.59 0.0067 629.79 0.0089 200 1.58 0.00 0.00 0.0000 629.79 0.0000

250 1.04 0.91 0.39 0.0044 457.07 0.0064 250 1.04 0.00 0.00 0.0000 457.07 0.0000

500 0.28 0.24 0.10 0.0012 160.49 0.0023 500 0.28 0.00 0.00 0.0000 160.49 0.0000

1000 0.07 0.06 0.03 0.0003 55.89 0.0008 1000 0.07 0.00 0.00 0.0000 55.89 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 48.31 0.00 0.00 0.0000 4685.59 0.0000 20 42.21 17.97 0.2044 0.0659

30 40.60 0.00 0.00 0.0000 4028.18 0.0000 30 35.48 15.10 0.1718 0.0567

40 26.41 0.00 0.00 0.0000 3439.11 0.0000 40 23.08 9.82 0.1118 0.0484

50 18.50 0.00 0.00 0.0000 2941.66 0.0000 50 16.17 6.88 0.0783 0.0414

60 13.67 0.00 0.00 0.0000 2531.88 0.0000 60 11.94 5.08 0.0578 0.0356

80 8.35 0.00 0.00 0.0000 1940.79 0.0000 80 7.30 3.11 0.0353 0.0273

100 5.63 0.00 0.00 0.0000 1529.51 0.0000 100 4.92 2.09 0.0238 0.0215

150 2.70 0.00 0.00 0.0000 931.70 0.0000 150 2.36 1.00 0.0114 0.0131

200 1.58 0.00 0.00 0.0000 629.79 0.0000 200 1.38 0.59 0.0067 0.0089

250 1.04 0.00 0.00 0.0000 457.07 0.0000 250 0.91 0.39 0.0044 0.0064

500 0.28 0.00 0.00 0.0000 160.49 0.0000 500 0.24 0.10 0.0012 0.0023

1000 0.07 0.00 0.00 0.0000 55.89 0.0000 1000 0.06 0.03 0.0003 0.0008

D-83
Facility G-02 - 55% Perc, 25% MeCl

Met Set: Oakland

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0.0749

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0.0394

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 48.31 24.71 10.52 0.1197 4685.59 0.0386 20 48.31 1.90 0.81 0.0006 4685.59 0.0251

30 40.60 20.77 8.84 0.1006 4028.18 0.0332 30 40.60 1.60 0.68 0.0005 4028.18 0.0216

40 26.41 13.51 5.75 0.0654 3439.11 0.0283 40 26.41 1.04 0.44 0.0003 3439.11 0.0184

50 18.50 9.46 4.03 0.0458 2941.66 0.0242 50 18.50 0.73 0.31 0.0002 2941.66 0.0157

60 13.67 6.99 2.98 0.0339 2531.88 0.0209 60 13.67 0.54 0.23 0.0002 2531.88 0.0135

80 8.35 4.27 1.82 0.0207 1940.79 0.0160 80 8.35 0.33 0.14 0.0001 1940.79 0.0104

100 5.63 2.88 1.23 0.0139 1529.51 0.0126 100 5.63 0.22 0.09 0.0001 1529.51 0.0082

150 2.70 1.38 0.59 0.0067 931.70 0.0077 150 2.70 0.11 0.05 3.5E-05 931.70 0.0050

200 1.58 0.81 0.34 0.0039 629.79 0.0052 200 1.58 0.06 0.03 2.1E-05 629.79 0.0034

250 1.04 0.53 0.23 0.0026 457.07 0.0038 250 1.04 0.04 0.02 1.4E-05 457.07 0.0024

500 0.28 0.14 0.06 0.0007 160.49 0.0013 500 0.28 0.01 0.00 3.7E-06 160.49 0.0009

1000 0.07 0.04 0.02 0.0002 55.89 0.0005 1000 0.07 0.00 0.00 9.2E-07 55.89 0.0003

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 48.31 0.00 0.00 0.0000 4685.59 0.0000 20 26.62 11.33 0.1203 0.0637

30 40.60 0.00 0.00 0.0000 4028.18 0.0000 30 22.37 9.52 0.1011 0.0547

40 26.41 0.00 0.00 0.0000 3439.11 0.0000 40 14.55 6.19 0.0658 0.0467

50 18.50 0.00 0.00 0.0000 2941.66 0.0000 50 10.19 4.34 0.0461 0.0400

60 13.67 0.00 0.00 0.0000 2531.88 0.0000 60 7.53 3.21 0.0340 0.0344

80 8.35 0.00 0.00 0.0000 1940.79 0.0000 80 4.60 1.96 0.0208 0.0264

100 5.63 0.00 0.00 0.0000 1529.51 0.0000 100 3.10 1.32 0.0140 0.0208

150 2.70 0.00 0.00 0.0000 931.70 0.0000 150 1.49 0.63 0.0067 0.0127

200 1.58 0.00 0.00 0.0000 629.79 0.0000 200 0.87 0.37 0.0039 0.0086

250 1.04 0.00 0.00 0.0000 457.07 0.0000 250 0.57 0.24 0.0026 0.0062

500 0.28 0.00 0.00 0.0000 160.49 0.0000 500 0.15 0.07 0.0007 0.0022

1000 0.07 0.00 0.00 0.0000 55.89 0.0000 1000 0.04 0.02 0.0002 0.0008

D-84
Facility G-02 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Oakland

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1198 op hrs/wk: 57 Acu Rate [g/s]: 0.0898

Ann Rate [g/s]: 0.0630 Ann Rate [g/s]: 0.0473

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 48.31 17.96 7.64 0.0870 4685.59 0.0281 20 48.31 2.29 0.97 0.0008 4685.59 0.0301

30 40.60 15.09 6.42 0.0731 4028.18 0.0241 30 40.60 1.92 0.82 0.0006 4028.18 0.0258

40 26.41 9.82 4.18 0.0475 3439.11 0.0206 40 26.41 1.25 0.53 0.0004 3439.11 0.0221

50 18.50 6.88 2.93 0.0333 2941.66 0.0176 50 18.50 0.88 0.37 0.0003 2941.66 0.0189

60 13.67 5.08 2.16 0.0246 2531.88 0.0152 60 13.67 0.65 0.28 0.0002 2531.88 0.0162

80 8.35 3.10 1.32 0.0150 1940.79 0.0116 80 8.35 0.39 0.17 0.0001 1940.79 0.0124

100 5.63 2.09 0.89 0.0101 1529.51 0.0092 100 5.63 0.27 0.11 0.0001 1529.51 0.0098

150 2.70 1.00 0.43 0.0049 931.70 0.0056 150 2.70 0.13 0.05 4.3E-05 931.70 0.0060

200 1.58 0.59 0.25 0.0028 629.79 0.0038 200 1.58 0.07 0.03 2.5E-05 629.79 0.0040

250 1.04 0.39 0.16 0.0019 457.07 0.0027 250 1.04 0.05 0.02 1.6E-05 457.07 0.0029

500 0.28 0.10 0.04 0.0005 160.49 0.0010 500 0.28 0.01 0.01 4.4E-06 160.49 0.0010

1000 0.07 0.03 0.01 0.0001 55.89 0.0003 1000 0.07 0.00 0.00 1.1E-06 55.89 0.0004

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0599

Ann Rate [g/s]: 0.0315

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 48.31 3.04 1.30 0.0024 4685.59 0.0000 20 23.29 9.91 0.0901 0.0581

30 40.60 2.56 1.09 0.0020 4028.18 0.0000 30 19.57 8.33 0.0757 0.0500

40 26.41 1.66 0.71 0.0013 3439.11 0.0000 40 12.73 5.42 0.0493 0.0427

50 18.50 1.17 0.50 0.0009 2941.66 0.0000 50 8.92 3.80 0.0345 0.0365

60 13.67 0.86 0.37 0.0007 2531.88 0.0000 60 6.59 2.80 0.0255 0.0314

80 8.35 0.53 0.22 0.0004 1940.79 0.0000 80 4.02 1.71 0.0156 0.0241

100 5.63 0.35 0.15 0.0003 1529.51 0.0000 100 2.71 1.16 0.0105 0.0190

150 2.70 0.17 0.07 0.0001 931.70 0.0000 150 1.30 0.55 0.0050 0.0116

200 1.58 0.10 0.04 0.0001 629.79 0.0000 200 0.76 0.32 0.0029 0.0078

250 1.04 0.07 0.03 0.0001 457.07 0.0000 250 0.50 0.21 0.0019 0.0057

500 0.28 0.02 0.01 1.4E-05 160.49 0.0000 500 0.13 0.06 0.0005 0.0020

1000 0.07 0.00 0.00 3.4E-06 55.89 0.0000 1000 0.03 0.01 0.0001 0.0007

D-85
Facility G-02 - 55% Perc, 43% TCE

Met Set: Oakland

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 48.31 24.71 10.52 0.1197 4685.59 0.0386 20 48.31 0.00 0.00 0.0000 4685.59 0.0000

30 40.60 20.77 8.84 0.1006 4028.18 0.0332 30 40.60 0.00 0.00 0.0000 4028.18 0.0000

40 26.41 13.51 5.75 0.0654 3439.11 0.0283 40 26.41 0.00 0.00 0.0000 3439.11 0.0000

50 18.50 9.46 4.03 0.0458 2941.66 0.0242 50 18.50 0.00 0.00 0.0000 2941.66 0.0000

60 13.67 6.99 2.98 0.0339 2531.88 0.0209 60 13.67 0.00 0.00 0.0000 2531.88 0.0000

80 8.35 4.27 1.82 0.0207 1940.79 0.0160 80 8.35 0.00 0.00 0.0000 1940.79 0.0000

100 5.63 2.88 1.23 0.0139 1529.51 0.0126 100 5.63 0.00 0.00 0.0000 1529.51 0.0000

150 2.70 1.38 0.59 0.0067 931.70 0.0077 150 2.70 0.00 0.00 0.0000 931.70 0.0000

200 1.58 0.81 0.34 0.0039 629.79 0.0052 200 1.58 0.00 0.00 0.0000 629.79 0.0000

250 1.04 0.53 0.23 0.0026 457.07 0.0038 250 1.04 0.00 0.00 0.0000 457.07 0.0000

500 0.28 0.14 0.06 0.0007 160.49 0.0013 500 0.28 0.00 0.00 0.0000 160.49 0.0000

1000 0.07 0.04 0.02 0.0002 55.89 0.0005 1000 0.07 0.00 0.00 0.0000 55.89 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.1288

Ann Rate [g/s]: 0.0677

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 48.31 6.54 2.78 0.0051 4685.59 0.0000 20 31.25 13.30 0.1248 0.0386

30 40.60 5.50 2.34 0.0043 4028.18 0.0000 30 26.27 11.18 0.1049 0.0332

40 26.41 3.58 1.52 0.0028 3439.11 0.0000 40 17.09 7.27 0.0682 0.0283

50 18.50 2.50 1.07 0.0020 2941.66 0.0000 50 11.97 5.09 0.0478 0.0242

60 13.67 1.85 0.79 0.0014 2531.88 0.0000 60 8.84 3.76 0.0353 0.0209

80 8.35 1.13 0.48 0.0009 1940.79 0.0000 80 5.40 2.30 0.0216 0.0160

100 5.63 0.76 0.32 0.0006 1529.51 0.0000 100 3.64 1.55 0.0145 0.0126

150 2.70 0.37 0.16 0.0003 931.70 0.0000 150 1.75 0.74 0.0070 0.0077

200 1.58 0.21 0.09 0.0002 629.79 0.0000 200 1.02 0.44 0.0041 0.0052

250 1.04 0.14 0.06 0.0001 457.07 0.0000 250 0.67 0.29 0.0027 0.0038

500 0.28 0.04 0.02 3.0E-05 160.49 0.0000 500 0.18 0.08 0.0007 0.0013

1000 0.07 0.01 0.00 7.4E-06 55.89 0.0000 1000 0.05 0.02 0.0002 0.0005

D-86
Facility G-02 - 94% Perc

Met Set: Default -0

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 142.83 124.80 53.13 0.6044 5276.51 0.0743 20 142.83 0.00 0.00 0.0000 5276.51 0.0000

30 117.98 103.09 43.88 0.4992 4358.64 0.0613 30 117.98 0.00 0.00 0.0000 4358.64 0.0000

40 98.78 86.31 36.74 0.4180 3649.09 0.0514 40 98.78 0.00 0.00 0.0000 3649.09 0.0000

50 83.77 73.20 31.16 0.3545 3094.79 0.0436 50 83.77 0.00 0.00 0.0000 3094.79 0.0000

60 71.89 62.82 26.74 0.3042 2656.01 0.0374 60 71.89 0.00 0.00 0.0000 2656.01 0.0000

80 54.62 47.72 20.31 0.2311 2017.70 0.0284 80 54.62 0.00 0.00 0.0000 2017.70 0.0000

100 42.94 37.52 15.97 0.1817 1586.22 0.0223 100 42.94 0.00 0.00 0.0000 1586.22 0.0000

150 26.25 22.94 9.76 0.1111 969.72 0.0136 150 26.25 0.00 0.00 0.0000 969.72 0.0000

200 17.86 15.61 6.64 0.0756 659.99 0.0093 200 17.86 0.00 0.00 0.0000 659.99 0.0000

250 13.05 11.40 4.85 0.0552 482.19 0.0068 250 13.05 0.00 0.00 0.0000 482.19 0.0000

500 4.69 4.10 1.75 0.0199 173.33 0.0024 500 4.69 0.00 0.00 0.0000 173.33 0.0000

1000 1.68 1.46 0.62 0.0071 61.90 0.0009 1000 1.68 0.00 0.00 0.0000 61.90 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 142.83 0.00 0.00 0.0000 5276.51 0.0000 20 124.80 53.13 0.6044 0.0743

30 117.98 0.00 0.00 0.0000 4358.64 0.0000 30 103.09 43.88 0.4992 0.0613

40 98.78 0.00 0.00 0.0000 3649.09 0.0000 40 86.31 36.74 0.4180 0.0514

50 83.77 0.00 0.00 0.0000 3094.79 0.0000 50 73.20 31.16 0.3545 0.0436

60 71.89 0.00 0.00 0.0000 2656.01 0.0000 60 62.82 26.74 0.3042 0.0374

80 54.62 0.00 0.00 0.0000 2017.70 0.0000 80 47.72 20.31 0.2311 0.0284

100 42.94 0.00 0.00 0.0000 1586.22 0.0000 100 37.52 15.97 0.1817 0.0223

150 26.25 0.00 0.00 0.0000 969.72 0.0000 150 22.94 9.76 0.1111 0.0136

200 17.86 0.00 0.00 0.0000 659.99 0.0000 200 15.61 6.64 0.0756 0.0093

250 13.05 0.00 0.00 0.0000 482.19 0.0000 250 11.40 4.85 0.0552 0.0068

500 4.69 0.00 0.00 0.0000 173.33 0.0000 500 4.10 1.75 0.0199 0.0024

1000 1.68 0.00 0.00 0.0000 61.90 0.0000 1000 1.46 0.62 0.0071 0.0009

D-87
Facility G-02 - 55% Perc, 25% MeCl

Met Set: Default -0

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0.0749

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0.0394

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 142.83 73.06 31.10 0.3538 5276.51 0.0435 20 142.83 5.63 2.40 0.0019 5276.51 0.0282

30 117.98 60.35 25.69 0.2923 4358.64 0.0359 30 117.98 4.65 1.98 0.0015 4358.64 0.0233

40 98.78 50.53 21.51 0.2447 3649.09 0.0301 40 98.78 3.89 1.66 0.0013 3649.09 0.0195

50 83.77 42.85 18.24 0.2075 3094.79 0.0255 50 83.77 3.30 1.40 0.0011 3094.79 0.0166

60 71.89 36.78 15.65 0.1781 2656.01 0.0219 60 71.89 2.83 1.21 0.0009 2656.01 0.0142

80 54.62 27.94 11.89 0.1353 2017.70 0.0166 80 54.62 2.15 0.92 0.0007 2017.70 0.0108

100 42.94 21.96 9.35 0.1064 1586.22 0.0131 100 42.94 1.69 0.72 0.0006 1586.22 0.0085

150 26.25 13.43 5.72 0.0650 969.72 0.0080 150 26.25 1.03 0.44 0.0003 969.72 0.0052

200 17.86 9.14 3.89 0.0443 659.99 0.0054 200 17.86 0.70 0.30 0.0002 659.99 0.0035

250 13.05 6.68 2.84 0.0323 482.19 0.0040 250 13.05 0.51 0.22 0.0002 482.19 0.0026

500 4.69 2.40 1.02 0.0116 173.33 0.0014 500 4.69 0.18 0.08 0.0001 173.33 0.0009

1000 1.68 0.86 0.36 0.0042 61.90 0.0005 1000 1.68 0.07 0.03 2.2E-05 61.90 0.0003

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 142.83 0.00 0.00 0.0000 5276.51 0.0000 20 78.69 33.50 0.3557 0.0717

30 117.98 0.00 0.00 0.0000 4358.64 0.0000 30 65.00 27.67 0.2938 0.0592

40 98.78 0.00 0.00 0.0000 3649.09 0.0000 40 54.42 23.16 0.2460 0.0496

50 83.77 0.00 0.00 0.0000 3094.79 0.0000 50 46.15 19.65 0.2086 0.0420

60 71.89 0.00 0.00 0.0000 2656.01 0.0000 60 39.61 16.86 0.1790 0.0361

80 54.62 0.00 0.00 0.0000 2017.70 0.0000 80 30.09 12.81 0.1360 0.0274

100 42.94 0.00 0.00 0.0000 1586.22 0.0000 100 23.66 10.07 0.1069 0.0215

150 26.25 0.00 0.00 0.0000 969.72 0.0000 150 14.46 6.16 0.0654 0.0132

200 17.86 0.00 0.00 0.0000 659.99 0.0000 200 9.84 4.19 0.0445 0.0090

250 13.05 0.00 0.00 0.0000 482.19 0.0000 250 7.19 3.06 0.0325 0.0066

500 4.69 0.00 0.00 0.0000 173.33 0.0000 500 2.58 1.10 0.0117 0.0024

1000 1.68 0.00 0.00 0.0000 61.90 0.0000 1000 0.92 0.39 0.0042 0.0008

D-88
Facility G-02 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Default -0

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1198 op hrs/wk: 57 Acu Rate [g/s]: 0.0898

Ann Rate [g/s]: 0.0630 Ann Rate [g/s]: 0.0473

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 142.83 53.09 22.60 0.2571 5276.51 0.0316 20 142.83 6.76 2.88 0.0023 5276.51 0.0338

30 117.98 43.85 18.67 0.2124 4358.64 0.0261 30 117.98 5.58 2.38 0.0019 4358.64 0.0280

40 98.78 36.71 15.63 0.1778 3649.09 0.0219 40 98.78 4.67 1.99 0.0016 3649.09 0.0234

50 83.77 31.14 13.25 0.1508 3094.79 0.0185 50 83.77 3.96 1.69 0.0013 3094.79 0.0199

60 71.89 26.72 11.38 0.1294 2656.01 0.0159 60 71.89 3.40 1.45 0.0011 2656.01 0.0170

80 54.62 20.30 8.64 0.0983 2017.70 0.0121 80 54.62 2.58 1.10 0.0009 2017.70 0.0129

100 42.94 15.96 6.79 0.0773 1586.22 0.0095 100 42.94 2.03 0.86 0.0007 1586.22 0.0102

150 26.25 9.76 4.15 0.0472 969.72 0.0058 150 26.25 1.24 0.53 0.0004 969.72 0.0062

200 17.86 6.64 2.83 0.0322 659.99 0.0040 200 17.86 0.85 0.36 0.0003 659.99 0.0042

250 13.05 4.85 2.07 0.0235 482.19 0.0029 250 13.05 0.62 0.26 0.0002 482.19 0.0031

500 4.69 1.74 0.74 0.0084 173.33 0.0010 500 4.69 0.22 0.09 0.0001 173.33 0.0011

1000 1.68 0.62 0.27 0.0030 61.90 0.0004 1000 1.68 0.08 0.03 2.6E-05 61.90 0.0004

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0599

Ann Rate [g/s]: 0.0315

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 142.83 9.00 3.83 0.0070 5276.51 0.0000 20 68.84 29.30 0.2664 0.0655

30 117.98 7.43 3.16 0.0058 4358.64 0.0000 30 56.87 24.21 0.2200 0.0541

40 98.78 6.22 2.65 0.0049 3649.09 0.0000 40 47.61 20.27 0.1842 0.0453

50 83.77 5.28 2.25 0.0041 3094.79 0.0000 50 40.38 17.19 0.1562 0.0384

60 71.89 4.53 1.93 0.0035 2656.01 0.0000 60 34.65 14.75 0.1341 0.0329

80 54.62 3.44 1.46 0.0027 2017.70 0.0000 80 26.32 11.21 0.1019 0.0250

100 42.94 2.71 1.15 0.0021 1586.22 0.0000 100 20.70 8.81 0.0801 0.0197

150 26.25 1.65 0.70 0.0013 969.72 0.0000 150 12.65 5.39 0.0490 0.0120

200 17.86 1.13 0.48 0.0009 659.99 0.0000 200 8.61 3.67 0.0333 0.0082

250 13.05 0.82 0.35 0.0006 482.19 0.0000 250 6.29 2.68 0.0243 0.0060

500 4.69 0.30 0.13 0.0002 173.33 0.0000 500 2.26 0.96 0.0088 0.0022

1000 1.68 0.11 0.04 0.0001 61.90 0.0000 1000 0.81 0.34 0.0031 0.0008

D-89
Facility G-02 - 55% Perc, 43% TCE

Met Set: Default -0

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 142.83 73.06 31.10 0.3538 5276.51 0.0435 20 142.83 0.00 0.00 0.0000 5276.51 0.0000

30 117.98 60.35 25.69 0.2923 4358.64 0.0359 30 117.98 0.00 0.00 0.0000 4358.64 0.0000

40 98.78 50.53 21.51 0.2447 3649.09 0.0301 40 98.78 0.00 0.00 0.0000 3649.09 0.0000

50 83.77 42.85 18.24 0.2075 3094.79 0.0255 50 83.77 0.00 0.00 0.0000 3094.79 0.0000

60 71.89 36.78 15.65 0.1781 2656.01 0.0219 60 71.89 0.00 0.00 0.0000 2656.01 0.0000

80 54.62 27.94 11.89 0.1353 2017.70 0.0166 80 54.62 0.00 0.00 0.0000 2017.70 0.0000

100 42.94 21.96 9.35 0.1064 1586.22 0.0131 100 42.94 0.00 0.00 0.0000 1586.22 0.0000

150 26.25 13.43 5.72 0.0650 969.72 0.0080 150 26.25 0.00 0.00 0.0000 969.72 0.0000

200 17.86 9.14 3.89 0.0443 659.99 0.0054 200 17.86 0.00 0.00 0.0000 659.99 0.0000

250 13.05 6.68 2.84 0.0323 482.19 0.0040 250 13.05 0.00 0.00 0.0000 482.19 0.0000

500 4.69 2.40 1.02 0.0116 173.33 0.0014 500 4.69 0.00 0.00 0.0000 173.33 0.0000

1000 1.68 0.86 0.36 0.0042 61.90 0.0005 1000 1.68 0.00 0.00 0.0000 61.90 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.1288

Ann Rate [g/s]: 0.0677

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 142.83 19.34 8.23 0.0151 5276.51 0.0000 20 92.40 39.33 0.3689 0.0435

30 117.98 15.97 6.80 0.0125 4358.64 0.0000 30 76.33 32.49 0.3047 0.0359

40 98.78 13.37 5.69 0.0104 3649.09 0.0000 40 63.90 27.20 0.2551 0.0301

50 83.77 11.34 4.83 0.0089 3094.79 0.0000 50 54.19 23.07 0.2164 0.0255

60 71.89 9.73 4.14 0.0076 2656.01 0.0000 60 46.51 19.80 0.1857 0.0219

80 54.62 7.40 3.15 0.0058 2017.70 0.0000 80 35.33 15.04 0.1411 0.0166

100 42.94 5.81 2.47 0.0045 1586.22 0.0000 100 27.78 11.82 0.1109 0.0131

150 26.25 3.55 1.51 0.0028 969.72 0.0000 150 16.98 7.23 0.0678 0.0080

200 17.86 2.42 1.03 0.0019 659.99 0.0000 200 11.56 4.92 0.0461 0.0054

250 13.05 1.77 0.75 0.0014 482.19 0.0000 250 8.44 3.59 0.0337 0.0040

500 4.69 0.64 0.27 0.0005 173.33 0.0000 500 3.04 1.29 0.0121 0.0014

1000 1.68 0.23 0.10 0.0002 61.90 0.0000 1000 1.08 0.46 0.0043 0.0005

D-90
Risk Assessment Summary - 3 Generic Facilities

Multicomponent Impacts - Brake Cleaners - Acute

Facility G-02 - 94% Perc

Met Set: Fresno

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 72.47 63.32 26.96 0.3067 2850.30 0.0401 20 72.47 0.00 0.00 0.0000 2850.30 0.0000

30 57.46 50.21 21.37 0.2431 2669.99 0.0376 30 57.46 0.00 0.00 0.0000 2669.99 0.0000

40 37.02 32.35 13.77 0.1566 2147.67 0.0302 40 37.02 0.00 0.00 0.0000 2147.67 0.0000

50 25.71 22.47 9.56 0.1088 1809.24 0.0255 50 25.71 0.00 0.00 0.0000 1809.24 0.0000

60 18.87 16.49 7.02 0.0798 1526.84 0.0215 60 18.87 0.00 0.00 0.0000 1526.84 0.0000

80 11.40 9.96 4.24 0.0482 1127.36 0.0159 80 11.40 0.00 0.00 0.0000 1127.36 0.0000

100 7.62 6.66 2.83 0.0322 865.93 0.0122 100 7.62 0.00 0.00 0.0000 865.93 0.0000

150 3.60 3.15 1.34 0.0152 507.64 0.0071 150 3.60 0.00 0.00 0.0000 507.64 0.0000

200 2.09 1.83 0.78 0.0088 335.73 0.0047 200 2.09 0.00 0.00 0.0000 335.73 0.0000

250 1.36 1.19 0.51 0.0058 240.23 0.0034 250 1.36 0.00 0.00 0.0000 240.23 0.0000

500 0.35 0.31 0.13 0.0015 81.50 0.0011 500 0.35 0.00 0.00 0.0000 81.50 0.0000

1000 0.09 0.08 0.03 0.0004 27.65 0.0004 1000 0.09 0.00 0.00 0.0000 27.65 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 72.47 0.00 0.00 0.0000 2850.30 0.0000 20 63.32 26.96 0.3067 0.0401

30 57.46 0.00 0.00 0.0000 2669.99 0.0000 30 50.21 21.37 0.2431 0.0376

40 37.02 0.00 0.00 0.0000 2147.67 0.0000 40 32.35 13.77 0.1566 0.0302

50 25.71 0.00 0.00 0.0000 1809.24 0.0000 50 22.47 9.56 0.1088 0.0255

60 18.87 0.00 0.00 0.0000 1526.84 0.0000 60 16.49 7.02 0.0798 0.0215

80 11.40 0.00 0.00 0.0000 1127.36 0.0000 80 9.96 4.24 0.0482 0.0159

100 7.62 0.00 0.00 0.0000 865.93 0.0000 100 6.66 2.83 0.0322 0.0122

150 3.60 0.00 0.00 0.0000 507.64 0.0000 150 3.15 1.34 0.0152 0.0071

200 2.09 0.00 0.00 0.0000 335.73 0.0000 200 1.83 0.78 0.0088 0.0047

250 1.36 0.00 0.00 0.0000 240.23 0.0000 250 1.19 0.51 0.0058 0.0034

500 0.35 0.00 0.00 0.0000 81.50 0.0000 500 0.31 0.13 0.0015 0.0011

1000 0.09 0.00 0.00 0.0000 27.65 0.0000 1000 0.08 0.03 0.0004 0.0004

D-91
Facility G-02 - 55% Perc, 25% MeCl

Met Set: Fresno

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0.0749

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0.0394

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 72.47 37.07 15.78 0.1795 2850.30 0.0235 20 72.47 2.86 1.22 0.0010 2850.30 0.0152

30 57.46 29.39 12.51 0.1423 2669.99 0.0220 30 57.46 2.26 0.96 0.0008 2669.99 0.0143

40 37.02 18.94 8.06 0.0917 2147.67 0.0177 40 37.02 1.46 0.62 0.0005 2147.67 0.0115

50 25.71 13.15 5.60 0.0637 1809.24 0.0149 50 25.71 1.01 0.43 0.0003 1809.24 0.0097

60 18.87 9.65 4.11 0.0467 1526.84 0.0126 60 18.87 0.74 0.32 0.0002 1526.84 0.0082

80 11.40 5.83 2.48 0.0282 1127.36 0.0093 80 11.40 0.45 0.19 0.0001 1127.36 0.0060

100 7.62 3.90 1.66 0.0189 865.93 0.0071 100 7.62 0.30 0.13 0.0001 865.93 0.0046

150 3.60 1.84 0.78 0.0089 507.64 0.0042 150 3.60 0.14 0.06 4.7E-05 507.64 0.0027

200 2.09 1.07 0.46 0.0052 335.73 0.0028 200 2.09 0.08 0.04 2.7E-05 335.73 0.0018

250 1.36 0.70 0.30 0.0034 240.23 0.0020 250 1.36 0.05 0.02 1.8E-05 240.23 0.0013

500 0.35 0.18 0.08 0.0009 81.50 0.0007 500 0.35 0.01 0.01 4.6E-06 81.50 0.0004

1000 0.09 0.05 0.02 0.0002 27.65 0.0002 1000 0.09 0.00 0.00 1.2E-06 27.65 0.0001

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 72.47 0.00 0.00 0.0000 2850.30 0.0000 20 39.93 17.00 0.1805 0.0387

30 57.46 0.00 0.00 0.0000 2669.99 0.0000 30 31.66 13.48 0.1431 0.0363

40 37.02 0.00 0.00 0.0000 2147.67 0.0000 40 20.40 8.68 0.0922 0.0292

50 25.71 0.00 0.00 0.0000 1809.24 0.0000 50 14.16 6.03 0.0640 0.0246

60 18.87 0.00 0.00 0.0000 1526.84 0.0000 60 10.40 4.43 0.0470 0.0207

80 11.40 0.00 0.00 0.0000 1127.36 0.0000 80 6.28 2.67 0.0284 0.0153

100 7.62 0.00 0.00 0.0000 865.93 0.0000 100 4.20 1.79 0.0190 0.0118

150 3.60 0.00 0.00 0.0000 507.64 0.0000 150 1.98 0.84 0.0090 0.0069

200 2.09 0.00 0.00 0.0000 335.73 0.0000 200 1.15 0.49 0.0052 0.0046

250 1.36 0.00 0.00 0.0000 240.23 0.0000 250 0.75 0.32 0.0034 0.0033

500 0.35 0.00 0.00 0.0000 81.50 0.0000 500 0.19 0.08 0.0009 0.0011

1000 0.09 0.00 0.00 0.0000 27.65 0.0000 1000 0.05 0.02 0.0002 0.0004

D-92
Facility G-02 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Fresno

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1198 op hrs/wk: 57 Acu Rate [g/s]: 0.0898

Ann Rate [g/s]: 0.0630 Ann Rate [g/s]: 0.0473

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 72.47 26.94 11.47 0.1304 2850.30 0.0171 20 72.47 3.43 1.46 0.0011 2850.30 0.0183

30 57.46 21.36 9.09 0.1034 2669.99 0.0160 30 57.46 2.72 1.16 0.0009 2669.99 0.0171

40 37.02 13.76 5.86 0.0666 2147.67 0.0129 40 37.02 1.75 0.75 0.0006 2147.67 0.0138

50 25.71 9.56 4.07 0.0463 1809.24 0.0108 50 25.71 1.22 0.52 0.0004 1809.24 0.0116

60 18.87 7.01 2.99 0.0340 1526.84 0.0091 60 18.87 0.89 0.38 0.0003 1526.84 0.0098

80 11.40 4.24 1.80 0.0205 1127.36 0.0068 80 11.40 0.54 0.23 0.0002 1127.36 0.0072

100 7.62 2.83 1.21 0.0137 865.93 0.0052 100 7.62 0.36 0.15 0.0001 865.93 0.0056

150 3.60 1.34 0.57 0.0065 507.64 0.0030 150 3.60 0.17 0.07 0.0001 507.64 0.0033

200 2.09 0.78 0.33 0.0038 335.73 0.0020 200 2.09 0.10 0.04 3.3E-05 335.73 0.0022

250 1.36 0.51 0.22 0.0024 240.23 0.0014 250 1.36 0.06 0.03 2.1E-05 240.23 0.0015

500 0.35 0.13 0.06 0.0006 81.50 0.0005 500 0.35 0.02 0.01 5.5E-06 81.50 0.0005

1000 0.09 0.03 0.01 0.0002 27.65 0.0002 1000 0.09 0.00 0.00 1.4E-06 27.65 0.0002

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0599

Ann Rate [g/s]: 0.0315

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 72.47 4.57 1.94 0.0036 2850.30 0.0000 20 34.93 14.87 0.1352 0.0354

30 57.46 3.62 1.54 0.0028 2669.99 0.0000 30 27.70 11.79 0.1072 0.0331

40 37.02 2.33 0.99 0.0018 2147.67 0.0000 40 17.84 7.60 0.0690 0.0266

50 25.71 1.62 0.69 0.0013 1809.24 0.0000 50 12.39 5.28 0.0479 0.0224

60 18.87 1.19 0.51 0.0009 1526.84 0.0000 60 9.10 3.87 0.0352 0.0189

80 11.40 0.72 0.31 0.0006 1127.36 0.0000 80 5.49 2.34 0.0213 0.0140

100 7.62 0.48 0.20 0.0004 865.93 0.0000 100 3.67 1.56 0.0142 0.0107

150 3.60 0.23 0.10 0.0002 507.64 0.0000 150 1.74 0.74 0.0067 0.0063

200 2.09 0.13 0.06 0.0001 335.73 0.0000 200 1.01 0.43 0.0039 0.0042

250 1.36 0.09 0.04 0.0001 240.23 0.0000 250 0.66 0.28 0.0025 0.0030

500 0.35 0.02 0.01 1.7E-05 81.50 0.0000 500 0.17 0.07 0.0007 0.0010

1000 0.09 0.01 0.00 4.4E-06 27.65 0.0000 1000 0.04 0.02 0.0002 0.0003

D-93
Facility G-02 - 55% Perc, 43% TCE

Met Set: Fresno

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 72.47 37.07 15.78 0.1795 2850.30 0.0235 20 72.47 0.00 0.00 0.0000 2850.30 0.0000

30 57.46 29.39 12.51 0.1423 2669.99 0.0220 30 57.46 0.00 0.00 0.0000 2669.99 0.0000

40 37.02 18.94 8.06 0.0917 2147.67 0.0177 40 37.02 0.00 0.00 0.0000 2147.67 0.0000

50 25.71 13.15 5.60 0.0637 1809.24 0.0149 50 25.71 0.00 0.00 0.0000 1809.24 0.0000

60 18.87 9.65 4.11 0.0467 1526.84 0.0126 60 18.87 0.00 0.00 0.0000 1526.84 0.0000

80 11.40 5.83 2.48 0.0282 1127.36 0.0093 80 11.40 0.00 0.00 0.0000 1127.36 0.0000

100 7.62 3.90 1.66 0.0189 865.93 0.0071 100 7.62 0.00 0.00 0.0000 865.93 0.0000

150 3.60 1.84 0.78 0.0089 507.64 0.0042 150 3.60 0.00 0.00 0.0000 507.64 0.0000

200 2.09 1.07 0.46 0.0052 335.73 0.0028 200 2.09 0.00 0.00 0.0000 335.73 0.0000

250 1.36 0.70 0.30 0.0034 240.23 0.0020 250 1.36 0.00 0.00 0.0000 240.23 0.0000

500 0.35 0.18 0.08 0.0009 81.50 0.0007 500 0.35 0.00 0.00 0.0000 81.50 0.0000

1000 0.09 0.05 0.02 0.0002 27.65 0.0002 1000 0.09 0.00 0.00 0.0000 27.65 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.1288

Ann Rate [g/s]: 0.0677

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 72.47 9.81 4.18 0.0077 2850.30 0.0000 20 46.88 19.96 0.1872 0.0235

30 57.46 7.78 3.31 0.0061 2669.99 0.0000 30 37.17 15.82 0.1484 0.0220

40 37.02 5.01 2.13 0.0039 2147.67 0.0000 40 23.95 10.19 0.0956 0.0177

50 25.71 3.48 1.48 0.0027 1809.24 0.0000 50 16.63 7.08 0.0664 0.0149

60 18.87 2.55 1.09 0.0020 1526.84 0.0000 60 12.21 5.20 0.0487 0.0126

80 11.40 1.54 0.66 0.0012 1127.36 0.0000 80 7.38 3.14 0.0294 0.0093

100 7.62 1.03 0.44 0.0008 865.93 0.0000 100 4.93 2.10 0.0197 0.0071

150 3.60 0.49 0.21 0.0004 507.64 0.0000 150 2.33 0.99 0.0093 0.0042

200 2.09 0.28 0.12 0.0002 335.73 0.0000 200 1.35 0.58 0.0054 0.0028

250 1.36 0.18 0.08 0.0001 240.23 0.0000 250 0.88 0.37 0.0035 0.0020

500 0.35 0.05 0.02 3.7E-05 81.50 0.0000 500 0.23 0.10 0.0009 0.0007

1000 0.09 0.01 0.01 9.5E-06 27.65 0.0000 1000 0.06 0.02 0.0002 0.0002

D-94
Facility G-02 - 94% Perc

Met Set: Concord

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 97.28 85.00 36.18 0.4116 5532.86 0.0779 20 97.28 0.00 0.00 0.0000 5532.86 0.0000

30 71.32 62.32 26.53 0.3018 4845.41 0.0682 30 71.32 0.00 0.00 0.0000 4845.41 0.0000

40 46.19 40.36 17.18 0.1954 4048.28 0.0570 40 46.19 0.00 0.00 0.0000 4048.28 0.0000

50 32.27 28.20 12.00 0.1365 3418.07 0.0481 50 32.27 0.00 0.00 0.0000 3418.07 0.0000

60 23.83 20.82 8.86 0.1008 2918.05 0.0411 60 23.83 0.00 0.00 0.0000 2918.05 0.0000

80 14.54 12.70 5.41 0.0615 2193.50 0.0309 80 14.54 0.00 0.00 0.0000 2193.50 0.0000

100 9.80 8.56 3.65 0.0415 1708.42 0.0240 100 9.80 0.00 0.00 0.0000 1708.42 0.0000

150 4.70 4.11 1.75 0.0199 1026.40 0.0144 150 4.70 0.00 0.00 0.0000 1026.40 0.0000

200 2.75 2.40 1.02 0.0116 690.62 0.0097 200 2.75 0.00 0.00 0.0000 690.62 0.0000

250 1.81 1.58 0.67 0.0077 500.60 0.0070 250 1.81 0.00 0.00 0.0000 500.60 0.0000

500 0.48 0.42 0.18 0.0020 176.69 0.0025 500 0.48 0.00 0.00 0.0000 176.69 0.0000

1000 0.14 0.12 0.05 0.0006 62.47 0.0009 1000 0.14 0.00 0.00 0.0000 62.47 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 97.28 0.00 0.00 0.0000 5532.86 0.0000 20 85.00 36.18 0.4116 0.0779

30 71.32 0.00 0.00 0.0000 4845.41 0.0000 30 62.32 26.53 0.3018 0.0682

40 46.19 0.00 0.00 0.0000 4048.28 0.0000 40 40.36 17.18 0.1954 0.0570

50 32.27 0.00 0.00 0.0000 3418.07 0.0000 50 28.20 12.00 0.1365 0.0481

60 23.83 0.00 0.00 0.0000 2918.05 0.0000 60 20.82 8.86 0.1008 0.0411

80 14.54 0.00 0.00 0.0000 2193.50 0.0000 80 12.70 5.41 0.0615 0.0309

100 9.80 0.00 0.00 0.0000 1708.42 0.0000 100 8.56 3.65 0.0415 0.0240

150 4.70 0.00 0.00 0.0000 1026.40 0.0000 150 4.11 1.75 0.0199 0.0144

200 2.75 0.00 0.00 0.0000 690.62 0.0000 200 2.40 1.02 0.0116 0.0097

250 1.81 0.00 0.00 0.0000 500.60 0.0000 250 1.58 0.67 0.0077 0.0070

500 0.48 0.00 0.00 0.0000 176.69 0.0000 500 0.42 0.18 0.0020 0.0025

1000 0.14 0.00 0.00 0.0000 62.47 0.0000 1000 0.12 0.05 0.0006 0.0009

D-95
Facility G-02 - 55% Perc, 25% MeCl

Met Set: Concord

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0.0749

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0.0473

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 97.28 49.76 21.18 0.2410 5532.86 0.0456 20 97.28 3.83 1.63 0.0013 5532.86 0.0296

30 71.32 36.48 15.53 0.1767 4845.41 0.0399 30 71.32 2.81 1.20 0.0009 4845.41 0.0259

40 46.19 23.63 10.06 0.1144 4048.28 0.0333 40 46.19 1.82 0.77 0.0006 4048.28 0.0217

50 32.27 16.51 7.03 0.0799 3418.07 0.0281 50 32.27 1.27 0.54 0.0004 3418.07 0.0183

60 23.83 12.19 5.19 0.0590 2918.05 0.0240 60 23.83 0.94 0.40 0.0003 2918.05 0.0156

80 14.54 7.44 3.17 0.0360 2193.50 0.0181 80 14.54 0.57 0.24 0.0002 2193.50 0.0117

100 9.80 5.01 2.13 0.0243 1708.42 0.0141 100 9.80 0.39 0.16 0.0001 1708.42 0.0091

150 4.70 2.40 1.02 0.0116 1026.40 0.0085 150 4.70 0.19 0.08 0.0001 1026.40 0.0055

200 2.75 1.41 0.60 0.0068 690.62 0.0057 200 2.75 0.11 0.05 3.6E-05 690.62 0.0037

250 1.81 0.93 0.39 0.0045 500.60 0.0041 250 1.81 0.07 0.03 2.4E-05 500.60 0.0027

500 0.48 0.25 0.10 0.0012 176.69 0.0015 500 0.48 0.02 0.01 6.3E-06 176.69 0.0009

1000 0.14 0.07 0.03 0.0003 62.47 0.0005 1000 0.14 0.01 0.00 1.8E-06 62.47 0.0003

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 97.28 0.00 0.00 0.0000 5532.86 0.0000 20 53.59 22.81 0.2423 0.0752

30 71.32 0.00 0.00 0.0000 4845.41 0.0000 30 39.29 16.73 0.1776 0.0658

40 46.19 0.00 0.00 0.0000 4048.28 0.0000 40 25.45 10.83 0.1150 0.0550

50 32.27 0.00 0.00 0.0000 3418.07 0.0000 50 17.78 7.57 0.0804 0.0464

60 23.83 0.00 0.00 0.0000 2918.05 0.0000 60 13.13 5.59 0.0593 0.0396

80 14.54 0.00 0.00 0.0000 2193.50 0.0000 80 8.01 3.41 0.0362 0.0298

100 9.80 0.00 0.00 0.0000 1708.42 0.0000 100 5.40 2.30 0.0244 0.0232

150 4.70 0.00 0.00 0.0000 1026.40 0.0000 150 2.59 1.10 0.0117 0.0139

200 2.75 0.00 0.00 0.0000 690.62 0.0000 200 1.52 0.64 0.0068 0.0094

250 1.81 0.00 0.00 0.0000 500.60 0.0000 250 1.00 0.42 0.0045 0.0068

500 0.48 0.00 0.00 0.0000 176.69 0.0000 500 0.26 0.11 0.0012 0.0024

1000 0.14 0.00 0.00 0.0000 62.47 0.0000 1000 0.08 0.03 0.0003 0.0008

D-96
Facility G-02 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Concord

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1198 op hrs/wk: 57 Acu Rate [g/s]: 0.0898

Ann Rate [g/s]: 0.0630 Ann Rate [g/s]: 0.0473

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 97.28 36.16 15.39 0.1751 5532.86 0.0331 20 97.28 4.60 1.96 0.0015 5532.86 0.0355

30 71.32 26.51 11.28 0.1284 4845.41 0.0290 30 71.32 3.37 1.44 0.0011 4845.41 0.0311

40 46.19 17.17 7.31 0.0831 4048.28 0.0242 40 46.19 2.18 0.93 0.0007 4048.28 0.0260

50 32.27 11.99 5.11 0.0581 3418.07 0.0205 50 32.27 1.53 0.65 0.0005 3418.07 0.0219

60 23.83 8.86 3.77 0.0429 2918.05 0.0175 60 23.83 1.13 0.48 0.0004 2918.05 0.0187

80 14.54 5.40 2.30 0.0262 2193.50 0.0131 80 14.54 0.69 0.29 0.0002 2193.50 0.0141

100 9.80 3.64 1.55 0.0176 1708.42 0.0102 100 9.80 0.46 0.20 0.0002 1708.42 0.0110

150 4.70 1.75 0.74 0.0085 1026.40 0.0061 150 4.70 0.22 0.09 0.0001 1026.40 0.0066

200 2.75 1.02 0.44 0.0050 690.62 0.0041 200 2.75 0.13 0.06 4.3E-05 690.62 0.0044

250 1.81 0.67 0.29 0.0033 500.60 0.0030 250 1.81 0.09 0.04 2.9E-05 500.60 0.0032

500 0.48 0.18 0.08 0.0009 176.69 0.0011 500 0.48 0.02 0.01 7.6E-06 176.69 0.0011

1000 0.14 0.05 0.02 0.0003 62.47 0.0004 1000 0.14 0.01 0.00 2.2E-06 62.47 0.0004

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0599

Ann Rate [g/s]: 0.0315

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 97.28 6.13 2.61 0.0048 5532.86 0.0000 20 46.89 19.96 0.1814 0.0686

30 71.32 4.49 1.91 0.0035 4845.41 0.0000 30 34.38 14.63 0.1330 0.0601

40 46.19 2.91 1.24 0.0023 4048.28 0.0000 40 22.26 9.48 0.0861 0.0502

50 32.27 2.03 0.87 0.0016 3418.07 0.0000 50 15.55 6.62 0.0602 0.0424

60 23.83 1.50 0.64 0.0012 2918.05 0.0000 60 11.49 4.89 0.0444 0.0362

80 14.54 0.92 0.39 0.0007 2193.50 0.0000 80 7.01 2.98 0.0271 0.0272

100 9.80 0.62 0.26 0.0005 1708.42 0.0000 100 4.72 2.01 0.0183 0.0212

150 4.70 0.30 0.13 0.0002 1026.40 0.0000 150 2.27 0.96 0.0088 0.0127

200 2.75 0.17 0.07 0.0001 690.62 0.0000 200 1.33 0.56 0.0051 0.0086

250 1.81 0.11 0.05 0.0001 500.60 0.0000 250 0.87 0.37 0.0034 0.0062

500 0.48 0.03 0.01 2.4E-05 176.69 0.0000 500 0.23 0.10 0.0009 0.0022

1000 0.14 0.01 0.00 6.9E-06 62.47 0.0000 1000 0.07 0.03 0.0003 0.0008

D-97
Facility G-02 - 55% Perc, 43% TCE

Met Set: Concord

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 97.28 49.76 21.18 0.2410 5532.86 0.0456 20 97.28 0.00 0.00 0.0000 5532.86 0.0000

30 71.32 36.48 15.53 0.1767 4845.41 0.0399 30 71.32 0.00 0.00 0.0000 4845.41 0.0000

40 46.19 23.63 10.06 0.1144 4048.28 0.0333 40 46.19 0.00 0.00 0.0000 4048.28 0.0000

50 32.27 16.51 7.03 0.0799 3418.07 0.0281 50 32.27 0.00 0.00 0.0000 3418.07 0.0000

60 23.83 12.19 5.19 0.0590 2918.05 0.0240 60 23.83 0.00 0.00 0.0000 2918.05 0.0000

80 14.54 7.44 3.17 0.0360 2193.50 0.0181 80 14.54 0.00 0.00 0.0000 2193.50 0.0000

100 9.80 5.01 2.13 0.0243 1708.42 0.0141 100 9.80 0.00 0.00 0.0000 1708.42 0.0000

150 4.70 2.40 1.02 0.0116 1026.40 0.0085 150 4.70 0.00 0.00 0.0000 1026.40 0.0000

200 2.75 1.41 0.60 0.0068 690.62 0.0057 200 2.75 0.00 0.00 0.0000 690.62 0.0000

250 1.81 0.93 0.39 0.0045 500.60 0.0041 250 1.81 0.00 0.00 0.0000 500.60 0.0000

500 0.48 0.25 0.10 0.0012 176.69 0.0015 500 0.48 0.00 0.00 0.0000 176.69 0.0000

1000 0.14 0.07 0.03 0.0003 62.47 0.0005 1000 0.14 0.00 0.00 0.0000 62.47 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.1288

Ann Rate [g/s]: 0.0677

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 97.28 13.17 5.61 0.0103 5532.86 0.0000 20 62.93 26.79 0.2513 0.0456

30 71.32 9.66 4.11 0.0075 4845.41 0.0000 30 46.14 19.64 0.1842 0.0399

40 46.19 6.25 2.66 0.0049 4048.28 0.0000 40 29.88 12.72 0.1193 0.0333

50 32.27 4.37 1.86 0.0034 3418.07 0.0000 50 20.88 8.89 0.0834 0.0281

60 23.83 3.23 1.37 0.0025 2918.05 0.0000 60 15.42 6.56 0.0616 0.0240

80 14.54 1.97 0.84 0.0015 2193.50 0.0000 80 9.41 4.00 0.0376 0.0181

100 9.80 1.33 0.56 0.0010 1708.42 0.0000 100 6.34 2.70 0.0253 0.0141

150 4.70 0.64 0.27 0.0005 1026.40 0.0000 150 3.04 1.29 0.0121 0.0085

200 2.75 0.37 0.16 0.0003 690.62 0.0000 200 1.78 0.76 0.0071 0.0057

250 1.81 0.25 0.10 0.0002 500.60 0.0000 250 1.17 0.50 0.0047 0.0041

500 0.48 0.06 0.03 0.0001 176.69 0.0000 500 0.31 0.13 0.0012 0.0015

1000 0.14 0.02 0.01 1.5E-05 62.47 0.0000 1000 0.09 0.04 0.0004 0.0005

D-98
Facility G-02 - 94% Perc

Met Set: Mather

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 57.90 50.59 21.54 0.2450 3794.23 0.0534 20 57.90 0.00 0.00 0.0000 3794.23 0.0000

30 42.67 37.28 15.87 0.1806 3373.60 0.0475 30 42.67 0.00 0.00 0.0000 3373.60 0.0000

40 27.44 23.98 10.21 0.1161 2579.42 0.0363 40 27.44 0.00 0.00 0.0000 2579.42 0.0000

50 19.05 16.65 7.09 0.0806 2118.71 0.0298 50 19.05 0.00 0.00 0.0000 2118.71 0.0000

60 13.97 12.21 5.20 0.0591 1819.33 0.0256 60 13.97 0.00 0.00 0.0000 1819.33 0.0000

80 8.44 7.37 3.14 0.0357 1377.52 0.0194 80 8.44 0.00 0.00 0.0000 1377.52 0.0000

100 5.64 4.93 2.10 0.0239 1077.14 0.0152 100 5.64 0.00 0.00 0.0000 1077.14 0.0000

150 2.66 2.32 0.99 0.0113 649.65 0.0091 150 2.66 0.00 0.00 0.0000 649.65 0.0000

200 1.55 1.35 0.58 0.0066 438.54 0.0062 200 1.55 0.00 0.00 0.0000 438.54 0.0000

250 1.01 0.88 0.38 0.0043 319.33 0.0045 250 1.01 0.00 0.00 0.0000 319.33 0.0000

500 0.26 0.23 0.10 0.0011 113.98 0.0016 500 0.26 0.00 0.00 0.0000 113.98 0.0000

1000 0.07 0.06 0.03 0.0003 40.48 0.0006 1000 0.07 0.00 0.00 0.0000 40.48 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 57.90 0.00 0.00 0.0000 3794.23 0.0000 20 50.59 21.54 0.2450 0.0534

30 42.67 0.00 0.00 0.0000 3373.60 0.0000 30 37.28 15.87 0.1806 0.0475

40 27.44 0.00 0.00 0.0000 2579.42 0.0000 40 23.98 10.21 0.1161 0.0363

50 19.05 0.00 0.00 0.0000 2118.71 0.0000 50 16.65 7.09 0.0806 0.0298

60 13.97 0.00 0.00 0.0000 1819.33 0.0000 60 12.21 5.20 0.0591 0.0256

80 8.44 0.00 0.00 0.0000 1377.52 0.0000 80 7.37 3.14 0.0357 0.0194

100 5.64 0.00 0.00 0.0000 1077.14 0.0000 100 4.93 2.10 0.0239 0.0152

150 2.66 0.00 0.00 0.0000 649.65 0.0000 150 2.32 0.99 0.0113 0.0091

200 1.55 0.00 0.00 0.0000 438.54 0.0000 200 1.35 0.58 0.0066 0.0062

250 1.01 0.00 0.00 0.0000 319.33 0.0000 250 0.88 0.38 0.0043 0.0045

500 0.26 0.00 0.00 0.0000 113.98 0.0000 500 0.23 0.10 0.0011 0.0016

1000 0.07 0.00 0.00 0.0000 40.48 0.0000 1000 0.06 0.03 0.0003 0.0006

D-99
Facility G-02 - 55% Perc, 25% MeCl

Met Set: Mather

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0.0749

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0.0394

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 57.90 29.62 12.61 0.1434 3794.23 0.0312 20 57.90 2.28 0.97 0.0008 3794.23 0.0203

30 42.67 21.83 9.29 0.1057 3373.60 0.0278 30 42.67 1.68 0.72 0.0006 3373.60 0.0180

40 27.44 14.04 5.98 0.0680 2579.42 0.0212 40 27.44 1.08 0.46 0.0004 2579.42 0.0138

50 19.05 9.74 4.15 0.0472 2118.71 0.0174 50 19.05 0.75 0.32 0.0003 2118.71 0.0113

60 13.97 7.15 3.04 0.0346 1819.33 0.0150 60 13.97 0.55 0.23 0.0002 1819.33 0.0097

80 8.44 4.32 1.84 0.0209 1377.52 0.0113 80 8.44 0.33 0.14 0.0001 1377.52 0.0074

100 5.64 2.89 1.23 0.0140 1077.14 0.0089 100 5.64 0.22 0.09 0.0001 1077.14 0.0058

150 2.66 1.36 0.58 0.0066 649.65 0.0053 150 2.66 0.10 0.04 3.5E-05 649.65 0.0035

200 1.55 0.79 0.34 0.0038 438.54 0.0036 200 1.55 0.06 0.03 2.0E-05 438.54 0.0023

250 1.01 0.52 0.22 0.0025 319.33 0.0026 250 1.01 0.04 0.02 1.3E-05 319.33 0.0017

500 0.26 0.13 0.06 0.0006 113.98 0.0009 500 0.26 0.01 0.00 3.4E-06 113.98 0.0006

1000 0.07 0.04 0.02 0.0002 40.48 0.0003 1000 0.07 0.00 0.00 9.2E-07 40.48 0.0002

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 57.90 0.00 0.00 0.0000 3794.23 0.0000 20 31.90 13.58 0.1442 0.0515

30 42.67 0.00 0.00 0.0000 3373.60 0.0000 30 23.51 10.01 0.1063 0.0458

40 27.44 0.00 0.00 0.0000 2579.42 0.0000 40 15.12 6.44 0.0683 0.0350

50 19.05 0.00 0.00 0.0000 2118.71 0.0000 50 10.50 4.47 0.0474 0.0288

60 13.97 0.00 0.00 0.0000 1819.33 0.0000 60 7.70 3.28 0.0348 0.0247

80 8.44 0.00 0.00 0.0000 1377.52 0.0000 80 4.65 1.98 0.0210 0.0187

100 5.64 0.00 0.00 0.0000 1077.14 0.0000 100 3.11 1.32 0.0140 0.0146

150 2.66 0.00 0.00 0.0000 649.65 0.0000 150 1.47 0.62 0.0066 0.0088

200 1.55 0.00 0.00 0.0000 438.54 0.0000 200 0.85 0.36 0.0039 0.0060

250 1.01 0.00 0.00 0.0000 319.33 0.0000 250 0.56 0.24 0.0025 0.0043

500 0.26 0.00 0.00 0.0000 113.98 0.0000 500 0.14 0.06 0.0006 0.0015

1000 0.07 0.00 0.00 0.0000 40.48 0.0000 1000 0.04 0.02 0.0002 0.0005

D-100
Facility G-02 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Mather

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1198 op hrs/wk: 57 Acu Rate [g/s]: 0.0898

Ann Rate [g/s]: 0.0630 Ann Rate [g/s]: 0.0473

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 57.90 21.52 9.16 0.1042 3794.23 0.0227 20 57.90 2.74 1.17 0.0009 3794.23 0.0243

30 42.67 15.86 6.75 0.0768 3373.60 0.0202 30 42.67 2.02 0.86 0.0007 3373.60 0.0216

40 27.44 10.20 4.34 0.0494 2579.42 0.0155 40 27.44 1.30 0.55 0.0004 2579.42 0.0165

50 19.05 7.08 3.01 0.0343 2118.71 0.0127 50 19.05 0.90 0.38 0.0003 2118.71 0.0136

60 13.97 5.19 2.21 0.0251 1819.33 0.0109 60 13.97 0.66 0.28 0.0002 1819.33 0.0117

80 8.44 3.14 1.34 0.0152 1377.52 0.0083 80 8.44 0.40 0.17 0.0001 1377.52 0.0088

100 5.64 2.10 0.89 0.0102 1077.14 0.0065 100 5.64 0.27 0.11 0.0001 1077.14 0.0069

150 2.66 0.99 0.42 0.0048 649.65 0.0039 150 2.66 0.13 0.05 4.2E-05 649.65 0.0042

200 1.55 0.58 0.25 0.0028 438.54 0.0026 200 1.55 0.07 0.03 2.4E-05 438.54 0.0028

250 1.01 0.38 0.16 0.0018 319.33 0.0019 250 1.01 0.05 0.02 1.6E-05 319.33 0.0020

500 0.26 0.10 0.04 0.0005 113.98 0.0007 500 0.26 0.01 0.01 4.1E-06 113.98 0.0007

1000 0.07 0.03 0.01 0.0001 40.48 0.0002 1000 0.07 0.00 0.00 1.1E-06 40.48 0.0003

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0599

Ann Rate [g/s]: 0.0315

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 57.90 3.65 1.55 0.0028 3794.23 0.0000 20 27.91 11.88 0.1080 0.0471

30 42.67 2.69 1.14 0.0021 3373.60 0.0000 30 20.57 8.75 0.0796 0.0418

40 27.44 1.73 0.74 0.0014 2579.42 0.0000 40 13.23 5.63 0.0512 0.0320

50 19.05 1.20 0.51 0.0009 2118.71 0.0000 50 9.18 3.91 0.0355 0.0263

60 13.97 0.88 0.37 0.0007 1819.33 0.0000 60 6.73 2.87 0.0261 0.0226

80 8.44 0.53 0.23 0.0004 1377.52 0.0000 80 4.07 1.73 0.0157 0.0171

100 5.64 0.36 0.15 0.0003 1077.14 0.0000 100 2.72 1.16 0.0105 0.0134

150 2.66 0.17 0.07 0.0001 649.65 0.0000 150 1.28 0.55 0.0050 0.0081

200 1.55 0.10 0.04 0.0001 438.54 0.0000 200 0.75 0.32 0.0029 0.0054

250 1.01 0.06 0.03 5.0E-05 319.33 0.0000 250 0.49 0.21 0.0019 0.0040

500 0.26 0.02 0.01 1.3E-05 113.98 0.0000 500 0.13 0.05 0.0005 0.0014

1000 0.07 0.00 0.00 3.4E-06 40.48 0.0000 1000 0.03 0.01 0.0001 0.0005

D-101
Facility G-02 - 55% Perc, 43% TCE

Met Set: Mather

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 57.90 29.62 12.61 0.1434 3794.23 0.0312 20 57.90 0.00 0.00 0.0000 3794.23 0.0000

30 42.67 21.83 9.29 0.1057 3373.60 0.0278 30 42.67 0.00 0.00 0.0000 3373.60 0.0000

40 27.44 14.04 5.98 0.0680 2579.42 0.0212 40 27.44 0.00 0.00 0.0000 2579.42 0.0000

50 19.05 9.74 4.15 0.0472 2118.71 0.0174 50 19.05 0.00 0.00 0.0000 2118.71 0.0000

60 13.97 7.15 3.04 0.0346 1819.33 0.0150 60 13.97 0.00 0.00 0.0000 1819.33 0.0000

80 8.44 4.32 1.84 0.0209 1377.52 0.0113 80 8.44 0.00 0.00 0.0000 1377.52 0.0000

100 5.64 2.89 1.23 0.0140 1077.14 0.0089 100 5.64 0.00 0.00 0.0000 1077.14 0.0000

150 2.66 1.36 0.58 0.0066 649.65 0.0053 150 2.66 0.00 0.00 0.0000 649.65 0.0000

200 1.55 0.79 0.34 0.0038 438.54 0.0036 200 1.55 0.00 0.00 0.0000 438.54 0.0000

250 1.01 0.52 0.22 0.0025 319.33 0.0026 250 1.01 0.00 0.00 0.0000 319.33 0.0000

500 0.26 0.13 0.06 0.0006 113.98 0.0009 500 0.26 0.00 0.00 0.0000 113.98 0.0000

1000 0.07 0.04 0.02 0.0002 40.48 0.0003 1000 0.07 0.00 0.00 0.0000 40.48 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.1288

Ann Rate [g/s]: 0.0677

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 57.90 7.84 3.34 0.0061 3794.23 0.0000 20 37.46 15.94 0.1496 0.0312

30 42.67 5.78 2.46 0.0045 3373.60 0.0000 30 27.60 11.75 0.1102 0.0278

40 27.44 3.72 1.58 0.0029 2579.42 0.0000 40 17.75 7.56 0.0709 0.0212

50 19.05 2.58 1.10 0.0020 2118.71 0.0000 50 12.32 5.25 0.0492 0.0174

60 13.97 1.89 0.81 0.0015 1819.33 0.0000 60 9.04 3.85 0.0361 0.0150

80 8.44 1.14 0.49 0.0009 1377.52 0.0000 80 5.46 2.32 0.0218 0.0113

100 5.64 0.76 0.33 0.0006 1077.14 0.0000 100 3.65 1.55 0.0146 0.0089

150 2.66 0.36 0.15 0.0003 649.65 0.0000 150 1.72 0.73 0.0069 0.0053

200 1.55 0.21 0.09 0.0002 438.54 0.0000 200 1.00 0.43 0.0040 0.0036

250 1.01 0.14 0.06 0.0001 319.33 0.0000 250 0.65 0.28 0.0026 0.0026

500 0.26 0.04 0.01 2.8E-05 113.98 0.0000 500 0.17 0.07 0.0007 0.0009

1000 0.07 0.01 0.00 7.4E-06 40.48 0.0000 1000 0.05 0.02 0.0002 0.0003

D-102
Facility G-02 - 94% Perc

Met Set: Default -0

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 142.83 124.80 53.13 0.6044 5276.51 0.0743 20 142.83 0.00 0.00 0.0000 5276.51 0.0000

30 117.98 103.09 43.88 0.4992 4358.64 0.0613 30 117.98 0.00 0.00 0.0000 4358.64 0.0000

40 98.78 86.31 36.74 0.4180 3649.09 0.0514 40 98.78 0.00 0.00 0.0000 3649.09 0.0000

50 83.77 73.20 31.16 0.3545 3094.79 0.0436 50 83.77 0.00 0.00 0.0000 3094.79 0.0000

60 71.89 62.82 26.74 0.3042 2656.01 0.0374 60 71.89 0.00 0.00 0.0000 2656.01 0.0000

80 54.62 47.72 20.31 0.2311 2017.70 0.0284 80 54.62 0.00 0.00 0.0000 2017.70 0.0000

100 42.94 37.52 15.97 0.1817 1586.22 0.0223 100 42.94 0.00 0.00 0.0000 1586.22 0.0000

150 26.25 22.94 9.76 0.1111 969.72 0.0136 150 26.25 0.00 0.00 0.0000 969.72 0.0000

200 17.86 15.61 6.64 0.0756 659.99 0.0093 200 17.86 0.00 0.00 0.0000 659.99 0.0000

250 13.05 11.40 4.85 0.0552 482.19 0.0068 250 13.05 0.00 0.00 0.0000 482.19 0.0000

500 4.69 4.10 1.75 0.0199 173.33 0.0024 500 4.69 0.00 0.00 0.0000 173.33 0.0000

1000 1.68 1.46 0.62 0.0071 61.90 0.0009 1000 1.68 0.00 0.00 0.0000 61.90 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 142.83 0.00 0.00 0.0000 5276.51 0.0000 20 124.80 53.13 0.6044 0.0743

30 117.98 0.00 0.00 0.0000 4358.64 0.0000 30 103.09 43.88 0.4992 0.0613

40 98.78 0.00 0.00 0.0000 3649.09 0.0000 40 86.31 36.74 0.4180 0.0514

50 83.77 0.00 0.00 0.0000 3094.79 0.0000 50 73.20 31.16 0.3545 0.0436

60 71.89 0.00 0.00 0.0000 2656.01 0.0000 60 62.82 26.74 0.3042 0.0374

80 54.62 0.00 0.00 0.0000 2017.70 0.0000 80 47.72 20.31 0.2311 0.0284

100 42.94 0.00 0.00 0.0000 1586.22 0.0000 100 37.52 15.97 0.1817 0.0223

150 26.25 0.00 0.00 0.0000 969.72 0.0000 150 22.94 9.76 0.1111 0.0136

200 17.86 0.00 0.00 0.0000 659.99 0.0000 200 15.61 6.64 0.0756 0.0093

250 13.05 0.00 0.00 0.0000 482.19 0.0000 250 11.40 4.85 0.0552 0.0068

500 4.69 0.00 0.00 0.0000 173.33 0.0000 500 4.10 1.75 0.0199 0.0024

1000 1.68 0.00 0.00 0.0000 61.90 0.0000 1000 1.46 0.62 0.0071 0.0009

D-103
Facility G-02 - 55% Perc, 25% MeCl

Met Set: Default -0

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0.0749

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0.0394

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 142.83 73.06 31.10 0.3538 5276.51 0.0435 20 142.83 5.63 2.40 0.0019 5276.51 0.0282

30 117.98 60.35 25.69 0.2923 4358.64 0.0359 30 117.98 4.65 1.98 0.0015 4358.64 0.0233

40 98.78 50.53 21.51 0.2447 3649.09 0.0301 40 98.78 3.89 1.66 0.0013 3649.09 0.0195

50 83.77 42.85 18.24 0.2075 3094.79 0.0255 50 83.77 3.30 1.40 0.0011 3094.79 0.0166

60 71.89 36.78 15.65 0.1781 2656.01 0.0219 60 71.89 2.83 1.21 0.0009 2656.01 0.0142

80 54.62 27.94 11.89 0.1353 2017.70 0.0166 80 54.62 2.15 0.92 0.0007 2017.70 0.0108

100 42.94 21.96 9.35 0.1064 1586.22 0.0131 100 42.94 1.69 0.72 0.0006 1586.22 0.0085

150 26.25 13.43 5.72 0.0650 969.72 0.0080 150 26.25 1.03 0.44 0.0003 969.72 0.0052

200 17.86 9.14 3.89 0.0443 659.99 0.0054 200 17.86 0.70 0.30 0.0002 659.99 0.0035

250 13.05 6.68 2.84 0.0323 482.19 0.0040 250 13.05 0.51 0.22 0.0002 482.19 0.0026

500 4.69 2.40 1.02 0.0116 173.33 0.0014 500 4.69 0.18 0.08 0.0001 173.33 0.0009

1000 1.68 0.86 0.36 0.0042 61.90 0.0005 1000 1.68 0.07 0.03 2.2E-05 61.90 0.0003

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 142.83 0.00 0.00 0.0000 5276.51 0.0000 20 78.69 33.50 0.3557 0.0717

30 117.98 0.00 0.00 0.0000 4358.64 0.0000 30 65.00 27.67 0.2938 0.0592

40 98.78 0.00 0.00 0.0000 3649.09 0.0000 40 54.42 23.16 0.2460 0.0496

50 83.77 0.00 0.00 0.0000 3094.79 0.0000 50 46.15 19.65 0.2086 0.0420

60 71.89 0.00 0.00 0.0000 2656.01 0.0000 60 39.61 16.86 0.1790 0.0361

80 54.62 0.00 0.00 0.0000 2017.70 0.0000 80 30.09 12.81 0.1360 0.0274

100 42.94 0.00 0.00 0.0000 1586.22 0.0000 100 23.66 10.07 0.1069 0.0215

150 26.25 0.00 0.00 0.0000 969.72 0.0000 150 14.46 6.16 0.0654 0.0132

200 17.86 0.00 0.00 0.0000 659.99 0.0000 200 9.84 4.19 0.0445 0.0090

250 13.05 0.00 0.00 0.0000 482.19 0.0000 250 7.19 3.06 0.0325 0.0066

500 4.69 0.00 0.00 0.0000 173.33 0.0000 500 2.58 1.10 0.0117 0.0024

1000 1.68 0.00 0.00 0.0000 61.90 0.0000 1000 0.92 0.39 0.0042 0.0008

D-104
Facility G-02 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Default -0

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1198 op hrs/wk: 57 Acu Rate [g/s]: 0.0898

Ann Rate [g/s]: 0.0630 Ann Rate [g/s]: 0.0473

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 142.83 53.09 22.60 0.2571 5276.51 0.0316 20 142.83 6.76 2.88 0.0023 5276.51 0.0338

30 117.98 43.85 18.67 0.2124 4358.64 0.0261 30 117.98 5.58 2.38 0.0019 4358.64 0.0280

40 98.78 36.71 15.63 0.1778 3649.09 0.0219 40 98.78 4.67 1.99 0.0016 3649.09 0.0234

50 83.77 31.14 13.25 0.1508 3094.79 0.0185 50 83.77 3.96 1.69 0.0013 3094.79 0.0199

60 71.89 26.72 11.38 0.1294 2656.01 0.0159 60 71.89 3.40 1.45 0.0011 2656.01 0.0170

80 54.62 20.30 8.64 0.0983 2017.70 0.0121 80 54.62 2.58 1.10 0.0009 2017.70 0.0129

100 42.94 15.96 6.79 0.0773 1586.22 0.0095 100 42.94 2.03 0.86 0.0007 1586.22 0.0102

150 26.25 9.76 4.15 0.0472 969.72 0.0058 150 26.25 1.24 0.53 0.0004 969.72 0.0062

200 17.86 6.64 2.83 0.0322 659.99 0.0040 200 17.86 0.85 0.36 0.0003 659.99 0.0042

250 13.05 4.85 2.07 0.0235 482.19 0.0029 250 13.05 0.62 0.26 0.0002 482.19 0.0031

500 4.69 1.74 0.74 0.0084 173.33 0.0010 500 4.69 0.22 0.09 0.0001 173.33 0.0011

1000 1.68 0.62 0.27 0.0030 61.90 0.0004 1000 1.68 0.08 0.03 2.6E-05 61.90 0.0004

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0599

Ann Rate [g/s]: 0.0315

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 142.83 9.00 3.83 0.0070 5276.51 0.0000 20 68.84 29.30 0.2664 0.0655

30 117.98 7.43 3.16 0.0058 4358.64 0.0000 30 56.87 24.21 0.2200 0.0541

40 98.78 6.22 2.65 0.0049 3649.09 0.0000 40 47.61 20.27 0.1842 0.0453

50 83.77 5.28 2.25 0.0041 3094.79 0.0000 50 40.38 17.19 0.1562 0.0384

60 71.89 4.53 1.93 0.0035 2656.01 0.0000 60 34.65 14.75 0.1341 0.0329

80 54.62 3.44 1.46 0.0027 2017.70 0.0000 80 26.32 11.21 0.1019 0.0250

100 42.94 2.71 1.15 0.0021 1586.22 0.0000 100 20.70 8.81 0.0801 0.0197

150 26.25 1.65 0.70 0.0013 969.72 0.0000 150 12.65 5.39 0.0490 0.0120

200 17.86 1.13 0.48 0.0009 659.99 0.0000 200 8.61 3.67 0.0333 0.0082

250 13.05 0.82 0.35 0.0006 482.19 0.0000 250 6.29 2.68 0.0243 0.0060

500 4.69 0.30 0.13 0.0002 173.33 0.0000 500 2.26 0.96 0.0088 0.0022

1000 1.68 0.11 0.04 0.0001 61.90 0.0000 1000 0.81 0.34 0.0031 0.0008

D-105
Facility G-02 - 55% Perc, 43% TCE

Met Set: Default -0

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 142.83 73.06 31.10 0.3538 5276.51 0.0435 20 142.83 0.00 0.00 0.0000 5276.51 0.0000

30 117.98 60.35 25.69 0.2923 4358.64 0.0359 30 117.98 0.00 0.00 0.0000 4358.64 0.0000

40 98.78 50.53 21.51 0.2447 3649.09 0.0301 40 98.78 0.00 0.00 0.0000 3649.09 0.0000

50 83.77 42.85 18.24 0.2075 3094.79 0.0255 50 83.77 0.00 0.00 0.0000 3094.79 0.0000

60 71.89 36.78 15.65 0.1781 2656.01 0.0219 60 71.89 0.00 0.00 0.0000 2656.01 0.0000

80 54.62 27.94 11.89 0.1353 2017.70 0.0166 80 54.62 0.00 0.00 0.0000 2017.70 0.0000

100 42.94 21.96 9.35 0.1064 1586.22 0.0131 100 42.94 0.00 0.00 0.0000 1586.22 0.0000

150 26.25 13.43 5.72 0.0650 969.72 0.0080 150 26.25 0.00 0.00 0.0000 969.72 0.0000

200 17.86 9.14 3.89 0.0443 659.99 0.0054 200 17.86 0.00 0.00 0.0000 659.99 0.0000

250 13.05 6.68 2.84 0.0323 482.19 0.0040 250 13.05 0.00 0.00 0.0000 482.19 0.0000

500 4.69 2.40 1.02 0.0116 173.33 0.0014 500 4.69 0.00 0.00 0.0000 173.33 0.0000

1000 1.68 0.86 0.36 0.0042 61.90 0.0005 1000 1.68 0.00 0.00 0.0000 61.90 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.1288

Ann Rate [g/s]: 0.0677

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 142.83 19.34 8.23 0.0151 5276.51 0.0000 20 92.40 39.33 0.3689 0.0435

30 117.98 15.97 6.80 0.0125 4358.64 0.0000 30 76.33 32.49 0.3047 0.0359

40 98.78 13.37 5.69 0.0104 3649.09 0.0000 40 63.90 27.20 0.2551 0.0301

50 83.77 11.34 4.83 0.0089 3094.79 0.0000 50 54.19 23.07 0.2164 0.0255

60 71.89 9.73 4.14 0.0076 2656.01 0.0000 60 46.51 19.80 0.1857 0.0219

80 54.62 7.40 3.15 0.0058 2017.70 0.0000 80 35.33 15.04 0.1411 0.0166

100 42.94 5.81 2.47 0.0045 1586.22 0.0000 100 27.78 11.82 0.1109 0.0131

150 26.25 3.55 1.51 0.0028 969.72 0.0000 150 16.98 7.23 0.0678 0.0080

200 17.86 2.42 1.03 0.0019 659.99 0.0000 200 11.56 4.92 0.0461 0.0054

250 13.05 1.77 0.75 0.0014 482.19 0.0000 250 8.44 3.59 0.0337 0.0040

500 4.69 0.64 0.27 0.0005 173.33 0.0000 500 3.04 1.29 0.0121 0.0014

1000 1.68 0.23 0.10 0.0002 61.90 0.0000 1000 1.08 0.46 0.0043 0.0005

D-106
Risk Assessment Summary - 3 Generic Facilities

Multicomponent Impacts - Brake Cleaners - Chronic/Cancer

Facility G-03 - 94% Perc

Met Set: Burbank

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 17.91 15.65 6.66 0.0758 1344.25 0.0189 20 17.91 0.00 0.00 0.0000 1344.25 0.0000

30 42.20 36.87 15.70 0.1786 1964.95 0.0277 30 42.20 0.00 0.00 0.0000 1964.95 0.0000

40 35.87 31.34 13.34 0.1518 1702.10 0.0240 40 35.87 0.00 0.00 0.0000 1702.10 0.0000

50 33.01 28.84 12.28 0.1397 2640.90 0.0372 50 33.01 0.00 0.00 0.0000 2640.90 0.0000

60 26.91 23.51 10.01 0.1139 2498.24 0.0352 60 26.91 0.00 0.00 0.0000 2498.24 0.0000

80 15.68 13.70 5.83 0.0663 1915.64 0.0270 80 15.68 0.00 0.00 0.0000 1915.64 0.0000

100 10.28 8.98 3.82 0.0435 1511.07 0.0213 100 10.28 0.00 0.00 0.0000 1511.07 0.0000

150 4.76 4.16 1.77 0.0201 927.46 0.0131 150 4.76 0.00 0.00 0.0000 927.46 0.0000

200 2.75 2.40 1.02 0.0116 633.44 0.0089 200 2.75 0.00 0.00 0.0000 633.44 0.0000

250 1.79 1.56 0.67 0.0076 464.37 0.0065 250 1.79 0.00 0.00 0.0000 464.37 0.0000

500 0.47 0.41 0.17 0.0020 169.00 0.0024 500 0.47 0.00 0.00 0.0000 169.00 0.0000

1000 0.12 0.10 0.04 0.0005 61.00 0.0009 1000 0.12 0.00 0.00 0.0000 61.00 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 17.91 0.00 0.00 0.0000 1344.25 0.0000 20 15.65 6.66 0.0758 0.0189

30 42.20 0.00 0.00 0.0000 1964.95 0.0000 30 36.87 15.70 0.1786 0.0277

40 35.87 0.00 0.00 0.0000 1702.10 0.0000 40 31.34 13.34 0.1518 0.0240

50 33.01 0.00 0.00 0.0000 2640.90 0.0000 50 28.84 12.28 0.1397 0.0372

60 26.91 0.00 0.00 0.0000 2498.24 0.0000 60 23.51 10.01 0.1139 0.0352

80 15.68 0.00 0.00 0.0000 1915.64 0.0000 80 13.70 5.83 0.0663 0.0270

100 10.28 0.00 0.00 0.0000 1511.07 0.0000 100 8.98 3.82 0.0435 0.0213

150 4.76 0.00 0.00 0.0000 927.46 0.0000 150 4.16 1.77 0.0201 0.0131

200 2.75 0.00 0.00 0.0000 633.44 0.0000 200 2.40 1.02 0.0116 0.0089

250 1.79 0.00 0.00 0.0000 464.37 0.0000 250 1.56 0.67 0.0076 0.0065

500 0.47 0.00 0.00 0.0000 169.00 0.0000 500 0.41 0.17 0.0020 0.0024

1000 0.12 0.00 0.00 0.0000 61.00 0.0000 1000 0.10 0.04 0.0005 0.0009

D-107
Facility G-03 - 55% Perc, 25% MeCl

Met Set: Burbank

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0.0749

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0.0394

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 17.91 9.16 3.90 0.0444 1344.25 0.0111 20 17.91 0.71 0.30 0.0002 1344.25 0.0072

30 42.20 21.59 9.19 0.1045 1964.95 0.0162 30 42.20 1.66 0.71 0.0006 1964.95 0.0105

40 35.87 18.35 7.81 0.0889 1702.10 0.0140 40 35.87 1.41 0.60 0.0005 1702.10 0.0091

50 33.01 16.89 7.19 0.0818 2640.90 0.0217 50 33.01 1.30 0.55 0.0004 2640.90 0.0141

60 26.91 13.77 5.86 0.0667 2498.24 0.0206 60 26.91 1.06 0.45 0.0004 2498.24 0.0134

80 15.68 8.02 3.41 0.0388 1915.64 0.0158 80 15.68 0.62 0.26 0.0002 1915.64 0.0102

100 10.28 5.26 2.24 0.0255 1511.07 0.0124 100 10.28 0.41 0.17 0.0001 1511.07 0.0081

150 4.76 2.43 1.04 0.0118 927.46 0.0076 150 4.76 0.19 0.08 0.0001 927.46 0.0050

200 2.75 1.41 0.60 0.0068 633.44 0.0052 200 2.75 0.11 0.05 3.6E-05 633.44 0.0034

250 1.79 0.92 0.39 0.0044 464.37 0.0038 250 1.79 0.07 0.03 2.4E-05 464.37 0.0025

500 0.47 0.24 0.10 0.0012 169.00 0.0014 500 0.47 0.02 0.01 6.2E-06 169.00 0.0009

1000 0.12 0.06 0.03 0.0003 61.00 0.0005 1000 0.12 0.00 0.00 1.6E-06 61.00 0.0003

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 17.91 0.00 0.00 0.0000 1344.25 0.0000 20 9.87 4.20 0.0446 0.0183

30 42.20 0.00 0.00 0.0000 1964.95 0.0000 30 23.25 9.90 0.1051 0.0267

40 35.87 0.00 0.00 0.0000 1702.10 0.0000 40 19.76 8.41 0.0893 0.0231

50 33.01 0.00 0.00 0.0000 2640.90 0.0000 50 18.19 7.74 0.0822 0.0359

60 26.91 0.00 0.00 0.0000 2498.24 0.0000 60 14.83 6.31 0.0670 0.0339

80 15.68 0.00 0.00 0.0000 1915.64 0.0000 80 8.64 3.68 0.0390 0.0260

100 10.28 0.00 0.00 0.0000 1511.07 0.0000 100 5.66 2.41 0.0256 0.0205

150 4.76 0.00 0.00 0.0000 927.46 0.0000 150 2.62 1.12 0.0119 0.0126

200 2.75 0.00 0.00 0.0000 633.44 0.0000 200 1.52 0.64 0.0068 0.0086

250 1.79 0.00 0.00 0.0000 464.37 0.0000 250 0.99 0.42 0.0045 0.0063

500 0.47 0.00 0.00 0.0000 169.00 0.0000 500 0.26 0.11 0.0012 0.0023

1000 0.12 0.00 0.00 0.0000 61.00 0.0000 1000 0.07 0.03 0.0003 0.0008

D-108
Facility G-03 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Burbank

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1198 op hrs/wk: 57 Acu Rate [g/s]: 0.0898

Ann Rate [g/s]: 0.0630 Ann Rate [g/s]: 0.0473

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 17.91 6.66 2.83 0.0322 1344.25 0.0081 20 14.40 0.68 0.29 0.0002 1344.25 0.0086

30 42.20 15.69 6.68 0.0760 1964.95 0.0118 30 22.00 1.04 0.44 0.0003 1964.95 0.0126

40 35.87 13.33 5.68 0.0646 1702.10 0.0102 40 17.01 0.80 0.34 0.0003 1702.10 0.0109

50 33.01 12.27 5.22 0.0594 2640.90 0.0158 50 14.68 0.69 0.30 0.0002 2640.90 0.0169

60 26.91 10.00 4.26 0.0484 2498.24 0.0150 60 11.12 0.53 0.22 0.0002 2498.24 0.0160

80 15.68 5.83 2.48 0.0282 1915.64 0.0115 80 6.47 0.31 0.13 0.0001 1915.64 0.0123

100 10.28 3.82 1.63 0.0185 1511.07 0.0091 100 4.24 0.20 0.09 0.0001 1511.07 0.0097

150 4.76 1.77 0.75 0.0086 927.46 0.0056 150 1.88 0.09 0.04 3.0E-05 927.46 0.0059

200 2.75 1.02 0.44 0.0050 633.44 0.0038 200 1.05 0.05 0.02 1.7E-05 633.44 0.0041

250 1.79 0.67 0.28 0.0032 464.37 0.0028 250 0.67 0.03 0.01 1.0E-05 464.37 0.0030

500 0.47 0.17 0.07 0.0008 169.00 0.0010 500 0.17 0.01 0.00 2.8E-06 169.00 0.0011

1000 0.12 0.04 0.02 0.0002 61.00 0.0004 1000 0.04 0.00 0.00 7.0E-07 61.00 0.0004

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0599

Ann Rate [g/s]: 0.0315

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 17.91 1.13 0.48 0.0009 1344.25 0.0000 20 8.47 3.60 0.0333 0.0167

30 42.20 2.66 1.13 0.0021 1964.95 0.0000 30 19.38 8.25 0.0784 0.0244

40 35.87 2.26 0.96 0.0018 1702.10 0.0000 40 16.40 6.98 0.0666 0.0211

50 33.01 2.08 0.89 0.0016 2640.90 0.0000 50 15.04 6.40 0.0613 0.0328

60 26.91 1.70 0.72 0.0013 2498.24 0.0000 60 12.22 5.20 0.0499 0.0310

80 15.68 0.99 0.42 0.0008 1915.64 0.0000 80 7.12 3.03 0.0291 0.0238

100 10.28 0.65 0.28 0.0005 1511.07 0.0000 100 4.67 1.99 0.0191 0.0187

150 4.76 0.30 0.13 0.0002 927.46 0.0000 150 2.16 0.92 0.0088 0.0115

200 2.75 0.17 0.07 0.0001 633.44 0.0000 200 1.25 0.53 0.0051 0.0079

250 1.79 0.11 0.05 0.0001 464.37 0.0000 250 0.81 0.34 0.0033 0.0058

500 0.47 0.03 0.01 2.3E-05 169.00 0.0000 500 0.21 0.09 0.0009 0.0021

1000 0.12 0.01 0.00 5.9E-06 61.00 0.0000 1000 0.05 0.02 0.0002 0.0008

D-109
Facility G-03 - 55% Perc, 43% TCE

Met Set: Burbank

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 17.91 9.16 3.90 0.0444 1344.25 0.0111 20 17.91 0.00 0.00 0.0000 1344.25 0.0000

30 42.20 21.59 9.19 0.1045 1964.95 0.0162 30 42.20 0.00 0.00 0.0000 1964.95 0.0000

40 35.87 18.35 7.81 0.0889 1702.10 0.0140 40 35.87 0.00 0.00 0.0000 1702.10 0.0000

50 33.01 16.89 7.19 0.0818 2640.90 0.0217 50 33.01 0.00 0.00 0.0000 2640.90 0.0000

60 26.91 13.77 5.86 0.0667 2498.24 0.0206 60 26.91 0.00 0.00 0.0000 2498.24 0.0000

80 15.68 8.02 3.41 0.0388 1915.64 0.0158 80 15.68 0.00 0.00 0.0000 1915.64 0.0000

100 10.28 5.26 2.24 0.0255 1511.07 0.0124 100 10.28 0.00 0.00 0.0000 1511.07 0.0000

150 4.76 2.43 1.04 0.0118 927.46 0.0076 150 4.76 0.00 0.00 0.0000 927.46 0.0000

200 2.75 1.41 0.60 0.0068 633.44 0.0052 200 2.75 0.00 0.00 0.0000 633.44 0.0000

250 1.79 0.92 0.39 0.0044 464.37 0.0038 250 1.79 0.00 0.00 0.0000 464.37 0.0000

500 0.47 0.24 0.10 0.0012 169.00 0.0014 500 0.47 0.00 0.00 0.0000 169.00 0.0000

1000 0.12 0.06 0.03 0.0003 61.00 0.0005 1000 0.12 0.00 0.00 0.0000 61.00 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.1288

Ann Rate [g/s]: 0.0677

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 17.91 2.43 1.03 0.0019 1344.25 0.0000 20 11.59 4.93 0.0463 0.0111

30 42.20 5.71 2.43 0.0045 1964.95 0.0000 30 27.30 11.62 0.1090 0.0162

40 35.87 4.86 2.07 0.0038 1702.10 0.0000 40 23.21 9.88 0.0926 0.0140

50 33.01 4.47 1.90 0.0035 2640.90 0.0000 50 21.36 9.09 0.0853 0.0217

60 26.91 3.64 1.55 0.0028 2498.24 0.0000 60 17.41 7.41 0.0695 0.0206

80 15.68 2.12 0.90 0.0017 1915.64 0.0000 80 10.14 4.32 0.0405 0.0158

100 10.28 1.39 0.59 0.0011 1511.07 0.0000 100 6.65 2.83 0.0266 0.0124

150 4.76 0.64 0.27 0.0005 927.46 0.0000 150 3.08 1.31 0.0123 0.0076

200 2.75 0.37 0.16 0.0003 633.44 0.0000 200 1.78 0.76 0.0071 0.0052

250 1.79 0.24 0.10 0.0002 464.37 0.0000 250 1.16 0.49 0.0046 0.0038

500 0.47 0.06 0.03 5.0E-05 169.00 0.0000 500 0.30 0.13 0.0012 0.0014

1000 0.12 0.02 0.01 1.3E-05 61.00 0.0000 1000 0.08 0.03 0.0003 0.0005

D-110
Facility G-03 - 94% Perc

Met Set: Anaheim

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 31.15 27.22 11.59 0.1318 1343.62 0.0189 20 31.15 0.00 0.00 0.0000 1343.62 0.0000

30 57.73 50.44 21.47 0.2443 1964.47 0.0276 30 57.73 0.00 0.00 0.0000 1964.47 0.0000

40 44.96 39.29 16.72 0.1902 1701.54 0.0239 40 44.96 0.00 0.00 0.0000 1701.54 0.0000

50 41.98 36.68 15.61 0.1776 2643.73 0.0372 50 41.98 0.00 0.00 0.0000 2643.73 0.0000

60 35.48 31.00 13.20 0.1501 2497.42 0.0352 60 35.48 0.00 0.00 0.0000 2497.42 0.0000

80 20.76 18.14 7.72 0.0878 1914.71 0.0269 80 20.76 0.00 0.00 0.0000 1914.71 0.0000

100 13.59 11.87 5.05 0.0575 1510.10 0.0213 100 13.59 0.00 0.00 0.0000 1510.10 0.0000

150 6.26 5.47 2.33 0.0265 926.57 0.0130 150 6.26 0.00 0.00 0.0000 926.57 0.0000

200 3.60 3.15 1.34 0.0152 632.67 0.0089 200 3.60 0.00 0.00 0.0000 632.67 0.0000

250 2.34 2.04 0.87 0.0099 463.72 0.0065 250 2.34 0.00 0.00 0.0000 463.72 0.0000

500 0.61 0.53 0.23 0.0026 168.65 0.0024 500 0.61 0.00 0.00 0.0000 168.65 0.0000

1000 0.16 0.14 0.06 0.0007 60.83 0.0009 1000 0.16 0.00 0.00 0.0000 60.83 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 31.15 0.00 0.00 0.0000 1343.62 0.0000 20 27.22 11.59 0.1318 0.0189

30 57.73 0.00 0.00 0.0000 1964.47 0.0000 30 50.44 21.47 0.2443 0.0276

40 44.96 0.00 0.00 0.0000 1701.54 0.0000 40 39.29 16.72 0.1902 0.0239

50 41.98 0.00 0.00 0.0000 2643.73 0.0000 50 36.68 15.61 0.1776 0.0372

60 35.48 0.00 0.00 0.0000 2497.42 0.0000 60 31.00 13.20 0.1501 0.0352

80 20.76 0.00 0.00 0.0000 1914.71 0.0000 80 18.14 7.72 0.0878 0.0269

100 13.59 0.00 0.00 0.0000 1510.10 0.0000 100 11.87 5.05 0.0575 0.0213

150 6.26 0.00 0.00 0.0000 926.57 0.0000 150 5.47 2.33 0.0265 0.0130

200 3.60 0.00 0.00 0.0000 632.67 0.0000 200 3.15 1.34 0.0152 0.0089

250 2.34 0.00 0.00 0.0000 463.72 0.0000 250 2.04 0.87 0.0099 0.0065

500 0.61 0.00 0.00 0.0000 168.65 0.0000 500 0.53 0.23 0.0026 0.0024

1000 0.16 0.00 0.00 0.0000 60.83 0.0000 1000 0.14 0.06 0.0007 0.0009

D-111
Facility G-03 - 55% Perc, 25% MeCl

Met Set: Anaheim

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0.0749

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0.0394

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 31.15 15.93 6.78 0.0772 1343.62 0.0111 20 31.15 1.23 0.52 0.0004 1343.62 0.0072

30 57.73 29.53 12.57 0.1430 1964.47 0.0162 30 57.73 2.27 0.97 0.0008 1964.47 0.0105

40 44.96 23.00 9.79 0.1114 1701.54 0.0140 40 44.96 1.77 0.75 0.0006 1701.54 0.0091

50 41.98 21.47 9.14 0.1040 2643.73 0.0218 50 41.98 1.65 0.70 0.0006 2643.73 0.0141

60 35.48 18.15 7.73 0.0879 2497.42 0.0206 60 35.48 1.40 0.60 0.0005 2497.42 0.0134

80 20.76 10.62 4.52 0.0514 1914.71 0.0158 80 20.76 0.82 0.35 0.0003 1914.71 0.0102

100 13.59 6.95 2.96 0.0337 1510.10 0.0124 100 13.59 0.54 0.23 0.0002 1510.10 0.0081

150 6.26 3.20 1.36 0.0155 926.57 0.0076 150 6.26 0.25 0.10 0.0001 926.57 0.0050

200 3.60 1.84 0.78 0.0089 632.67 0.0052 200 3.60 0.14 0.06 4.7E-05 632.67 0.0034

250 2.34 1.20 0.51 0.0058 463.72 0.0038 250 2.34 0.09 0.04 3.1E-05 463.72 0.0025

500 0.61 0.31 0.13 0.0015 168.65 0.0014 500 0.61 0.02 0.01 8.0E-06 168.65 0.0009

1000 0.16 0.08 0.03 0.0004 60.83 0.0005 1000 0.16 0.01 0.00 2.1E-06 60.83 0.0003

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 31.15 0.00 0.00 0.0000 1343.62 0.0000 20 17.16 7.31 0.0776 0.0183

30 57.73 0.00 0.00 0.0000 1964.47 0.0000 30 31.81 13.54 0.1438 0.0267

40 44.96 0.00 0.00 0.0000 1701.54 0.0000 40 24.77 10.54 0.1120 0.0231

50 41.98 0.00 0.00 0.0000 2643.73 0.0000 50 23.13 9.85 0.1045 0.0359

60 35.48 0.00 0.00 0.0000 2497.42 0.0000 60 19.55 8.32 0.0884 0.0339

80 20.76 0.00 0.00 0.0000 1914.71 0.0000 80 11.44 4.87 0.0517 0.0260

100 13.59 0.00 0.00 0.0000 1510.10 0.0000 100 7.49 3.19 0.0338 0.0205

150 6.26 0.00 0.00 0.0000 926.57 0.0000 150 3.45 1.47 0.0156 0.0126

200 3.60 0.00 0.00 0.0000 632.67 0.0000 200 1.98 0.84 0.0090 0.0086

250 2.34 0.00 0.00 0.0000 463.72 0.0000 250 1.29 0.55 0.0058 0.0063

500 0.61 0.00 0.00 0.0000 168.65 0.0000 500 0.34 0.14 0.0015 0.0023

1000 0.16 0.00 0.00 0.0000 60.83 0.0000 1000 0.09 0.04 0.0004 0.0008

D-112
Facility G-03 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Anaheim

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1198 op hrs/wk: 57 Acu Rate [g/s]: 0.0898

Ann Rate [g/s]: 0.0630 Ann Rate [g/s]: 0.0473

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 31.15 11.58 4.93 0.0561 1343.62 0.0080 20 31.15 1.47 0.63 0.0005 1343.62 0.0086

30 57.73 21.46 9.13 0.1039 1964.47 0.0118 30 57.73 2.73 1.16 0.0009 1964.47 0.0126

40 44.96 16.71 7.11 0.0809 1701.54 0.0102 40 44.96 2.13 0.91 0.0007 1701.54 0.0109

50 41.98 15.60 6.64 0.0756 2643.73 0.0158 50 41.98 1.99 0.85 0.0007 2643.73 0.0170

60 35.48 13.19 5.61 0.0639 2497.42 0.0150 60 35.48 1.68 0.71 0.0006 2497.42 0.0160

80 20.76 7.72 3.28 0.0374 1914.71 0.0115 80 20.76 0.98 0.42 0.0003 1914.71 0.0123

100 13.59 5.05 2.15 0.0245 1510.10 0.0090 100 13.59 0.64 0.27 0.0002 1510.10 0.0097

150 6.26 2.33 0.99 0.0113 926.57 0.0056 150 6.26 0.30 0.13 0.0001 926.57 0.0059

200 3.60 1.34 0.57 0.0065 632.67 0.0038 200 3.60 0.17 0.07 0.0001 632.67 0.0041

250 2.34 0.87 0.37 0.0042 463.72 0.0028 250 2.34 0.11 0.05 3.7E-05 463.72 0.0030

500 0.61 0.23 0.10 0.0011 168.65 0.0010 500 0.61 0.03 0.01 9.6E-06 168.65 0.0011

1000 0.16 0.06 0.03 0.0003 60.83 0.0004 1000 0.16 0.01 0.00 2.5E-06 60.83 0.0004

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0599

Ann Rate [g/s]: 0.0315

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 31.15 1.96 0.84 0.0015 1343.62 0.0000 20 15.01 6.39 0.0581 0.0167

30 57.73 3.64 1.55 0.0028 1964.47 0.0000 30 27.83 11.84 0.1077 0.0244

40 44.96 2.83 1.21 0.0022 1701.54 0.0000 40 21.67 9.22 0.0838 0.0211

50 41.98 2.64 1.13 0.0021 2643.73 0.0000 50 20.23 8.61 0.0783 0.0328

60 35.48 2.24 0.95 0.0017 2497.42 0.0000 60 17.10 7.28 0.0662 0.0310

80 20.76 1.31 0.56 0.0010 1914.71 0.0000 80 10.01 4.26 0.0387 0.0238

100 13.59 0.86 0.36 0.0007 1510.10 0.0000 100 6.55 2.79 0.0253 0.0187

150 6.26 0.39 0.17 0.0003 926.57 0.0000 150 3.02 1.28 0.0117 0.0115

200 3.60 0.23 0.10 0.0002 632.67 0.0000 200 1.74 0.74 0.0067 0.0078

250 2.34 0.15 0.06 0.0001 463.72 0.0000 250 1.13 0.48 0.0044 0.0058

500 0.61 0.04 0.02 3.0E-05 168.65 0.0000 500 0.29 0.13 0.0011 0.0021

1000 0.16 0.01 0.00 7.9E-06 60.83 0.0000 1000 0.08 0.03 0.0003 0.0008

D-113
Facility G-03 - 55% Perc, 43% TCE

Met Set: Anaheim

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 31.15 15.93 6.78 0.0772 1343.62 0.0111 20 31.15 0.00 0.00 0.0000 1343.62 0.0000

30 57.73 29.53 12.57 0.1430 1964.47 0.0162 30 57.73 0.00 0.00 0.0000 1964.47 0.0000

40 44.96 23.00 9.79 0.1114 1701.54 0.0140 40 44.96 0.00 0.00 0.0000 1701.54 0.0000

50 41.98 21.47 9.14 0.1040 2643.73 0.0218 50 41.98 0.00 0.00 0.0000 2643.73 0.0000

60 35.48 18.15 7.73 0.0879 2497.42 0.0206 60 35.48 0.00 0.00 0.0000 2497.42 0.0000

80 20.76 10.62 4.52 0.0514 1914.71 0.0158 80 20.76 0.00 0.00 0.0000 1914.71 0.0000

100 13.59 6.95 2.96 0.0337 1510.10 0.0124 100 13.59 0.00 0.00 0.0000 1510.10 0.0000

150 6.26 3.20 1.36 0.0155 926.57 0.0076 150 6.26 0.00 0.00 0.0000 926.57 0.0000

200 3.60 1.84 0.78 0.0089 632.67 0.0052 200 3.60 0.00 0.00 0.0000 632.67 0.0000

250 2.34 1.20 0.51 0.0058 463.72 0.0038 250 2.34 0.00 0.00 0.0000 463.72 0.0000

500 0.61 0.31 0.13 0.0015 168.65 0.0014 500 0.61 0.00 0.00 0.0000 168.65 0.0000

1000 0.16 0.08 0.03 0.0004 60.83 0.0005 1000 0.16 0.00 0.00 0.0000 60.83 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.1288

Ann Rate [g/s]: 0.0677

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 31.15 4.22 1.80 0.0033 1343.62 0.0000 20 20.15 8.58 0.0805 0.0111

30 57.73 7.82 3.33 0.0061 1964.47 0.0000 30 37.35 15.90 0.1491 0.0162

40 44.96 6.09 2.59 0.0048 1701.54 0.0000 40 29.09 12.38 0.1161 0.0140

50 41.98 5.68 2.42 0.0044 2643.73 0.0000 50 27.16 11.56 0.1084 0.0218

60 35.48 4.80 2.04 0.0038 2497.42 0.0000 60 22.95 9.77 0.0916 0.0206

80 20.76 2.81 1.20 0.0022 1914.71 0.0000 80 13.43 5.72 0.0536 0.0158

100 13.59 1.84 0.78 0.0014 1510.10 0.0000 100 8.79 3.74 0.0351 0.0124

150 6.26 0.85 0.36 0.0007 926.57 0.0000 150 4.05 1.72 0.0162 0.0076

200 3.60 0.49 0.21 0.0004 632.67 0.0000 200 2.33 0.99 0.0093 0.0052

250 2.34 0.32 0.13 0.0002 463.72 0.0000 250 1.51 0.64 0.0060 0.0038

500 0.61 0.08 0.04 0.0001 168.65 0.0000 500 0.39 0.17 0.0016 0.0014

1000 0.16 0.02 0.01 1.7E-05 60.83 0.0000 1000 0.10 0.04 0.0004 0.0005

D-114
Facility G-03 - 94% Perc

Met Set: Oakland

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 15.58 13.61 5.80 0.0659 1242.49 0.0175 20 15.58 0.00 0.00 0.0000 1242.49 0.0000

30 24.65 21.54 9.17 0.1043 1456.60 0.0205 30 24.65 0.00 0.00 0.0000 1456.60 0.0000

40 18.32 16.01 6.81 0.0775 1455.87 0.0205 40 18.32 0.00 0.00 0.0000 1455.87 0.0000

50 16.79 14.67 6.25 0.0710 1716.38 0.0242 50 16.79 0.00 0.00 0.0000 1716.38 0.0000

60 15.06 13.16 5.60 0.0637 1622.23 0.0228 60 15.06 0.00 0.00 0.0000 1622.23 0.0000

80 8.95 7.82 3.33 0.0379 1243.92 0.0175 80 8.95 0.00 0.00 0.0000 1243.92 0.0000

100 5.91 5.16 2.20 0.0250 981.21 0.0138 100 5.91 0.00 0.00 0.0000 981.21 0.0000

150 2.76 2.41 1.03 0.0117 669.93 0.0094 150 2.76 0.00 0.00 0.0000 669.93 0.0000

200 1.60 1.40 0.60 0.0068 487.14 0.0069 200 1.60 0.00 0.00 0.0000 487.14 0.0000

250 1.05 0.92 0.39 0.0044 367.88 0.0052 250 1.05 0.00 0.00 0.0000 367.88 0.0000

500 0.28 0.24 0.10 0.0012 145.98 0.0021 500 0.28 0.00 0.00 0.0000 145.98 0.0000

1000 0.07 0.06 0.03 0.0003 53.80 0.0008 1000 0.07 0.00 0.00 0.0000 53.80 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 15.58 0.00 0.00 0.0000 1242.49 0.0000 20 13.61 5.80 0.0659 0.0175

30 24.65 0.00 0.00 0.0000 1456.60 0.0000 30 21.54 9.17 0.1043 0.0205

40 18.32 0.00 0.00 0.0000 1455.87 0.0000 40 16.01 6.81 0.0775 0.0205

50 16.79 0.00 0.00 0.0000 1716.38 0.0000 50 14.67 6.25 0.0710 0.0242

60 15.06 0.00 0.00 0.0000 1622.23 0.0000 60 13.16 5.60 0.0637 0.0228

80 8.95 0.00 0.00 0.0000 1243.92 0.0000 80 7.82 3.33 0.0379 0.0175

100 5.91 0.00 0.00 0.0000 981.21 0.0000 100 5.16 2.20 0.0250 0.0138

150 2.76 0.00 0.00 0.0000 669.93 0.0000 150 2.41 1.03 0.0117 0.0094

200 1.60 0.00 0.00 0.0000 487.14 0.0000 200 1.40 0.60 0.0068 0.0069

250 1.05 0.00 0.00 0.0000 367.88 0.0000 250 0.92 0.39 0.0044 0.0052

500 0.28 0.00 0.00 0.0000 145.98 0.0000 500 0.24 0.10 0.0012 0.0021

1000 0.07 0.00 0.00 0.0000 53.80 0.0000 1000 0.06 0.03 0.0003 0.0008

D-115
Facility G-03 - 55% Perc, 25% MeCl

Met Set: Oakland

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0.0749

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0.0394

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 15.58 7.97 3.39 0.0659 1242.49 0.0102 20 15.58 0.61 0.26 0.0002 1242.49 0.0066

30 24.65 12.61 5.37 0.1043 1456.60 0.0120 30 24.65 0.97 0.41 0.0003 1456.60 0.0078

40 18.32 9.37 3.99 0.0775 1455.87 0.0120 40 18.32 0.72 0.31 0.0002 1455.87 0.0078

50 16.79 8.59 3.66 0.0710 1716.38 0.0141 50 16.79 0.66 0.28 0.0002 1716.38 0.0092

60 15.06 7.70 3.28 0.0637 1622.23 0.0134 60 15.06 0.59 0.25 0.0002 1622.23 0.0087

80 8.95 4.58 1.95 0.0379 1243.92 0.0102 80 8.95 0.35 0.15 0.0001 1243.92 0.0067

100 5.91 3.02 1.29 0.0250 981.21 0.0081 100 5.91 0.23 0.10 0.0001 981.21 0.0052

150 2.76 1.41 0.60 0.0117 669.93 0.0055 150 2.76 0.11 0.05 3.6E-05 669.93 0.0036

200 1.60 0.82 0.35 0.0068 487.14 0.0040 200 1.60 0.06 0.03 2.1E-05 487.14 0.0026

250 1.05 0.54 0.23 0.0044 367.88 0.0030 250 1.05 0.04 0.02 1.4E-05 367.88 0.0020

500 0.28 0.14 0.06 0.0012 145.98 0.0012 500 0.28 0.01 0.00 3.7E-06 145.98 0.0008

1000 0.07 0.04 0.02 0.0003 53.80 0.0004 1000 0.07 0.00 0.00 9.2E-07 53.80 0.0003

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 15.58 0.00 0.00 0.0000 1242.49 0.0000 20 8.58 3.65 0.0661 0.0169

30 24.65 0.00 0.00 0.0000 1456.60 0.0000 30 13.58 5.78 0.1046 0.0198

40 18.32 0.00 0.00 0.0000 1455.87 0.0000 40 10.09 4.30 0.0778 0.0198

50 16.79 0.00 0.00 0.0000 1716.38 0.0000 50 9.25 3.94 0.0713 0.0233

60 15.06 0.00 0.00 0.0000 1622.23 0.0000 60 8.30 3.53 0.0639 0.0220

80 8.95 0.00 0.00 0.0000 1243.92 0.0000 80 4.93 2.10 0.0380 0.0169

100 5.91 0.00 0.00 0.0000 981.21 0.0000 100 3.26 1.39 0.0251 0.0133

150 2.76 0.00 0.00 0.0000 669.93 0.0000 150 1.52 0.65 0.0117 0.0091

200 1.60 0.00 0.00 0.0000 487.14 0.0000 200 0.88 0.38 0.0068 0.0066

250 1.05 0.00 0.00 0.0000 367.88 0.0000 250 0.58 0.25 0.0045 0.0050

500 0.28 0.00 0.00 0.0000 145.98 0.0000 500 0.15 0.07 0.0012 0.0020

1000 0.07 0.00 0.00 0.0000 53.80 0.0000 1000 0.04 0.02 0.0003 0.0007

D-116
Facility G-03 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Oakland

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1198 op hrs/wk: 57 Acu Rate [g/s]: 0.0898

Ann Rate [g/s]: 0.0630 Ann Rate [g/s]: 0.0473

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 15.58 5.79 2.47 0.0280 1242.49 0.0074 20 15.58 0.74 0.31 0.0002 1242.49 0.0080

30 24.65 9.16 3.90 0.0444 1456.60 0.0087 30 24.65 1.17 0.50 0.0004 1456.60 0.0093

40 18.32 6.81 2.90 0.0330 1455.87 0.0087 40 18.32 0.87 0.37 0.0003 1455.87 0.0093

50 16.79 6.24 2.66 0.0302 1716.38 0.0103 50 16.79 0.79 0.34 0.0003 1716.38 0.0110

60 15.06 5.60 2.38 0.0271 1622.23 0.0097 60 15.06 0.71 0.30 0.0002 1622.23 0.0104

80 8.95 3.33 1.42 0.0161 1243.92 0.0075 80 8.95 0.42 0.18 0.0001 1243.92 0.0080

100 5.91 2.20 0.94 0.0106 981.21 0.0059 100 5.91 0.28 0.12 0.0001 981.21 0.0063

150 2.76 1.03 0.44 0.0050 669.93 0.0040 150 2.76 0.13 0.06 4.4E-05 669.93 0.0043

200 1.60 0.59 0.25 0.0029 487.14 0.0029 200 1.60 0.08 0.03 2.5E-05 487.14 0.0031

250 1.05 0.39 0.17 0.0019 367.88 0.0022 250 1.05 0.05 0.02 1.7E-05 367.88 0.0024

500 0.28 0.10 0.04 0.0005 145.98 0.0009 500 0.28 0.01 0.01 4.4E-06 145.98 0.0009

1000 0.07 0.03 0.01 0.0001 53.80 0.0003 1000 0.07 0.00 0.00 1.1E-06 53.80 0.0003

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0599

Ann Rate [g/s]: 0.0315

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 15.58 0.98 0.42 0.0008 1242.49 0.0000 20 7.51 3.20 0.0291 0.0154

30 24.65 1.55 0.66 0.0012 1456.60 0.0000 30 11.88 5.06 0.0460 0.0181

40 18.32 1.15 0.49 0.0009 1455.87 0.0000 40 8.83 3.76 0.0342 0.0181

50 16.79 1.06 0.45 0.0008 1716.38 0.0000 50 8.09 3.44 0.0313 0.0213

60 15.06 0.95 0.40 0.0007 1622.23 0.0000 60 7.26 3.09 0.0281 0.0201

80 8.95 0.56 0.24 0.0004 1243.92 0.0000 80 4.31 1.84 0.0167 0.0154

100 5.91 0.37 0.16 0.0003 981.21 0.0000 100 2.85 1.21 0.0110 0.0122

150 2.76 0.17 0.07 0.0001 669.93 0.0000 150 1.33 0.57 0.0051 0.0083

200 1.60 0.10 0.04 0.0001 487.14 0.0000 200 0.77 0.33 0.0030 0.0060

250 1.05 0.07 0.03 0.0001 367.88 0.0000 250 0.51 0.22 0.0020 0.0046

500 0.28 0.02 0.01 1.4E-05 145.98 0.0000 500 0.13 0.06 0.0005 0.0018

1000 0.07 0.00 0.00 3.4E-06 53.80 0.0000 1000 0.03 0.01 0.0001 0.0007

D-117
Facility G-03 - 55% Perc, 43% TCE

Met Set: Oakland

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 15.58 7.97 3.39 0.0386 1242.49 0.0102 20 15.58 0.00 0.00 0.0000 1242.49 0.0000

30 24.65 12.61 5.37 0.0611 1456.60 0.0120 30 24.65 0.00 0.00 0.0000 1456.60 0.0000

40 18.32 9.37 3.99 0.0454 1455.87 0.0120 40 18.32 0.00 0.00 0.0000 1455.87 0.0000

50 16.79 8.59 3.66 0.0416 1716.38 0.0141 50 16.79 0.00 0.00 0.0000 1716.38 0.0000

60 15.06 7.70 3.28 0.0373 1622.23 0.0134 60 15.06 0.00 0.00 0.0000 1622.23 0.0000

80 8.95 4.58 1.95 0.0222 1243.92 0.0102 80 8.95 0.00 0.00 0.0000 1243.92 0.0000

100 5.91 3.02 1.29 0.0146 981.21 0.0081 100 5.91 0.00 0.00 0.0000 981.21 0.0000

150 2.76 1.41 0.60 0.0068 669.93 0.0055 150 2.76 0.00 0.00 0.0000 669.93 0.0000

200 1.60 0.82 0.35 0.0040 487.14 0.0040 200 1.60 0.00 0.00 0.0000 487.14 0.0000

250 1.05 0.54 0.23 0.0026 367.88 0.0030 250 1.05 0.00 0.00 0.0000 367.88 0.0000

500 0.28 0.14 0.06 0.0007 145.98 0.0012 500 0.28 0.00 0.00 0.0000 145.98 0.0000

1000 0.07 0.04 0.02 0.0002 53.80 0.0004 1000 0.07 0.00 0.00 0.0000 53.80 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.1288

Ann Rate [g/s]: 0.0677

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 15.58 2.11 0.90 0.0016 1242.49 0.0000 20 10.08 4.29 0.0402 0.0102

30 24.65 3.34 1.42 0.0026 1456.60 0.0000 30 15.95 6.79 0.0637 0.0120

40 18.32 2.48 1.06 0.0019 1455.87 0.0000 40 11.85 5.05 0.0473 0.0120

50 16.79 2.27 0.97 0.0018 1716.38 0.0000 50 10.86 4.62 0.0434 0.0141

60 15.06 2.04 0.87 0.0016 1622.23 0.0000 60 9.74 4.15 0.0389 0.0134

80 8.95 1.21 0.52 0.0009 1243.92 0.0000 80 5.79 2.46 0.0231 0.0102

100 5.91 0.80 0.34 0.0006 981.21 0.0000 100 3.82 1.63 0.0153 0.0081

150 2.76 0.37 0.16 0.0003 669.93 0.0000 150 1.79 0.76 0.0071 0.0055

200 1.60 0.22 0.09 0.0002 487.14 0.0000 200 1.04 0.44 0.0041 0.0040

250 1.05 0.14 0.06 0.0001 367.88 0.0000 250 0.68 0.29 0.0027 0.0030

500 0.28 0.04 0.02 3.0E-05 145.98 0.0000 500 0.18 0.08 0.0007 0.0012

1000 0.07 0.01 0.00 7.4E-06 53.80 0.0000 1000 0.05 0.02 0.0002 0.0004

D-118
Facility G-03 - 94% Perc

Met Set: Default -0

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.30 64.92 27.64 0.3144 2744.96 0.0386 20 74.30 0.00 0.00 0.0000 2744.96 0.0000

30 64.57 56.42 24.02 0.2732 2385.45 0.0336 30 64.57 0.00 0.00 0.0000 2385.45 0.0000

40 56.52 49.39 21.02 0.2392 2088.05 0.0294 40 56.52 0.00 0.00 0.0000 2088.05 0.0000

50 49.84 43.55 18.54 0.2109 1841.40 0.0259 50 49.84 0.00 0.00 0.0000 1841.40 0.0000

60 44.27 38.69 16.47 0.1873 1635.59 0.0230 60 44.27 0.00 0.00 0.0000 1635.59 0.0000

80 35.62 31.13 13.25 0.1507 1315.96 0.0185 80 35.62 0.00 0.00 0.0000 1315.96 0.0000

100 29.32 25.62 10.90 0.1241 1083.10 0.0152 100 29.32 0.00 0.00 0.0000 1083.10 0.0000

150 19.45 17.00 7.24 0.0823 718.69 0.0101 150 19.45 0.00 0.00 0.0000 718.69 0.0000

200 13.97 12.21 5.20 0.0591 516.25 0.0073 200 13.97 0.00 0.00 0.0000 516.25 0.0000

250 10.61 9.27 3.94 0.0449 391.81 0.0055 250 10.61 0.00 0.00 0.0000 391.81 0.0000

500 4.18 3.66 1.56 0.0177 154.56 0.0022 500 4.18 0.00 0.00 0.0000 154.56 0.0000

1000 1.58 1.38 0.59 0.0067 58.40 0.0008 1000 1.58 0.00 0.00 0.0000 58.40 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 74.30 0.00 0.00 0.0000 2744.96 0.0000 20 64.92 27.64 0.3144 0.0386

30 64.57 0.00 0.00 0.0000 2385.45 0.0000 30 56.42 24.02 0.2732 0.0336

40 56.52 0.00 0.00 0.0000 2088.05 0.0000 40 49.39 21.02 0.2392 0.0294

50 49.84 0.00 0.00 0.0000 1841.40 0.0000 50 43.55 18.54 0.2109 0.0259

60 44.27 0.00 0.00 0.0000 1635.59 0.0000 60 38.69 16.47 0.1873 0.0230

80 35.62 0.00 0.00 0.0000 1315.96 0.0000 80 31.13 13.25 0.1507 0.0185

100 29.32 0.00 0.00 0.0000 1083.10 0.0000 100 25.62 10.90 0.1241 0.0152

150 19.45 0.00 0.00 0.0000 718.69 0.0000 150 17.00 7.24 0.0823 0.0101

200 13.97 0.00 0.00 0.0000 516.25 0.0000 200 12.21 5.20 0.0591 0.0073

250 10.61 0.00 0.00 0.0000 391.81 0.0000 250 9.27 3.94 0.0449 0.0055

500 4.18 0.00 0.00 0.0000 154.56 0.0000 500 3.66 1.56 0.0177 0.0022

1000 1.58 0.00 0.00 0.0000 58.40 0.0000 1000 1.38 0.59 0.0067 0.0008

D-119
Facility G-03 - 55% Perc, 25% MeCl

Met Set: Default -0

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0.0749

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0.0394

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.30 38.01 16.18 0.1841 2744.96 0.0226 20 74.30 2.93 1.25 0.0010 2744.96 0.0147

30 64.57 33.03 14.06 0.1600 2385.45 0.0196 30 64.57 2.54 1.08 0.0008 2385.45 0.0128

40 56.52 28.91 12.31 0.1400 2088.05 0.0172 40 56.52 2.23 0.95 0.0007 2088.05 0.0112

50 49.84 25.50 10.85 0.1235 1841.40 0.0152 50 49.84 1.96 0.84 0.0007 1841.40 0.0099

60 44.27 22.65 9.64 0.1097 1635.59 0.0135 60 44.27 1.74 0.74 0.0006 1635.59 0.0088

80 35.62 18.22 7.76 0.0882 1315.96 0.0108 80 35.62 1.40 0.60 0.0005 1315.96 0.0070

100 29.32 15.00 6.38 0.0726 1083.10 0.0089 100 29.32 1.16 0.49 0.0004 1083.10 0.0058

150 19.45 9.95 4.24 0.0482 718.69 0.0059 150 19.45 0.77 0.33 0.0003 718.69 0.0038

200 13.97 7.15 3.04 0.0346 516.25 0.0043 200 13.97 0.55 0.23 0.0002 516.25 0.0028

250 10.61 5.43 2.31 0.0263 391.81 0.0032 250 10.61 0.42 0.18 0.0001 391.81 0.0021

500 4.18 2.14 0.91 0.0104 154.56 0.0013 500 4.18 0.16 0.07 0.0001 154.56 0.0008

1000 1.58 0.81 0.34 0.0039 58.40 0.0005 1000 1.58 0.06 0.03 2.1E-05 58.40 0.0003

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 74.30 0.00 0.00 0.0000 2744.96 0.0000 20 40.94 17.43 0.1850 0.0373

30 64.57 0.00 0.00 0.0000 2385.45 0.0000 30 35.57 15.14 0.1608 0.0324

40 56.52 0.00 0.00 0.0000 2088.05 0.0000 40 31.14 13.26 0.1408 0.0284

50 49.84 0.00 0.00 0.0000 1841.40 0.0000 50 27.46 11.69 0.1241 0.0250

60 44.27 0.00 0.00 0.0000 1635.59 0.0000 60 24.39 10.38 0.1103 0.0222

80 35.62 0.00 0.00 0.0000 1315.96 0.0000 80 19.62 8.35 0.0887 0.0179

100 29.32 0.00 0.00 0.0000 1083.10 0.0000 100 16.15 6.88 0.0730 0.0147

150 19.45 0.00 0.00 0.0000 718.69 0.0000 150 10.72 4.56 0.0484 0.0098

200 13.97 0.00 0.00 0.0000 516.25 0.0000 200 7.70 3.28 0.0348 0.0070

250 10.61 0.00 0.00 0.0000 391.81 0.0000 250 5.84 2.49 0.0264 0.0053

500 4.18 0.00 0.00 0.0000 154.56 0.0000 500 2.30 0.98 0.0104 0.0021

1000 1.58 0.00 0.00 0.0000 58.40 0.0000 1000 0.87 0.37 0.0039 0.0008

D-120
Facility G-03 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Default -0

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1198 op hrs/wk: 57 Acu Rate [g/s]: 0.0898

Ann Rate [g/s]: 0.0630 Ann Rate [g/s]: 0.0473

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.30 27.62 11.76 0.1337 2744.96 0.0164 20 74.30 3.51 1.50 0.0012 2744.96 0.0176

30 64.57 24.00 10.22 0.1162 2385.45 0.0143 30 64.57 3.05 1.30 0.0010 2385.45 0.0153

40 56.52 21.01 8.94 0.1017 2088.05 0.0125 40 56.52 2.67 1.14 0.0009 2088.05 0.0134

50 49.84 18.53 7.89 0.0897 1841.40 0.0110 50 49.84 2.36 1.00 0.0008 1841.40 0.0118

60 44.27 16.46 7.01 0.0797 1635.59 0.0098 60 44.27 2.09 0.89 0.0007 1635.59 0.0105

80 35.62 13.24 5.64 0.0641 1315.96 0.0079 80 35.62 1.68 0.72 0.0006 1315.96 0.0084

100 29.32 10.90 4.64 0.0528 1083.10 0.0065 100 29.32 1.39 0.59 0.0005 1083.10 0.0069

150 19.45 7.23 3.08 0.0350 718.69 0.0043 150 19.45 0.92 0.39 0.0003 718.69 0.0046

200 13.97 5.19 2.21 0.0252 516.25 0.0031 200 13.97 0.66 0.28 0.0002 516.25 0.0033

250 10.61 3.94 1.68 0.0191 391.81 0.0023 250 10.61 0.50 0.21 0.0002 391.81 0.0025

500 4.18 1.56 0.66 0.0075 154.56 0.0009 500 4.18 0.20 0.08 0.0001 154.56 0.0010

1000 1.58 0.59 0.25 0.0028 58.40 0.0003 1000 1.58 0.07 0.03 2.5E-05 58.40 0.0004

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0599

Ann Rate [g/s]: 0.0315

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 74.30 4.68 1.99 0.0037 2744.96 0.0000 20 35.81 15.25 0.1386 0.0340

30 64.57 4.07 1.73 0.0032 2385.45 0.0000 30 31.12 13.25 0.1204 0.0296

40 56.52 3.56 1.52 0.0028 2088.05 0.0000 40 27.24 11.60 0.1054 0.0259

50 49.84 3.14 1.34 0.0025 1841.40 0.0000 50 24.02 10.23 0.0930 0.0228

60 44.27 2.79 1.19 0.0022 1635.59 0.0000 60 21.34 9.08 0.0826 0.0203

80 35.62 2.24 0.96 0.0018 1315.96 0.0000 80 17.17 7.31 0.0664 0.0163

100 29.32 1.85 0.79 0.0014 1083.10 0.0000 100 14.13 6.02 0.0547 0.0134

150 19.45 1.23 0.52 0.0010 718.69 0.0000 150 9.38 3.99 0.0363 0.0089

200 13.97 0.88 0.37 0.0007 516.25 0.0000 200 6.74 2.87 0.0261 0.0064

250 10.61 0.67 0.28 0.0005 391.81 0.0000 250 5.11 2.18 0.0198 0.0049

500 4.18 0.26 0.11 0.0002 154.56 0.0000 500 2.02 0.86 0.0078 0.0019

1000 1.58 0.10 0.04 0.0001 58.40 0.0000 1000 0.76 0.32 0.0029 0.0007

D-121
Facility G-03 - 55% Perc, 43% TCE

Met Set: Default -0

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.30 38.01 16.18 0.1841 2744.96 0.0226 20 74.30 0.00 0.00 0.0000 2744.96 0.0000

30 64.57 33.03 14.06 0.1600 2385.45 0.0196 30 64.57 0.00 0.00 0.0000 2385.45 0.0000

40 56.52 28.91 12.31 0.1400 2088.05 0.0172 40 56.52 0.00 0.00 0.0000 2088.05 0.0000

50 49.84 25.50 10.85 0.1235 1841.40 0.0152 50 49.84 0.00 0.00 0.0000 1841.40 0.0000

60 44.27 22.65 9.64 0.1097 1635.59 0.0135 60 44.27 0.00 0.00 0.0000 1635.59 0.0000

80 35.62 18.22 7.76 0.0882 1315.96 0.0108 80 35.62 0.00 0.00 0.0000 1315.96 0.0000

100 29.32 15.00 6.38 0.0726 1083.10 0.0089 100 29.32 0.00 0.00 0.0000 1083.10 0.0000

150 19.45 9.95 4.24 0.0482 718.69 0.0059 150 19.45 0.00 0.00 0.0000 718.69 0.0000

200 13.97 7.15 3.04 0.0346 516.25 0.0043 200 13.97 0.00 0.00 0.0000 516.25 0.0000

250 10.61 5.43 2.31 0.0263 391.81 0.0032 250 10.61 0.00 0.00 0.0000 391.81 0.0000

500 4.18 2.14 0.91 0.0104 154.56 0.0013 500 4.18 0.00 0.00 0.0000 154.56 0.0000

1000 1.58 0.81 0.34 0.0039 58.40 0.0005 1000 1.58 0.00 0.00 0.0000 58.40 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.1288

Ann Rate [g/s]: 0.0677

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 74.30 10.06 4.28 0.0079 2744.96 0.0000 20 48.07 20.46 0.1919 0.0226

30 64.57 8.74 3.72 0.0068 2385.45 0.0000 30 41.77 17.78 0.1668 0.0196

40 56.52 7.65 3.26 0.0060 2088.05 0.0000 40 36.56 15.56 0.1460 0.0172

50 49.84 6.75 2.87 0.0053 1841.40 0.0000 50 32.25 13.73 0.1287 0.0152

60 44.27 5.99 2.55 0.0047 1635.59 0.0000 60 28.64 12.19 0.1144 0.0135

80 35.62 4.82 2.05 0.0038 1315.96 0.0000 80 23.04 9.81 0.0920 0.0108

100 29.32 3.97 1.69 0.0031 1083.10 0.0000 100 18.97 8.07 0.0757 0.0089

150 19.45 2.63 1.12 0.0021 718.69 0.0000 150 12.59 5.36 0.0502 0.0059

200 13.97 1.89 0.81 0.0015 516.25 0.0000 200 9.04 3.85 0.0361 0.0043

250 10.61 1.44 0.61 0.0011 391.81 0.0000 250 6.86 2.92 0.0274 0.0032

500 4.18 0.57 0.24 0.0004 154.56 0.0000 500 2.71 1.15 0.0108 0.0013

1000 1.58 0.21 0.09 0.0002 58.40 0.0000 1000 1.02 0.44 0.0041 0.0005

D-122
Risk Assessment Summary - 3 Generic Facilities

Multicomponent Impacts - Brake Cleaners - Acute

Facility G-03 - 94% Perc

Met Set: Fresno

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 20.09 17.55 7.47 0.0850 1266.24 0.0178 20 20.09 0.00 0.00 0.0000 1266.24 0.0000

30 34.50 30.15 12.83 0.1460 1668.13 0.0235 30 34.50 0.00 0.00 0.0000 1668.13 0.0000

40 26.10 22.81 9.71 0.1104 1472.59 0.0207 40 26.10 0.00 0.00 0.0000 1472.59 0.0000

50 24.31 21.24 9.04 0.1029 1934.45 0.0272 50 24.31 0.00 0.00 0.0000 1934.45 0.0000

60 20.92 18.28 7.78 0.0885 1746.52 0.0246 60 20.92 0.00 0.00 0.0000 1746.52 0.0000

80 12.26 10.71 4.56 0.0519 1403.39 0.0198 80 12.26 0.00 0.00 0.0000 1403.39 0.0000

100 8.02 7.01 2.98 0.0339 1167.81 0.0164 100 8.02 0.00 0.00 0.0000 1167.81 0.0000

150 3.69 3.22 1.37 0.0156 760.67 0.0107 150 3.69 0.00 0.00 0.0000 760.67 0.0000

200 2.12 1.85 0.79 0.0090 527.81 0.0074 200 2.12 0.00 0.00 0.0000 527.81 0.0000

250 1.37 1.20 0.51 0.0058 395.54 0.0056 250 1.37 0.00 0.00 0.0000 395.54 0.0000

500 0.35 0.31 0.13 0.0015 151.49 0.0021 500 0.35 0.00 0.00 0.0000 151.49 0.0000

1000 0.09 0.08 0.03 0.0004 55.11 0.0008 1000 0.09 0.00 0.00 0.0000 55.11 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 20.09 0.00 0.00 0.0000 1266.24 0.0000 20 17.55 7.47 0.0850 0.0178

30 34.50 0.00 0.00 0.0000 1668.13 0.0000 30 30.15 12.83 0.1460 0.0235

40 26.10 0.00 0.00 0.0000 1472.59 0.0000 40 22.81 9.71 0.1104 0.0207

50 24.31 0.00 0.00 0.0000 1934.45 0.0000 50 21.24 9.04 0.1029 0.0272

60 20.92 0.00 0.00 0.0000 1746.52 0.0000 60 18.28 7.78 0.0885 0.0246

80 12.26 0.00 0.00 0.0000 1403.39 0.0000 80 10.71 4.56 0.0519 0.0198

100 8.02 0.00 0.00 0.0000 1167.81 0.0000 100 7.01 2.98 0.0339 0.0164

150 3.69 0.00 0.00 0.0000 760.67 0.0000 150 3.22 1.37 0.0156 0.0107

200 2.12 0.00 0.00 0.0000 527.81 0.0000 200 1.85 0.79 0.0090 0.0074

250 1.37 0.00 0.00 0.0000 395.54 0.0000 250 1.20 0.51 0.0058 0.0056

500 0.35 0.00 0.00 0.0000 151.49 0.0000 500 0.31 0.13 0.0015 0.0021

1000 0.09 0.00 0.00 0.0000 55.11 0.0000 1000 0.08 0.03 0.0004 0.0008

D-123
Facility G-03 - 55% Perc, 25% MeCl

Met Set: Fresno

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0.0749

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0.0394

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 20.09 10.28 4.37 0.0498 1266.24 0.0104 20 20.09 0.79 0.34 0.0003 1266.24 0.0068

30 34.50 17.65 7.51 0.0855 1668.13 0.0137 30 34.50 1.36 0.58 0.0005 1668.13 0.0089

40 26.10 13.35 5.68 0.0647 1472.59 0.0121 40 26.10 1.03 0.44 0.0003 1472.59 0.0079

50 24.31 12.44 5.29 0.0602 1934.45 0.0159 50 24.31 0.96 0.41 0.0003 1934.45 0.0103

60 20.92 10.70 4.56 0.0518 1746.52 0.0144 60 20.92 0.82 0.35 0.0003 1746.52 0.0093

80 12.26 6.27 2.67 0.0304 1403.39 0.0116 80 12.26 0.48 0.21 0.0002 1403.39 0.0075

100 8.02 4.10 1.75 0.0199 1167.81 0.0096 100 8.02 0.32 0.13 0.0001 1167.81 0.0062

150 3.69 1.89 0.80 0.0091 760.67 0.0063 150 3.69 0.15 0.06 4.8E-05 760.67 0.0041

200 2.12 1.08 0.46 0.0053 527.81 0.0043 200 2.12 0.08 0.04 2.8E-05 527.81 0.0028

250 1.37 0.70 0.30 0.0034 395.54 0.0033 250 1.37 0.05 0.02 1.8E-05 395.54 0.0021

500 0.35 0.18 0.08 0.0009 151.49 0.0012 500 0.35 0.01 0.01 4.6E-06 151.49 0.0008

1000 0.09 0.05 0.02 0.0002 55.11 0.0005 1000 0.09 0.00 0.00 1.2E-06 55.11 0.0003

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 20.09 0.00 0.00 0.0000 1266.24 0.0000 20 11.07 4.71 0.0500 0.0172

30 34.50 0.00 0.00 0.0000 1668.13 0.0000 30 19.01 8.09 0.0859 0.0227

40 26.10 0.00 0.00 0.0000 1472.59 0.0000 40 14.38 6.12 0.0650 0.0200

50 24.31 0.00 0.00 0.0000 1934.45 0.0000 50 13.39 5.70 0.0605 0.0263

60 20.92 0.00 0.00 0.0000 1746.52 0.0000 60 11.53 4.91 0.0521 0.0237

80 12.26 0.00 0.00 0.0000 1403.39 0.0000 80 6.75 2.88 0.0305 0.0191

100 8.02 0.00 0.00 0.0000 1167.81 0.0000 100 4.42 1.88 0.0200 0.0159

150 3.69 0.00 0.00 0.0000 760.67 0.0000 150 2.03 0.87 0.0092 0.0103

200 2.12 0.00 0.00 0.0000 527.81 0.0000 200 1.17 0.50 0.0053 0.0072

250 1.37 0.00 0.00 0.0000 395.54 0.0000 250 0.75 0.32 0.0034 0.0054

500 0.35 0.00 0.00 0.0000 151.49 0.0000 500 0.19 0.08 0.0009 0.0021

1000 0.09 0.00 0.00 0.0000 55.11 0.0000 1000 0.05 0.02 0.0002 0.0007

D-124
Facility G-03 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Fresno

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1198 op hrs/wk: 57 Acu Rate [g/s]: 0.0898

Ann Rate [g/s]: 0.0630 Ann Rate [g/s]: 0.0473

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 20.09 7.47 3.18 0.0362 1266.24 0.0076 20 20.09 0.95 0.40 0.0003 1266.24 0.0081

30 34.50 12.82 5.46 0.0621 1668.13 0.0100 30 34.50 1.63 0.69 0.0005 1668.13 0.0107

40 26.10 9.70 4.13 0.0470 1472.59 0.0088 40 26.10 1.23 0.53 0.0004 1472.59 0.0094

50 24.31 9.04 3.85 0.0438 1934.45 0.0116 50 24.31 1.15 0.49 0.0004 1934.45 0.0124

60 20.92 7.78 3.31 0.0377 1746.52 0.0105 60 20.92 0.99 0.42 0.0003 1746.52 0.0112

80 12.26 4.56 1.94 0.0221 1403.39 0.0084 80 12.26 0.58 0.25 0.0002 1403.39 0.0090

100 8.02 2.98 1.27 0.0144 1167.81 0.0070 100 8.02 0.38 0.16 0.0001 1167.81 0.0075

150 3.69 1.37 0.58 0.0066 760.67 0.0046 150 3.69 0.17 0.07 0.0001 760.67 0.0049

200 2.12 0.79 0.34 0.0038 527.81 0.0032 200 2.12 0.10 0.04 3.3E-05 527.81 0.0034

250 1.37 0.51 0.22 0.0025 395.54 0.0024 250 1.37 0.06 0.03 2.2E-05 395.54 0.0025

500 0.35 0.13 0.06 0.0006 151.49 0.0009 500 0.35 0.02 0.01 5.5E-06 151.49 0.0010

1000 0.09 0.03 0.01 0.0002 55.11 0.0003 1000 0.09 0.00 0.00 1.4E-06 55.11 0.0004

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0599

Ann Rate [g/s]: 0.0315

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 20.09 1.27 0.54 0.0010 1266.24 0.0000 20 9.68 4.12 0.0375 0.0157

30 34.50 2.17 0.93 0.0017 1668.13 0.0000 30 16.63 7.08 0.0643 0.0207

40 26.10 1.64 0.70 0.0013 1472.59 0.0000 40 12.58 5.36 0.0487 0.0183

50 24.31 1.53 0.65 0.0012 1934.45 0.0000 50 11.72 4.99 0.0453 0.0240

60 20.92 1.32 0.56 0.0010 1746.52 0.0000 60 10.08 4.29 0.0390 0.0217

80 12.26 0.77 0.33 0.0006 1403.39 0.0000 80 5.91 2.52 0.0229 0.0174

100 8.02 0.51 0.22 0.0004 1167.81 0.0000 100 3.87 1.65 0.0150 0.0145

150 3.69 0.23 0.10 0.0002 760.67 0.0000 150 1.78 0.76 0.0069 0.0094

200 2.12 0.13 0.06 0.0001 527.81 0.0000 200 1.02 0.43 0.0040 0.0065

250 1.37 0.09 0.04 0.0001 395.54 0.0000 250 0.66 0.28 0.0026 0.0049

500 0.35 0.02 0.01 1.7E-05 151.49 0.0000 500 0.17 0.07 0.0007 0.0019

1000 0.09 0.01 0.00 4.4E-06 55.11 0.0000 1000 0.04 0.02 0.0002 0.0007

D-125
Facility G-03 - 55% Perc, 43% TCE

Met Set: Fresno

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 20.09 10.28 4.37 0.0498 1266.24 0.0104 20 20.09 0.00 0.00 0.0000 1266.24 0.0000

30 34.50 17.65 7.51 0.0855 1668.13 0.0137 30 34.50 0.00 0.00 0.0000 1668.13 0.0000

40 26.10 13.35 5.68 0.0647 1472.59 0.0121 40 26.10 0.00 0.00 0.0000 1472.59 0.0000

50 24.31 12.44 5.29 0.0602 1934.45 0.0159 50 24.31 0.00 0.00 0.0000 1934.45 0.0000

60 20.92 10.70 4.56 0.0518 1746.52 0.0144 60 20.92 0.00 0.00 0.0000 1746.52 0.0000

80 12.26 6.27 2.67 0.0304 1403.39 0.0116 80 12.26 0.00 0.00 0.0000 1403.39 0.0000

100 8.02 4.10 1.75 0.0199 1167.81 0.0096 100 8.02 0.00 0.00 0.0000 1167.81 0.0000

150 3.69 1.89 0.80 0.0091 760.67 0.0063 150 3.69 0.00 0.00 0.0000 760.67 0.0000

200 2.12 1.08 0.46 0.0053 527.81 0.0043 200 2.12 0.00 0.00 0.0000 527.81 0.0000

250 1.37 0.70 0.30 0.0034 395.54 0.0033 250 1.37 0.00 0.00 0.0000 395.54 0.0000

500 0.35 0.18 0.08 0.0009 151.49 0.0012 500 0.35 0.00 0.00 0.0000 151.49 0.0000

1000 0.09 0.05 0.02 0.0002 55.11 0.0005 1000 0.09 0.00 0.00 0.0000 55.11 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.1288

Ann Rate [g/s]: 0.0677

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 20.09 2.72 1.16 0.0021 1266.24 0.0000 20 13.00 5.53 0.0519 0.0104

30 34.50 4.67 1.99 0.0036 1668.13 0.0000 30 22.32 9.50 0.0891 0.0137

40 26.10 3.53 1.50 0.0028 1472.59 0.0000 40 16.88 7.19 0.0674 0.0121

50 24.31 3.29 1.40 0.0026 1934.45 0.0000 50 15.73 6.69 0.0628 0.0159

60 20.92 2.83 1.21 0.0022 1746.52 0.0000 60 13.53 5.76 0.0540 0.0144

80 12.26 1.66 0.71 0.0013 1403.39 0.0000 80 7.93 3.38 0.0317 0.0116

100 8.02 1.09 0.46 0.0008 1167.81 0.0000 100 5.19 2.21 0.0207 0.0096

150 3.69 0.50 0.21 0.0004 760.67 0.0000 150 2.39 1.02 0.0095 0.0063

200 2.12 0.29 0.12 0.0002 527.81 0.0000 200 1.37 0.58 0.0055 0.0043

250 1.37 0.19 0.08 0.0001 395.54 0.0000 250 0.89 0.38 0.0035 0.0033

500 0.35 0.05 0.02 3.7E-05 151.49 0.0000 500 0.23 0.10 0.0009 0.0012

1000 0.09 0.01 0.01 9.5E-06 55.11 0.0000 1000 0.06 0.02 0.0002 0.0005

D-126
Facility G-03 - 94% Perc

Met Set: Concord

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 18.28 15.97 6.80 0.0774 1344.83 0.0189 20 18.28 0.00 0.00 0.0000 1344.83 0.0000

30 41.78 36.51 15.54 0.1768 1964.95 0.0277 30 41.78 0.00 0.00 0.0000 1964.95 0.0000

40 35.45 30.98 13.19 0.1500 1702.10 0.0240 40 35.45 0.00 0.00 0.0000 1702.10 0.0000

50 32.92 28.77 12.24 0.1393 2643.95 0.0372 50 32.92 0.00 0.00 0.0000 2643.95 0.0000

60 26.78 23.40 9.96 0.1133 2498.24 0.0352 60 26.78 0.00 0.00 0.0000 2498.24 0.0000

80 15.70 13.72 5.84 0.0664 1915.64 0.0270 80 15.70 0.00 0.00 0.0000 1915.64 0.0000

100 10.33 9.03 3.84 0.0437 1511.07 0.0213 100 10.33 0.00 0.00 0.0000 1511.07 0.0000

150 4.82 4.21 1.79 0.0204 927.46 0.0131 150 4.82 0.00 0.00 0.0000 927.46 0.0000

200 2.79 2.44 1.04 0.0118 633.44 0.0089 200 2.79 0.00 0.00 0.0000 633.44 0.0000

250 1.83 1.60 0.68 0.0077 464.37 0.0065 250 1.83 0.00 0.00 0.0000 464.37 0.0000

500 0.48 0.42 0.18 0.0020 169.00 0.0024 500 0.48 0.00 0.00 0.0000 169.00 0.0000

1000 0.14 0.12 0.05 0.0006 61.00 0.0009 1000 0.14 0.00 0.00 0.0000 61.00 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 18.28 0.00 0.00 0.0000 1344.83 0.0000 20 15.97 6.80 0.0774 0.0189

30 41.78 0.00 0.00 0.0000 1964.95 0.0000 30 36.51 15.54 0.1768 0.0277

40 35.45 0.00 0.00 0.0000 1702.10 0.0000 40 30.98 13.19 0.1500 0.0240

50 32.92 0.00 0.00 0.0000 2643.95 0.0000 50 28.77 12.24 0.1393 0.0372

60 26.78 0.00 0.00 0.0000 2498.24 0.0000 60 23.40 9.96 0.1133 0.0352

80 15.70 0.00 0.00 0.0000 1915.64 0.0000 80 13.72 5.84 0.0664 0.0270

100 10.33 0.00 0.00 0.0000 1511.07 0.0000 100 9.03 3.84 0.0437 0.0213

150 4.82 0.00 0.00 0.0000 927.46 0.0000 150 4.21 1.79 0.0204 0.0131

200 2.79 0.00 0.00 0.0000 633.44 0.0000 200 2.44 1.04 0.0118 0.0089

250 1.83 0.00 0.00 0.0000 464.37 0.0000 250 1.60 0.68 0.0077 0.0065

500 0.48 0.00 0.00 0.0000 169.00 0.0000 500 0.42 0.18 0.0020 0.0024

1000 0.14 0.00 0.00 0.0000 61.00 0.0000 1000 0.12 0.05 0.0006 0.0009

D-127
Facility G-03 - 55% Perc, 25% MeCl

Met Set: Concord

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0.0749

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0.0473

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 18.28 9.35 3.98 0.0453 1344.83 0.0111 20 18.28 0.72 0.31 0.0002 1344.83 0.0072

30 41.78 21.37 9.10 0.1035 1964.95 0.0162 30 41.78 1.65 0.70 0.0005 1964.95 0.0105

40 35.45 18.13 7.72 0.0878 1702.10 0.0140 40 35.45 1.40 0.59 0.0005 1702.10 0.0091

50 32.92 16.84 7.17 0.0815 2643.95 0.0218 50 32.92 1.30 0.55 0.0004 2643.95 0.0141

60 26.78 13.70 5.83 0.0663 2498.24 0.0206 60 26.78 1.06 0.45 0.0004 2498.24 0.0134

80 15.70 8.03 3.42 0.0389 1915.64 0.0158 80 15.70 0.62 0.26 0.0002 1915.64 0.0102

100 10.33 5.28 2.25 0.0256 1511.07 0.0124 100 10.33 0.41 0.17 0.0001 1511.07 0.0081

150 4.82 2.47 1.05 0.0119 927.46 0.0076 150 4.82 0.19 0.08 0.0001 927.46 0.0050

200 2.79 1.43 0.61 0.0069 633.44 0.0052 200 2.79 0.11 0.05 0.0000 633.44 0.0034

250 1.83 0.94 0.40 0.0045 464.37 0.0038 250 1.83 0.07 0.03 0.0000 464.37 0.0025

500 0.48 0.25 0.10 0.0012 169.00 0.0014 500 0.48 0.02 0.01 0.0000 169.00 0.0009

1000 0.14 0.07 0.03 0.0003 61.00 0.0005 1000 0.14 0.01 0.00 0.0000 61.00 0.0003

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 18.28 0.00 0.00 0.0000 1344.83 0.0000 20 10.07 4.29 0.0455 0.0183

30 41.78 0.00 0.00 0.0000 1964.95 0.0000 30 23.02 9.80 0.1040 0.0267

40 35.45 0.00 0.00 0.0000 1702.10 0.0000 40 19.53 8.31 0.0883 0.0231

50 32.92 0.00 0.00 0.0000 2643.95 0.0000 50 18.14 7.72 0.0820 0.0359

60 26.78 0.00 0.00 0.0000 2498.24 0.0000 60 14.75 6.28 0.0667 0.0339

80 15.70 0.00 0.00 0.0000 1915.64 0.0000 80 8.65 3.68 0.0391 0.0260

100 10.33 0.00 0.00 0.0000 1511.07 0.0000 100 5.69 2.42 0.0257 0.0205

150 4.82 0.00 0.00 0.0000 927.46 0.0000 150 2.66 1.13 0.0120 0.0126

200 2.79 0.00 0.00 0.0000 633.44 0.0000 200 1.54 0.65 0.0069 0.0086

250 1.83 0.00 0.00 0.0000 464.37 0.0000 250 1.01 0.43 0.0046 0.0063

500 0.48 0.00 0.00 0.0000 169.00 0.0000 500 0.26 0.11 0.0012 0.0023

1000 0.14 0.00 0.00 0.0000 61.00 0.0000 1000 0.08 0.03 0.0003 0.0008

D-128
Facility G-03 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Concord

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1198 op hrs/wk: 57 Acu Rate [g/s]: 0.0898

Ann Rate [g/s]: 0.0630 Ann Rate [g/s]: 0.0473

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 18.28 6.79 2.89 0.0329 1344.83 0.0081 20 18.28 0.86 0.37 0.0003 1344.83 0.0086

30 41.78 15.53 6.61 0.0752 1964.95 0.0118 30 41.78 1.98 0.84 0.0007 1964.95 0.0126

40 35.45 13.18 5.61 0.0638 1702.10 0.0102 40 35.45 1.68 0.71 0.0006 1702.10 0.0109

50 32.92 12.24 5.21 0.0593 2643.95 0.0158 50 32.92 1.56 0.66 0.0005 2643.95 0.0170

60 26.78 9.95 4.24 0.0482 2498.24 0.0150 60 26.78 1.27 0.54 0.0004 2498.24 0.0160

80 15.70 5.84 2.48 0.0283 1915.64 0.0115 80 15.70 0.74 0.32 0.0002 1915.64 0.0123

100 10.33 3.84 1.63 0.0186 1511.07 0.0091 100 10.33 0.49 0.21 0.0002 1511.07 0.0097

150 4.82 1.79 0.76 0.0087 927.46 0.0056 150 4.82 0.23 0.10 0.0001 927.46 0.0059

200 2.79 1.04 0.44 0.0050 633.44 0.0038 200 2.79 0.13 0.06 4.4E-05 633.44 0.0041

250 1.83 0.68 0.29 0.0033 464.37 0.0028 250 1.83 0.09 0.04 2.9E-05 464.37 0.0030

500 0.48 0.18 0.08 0.0009 169.00 0.0010 500 0.48 0.02 0.01 7.6E-06 169.00 0.0011

1000 0.14 0.05 0.02 0.0003 61.00 0.0004 1000 0.14 0.01 0.00 2.2E-06 61.00 0.0004

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0599

Ann Rate [g/s]: 0.0315

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 18.28 1.15 0.49 0.0009 1344.83 0.0000 20 8.81 3.75 0.0341 0.0167

30 41.78 2.63 1.12 0.0021 1964.95 0.0000 30 20.14 8.57 0.0779 0.0244

40 35.45 2.23 0.95 0.0017 1702.10 0.0000 40 17.09 7.27 0.0661 0.0211

50 32.92 2.07 0.88 0.0016 2643.95 0.0000 50 15.87 6.75 0.0614 0.0328

60 26.78 1.69 0.72 0.0013 2498.24 0.0000 60 12.91 5.49 0.0499 0.0310

80 15.70 0.99 0.42 0.0008 1915.64 0.0000 80 7.57 3.22 0.0293 0.0238

100 10.33 0.65 0.28 0.0005 1511.07 0.0000 100 4.98 2.12 0.0193 0.0187

150 4.82 0.30 0.13 0.0002 927.46 0.0000 150 2.32 0.99 0.0090 0.0115

200 2.79 0.18 0.07 0.0001 633.44 0.0000 200 1.34 0.57 0.0052 0.0079

250 1.83 0.12 0.05 0.0001 464.37 0.0000 250 0.88 0.38 0.0034 0.0058

500 0.48 0.03 0.01 2.4E-05 169.00 0.0000 500 0.23 0.10 0.0009 0.0021

1000 0.14 0.01 0.00 6.9E-06 61.00 0.0000 1000 0.07 0.03 0.0003 0.0008

D-129
Facility G-03 - 55% Perc, 43% TCE

Met Set: Concord

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 18.28 9.35 3.98 0.0453 1344.83 0.0111 20 18.28 0.00 0.00 0.0000 1344.83 0.0000

30 41.78 21.37 9.10 0.1035 1964.95 0.0162 30 41.78 0.00 0.00 0.0000 1964.95 0.0000

40 35.45 18.13 7.72 0.0878 1702.10 0.0140 40 35.45 0.00 0.00 0.0000 1702.10 0.0000

50 32.92 16.84 7.17 0.0815 2643.95 0.0218 50 32.92 0.00 0.00 0.0000 2643.95 0.0000

60 26.78 13.70 5.83 0.0663 2498.24 0.0206 60 26.78 0.00 0.00 0.0000 2498.24 0.0000

80 15.70 8.03 3.42 0.0389 1915.64 0.0158 80 15.70 0.00 0.00 0.0000 1915.64 0.0000

100 10.33 5.28 2.25 0.0256 1511.07 0.0124 100 10.33 0.00 0.00 0.0000 1511.07 0.0000

150 4.82 2.47 1.05 0.0119 927.46 0.0076 150 4.82 0.00 0.00 0.0000 927.46 0.0000

200 2.79 1.43 0.61 0.0069 633.44 0.0052 200 2.79 0.00 0.00 0.0000 633.44 0.0000

250 1.83 0.94 0.40 0.0045 464.37 0.0038 250 1.83 0.00 0.00 0.0000 464.37 0.0000

500 0.48 0.25 0.10 0.0012 169.00 0.0014 500 0.48 0.00 0.00 0.0000 169.00 0.0000

1000 0.14 0.07 0.03 0.0003 61.00 0.0005 1000 0.14 0.00 0.00 0.0000 61.00 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.1288

Ann Rate [g/s]: 0.0677

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 18.28 2.48 1.05 0.0019 1344.83 0.0000 20 11.83 5.03 0.0472 0.0111

30 41.78 5.66 2.41 0.0044 1964.95 0.0000 30 27.03 11.51 0.1079 0.0162

40 35.45 4.80 2.04 0.0037 1702.10 0.0000 40 22.93 9.76 0.0916 0.0140

50 32.92 4.46 1.90 0.0035 2643.95 0.0000 50 21.30 9.07 0.0850 0.0218

60 26.78 3.63 1.54 0.0028 2498.24 0.0000 60 17.32 7.37 0.0692 0.0206

80 15.70 2.13 0.90 0.0017 1915.64 0.0000 80 10.16 4.32 0.0406 0.0158

100 10.33 1.40 0.60 0.0011 1511.07 0.0000 100 6.68 2.84 0.0267 0.0124

150 4.82 0.65 0.28 0.0005 927.46 0.0000 150 3.12 1.33 0.0124 0.0076

200 2.79 0.38 0.16 0.0003 633.44 0.0000 200 1.80 0.77 0.0072 0.0052

250 1.83 0.25 0.11 0.0002 464.37 0.0000 250 1.18 0.50 0.0047 0.0038

500 0.48 0.06 0.03 0.0001 169.00 0.0000 500 0.31 0.13 0.0012 0.0014

1000 0.14 0.02 0.01 1.5E-05 61.00 0.0000 1000 0.09 0.04 0.0004 0.0005

D-130
Facility G-03 - 94% Perc

Met Set: Mather

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 11.46 10.01 4.26 0.0485 958.09 0.0135 20 11.46 0.00 0.00 0.0000 958.09 0.0000

30 25.06 21.90 9.32 0.1060 1290.22 0.0182 30 25.06 0.00 0.00 0.0000 1290.22 0.0000

40 20.77 18.15 7.73 0.0879 1240.56 0.0175 40 20.77 0.00 0.00 0.0000 1240.56 0.0000

50 19.28 16.85 7.17 0.0816 1734.69 0.0244 50 19.28 0.00 0.00 0.0000 1734.69 0.0000

60 15.76 13.77 5.86 0.0667 1546.97 0.0218 60 15.76 0.00 0.00 0.0000 1546.97 0.0000

80 9.15 8.00 3.40 0.0387 1057.88 0.0149 80 9.15 0.00 0.00 0.0000 1057.88 0.0000

100 5.97 5.22 2.22 0.0253 790.98 0.0111 100 5.97 0.00 0.00 0.0000 790.98 0.0000

150 2.74 2.39 1.02 0.0116 526.98 0.0074 150 2.74 0.00 0.00 0.0000 526.98 0.0000

200 1.57 1.37 0.58 0.0066 374.12 0.0053 200 1.57 0.00 0.00 0.0000 374.12 0.0000

250 1.02 0.89 0.38 0.0043 280.03 0.0039 250 1.02 0.00 0.00 0.0000 280.03 0.0000

500 0.26 0.23 0.10 0.0011 105.06 0.0015 500 0.26 0.00 0.00 0.0000 105.06 0.0000

1000 0.07 0.06 0.03 0.0003 38.59 0.0005 1000 0.07 0.00 0.00 0.0000 38.59 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 11.46 0.00 0.00 0.0000 958.09 0.0000 20 10.01 4.26 0.0485 0.0135

30 25.06 0.00 0.00 0.0000 1290.22 0.0000 30 21.90 9.32 0.1060 0.0182

40 20.77 0.00 0.00 0.0000 1240.56 0.0000 40 18.15 7.73 0.0879 0.0175

50 19.28 0.00 0.00 0.0000 1734.69 0.0000 50 16.85 7.17 0.0816 0.0244

60 15.76 0.00 0.00 0.0000 1546.97 0.0000 60 13.77 5.86 0.0667 0.0218

80 9.15 0.00 0.00 0.0000 1057.88 0.0000 80 8.00 3.40 0.0387 0.0149

100 5.97 0.00 0.00 0.0000 790.98 0.0000 100 5.22 2.22 0.0253 0.0111

150 2.74 0.00 0.00 0.0000 526.98 0.0000 150 2.39 1.02 0.0116 0.0074

200 1.57 0.00 0.00 0.0000 374.12 0.0000 200 1.37 0.58 0.0066 0.0053

250 1.02 0.00 0.00 0.0000 280.03 0.0000 250 0.89 0.38 0.0043 0.0039

500 0.26 0.00 0.00 0.0000 105.06 0.0000 500 0.23 0.10 0.0011 0.0015

1000 0.07 0.00 0.00 0.0000 38.59 0.0000 1000 0.06 0.03 0.0003 0.0005

D-131
Facility G-03 - 55% Perc, 25% MeCl

Met Set: Mather

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0.0749

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0.0394

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 11.46 5.86 2.50 0.0284 958.09 0.0079 20 11.46 0.45 0.19 0.0002 958.09 0.0051

30 25.06 12.82 5.46 0.0621 1290.22 0.0106 30 25.06 0.99 0.42 0.0003 1290.22 0.0069

40 20.77 10.62 4.52 0.0515 1240.56 0.0102 40 20.77 0.82 0.35 0.0003 1240.56 0.0066

50 19.28 9.86 4.20 0.0478 1734.69 0.0143 50 19.28 0.76 0.32 0.0003 1734.69 0.0093

60 15.76 8.06 3.43 0.0390 1546.97 0.0127 60 15.76 0.62 0.26 0.0002 1546.97 0.0083

80 9.15 4.68 1.99 0.0227 1057.88 0.0087 80 9.15 0.36 0.15 0.0001 1057.88 0.0057

100 5.97 3.05 1.30 0.0148 790.98 0.0065 100 5.97 0.24 0.10 0.0001 790.98 0.0042

150 2.74 1.40 0.60 0.0068 526.98 0.0043 150 2.74 0.11 0.05 3.6E-05 526.98 0.0028

200 1.57 0.80 0.34 0.0039 374.12 0.0031 200 1.57 0.06 0.03 2.1E-05 374.12 0.0020

250 1.02 0.52 0.22 0.0025 280.03 0.0023 250 1.02 0.04 0.02 1.3E-05 280.03 0.0015

500 0.26 0.13 0.06 0.0006 105.06 0.0009 500 0.26 0.01 0.00 3.4E-06 105.06 0.0006

1000 0.07 0.04 0.02 0.0002 38.59 0.0003 1000 0.07 0.00 0.00 9.2E-07 38.59 0.0002

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 11.46 0.00 0.00 0.0000 958.09 0.0000 20 6.31 2.69 0.0285 0.0130

30 25.06 0.00 0.00 0.0000 1290.22 0.0000 30 13.81 5.88 0.0624 0.0175

40 20.77 0.00 0.00 0.0000 1240.56 0.0000 40 11.44 4.87 0.0517 0.0169

50 19.28 0.00 0.00 0.0000 1734.69 0.0000 50 10.62 4.52 0.0480 0.0236

60 15.76 0.00 0.00 0.0000 1546.97 0.0000 60 8.68 3.70 0.0392 0.0210

80 9.15 0.00 0.00 0.0000 1057.88 0.0000 80 5.04 2.15 0.0228 0.0144

100 5.97 0.00 0.00 0.0000 790.98 0.0000 100 3.29 1.40 0.0149 0.0107

150 2.74 0.00 0.00 0.0000 526.98 0.0000 150 1.51 0.64 0.0068 0.0072

200 1.57 0.00 0.00 0.0000 374.12 0.0000 200 0.86 0.37 0.0039 0.0051

250 1.02 0.00 0.00 0.0000 280.03 0.0000 250 0.56 0.24 0.0025 0.0038

500 0.26 0.00 0.00 0.0000 105.06 0.0000 500 0.14 0.06 0.0006 0.0014

1000 0.07 0.00 0.00 0.0000 38.59 0.0000 1000 0.04 0.02 0.0002 0.0005

D-132
Facility G-03 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Mather

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1198 op hrs/wk: 57 Acu Rate [g/s]: 0.0898

Ann Rate [g/s]: 0.0630 Ann Rate [g/s]: 0.0473

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 11.46 4.26 1.81 0.0206 958.09 0.0057 20 11.46 0.54 0.23 0.0002 958.09 0.0061

30 25.06 9.31 3.97 0.0451 1290.22 0.0077 30 25.06 1.19 0.50 0.0004 1290.22 0.0083

40 20.77 7.72 3.29 0.0374 1240.56 0.0074 40 20.77 0.98 0.42 0.0003 1240.56 0.0080

50 19.28 7.17 3.05 0.0347 1734.69 0.0104 50 19.28 0.91 0.39 0.0003 1734.69 0.0111

60 15.76 5.86 2.49 0.0284 1546.97 0.0093 60 15.76 0.75 0.32 0.0002 1546.97 0.0099

80 9.15 3.40 1.45 0.0165 1057.88 0.0063 80 9.15 0.43 0.18 0.0001 1057.88 0.0068

100 5.97 2.22 0.94 0.0107 790.98 0.0047 100 5.97 0.28 0.12 0.0001 790.98 0.0051

150 2.74 1.02 0.43 0.0049 526.98 0.0032 150 2.74 0.13 0.06 4.3E-05 526.98 0.0034

200 1.57 0.58 0.25 0.0028 374.12 0.0022 200 1.57 0.07 0.03 2.5E-05 374.12 0.0024

250 1.02 0.38 0.16 0.0018 280.03 0.0017 250 1.02 0.05 0.02 1.6E-05 280.03 0.0018

500 0.26 0.10 0.04 0.0005 105.06 0.0006 500 0.26 0.01 0.01 4.1E-06 105.06 0.0007

1000 0.07 0.03 0.01 0.0001 38.59 0.0002 1000 0.07 0.00 0.00 1.1E-06 38.59 0.0002

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0599

Ann Rate [g/s]: 0.0315

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 11.46 0.72 0.31 0.0006 958.09 0.0000 20 5.52 2.35 0.0214 0.0119

30 25.06 1.58 0.67 0.0012 1290.22 0.0000 30 12.08 5.14 0.0467 0.0160

40 20.77 1.31 0.56 0.0010 1240.56 0.0000 40 10.01 4.26 0.0387 0.0154

50 19.28 1.21 0.52 0.0009 1734.69 0.0000 50 9.29 3.96 0.0360 0.0215

60 15.76 0.99 0.42 0.0008 1546.97 0.0000 60 7.60 3.23 0.0294 0.0192

80 9.15 0.58 0.25 0.0005 1057.88 0.0000 80 4.41 1.88 0.0171 0.0131

100 5.97 0.38 0.16 0.0003 790.98 0.0000 100 2.88 1.22 0.0111 0.0098

150 2.74 0.17 0.07 0.0001 526.98 0.0000 150 1.32 0.56 0.0051 0.0065

200 1.57 0.10 0.04 0.0001 374.12 0.0000 200 0.76 0.32 0.0029 0.0046

250 1.02 0.06 0.03 0.0001 280.03 0.0000 250 0.49 0.21 0.0019 0.0035

500 0.26 0.02 0.01 1.3E-05 105.06 0.0000 500 0.13 0.05 0.0005 0.0013

1000 0.07 0.00 0.00 3.4E-06 38.59 0.0000 1000 0.03 0.01 0.0001 0.0005

D-133
Facility G-03 - 55% Perc, 43% TCE

Met Set: Mather

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 11.46 5.86 2.50 0.0284 958.09 0.0079 20 11.46 0.00 0.00 0.0000 958.09 0.0000

30 25.06 12.82 5.46 0.0621 1290.22 0.0106 30 25.06 0.00 0.00 0.0000 1290.22 0.0000

40 20.77 10.62 4.52 0.0515 1240.56 0.0102 40 20.77 0.00 0.00 0.0000 1240.56 0.0000

50 19.28 9.86 4.20 0.0478 1734.69 0.0143 50 19.28 0.00 0.00 0.0000 1734.69 0.0000

60 15.76 8.06 3.43 0.0390 1546.97 0.0127 60 15.76 0.00 0.00 0.0000 1546.97 0.0000

80 9.15 4.68 1.99 0.0227 1057.88 0.0087 80 9.15 0.00 0.00 0.0000 1057.88 0.0000

100 5.97 3.05 1.30 0.0148 790.98 0.0065 100 5.97 0.00 0.00 0.0000 790.98 0.0000

150 2.74 1.40 0.60 0.0068 526.98 0.0043 150 2.74 0.00 0.00 0.0000 526.98 0.0000

200 1.57 0.80 0.34 0.0039 374.12 0.0031 200 1.57 0.00 0.00 0.0000 374.12 0.0000

250 1.02 0.52 0.22 0.0025 280.03 0.0023 250 1.02 0.00 0.00 0.0000 280.03 0.0000

500 0.26 0.13 0.06 0.0006 105.06 0.0009 500 0.26 0.00 0.00 0.0000 105.06 0.0000

1000 0.07 0.04 0.02 0.0002 38.59 0.0003 1000 0.07 0.00 0.00 0.0000 38.59 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.1288

Ann Rate [g/s]: 0.0677

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 11.46 1.55 0.66 0.0012 958.09 0.0000 20 7.41 3.16 0.0296 0.0079

30 25.06 3.39 1.44 0.0027 1290.22 0.0000 30 16.21 6.90 0.0647 0.0106

40 20.77 2.81 1.20 0.0022 1240.56 0.0000 40 13.44 5.72 0.0536 0.0102

50 19.28 2.61 1.11 0.0020 1734.69 0.0000 50 12.47 5.31 0.0498 0.0143

60 15.76 2.13 0.91 0.0017 1546.97 0.0000 60 10.20 4.34 0.0407 0.0127

80 9.15 1.24 0.53 0.0010 1057.88 0.0000 80 5.92 2.52 0.0236 0.0087

100 5.97 0.81 0.34 0.0006 790.98 0.0000 100 3.86 1.64 0.0154 0.0065

150 2.74 0.37 0.16 0.0003 526.98 0.0000 150 1.77 0.75 0.0071 0.0043

200 1.57 0.21 0.09 0.0002 374.12 0.0000 200 1.02 0.43 0.0041 0.0031

250 1.02 0.14 0.06 0.0001 280.03 0.0000 250 0.66 0.28 0.0026 0.0023

500 0.26 0.04 0.01 2.8E-05 105.06 0.0000 500 0.17 0.07 0.0007 0.0009

1000 0.07 0.01 0.00 7.4E-06 38.59 0.0000 1000 0.05 0.02 0.0002 0.0003

D-134
Facility G-03 - 94% Perc

Met Set: Default -0

94% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.2815 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.1481 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.30 64.92 27.64 0.3144 2744.96 0.0386 20 74.30 0.00 0.00 0.0000 2744.96 0.0000

30 64.57 56.42 24.02 0.2732 2385.45 0.0336 30 64.57 0.00 0.00 0.0000 2385.45 0.0000

40 56.52 49.39 21.02 0.2392 2088.05 0.0294 40 56.52 0.00 0.00 0.0000 2088.05 0.0000

50 49.84 43.55 18.54 0.2109 1841.40 0.0259 50 49.84 0.00 0.00 0.0000 1841.40 0.0000

60 44.27 38.69 16.47 0.1873 1635.59 0.0230 60 44.27 0.00 0.00 0.0000 1635.59 0.0000

80 35.62 31.13 13.25 0.1507 1315.96 0.0185 80 35.62 0.00 0.00 0.0000 1315.96 0.0000

100 29.32 25.62 10.90 0.1241 1083.10 0.0152 100 29.32 0.00 0.00 0.0000 1083.10 0.0000

150 19.45 17.00 7.24 0.0823 718.69 0.0101 150 19.45 0.00 0.00 0.0000 718.69 0.0000

200 13.97 12.21 5.20 0.0591 516.25 0.0073 200 13.97 0.00 0.00 0.0000 516.25 0.0000

250 10.61 9.27 3.94 0.0449 391.81 0.0055 250 10.61 0.00 0.00 0.0000 391.81 0.0000

500 4.18 3.66 1.56 0.0177 154.56 0.0022 500 4.18 0.00 0.00 0.0000 154.56 0.0000

1000 1.58 1.38 0.59 0.0067 58.40 0.0008 1000 1.58 0.00 0.00 0.0000 58.40 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 74.30 0.00 0.00 0.0000 2744.96 0.0000 20 64.92 27.64 0.3144 0.0386

30 64.57 0.00 0.00 0.0000 2385.45 0.0000 30 56.42 24.02 0.2732 0.0336

40 56.52 0.00 0.00 0.0000 2088.05 0.0000 40 49.39 21.02 0.2392 0.0294

50 49.84 0.00 0.00 0.0000 1841.40 0.0000 50 43.55 18.54 0.2109 0.0259

60 44.27 0.00 0.00 0.0000 1635.59 0.0000 60 38.69 16.47 0.1873 0.0230

80 35.62 0.00 0.00 0.0000 1315.96 0.0000 80 31.13 13.25 0.1507 0.0185

100 29.32 0.00 0.00 0.0000 1083.10 0.0000 100 25.62 10.90 0.1241 0.0152

150 19.45 0.00 0.00 0.0000 718.69 0.0000 150 17.00 7.24 0.0823 0.0101

200 13.97 0.00 0.00 0.0000 516.25 0.0000 200 12.21 5.20 0.0591 0.0073

250 10.61 0.00 0.00 0.0000 391.81 0.0000 250 9.27 3.94 0.0449 0.0055

500 4.18 0.00 0.00 0.0000 154.56 0.0000 500 3.66 1.56 0.0177 0.0022

1000 1.58 0.00 0.00 0.0000 58.40 0.0000 1000 1.38 0.59 0.0067 0.0008

D-135
Facility G-03 - 55% Perc, 25% MeCl

Met Set: Default -0

55% Perc 25% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0.0749

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0.0394

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.30 38.01 16.18 0.1841 2744.96 0.0226 20 74.30 2.93 1.25 0.0010 2744.96 0.0147

30 64.57 33.03 14.06 0.1600 2385.45 0.0196 30 64.57 2.54 1.08 0.0008 2385.45 0.0128

40 56.52 28.91 12.31 0.1400 2088.05 0.0172 40 56.52 2.23 0.95 0.0007 2088.05 0.0112

50 49.84 25.50 10.85 0.1235 1841.40 0.0152 50 49.84 1.96 0.84 0.0007 1841.40 0.0099

60 44.27 22.65 9.64 0.1097 1635.59 0.0135 60 44.27 1.74 0.74 0.0006 1635.59 0.0088

80 35.62 18.22 7.76 0.0882 1315.96 0.0108 80 35.62 1.40 0.60 0.0005 1315.96 0.0070

100 29.32 15.00 6.38 0.0726 1083.10 0.0089 100 29.32 1.16 0.49 0.0004 1083.10 0.0058

150 19.45 9.95 4.24 0.0482 718.69 0.0059 150 19.45 0.77 0.33 0.0003 718.69 0.0038

200 13.97 7.15 3.04 0.0346 516.25 0.0043 200 13.97 0.55 0.23 0.0002 516.25 0.0028

250 10.61 5.43 2.31 0.0263 391.81 0.0032 250 10.61 0.42 0.18 0.0001 391.81 0.0021

500 4.18 2.14 0.91 0.0104 154.56 0.0013 500 4.18 0.16 0.07 0.0001 154.56 0.0008

1000 1.58 0.81 0.34 0.0039 58.40 0.0005 1000 1.58 0.06 0.03 2.1E-05 58.40 0.0003

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 74.30 0.00 0.00 0.0000 2744.96 0.0000 20 40.94 17.43 0.1850 0.0373

30 64.57 0.00 0.00 0.0000 2385.45 0.0000 30 35.57 15.14 0.1608 0.0324

40 56.52 0.00 0.00 0.0000 2088.05 0.0000 40 31.14 13.26 0.1408 0.0284

50 49.84 0.00 0.00 0.0000 1841.40 0.0000 50 27.46 11.69 0.1241 0.0250

60 44.27 0.00 0.00 0.0000 1635.59 0.0000 60 24.39 10.38 0.1103 0.0222

80 35.62 0.00 0.00 0.0000 1315.96 0.0000 80 19.62 8.35 0.0887 0.0179

100 29.32 0.00 0.00 0.0000 1083.10 0.0000 100 16.15 6.88 0.0730 0.0147

150 19.45 0.00 0.00 0.0000 718.69 0.0000 150 10.72 4.56 0.0484 0.0098

200 13.97 0.00 0.00 0.0000 516.25 0.0000 200 7.70 3.28 0.0348 0.0070

250 10.61 0.00 0.00 0.0000 391.81 0.0000 250 5.84 2.49 0.0264 0.0053

500 4.18 0.00 0.00 0.0000 154.56 0.0000 500 2.30 0.98 0.0104 0.0021

1000 1.58 0.00 0.00 0.0000 58.40 0.0000 1000 0.87 0.37 0.0039 0.0008

D-136
Facility G-03 - 40% Perc, 30% MeCl, 20% TCE

Met Set: Default -0

40% Perc 30% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1198 op hrs/wk: 57 Acu Rate [g/s]: 0.0898

Ann Rate [g/s]: 0.0630 Ann Rate [g/s]: 0.0473

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.30 27.62 11.76 0.1337 2744.96 0.0164 20 74.30 3.51 1.50 0.0012 2744.96 0.0176

30 64.57 24.00 10.22 0.1162 2385.45 0.0143 30 64.57 3.05 1.30 0.0010 2385.45 0.0153

40 56.52 21.01 8.94 0.1017 2088.05 0.0125 40 56.52 2.67 1.14 0.0009 2088.05 0.0134

50 49.84 18.53 7.89 0.0897 1841.40 0.0110 50 49.84 2.36 1.00 0.0008 1841.40 0.0118

60 44.27 16.46 7.01 0.0797 1635.59 0.0098 60 44.27 2.09 0.89 0.0007 1635.59 0.0105

80 35.62 13.24 5.64 0.0641 1315.96 0.0079 80 35.62 1.68 0.72 0.0006 1315.96 0.0084

100 29.32 10.90 4.64 0.0528 1083.10 0.0065 100 29.32 1.39 0.59 0.0005 1083.10 0.0069

150 19.45 7.23 3.08 0.0350 718.69 0.0043 150 19.45 0.92 0.39 0.0003 718.69 0.0046

200 13.97 5.19 2.21 0.0252 516.25 0.0031 200 13.97 0.66 0.28 0.0002 516.25 0.0033

250 10.61 3.94 1.68 0.0191 391.81 0.0023 250 10.61 0.50 0.21 0.0002 391.81 0.0025

500 4.18 1.56 0.66 0.0075 154.56 0.0009 500 4.18 0.20 0.08 0.0001 154.56 0.0010

1000 1.58 0.59 0.25 0.0028 58.40 0.0003 1000 1.58 0.07 0.03 2.5E-05 58.40 0.0004

20% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0599

Ann Rate [g/s]: 0.0315

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 74.30 4.68 1.99 0.0037 2744.96 0.0000 20 35.81 15.25 0.1386 0.0340

30 64.57 4.07 1.73 0.0032 2385.45 0.0000 30 31.12 13.25 0.1204 0.0296

40 56.52 3.56 1.52 0.0028 2088.05 0.0000 40 27.24 11.60 0.1054 0.0259

50 49.84 3.14 1.34 0.0025 1841.40 0.0000 50 24.02 10.23 0.0930 0.0228

60 44.27 2.79 1.19 0.0022 1635.59 0.0000 60 21.34 9.08 0.0826 0.0203

80 35.62 2.24 0.96 0.0018 1315.96 0.0000 80 17.17 7.31 0.0664 0.0163

100 29.32 1.85 0.79 0.0014 1083.10 0.0000 100 14.13 6.02 0.0547 0.0134

150 19.45 1.23 0.52 0.0010 718.69 0.0000 150 9.38 3.99 0.0363 0.0089

200 13.97 0.88 0.37 0.0007 516.25 0.0000 200 6.74 2.87 0.0261 0.0064

250 10.61 0.67 0.28 0.0005 391.81 0.0000 250 5.11 2.18 0.0198 0.0049

500 4.18 0.26 0.11 0.0002 154.56 0.0000 500 2.02 0.86 0.0078 0.0019

1000 1.58 0.10 0.04 0.0001 58.40 0.0000 1000 0.76 0.32 0.0029 0.0007

D-137
Facility G-03 - 55% Perc, 43% TCE

Met Set: Default -0

55% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.1647 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0867 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.30 38.01 16.18 0.1841 2744.96 0.0226 20 74.30 0.00 0.00 0.0000 2744.96 0.0000

30 64.57 33.03 14.06 0.1600 2385.45 0.0196 30 64.57 0.00 0.00 0.0000 2385.45 0.0000

40 56.52 28.91 12.31 0.1400 2088.05 0.0172 40 56.52 0.00 0.00 0.0000 2088.05 0.0000

50 49.84 25.50 10.85 0.1235 1841.40 0.0152 50 49.84 0.00 0.00 0.0000 1841.40 0.0000

60 44.27 22.65 9.64 0.1097 1635.59 0.0135 60 44.27 0.00 0.00 0.0000 1635.59 0.0000

80 35.62 18.22 7.76 0.0882 1315.96 0.0108 80 35.62 0.00 0.00 0.0000 1315.96 0.0000

100 29.32 15.00 6.38 0.0726 1083.10 0.0089 100 29.32 0.00 0.00 0.0000 1083.10 0.0000

150 19.45 9.95 4.24 0.0482 718.69 0.0059 150 19.45 0.00 0.00 0.0000 718.69 0.0000

200 13.97 7.15 3.04 0.0346 516.25 0.0043 200 13.97 0.00 0.00 0.0000 516.25 0.0000

250 10.61 5.43 2.31 0.0263 391.81 0.0032 250 10.61 0.00 0.00 0.0000 391.81 0.0000

500 4.18 2.14 0.91 0.0104 154.56 0.0013 500 4.18 0.00 0.00 0.0000 154.56 0.0000

1000 1.58 0.81 0.34 0.0039 58.40 0.0005 1000 1.58 0.00 0.00 0.0000 58.40 0.0000

43% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.1288

Ann Rate [g/s]: 0.0677

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 74.30 10.06 4.28 0.0079 2744.96 0.0000 20 48.07 20.46 0.1919 0.0226

30 64.57 8.74 3.72 0.0068 2385.45 0.0000 30 41.77 17.78 0.1668 0.0196

40 56.52 7.65 3.26 0.0060 2088.05 0.0000 40 36.56 15.56 0.1460 0.0172

50 49.84 6.75 2.87 0.0053 1841.40 0.0000 50 32.25 13.73 0.1287 0.0152

60 44.27 5.99 2.55 0.0047 1635.59 0.0000 60 28.64 12.19 0.1144 0.0135

80 35.62 4.82 2.05 0.0038 1315.96 0.0000 80 23.04 9.81 0.0920 0.0108

100 29.32 3.97 1.69 0.0031 1083.10 0.0000 100 18.97 8.07 0.0757 0.0089

150 19.45 2.63 1.12 0.0021 718.69 0.0000 150 12.59 5.36 0.0502 0.0059

200 13.97 1.89 0.81 0.0015 516.25 0.0000 200 9.04 3.85 0.0361 0.0043

250 10.61 1.44 0.61 0.0011 391.81 0.0000 250 6.86 2.92 0.0274 0.0032

500 4.18 0.57 0.24 0.0004 154.56 0.0000 500 2.71 1.15 0.0108 0.0013

1000 1.58 0.21 0.09 0.0002 58.40 0.0000 1000 1.02 0.44 0.0041 0.0005

D-138
Risk Assessment Summary - 3 Generic Facilities

Multicomponent Impacts - Carburetor Cleaners - Average of 10 Met Sets

Facility G-01 - 68% Perc

Met Set: Averaged

68% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0347 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0041 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 127.54 3.09 1.31 0.0149 10938.41 0.0190 20 127.54 0.00 0.00 0.0000 10938.41 0.0000

30 67.72 1.64 0.70 0.0079 8158.81 0.0142 30 67.72 0.00 0.00 0.0000 8158.81 0.0000

40 41.93 1.01 0.43 0.0049 6322.28 0.0110 40 41.93 0.00 0.00 0.0000 6322.28 0.0000

50 28.51 0.69 0.29 0.0033 5024.56 0.0087 50 28.51 0.00 0.00 0.0000 5024.56 0.0000

60 20.66 0.50 0.21 0.0024 4082.78 0.0071 60 20.66 0.00 0.00 0.0000 4082.78 0.0000

80 12.27 0.30 0.13 0.0014 2846.71 0.0049 80 12.27 0.00 0.00 0.0000 2846.71 0.0000

100 8.12 0.20 0.08 0.0010 2100.30 0.0036 100 8.12 0.00 0.00 0.0000 2100.30 0.0000

150 3.78 0.09 0.04 0.0004 1171.11 0.0020 150 3.78 0.00 0.00 0.0000 1171.11 0.0000

200 2.18 0.05 0.02 0.0003 763.65 0.0013 200 2.18 0.00 0.00 0.0000 763.65 0.0000

250 1.42 0.03 0.01 0.0002 545.14 0.0009 250 1.42 0.00 0.00 0.0000 545.14 0.0000

500 0.37 0.01 0.00 4.3E-05 192.37 0.0003 500 0.37 0.00 0.00 0.0000 192.37 0.0000

1000 0.10 0.00 0.00 1.1E-05 72.27 0.0001 1000 0.10 0.00 0.00 0.0000 72.27 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 127.54 0.00 0.00 0.0000 10938.41 0.0000 20 3.09 1.31 0.0149 0.0190

30 67.72 0.00 0.00 0.0000 8158.81 0.0000 30 1.64 0.70 0.0079 0.0142

40 41.93 0.00 0.00 0.0000 6322.28 0.0000 40 1.01 0.43 0.0049 0.0110

50 28.51 0.00 0.00 0.0000 5024.56 0.0000 50 0.69 0.29 0.0033 0.0087

60 20.66 0.00 0.00 0.0000 4082.78 0.0000 60 0.50 0.21 0.0024 0.0071

80 12.27 0.00 0.00 0.0000 2846.71 0.0000 80 0.30 0.13 0.0014 0.0049

100 8.12 0.00 0.00 0.0000 2100.30 0.0000 100 0.20 0.08 0.0010 0.0036

150 3.78 0.00 0.00 0.0000 1171.11 0.0000 150 0.09 0.04 0.0004 0.0020

200 2.18 0.00 0.00 0.0000 763.65 0.0000 200 0.05 0.02 0.0003 0.0013

250 1.42 0.00 0.00 0.0000 545.14 0.0000 250 0.03 0.01 0.0002 0.0009

500 0.37 0.00 0.00 0.0000 192.37 0.0000 500 0.01 0.00 4.3E-05 0.0003

1000 0.10 0.00 0.00 0.0000 72.27 0.0000 1000 0.00 0.00 1.1E-05 0.0001

D-139
Facility G-01 - 57% MeCl

Met Set: Averaged

0% Perc 57% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0.0314

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0.0037

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 127.54 0.00 0.00 0.0000 10938.41 0.0000 20 127.54 0.47 0.20 0.0002 10938.41 0.0245

30 67.72 0.00 0.00 0.0000 8158.81 0.0000 30 67.72 0.25 0.11 0.0001 8158.81 0.0183

40 41.93 0.00 0.00 0.0000 6322.28 0.0000 40 41.93 0.16 0.07 0.0001 6322.28 0.0142

50 28.51 0.00 0.00 0.0000 5024.56 0.0000 50 28.51 0.11 0.04 3.5E-05 5024.56 0.0113

60 20.66 0.00 0.00 0.0000 4082.78 0.0000 60 20.66 0.08 0.03 2.5E-05 4082.78 0.0092

80 12.27 0.00 0.00 0.0000 2846.71 0.0000 80 12.27 0.05 0.02 1.5E-05 2846.71 0.0064

100 8.12 0.00 0.00 0.0000 2100.30 0.0000 100 8.12 0.03 0.01 1.0E-05 2100.30 0.0047

150 3.78 0.00 0.00 0.0000 1171.11 0.0000 150 3.78 0.01 0.01 4.7E-06 1171.11 0.0026

200 2.18 0.00 0.00 0.0000 763.65 0.0000 200 2.18 0.01 0.00 2.7E-06 763.65 0.0017

250 1.42 0.00 0.00 0.0000 545.14 0.0000 250 1.42 0.01 0.00 1.7E-06 545.14 0.0012

500 0.37 0.00 0.00 0.0000 192.37 0.0000 500 0.37 0.00 0.00 4.5E-07 192.37 0.0004

1000 0.10 0.00 0.00 0.0000 72.27 0.0000 1000 0.10 0.00 0.00 1.2E-07 72.27 0.0002

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 127.54 0.00 0.00 0.0000 10938.41 0.0000 20 0.47 0.20 0.0002 0.0245

30 67.72 0.00 0.00 0.0000 8158.81 0.0000 30 0.25 0.11 0.0001 0.0183

40 41.93 0.00 0.00 0.0000 6322.28 0.0000 40 0.16 0.07 0.0001 0.0142

50 28.51 0.00 0.00 0.0000 5024.56 0.0000 50 0.11 0.04 3.5E-05 0.0113

60 20.66 0.00 0.00 0.0000 4082.78 0.0000 60 0.08 0.03 2.5E-05 0.0092

80 12.27 0.00 0.00 0.0000 2846.71 0.0000 80 0.05 0.02 1.5E-05 0.0064

100 8.12 0.00 0.00 0.0000 2100.30 0.0000 100 0.03 0.01 1.0E-05 0.0047

150 3.78 0.00 0.00 0.0000 1171.11 0.0000 150 0.01 0.01 4.7E-06 0.0026

200 2.18 0.00 0.00 0.0000 763.65 0.0000 200 0.01 0.00 2.7E-06 0.0017

250 1.42 0.00 0.00 0.0000 545.14 0.0000 250 0.01 0.00 1.7E-06 0.0012

500 0.37 0.00 0.00 0.0000 192.37 0.0000 500 0.00 0.00 4.5E-07 0.0004

1000 0.10 0.00 0.00 0.0000 72.27 0.0000 1000 0.00 0.00 1.2E-07 0.0002

D-140
Averaged Multicomponent Health Impacts from Carburetor Cleaners for Facility G-01

Weightings: 1 68% Perc 10.4%

2 57% MeCl 89.6%

Total Health Impacts

Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center Resident Worker Chronic Acute

20 0.74 0.32 0.0017 0.0240

30 0.39 0.17 0.0009 0.0179

40 0.24 0.10 0.0006 0.0138

50 0.17 0.07 0.0004 0.0110

60 0.12 0.05 0.0003 0.0089

80 0.07 0.03 0.0002 0.0062

100 0.05 0.02 0.0001 0.0046

150 0.02 0.01 0.0001 0.0026

200 0.01 0.01 2.9E-05 0.0017

250 0.01 0.00 1.9E-05 0.0012

500 0.00 0.00 4.9E-06 0.0004

1000 0.00 0.00 1.3E-06 0.0002

D-141
Facility G-02 - 68% Perc

Met Set: Averaged

68% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0347 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0041 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.17 1.79 0.76 0.0087 4985.68 0.0087 20 74.17 0.00 0.00 0.0000 4985.68 0.0000

30 56.37 1.36 0.58 0.0066 4251.05 0.0074 30 56.37 0.00 0.00 0.0000 4251.05 0.0000

40 36.41 0.88 0.37 0.0043 3540.67 0.0061 40 36.41 0.00 0.00 0.0000 3540.67 0.0000

50 25.36 0.61 0.26 0.0030 3001.30 0.0052 50 25.36 0.00 0.00 0.0000 3001.30 0.0000

60 18.66 0.45 0.19 0.0022 2575.36 0.0045 60 18.66 0.00 0.00 0.0000 2575.36 0.0000

80 11.32 0.27 0.12 0.0013 1951.11 0.0034 80 11.32 0.00 0.00 0.0000 1951.11 0.0000

100 7.60 0.18 0.08 0.0009 1532.53 0.0027 100 7.60 0.00 0.00 0.0000 1532.53 0.0000

150 3.61 0.09 0.04 0.0004 943.04 0.0016 150 3.61 0.00 0.00 0.0000 943.04 0.0000

200 2.11 0.05 0.02 0.0002 647.01 0.0011 200 2.11 0.00 0.00 0.0000 647.01 0.0000

250 1.38 0.03 0.01 0.0002 477.16 0.0008 250 1.38 0.00 0.00 0.0000 477.16 0.0000

500 0.36 0.01 0.00 4.3E-05 180.51 0.0003 500 0.36 0.00 0.00 0.0000 180.51 0.0000

1000 0.10 0.00 0.00 1.1E-05 70.25 0.0001 1000 0.10 0.00 0.00 0.0000 70.25 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 74.17 0.00 0.00 0.0000 4985.68 0.0000 20 1.79 0.76 0.0087 0.0087

30 56.37 0.00 0.00 0.0000 4251.05 0.0000 30 1.36 0.58 0.0066 0.0074

40 36.41 0.00 0.00 0.0000 3540.67 0.0000 40 0.88 0.37 0.0043 0.0061

50 25.36 0.00 0.00 0.0000 3001.30 0.0000 50 0.61 0.26 0.0030 0.0052

60 18.66 0.00 0.00 0.0000 2575.36 0.0000 60 0.45 0.19 0.0022 0.0045

80 11.32 0.00 0.00 0.0000 1951.11 0.0000 80 0.27 0.12 0.0013 0.0034

100 7.60 0.00 0.00 0.0000 1532.53 0.0000 100 0.18 0.08 0.0009 0.0027

150 3.61 0.00 0.00 0.0000 943.04 0.0000 150 0.09 0.04 0.0004 0.0016

200 2.11 0.00 0.00 0.0000 647.01 0.0000 200 0.05 0.02 0.0002 0.0011

250 1.38 0.00 0.00 0.0000 477.16 0.0000 250 0.03 0.01 0.0002 0.0008

500 0.36 0.00 0.00 0.0000 180.51 0.0000 500 0.01 0.00 4.3E-05 0.0003

1000 0.10 0.00 0.00 0.0000 70.25 0.0000 1000 0.00 0.00 1.1E-05 0.0001

D-142
Facility G-02 - 57% MeCl

Met Set: Averaged

0% Perc 57% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0.0314

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0.0037

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.17 0.00 0.00 0.0000 4985.68 0.0000 20 74.17 0.27 0.12 0.0001 4985.68 0.0112

30 56.37 0.00 0.00 0.0000 4251.05 0.0000 30 56.37 0.21 0.09 0.0001 4251.05 0.0095

40 36.41 0.00 0.00 0.0000 3540.67 0.0000 40 36.41 0.13 0.06 4.5E-05 3540.67 0.0079

50 25.36 0.00 0.00 0.0000 3001.30 0.0000 50 25.36 0.09 0.04 3.1E-05 3001.30 0.0067

60 18.66 0.00 0.00 0.0000 2575.36 0.0000 60 18.66 0.07 0.03 2.3E-05 2575.36 0.0058

80 11.32 0.00 0.00 0.0000 1951.11 0.0000 80 11.32 0.04 0.02 1.4E-05 1951.11 0.0044

100 7.60 0.00 0.00 0.0000 1532.53 0.0000 100 7.60 0.03 0.01 9.4E-06 1532.53 0.0034

150 3.61 0.00 0.00 0.0000 943.04 0.0000 150 3.61 0.01 0.01 4.5E-06 943.04 0.0021

200 2.11 0.00 0.00 0.0000 647.01 0.0000 200 2.11 0.01 0.00 2.6E-06 647.01 0.0015

250 1.38 0.00 0.00 0.0000 477.16 0.0000 250 1.38 0.01 0.00 1.7E-06 477.16 0.0011

500 0.36 0.00 0.00 0.0000 180.51 0.0000 500 0.36 0.00 0.00 4.5E-07 180.51 0.0004

1000 0.10 0.00 0.00 0.0000 70.25 0.0000 1000 0.10 0.00 0.00 1.2E-07 70.25 0.0002

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 74.17 0.00 0.00 0.0000 4985.68 0.0000 20 0.27 0.12 0.0001 0.0112

30 56.37 0.00 0.00 0.0000 4251.05 0.0000 30 0.21 0.09 0.0001 0.0095

40 36.41 0.00 0.00 0.0000 3540.67 0.0000 40 0.13 0.06 4.5E-05 0.0079

50 25.36 0.00 0.00 0.0000 3001.30 0.0000 50 0.09 0.04 3.1E-05 0.0067

60 18.66 0.00 0.00 0.0000 2575.36 0.0000 60 0.07 0.03 2.3E-05 0.0058

80 11.32 0.00 0.00 0.0000 1951.11 0.0000 80 0.04 0.02 1.4E-05 0.0044

100 7.60 0.00 0.00 0.0000 1532.53 0.0000 100 0.03 0.01 9.4E-06 0.0034

150 3.61 0.00 0.00 0.0000 943.04 0.0000 150 0.01 0.01 4.5E-06 0.0021

200 2.11 0.00 0.00 0.0000 647.01 0.0000 200 0.01 0.00 2.6E-06 0.0015

250 1.38 0.00 0.00 0.0000 477.16 0.0000 250 0.01 0.00 1.7E-06 0.0011

500 0.36 0.00 0.00 0.0000 180.51 0.0000 500 0.00 0.00 4.5E-07 0.0004

1000 0.10 0.00 0.00 0.0000 70.25 0.0000 1000 0.00 0.00 1.2E-07 0.0002

D-143
Averaged Multicomponent Health Impacts from Carburetor Cleaners for Facility G-02

Weightings: 1 68% Perc 10.4%

2 57% MeCl 89.6%

Total Health Impacts

Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center Resident Worker Chronic Acute

20 0.43 0.18 0.0010 0.0109

30 0.33 0.14 0.0007 0.0093

40 0.21 0.09 0.0005 0.0078

50 0.15 0.06 0.0003 0.0066

60 0.11 0.05 0.0002 0.0056

80 0.07 0.03 0.0002 0.0043

100 0.04 0.02 0.0001 0.0034

150 0.02 0.01 4.8E-05 0.0021

200 0.01 0.01 2.8E-05 0.0014

250 0.01 0.00 1.8E-05 0.0010

500 0.00 0.00 4.8E-06 0.0004

1000 0.00 0.00 1.3E-06 0.0002

D-144
Facility G-03 - 68% Perc

Met Set: Averaged

68% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0347 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0041 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 16.68 0.40 0.17 0.0020 1231.74 0.0021 20 16.68 0.00 0.00 0.0000 1231.74 0.0000

30 33.45 0.81 0.34 0.0039 1650.82 0.0029 30 33.45 0.00 0.00 0.0000 1650.82 0.0000

40 27.02 0.65 0.28 0.0032 1484.02 0.0026 40 27.02 0.00 0.00 0.0000 1484.02 0.0000

50 25.03 0.61 0.26 0.0029 2079.26 0.0036 50 25.03 0.00 0.00 0.0000 2079.26 0.0000

60 20.90 0.51 0.22 0.0024 1915.91 0.0033 60 20.90 0.00 0.00 0.0000 1915.91 0.0000

80 12.23 0.30 0.13 0.0014 1479.75 0.0026 80 12.23 0.00 0.00 0.0000 1479.75 0.0000

100 8.02 0.19 0.08 0.0009 1184.75 0.0021 100 8.02 0.00 0.00 0.0000 1184.75 0.0000

150 3.71 0.09 0.04 0.0004 769.33 0.0013 150 3.71 0.00 0.00 0.0000 769.33 0.0000

200 2.14 0.05 0.02 0.0003 550.34 0.0010 200 2.14 0.00 0.00 0.0000 550.34 0.0000

250 1.39 0.03 0.01 0.0002 417.99 0.0007 250 1.39 0.00 0.00 0.0000 417.99 0.0000

500 0.36 0.01 0.00 4.3E-05 169.20 0.0003 500 0.36 0.00 0.00 0.0000 169.20 0.0000

1000 0.10 0.00 0.00 1.1E-05 68.13 0.0001 1000 0.10 0.00 0.00 0.0000 68.13 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 16.68 0.00 0.00 0.0000 1231.74 0.0000 20 0.40 0.17 0.0020 0.0021

30 33.45 0.00 0.00 0.0000 1650.82 0.0000 30 0.81 0.34 0.0039 0.0029

40 27.02 0.00 0.00 0.0000 1484.02 0.0000 40 0.65 0.28 0.0032 0.0026

50 25.03 0.00 0.00 0.0000 2079.26 0.0000 50 0.61 0.26 0.0029 0.0036

60 20.90 0.00 0.00 0.0000 1915.91 0.0000 60 0.51 0.22 0.0024 0.0033

80 12.23 0.00 0.00 0.0000 1479.75 0.0000 80 0.30 0.13 0.0014 0.0026

100 8.02 0.00 0.00 0.0000 1184.75 0.0000 100 0.19 0.08 0.0009 0.0021

150 3.71 0.00 0.00 0.0000 769.33 0.0000 150 0.09 0.04 0.0004 0.0013

200 2.14 0.00 0.00 0.0000 550.34 0.0000 200 0.05 0.02 0.0003 0.0010

250 1.39 0.00 0.00 0.0000 417.99 0.0000 250 0.03 0.01 0.0002 0.0007

500 0.36 0.00 0.00 0.0000 169.20 0.0000 500 0.01 0.00 4.3E-05 0.0003

1000 0.10 0.00 0.00 0.0000 68.13 0.0000 1000 0.00 0.00 1.1E-05 0.0001

D-145
Facility G-03 - 57% MeCl

Met Set: Averaged

0% Perc 57% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0.0314

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0.0037

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 16.68 0.00 0.00 0.0000 1231.74 0.0000 20 16.68 0.06 0.03 2.1E-05 1231.74 0.0028

30 33.45 0.00 0.00 0.0000 1650.82 0.0000 30 33.45 0.12 0.05 4.1E-05 1650.82 0.0037

40 27.02 0.00 0.00 0.0000 1484.02 0.0000 40 27.02 0.10 0.04 3.3E-05 1484.02 0.0033

50 25.03 0.00 0.00 0.0000 2079.26 0.0000 50 25.03 0.09 0.04 3.1E-05 2079.26 0.0047

60 20.90 0.00 0.00 0.0000 1915.91 0.0000 60 20.90 0.08 0.03 2.6E-05 1915.91 0.0043

80 12.23 0.00 0.00 0.0000 1479.75 0.0000 80 12.23 0.05 0.02 1.5E-05 1479.75 0.0033

100 8.02 0.00 0.00 0.0000 1184.75 0.0000 100 8.02 0.03 0.01 9.9E-06 1184.75 0.0027

150 3.71 0.00 0.00 0.0000 769.33 0.0000 150 3.71 0.01 0.01 4.6E-06 769.33 0.0017

200 2.14 0.00 0.00 0.0000 550.34 0.0000 200 2.14 0.01 0.00 2.6E-06 550.34 0.0012

250 1.39 0.00 0.00 0.0000 417.99 0.0000 250 1.39 0.01 0.00 1.7E-06 417.99 0.0009

500 0.36 0.00 0.00 0.0000 169.20 0.0000 500 0.36 0.00 0.00 4.5E-07 169.20 0.0004

1000 0.10 0.00 0.00 0.0000 68.13 0.0000 1000 0.10 0.00 0.00 1.2E-07 68.13 0.0002

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 16.68 0.00 0.00 0.0000 1231.74 0.0000 20 0.06 0.03 2.1E-05 0.0028

30 33.45 0.00 0.00 0.0000 1650.82 0.0000 30 0.12 0.05 4.1E-05 0.0037

40 27.02 0.00 0.00 0.0000 1484.02 0.0000 40 0.10 0.04 3.3E-05 0.0033

50 25.03 0.00 0.00 0.0000 2079.26 0.0000 50 0.09 0.04 3.1E-05 0.0047

60 20.90 0.00 0.00 0.0000 1915.91 0.0000 60 0.08 0.03 2.6E-05 0.0043

80 12.23 0.00 0.00 0.0000 1479.75 0.0000 80 0.05 0.02 1.5E-05 0.0033

100 8.02 0.00 0.00 0.0000 1184.75 0.0000 100 0.03 0.01 9.9E-06 0.0027

150 3.71 0.00 0.00 0.0000 769.33 0.0000 150 0.01 0.01 4.6E-06 0.0017

200 2.14 0.00 0.00 0.0000 550.34 0.0000 200 0.01 0.00 2.6E-06 0.0012

250 1.39 0.00 0.00 0.0000 417.99 0.0000 250 0.01 0.00 1.7E-06 0.0009

500 0.36 0.00 0.00 0.0000 169.20 0.0000 500 0.00 0.00 4.5E-07 0.0004

1000 0.10 0.00 0.00 0.0000 68.13 0.0000 1000 0.00 0.00 1.2E-07 0.0002

D-146
Averaged Multicomponent Health Impacts from Carburetor Cleaners for Facility G-03

Weightings: 1 68% Perc 10.4%

2 57% MeCl 89.6%

Total Health Impacts

Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center Resident Worker Chronic Acute

20 0.10 0.04 0.0002 0.0027

30 0.20 0.08 0.0004 0.0036

40 0.16 0.07 0.0004 0.0033

50 0.15 0.06 0.0003 0.0046

60 0.12 0.05 0.0003 0.0042

80 0.07 0.03 0.0002 0.0032

100 0.05 0.02 0.0001 0.0026

150 0.02 0.01 4.9E-05 0.0017

200 0.01 0.01 2.8E-05 0.0012

250 0.01 0.00 1.9E-05 0.0009

500 0.00 0.00 4.8E-06 0.0004

1000 0.00 0.00 1.3E-06 0.0001

D-147
Risk Assessment Summary - 3 Generic Facilities

Multicomponent Impacts - Carburetor Cleaners - Default Met

Facility G-01 - 68% Perc

Met Set: Default-0

68% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0347 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0041 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 307.03 7.43 3.16 0.0360 11342.73 0.0197 20 307.03 0.00 0.00 0.0000 11342.73 0.0000

30 229.98 5.56 2.37 0.0269 8496.33 0.0147 30 229.98 0.00 0.00 0.0000 8496.33 0.0000

40 178.09 4.31 1.83 0.0209 6579.11 0.0114 40 178.09 0.00 0.00 0.0000 6579.11 0.0000

50 141.80 3.43 1.46 0.0166 5238.72 0.0091 50 141.80 0.00 0.00 0.0000 5238.72 0.0000

60 115.56 2.80 1.19 0.0135 4269.33 0.0074 60 115.56 0.00 0.00 0.0000 4269.33 0.0000

80 81.09 1.96 0.84 0.0095 2995.85 0.0052 80 81.09 0.00 0.00 0.0000 2995.85 0.0000

100 60.18 1.46 0.62 0.0070 2223.11 0.0039 100 60.18 0.00 0.00 0.0000 2223.11 0.0000

150 33.55 0.81 0.35 0.0039 1239.31 0.0022 150 33.55 0.00 0.00 0.0000 1239.31 0.0000

200 21.63 0.52 0.22 0.0025 799.09 0.0014 200 21.63 0.00 0.00 0.0000 799.09 0.0000

250 15.25 0.37 0.16 0.0018 563.57 0.0010 250 15.25 0.00 0.00 0.0000 563.57 0.0000

500 5.08 0.12 0.05 0.0006 187.51 0.0003 500 5.08 0.00 0.00 0.0000 187.51 0.0000

1000 1.74 0.04 0.02 0.0002 64.26 0.0001 1000 1.74 0.00 0.00 0.0000 64.26 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 307.03 0.00 0.00 0.0000 11342.73 0.0000 20 7.43 3.16 0.0360 0.0197

30 229.98 0.00 0.00 0.0000 8496.33 0.0000 30 5.56 2.37 0.0269 0.0147

40 178.09 0.00 0.00 0.0000 6579.11 0.0000 40 4.31 1.83 0.0209 0.0114

50 141.80 0.00 0.00 0.0000 5238.72 0.0000 50 3.43 1.46 0.0166 0.0091

60 115.56 0.00 0.00 0.0000 4269.33 0.0000 60 2.80 1.19 0.0135 0.0074

80 81.09 0.00 0.00 0.0000 2995.85 0.0000 80 1.96 0.84 0.0095 0.0052

100 60.18 0.00 0.00 0.0000 2223.11 0.0000 100 1.46 0.62 0.0070 0.0039

150 33.55 0.00 0.00 0.0000 1239.31 0.0000 150 0.81 0.35 0.0039 0.0022

200 21.63 0.00 0.00 0.0000 799.09 0.0000 200 0.52 0.22 0.0025 0.0014

250 15.25 0.00 0.00 0.0000 563.57 0.0000 250 0.37 0.16 0.0018 0.0010

500 5.08 0.00 0.00 0.0000 187.51 0.0000 500 0.12 0.05 0.0006 0.0003

1000 1.74 0.00 0.00 0.0000 64.26 0.0000 1000 0.04 0.02 0.0002 0.0001

D-148
Facility G-01 - 57% MeCl

Met Set: Default-0

0% Perc 57% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0.0314

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0.0037

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 307.03 0.00 0.00 0.0000 11342.73 0.0000 20 307.03 1.14 0.48 0.0004 11342.73 0.0254

30 229.98 0.00 0.00 0.0000 8496.33 0.0000 30 229.98 0.85 0.36 0.0003 8496.33 0.0191

40 178.09 0.00 0.00 0.0000 6579.11 0.0000 40 178.09 0.66 0.28 0.0002 6579.11 0.0148

50 141.80 0.00 0.00 0.0000 5238.72 0.0000 50 141.80 0.52 0.22 0.0002 5238.72 0.0117

60 115.56 0.00 0.00 0.0000 4269.33 0.0000 60 115.56 0.43 0.18 0.0001 4269.33 0.0096

80 81.09 0.00 0.00 0.0000 2995.85 0.0000 80 81.09 0.30 0.13 0.0001 2995.85 0.0067

100 60.18 0.00 0.00 0.0000 2223.11 0.0000 100 60.18 0.22 0.09 0.0001 2223.11 0.0050

150 33.55 0.00 0.00 0.0000 1239.31 0.0000 150 33.55 0.12 0.05 4.1E-05 1239.31 0.0028

200 21.63 0.00 0.00 0.0000 799.09 0.0000 200 21.63 0.08 0.03 2.7E-05 799.09 0.0018

250 15.25 0.00 0.00 0.0000 563.57 0.0000 250 15.25 0.06 0.02 1.9E-05 563.57 0.0013

500 5.08 0.00 0.00 0.0000 187.51 0.0000 500 5.08 0.02 0.01 6.3E-06 187.51 0.0004

1000 1.74 0.00 0.00 0.0000 64.26 0.0000 1000 1.74 0.01 0.00 2.1E-06 64.26 0.0001

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 307.03 0.00 0.00 0.0000 11342.73 0.0000 20 1.14 0.48 0.0004 0.0254

30 229.98 0.00 0.00 0.0000 8496.33 0.0000 30 0.85 0.36 0.0003 0.0191

40 178.09 0.00 0.00 0.0000 6579.11 0.0000 40 0.66 0.28 0.0002 0.0148

50 141.80 0.00 0.00 0.0000 5238.72 0.0000 50 0.52 0.22 0.0002 0.0117

60 115.56 0.00 0.00 0.0000 4269.33 0.0000 60 0.43 0.18 0.0001 0.0096

80 81.09 0.00 0.00 0.0000 2995.85 0.0000 80 0.30 0.13 0.0001 0.0067

100 60.18 0.00 0.00 0.0000 2223.11 0.0000 100 0.22 0.09 0.0001 0.0050

150 33.55 0.00 0.00 0.0000 1239.31 0.0000 150 0.12 0.05 4.1E-05 0.0028

200 21.63 0.00 0.00 0.0000 799.09 0.0000 200 0.08 0.03 2.7E-05 0.0018

250 15.25 0.00 0.00 0.0000 563.57 0.0000 250 0.06 0.02 1.9E-05 0.0013

500 5.08 0.00 0.00 0.0000 187.51 0.0000 500 0.02 0.01 6.3E-06 0.0004

1000 1.74 0.00 0.00 0.0000 64.26 0.0000 1000 0.01 0.00 2.1E-06 0.0001

D-149
Averaged Multicomponent Health Impacts from Carburetor Cleaners for Facility G-01

Weightings: 1 68% Perc 10.4%

2 57% MeCl 89.6%

Total Health Impacts

Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope Resident Worker Chronic Acute

20 1.79 0.76 0.0041 0.0248

30 1.34 0.57 0.0031 0.0186

40 1.04 0.44 0.0024 0.0144

50 0.83 0.35 0.0019 0.0115

60 0.67 0.29 0.0015 0.0094

80 0.47 0.20 0.0011 0.0066

100 0.35 0.15 0.0008 0.0049

150 0.20 0.08 0.0004 0.0027

200 0.13 0.05 0.0003 0.0018

250 0.09 0.04 0.0002 0.0012

500 0.03 0.01 0.0001 0.0004

1000 0.01 0.00 2.3E-05 0.0001

D-150
Facility G-02 - 68% Perc

Met Set: Default-0

68% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0347 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0041 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 142.83 3.45 1.47 0.0167 5276.51 0.0092 20 142.83 0.00 0.00 0.0000 5276.51 0.0000

30 117.98 2.85 1.21 0.0138 4358.64 0.0076 30 117.98 0.00 0.00 0.0000 4358.64 0.0000

40 98.78 2.39 1.02 0.0116 3649.09 0.0063 40 98.78 0.00 0.00 0.0000 3649.09 0.0000

50 83.77 2.03 0.86 0.0098 3094.79 0.0054 50 83.77 0.00 0.00 0.0000 3094.79 0.0000

60 71.89 1.74 0.74 0.0084 2656.01 0.0046 60 71.89 0.00 0.00 0.0000 2656.01 0.0000

80 54.62 1.32 0.56 0.0064 2017.7 0.0035 80 54.62 0.00 0.00 0.0000 2017.70 0.0000

100 42.94 1.04 0.44 0.0050 1586.22 0.0028 100 42.94 0.00 0.00 0.0000 1586.22 0.0000

150 26.25 0.63 0.27 0.0031 969.72 0.0017 150 26.25 0.00 0.00 0.0000 969.72 0.0000

200 17.86 0.43 0.18 0.0021 659.99 0.0011 200 17.86 0.00 0.00 0.0000 659.99 0.0000

250 13.05 0.32 0.13 0.0015 482.19 0.0008 250 13.05 0.00 0.00 0.0000 482.19 0.0000

500 4.69 0.11 0.05 0.0005 173.33 0.0003 500 4.69 0.00 0.00 0.0000 173.33 0.0000

1000 1.68 0.04 0.02 0.0002 61.9 0.0001 1000 1.68 0.00 0.00 0.0000 61.90 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 142.83 0.00 0.00 0.0000 5276.51 0.0000 20 3.45 1.47 0.0167 0.0092

30 117.98 0.00 0.00 0.0000 4358.64 0.0000 30 2.85 1.21 0.0138 0.0076

40 98.78 0.00 0.00 0.0000 3649.09 0.0000 40 2.39 1.02 0.0116 0.0063

50 83.77 0.00 0.00 0.0000 3094.79 0.0000 50 2.03 0.86 0.0098 0.0054

60 71.89 0.00 0.00 0.0000 2656.01 0.0000 60 1.74 0.74 0.0084 0.0046

80 54.62 0.00 0.00 0.0000 2017.70 0.0000 80 1.32 0.56 0.0064 0.0035

100 42.94 0.00 0.00 0.0000 1586.22 0.0000 100 1.04 0.44 0.0050 0.0028

150 26.25 0.00 0.00 0.0000 969.72 0.0000 150 0.63 0.27 0.0031 0.0017

200 17.86 0.00 0.00 0.0000 659.99 0.0000 200 0.43 0.18 0.0021 0.0011

250 13.05 0.00 0.00 0.0000 482.19 0.0000 250 0.32 0.13 0.0015 0.0008

500 4.69 0.00 0.00 0.0000 173.33 0.0000 500 0.11 0.05 0.0005 0.0003

1000 1.68 0.00 0.00 0.0000 61.90 0.0000 1000 0.04 0.02 0.0002 0.0001

D-151
Facility G-02 - 57% MeCl

Met Set: Default-0

0% Perc 57% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0.0314

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0.0037

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 142.83 0.00 0.00 0.0000 5276.51 0.0000 20 142.83 0.53 0.22 0.0002 5276.51 0.0118

30 117.98 0.00 0.00 0.0000 4358.64 0.0000 30 117.98 0.44 0.19 0.0001 4358.64 0.0098

40 98.78 0.00 0.00 0.0000 3649.09 0.0000 40 98.78 0.37 0.16 0.0001 3649.09 0.0082

50 83.77 0.00 0.00 0.0000 3094.79 0.0000 50 83.77 0.31 0.13 0.0001 3094.79 0.0069

60 71.89 0.00 0.00 0.0000 2656.01 0.0000 60 71.89 0.27 0.11 0.0001 2656.01 0.0060

80 54.62 0.00 0.00 0.0000 2017.70 0.0000 80 54.62 0.20 0.09 0.0001 2017.70 0.0045

100 42.94 0.00 0.00 0.0000 1586.22 0.0000 100 42.94 0.16 0.07 0.0001 1586.22 0.0036

150 26.25 0.00 0.00 0.0000 969.72 0.0000 150 26.25 0.10 0.04 3.2E-05 969.72 0.0022

200 17.86 0.00 0.00 0.0000 659.99 0.0000 200 17.86 0.07 0.03 2.2E-05 659.99 0.0015

250 13.05 0.00 0.00 0.0000 482.19 0.0000 250 13.05 0.05 0.02 1.6E-05 482.19 0.0011

500 4.69 0.00 0.00 0.0000 173.33 0.0000 500 4.69 0.02 0.01 5.8E-06 173.33 0.0004

1000 1.68 0.00 0.00 0.0000 61.90 0.0000 1000 1.68 0.01 0.00 2.1E-06 61.90 0.0001

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 142.83 0.00 0.00 0.0000 5276.51 0.0000 20 0.53 0.22 0.0002 0.0118

30 117.98 0.00 0.00 0.0000 4358.64 0.0000 30 0.44 0.19 0.0001 0.0098

40 98.78 0.00 0.00 0.0000 3649.09 0.0000 40 0.37 0.16 0.0001 0.0082

50 83.77 0.00 0.00 0.0000 3094.79 0.0000 50 0.31 0.13 0.0001 0.0069

60 71.89 0.00 0.00 0.0000 2656.01 0.0000 60 0.27 0.11 0.0001 0.0060

80 54.62 0.00 0.00 0.0000 2017.70 0.0000 80 0.20 0.09 0.0001 0.0045

100 42.94 0.00 0.00 0.0000 1586.22 0.0000 100 0.16 0.07 0.0001 0.0036

150 26.25 0.00 0.00 0.0000 969.72 0.0000 150 0.10 0.04 3.2E-05 0.0022

200 17.86 0.00 0.00 0.0000 659.99 0.0000 200 0.07 0.03 2.2E-05 0.0015

250 13.05 0.00 0.00 0.0000 482.19 0.0000 250 0.05 0.02 1.6E-05 0.0011

500 4.69 0.00 0.00 0.0000 173.33 0.0000 500 0.02 0.01 5.8E-06 0.0004

1000 1.68 0.00 0.00 0.0000 61.90 0.0000 1000 0.01 0.00 2.1E-06 0.0001

D-152
Averaged Multicomponent Health Impacts from Carburetor Cleaners for Facility G-02

Weightings: 1 68% Perc 10.4%

2 57% MeCl 89.6%

Total Health Impacts

Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope Resident Worker Chronic Acute

20 0.83 0.35 0.0019 0.0116

30 0.69 0.29 0.0016 0.0095

40 0.58 0.25 0.0013 0.0080

50 0.49 0.21 0.0011 0.0068

60 0.42 0.18 0.0010 0.0058

80 0.32 0.14 0.0007 0.0044

100 0.25 0.11 0.0006 0.0035

150 0.15 0.07 0.0003 0.0021

200 0.10 0.04 0.0002 0.0014

250 0.08 0.03 0.0002 0.0011

500 0.03 0.01 0.0001 0.0004

1000 0.01 0.00 2.2E-05 0.0001

D-153
Facility G-03 - 68% Perc

Met Set: Default-0

68% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0347 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0041 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.30 1.80 0.77 0.0087 2744.96 0.0048 20 74.30 0.00 0.00 0.0000 2744.96 0.0000

30 64.57 1.56 0.66 0.0076 2385.45 0.0041 30 64.57 0.00 0.00 0.0000 2385.45 0.0000

40 56.52 1.37 0.58 0.0066 2088.05 0.0036 40 56.52 0.00 0.00 0.0000 2088.05 0.0000

50 49.84 1.21 0.51 0.0058 1841.4 0.0032 50 49.84 0.00 0.00 0.0000 1841.40 0.0000

60 44.27 1.07 0.46 0.0052 1635.59 0.0028 60 44.27 0.00 0.00 0.0000 1635.59 0.0000

80 35.62 0.86 0.37 0.0042 1315.96 0.0023 80 35.62 0.00 0.00 0.0000 1315.96 0.0000

100 29.32 0.71 0.30 0.0034 1083.1 0.0019 100 29.32 0.00 0.00 0.0000 1083.10 0.0000

150 19.45 0.47 0.20 0.0023 718.69 0.0012 150 19.45 0.00 0.00 0.0000 718.69 0.0000

200 13.97 0.34 0.14 0.0016 516.25 0.0009 200 13.97 0.00 0.00 0.0000 516.25 0.0000

250 10.61 0.26 0.11 0.0012 391.81 0.0007 250 10.61 0.00 0.00 0.0000 391.81 0.0000

500 4.18 0.10 0.04 0.0005 154.56 0.0003 500 4.18 0.00 0.00 0.0000 154.56 0.0000

1000 1.58 0.04 0.02 0.0002 58.4 0.0001 1000 1.58 0.00 0.00 0.0000 58.40 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 74.30 0.00 0.00 0.0000 2744.96 0.0000 20 1.80 0.77 0.0087 0.0048

30 64.57 0.00 0.00 0.0000 2385.45 0.0000 30 1.56 0.66 0.0076 0.0041

40 56.52 0.00 0.00 0.0000 2088.05 0.0000 40 1.37 0.58 0.0066 0.0036

50 49.84 0.00 0.00 0.0000 1841.40 0.0000 50 1.21 0.51 0.0058 0.0032

60 44.27 0.00 0.00 0.0000 1635.59 0.0000 60 1.07 0.46 0.0052 0.0028

80 35.62 0.00 0.00 0.0000 1315.96 0.0000 80 0.86 0.37 0.0042 0.0023

100 29.32 0.00 0.00 0.0000 1083.10 0.0000 100 0.71 0.30 0.0034 0.0019

150 19.45 0.00 0.00 0.0000 718.69 0.0000 150 0.47 0.20 0.0023 0.0012

200 13.97 0.00 0.00 0.0000 516.25 0.0000 200 0.34 0.14 0.0016 0.0009

250 10.61 0.00 0.00 0.0000 391.81 0.0000 250 0.26 0.11 0.0012 0.0007

500 4.18 0.00 0.00 0.0000 154.56 0.0000 500 0.10 0.04 0.0005 0.0003

1000 1.58 0.00 0.00 0.0000 58.40 0.0000 1000 0.04 0.02 0.0002 0.0001

D-154
Facility G-03 - 57% MeCl

Met Set: Default-0

0% Perc 57% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0.0314

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0.0037

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.30 0.00 0.00 0.0000 2744.96 0.0000 20 74.30 0.27 0.12 0.0001 2744.96 0.0062

30 64.57 0.00 0.00 0.0000 2385.45 0.0000 30 64.57 0.24 0.10 0.0001 2385.45 0.0054

40 56.52 0.00 0.00 0.0000 2088.05 0.0000 40 56.52 0.21 0.09 0.0001 2088.05 0.0047

50 49.84 0.00 0.00 0.0000 1841.40 0.0000 50 49.84 0.18 0.08 0.0001 1841.40 0.0041

60 44.27 0.00 0.00 0.0000 1635.59 0.0000 60 44.27 0.16 0.07 0.0001 1635.59 0.0037

80 35.62 0.00 0.00 0.0000 1315.96 0.0000 80 35.62 0.13 0.06 4.4E-05 1315.96 0.0030

100 29.32 0.00 0.00 0.0000 1083.10 0.0000 100 29.32 0.11 0.05 3.6E-05 1083.10 0.0024

150 19.45 0.00 0.00 0.0000 718.69 0.0000 150 19.45 0.07 0.03 2.4E-05 718.69 0.0016

200 13.97 0.00 0.00 0.0000 516.25 0.0000 200 13.97 0.05 0.02 1.7E-05 516.25 0.0012

250 10.61 0.00 0.00 0.0000 391.81 0.0000 250 10.61 0.04 0.02 1.3E-05 391.81 0.0009

500 4.18 0.00 0.00 0.0000 154.56 0.0000 500 4.18 0.02 0.01 5.2E-06 154.56 0.0003

1000 1.58 0.00 0.00 0.0000 58.40 0.0000 1000 1.58 0.01 0.00 1.9E-06 58.40 0.0001

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 74.30 0.00 0.00 0.0000 2744.96 0.0000 20 0.27 0.12 0.0001 0.0062

30 64.57 0.00 0.00 0.0000 2385.45 0.0000 30 0.24 0.10 0.0001 0.0054

40 56.52 0.00 0.00 0.0000 2088.05 0.0000 40 0.21 0.09 0.0001 0.0047

50 49.84 0.00 0.00 0.0000 1841.40 0.0000 50 0.18 0.08 0.0001 0.0041

60 44.27 0.00 0.00 0.0000 1635.59 0.0000 60 0.16 0.07 0.0001 0.0037

80 35.62 0.00 0.00 0.0000 1315.96 0.0000 80 0.13 0.06 4.4E-05 0.0030

100 29.32 0.00 0.00 0.0000 1083.10 0.0000 100 0.11 0.05 3.6E-05 0.0024

150 19.45 0.00 0.00 0.0000 718.69 0.0000 150 0.07 0.03 2.4E-05 0.0016

200 13.97 0.00 0.00 0.0000 516.25 0.0000 200 0.05 0.02 1.7E-05 0.0012

250 10.61 0.00 0.00 0.0000 391.81 0.0000 250 0.04 0.02 1.3E-05 0.0009

500 4.18 0.00 0.00 0.0000 154.56 0.0000 500 0.02 0.01 5.2E-06 0.0003

1000 1.58 0.00 0.00 0.0000 58.40 0.0000 1000 0.01 0.00 1.9E-06 0.0001

D-155
Averaged Multicomponent Health Impacts from Carburetor Cleaners for Facility G-03

Weightings: 1 68% Perc 10.4%

2 57% MeCl 89.6%

Total Health Impacts

Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope Resident Worker Chronic Acute

20 0.43 0.18 0.0010 0.0060

30 0.38 0.16 0.0009 0.0052

40 0.33 0.14 0.0008 0.0046

50 0.29 0.12 0.0007 0.0040

60 0.26 0.11 0.0006 0.0036

80 0.21 0.09 0.0005 0.0029

100 0.17 0.07 0.0004 0.0024

150 0.11 0.05 0.0003 0.0016

200 0.08 0.03 0.0002 0.0011

250 0.06 0.03 0.0001 0.0009

500 0.02 0.01 0.0001 0.0003

1000 0.01 0.00 2.1E-05 0.0001

D-156
Risk Assessment Summary - 3 Generic Facilities

Multicomponent Impacts - Engine Degreasers - Average of 10 Met Sets

Facility G-01 - 47% Perc

Met Set: Averaged

47% 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0708 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0035 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 127.54 2.63 1.12 0.0128 10938.41 0.0387 20 127.54 0.00 0.00 0.0000 10938.41 0.0000

30 67.72 1.40 0.60 0.0068 8158.81 0.0289 30 67.72 0.00 0.00 0.0000 8158.81 0.0000

40 41.93 0.87 0.37 0.0042 6322.28 0.0224 40 41.93 0.00 0.00 0.0000 6322.28 0.0000

50 28.51 0.59 0.25 0.0029 5024.56 0.0178 50 28.51 0.00 0.00 0.0000 5024.56 0.0000

60 20.66 0.43 0.18 0.0021 4082.78 0.0145 60 20.66 0.00 0.00 0.0000 4082.78 0.0000

80 12.27 0.25 0.11 0.0012 2846.71 0.0101 80 12.27 0.00 0.00 0.0000 2846.71 0.0000

100 8.12 0.17 0.07 0.0008 2100.30 0.0074 100 8.12 0.00 0.00 0.0000 2100.30 0.0000

150 3.78 0.08 0.03 0.0004 1171.11 0.0041 150 3.78 0.00 0.00 0.0000 1171.11 0.0000

200 2.18 0.05 0.02 0.0002 763.65 0.0027 200 2.18 0.00 0.00 0.0000 763.65 0.0000

250 1.42 0.03 0.01 0.0001 545.14 0.0019 250 1.42 0.00 0.00 0.0000 545.14 0.0000

500 0.37 0.01 0.00 3.7E-05 192.37 0.0007 500 0.37 0.00 0.00 0.0000 192.37 0.0000

1000 0.10 0.00 0.00 9.6E-06 72.27 0.0003 1000 0.10 0.00 0.00 0.0000 72.27 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 127.54 0.00 0.00 0.0000 10938.41 0.0000 20 2.63 1.12 0.0128 0.0387

30 67.72 0.00 0.00 0.0000 8158.81 0.0000 30 1.40 0.60 0.0068 0.0289

40 41.93 0.00 0.00 0.0000 6322.28 0.0000 40 0.87 0.37 0.0042 0.0224

50 28.51 0.00 0.00 0.0000 5024.56 0.0000 50 0.59 0.25 0.0029 0.0178

60 20.66 0.00 0.00 0.0000 4082.78 0.0000 60 0.43 0.18 0.0021 0.0145

80 12.27 0.00 0.00 0.0000 2846.71 0.0000 80 0.25 0.11 0.0012 0.0101

100 8.12 0.00 0.00 0.0000 2100.30 0.0000 100 0.17 0.07 0.0008 0.0074

150 3.78 0.00 0.00 0.0000 1171.11 0.0000 150 0.08 0.03 0.0004 0.0041

200 2.18 0.00 0.00 0.0000 763.65 0.0000 200 0.05 0.02 0.0002 0.0027

250 1.42 0.00 0.00 0.0000 545.14 0.0000 250 0.03 0.01 0.0001 0.0019

500 0.37 0.00 0.00 0.0000 192.37 0.0000 500 0.01 0.00 3.7E-05 0.0007

1000 0.10 0.00 0.00 0.0000 72.27 0.0000 1000 0.00 0.00 9.6E-06 0.0003

D-157
Facility G-01 - 99% TCE

Met Set: Averaged

0% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 127.54 0.00 0.00 0.0000 10938.41 0.0000 20 127.54 0.00 0.00 0.0000 10938.41 0.0000

30 67.72 0.00 0.00 0.0000 8158.81 0.0000 30 67.72 0.00 0.00 0.0000 8158.81 0.0000

40 41.93 0.00 0.00 0.0000 6322.28 0.0000 40 41.93 0.00 0.00 0.0000 6322.28 0.0000

50 28.51 0.00 0.00 0.0000 5024.56 0.0000 50 28.51 0.00 0.00 0.0000 5024.56 0.0000

60 20.66 0.00 0.00 0.0000 4082.78 0.0000 60 20.66 0.00 0.00 0.0000 4082.78 0.0000

80 12.27 0.00 0.00 0.0000 2846.71 0.0000 80 12.27 0.00 0.00 0.0000 2846.71 0.0000

100 8.12 0.00 0.00 0.0000 2100.30 0.0000 100 8.12 0.00 0.00 0.0000 2100.30 0.0000

150 3.78 0.00 0.00 0.0000 1171.11 0.0000 150 3.78 0.00 0.00 0.0000 1171.11 0.0000

200 2.18 0.00 0.00 0.0000 763.65 0.0000 200 2.18 0.00 0.00 0.0000 763.65 0.0000

250 1.42 0.00 0.00 0.0000 545.14 0.0000 250 1.42 0.00 0.00 0.0000 545.14 0.0000

500 0.37 0.00 0.00 0.0000 192.37 0.0000 500 0.37 0.00 0.00 0.0000 192.37 0.0000

1000 0.10 0.00 0.00 0.0000 72.27 0.0000 1000 0.10 0.00 0.00 0.0000 72.27 0.0000

99% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.1492

Ann Rate [g/s]: 0.0074

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 127.54 1.89 0.80 0.0015 10938.41 0.0000 20 1.89 0.80 0.0015 0.0000

30 67.72 1.00 0.43 0.0008 8158.81 0.0000 30 1.00 0.43 0.0008 0.0000

40 41.93 0.62 0.26 0.0005 6322.28 0.0000 40 0.62 0.26 0.0005 0.0000

50 28.51 0.42 0.18 0.0003 5024.56 0.0000 50 0.42 0.18 0.0003 0.0000

60 20.66 0.31 0.13 0.0002 4082.78 0.0000 60 0.31 0.13 0.0002 0.0000

80 12.27 0.18 0.08 0.0001 2846.71 0.0000 80 0.18 0.08 0.0001 0.0000

100 8.12 0.12 0.05 0.0001 2100.30 0.0000 100 0.12 0.05 0.0001 0.0000

150 3.78 0.06 0.02 4.4E-05 1171.11 0.0000 150 0.06 0.02 4.4E-05 0.0000

200 2.18 0.03 0.01 2.5E-05 763.65 0.0000 200 0.03 0.01 2.5E-05 0.0000

250 1.42 0.02 0.01 1.6E-05 545.14 0.0000 250 0.02 0.01 1.6E-05 0.0000

500 0.37 0.01 0.00 4.3E-06 192.37 0.0000 500 0.01 0.00 4.3E-06 0.0000

1000 0.10 0.00 0.00 1.1E-06 72.27 0.0000 1000 0.00 0.00 1.1E-06 0.0000

D-158
Averaged Multicomponent Health Impacts from Engine Degreasers for Facility G-01

Weightings: 1 47% Perc 41.0%

2 99% TCE 59.0%

Total Health Impacts

Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center Resident Worker Chronic Acute

20 2.19 0.93 0.0061 0.0159

30 1.16 0.50 0.0032 0.0118

40 0.72 0.31 0.0020 0.0092

50 0.49 0.21 0.0014 0.0073

60 0.36 0.15 0.0010 0.0059

80 0.21 0.09 0.0006 0.0041

100 0.14 0.06 0.0004 0.0030

150 0.07 0.03 0.0002 0.0017

200 0.04 0.02 0.0001 0.0011

250 0.02 0.01 0.0001 0.0008

500 0.01 0.00 1.8E-05 0.0003

1000 0.00 0.00 4.6E-06 1.0E-04

D-159
Facility G-02 - 47% Perc

Met Set: Averaged

47% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0708 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0035 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.17 1.53 0.65 0.0074 4985.68 0.0176 20 74.17 0.00 0.00 0.0000 4985.68 0.0000

30 56.37 1.16 0.50 0.0056 4251.05 0.0150 30 56.37 0.00 0.00 0.0000 4251.05 0.0000

40 36.41 0.75 0.32 0.0036 3540.67 0.0125 40 36.41 0.00 0.00 0.0000 3540.67 0.0000

50 25.36 0.52 0.22 0.0025 3001.30 0.0106 50 25.36 0.00 0.00 0.0000 3001.30 0.0000

60 18.66 0.39 0.16 0.0019 2575.36 0.0091 60 18.66 0.00 0.00 0.0000 2575.36 0.0000

80 11.32 0.23 0.10 0.0011 1951.11 0.0069 80 11.32 0.00 0.00 0.0000 1951.11 0.0000

100 7.60 0.16 0.07 0.0008 1532.53 0.0054 100 7.60 0.00 0.00 0.0000 1532.53 0.0000

150 3.61 0.07 0.03 0.0004 943.04 0.0033 150 3.61 0.00 0.00 0.0000 943.04 0.0000

200 2.11 0.04 0.02 0.0002 647.01 0.0023 200 2.11 0.00 0.00 0.0000 647.01 0.0000

250 1.38 0.03 0.01 0.0001 477.16 0.0017 250 1.38 0.00 0.00 0.0000 477.16 0.0000

500 0.36 0.01 0.00 3.6E-05 180.51 0.0006 500 0.36 0.00 0.00 0.0000 180.51 0.0000

1000 0.10 0.00 0.00 9.6E-06 70.25 0.0002 1000 0.10 0.00 0.00 0.0000 70.25 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 74.17 0.00 0.00 0.0000 4985.68 0.0000 20 1.53 0.65 0.0074 0.0176

30 56.37 0.00 0.00 0.0000 4251.05 0.0000 30 1.16 0.50 0.0056 0.0150

40 36.41 0.00 0.00 0.0000 3540.67 0.0000 40 0.75 0.32 0.0036 0.0125

50 25.36 0.00 0.00 0.0000 3001.30 0.0000 50 0.52 0.22 0.0025 0.0106

60 18.66 0.00 0.00 0.0000 2575.36 0.0000 60 0.39 0.16 0.0019 0.0091

80 11.32 0.00 0.00 0.0000 1951.11 0.0000 80 0.23 0.10 0.0011 0.0069

100 7.60 0.00 0.00 0.0000 1532.53 0.0000 100 0.16 0.07 0.0008 0.0054

150 3.61 0.00 0.00 0.0000 943.04 0.0000 150 0.07 0.03 0.0004 0.0033

200 2.11 0.00 0.00 0.0000 647.01 0.0000 200 0.04 0.02 0.0002 0.0023

250 1.38 0.00 0.00 0.0000 477.16 0.0000 250 0.03 0.01 0.0001 0.0017

500 0.36 0.00 0.00 0.0000 180.51 0.0000 500 0.01 0.00 3.6E-05 0.0006

1000 0.10 0.00 0.00 0.0000 70.25 0.0000 1000 0.00 0.00 9.6E-06 0.0002

D-160
Facility G-02 - 99% TCE

Met Set: Averaged

0% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.17 0.00 0.00 0.0000 4985.68 0.0000 20 74.17 0.00 0.00 0.0000 4985.68 0.0000

30 56.37 0.00 0.00 0.0000 4251.05 0.0000 30 56.37 0.00 0.00 0.0000 4251.05 0.0000

40 36.41 0.00 0.00 0.0000 3540.67 0.0000 40 36.41 0.00 0.00 0.0000 3540.67 0.0000

50 25.36 0.00 0.00 0.0000 3001.30 0.0000 50 25.36 0.00 0.00 0.0000 3001.30 0.0000

60 18.66 0.00 0.00 0.0000 2575.36 0.0000 60 18.66 0.00 0.00 0.0000 2575.36 0.0000

80 11.32 0.00 0.00 0.0000 1951.11 0.0000 80 11.32 0.00 0.00 0.0000 1951.11 0.0000

100 7.60 0.00 0.00 0.0000 1532.53 0.0000 100 7.60 0.00 0.00 0.0000 1532.53 0.0000

150 3.61 0.00 0.00 0.0000 943.04 0.0000 150 3.61 0.00 0.00 0.0000 943.04 0.0000

200 2.11 0.00 0.00 0.0000 647.01 0.0000 200 2.11 0.00 0.00 0.0000 647.01 0.0000

250 1.38 0.00 0.00 0.0000 477.16 0.0000 250 1.38 0.00 0.00 0.0000 477.16 0.0000

500 0.36 0.00 0.00 0.0000 180.51 0.0000 500 0.36 0.00 0.00 0.0000 180.51 0.0000

1000 0.10 0.00 0.00 0.0000 70.25 0.0000 1000 0.10 0.00 0.00 0.0000 70.25 0.0000

99% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.1492

Ann Rate [g/s]: 0.0074

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 74.17 1.10 0.47 0.0009 4985.68 0.0000 20 1.10 0.47 0.0009 0.0000

30 56.37 0.83 0.36 0.0007 4251.05 0.0000 30 0.83 0.36 0.0007 0.0000

40 36.41 0.54 0.23 0.0004 3540.67 0.0000 40 0.54 0.23 0.0004 0.0000

50 25.36 0.38 0.16 0.0003 3001.30 0.0000 50 0.38 0.16 0.0003 0.0000

60 18.66 0.28 0.12 0.0002 2575.36 0.0000 60 0.28 0.12 0.0002 0.0000

80 11.32 0.17 0.07 0.0001 1951.11 0.0000 80 0.17 0.07 0.0001 0.0000

100 7.60 0.11 0.05 0.0001 1532.53 0.0000 100 0.11 0.05 0.0001 0.0000

150 3.61 0.05 0.02 4.2E-05 943.04 0.0000 150 0.05 0.02 4.2E-05 0.0000

200 2.11 0.03 0.01 2.4E-05 647.01 0.0000 200 0.03 0.01 2.4E-05 0.0000

250 1.38 0.02 0.01 1.6E-05 477.16 0.0000 250 0.02 0.01 1.6E-05 0.0000

500 0.36 0.01 0.00 4.2E-06 180.51 0.0000 500 0.01 0.00 4.2E-06 0.0000

1000 0.10 0.00 0.00 1.1E-06 70.25 0.0000 1000 0.00 0.00 1.1E-06 0.0000

D-161
Averaged Multicomponent Health Impacts from Engine Degreasers for Facility G-02

Weightings: 1 24% Perc 41.0%

2 99% TCE 59.0%

Total Health Impacts

Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center Resident Worker Chronic Acute

20 1.28 0.54 0.0035 0.0072

30 0.97 0.41 0.0027 0.0062

40 0.63 0.27 0.0017 0.0051

50 0.44 0.19 0.0012 0.0044

60 0.32 0.14 0.0009 0.0037

80 0.19 0.08 0.0005 0.0028

100 0.13 0.06 0.0004 0.0022

150 0.06 0.03 0.0002 0.0014

200 0.04 0.02 0.0001 0.0009

250 0.02 0.01 0.0001 0.0007

500 0.01 0.00 1.7E-05 0.0003

1000 0.00 0.00 4.6E-06 1.0E-04

D-162
Facility G-03 - 47% Perc

Met Set: Averaged

47% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0708 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0035 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 16.68 0.34 0.15 0.0017 1231.74 0.0044 20 16.68 0.00 0.00 0.0000 1231.74 0.0000

30 33.45 0.69 0.29 0.0033 1650.82 0.0058 30 33.45 0.00 0.00 0.0000 1650.82 0.0000

40 27.02 0.56 0.24 0.0027 1484.02 0.0053 40 27.02 0.00 0.00 0.0000 1484.02 0.0000

50 25.03 0.52 0.22 0.0025 2079.26 0.0074 50 25.03 0.00 0.00 0.0000 2079.26 0.0000

60 20.90 0.43 0.18 0.0021 1915.91 0.0068 60 20.90 0.00 0.00 0.0000 1915.91 0.0000

80 12.23 0.25 0.11 0.0012 1479.75 0.0052 80 12.23 0.00 0.00 0.0000 1479.75 0.0000

100 8.02 0.17 0.07 0.0008 1184.75 0.0042 100 8.02 0.00 0.00 0.0000 1184.75 0.0000

150 3.71 0.08 0.03 0.0004 769.33 0.0027 150 3.71 0.00 0.00 0.0000 769.33 0.0000

200 2.14 0.04 0.02 0.0002 550.34 0.0019 200 2.14 0.00 0.00 0.0000 550.34 0.0000

250 1.39 0.03 0.01 0.0001 417.99 0.0015 250 1.39 0.00 0.00 0.0000 417.99 0.0000

500 0.36 0.01 0.00 3.6E-05 169.20 0.0006 500 0.36 0.00 0.00 0.0000 169.20 0.0000

1000 0.10 0.00 0.00 9.6E-06 68.13 0.0002 1000 0.10 0.00 0.00 0.0000 68.13 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 16.68 0.00 0.00 0.0000 1231.74 0.0000 20 0.34 0.15 0.0017 0.0044

30 33.45 0.00 0.00 0.0000 1650.82 0.0000 30 0.69 0.29 0.0033 0.0058

40 27.02 0.00 0.00 0.0000 1484.02 0.0000 40 0.56 0.24 0.0027 0.0053

50 25.03 0.00 0.00 0.0000 2079.26 0.0000 50 0.52 0.22 0.0025 0.0074

60 20.90 0.00 0.00 0.0000 1915.91 0.0000 60 0.43 0.18 0.0021 0.0068

80 12.23 0.00 0.00 0.0000 1479.75 0.0000 80 0.25 0.11 0.0012 0.0052

100 8.02 0.00 0.00 0.0000 1184.75 0.0000 100 0.17 0.07 0.0008 0.0042

150 3.71 0.00 0.00 0.0000 769.33 0.0000 150 0.08 0.03 0.0004 0.0027

200 2.14 0.00 0.00 0.0000 550.34 0.0000 200 0.04 0.02 0.0002 0.0019

250 1.39 0.00 0.00 0.0000 417.99 0.0000 250 0.03 0.01 0.0001 0.0015

500 0.36 0.00 0.00 0.0000 169.20 0.0000 500 0.01 0.00 3.6E-05 0.0006

1000 0.10 0.00 0.00 0.0000 68.13 0.0000 1000 0.00 0.00 9.6E-06 0.0002

D-163
Facility G-03 - 99% TCE

Met Set: Averaged

0% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 16.68 0.00 0.00 0.0000 1231.74 0.0000 20 16.68 0.00 0.00 0.0000 1231.74 0.0000

30 33.45 0.00 0.00 0.0000 1650.82 0.0000 30 33.45 0.00 0.00 0.0000 1650.82 0.0000

40 27.02 0.00 0.00 0.0000 1484.02 0.0000 40 27.02 0.00 0.00 0.0000 1484.02 0.0000

50 25.03 0.00 0.00 0.0000 2079.26 0.0000 50 25.03 0.00 0.00 0.0000 2079.26 0.0000

60 20.90 0.00 0.00 0.0000 1915.91 0.0000 60 20.90 0.00 0.00 0.0000 1915.91 0.0000

80 12.23 0.00 0.00 0.0000 1479.75 0.0000 80 12.23 0.00 0.00 0.0000 1479.75 0.0000

100 8.02 0.00 0.00 0.0000 1184.75 0.0000 100 8.02 0.00 0.00 0.0000 1184.75 0.0000

150 3.71 0.00 0.00 0.0000 769.33 0.0000 150 3.71 0.00 0.00 0.0000 769.33 0.0000

200 2.14 0.00 0.00 0.0000 550.34 0.0000 200 2.14 0.00 0.00 0.0000 550.34 0.0000

250 1.39 0.00 0.00 0.0000 417.99 0.0000 250 1.39 0.00 0.00 0.0000 417.99 0.0000

500 0.36 0.00 0.00 0.0000 169.20 0.0000 500 0.36 0.00 0.00 0.0000 169.20 0.0000

1000 0.10 0.00 0.00 0.0000 68.13 0.0000 1000 0.10 0.00 0.00 0.0000 68.13 0.0000

99% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.1492

Ann Rate [g/s]: 0.0074

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 16.68 0.25 0.11 0.0002 1231.74 0.0000 20 0.25 0.11 0.0002 0.0000

30 33.45 0.50 0.21 0.0004 1650.82 0.0000 30 0.50 0.21 0.0004 0.0000

40 27.02 0.40 0.17 0.0003 1484.02 0.0000 40 0.40 0.17 0.0003 0.0000

50 25.03 0.37 0.16 0.0003 2079.26 0.0000 50 0.37 0.16 0.0003 0.0000

60 20.90 0.31 0.13 0.0002 1915.91 0.0000 60 0.31 0.13 0.0002 0.0000

80 12.23 0.18 0.08 0.0001 1479.75 0.0000 80 0.18 0.08 0.0001 0.0000

100 8.02 0.12 0.05 0.0001 1184.75 0.0000 100 0.12 0.05 0.0001 0.0000

150 3.71 0.05 0.02 4.3E-05 769.33 0.0000 150 0.05 0.02 4.3E-05 0.0000

200 2.14 0.03 0.01 2.5E-05 550.34 0.0000 200 0.03 0.01 2.5E-05 0.0000

250 1.39 0.02 0.01 1.6E-05 417.99 0.0000 250 0.02 0.01 1.6E-05 0.0000

500 0.36 0.01 0.00 4.2E-06 169.20 0.0000 500 0.01 0.00 4.2E-06 0.0000

1000 0.10 0.00 0.00 1.1E-06 68.13 0.0000 1000 0.00 0.00 1.1E-06 0.0000

D-164
Averaged Multicomponent Health Impacts from Engine Degreasers for Facility G-03

Weightings: 1 24% Perc 41.0%

2 99% TCE 59.0%

Total Health Impacts

Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center Resident Worker Chronic Acute

20 0.29 0.12 0.0008 0.0018

30 0.58 0.24 0.0016 0.0024

40 0.46 0.20 0.0013 0.0022

50 0.43 0.18 0.0012 0.0030

60 0.36 0.15 0.0010 0.0028

80 0.21 0.09 0.0006 0.0021

100 0.14 0.06 0.0004 0.0017

150 0.06 0.03 0.0002 0.0011

200 0.04 0.02 0.0001 0.0008

250 0.02 0.01 0.0001 0.0006

500 0.01 0.00 0.0000 0.0002

1000 0.00 0.00 0.0000 0.0001

D-165
Risk Assessment Summary - 3 Generic Facilities

Multicomponent Impacts - Engine Degreasers - Default Met

Facility G-01 - 47% Perc

Met Set: Default-0

47% 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0708 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0035 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 307.03 6.34 2.70 0.0307 11342.73 0.0402 20 307.03 0.00 0.00 0.0000 11342.73 0.0000

30 229.98 4.75 2.02 0.0230 8496.33 0.0301 30 229.98 0.00 0.00 0.0000 8496.33 0.0000

40 178.09 3.68 1.57 0.0178 6579.11 0.0233 40 178.09 0.00 0.00 0.0000 6579.11 0.0000

50 141.80 2.93 1.25 0.0142 5238.72 0.0185 50 141.80 0.00 0.00 0.0000 5238.72 0.0000

60 115.56 2.39 1.02 0.0116 4269.33 0.0151 60 115.56 0.00 0.00 0.0000 4269.33 0.0000

80 81.09 1.67 0.71 0.0081 2995.85 0.0106 80 81.09 0.00 0.00 0.0000 2995.85 0.0000

100 60.18 1.24 0.53 0.0060 2223.11 0.0079 100 60.18 0.00 0.00 0.0000 2223.11 0.0000

150 33.55 0.69 0.29 0.0034 1239.31 0.0044 150 33.55 0.00 0.00 0.0000 1239.31 0.0000

200 21.63 0.45 0.19 0.0022 799.09 0.0028 200 21.63 0.00 0.00 0.0000 799.09 0.0000

250 15.25 0.32 0.13 0.0015 563.57 0.0020 250 15.25 0.00 0.00 0.0000 563.57 0.0000

500 5.08 0.10 0.04 0.0005 187.51 0.0007 500 5.08 0.00 0.00 0.0000 187.51 0.0000

1000 1.74 0.04 0.02 0.0002 64.26 0.0002 1000 1.74 0.00 0.00 0.0000 64.26 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 307.03 0.00 0.00 0.0000 11342.73 0.0000 20 6.34 2.70 0.0307 0.0402

30 229.98 0.00 0.00 0.0000 8496.33 0.0000 30 4.75 2.02 0.0230 0.0301

40 178.09 0.00 0.00 0.0000 6579.11 0.0000 40 3.68 1.57 0.0178 0.0233

50 141.80 0.00 0.00 0.0000 5238.72 0.0000 50 2.93 1.25 0.0142 0.0185

60 115.56 0.00 0.00 0.0000 4269.33 0.0000 60 2.39 1.02 0.0116 0.0151

80 81.09 0.00 0.00 0.0000 2995.85 0.0000 80 1.67 0.71 0.0081 0.0106

100 60.18 0.00 0.00 0.0000 2223.11 0.0000 100 1.24 0.53 0.0060 0.0079

150 33.55 0.00 0.00 0.0000 1239.31 0.0000 150 0.69 0.29 0.0034 0.0044

200 21.63 0.00 0.00 0.0000 799.09 0.0000 200 0.45 0.19 0.0022 0.0028

250 15.25 0.00 0.00 0.0000 563.57 0.0000 250 0.32 0.13 0.0015 0.0020

500 5.08 0.00 0.00 0.0000 187.51 0.0000 500 0.10 0.04 0.0005 0.0007

1000 1.74 0.00 0.00 0.0000 64.26 0.0000 1000 0.04 0.02 0.0002 0.0002

D-166
Facility G-01 - 99% TCE

Met Set: Default-0

0% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 307.03 0.00 0.00 0.0000 11342.73 0.0000 20 307.03 0.00 0.00 0.0000 11342.73 0.0000

30 229.98 0.00 0.00 0.0000 8496.33 0.0000 30 229.98 0.00 0.00 0.0000 8496.33 0.0000

40 178.09 0.00 0.00 0.0000 6579.11 0.0000 40 178.09 0.00 0.00 0.0000 6579.11 0.0000

50 141.80 0.00 0.00 0.0000 5238.72 0.0000 50 141.80 0.00 0.00 0.0000 5238.72 0.0000

60 115.56 0.00 0.00 0.0000 4269.33 0.0000 60 115.56 0.00 0.00 0.0000 4269.33 0.0000

80 81.09 0.00 0.00 0.0000 2995.85 0.0000 80 81.09 0.00 0.00 0.0000 2995.85 0.0000

100 60.18 0.00 0.00 0.0000 2223.11 0.0000 100 60.18 0.00 0.00 0.0000 2223.11 0.0000

150 33.55 0.00 0.00 0.0000 1239.31 0.0000 150 33.55 0.00 0.00 0.0000 1239.31 0.0000

200 21.63 0.00 0.00 0.0000 799.09 0.0000 200 21.63 0.00 0.00 0.0000 799.09 0.0000

250 15.25 0.00 0.00 0.0000 563.57 0.0000 250 15.25 0.00 0.00 0.0000 563.57 0.0000

500 5.08 0.00 0.00 0.0000 187.51 0.0000 500 5.08 0.00 0.00 0.0000 187.51 0.0000

1000 1.74 0.00 0.00 0.0000 64.26 0.0000 1000 1.74 0.00 0.00 0.0000 64.26 0.0000

99% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.1492

Ann Rate [g/s]: 0.0074

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 307.03 4.54 1.93 0.0036 11342.73 0.0000 20 4.54 1.93 0.0036 0.0000

30 229.98 3.40 1.45 0.0027 8496.33 0.0000 30 3.40 1.45 0.0027 0.0000

40 178.09 2.64 1.12 0.0021 6579.11 0.0000 40 2.64 1.12 0.0021 0.0000

50 141.80 2.10 0.89 0.0016 5238.72 0.0000 50 2.10 0.89 0.0016 0.0000

60 115.56 1.71 0.73 0.0013 4269.33 0.0000 60 1.71 0.73 0.0013 0.0000

80 81.09 1.20 0.51 0.0009 2995.85 0.0000 80 1.20 0.51 0.0009 0.0000

100 60.18 0.89 0.38 0.0007 2223.11 0.0000 100 0.89 0.38 0.0007 0.0000

150 33.55 0.50 0.21 0.0004 1239.31 0.0000 150 0.50 0.21 0.0004 0.0000

200 21.63 0.32 0.14 0.0003 799.09 0.0000 200 0.32 0.14 0.0003 0.0000

250 15.25 0.23 0.10 0.0002 563.57 0.0000 250 0.23 0.10 0.0002 0.0000

500 5.08 0.08 0.03 0.0001 187.51 0.0000 500 0.08 0.03 0.0001 0.0000

1000 1.74 0.03 0.01 2.0E-05 64.26 0.0000 1000 0.03 0.01 2.0E-05 0.0000

D-167
Averaged Multicomponent Health Impacts from Engine Degreasers for Facility G-01

Weightings: 1 47% Perc 41.0%

2 99% TCE 59.0%

Total Health Impacts

Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope Resident Worker Chronic Acute

20 5.28 2.25 0.0147 0.0165

30 3.96 1.68 0.0110 0.0123

40 3.06 1.30 0.0085 0.0095

50 2.44 1.04 0.0068 0.0076

60 1.99 0.85 0.0055 0.0062

80 1.39 0.59 0.0039 0.0043

100 1.03 0.44 0.0029 0.0032

150 0.58 0.25 0.0016 0.0018

200 0.37 0.16 0.0010 0.0012

250 0.26 0.11 0.0007 0.0008

500 0.09 0.04 0.0002 0.0003

1000 0.03 0.01 0.0001 0.0001

D-168
Facility G-02 - 47% Perc

Met Set: Default-0

47% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0708 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0035 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 142.83 2.95 1.26 0.0143 5276.51 0.0187 20 142.83 0.00 0.00 0.0000 5276.51 0.0000

30 117.98 2.44 1.04 0.0118 4358.64 0.0154 30 117.98 0.00 0.00 0.0000 4358.64 0.0000

40 98.78 2.04 0.87 0.0099 3649.09 0.0129 40 98.78 0.00 0.00 0.0000 3649.09 0.0000

50 83.77 1.73 0.74 0.0084 3094.79 0.0110 50 83.77 0.00 0.00 0.0000 3094.79 0.0000

60 71.89 1.48 0.63 0.0072 2656.01 0.0094 60 71.89 0.00 0.00 0.0000 2656.01 0.0000

80 54.62 1.13 0.48 0.0055 2017.7 0.0071 80 54.62 0.00 0.00 0.0000 2017.70 0.0000

100 42.94 0.89 0.38 0.0043 1586.22 0.0056 100 42.94 0.00 0.00 0.0000 1586.22 0.0000

150 26.25 0.54 0.23 0.0026 969.72 0.0034 150 26.25 0.00 0.00 0.0000 969.72 0.0000

200 17.86 0.37 0.16 0.0018 659.99 0.0023 200 17.86 0.00 0.00 0.0000 659.99 0.0000

250 13.05 0.27 0.11 0.0013 482.19 0.0017 250 13.05 0.00 0.00 0.0000 482.19 0.0000

500 4.69 0.10 0.04 0.0005 173.33 0.0006 500 4.69 0.00 0.00 0.0000 173.33 0.0000

1000 1.68 0.03 0.01 0.0002 61.9 0.0002 1000 1.68 0.00 0.00 0.0000 61.90 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 142.83 0.00 0.00 0.0000 5276.51 0.0000 20 2.95 1.26 0.0143 0.0187

30 117.98 0.00 0.00 0.0000 4358.64 0.0000 30 2.44 1.04 0.0118 0.0154

40 98.78 0.00 0.00 0.0000 3649.09 0.0000 40 2.04 0.87 0.0099 0.0129

50 83.77 0.00 0.00 0.0000 3094.79 0.0000 50 1.73 0.74 0.0084 0.0110

60 71.89 0.00 0.00 0.0000 2656.01 0.0000 60 1.48 0.63 0.0072 0.0094

80 54.62 0.00 0.00 0.0000 2017.70 0.0000 80 1.13 0.48 0.0055 0.0071

100 42.94 0.00 0.00 0.0000 1586.22 0.0000 100 0.89 0.38 0.0043 0.0056

150 26.25 0.00 0.00 0.0000 969.72 0.0000 150 0.54 0.23 0.0026 0.0034

200 17.86 0.00 0.00 0.0000 659.99 0.0000 200 0.37 0.16 0.0018 0.0023

250 13.05 0.00 0.00 0.0000 482.19 0.0000 250 0.27 0.11 0.0013 0.0017

500 4.69 0.00 0.00 0.0000 173.33 0.0000 500 0.10 0.04 0.0005 0.0006

1000 1.68 0.00 0.00 0.0000 61.90 0.0000 1000 0.03 0.01 0.0002 0.0002

D-169
Facility G-02 - 99% TCE

Met Set: Default-0

0% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 142.83 0.00 0.00 0.0000 5276.51 0.0000 20 142.83 0.00 0.00 0.0000 5276.51 0.0000

30 117.98 0.00 0.00 0.0000 4358.64 0.0000 30 117.98 0.00 0.00 0.0000 4358.64 0.0000

40 98.78 0.00 0.00 0.0000 3649.09 0.0000 40 98.78 0.00 0.00 0.0000 3649.09 0.0000

50 83.77 0.00 0.00 0.0000 3094.79 0.0000 50 83.77 0.00 0.00 0.0000 3094.79 0.0000

60 71.89 0.00 0.00 0.0000 2656.01 0.0000 60 71.89 0.00 0.00 0.0000 2656.01 0.0000

80 54.62 0.00 0.00 0.0000 2017.70 0.0000 80 54.62 0.00 0.00 0.0000 2017.70 0.0000

100 42.94 0.00 0.00 0.0000 1586.22 0.0000 100 42.94 0.00 0.00 0.0000 1586.22 0.0000

150 26.25 0.00 0.00 0.0000 969.72 0.0000 150 26.25 0.00 0.00 0.0000 969.72 0.0000

200 17.86 0.00 0.00 0.0000 659.99 0.0000 200 17.86 0.00 0.00 0.0000 659.99 0.0000

250 13.05 0.00 0.00 0.0000 482.19 0.0000 250 13.05 0.00 0.00 0.0000 482.19 0.0000

500 4.69 0.00 0.00 0.0000 173.33 0.0000 500 4.69 0.00 0.00 0.0000 173.33 0.0000

1000 1.68 0.00 0.00 0.0000 61.90 0.0000 1000 1.68 0.00 0.00 0.0000 61.90 0.0000

99% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.1492

Ann Rate [g/s]: 0.0074

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 142.83 2.11 0.90 0.0017 5276.51 0.0000 20 2.11 0.90 0.0017 0.0000

30 117.98 1.75 0.74 0.0014 4358.64 0.0000 30 1.75 0.74 0.0014 0.0000

40 98.78 1.46 0.62 0.0011 3649.09 0.0000 40 1.46 0.62 0.0011 0.0000

50 83.77 1.24 0.53 0.0010 3094.79 0.0000 50 1.24 0.53 0.0010 0.0000

60 71.89 1.06 0.45 0.0008 2656.01 0.0000 60 1.06 0.45 0.0008 0.0000

80 54.62 0.81 0.34 0.0006 2017.70 0.0000 80 0.81 0.34 0.0006 0.0000

100 42.94 0.64 0.27 0.0005 1586.22 0.0000 100 0.64 0.27 0.0005 0.0000

150 26.25 0.39 0.17 0.0003 969.72 0.0000 150 0.39 0.17 0.0003 0.0000

200 17.86 0.26 0.11 0.0002 659.99 0.0000 200 0.26 0.11 0.0002 0.0000

250 13.05 0.19 0.08 0.0002 482.19 0.0000 250 0.19 0.08 0.0002 0.0000

500 4.69 0.07 0.03 0.0001 173.33 0.0000 500 0.07 0.03 0.0001 0.0000

1000 1.68 0.02 0.01 1.9E-05 61.90 0.0000 1000 0.02 0.01 1.9E-05 0.0000

D-170
Averaged Multicomponent Health Impacts from Engine Degreasers for Facility G-02

Weightings: 1 24% Perc 41.0%

2 99% TCE 59.0%

Total Health Impacts

Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope Resident Worker Chronic Acute

20 2.46 1.05 0.0068 0.0077

30 2.03 0.86 0.0056 0.0063

40 1.70 0.72 0.0047 0.0053

50 1.44 0.61 0.0040 0.0045

60 1.24 0.53 0.0034 0.0039

80 0.94 0.40 0.0026 0.0029

100 0.74 0.31 0.0021 0.0023

150 0.45 0.19 0.0013 0.0014

200 0.31 0.13 0.0009 0.0010

250 0.22 0.10 0.0006 0.0007

500 0.08 0.03 0.0002 0.0003

1000 0.03 0.01 0.0001 0.0001

D-171
Facility G-03 - 47% Perc

Met Set: Default-0

47% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0708 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0035 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.30 1.53 0.65 0.0074 2744.96 0.0097 20 74.30 0.00 0.00 0.0000 2744.96 0.0000

30 64.57 1.33 0.57 0.0065 2385.45 0.0084 30 64.57 0.00 0.00 0.0000 2385.45 0.0000

40 56.52 1.17 0.50 0.0057 2088.05 0.0074 40 56.52 0.00 0.00 0.0000 2088.05 0.0000

50 49.84 1.03 0.44 0.0050 1841.4 0.0065 50 49.84 0.00 0.00 0.0000 1841.40 0.0000

60 44.27 0.91 0.39 0.0044 1635.59 0.0058 60 44.27 0.00 0.00 0.0000 1635.59 0.0000

80 35.62 0.74 0.31 0.0036 1315.96 0.0047 80 35.62 0.00 0.00 0.0000 1315.96 0.0000

100 29.32 0.61 0.26 0.0029 1083.1 0.0038 100 29.32 0.00 0.00 0.0000 1083.10 0.0000

150 19.45 0.40 0.17 0.0019 718.69 0.0025 150 19.45 0.00 0.00 0.0000 718.69 0.0000

200 13.97 0.29 0.12 0.0014 516.25 0.0018 200 13.97 0.00 0.00 0.0000 516.25 0.0000

250 10.61 0.22 0.09 0.0011 391.81 0.0014 250 10.61 0.00 0.00 0.0000 391.81 0.0000

500 4.18 0.09 0.04 0.0004 154.56 0.0005 500 4.18 0.00 0.00 0.0000 154.56 0.0000

1000 1.58 0.03 0.01 0.0002 58.4 0.0002 1000 1.58 0.00 0.00 0.0000 58.40 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 74.30 0.00 0.00 0.0000 2744.96 0.0000 20 1.53 0.65 0.0074 0.0097

30 64.57 0.00 0.00 0.0000 2385.45 0.0000 30 1.33 0.57 0.0065 0.0084

40 56.52 0.00 0.00 0.0000 2088.05 0.0000 40 1.17 0.50 0.0057 0.0074

50 49.84 0.00 0.00 0.0000 1841.40 0.0000 50 1.03 0.44 0.0050 0.0065

60 44.27 0.00 0.00 0.0000 1635.59 0.0000 60 0.91 0.39 0.0044 0.0058

80 35.62 0.00 0.00 0.0000 1315.96 0.0000 80 0.74 0.31 0.0036 0.0047

100 29.32 0.00 0.00 0.0000 1083.10 0.0000 100 0.61 0.26 0.0029 0.0038

150 19.45 0.00 0.00 0.0000 718.69 0.0000 150 0.40 0.17 0.0019 0.0025

200 13.97 0.00 0.00 0.0000 516.25 0.0000 200 0.29 0.12 0.0014 0.0018

250 10.61 0.00 0.00 0.0000 391.81 0.0000 250 0.22 0.09 0.0011 0.0014

500 4.18 0.00 0.00 0.0000 154.56 0.0000 500 0.09 0.04 0.0004 0.0005

1000 1.58 0.00 0.00 0.0000 58.40 0.0000 1000 0.03 0.01 0.0002 0.0002

D-172
Facility G-03 - 99% TCE

Met Set: Default-0

0% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.30 0.00 0.00 0.0000 2744.96 0.0000 20 74.30 0.00 0.00 0.0000 2744.96 0.0000

30 64.57 0.00 0.00 0.0000 2385.45 0.0000 30 64.57 0.00 0.00 0.0000 2385.45 0.0000

40 56.52 0.00 0.00 0.0000 2088.05 0.0000 40 56.52 0.00 0.00 0.0000 2088.05 0.0000

50 49.84 0.00 0.00 0.0000 1841.40 0.0000 50 49.84 0.00 0.00 0.0000 1841.40 0.0000

60 44.27 0.00 0.00 0.0000 1635.59 0.0000 60 44.27 0.00 0.00 0.0000 1635.59 0.0000

80 35.62 0.00 0.00 0.0000 1315.96 0.0000 80 35.62 0.00 0.00 0.0000 1315.96 0.0000

100 29.32 0.00 0.00 0.0000 1083.10 0.0000 100 29.32 0.00 0.00 0.0000 1083.10 0.0000

150 19.45 0.00 0.00 0.0000 718.69 0.0000 150 19.45 0.00 0.00 0.0000 718.69 0.0000

200 13.97 0.00 0.00 0.0000 516.25 0.0000 200 13.97 0.00 0.00 0.0000 516.25 0.0000

250 10.61 0.00 0.00 0.0000 391.81 0.0000 250 10.61 0.00 0.00 0.0000 391.81 0.0000

500 4.18 0.00 0.00 0.0000 154.56 0.0000 500 4.18 0.00 0.00 0.0000 154.56 0.0000

1000 1.58 0.00 0.00 0.0000 58.40 0.0000 1000 1.58 0.00 0.00 0.0000 58.40 0.0000

99% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.1492

Ann Rate [g/s]: 0.0074

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 74.30 1.10 0.47 0.0009 2744.96 0.0000 20 1.10 0.47 0.0009 0.0000

30 64.57 0.96 0.41 0.0007 2385.45 0.0000 30 0.96 0.41 0.0007 0.0000

40 56.52 0.84 0.36 0.0007 2088.05 0.0000 40 0.84 0.36 0.0007 0.0000

50 49.84 0.74 0.31 0.0006 1841.40 0.0000 50 0.74 0.31 0.0006 0.0000

60 44.27 0.66 0.28 0.0005 1635.59 0.0000 60 0.66 0.28 0.0005 0.0000

80 35.62 0.53 0.22 0.0004 1315.96 0.0000 80 0.53 0.22 0.0004 0.0000

100 29.32 0.43 0.18 0.0003 1083.10 0.0000 100 0.43 0.18 0.0003 0.0000

150 19.45 0.29 0.12 0.0002 718.69 0.0000 150 0.29 0.12 0.0002 0.0000

200 13.97 0.21 0.09 0.0002 516.25 0.0000 200 0.21 0.09 0.0002 0.0000

250 10.61 0.16 0.07 0.0001 391.81 0.0000 250 0.16 0.07 0.0001 0.0000

500 4.18 0.06 0.03 4.8E-05 154.56 0.0000 500 0.06 0.03 4.8E-05 0.0000

1000 1.58 0.02 0.01 1.8E-05 58.40 0.0000 1000 0.02 0.01 1.8E-05 0.0000

D-173
Averaged Multicomponent Health Impacts from Engine Degreasers for Facility G-03

Weightings: 1 24% Perc 41.0%

2 99% TCE 59.0%

Total Health Impacts

Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope Resident Worker Chronic Acute

20 1.28 0.54 0.0036 0.0040

30 1.11 0.47 0.0031 0.0035

40 0.97 0.41 0.0027 0.0030

50 0.86 0.36 0.0024 0.0027

60 0.76 0.32 0.0021 0.0024

80 0.61 0.26 0.0017 0.0019

100 0.50 0.21 0.0014 0.0016

150 0.33 0.14 0.0009 0.0010

200 0.24 0.10 0.0007 0.0007

250 0.18 0.08 0.0005 0.0006

500 0.07 0.03 0.0002 0.0002

1000 0.03 0.01 0.0001 0.0001

D-174
Risk Assessment Summary - 3 Generic Facilities

Multicomponent Impacts - General Degreasers - Average of 10 Met Sets

Facility G-01 - 24% Perc

Met Set: Averaged

24% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0151 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0016 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 127.54 1.20 0.51 0.0058 10938.41 0.0083 20 127.54 0.00 0.00 0.0000 10938.41 0.0000

30 67.72 0.64 0.27 0.0031 8158.81 0.0062 30 67.72 0.00 0.00 0.0000 8158.81 0.0000

40 41.93 0.40 0.17 0.0019 6322.28 0.0048 40 41.93 0.00 0.00 0.0000 6322.28 0.0000

50 28.51 0.27 0.11 0.0013 5024.56 0.0038 50 28.51 0.00 0.00 0.0000 5024.56 0.0000

60 20.66 0.19 0.08 0.0009 4082.78 0.0031 60 20.66 0.00 0.00 0.0000 4082.78 0.0000

80 12.27 0.12 0.05 0.0006 2846.71 0.0021 80 12.27 0.00 0.00 0.0000 2846.71 0.0000

100 8.12 0.08 0.03 0.0004 2100.30 0.0016 100 8.12 0.00 0.00 0.0000 2100.30 0.0000

150 3.78 0.04 0.02 0.0002 1171.11 0.0009 150 3.78 0.00 0.00 0.0000 1171.11 0.0000

200 2.18 0.02 0.01 0.0001 763.65 0.0006 200 2.18 0.00 0.00 0.0000 763.65 0.0000

250 1.42 0.01 0.01 0.0001 545.14 0.0004 250 1.42 0.00 0.00 0.0000 545.14 0.0000

500 0.37 0.00 0.00 1.7E-05 192.37 0.0001 500 0.37 0.00 0.00 0.0000 192.37 0.0000

1000 0.10 0.00 0.00 4.4E-06 72.27 5.5E-05 1000 0.10 0.00 0.00 0.0000 72.27 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 127.54 0.00 0.00 0.0000 10938.41 0.0000 20 1.20 0.51 0.0058 0.0083

30 67.72 0.00 0.00 0.0000 8158.81 0.0000 30 0.64 0.27 0.0031 0.0062

40 41.93 0.00 0.00 0.0000 6322.28 0.0000 40 0.40 0.17 0.0019 0.0048

50 28.51 0.00 0.00 0.0000 5024.56 0.0000 50 0.27 0.11 0.0013 0.0038

60 20.66 0.00 0.00 0.0000 4082.78 0.0000 60 0.19 0.08 0.0009 0.0031

80 12.27 0.00 0.00 0.0000 2846.71 0.0000 80 0.12 0.05 0.0006 0.0021

100 8.12 0.00 0.00 0.0000 2100.30 0.0000 100 0.08 0.03 0.0004 0.0016

150 3.78 0.00 0.00 0.0000 1171.11 0.0000 150 0.04 0.02 0.0002 0.0009

200 2.18 0.00 0.00 0.0000 763.65 0.0000 200 0.02 0.01 0.0001 0.0006

250 1.42 0.00 0.00 0.0000 545.14 0.0000 250 0.01 0.01 0.0001 0.0004

500 0.37 0.00 0.00 0.0000 192.37 0.0000 500 0.00 0.00 1.7E-05 0.0001

1000 0.10 0.00 0.00 0.0000 72.27 0.0000 1000 0.00 0.00 4.4E-06 5.5E-05

D-175
Facility G-01 - 41% Perc, 55% MeCl

Met Set: Averaged

41% Perc 55% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0259 op hrs/wk: 57 Acu Rate [g/s]: 0.0347

Ann Rate [g/s]: 0.0027 Ann Rate [g/s]: 0.0036

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 127.54 2.03 0.86 0.0098 10938.41 0.0142 20 127.54 0.46 0.20 0.0011 10938.41 0.0271

30 67.72 1.08 0.46 0.0052 8158.81 0.0106 30 67.72 0.24 0.10 0.0006 8158.81 0.0202

40 41.93 0.67 0.28 0.0032 6322.28 0.0082 40 41.93 0.15 0.06 0.0004 6322.28 0.0157

50 28.51 0.45 0.19 0.0022 5024.56 0.0065 50 28.51 0.10 0.04 0.0003 5024.56 0.0125

60 20.66 0.33 0.14 0.0016 4082.78 0.0053 60 20.66 0.07 0.03 0.0002 4082.78 0.0101

80 12.27 0.20 0.08 0.0009 2846.71 0.0037 80 12.27 0.04 0.02 0.0001 2846.71 0.0071

100 8.12 0.13 0.06 0.0006 2100.30 0.0027 100 8.12 0.03 0.01 0.0001 2100.30 0.0052

150 3.78 0.06 0.03 0.0003 1171.11 0.0015 150 3.78 0.01 0.01 3.41E-05 1171.11 0.0029

200 2.18 0.03 0.01 1.7E-04 763.65 0.0010 200 2.18 0.01 0.00 1.96E-05 763.65 0.0019

250 1.42 0.02 0.01 1.1E-04 545.14 0.0007 250 1.42 0.01 0.00 1.28E-05 545.14 0.0014

500 0.37 0.01 0.00 2.8E-05 192.37 2.5E-04 500 0.37 0.00 0.00 3.31E-06 192.37 0.0005

1000 0.10 0.00 0.00 7.4E-06 72.27 9.4E-05 1000 0.10 0.00 0.00 8.64E-07 72.27 0.0002

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 127.54 0.00 0.00 0.0000 10938.41 0.0000 20 2.49 1.06 0.0110 0.0413

30 67.72 0.00 0.00 0.0000 8158.81 0.0000 30 1.32 0.56 0.0058 0.0308

40 41.93 0.00 0.00 0.0000 6322.28 0.0000 40 0.82 0.35 0.0036 0.0239

50 28.51 0.00 0.00 0.0000 5024.56 0.0000 50 0.56 0.24 0.0025 0.0190

60 20.66 0.00 0.00 0.0000 4082.78 0.0000 60 0.40 0.17 0.0018 0.0154

80 12.27 0.00 0.00 0.0000 2846.71 0.0000 80 0.24 0.10 0.0011 0.0107

100 8.12 0.00 0.00 0.0000 2100.30 0.0000 100 0.16 0.07 0.0007 0.0079

150 3.78 0.00 0.00 0.0000 1171.11 0.0000 150 0.07 0.03 0.0003 0.0044

200 2.18 0.00 0.00 0.0000 763.65 0.0000 200 0.04 0.02 0.0002 0.0029

250 1.42 0.00 0.00 0.0000 545.14 0.0000 250 0.03 0.01 1.2E-04 0.0021

500 0.37 0.00 0.00 0.0000 192.37 0.0000 500 0.01 0.00 3.2E-05 7.3E-04

1000 0.10 0.00 0.00 0.0000 72.27 0.0000 1000 0.00 0.00 8.3E-06 2.7E-04

D-176
Facility G-01 - 46% MeCl

Met Set: Averaged

0% Perc 46% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0.0290

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0.0030

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 127.54 0.00 0.00 0.0000 10938.41 0.0000 20 127.54 0.38 0.16 0.0001 10938.41 0.0227

30 67.72 0.00 0.00 0.0000 8158.81 0.0000 30 67.72 0.20 0.09 0.0001 8158.81 0.0169

40 41.93 0.00 0.00 0.0000 6322.28 0.0000 40 41.93 0.13 0.05 4.2E-05 6322.28 0.0131

50 28.51 0.00 0.00 0.0000 5024.56 0.0000 50 28.51 0.09 0.04 2.9E-05 5024.56 0.0104

60 20.66 0.00 0.00 0.0000 4082.78 0.0000 60 20.66 0.06 0.03 2.1E-05 4082.78 0.0085

80 12.27 0.00 0.00 0.0000 2846.71 0.0000 80 12.27 0.04 0.02 1.2E-05 2846.71 0.0059

100 8.12 0.00 0.00 0.0000 2100.30 0.0000 100 8.12 0.02 0.01 8.1E-06 2100.30 0.0044

150 3.78 0.00 0.00 0.0000 1171.11 0.0000 150 3.78 0.01 0.00 3.8E-06 1171.11 0.0024

200 2.18 0.00 0.00 0.0000 763.65 0.0000 200 2.18 0.01 0.00 2.2E-06 763.65 0.0016

250 1.42 0.00 0.00 0.0000 545.14 0.0000 250 1.42 0.00 0.00 1.4E-06 545.14 0.0011

500 0.37 0.00 0.00 0.0000 192.37 0.0000 500 0.37 0.00 0.00 3.7E-07 192.37 0.0004

1000 0.10 0.00 0.00 0.0000 72.27 0.0000 1000 0.10 0.00 0.00 9.6E-08 72.27 0.0001

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 127.54 0.00 0.00 0.0000 10938.41 0.0000 20 0.38 0.16 0.0001 0.0227

30 67.72 0.00 0.00 0.0000 8158.81 0.0000 30 0.20 0.09 0.0001 0.0169

40 41.93 0.00 0.00 0.0000 6322.28 0.0000 40 0.13 0.05 4.2E-05 0.0131

50 28.51 0.00 0.00 0.0000 5024.56 0.0000 50 0.09 0.04 2.9E-05 0.0104

60 20.66 0.00 0.00 0.0000 4082.78 0.0000 60 0.06 0.03 2.1E-05 0.0085

80 12.27 0.00 0.00 0.0000 2846.71 0.0000 80 0.04 0.02 1.2E-05 0.0059

100 8.12 0.00 0.00 0.0000 2100.30 0.0000 100 0.02 0.01 8.1E-06 0.0044

150 3.78 0.00 0.00 0.0000 1171.11 0.0000 150 0.01 0.00 3.8E-06 0.0024

200 2.18 0.00 0.00 0.0000 763.65 0.0000 200 0.01 0.00 2.2E-06 0.0016

250 1.42 0.00 0.00 0.0000 545.14 0.0000 250 0.00 0.00 1.4E-06 0.0011

500 0.37 0.00 0.00 0.0000 192.37 0.0000 500 0.00 0.00 3.7E-07 0.0004

1000 0.10 0.00 0.00 0.0000 72.27 0.0000 1000 0.00 0.00 9.6E-08 0.0001

D-177
Facility G-01 - 97% TCE

Met Set: Averaged

0% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 127.54 0.00 0.00 0.0000 10938.41 0.0000 20 127.54 0.00 0.00 0.0000 10938.41 0.0000

30 67.72 0.00 0.00 0.0000 8158.81 0.0000 30 67.72 0.00 0.00 0.0000 8158.81 0.0000

40 41.93 0.00 0.00 0.0000 6322.28 0.0000 40 41.93 0.00 0.00 0.0000 6322.28 0.0000

50 28.51 0.00 0.00 0.0000 5024.56 0.0000 50 28.51 0.00 0.00 0.0000 5024.56 0.0000

60 20.66 0.00 0.00 0.0000 4082.78 0.0000 60 20.66 0.00 0.00 0.0000 4082.78 0.0000

80 12.27 0.00 0.00 0.0000 2846.71 0.0000 80 12.27 0.00 0.00 0.0000 2846.71 0.0000

100 8.12 0.00 0.00 0.0000 2100.30 0.0000 100 8.12 0.00 0.00 0.0000 2100.30 0.0000

150 3.78 0.00 0.00 0.0000 1171.11 0.0000 150 3.78 0.00 0.00 0.0000 1171.11 0.0000

200 2.18 0.00 0.00 0.0000 763.65 0.0000 200 2.18 0.00 0.00 0.0000 763.65 0.0000

250 1.42 0.00 0.00 0.0000 545.14 0.0000 250 1.42 0.00 0.00 0.0000 545.14 0.0000

500 0.37 0.00 0.00 0.0000 192.37 0.0000 500 0.37 0.00 0.00 0.0000 192.37 0.0000

1000 0.10 0.00 0.00 0.0000 72.27 0.0000 1000 0.10 0.00 0.00 0.0000 72.27 0.0000

97% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0612

Ann Rate [g/s]: 0.0064

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 127.54 1.63 0.69 0.0013 10938.41 0.0000 20 1.63 0.69 0.0013 0.0000

30 67.72 0.87 0.37 0.0007 8158.81 0.0000 30 0.87 0.37 0.0007 0.0000

40 41.93 0.54 0.23 0.0004 6322.28 0.0000 40 0.54 0.23 0.0004 0.0000

50 28.51 0.36 0.16 0.0003 5024.56 0.0000 50 0.36 0.16 0.0003 0.0000

60 20.66 0.26 0.11 0.0002 4082.78 0.0000 60 0.26 0.11 0.0002 0.0000

80 12.27 0.16 0.07 0.0001 2846.71 0.0000 80 0.16 0.07 0.0001 0.0000

100 8.12 0.10 0.04 0.0001 2100.30 0.0000 100 0.10 0.04 0.0001 0.0000

150 3.78 0.05 0.02 3.8E-05 1171.11 0.0000 150 0.05 0.02 3.8E-05 0.0000

200 2.18 0.03 0.01 2.2E-05 763.65 0.0000 200 0.03 0.01 2.2E-05 0.0000

250 1.42 0.02 0.01 1.4E-05 545.14 0.0000 250 0.02 0.01 1.4E-05 0.0000

500 0.37 0.00 0.00 3.7E-06 192.37 0.0000 500 0.00 0.00 3.7E-06 0.0000

1000 0.10 0.00 0.00 9.6E-07 72.27 0.0000 1000 0.00 0.00 9.6E-07 0.0000

D-178
Averaged Multicomponent Health Impacts from General Degreasers for Facility G-01

Weightings: 1 24% Perc 5.3%

2 41% Perc/55% MeCl 1.1%

3 46% MeCl 7.2%

4 97% TCE 86.0%

Total Health Impacts

Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center Resident Worker Chronic Acute

20 1.52 0.65 0.0015 0.0025

30 0.81 0.34 0.0008 0.0019

40 0.50 0.21 0.0005 0.0015

50 0.34 0.14 0.0003 0.0012

60 0.25 0.10 0.0002 0.0009

80 0.15 0.06 0.0001 0.0007

100 0.10 0.04 0.0001 0.0005

150 0.05 0.02 0.0000 0.0003

200 0.03 0.01 2.6E-05 0.0002

250 0.02 0.01 1.7E-05 0.0001

500 0.00 0.00 4.4E-06 4.4E-05

1000 0.00 0.00 1.2E-06 1.7E-05

D-179
Facility G-02 - 24% Perc

Met Set: Averaged

24% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0151 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0016 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.17 0.70 0.30 0.0034 4985.68 0.0038 20 74.17 0.00 0.00 0.0000 4985.68 0.0000

30 56.37 0.53 0.23 0.0026 4251.05 0.0032 30 56.37 0.00 0.00 0.0000 4251.05 0.0000

40 36.41 0.34 0.15 0.0017 3540.67 0.0027 40 36.41 0.00 0.00 0.0000 3540.67 0.0000

50 25.36 0.24 0.10 0.0012 3001.30 0.0023 50 25.36 0.00 0.00 0.0000 3001.30 0.0000

60 18.66 0.18 0.07 0.0009 2575.36 0.0019 60 18.66 0.00 0.00 0.0000 2575.36 0.0000

80 11.32 0.11 0.05 0.0005 1951.11 0.0015 80 11.32 0.00 0.00 0.0000 1951.11 0.0000

100 7.60 0.07 0.03 0.0003 1532.53 0.0012 100 7.60 0.00 0.00 0.0000 1532.53 0.0000

150 3.61 0.03 0.01 0.0002 943.04 0.0007 150 3.61 0.00 0.00 0.0000 943.04 0.0000

200 2.11 0.02 0.01 0.0001 647.01 0.0005 200 2.11 0.00 0.00 0.0000 647.01 0.0000

250 1.38 0.01 0.01 0.0001 477.16 0.0004 250 1.38 0.00 0.00 0.0000 477.16 0.0000

500 0.36 0.00 0.00 1.7E-05 180.51 0.0001 500 0.36 0.00 0.00 0.0000 180.51 0.0000

1000 0.10 0.00 0.00 4.4E-06 70.25 5.3E-05 1000 0.10 0.00 0.00 0.0000 70.25 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 74.17 0.00 0.00 0.0000 4985.68 0.0000 20 0.70 0.30 0.0034 0.0038

30 56.37 0.00 0.00 0.0000 4251.05 0.0000 30 0.53 0.23 0.0026 0.0032

40 36.41 0.00 0.00 0.0000 3540.67 0.0000 40 0.34 0.15 0.0017 0.0027

50 25.36 0.00 0.00 0.0000 3001.30 0.0000 50 0.24 0.10 0.0012 0.0023

60 18.66 0.00 0.00 0.0000 2575.36 0.0000 60 0.18 0.07 0.0009 0.0019

80 11.32 0.00 0.00 0.0000 1951.11 0.0000 80 0.11 0.05 0.0005 0.0015

100 7.60 0.00 0.00 0.0000 1532.53 0.0000 100 0.07 0.03 0.0003 0.0012

150 3.61 0.00 0.00 0.0000 943.04 0.0000 150 0.03 0.01 0.0002 0.0007

200 2.11 0.00 0.00 0.0000 647.01 0.0000 200 0.02 0.01 0.0001 0.0005

250 1.38 0.00 0.00 0.0000 477.16 0.0000 250 0.01 0.01 0.0001 0.0004

500 0.36 0.00 0.00 0.0000 180.51 0.0000 500 0.00 0.00 1.7E-05 0.0001

1000 0.10 0.00 0.00 0.0000 70.25 0.0000 1000 0.00 0.00 4.4E-06 5.3E-05

D-180
Facility G-02 - 41% Perc, 55% MeCl

Met Set: Averaged

41% Perc 55% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0259 op hrs/wk: 57 Acu Rate [g/s]: 0.0347

Ann Rate [g/s]: 0.0027 Ann Rate [g/s]: 0.0036

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.17 1.18 0.50 0.0057 4985.68 0.0065 20 74.17 0.27 0.11 0.0007 4985.68 0.0124

30 56.37 0.90 0.38 0.0043 4251.05 0.0055 30 56.37 0.20 0.09 0.0005 4251.05 0.0105

40 36.41 0.58 0.25 0.0028 3540.67 0.0046 40 36.41 0.13 0.06 0.0003 3540.67 0.0088

50 25.36 0.40 0.17 0.0020 3001.30 0.0039 50 25.36 0.09 0.04 0.0002 3001.30 0.0074

60 18.66 0.30 0.13 0.0014 2575.36 0.0033 60 18.66 0.07 0.03 0.0002 2575.36 0.0064

80 11.32 0.18 0.08 0.0009 1951.11 0.0025 80 11.32 0.04 0.02 0.0001 1951.11 0.0048

100 7.60 0.12 0.05 0.0006 1532.53 0.0020 100 7.60 0.03 0.01 0.0001 1532.53 0.0038

150 3.61 0.06 0.02 0.0003 943.04 0.0012 150 3.61 0.01 0.01 3.3E-05 943.04 0.0023

200 2.11 0.03 0.01 1.6E-04 647.01 0.0008 200 2.11 0.01 0.00 1.9E-05 647.01 0.0016

250 1.38 0.02 0.01 1.1E-04 477.16 0.0006 250 1.38 0.00 0.00 1.2E-05 477.16 0.0012

500 0.36 0.01 0.00 2.8E-05 180.51 2.3E-04 500 0.36 0.00 0.00 3.3E-06 180.51 0.0004

1000 0.10 0.00 0.00 7.4E-06 70.25 9.1E-05 1000 0.10 0.00 0.00 8.6E-07 70.25 0.0002

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 74.17 0.00 0.00 0.0000 4985.68 0.0000 20 1.45 0.62 0.0064 0.0188

30 56.37 0.00 0.00 0.0000 4251.05 0.0000 30 1.10 0.47 0.0049 0.0160

40 36.41 0.00 0.00 0.0000 3540.67 0.0000 40 0.71 0.30 0.0031 0.0134

50 25.36 0.00 0.00 0.0000 3001.30 0.0000 50 0.50 0.21 0.0022 0.0113

60 18.66 0.00 0.00 0.0000 2575.36 0.0000 60 0.36 0.16 0.0016 0.0097

80 11.32 0.00 0.00 0.0000 1951.11 0.0000 80 0.22 0.09 0.0010 0.0074

100 7.60 0.00 0.00 0.0000 1532.53 0.0000 100 0.15 0.06 0.0007 0.0058

150 3.61 0.00 0.00 0.0000 943.04 0.0000 150 0.07 0.03 0.0003 0.0036

200 2.11 0.00 0.00 0.0000 647.01 0.0000 200 0.04 0.02 0.0002 0.0024

250 1.38 0.00 0.00 0.0000 477.16 0.0000 250 0.03 0.01 1.2E-04 0.0018

500 0.36 0.00 0.00 0.0000 180.51 0.0000 500 0.01 0.00 3.1E-05 6.8E-04

1000 0.10 0.00 0.00 0.0000 70.25 0.0000 1000 0.00 0.00 8.3E-06 2.7E-04

D-181
Facility G-02 - 46% MeCl

Met Set: Averaged

0% Perc 46% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0.0290

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0.0030

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.17 0.00 0.00 0.0000 4985.68 0.0000 20 74.17 0.22 0.09 0.0001 4985.68 0.0103

30 56.37 0.00 0.00 0.0000 4251.05 0.0000 30 56.37 0.17 0.07 0.0001 4251.05 0.0088

40 36.41 0.00 0.00 0.0000 3540.67 0.0000 40 36.41 0.11 0.05 3.6E-05 3540.67 0.0073

50 25.36 0.00 0.00 0.0000 3001.30 0.0000 50 25.36 0.08 0.03 2.5E-05 3001.30 0.0062

60 18.66 0.00 0.00 0.0000 2575.36 0.0000 60 18.66 0.06 0.02 1.9E-05 2575.36 0.0053

80 11.32 0.00 0.00 0.0000 1951.11 0.0000 80 11.32 0.03 0.01 1.1E-05 1951.11 0.0040

100 7.60 0.00 0.00 0.0000 1532.53 0.0000 100 7.60 0.02 0.01 7.6E-06 1532.53 0.0032

150 3.61 0.00 0.00 0.0000 943.04 0.0000 150 3.61 0.01 0.00 3.6E-06 943.04 0.0020

200 2.11 0.00 0.00 0.0000 647.01 0.0000 200 2.11 0.01 0.00 2.1E-06 647.01 0.0013

250 1.38 0.00 0.00 0.0000 477.16 0.0000 250 1.38 0.00 0.00 1.4E-06 477.16 0.0010

500 0.36 0.00 0.00 0.0000 180.51 0.0000 500 0.36 0.00 0.00 3.6E-07 180.51 0.0004

1000 0.10 0.00 0.00 0.0000 70.25 0.0000 1000 0.10 0.00 0.00 9.6E-08 70.25 0.0001

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 74.17 0.00 0.00 0.0000 4985.68 0.0000 20 0.22 0.09 0.0001 0.0103

30 56.37 0.00 0.00 0.0000 4251.05 0.0000 30 0.17 0.07 0.0001 0.0088

40 36.41 0.00 0.00 0.0000 3540.67 0.0000 40 0.11 0.05 3.6E-05 0.0073

50 25.36 0.00 0.00 0.0000 3001.30 0.0000 50 0.08 0.03 2.5E-05 0.0062

60 18.66 0.00 0.00 0.0000 2575.36 0.0000 60 0.06 0.02 1.9E-05 0.0053

80 11.32 0.00 0.00 0.0000 1951.11 0.0000 80 0.03 0.01 1.1E-05 0.0040

100 7.60 0.00 0.00 0.0000 1532.53 0.0000 100 0.02 0.01 7.6E-06 0.0032

150 3.61 0.00 0.00 0.0000 943.04 0.0000 150 0.01 0.00 3.6E-06 0.0020

200 2.11 0.00 0.00 0.0000 647.01 0.0000 200 0.01 0.00 2.1E-06 0.0013

250 1.38 0.00 0.00 0.0000 477.16 0.0000 250 0.00 0.00 1.4E-06 0.0010

500 0.36 0.00 0.00 0.0000 180.51 0.0000 500 0.00 0.00 3.6E-07 0.0004

1000 0.10 0.00 0.00 0.0000 70.25 0.0000 1000 0.00 0.00 9.6E-08 0.0001

D-182
Facility G-02 - 97% TCE

Met Set: Averaged

0% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.17 0.00 0.00 0.0000 4985.68 0.0000 20 74.17 0.00 0.00 0.0000 4985.68 0.0000

30 56.37 0.00 0.00 0.0000 4251.05 0.0000 30 56.37 0.00 0.00 0.0000 4251.05 0.0000

40 36.41 0.00 0.00 0.0000 3540.67 0.0000 40 36.41 0.00 0.00 0.0000 3540.67 0.0000

50 25.36 0.00 0.00 0.0000 3001.30 0.0000 50 25.36 0.00 0.00 0.0000 3001.30 0.0000

60 18.66 0.00 0.00 0.0000 2575.36 0.0000 60 18.66 0.00 0.00 0.0000 2575.36 0.0000

80 11.32 0.00 0.00 0.0000 1951.11 0.0000 80 11.32 0.00 0.00 0.0000 1951.11 0.0000

100 7.60 0.00 0.00 0.0000 1532.53 0.0000 100 7.60 0.00 0.00 0.0000 1532.53 0.0000

150 3.61 0.00 0.00 0.0000 943.04 0.0000 150 3.61 0.00 0.00 0.0000 943.04 0.0000

200 2.11 0.00 0.00 0.0000 647.01 0.0000 200 2.11 0.00 0.00 0.0000 647.01 0.0000

250 1.38 0.00 0.00 0.0000 477.16 0.0000 250 1.38 0.00 0.00 0.0000 477.16 0.0000

500 0.36 0.00 0.00 0.0000 180.51 0.0000 500 0.36 0.00 0.00 0.0000 180.51 0.0000

1000 0.10 0.00 0.00 0.0000 70.25 0.0000 1000 0.10 0.00 0.00 0.0000 70.25 0.0000

97% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0612

Ann Rate [g/s]: 0.0064

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 74.17 0.95 0.40 0.0007 4985.68 0.0000 20 0.95 0.40 0.0007 0.0000

30 56.37 0.72 0.31 0.0006 4251.05 0.0000 30 0.72 0.31 0.0006 0.0000

40 36.41 0.47 0.20 0.0004 3540.67 0.0000 40 0.47 0.20 0.0004 0.0000

50 25.36 0.32 0.14 0.0003 3001.30 0.0000 50 0.32 0.14 0.0003 0.0000

60 18.66 0.24 0.10 0.0002 2575.36 0.0000 60 0.24 0.10 0.0002 0.0000

80 11.32 0.14 0.06 0.0001 1951.11 0.0000 80 0.14 0.06 0.0001 0.0000

100 7.60 0.10 0.04 0.0001 1532.53 0.0000 100 0.10 0.04 0.0001 0.0000

150 3.61 0.05 0.02 3.6E-05 943.04 0.0000 150 0.05 0.02 3.6E-05 0.0000

200 2.11 0.03 0.01 2.1E-05 647.01 0.0000 200 0.03 0.01 2.1E-05 0.0000

250 1.38 0.02 0.01 1.4E-05 477.16 0.0000 250 0.02 0.01 1.4E-05 0.0000

500 0.36 0.00 0.00 3.6E-06 180.51 0.0000 500 0.00 0.00 3.6E-06 0.0000

1000 0.10 0.00 0.00 9.6E-07 70.25 0.0000 1000 0.00 0.00 9.6E-07 0.0000

D-183
Averaged Multicomponent Health Impacts from General Degreasers for Facility G-02

Weightings: 1 24% Perc 5.3%

2 41% Perc/55% MeCl 1.1%

3 46% MeCl 7.2%

4 97% TCE 86.0%

Total Health Impacts

Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center Resident Worker Chronic Acute

20 0.89 0.38 0.0009 0.0012

30 0.67 0.29 0.0007 0.0010

40 0.43 0.19 0.0004 0.0008

50 0.30 0.13 0.0003 0.0007

60 0.22 0.09 0.0002 0.0006

80 0.14 0.06 0.0001 0.0005

100 0.09 0.04 0.0001 0.0004

150 0.04 0.02 4.4E-05 0.0002

200 0.03 0.01 2.5E-05 0.0001

250 0.02 0.01 1.7E-05 0.0001

500 0.00 0.00 4.4E-06 4.2E-05

1000 0.00 0.00 1.2E-06 1.6E-05

D-184
Facility G-03 - 24% Perc

Met Set: Averaged

24% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0151 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0016 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 16.68 0.16 0.07 0.0008 1231.74 0.0009 20 16.68 0.00 0.00 0.0000 1231.74 0.0000

30 33.45 0.32 0.13 0.0015 1650.82 0.0012 30 33.45 0.00 0.00 0.0000 1650.82 0.0000

40 27.02 0.26 0.11 0.0012 1484.02 0.0011 40 27.02 0.00 0.00 0.0000 1484.02 0.0000

50 25.03 0.24 0.10 0.0011 2079.26 0.0016 50 25.03 0.00 0.00 0.0000 2079.26 0.0000

60 20.90 0.20 0.08 0.0010 1915.91 0.0014 60 20.90 0.00 0.00 0.0000 1915.91 0.0000

80 12.23 0.12 0.05 0.0006 1479.75 0.0011 80 12.23 0.00 0.00 0.0000 1479.75 0.0000

100 8.02 0.08 0.03 0.0004 1184.75 0.0009 100 8.02 0.00 0.00 0.0000 1184.75 0.0000

150 3.71 0.04 0.01 0.0002 769.33 0.0006 150 3.71 0.00 0.00 0.0000 769.33 0.0000

200 2.14 0.02 0.01 0.0001 550.34 0.0004 200 2.14 0.00 0.00 0.0000 550.34 0.0000

250 1.39 0.01 0.01 0.0001 417.99 0.0003 250 1.39 0.00 0.00 0.0000 417.99 0.0000

500 0.36 0.00 0.00 1.7E-05 169.20 0.0001 500 0.36 0.00 0.00 0.0000 169.20 0.0000

1000 0.10 0.00 0.00 4.4E-06 68.13 5.1E-05 1000 0.10 0.00 0.00 0.0000 68.13 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 16.68 0.00 0.00 0.0000 1231.74 0.0000 20 0.16 0.07 0.0008 0.0009

30 33.45 0.00 0.00 0.0000 1650.82 0.0000 30 0.32 0.13 0.0015 0.0012

40 27.02 0.00 0.00 0.0000 1484.02 0.0000 40 0.26 0.11 0.0012 0.0011

50 25.03 0.00 0.00 0.0000 2079.26 0.0000 50 0.24 0.10 0.0011 0.0016

60 20.90 0.00 0.00 0.0000 1915.91 0.0000 60 0.20 0.08 0.0010 0.0014

80 12.23 0.00 0.00 0.0000 1479.75 0.0000 80 0.12 0.05 0.0006 0.0011

100 8.02 0.00 0.00 0.0000 1184.75 0.0000 100 0.08 0.03 0.0004 0.0009

150 3.71 0.00 0.00 0.0000 769.33 0.0000 150 0.04 0.01 0.0002 0.0006

200 2.14 0.00 0.00 0.0000 550.34 0.0000 200 0.02 0.01 0.0001 0.0004

250 1.39 0.00 0.00 0.0000 417.99 0.0000 250 0.01 0.01 0.0001 0.0003

500 0.36 0.00 0.00 0.0000 169.20 0.0000 500 0.00 0.00 1.7E-05 0.0001

1000 0.10 0.00 0.00 0.0000 68.13 0.0000 1000 0.00 0.00 4.4E-06 5.1E-05

D-185
Facility G-03 - 41% Perc, 55% MeCl

Met Set: Averaged

41% Perc 55% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0259 op hrs/wk: 57 Acu Rate [g/s]: 0.0347

Ann Rate [g/s]: 0.0027 Ann Rate [g/s]: 0.0036

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 16.68 0.27 0.11 0.0013 1231.74 0.0016 20 16.68 0.06 0.03 0.0002 1231.74 0.0031

30 33.45 0.53 0.23 0.0026 1650.82 0.0021 30 33.45 0.12 0.05 0.0003 1650.82 0.0041

40 27.02 0.43 0.18 0.0021 1484.02 0.0019 40 27.02 0.10 0.04 0.0002 1484.02 0.0037

50 25.03 0.40 0.17 0.0019 2079.26 0.0027 50 25.03 0.09 0.04 0.0002 2079.26 0.0052

60 20.90 0.33 0.14 0.0016 1915.91 0.0025 60 20.90 0.08 0.03 0.0002 1915.91 0.0047

80 12.23 0.19 0.08 0.0009 1479.75 0.0019 80 12.23 0.04 0.02 0.0001 1479.75 0.0037

100 8.02 0.13 0.05 0.0006 1184.75 0.0015 100 8.02 0.03 0.01 0.0001 1184.75 0.0029

150 3.71 0.06 0.03 0.0003 769.33 0.0010 150 3.71 0.01 0.01 3.3E-05 769.33 0.0019

200 2.14 0.03 0.01 1.6E-04 550.34 0.0007 200 2.14 0.01 0.00 1.9E-05 550.34 0.0014

250 1.39 0.02 0.01 1.1E-04 417.99 0.0005 250 1.39 0.01 0.00 1.3E-05 417.99 0.0010

500 0.36 0.01 0.00 2.8E-05 169.20 2.2E-04 500 0.36 0.00 0.00 3.3E-06 169.20 0.0004

1000 0.10 0.00 0.00 7.4E-06 68.13 8.8E-05 1000 0.10 0.00 0.00 8.6E-07 68.13 0.0002

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0000

Ann Rate [g/s]: 0.0000

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 16.68 0.00 0.00 0.0000 1231.74 0.0000 20 0.33 0.14 0.0014 0.0046

30 33.45 0.00 0.00 0.0000 1650.82 0.0000 30 0.65 0.28 0.0029 0.0062

40 27.02 0.00 0.00 0.0000 1484.02 0.0000 40 0.53 0.22 0.0023 0.0056

50 25.03 0.00 0.00 0.0000 2079.26 0.0000 50 0.49 0.21 0.0022 0.0078

60 20.90 0.00 0.00 0.0000 1915.91 0.0000 60 0.41 0.17 0.0018 0.0072

80 12.23 0.00 0.00 0.0000 1479.75 0.0000 80 0.24 0.10 0.0011 0.0056

100 8.02 0.00 0.00 0.0000 1184.75 0.0000 100 0.16 0.07 0.0007 0.0045

150 3.71 0.00 0.00 0.0000 769.33 0.0000 150 0.07 0.03 0.0003 0.0029

200 2.14 0.00 0.00 0.0000 550.34 0.0000 200 0.04 0.02 0.0002 0.0021

250 1.39 0.00 0.00 0.0000 417.99 0.0000 250 0.03 0.01 1.2E-04 0.0016

500 0.36 0.00 0.00 0.0000 169.20 0.0000 500 0.01 0.00 3.1E-05 6.4E-04

1000 0.10 0.00 0.00 0.0000 68.13 0.0000 1000 0.00 0.00 8.3E-06 2.6E-04

D-186
Facility G-03 - 46% MeCl

Met Set: Averaged

0% Perc 46% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0.0290

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0.0030

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 16.68 0.00 0.00 0.0000 1231.74 0.0000 20 16.68 0.05 0.02 1.7E-05 1231.74 0.0026

30 33.45 0.00 0.00 0.0000 1650.82 0.0000 30 33.45 0.10 0.04 3.3E-05 1650.82 0.0034

40 27.02 0.00 0.00 0.0000 1484.02 0.0000 40 27.02 0.08 0.03 2.7E-05 1484.02 0.0031

50 25.03 0.00 0.00 0.0000 2079.26 0.0000 50 25.03 0.08 0.03 2.5E-05 2079.26 0.0043

60 20.90 0.00 0.00 0.0000 1915.91 0.0000 60 20.90 0.06 0.03 2.1E-05 1915.91 0.0040

80 12.23 0.00 0.00 0.0000 1479.75 0.0000 80 12.23 0.04 0.02 1.2E-05 1479.75 0.0031

100 8.02 0.00 0.00 0.0000 1184.75 0.0000 100 8.02 0.02 0.01 8.0E-06 1184.75 0.0025

150 3.71 0.00 0.00 0.0000 769.33 0.0000 150 3.71 0.01 0.00 3.7E-06 769.33 0.0016

200 2.14 0.00 0.00 0.0000 550.34 0.0000 200 2.14 0.01 0.00 2.1E-06 550.34 0.0011

250 1.39 0.00 0.00 0.0000 417.99 0.0000 250 1.39 0.00 0.00 1.4E-06 417.99 0.0009

500 0.36 0.00 0.00 0.0000 169.20 0.0000 500 0.36 0.00 0.00 3.6E-07 169.20 0.0004

1000 0.10 0.00 0.00 0.0000 68.13 0.0000 1000 0.10 0.00 0.00 9.6E-08 68.13 0.0001

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 16.68 0.00 0.00 0.0000 1231.74 0.0000 20 0.05 0.02 1.7E-05 0.0026

30 33.45 0.00 0.00 0.0000 1650.82 0.0000 30 0.10 0.04 3.3E-05 0.0034

40 27.02 0.00 0.00 0.0000 1484.02 0.0000 40 0.08 0.03 2.7E-05 0.0031

50 25.03 0.00 0.00 0.0000 2079.26 0.0000 50 0.08 0.03 2.5E-05 0.0043

60 20.90 0.00 0.00 0.0000 1915.91 0.0000 60 0.06 0.03 2.1E-05 0.0040

80 12.23 0.00 0.00 0.0000 1479.75 0.0000 80 0.04 0.02 1.2E-05 0.0031

100 8.02 0.00 0.00 0.0000 1184.75 0.0000 100 0.02 0.01 8.0E-06 0.0025

150 3.71 0.00 0.00 0.0000 769.33 0.0000 150 0.01 0.00 3.7E-06 0.0016

200 2.14 0.00 0.00 0.0000 550.34 0.0000 200 0.01 0.00 2.1E-06 0.0011

250 1.39 0.00 0.00 0.0000 417.99 0.0000 250 0.00 0.00 1.4E-06 0.0009

500 0.36 0.00 0.00 0.0000 169.20 0.0000 500 0.00 0.00 3.6E-07 0.0004

1000 0.10 0.00 0.00 0.0000 68.13 0.0000 1000 0.00 0.00 9.6E-08 0.0001

D-187
Facility G-03 - 97% TCE

Met Set: Averaged

0% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 16.68 0.00 0.00 0.0000 1231.74 0.0000 20 16.68 0.00 0.00 0.0000 1231.74 0.0000

30 33.45 0.00 0.00 0.0000 1650.82 0.0000 30 33.45 0.00 0.00 0.0000 1650.82 0.0000

40 27.02 0.00 0.00 0.0000 1484.02 0.0000 40 27.02 0.00 0.00 0.0000 1484.02 0.0000

50 25.03 0.00 0.00 0.0000 2079.26 0.0000 50 25.03 0.00 0.00 0.0000 2079.26 0.0000

60 20.90 0.00 0.00 0.0000 1915.91 0.0000 60 20.90 0.00 0.00 0.0000 1915.91 0.0000

80 12.23 0.00 0.00 0.0000 1479.75 0.0000 80 12.23 0.00 0.00 0.0000 1479.75 0.0000

100 8.02 0.00 0.00 0.0000 1184.75 0.0000 100 8.02 0.00 0.00 0.0000 1184.75 0.0000

150 3.71 0.00 0.00 0.0000 769.33 0.0000 150 3.71 0.00 0.00 0.0000 769.33 0.0000

200 2.14 0.00 0.00 0.0000 550.34 0.0000 200 2.14 0.00 0.00 0.0000 550.34 0.0000

250 1.39 0.00 0.00 0.0000 417.99 0.0000 250 1.39 0.00 0.00 0.0000 417.99 0.0000

500 0.36 0.00 0.00 0.0000 169.20 0.0000 500 0.36 0.00 0.00 0.0000 169.20 0.0000

1000 0.10 0.00 0.00 0.0000 68.13 0.0000 1000 0.10 0.00 0.00 0.0000 68.13 0.0000

98% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0612

Ann Rate [g/s]: 0.0064

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Center Resident Worker Chronic Acute

20 16.68 0.21 0.09 0.0002 1231.74 0.0000 20 0.21 0.09 0.0002 0.0000

30 33.45 0.43 0.18 0.0003 1650.82 0.0000 30 0.43 0.18 0.0003 0.0000

40 27.02 0.35 0.15 0.0003 1484.02 0.0000 40 0.35 0.15 0.0003 0.0000

50 25.03 0.32 0.14 0.0003 2079.26 0.0000 50 0.32 0.14 0.0003 0.0000

60 20.90 0.27 0.11 0.0002 1915.91 0.0000 60 0.27 0.11 0.0002 0.0000

80 12.23 0.16 0.07 0.0001 1479.75 0.0000 80 0.16 0.07 0.0001 0.0000

100 8.02 0.10 0.04 0.0001 1184.75 0.0000 100 0.10 0.04 0.0001 0.0000

150 3.71 0.05 0.02 3.7E-05 769.33 0.0000 150 0.05 0.02 3.7E-05 0.0000

200 2.14 0.03 0.01 2.1E-05 550.34 0.0000 200 0.03 0.01 2.1E-05 0.0000

250 1.39 0.02 0.01 1.4E-05 417.99 0.0000 250 0.02 0.01 1.4E-05 0.0000

500 0.36 0.00 0.00 3.6E-06 169.20 0.0000 500 0.00 0.00 3.6E-06 0.0000

1000 0.10 0.00 0.00 9.6E-07 68.13 0.0000 1000 0.00 0.00 9.6E-07 0.0000

D-188
Averaged Multicomponent Health Impacts from General Degreasers for Facility G-03

Weightings: 1 24% Perc 5.3%

2 41% Perc/55% MeCl 1.1%

3 46% MeCl 7.2%

4 97% TCE 86.0%

Total Health Impacts

Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Center Resident Worker Chronic Acute

20 0.20 0.08 0.0002 0.0003

30 0.40 0.17 0.0004 0.0004

40 0.32 0.14 0.0003 0.0003

50 0.30 0.13 0.0003 0.0005

60 0.25 0.11 0.0003 0.0004

80 0.15 0.06 0.0001 0.0003

100 0.10 0.04 0.0001 0.0003

150 0.04 0.02 4.5E-05 0.0002

200 0.03 0.01 2.6E-05 0.0001

250 0.02 0.01 1.7E-05 0.0001

500 0.00 0.00 4.4E-06 3.9E-05

1000 0.00 0.00 1.2E-06 1.6E-05

D-189
Risk Assessment Summary - 3 Generic Facilities

Multicomponent Impacts - General Degreasers - Default Met

Facility G-01 - 24% Perc

Met Set: Default-0

24% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0151 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0016 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 307.03 2.90 1.23 0.0140 11342.73 0.0086 20 307.03 0.00 0.00 0.0000 11342.73 0.0000

30 229.98 2.17 0.92 0.0105 8496.33 0.0064 30 229.98 0.00 0.00 0.0000 8496.33 0.0000

40 178.09 1.68 0.72 0.0081 6579.11 0.0050 40 178.09 0.00 0.00 0.0000 6579.11 0.0000

50 141.80 1.34 0.57 0.0065 5238.72 0.0040 50 141.80 0.00 0.00 0.0000 5238.72 0.0000

60 115.56 1.09 0.46 0.0053 4269.33 0.0032 60 115.56 0.00 0.00 0.0000 4269.33 0.0000

80 81.09 0.77 0.33 0.0037 2995.85 0.0023 80 81.09 0.00 0.00 0.0000 2995.85 0.0000

100 60.18 0.57 0.24 0.0028 2223.11 0.0017 100 60.18 0.00 0.00 0.0000 2223.11 0.0000

150 33.55 0.32 0.13 0.0015 1239.31 0.0009 150 33.55 0.00 0.00 0.0000 1239.31 0.0000

200 21.63 0.20 0.09 0.0010 799.09 0.0006 200 21.63 0.00 0.00 0.0000 799.09 0.0000

250 15.25 0.14 0.06 0.0007 563.57 0.0004 250 15.25 0.00 0.00 0.0000 563.57 0.0000

500 5.08 0.05 0.02 0.0002 187.51 0.0001 500 5.08 0.00 0.00 0.0000 187.51 0.0000

1000 1.74 0.02 0.01 0.0001 64.26 4.9E-05 1000 1.74 0.00 0.00 0.0000 64.26 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 307.03 0.00 0.00 0.0000 11342.73 0.0000 20 2.90 1.23 0.0140 0.0086

30 229.98 0.00 0.00 0.0000 8496.33 0.0000 30 2.17 0.92 0.0105 0.0064

40 178.09 0.00 0.00 0.0000 6579.11 0.0000 40 1.68 0.72 0.0081 0.0050

50 141.80 0.00 0.00 0.0000 5238.72 0.0000 50 1.34 0.57 0.0065 0.0040

60 115.56 0.00 0.00 0.0000 4269.33 0.0000 60 1.09 0.46 0.0053 0.0032

80 81.09 0.00 0.00 0.0000 2995.85 0.0000 80 0.77 0.33 0.0037 0.0023

100 60.18 0.00 0.00 0.0000 2223.11 0.0000 100 0.57 0.24 0.0028 0.0017

150 33.55 0.00 0.00 0.0000 1239.31 0.0000 150 0.32 0.13 0.0015 0.0009

200 21.63 0.00 0.00 0.0000 799.09 0.0000 200 0.20 0.09 0.0010 0.0006

250 15.25 0.00 0.00 0.0000 563.57 0.0000 250 0.14 0.06 0.0007 0.0004

500 5.08 0.00 0.00 0.0000 187.51 0.0000 500 0.05 0.02 0.0002 0.0001

1000 1.74 0.00 0.00 0.0000 64.26 0.0000 1000 0.02 0.01 0.0001 4.9E-05

D-190
Facility G-01 - 41% Perc, 55% MeCl

Met Set: Default-0

41% Perc 55% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0259 op hrs/wk: 57 Acu Rate [g/s]: 0.0347

Ann Rate [g/s]: 0.0027 Ann Rate [g/s]: 0.0036

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 307.03 4.89 2.08 0.0237 11342.73 0.0147 20 307.03 1.11 0.47 0.0028 11342.73 0.0281

30 229.98 3.66 1.56 0.0177 8496.33 0.0110 30 229.98 0.83 0.35 0.0021 8496.33 0.0211

40 178.09 2.84 1.21 0.0137 6579.11 0.0085 40 178.09 0.64 0.27 0.0016 6579.11 0.0163

50 141.80 2.26 0.96 0.0109 5238.72 0.0068 50 141.80 0.51 0.22 0.0013 5238.72 0.0130

60 115.56 1.84 0.78 0.0089 4269.33 0.0055 60 115.56 0.42 0.18 0.0010 4269.33 0.0106

80 81.09 1.29 0.55 0.0063 2995.85 0.0039 80 81.09 0.29 0.12 0.0007 2995.85 0.0074

100 60.18 0.96 0.41 0.0046 2223.11 0.0029 100 60.18 0.22 0.09 0.0005 2223.11 0.0055

150 33.55 0.53 0.23 0.0026 1239.31 0.0016 150 33.55 0.12 0.05 0.0003 1239.31 0.0031

200 21.63 0.34 0.15 0.0017 799.09 0.0010 200 21.63 0.08 0.03 0.0002 799.09 0.0020

250 15.25 0.24 0.10 0.0012 563.57 0.0007 250 15.25 0.05 0.02 0.0001 563.57 0.0014

500 5.08 0.08 0.03 0.0004 187.51 0.0002 500 5.08 0.02 0.01 4.57E-05 187.51 0.0005

1000 1.74 0.03 0.01 0.0001 64.26 0.0001 1000 1.74 0.01 0.00 1.57E-05 64.26 0.0002

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 307.03 0.00 0.00 0.0000 11342.73 0.0000 20 6.00 2.55 0.0264 0.0428

30 229.98 0.00 0.00 0.0000 8496.33 0.0000 30 4.49 1.91 0.0198 0.0321

40 178.09 0.00 0.00 0.0000 6579.11 0.0000 40 3.48 1.48 0.0153 0.0248

50 141.80 0.00 0.00 0.0000 5238.72 0.0000 50 2.77 1.18 0.0122 0.0198

60 115.56 0.00 0.00 0.0000 4269.33 0.0000 60 2.26 0.96 0.0100 0.0161

80 81.09 0.00 0.00 0.0000 2995.85 0.0000 80 1.58 0.67 0.0070 0.0113

100 60.18 0.00 0.00 0.0000 2223.11 0.0000 100 1.18 0.50 0.0052 0.0084

150 33.55 0.00 0.00 0.0000 1239.31 0.0000 150 0.66 0.28 0.0029 0.0047

200 21.63 0.00 0.00 0.0000 799.09 0.0000 200 0.42 0.18 0.0019 0.0030

250 15.25 0.00 0.00 0.0000 563.57 0.0000 250 0.30 0.13 0.0013 0.0021

500 5.08 0.00 0.00 0.0000 187.51 0.0000 500 0.10 0.04 0.0004 0.0007

1000 1.74 0.00 0.00 0.0000 64.26 0.0000 1000 0.03 0.01 0.0001 0.0002

D-191
Facility G-01 - 46% MeCl

Met Set: Default-0

0% Perc 46% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0.0290

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0.0030

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 307.03 0.00 0.00 0.0000 11342.73 0.0000 20 307.03 0.92 0.39 0.0003 11342.73 0.0235

30 229.98 0.00 0.00 0.0000 8496.33 0.0000 30 229.98 0.69 0.29 0.0002 8496.33 0.0176

40 178.09 0.00 0.00 0.0000 6579.11 0.0000 40 178.09 0.53 0.23 0.0002 6579.11 0.0136

50 141.80 0.00 0.00 0.0000 5238.72 0.0000 50 141.80 0.43 0.18 0.0001 5238.72 0.0109

60 115.56 0.00 0.00 0.0000 4269.33 0.0000 60 115.56 0.35 0.15 0.0001 4269.33 0.0088

80 81.09 0.00 0.00 0.0000 2995.85 0.0000 80 81.09 0.24 0.10 0.0001 2995.85 0.0062

100 60.18 0.00 0.00 0.0000 2223.11 0.0000 100 60.18 0.18 0.08 0.0001 2223.11 0.0046

150 33.55 0.00 0.00 0.0000 1239.31 0.0000 150 33.55 0.10 0.04 3.4E-05 1239.31 0.0026

200 21.63 0.00 0.00 0.0000 799.09 0.0000 200 21.63 0.06 0.03 2.2E-05 799.09 0.0017

250 15.25 0.00 0.00 0.0000 563.57 0.0000 250 15.25 0.05 0.02 1.5E-05 563.57 0.0012

500 5.08 0.00 0.00 0.0000 187.51 0.0000 500 5.08 0.02 0.01 5.1E-06 187.51 0.0004

1000 1.74 0.00 0.00 0.0000 64.26 0.0000 1000 1.74 0.01 0.00 1.7E-06 64.26 0.0001

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 307.03 0.00 0.00 0.0000 11342.73 0.0000 20 0.92 0.39 0.0003 0.0235

30 229.98 0.00 0.00 0.0000 8496.33 0.0000 30 0.69 0.29 0.0002 0.0176

40 178.09 0.00 0.00 0.0000 6579.11 0.0000 40 0.53 0.23 0.0002 0.0136

50 141.80 0.00 0.00 0.0000 5238.72 0.0000 50 0.43 0.18 0.0001 0.0109

60 115.56 0.00 0.00 0.0000 4269.33 0.0000 60 0.35 0.15 0.0001 0.0088

80 81.09 0.00 0.00 0.0000 2995.85 0.0000 80 0.24 0.10 0.0001 0.0062

100 60.18 0.00 0.00 0.0000 2223.11 0.0000 100 0.18 0.08 0.0001 0.0046

150 33.55 0.00 0.00 0.0000 1239.31 0.0000 150 0.10 0.04 3.4E-05 0.0026

200 21.63 0.00 0.00 0.0000 799.09 0.0000 200 0.06 0.03 2.2E-05 0.0017

250 15.25 0.00 0.00 0.0000 563.57 0.0000 250 0.05 0.02 1.5E-05 0.0012

500 5.08 0.00 0.00 0.0000 187.51 0.0000 500 0.02 0.01 5.1E-06 0.0004

1000 1.74 0.00 0.00 0.0000 64.26 0.0000 1000 0.01 0.00 1.7E-06 0.0001

D-192
Facility G-01 - 97% TCE

Met Set: Default-0

0% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 307.03 0.00 0.00 0.0000 11342.73 0.0000 20 307.03 0.00 0.00 0.0000 11342.73 0.0000

30 229.98 0.00 0.00 0.0000 8496.33 0.0000 30 229.98 0.00 0.00 0.0000 8496.33 0.0000

40 178.09 0.00 0.00 0.0000 6579.11 0.0000 40 178.09 0.00 0.00 0.0000 6579.11 0.0000

50 141.80 0.00 0.00 0.0000 5238.72 0.0000 50 141.80 0.00 0.00 0.0000 5238.72 0.0000

60 115.56 0.00 0.00 0.0000 4269.33 0.0000 60 115.56 0.00 0.00 0.0000 4269.33 0.0000

80 81.09 0.00 0.00 0.0000 2995.85 0.0000 80 81.09 0.00 0.00 0.0000 2995.85 0.0000

100 60.18 0.00 0.00 0.0000 2223.11 0.0000 100 60.18 0.00 0.00 0.0000 2223.11 0.0000

150 33.55 0.00 0.00 0.0000 1239.31 0.0000 150 33.55 0.00 0.00 0.0000 1239.31 0.0000

200 21.63 0.00 0.00 0.0000 799.09 0.0000 200 21.63 0.00 0.00 0.0000 799.09 0.0000

250 15.25 0.00 0.00 0.0000 563.57 0.0000 250 15.25 0.00 0.00 0.0000 563.57 0.0000

500 5.08 0.00 0.00 0.0000 187.51 0.0000 500 5.08 0.00 0.00 0.0000 187.51 0.0000

1000 1.74 0.00 0.00 0.0000 64.26 0.0000 1000 1.74 0.00 0.00 0.0000 64.26 0.0000

97% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0612

Ann Rate [g/s]: 0.0064

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 307.03 3.93 1.67 0.0031 11342.73 0.0000 20 3.93 1.67 0.0031 0.0000

30 229.98 2.94 1.25 0.0023 8496.33 0.0000 30 2.94 1.25 0.0023 0.0000

40 178.09 2.28 0.97 0.0018 6579.11 0.0000 40 2.28 0.97 0.0018 0.0000

50 141.80 1.82 0.77 0.0014 5238.72 0.0000 50 1.82 0.77 0.0014 0.0000

60 115.56 1.48 0.63 0.0012 4269.33 0.0000 60 1.48 0.63 0.0012 0.0000

80 81.09 1.04 0.44 0.0008 2995.85 0.0000 80 1.04 0.44 0.0008 0.0000

100 60.18 0.77 0.33 0.0006 2223.11 0.0000 100 0.77 0.33 0.0006 0.0000

150 33.55 0.43 0.18 0.0003 1239.31 0.0000 150 0.43 0.18 0.0003 0.0000

200 21.63 0.28 0.12 0.0002 799.09 0.0000 200 0.28 0.12 0.0002 0.0000

250 15.25 0.20 0.08 0.0002 563.57 0.0000 250 0.20 0.08 0.0002 0.0000

500 5.08 0.06 0.03 0.0001 187.51 0.0000 500 0.06 0.03 0.0001 0.0000

1000 1.74 0.02 0.01 1.7E-05 64.26 0.0000 1000 0.02 0.01 1.7E-05 0.0000

D-193
Averaged Multicomponent Health Impacts from General Degreasers for Facility G-01

Weightings: 1 24% Perc 5.3%

2 41% Perc/55% MeCl 1.1%

3 46% MeCl 7.2%

4 97% TCE 86.0%

Total Health Impacts

Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope Resident Worker Chronic Acute

20 3.67 1.56 0.0037 0.0026

30 2.75 1.17 0.0028 0.0020

40 2.13 0.91 0.0021 0.0015

50 1.69 0.72 0.0017 0.0012

60 1.38 0.59 0.0014 0.0010

80 0.97 0.41 0.0010 0.0007

100 0.72 0.31 0.0007 0.0005

150 0.40 0.17 0.0004 0.0003

200 0.26 0.11 0.0003 0.0002

250 0.18 0.08 0.0002 0.0001

500 0.06 0.03 0.0001 4.3E-05

1000 0.02 0.01 2.1E-05 1.5E-05

D-194
Facility G-02 - 24% Perc

Met Set: Default-0

24% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0151 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0016 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 142.83 1.35 0.57 0.0065 5276.51 0.0040 20 142.83 0.00 0.00 0.0000 5276.51 0.0000

30 117.98 1.11 0.47 0.0054 4358.64 0.0033 30 117.98 0.00 0.00 0.0000 4358.64 0.0000

40 98.78 0.93 0.40 0.0045 3649.09 0.0028 40 98.78 0.00 0.00 0.0000 3649.09 0.0000

50 83.77 0.79 0.34 0.0038 3094.79 0.0023 50 83.77 0.00 0.00 0.0000 3094.79 0.0000

60 71.89 0.68 0.29 0.0033 2656.01 0.0020 60 71.89 0.00 0.00 0.0000 2656.01 0.0000

80 54.62 0.52 0.22 0.0025 2017.70 0.0015 80 54.62 0.00 0.00 0.0000 2017.70 0.0000

100 42.94 0.41 0.17 0.0020 1586.22 0.0012 100 42.94 0.00 0.00 0.0000 1586.22 0.0000

150 26.25 0.25 0.11 0.0012 969.72 0.0007 150 26.25 0.00 0.00 0.0000 969.72 0.0000

200 17.86 0.17 0.07 0.0008 659.99 0.0005 200 17.86 0.00 0.00 0.0000 659.99 0.0000

250 13.05 0.12 0.05 0.0006 482.19 0.0004 250 13.05 0.00 0.00 0.0000 482.19 0.0000

500 4.69 0.04 0.02 0.0002 173.33 0.0001 500 4.69 0.00 0.00 0.0000 173.33 0.0000

1000 1.68 0.02 0.01 0.0001 61.90 4.7E-05 1000 1.68 0.00 0.00 0.0000 61.90 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 142.83 0.00 0.00 0.0000 5276.51 0.0000 20 1.35 0.57 0.0065 0.0040

30 117.98 0.00 0.00 0.0000 4358.64 0.0000 30 1.11 0.47 0.0054 0.0033

40 98.78 0.00 0.00 0.0000 3649.09 0.0000 40 0.93 0.40 0.0045 0.0028

50 83.77 0.00 0.00 0.0000 3094.79 0.0000 50 0.79 0.34 0.0038 0.0023

60 71.89 0.00 0.00 0.0000 2656.01 0.0000 60 0.68 0.29 0.0033 0.0020

80 54.62 0.00 0.00 0.0000 2017.70 0.0000 80 0.52 0.22 0.0025 0.0015

100 42.94 0.00 0.00 0.0000 1586.22 0.0000 100 0.41 0.17 0.0020 0.0012

150 26.25 0.00 0.00 0.0000 969.72 0.0000 150 0.25 0.11 0.0012 0.0007

200 17.86 0.00 0.00 0.0000 659.99 0.0000 200 0.17 0.07 0.0008 0.0005

250 13.05 0.00 0.00 0.0000 482.19 0.0000 250 0.12 0.05 0.0006 0.0004

500 4.69 0.00 0.00 0.0000 173.33 0.0000 500 0.04 0.02 0.0002 0.0001

1000 1.68 0.00 0.00 0.0000 61.90 0.0000 1000 0.02 0.01 0.0001 4.7E-05

D-195
Facility G-02 - 41% Perc, 55% MeCl

Met Set: Default-0

41% Perc 55% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0259 op hrs/wk: 57 Acu Rate [g/s]: 0.0347

Ann Rate [g/s]: 0.0027 Ann Rate [g/s]: 0.0036

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 142.83 2.28 0.97 0.0110 5276.51 0.0068 20 142.83 0.51 0.22 0.0013 5276.51 0.0131

30 117.98 1.88 0.80 0.0091 4358.64 0.0056 30 117.98 0.42 0.18 0.0011 4358.64 0.0108

40 98.78 1.57 0.67 0.0076 3649.09 0.0047 40 98.78 0.36 0.15 0.0009 3649.09 0.0090

50 83.77 1.33 0.57 0.0065 3094.79 0.0040 50 83.77 0.30 0.13 0.0008 3094.79 0.0077

60 71.89 1.15 0.49 0.0055 2656.01 0.0034 60 71.89 0.26 0.11 0.0006 2656.01 0.0066

80 54.62 0.87 0.37 0.0042 2017.70 0.0026 80 54.62 0.20 0.08 0.0005 2017.70 0.0050

100 42.94 0.68 0.29 0.0033 1586.22 0.0021 100 42.94 0.15 0.07 0.0004 1586.22 0.0039

150 26.25 0.42 0.18 0.0020 969.72 0.0013 150 26.25 0.09 0.04 0.0002 969.72 0.0024

200 17.86 0.28 0.12 0.0014 659.99 0.0009 200 17.86 0.06 0.03 0.0002 659.99 0.0016

250 13.05 0.21 0.09 0.0010 482.19 0.0006 250 13.05 0.05 0.02 0.0001 482.19 0.0012

500 4.69 0.07 0.03 0.0004 173.33 0.0002 500 4.69 0.02 0.01 4.2E-05 173.33 0.0004

1000 1.68 0.03 0.01 0.0001 61.90 8.0E-05 1000 1.68 0.01 0.00 1.5E-05 61.90 0.0002

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 142.83 0.00 0.00 0.0000 5276.51 0.0000 20 2.79 1.19 0.0123 0.0199

30 117.98 0.00 0.00 0.0000 4358.64 0.0000 30 2.30 0.98 0.0102 0.0164

40 98.78 0.00 0.00 0.0000 3649.09 0.0000 40 1.93 0.82 0.0085 0.0138

50 83.77 0.00 0.00 0.0000 3094.79 0.0000 50 1.64 0.70 0.0072 0.0117

60 71.89 0.00 0.00 0.0000 2656.01 0.0000 60 1.40 0.60 0.0062 0.0100

80 54.62 0.00 0.00 0.0000 2017.70 0.0000 80 1.07 0.45 0.0047 0.0076

100 42.94 0.00 0.00 0.0000 1586.22 0.0000 100 0.84 0.36 0.0037 0.0060

150 26.25 0.00 0.00 0.0000 969.72 0.0000 150 0.51 0.22 0.0023 0.0037

200 17.86 0.00 0.00 0.0000 659.99 0.0000 200 0.35 0.15 0.0015 0.0025

250 13.05 0.00 0.00 0.0000 482.19 0.0000 250 0.25 0.11 0.0011 0.0018

500 4.69 0.00 0.00 0.0000 173.33 0.0000 500 0.09 0.04 0.0004 0.0007

1000 1.68 0.00 0.00 0.0000 61.90 0.0000 1000 0.03 0.01 1.4E-04 2.3E-04

D-196
Facility G-02 - 46% MeCl

Met Set: Default-0

0% Perc 46% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0.0290

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0.0030

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 142.83 0.00 0.00 0.0000 5276.51 0.0000 20 142.83 0.43 0.18 0.0001 5276.51 0.0109

30 117.98 0.00 0.00 0.0000 4358.64 0.0000 30 117.98 0.35 0.15 0.0001 4358.64 0.0090

40 98.78 0.00 0.00 0.0000 3649.09 0.0000 40 98.78 0.30 0.13 0.0001 3649.09 0.0076

50 83.77 0.00 0.00 0.0000 3094.79 0.0000 50 83.77 0.25 0.11 8.4E-05 3094.79 0.0064

60 71.89 0.00 0.00 0.0000 2656.01 0.0000 60 71.89 0.22 0.09 7.2E-05 2656.01 0.0055

80 54.62 0.00 0.00 0.0000 2017.70 0.0000 80 54.62 0.16 0.07 5.5E-05 2017.70 0.0042

100 42.94 0.00 0.00 0.0000 1586.22 0.0000 100 42.94 0.13 0.05 4.3E-05 1586.22 0.0033

150 26.25 0.00 0.00 0.0000 969.72 0.0000 150 26.25 0.08 0.03 2.6E-05 969.72 0.0020

200 17.86 0.00 0.00 0.0000 659.99 0.0000 200 17.86 0.05 0.02 1.8E-05 659.99 0.0014

250 13.05 0.00 0.00 0.0000 482.19 0.0000 250 13.05 0.04 0.02 1.3E-05 482.19 0.0010

500 4.69 0.00 0.00 0.0000 173.33 0.0000 500 4.69 0.01 0.01 4.7E-06 173.33 0.0004

1000 1.68 0.00 0.00 0.0000 61.90 0.0000 1000 1.68 0.01 0.00 1.7E-06 61.90 0.0001

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 142.83 0.00 0.00 0.0000 5276.51 0.0000 20 0.43 0.18 0.0001 0.0109

30 117.98 0.00 0.00 0.0000 4358.64 0.0000 30 0.35 0.15 0.0001 0.0090

40 98.78 0.00 0.00 0.0000 3649.09 0.0000 40 0.30 0.13 0.0001 0.0076

50 83.77 0.00 0.00 0.0000 3094.79 0.0000 50 0.25 0.11 8.4E-05 0.0064

60 71.89 0.00 0.00 0.0000 2656.01 0.0000 60 0.22 0.09 7.2E-05 0.0055

80 54.62 0.00 0.00 0.0000 2017.70 0.0000 80 0.16 0.07 5.5E-05 0.0042

100 42.94 0.00 0.00 0.0000 1586.22 0.0000 100 0.13 0.05 4.3E-05 0.0033

150 26.25 0.00 0.00 0.0000 969.72 0.0000 150 0.08 0.03 2.6E-05 0.0020

200 17.86 0.00 0.00 0.0000 659.99 0.0000 200 0.05 0.02 1.8E-05 0.0014

250 13.05 0.00 0.00 0.0000 482.19 0.0000 250 0.04 0.02 1.3E-05 0.0010

500 4.69 0.00 0.00 0.0000 173.33 0.0000 500 0.01 0.01 4.7E-06 0.0004

1000 1.68 0.00 0.00 0.0000 61.90 0.0000 1000 0.01 0.00 1.7E-06 0.0001

D-197
Facility G-02 - 97% TCE

Met Set: Default-0

0% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 142.83 0.00 0.00 0.0000 5276.51 0.0000 20 142.83 0.00 0.00 0.0000 5276.51 0.0000

30 117.98 0.00 0.00 0.0000 4358.64 0.0000 30 117.98 0.00 0.00 0.0000 4358.64 0.0000

40 98.78 0.00 0.00 0.0000 3649.09 0.0000 40 98.78 0.00 0.00 0.0000 3649.09 0.0000

50 83.77 0.00 0.00 0.0000 3094.79 0.0000 50 83.77 0.00 0.00 0.0000 3094.79 0.0000

60 71.89 0.00 0.00 0.0000 2656.01 0.0000 60 71.89 0.00 0.00 0.0000 2656.01 0.0000

80 54.62 0.00 0.00 0.0000 2017.70 0.0000 80 54.62 0.00 0.00 0.0000 2017.70 0.0000

100 42.94 0.00 0.00 0.0000 1586.22 0.0000 100 42.94 0.00 0.00 0.0000 1586.22 0.0000

150 26.25 0.00 0.00 0.0000 969.72 0.0000 150 26.25 0.00 0.00 0.0000 969.72 0.0000

200 17.86 0.00 0.00 0.0000 659.99 0.0000 200 17.86 0.00 0.00 0.0000 659.99 0.0000

250 13.05 0.00 0.00 0.0000 482.19 0.0000 250 13.05 0.00 0.00 0.0000 482.19 0.0000

500 4.69 0.00 0.00 0.0000 173.33 0.0000 500 4.69 0.00 0.00 0.0000 173.33 0.0000

1000 1.68 0.00 0.00 0.0000 61.90 0.0000 1000 1.68 0.00 0.00 0.0000 61.90 0.0000

97% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0612

Ann Rate [g/s]: 0.0064

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 142.83 1.83 0.78 0.0014 5276.51 0.0000 20 1.83 0.78 0.0014 0.0000

30 117.98 1.51 0.64 0.0012 4358.64 0.0000 30 1.51 0.64 0.0012 0.0000

40 98.78 1.26 0.54 0.0010 3649.09 0.0000 40 1.26 0.54 0.0010 0.0000

50 83.77 1.07 0.46 0.0008 3094.79 0.0000 50 1.07 0.46 0.0008 0.0000

60 71.89 0.92 0.39 0.0007 2656.01 0.0000 60 0.92 0.39 0.0007 0.0000

80 54.62 0.70 0.30 0.0005 2017.70 0.0000 80 0.70 0.30 0.0005 0.0000

100 42.94 0.55 0.23 0.0004 1586.22 0.0000 100 0.55 0.23 0.0004 0.0000

150 26.25 0.34 0.14 0.0003 969.72 0.0000 150 0.34 0.14 0.0003 0.0000

200 17.86 0.23 0.10 0.0002 659.99 0.0000 200 0.23 0.10 0.0002 0.0000

250 13.05 0.17 0.07 0.0001 482.19 0.0000 250 0.17 0.07 0.0001 0.0000

500 4.69 0.06 0.03 4.7E-05 173.33 0.0000 500 0.06 0.03 4.7E-05 0.0000

1000 1.68 0.02 0.01 1.7E-05 61.90 0.0000 1000 0.02 0.01 1.7E-05 0.0000

D-198
Averaged Multicomponent Health Impacts from General Degreasers for Facility G-02

Weightings: 1 24% Perc 5.3%

2 41% Perc/55% MeCl 1.1%

3 46% MeCl 7.2%

4 97% TCE 86.0%

Total Health Impacts

Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope Resident Worker Chronic Acute

20 1.71 0.73 0.0017 0.0012

30 1.41 0.60 0.0014 0.0010

40 1.18 0.50 0.0012 0.0008

50 1.00 0.43 0.0010 0.0007

60 0.86 0.37 0.0009 0.0006

80 0.65 0.28 0.0007 0.0005

100 0.51 0.22 0.0005 0.0004

150 0.31 0.13 0.0003 0.0002

200 0.21 0.09 0.0002 0.0002

250 0.16 0.07 0.0002 0.0001

500 0.06 0.02 0.0001 4.0E-05

1000 0.02 0.01 2.0E-05 1.4E-05

D-199
Facility G-03 - 24% Perc

Met Set: Default-0

24% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0151 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0.0016 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.30 0.70 0.30 0.0034 2744.96 0.0021 20 74.30 0.00 0.00 0.0000 2744.96 0.0000

30 64.57 0.61 0.26 0.0030 2385.45 0.0018 30 64.57 0.00 0.00 0.0000 2385.45 0.0000

40 56.52 0.53 0.23 0.0026 2088.05 0.0016 40 56.52 0.00 0.00 0.0000 2088.05 0.0000

50 49.84 0.47 0.20 0.0023 1841.40 0.0014 50 49.84 0.00 0.00 0.0000 1841.40 0.0000

60 44.27 0.42 0.18 0.0020 1635.59 0.0012 60 44.27 0.00 0.00 0.0000 1635.59 0.0000

80 35.62 0.34 0.14 0.0016 1315.96 0.0010 80 35.62 0.00 0.00 0.0000 1315.96 0.0000

100 29.32 0.28 0.12 0.0013 1083.10 0.0008 100 29.32 0.00 0.00 0.0000 1083.10 0.0000

150 19.45 0.18 0.08 0.0009 718.69 0.0005 150 19.45 0.00 0.00 0.0000 718.69 0.0000

200 13.97 0.13 0.06 0.0006 516.25 0.0004 200 13.97 0.00 0.00 0.0000 516.25 0.0000

250 10.61 0.10 0.04 0.0005 391.81 0.0003 250 10.61 0.00 0.00 0.0000 391.81 0.0000

500 4.18 0.04 0.02 0.0002 154.56 0.0001 500 4.18 0.00 0.00 0.0000 154.56 0.0000

1000 1.58 0.01 0.01 0.0001 58.40 4.4E-05 1000 1.58 0.00 0.00 0.0000 58.40 0.0000

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 74.30 0.00 0.00 0.0000 2744.96 0.0000 20 0.70 0.30 0.0034 0.0021

30 64.57 0.00 0.00 0.0000 2385.45 0.0000 30 0.61 0.26 0.0030 0.0018

40 56.52 0.00 0.00 0.0000 2088.05 0.0000 40 0.53 0.23 0.0026 0.0016

50 49.84 0.00 0.00 0.0000 1841.40 0.0000 50 0.47 0.20 0.0023 0.0014

60 44.27 0.00 0.00 0.0000 1635.59 0.0000 60 0.42 0.18 0.0020 0.0012

80 35.62 0.00 0.00 0.0000 1315.96 0.0000 80 0.34 0.14 0.0016 0.0010

100 29.32 0.00 0.00 0.0000 1083.10 0.0000 100 0.28 0.12 0.0013 0.0008

150 19.45 0.00 0.00 0.0000 718.69 0.0000 150 0.18 0.08 0.0009 0.0005

200 13.97 0.00 0.00 0.0000 516.25 0.0000 200 0.13 0.06 0.0006 0.0004

250 10.61 0.00 0.00 0.0000 391.81 0.0000 250 0.10 0.04 0.0005 0.0003

500 4.18 0.00 0.00 0.0000 154.56 0.0000 500 0.04 0.02 0.0002 0.0001

1000 1.58 0.00 0.00 0.0000 58.40 0.0000 1000 0.01 0.01 0.0001 4.4E-05

D-200
Facility G-03 - 41% Perc, 55% MeCl

Met Set: Default-0

41% Perc 55% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0.0259 op hrs/wk: 57 Acu Rate [g/s]: 0.0347

Ann Rate [g/s]: 0.0027 Ann Rate [g/s]: 0.0036

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.30 1.18 0.50 0.0057 2744.96 0.0036 20 74.30 0.27 0.11 0.0007 2744.96 0.0068

30 64.57 1.03 0.44 0.0050 2385.45 0.0031 30 64.57 0.23 0.10 0.0006 2385.45 0.0059

40 56.52 0.90 0.38 0.0044 2088.05 0.0027 40 56.52 0.20 0.09 0.0005 2088.05 0.0052

50 49.84 0.79 0.34 0.0038 1841.40 0.0024 50 49.84 0.18 0.08 0.0004 1841.40 0.0046

60 44.27 0.71 0.30 0.0034 1635.59 0.0021 60 44.27 0.16 0.07 0.0004 1635.59 0.0041

80 35.62 0.57 0.24 0.0027 1315.96 0.0017 80 35.62 0.13 0.05 0.0003 1315.96 0.0033

100 29.32 0.47 0.20 0.0023 1083.10 0.0014 100 29.32 0.11 0.04 0.0003 1083.10 0.0027

150 19.45 0.31 0.13 0.0015 718.69 0.0009 150 19.45 0.07 0.03 0.0002 718.69 0.0018

200 13.97 0.22 0.09 0.0011 516.25 0.0007 200 13.97 0.05 0.02 0.0001 516.25 0.0013

250 10.61 0.17 0.07 0.0008 391.81 0.0005 250 10.61 0.04 0.02 0.0001 391.81 0.0010

500 4.18 0.07 0.03 0.0003 154.56 2.0E-04 500 4.18 0.02 0.01 3.8E-05 154.56 0.0004

1000 1.58 0.03 0.01 1.2E-04 58.40 7.6E-05 1000 1.58 0.01 0.00 1.4E-05 58.40 0.0001

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 74.30 0.00 0.00 0.0000 2744.96 0.0000 20 1.45 0.62 0.0064 0.0104

30 64.57 0.00 0.00 0.0000 2385.45 0.0000 30 1.26 0.54 0.0056 0.0090

40 56.52 0.00 0.00 0.0000 2088.05 0.0000 40 1.10 0.47 0.0049 0.0079

50 49.84 0.00 0.00 0.0000 1841.40 0.0000 50 0.97 0.41 0.0043 0.0069

60 44.27 0.00 0.00 0.0000 1635.59 0.0000 60 0.86 0.37 0.0038 0.0062

80 35.62 0.00 0.00 0.0000 1315.96 0.0000 80 0.70 0.30 0.0031 0.0050

100 29.32 0.00 0.00 0.0000 1083.10 0.0000 100 0.57 0.24 0.0025 0.0041

150 19.45 0.00 0.00 0.0000 718.69 0.0000 150 0.38 0.16 0.0017 0.0027

200 13.97 0.00 0.00 0.0000 516.25 0.0000 200 0.27 0.12 0.0012 0.0019

250 10.61 0.00 0.00 0.0000 391.81 0.0000 250 0.21 0.09 0.0009 0.0015

500 4.18 0.00 0.00 0.0000 154.56 0.0000 500 0.08 0.03 0.0004 5.8E-04

1000 1.58 0.00 0.00 0.0000 58.40 0.0000 1000 0.03 0.01 1.4E-04 2.2E-04

D-201
Facility G-03 - 46% MeCl

Met Set: Default-0

0% Perc 46% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0.0290

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0.0030

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.30 0.00 0.00 0.0000 2744.96 0.0000 20 74.30 0.22 0.09 0.0001 2744.96 0.0057

30 64.57 0.00 0.00 0.0000 2385.45 0.0000 30 64.57 0.19 0.08 0.0001 2385.45 0.0049

40 56.52 0.00 0.00 0.0000 2088.05 0.0000 40 56.52 0.17 0.07 0.0001 2088.05 0.0043

50 49.84 0.00 0.00 0.0000 1841.40 0.0000 50 49.84 0.15 0.06 0.0000 1841.40 0.0038

60 44.27 0.00 0.00 0.0000 1635.59 0.0000 60 44.27 0.13 0.06 0.0000 1635.59 0.0034

80 35.62 0.00 0.00 0.0000 1315.96 0.0000 80 35.62 0.11 0.05 3.6E-05 1315.96 0.0027

100 29.32 0.00 0.00 0.0000 1083.10 0.0000 100 29.32 0.09 0.04 2.9E-05 1083.10 0.0022

150 19.45 0.00 0.00 0.0000 718.69 0.0000 150 19.45 0.06 0.02 1.9E-05 718.69 0.0015

200 13.97 0.00 0.00 0.0000 516.25 0.0000 200 13.97 0.04 0.02 1.4E-05 516.25 0.0011

250 10.61 0.00 0.00 0.0000 391.81 0.0000 250 10.61 0.03 0.01 1.1E-05 391.81 0.0008

500 4.18 0.00 0.00 0.0000 154.56 0.0000 500 4.18 0.01 0.01 4.2E-06 154.56 0.0003

1000 1.58 0.00 0.00 0.0000 58.40 0.0000 1000 1.58 0.00 0.00 1.6E-06 58.40 0.0001

0% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 74.30 0.00 0.00 0.0000 2744.96 0.0000 20 0.22 0.09 0.0001 0.0057

30 64.57 0.00 0.00 0.0000 2385.45 0.0000 30 0.19 0.08 0.0001 0.0049

40 56.52 0.00 0.00 0.0000 2088.05 0.0000 40 0.17 0.07 0.0001 0.0043

50 49.84 0.00 0.00 0.0000 1841.40 0.0000 50 0.15 0.06 4.98E-05 0.0038

60 44.27 0.00 0.00 0.0000 1635.59 0.0000 60 0.13 0.06 4.43E-05 0.0034

80 35.62 0.00 0.00 0.0000 1315.96 0.0000 80 0.11 0.05 3.6E-05 0.0027

100 29.32 0.00 0.00 0.0000 1083.10 0.0000 100 0.09 0.04 2.9E-05 0.0022

150 19.45 0.00 0.00 0.0000 718.69 0.0000 150 0.06 0.02 1.9E-05 0.0015

200 13.97 0.00 0.00 0.0000 516.25 0.0000 200 0.04 0.02 1.4E-05 0.0011

250 10.61 0.00 0.00 0.0000 391.81 0.0000 250 0.03 0.01 1.1E-05 0.0008

500 4.18 0.00 0.00 0.0000 154.56 0.0000 500 0.01 0.01 4.2E-06 0.0003

1000 1.58 0.00 0.00 0.0000 58.40 0.0000 1000 0.00 0.00 1.6E-06 0.0001

D-202
Facility G-03 - 97% TCE

Met Set: Default-0

0% Perc 0% MeCl

op hrs/wk: 57 Acu Rate [g/s]: 0 op hrs/wk: 57 Acu Rate [g/s]: 0

Ann Rate [g/s]: 0 Ann Rate [g/s]: 0

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute

20 74.30 0.00 0.00 0.0000 2744.96 0.0000 20 74.30 0.00 0.00 0.0000 2744.96 0.0000

30 64.57 0.00 0.00 0.0000 2385.45 0.0000 30 64.57 0.00 0.00 0.0000 2385.45 0.0000

40 56.52 0.00 0.00 0.0000 2088.05 0.0000 40 56.52 0.00 0.00 0.0000 2088.05 0.0000

50 49.84 0.00 0.00 0.0000 1841.40 0.0000 50 49.84 0.00 0.00 0.0000 1841.40 0.0000

60 44.27 0.00 0.00 0.0000 1635.59 0.0000 60 44.27 0.00 0.00 0.0000 1635.59 0.0000

80 35.62 0.00 0.00 0.0000 1315.96 0.0000 80 35.62 0.00 0.00 0.0000 1315.96 0.0000

100 29.32 0.00 0.00 0.0000 1083.10 0.0000 100 29.32 0.00 0.00 0.0000 1083.10 0.0000

150 19.45 0.00 0.00 0.0000 718.69 0.0000 150 19.45 0.00 0.00 0.0000 718.69 0.0000

200 13.97 0.00 0.00 0.0000 516.25 0.0000 200 13.97 0.00 0.00 0.0000 516.25 0.0000

250 10.61 0.00 0.00 0.0000 391.81 0.0000 250 10.61 0.00 0.00 0.0000 391.81 0.0000

500 4.18 0.00 0.00 0.0000 154.56 0.0000 500 4.18 0.00 0.00 0.0000 154.56 0.0000

1000 1.58 0.00 0.00 0.0000 58.40 0.0000 1000 1.58 0.00 0.00 0.0000 58.40 0.0000

97% TCE Total Health Impacts

op hrs/wk: 57 Acu Rate [g/s]: 0.0612

Ann Rate [g/s]: 0.0064

Distance [m] ISC Ann Emis. Cancer Risk [x/million] Harzard Index ISC Acute Emis Hazard Index Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope [ug/m^3] Resident Worker Chronic [ug/m^3] Acute Envelope Resident Worker Chronic Acute

20 74.30 0.95 0.40 0.0007 2744.96 0.0000 20 0.95 0.40 0.0007 0.0000

30 64.57 0.83 0.35 0.0006 2385.45 0.0000 30 0.83 0.35 0.0006 0.0000

40 56.52 0.72 0.31 0.0006 2088.05 0.0000 40 0.72 0.31 0.0006 0.0000

50 49.84 0.64 0.27 0.0005 1841.40 0.0000 50 0.64 0.27 0.0005 0.0000

60 44.27 0.57 0.24 0.0004 1635.59 0.0000 60 0.57 0.24 0.0004 0.0000

80 35.62 0.46 0.19 0.0004 1315.96 0.0000 80 0.46 0.19 0.0004 0.0000

100 29.32 0.38 0.16 0.0003 1083.10 0.0000 100 0.38 0.16 0.0003 0.0000

150 19.45 0.25 0.11 0.0002 718.69 0.0000 150 0.25 0.11 0.0002 0.0000

200 13.97 0.18 0.08 0.0001 516.25 0.0000 200 0.18 0.08 0.0001 0.0000

250 10.61 0.14 0.06 0.0001 391.81 0.0000 250 0.14 0.06 0.0001 0.0000

500 4.18 0.05 0.02 4.2E-05 154.56 0.0000 500 0.05 0.02 4.2E-05 0.0000

1000 1.58 0.02 0.01 1.6E-05 58.40 0.0000 1000 0.02 0.01 1.6E-05 0.0000

D-203
Averaged Multicomponent Health Impacts from General Degreasers for Facility G-03

Weightings: 1 24% Perc 5.3%

2 41% Perc/55% MeCl 1.1%

3 46% MeCl 7.2%

4 97% TCE 86.0%

Total Health Impacts

Distance [m] Cancer Risk [x/million] Harzard Index Hazard Index

Envelope Resident Worker Chronic Acute

20 0.89 0.38 0.0009 0.0006

30 0.77 0.33 0.0008 0.0006

40 0.67 0.29 0.0007 0.0005

50 0.60 0.25 0.0006 0.0004

60 0.53 0.23 0.0005 0.0004

80 0.43 0.18 0.0004 0.0003

100 0.35 0.15 0.0004 0.0002

150 0.23 0.10 0.0002 0.0002

200 0.17 0.07 0.0002 0.0001

250 0.13 0.05 0.0001 0.0001

500 0.05 0.02 0.0001 3.6E-05

1000 0.02 0.01 1.9E-05 1.3E-05

D-204
D-205

E. Memorandum. Modeling of Perchloroethylene, Methylene Chloride, and

Trichloroethylene Emissions from Automotive Maintenance and Repair Facilities

(memo starts on the following page)
Winston H. Hickox

Agency Secretary

California Environmental Protection Agency

Printed on Recycled Paper

Air Resources Board

Alan C. Lloyd, Ph.D.

Chairman

2020 L Street • P.O. Box 2815 • Sacramento, California 95812 • www.arb.ca.gov

Gray Davis

Governor

MEMORANDUM

TO: Todd Wong, Manager

Emissions Evaluation Section

Stationary Source Division

FROM: Andrew Ranzieri, Manager

Modeling Support Section

Planning and Technical Support Division

DATE: January 11, 2000

SUBJECT: MODELING RESULTS FOR PERCHLOROETHYLENE (PERC),

METHYLENE CHLORIDE (MECI), AND TRICHLOROETHYLENE (TCE)

EMISSIONS FROM AUTOMOTIVE MAINTENANCE AND REPAIR

FACILITIES (AMR)

Perchloroethylene (Perc), methylene chloride (MeCl), and trichloroethylene (TCE) are

common constituents of automotive consumer products used for Automotive

Maintenance and Repair (AMR) activities. Per your request, refined air dispersion

modeling has been performed to estimate downwind concentrations from AMR facilities.

Specifically, this memo addresses the following requests:

1. Estimate the overall maximum hourly and overall maximum annual concentrations of

Perc, MeCl, and TCE attributable to specific AMR facilities;

2. Estimate the maximum hourly and maximum annual concentrations of Perc, MeCl,

and TCE attributable to specific AMR facilities experienced by the nearest business

receptor (NBR), nearest residential receptor (NRR), maximum exposed individual

worker (MEIW), and maximum exposed individual resident (MEIR);

3. Estimate the population exposure to Perc, MeCl, and TCE concentrations attributable

to specific AMR facilities; and

4. Estimate the range of hourly and annual Perc, MeCl, and TCE concentrations that

might result from the individual operation of three hypothetical, generic facilities in

several locations throughout the State of California.
Todd Wong

January 11, 2000

Page 2

Your staff provided information on thirteen specific facilities. This information is based

on site visits that your staff performed. In addition, your staff provided information on

three generic facilities that were designed to broadly represent the range of facilities that

are in operation in California. Generic facilities are labeled G-01, G-02, and G-03.

Table 1A provides the coordinates and general location of each specific facility while

Table 1B gives the dimensions and operating schedule for each specific facility. Aboveambient, hourly and annual concentration estimates are provided at locations

surrounding each of the facilities. This refined modeling is an enhancement to the

screening analyses performed by your staff using the SCREEN3 dispersion model.

Discussion of Model Application

The ISCST3 (Version 97363) air dispersion model was utilized in this project. The

model estimates concentrations at specified receptor locations around each facility,

directly caused by each facility’s emissions. The receptors can be defined as individual

locations, a gridded network of locations (defined by a number of rows and columns), or

a polar network of locations (defined by a number of points along multiple radials,

separated by an angular distance). Table 2 provides a description of the receptor

networks used in this analysis. The closest receptor utilized for specific facility modeling

is approximately 32 meters from the centroid of the source. Concentrations closer than

32 meters to the source centroid could be higher. This distance was selected based

upon the size of the largest of the thirteen facilities to eliminate the chance of receptors

falling inside the perimeter of each facility. In addition, discrete receptors were used to

identify businesses and residences located nearby each of the facilities by your staff.

These receptors are discussed in more detail later. Your staff requested the specific

polar distances used for generic facility modeling. These distances are provided in the

footnotes of Table 2.

The ISCST model assumes that emissions are totally inert. That is, there are no

chemical reactions involving the emissions that occur between the source and receptor.

In addition, the modeling options selected for this project are based on the assumption

that pollutant deposition, where emissions can fall-out or deposit on the ground or other

surfaces, does not occur. These assumptions keep the total mass of facility-specific

Perc, MeCl, and TCE emissions constant, which implies a linear relationship between

the magnitude of the brake cleaner emissions and the associated concentration at each

receptor.

Facility-wide Perc, MeCl, and TCE emissions of 1 gram per second was used. This is

referred to as a unit emission rate, which produces corresponding unit concentrations at

all modeled receptors. Coupled with the use of a unit emission rate, the linear

relationship between emissions released at the source and the directly related
Todd Wong

January 11, 2000

Page 3

concentrations at receptors surrounding the source allows the effects of multiple facility

emission magnitudes to be determined directly. This is done by multiplying the unit

concentration estimated at any receptor (using unit emissions) by the specific emission

rate for each scenario. Reporting unit concentration results was determined to be most

beneficial because a single set of modeling results can be utilized by your staff to

estimate the effects of multiple emission-rate scenarios. Thus, your staff must

adjust all the concentration estimates reported in this document using facility-specific

emissions scenarios in the following manner:

(1) 















=





















×















Concentration

Scenario

Rate

Emission

Scenario

Concentration

Unit

There are a number of plausible routes through which emissions can exit a facility. Site

visits and surveys indicate that AMR facilities can have a variety of different ventilation

systems, including forced-air systems, passive vents, and fans as well as open doors

and windows. However, it is assumed that service bay doors are the overwhelming

avenues by which Perc, MeCl, and TCE emissions mix with outdoor air. There are

several reasons for this assumption. Most notable is that service bay doors are usually

left open. This practice is due to both the comfortable California climate and the

practicality of leaving the doors open to allow entrance and exit of automobiles. Also,

doors are typically left open because closed doors give the appearance that the facility

is closed. Service bay doors are typically the car-width, roll-up variety and, as such,

provide a large exit area once they are opened. With respect to facility design, there is

a desire to maximize the number of service bays per facility, and, as such, service bay

doors typically account for the greatest surface area along the front and/or back of a

facility.

When Perc, MeCl, and TCE emissions immediately leave the facility from the service

bay door openings, building-induced wind flow and turbulence patterns affect the

dispersion of the emissions as the Perc, MeCl, and TCE mixes with the outside air

passing by the structure. The effects on the air flowing immediately around the building

are caused by higher pressure at the windward side of the building and lower pressure

at the leeward side of the building. The magnitude of these effects is a function of wind

speed, building dimensions and building orientation.

Based on the processes described above, the facilities were modeled as ISCST3

volume sources using the facility dimensions provided by your staff. Minor adjustments

were made to the facility dimensions that were provided in order to adhere to the input

requirements of the model. That is, the ISCST3 model is designed to simulate the
Todd Wong

January 11, 2000

Page 4

dispersion of volume source emissions using volume sources having a square base

(i.e., equal length and width). As a result, rectangular buildings, like most of the

facilities modeled, are simulated as a series of adjacent volume sources, each having a

square foot print. Only two of the facilities modeled are simulated using one volume

source (facilities A-28 and O). In addition, the ISCST3 model simulates volume sources

as virtual point sources. The details of this methodology are provided in the ISC3

documentation and require three basic input parameters: an initial lateral dimension

(sigma x), an initial vertical dimension (sigma y), and the effective release height. The

sigma inputs are based on the height of the volume source and the length of each side

of each square volume source. To be consistent with initial modeling analyses, the

effective emission plume release height is assumed to be half of the building height.

Table 3 provides the ISCST3 volume source input parameters used.

Due to the assumptions made about the reactivity and deposition of emissions (i.e.,

none of either), concentrations attributable to each facility are assumed to be dependent

solely on the dispersion of facility emissions by the effects of meteorological

parameters. The terrain is assumed to be urban, and, as such, urban dispersion

coefficients are applied. It should be noted that this analysis does not account for

regional, background concentrations or overlapping plumes of Perc, MeCl, and TCE

from other sources that could impact any of the receptors modeled.

Description of Meteorological Data Used

At a fixed geographical location, measured meteorological parameters are expected to

fall within historical ranges and to follow a regular, annual pattern with some year-toyear variability. As a result of this consistency, meteorological data that are collected

using EPA approved procedures at a specific location can be used in modeling

analyses to represent meteorological conditions that are likely to be experienced at the

same location in the future. It is also acceptable to utilize off-site meteorological data

that are representative of the conditions at the site of analysis (where

representativeness is based on specific EPA guidelines).

Site-specific meteorological data are not available for any of the specific AMR facilities.

Therefore, representative, off-site meteorological data were used. Also, since a few of

the thirteen facilities are located in the same general geographical area, some of the

thirteen facilities are represented by the same meteorological data. As a result,

modeling for the thirteen facilities utilizes ten different off-site meteorological data

collection sites, each of which are representative of the meteorological conditions

experienced at one or more facilities. To account for year-to-year variability in

meteorological conditions experienced in a region, multiple years of meteorological data

were used, where available. In total, forty-five meteorological data sets were used,
Todd Wong

January 11, 2000

Page 5

comprised of one to six years of data per each of the ten meteorological sites. Only one

year of meteorological data were available for facility U while three to six years of data

were used for the remaining facilities.

Table 4 lists the representative meteorological data that were used for each of the

thirteen specific facilities. Each generic facility was modeled using all of the specific

facility meteorological data sets (i.e., all forty-five meteorological data sets). This was

done to broadly assess the level of pollutant concentrations that could be associated

with different sizes of service facilities located in the different regions around the state

that are represented by the ten different meteorological data collection sites. In addition

to using all of the specific facility meteorological data, each generic facility was modeled

with default meteorological data (i.e., default meteorological data from the SCREEN

model). Three default data sets were used, corresponding to wind directions of 0, 45,

and 90 degrees- where zero degrees corresponds to the radial parallel to the longest

side of each facility and would yield the highest modeled concentrations.

Method for Determination of Hourly Concentrations

One purpose of this analysis is to determine the maximum hourly concentration that

might be experienced in the area surrounding an AMR facility. Using the ISCST3 model

this is determined with facility-specific inputs such as the facility emissions rate, the

hourly operating schedule, and the range of observed meteorological conditions that

have historically occurred during each facility’s hours of operation. As mentioned

earlier, this analysis assumes the facility emission rate to be 1 gram/second (unit

emission rate).

All of the facilities modeled in this project operate on a consistent weekly schedule,

comprised of a combination of the hour-of-day that a facility is open (i.e., 12AM-12PM)

per each day-of-week (i.e., Monday-Sunday). All of the schedules were similar in that

each AMR facility operates on a fixed weekday operating schedule (e.g., 9AM-5PM,

Monday through Friday) where the weekend hours fall within the scheduled weekday

hours (e.g., 10AM-2PM, Saturday).

An important concept in selecting proper meteorological data inputs for worst-case

modeling analyses is that meteorological conditions measured on Saturday at 9AM

during year ‘X’ could occur some other year on any day of the week at 9AM. Thus, if an

AMR facility is open for business every Saturday at 9AM, then all meteorological

conditions historically experienced during that hour of the day, not day of the week,

must be considered to estimate the maximum hourly concentration. With this concept in

mind, each annual, 24-hour-per-day meteorological data set can be considered to

consist of 24 separate data sets (i.e., one per hour of the day, military time). Each of
Todd Wong

January 11, 2000

Page 6

these 24 fixed-hour data sets represents the range of meteorological conditions that

have occurred during the same hour of the day for the entire year.

Hourly concentrations were estimated by the ISCST3 model using all of the

meteorological conditions that were measured during any hour-of-day that is specified in

the operating schedules provided by your staff, irrespective of the day of the week.

Since all of the facilities have weekend hours of operation that are a subset of the

weekday hours of operation, meteorological data coincident with the Monday through

Friday operating hours-of-day were used. For example, a facility might operate Monday

through Friday from 9AM to 5PM and on Saturday from 9AM to 2PM (45 hours per

week). For this facility, hourly concentrations were estimated by the ISCST3 using

meteorological conditions measured any day of the year from 9AM to 5PM (56 hours

per week, 52 weeks per year) for all the years of meteorological data available.

Method for Determination of Annual Concentrations

Another purpose of this analysis is to determine the maximum annual concentration that

might be experienced in the area surrounding a facility. The ISCST model calculates

long-term, annual concentrations by averaging all the hourly concentrations determined

at each receptor over the year represented by the meteorological data input file. This

includes concentrations calculated when the facility is not operating (i.e., null hourly

concentrations). Thus, the model averages all of the hourly concentration estimates

described in the previous section (Determination of Hourly Concentrations) over all

hours of the year. For example, a facility that operates Monday through Friday from

9AM to 5PM and on Saturday from 9AM to 2PM is open 45 hours per week. For this

facility, 2340 hourly average concentrations per receptor should be considered in

calculating the average concentration per non leap year (45 hours-per-week, 52 weeks

per year). However, to account for all possible hourly meteorological conditions

associated with each hour of facility operation, more hourly concentrations are

calculated than correspond to each facility’s operating schedule (described in the

previous paragraph). That is, using the above example facility, 56 hours per week are

modeled rather than 45 hours per week. This results in 9 additional hourly

concentrations per week, which are used in calculating the annual average. Thus, the

annual average concentrations determined by the model are overestimated. To

alleviate overestimation of the annual average concentration estimates, the annual

average concentrations calculated by the model were adjusted using a factor of

scheduled hours per week over the modeled hours per week. For the example facility

used above this reduction factor is 0.804, which is equal to 45 operating hours divided

by 56 modeled hours. This adjustment method assumes that the 9 additional

concentrations per week fall within the weekly average concentrations associated with

the specific 45 hour-per-week operating schedule. Table 5 provides the annual
Todd Wong

January 11, 2000

Page 7

adjustment factors used for each facility. All of the annual concentration estimates

provided in this memo have already been adjusted by these factors.

Modeling Results for Specific Facilities

Grid-Based Receptor Network Results

For each hour of meteorological data used, hourly concentrations specific to a facility’s

emissions were estimated at each receptor in a gridded network surrounding each of

the specific facilities. The utilized receptor networks are described in Table 2.

Receptors representing discrete, off-site residences or businesses that might be located

in-between the equally spaced, gridded receptors were modeled separately (these

results are described in the following section). As described in the previous sections and

in Table 4, hourly meteorological conditions from 1 to 6 annual meteorological data sets

were used per facility.

For each facility and for each year of meteorological data used, the maximum hourly

and maximum annual concentrations were determined out of all of the hourly and

annual concentrations estimated to occur at any of the receptors in the gridded receptor

network. Thus, 1 to 6 maximum hourly concentrations and 1 to 6 maximum annual

concentrations were determined per site (i.e., one maximum hourly and one maximum

annual concentration per year of meteorological data). Tables 6A and 6B summarize

the high, average, and low statistics for the 1 to 6 maximum annual concentrations and

1 to 6 maximum hourly concentrations, respectively, determined for each site. For

example, if five years of meteorological data were available for a facility, modeling might

result in maximum, annual-average concentration estimates of 10, 12, 14, 16 and 18

micrograms per cubic meter. In this case, the high would be 18, the low would be 10,

and the average would be 14. Tables 6A and 6B also present the range of distance and

direction at which the maximum values occur, since the maximum concentrations could

occur at different receptors, depending on the corresponding meteorological conditions

that produced each maximum. It should be noted again that facility emissions were

limited to each facility’s hours of operation (Table 1) and modeling was limited to

distances greater than 32 meters from the centroid of each source.

Discrete Receptor Results (Nearest Residence/Business Off-Site Receptor

The locations of the nearest business receptor (NBR), nearest residential receptor

(NRR), maximum exposed individual worker (MEIW), and maximum exposed individual

resident (MEIR) were determined by your staff. Concentrations at these locations were

modeled separately as discrete receptors (i.e., stand-alone points on a map). If the

distance from the source centroid to the discrete NBR, NRR, MEIW, or MEIR receptor
Todd Wong

January 11, 2000

Page 8

was determined to be closer than 32 meters, the concentration at 32 meters in the

equivalent direction is reported in lieu of the concentration estimated at the discrete

business or residential receptor. This was done to stay consistent with the 32-meter,

minimum-modeled distance implemented for the receptor network modeling of specific

facilities (covered in the previous section). In order to produce these supplemental data

points, concentrations were calculated for a polar network of receptors. This polar

network consists of 60 receptors where each receptor is spaced 6 degrees apart and

located 32 meters from the source centroid.

Your staff determined the locations of the NBR and NRR during site visits. These

receptors represent the nearest business and residence to each of the facilities. At

each receptor, a maximum hourly concentration and a maximum annual concentration

was calculated using each of the one to six years of meteorological data associated with

each specific facility (Table 4). The high, low, and average of these one to six values

for the NBR and NRR are provided in Tables 7A and 7B.

The locations of potential MEIW and MEIR receptors were determined by your staff

using modeling results for the gridded receptor networks, described in the previous

section and identified in Table 2. To estimate the location of potential MEIW and MEIR

receptors, your staff utilized plots of modeled concentrations overlaid onto street maps

as well as sketches of the residences and businesses in the region surrounding each

facility. The sketches were made during site visits. Concentrations at all of the potential

MEIW and MEIR locations were modeled as discrete receptors. The business receptor

having the highest modeled concentration among all of the identified business receptors

delineates it as the maximum exposed individual worker (MEIW). Similarly, the

residential receptor having the highest modeled concentration among all of the identified

residential receptors delineates that receptor as the maximum exposed individual

resident (MEIR). Tables 7C and 7D present the facility-specific annual and hourly

concentrations, respectively, at the MEIW and MEIR.

Regional Population Impact Results for Specific Facilities

Assessing the impact of source-specific emissions on the population surrounding a

source consists of analyzing model-estimated concentrations that have been spatially

paired to population estimates. In order to perform this type of analysis, concentration

data and population data must be processed to represent the same grid-cell in a

gridded network of areas surrounding a facility in one of the following four ways:

1. No processing is required if both forms of data have the same spatial resolution and

the existing resolution is sufficient for analyses;
Todd Wong

January 11, 2000

Page 9

2. Concentration data may be processed to match the spatial resolution of the

population data;

3. Population data may be processed to match the spatial resolution of the

concentration data; or

4. Both the concentration data and population data are processed to another, third

spatial resolution.

In this analysis, processing option number four was used. Population data from the

California Department of Finance (CDF) was used. Specifically, the utilized CDF data is

census tract population data for 1990, projected to 1997 using CDF growth factors.

Based on previous analyses, the population data were spatially re-allocated from

representing census tract populations surrounding each of the facilities to representing

populations in 1-kilometer by 1-kilometer areas (square grid-cells) surrounding each

facility. In processing the population data, the centroid of each grid-cell was assigned to

be coincident with a coarse network modeling receptor (Table 2).

Perc, MeCl, and TCE unit concentration data from the modeling analyses were

processed to match the 1-kilometer by 1-kilometer grid-cell resolution of the population

data. The average of the modeled concentrations for receptors spaced 100 meters

apart (Table 2) was used as a representative concentration for each of the nine central

1-kilometer by 1-kilometer grid cells surrounding a facility. Otherwise, the modeled

concentrations for receptors spaced 1-kilometer apart were used (Table 2). The reason

for using an average concentration is that the modeling analyses presented in the

previous section shows that high concentration gradients occur within 100 meters from

a facility and, lower, more uniform concentrations are expected to occur at distances

beyond 100 meters. A potential drawback to averaging concentrations in the central,

grid-cell that contains the AMR facility is that it could underestimate near-source

population exposure. That is, all of the 100-meter-spaced receptor concentrations in

this grid cell have the same weight in determining the average 1-kilometer by 1-

kilometer grid cell concentration. Because there are more receptors beyond 100 meters

than inside of 100 meters, the average of all of the receptor concentrations in this grid

cell is significantly lower than modeled concentrations within 100 meters from the

facility. As a result, the average concentrations within the center 1-kilometer by 1-

kilometer grid cell underestimates exposure to Perc, MeCl, or TCE for the population

that might be located coincident with high concentration gradients (i.e., generally

located within 100 meters from an AMR facility). To account for this, the maximummodeled concentration should be considered as an upper bound of exposure within the

central grid cell.
Todd Wong

January 11, 2000

Page 10

After concentration and population data are processed to represent grid-cell areas in the

same grid system, concentration thresholds are used to stratify the matched

population/km2 and concentration (ug/m3) data values. Tables 8A through 8M present

the cumulative population exposure for the 31-kilometer by 31-kilometer area

surrounding each specific facility. These tables show the number of people estimated

to be exposed to a specific annual concentration up to the maximum concentration

provided in Tables 6 and 7, exclusively from each facility and based on a unit emission

rate. For example, Table 8A represents cumulative population exposure for facility A07, which was modeled using Oakland meteorological data (see Table 4). Table 8A

shows that unit emissions from facility A-07 that are under the influence of Oakland

1960 meteorological conditions cause up to 132,661 people to be exposed to Perc,

MeCl, and TCE concentrations that can range between 0.09 and 113.00 micrograms

per cubic meter. The maximum concentration is considered to account for the effects of

averaging 100-meter-spaced receptor concentrations over areas expected to

experience a high concentration gradient (this is discussed in the paragraph above).

Each table provides an average for the multiple years of data in the last column.

Modeling Results for Generic Facilities

Descriptions of generic facilities are found in Table 1B and in Table 3. Tables 9A and

9B summarize the generic facility modeling results. Appendix A contains more detailed

tables of the maximum concentration per indicated distance for each default

meteorological condition and specific facility meteorological site. Summary statistics of

maximum values per distance (average, high, and low) are tabulated in the last three

columns of Appendix A tables, where the summary values used in Tables 9A and 9B

are indicated with boxed borders.

Each generic facility was modeled using meteorological data for all 10 sites that were

used in specific facility modeling (Table 4). For modeling with these 45 meteorological

data sets, a 360-degree polar receptor grid is utilized where angular distances of 6

degrees separate each radial. Each radial has receptors located between 20 meters

and 1000 meters from the source centroid.

As indicated in the first three columns in each of the tables in Appendix A, each table

contains hourly or annual modeling results for one of the generic facilities at specified

distances. All distances are from the facility center, except for default meteorology

(DFLT_00, DFLT_45, and DFLT_90), which is discussed in the paragraph below. Each

record, or line, in each of the tables in Appendix A presents a single hourly or annual

concentration for each of the ten meteorological data sets (BUR, CND, FAT, LAX, MCC,

MHR, OAK, RED, SAC, and STN071) estimated to occur at the specified distance from

the facility centroid. In the last three columns of each line the high, low, and average of
Todd Wong

January 11, 2000

Page 11

these ten values is provided. For example, one model run was made for facility G-03

per year of Oakland (OAK) meteorological data (1960, 1961, 1962, 1963, and 1964).

Each of these five model runs resulted in one hourly maximum and one annual

maximum concentration per distance from the source centroid. Among the five

maximum hourly concentrations modeled for facility G-03 using the five different years

of Oakland meteorological data, the overall maximum hourly value is 1716 ug/m3 and

occurs 20 meters from the center of the facility using 1964 OAK data. Similarly the

maximum annual value is 47 ug/m3, which occurs 30 meters from the center of the

facility using 1962 OAK data. These two concentration values are underlined in the

Appendix A tables (without a reference to the associated year of meteorological data).

This same process was performed for the remaining 9 meteorological sites, resulting in

10 overall maximum hourly and 10 overall maximum annual values per generic facility

and per distance. Tables 9A and 9B provide the ‘high’, ‘low’, and ‘average’ of the 10

overall maximum hourly (i.e., any distance) and 10 overall maximum annual values for

each generic facility. These values are found boxed in the Appendix tables as well.

Because generic facility modeling included concentration estimates down to 20 meters

from the facility centroid, it should be noted that none of the maximum concentrations

for any facility, distance, or met year were found to fall within the building footprint.

In applying the 45 meteorological data sets to the generic facilities, each generic facility

was oriented with the building length along the East-West direction (i.e., x-axis). Thus,

concentrations could be higher in situations where the length of the building, as

modeled, is not oriented parallel with the prevailing wind direction for each

meteorological data set. This is the orientation known to result in maximum

concentrations. To gain some understanding as to the variability that might occur from

building orientation effects, default meteorological conditions were applied to the

generic facilities using three building length orientations: parallel to the wind direction

(DFLT_00); 45 degrees to the wind (DFLT_45); and perpendicular to the wind direction

(DFLT_90). Maximum concentrations were found to vary by ten percent for facility G01, fifteen percent for facility G-02, and forty percent for facility G-03. The range in

variability is dependent upon the facility dimensions.

In closing, it should be noted that all concentrations presented in this memo are

concentration estimates above background concentrations. Also, the presented

analyses give no consideration to background Perc, MeCl, and TCE concentrations or

overlapping plumes of these substances from multiple nearby sources simultaneously

utilizing Perc, MeCl, and TCE-based products. The overlapping plume case is plausible

with specific facilities A-7 and A-8, for example.

Enclosures
TABLES
TABLE 1. Description of Automotive Maintenance and Repair Facilities.

A. Facility Locations.

ID General Location UTM Zone UTM East

(m)

UTM North

(m)

A-07 Oakland 10 565380 4186595

A-08 Oakland 10 565363 4186618

A-09 Berkeley 10 562308 4191508

A-28 Sacramento 10 636751 4276869

A-52 Marina Del Rey 11 366347 3761855

A-83 Redding 10 553940 4491121

A-86 Fresno 10 786709 4079569

A-92 Fresno 10 788131 4075093

I Sacramento 10 636216 4268553

O Walnut Creek 10 582393 4197375

P Sacramento 10 642904 4267713

T Glendale 11 384374 3776603

U Garden Grove 11 414841 3736229

B. Dimensions and Operating Parameters.

ID L (m) W (m) H (m)

Number

of

Hrs/Wk

Hours

Of

Operation

Days

of

Operation

A-07 30.5 10.7 4.6 58 8.0a- 6.0p

8.0a- 4.0p

M-F

Sat

A-08 22.9 9.1 4.6 59 8.0a- 6.0p

8.0a- 5.0p

M-F

Sat

A-09 21.3 13.7 7.6 59 8.0a- 6.0p

8.0a- 5.0p

M-F

Sat

A-28 15.2 15.2 9.1 122.5 5.0a-10.5p M-Sun

A-52 15.2 7.6 4.6 51 8.0a- 5.0p

8.0a- 2.0p

M-F

Sat

A-83 24.4 9.1 6.1 53 8.0a- 5.0p

8.0a- 4.0p

M-F

Sat

A-86 53.3 33.5 10.0 60 7.0a- 6.0p

9.0a- 2.0p

M-F

Sat

A-92 15.2 7.6 5.2 47 7.5a- 4.0p

7.5a-12.0p

M-F

Sat

I 62.8 22.3 9.5 92.5 6.5a- 1.0a M-F

O 18.3 15.2 6.1 45 9.0a- 6.0p M-F

P 18.3 10.7 6.1 60 8.0a- 6.0p M-Sat

T 21.3 9.1 6.1 56.5 8.0a- 5.5p

8.0a- 5.0p

M-F

Sat

U 18.3 9.1 6.1 60 8.0a- 6.0p M-Sat

G-01* 12.2 7.6 4.9 57 8.0a- 6.0p

8.0a- 3.0p

M-F

Sat

G-02* 21.3 13.7 7.6 57 8.0a- 6.0p

8.0a- 3.0p

M-F

Sat

G-03* 62.5 21.3 7.6 57 8.0a- 6.0p

8.0a- 3.0p

M-F

Sat

* G-01, G-02, and G-03 are ‘generic’ facilities
TABLE 2. ISCST3 Receptor Networks Used for Non-Discrete Receptor Modeling

Facility

Type

Grid Name

(Type) Cell Size Number of Receptors Location

Specific COARSE

(Cartesian)

1000m X 1000m 31 X 31 = 961 Centered on

Source

Centroid

Specific FINE

(Cartesian)

100m X 100m 31 X 31 = 961 Centered on

Source

Centroid

Specific VFINE

(Cartesian)

20m X 20m 26 X 26 = 676 Centered on

Source

Centroid

Generic POLARa

(Polar)

Variable.

Depends on

distance from

source.

(360/6) X 36 = 2160 Centered on

Source

Centroid

The polar network consists of 60 radials, spaced 6 degrees apart, having receptors at the

following 36 distances (meters): 20, 30, 40, 50, 60, 70, 80, 90, 100, 120, 140, 150, 160, 180, 200,

250, 300, 350, 400, 450, 500, 600, 700, 800, 900, 1000, 2000, 3000, 4000, 5000, 6000, 7000,

8000, 9000, 10000, and 23000.

TABLE 3. ISCST3 Volume Source Input Parameters.

Facility Parameters

MEASURED

(Entire Facility)

Facility Parameters

USED IN MODELING

(Per volume source)

Dispersion Parameters

USED IN MODELING

(Per volume source)

IDa L

 (m)

W

(m)

H

(m)

Hrs

Per

Wk

# of

L X L

Volumes

L

 (m)

H

(m)

Hrs

Per

Wk

Sigma

-

Y

Sigma

-

Z

Release

Heightb

(m)

A-07 30.5 10.7 4.6 58 3 10.0 4.6 70 4.7 2.1 2.3

A-08 22.9 9.1 4.6 59 3 8.4 4.6 70 3.9 2.1 2.3

A-09 21.3 13.7 7.6 59 2 12.2 7.6 70 5.7 3.5 3.8

A-28 15.2 15.2 9.1 122.5 1 15.2 9.1 122.5 3.5 4.3 4.5

A-52 15.2 7.6 4.6 51 2 7.6 4.6 63 3.5 2.1 2.3

A-83 24.4 9.1 6.1 53 3 9.1 6.1 63 4.3 2.8 3.0

A-86 53.3 33.5 10.0 60 2 30.0 10.0 77 14.0 4.7 5.0

A-92 15.2 7.6 5.2 47 2 7.6 5.2 63 3.5 2.4 2.6

I 62.8 22.3 9.5 92.5 3 21.3 9.5 133 9.9 4.4 4.7

O 18.3 15.2 6.1 45 1 15.2 6.1 63 3.7 2.8 3.0

P 18.3 10.7 6.1 60 2 9.8 6.1 70 4.5 2.8 3.0

T 21.3 9.1 6.1 56.5 2 9.1 6.1 70 4.2 2.8 3.0

U 18.3 9.1 6.1 60 2 9.1 6.1 70 4.3 2.8 3.0

G-01a

12.2 7.6 4.9 57 2 7.0 4.9 70 3.3 2.3 2.5

G-02a

21.3 13.7 7.6 57 2 13.0 7.6 70 6.1 3.5 3.8

G-03a

62.5 21.3 7.6 57 3 20.0 7.6 70 9.3 3.5 3.8

G-01, G-02, and G-03 are ‘generic’ facilities

Release height used in modeling is set to half of the building height.
TABLE 4. Meteorological Data Used for Refined Modeling (ISCST3).

Specific Facility ID

(13 Facilities)

Meteorological

Site Name

(10 Sites)

Meteorological

Site

Abbreviation

Number of Years

of Met Data

(45 Total)

Meteorological Data

Calendar Years Used

A-07, A-08, A09 Oakland OAK 5 ‘60-‘64

A-28 McClellan

AFB

MCC 5 ‘53-‘57

A-52 LAX LAX 5 ‘85-‘89

A-83 Redding RED 3 ‘87-‘89

A-86, A-92 Fresno FAT 5 ‘85-‘89

I Sac Exec. SAC 5 ‘87, ‘89-‘92

O Concord CND 6 ‘91-‘96

P Mather AFB MHR 5 ‘53-‘57

T Burbank BUR 5 ‘58-‘62

U Anaheim STN07161 1 ‘81

TABLE 5. Adjustment Factors for Annual Average Concentrations.

ID

Specific

Hours

Per Week

Modeled

Hours

Per

Week

Annual

Modeled

Concentration

Adjustment

Factor

A-07 58 70 0.829

A-08 59 70 0.843

A-09 59 70 0.843

A-28 122.5 122.5 1.000

A-52 51 63 0.810

A-83 53 63 0.841

A-86 60 77 0.779

A-92 47 63 0.746

I 92.5 133 0.695

O 45 63 0.714

P 60 70 0.857

T 56.5 70 0.807

U 60 70 0.857

G-01a

57 70 0.814

G-02a

57 70 0.814

G-03a

57 70 0.814

a. G-01, G-02, and G-03 are ‘generic’ facilities
TABLE 6. Specific Facility Impacts on Grid-Based Receptors Per 1 g/s Emission Rate.

A. Maximum ANNUAL Perc, MeCl, and TCE Concentrations (ug/m3).

Facility

ID

Site and Years of Met. Data

One max. annual concentration

generated per year of met data.

Direction

Rangea

(deg.)

Distance

Range

(m)

Highb

Max.

Conc.

Lowb

Max.

Conc.

Avg.b

Max.

Conc.

A-07 Oakland ‘60-‘64 108-108 32-32 120 107 113

A-08 Oakland ‘60-‘64 108-108 32-32 155 140 147

A-09 Oakland ‘60-‘64 108-108 32-32 124 110 118

A-28 McClellan AFB ‘53-‘57 342-342 32-32 322 209 261

A-52 LAX ‘85-‘89 72-108 32-32 104 92 100

A-83 Redding ‘87-‘89 162-162 32-32 100 91 95

A-86 Fresno ‘85-‘89 101-135 42-51 40 34 37

A-92 Fresno ‘85-‘89 108-108 32-32 102 80 88

I Sac Exec. ‘87, ‘89-‘92 349- 11 51-51 83 74 79

O Concord ‘91-‘96 162-162 32-32 97 82 89

P Mather AFB ‘53-‘57 342- 72 32-32 105 78 91

T Burbank ‘58-‘62 288-342 32-32 217 108 152

U Anaheim ‘81 72-72 32-32 337 337 337

Direction is measured clockwise, from North.

For each facility, one maximum concentration and associated location was determined per year of meteorological

data used for modeling (during hours of operation). For example, facility A-7 has five years of Oakland

meteorological data (Table 4; 1960,1961,1962,1963, and 1964). Thus, five maximum annual estimates at five

locations resulted for facility A-7. The tabulated high, low, and average concentrations are the high, low, and

average statistics based on these concentrations. Therefor, if the concentrations were 1, 2, 3, 4, and 5, then the low

would be 1, the average would be 3 and the high would be 5 (ug/m3). The distance and direction ranges indicate the

variability in location for the estimated maximum concentrations.

B. Maximum HOURLY Perc, MeCl, and TCE Concentrations (ug/m3).

Facility

ID

Site and Years of Met. Data

One maximum hourly

concentration is calculated per

year of met data.

Direction

Rangea

(deg.)

Distance

Range

(m)

Highb

Max.

Conc.

Lowb

Max.

Conc.

Avg.b

Max.

Conc.

A-07 Oakland ‘60-‘64 198- 33 32-42 5027 3799 4614

A-08 Oakland ‘60-‘64 252-288 32-32 5597 4269 5067

A-09 Oakland ‘60-‘64 252-108 32-32 3442 2703 3062

A-28 McClellan AFB ‘53-‘57 288- 18 32-42 5370 3977 5034

A-52 LAX ‘85-‘89 315-342 32-42 5096 4208 4600

A-83 Redding ‘87-‘89 162-198 32-32 6364 4241 5316

A-86 Fresno ‘85-‘89 101-301 51-58 1594 1077 1403

A-92 Fresno ‘85-‘89 135-315 32-42 5990 4383 5015

I Sac Exec. ‘87, ‘89-‘92 135-348 42-51 2231 1489 1995

O Concord ‘91-‘96 342-108 32-32 7335 7323 7329

P Mather AFB ‘53-‘57 252- 72 32-32 3289 2548 2952

T Burbank ‘58-‘62 288-108 32-32 5841 5835 5837

U Anaheim ‘81 108-108 32-32 5554 5554 5554

a, b. See Table 6A footnote, above. The same method was used here, but for hourly data.
TABLE 7. Facility Impacts on Business/ Residence Receptors (1 g/s Emission Rate).

A. NEAREST Business/Residential Receptor Maximum ANNUAL Concentrations (ug/m3).

Type ID X (m) Y (m)

Distancea

(m)

Directionb

(deg.) HIGHc LOWc AVGc

A-07 -5 20 32 * 348 47 33 41

A-08 10 -10 32 * 132 114 87 98

A-09 0 10 32 * 0 36 27 32

A-28 -80 -90 120 222 4 2 3

A-52 -30 -10 32 252 31 24 29

A-83 -30 0 32 * 270 23 23 23

A-86 60 -160 171 159 4 3 3

A-92 -30 10 32 288 78 70 73

I 30 90 95 18 33 27 30

O 0 -26 32 * 180 89 76 82

P 0 -31 32 * 180 51 27 38

T 0 -30 32 * 180 20 13 17

Bus.

(NBR)

U 91 0 91 90 22 22 22

A-07 10 0 32 * 90 124 107 115

A-08 -40 10 41 284 15 7 12

A-09 30 0 32 * 90 145 126 134

A-28 -90 -10 91 264 6 2 4

A-52 -35 30 46 311 32 26 28

A-83 0 -35 35 180 78 72 75

A-86 250 250 354 45 1 0 1

A-92 -50 -50 71 225 6 5 5

I -130 70 148 298 6 5 6

O -100 0 100 270 2 1 1

P -35 0 35 270 10 5 7

T 0 6 32 * 0 190 96 135

Res.

(NRR)

U 0 6 32 * 0 139 139 139

NOTES:

The symbol "*" indicates the receptor is closer than 32 meters from the source centroid. In this case, the

concentration is replaced with modeling results for the estimated concentration at 32 meters in the equivalent

direction from the source (i.e., +/- 3 degrees).

Direction is measured clockwise, from North.

For each facility and receptor, one maximum concentration was modeled per year of meteorological data indicated

in Table 4 (during hours of operation). For example, facility A-7 has five years of Oakland meteorological data

(1960,1961,1962,1963, and 1964). Thus, five maximum estimates were made for each A-7 receptor. The tabulated

high, low, and average concentrations are the high, low, and average statistics based on these concentrations.

Therefor, if the concentrations were 1, 2, 3, 4, and 5, then the low would be 1, the average would be 3 and the high

would be 5 (ug/m3).
TABLE 7 (continued).

B. NEAREST Business/Residential Receptor Maximum HOURLY Concentrations (ug/m3).

Type ID X (m) Y (m)

Distancea

(m)

Directionb

(deg.) HIGHc LOWc AVGc

A-07 -5 20 32 * 348 3818 2724 3021

A-08 10 -10 32 * 132 5430 3356 4485

A-09 0 10 32 * 0 2333 1752 1937

A-28 -80 -90 120 222 1404 733 976

A-52 -30 -10 32 252 2496 1914 2311

A-83 -30 0 32 * 270 2966 2095 2654

A-86 60 -160 171 159 439 253 345

A-92 -30 10 32 288 5903 4006 4467

I 30 90 95 18 960 721 771

O 0 -26 32 * 180 7258 6540 7085

P 0 -31 32 * 180 2261 1462 1862

T 0 -30 32 * 180 3148 2948 3059

Bus.

(NBR)

U 91 0 91 90 2399 2399 2399

A-07 10 0 32 * 90 3399 2200 2615

A-08 -40 10 41 284 4340 1836 3605

A-09 30 0 32 * 90 3437 2318 2712

A-28 -90 -10 91 264 1351 1202 1302

A-52 -35 30 46 311 4098 3073 3720

A-83 0 -35 35 180 3972 3742 3865

A-86 250 250 354 45 155 60 121

A-92 -50 -50 71 225 1265 1263 1264

I -130 70 148 298 746 503 592

O -100 0 100 270 2139 1344 1906

P -35 0 35 270 2652 2360 2537

T 0 6 32 * 0 3148 3026 3112

Res.

(NRR)

U 0 6 32 * 0 3107 3107 3107

NOTES:

The symbol "*" indicates the receptor is closer than 32 meters from the source centroid. In this case, the

concentration is replaced with modeling results for the estimated concentration at 32 meters in the equivalent

direction from the source (i.e., +/- 3 degrees).

Direction is measured clockwise, from North.

For each facility and receptor, one maximum concentration was modeled per year of meteorological data indicated

in Table 4 (during hours of operation). For example, facility A-7 has five years of Oakland meteorological data

(1960,1961,1962,1963, and 1964). Thus, five maximum estimates were made for each A-7 receptor. The tabulated

high, low, and average concentrations are the high, low, and average statistics based on these concentrations.

Therefor, if the concentrations were 1, 2, 3, 4, and 5, then the low would be 1, the average would be 3 and the high

would be 5 (ug/m3).
TABLE 7 (continued).

C. MAXIMUM Exposed Resident and Off-Site Worker ANNUAL Concentrations (ug/m3).

Type ID X (m) Y (m)

Distancea

(m)

Directionb

(deg.) HIGHc LOWc AVGc

A-07 50 10 51 79 51 41 47

A-08 30 30 42 45 32 29 30

A-09 -10 30 32 342 30 20 27

A-28 0 130 130 0 43 23 32

A-52 30 -10 32 108 104 81 96

A-83 -10 30 32 342 73 72 72

A-86 -160 50 168 287 4 4 4

A-92 -30 10 32 288 78 70 73

I 30 90 95 18 33 27 30

O 0 -20 32 * 180 89 76 82

P 0 30 32 * 0 90 50 70

T 0 30 32 * 0 190 96 135

Bus.

(MEIW)

U -10 30 32 342 124 124 124

A-07 30 -10 32 108 124 111 117

A-08 0 30 32 * 0 45 38 40

A-09 30 -10 32 108 126 112 120

A-28 10 -90 91 174 28 17 20

A-52 -40 30 50 307 28 23 25

A-83 10 -50 51 169 49 45 46

A-86 150 -50 158 108 7 6 6

A-92 -50 -30 58 239 11 8 9

I 70 140 157 27 14 12 13

O -100 0 100 270 2 1 1

P -30 -30 42 225 14 5 8

T 30 110 114 15 26 13 19

Res.

(MEIR)

U 30 10 32 72 337 337 337

NOTES:

The symbol "*" indicates the receptor is closer than 32 meters from the source centroid. In this case, the

concentration is replaced with modeling results for the estimated concentration at 32 meters in the equivalent

direction from the source (i.e., +/- 3 degrees).

Direction is measured clockwise, from North.

For each facility and receptor, one maximum concentration was modeled per year of meteorological data indicated

in Table 4 (during hours of operation). For example, facility A-7 has five years of Oakland meteorological data

(1960,1961,1962,1963, and 1964). Thus, five maximum estimates were made for each A-7 receptor. The tabulated

high, low, and average concentrations are the high, low, and average statistics based on these concentrations.

Therefor, if the concentrations were 1, 2, 3, 4, and 5, then the low would be 1, the average would be 3 and the high

would be 5 (ug/m3).
TABLE 7 (continued).

D. MAXIMUM Exposed Resident and Off-Site Worker HOURLY Concentrations (ug/m3).

Type ID X (m) Y (m)

Distancea

(m)

Directionb

(deg.) HIGHc LOWc AVGc

A-07 50 10 51 79 1964 1502 1674

A-08 30 30 42 45 3176 1780 2203

A-09 -10 30 32 342 2506 1797 2118

A-28 0 130 130 0 1229 822 1002

A-52 30 -10 32 108 2809 2079 2373

A-83 -10 30 32 342 3550 2837 3142

A-86 -160 50 168 287 597 389 436

A-92 -30 10 32 288 5903 4006 4467

I 30 90 95 18 960 721 771

O 0 -20 32 * 180 7258 6540 7085

P 0 30 32 * 0 2180 1630 1950

T 0 30 32 * 0 3148 3026 3112

Bus.

(MEIW)

U -10 30 32 342 3453 3453 3453

A-07 30 -10 32 108 3196 2331 2732

A-08 0 30 32 * 0 3076 2639 2911

A-09 30 -10 32 108 3089 2335 2609

A-28 10 -90 91 174 2019 1320 1606

A-52 -40 30 50 307 3630 2525 3283

A-83 10 -50 51 169 3739 2467 3016

A-86 150 -50 158 108 425 407 418

A-92 -50 -30 58 239 1808 1514 1604

I 70 140 157 27 665 417 483

O -100 0 100 270 2139 1344 1906

P -30 -30 42 225 2537 1689 2009

T 30 110 114 15 1166 994 1124

Res.

(MEIR)

U 30 10 32 72 4600 4600 4600

NOTES:

The symbol "*" indicates the receptor is closer than 32 meters from the source centroid. In this case, the

concentration is replaced with modeling results for the estimated concentration at 32 meters in the equivalent

direction from the source (i.e., +/- 3 degrees).

Direction is measured clockwise, from North.

For each facility and receptor, one maximum concentration was modeled per year of meteorological data indicated

in Table 4 (during hours of operation). For example, facility A-7 has five years of Oakland meteorological data

(1960,1961,1962,1963, and 1964). Thus, five maximum estimates were made for each A-7 receptor. The tabulated

high, low, and average concentrations are the high, low, and average statistics based on these concentrations.

Therefor, if the concentrations were 1, 2, 3, 4, and 5, then the low would be 1, the average would be 3 and the high

would be 5 (ug/m3).
TABLE 8. Specific Facility ANNUAL Population Exposure Estimates.

A. Facility A-07

ug/m3

>=

OAK60 OAK61 OAK62 OAK63 OAK64 AVG

0.000 1,300,824 1,300,824 1,300,824 1,300,824 1,300,824 1,300,824

0.001 593,781 610,692 638,801 610,352 618,981 614,521

0.003 377,141 385,071 401,672 391,357 423,603 395,769

0.004 268,996 281,562 283,035 268,881 312,438 282,982

0.006 192,742 203,315 220,437 216,063 234,450 213,401

0.007 176,510 174,360 181,645 165,209 194,184 178,382

0.009 132,661 143,847 149,503 143,106 142,784 142,380

0.010 112,796 115,642 119,774 119,184 131,794 119,838

0.011 103,975 106,927 105,949 105,949 119,588 108,478

0.013 95,571 90,808 99,529 100,217 95,886 96,402

0.014 87,623 86,550 91,753 78,587 87,623 86,427

0.016 80,258 69,719 87,623 70,114 79,699 77,483

0.017 59,443 61,804 61,804 66,517 67,676 63,449

0.020 56,185 58,546 54,494 63,259 55,002 57,497

0.024 52,133 52,133 52,133 56,185 44,033 51,323

0.031 38,289 42,785 38,289 42,785 38,289 40,087

0.041 29,615 33,907 33,907 33,907 29,615 32,190

0.047 25,101 25,101 25,101 25,101 25,101 25,101

0.054 12,008 12,008 20,702 16,407 20,702 16,365

0.163 4,302 4,302 12,008 4,302 4,302 5,843

B. Facility A-08

ug/m3

>=

OAK60 OAK61 OAK62 OAK63 OAK64 AVG

0.000 1,298,421 1,298,421 1,298,421 1,298,421 1,298,421 1,298,421

0.002 590,998 609,064 642,256 600,990 614,831 611,628

0.003 372,900 377,214 399,569 385,651 420,565 391,180

0.005 261,893 274,300 275,762 261,797 307,484 276,247

0.007 184,887 194,806 212,897 209,257 228,425 206,054

0.008 169,370 166,343 174,693 159,288 187,052 171,349

0.010 126,558 138,071 142,244 138,443 136,695 136,402

0.012 108,318 110,608 115,203 114,991 125,842 114,992

0.013 99,571 102,518 101,459 101,459 114,377 103,877

0.015 91,942 87,863 95,049 96,524 92,286 92,733

0.017 84,017 84,323 87,735 76,691 84,017 83,357

0.019 77,735 68,209 84,017 68,395 76,686 75,008

0.022 58,222 60,385 60,385 65,271 65,342 61,921

0.027 55,503 57,666 53,927 62,552 53,285 56,587

0.030 51,764 51,764 51,764 55,503 43,504 50,860

0.039 38,296 43,057 38,296 43,057 38,296 40,200

0.051 29,753 33,482 33,482 33,482 29,753 31,990

0.059 25,126 25,126 25,126 25,126 25,126 25,126

0.069 11,295 11,295 20,723 15,698 20,723 15,947

0.194 4,211 4,211 11,295 4,211 4,211 5,628
Table 8 (continued)

C. Facility A-09

ug/m3

>=

OAK60 OAK61 OAK62 OAK63 OAK64 AVG

0.000 1,312,711 1,312,711 1,312,711 1,312,711 1,312,711 1,312,711

0.002 461,066 490,388 553,210 496,290 538,802 507,951

0.003 238,173 254,190 260,944 250,042 284,618 257,593

0.005 180,277 185,757 184,326 176,966 204,019 186,269

0.007 141,163 139,784 149,326 149,895 154,487 146,931

0.008 129,661 123,896 131,211 119,883 136,115 128,153

0.010 100,604 107,792 108,405 106,942 108,725 106,494

0.012 88,336 92,591 97,057 94,838 103,117 95,188

0.013 81,759 87,248 87,159 87,159 91,990 87,063

0.015 74,224 78,410 84,116 82,351 74,512 78,723

0.017 70,551 68,201 81,316 55,115 70,551 69,147

0.019 64,602 53,233 66,237 55,034 59,604 59,742

0.022 40,825 45,646 45,646 48,401 52,148 46,533

0.025 36,270 41,091 40,945 41,091 41,992 40,278

0.030 36,043 36,124 36,124 36,270 29,165 34,745

0.039 24,938 25,019 24,938 24,938 24,938 24,954

0.051 18,565 24,038 24,038 24,038 18,565 21,849

0.061 12,930 8,709 12,930 8,709 12,930 11,242

0.067 7,013 7,013 11,234 8,709 11,234 9,041

0.743 2,155 2,155 2,155 2,155 2,155 2,155

D. Facility A-28

ug/m3

>=

MCC53 MCC54 MCC55 MCC56 MCC57 AVG

0.000 853,095 853,095 853,095 853,095 853,095 853,095

0.005 336,956 244,734 258,971 261,167 304,476 281,261

0.010 152,153 130,058 111,712 118,223 153,537 133,137

0.015 101,215 91,732 74,343 85,137 103,752 91,236

0.020 74,472 72,513 60,757 60,643 80,683 69,814

0.025 56,940 60,365 48,257 51,498 60,060 55,424

0.030 51,002 52,680 44,621 43,235 55,228 49,353

0.035 46,583 46,926 38,132 37,554 47,649 43,369

0.040 42,005 42,711 33,432 35,676 44,600 39,685

0.045 33,304 39,721 30,784 30,490 36,312 34,122

0.050 29,854 36,606 29,768 27,816 32,714 31,352

0.055 28,045 30,502 26,357 25,693 29,550 28,029

0.065 27,308 24,391 21,311 20,938 26,277 24,045

0.075 26,644 24,059 16,667 19,865 23,407 22,128

0.090 18,016 19,815 14,885 13,206 21,023 17,389

0.115 15,591 13,124 9,246 11,339 13,018 12,464

0.190 9,246 9,990 7,821 6,655 9,246 8,592

0.245 6,053 7,478 4,887 4,887 7,821 6,225

0.300 3,520 6,053 3,520 3,520 6,655 4,654

0.890 2,246 3,520 2,246 2,246 2,246 2,501
Table 8 (continued)

E. Facility A-52

ug/m3

>=

LAX85 LAX86 LAX87 LAX88 LAX89 AVG

0.000 1,911,577 1,911,577 1,911,577 1,911,577 1,911,577 1,911,577

0.002 1,130,443 1,228,549 1,037,868 1,014,739 1,036,357 1,089,591

0.003 854,499 937,504 765,428 738,152 725,801 804,277

0.005 652,146 743,174 599,519 569,739 579,928 628,901

0.007 532,602 568,336 432,623 437,277 458,270 485,822

0.008 424,140 392,907 319,160 324,663 367,086 365,591

0.010 345,824 261,121 208,983 234,383 283,070 266,676

0.012 267,884 189,198 148,624 166,623 205,039 195,474

0.013 190,073 135,967 115,113 113,764 146,519 140,287

0.015 148,053 119,347 94,304 98,527 118,533 115,753

0.017 128,942 99,260 87,609 92,729 95,507 100,809

0.019 97,016 89,290 73,257 76,942 86,713 84,644

0.022 82,073 74,752 68,307 66,778 72,393 72,861

0.025 73,257 63,594 58,959 64,584 65,565 65,192

0.027 70,515 61,003 47,844 51,106 60,778 58,249

0.030 56,104 46,885 43,994 43,994 47,038 47,603

0.035 37,278 43,035 34,180 33,428 39,926 37,569

0.040 33,428 35,507 27,682 27,682 27,682 30,396

0.050 27,682 18,396 24,941 24,941 24,941 24,180

0.074 13,494 16,516 13,494 13,494 13,494 14,098

0.084 11,614 10,461 5,559 5,559 7,439 8,126

0.178 5,559 2,912 2,912 2,912 5,559 3,971

F. Facility A-83

ug/m3

>=

RED87 RED88 RED89 AVG

0.000 112,941 112,941 112,941 112,941

0.002 89,292 89,242 89,142 89,225

0.003 52,432 52,712 52,779 52,641

0.005 37,020 37,554 37,304 37,293

0.006 30,812 30,816 29,777 30,468

0.008 26,178 24,850 26,095 25,708

0.010 21,145 20,579 22,341 21,355

0.011 19,024 16,358 15,791 17,058

0.013 14,959 14,732 13,303 14,331

0.015 12,290 13,610 11,994 12,631

0.018 11,095 11,483 11,095 11,224

0.019 10,441 10,584 10,584 10,536

0.021 9,238 9,930 9,930 9,699

0.024 8,627 9,238 8,627 8,831

0.031 7,773 7,773 7,773 7,773

0.034 6,208 6,971 7,010 6,730

0.037 5,514 5,636 6,369 5,840

0.041 4,873 4,873 4,873 4,873

0.044 4,148 3,041 2,869 3,353

0.099 2,144 2,144 2,144 2,144

0.126 1,460 1,460 1,460 1,460

0.784 732 732 732 732
Table 8 (continued)

G. Facility A-86

ug/m3

>=

FAT85 FAT86 FAT87 FAT88 FAT89 AVG

0.000 477,274 477,274 477,274 477,274 477,274 477,274

0.002 337,850 357,191 365,419 345,969 360,539 353,394

0.005 189,459 195,914 190,852 193,009 198,355 193,518

0.007 122,495 115,982 113,292 127,364 125,293 120,885

0.009 88,155 90,536 89,186 94,273 93,712 91,172

0.012 69,045 65,932 69,097 71,003 67,033 68,422

0.014 61,387 56,575 51,317 57,462 57,647 56,878

0.016 50,274 42,812 43,953 52,206 51,786 48,206

0.019 42,477 36,961 40,079 45,061 42,363 41,388

0.021 36,262 34,734 32,810 38,542 34,233 35,316

0.023 32,264 32,120 30,583 34,166 30,017 31,830

0.026 27,712 29,380 26,620 31,954 25,851 28,303

0.028 24,594 26,532 25,123 26,688 23,237 25,235

0.030 21,993 25,277 21,267 23,495 21,982 22,803

0.035 19,341 18,784 18,086 18,733 18,733 18,735

0.042 14,427 16,132 16,132 16,132 14,427 15,450

0.068 11,486 11,486 11,486 11,486 11,486 11,486

0.079 8,179 10,025 10,025 10,025 9,826 9,616

0.093 6,519 8,179 6,519 8,365 8,365 7,589

0.110 4,654 4,654 4,654 6,519 6,519 5,400

0.150 3,334 1,473 1,473 1,473 1,473 1,845

H. Facility A-92

ug/m3

>=

FAT85 FAT86 FAT87 FAT88 FAT89 AVG

0.000 480,503 480,503 480,503 480,503 480,503 480,503

0.001 440,557 449,563 444,538 441,142 419,626 439,085

0.003 303,217 322,739 314,524 320,171 298,091 311,748

0.004 215,408 229,536 226,347 243,631 220,907 227,166

0.006 161,621 166,135 164,117 185,768 171,039 169,736

0.007 128,853 126,454 123,923 138,497 121,661 127,878

0.009 104,696 96,909 97,175 97,329 96,405 98,503

0.010 87,407 82,324 74,577 82,633 85,664 82,521

0.012 65,065 62,702 60,778 68,515 74,858 66,384

0.015 51,490 50,656 50,265 57,420 51,468 52,260

0.016 47,845 48,257 46,086 49,518 45,757 47,493

0.018 43,470 44,243 44,612 46,086 43,217 44,326

0.021 28,911 36,404 30,128 34,940 36,658 33,408

0.024 26,364 28,911 26,379 29,584 29,125 28,073

0.028 23,685 21,598 24,277 25,835 23,156 23,710

0.036 19,513 18,656 18,656 18,656 18,656 18,827

0.046 16,571 16,571 16,571 16,571 16,571 16,571

0.061 14,070 14,070 14,070 14,070 14,070 14,070

0.073 7,238 9,135 9,135 11,103 12,173 9,757

0.109 4,648 2,566 2,566 2,566 4,648 3,399
Table 8 (continued)

I. Facility I

ug/m3

>=

SAC87 SAC89 SAC90 SAC91 SAC92 AVG

0.000 835,067 835,067 835,067 835,067 835,067 835,067

0.003 616,863 583,043 595,798 660,226 593,897 609,965

0.007 407,925 392,503 382,010 389,060 337,401 381,780

0.010 255,630 260,975 259,979 264,887 243,465 256,987

0.014 190,772 189,272 188,723 195,665 162,879 185,462

0.017 147,049 148,575 140,133 145,184 128,760 141,940

0.021 111,221 114,656 107,673 104,389 93,765 106,341

0.024 92,233 95,042 90,766 91,046 79,814 89,780

0.028 80,336 86,746 74,401 73,027 64,357 75,773

0.031 70,194 67,152 61,781 66,766 58,729 64,924

0.035 61,109 53,007 54,003 59,492 46,362 54,795

0.042 48,541 43,005 45,882 45,436 42,865 45,146

0.049 38,818 38,765 39,701 32,807 34,241 36,866

0.052 36,030 37,839 34,785 31,187 33,037 34,576

0.056 35,420 36,030 30,311 28,527 30,377 32,133

0.063 26,718 30,316 25,514 25,514 24,090 26,430

0.076 24,090 24,090 22,656 20,641 20,641 22,424

0.097 16,129 18,144 18,560 18,210 18,560 17,921

0.132 14,071 10,543 14,330 10,209 10,233 11,877

0.153 6,681 8,744 8,744 4,699 6,681 7,110

0.226 4,699 3,066 3,066 3,066 3,066 3,393

1.685 1,408 1,408 1,408 1,408 1,408 1,408
Table 8 (continued)

J. Facility O

ug/m3

>=

CND91 CND92 CND93 CND94 CND95 CND96 AVG

0.000 603,481 603,481 603,481 603,481 603,481 603,481 603,481

0.002 508,112 540,788 554,104 544,946 548,281 455,248 525,247

0.004 365,435 383,659 433,291 398,513 378,358 372,090 388,558

0.006 292,785 310,334 320,173 320,625 299,405 297,826 306,858

0.009 228,054 235,912 258,210 250,769 231,755 241,739 241,073

0.011 188,290 202,250 215,623 209,214 195,479 195,075 200,989

0.013 149,185 165,981 174,375 176,230 163,935 157,113 164,470

0.015 122,756 132,596 141,095 142,698 135,401 124,679 133,204

0.017 102,917 108,755 116,198 124,379 115,768 108,810 112,805

0.019 81,179 89,284 96,943 110,316 99,212 91,766 94,783

0.021 72,324 79,092 79,257 91,625 78,914 74,137 79,225

0.024 59,163 65,619 65,330 72,069 71,828 64,869 66,480

0.026 49,965 53,890 61,623 62,927 56,756 52,949 56,352

0.028 46,466 48,922 45,717 57,013 48,922 46,521 48,927

0.030 44,601 37,355 44,323 49,977 44,618 44,200 44,179

0.032 37,397 34,965 40,283 41,412 38,565 33,361 37,664

0.034 31,722 33,778 37,662 36,192 31,403 30,051 33,468

0.039 24,115 27,615 31,369 31,689 28,782 23,657 27,871

0.043 20,369 17,453 23,501 23,659 19,845 22,015 21,140

0.054 15,428 15,379 17,453 17,453 17,453 15,428 16,432

0.064 13,354 11,717 11,717 15,428 13,354 13,354 13,154

0.084 7,553 7,553 9,644 9,626 7,483 7,553 8,235

0.099 5,410 5,410 7,553 5,410 5,410 5,410 5,767

0.122 3,468 3,468 3,468 5,410 3,468 3,468 3,792

0.827 1,930 1,930 1,930 1,930 1,930 1,930 1,930

K. Facility P

ug/m3

>=

MHR53 MHR54 MHR55 MHR56 MHR57 AVG

0.000 850,528 850,528 850,528 850,528 850,528 850,528

0.002 336,898 369,410 391,227 399,119 386,840 376,699

0.003 122,354 145,148 147,265 180,129 185,226 156,024

0.005 70,818 82,345 81,595 94,854 111,053 88,133

0.007 54,021 58,867 61,688 62,010 68,499 61,017

0.009 44,268 47,769 47,770 49,509 53,389 48,541

0.010 41,246 41,139 40,973 41,324 41,643 41,265

0.012 31,912 35,589 34,948 37,060 37,633 35,428

0.014 30,062 32,358 33,715 33,200 32,912 32,449

0.015 26,538 29,676 27,840 27,586 31,519 28,632

0.019 23,174 26,333 24,904 26,112 28,926 25,890

0.021 21,735 23,951 23,465 23,432 27,197 23,956

0.024 19,615 22,489 20,989 20,956 24,546 21,719

0.033 15,310 13,848 13,848 18,930 18,930 16,173

0.045 12,060 12,060 12,060 12,060 14,839 12,616

0.070 9,053 10,827 9,053 5,517 5,517 7,993

0.747 2,369 2,369 2,369 2,369 2,369 2,369
Table 8 (continued)

L. Facility T

ug/m3

>=

BUR58 BUR59 BUR60 BUR61 BUR62 AVG

0.000 3,024,643 3,024,643 3,024,643 3,024,643 3,024,643 3,024,643

0.003 739,728 942,735 632,531 511,097 475,138 660,246

0.006 347,090 418,212 292,115 224,567 225,716 301,540

0.010 229,804 266,095 192,544 151,565 153,430 198,688

0.013 176,395 183,100 157,425 120,645 118,033 151,120

0.016 144,802 159,209 118,996 89,994 99,606 122,521

0.019 128,284 138,963 103,654 81,619 86,028 107,710

0.023 103,748 104,316 75,682 64,699 67,048 83,099

0.026 87,841 94,759 71,483 60,264 63,812 75,632

0.029 77,493 91,123 67,048 54,321 60,086 70,014

0.036 71,483 71,483 53,982 47,020 44,547 57,703

0.039 60,264 67,048 47,783 34,745 34,745 48,917

0.045 48,273 54,555 44,547 28,894 32,255 41,705

0.052 44,547 48,612 28,894 20,072 26,404 33,706

0.065 34,745 34,745 20,072 16,128 16,128 24,364

0.090 16,128 20,072 17,387 7,303 13,443 14,867

0.252 7,303 7,303 7,303 3,802 7,303 6,603
Table 8 (continued)

M. Facility U

ug/m3

>=

STN0718 AVG

0.000 1,961,694 1,961,694

0.003 1,219,573 1,219,573

0.007 805,311 805,311

0.010 543,541 543,541

0.014 383,889 383,889

0.017 260,905 260,905

0.021 196,552 196,552

0.024 163,914 163,914

0.027 136,273 136,273

0.031 114,592 114,592

0.034 105,462 105,462

0.038 81,959 81,959

0.041 79,952 79,952

0.045 70,117 70,117

0.048 64,952 64,952

0.051 63,818 63,818

0.058 57,422 57,422

0.062 54,507 54,507

0.065 49,921 49,921

0.069 43,111 43,111

0.086 39,043 39,043

0.089 35,161 35,161

0.093 31,650 31,650

0.103 23,210 23,210

0.106 19,585 19,585

0.209 15,611 15,611

0.237 10,965 10,965

0.254 7,225 7,225

1.714 3,683 3,683
TABLE 9. Generic Facility Concentration Estimates Per 1 g/s Emission Rate.

A. Maximum ANNUAL Perc, MeCl, and TCE Concentrations (ug/m3).

ID Met. Data Used

Direction

Range

(deg.)

Distance

Range

(m)

High

Max.

Conc.

Low

Max.

Conc.

Avg.

Max.

Conc.

G-01 10 Sites, Multi-Year N/A 20 617 198 327

G-02 10 Sites, Multi-Year N/A 20 397 121 198

G-03 10 Sites, Multi-Year N/A 30 154 47 72

NOTE: All met data indicated in Table 9A is used per generic facility. High, low, and average statistics are based

on the single highest concentrations estimated per met site (i.e., a sample size of ten, per generic facility). Direction

is omitted due to assuming an arbitrary facility orientation (length along X-axis).

B. Maximum HOURLY Perc, MeCl, and TCE Concentrations (ug/m3).

ID Met. Data Used

Direction

Range

(deg.)

Distance

Range 1

(m)

High

Max.

Conc.

Low

Max.

Conc.

Avg.

Max.

Conc.

G-01 10 Sites, Multi-Year

Default ‘screening’

N/A 20

20

12,418

11,343

8,383

10,449

10,938

10,757

G-02 10 Sites, Multi-Year

Default ‘screening’

N/A 20

20

5,533

5,277

3,794

4,628

4,986

4,864

G-03 10 Sites, Multi-Year

Default ‘screening’

N/A 50

20

2,644

2,745

1,713

1,955

2,079

2,281

NOTE:

Building orientation was set up in two different ways. For default, ‘screening’ runs distances are measured from

each facility’s leading edge. For all other runs distances are measured from the facility centroid. Thus, default,

‘screening’ distances can be adjusted for comparison by adding half of each facility’s length to these distances and

to distance in Appendix A (6, 10, and 30 meters, respectively, for G-01, G-02, and G-03). Thus, the adjusted

distances for the indicated maximum hourly screening concentrations for G-01, G-02, and G-03 would be 26 meters,

30 meters, and 50 meters, respectively.

All met data indicated in Table 9A is used per generic facility. High, low, and average statistics are based on the

single highest concentrations estimated per met site (i.e., a sample size of ten, per generic facility). Direction is

omitted due to assuming an arbitrary facility orientation (length along X-axis).
Appendix A

Generic Facility

Maximum Hourly and Maximum Annual

Modeling Results

IMPORTANT NOTE:

Building orientation was set up in two different ways. For default, ‘screening’ runs distances are measured from

each facility’s leading edge. For all other runs, distances are measured from the facility centroid. This difference

has not been accounted for in the following tables. Thus, default, ‘screening’ concentrations at specific distances

reported in the following tables can be adjusted for comparison to other concentrations (i.e. from the facility center)

by adding half of each facility’s length to the indicated distances (6, 10, and 30 meters, respectively, for G-01, G-02,

and G-03).
Appendix A: ISCST3 Generic Facility Concentration Results vs. Distance Using Default and Regional Met Data

SITENAME PERIOD DISTANCE DFLT_00 DFLT_45 DFLT_90 BUR CND FAT LAX MCC MHR OAK RED SAC STN071 AVERAGE LOW HIGH

G01 1-HR 20 11343 10449 10480 12418 12418 11156 8383 11008 8471 10520 11400 11199 12413 10938 8383 12418

G01 1-HR 30 8496 7887 8249 9255 9255 8403 5997 8490 5762 8021 8621 8535 9249 8159 5762 9255

G01 1-HR 40 6579 6106 6464 7115 7115 6522 4610 6666 4465 6282 6687 6652 7110 6322 4465 7115

G01 1-HR 50 5239 4934 5112 5625 5625 5186 3645 5344 3546 5030 5317 5307 5620 5025 3546 5625

G01 1-HR 60 4269 4064 4114 4555 4555 4215 2952 4368 2879 4106 4323 4324 4551 4083 2879 4555

G01 1-HR 70 3547 3404 3460 3764 3764 3490 2439 3634 2382 3411 3581 3588 3760 3381 2382 3764

G01 1-HR 80 2996 2892 2947 3164 3164 2938 2050 3070 2004 2877 3016 3026 3160 2847 2004 3164

G01 1-HR 90 2565 2488 2539 2698 2698 2507 1748 2628 1710 2460 2576 2587 2694 2430 1710 2698

G01 1-HR 100 2223 2165 2210 2329 2329 2166 1509 2275 1478 2127 2226 2238 2326 2100 1478 2329

G01 1-HR 120 1720 1684 1720 1791 1791 1665 1160 1757 1141 1639 1714 1725 1788 1617 1141 1791

G01 1-HR 140 1373 1350 1378 1423 1423 1323 1011 1400 909 1304 1364 1374 1421 1295 909 1423

G01 1-HR 150 1239 1220 1245 1282 1282 1192 953 1262 820 1174 1228 1238 1280 1171 820 1282

G01 1-HR 160 1125 1109 1131 1161 1161 1079 902 1145 743 1064 1113 1122 1159 1065 743 1161

G01 1-HR 180 940 929 947 967 967 899 815 955 621 886 929 936 966 894 621 967

G01 1-HR 200 799 791 805 820 820 761 744 810 527 751 789 794 819 764 527 820

G01 1-HR 250 564 559 568 576 576 533 612 570 371 526 556 558 574 545 371 612

G01 1-HR 300 422 420 426 430 430 398 521 426 278 392 416 417 429 414 278 521

G01 1-HR 350 330 329 333 335 335 310 454 332 217 306 325 326 335 328 217 454

G01 1-HR 400 267 266 269 271 271 250 403 268 175 246 262 263 270 268 175 403

G01 1-HR 450 222 221 223 224 224 206 363 222 145 203 217 218 224 225 145 363

G01 1-HR 500 188 187 189 189 189 174 331 188 123 172 184 184 189 192 123 331

G01 1-HR 600 141 140 142 142 142 130 282 141 92 128 138 138 142 147 92 282

G01 1-HR 700 111 111 111 112 112 102 246 111 72 100 108 108 111 118 72 246

G01 1-HR 800 90 90 91 91 91 83 220 90 59 81 88 88 91 98 59 220

G01 1-HR 900 75 75 76 76 76 69 198 75 49 68 74 74 76 83 49 198

G01 1-HR 1000 64 64 64 65 65 59 181 64 42 58 63 63 65 72 42 181

G01 1-HR 2000 24 24 24 24 24 21 103 23 15 21 23 23 24 30 15 103

G01 1-HR 3000 14 14 14 14 14 12 75 14 9 12 13 13 14 19 9 75

G01 1-HR 4000 10 10 10 10 10 8 61 9 6 8 9 9 10 14 6 61

G01 1-HR 5000 7 7 7 7 7 6 52 7 5 6 7 7 7 11 5 52

G01 1-HR 6000 6 6 6 6 6 5 46 6 4 5 6 6 6 9 4 46

G01 1-HR 7000 5 5 5 5 5 4 41 5 3 4 5 5 5 8 3 41

G01 1-HR 8000 4 4 4 4 4 3 37 4 3 3 4 4 4 7 3 37

G01 1-HR 9000 4 4 4 4 4 3 34 4 2 3 4 4 4 6 2 34

G01 1-HR 10000 3 3 3 3 3 2 32 3 2 2 3 3 3 6 2 32

G01 1-HR 23000 1 1 1 1 1 1 18 1 1 1 1 1 2 3 1 18

SITENAME PERIOD DISTANCE DFLT_00 DFLT_45 DFLT_90 BUR CND FAT LAX MCC MHR OAK RED SAC STN071 AVERAGE LOW HIGH

G02 1-HR 20 5277 4688 4628 5528 5533 5151 4438 4940 3794 4686 5263 5079 5444 4986 3794 5533

G02 1-HR 30 4359 3967 3997 4845 4845 4330 3329 4201 3374 4028 4406 4307 4844 4251 3329 4845

G02 1-HR 40 3649 3368 3418 4048 4048 3636 2623 3603 2579 3439 3722 3661 4047 3541 2579 4048

G02 1-HR 50 3095 2869 2982 3418 3418 3085 2215 3101 2119 2942 3169 3130 3416 3001 2119 3418

G02 1-HR 60 2656 2459 2596 2918 2918 2652 1891 2687 1819 2532 2722 2698 2916 2575 1819 2918

G02 1-HR 70 2304 2128 2263 2518 2518 2300 1631 2345 1576 2209 2360 2345 2516 2232 1576 2518

G02 1-HR 80 2018 1881 1979 2194 2194 2012 1421 2062 1378 1941 2064 2055 2192 1951 1378 2194

G02 1-HR 90 1782 1674 1739 1928 1928 1774 1249 1825 1214 1717 1820 1815 1926 1720 1214 1928

G02 1-HR 100 1586 1500 1536 1708 1708 1575 1162 1627 1077 1530 1616 1615 1707 1533 1077 1708

G02 1-HR 120 1282 1224 1241 1370 1370 1267 1021 1316 865 1235 1301 1302 1368 1242 865 1370

G02 1-HR 140 1059 1019 1037 1124 1124 1042 911 1088 711 1019 1070 1073 1123 1029 711 1124

G02 1-HR 150 970 936 953 1026 1026 952 865 995 650 932 978 981 1025 943 650 1026

G02 1-HR 160 892 863 879 941 941 873 823 915 596 855 898 901 940 868 596 941

G02 1-HR 180 762 741 755 801 801 743 751 781 507 729 765 768 800 744 507 801

G02 1-HR 200 660 644 657 691 691 641 690 675 439 630 660 664 690 647 439 691

G02 1-HR 250 482 474 483 501 501 464 576 492 319 457 479 483 500 477 319 576

G02 1-HR 300 370 365 372 382 382 354 495 377 245 349 366 369 382 370 245 495

G02 1-HR 350 295 292 297 303 303 281 435 299 195 277 291 294 303 298 195 435

G02 1-HR 400 242 240 243 248 248 229 389 245 159 226 239 240 247 247 159 389

G02 1-HR 450 203 201 204 207 207 191 352 205 134 189 200 201 207 209 134 352

G02 1-HR 500 173 172 174 177 177 163 321 175 114 160 171 171 176 181 114 321

G02 1-HR 600 132 131 133 134 134 123 275 133 87 121 130 130 134 140 87 275

G02 1-HR 700 105 104 105 106 106 97 241 105 69 96 103 103 106 113 69 241

G02 1-HR 800 86 86 86 87 87 80 216 86 56 78 84 84 87 94 56 216

G02 1-HR 900 72 72 73 73 73 67 195 72 47 65 71 71 73 81 47 195

G02 1-HR 1000 62 62 62 62 62 57 179 62 40 56 61 61 62 70 40 179

G02 1-HR 2000 23 23 23 23 23 21 102 23 15 20 23 23 23 30 15 102

G02 1-HR 3000 14 14 14 14 14 12 75 13 9 12 13 13 14 19 9 75

G02 1-HR 4000 9 9 9 9 9 8 61 9 6 8 9 9 9 14 6 61

G02 1-HR 5000 7 7 7 7 7 6 52 7 5 6 7 7 7 11 5 52

G02 1-HR 6000 6 6 6 6 6 5 46 6 4 5 6 6 6 9 4 46

G02 1-HR 7000 5 5 5 5 5 4 41 5 3 4 5 5 5 8 3 41

G02 1-HR 8000 4 4 4 4 4 3 37 4 3 3 4 4 4 7 3 37

G02 1-HR 9000 4 4 4 4 4 3 34 4 2 3 4 4 4 6 2 34

G02 1-HR 10000 3 3 3 3 3 2 32 3 2 2 3 3 3 6 2 32

G02 1-HR 23000 1 1 1 1 1 1 18 1 1 1 1 1 2 3 1 18

SITENAME PERIOD DISTANCE DFLT_00 DFLT_45 DFLT_90 BUR CND FAT LAX MCC MHR OAK RED SAC STN071 AVERAGE LOW HIGH

G03 1-HR 20 2745 2144 1955 1344 1345 1266 993 1325 958 1242 1204 1296 1344 1232 958 1345

G03 1-HR 30 2385 1902 1899 1965 1965 1668 1273 1554 1290 1457 1727 1644 1964 1651 1273 1965

G03 1-HR 40 2088 1703 1724 1702 1702 1473 1103 1492 1241 1456 1518 1452 1702 1484 1103 1702

G03 1-HR 50 1841 1533 1510 2641 2644 1934 1713 1765 1735 1716 2116 1885 2644 2079 1713 2644

G03 1-HR 60 1636 1387 1375 2498 2498 1747 1619 1582 1547 1622 1858 1691 2497 1916 1547 2498

G03 1-HR 70 1463 1252 1259 2180 2180 1553 1413 1382 1268 1416 1678 1516 2179 1676 1268 2180

G03 1-HR 80 1316 1139 1153 1916 1916 1403 1241 1215 1058 1244 1511 1379 1915 1480 1058 1916

G03 1-HR 90 1191 1048 1062 1695 1695 1280 1099 1118 896 1101 1361 1252 1695 1319 896 1695

G03 1-HR 100 1083 967 986 1511 1511 1168 979 1034 791 981 1227 1135 1510 1185 791 1511

G03 1-HR 120 909 827 843 1223 1223 977 833 882 667 824 1006 937 1222 980 667 1223

G03 1-HR 140 774 713 723 1012 1012 825 761 754 569 717 837 805 1011 830 569 1012

G03 1-HR 150 719 664 681 927 927 761 729 699 527 670 777 750 927 769 527 927

G03 1-HR 160 669 619 642 853 853 703 699 654 490 627 722 700 852 715 490 853

G03 1-HR 180 585 542 571 730 730 606 645 580 426 551 630 614 730 624 426 730

G03 1-HR 200 516 477 509 633 633 528 601 517 374 487 554 543 633 550 374 633

G03 1-HR 250 392 357 388 464 464 396 517 399 280 368 416 411 464 418 280 517

G03 1-HR 300 310 287 303 358 358 311 454 318 218 292 326 324 357 331 218 454

G03 1-HR 350 252 237 242 286 286 252 404 260 176 238 263 263 285 271 176 404

G03 1-HR 400 210 200 199 235 235 209 365 217 145 199 218 218 235 228 145 365

G03 1-HR 450 179 171 171 198 198 176 333 185 123 169 184 185 197 195 123 333

G03 1-HR 500 155 149 149 169 169 151 306 159 105 146 158 159 169 169 105 306

G03 1-HR 600 120 116 117 129 129 116 265 123 80 113 122 122 129 133 80 265

G03 1-HR 700 96 94 95 103 103 93 234 99 64 90 97 98 102 108 64 234

G03 1-HR 800 80 78 79 84 84 76 210 82 53 74 80 81 84 91 53 210

G03 1-HR 900 68 67 67 71 71 64 191 69 45 63 67 68 71 78 45 191

G03 1-HR 1000 58 58 58 61 61 55 175 59 39 54 58 59 61 68 39 175

G03 1-HR 2000 23 23 23 23 23 21 101 23 15 20 22 22 23 29 15 101

G03 1-HR 3000 13 13 13 14 14 12 74 13 9 11 13 13 14 19 9 74

G03 1-HR 4000 9 9 9 9 9 8 60 9 6 8 9 9 9 14 6 60

G03 1-HR 5000 7 7 7 7 7 6 52 7 5 6 7 7 7 11 5 52

G03 1-HR 6000 6 6 6 6 6 5 45 6 4 5 6 6 6 9 4 45

G03 1-HR 7000 5 5 5 5 5 4 41 5 3 4 5 5 5 8 3 41

G03 1-HR 8000 4 4 4 4 4 3 37 4 3 3 4 4 4 7 3 37

G03 1-HR 9000 4 4 4 4 4 3 34 4 2 3 4 4 4 6 2 34

G03 1-HR 10000 3 3 3 3 3 2 32 3 2 2 3 3 3 6 2 32

G03 1-HR 23000 1 1 1 1 1 1 18 1 1 1 1 1 2 3 1 18
Appendix A: ISCST3 Generic Facility Concentration Results vs. Distance Using Default and Regional Met Data

SITENAME PERIOD DISTANCE DFLT_00 DFLT_45 DFLT_90 BUR CND FAT LAX MCC MHR OAK RED SAC STN071 AVERAGE LOW HIGH

G01 ANNUAL 20 Not Applicable w/ Annual 617 266 262 358 291 209 272 198 206 588 327 198 617

G01 ANNUAL 30 Not Applicable w/ Annual 353 150 147 216 169 119 151 117 115 328 186 115 353

G01 ANNUAL 40 Not Applicable w/ Annual 227 96 94 144 109 76 96 77 73 209 120 73 227

G01 ANNUAL 50 Not Applicable w/ Annual 158 68 66 102 76 53 67 54 50 145 84 50 158

G01 ANNUAL 60 Not Applicable w/ Annual 116 50 48 76 56 39 49 40 37 106 62 37 116

G01 ANNUAL 70 Not Applicable w/ Annual 88 39 37 59 43 30 38 31 28 81 47 28 88

G01 ANNUAL 80 Not Applicable w/ Annual 70 31 29 47 34 23 30 25 22 64 37 22 70

G01 ANNUAL 90 Not Applicable w/ Annual 56 25 24 39 28 19 24 20 18 52 30 18 56

G01 ANNUAL 100 Not Applicable w/ Annual 47 21 20 32 23 16 20 17 15 43 25 15 47

G01 ANNUAL 120 Not Applicable w/ Annual 33 15 14 23 16 11 14 12 10 30 18 10 33

G01 ANNUAL 140 Not Applicable w/ Annual 25 11 11 18 12 8 11 9 8 23 14 8 25

G01 ANNUAL 150 Not Applicable w/ Annual 22 10 9 16 11 7 9 8 7 20 12 7 22

G01 ANNUAL 160 Not Applicable w/ Annual 19 9 8 14 10 7 8 7 6 18 11 6 19

G01 ANNUAL 180 Not Applicable w/ Annual 15 7 7 11 8 5 7 6 5 14 8 5 15

G01 ANNUAL 200 Not Applicable w/ Annual 13 6 5 9 6 4 5 5 4 12 7 4 13

G01 ANNUAL 250 Not Applicable w/ Annual 8 4 4 6 4 3 4 3 3 8 5 3 8

G01 ANNUAL 300 Not Applicable w/ Annual 6 3 2 4 3 2 3 2 2 5 3 2 6

G01 ANNUAL 350 Not Applicable w/ Annual 4 2 2 3 2 1 2 2 1 4 2 1 4

G01 ANNUAL 400 Not Applicable w/ Annual 3 2 1 3 2 1 1 1 1 3 2 1 3

G01 ANNUAL 450 Not Applicable w/ Annual 3 1 1 2 1 1 1 1 1 2 1 1 3

G01 ANNUAL 500 Not Applicable w/ Annual 2 1 1 2 1 1 1 1 1 2 1 1 2

G01 ANNUAL 600 Not Applicable w/ Annual 2 1 1 1 1 1 1 1 0 1 1 0 2

G01 ANNUAL 700 Not Applicable w/ Annual 1 1 0 1 1 0 1 0 0 1 1 0 1

G01 ANNUAL 800 Not Applicable w/ Annual 1 0 0 1 0 0 0 0 0 1 0 0 1

G01 ANNUAL 900 Not Applicable w/ Annual 1 0 0 1 0 0 0 0 0 1 0 0 1

G01 ANNUAL 1000 Not Applicable w/ Annual 1 0 0 0 0 0 0 0 0 1 0 0 1

G01 ANNUAL 2000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G01 ANNUAL 3000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G01 ANNUAL 4000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G01 ANNUAL 5000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G01 ANNUAL 6000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G01 ANNUAL 7000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G01 ANNUAL 8000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G01 ANNUAL 9000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G01 ANNUAL 10000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G01 ANNUAL 23000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

SITENAME PERIOD DISTANCE DFLT_00 DFLT_45 DFLT_90 BUR CND FAT LAX MCC MHR OAK RED SAC STN071 AVERAGE LOW HIGH

G02 ANNUAL 20 Not Applicable w/ Annual 397 173 155 181 178 135 138 121 135 370 198 121 397

G02 ANNUAL 30 Not Applicable w/ Annual 257 114 113 148 121 88 118 82 88 251 138 82 257

G02 ANNUAL 40 Not Applicable w/ Annual 177 77 75 106 84 61 79 58 59 168 94 58 177

G02 ANNUAL 50 Not Applicable w/ Annual 129 55 54 79 62 44 56 43 42 120 69 42 129

G02 ANNUAL 60 Not Applicable w/ Annual 98 42 41 61 47 33 42 33 32 91 52 32 98

G02 ANNUAL 70 Not Applicable w/ Annual 76 33 32 49 37 26 33 26 25 71 41 25 76

G02 ANNUAL 80 Not Applicable w/ Annual 61 27 26 40 30 21 26 21 20 57 33 20 61

G02 ANNUAL 90 Not Applicable w/ Annual 50 22 21 33 25 17 22 18 16 46 27 16 50

G02 ANNUAL 100 Not Applicable w/ Annual 42 18 18 28 21 14 18 15 13 39 23 13 42

G02 ANNUAL 120 Not Applicable w/ Annual 31 14 13 21 15 10 13 11 10 28 16 10 31

G02 ANNUAL 140 Not Applicable w/ Annual 23 10 10 16 11 8 10 8 7 21 13 7 23

G02 ANNUAL 150 Not Applicable w/ Annual 20 9 9 14 10 7 9 7 6 19 11 6 20

G02 ANNUAL 160 Not Applicable w/ Annual 18 8 8 13 9 6 8 7 6 17 10 6 18

G02 ANNUAL 180 Not Applicable w/ Annual 15 7 6 10 7 5 6 5 5 13 8 5 15

G02 ANNUAL 200 Not Applicable w/ Annual 12 6 5 9 6 4 5 4 4 11 7 4 12

G02 ANNUAL 250 Not Applicable w/ Annual 8 4 3 6 4 3 3 3 2 7 4 2 8

G02 ANNUAL 300 Not Applicable w/ Annual 6 3 2 4 3 2 2 2 2 5 3 2 6

G02 ANNUAL 350 Not Applicable w/ Annual 4 2 2 3 2 1 2 2 1 4 2 1 4

G02 ANNUAL 400 Not Applicable w/ Annual 3 2 1 2 2 1 1 1 1 3 2 1 3

G02 ANNUAL 450 Not Applicable w/ Annual 3 1 1 2 1 1 1 1 1 2 1 1 3

G02 ANNUAL 500 Not Applicable w/ Annual 2 1 1 2 1 1 1 1 1 2 1 1 2

G02 ANNUAL 600 Not Applicable w/ Annual 1 1 1 1 1 1 1 1 0 1 1 0 1

G02 ANNUAL 700 Not Applicable w/ Annual 1 1 0 1 1 0 1 0 0 1 1 0 1

G02 ANNUAL 800 Not Applicable w/ Annual 1 0 0 1 0 0 0 0 0 1 0 0 1

G02 ANNUAL 900 Not Applicable w/ Annual 1 0 0 1 0 0 0 0 0 1 0 0 1

G02 ANNUAL 1000 Not Applicable w/ Annual 1 0 0 0 0 0 0 0 0 1 0 0 1

G02 ANNUAL 2000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G02 ANNUAL 3000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G02 ANNUAL 4000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G02 ANNUAL 5000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G02 ANNUAL 6000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G02 ANNUAL 7000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G02 ANNUAL 8000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G02 ANNUAL 9000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G02 ANNUAL 10000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G02 ANNUAL 23000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

SITENAME PERIOD DISTANCE DFLT_00 DFLT_45 DFLT_90 BUR CND FAT LAX MCC MHR OAK RED SAC STN071 AVERAGE LOW HIGH

G03 ANNUAL 20 Not Applicable w/ Annual 71 40 41 45 25 30 32 26 31 90 43 25 90

G03 ANNUAL 30 Not Applicable w/ Annual 154 67 52 59 63 54 47 47 54 128 72 47 154

G03 ANNUAL 40 Not Applicable w/ Annual 140 64 47 45 57 49 38 44 49 119 65 38 140

G03 ANNUAL 50 Not Applicable w/ Annual 113 57 57 77 43 44 55 38 42 126 65 38 126

G03 ANNUAL 60 Not Applicable w/ Annual 80 41 48 64 34 37 53 27 31 96 51 27 96

G03 ANNUAL 70 Not Applicable w/ Annual 62 31 35 50 28 27 39 21 23 72 39 21 72

G03 ANNUAL 80 Not Applicable w/ Annual 51 24 27 40 24 21 30 17 18 56 31 17 56

G03 ANNUAL 90 Not Applicable w/ Annual 42 20 22 33 20 16 24 15 15 45 25 15 45

G03 ANNUAL 100 Not Applicable w/ Annual 36 17 18 28 17 13 20 12 13 37 21 12 37

G03 ANNUAL 120 Not Applicable w/ Annual 27 12 13 20 13 9 14 9 9 27 15 9 27

G03 ANNUAL 140 Not Applicable w/ Annual 21 9 10 16 10 7 10 7 7 20 12 7 21

G03 ANNUAL 150 Not Applicable w/ Annual 19 8 8 14 9 6 9 7 6 18 10 6 19

G03 ANNUAL 160 Not Applicable w/ Annual 17 8 8 12 8 6 8 6 6 16 9 6 17

G03 ANNUAL 180 Not Applicable w/ Annual 14 6 6 10 7 5 6 5 4 13 8 4 14

G03 ANNUAL 200 Not Applicable w/ Annual 11 5 5 8 6 4 5 4 4 11 6 4 11

G03 ANNUAL 250 Not Applicable w/ Annual 8 4 3 6 4 3 3 3 2 7 4 2 8

G03 ANNUAL 300 Not Applicable w/ Annual 5 3 2 4 3 2 2 2 2 5 3 2 5

G03 ANNUAL 350 Not Applicable w/ Annual 4 2 2 3 2 1 2 2 1 4 2 1 4

G03 ANNUAL 400 Not Applicable w/ Annual 3 2 1 2 2 1 1 1 1 3 2 1 3

G03 ANNUAL 450 Not Applicable w/ Annual 3 1 1 2 1 1 1 1 1 2 1 1 3

G03 ANNUAL 500 Not Applicable w/ Annual 2 1 1 2 1 1 1 1 1 2 1 1 2

G03 ANNUAL 600 Not Applicable w/ Annual 1 1 1 1 1 1 1 1 0 1 1 0 1

G03 ANNUAL 700 Not Applicable w/ Annual 1 1 0 1 1 0 0 0 0 1 1 0 1

G03 ANNUAL 800 Not Applicable w/ Annual 1 0 0 1 0 0 0 0 0 1 0 0 1

G03 ANNUAL 900 Not Applicable w/ Annual 1 0 0 1 0 0 0 0 0 1 0 0 1

G03 ANNUAL 1000 Not Applicable w/ Annual 1 0 0 0 0 0 0 0 0 1 0 0 1

G03 ANNUAL 2000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G03 ANNUAL 3000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G03 ANNUAL 4000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G03 ANNUAL 5000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G03 ANNUAL 6000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G03 ANNUAL 7000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G03 ANNUAL 8000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G03 ANNUAL 9000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G03 ANNUAL 10000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0

G03 ANNUAL 23000 Not Applicable w/ Annual 0 0 0 0 0 0 0 0 0 0 0 0 0
Appendix E

Statewide Population Exposure Estimate Modeling Memorandums
E-1

Memorandum 1. Analysis and Population Exposure Estimates for Perchloroethylene

Needs Assessment for Brake Cleaning Products, Updated With 1997 Data (April 7, 1999) 
California Environmental Protection Agency E-2

Printed on Recycled Paper

Winston H.

Hickox

Secretary for

Environmental

Protection

____________________________________________________________________________ Air Resources Board

Alan C. Lloyd, Ph.D.

Chairman

2020 L Street • P.O. Box 2815 • Sacramento, California 95812 • www.arb.ca.gov Gray Davis

Governor

MEMORANDUM

TO: Todd Wong, Manager

Emissions Evaluation Section 

Stationary Source Division

FROM: Bob Effa, Manager

Client Support Services Section

Planning & Technical Support Division

DATE: April 7, 1999

SUBJECT: ANALYSIS AND POPULATION EXPOSURE ESTIMATES FOR

PERCHLOROETHYLENE NEEDS ASSESSMENT FOR BRAKE CLEANING

PRODUCTS, UPDATED WITH 1997 DATA 

 

This memorandum is in response to your request for an update of an additional year of

data to our March 26, 1998, memo of the same subject regarding an analysis of ambient

perchloroethylene data and population-weighted exposure. All remarks regarding data and

methods used in the previous memo apply to this work. Due to time constraints, we did not

attempt to refine the previous analyses. All tables of results follow the same format as those in

the March 26, 1998, memo, with the addition of 1997 statistics. The same information for 

1990-1996 are reprinted for ease of comparison. In addition, a table displaying site names and

their site numbers is part of the new Appendix. The following highlights some additional

information.

ADDITIONAL DATA

This analysis is based on ambient data collected by the Air Resources Board (ARB) and

compiled in the ARB Air Toxics database. The 1997 data were extracted on March 29, 1999. 

Thus, this analysis does not reflect any changes that may have occurred since that time. In 1997,

one site in the San Francisco Bay Area (Richmond) closed and was replaced by a site in San

Pablo. Also, the addition of the Salton Sea Air Basin added Calexico to the monitoring network. 

Since this site only has data from July 1995 to December 1997, and this analysis examines

perchloroethylene exposure trends from 1990 to 1997, the data from this site were not used in the

calculation of population exposure.
E-3

Missing data points in 1997

During the analysis of 1997 data, we encountered 5 sites with missing data as shown in

Table 1. To develop the population-weighted perchloroethylene exposure estimates, we had to

populate the data set with the most accurate data estimates available for the calculation of the

mean of monthly means. In the case of Richmond being replaced by San Pablo in the San

Francisco Bay Area, we simply combined the data into one set for one site (Richmond). For the

other sites with missing 1997 data, we incorporated 1996 data in the same manner used in our

previous memo. Riverside-Rubidoux had only one value for 1997; therefore, we used its 1996

data completely in the calculation of population-weighted exposure.

 

TABLE 1

Perchloroethylene Data Analysis

Missing Values in 1997 Data Set and

the Mean of Monthly Means Based on Replaced Data

Site Name Year Month(s) Missing Calculated Mean of

Monthly Means

Richmond-13th St 1997 May-Dec 0.040 ppbv

San Pablo-El Portal 1997 Jan-April (replaces Richmond)

Chico-Manzanita Ave 1997 May 0.040 ppbv

Fremont-Chapel Way 1997 March-September 0.044 ppbv

Los Angeles-N. Main St 1997 Aug-September 0.324 ppbv

Riverside-Rubidoux 1997 February-Dec 0.175 ppbv

There were no unusual observations in 1997, hence no need for an update to Table 2 of

our previous memo.

CLARIFICATION ON METHODOLOGY

Although we used the same methodology as that in the March 26, 1998 memo, some

clarification is in order.

On page 5 of the previous memo, in the second paragraph of the “Methodology” section,

the calculation of population exposure estimates for basins other than the South Coast and San

Francisco Bay reduces to using the basin-wide mean of monthly mean concentrations, with

missing values handled as described above.

On page 6 of the previous memo, the second sentence should state that “the overall

statewide population-weighted exposure was calculated by multiplying the estimated annual

average perchloroethylene exposure for a given air basin by its population, added across all
E-4

basins, then divided by the total population of the state”. In other words, the statewide exposure

estimate is a weighted average of the basin exposures, with weights determined by the basin

populations.

On page 8 of the previous memo, the last paragraph should detail the calculation of basinspecific summary statistics as follows. The minimum, maximum, arithmetic mean, standard

deviation and the number of sites are calculated from all values from all sites within the basin. 

For the basin mean of monthly means, the basin monthly mean is first calculated for each month

based on site means for the month. Then the twelve basin monthly means are averaged to obtain

the basin-wide annual mean of monthly means. Missing 1997 data have been estimated using

1996 information in the calculation of basin-wide mean of monthly means.

UNCERTAINTY AND LIMITATIONS OF ANALYSIS

There are a number of factors that contribute to uncertainty in the data and in the

conclusions drawn from the data. These are not necessarily easy to quantify. Three such factors

are discussed below, and they underscore the need to use caution when drawing conclusions from

a limited set of data.

One source of uncertainty in our results is attributable to having a very limited number of

sites throughout the state and to the infrequency of sampling. As discussed in the 

March 26, 1998, memo, the statewide population-weighted perchloroethylene exposure is

calculated based on a limited data set derived from a statewide network of only 21 or 22 sites that

collect one 24-hour sample every twelve days. 

 

MLD conducts performance audits of the toxics program through both laboratory and

field audits. Laboratory audits test the analytical methods and are conducted semi-annually. 

Field audits test the accuracy of the full toxics sampling procedure through a method referred to

as “through-the-probe” (TTP) performance audits. These audits test the sample collection,

transport, storage and analytical integrity of the toxics sampling effort. TTP audits are quite time

consuming and are only conducted annually at each site. MLD publishes the results on the

Internet. For perchloroethylene, the latest TTP audit information on the ARB web site indicates

an average accuracy for the 20-plus sites to range from -21.5% to +7.2% between 1993 and 1997. 

Yet another assumption to keep in mind is that the ambient concentrations of

perchloroethylene we used in our analysis represent only outdoor exposures. Essentially, the

exposure estimates assume 24 hours a day of outdoor exposure, without considering indoor

exposure to this compound. Therefore, caution should be exercised when using these population

exposure estimates.

RESULTS

The results of the exposure analysis are summarized in Table 3, with 1997 results added

to the far-right column. The estimated statewide population-weighted perchloroethylene
E-5

exposure, shown at the bottom of the table, decreases from 0.203 ppb-year/person in 1996 to

0.168 ppb-year/person in 1997. The general trend for statewide perchloroethylene populationweighted exposure is downward in all basins, with the exception occurring in San Francisco Air

Basin (slight increase from 0.068 in 1996 to 0.071 ppb-year/person in 1997).

TABLE 3

Estimated Air Basin Population-Weighted* Perchloroethylene Exposure

based on 1990 Census (ppb-year/person**)

Air Basin 1990 1991 1992 1993 1994 1995 1996 1997 

South Coast 0.590 0.542 0.430 0.472 0.410 0.392 0.330 0.264

South Central Coast 0.181 0.160 0.124 0.095 0.110 0.100 0.104 0.081

San Diego 0.280 0.261 0.262 0.193 0.204 0.244 0.133 0.124

San Francisco 0.196 0.223 0.158 0.124 0.082 0.091 0.068 0.071

San Joaquin Valley 0.121 0.131 0.105 0.410 0.067 0.070 0.064 0.056

Sacramento Valley 0.070 0.075 0.058 0.051 0.181 0.053 0.054 0.053

Air Basin Population Data Used in Calculating

Statewide Perchloroethylene Exposure

Air Basin 1990 1991 1992 1993 1994 1995 1996 1997

South Coast 10684933 10910823 11124105 11206222 11298530 11372003 11441517 11608906

South Central Coast 1041100 1055600 1072600 1080800 1092900 1104100 1108500 1128000

San Diego 2511400 2560800 2611500 2625100 2650700 2669200 2694900 2763400

San Francisco 4324700 4377500 4451700 4511100 4543300 4569800 4649400 4743500

San Joaquin Valley 1977876 2040876 2097395 2130385 2158376 2192027 2226921 2260164

Sacramento Valley 1377350 1413279 1440859 1458943 1469597 1482705 1502236 1524248

SUM 21917359 22358878 22798159 23012550 23213403 23389835 23623474 24028218

Estimated Statewide Population-Weighted Perchloroethylene Exposure

ppb-year/person**

Statewide

WTD AVG

0.382 0.362 0.290 0.322 0.262 0.251 0.203 0.168

* Only air basins with perchloroethylene monitoring included in this table. Air basin population-weighted exposure is calculated

 using mean of monthly means for all sites within basin.

** Population exposure units are a concentration for a given duration per person; For this analysis, the units are ppb-year/person.
E-6

In summary, this exposure analysis was developed with data from the six air basins listed

above. The South Coast and San Francisco Bay basins were population-weighted using census

tract data, and the rest of the basins were estimated using basin-wide annual mean of monthly 

mean concentrations. The six areas represent approximately 72% of the statewide population. 

Details of the analysis methods can be found in the March 26, 1998, memo.

SUMMARY TABLES IN APPENDIX

The site and air basin annual summary statistics have been updated with 1997 results. 

Table A-3 has also been added to aid in identifying the sites.

cc: Bart Croes, PTSD

 Hien Tran, PTSD
E-7

APPENDIX

TABLE A-1

Site Summary Table

Annual Site Specific Summary Statistics

ARB 

SITE

YEAR Air

 Basin

County NO_

OBS

Site 

Mean

(ppbv)

Standard

Deviation

(ppbv)

Mean of

Monthly

Mean

(ppbv)

Site 

Maximum

(ppbv)

Site

Minimum

(ppbv)

7000069 1990 SC LA 31 1.193 1.087 1.191 5.000 0.200

7000069 1991 SC LA 29 0.761 0.615 0.785 2.400 0.070

7000069 1992 SC LA 30 0.615 0.305 0.609 1.500 0.110

7000069 1993 SC LA 33 0.601 0.472 0.620 1.700 0.040

7000069 1994 SC LA 29 0.641 0.530 0.663 2.100 0.040

7000069 1995 SC LA 31 0.494 0.360 0.487 1.700 0.030

7000069 1996 SC LA 30 0.428 0.230 0.440 1.400 0.090

7000069 1997 SC LA 29 0.379 0.234 0.356 1.200 0.100 

7000072 1990 SC LA 31 0.475 0.359 0.477 1.500 0.090

7000072 1991 SC LA 29 0.341 0.292 0.355 1.100 0.040

7000072 1992 SC LA 30 0.353 0.247 0.349 1.200 0.100

7000072 1993 SC LA 32 0.384 0.462 0.433 1.500 0.010

7000072 1994 SC LA 30 0.301 0.335 0.321 1.300 0.010

7000072 1995 SC LA 31 0.317 0.346 0.318 1.600 0.030

7000072 1996 SC LA 25 0.241 0.266 0.226 1.100 0.010

7000072 1997 SC LA 30 0.228 0.182 0.225 0.500 0.020 

7000087 1990 SC LA 29 0.545 0.256 0.551 1.100 0.240

7000087 1991 SC LA 28 0.608 0.540 0.604 2.800 0.070

7000087 1992 SC LA 31 0.519 0.209 0.536 1.000 0.200

7000087 1993 SC LA 26 0.535 0.326 0.588 1.100 0.050

7000087 1994 SC LA 30 0.522 0.425 0.503 2.000 0.030

7000087 1995 SC LA 31 0.581 0.380 0.574 1.400 0.060

7000087 1996 SC LA 28 0.492 0.315 0.502 1.500 0.120

7000087 1997 SC LA 22 0.339 0.150 0.337 0.700 0.060 

3300144 1990 SC RIV 28 0.235 0.127 0.237 0.440 0.030

3300144 1991 SC RIV 29 0.266 0.200 0.276 0.870 0.060

3300144 1992 SC RIV 30 0.200 0.119 0.201 0.420 0.020

3300144 1993 SC RIV 29 0.199 0.167 0.198 0.700 0.020

3300144 1994 SC RIV 31 0.184 0.181 0.191 0.950 0.020

3300144 1995 SC RIV 31 0.183 0.146 0.177 0.530 0.030

3300144 1996 SC RIV 31 0.178 0.200 0.176 1.100 0.040

3300144 1997 SC RIV 1 0.050 n/a 0.050 0.050 0.050 

3600175 1990 SC SBD 27 0.434 0.201 0.423 1.000 0.210

3600175 1991 SC SBD 28 0.675 1.233 0.717 6.800 0.150
ARB 

SITE

YEAR Air

 Basin

County NO_

OBS

Site 

Mean

(ppbv)

Standard

Deviation

(ppbv)

Mean of

Monthly

Mean

(ppbv)

Site 

Maximum

(ppbv)

Site

Minimum

(ppbv)

E-8

3600175 1992 SC SBD 27 0.360 0.180 0.364 0.680 0.070

3600175 1993 SC SBD 29 0.392 0.286 0.398 1.100 0.040

3600175 1994 SC SBD 31 0.284 0.165 0.286 0.820 0.030

3600175 1995 SC SBD 31 0.265 0.143 0.263 0.550 0.060

3600175 1996 SC SBD 28 0.203 0.122 0.199 0.530 0.050

3600175 1997 SC SBD 30 0.198 0.090 0.193 0.400 0.070 

4200388 1990 SCC SBA 27 0.171 0.117 0.176 0.540 0.040

4200388 1991 SCC SBA 34 0.133 0.093 0.124 0.420 0.040

4200388 1992 SCC SBA 28 0.098 0.057 0.095 0.310 0.020

4200388 1993 SCC SBA 31 0.075 0.055 0.075 0.280 0.020

4200388 1994 SCC SBA 30 0.092 0.118 0.095 0.490 LOD

4200388 1995 SCC SBA 29 0.075 0.062 0.082 0.280 0.020

4200388 1996 SCC SBA 30 0.120 0.253 0.120 1.400 0.010

4200388 1997 SCC SBA 29 0.103 0.088 0.095 0.300 0.010 

5600434 1990 SCC VEN 29 0.190 0.115 0.199 0.520 0.030

5600434 1991 SCC VEN 28 0.186 0.136 0.192 0.670 0.040

5600434 1992 SCC VEN 29 0.149 0.097 0.152 0.450 0.020

5600434 1993 SCC VEN 28 0.116 0.108 0.111 0.580 0.020

5600434 1994 SCC VEN 29 0.129 0.124 0.122 0.490 0.010

5600434 1995 SCC VEN 31 0.126 0.110 0.125 0.440 0.020

5600434 1996 SCC VEN 30 0.087 0.058 0.088 0.300 0.030

5600434 1997 SCC VEN 29 0.061 0.046 0.068 0.200 0.010 

8000114 1990 SD SD 31 0.235 0.107 0.236 0.480 0.080

8000114 1991 SD SD 30 0.228 0.129 0.229 0.530 0.060

8000114 1992 SD SD 30 0.213 0.130 0.208 0.650 0.060

8000114 1993 SD SD 31 0.141 0.110 0.144 0.530 0.020

8000114 1994 SD SD 31 0.123 0.121 0.132 0.510 LOD

8000114 1995 SD SD 29 0.147 0.133 0.146 0.540 0.020

8000114 1996 SD SD 27 0.124 0.100 0.129 0.450 0.020

8000114 1997 SD SD 29 0.111 0.099 0.102 0.400 0.010 

8000131 1990 SD SD 31 0.324 0.258 0.329 1.100 0.050

8000131 1991 SD SD 29 0.293 0.268 0.308 1.300 0.040

8000131 1992 SD SD 29 0.311 0.222 0.319 0.800 0.060

8000131 1993 SD SD 28 0.245 0.200 0.256 0.890 0.020

8000131 1994 SD SD 29 0.285 0.321 0.291 1.600 0.010

8000131 1995 SD SD 29 0.342 0.585 0.352 3.200 0.040

8000131 1996 SD SD 30 0.142 0.149 0.168 0.580 0.020

8000131 1997 SD SD 26 0.147 0.127 0.146 0.500 0.010 
ARB 

SITE

YEAR Air

 Basin

County NO_

OBS

Site 

Mean

(ppbv)

Standard

Deviation

(ppbv)

Mean of

Monthly

Mean

(ppbv)

Site 

Maximum

(ppbv)

Site

Minimum

(ppbv)

E-9

6000336 1990 SFBA ALA 30 0.187 0.137 0.189 0.550 0.040

6000336 1991 SFBA ALA 30 0.210 0.146 0.210 0.540 0.020

6000336 1992 SFBA ALA 30 0.136 0.119 0.134 0.630 0.030

6000336 1993 SFBA ALA 30 0.114 0.103 0.114 0.450 0.010

6000336 1994 SFBA ALA 31 0.095 0.072 0.086 0.290 LOD

6000336 1995 SFBA ALA 30 0.121 0.077 0.118 0.290 0.030

6000336 1996 SFBA ALA 31 0.068 0.043 0.069 0.210 0.010

6000336 1997 SFBA ALA 13 0.062 0.066 0.063 0.200 0.010 

0700433 1990 SFBA CC 29 0.121 0.070 0.121 0.300 0.030

0700433 1991 SFBA CC 29 0.148 0.077 0.147 0.310 0.030

0700433 1992 SFBA CC 29 0.097 0.055 0.094 0.240 0.020

0700433 1993 SFBA CC 30 0.092 0.081 0.092 0.420 0.020

0700433 1994 SFBA CC 31 0.057 0.057 0.056 0.260 LOD

0700433 1995 SFBA CC 30 0.043 0.025 0.043 0.100 0.010

0700433 1996 SFBA CC 31 0.030 0.023 0.031 0.090 LOD

0700433 1997 SFBA CC 9 0.068 0.060 0.066 0.200 0.010 

0700440 1990 SFBA CC 28 0.325 0.248 0.337 1.000 0.040

0700440 1991 SFBA CC 29 0.438 0.450 0.419 1.700 0.030

0700440 1992 SFBA CC 31 0.391 0.404 0.390 1.600 0.040

0700440 1993 SFBA CC 30 0.207 0.254 0.204 1.100 0.010

0700440 1994 SFBA CC 32 0.102 0.099 0.098 0.390 LOD

0700440 1995 SFBA CC 30 0.157 0.242 0.147 1.100 0.020

0700440 1996 SFBA CC 31 0.082 0.112 0.082 0.600 0.010

0700440 1997 SFBA CC 29 0.097 0.130 0.102 0.400 0.010 

0700445 1997 SFBA CC 20 0.030 0.044 0.028 0.200 0.005 

4300382 1990 SFBA SCL 27 0.163 0.127 0.161 0.530 0.050

4300382 1991 SFBA SCL 28 0.152 0.098 0.153 0.410 0.040

4300382 1992 SFBA SCL 31 0.100 0.073 0.100 0.370 0.030

4300382 1993 SFBA SCL 30 0.096 0.088 0.094 0.310 0.010

4300382 1994 SFBA SCL 31 0.072 0.091 0.064 0.440 LOD

4300382 1995 SFBA SCL 30 0.074 0.070 0.069 0.350 0.020

4300382 1996 SFBA SCL 31 0.069 0.079 0.068 0.310 LOD

4300382 1997 SFBA SCL 27 0.099 0.122 0.097 0.500 0.005 

9000306 1990 SFBA SF 28 0.191 0.103 0.199 0.390 0.040

9000306 1991 SFBA SF 26 0.226 0.182 0.229 0.810 0.030

9000306 1992 SFBA SF 31 0.133 0.081 0.131 0.360 0.030

9000306 1993 SFBA SF 28 0.133 0.108 0.133 0.480 0.010

9000306 1994 SFBA SF 30 0.105 0.100 0.105 0.390 0.010

9000306 1995 SFBA SF 29 0.097 0.083 0.092 0.380 0.020
ARB 

SITE

YEAR Air

 Basin

County NO_

OBS

Site 

Mean

(ppbv)

Standard

Deviation

(ppbv)

Mean of

Monthly

Mean

(ppbv)

Site 

Maximum

(ppbv)

Site

Minimum

(ppbv)

* Site 1500203 without 28 ppbv value included E-10

9000306 1996 SFBA SF 31 0.084 0.085 0.084 0.420 0.010

9000306 1997 SFBA SF 29 0.065 0.054 0.064 0.200 0.010 

1000246 1990 SJV FRE 27 0.117 0.095 0.119 0.470 0.040

1000246 1991 SJV FRE 30 0.140 0.128 0.142 0.690 0.020

1000246 1992 SJV FRE 30 0.103 0.055 0.102 0.270 0.040

1000246 1993 SJV FRE 30 0.098 0.091 0.100 0.450 0.020

1000246 1994 SJV FRE 31 0.063 0.067 0.062 0.250 LOD

1000246 1995 SJV FRE 30 0.068 0.071 0.065 0.310 0.020

1000246 1996 SJV FRE 31 0.040 0.029 0.041 0.150 0.010

1000246 1997 SJV FRE 29 0.044 0.028 0.042 0.100 0.010 

1500203 1990 SJV KER 32 0.093 0.058 0.087 0.290 0.030

1500203 1991 SJV KER 29 0.126 0.112 0.127 0.520 0.030

1500203 1992 SJV KER 31 0.077 0.043 0.075 0.200 0.030

1500203 1993 SJV KER 30 1.299 5.306 1.481 28.000 0.010

1500203* 1993 SJV KER 29 0.378 1.678 0.317 9.100 0.010

1500203 1994 SJV KER 9 0.059 0.060 0.050 0.210 0.020

1500255 1994 SJV KER 23 0.054 0.072 0.055 0.330 LOD

1500255 1995 SJV KER 32 0.098 0.182 0.092 1.000 0.010

1500255 1996 SJV KER 32 0.104 0.264 0.119 1.500 LOD

1500255 1997 SJV KER 32 0.036 0.035 0.036 0.200 0.005 

3900252 1990 SJV SJ 30 0.129 0.068 0.129 0.300 0.040

3900252 1991 SJV SJ 29 0.115 0.050 0.113 0.220 0.040

3900252 1992 SJV SJ 28 0.120 0.076 0.120 0.380 0.040

3900252 1993 SJV SJ 34 0.125 0.173 0.120 0.860 0.020

3900252 1994 SJV SJ 31 0.066 0.062 0.066 0.240 LOD

3900252 1995 SJV SJ 30 0.063 0.044 0.061 0.220 0.020

3900252 1996 SJV SJ 31 0.069 0.075 0.068 0.350 0.010

3900252 1997 SJV SJ 28 0.096 0.114 0.095 0.400 0.005 

5000568 1990 SJV STA 31 0.144 0.097 0.145 0.370 0.040

5000568 1991 SJV STA 30 0.142 0.173 0.150 0.870 0.020

5000568 1992 SJV STA 31 0.120 0.140 0.118 0.790 0.030

5000568 1993 SJV STA 30 0.116 0.178 0.109 0.850 0.020

5000568 1994 SJV STA 31 0.093 0.198 0.087 1.100 LOD

5000568 1995 SJV STA 30 0.052 0.053 0.053 0.230 0.010

5000568 1996 SJV STA 31 0.043 0.042 0.044 0.220 0.010

5000568 1997 SJV STA 29 0.049 0.061 0.050 0.300 0.005 

1300698 1997 SS IMP 30 0.105 0.161 0.099 0.800 0.005 

0400628 1992 SV BUT 16 0.053 0.033 0.051 0.120 LOD

0400628 1993 SV BUT 30 0.056 0.046 0.057 0.190 LOD
ARB 

SITE

YEAR Air

 Basin

County NO_

OBS

Site 

Mean

(ppbv)

Standard

Deviation

(ppbv)

Mean of

Monthly

Mean

(ppbv)

Site 

Maximum

(ppbv)

Site

Minimum

(ppbv)

E-11

0400628 1994 SV BUT 31 0.299 1.376 0.266 7.700 LOD

0400628 1995 SV BUT 30 0.052 0.052 0.047 0.210 0.010

0400628 1996 SV BUT 31 0.048 0.054 0.049 0.260 LOD

0400628 1997 SV BUT 28 0.041 0.058 0.039 0.300 0.005 

0400633 1990 SV BUT 29 0.047 0.016 0.047 0.080 0.020

0400633 1991 SV BUT 28 0.055 0.025 0.054 0.110 0.020

0400633 1992 SV BUT 15 0.047 0.024 0.046 0.090 0.020

3100822 1993 SV PLA 23 0.045 0.024 0.045 0.090 0.010

3100822 1994 SV PLA 31 0.062 0.080 0.065 0.440 LOD

3100822 1995 SV PLA 30 0.054 0.034 0.051 0.160 0.010

3100822 1996 SV PLA 30 0.060 0.070 0.061 0.340 0.010

3100822 1997 SV PLA 29 0.065 0.061 0.065 0.200 0.010 

3400293 1990 SV SAC 28 0.092 0.049 0.095 0.260 0.040

3400293 1991 SV SAC 29 0.095 0.047 0.094 0.230 0.030

3400293 1992 SV SAC 31 0.075 0.039 0.076 0.180 0.020

3400293 1993 SV SAC 6 0.053 0.010 0.054 0.070 0.040
E-12

TABLE A-2

Air Basin Summary Table

Air Basin Annual Summary Statistics

Air 

Basin

Year Number 

of Sites

Air Basin

Arithmetic

Mean 

(ppbv)

Standard

Deviation

(ppbv)

Air Basin

Mean of

Monthly

Means (ppbv)

Air Basin

Maximum

(ppbv)

Air Basin

Minimum

(ppbv)

SC 1990 5 0.588 0.636 0.576 5.000 0.030

SC 1991 5 0.529 0.694 0.530 6.800 0.040

SC 1992 5 0.411 0.263 0.409 1.500 0.020

SC 1993 5 0.424 0.389 0.422 1.700 0.010

SC 1994 5 0.383 0.387 0.386 2.100 0.010

SC 1995 5 0.368 0.327 0.368 1.700 0.030

SC 1996 5 0.309 0.264 0.309 1.500 0.010

SC 1997 5 0.279 0.187 0.255 1.200 0.020 

SCC 1990 2 0.181 0.115 0.181 0.540 0.030

SCC 1991 2 0.157 0.116 0.160 0.670 0.040

SCC 1992 2 0.124 0.084 0.124 0.450 0.020

SCC 1993 2 0.094 0.086 0.095 0.580 0.020

SCC 1994 2 0.110 0.121 0.110 0.490 0.005

SCC 1995 2 0.101 0.093 0.100 0.440 0.020

SCC 1996 2 0.104 0.183 0.104 1.400 0.010

SCC 1997 2 0.082 0.073 0.082 0.300 0.010 

SD 1990 2 0.280 0.201 0.280 1.100 0.050

SD 1991 2 0.260 0.210 0.261 1.300 0.040

SD 1992 2 0.261 0.186 0.262 0.800 0.060

SD 1993 2 0.190 0.166 0.193 0.890 0.020

SD 1994 2 0.201 0.251 0.204 1.600 0.005

SD 1995 2 0.244 0.432 0.244 3.200 0.020

SD 1996 2 0.134 0.128 0.133 0.580 0.020

SD 1997 2 0.128 0.114 0.124 0.500 0.010 

SFBA 1990 5 0.197 0.162 0.197 1.000 0.030

SFBA 1991 5 0.235 0.255 0.235 1.700 0.020

SFBA 1992 5 0.173 0.225 0.172 1.600 0.020

SFBA 1993 5 0.128 0.147 0.128 1.100 0.010

SFBA 1994 5 0.086 0.086 0.086 0.440 0.005

SFBA 1995 5 0.098 0.129 0.098 1.100 0.010

SFBA 1996 5 0.067 0.077 0.067 0.600 0.005

SFBA 1997 5 0.074 0.095 0.070 0.500 0.005 

SJV 1990 4 0.121 0.082 0.121 0.470 0.030
Air 

Basin

Year Number 

of Sites

Air Basin

Arithmetic

Mean 

(ppbv)

Standard

Deviation

(ppbv)

Air Basin

Mean of

Monthly

Means (ppbv)

Air Basin

Maximum

(ppbv)

Air Basin

Minimum

(ppbv)

E-13

SJV 1991 4 0.131 0.123 0.131 0.870 0.020

SJV 1992 4 0.104 0.088 0.105 0.790 0.030

SJV 1993 4 0.400 2.630 0.410 28.000 0.010

SJV* 1993 4 0.176 0.823 0.179 9.100 0.010

SJV 1994 5 0.069 0.113 0.067 1.100 0.005

SJV 1995 4 0.071 0.105 0.070 1.000 0.010

SJV 1996 4 0.064 0.142 0.064 1.500 0.005

SJV 1997 4 0.055 0.070 0.056 0.400 0.005 

SS 1997 1 0.105 0.161 0.099 0.800 0.005 

SV 1990 2 0.069 0.042 0.070 0.260 0.020

SV 1991 2 0.075 0.043 0.075 0.230 0.020

SV 1992 3 0.063 0.036 0.058 0.180 0.005

SV 1993 3 0.051 0.036 0.051 0.190 0.005

SV 1994 2 0.181 0.974 0.181 7.700 0.005

SV 1995 2 0.053 0.043 0.053 0.210 0.010

SV 1996 2 0.054 0.062 0.054 0.340 0.005

SV 1997 2 0.053 0.061 0.053 0.300 0.005 

* SJV value with 28 ppbv value excluded
E-14

TABLE A-3

Site Identification Table

Site Number and Site Name, by Basin and County

ARB Site Site Name Air Basin County

7000069 Burbank-W Palm Avenue SC LA

7000072 North Long Beach SC LA

7000087 Los Angeles-North Main Street SC LA

3300144 Riverside-Rubidoux SC RIV

3600175 Upland-San Bernardino Road SC SBD

4200388 Santa Barbara-W Carillo Street SCC SBA

5600434 Simi Valley-Cochran Street SCC VEN

8000114 Chula Vista SD SD

8000131 El Cajon-Redwood Avenue SD SD

6000336 Fremont-Chapel Way SFBA ALA

0700433 Richmond-13th Street SFBA CC

0700440 Concord-2975 Treat Blvd SFBA CC

0700445 San Pablo-El Portal SFBA CC

4300382 San Jose-4th Street SFBA SCL

9000306 San Francisco-Arkansas Street SFBA SF

1000246 Fresno-1st Street SJV FRE

1500255 Bakersfield-5558 California Avenue SJV KER

3900252 Stockton-Hazelton Street SJV SJ

5000568 Modesto-14th Street SJV STA

1300698 Calexico-Ethel Street SS IMP

0400628 Chico-Manzanita Avenue SV BUT

3100822 Roseville-N Sunrise Blvd SV PLA
E-15

Memorandum 2. Analysis and Population Exposure Estimates for Perchloroethylene

Needs Assessment for Brake Cleaning Products (March 26, 1998) 
E-16

 Cal/EPA

California

Environmental

Protection

Air Resources

Board

P.O. Box 2815

2020 L Street

Sacramento, CA

95812-2815

http://www.arb.ca.g

ov

 

Pete Wilson

Governor

Peter M.

Rooney

Secretary for

Environmental

Protection

MEMORANDUM

TO: Todd Wong

Stationary Source Division

FROM: Bob Effa

Technical Support Division

DATE: March 26, 1998

SUBJECT: ANALYSIS AND POPULATION EXPOSURE ESTIMATES

FOR PERCHLOROETHYLENE NEEDS ASSESSMENT

FOR BRAKE CLEANING PRODUCTS 

This memorandum is in response to your request for an analysis of ambient

perchlorethylene data and population-weighted exposure. It is our understanding that

this analysis is to be used for a perc needs assessment of brake repair facilities to

serve as the basis for determining whether an airborne toxic control measure (ATCM)

is needed for these products. This analysis is based on ambient data, and as such,

includes perchlorethylene emissions from all sources. There is no way to differentiate

in the ambient air between perchloroethylene emissions from one source versus

another. If the potential risk from brake cleaning products alone is to be assessed,

the contribution from other sources would need to be quantified and subtracted from

the ambient data. 

BACKGROUND

This analysis is based on ambient data collected by the Air Resources Board

(ARB) and compiled in the ARB Air Toxics database. The data used in this analysis

cover the time period from January 2, 1990 to December 29, 1996. All data used in

this analysis were extracted on November 14, 1997. As of February 25, 1998, there

have been no changes to the data. This analysis does not reflect any changes that may

have occurred since that time. The data used in this analysis are available on CD

(California Ambient Air Quality Data CD# TSD-97-008) from the Technical Support

Division (TSD).
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DATA

Ambient Sampling and Analysis

Perchloroethylene data are collected by the ARB toxics sampling network,

which currently consists of 21 monitoring sites located throughout the state. All data

used in this analysis were collected during routine toxics pollutant monitoring. They

come from a total of 24 sites. Seventeen of these sites have been in operation from

1990 to 1996. Three sites have been closed and replaced by three new sites in the

same general area (Bakersfield-Chester Ave with Bakersfield-California Ave, Citrus

Heights-Sunrise Blvd with Roseville N. Sunrise Blvd, and Chico-Salem St with

Chico-Manzanita Ave). The 24th site, in Calexico, has been in operation since July,

1995. Since this site only has data for one complete year (1996), and this analysis

examines perchloroethylene trends over 7 years, the data from this site were not used

in this analysis. There is also a 25th site at Fresno-Olive St., but this site has only one

observation and is being discarded. As noted, some sites have moved within air basin

boundaries, and this move did not pose a problem for the purpose of our analysis. 

The data analysis and population exposure estimates presented below are based

on data collected from the ARB toxics sampling network. These data are collected

over a 24 hour period every twelve days by the Monitoring and Laboratory Division

(MLD). The data are analyzed by MLD staff using Method MLD052 (Cryogenic

Trap Preconcentration with Capillary Column Gas Chromatography-PID/ECD

Detectors). Perchloroethylene concentrations are measured using Electron Capture

Detector (ECD).

The number of samples available per site during the study period ranged from

42 to 213 observations. Of the 4206 observations collected during this time, 35 were

below the limit of detection (LOD) of 0.01 ppbv for the study period. These values

pose a problem to the analysis but they cannot be ignored since a mean calculated

without these observations would overestimate the true mean. To account for these

below LOD values, we estimated their values to be 1⁄2 of the LOD. 

Missing data points

In the course of analyzing the data for this analysis, we found that some data

points were missing. This is to be expected, but it can pose problems to the analysis. 

If the pollutant being measured has seasonal patterns, and several points are missing

from the same season, the analysis results could be skewed either high or low. If

there are no data collected at a given site during a month, a mean of monthly means

cannot be calculated for that year and the rest of the data for that site/year must be

thrown out. 

During this analysis, we encountered 8 sites with missing data as shown in

Table 1. To develop the population-weighted perchloroethylene exposure estimates,

we had to populate the data set with the most accurate data estimates available. We
E-18

used two different methods to estimate the missing data. The first method applied to

five sites where data were missing for only one month, with data from adjacent

months available. For these sites, we simply took the average of the monthly means

from the two adjacent months to impute the missing values. The second method was

applied to the remaining three sites. One site was missing only one month of data,

but it did not have a value for the previous month available as it was the first month

of our sample period (January 1990). The other two sites were missing a three month

block of data. All three sites used the same methodology to estimate the missing data. 

For these sites, we took the mean of monthly means for the months of data available,

and for the same months of data in an adjacent (following) year. From this data we

calculated the ratio of the mean of monthly means. To complete the data set, we took

the months with missing data and populated them with data from an adjacent

(following) year. To correct for different magnitudes of emissions from the two

years, this data was then adjusted using the ratio of mean of monthly means. For

example, we will look at the January 1990 value. To estimate the missing value, we 

calculated a mean of monthly means using the remaining months of the year (1990)

from the site with missing data. We then calculated a mean of monthly means for the

following year (1991) using the same months of data. The next step was to calculate

the ratio of means of monthly means to account for the difference in air quality for the

two years of interest. The January (1990) monthly mean was then imputed by

multiplying the January (1991) value by the ratio of the means of monthly means to

more accurately describe the missing value. 

A simpler approach would have been to calculate a mean value from the

existing data. The problem with this approach is that you would effectively be

populating the missing data with the average site value for the year. Thus, this would

not reflect any seasonal patterns the data may possess, and would result in a less

accurate estimate that could skew the analysis results. 

TABLE 1

 Perchloroethylene Data Analysis 

Missing Values in Data Set

Site Name Year Month(s) Missing Calculated Value(s)

Chula Vista 1996 September 0.127 ppbv

El Cajon-Redwood Ave 1994 December 0.458 ppbv

Richmond-13th St 1990 January 0.145 ppbv

San Francisco-Arkansas St 1990 May 0.174 ppbv
 Perchloroethylene Data Analysis 

Missing Values in Data Set

E-19

San Francisco-Arkansas St 1993 December 0.176 ppbv

Stockton-Hazelton St 1993 January 0.108 ppbv

Fresno-1st St 1990 January-March 0.140, 0.157, 0.077

ppbv

North Long Beach 1996 August-October 0.116, 0.168, 0.155

ppbv

Unusual Observation

The highest concentration reported during the study period was 28 ppbv at the

Bakersfield-Chester St. site in the San Joaquin Valley Air Basin on February 12,

1993. The second highest concentration was 9.1 ppbv at the Bakersfield-Chester St.

site on January 31, 1993. The 28 ppbv value is much higher than the remaining data

collected and is subject to scrutiny. The Monitoring and Laboratory Division (MLD)

checked and confirmed the value. There is no valid reason to discard the value, so it

remains in our database. To assess the sensitivity of our estimates to such high

concentrations, we performed two analyses by including or excluding the data point. 

When this value is compared to the remaining values at the Chester St. site, it is more

than 21 times higher than the average for that site. A brief summary of the effects of

this data point are shown in Table 2.

TABLE 2

Results of Perchloroethylene Data Analysis 

Bakersfield-Chester St Site for 1993

with 28 ppbv

value

without 28 ppbv

value

Percent

Change

Site Arithmetic Mean

Concentration

1.299 ppbv 0.378 ppbv -71%

Air Basin Arithmetic Mean

Concentration

0.400 ppbv 0.176 ppbv -56%
Results of Perchloroethylene Data Analysis 

Bakersfield-Chester St Site for 1993

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Statewide Arithmetic Mean 

Concentration

0.253 ppbv 0.207 ppbv -18%

Statewide Population-Weighted

Exposure

0.322 ppb/year 0.301 ppb/year -7%

Unless otherwise noted, all results presented in this report are calculated with

the 28 ppbv value included.

Population Data

Population data used in the exposure analysis come from two sources: the 1990

census and the California Department of Finance (DOF). The census data is used in

the South Coast and San Francisco Air Basins as an input to the population exposure

weighting program, while the DOF data is used in all areas to represent the actual

population. The study area for this analysis covers six air basins, and approximately

72% of the statewide population. 

METHODOLOGY

The population exposure estimate consists of two parts. The first part is an

estimate of the pollutant exposure in a given air basin. This will yield an average

exposure for each air basin in the study. Due to data limitations, population exposure

estimates were calculated differently for different air basins. For the South Coast Air

Basin and the San Francisco Air Basin, the exposure estimates are calculated using a

population exposure weighting program that interpolates site-specific mean of

monthly mean perchloroethylene concentrations to population values assigned to

census tract centroids (a census tract centroid is the approximate center of a United

States Census Bureau census tract). The population exposure weighting program

used 1990 census data in the South Coast and San Francisco Air Basins. There are no

growth factors available by census tract, so 1990 census data was used for the

population estimate for all years of the analysis. 

For the other air basins for which we have data, the number of monitors are too

limited to represent the entire air basin. For those areas, we limited our analysis to the

counties which had monitors. First, we computed a “basin wide” mean concentration

from the mean of monthly means of the basin. Then, we assumed that all people in

counties with monitoring sites are exposed to this estimated mean annual

concentration (i.e., if an air basin contains four counties, and only two of the counties
E-21

had monitors, the population of the two counties with monitors would be used in the

exposure analysis). The population estimates for these areas of the study used DOF

data for this step.

The results of this first step are presented in the top portion of Table 3. This is

the population-weighted perchloroethylene exposure by air basin. For example, the

per capita average concentration to which the population in the South Coast Air Basin

were exposed during 1990 was 0.590 ppb. This declined to 0.330 ppb for 1996. For

the San Joaquin Valley Air Basin, the average concentration for the population

represented by the four counties included in the analysis was 0.121 ppb in 1990,

dropping to 0.064 ppb in 1996. 

The second step of the exposure calculation was the same for all air basins. 

The overall statewide population-weighted exposure was calculated by multiplying

the estimated annual average perchloroethylene concentration for a given air basin by

its population (represented as a fraction of the total of the air basin populations in this

study). This value was calculated for each air basin in the study, and the results are

summed to create an estimated overall statewide population-weighted exposure

estimate. The DOF population figures are shown in the middle portion of Table 3.

RESULTS

The results of the exposure analysis are summarized in Table 3. The estimated

statewide perchloroethylene exposure, shown at the bottom of the table, decreases

from 0.382 to 0.203 ppbv from 1990 to 1996. The highest air basin concentrations

(shown at the top of the table ) occurred in the South Coast, where the annual mean

perchloroethylene concentrations decreased from 0.590 ppbv in 1990 to 0.330 ppbv

in 1996. The general trend for statewide is decreasing, except for a slight increase

from 1992 to 1993 due to the 28 ppbv value in the San Joaquin Valley. If the 28

ppbv value is not included in the analysis, the trend decreases for all years. 
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TABLE 3

Estimated Air Basin Population-Weighted* Perchloroethylene Exposure

ppb-year/person**

Air Basin 1990 1991 1992 1993 1994 1995 1996 

South Coast 0.590 0.542 0.430 0.472 0.410 0.392 0.330

South Central

Coast

0.181 0.160 0.124 0.095 0.110 0.100 0.104

San Diego 0.280 0.261 0.262 0.193 0.204 0.244 0.133

San Francisco 0.196 0.223 0.158 0.124 0.082 0.091 0.068

San Joaquin

Valley

0.121 0.131 0.105 0.410 0.067 0.070 0.064

Sacramento

Valley

0.070 0.075 0.058 0.051 0.181 0.053 0.054

Air Basin Population Data Used in Calculating

Statewide Perchloroethylene Exposure

Air Basin 1990 1991 1992 1993 1994 1995 1996 

South Coast 10684933 10910823 11124105 11206222 11298530 11372003 11441517 

South Central

Coast

1041100 1055600 1072600 1080800 1092900 1104100 1108500 

San Diego 2511400 2560800 2611500 2625100 2650700 2669200 2694900 

San Francisco 4324700 4377500 4451700 4511100 4543300 4569800 4649400 

San Joaquin

Valley

1977876 2040876 2097395 2130385 2158376 2192027 2226921 

Sacramento

Valley

1377350 1413279 1440859 1458943 1469597 1482705 1502236

SUM 21917359 22358878 22798159 23012550 23213403 23389835 23623474 

Estimated Statewide Population-Weighted Perchloroethylene Exposure

ppb-year/person**

Statewide

WTD AVG 0.382 0.362 0.290 0.322 0.262 0.251 0.203 

* Only air basins with perchloroethylene monitoring included in this table. Air basin population-weighted exposure is calculated

 using mean of monthly means for all sites within basin.

** Population exposure units are a concentration for a given duration per person; For this analysis, the units are ppb-year/person.

In summary, this exposure analysis was developed with data from the six areas

listed above. The South Coast and San Francisco Bay Area were populationweighted using census tract data, and the rest of the areas were population-weighted
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using county (with monitoring data) population data. The six areas represent

approximately 72% of the statewide population.

LIMITATIONS OF ANALYSIS

This analysis was designed to produce a statewide population-weighted

perchloroethylene exposure. Ideally, to complete such an analysis, daily

perchloroethylene concentrations from all areas of the state would be available. 

Unfortunately, this is not the case. Currently, our monitoring network operates on a

one in twelve day sampling schedule, at only 21 sites within six air basins throughout

California. At this time, the minimum number of sites and frequency of sampling

required to accurately represent the true statewide exposure are uncertain. Therefore,

caution should be exercised when using these exposure estimates.

SUMMARY TABLES IN APPENDIX

Annual summary statistics for each site during the study period are listed in the

appendix in the Site Summary Table. These statistics include the annual site

minimum, maximum, arithmetic mean, standard deviation, mean of monthly means,

and number of observations. The annual mean concentration for the site is calculated

as the mean of monthly means for the site. The standard deviation is calculated using

all values rather than the monthly means. When a site contains a reading below the

LOD for a particular year, the mean concentration and standard deviation are

calculated using 1⁄2 LOD as an estimate for the below LOD value. 

Basin-specific summary statistics are calculated on an annual basis and are

listed in the Appendix in the Air Basin Summary Table. These statistics are

calculated using the values from each site within an air basin. These statistics include

the minimum and maximum, the arithmetic mean, standard deviation of values from

all sites within the air basin, the mean of monthly site means, and the number of sites

in the air basin. 

cc: Bart Croes, TSD

Tom Lusk , TSD
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APPENDIX

Site Summary Table

Annual Site Specific Summary Statistics

ARB 

SITE

YEAR Air

 Basin

County NO_

OBS

Site 

Mean

(ppbv)

Standard

Deviation

(ppbv)

Mean of

Monthly

Mean

(ppbv)

Site 

Maximum

(ppbv)

Site

Minimum

(ppbv)

7000069 1990 SC LA 31 1.193 1.087 1.191 5.000 0.200

7000069 1991 SC LA 29 0.761 0.615 0.785 2.400 0.070

7000069 1992 SC LA 30 0.615 0.305 0.609 1.500 0.110

7000069 1993 SC LA 33 0.601 0.472 0.620 1.700 0.040

7000069 1994 SC LA 29 0.641 0.530 0.663 2.100 0.040

7000069 1995 SC LA 31 0.494 0.360 0.487 1.700 0.030

7000069 1996 SC LA 30 0.428 0.230 0.440 1.400 0.090

7000072 1990 SC LA 31 0.475 0.359 0.477 1.500 0.090

7000072 1991 SC LA 29 0.341 0.292 0.355 1.100 0.040

7000072 1992 SC LA 30 0.353 0.247 0.349 1.200 0.100

7000072 1993 SC LA 32 0.384 0.462 0.433 1.500 0.010

7000072 1994 SC LA 30 0.301 0.335 0.321 1.300 0.010

7000072 1995 SC LA 31 0.317 0.346 0.318 1.600 0.030

7000072 1996 SC LA 25 0.241 0.266 0.226 1.100 0.010

7000087 1990 SC LA 29 0.545 0.256 0.551 1.100 0.240

7000087 1991 SC LA 28 0.608 0.540 0.604 2.800 0.070

7000087 1992 SC LA 31 0.519 0.209 0.536 1.000 0.200

7000087 1993 SC LA 26 0.535 0.326 0.588 1.100 0.050

7000087 1994 SC LA 30 0.522 0.425 0.503 2.000 0.030

7000087 1995 SC LA 31 0.581 0.380 0.574 1.400 0.060

7000087 1996 SC LA 28 0.492 0.315 0.502 1.500 0.120

3300144 1990 SC RIV 28 0.235 0.127 0.237 0.440 0.030

3300144 1991 SC RIV 29 0.266 0.200 0.276 0.870 0.060

3300144 1992 SC RIV 30 0.200 0.119 0.201 0.420 0.020

3300144 1993 SC RIV 29 0.199 0.167 0.198 0.700 0.020

3300144 1994 SC RIV 31 0.184 0.181 0.191 0.950 0.020

3300144 1995 SC RIV 31 0.183 0.146 0.177 0.530 0.030

3300144 1996 SC RIV 31 0.178 0.200 0.176 1.100 0.040

3600175 1990 SC SBD 27 0.434 0.201 0.423 1.000 0.210

3600175 1991 SC SBD 28 0.675 1.233 0.717 6.800 0.150

3600175 1992 SC SBD 27 0.360 0.180 0.364 0.680 0.070

3600175 1993 SC SBD 29 0.392 0.286 0.398 1.100 0.040

3600175 1994 SC SBD 31 0.284 0.165 0.286 0.820 0.030

3600175 1995 SC SBD 31 0.265 0.143 0.263 0.550 0.060
ARB 

SITE

YEAR Air

 Basin

County NO_

OBS

Site 

Mean

(ppbv)

Standard

Deviation

(ppbv)

Mean of

Monthly

Mean

(ppbv)

Site 

Maximum

(ppbv)

Site

Minimum

(ppbv)

E-25

3600175 1996 SC SBD 28 0.203 0.122 0.199 0.530 0.050

4200388 1990 SCC SBA 27 0.171 0.117 0.176 0.540 0.040

4200388 1991 SCC SBA 34 0.133 0.093 0.124 0.420 0.040

4200388 1992 SCC SBA 28 0.098 0.057 0.095 0.310 0.020

4200388 1993 SCC SBA 31 0.075 0.055 0.075 0.280 0.020

4200388 1994 SCC SBA 30 0.092 0.118 0.095 0.490 LOD

4200388 1995 SCC SBA 29 0.075 0.062 0.082 0.280 0.020

4200388 1996 SCC SBA 30 0.120 0.253 0.120 1.400 0.010

5600434 1990 SCC VEN 29 0.190 0.115 0.199 0.520 0.030

5600434 1991 SCC VEN 28 0.186 0.136 0.192 0.670 0.040

5600434 1992 SCC VEN 29 0.149 0.097 0.152 0.450 0.020

5600434 1993 SCC VEN 28 0.116 0.108 0.111 0.580 0.020

5600434 1994 SCC VEN 29 0.129 0.124 0.122 0.490 0.010

5600434 1995 SCC VEN 31 0.126 0.110 0.125 0.440 0.020

5600434 1996 SCC VEN 30 0.087 0.058 0.088 0.300 0.030

8000114 1990 SD SD 31 0.235 0.107 0.236 0.480 0.080

8000114 1991 SD SD 30 0.228 0.129 0.229 0.530 0.060

8000114 1992 SD SD 30 0.213 0.130 0.208 0.650 0.060

8000114 1993 SD SD 31 0.141 0.110 0.144 0.530 0.020

8000114 1994 SD SD 31 0.123 0.121 0.132 0.510 LOD

8000114 1995 SD SD 29 0.147 0.133 0.146 0.540 0.020

8000114 1996 SD SD 27 0.124 0.100 0.129 0.450 0.020

8000131 1990 SD SD 31 0.324 0.258 0.329 1.100 0.050

8000131 1991 SD SD 29 0.293 0.268 0.308 1.300 0.040

8000131 1992 SD SD 29 0.311 0.222 0.319 0.800 0.060

8000131 1993 SD SD 28 0.245 0.200 0.256 0.890 0.020

8000131 1994 SD SD 29 0.285 0.321 0.291 1.600 0.010

8000131 1995 SD SD 29 0.342 0.585 0.352 3.200 0.040

8000131 1996 SD SD 30 0.142 0.149 0.168 0.580 0.020

6000336 1990 SFBA ALA 30 0.187 0.137 0.189 0.550 0.040

6000336 1991 SFBA ALA 30 0.210 0.146 0.210 0.540 0.020

6000336 1992 SFBA ALA 30 0.136 0.119 0.134 0.630 0.030

6000336 1993 SFBA ALA 30 0.114 0.103 0.114 0.450 0.010

6000336 1994 SFBA ALA 31 0.095 0.072 0.086 0.290 LOD

6000336 1995 SFBA ALA 30 0.121 0.077 0.118 0.290 0.030

6000336 1996 SFBA ALA 31 0.068 0.043 0.069 0.210 0.010

0700433 1990 SFBA CC 29 0.121 0.070 0.121 0.300 0.030

0700433 1991 SFBA CC 29 0.148 0.077 0.147 0.310 0.030

0700433 1992 SFBA CC 29 0.097 0.055 0.094 0.240 0.020

0700433 1993 SFBA CC 30 0.092 0.081 0.092 0.420 0.020
ARB 

SITE

YEAR Air

 Basin

County NO_

OBS

Site 

Mean

(ppbv)

Standard

Deviation

(ppbv)

Mean of

Monthly

Mean

(ppbv)

Site 

Maximum

(ppbv)

Site

Minimum

(ppbv)

* Site 1500203 without 28 ppbv value included E-26

0700433 1994 SFBA CC 31 0.057 0.057 0.056 0.260 LOD

0700433 1995 SFBA CC 30 0.043 0.025 0.043 0.100 0.010

0700433 1996 SFBA CC 31 0.030 0.023 0.031 0.090 LOD

0700440 1990 SFBA CC 28 0.325 0.248 0.337 1.000 0.040

0700440 1991 SFBA CC 29 0.438 0.450 0.419 1.700 0.030

0700440 1992 SFBA CC 31 0.391 0.404 0.390 1.600 0.040

0700440 1993 SFBA CC 30 0.207 0.254 0.204 1.100 0.010

0700440 1994 SFBA CC 32 0.102 0.099 0.098 0.390 LOD

0700440 1995 SFBA CC 30 0.157 0.242 0.147 1.100 0.020

0700440 1996 SFBA CC 31 0.082 0.112 0.082 0.600 0.010

4300382 1990 SFBA SCL 27 0.163 0.127 0.161 0.530 0.050

4300382 1991 SFBA SCL 28 0.152 0.098 0.153 0.410 0.040

4300382 1992 SFBA SCL 31 0.100 0.073 0.100 0.370 0.030

4300382 1993 SFBA SCL 30 0.096 0.088 0.094 0.310 0.010

4300382 1994 SFBA SCL 31 0.072 0.091 0.064 0.440 LOD

4300382 1995 SFBA SCL 30 0.074 0.070 0.069 0.350 0.020

4300382 1996 SFBA SCL 31 0.069 0.079 0.068 0.310 LOD

9000306 1990 SFBA SF 28 0.191 0.103 0.199 0.390 0.040

9000306 1991 SFBA SF 26 0.226 0.182 0.229 0.810 0.030

9000306 1992 SFBA SF 31 0.133 0.081 0.131 0.360 0.030

9000306 1993 SFBA SF 28 0.133 0.108 0.133 0.480 0.010

9000306 1994 SFBA SF 30 0.105 0.100 0.105 0.390 0.010

9000306 1995 SFBA SF 29 0.097 0.083 0.092 0.380 0.020

9000306 1996 SFBA SF 31 0.084 0.085 0.084 0.420 0.010

1000246 1990 SJV FRE 27 0.117 0.095 0.119 0.470 0.040

1000246 1991 SJV FRE 30 0.140 0.128 0.142 0.690 0.020

1000246 1992 SJV FRE 30 0.103 0.055 0.102 0.270 0.040

1000246 1993 SJV FRE 30 0.098 0.091 0.100 0.450 0.020

1000246 1994 SJV FRE 31 0.063 0.067 0.062 0.250 LOD

1000246 1995 SJV FRE 30 0.068 0.071 0.065 0.310 0.020

1000246 1996 SJV FRE 31 0.040 0.029 0.041 0.150 0.010

1500203 1990 SJV KER 32 0.093 0.058 0.087 0.290 0.030

1500203 1991 SJV KER 29 0.126 0.112 0.127 0.520 0.030

1500203 1992 SJV KER 31 0.077 0.043 0.075 0.200 0.030

1500203 1993 SJV KER 30 1.299 5.306 1.481 28.000 0.010

1500203* 1993 SJV KER 29 0.378 1.678 0.317 9.100 0.010

1500203 1994 SJV KER 9 0.059 0.060 0.050 0.210 0.020

1500255 1994 SJV KER 23 0.054 0.072 0.055 0.330 LOD

1500255 1995 SJV KER 32 0.098 0.182 0.092 1.000 0.010

1500255 1996 SJV KER 32 0.104 0.264 0.119 1.500 LOD
ARB 

SITE

YEAR Air

 Basin

County NO_

OBS

Site 

Mean

(ppbv)

Standard

Deviation

(ppbv)

Mean of

Monthly

Mean

(ppbv)

Site 

Maximum

(ppbv)

Site

Minimum

(ppbv)

E-27

3900252 1990 SJV SJ 30 0.129 0.068 0.129 0.300 0.040

3900252 1991 SJV SJ 29 0.115 0.050 0.113 0.220 0.040

3900252 1992 SJV SJ 28 0.120 0.076 0.120 0.380 0.040

3900252 1993 SJV SJ 34 0.125 0.173 0.120 0.860 0.020

3900252 1994 SJV SJ 31 0.066 0.062 0.066 0.240 LOD

3900252 1995 SJV SJ 30 0.063 0.044 0.061 0.220 0.020

3900252 1996 SJV SJ 31 0.069 0.075 0.068 0.350 0.010

5000568 1990 SJV STA 31 0.144 0.097 0.145 0.370 0.040

5000568 1991 SJV STA 30 0.142 0.173 0.150 0.870 0.020

5000568 1992 SJV STA 31 0.120 0.140 0.118 0.790 0.030

5000568 1993 SJV STA 30 0.116 0.178 0.109 0.850 0.020

5000568 1994 SJV STA 31 0.093 0.198 0.087 1.100 LOD

5000568 1995 SJV STA 30 0.052 0.053 0.053 0.230 0.010

5000568 1996 SJV STA 31 0.043 0.042 0.044 0.220 0.010

0400628 1992 SV BUT 16 0.053 0.033 0.051 0.120 LOD

0400628 1993 SV BUT 30 0.056 0.046 0.057 0.190 LOD

0400628 1994 SV BUT 31 0.299 1.376 0.266 7.700 LOD

0400628 1995 SV BUT 30 0.052 0.052 0.047 0.210 0.010

0400628 1996 SV BUT 31 0.048 0.054 0.049 0.260 LOD

0400633 1990 SV BUT 29 0.047 0.016 0.047 0.080 0.020

0400633 1991 SV BUT 28 0.055 0.025 0.054 0.110 0.020

0400633 1992 SV BUT 15 0.047 0.024 0.046 0.090 0.020

3100822 1993 SV PLA 23 0.045 0.024 0.045 0.090 0.010

3100822 1994 SV PLA 31 0.062 0.080 0.065 0.440 LOD

3100822 1995 SV PLA 30 0.054 0.034 0.051 0.160 0.010

3100822 1996 SV PLA 30 0.060 0.070 0.061 0.340 0.010

3400293 1990 SV SAC 28 0.092 0.049 0.095 0.260 0.040

3400293 1991 SV SAC 29 0.095 0.047 0.094 0.230 0.030

3400293 1992 SV SAC 31 0.075 0.039 0.076 0.180 0.020

3400293 1993 SV SAC 6 0.053 0.010 0.054 0.070 0.040
* SJV value with 28 ppbv value excluded

E-28

Air Basin Summary Table

Air Basin Annual Summary Statistics

Air 

Basin

Year Number 

of Sites

Air Basin

Arithmetic

Mean 

(ppbv)

Standard

Deviation

(ppbv)

Air Basin

Mean of

Monthly

Means (ppbv)

Air Basin

Maximum

(ppbv)

Air Basin

Minimum

(ppbv)

SC 1990 5 0.588 0.636 0.576 5.000 0.030

SC 1991 5 0.529 0.694 0.530 6.800 0.040

SC 1992 5 0.411 0.263 0.409 1.500 0.020

SC 1993 5 0.424 0.389 0.422 1.700 0.010

SC 1994 5 0.383 0.387 0.386 2.100 0.010

SC 1995 5 0.368 0.327 0.368 1.700 0.030

SC 1996 5 0.309 0.264 0.309 1.500 0.010

SCC 1990 2 0.181 0.115 0.181 0.540 0.030

SCC 1991 2 0.157 0.116 0.160 0.670 0.040

SCC 1992 2 0.124 0.084 0.124 0.450 0.020

SCC 1993 2 0.094 0.086 0.095 0.580 0.020

SCC 1994 2 0.110 0.121 0.110 0.490 0.005

SCC 1995 2 0.101 0.093 0.100 0.440 0.020

SCC 1996 2 0.104 0.183 0.104 1.400 0.010

SD 1990 2 0.280 0.201 0.280 1.100 0.050

SD 1991 2 0.260 0.210 0.261 1.300 0.040

SD 1992 2 0.261 0.186 0.262 0.800 0.060

SD 1993 2 0.190 0.166 0.193 0.890 0.020

SD 1994 2 0.201 0.251 0.204 1.600 0.005

SD 1995 2 0.244 0.432 0.244 3.200 0.020

SD 1996 2 0.134 0.128 0.133 0.580 0.020

SFBA 1990 5 0.197 0.162 0.197 1.000 0.030

SFBA 1991 5 0.235 0.255 0.235 1.700 0.020

SFBA 1992 5 0.173 0.225 0.172 1.600 0.020

SFBA 1993 5 0.128 0.147 0.128 1.100 0.010

SFBA 1994 5 0.086 0.086 0.086 0.440 0.005

SFBA 1995 5 0.098 0.129 0.098 1.100 0.010

SFBA 1996 5 0.067 0.077 0.067 0.600 0.005

SJV 1990 4 0.121 0.082 0.121 0.470 0.030

SJV 1991 4 0.131 0.123 0.131 0.870 0.020

SJV 1992 4 0.104 0.088 0.105 0.790 0.030

SJV 1993 4 0.400 2.630 0.410 28.000 0.010

SJV* 1993 4 0.176 0.823 0.179 9.100 0.010

SJV 1994 5 0.069 0.113 0.067 1.100 0.005

SJV 1995 4 0.071 0.105 0.070 1.000 0.010

SJV 1996 4 0.064 0.142 0.064 1.500 0.005

SV 1990 2 0.069 0.042 0.070 0.260 0.020
Air 

Basin

Year Number 

of Sites

Air Basin

Arithmetic

Mean 

(ppbv)

Standard

Deviation

(ppbv)

Air Basin

Mean of

Monthly

Means (ppbv)

Air Basin

Maximum

(ppbv)

Air Basin

Minimum

(ppbv)

* SJV value with 28 ppbv value excluded

E-29

SV 1991 2 0.075 0.043 0.075 0.230 0.020

SV 1992 3 0.063 0.036 0.058 0.180 0.005

SV 1993 3 0.051 0.036 0.051 0.190 0.005

SV 1994 2 0.181 0.974 0.181 7.700 0.005

SV 1995 2 0.053 0.043 0.053 0.210 0.010

SV 1996 2 0.054 0.062 0.054 0.340 0.005
Appendix F

Selection of Specific and Generic Facilities for ISCST3 Modeling
F-1

Appendix F. Selection of Specific and Generic Facilities for ISCST3 Modeling

The majority of the modeling performed was done using the SCREEN3 air dispersion

model because it is easy to use and allows the consideration of many modeling scenarios in a

relatively short period of time. The ISCST3 air dispersion models offers the opportunity to

perform a more refined analysis of a facility’s potential risk; however, modeling scenarios

considered under this model are more resource intensive. As a result, only a limited number of

facilities could be selected for modeling using ISCST3. Thirteen specific facilities from the site

visits as well as 3 generic facilities that were developed to represent a broad range of facilities

statewide, were selected. This appendix outlines how the specific facilities were selected, how

the generic facilities were developed, and how representative product formulations for the

generic facilities were derived.

A. Selection of the 13 Specific Facilities

The main goal in selecting the 13 specific facilities was to obtain good representation of

the five facility types (general automotive, fleets, service stations, dedicated brake shops, and

dealerships) defined in the Status Report (ARB, 1997a) in several locations throughout the state

with good population densities. In order to conduct this type of analysis, meteorological (met)

and census data needs to be available for any selected area; therefore, facilities located in areas

without met data or good census information could not be candidates for selection.

Another goal was to select facilities representing five key population areas revealed by

the site visits. Those areas are: Sacramento, Los Angeles, the San Francisco Bay Area, San

Joaquin Valley, and the North State area. Combined, these regions represent mostly urban areas

which is appropriate because the majority of California’s population lives in largely urban areas. 

Additionally, potential residential and business receptors in these areas tend to be located nearby

the automotive maintenance and repair facilities.

The site visits showed that 55 facilities were using chlorinated products, all of which

were modeled using the SCREEN3 air dispersion model. Thirty-two of these facilities showed

potential risks greater than 10 chances per million (based on Perc usage and modeling using

SCREEN3). The 10 chances per million level was selected because it is a common public risk

notification level used in many local air districts; it should not be construed as any sort of

regulatory guideline. Since public health protection is a major concern, the higher risk facilities

were selected as candidates for ISCST3 modeling so long as the above criteria was able to be

satisfied. As a result, facilities with lower risk values were selected in some cases to ensure that

all the facility types and the five population areas were represented. Using these criteria,

13 specific facilities were selected. Table F-1 summarizes the five regions, the selected met sets

for each region, and the represented facility types.
F-2

Table F-1. Met Data Sets and Facility Types per Region

Geographic Region Met Data Sets Facility Types

Los Angeles Anaheim 1981

Burbank 1958-62

LAX 1985-89

General Automotive

North State Redding 1987-89 General Automotive

Sacramento Sac Exec 1987, 1989-92

Mather AFB 1953-57

McClellan AFB 1953-57

Brake Shop

Fleet

San Francisco Bay Area Concord 1991-96

Oakland 1960-64

General Automotive

San Joaquin Valley Fresno 1985-89 Dealership

Service Station

B. Development of the 3 Generic Facilities

The purpose of developing the 3 generic facilities was to provide a mechanism for

estimating potential health impacts for all facilities statewide, including facilities located in areas

where met data is not available. The basis for the generic facilities came from the 137 site visits,

the statewide survey of automotive maintenance and repair facilities, as well as follow-up visits

and telephone calls used to verify collected information. Using this information, the universe of

facilities was separated into three representative groups: generic facility G-01 (small), generic

facility G-02 (medium), and generic facility G-03 (large).

The site visit data was analyzed to determine the source characteristics of the generic

facilities. Several approaches were considered including averaging the facility volumes over a

specified range and focusing on the smaller facility volumes. These approaches were rejected

because they would have either underestimated or overestimated potential health impacts. The

data revealed that product usage was not related to facility size which means that both low and

high usage rates can be found at small and large facilities. Additionally, a comparison of the

facility volumes showed gaps that naturally separated the facilities into five groupings or facility

size ranges. The very smallest group and largest group of facilities were excluded to avoid

unnecessarily underestimating or overestimating potential health impacts. This approach created

a rough cut of facility sizes for each generic facility.

Due to the limited availability of modeling resources, one representative building size

needed to be selected for each of the three facility size ranges. Before selecting the discrete

building size, however, the number of brake jobs that were being performed in each facility size
F-3

range was examined (note: a typical brake job can consist of either one-axle or two-axle jobs). 

The data showed that the overall number of brake jobs ranged from 1 to 160 jobs per week and

that facilities doing more brake work (and therefore using more chlorinated product) populated

all three size ranges. An interesting observation was that the facility with the greatest number of

brake jobs was at the lower end of each size range (in terms of facility volume) which indicates

that facilities at the higher end of the size range would most likely be able to handle the same

throughput. It also means that setting the building size for each generic facility at the lower end

of the range would not overestimate potential health impacts. As a result, the building

dimensions were set at the lower end of each facility size range. The throughput of brake jobs

was then set to approximate the throughput at the lower end facilities. While the throughput of

brake jobs for these facilities is higher than others in the range, it creates a health-protective

facility that can effectively handle the variations in usage rates. It also allows for the capture of

product use on other activities and, therefore, is a more realistic model of total product usage that

minimizes the frequency that a generic facility would underestimate potential health impacts. 

Table F-2 summarizes what had been developed at this point. 

Table F-2. Proposed Generic Facilities

Facility Facility Size Range

(by volume)

Proposed

Representative

Volume

Number of Brake Jobs

at Proposed Volume

[per week]

G-01 453 m3 to 2140 m3453 m318

G-02 2230 m3 to 8494 m32230 m358

G-03 9241 m3 to 37167 m310157 m354

Now that the generic facilities had been roughly identified, several quality control checks

were employed to verify that the building dimensions and throughput of brake jobs were set

properly and could adequately characterize automotive service and repair facilities statewide. 

Sales by facility size and number of service bays reported in the May 1996 Brake & Front End

Brake Repair Survey (MarketScope, 1996) were compared to site visit data to check for

consistency. This check underscores that the facility size ranges for the generic facilities are

consistent with trends that have been observed nationwide. Additionally, the number of bays that

were dedicated to brake work were compared with site visit data to determine if they were

consistent with the generic volumes and reported number of jobs per week. This comparison was

necessary to minimize the possibility that a generic facility would assume that a facility would be

doing more work than it was physically capable of doing. Finally, a random selection of

respondents to the Automotive Service Facility Questionnaire (Facility Survey) were polled to

verify the accuracy of the reported data (a copy of the survey form can be found in Appendix B). 

Additional site visits were then made to several of these facilities to obtain source characteristic

information. The information obtained from these additional site visits confirmed that the
F-4

building dimensions and throughput of brake jobs for the generic facilities was reasonable.

In order to gain an idea of the statewide representativeness of the generic facilities, the

sales/service bay distribution reported in the May 1996 Brake & Front End Brake Repair Survey

(MarketScope, 1996) and the distribution of the number of service bays per facility reported in

the Norton study (Norton, 1993) was compared to the ARB data. With this information, it was

estimated that generic facility G-01 represents approximately 37% of California automotive

service facilities, G-02 represents approximately 43%, and G-03 represents approximately 20%. 

Table F-2 summarizes the generic facility characteristics that were used in the modeling

scenarios under ISCST3. A summary of the generic facility modeling results, including

modeling input parameters and assumptions, are presented in Appendix D.

Table F-3. Summary of Generic Facility Characteristics

Facility Brake Job

Range

[per week]

Facility

Volume

 [m3]

Height

[m]

Length

[m]

Width

[m]

Number of

Brake Jobs

[per week]

Represented

Facility Types

G-01 1 to 75 453 4.9 12.2 7.6 20 Brake Shop

Dealership

General Automotive

Service Station

G-02 1 to 115 2230 7.6 21.3 13.7 60 Brake Shop

Dealership

Fleet

General Automotive

Service Station

G-03 1 to 160 10157 7.6 62.5 21.3 60 Dealership

Fleet

General Automotive

C. Development of Perc, MeCl, and TCE Usage Rates in Brake Cleaners, Carburetor

Cleaners, Engine Degreasers, and General Degreasers

An important observation made during the site visits was that products labeled as brake

cleaners, carburetor cleaners, engine degreasers, and general degreasers were often used on a

variety of tasks. For example, several facilities reported using aerosol brake cleaning products to

do engine degreasing work while others used general degreasers to clean brake parts. Many

technicians indicated that this cross usage occurs because the products in each of these categories

are designed to remove grime, grease, oil and dirt and, therefore, are suitable for tasks for which

they may not be labeled.
F-5

Since products from these categories represent a varying range of compositions with

regard to Perc, MeCl, and TCE, each category was separated into representative formulations

based on available data. The data sources for this exercise where the Facility Survey and the

1997 Consumer and Commercial Products Survey. The Facility Survey provided information on

product usage rates and was used to estimate the average cans per week of product usage in each

category. Formulation information was also extracted from this database. The 1997 Consumer

and Commercial Products Survey also contained formulation information as well as sales

information. The sales information was used to weight the relative contributions of the

formulations into one composite. The site visits also provided usage and formulation

information on brake cleaning products.

In order to simplify the presentation of data associated with this task, the contributions to

total generic facility risk from carburetor cleaners, engine degreasers, and general degreasers is

combined into two health impact estimates for each generic facility: one estimate for default

meteorology and another which is the average of the health impacts for the 10 specific met

locations. Since more information was available for brake cleaners than the other three

categories, the representative formulations derived for this category are used discretely for each

met set including the default. A summary of the representative product formulations used is

presented in Table F-4.

Table F-4. Representative Product Formulations Used in Generic Facility Modeling

Product Category

Brake Cleaners Carburetor Cleaners Engine Degreasers General Degreasers

All met locations:

o 94% Perc

o 65% Perc

Four met locations1

:

o 55% Perc, 25% MeCl

o 40% Perc, 30% MeCl, 20% TCE

o 55% Perc, 43% TCE

Single composite

based on2:

o 68% Perc

o 57% MeCl

Single composite

based on2:

o 47% Perc

o 99% TCE

Single composite 

based on2:

o 24% Perc

o 41% Perc, 55% MeCl

o 46% MeCl

o 97% TCE

1. Burbank, Anaheim, Oakland and default met for chronic effects; Fresno, Concord, Mather, and default met for acute effects.

2. Composite is based on average of 10 met sets. Default meteorology is considered independently.

In order to estimate the total health impacts (or some desired subset) at a generic facility,

the individual contributions must be added. For example, let’s assume that we are looking at

generic facility G-01 located in the Burbank, California area where a 94% Perc brake product is

being used. Let’s assume further that this facility also uses products from the other three product

categories and that we are interested in estimating potential health impacts at 20 meters from the

center of the facility. Using Appendix D, we would look up the corresponding health impact

values. Table F-5 summarizes the calculation method and provides give the results.
F-6

Table F-5. Facility G-01 Health Impacts at Burbank at 20 Meters 

Using a 94% Perc Aerosol Brake Cleaning Product

and other Automotive Consumer Products

Product Category Potential Cancer Risk

[chances per million]

Hazard Index

Resident Worker Acute Chronic

94% Perc Brake Cleaner147.41 20.18 0.0727 0.2296

Carburetor Cleaner 0.74 0.32 0.0164 0.0017

Engine Degreaser 2.19 0.93 0.0109 0.0061

General Purpose Degreaser 1.37 0.58 0.0040 0.0017

Total Impacts: 51.71 22.01 0.1040 0.2391

1. These health values assume a 20 brake job per week throughput and 1 19-oz can per job used. Please see Appendix D for more information.

If we consider the same example but instead assume that a multicomponent brake cleaning

product containing 55% Perc and 25% MeCl is being used, Table F-6 would then summarize the

calculation method and provide the results for this scenario.

Table F-6. Facility G-01 Health Impacts at Burbank at 20 Meters 

Using a Multicomponent Aerosol Brake Cleaning Product

and other Automotive Consumer Products

Product Category Potential Cancer Risk

[chances per million]

Hazard Index

Resident Worker Acute Chronic

55% Perc, 25% MeCl Brake

Cleaner1

29.87 12.71 0.0701 0.2303

Carburetor Cleaner 0.74 0.32 0.0164 0.0017

Engine Degreaser 2.19 0.93 0.0109 0.0061

General Purpose Degreaser 1.37 0.58 0.0040 0.0017

Total Impacts: 34.17 14.54 0.1014 0.2398

1. These health values assume a 20 brake job per week throughput and 1 19-oz can per job used. Please see Appendix D for more

 information.

Using these examples as a guideline in conjunction with the data in Appendix D, the total

potential health impacts at a generic facility under a variety of conditions can be estimated.
F-7

It is expected that the usage estimates for carburetor cleaners, engine degreasers, and

general degreasers underestimate their contribution to the overall risk. This expectation is based

on the limited data available with regard to product usage rates in these categories. Due to this

limitation, usage rates were capped at three and one-third (3a)14-ounce cans per week for

carburetor cleaners, three 18-ounce cans per week for engine degreasers, and three 16-ounce cans

for general degreasers. These amounts are the average usage rates for each category found in the

Facility Survey supported by sales data in the 1997 Consumer and Commercial Products Survey. 

While it seems reasonable that these products would most likely be used at a greater rate than

indicated here, the ARB currently does not possess sufficient data to justify higher usage rates. 

As a result, potential health impacts from these three categories may be underestimated by an

unknown degree.
F-8

REFERENCES FOR APPENDIX F

ARB, 1997a. Perchloroethylene Need Assessment for Automotive Consumer Products: Status

Report, California Air Resources Board, June 1997.

MarketScope, 1996. “1996 Brake Repair Study”, prepared by MarketScope for Brake and Front

End Magazine, May 1996.

Norton, 1993. “Usage of Chemical Brake Cleaners in Automotive Repair Facilities”, 

John Norton, School of Business Administration, George Mason University, Fairfax, VA,

November 8, 1993.
Appendix G

Compounds in Products
G-1

Appendix G. Compounds in Products

The compounds listed in Table H-1 were compiled from material safety data sheets of

brake cleaners, carburetor and air intake cleaners, engine degreasers and general purpose

degreasers that are currently being used in California or were stated as being used in responses to

the Automotive Service Facility Questionnaire (Automotive Survey).

Table G-1. Compounds Currently Found In Automotive Consumer Products

COMPOUND NAME CAS No.1 VOC 2 TAC 3 Candidate

TAC 4

URF 5 AREL 6 CREL 7

Acetone 67641

Aliphatic Petroleum Distillates

(Petroleum Naphtha)

64742898 Yes

Ammonia 7664417 Yes 3.20e+03 1.00e+02

Aromatic Solvent (petroleum) 68477316 Yes

Benzene 71432 Yes Yes 2.90e-05 1.30e+03 7.10e+01

Butane 106978 Yes

Butanol 78922 Yes Yes

2-Butoxyethanol (EGBE;

Ethylene Glycol Monobutyl Ether)

111762 Yes 1.40e+04 2.00e+01

1,2 Butylene Oxide (inhibitor)

(1,2 Epoxybutane)

106887 Yes Yes 2.00e+01

Carbon Dioxide 124389

2-Chlorotoluene 95498 Yes

Cyclohexane 110827 Yes Yes

Diacetone Alcohol 123422 Yes

Diesel no. 2 68476346 Yes

Diethylene Glycol Mono-Butyl

Ether

112345 Yes

Dimethoxymethane (inhibitor) 109875 Yes

1,3-Dioxolane 646060 Yes

Dipentane 68956569 Yes

Dipropylene Glycol Methyl Ether 34590948 Yes
G-2

Table G-1. Compounds Currently Found In Automotive Consumer Products (cont.)

COMPOUND NAME CAS No.1 VOC 2 TAC 3 Candidate

TAC 4

URF 5 AREL 6 CREL 7

2-Ethanol-1,3-Hexanediol 94962 Yes

Ethoxylated Alkyl Amine Nonionic

Surfactant

9036195 Yes

Ethyl Acetate 141786 Yes

Ethyl Benzene 100414 Yes Yes 1.00e+03

Heavy Aromatic Solvent Naptha 64742945 Yes

Heptane 142825 Yes

Hexane 110543 Yes Yes 2.00e+02

Hydrocarbon Propellant A-46

(Propane/ Isobutane)

68476868 Yes

Hydrocarbon Propellant A-85 684768857 Yes

Hydrotreated Heavy Naphtha 64742489 Yes

Hydrotreated Heavy Paraffinic

Distillate (Petroleum)

64742547 Yes

Hydrotreated Light Petroleum

Distillates

64742478 Yes

Isobutane 75285 Yes

Isohexane 107835 Yes

Isopropyl Alcohol 67630 Yes Yes 3.20e+03

Kerosene (fuel oil #1) 8008206 Yes

Light Aromatic Solvent Naphtha 64742956 Yes

d-Limonene 5989275 Yes

Medium Aliphatic Solvent Naphtha 64742887 Yes

Methanol 67561 Yes Yes 2.80e+04 6.20e+02

Methyl Chloroform

(1,1,1-Trichloroethane)

71556 Yes 6.80e+04 3.20e+02

Methyl Ethyl Ketone (2-Butanone) 78933 Yes Yes 1.30e+04 1.00e+03

Methyl Isobutyl Ketone 108101 Yes Yes
G-3

Table G-1. Compounds Currently Found In Automotive Consumer Products (cont.)

COMPOUND NAME CAS No.1 VOC 2 TAC 3 Candidate

TAC 4

URF 5 AREL 6 CREL 7

4-Methyl-2-Pentanol

(Methyl Amyl Alcohol )

108112 Yes

n-Methyl Pyrrolidone 872504 Yes

Methylene Chloride 75092 Yes 1.00e-06 1.40e+04 3.00e+03

Mineral Oil 8012951 Yes

Mineral Spirits; Stoddard Solv.;

Petroleum Distillates

8052413 Yes

Monochlorotoluene 25168052 Yes

Monoethanolamine 141435 Yes

Monoisopropylbiphenols 25640782 Yes

Morpholine 110918 Yes

Naphtha (Benzin) 8030306 Yes

Naphthalene 91203 Yes Yes 1.40e+01

Nonane 111842 Yes

Nonionic Surfactant NP4/NP9

(p-Nonylphenol Polyethylene

Glycol Ether)

26027383 Yes

9-Octadecenoic Acid

(2)-Ammonium Salt

544605 Yes

Octylphenolpolyethoxylate 9004879 Yes

Oleic Acid 112801 Yes

Perchloroethylene 127184 Yes 5.90e-06 2.00e+04 3.50e+01

Petroleum Products Liquified Gas

Sweetened

68476868 Yes

Primary Alcohol Ethoxylate 68131395 Yes

Propane 74986 Yes

Propane/ Isobutane/ n-Butane 68476857 Yes

2-Propanol Titanate 546689 Yes

Propylene Glycol 5131668 Yes
G-4

Table G-1. Compounds Currently Found In Automotive Consumer Products (cont.)

COMPOUND NAME CAS No.1 VOC 2 TAC 3 Candidate

TAC 4

URF 5 AREL 6 CREL 7

Propylene Glycol Monomethyl

Ether (Glycol Ether)

107982 Yes 2.00e+03

Propylene Glycol T-Butyl Ether 57018527 Yes

Sodium Benzoate 532321

Sodium Metasilicate 10213793

Tergitol np-40

(Nonylphenoxypoly(ethylene

oxy)ethanol)

9016459 Yes

tert-Butyl Alcohol (inhibitor) 75650 Yes Yes

Tetrapotassium Pyrophosphate 7320345

Toluene 108883 Yes Yes 3.70e+04 4.00e+02

Trichloroethylene 79016 Yes Yes 2.00e-06 6.40e+02

1,2,4 Trimethylbezene 95636 Yes Yes

Trimethylbenzene 25551137 Yes

Water 7732185

Xylene 1330207 Yes Yes 2.20e+04 3.00e+02

 1. Chemical Abstract Service (CAS) number.

 2. Volatile Organic Compound as defined in the Glossary (Appendix I).

 3. Substances identified as Toxic Air Contaminants by the Air Resources Board, pursuant to the provisions of AB 1807 and AB 2728, including hazardous

 air pollutants listed in the Federal Clean Air Act Amendments of 1990 (ARB, 1996).

 4. Substances which are being evaluated for review as a Toxic Air Contaminant (ARB, 1996).

 5. AB 2588 Hot Spots Unit Risk and Cancer Potency Values (OEHHA, 1999b).

 6. Acute Reference Exposure Levels (RELs) (OEHHA, 1999a).

 7. Noncancer Reference Exposure Levels (Chronic) (CAPCOA, 1993).
G-5

REFERENCES FOR APPENDIX G

ARB, 1996. “Toxic Air Contaminant Identification List.” California Air Resources Board. 

June 1996.

OEHHA, 1999a. Part I The Determination of Acute Reference Exposure Levels for Airborne

Toxicants, Office of Environmental Health Hazard Assessment (OEHHA), March 1999.

OEHHA, 1999b. Part II Technical Support Document for Describing Available Cancer Potency

Factors, Office of Environmental Health Hazard Assessment (OEHHA), April 1999.

CAPCOA, 1993. CAPCOA Air Toxics “Hot Spots” Program Revised 1992 Risk Assessment

Guidelines, Toxics Committee of the California Air Pollution Control Officers Association

(CAPCOA), October 1993.

U.S. EPA, 1996. Integrated Risk Information System (IRIS), United States

Environmental Protection Agency (U.S. EPA), Washington , D.C., 1996.
Appendix H

Examples of Manufacturer Efficacy Claims

for Non-Chlorinated Products

Note: mention of trade names or commercial products does not constitute endorsement or

recommendation for use.





















Appendix I

Glossary
I-1

Appendix I. Glossary

Acute Exposure: One or a series of short-term exposures generally lasting less than 

24 hours.

Air Dispersion A mathematical model or computer simulation used to estimate the

Model: concentration of toxic air pollutants at specific locations as a result of 

mixing in the atmosphere.

Airborne Toxic Section 39655 of the Health and Safety Code, defines an“Airborne Toxic 

Control Measure: Control Measure” means either of the following:

1) Recommended methods, and, where appropriate, a range of methods,

that reduce, avoid, or eliminate the emissions of a toxic air contaminant. 

Airborne toxic control measures include, but are not limited to, emission

limitations, control technologies, the use of operational and maintenance

conditions, closed system engineering, design equipment, or work practice

standards, and the reduction, avoidance, or elimination of emissions

through process changes, substitution of materials, or other modifications.

2) Emission standards adopted by the U.S. Environmental Protection

Agency pursuant to Section 112 of the federal act (42 U.S.C. Sec. 7412).

AMR Activities: means any service, repair, restoration, or modification activity to a motor

vehicle in which cleaning or degreasing products could be used including,

but not limited to, brake work, engine work, machining operations, and

general degreasing of engines, motor vehicles, parts, or tools.

AMR Facilities: means any entity or entities that repairs, rebuilds, reconditions, services, or

maintains in any way, motor vehicles. “Facility” includes entities required

to be registered by the California Department of Consumer Affairs, Bureau

of Automotive Repair, and entities that service or repair a fleet of ten or

more motor vehicles. “Facility” does not include private residences or

entities that are involved only in motor vehicle body work or painting. 

Cancer Risk: The theoretical probability of contracting cancer when exposed for a

lifetime to a given concentration of a substance usually calculated as an

upper confidence limit. The maximum estimated risk may be presented as

the number of chances in a million of contracting cancer.

Chlorinated means an automotive consumer product (brake cleaner, carburetor cleaner, 

Automotive engine degreaser, or general purpose degreaser) that contains

Consumer Product: perchloroethylene (Perc), methylene chloride (MeCl), or trichloroethylene

(TCE).
I-2

Chronic Exposure: Long-term exposure usually lasting from one year to a lifetime.

Hazardous Air Means a substance that the U.S. Environmental Protection Agency has 

Pollutant or HAP: listed in, or pursuant to, Section 112 subsection (b) of the federal Clean

Air Act Amendments of 1990 (42 U.S. Code, Section 7412(b)).

Hazard Index: The ratio of the concentration of a toxic pollutant with non-cancer health

effects and the reference exposure level for that pollutant.

Health Risk A comprehensive analysis of the dispersion of hazardous substances in the

Assessment (HRA): environment, the potential for human exposure, and a quantitative 

assessment of both individual and population-wide health impacts

associated with the level of exposure.

Inhalation An estimate, derived by the U.S. EPA (with an uncertainty spanning

Reference perhaps an order of magnitude) of a daily exposure to the human

Concentration (RfC): population, (including sensitive subgroups) that is likely to be without

appreciable risk of deleterious effects during a lifetime of exposure. The

RfC is derived from a no or lowest observed adverse effect level from

human or animal exposures, to which uncertainty or “safety” factors are

applied.

MEIR: Maximum exposed individual resident. The residential receptor location

that receives the estimated maximum exposure from a facility’s emissions

relative to other residential locations.

MEIW: Maximum exposed individual worker. The off-site industrial or

commercial location that receives the estimated maximum exposure from

a facility’s emissions relative to other industrial or commercial locations. 

This receptor is a subset of non-residential receptors. 

Near Source The location closest to a facility where concentrations could be estimated

Location: through air dispersion modeling. 

Non-cancer Risk: Refers to non-cancer health effects due to acute and/or chronic exposure. 

This may be illustrated as an estimate of the hazard index or total hazard

index (by endpoint) resulting from exposure to toxic air pollutants.

Non-Residential A receptor that is not residentially located. This category could include 

Location: receptors at off-site industrial locations, at on-site locations of public

access for acute exposure, or employees at sensitive receptor locations,

including but not limited to, schools, hospitals, and care facilities. 
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Reference Exposure These are used as indicators of potential non-cancer adverse health effects. 

Level (REL): An REL is a concentration level at or below which no adverse health 

effects are anticipated. RELs are designed to protect most sensitive 

individuals in the population by including safety factors in their 

development.

Risk: The possibility of injury or disease, which may result from exposure to

toxic air pollutants.

Scientific Review A nine-member panel appointed to advise the Air Resources Board

Panel on Toxic Air and the Department of Pesticide Regulation in their evaluation of the

Contaminants (SRP): adverse health effects toxicity of substances being evaluated as Toxic Air

Contaminants.

Toxic Air Section 39655 of the Health and Safety Code, defines a TAC as an air

Contaminant (TAC) pollutant which may cause or contribute to an increase in mortality or an

increase in serious illness, or which may pose a present or potential hazard

to human health. A substance that is listed as a hazardous air pollutant

pursuant to subsection (b) of Section 112 of the federal act (42 U.S.C.

Sec. 7412(b)) is a TAC. TACs that are pesticides are regulated in their

pesticidal use by the Department of Pesticide Regulation.

Total Hazard Index: The sum of hazard indices for pollutants with non-cancer health effects

that have the same or similar adverse health effects (endpoints).

Unit Risk Factor: The estimated upper-confidence limit (usually 95%) probability of a

(URF): person contracting cancer as a result of a constant exposure to 1μg/m3 of a

substance over a 70-year lifetime.

Volatile Organic Means any compound containing at least one atom of carbon, excluding 

Compound (VOC): carbon monoxide, carbon dioxide, carbonic acid, metallic carbides or

carbonates, and ammonium carbonate, and excluding the following:

(1) methane, methylene chloride (dichloromethane), 1,1,1-trichloroethane

(methyl chloroform), trichlorofluoromethane (CFC-11),

dichlorodifluoromethane (CFC-12), 1,1,2-trichloro-1,2,2-trifluoroethane

(CFC-113), 1,2-dichloro-1,1,2,2-tetrafluoroethane (CFC-114),

chloropentafluoroethane (CFC-115), chlorodifluoromethane (HCFC-22),

1,1,1-trifluoro-2,2-dichloroethane (HCFC-123),

1,1-dichloro-1-fluoroethane (HCFC-141b), 1-chloro-1,1-difluoroethane

(HCFC-142b), 2-chloro-1,1,1,2-tetrafluoroethane (HCFC-124),

trifluoromethane (HFC-23), 1,1,2,2-tetrafluoroethane (HFC-134),

1,1,1,2-tetrafluoroethane (HFC-134a), pentafluoroethane (HFC-125),

1,1,1-trifluoroethane (HFC-143a), 1,1-difluoroethane (HFC-152a), cyclic,
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branched, or linear completely methylated siloxanes, the following classes

of perfluorocarbons: (A) cyclic, branched, or linear, completely fluorinated

alkanes; (B) cyclic, branched, or linear, completely fluorinated ethers with

no unsaturations; (C) cyclic, branched, or linear, completely fluorinated

tertiary amines with no unsaturations; and (D) sulfur-containing

perfluorocarbons with no unsaturations and with the sulfur bonds to

carbon and fluorine, and (2) the following low-reactive organic

compounds which have been exempted by the U.S. EPA: acetone, ethane,

methyl acetate, parachlorobenzotrifluoride

(1-chloro-4-trifluoromethyl benzene), perchloroethylene

(tetrachloroethylene).
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Acronyms

AB Assembly Bill

ARB Air Resources Board

AMR Activities Automotive Maintenance and Repair Activities

AMR Facilities Automotive Maintenance and Repair Facilities

APCD Air Pollution Control District

AQMD Air Quality Management District

ATCM Airborne Toxic Control Measure

BAR California Department of Consumer Affairs, Bureau of Automotive Repair

Cal/OSHA California Occupational Safety and Health Act

DHS California Departent of Health Services

Districts Local Air Pollution Control and Air Quality Management Districts

DOF California Department of Finance

DTSC California Department of Toxics Substances Control

HAP Hazardous Air Pollutant

HSC Health and Safety Code

IARC International Agency for Research on Cancer

OEHHA Office of Environmental Health Hazard Assessment 

MeCl Methylene Chloride (dichloromethane)

MEIR Maximum Exposed Individual Resident

MEIW Maximum Exposed Individual Worker

MSDS Material Safety Data Sheet

Perc Perchloroethylene (tetrachloroethylene)

PMI Point of Maximum Impact

RfC Reference Concentration

RfD Reference Dose

REL Reference Exposure Level

SB Senate Bill

SRP Scientific Review Panel on Toxic Air Contaminants

TAC Toxic Air Contaminant

TCA 1,1,1-Trichloroethane

TCE Trichloroethylene

URF Unit Risk Factor

U.S. EPA United States Environmental Protection Agency

VOC Volatile Organic Compound