Santa Barbara County Air Pollution Control District

STAFF REPORT – September 20, 2010

REVISIONS TO 

RULE 321. SOLVENT CLEANING MACHINES AND SOLVENT CLEANING

BACKGROUND 

The Santa Barbara County Air Pollution Control 

District (District) proposes modifications to Rule 321 

to implement requirements for solvent cleaning 

machines and solvent cleaning. To fulfill 

commitments in clean air plans, the District needs to 

revise several rules that govern solvent use (Rules 

321, 323, 330, 337, 349, 351, 353, and 354). This is 

the first of several rulemaking efforts to fulfill the 

solvent control measure commitments and it is 

focused on revising Rule 321.a

 

a

The 2001 and 2004 Clean Air Plans indicate a new 

Rule 362 would be adopted to implement the new 

“general” solvent cleaning control measure. The 

District later decided to integrate these solvent cleaning 

requirements within existing Rule 321 and each of the 

appropriate operation-specific rules. Thus, the emission 

reductions shown in the 2001 and 2004 Plans for Rule 

362 will be obtained by revising the existing rules and 

the existing control measures.

Rule 321, first adopted on February 24, 1975, applied 

to all organic solvent degreasing operations that 

involved the cleaning of surfaces before fabrication, 

surface coating, electroplating, or any other process. 

Rule revisions adopted on July 10, 1990 implemented 

Control Measure R-S-1 of the 1989 Air Quality 

Attainment Plan. The 1990 changes expanded the 

equipment design and operating requirements. 

The District made the last significant modifications to 

Rule 321 in 1997. Those changes addressed rule 

deficiencies identified by ARB and U.S.EPA. They 

also incorporated the model rule provisions 

recommended in the Air Resources Board 

Determination of Reasonably Available Control 

Technology and Best Available Retrofit Control 

Technology for Organic Solvent Cleaning and 

Degreasing Operations. [Ref. 1]

The U.S.EPA approved Rule 321 for inclusion into 

the State Implementation Plan on April 2, 1999. [Ref. 

2]

PROPOSED REVISIONS

The proposed revised Rule 321 contains solvent 

reactive organic compound (ROC) content limits, 

revised equipment requirements for degreasers, and 

sanctioned solvent cleaning devices and methods. 

These proposed provisions apply to two general 

categories: 1) solvent cleaning machines 

(degreasers), and 2) solvent cleaning done outside of 

solvent cleaning machines (e.g., wipe cleaning). 

The District modeled the revised Rule 321 

requirements on those adopted by the South Coast 

Air Quality Management District (SC) and the San 

Joaquin Unified Valley Air Pollution Control District

(SJV). Staff also included Rule 321 exemptions and 

other provisions similar to those listed in the Ventura 

County Air Pollution Control District (VC) solvent 

rules.

This rulemaking effort also includes modifications to 

Rule 102 (Definitions) and Rule 202 (Exemptions to 

Rule 201) to provide rule clarity and for consistency 

with the revised Rule 321 provisions.

For existing solvent cleaning machines and existing 

solvent cleaning operations, the deadline to comply 

with the ROC content limits (and other equipment 

requirements) is one year from the date of adoption 

of the amended Rule 321. 

The proposed revised Rule 321 requirements 

demonstrate that the District's Clean Air Plan to 

attain the California ambient ozone air quality 

standard provides for expeditious implementation of 

“every feasible measure” to reduce ozone precursor 

emissions (including ROC).

The District expects the proposed revisions to Rule 

321 to result in about 0.5 ton per day of ROC 

emission reduction in Santa Barbara County. The 

cost-effectiveness of the rule revision is estimated to 

be between -$3,310 (cost saving) and $12,940 per ton 

of ROC reduced.
STAFF REPORT - Rule 321 Page 2

September 20, 2010

Santa Barbara County APCD

Sources that May be Affected by the 

Changes to Rule 102, Rule 202, and Rule 321

The Rule 321 provisions apply to sources performing 

solvent cleaning during the production, repair,

maintenance, or servicing of parts, products, tools, 

machinery, equipment, or in general work areas at 

stationary sources. 

There is a wide range of sources that will be affected 

by the revised rule. Many of the solvent cleaning 

machines and sources performing solvent cleaning 

are exempt from the requirement to have a Permit to 

Operate. Due to their permit-exempt status, the 

District is unable to specifically identify all sources 

using solvent cleaning machines and/or performing 

solvent cleaning. 

Stationary sources that likely have solvent cleaning 

machines and/or are performing solvent cleaning that 

will be subject to the proposed revised Rule 321 are 

shown:

1. generically in Appendix A, and 

2. by facility or company/agency name in Appendix 

B – data gleaned from the District permitting and 

innovative technology programs. 

Staff estimates that there may be over 1,000 solvent 

cleaning machines in use at repair shops and 

manufacturing and production facilities in Santa 

Barbara County. Further, the number of sources 

performing solvent cleaning that will be subject to 

Rule 321 is estimated to be in the range of 100 to 

200. 

Solvent cleaning associated with other District 

operation-specific rules (e.g., 320, 325, 326, 330, 

337, 343, 344, 349, 351, 353, or 354) will be exempt 

from the Rule 321 solvent cleaning provisions.

Rule 102, Definitions

The District proposes to add and modify several 

definitions that are used in various parts of the 

rulebook. Appendix C contains an annotated 

proposed amended Rule 102 with information on the 

origin of the new and revised definitions.

Rule 202, Exemptions to Rule 201

The District proposes to make minor revisions to 

Sections D, I, and U of Rule 202 (and the Rule 210 

title throughout the rule). The reasons for such 

changes are outlined in the annotated proposed 

amended Rule 202 (Appendix D).

Rule 321, Solvent Cleaning Machines 

and Solvent Cleaning

Changes to Rule 321 will require more rigorous 

emission control techniques for solvent 

cleaning machines and establish solvent ROC 

content limits for solvent cleaning and cold 

solvent cleaners. Also, vapor cleaning 

machines using a solvent with an ROC content 

greater than 50 grams per liter shall require 

additional emission reducing devices.

Appendix E summarizes the significant 

revisions to Rule 321and Appendix F provides 

an annotated proposed amended Rule 321.

Appendix O provides the proposed amended 

rules without strikeout and underlined changes.

EMISSION REDUCTION / COST-EFFECTIVENESS

ROC Emission Reductions

Appendix G, Table 1, provides a breakdown of the 

projected emissions reductions for year 2011. 

Table 1 indicates that the total emission reduction

from modifying Rule 321 is about 192 tons of 

ROC per year. Table 2 provides a comparison of

the data developed for the 2007 Clean Air Plan 

and the currently projected emission reductions for

calendar years 2015 and 2020. 

Due to changes in the project, activity factors, and 

the inventory, the currently projected emission 

reductions for calendar year 2015 are about 390

pounds of reactive organic compounds per day 

less than those indicated in the 2007 Clean Air 

Plan. Despite the ROC emission reduction

shortfall, the currently projected emission 

reduction for calendar year 2015 is about 192

tons per year, which represents a very large 

and important emission reduction for Santa 

Barbara County.

At the request of the regulated community, the 

District included emissions breakdowns for 

various categories (Appendix G, Tables 3 and 

4). Although the contribution of emissions 

from point sources is relatively small, Rule 
STAFF REPORT - Rule 321 Page 3

September 20, 2010

Santa Barbara County APCD

321 needs to apply to point sources per the “adopt

every feasible measure” requirement.

Cost-Effectiveness

The cost-effectiveness of switching from highROC surface cleaning to low-ROC surface 

cleaning are shown in Appendix G, Tables 5 - 7.

The cost- effectiveness data ranges from -$3,310 

(savings) to $12,940 per ton of ROC reduced.

According to the SC cost-effectiveness analysis 

for the 1997 Rule 1122 amendments, the overall 

cost-effectiveness was $1,379 per ton of ROC 

reduced for solvent cleaning machine 

modifications. That analyses included the costs of 

vapor degreaser freeboard extension kits ($2,000 

per unit), automated parts handling systems 

($4,000 per unit), and retrofitting extended 

freeboards and freeboard chillers ($7,100 per unit).

[Ref. 3]

The cost-effectiveness for solvent cleaning 

(changing from high ROC solvents to 

compliant solvents) ranges between -$990 

(cost savings) to $2,167 per ton of ROC 

reduced. [Ref. 4]

Incremental Cost-Effectiveness

Health and Safety Code Section 40920.6 

requires an incremental cost-effectiveness 

analysis for a regulation that identifies more 

than one control option to meet the same 

emission reduction objectives. Incremental 

cost-effectiveness is defined as the difference 

in costs divided by the difference in emission 

reductions between one level of control and 

the next more stringent level of control. 

Rule 321 regulates solvent cleaning 

machines and solvent cleaning. Compliance 

by equipment modifications and the 

substitution of materials is expected. No 

alternative emission control scenario is 

available. 

ANALYSIS OF EXISTING FEDERAL AND DISTRICT REGULATIONS

Appendix H contains the written analysis required by the California Health & Safety Code Section 40727.2 

requirements. 

COMMENTS AND PUBLIC MEETINGS 

Comments

The District received and responded to an extensive 

amount of comments on the proposed revised rules 

during the development stages. Staff consolidated 

these comments and responses into Appendix I, 

Clarification of Rule Issues. Comments received 

during the formal public comment period preceding 

the Board adoption hearing on the proposed rule 

changes and staff‟s response to these comments will 

be presented to the District Board of Directors as part 

of the rule adoption process.

Public Meetings

CLEAN SLATE WORKSHOP, MAY 21, 2003

Industry representatives were concerned about 

requiring low-ROC solvents for surface preparation 

prior to vehicle painting. They indicated that past 

attempts to use compliant solvents to remove road tar 

from vehicles were not successful. 

One industry representative requested that the rule 

provide an exemption for isopropyl alcohol (IPA). 

Further, if IPA use is subject to the rule, hospitals, 

schools, technical universities, and prisons (that have 

auto body shops) should be subject to the rules. 

A concern about making the provision apply to ozone 

depleting and global warming compounds was 

expressed.

An oil industry representative mentioned that there 

needs to be an exemption for cleaning analytical 

equipment or a provision to allow the use of hexane.

Additional discussions involved rule applicability, 

exemptions, enforcement, and recordkeeping 

requirements.
STAFF REPORT - Rule 321 Page 4

September 20, 2010

Santa Barbara County APCD

SCOPING WORKSHOP, AUGUST 5, 2008

Attendees voiced concerns about hospital use of 

isopropyl alcohol for general surface cleaning and 

how these emissions would not be subject to the 

proposed amended rule. It was agreed that the rule 

support document should mention the emission rate 

from such use. Further, a specific hospital exemption 

should be added. 

Turbine cleaning activities and the applicability of 

the gas/liquid-path cleaner provisions in the existing 

rule were discussed. The District requested that a 

description of the turbine cleaning operation be 

provided.

Platform operators indicated there are concerns that 

the use of low-ROC solvents will present a water 

quality discharge compliance issue. Their current 

practice is to clean up crude oil spills by using 

petroleum-based solvents. The run-off of waste 

solvent is collected and directed into the petroleum 

product stream. Under the proposed requirements, 

the wastewater from use of aqueous solvents would 

need to collected and treated differently. District

staff indicated that additional research on this issue 

will be performed.

There were some discussions on the general approach 

being taken to regulating solvent use: 

1. Some representatives were concerned about the 

command and control approach taken by other air 

districts and the move to outlaw and criminalize 

certain chemicals, especially when the sources 

using the materials are subject to District permits. 

2. Another concern raised by the regulated 

community was that some solvent cleaning 

permits have conditions limiting solvent use in 

pounds of emissions per day; the reduction in the 

ROC per gallon limit won‟t affect the permit 

conditions. Also, the permitted emissions have 

been offset; the source has paid for the right to 

emit at a certain level, and should not be required 

to lower the ROC emissions by the revised rule 

provisions.

On issue 1, staff explained that we were proposing to 

meet the Clean Air Plan requirement to implement 

every feasible control measures. One indicator of a 

rule meeting the every feasible measure requirement 

is if the technique has been successfully adopted and 

implemented in other air districts. The proposed 

revised requirements have been adopted in the South 

Coast Air Quality Management District and the San 

Joaquin Valley Unified Air Pollution Control District 

for quite some time. The ROC limits we will be 

proposing will take into account the needs for 

specific industries. Further, many of the devices to 

be controlled by the revised rule are permit exempt. 

Regarding issue 2, there was discussion on the 

differences between prohibitory rule provisions and 

the New Source Review rule provisions. 

The regulated community wants the 55 gallons per 

year wipe cleaning permitting threshold in Rule 

202.U.3 to be increased to acknowledge or address 

the requirement to use lower ROC solvents. A 

source should not be limited to the 55 gallons per 

year provision, which was intended for high-ROC 

solvents. The District indicated that it did not 

envision issuing more permits based on the Rule 321 

changes. Further, staff would look at ways to address 

the incongruity of requiring permits for currently 

unpermitted solvent wipe cleaning operations that 

would exceed 55 gallons per year as a result of using 

Rule 321-compliant low-ROC solvents, but have 

decreased emissions as compared to high-ROC 

content solvents.

The need for Rule 321 exemptions was also 

discussed. Some participants urged the District to 

provide an exemption for wipe cleaning with 

isopropyl alcohol. Others recommended that the San 

Joaquin Valley Unified Air Pollution Control District

55 gallons per year exemption be included. 

Clarification of the proposed ROC solvent limit for 

aerospace was requested. There is a concern on what 

the ROC limit will be for solvents used in cleaning 

clean rooms. Staff indicated that they would look 

into how other air districts have handled such specific 

cleaning operations.

RULE DEVELOPMENT WORKSHOP, JUNE 25, 

2009

Comments received during this workshop included: 

1. Concerns on the emission inventory, calculations 

for the emission reductions, and emissions from 

janitorial services and hospital use of IPA. 

2. The relative low emissions and emission 

reductions projected from stationary sources in 

comparison to those from area sources.

3. Concerns on how the District will enforce the 

requirements on unpermitted (area) sources.
STAFF REPORT - Rule 321 Page 5

September 20, 2010

Santa Barbara County APCD

4. Desires to get clarification on certain aspects of 

the rule; suggestions on clarifying text and 

additions to the rules and/or the background 

paper.

5. How certain exemptions would not be useful 

without revisions.

6. Requests that the District not make the Rule 321 

requirements applicable to solvents that contain 

toxic air contaminants (i.e., under the proposed

amended rules, solvents otherwise exempt due to 

having a low ROC content would be subject to the 

rule if they contained TACs above two percent).

Staff indicated that they would continue to work with 

the regulated community on the issues and respond to 

their requests for information. Appendix M contains 

a list of toxic air contaminants.

COMMUNITY ADVISORY COUNCIL MEETING, 

SEPTEMBER 23, 2009

The District asked the Community Advisory Council 

(CAC) to provide recommendations on two Rule 321 

rulemaking key issues:

1. Should the project include toxic air 

contaminants (TACs)?

2. Should the “general solvent use” limit be 25 or 

50 grams of ROC per liter?

The CAC passed motions recommending that the 

project not include TACs and that the limit be at 50 

grams per liter.

COMMUNITY ADVISORY COUNCIL MEETING, 

JULY 14, 2010

The CAC passed a motion to recommend that the 

Board approve the proposed amended rules with two 

changes: move the definition of “solvent” that 

includes the “toxic air contaminant” caveat from Rule 

102 into Rule 321 and put the old Rule 321 “solvent” 

definition in Rule 102. The CAC felt there could be 

unintended consequences if the “solvent” definition 

in Rule 102 included a TAC facet because Rule 102 

definitions apply throughout the rulebook.

PUBLIC HEARING ON THE ADOPTION OF THE 

PROPOSED AMENDED RULES, SEPTEMBER 20, 

2010

The Board is scheduled to consider the adoption of 

the revised rules at the September 20, 2010 Public 

Hearing.

COMPARISON OF ADJOINING AIR POLLUTION CONTROL DISTRICT RULES

Appendix J provides a comparison of the San Joaquin Valley Air Pollution Control District (APCD), Ventura 

County APCD, and the San Luis Obispo County APCD rules on permit exemptions and requirements for solvent 

cleaning machines and solvent cleaning. Basically, there are general similarities with some minor differences 

between the adjoining air district rules and the proposed amended rules. 

IMPACTS OF THE REVISED RULES TO INDUSTRY AND THE DISTRICT

Details of the impacts from the rule revisions are summarized in Appendix K. The rule revisions will cause impacts 

to the regulated community and District staff by:

1. Requiring a permit for a source that uses certain compounds in excess of one gallon per year.

2. Expanding the scope of applicability of Rule 321 to include solvents that contain toxic air contaminants.

3. Requiring the application and verification of control techniques to comply with the Rule 321 requirements. 

4. Increasing existing or creating new operating and monitoring costs.

5. Reducing solvent costs for some sources due to the use of lower-ROC content solvents.

To assist sources in determining attributes of various solvents, the District has included a Solvent Information Table 

in Appendix N.
STAFF REPORT - Rule 321 Page 6

September 20, 2010

Santa Barbara County APCD

REFERENCES 

1. Air Resources Board, Determination of 

Reasonably Available Control Technology and 

Best Available Retrofit Control Technology for 

Organic Solvent Cleaning and Degreasing 

Operations, July 18, 1991.

2. Federal Regulation citation: 63 FR 5922, April 

2, 1999.

3. South Coast Air Quality Management District, 

Final Staff Report for Proposed Amendment to 

Rule 1122 - Solvent Degreasers, June 6, 1997.

4. San Joaquin Valley Unified Air Pollution 

Control District, Final Staff Report: Organic 

Solvent Cleaning Project, Appendix A, 

December 20, 2001. 

APPENDICES

Appendix A: Generic Types of Stationary Sources that May Have Solvent Cleaning Machines or May be 

Performing Solvent Cleaning that Will be Subject to the Amended Rule 321

Appendix B: Facilities that May Have Solvent Cleaning Machines or May be Performing Solvent Cleaning 

Subject to Proposed Amended Rule 321

Appendix C: Annotated Proposed Amended Rule 102, Definitions

Appendix D: Annotated Proposed Amended Rule 202, Exemptions to Rule 201

Appendix E: Summary of Significant Changes to Rule 321, Solvent Cleaning Machines and Solvent Cleaning

Appendix F: Annotated Proposed Amended Rule 321, Solvent Cleaning Machines and Solvent Cleaning

Appendix G: Summarized Data on Emission Reductions, Emissions, and Cost-Effectiveness

Appendix H: Identification of Existing Federal and the Santa Barbara County Air Pollution Control District

Regulations that Apply to the Same Equipment or Source Type Covered in Rule 321

Appendix I: Clarification of Rule Issues

Appendix J: Comparison of the Adjoining Air District Permitting and Prohibitory Rules for Solvent Cleaning 

Machines and Solvent Cleaning

Appendix K: Impacts from the Revised Rules

Appendix L: Flowchart Overviews of Proposed Amended Rules 202 and Rule 321

Appendix M: List of Toxic Air Contaminants

Appendix N: Solvent Information Table

Appendix O: Proposed Amended Rules Without Strikeout and Underlined Formatting
STAFF REPORT - Rule 321 Page A-1

September 20, 2010

Santa Barbara County APCD

Appendix A

Santa Barbara County 

Generic Types of Stationary Sources that May Have Solvent Cleaning Machines 

or May be Performing Solvent Cleaning that Will be Subject to the Amended Rule 321

Aircraft and Aerospace Vehicle Parts and Products Manufacturing Facilities

Airports

Agricultural Mills

Asphaltic Concrete Batch Plants

Automobile Repair Shops

Bulk Fuel Plants

Concrete Batch Plants

Correctional Facilities, Prisons, and Jails

Electronic Device Manufacturers 

Gas Stations with Maintenance Bays

Landfills

Lawnmower Repair Shops

Machine Shops

Manufacturing Plants

Medical Device Manufacturers

Military Installations

Mineral Processing Plants

Pharmaceutical Manufacturers

Repair Shops

Satellite Parts, Products, and Payload Manufacturing/Handling Facilities 

Silicone Manufacturing Plants

Spaceports

Tire Shops

Wastewater Treatment Plants

Water Filter Manufacturing Facilities

Water Treatment Plants

Wineries & Breweries

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STAFF REPORT - Rule 321 Page B-1

September 20, 2010

Santa Barbara County APCD

Appendix B

Santa Barbara County

Facilities that May Have Solvent Cleaning Machines or 

May be Performing Solvent Cleaning Subject to Proposed Amended Rule 321a

Table 1. FACILITIES LISTED IN THE AIR POLLUTION CONTROL DISTRICT

INTEGRATED DATA SYSTEM

FID COMPANY OR AGENCY Sol.

Clnb SCMb

FID COMPANY OR AGENCY Sol.

Clnb SCMb

2463 Advanced Vision Science X X 9664 First Nano, Inc. X

10084 Allergan Corporation X X 8676 Foristar Methane Group, LLC X

1152 Bardex Corporation X 10453 GRT, Inc. X

3794 BEGA/US X 4487 Helix Medical, Inc., Medical 

Device Mfg

X

10291 Calient Networks, Inc X 9745 Indigo Systems X X

12 Celite X 10789 Inlustra Technologies, LLC X

1294 Channel Industries, Inc. X 10867 Innovative Micro Technology, 

Inc. (IMT)

X

4545 Cree, Inc. X 1634 International Transducer Co. X X

3778 Den-Mat Corp. X 4583 Karl Storz Imaging, Incorporated X

3858 Digital Instruments X 1670 Kilovac Corporation X X

8709 Dupont Displays X 9424 Lockheed Martin (Santa Barbara 

Focalplane - operator)

X

10307 Dupont Displays (600 Ward Dr) X 4455 Magretech, Incorporated X

1074 E & B Natural Resources X 4635 Medtronic PS Medical X

1477 Electro Optical Industries X 1820 Microwave Applications Group X

1480 Essex Electronics, Inc. X X 6100 National Aeronautics & Space 

Admin.

X X

 

a Appendix B information is based on 2007 data from several District programs and is not intended to be an allinclusive listing of facilities to be subject to the revised Rule 321. The mailing list for this rulemaking project 

includes over 800 potential sources that may be subject to the proposed amended Rule 321.

b

Sol. Cln = Solvent Cleaning and SCM = Solvent Cleaning Machine.
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September 20, 2010

Santa Barbara County APCD

FID COMPANY OR AGENCY Sol.

Clnb SCMb

FID COMPANY OR AGENCY Sol.

Clnb SCMb

1880 Neal Feay Company X 4644 Sonatech, Inc. X

2361 Nusil Technology X 10436 Space Exploration Technologies X

4617 Pacific Hydraulic Systems X X 8698 Spaceport Systems International X

8934 Pacific Scientific, EKD X X 2758 Special Technologies Laboratory X

3890 Raytheon, Bldg B-8 X X 10341 Superconductor Technologies, 

Inc.

X

4140 Raytheon, Bldgs B1, B2, B3, and 

B6

X X 1900 The Okonite Company X

1971 Raytheon, Hollister X X 3640 Trisep Corporation X

8742 Raytheon, Lompoc X 3970 United Launch Alliance, LLC X

9684 Raytheon, VOCs X 206 United Launch Alliance, LLC X

4574 Renco Encoders, Incorporated X X 00201 

(+ 

Others)

Vandenberg Air Force Base, 

Solvents (general)

X

4621 Silicone Technology X 10105 Veeco Instruments X

3750 Skate One Corp. X

Table 2. AUTOMOBILE REPAIR FACILITIES

A & A Import Service Airport Motors Anderson Custom Boats Auto Pro

A & B Glass Al Williams Carburetor & 

Electric Co.

Andy's Mobil Lube & Auto 

Service

Automotive Concepts

A 1 Smog & Repair Alamar Automotive Anvil Motor Sports Automotive Service Center

AAMCO Transmission Alisal Guest Ranch and 

Resort (Alisal Ranch Golf 

Course)

APW Automotive Services Automotive Systems 

Laboratory, Inc.

Advanced Automotive Alisal Guest Ranch and 

Resort (Alisal River Golf 

Course)

A-Smog-It Automotive Tech Group, Inc.

Advanced Automotive 

Services

Allan Hancock Community 

College

ATG Automotive 

Technicians Group

AutoProfessionals

AGS Rebuilders Anacapa Mobile Service Auto Parts Restoration Ayers Repairs
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September 20, 2010

Santa Barbara County APCD

Bear Automotive Casey's Garage Dimauro's Honda Service 

Center

Granny's Garage

Ben's Transmission Service Cetti Services- Goleta

Discount Tire Centers

Guadalupe Union School 

District

Bianchi Motor & Auto Body Channel City Auto Body Dos Pueblos High School H&R Motors

Big Brand Tire Co., Carrillo 

St.

Channel City Engineering East-West Motors Haik's German Autohaus

Big Brand Tire Co., Fairview 

Ave.

City of Santa Barbara Motor 

Pool

Eric Krebs Automotive Hein Motor Repair

Big O Tires Clark Motors Fairview Shell Auto Care Higgins Muffler & Brake

Blanquette Automotive Coast Muffler & Brake Fairview Unocal Service & 

Carwash

Hughes Automobile 

Company

Bob Joehnck Automotive Coast Village Shell Falcon Crest Tire & Service Ian's

Bob Woolever's Tire Shoppe, 

Hollister Ave.

Coastline Auto Repair Fast Lane Oil Change, 

Milpas St.

Import Auto Parts Machine 

Shop & Parts Store

Bob's Auto Salon Cooper Automotive Fast Lane Oil Change, State 

St.

Imported Auto Service

Bob's Garage Cory Motors Fast Undercar, Inc. Independent Lexus & Infiniti

Bob's Import Auto Service Cutter Motors Firestone Tire & Service 

Centers

Iversen Motor Co.

Bowman's Auto Repair Cycle Werks Fred Import Auto Service J & S East Valley Garage

Bruce's Auto Repair D & D Truck Service Garcia's Auto Repair J V Enterprises

Buellton Union Elementary 

School District

D & G Automotive George Thorpe JAE

Burley's Bimmer Service Dal PozzoTire Corp., 

Chapala St.

GM Auto & Smog Jenson Chevron Service

Bush's Automotive Repair Dal PozzoTire Corp., Milpas 

St.

Goleta Chevron Service Jiffy Lube, Hollister Ave.

Byrd Harvest Dal PozzoTire Corp., Pine 

Ave.

Goleta Radiator Service Jiffy Lube. De La Vina St.

C & S Automotive Dave Scholl automotive Goleta Transmission

Jim Vreeland Ford

Carburetor & Electric Co. Dave's Auto Repair Goleta Union School District John Howe West, Inc.

Carpinteria Automotive De Nunzio Racing Products Goodyear Tire Center John Hurley Automotive

Carpinteria Union School 

District

Der Volks Werks Graham ChevroletOldsmobile-CadillacJohn's Mobil
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Santa Barbara County APCD

Jose Antonio Huerta Mireles Automotive Precision Automotive Santa Barbara Honda

Ken Symer Automotive Mission Uniform Service Quality Automotive Repair Santa Barbara Mobile Auto

Kennedy's Automotive 

Center

Mitchell International Raffetto & Co. Santa Barbara MTD

Klaus Braun Automotive Motor Brake & Wheel Svc Razon Transmission Santa Barbara Nissan, LLC

Lang Motors Muller & Goss Reliable Repair Santa Barbara Radiator

Lara Auto Repair Muñoz's Auto Repair Richard's Accurate Import 

Serv.

Santa Barbara School District

Larry's Auto Parts National Motors Mobile 

Repair

Rick's Auto Repair Santa Barbara Smog Shop

Las Positas Mobil Service Nespor's University Auto 

House

Rio Vista Chevrolet Santa Barbara Transmission 

Service

Loesche's Custom VW 

Service

O'Brien Maintenance & 

Repair

Risdon's 76 Service Santa Barbara Transportation

Lompoc Union School 

District

Olive Mill 76 Service Center Rizzoli's Automotive Santa Barbara 

Transportation, Hollister 

Ave.

Love's Towing Olivera's Repair Rob's 4 Wheel Drive & Fab Santa Barbara 

Transportation, Jason Way

Mac Tools Orcutt Union School District Rob's Union 76 Santa Barbara Volkswagen

Mahneke Motors Oswald's Auto Repair Rosebro Garage Santa Maria Area Transit

Mariah Motorsports-Design 

Energy, Inc.

P. C. Automotive S D Autoparts Santa Maria Joint School 

District

Martyn Motors Pep Boys San Marcos High School Santa Maria School District

McCormix Corporation Performance Rebuilders Santa Barbara Auto 

Refinishing

Santa Ynez Valley School 

District

MD Auto Repair Perry Lincoln Mercury 

Mazda

Santa Barbara Automotive SB American Fuel & Service

Mel Clayton Ford Perry's Auto Parts & Service Santa Barbara Chrysler 

Plymouth Jeep Eagle

Schneider Autohaus, Santa 

Barbara

Mesa Union 76 Pichard's Auto Repair Santa Barbara City College Schneider Autohaus, Lompoc

Michael Fitzpatrick Auto 

Body

Pickle Auto Repair Santa Barbara County, 

Vehicle Operations Division

Scott's Mobile Automotive 

Repair

Mike Loredo Chevron Powell Garage Santa Barbara County, 

Vehicle Operations Division 

- North County

Smitty's Towing

Milano Motors Precision Auto Body and 

Paint

Santa Barbara Electronic

Service

Smog-It
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Santa Barbara County APCD

Snap On Tools, Cadiz Ct. Technomotive Tor's Saab United States Dept. of 

Agriculture, Forest Service, 

Los Padres National Forest

Specialty Tool & Bolt The Auto Works of Santa 

Barbara

Toyota of Lompoc

Valley Automotive Services

Star-Tech Auto Repair The Engine Company Toyota of Santa Barbara Village Automotive Repair

Stirling Mobile Repair The International Autohaus Toyota of Santa Maria Voigt's Truck & Auto 

Service

Stuttgart Motors The Jag Shop Trans-King Transmisisons Westside Auto Repair

Superior Brake & Alignment, 

Fairview Ave.

The Shop T's Air Conditionaing & 

Repair 

Winning Makes

Superior Brake & Alignment, 

Figueroa St.

The Smog Center Turnpike Unocal

Swedemaster TM Auto Repairs Under The Hood Automotive

Tam's Imported Car Repair Toby's Engine Parts Union 76

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STAFF REPORT - Rule 321 Page C-1

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 102 102 - 1 January 15, 2009[date of amended rule adoption]

Appendix C

Santa Barbara County 

Annotated Proposed Amended Rule 102, Definitions

RULE 102. DEFINITIONS. (Adopted 10/18/1971, revised 1/12/1976, readopted 10/23/1978, revised 

7/11/1989, 7/10/1990, 7/30/1991, 7/18/1996, 4/17/1997, 1/21/1999, 5/20/1999, 6/19/2003, 

1/20/2005, 6/19/2008, and 1/15/2009), and [date of revised rule adoption])

These definitions apply to the entire rulebook. Definitions specific to a given rule are defined in that rule or in the 

first rule of the relevant regulation. Except as otherwise specifically provided in these Rules where the context 

otherwise indicates, words used in these Rules are used in exactly the same sense as the same words are used in 

Division 26 of the Health and Safety Code. [Link to Note No. 1]

a

[. . .]

“Application Equipment” means a device or equipment used to apply solvent, sealant, adhesive, coating, ink, 

or polyester resin materials. [Link to Note No. 2]

[. . .]

“Coating” means a material applied onto or impregnated into a substrate for protective, decorative, or 

functional purposes. Such materials include, but are not limited to, paints, varnishes, sealers, and stains. 

[. . .]

“Cured Adhesive, Cured Coating, or Cured Ink” means an adhesive, coating, or ink that is dry to the touch. 

[. . .]

“Degreaser” has the same meaning as “Solvent Cleaning Machine.” [Link to Note No. 3]

[. . .]

“Flexographic Printing” means any printing method in which the image area is raised relative to the nonimage area and utilizes flexible rubber or other elastomeric plate and rapid drying liquid inks. [Link to Note 

No. 4]

[. . .]

“Janitorial Cleaning” means the cleaning of building or facility components including, but not limited to, 

floors, ceilings, walls, windows, doors, stairs, bathrooms, furnishings, and exterior surfaces of office 

equipment; excluding the cleaning of work areas associated with:

1. research and development, manufacturing, and repair activities; and 

2. laboratory tests and analyses (including quality assurance and quality control activities) and bench 

scale projects.

[. . .]

 

a Notes concerning the proposed new Rule 102 definitions are within a table starting on Page C-6. When using a 

computer to view this material, use a link to get to a note by clicking the left mouse button over the “Link to Note 

No.” text.
STAFF REPORT - Rule 321 Page C-2

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 102 102 - 2 January 15, 2009[date of amended rule adoption]

“Organic Solvents” means organic materials, including diluents and thinners which are liquid at standard 

conditions and which are used as, dissolvers, viscosity reducers or cleaning agents, except that such materials 

which exhibit a boiling point, as measured using ASTM D 1078-05, “Standard Test Method for Distillation 

Range of Volatile Organic Liquids,” ASTM International, higher than 220F at 0.5 millimeter mercury 

absolute pressure or having an equivalent vapor pressure shall not be considered to be organic solvents unless 

exposed to temperatures exceeding 220F.

[. . .]

“Photochemically Reactive Solvent” means any organic solvent with an aggregate of more than 20 percent of 

its total volume composed of the chemical compounds classified below or which exceeds any of the following 

individual percentage composition limitations, referred to the total volume of organic solvent;

1. combination of hydrocarbons, alcohols, aldehydes, esters, ethers or ketones, having an olefinic or 

cyclolefinic type of unsaturation: 5 percent, or

2. combination of aromatic compounds with 8 or more carbon atoms to the molecule, except 

ethylbenzene: 8 percent, or

3. combination of ethylbenzene, ketones having branched hydrocarbon structures, trichloroethylene 

or toluene: 20 percent.

Whenever any organic solvent or any constituent of an organic solvent may be classified from its 

chemical structure into more than one of the above groups of organic compounds, it shall be considered 

as a member of the most reactive chemical group, i.e., that group having the least allowable percent of 

the total volume of organic solvents. [Link to Note No. 5]

[. . .]

“Reactive Organic Compound” means any volatile compound containing at least one (1) atom of carbon, 

except for the following exempt compounds: [Note: Compounds and text shown below in bold are additions 

to the “reactive organic compound” definition.]

1. acetone

2. ammonium carbonate

3. carbon dioxide

4. carbon monoxide

5. carbonic acid

6. dimethyl carbonate

7. ethane

8. metallic carbides or carbonates

9. methane

10. methyl acetate

11. methyl chloroform (1,1,1-trichloroethane)

12. methyl formate; HCOOCH3

13. cyclic, branched, or linear completely methylated siloxane compounds

14. methylene chloride

15. parachlorobenzotrifluoride

16. perchloroethylene (tetrachloroethylene)

17. the following four classes of perfluorocarbon (PFC) compounds: 

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 sulfur bonds only to 

carbon and fluorine.
STAFF REPORT - Rule 321 Page C-3

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 102 102 - 3 January 15, 2009[date of amended rule adoption]

18. propylene carbonate

19. tertiary-butyl acetate; C6H12O2 (“acetic acid, 1,1-dimethylethyl ester”)

Tertiary-butyl acetate (also known as t-butyl acetate or tBAc) shall be considered exempt as 

a reactive organic compound only for purposes of reactive organic compound emissions 

limitations or reactive organic compound content requirements and will continue to be a 

reactive organic compound for purposes of all recordkeeping, emissions reporting, 

photochemical dispersion modeling, and inventory requirements which apply to reactive 

organic compounds.

20. CFC-11 (trichlorofluoromethane)

21. CFC-12 (dichlorodifluoromethane)

22. CFC-113 (1,1,2-trichloro-1,2,2-trifluoroethane)

23. CFC-114 (1,2-dichloro 1,1,2,2-tetrafluoroethane)

24. CFC-115 (chloropentafluoroethane)

25. HCFC-22 (chlorodifluoromethane)

26. HCFC-31 (chlorofluoromethane)

27. HCFC-123 (1,1,1-trifluoro 2,2-dichloroethane)

28. HCFC-123a (1,2-dichloro-1,1,2-trifluoroethane)

29. HCFC-124 (2-chloro-1,1,1,2-tetrafluoroethane)

30. HCFC-141b (1,1-dichloro 1-fluoroethane)

31. HCFC-142b (1-chloro-1,1 difluoroethane)

32. HCFC-151a (1-chloro-1-fluoroethane)

33. HCFC-225ca (3,3-dichloro-1,1,1,2,2-pentafluoropropane)

34. HCFC-225cb (1,3-dichloro-1,1,2,2,3-pentafluoropropane)

35. HFC-23 (trifluoromethane)

36. HFC-32 (difluoromethane)

37. HFC-43-10mee (1,1,1,2,3,4,4,5,5,5-decafluoropentane)

38. HFC-125 (pentafluoroethane)

39. HFC-134 (1,1,2,2-tetrafluoroethane)

40. HFC-134a (1,1,1,2-tetrafluoroethane)

41. HFC-143a (1,1,1-trifluoroethane)

42. HFC-152a (1,1-difluoroethane)

43. HFC-161 (ethylfluoride)

44. HFC-236ea (1,1,1,2,3,3-hexafluoropropane)

45. HFC-236fa (1,1,1,3,3,3-hexafluoropropane)

46. HFC-245ca (1,1,2,2,3-pentafluoropropane)

47. HFC-245ea (1,1,2,3,3-pentafluoropropane)

48. HFC-245eb (1,1,1,2,3-pentafluoropropane)

49. HFC-245fa (1,1,1,3,3-pentafluoropropane)

50. HFC-365mfc (1,1,1,3,3-pentafluorobutane)

51. HFE-7100; (CF3)2CFCF2OCH3; (2-(difluoromethoxymethyl)-1,1,1,2,3,3,3-

heptafluoropropane) or C4F9OCH3; (1,1,1,2,2,3,3,4,4-nonafluoro-4-methoxy-butane)

52. HFE-7200; (CF3)2CFCF2OC2H5; (2-(ethoxydifluoromethyl)-1,1,1,2,3,3,3-heptafluoropropane)

or C4F9OC2H5; (1-ethoxy-1,1,2,2,3,3,4,4,4-nonafluorobutane)

Rule 202.D.10.l.1 requires an Authority to Construct and Permit to Operate when using more than one 

gallon per year per stationary source of any one of the following exempt compounds: dimethyl 

carbonate, methyl formate, HCFC-225ca, HCFC-225cb, HFC-43-10mee, HFC-245fa, HFC-365mfc, or 

HFE-7100 [(CF3)2CFCF2OCH3 or C4F9OC2H5]. Rule 202.D.10.l.2 requires an Authority to Construct 

and Permit to Operate when using more than one gallon per year per stationary source of tertiary-
STAFF REPORT - Rule 321 Page C-4

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 102 102 - 4 January 15, 2009[date of amended rule adoption]

butyl acetate. The one gallon per year per stationary source limit is a per compound limit for each 

compound in aggregate for the entire stationary source and includes any amounts of the compound 

used in mixed or diluted product.

[Link to Note No. 6]

1. Acetone, ethane, methane, methyl acetate, and inorganic carbon compounds: carbon monoxide, 

carbon dioxide, carbonic acid, metallic carbides or carbonates, and ammonium carbonate

2. Chlorinated compounds 

1,1,1-trichloroethane (methyl chloroform)

methylene chloride (dichloromethane)

perchloroethylene (tetrachloroethylene)

3. Chlorofluorocarbons

trichlorofluoromethane (CFC-11)

dichlorodifluoromethane (CFC-12)

chlorodifluoromethane (HCFC-22)

trifluoromethane (HFC-23)

1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113)

1,2-dichloro-1,1,2,2-tetrafluoroethane (CFC-114)

chloropentafluoroethane (CFC-115)

4. Hydrofluorocarbons

pentafluoroethane (HFC-125)

1,1,2,2-tetrafluoroethane (HFC-134)

1,1,1,2-tetrafluoroethane (HFC-134a)

1,1,1-trifluoroethane (HFC-143a)

1,1-difluoroethane (HFC-152a)

5. Hydrochlorofluorocarbons

2,2-dichloro-1,1,1-trifluoroethane (HCFC-123)

2-chloro-1,1,1,2-tetrafluoroethane (HCFC-124)

1,1-dichloro-1-fluoroethane (HCFC-141b)

1-chloro-1,1-difluoroethane (HCFC-142b)

6. Parachlorobenzotrifluoride (PCBTF)

7. Cyclic, branched or linear completely methylated siloxanes (VMS)

8. Perfluorocarbon compounds which fall into these classes:

a. Cyclic, branched, or linear, completely fluorinated alkanes;

b. Cyclic, branched, or linear, completely fluorinated ethers with no unsaturation;

c. Cyclic, branched, or linear, completely fluorinated tertiary amines with no unsaturations; 

and

d. Sulfur containing perfluorocarbons with no unsaturations and with sulfur bonds only to 

carbon and fluorine.

[. . .]
STAFF REPORT - Rule 321 Page C-5

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 102 102 - 5 January 15, 2009[date of amended rule adoption]

“Rotogravure Printing” means any printing process where the image area is etched or engraved relative to 

the surface of the image cylinder. Ink is transferred from minute etched wells on a plate cylinder to a 

substrate, which is supported by an impression roller, with excess ink removed by a doctor blade. The 

substrate is fed through the printing press in continuous rolls. [Link to Note No. 7]

[. . .]

“Solvent" means “Organic Solvent.” [Link to Note No 8]

“Solvent Cleaning” means any activity, operation, or process (including, but not limited to, surface 

preparation, cleanup, or wipe cleaning) performed outside of a solvent cleaning machine, that uses solvent to 

remove uncured adhesives, uncured coatings, uncured inks, uncured polyester resin material, uncured sealant,

or other contaminants, including, but not limited to, dirt, soil, oil, lubricants, coolants, moisture, fingerprints, 

and grease, from parts, products, tools, machinery, application equipment, and general work areas. Cleaning 

spray equipment used for the application of coating, adhesive, ink, polyester resin material, or sealant is also 

considered to be solvent cleaning irrespective of the spray material being cured. [Link to Note No. 9]

“Solvent Cleaning Machine” means any device or piece of equipment that uses solvent liquid or vapor to 

remove soils, moisture, or other contaminants from the surfaces of materials. Types of solvent cleaning 

machines include, but are not limited to, batch cold, batch vapor, in-line cold, in-line vapor, remote reservoir, 

and gas-path solvent cleaners, as defined in Rule 321. Buckets, pails, and beakers with capacities of 3.785 

liters (1.00 gallon) or less are not considered solvent cleaning machines. However, the use of such a 

container or similar containers (e.g., hand-held spray bottles) with a liquid solvent for cleaning is considered 

to be solvent cleaning. Any device or piece of equipment used exclusively for stripping shall not be 

considered to be a solvent cleaning machine. [Link to Note No. 10]

[. . .]

“Stripping” means the use of solvent to remove materials such as cured adhesives, cured inks, cured sealants,

cured or dried paints, cured or dried paint residues, or temporary protective coatings. 

“Surface Preparation” means the removal of contaminants such as dust, soil, oil, grease, moisture, etc., prior 

to application of an adhesive, coating, ink, polyester resin material, or sealant. [Link to Note No. 11]

[. . .]

“Toxic Air Contaminant” means “Toxic air contaminant” as defined in Health and Safety Code Section 

39655. [Link to Note No. 12]

[. . .]

“Wipe Cleaning” means a solvent cleaning activity performed by hand rubbing an absorbent material such as 

a rag, paper, sponge, brush, or cotton swab containing solvent. [Link to Note No. 13]

[. . .]
STAFF REPORT - Rule 321 Page C-6

September 20, 2010

Table of Annotations for 

Santa Barbara County APCD Rule 102 [Annotated draft of September 20, 2010]

NOTE 

No.

DEFINITION NOTE LINK TO 

RETURN TO 

PAR 102a

1 The proposed new terms in Rule 102 appear in 

Rule 202 (Exemptions) and/or the proposed 

amended Rule (PAR) 321. In general, the 

District modeled the new definitions on those 

found in other California air districts or in 

federal law (40CFR, Part 63, Subpart T). 

Click here.

2 Application Equipment This term is in the proposed amended Rule 321 

and it is found in several current rules. The 

definition is the same one used in the South 

Coast AQMD (SC) Rule 1171, except staff 

added “sealant” and “solvent” to be more 

general.

Click here.

3 Degreaser Although the term “degreaser” is being 

eliminated in the PAR 321 (with one 

exception), inclusion of a “degreaser” definition 

in Rule 102 is intended to inform and clarify 

that a “degreaser” is a “solvent cleaning 

machine.” (The PAR 321 definition of batch 

cleaning machine is the only place in the rule 

that the term “degreaser” appears.) 

Click here.

4 Flexographic Printing This definition should be in Rule 102 for rule 

clarity because the Rule 202.S.1 exemption 

uses this term.

Click here.

5 Organic Solvents and Photochemically 

Reactive Solvent

The District added the word “organic” for rule 

clarity. 

Click here.

6 Reactive Organic Compound The District is revising the reactive organic 

compound (ROC) definition by incorporating 

all of the 40 CFR, Part 51, Section 51.100(s) 

exempt compounds. The PAR 102 ROC 

definition includes a note on there being a 

permitting threshold in Rule 202.D.10.1.1 and 2

on some of the compounds. 

Click here.

7 Rotogravure Printing This definition is the same one found in Rule 

354. The Rule 202.S.1 exemption refers to this 

type of process. Thus, for rule clarity, the 

District is adding the definition to Rule 102.

Click here.

8 Solvent The solvent definition is needed in Rule 102 

because the term is used in several newly 

proposed Rule 102 definitions, the Rule 202.U 

exemption, and many of the coating rules. 

Click here.

 

a When using a computer to view this material, you may return to the PAR 102 text by clicking the “here” link in the 

table using the left mouse button.
STAFF REPORT - Rule 321 Page C-7

September 20, 2010

Table of Annotations for 

Santa Barbara County APCD Rule 102 [Annotated draft of September 20, 2010]

NOTE 

No.

DEFINITION NOTE LINK TO 

RETURN TO 

PAR 102a

9 Solvent Cleaning A solvent cleaning definition is needed because 

the term is used in permit exemptions in the 

proposed amended Rule 202. The District

modeled the solvent cleaning definition on the 

organic solvent cleaning definition used by the 

San Joaquin Valley Unified Air Pollution 

Control District (SJV) in their Rule 4663, 

Organic Solvent Cleaning, Storage, and 

Disposal.

Click here.

10 Solvent Cleaning Machine This definition is modeled on the definition in 

40 CFR §46.461. The District is making the 

cutoff to be 1 gallon capacity instead of the two 

gallons capacity in 40 CFR §46.461 because

existing Rule 321.B.2.a has a one gallon cutoff. 

Also, the Ventura County APCD (VC) Rule 

74.6.B.2.b has a one gallon cutoff whereas a 

solvent cleaning machine must be used if the 

solvent container is greater than one gallon. 

The solvent cleaning machine definition is 

needed in Rule 102 because the term is used in 

the proposed amended Rule 102 “degreaser”

and “solvent cleaning” definitions and in 

proposed amended Rule 202 exemptions.

Click here.

11 Surface Preparation This term and definition are modeled on 

provisions from SC Rule 1171. The term will 

be used in the ROC limit tables in the rules 

being modified to add new solvent cleaning 

provisions. Staff added the term “moisture” in 

the list of contaminants because the 40 CFR 

§64.460 et seq. requirements for halogenated 

solvent cleaning also include drying provisions.

Click here.

12 Toxic Air Contaminant The District adding this definition at the request 

of the regulated community. Appendix M 

provides a list of the compounds that are 

currently classified as a TAC. Click here to go 

to Appendix M.

Click here.

13 Wipe Cleaning This definition is the same one found in the SJV 

Rule 4663.

Click here.

Click here to return to the list of Appendices in the Staff Report.
THIS PAGE INTENTIONALLY LEFT BLANK
STAFF REPORT - Rule 321 Page D-1

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 202 202 - 1 June 19, 2008[date of revised rule adoption]

Appendix D

Santa Barbara County

Annotated Proposed Amended Rule 202, Exemptions to Rule 201 

RULE 202. EXEMPTIONS TO RULE 201. (Adopted 10/18/1971, revised 5/1/1972 and 6/27/1977, 

readopted 10/23/1978, revised 12/7/1987, 1/11/1988, 1/17/1989, 7/10/1990, 7/30/1991, 

11/05/1991, 3/10/1992, 5/10/1994, 6/28/1994, 4/17/1997, 3/17/2005, 1/17/2008, and 6/19/2008, 

and [date of revised rule adoption])

[. . .]

D. General Provisions [. . .]

5. Temporary Equipment

[. . .] The owner or operator shall pay any applicable fee pursuant to Rule 210, Fees. 

[Link to Note No. 1]

a

[. . .]

7. Stationary Source Permit Exemption

[. . .] The owner or operator shall pay any applicable fee pursuant to Rule 210, Fees.

[. . .]

10. Notwithstanding any exemption defined in this Rulerule, no new or modified stationary source 

that has the potential to emit air contaminants in excess of the amounts specified shall be exempt 

from permit requirements:

[. . .]

 k. 40 tons per year municipal waste combustor acid gases. 

 l. In addition, notwithstanding any exemption defined in this rule, no stationary source that 

has the potential to emit any air contaminants in excess of the amounts specified shall be 

exempt from permit requirements:

l. more than one gallon per year of any one of the exempt compounds listed 

below. The one gallon per year per stationary source limit is a per compound 

limit for each compound in aggregate for the entire stationary source and 

includes any amounts of the compound used in mixed or diluted product.

a) dimethyl carbonate; or

b) methyl formate; HCOOCH3; or

c) HCFC-225ca (3,3-dichloro-1,1,1,2,2-pentafluoropropane); or

d) HCFC-225cb (1,3-dichloro-1,1,2,2,3-pentafluoropropane); or

e) HFC-43-10mee (1,1,1,2,3,4,4,5,5,5-decafluoropentane); or

f) HFC-245fa (1,1,1,3,3-pentafluoropropane); or

g) HFC-365mfc (1,1,1,3,3-pentafluorobutane); or

h) HFE-7100; (CF3)2CFCF2OCH3; (2-(difluoromethoxymethyl)-

1,1,1,2,3,3,3-heptafluoropropane); or 

 

a Notes concerning the proposed amended Rule 202 are within a table starting on Page D-5. When using a computer 

to view this material, use a link to get to a note by clicking the left-mouse button.
STAFF REPORT - Rule 321 Page D-2

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 202 202 - 2 June 19, 2008[date of revised rule adoption]

i) HFE-7100; C4F9OCH3; (1,1,1,2,2,3,3,4,4-nonafluoro-4-methoxybutane); or

2. more than one gallon per year of tertiary-butyl acetate; C6H12O2 (“acetic acid, 

1,1-dimethylethyl ester”). Tertiary-butyl acetate (also known as t-butyl acetate 

or tBAc) shall be considered exempt as a reactive organic compound only for 

purposes of reactive organic compound emissions limitations or reactive organic 

compound content requirements and will continue to be a reactive organic 

compound for purposes of all recordkeeping, emissions reporting, 

photochemical dispersion modeling, and inventory requirements which apply to 

reactive organic compounds. The one gallon per year per stationary source limit 

for tertiary-butyl acetate is an aggregate limit for the entire stationary source and 

includes any amounts of the compound used in mixed or diluted product.

[Link to Note No. 2]

[. . .]

E. Compliance with Rule Changes

[. . .]

If no application is filed within the ninety (90) day period, the application filing fee prescribed in Rule 210, 

Fees, shall be doubled and the equipment owner shall be subject to a Notice of Violation and to the penalty 

provisions set forth in California Health and Safety Code Sections 42400 et seq.

[. . .]

F. Internal Combustion Engines 

[. . .]

5. [. . .] The owner or operator shall pay any applicable fee pursuant to Rule 210, Fees. [. . .] 

[. . .]

7. [. . .] The owner or operator shall pay any applicable fee pursuant to Rule 210, Fees. [. . .] 

8. [. . .] The owner or operator shall pay any applicable fee pursuant to Rule 210, Fees. [. . .]

[. . .]

I. Coatings Applications Equipment and Operations 

The following listed coating applications equipment and operations is are exempt from permit 

requirements. [. . .]

3. Equipment used in surface coating operations provided that the total amount of coatings and 

solvents used does not exceed 55 gallons per year. [. . .] Solvents meeting the criteria of Section 

U.2.b or Section U.2.c or that have a reactive organic compound content of 50 grams per liter or 

less, as determined by the Environmental Protection Agency Reference Method 24, do not 

contribute to the 55 gallons per year per stationary source limitation. [. . .] [Link to Note No. 3]

6. Unheated non-conveyorized coating dip tanks of 100 gallons or less capacity. [Link to Note No. 4]
STAFF REPORT - Rule 321 Page D-3

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 202 202 - 3 June 19, 2008[date of revised rule adoption]

[. . .]

K. Food Processing and Preparation Equipment

[. . .]

7. [. . .] The owner or operator shall pay any applicable fee pursuant to Rule 210, Fees.

[. . .]

P. Miscellaneous Equipment and Operations

[. . .]

14. [. . .] The owner or operator shall pay any applicable fee pursuant to Rule 210, Fees. [. . .]

[. . .]

U. Solvent Application Equipment and Operations

The following solvent cleaning, application equipment solvent cleaning machines and their operations is 

are exempt from permit requirements. Notwithstanding the listed exemptions, any collection of articles, 

machines, equipment or other contrivances within each listed equipment category at a stationary source that 

has aggregate emissions in excess of 10 tons per calendar year of any affected pollutant is not exempt.

1. Unheated solvent dispensing containers, unheated non-conveyorized Unheated nonconveyorized 

solvent rinsing containers or unheated non-conveyorized coating dip tanks of 1.00 gallons or less 

capacity provided that solvent cleaning performed in association with such containers complies

with the requirements in Rule 321, Solvent Cleaning Machines and Solvent Cleaning.; this 

exemption shall not apply to degreasing equipment regulated under the provisions of Rule 321. 

[Link to Note No. 5]

2. Single pieces of degreasing equipmentsolvent cleaning machines, which use unheated solvent, and 

which:

a. have a liquid surface area (i.e., the area of the drain for remote reservoir cleaning 

machines or the solvent/air interface area for other solvent cleaning machines) of less 

than 929 square centimeters (1.0 square foot), unless the aggregate liquid surface area of 

all degreasers solvent cleaning machines at a stationary source, covered by this 

exemption is greater than 0.929 square meter (10 square feet), or [Link to Note No. 6]

b. use only organic solvents with an initial boiling point of 150 degrees Celsius (302 

degrees Fahrenheit) or greater as determined by ASTM D-1078-8605, “Standard Test 

Method for Distillation Range of Volatile Organic Liquids,” ASTM International, or

c. use materials solvents with a volatile reactive organic compound content of two percent 

or less by weight as determined by EPA Environmental Protection Agency Method 24.

d. materials exempt pursuant to subsections b. and c. above do not contribute to the 0.929 

square meter (10 square feet) limitation in subsection a.The liquid surface area of any 

solvent cleaning machine using the following solvent shall not be counted towards the 

0.929 square meter (10 square feet) aggregate limit in subsection a. above:

i. any solvent that has a reactive organic compound content of 50 grams per liter 

or less, as determined by the Environmental Protection Agency Method 24, or
STAFF REPORT - Rule 321 Page D-4

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 202 202 - 4 June 19, 2008[date of revised rule adoption]

ii. any solvent exempt pursuant to subsection b. or subsection c. above.

 [Link to Note No. 7]

3. Equipment used in wipe Wipe cleaning operations, provided that the solvents used do not exceed 

55 gallons per year per stationary source and that the solvent cleaning complies with the 

requirements in Rule 321, Solvent Cleaning Machines and Solvent Cleaning. [Link to Note No. 8]

To qualify for this exemption, the owner or operator shall maintain records of the amount (gallons 

per year) of solvents used for wipe cleaning at the stationary source for each calendar year. 

These records shall be maintained on site for at least 3 years and be made available to the District 

on request. Thereafter, the records shall be maintained either on site or readily available for 

expeditious inspection and review for an additional 2 years. Solvents meeting the criteria of 2.b. 

or c. above or that have a reactive organic compound content of 50 grams per liter or less, as 

determined by the Environmental Protection Agency Reference Method 24, do not contribute to 

the 55 gallons per year per stationary source limitation. [Link to Note No. 9]

4. Notwithstanding the Section U.3 exemption above, solvent cleaning to disinfect and 

decontaminate surfaces and equipment in hospitals, clinics, medical facilities, dentistry facilities, 

and other health care facilities, including but not limited to, sanatoriums, convalescent hospitals, 

convalescent homes, skilled nursing facilities, nursing homes, blood banks, and bloodmobiles. 

[Link to Note No. 10]

5. Notwithstanding the Section U.3 exemption above, solvent cleaning associated with janitorial 

cleaning, including graffiti removal. [Link to Note No. 11]

[. . .]
STAFF REPORT - Rule 321 Page D-5

September 20, 2010

Table of Annotations for 

Santa Barbara County APCD Rule 202 [Annotated draft of September 20, 2010]

NOTE 

No.

SECTION IN 

RULE 202

PROPOSED AMENDED RULE (PAR) 202 NOTES LINK TO 

RETURN TO 

PAR 202a

1 D.5 Based on a comment from U.S.EPA, the District is adding the Rule 

210 title “Fees” in this section and all other sections where Rule 210

is referenced in Rule 202. 

Click here.

2 D.10.l The District is added provisions to allow some of the ROC 

definition's exempt compound usage rates to be up to one gallon per 

year per stationary source. Any usage rate above this threshold will 

negate any otherwise applicable permit exemptions. The ARB has 

not recommended that air districts designate these compounds as 

exempt compounds (i.e., non-ROC) due to health risk and/or CEQA 

implications. The genesis for the usage rate threshold stems from 

provisions in the SJV Rule 1020 definition of “Volatile Organic 

Compound.”

The last paragraph in the revised definition of reactive organic 

compound in PAR 102 mentions that Rule 202.D.10.l.1 and 2

provisions apply when using certain compounds in excess of the 

threshold. Use of HCFC and HFC in refrigeration, air conditioning, 

and fire protection, is excluded from the one gallon per year per 

stationary source limit.

Click here.

3 I.3 The new text is proposed to make the solvent exemption component 

of Section I.3 consistent with the proposed revised Section U.3 

provisions.

Click here.

4 I.6 This exemption is currently located in Rule 202, Section U.1. The 

District is moving the coating dip tank exemption to Section I 

because Section I is for coating applications.

Click here.

5 U.1 The District is deleting the unheated solvent dispensing containers

exemption text from this section. Rule 202 Section V, Storage and 

Transfer Equipment and Operations, Sections V.1 and/or V.4 provide 

exemptions for such solvent storage containers and transfer 

equipment. 

On the exemption for unheated nonconveyorized solvent rinsing 

containers, the District is changing the exemption applicability 

threshold from 100 gallons capacity to one gallon capacity. This 

provides consistency with the definitions of solvent cleaning and 

solvent cleaning machines and the proposed revised Rule 321 

provisions.

The “unheated non-conveyorized coating dip tank” exemption text is 

being relocated to 202.I.6 because the provision relates to coating 

applications.

Click here.

6 U.2.a Per a request from the regulated community, the District added text to 

clarify the meaning of “liquid surface area” in PAR 202.U.2.a. The 

added text is consistent with the Rule 321 definition of the 

"solvent/air interface area."

Click here.

 

a When using a computer to view this material, you may return to the PAR 102 text by clicking the “here” link in the 

table using the left mouse button.
STAFF REPORT - Rule 321 Page D-6

September 20, 2010

Table of Annotations for 

Santa Barbara County APCD Rule 202 [Annotated draft of September 20, 2010]

NOTE 

No.

SECTION IN 

RULE 202

PROPOSED AMENDED RULE (PAR) 202 NOTES LINK TO 

RETURN TO 

PAR 202a

7 U.2.d The District revised Rule 202.U.2.d for improved rule clarity and to 

include the 50 grams per liter or less surface area exclusion. The 

regulated community requested that SCMs employing solvents with 

an ROC of 50 g/l or less not be counted when determining the Rule 

202, Section U.2.a aggregate liquid surface area figure. Consistent 

with this request, the District is including such a provision in PAR 

202.U.2.d.i. PAR 202.U.d.ii carries forward an existing rule 

provision on what to exclude when performing the aggregate liquid 

surface area assessment for Rule 202.U.2.a.

Click here.

8 U.3 Rule 321 provisions apply regardless of the operation being permit 

exempt. One of the major changes to Rule 321 is that the wipe 

cleaning exemption is being removed from Rule 321. Thus, facilities 

performing wipe cleaning not otherwise exempt from Rule 321 will 

need to comply with the requirements (e.g., the Section D, good 

housekeeping practices). For rule clarity, the District is adding text, 

which makes Rule 202.U.3 applicable only for sources using 55 

gallons per year of solvent for wipe cleaning and that comply with 

Rule 321. 

Sources subject to the Rule 202.U.3 exemption will also be eligible 

for the Rule 321.B.15 exemption. This is a partial Rule 321 

exemption and will allow the use of solvents that do not comply with 

the Section M.1 solvent requirements (Table 1 ROC limits). Any 

person claiming the Rule 321.B.15 exemption will need to keep 

monthly and calendar year total records per the provisions in Rule 

321 Section R.2. 

Click here.

9 U.3 The District added the exclusionary text for solvent cleaning with 

low-ROC solvents to clarify that such operations do not require a 

permit regardless of the usage rate. The regulated community 

requested that the District provide provisions to recognize the use of 

such solvents and to avoid triggering permit requirements when there 

is an increased aqueous solvent usage rate. In general, the ratio of 

replacement aqueous solvent usage to petroleum solvent usage is 1.5 

to 1. 

Click here.

10 U.4 The District is adding this exemption for rule clarity based on 

requests from industry.

Click here.

11 U.5 Same as above. Click here.

Click here to return to the list of Appendices in the Staff Report.
STAFF REPORT - Rule 321 Page E-1

September 20, 2010

Santa Barbara County APCD Summary of Rule 321 Changes

Appendix E

Santa Barbara County 

Summary of Significant Changes to Rule 321, 

Solvent Cleaning Machines and Solvent Cleaning

Solvent ROC Content Limits

The proposed amended Rule (PAR) 321, 

Sections H.7, I.7, K.6, and M.1 will limit the 

solvent ROC content. Solvents used in the 

following devices and processes shall be 

limited to 50 grams per liter of material: 

1. Remote reservoir cold cleaning machines.

2. Batch and in-line cold cleaning machines.

3. General product cleaning and surface preparation 

for coating application.

4. General repair cleaning and maintenance 

cleaning.

PAR 321.M.1 includes solvent ROC content limits 

higher than the 50 grams per liter limit for specific

solvent cleaning categories: 

Grams/Liter Solvent Cleaning Category

 (a) Product Cleaning During Manufacturing

Processes and Surface Preparation for 

Coating Application:

900 1) Electrical Apparatus Components & 

Electronic Components

2) Medical Devices & Pharmaceuticals

3) Silicone Manufacturing

________________ ____________________________________________________________

(b) Repair Cleaning and Maintenance 

Cleaning:

900 1) Electrical Apparatus Components & 

Electronic Components

2) Medical Devices & Pharmaceuticals 

(tools, equipment, machinery, and general 

work surfaces)

3) Silicone Manufacturing

________________ ____________________________________________________________

950 (c) Cleaning of Coatings Application 

Equipment

________________ ____________________________________________________________

900 (d) Cleaning of the Following Items and 

Equipment and their Components: 1) 

Aerospace Vehicles; 2) Aerospace 

Vehicle Payloads and Satellites; 3) 

Aerospace Vehicle, Aerospace Vehicle 

Payload, and Satellite: a) Transport 

Equipment (e.g., railcars, trucks, trailers, 

forklifts, and containers), and b) Support 

Processing Equipment (e.g., clean rooms, 

tools, payload fairing fixtures, alignment 

jigs, fuel and oxidizer loading carts and 

associated transfer lines).

Other Rule 321 Revisions

321.A  APPLICABILITY. The revised rule is 

being expanded to include solvent cleaning (e.g., 

wipe cleaning, spray gun cleaning).

321.B  EXEMPTIONS. The significant exemption 

changes in PAR 321 are itemized in the following.

1. Revision of the 321.B.1 text to indicate that the 

two percent or less threshold is for a solvent‟s 

reactive organic compound and toxic air 

contaminant content. If either one is exceeded, 

then the exemption does not apply. Also, 

recordkeeping provisions are added to facilitate 

verification of exemption claims.

2. Deletion of the Section B.2 exemption (solvent 

cleaners having one gallon capacity or one 

square foot) because the revised Rule 321 

provisions will apply to these small containers. 

The use of containers that are one gallon or less 

in a degreasing operation is categorized as 

solvent cleaning (see PAR 321 definition of 

solvent cleaning machine). And remote 

reservoirs previously exempt by the one square 

foot provision need to comply with the revised 

rule requirements (e.g., use of a solvent with an 

ROC content of 50 g/l or less).

3. Deletion of the exemptions for wipe cleaning, 

spray gun cleaning, and enclosed small cold 

cleaners (current Rule 321.B.4.a, 321.B.4.d, and 

321.B.4.f). The PAR 321 includes provisions 

that are applicable to these processes and 

devices.

4. Addition of several exemptions that are similar 

to those found in the San Joaquin Valley Unified 

APCD, the South Coast AQMD, and the Ventura 

County APCD solvent rules. 

321.C  DEFINITIONS. The District proposes new 

and revised definitions to provide clarity to the rule 

provisions and to expand the rule‟s applicability to 

include solvents containing toxic air contaminants. 

Appendix F (annotated PAR 321) provides 

information on many of the new and modified 

definitions in Rule 321.
STAFF REPORT - Rule 321 Page E-2

September 20, 2010

Santa Barbara County APCD Summary of Rule 321 Changes

321.D  GENERAL OPERATING 

REQUIREMENTS. Most of the changes to these 

provisions clarify good housekeeping and 

maintenance requirements. 

321.E, J, AND L  VAPOR CLEANING MACHINE 

REQUIREMENTS. For vapor cleaning machines, 

the PAR 321 provisions require several new and 

revised requirements related to solvent pumps, 

heating controls, air blankets, safety devices, and 

other emission reduction techniques:

 The proper use of superheated vapor zones (E.9), 

 Idling and downtime mode covers (J.2 & L.3), 

 The condenser flow switch is to automatically shut 

off the sump heat if the condenser coolant stops 

circulating or becomes warmer that its designed 

operating temperature (J.4 & L.5), 

 Clarification that the vapor level control device is 

to automatically shut off the sump heat if the vapor 

level rises above the height of the primary 

condenser (J.5 & L.6),

 For units with solvent flow, clarification that a 

device (e.g., a spray pump control switch) is 

required to prevent the solvent flow pump 

operation unless the solvent vapor level is at the 

designed operating level (J.6 & L.7),

 A device that automatically turns off the sump heat 

if the sump heater coils are not submerged in the 

liquid solvent (J.7 & L.8), and

 The following provisions (effective one year after 

the rule revision):

 A freeboard ratio of 1.0 (J.8 & L.9),

 For a batch vapor cleaning machine, an 

automatic parts handling system (J.11.a),a

 Circumferential trough and water separator 

(J.11.b, J.11.c, L.11.a, & L.11.b),aand

 A freeboard refrigeration device and a 

superheated vapor zone that meet the rule 

requirements (J.11.d, J.11.e, L.11.c, & L.11.d).

a

321.M  SOLVENT CLEANING. This is an entirely 

new section. In addition to limiting the solvent ROC 

content (as discussed on page E-1):

 Section M.2 specifies appropriate cleaning devices 

and methods.

 Section M.3 requires the use of an enclosed system 

(or equivalent) when cleaning spray application 

equipment.

a

 

aApplicable when using a solvent with an ROC 

content in excess of 50 grams per liter.

321.N  EMISSION CONTROL SYSTEM 

REQUIREMENTS. The two significant changes in 

this section are the addition of Sections N.5 & N.6. 

Section N.5 establishes a deadline for performing an 

initial source test on the emission control system. 

And, Section N.6 requires that emissions from an 

emission control system not be in excess of the 

emissions otherwise expected when complying with 

the solvent ROC-limits.

321.O  ALTERNATIVE OPERATING AND 

EQUIPMENT REQUIREMENTS FOR AN 

AIRLESS OR AIR-TIGHT SOLVENT CLEANING 

MACHINE. Air-tight and airless cleaning systems 

are state-of-the-art machines that have extremely low 

emissions. Allowing use of such systems in lieu of 

meeting other rule provisions is consistent with how 

the SJV and SC rules are written.

321.R  RECORDKEEPING REQUIREMENTS. 

The revised recordkeeping provisions:

 Are being expanded to apply to all solvent cleaning 

machines and solvent cleaning (irrespective of such 

operations or equipment being subject to permits). 

 Require monthly records on the assessment of the 

amount of solvents used and their respective ROC 

content. 

 For solvent cleaning, require records on the type of 

cleaning activity, by cleaning categories listed in 

Table 1. 

 For solvent cleaning machines, require records on 

the type of solvent cleaning machine, type solvent, 

ROC content, and solvent‟s initial boiling point. 

 For an emission control system, require daily 

records on the key operating parameters.

 For Sections B.9 or B.15 exemption claims, require 

that appropriate records on the solvent usage be 

maintained.

 Eliminate the existing Section P.2 recordkeeping 

provision for the “small surface area” exemption 

(current Section B.2.b), which is proposed for 

deletion.

321.S  REPORTING. The reporting requirements 

are being expanded to include solvent cleaning 

subject to a Permit, monthly/annual solvent usage 

data, PTO #, and name and address of Permit holder. 

321.T  COMPLIANCE SCHEDULE. New solvent 

cleaning operations and new solvent cleaning 

machines are to comply with the Rule 321 

requirements the first time they are 

performed/operated in the District. 

Rule 102, Rule 202, and/or Rule 321 revisions will 

result in:
STAFF REPORT - Rule 321 Page E-3

September 20, 2010

Santa Barbara County APCD Summary of Rule 321 Changes

 Existing qualifying solvent cleaning operations 

becoming subject to Rule 321 for the first time, and 

 Some existing solvent cleaning machines becoming

subject to Rule 321 for the first time. 

In such cases, Section T provides the 

owners/operators one month to comply with the 

applicable operating requirements, six months to 

comply with the applicable recordkeeping and 

reporting requirements, and one year to comply with 

the equipment requirements and the solvent ROC 

limits. 

Table 1 summarizes provisions in the various 

proposed amended Rule 321 sections that have a oneyear compliance deadline after the adoption of the 

revised rules. Table 2 provides a quick-reference list 

of significant new and revised requirements in 

proposed amended Rule 321. Table 3 shows the 

effective dates for the new and revised Rule 321

requirements.

Table 1. REQUIREMENTS THAT HAVE A ONE-YEAR COMPLIANCE DEADLINE FROM THE DATE OF 

ADOPTION OF THE REVISED RULE 321, SOLVENT CLEANING MACHINES AND SOLVENT CLEANING

SECTION PROVISION

G, H, I, J, 

K, L, and N

General equipment requirements for solvent cleaning machines, applicable provisions of additional 

equipment requirements, and emission control system requirements. This one-year deadline for 

compliance applies to Rule 321-exempt solvent cleaning machines that lose their exemption by the 

adoption of the amended Rule 102, 202, and/or 321. 

H.7 Solvents used in remote reservoir cold cleaning machines shall have an ROC content of 50 grams per 

liter or less (unless exempt by Section B.8).

I.7 Solvents used in batch cold cleaning machines shall have an ROC content of 50 grams per liter or less 

(unless exempt by Section B.8).

J.8 The freeboard ratio for batch vapor cleaning machines shall be 1.0 or greater.

J.11 Batch vapor cleaning machines using solvents with an ROC content in excess of 50 g/l shall be 

equipped with all of the following (unless exempt by Sections B.18 or B.20):

a. An automated parts handling system;

b. A circumferential trough;

c. A water separator (not required for solvents that form azeotropes with water); 

d. A freeboard refrigeration device that is operated such that the chilled air blanket temperature, 

measured at the center of the air blanket, is no greater than 40 percent of the initial boiling point of 

the solvent, in degrees Fahrenheit, for solvents that do not form azeotropes with water, or 50 percent 

of the initial boiling point, in degrees Fahrenheit, for solvents that form azeotropes with water; and

e. A superheated vapor zone where parts remain in the vapor zone for at least the minimum dwell time, 

as specified by the manufacturer. The temperature within the superheated vapor zone shall be at 

least 10 degrees Fahrenheit above the initial boiling point of the solvent being used.

K.6 Solvents used in in-line cold cleaning machines shall have an ROC content of 50 grams per liter or less 

(unless exempt by Section B.8).

L.9 The freeboard ratio for in-line vapor cleaning machines shall be 1.0 or greater. (An alternative that 

complies with L.10 may be used.)

L.11 In-line vapor cleaning machines using solvents with an ROC content of 50 g/l or greater shall be 

equipped with all of the following:

a. An automated parts handling system;

b. A circumferential trough;

c. A water separator (not required for solvents that form azeotropes with water); 

d. A freeboard refrigeration device that is operated such that the chilled air blanket temperature, 

measured at the center of the air blanket, is no greater than 40 percent of the initial boiling point of 

the solvent, in degrees Fahrenheit, for solvents that do not form azeotropes with water, or 50 percent 

of the initial boiling point, in degrees Fahrenheit, for solvents that form azeotropes with water; and

e. A superheated vapor zone where parts remain in the vapor zone for at least the minimum dwell time, 

as specified by the manufacturer. The temperature within the superheated vapor zone shall be at 

least 10 degrees Fahrenheit above the initial boiling point of the solvent being used.
STAFF REPORT - Rule 321 Page E-4

September 20, 2010

Santa Barbara County APCD Summary of Rule 321 Changes

SECTION PROVISION

M.1 Except as provided in Section N, no person shall use a solvent to perform solvent cleaning which 

exceeds the ROC content limit specified in Table 1 (unless exempt by Sections B.8, B.9, B.10, B.15, or 

B.16).

M.2 Any person performing solvent cleaning shall use one or more of the devices or methods specified in 

M.2.

M.3 Any person performing solvent cleaning of spray application equipment shall use a cleaning material 

that has an ROC content of 50 grams/liter or less or shall use an enclosed cleaning system.

____________________________

Note: The Section N.5 requirement to perform an initial source test on an emission control system has a one-year 

deadline (or later deadline as established by an Authority to Construct). 

Table 2. QUICK-REFERENCE LIST OF SIGNIFICANT NEW AND REVISED

REQUIREMENTS IN PROPOSED AMENDED RULE 321

SECTION(S) AFFECTED EQUIPMENT OR SOLVENT 

CLEANING CATEGORIES REQUIREMENT

H.7, I.7, K.6, & 

M.1

1) Cold Solvent Cleaning Machines: 

Remote Reservoir, Batch, and In-Line 

2) Some Solvent Cleaning Categories as 

Specified in the Section M.1, Table 1

Solvent limit of 50 grams of ROC per liter

M.1 Some Solvent Cleaning Categories as 

Specified in the Section M.1, Table 1

Solvent limit of 900 or 950 grams of ROC per 

liter

J.8 & L.9 Vapor Cleaning Machines (Batch & In-Line) Freeboard Ratio of 1.0 or Greater

J.4 – J.7 &

L.5 – L.8

Vapor Cleaning Machines (Batch & In-Line) 1) Spray Pump Control Switch and

2) Automatic Sump Heat Shut Off for:

a) Condenser Flow Too Hot or Not 

Circulating,

b) Vapor Level Too High, and

c) Sump Heater Coils Not Being 

Submerged in the Liquid Solvent

J.11 & L.11 Vapor Cleaning Machines (Batch & In-Line)

that use Solvents with an ROC Content in 

Excess of 50 Grams per Liter

1) Automatic Parts Handling System,a

2) Circumferential Troughs,

3) Water Separators,

4) Freeboard Refrigeration Device, and

5) Superheated Vapor Zone 

M.2 Cleaning Devices and Methods Sanctioned cleaning methods and devices 

(e.g., wipe cleaning; hand-held spray bottles;

solvent flow, dip, or flush methods) used in 

acceptable ways

M.3 Solvent Cleaning of Spray Application 

Equipment

The cleaning material is to contain ≤ 50 grams 

of ROC/liter. Alternatively, if a solvent with a 

higher ROC content is employed, the process 

shall use an enclosed system (or an APCOapproved alternative)

 

a The requirement to install an automatic parts handling system probably does not apply to an in-line vapor cleaning 

machine as such a unit is already so equipped.
STAFF REPORT - Rule 321 Page E-5

September 20, 2010

Santa Barbara County APCD Summary of Rule 321 Changes

Table 3. EFFECTIVE DATES FOR THE NEW AND REVISED RULE 321 REQUIREMENTSa Solvent limit of 50 Grams of ROC per Liter (H.7, I.7, K.6 & M.1) Solvent limit of 900 or 950 Grams of ROC per Liter (B.2, B.8, & M.1) Solvent with > 2% (by Wt.) ROC or TAC Content are not exempt (B.1) Exemption Claims to be Supported with Records (B.1, B.9, B.15, & B.18) General Operating Requirements (D) Use of Idling & Downtime Mode Covers for Vapor Cleaning Machines (E.1, J.2, & L.3) Allow the Solvent Vapor Layer to Collapse Before Turning Off the Primary Condenser (E.3) Proper Use of Superheated Vapor Zones (E.9) Gas-Path Cleaners with a Solvent > 50 g/l, Spent Solvent is to be Collected (G.3) Rolling Motion Only (No Splashing) When Using a Pump-Agitated Bath (G.5) Use of a Downtime Mode Covers for Cold Cleaning Machines (I.1 & K.3) Vapor Cleaning Machine Control Switches & Safety Devices (J.4 – J.7 & L.5 – L.8)

b

Freeboard Ratio of 1.0 or Greater on Vapor Cleaning Mach‟s (J.8 & L.9)Minimize Passages on In-Line Cleaning Machines (K.2 & L.2)Enhanced Vapor Cleaning Machine Controls (J.11 & L.11)

c

Cleaning Devices & Methods (M.2)Solvent Cleaning of Application Equipment (M.3)

Emission Control Device Initial Test & Potential Emission Cap (N.5 & 6)Airless & Air-Tight Solvent Cleaning Machines (O)Monthly Recordkeeping & Annual Reporting (R & S)

EFFECTIVE

Upon Adoptiond X X X X X X X X X X X X X X

One Year After Adoption X X X X X X

EQUIPMENT IMPACTED

Aerosol Products Subject to 

PAR 321.B.9 X

Wipe Cleaning Subject to 

PAR 321.B.15 X

Batch Vapor Solvent 

Cleaning Machines Subject to 

PAR 321.B.18

X

Batch Cold Cleaning 

Machines X X X X X X

e X X

 

a This table is intended to summarize many of the proposed new and revised Rule 321 requirements with effective dates or compliance schedule data. If there is a conflict between 

data shown in Table 3 and the proposed amended Rule 321 or an omission, the proposed amended Rule 321 text takes precedence.

b

Includes spray pump control switch and automatic sump heat shut off for 1) condenser flow too hot or not circulating, 2) vapor level too high, and 3) sump heater coils not being 

submerged in the liquid solvent. 

c Enhanced vapor solvent cleaning controls require use of an automated parts handling system, circumferential trough, water separator, freeboard refrigeration device, and superheated 

vapor zone. These enhanced controls are required when the solvent contains in excess of 50 grams per liter. An exemption in Section B may apply to these requirements.

d Rule 321.T, Compliance Schedule, provides compliance periods for existing solvent cleaning operations and existing solvent cleaning machines that become subject to Rule 321 due 

to a Rule 102, Rule 202, and/or Rule 321 revision. In general, the owners/operators of such equipment will have one month to comply with the applicable operating requirements, six 

months to comply with the applicable recordkeeping and reporting requirements, and one year to comply with the equipment requirements and the solvent limits in Table 1. New 

solvent cleaning operations and new solvent cleaning machines are to comply with the Rule 321 requirements the first time they are performed/operated in the District.

e Required when using a high volatility solvent.
STAFF REPORT - Rule 321 Page E-6

September 20, 2010

Santa Barbara County APCD Summary of Rule 321 Changes Solvent limit of 50 Grams of ROC per Liter (H.7, I.7, K.6 & M.1) Solvent limit of 900 or 950 Grams of ROC per Liter (B.2, B.8, & M.1) Solvent with > 2% (by Wt.) ROC or TAC Content are not exempt (B.1) Exemption Claims to be Supported with Records (B.1, B.9, B.15, & B.18) General Operating Requirements (D) Use of Idling & Downtime Mode Covers for Vapor Cleaning Machines (E.1, J.2, & L.3) Allow the Solvent Vapor Layer to Collapse Before Turning Off the Primary Condenser (E.3) Proper Use of Superheated Vapor Zones (E.9) Gas-Path Cleaners with a Solvent > 50 g/l, Spent Solvent is to be Collected (G.3) Rolling Motion Only (No Splashing) When Using a Pump-Agitated Bath (G.5) Use of a Downtime Mode Covers for Cold Cleaning Machines (I.1 & K.3) Vapor Cleaning Machine Control Switches & Safety Devices (J.4 – J.7 & L.5 – L.8)

b

Freeboard Ratio of 1.0 or Greater on Vapor Cleaning Mach‟s (J.8 & L.9)Minimize Passages on In-Line Cleaning Machines (K.2 & L.2)Enhanced Vapor Cleaning Machine Controls (J.11 & L.11)

c

Cleaning Devices & Methods (M.2)Solvent Cleaning of Application Equipment (M.3)

Emission Control Device Initial Test & Potential Emission Cap (N.5 & 6)Airless & Air-Tight Solvent Cleaning Machines (O)Monthly Recordkeeping & Annual Reporting (R & S)

EFFECTIVE

Upon Adoptiond X X X X X X X X X X X X X X

One Year After Adoption X X X X X X

EQUIPMENT IMPACTED 

In-Line Cold Cleaning 

Machines X X X X X X X X X

Batch Vapor and In-Line 

Vapor Cleaning Machines X X X X X X X X X

f X X X

Remote Reservoir Cleaning 

Machines X X X X X X

Gas-Path Solvent Cleaners X X X X

Solvent Cleaning (Performed 

Outside of a Solvent 

Cleaning Machine)

X X X X X X X X

Airless Solvent Cleaners and 

Air-Tight Solvent Cleaners X X X X

Footnotes a – e appear on the previous page.

Click here to return to the list of Appendices in the Staff Report.

 

f Applicable to in-line vapor cleaning machines (not batch vapor cleaning machines).
STAFF REPORT - Rule 321 Page F-i

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - i September 18, 1997[date of amended rule adoption]

Appendix F

Santa Barbara County 

Annotated Proposed Amended Rule 321, Solvent Cleaning Machines and Solvent Cleaning

Table of Contents

Section and Title Page No.

A. Applicability...................................................................................................................................................F-1

B. Exemptions.....................................................................................................................................................F-1

C. Definitions......................................................................................................................................................F-5

D. General Operating Requirements ..................................................................................................................F-14

E. Additional Operating Requirements for Batch Vapor Cleaning Machines and 

In-Line Vapor Cleaning Machines ................................................................................................................F-16

F. Additional Operating Requirements for Gas-Path Solvent Cleaners.............................................................F-16

G. General Equipment Requirements for Solvent Cleaning Machines ..............................................................F-17

H. Additional Equipment Requirements for Remote Reservoir Cold Cleaning Machines.................................F-18

I. Additional Equipment Requirements for Batch Cold Cleaning Machines....................................................F-18

J. Additional Equipment Requirements for Batch Vapor Cleaning Machines..................................................F-19

K. Additional Equipment Requirements for In-Line Cold Cleaning Machines .................................................F-21

L. Additional Equipment Requirements for In-Line Vapor Cleaning Machines ...............................................F-21

M. Requirements – Solvent Cleaning .................................................................................................................F-22

N. Emission Control System Requirements.......................................................................................................F-24

O. Alternative Operating and Equipment Requirements for an Airless Solvent Cleaning Machine or

an Air-Tight Solvent Cleaning Machine........................................................................................................F-25

P. Test Methods.................................................................................................................................................F-25

Q. Operation and Maintenance Plan...................................................................................................................F-26

R. Recordkeeping Requirements........................................................................................................................F-26

S. Reporting Requirements................................................................................................................................F-28

T. Compliance Schedule ....................................................................................................................................F-28

Table of Annotations............................................................................................................................................F-30
STAFF REPORT - Rule 321 Page F-1

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 1 September 18, 1997[date of amended rule adoption]

RULE 321. SOLVENT CLEANING MACHINES OPERATIONS AND SOLVENT CLEANING. 

(Adopted 2/24/1975, readopted 10/23/1978, revised 6/11/1979, 7/10/1990, 4/17/1997, 

7/17/1997, and 9/18/1997, and [date of revised rule adoption]) [Link to Note No. 1]

a

A. Applicability

This Rule rule shall apply to any person who owns, operates, or uses any solvent cleaning machine or 

performs any solvent cleaning operation outside of a solvent cleaning machine operationsduring the 

production, repair, maintenance, or servicing of parts, products, tools, machinery, equipment, or in general 

work areas at any stationary source. [Link to Note No. 2]

B. Exemptions 

Except as otherwise specifically provided herein, the provisions of this rule shall not apply to the following:

1. Any Ssolvent cleaning machine equipped with and any solvent cleaning performed with 

operations using a solvent (including emulsions) that contains two percent by weight or less of 

each of the following:

a. rReactive organic compounds by weight (as determined by EPA Environmental 

Protection Agency method 24), and

b. Toxic air contaminants (as determined by generic solvent data, solvent manufacturer‟s 

composition data or by a gas chromatography test and a mass spectrometry test). shall not 

be subject to the requirements of this Rule. [Link to Note No. 3]

c. Any person claiming this exemption shall maintain the records specified in Sections

R.1.a.1) and R.1.a.2) in a manner consistent with Section R.3 and make them available 

for review.

2. Except for the Rule 321 Section G.2 requirement that the cleaner be covered when work is not 

being processed (use of covers are not required for remote reservoir cold cleaners using low 

volatility solvents), the provisions of this Rule shall not apply to an unheated solvent cleaner that:

a. has a capacity of 3.785 liters (1 gallon) or less, or

b. has an evaporative surface area of less than 929 square centimeters (1 square foot). 

However, if the aggregate evaporative surface area of all such solvent cleaners at a 

stationary source is greater than 0.929 square meters (10 square feet), none of the 

cleaners are exempt. [Link to Note No. 4]

32. The provisions of Rule 321 Section J.7 shall not apply to open-top vapor solvent cleaners with less 

than 1 square meter (10.8 square feet) of evaporative surface area. The cleaning of architectural 

coating application equipment provided that the solvent used does not exceed 950 grams of 

reactive organic compound per liter of material. [Link to Note No. 5]

4. The provisions of this Rule shall not apply to:

a. wipe cleaning, [Link to Note No. 6]

3.b. dDry cleaning operations of clothing or other fabrics covered under Rule 320, Petroleum Solvent 

Dry Cleaners, or 17 California Code of Regulations Title 17, Section 93109, Perchloroethylene 

 

a Notes concerning the proposed new and revised Rule 321 provisions are within a table starting on Page F-29. 

When using a computer to view this material, use a link to get to a note by clicking the left-mouse button over the 

“Link to Note No.” text.
STAFF REPORT - Rule 321 Page F-2

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 2 September 18, 1997[date of amended rule adoption]

Airborne Toxic Control Measure-- for Emissions of Perchloroethylene from Dry Cleaning and 

Water-Repelling Operations,. [Link to Note No. 7]

4. c. sStripping of cured coatings (e.g., stripping), cured adhesives, (e.g., debonding, 

unglueing) cured sealants, and cured inks, except the stripping of such materials from spray 

application equipment. [Link to Note No. 8]

d. spray gun cleaning operations, [Link to Note No. 9]

5. e. Notwithstanding Section B.1, any batch vapor, in-line vapor, in-line cold, and batch cold 

solvent cleaning machines that uses any halogenated hazardous air pollutant solvent containing 

methylene chloride, perchloroethylene, trichloroethylene, 1,1,1-trichloroethane, carbon 

tetrachloride, or chloroform, or any combination of these halogenated hazardous air pollutants 

solvents, in a total concentration greater than 5 percent by weight, as a cleaning and/or drying 

agent, provided such a solvent cleaning machines are is subject to 40 CFR, Part 63, Subpart T, 

National Emission Standards for Hazardous Air Pollutants: Halogenated Solvent Cleaning,

(Sections 63.460 et. seq.) or. 

f. cold solvent degreasers of 37.854 liters (10 gallons) or less in capacity, provided the 

degreasers are designed to operate in a closed system fashion (i.e., sealed when operated) 

and agitated through pump recirculation, mechanical mixing (a mixer), or with 

ultrasonics. Gas or air agitation shall not be used. [Link to Note No. 12]

6. Any equipment or operation that is subject to or specifically exempted by any of the following 

District rules.

a. Rule 325, Crude Oil Production and Separation.

b. Rule 326, Storage of Reactive Organic Compound Liquids.

c. Rule 330, Surface Coating of Metal Parts and Products.

d. Rule 337, Surface Coating of Aircraft or Aerospace Vehicle Parts and Products.

e. Rule 339, Motor Vehicle and Mobile Equipment Coating Operations.

f. Rule 343, Petroleum Storage Tank Degassing.

g. Rule 344, Petroleum Sumps, Pits and Well Cellars.

h. Rule 349, Polyester Resin Operations.

i. Rule 351, Surface Coating of Wood Products.

j. Rule 353, Adhesives and Sealants.

k. Rule 354, Graphic Arts. [Link to Note No. 13]

7. Janitorial cleaning, including graffiti removal. [Link to Note No. 14]

[Link to Note 

No. 10]

[Link to Note 

No.11]
STAFF REPORT - Rule 321 Page F-3

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 3 September 18, 1997[date of amended rule adoption]

8. Provisions of Sections H.7, I.7, K.6, and, M.1 shall not apply to the following:

a. Cleaning of solar cells, laser hardware, scientific instruments, high-precision optics, 

telescopes, microscopes, avionic equipment, and aerospace and military fluid systems; 

and

b. Cleaning in laboratory tests and analyses, including quality assurance and quality control 

applications, bench scale projects, or short-term (less than 2 years) research and 

development projects; and

c. Cleaning of cotton swabs to remove cottonseed oil before cleaning of high-precision 

optics.

d. In addition, the provisions of Sections H.7, I.7, and K.6 shall not apply to solvent 

cleaning machines employed with solvents having 900 grams of reactive organic 

compound per liter of material or less during the production, repair, maintenance, or 

servicing of electrical apparatus components, electronic components, satellites, satellite 

components, aerospace vehicles, aerospace vehicle components, aerospace vehicle 

payloads, aerospace vehicle payload components, medical devices, or silicone 

manufacturing. [Link to Note No. 16]

9. Solvent cleaning with aerosol products shall not be subject to Section D.9 and Section M.1

provisions and the Section M.2.c prohibition on solvent atomization provided: 

a. 160 fluid ounces or less of aerosol products are used per day, per facility, and

b. Records are maintained as specified in Sections R.2 and R.3, and

c. The aerosol products comply with volatile organic compound limits for consumer 

products specified in the California Code of Regulations, Title 17, Section 94507 et seq. 

[Link to Note No. 17]

10. Provisions of Section M.1, Table 1, Solvent Cleaning Activity (c) shall not apply to the cleaning 

of application equipment when such equipment is used to apply a coating on a satellite or when 

applying a radiation-effect coating. [Link to Note No. 18]

11. Section D.9 and M.2.c prohibitions on solvent atomization shall not apply to the following 

applications:

a. Cleaning of the nozzle tips of automated spray equipment systems, except for robotic 

systems.

b. Cleaning with hand-held spray bottles, squirt bottles, and other closed containers having a 

capacity of one liter or less.

c. Cleaning of gas turbines or jet engines using a gas-path solvent cleaner. [Link to Note 

No. 19]

12. De-icing of aircraft and aerospace vehicles. [Link to Note No. 20]

13. Solvent cleaning with a solvent containing 50 grams of reactive organic compounds per liter of 

material or less shall not be subject to the Section D.9 provision. [Link to Note No. 21]

14. Solvent cleaning to disinfect and decontaminate surfaces and equipment in hospitals, clinics, 

medical facilities, dental care facilities, and other health care facilities, including but not limited 

[Link to Note 

No. 15]
STAFF REPORT - Rule 321 Page F-4

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 4 September 18, 1997[date of amended rule adoption]

to, sanatoriums, convalescent hospitals, convalescent homes, skilled nursing facilities, nursing 

homes, blood banks, and bloodmobiles. [Link to Note No. 22]

15. Provisions of Section M.1 shall not apply if the net aggregate amount of solvent used for all 

solvent cleaning subject to Rule 321 (i.e., subject to Sections D, M.2, and/or M.3 provisions) at a 

stationary source does not exceed 55 gallons per year. Solvents with a reactive organic compound 

content of 50 grams per liter of material or less do not count towards the 55 gallons per year 

aggregate limit. Any person claiming this exemption shall maintain records as specified in 

Sections R.2 and R.3. [Link to Note No. 23]

16. Provisions of Section M.1 shall not apply to the following applications:

a. Cleaning of ultraviolet lamps used to cure ultraviolet inks coatings, adhesives, or resins.

b. Cleaning of mold release compounds from molds.

c. Cleaning of aerospace assembly and subassembly surfaces that are exposed to strong 

oxidizers or reducers such as nitrogen tetroxide, liquid oxygen, or hydrazine.

d. Cleaning of paper gaskets.

e. Cleaning of clutch assemblies where rubber is bonded to metal by means of an adhesive.

f. Cleaning of hydraulic actuating fluid from filters and filter housings. [Link to Note No. 

24]

g. Wipe cleaning to remove crude oil and crude oil residue from well workover, drilling 

operations, and other activities related to petroleum production and processing on 

offshore platforms, provided the solvent reactive organic compound content does not 

exceed 800 grams per liter of material and the reactive organic compound composite 

partial pressure is no more than 8 millimeters of mercury at 20 degrees Celsius. [Link to 

Note No. 25]

17. Provisions of Sections H.7, I.7, and K.6 shall not apply to the following applications, provided the 

solvent reactive organic compound content does not exceed 900 grams per liter of material and the 

reactive organic compound composite partial pressure is no more than 5 millimeters of mercury at 

20 degrees Celsius:

a. Cleaning associated with the manufacturing of nuts and bolts designed for automotive 

racing applications.

b. Cleaning of precision–lapped mechanical seals in pumps that handle liquefied gasses. 

[Link to Note No. 26]

18. Provisions of Sections J.11.a, d, and e shall not apply to batch vapor cleaning machines with a 

solvent/air interface area less than 929 square centimeters (1 square foot) or a solvent capacity less 

than 2 gallons, provided all such solvent cleaning machines emit, in aggregate, less than 55 

pounds of reactive organic compounds per month per stationary source. Any person claiming this 

exemption shall maintain records as specified in Sections R.1 and R.3. [Link to Note No. 27]

19. The use of solvent for purposes other than cleaning. [Link to Note No. 28]

20. The Section E.7 and Section J.11.a, d, and e provisions shall not apply to batch vapor cleaning 

machines provided:

a. The equipment was installed before January 1, 2007; and
STAFF REPORT - Rule 321 Page F-5

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 5 September 18, 1997[date of amended rule adoption]

b. The solvent/air interface area is less than 4.40 square feet or the solvent capacity is less 

than 2 gallons; and 

c. The equipment is used only for cleaning electronic components; and

d. The total aggregate reactive organic compound emissions from all batch vapor cleaning 

machines subject to this exemption do not exceed 188 pounds per month per stationary 

source; and

e. The equipment is subject to a Permit to Operate to help facilitate verifications that the 

requirements of subparagraphs B.20.a, b, c, and d are met.

f. In addition, the Section J.8 requirement to have a freeboard ratio of 1.0 or greater shall 

not apply to solvent cleaning machines meeting the requirements in subsections a – e 

above, provided the solvent cleaning machines have a freeboard ratio of 0.75 or greater. 

[Link to Note No. 29]

21. The Section I.3, I.4, and I.7 requirements for unheated batch cleaning machines shall not apply,

provided the equipment is used in medical device manufacturing when performing incidental 

product cleaning in conjunction with quality assurance or quality control tests (e.g., when 

conducting leak testing of silicone shells) and the solvent reactive organic compound content does 

not exceed 900 grams per liter of material. [Link to Note No. 30]

22. Metal lift-off and other semiconductor and microelectromechanical device manufacturing 

processes involving thin film deposition, vacuum deposition, and dry etching operations; including 

any maintenance activities associated with such operations. [Link to Note No. 31]

23. The solvent container draining and filling provisions in Section D.12 shall not apply to solvent 

transfers out of a sump, provided the sump has a maximum capacity of 8 gallons or less, such 

sump is easily removed from the solvent cleaning machine, and the solvent is poured from the 

sump directly into a bulk storage container. [Link to Note No. 32]

24. Any batch vapor cleaning machine meeting all of the following requirements shall be exempt from 

the Section J.8 requirement to have a freeboard ratio of 1.0:

a. The equipment is used only for cleaning electronic components; and

b. The dimensions are such that the freeboard ratio is 0.75 or greater; and

c. The solvent cleaning machine is equipped with the freeboard refrigeration device for 

which the chilled air blanket temperature (expressed in degrees Fahrenheit) at the coldest 

point on the vertical axis in the center of the air blanket shall be no greater than 30 

percent of the initial boiling point (expressed in degrees Fahrenheit) of the solvent used 

or no greater than minus 4 degrees Fahrenheit; and

d. The batch vapor cleaning machine is equipped with a superheated vapor zone where parts 

remain in the vapor zone for at least the minimum dwell time, as specified by the 

manufacturer. The temperature within the superheated vapor zone shall be at least 10 

degrees Fahrenheit above the initial boiling point of the solvent being used. [Link to Note 

No. 33]

C. Definitions [Link to Note No. 34]

See Rule 102 for definitions not limited to this rule. For purposes of this rule the following definitions 

shall apply:
STAFF REPORT - Rule 321 Page F-6

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 6 September 18, 1997[date of amended rule adoption]

“Aerosol Product” means a hand-held, non-refillable container that expels pressurized product by means 

of a propellant-induced force.

“Aerospace Vehicle” means the completed unit of any aircraft, helicopter, missile, or space vehicle. 

“Aerospace Vehicle Component” means any raw material, partial or completed fabricated part, assembly 

of parts, or completed unit of any aircraft, helicopter, missile, or space vehicle, including mockups and 

prototypes.

“Air Blanket” means the layer of air inside the solvent cleaning machine freeboard located above the 

solvent/air interface. 

“Airless Solvent Cleaning Machine” means any solvent cleaning machine that is automatically operated 

and seals at an absolute internal pressure of 0.02 pounds per square inch absolute or less, prior to the 

introduction of solvent vapor into the cleaning chamber and maintains differential pressure under vacuum 

during all cleaning and drying cycles.

“Air-Tight Solvent Cleaning Machine” means any solvent cleaning machine that is automatically 

operated and seals at a differential pressure no greater than 0.5 pounds per square inch absolute during all 

cleaning and drying operations.

"Air-Vapor Interface" means, for vapor solvent cleaners, the top of the solvent-vapor layer, and the air 

touching this layer. The effective top of the vapor layer may be determined as the maximum height where 

condensation occurs on a cold metal object lowered into the vapor zone.

"Air-Solvent Interface" means the point of contact between the exposed solvent and the air.

“ASTM” means American Society for Testing and Materials Standards.

“Automated Parts Handling System” means a mechanical device that carries all parts and parts baskets at 

a controlled speed from the initial loading of soiled or wet parts through the removal of the cleaned or dried 

parts. Automated parts handling systems include, but are not limited to, hoists and conveyors. 

“Batch-loaded” means material placed in a nonconveyorized container for cleaning.

“Batch Cleaning Machine” means a solvent cleaning machine in which individual parts or a set of parts 

move through the entire cleaning cycle before new parts are introduced into the solvent cleaning machine. 

An open-top vapor cleaning machine is a type of batch cleaning machine. A solvent cleaning machine, 

such as a Ferris wheel or a cross-rod degreaser, that clean multiple batch loads simultaneously and are 

manually or semi-continuously loaded are batch cleaning machines.

“Bench Scale Project” means a project (other than at a research and development facility) that is operated 

on a small scale, such as one capable of being located on a laboratory bench top.

“Carbon adsorber” means a bed of activated carbon into which an air-solvent gas-vapor stream is routed 

and which adsorbs the solvent on the carbon.

“Carry-out” see “Drag-out.”

“Circumferential Trough” means a receptacle located below the primary condenser that conveys 

condensed solvent and atmospheric moisture to a water separator.

“Cold Cleaner” means any cleaner using solvent that, if heated, is maintained below the initial boiling 

point temperature. Cold cleaners include, but are not limited to, remote reservoirs, spray sinks, batchloaded dip tanks, and cold conveyorized degreasers. Cold cleaners do not include gas/liquid-path cleaners. 

[Link to Note 

No.35]
STAFF REPORT - Rule 321 Page F-7

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 7 September 18, 1997[date of amended rule adoption]

“Cold Cleaning Machine” means any device or piece of equipment that contains and/or uses liquid 

solvent, into which parts are placed to remove soils from the surfaces of the parts or to dry the parts. 

Cleaning machines that contain and use heated, nonboiling solvent to clean the parts are classified as cold 

cleaning machines. Cold solvent wash stations are classified as cold cleaning machines.

“Condenser” or “Primary Condenser” means a device, such as cooling coils, used to condense (liquify) 

solvent vapor series of circumferential cooling coils on a vapor cleaning machine through which a chilled 

substance is circulated or recirculated to provide continuous condensation of rising solvent vapors and, 

thereby, create a concentrated solvent vapor zone.

“Condenser Flow Switch” means a safety switch connected to a thermostat that shuts off the sump heater 

if the condenser coolant is either not circulating or exceeds its designed operating temperature. 

“Continuous Cleaning Machine” see “In-Line Cleaning Machine.”

“Continuous Web Cleaning Machine” means a solvent cleaning machine in which parts such as film, 

coils, wire, and metal strips are cleaned at speeds typically in excess of 11 feet per minute. Parts are 

generally uncoiled, cleaned such that the same part is simultaneously entering and exiting the solvent 

application area of the solvent cleaning machine, and then recoiled or cut. For the purposes of this rule, all 

continuous web cleaning machines are considered to be a subset of in-line solvent cleaning machines.

“Control Device” means a device for reducing emissions of reactive organic compounds to the 

atmosphere. [Link to Note No. 36]

“Conveyorized (In-Line or Continuous) Cold Solvent CleanerCleaning Machine” means any 

continuously loaded solvent cleaner solvent cleaning machine that is not a conveyorized vapor solvent 

cleanercleaning machine. 

“Conveyorized (In-Line or Continuous) Solvent CleanerCleaning Machine” means any conveyorized 

cold or vapor solvent cleaner cleaning machine, that uses an automated parts handling system to 

automatically provide a continuous supply of parts to be cleaned. including Conveyorized (in-line or 

continuous) cleaning machines include but are not limited to gyro, vibra, monorail, cross-rod, mesh, belt, 

web, and strip cleanerscleaning machines. Strip cleaners cleaning machines clean material by drawing the 

strip itself through the unit for cleaning prior to coating or other fabrication processes. For the purposes of 

this rule “Conveyorized (In-Line or Continuous) Cleaning Machine” has the same meaning as “In-Line 

Cleaning Machine.” [Link to Note No. 37]

“Conveyorized (In-Line or Continuous) Vapor Solvent Cleaner Cleaning Machine” means any 

continuously loaded solvent cleaner cleaning machine that immerses parts in boiling solvent or in solvent 

vapors generated by boiling solvent. Conveyorized vapor solvent cleaners (in-line or continuous) cleaning 

machines that contain any vapor cleaning sections shall be considered to be conveyorized vapor solvent 

cleanerscleaning machines for the purposes of this rule.

“Cross-Rod Solvent Cleaning Machine” means a batch solvent cleaning machine in which parts baskets 

are suspended from “cross-rods” as they are moved through the machine. In a cross-rod cleaning machine, 

parts are loaded semi-continuously, and enter and exit the machine from a single portal. 

“Degreaser” means any equipment designed and used for holding a solvent to carry out solvent cleaning 

operations. Degreasers include, but are not limited to, remote reservoir cold cleaners, batch-loaded cold 

cleaners, open-top vapor solvent cleaners, and conveyorized solvent cleaners. All degreasers can be 

classified as one of the following: 1) cold cleaner (including remote reservoir cold cleaners), 2) batchloaded vapor solvent cleaner, or 3) conveyorized solvent cleaner. [Link to Note No. 38]

“Downtime Mode” means the time period when a solvent cleaning machine is not cleaning parts and the 

sump heating coils, if present, are turned off.
STAFF REPORT - Rule 321 Page F-8

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 8 September 18, 1997[date of amended rule adoption]

“Drag-out” or “Carry-out” means solvent carried out of a cleaner solvent cleaning machine that adheres 

to or is entrapped in the part being removed. 

“Drying Tunnel” means an add-on enclosure extending from the exit area of a conveyorized degreaser 

solvent cleaning machine that reduces drag-out losses by containing evaporating solvent. 

“Dwell” means the technique of holding parts within the freeboard area but above the vapor zone of the 

solvent cleaning machine. Dwell occurs after cleaning to allow solvent to drain from the parts or parts 

baskets back into the solvent cleaning machine.

“Dwell Time” means the period of time when parts are held within the freeboard area of the solvent 

cleaning machine, after cleaning, to allow solvent to drain from the parts back into the solvent cleaning 

machine.

“Electrical Apparatus Components” means the internal components such as wires, windings, stators, 

rotors, magnets, contacts, relays, energizers, and connections in an apparatus that generates or transmits 

electrical energy including, but not limited to: alternators, generators, transformers, electric motors, cables, 

and circuit breakers, except for the actual cabinet in which the components are housed. Electrical 

components of graphic arts application equipment and hot-line tools are also included in this category.

“Electronic Components” means the portions of an assembly, including, but not limited to: circuit card 

assemblies, printed wire assemblies, printed circuit boards, soldered joints, ground wires, bus bars, 

magnetic tapes and tape drive mechanisms, discs and disc drive mechanisms, electro-optical devices (e.g., 

optical filters, sensor assemblies, infrared sensors, charged coupled devices, thermal electric coolers, and 

vacuum assemblies), solid state components, semiconductors (e.g., diodes, zeners, stacks, rectifiers, 

integrated microcircuits, transistors, solar cells, light sensing devices, and light-emitting devices), and other 

electrical fixtures, except for the actual cabinet in which the components are housed. [Link to Note No. 39]

“Emulsion” means a suspension of small droplets of one liquid in a second liquid. 

“Emission Control Device” means a device for reducing emissions of reactive organic compounds or 

toxic air contaminants to the atmosphere.

“Evaporation” means to change into a vapor, normally from a liquid state. 

“Evaporative Surface Area” means:

(1) Cold Solvent Cleaner:

(a) The surface area of the top of the solvent.(b) Remote Reservoir Cold Cleaner: 

The solvent drain opening area.

(2) Vapor Solvent Cleaner: The surface area of the top of the solvent vapor-air interface.

(3) Conveyorized Solvent Cleaner:

(a) Cold Cleaner: The surface area of the top of the solvent.

(b) Remote Reservoir Cold Cleaner: The solvent drain opening area.

(c) Vapor Solvent Cleaner: The surface area of the top of the solvent vapor-air 

interface. [Link to Note No. 40]

“Existing Solvent Cleaning Operation” means solvent cleaning that is being performed as of [date of 

revised rule adoption].

“Existing Solvent Cleaning Machine” means any solvent cleaning machine that is installed as of [date of 

revised rule adoption].

“Fluid System” means a power transmission system that uses the force of flowing liquids and gases to 

transmit power. Fluid systems include hydraulic systems and pneumatic systems. 
STAFF REPORT - Rule 321 Page F-9

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 9 September 18, 1997[date of amended rule adoption]

“Freeboard Area” means; for a batch cleaning machine, the area within the solvent cleaning machine that 

extends from the solvent/air interface to the top of the solvent cleaning machine; for an in-line cleaning 

machine, it is the area within the solvent cleaning machine that extends from the solvent/air interface to the 

bottom of the entrance or exit opening, whichever is lower.

“Freeboard Height” means:

(1) Cold Solvent Cleaner: The vertical distance from the top of the solvent, or the solvent 

drain of a remote reservoir cold cleaner, to the top of the cold cleaner.

(2) Batch-loaded Vapor Solvent Cleaner: The vertical distance from the top of the solvent 

vapor-air interface to the top of the solvent cleaner.

(3) Conveyorized Solvent Cleaner: 

(a) For non-boiling solvent, the vertical distance from the top of the solvent to the 

bottom of the lowest opening in the solvent cleaner where vapors can escape.

(b) For boiling solvent, the vertical distance from the top of the solvent vapor-air 

interface to the bottom of the lowest opening in the degreaser where vapors can 

escape.

“Freeboard Height” means; for a batch cleaning machine, the distance from the solvent/air interface as 

measured during the idling mode or the top of the solvent drain of a remote reservoir cold cleaning machine 

to the top of the cleaning machine; for an in-line cleaning machine, it is the distance from the solvent/air 

interface to the bottom of the entrance or exit opening, whichever is lower as measured during the idling 

mode. 

“Freeboard Ratio” means the ratio of the solvent cleaning machine freeboard height divided by the 

smaller of the inside length or the inside width (or diameter if applicable) of the solvent cleaner evaporative 

area to the smaller interior dimension (length, width, or diameter) of the solvent cleaning machine. 

“Freeboard Refrigeration Device (Also Called a „Chiller‟)” means a secondary cooling coil mounted 

above the primary condenser that provides a chilled air blanket above the solvent vapor air-interface to 

cause the condensation of additional solvent vapor. A primary condenser capable of meeting the 

requirements of Section J.9.a or L.10.a is defined as both a freeboard refrigeration device and a primary 

condenser for the purposes of this rule. 

“Gas/Liquid-Path Solvent Cleaner” means a solvent cleaning machine (including ancillary equipment)

that applies solvent to the interior of parts, a gas turbine or jet engines, or equipment to clean gas and/or 

liquid paths. Gas/liquid-path cleaning operations include, but are not limited to, for the removal of 

corrosion, or combustion deposits, propellants, moisture, residuals, or other undesirable matter. Examples 

of gas/liquid-path cleaners include, but are not limited to, corrosion control carts (e.g., used on the interiors 

of gas turbine or jet engines), valve flushing systems, rocket engine flushing equipment, rocket propellant

transfer line flushing and purging systems. [Link to Note No. 41]

“General Work Surface” means an area of a medical device or pharmaceutical facility where solvent 

cleaning is performed on work surfaces including, but not limited to, tables, countertops, and laboratory 

benches. General work surface shall not include items defined under janitorial cleaning.

“Guillotine Cover” means a cover that is biparting and moves in the same plane.

“Halogenated Hazardous Air Pollutant Solvent” means methylene chloride (Chemical Abstracts Service

No. 75-09-2), perchloroethylene (Chemical Abstracts Service No. 127-18-4), trichloroethylene (Chemical 

Abstracts Service No. 79-01-6), 1,1,1-trichloroethane (Chemical Abstracts Service No. 71-55-6), carbon 

tetrachloride (Chemical Abstracts Service No. 56-23-5), and chloroform (Chemical Abstracts Service No. 

67-66-3).
STAFF REPORT - Rule 321 Page F-10

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 10 September 18, 1997[date of amended rule adoption]

“High-Precision Optics” means any optical element used in an electro-optical device that is designed to 

sense, detect, or transmit light energy, including specific wavelengths of light energy and changes in light 

energy levels.

“High Vapor Cutoff Thermostat” means a device, with a manual reset, that shuts off the sump heater if 

the temperature at the air-vapor interface rises above the designed operating level. 

“High Volatility Solvent” means any solvent that is not classified as a low volatility solvent. [Link to Note 

No. 42]

“Hoist” means a mechanical device that carries the parts basket and the parts to be cleaned from the 

loading area into the solvent cleaning machine and to the unloading area at a controlled speed. A hoist may 

be operated by controls or may be programmed to cycle parts through the cleaning cycle automatically. 

“Idling Mode” means the time period when a solvent cleaning machine is not actively cleaning parts and 

the sump heating coils, if present, are turned on.

“Initial Boiling Point” means the boiling point of a solvent liquid as defined by ASTM D 1078-9505,

“Standard Test Method for Distillation Range of Volatile Organic Liquids,” ASTM International.

“In-Line CleanerCleaning Machine” or “Continuous Cleaning Machine” means conveyorized solvent 

cleaner any solvent cleaning machine that uses an automated parts handling system, typically a conveyor, 

to automatically provide a continuous supply of parts to be cleaned. These units are fully enclosed except 

for the conveyor inlet and exit portals. In-line cleaning machines can be either cold or vapor cleaning 

machines. [Link to Note No. 43]

“Lip Exhaust” means a system that collects solvent vapors escaping from the top of a solvent cleaner

device installed at the top of the opening of a solvent cleaning machine that draws in air and solvent vapor 

from the freeboard area and ducts the air and vapor away from the solvent cleaning machine.

“Liquid Leak” means any ROC-containing liquid solvent leak at a rate of more than three drops per 

minute or any visible liquid mist.

“Low Volatility Solvent” means a solvent with an initial boiling point that is greater than 120 degrees 

Celsius (248 degrees Fahrenheit) and with a temperature, as used, at least 100 degrees Celsius (180 212 

degrees Fahrenheit) below the initial boiling point. [Link to Note No. 44]

“Make-Up Solvent” means that solvent added to the solvent cleaning operation to replace solvent lost 

through evaporation or other means.

“Maintenance Cleaning” means a solvent cleaning operation or activity carried out to keep clean general 

work areas where manufacturing or repair activity is performed, to clean tools, machinery, molds, forms, 

jigs and equipment. This definition does not include the cleaning of adhesive, coating, or ink application 

equipment.

“Manufacturing Process” means the process of making goods or articles by hand or by machinery.

“Medical Device” means an instrument, apparatus, implement, machine, contrivance, implant, in vitro 

reagent or other similar article, including any component, accessory, raw material, partial or completed 

fabricated part, that meets one of the following conditions:

1. It is intended for use in the diagnosis of disease or other conditions, or in the cure, 

mitigation, treatment, or prevention of disease; or

2. It is intended to affect the structure or any function of the body; or
STAFF REPORT - Rule 321 Page F-11

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 11 September 18, 1997[date of amended rule adoption]

3. It is defined in the National Formulary or the United States Pharmacopeia, or any 

supplement to them.

“Mixer” means any device that mechanically agitates the liquid solvent to enhance the cleaning process.

“Nonabsorbent Container” means any container made of nonporous material, which does not allow the 

migration of the liquid solvent through it.

“Nonatomized Solvent Flow” means the use of a solvent in the form of a liquid stream without 

atomization.

“Nonleaking Container” means a container without any liquid leaks.

“Open-Top Vapor Solvent CleanerCleaning Machine” means any batch-loaded degreaser using solvent 

that is maintained above the initial boiling point temperature of the solvent. Degreasing occurs through the 

condensation of the resultant solvent vapor onto the surface of the workload a batch solvent cleaning 

machine that has its upper surface open to the air and boils solvent to create solvent vapor used to clean 

and/or dry parts. 

“Primary Condenser” see “Condenser.”

“Radiation-Effect Coating” means a material that prevents radar detection.

“Reactive Organic Compound Composite Partial Pressure” means the sum of the partial pressures of 

compounds defined as reactive organic compounds. Reactive organic compound composite pressure shall 

be calculated as follows:

Where: 

 Wi = Weight of the “i”th reactive organic compound, in grams 

 Ww = Weight of water, in grams 

 We = Weight of the “e”th exempt organic compound, in grams 

 MWi = Molecular weight of the “i”th reactive organic compound, in grams per grams-mole 

 MWw = Molecular weight of water, in grams per grams-mole

 MWe = Molecular weight of the “e”th exempt compound, in grams per grams-mole

 PPc = Reactive organic compound composite partial pressure at 20 degrees Celsius, in millimeters of

mercury 

 VPi = Vapor pressure of the “i”th reactive organic compound at 20 degrees Celsius, in millimeters of

mercury

“Refrigerated Freeboard Chiller” means a secondary cooling coil mounted above the primary condenser 

that provides a chilled air blanket above the solvent vapor air-interface to cause the condensation of 

additional solvent vapor. see the definition for “Freeboard Refrigeration Device (also called a 

„Chiller‟).”

“Remote Reservoir Cold Cleaner Cleaning Machine” means any device in which liquid solvent is 

pumped through to a sink-like work area for cleaning parts and that drains immediately solvent back into an 

enclosed container while parts are being cleaned, without forming a allowing no solvent to pool in the work 
STAFF REPORT - Rule 321 Page F-12

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 12 September 18, 1997[date of amended rule adoption]

area, through a single drain hole less than 100 square centimeters (15.5 square inches) in area into an 

enclosed container that is not accessible for soaking parts. A remote reservoir cold cleaning machine that 

uses an enclosed container that is accessible for dipping or soaking parts is also considered to be a batch 

cleaning machine.

“Repair Cleaning” means a solvent cleaning operation or activity carried out during a repair process.

“Repair Process” means the process of returning a damaged object or an object not operating properly to 

good condition.

“Research and Development” means a facility or portion thereof used to further the development of 

useful materials, devices, systems, or methods, including, but not limited to, design, development, and 

improvement of prototypes and processes. Research and development does not include the manufacturing 

process itself.

“Rotating Basket” means a perforated or wire mesh cylinder containing parts to be cleaned that is slowly 

rotated while proceeding through the degreaser solvent cleaning machine. 

“Scientific Instrument” means an instrument (including the components, assemblies, and subassemblies 

used in their manufacture) and associated accessories and reagents that is used for the detection, 

measurement, analysis, separation, synthesis, or sequencing of various compounds.

“Semiconductor Manufacturing” means any process or operation producing semiconductor material, 

slicing or polishing semiconductor material, utilizing photoresist to manufacture intermediate products, or 

producing either semiconductor devices or related solid state devices. 

“Silicone Manufacturing” means any process or operation producing a silicone raw material (e.g., 

polymer, fluid, gum, gel, elastomer, dispersion, or other bulk state silicone material). Silicone 

manufacturing also includes any on site preliminary processes or operations that occurs before a silicone 

raw material is produced. 

“Soils” mean contaminants that are removed from the part or parts being cleaned. Soils include, but are 

not limited to, grease, oils, waxes, metal chips, carbon deposits, fluxes, and tars. 

“Solvent” means “Organic Solvent.”any liquid containing any reactive organic compound or any toxic air 

contaminant, which is used as a diluent, thinner, dissolver, viscosity reducer, cleaning agent, drying agent, 

preservative, or other similar uses. [Link to Note No. 45]

“Solvent/Air Interface” means, for a vapor cleaning machine, the location of contact between the 

concentrated solvent vapor layer and the air. This location of contact is defined as the mid-line height of 

the primary condenser coils. For a cold cleaning machine, it is the location of contact between the liquid 

solvent and the air. 

“Solvent/Air Interface Area” means; for a vapor cleaning machine, the surface area of the solvent vapor 

zone that is exposed to the air; for an in-line cleaning machine, it is the total surface area of all the sumps; 

for a cold cleaning machine, it is the surface area of the liquid solvent that is exposed to the air, except for 

remote reservoir cleaning machines, in which case it is the area of the drain.

“Solvent Cleaner” means a device that applies solvent or in which solvent is applied to items for the 

purpose of solvent cleaning. 

“Solvent Cleaning” means the use of organic solvent to remove loosely held uncured adhesives, uncured 

inks, uncured coatings, and other contaminants that include, but are not limited to, dirt, soil, lubricants, 

coolant, moisture, grease and fingerprints from parts, products, tools, machinery, equipment and general 

work areas. any activity, operation, or process (including, but not limited to, surface preparation, cleanup, 

or wipe cleaning) performed outside of a solvent cleaning machine, that uses solvent to remove uncured 

[Link to Note 

No.46]
STAFF REPORT - Rule 321 Page F-13

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 13 September 18, 1997[date of amended rule adoption]

adhesives, uncured coatings, uncured inks, uncured polyester resin material, uncured sealant, or other 

contaminants, including, but not limited to, dirt, soil, oil, lubricants, coolants, moisture, fingerprints, and 

grease, from parts, products, tools, machinery, application equipment, and general work areas. Cleaning 

spray equipment used for the application of coating, adhesive, ink, polyester resin material, or sealant is 

also considered to be solvent cleaning irrespective of the spray material being cured. [Link to Note No. 47]

“Solvent Cleaning Machine” means any device or piece of equipment that uses solvent liquid or vapor to 

remove soils, moisture, or other contaminants from the surfaces of materials. Types of solvent cleaning 

machines include, but are not limited to, batch cold, batch vapor, in-line cold, in-line vapor, remote 

reservoir, and gas-path solvent cleaners. Buckets, pails, and beakers with capacities of 3.785 liters (1.00 

gallon) or less are not considered solvent cleaning machines. However, the use of such a container or 

similar containers (e.g., hand-held spray bottles) with a liquid solvent for cleaning is considered to be 

solvent cleaning. Any device or piece of equipment used exclusively for stripping shall not be considered 

to be a solvent cleaning machine. [Link to Note No. 47]

“Solvent Container” means that part of the solvent cleaner cleaning machine that is intended to hold the 

cleaning solvent. 

“Solvent Vapor Zone” means; for a vapor cleaning machine, the area that extends from the liquid solvent 

surface to the level that solvent vapor is condensed. This condensation level is defined as the midline 

height of the primary condenser coils. 

“Space Vehicle” means a vehicle designed to travel beyond the earth‟s atmosphere.

“Space Vehicle Component” means any raw material, partial or completed fabricated part, assembly of 

parts, or completed unit of any space vehicle, including mockups and prototypes.

“Spray Pump Control Switch” means a safety switch that prevents the spray pump from operating if the 

vapor level falls below the design operating level. 

“Sump” means the part of a solvent cleaning machine where the liquid solvent is located. 

“Sump Heater Coils” mean the heating system on a cleaning machine that uses steam, electricity, or hot 

water to heat or boil the liquid solvent. 

“Superheated Vapor System” means a system that heats the solvent vapor, either passively or actively, to 

a temperature above the solvent's initial boiling point. Parts are held in the superheated vapor before 

exiting the machine to evaporate the liquid solvent on them. Hot vapor recycle is an example of a 

superheated vapor system.

“Superheated Vapor Zone” means any region located within the vapor zone of a vapor cleaning machine 

whereby solvent vapors are heated above the solvent‟s initial boiling point.

“Ultrasonics” means enhancement of the cleaning process by agitation of liquid solvents with high 

frequency sound wave vibrations. 

“Vapor Cleaning Machine” means a batch or in-line solvent cleaning machine that boils liquid solvent 

generating solvent vapor that is used as a part of the cleaning or drying cycle.

“Vapor Level Control Switch or Vapor Level Control Thermostat” see “High Vapor Cutoff 

Thermostat.” 

“Vapor Solvent Cleaner” means any solvent cleaners that cleans through the condensation of hot solvent 

vapor on colder workloads. 
STAFF REPORT - Rule 321 Page F-14

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 14 September 18, 1997[date of amended rule adoption]

“Waste Solvent Residue” means sludge that may contain dirt, oil, metal particles, and/or other undesirable 

waste products concentrated after heat distillation of the waste solvent either in the solvent cleaner cleaning 

machine itself or after distillation in a separate still. 

“Water Layer” means a layer of water that floats above the denser solvent and provides control of solvent 

emissions. In many cases, the solvent used in batch cold cleaning machines is sold containing the 

appropriate amount of water to create a water cover.

“Wipe Cleaning” means that method of cleaning that uses a material such as a rag wetted with a solvent, 

coupled with a physical rubbing process to remove contaminants from surfaces. 

“Workload” means the objects put in a cleaner solvent cleaning machine for the purpose of removing oil, 

grease, soil, coating, dirt, moisture, or other undesirable matter from the surface of the objects. 

“Workload Area” means:

(1) The plane geometric surface area of the top of the submerged parts basket, or

(2) The combined plane geometric surface area(s) displaced by the submerged workload, if 

no basket is used.

D. General Operating Requirements. Any person who owns, operates, or uses any solvent cleaner cleaning 

machine or performs any solvent cleaning shall ensure such operation conforms to the following operating 

requirements:

1. All Ssolvent, including waste solvent and waste solvent residue, and waste solvent cleaning 

materials such as cloth, paper, etc. shall not be stored or disposed of in a manner that will cause or 

allow evaporation into the atmospherein nonabsorbent and nonleaking containers equipped with 

tight-fitting covers. The covers shall be in place unless adding material to or removing material 

from the containers, the containers are empty, or doing maintenance/inspection of the containers. 

Containers shall have a label indicating the name of the solvent/material they contain. After 

distillation recovery of waste solvent, solvent residues shall not contain more than 20 percent 

solvent of reactive organic compound by weight. 

2. The solvent cleanercleaning machine, ventilation system, and/or emission control equipment shall 

be installed, operated, and maintained in proper working order consistent with the manufacturer‟s 

specifications. 

3. Solvent The cleaning or solvent vapor cleaning of porous or absorbent materials, such as cloth, 

leather, wood, or rope, is prohibited. This provision shall not apply to paper gaskets, paper filters, 

and medical devices.

4. The All solvent containers holding solvent shall be free of all liquid leaks. Auxiliary cleaner 

Solvent cleaning machine equipment, such as covers, pumps, water separators, steam traps, or 

distillation units shall not have any liquid leaks, visible tears, holes, or cracks. Any such liquid 

leak, visible tear, hole, or crack that is detected shall be repaired within one day from discovery by 

the operator, or the cleaner solvent cleaning machine shall be drained of all solvent, in a manner 

authorized by this Ruleconsistent with Section D.12 provisions, and shut down until replaced or 

repaired. Solvent cleaners cleaning machines shall not be operated when leaking. 

5. Covers and other closure devices (e.g., valves or drain plugs) designed to reduce solvent 

evaporation shall not be removed or opened except to process work or to perform monitoring, 

inspections, maintenance, or repairs that require the removal of the covers or other closure 

devices. Solvent cleaning machines shall not be operated when performing maintenance or 

repairs. 

[Link to Note 

No. 48]
STAFF REPORT - Rule 321 Page F-15

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 15 September 18, 1997[date of amended rule adoption]

6. For solvent degreaser cleaning machine operations other than gas-path solvent cleaners and 

continuous web cleaning machines, solvent carry-out shall be minimized by the following 

methods, as applicable:

a. Except for remote reservoir cold cleaning machines, The the workload shall be racked. 

b. For manual operations, any pools of solvent remaining on the cleaned parts shall be 

tipped out before removing them from the cleaner.Parts having cavities, holes, or blind 

holes shall be tipped or rotated before being removed from the solvent cleaning machine 

such that the solvent in the cavities, holes, or blind holes is returned to the solvent 

container.

c. Pools of solvent shall be drained by a device. 

dc. The workload shall be drained within the freeboard area so that the drained solvent is 

returned to the solvent container. 

ed. For cold solvent cleaning, parts shall be drained immediately after cleaning, until one of 

the following conditions exists:

1) At least 15 seconds have elapsed; or

2) Dripping of solvent ceases; or

3) The parts become visibly dry.

fe. For automated parts handling systems, Tthe workload shall be moved in and out of the 

degreaser solvent cleaning machine at less than 3.33.4 meters per minute (11.2 feet per 

minute). 

7. For solvent degreaser cleaning machine operations other than gas-path solvent cleaners and 

continuous web cleaning machines, solvent flow shall be directed downward to avoid turbulence 

at the air-vapor or air-solvent solvent/air interface and to prevent liquid solvent from splashing 

outside of the cleanersolvent cleaning machine. If a flexible hose or flushing device is used, 

flushing shall be performed only within the freeboard area of the solvent cleaning machine.

8. For solvent degreaser cleaning machine operations other than gas-path solvent cleaners and 

continuous web cleaning machines, solvent flow shall not be used in a manner such that liquid 

solvent splashes outside the container. 

9. Solvent atomization operations (e.g., blow drying) shall not be atomized unless be it is vented to 

an emission control system that meets the requirements of Rule 321 Section MN.

10. Any solvent spills shall be wiped up immediately and the used absorbent material (e.g., cloth, 

paper, sand, sawdust, etc.) shall be stored in closed containers that are handled in accordance with 

Section D.1.

11. Solvent levels shall not exceed the solvent cleaning machine‟s fill line.

12. Draining or filling solvent containers shall be performed at a level lower than the liquid solvent 

surface.

13. When using a ventilation fan, it shall not be positioned in such a way as to direct air flow near a 

solvent cleaning machine opening. [Link to Note No. 50]

[Link to Note 

No.49]
STAFF REPORT - Rule 321 Page F-16

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 16 September 18, 1997[date of amended rule adoption]

E. Additional Operating Requirements for Open-top Batch Vapor Solvent Cleaners Cleaning Machines 

and In-Line Conveyorized Vapor Solvent CleanersCleaning Machines. In addition to the general 

operating requirements specified above in Rule 321 Section D, aAny person who owns, operates, or uses 

any open-top batch vapor solvent cleaner cleaning machine or any conveyorized in-line vapor solvent 

cleaner cleaning machine shall ensure the equipment operation conforms to the following operating 

requirements:

1. The degreaser shall be covered whenever the cooling system is off. Except to perform monitoring, 

inspections, maintenance, or repairs that require the removal of the covers:

a. Idling mode covers shall be closed or in place when the equipment is in an idling mode.

b. Downtime mode covers shall be closed or in place when the equipment is in a downtime 

mode. 

2. When starting the degreaser solvent cleaning machine, the cooling system primary condenser shall 

be turned on before or simultaneously with the sump heater. 

3. When shutting down the degreaser solvent cleaning machine, the sump heater shall be turned off 

and the solvent vapor layer allowed to collapse before or simultaneously with the cooling system

primary condenser is turned off. 

4. The workload shall be degreased cleaned in the vapor zone for at least 30 seconds or until 

condensation ceases. 

5. Parts shall be allowed to dry within the degreaser solvent cleaning machine until the exterior 

surface of the parts become visually dry. 

6. Solvent spray shall be kept at least 10 centimeters (3.94 inches) below the air-vapor solvent/air 

interface. 

7. The workload area shall not occupy more than half of the evaporative surface areasolvent/air 

interface area of the solvent cleaner cleaning machine. 

8. For cleaners solvent cleaning machines equipped with water separators, water shall not be visibly 

detectable in the solvent phase exiting the water separator, nor shall solvent be visibly detectable 

in the aqueous phase leaving the separator. 

9. If equipped with a superheated vapor zone:

a. The manufacturer's specifications for determining the minimum proper dwell time within 

the superheated vapor system shall be followed. 

b. Parts and parts baskets shall remain in the vapor zone for at least the minimum proper 

dwell time. 

c. The temperature within the superheated vapor zone shall be at least 10 degrees 

Fahrenheit above the initial boiling point of the solvent being used.

F. Additional Operating Requirements for Gas/Liquid-Path CleanersSolvent Cleaners. In addition to 

the operating requirements specified in Rule 321 Sections D.1 - D.5 and D.9, aAny person who owns, 

operates, or uses using any gas/liquid-path cleaner gas-path solvent cleaner shall ensure the equipment 

operation conforms to the following operating requirements:

1. Cleaned parts or equipment shall be drained until dripping ceases or 15 seconds have elapsed.
STAFF REPORT - Rule 321 Page F-17

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 17 September 18, 1997[date of amended rule adoption]

2. The cover of the solvent container(s), reservoir(s) and opening(s) of a solvent collection system 

shall be closed at all times except when the reservoir is being filled, emptied, cleaned, repaired or 

inspected to process work or to perform monitoring, inspections, maintenance, or repairs that 

require the removal of the covers or other closure devices.

G. General Equipment Requirements for Solvent CleanersCleaning Machines. Any person who owns, 

operates, or uses All any solvent cleaners cleaning machine shall ensure that it is equipped with conform to 

the following requirements:

1. A container shall be used for the solvent. 

2. Except for remote reservoir cold cleaners cleaning machines using low volatility solvents, all 

cleaners shall be equipped with an apparatus or cover(s) to completely cover the solvent container 

when not processing work. 

3. Solvent degreasers shall be equipped with a facility Except for gas-path solvent cleaners using a 

solvent with a reactive organic compound content of 50 grams per liter of material or less, an 

apparatus or a device for draining cleaned parts such that the drained solvent or drag-out is 

returned to the cleaner solvent tankcontainer. 

4. The A list of the applicable operating requirements. At a minimum, the list shall include the 

applicable operating requirements contained in Rule 321 Sections D, E, and F. The list of 

operating requirements shall be legibly written legible and permanently and conspicuously posted 

or maintained on or near the equipment in such a manner that it is conveniently available to the 

operator for reference purposes. 

5. Where solvent agitation is used, the equipment that achieves agitation shall be achieved by use of 

using pump recirculation, mechanical mixing (a mixer), or ultrasonics. Gas or air agitation shall 

not be used. When a pump-agitated solvent bath is used, the pump agitator shall be designed to 

produce a rolling motion of the solvent without any observable splashing against tank walls or 

parts being cleaned.

6. When employing solvent flow, with a solvent degreaser, the flow shall only be a flexible hose or 

flushing device that produces only a continuous fluid stream. An atomized or shower type spray 

shall not be used. I unless it is used in an conveyorized in-line or enclosed cleanersolvent cleaning 

machine, a shower type spray may be used provided that where the spray is conducted in a totally 

confined space that is sealed from the atmosphere. 

7. Any degreaser equipped with Where a hood, enclosure, or lip exhaust, or a lip exhaust connected 

to a hood or enclosure is employed, shall not have an a blower or fan such that the air ventilation 

rate in excess of shall not exceed 20 cubic meters per minute per square meter (65.6 cubic feet per 

minute per square feet) of air-vapor or air-solvent solvent/air interface surface area, unless 

necessary to meet a National Institute for Occupational Safety and Health standard. 

8. Effective July 17, 1997, no person shall install or add a lip exhaust to a degreaser When a lip 

exhaust unless it is is installed or added after July 17, 1997,vented to an emission control system 

that meets the requirements of Rule 321 Section M N. 

9. A The average draft rate in the solvent cleaner workroom having an average draft rate, as 

measured parallel to the plane of the degreaser solvent cleaning machine opening, shall not 

exceeding 9.1 meters per minute (30 feet per minute), unless necessary to meet a National 

Institute for Occupational Safety and Health standard.

10. Ventilation fans shall not be positioned in such a way as to direct air flow near the degreaser 

openings. 
STAFF REPORT - Rule 321 Page F-18

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 18 September 18, 1997[date of amended rule adoption]

1110. When employing an automated parts handling system, The vertical equipment such that the speed 

of any powered hoist or conveyor of the parts shall not exceed 3.33.4 meters per minute (11.2 feet 

per minute).

H. Additional Equipment Requirements for Remote Reservoir Cold CleanersCleaning Machines. In 

addition to the requirements in Rule 321 Section G, Any person who owns, operates, or uses any remote 

reservoir cold cleaner equipment cleaning machine shall ensure that it is equipped with meet the following

requirements:

1. The A sink or work area shall be that is sloped sufficiently towards the drain to prevent pooling of 

solvent.

2. There shall be aA single drain hole, not larger than 100 square centimeters (15.5 square inches) in 

area, for the solvent to flow from the sink into the enclosed reservoir. 

3. Except for remote reservoir cold cleaners when using low volatility solvents, a cover or a device, 

such as a valve or a drain plug, to prevent or minimize the solvent vapor emissions shall be 

prevented from escaping from the solvent container by means of closing a cover or a device, such 

as a valve or a drain plug, when the remote reservoir is not being used, cleaned, or repaired not 

processing work or performing monitoring, inspections, maintenance, or repairs that require the 

removal of the cover or device. 

4. The A freeboard height shall be of 6 inches or higher. 

5. The unit shall have a When the solvent is heated above 50 degrees Celsius (122 degrees 

Fahrenheit), or it is agitated, or the solvent is a high volatility solvent, dimensions such that the 

freeboard ratio of is 0.75 or greater., if the solvent is heated above 50 degrees Celsius (122 degrees 

Fahrenheit), agitated, or a high volatility solvent is used.

6. In lieu of the freeboard height required by Rule 321 Section H.4 or the freeboard ratio required by 

Rule 321 Section H.5, one of the following requirements shall may be met:

a. a A water cover layer at a minimum thickness of 2.5 centimeters (1.0 inch) on the surface 

of the solvent within the cleaning machine at least 1 inch deep shall be used, provided the 

solvent is insoluble in water and has a specific gravity greater than 1, or

b. aAn emission control system that meets the requirements of Rule 321 Section M N shall 

be used.

7. Effective [one year from the date of revised rule adoption], except when using an emission control 

system that meets the requirements of Section N, solvent that contains 50 grams of reactive 

organic compound per liter of material or less. [Link to Note No. 51]

I. Additional Equipment Requirements for Batch Cold CleanersCleaning Machines. In addition to the 

requirements specified in Rule 321 Section G, Any person who owns, operates, or uses any batch cold 

cleaners cleaning machine other than a remote reservoir cold cleaning machine shall ensure that it is 

equipped with include all of the following:

1. When using a high volatility solvent, the unit shall be equipped with a cover that is a sliding, 

rolling, or guillotine type that is designed to easily open and close. If a mechanized batch cold 

cleaning machine (e.g., a manually loaded or semi-continuously loaded Ferris wheel or cross-rod 

solvent cleaning machine) is used with a high volatility solvent, the unit shall be equipped with a 

downtime mode cover.

2. A method for draining cleaned parts, so the drained solvent is returned to the container. If using a 

high volatility solvent, the drainage facility apparatus or device required by Section G.3 shall be 

[Link to Note 

No.52]
STAFF REPORT - Rule 321 Page F-19

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 19 September 18, 1997[date of amended rule adoption]

internal so that the cleaned parts are within the solvent cleaner cleaning machine and under the 

cover while draining. The drainage facility apparatus or device may be external where the internal 

type cannot fit into the cleaning system provided the drained solvent is returned to the solvent 

container. 

3. When using a low volatility solvent that is not agitated, the a freeboard height shall be of 6 inches 

or higher or dimensions such that a the freeboard ratio of is 0.5 or greater shall be maintained. 

4. The unit shall have a When the solvent is heated above 50 degrees Celsius (122 degrees 

Fahrenheit), or it is agitated, or the solvent is a high volatility solvent, dimensions such that the 

freeboard ratio of is 0.75 or greater., if the solvent is heated above 50 degrees Celsius (122 degrees 

Fahrenheit), agitated, or a high volatility solvent is used.

5. In lieu of the freeboard height or freeboard ratio required by Rule 321 Section I.3 or the freeboard 

ratio required by Section I.4, one of the following requirements may be met:

a. a water cover at least 1 inch deep shall be used, provided the solvent is insoluble in water 

and has a specific gravity greater than 1A water layer at a minimum thickness of 2.5 

centimeters (1.0 inch) on the surface of the solvent within the cleaning machine shall be 

used, or 

b. aAn emission control system shall be used that meets the requirements of Rule 321 

Section M N shall be used.

6. A permanent, conspicuous mark shall be maintained locating denoting the maximum allowable 

solvent level conforming to the applicable freeboard requirements. This requirement does not 

apply if employing a water cover layer or an emission control system per Rule 321 Section I.5.

7. Effective [one year from the date of revised rule adoption], except when using an emission control 

system that meets the requirements of Section N, solvent that contains 50 grams of reactive 

organic compound per liter of material or less. [Link to Note No. 53]

J. Additional Equipment Requirements for Open-top Batch Vapor Solvent CleanersCleaning 

Machines. In addition to the requirements specified in Rule 321 Section G, open-top Any person who 

owns, operates, or uses any batch vapor solvent cleaners cleaning machine shall ensure that it is equipped 

with include all of the following:

1. For open-top vapor cleaning machines, A a cover that is a sliding, rolling, or guillotine type that is 

designed to easily open and close without disturbing the vapor zone. This requirement does not 

apply to open-top vapor solvent degreasers cleaning machines equipped with top enclosures, 

provided:

a. the operator only opens the enclosure cover(s) or door(s) when the condenser is operative 

or when the degreaser solvent cleaning machine is shut down, and

b. the degreaser solvent cleaning machine evaporative surface areasolvent/air interface area

is less than 1 square meter (10.8 square feet), and

c. the degreaser solvent cleaning machine cover is designed such that it can be opened and 

closed easily without disturbing the vapor zone.

2. For mechanized batch vapor cleaning machines (e.g., a manually-loaded or semi-continuouslyloaded Ferris wheel or cross-rod solvent cleaning machine), idling and downtime mode covers.

23. A primary condenser coil situated above the boiling solvent. 
STAFF REPORT - Rule 321 Page F-20

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 20 September 18, 1997[date of amended rule adoption]

34. A condenser flow switch that automatically shuts off the sump heater if the condenser coolant 

stops circulating or becomes warmer than its designed operating temperature. 

45. A high vapor level cutoff thermostat control device that automatically shuts off the sump heater 

when if the solvent vapor level in the vapor cleaning machine rises above the designed operating 

level height of the primary condenser.

56. For degreasers solvent cleaning machines with solvent flow, a device such as a spray pump 

control switch that prevents the solvent flow pump operation unless the solvent vapor level is at 

the designed operating level.

7. A device that automatically shuts off the sump heat if the sump liquid solvent level drops to the 

sump heater coils. 

68. A Dimensions such that the freeboard ratio of is 0.75 or greater. Effective [one year from the date 

of revised rule adoption], the unit shall have dimensions such that the freeboard ratio is 1.0 or 

greater.

 

79. Cleaners For solvent cleaning machines with an evaporative surface areaa solvent/air interface 

area of 1 square meter (10.8 square feet) or greater shall be equipped with one of the following:

a. A refrigerated freeboard chiller freeboard refrigeration device for which the chilled air 

blanket temperature (expressed in degrees Fahrenheit) at the coldest point on the vertical 

axis in the center of the air-vapor interface air blanket shall be no greater than 30 percent 

of the initial boiling point (expressed in degrees Fahrenheit) of the solvent used or no 

greater than 40 degrees Fahrenheit. If the chiller operates below 32 degrees Fahrenheit, it 

shall be equipped with an automatic defrost.; or

b. An enclosed design in which the cover or door opens only when the dry part is actually 

entering or exiting the cleaner solvent cleaning machine.

810. In lieu of the freeboard ratio required by Rule 321 Section J.68 or the freeboard chiller/enclosed 

design required by Section J.79, an emission control system that meets the requirements of Section 

M N may be used. 

11. Effective [one year from the date of revised rule adoption], except when an emission control 

system that meets the requirements of Section N is employed, when using solvent containing in 

excess of 50 grams of reactive organic compound per liter of material:

a. An automated parts handling system;

b. A circumferential trough;

c. A water separator (not required for solvents that form azeotropes with water); 

d. A freeboard refrigeration device that is operated such that the chilled air blanket 

temperature, measured at the center of the air blanket, is no greater than 40 percent of the 

initial boiling point of the solvent, in degrees Fahrenheit, for solvents that do not form 

azeotropes with water, or 50 percent of the initial boiling point, in degrees Fahrenheit, for 

solvents that form azeotropes with water; and

e. A superheated vapor zone where parts remain in the vapor zone for at least the minimum 

dwell time, as specified by the manufacturer. The temperature within the superheated 

vapor zone shall be at least 10 degrees Fahrenheit above the initial boiling point of the 

solvent being used. [Link to Note No. 54]
STAFF REPORT - Rule 321 Page F-21

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 21 September 18, 1997[date of amended rule adoption]

K. Additional Equipment Requirements for Conveyorized In-Line Cold CleanersCleaning Machines. In 

addition to the requirements specified in Rule 321 Section G, conveyorized Any person who owns, 

operates, or uses any batch in-line cold cleaners cleaning machine shall ensure that it is be equipped with

the following:

1. A rotating basket, tumbling basket, drying tunnel, or other means that prevents cleaned parts from 

carrying out solvent liquid or vapor. 

2. Openings such that Tthe average clearance between workload material and the edges of the 

cleaner solvent cleaning machine entrance and exit openings shall be less than 10 centimeters 

(3.94 inches) or less than 10 percent of the opening width, whichever is less. 

3. Down-time mode covers for closing off the entrance and exit during shutdown hours, or an 

equivalent device that cover at least 90 percent of the opening. A continuous web part that 

completely occupies an entry and exit port when the machine is idle is considered to meet this 

requirement. 

4. A Dimensions such that the freeboard ratio of is 0.75 or greater that is physically verifiable. 

 

5. In lieu of the freeboard ratio required by Rule 321 Section K.4, use of an emission control system 

that meets the requirements of Section MN may be used.

6. Effective [one year from the date of revised rule adoption], except when using an emission control 

system that meets the requirements of Section N, solvent that contains 50 grams of reactive 

organic compound per liter of material or less. [Link to Note No. 55]

L. Additional Equipment Requirements for Conveyorized In-Line Vapor Solvent CleanersCleaning 

Machines. In addition to the requirements specified in Rule 321 Section G, conveyorized Any person who 

owns, operates, or uses any in-line vapor solvent cleaners cleaning machine shall ensure that it is be 

equipped with the following:

1. A rotating basket, tumbling basket, drying tunnel, or other means that prevents cleaned parts from 

carrying out solvent liquid or vapor. 

2. Openings such that Tthe average clearance between workload material and the edges of the 

cleaner solvent cleaning machine entrance and exit openings shall be less than 10 centimeters 

(3.94 inches) or less than 10 percent of the opening width, whichever is less. 

3. Idling and Ddown-time mode covers for closing off the entrance and exit during shutdown hours, 

or an equivalent device that cover at least 90 percent of the opening. A continuous web part that 

completely occupies an entry and exit port when the machine is idle is considered to meet this 

requirement. 

4. A primary condenser coil situated above the boiling solvent. 

5. A condenser flow switch that automatically shuts off the sump heater if the condenser coolant 

stops circulating or becomes warmer than its designed operating temperature.

6. A high vapor level cutoff thermostat control device that automatically shuts off the sump heater 

when if the solvent vapor level in the vapor cleaning machine rises above the designed operating 

level height of the primary condenser. 

7. For degreasers solvent cleaning machines with solvent flow, a device such as a spray pump 

control switch device that prevents the solvent flow pump operation unless the solvent vapor level 

is at the designed operating level.
STAFF REPORT - Rule 321 Page F-22

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 22 September 18, 1997[date of amended rule adoption]

8. A device that automatically shuts off the sump heat if the sump liquid solvent level drops to the 

sump heater coils. 

89. A Dimensions such that the freeboard ratio of is 0.75 or greater that is physically verifiable.

Effective [one year from the date of revised rule adoption], the unit shall have dimensions such 

that the freeboard ratio is 1.0 or greater.

910. In lieu of the freeboard ratio required by Rule 321 Section L.89, one of the following shall may be 

met:

a. A refrigerated freeboard chiller freeboard refrigeration device for which the chilled air 

blanket temperature (expressed in degrees Fahrenheit) at the coldest point on the vertical 

axis in the center of the air-vapor interface air blanket shall be no greater than 30 percent 

of the initial boiling point (expressed in degrees Fahrenheit) of the solvent used or no 

greater than 40 degrees Fahrenheit. If the chiller operates below 32 degrees Fahrenheit, it 

shall be equipped with an automatic defrost; or

b. An emission control system that meets the requirements of Rule 321 Section M N shall 

be used. 

 

11. Effective [one year from the date of revised rule adoption], except when an emission control 

system that meets the requirements of Section N is employed, when using solvent containing in 

excess of 50 grams of reactive organic compound per liter of material:

a. A circumferential trough;

b. A water separator (not required for solvents that form azeotropes with water);

c. A freeboard refrigeration device that is operated such that the chilled air blanket 

temperature, measured at the center of the air blanket, is no greater than 40 percent of the 

initial boiling point of the solvent, in degrees Fahrenheit, for solvents that do not form 

azeotropes with water, or 50 percent of the initial boiling point, in degrees Fahrenheit, for 

solvents that form azeotropes with water; and

d. A superheated vapor zone where parts remain in the vapor zone for at least the minimum 

dwell time, as specified by the manufacturer. The temperature within the superheated 

vapor zone shall be at least 10 degrees Fahrenheit above the initial boiling point of the 

solvent being used. [Link to Note No. 56]

M. Requirements - Solvent Cleaning. [Link to Note No. 57]

Section M requirements apply to any person performing solvent cleaning, including, but not limited to, use 

of wipe cleaning cloths, cotton swabs, dabber bottles, hand-held spray bottles, squirt bottles, aerosol 

products, and the cleaning of application equipment. The following requirements become effective [one 

year from the date of revised rule adoption] and are in addition to the general operating requirements 

specified in Section D.

1. Solvent Requirements. Except when using an emission control system that meets the 

requirements of Section N, no person shall use any solvent to perform solvent cleaning which 

exceeds the applicable grams of reactive organic compound per liter of material limit specified in 

Table 1. 
STAFF REPORT - Rule 321 Page F-23

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 23 September 18, 1997[date of amended rule adoption]

Table 1: Reactive Organic Compound Content Limits for Solvent Cleaning

SOLVENT CLEANING ACTIVITY

ROC Limit, 

grams of ROC per liter of 

material 

(pounds of ROC per gallona)

(a) Product Cleaning During Manufacturing Processes and Surface Preparation for Coating 

Application:

 (i) General 50

(0.42)

(ii) Electrical Apparatus Components & Electronic 

Components

900

(7.51)

(iii) Medical Devices & Pharmaceuticals

900

(7.51)

(iv) Silicone Manufacturing 900

(7.51)

(b) Repair Cleaning and Maintenance Cleaning:

 (i) General 50

(0.42)

(ii) Electrical Apparatus Components & Electronic 

Components

900

(7.51)

(iii) Medical Devices & Pharmaceuticals:

(I) Tools, Equipment, & Machinery 900

(7.51)

(II) General Work Surfaces 900

(7.51)

(iv) Silicone Manufacturing 900

(7.51)

(c) Cleaning of Coatings Application Equipment 950

(7.93)

(d) Cleaning of the Following Items and Equipment and their 

Components:

 (i) Aerospace Vehicles; 

(ii) Aerospace Vehicle Payloads and Satellites; 

(iii) Aerospace Vehicle, Aerospace Vehicle Payload, and 

Satellite: 

(I) Transport Equipment (e.g., railcars, trucks,

trailers, forklifts, and containers), and 

(II) Support Processing Equipment (e.g., clean rooms, 

tools, payload fairing fixtures, alignment jigs, fuel 

and oxidizer loading carts and associated transfer 

lines).

900

(7.51)

 

a English units are provided for information only.

[Link to Note 

No. 58]

[Link to Note 

No. 60]

[Link to Note 

No. 59]

[Link to Note 

No. 58]

[Link to Note 

No. 59]

[Link to Note 

No. 60]

[Link to Note 

No. 59]

[Link to Note 

No. 61]
STAFF REPORT - Rule 321 Page F-24

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 24 September 18, 1997[date of amended rule adoption]

2. Cleaning Devices and Methods. Except for solvent cleaning of spray application equipment, any

person performing solvent cleaning with a solvent containing more than 50 grams per liter of 

material shall use one or more of the following cleaning devices or methods: [Link to Note No. 

62]

a. Wipe cleaning where solvent is dispensed to wipe cleaning materials from containers that 

are kept closed to prevent evaporation, except while dispensing solvent or replenishing 

the solvent supply; 

b. Application of solvent from hand-held spray bottles, squirt bottles, or other closed 

containers with a capacity of one liter or less; or

c. Non-atomized solvent flow, dip, or flush method where pooling on surfaces being 

cleaned is prevented or drained, and all solvent runoff is collected in a manner that 

enables solvent recovery or disposal. The collection system shall be kept closed to 

prevent evaporation except while collecting solvent runoff or emptying the collection 

system.

3. Solvent Cleaning of Spray Application Equipment. Any person cleaning spray application 

equipment with a solvent containing more than 50 grams of reactive organic compound per liter of 

material shall use an enclosed system, or equipment that is proven to the satisfaction of the 

Control Officer to be equally effective as an enclosed system at controlling emissions. If an 

enclosed system is used, it shall totally enclose spray guns, cups, nozzles, bowls, and other parts 

during washing, rinsing and draining procedures, and it shall be used according to the 

manufacturer‟s recommendations and be closed when not in use. [Link to Note No. 63]

MN. Emission Control System Requirements. Any person who owns, operates, or uses any emission control 

system required by owning or operating a solvent cleaner subject to this rule may use Sections D.9, G.8, or 

T.2.b.4) an emission control system or as an alternative compliance method as provided for in this rule to 

Rule 321 Sections D.9, G.8, H.6.b, I.5.b, J.8, K.5, or L.9.b, provided thatshall ensure that the following 

requirements are met: [Link to Note No. 64]

1. The overall efficiency (the capture system efficiency multiplied by the emission control device 

efficiency) of the total system shall not be less than 85 percent by weight in reducing total reactive 

organic compound and toxic air contaminant emissions. [Link to Note No. 65]

2. When using a carbon adsorption adsorber, the system exhaust shall be no more than 25 parts per 

million of solvent reactive organic compound by volume, calculated as carbon, over a complete 

adsorption cycle, 

3. The emission collection system shall have a ventilation rate between 15 to 20 cubic meters per 

minute per square meter of air-vapor or air-solvent solvent/air interface area (49.2 to 65.6 cubic 

feet per minute per square feet of air-vapor or air-solvent solvent air interface surface area), unless 

otherwise required to meet a National Institute for Occupational Safety and Health standard.

4. An application for installation of the emission control equipment is submitted and the Control 

Officer grants an Authority to Construct for the equipment.

5. An initial source test is accomplished by [one year from the date of revised rule adoption] or a 

later deadline established in an Authority to Construct to demonstrate compliance with the overall 

efficiency of the total system and/or the 25 parts per million reactive organic compound by 

volume limits of this rule. [Link to Note No. 66]

6. Compliance through the use of an emission control system will not result in reactive organic 

compound emissions in excess of the reactive organic compound emissions which would result 

from compliance with Sections H.7, I.7, K.6, or M.1. [Link to Note No. 67]
STAFF REPORT - Rule 321 Page F-25

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 25 September 18, 1997[date of amended rule adoption]

O. Alternative Operating and Equipment Requirements for an Airless Solvent Cleaning Machine or an 

Air-Tight Solvent Cleaning Machine. In lieu of meeting the requirements of Sections E through L, any 

person may use an airless solvent cleaning machine or air-tight solvent cleaning machine provided all of 

the following requirements are met: [Link to Note No. 68]

1. The equipment is operated in accordance with the manufacturer‟s specifications and operated with 

a door or other pressure sealing apparatus that is in place during all cleaning and drying cycles.

2. No pressure relief device shall allow liquid solvent to drain out. 

3. A differential pressure gauge shall be installed to indicate the sealed chamber pressure.

4. A list of operating requirements shall be legible and conspicuously posted or maintained on or 

near the equipment in such a manner that it is conveniently available to the operator for reference 

purposes.

NP. Test Methods.

Any person who owns, operates, or uses any solvent cleaning machine or performs any solvent cleaning 

shall comply with the following test methods:

1. The reactive organic compound content of solvents shall be measured by the Environmental 

Protection Agency Reference Method 24 (40 CFR, Part 60, Appendix A-7). 

2. The initial boiling point of solvents shall be determined by ASTM D- 1078-8605, “Standard Test 

Method for Distillation Range of Volatile Organic Liquids.,” ASTM International.

3. The capture system efficiency shall be determined in accordance with the Environmental 

Protection Agency method described in 40 CFR, §52.741(a)(4)(iii) when the emission control 

system is used for reducing emissions of reactive organic compounds. For emission control 

systems handling compounds that are toxic air contaminants but not reactive organic compounds, 

the capture system efficiency shall be determined by using the same aforementioned method 

modified in a manner approved by the Control Officer to quantify the mass of liquid or gaseous 

reactive organic compounds and/or toxic air contaminants. 

4. The emission control device efficiency shall be determined pursuant to the Environmental 

Protection Agency method described in 40 CFR, §52.741(a)(4)(iv). and 40 CFR, 

§52.741(a)(4)(vi), when the emission control system is used for reducing emissions of reactive 

organic compounds. For emission control systems handling any compound that is a toxic air 

contaminant but not a reactive organic compound, the emission control device efficiency shall be 

determined using: 

a. an Environmental Protection Agency approved test method or methods, or

b. in the case where there is no Environmental Protection Agency approved test method, a 

Control Officer approved detection method applicable for each target toxics specie.

c. Several Environmental Protection Agency and/or Control Officer approved test methods 

on the emission control device efficiency may need to be employed to demonstrate that 

the emission control system overall efficiency is at least 85 percent by weight in reducing 

emissions of reactive organic compounds and/or toxic air contaminants. In addition, 

techniques to convert “parts per million by volume” test method results to 1) “parts per 

million by weight” and/or 2) “mass emission rates” (e.g., pounds per hour) shall be 

approved by the Control Officer. 
STAFF REPORT - Rule 321 Page F-26

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 26 September 18, 1997[date of amended rule adoption]

5. The volumetric flowrate shall be determined in accordance with the Environmental Protection 

Agency Methods 2, 2A, 2C, and 2D, 2F, or 2G (40 CFR, Part 60, Appendix A-1). [Link to Note 

No. 69]

6. The average workroom draft rate shall be measured parallel to the plane of the degreaser solvent 

cleaning machine opening with a thermistor anemometer with an accuracy within ± 2 feet per 

minute and a calibration pursuant to the National Institute of Standards and Technology. 

7. The identity of components in solvents shall be determined using manufacturer‟s formulation data 

or by using ASTM E 168-6706, “Standard Practices for General Techniques of Infrared 

Quantitative Analysis,” ASTM International, ASTM E 169-8704, “Standard Practices for General 

Techniques of Ultraviolet-Visible Quantitative Analysis,” ASTM International, or ASTM E 260-

8596 (2006), “Standard Practice for Packed Column Gas Chromatography,” ASTM International. 

8. Emissions of ROC reactive organic compounds from the exhaust of an emission control system 

shall be measured by the appropriate EPA Environmental Protection Agency Method 18 or 25, or, 

if applicable, 25A or 25B may be used (40 CFR, Part 60, Appendix A-7), with gas 

chromatography-flame ionization detection speciation analysis for C1, C2, C3, C4, C5, C6+ 

species. Alternatively, the Environmental Protection Agency Method 25 or 25A in combination 

with Method 18 may be used.

OQ. Operational and Maintenance Plan. Any person proposing to use an emission control device to comply 

with this rule pursuant to Rule 321 Section M N shall submit, with the Authority to Construct application, 

an emission control device Operation and Maintenance Plan to the Control Officer for approval. Owners or 

operators of emission control devices installed as of July 17, 1997, if not previously submitted, shall submit 

Operation & Maintenance Plans by January 17, 1998 and obtain approval of the plan by the Control 

Officer. The Operation and Maintenance Plan shall specify:

1. operation and maintenance procedures of emissions-producing operation, and 

2. which records shall be kept to document these operation and maintenance procedures. 

3. In addition, These these records shall comply with the requirements of Rule 321 Section PR.1.c 

and P.3R.3. The Operation and Maintenance Plan shall be implemented upon approval of the 

Control Officer.

PR. Recordkeeping Requirements.

1. Any person holding a permit forwho owns, operates, or uses a solvent cleaner cleaning machine or 

performs solvent cleaning that is subject to this rule shall comply with the following requirements: 

a. Record and Mmaintain and have available on site solvent manufacturer specification 

sheets that show the following information for each solvent:

1) Type of solvent (chemical or manufacturer's product name).Brand name, stock 

identification number, and generic product class for each solvent used during the 

month at the stationary source.

2) The solvent initial boiling point.Material safety data sheets for each material 

listed in response to Section R.1.a.1).

3) Purchase records for each material listed in response to Section R.1.a.1).

b. Record each quarter the following information for the stationary source:

[Link to Note 

No. 70]
STAFF REPORT - Rule 321 Page F-27

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 27 September 18, 1997[date of amended rule adoption]

1) The total volume of make-up solvent used, itemized by each solvent's chemical 

or manufacturer's product name. If the solvent is a mix of materials blended by 

the operator, the mix ratio by each solvent's chemical or manufacturer's product 

name shall be recorded.On a monthly basis, the total monthly volume (gallons) 

usage and reactive organic compound content (grams per liter or pounds per 

gallon of reactive organic compound) for each material listed in response to 

Section R.1.a.1). 

2) The date Records confirming compliance with the acceptable disposal methods 

listed in Section D.1, each time waste solvent or waste solvent residue is 

removed from the facility stationary source for disposal.

3) For solvent cleaning, the type of cleaning activity for each solvent used at the 

stationary source in accordance with the cleaning categories specified in Table 1 

of this rule.

4) For each solvent cleaning machine:

i. Type of solvent cleaning machine.

ii. Brand name of each solvent used in the solvent cleaning machine and 

the reactive organic compound content of each solvent, as used.

iii. The solvent(s) initial boiling point.

5) When the solvent used is a mixture of different materials that are blended by the 

operator, the mix ratio of the batch shall be recorded and the reactive organic 

compound content of the batch shall be calculated and recorded in order to 

determine compliance with the specified limits of reactive organic compound 

content, as applied.

c. If using an emission control system pursuant to Rule 321 Section M N as a means of 

complying with this rule, the person shall maintain such records as required by the 

Operation and Maintenance Plan in Section O Q on a daily basis. Key operating 

parameters and other information necessary to verify compliance with the required 

overall efficiency of the total system, as specified in Section N.1, shall be recorded. 

These parameters shall include, but not be limited to:

1) Hours of operation;

2) All maintenance work that requires the emission control system to be shut down;

3) All information needed to demonstrate continuous compliance with Section N, 

such as temperatures, pressures, and/or flow rates.

2. Any person claiming an exemption from Rule 321, pursuant to Section B.2.b, shall record each 

quarter the following information for the stationary source: the aggregate evaporative surface area 

of all solvent cleaners subject to the Rule 321 Section B.2.b exemption claim. [Link to Note No. 

71]

32. In addition to the records required by Section R.1, any person claiming the Section B.9 exemption 

or the Section B.15 exemption, shall maintain records in order to demonstrate compliance with the 

solvent usage rate aggregate limits. For Section B.9 exemption claims, daily records on a facility 

basis shall be maintained. For Section B.15 exemption claims, monthly and calendar year total 

records on a stationary source basis shall be maintained.
STAFF REPORT - Rule 321 Page F-28

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 28 September 18, 1997[date of amended rule adoption]

3. Maintain the Rrecords kept pursuant to this section rule shall be maintained on site for at least 2 3 

years. Thereafter, the records shall be maintained such records either on site or readily available 

for expeditious inspection and review for an additional 3 2 years. 

QS. Reporting Requirements

Any person holding a permit for a solvent cleaner cleaning machine or solvent cleaning subject to the 

requirements of this rule shall submit an annual report to the Control District. At a minimum, Tthe annual 

report shall contain the quarterly monthly records required by Rule 321 Section PR.1.b.1), the annual totals

based on each of the solvent‟s monthly data, the name and address of the Permittee, and the Permit to 

Operate number that the solvent cleaning machine and/or solvent cleaning is subject to. The report shall be 

due March 1 for the previous calendar year.

RT. Compliance Schedule

Any person who owns, operates, or uses any solvent cleaning machine or performs any solvent cleaning 

subject to this rule shall meet the following compliance schedule:

1. New solvent cleaning machines and solvent cleaning operations:

Commencing [date of revised rule adoption], any new solvent cleaning machine shall comply with 

this rule the first time it is operated in the District. Also commencing [date of revised rule 

adoption], any new solvent cleaning shall comply with this rule the first time it is performed in the 

District. [Link to Note No. 72]

2. Existing solvent cleaning machines:

a. For any solvent cleaning machine previously subject to the Rule 321 adopted on 

September 18, 1997, commencing [date of revised rule adoption], the owner or operator 

shall ensure that the equipment complies with the applicable provisions of Rule 321. The 

provisions in Sections H.7, I.7, J.8, J.11, K.6, L.9, and L.11 have an effective date of [one 

year from the date of revised rule adoption]. [Link to Note No. 73]

b. For any solvent cleaning machine previously exempt from the September 18, 1997 

amended Rule 321 that lost its exemption by the adoption of amended Rules 102

(Definitions), 202 (Exemptions to Rule 201), and/or Rule 321 on [date of revised rule 

adoption], the owner or operator of such equipment shall comply with the following: 

[Link to Note No. 74]

1. The owner or operator of any solvent cleaning equipment in operation as of July 17, 1997 and 

subject to the requirements of this rule shall comply with the following:

a. 1) By August 16, 1997[30 days from the date of revised rule adoption], be in full 

compliance with the applicable operating requirements of Rule 321 Sections D, 

E, and F.

b. 2) By January 13, 1998[180 days from the date of revised rule adoption], be in full 

compliance with the applicable recordkeeping and reporting provisions of Rule 

321 Sections P R and QS.

c. 3) By July 17, 1998[365 days from the date of revised rule adoption], be in full 

compliance with the applicable equipment requirements of Rule 321 Sections G, 

H, I, J,. K, L, and MN.
STAFF REPORT - Rule 321 Page F-29

September 20, 2010

[Annotated draft of September 20, 2010]

Santa Barbara County APCD Rule 321 321 - 29 September 18, 1997[date of amended rule adoption]

d. 4) Notwithstanding Rule 321 Section R.1.c, the provisions of Section G.8 shall 

take effect on July 17, 1997.Any lip exhaust installed after [date of revised rule 

adoption] shall be vented to an emission control system that meets the 

requirements of Section N at the time of installation, notwithstanding the dates

in Sections G.8 and T.2.b.3. [Link to Note No. 75]

2. This rule applies to any new or modified solvent cleaning equipment on July 17, 1997.

3. Existing solvent cleaning operations: [Link to Note No. 76]

The owner or operator of any facility performing solvent cleaning as of [date of revised rule 

adoption] and subject to the requirements of this rule shall comply with the following:

a. By [30 days from the date of revised rule adoption], be in full compliance with the 

applicable operating requirements of Section D.

b. By [180 days from the date of revised rule adoption], be in full compliance with the 

applicable recordkeeping and reporting provisions of Sections R and S.

c. By [365 days from the date of revised rule adoption], be in full compliance with the 

solvent cleaning requirements of Rule Section M.
STAFF REPORT - Rule 321 Page F-30

September 20, 2010

Table of Annotations for 

Santa Barbara County APCD Rule 321 [Annotated draft of September 20, 2010]

NOTE 

No.

PROPOSED 

AMENDED 

RULE 321 

SECTION

PROPOSED AMENDED RULE (PAR) 321 NOTES LINK TO 

RETURN 

TO PAR 

321a

APPENDIX F 

PAGE NO. 

FOR THE PAR 

321 SECTION

1 Rule Title The solvent cleaning machines term is from 40 CFR, Part 63, Subpart T. The solvent cleaning term 

is modeled on the term in the San Joaquin Valley Unified APCD (SJV) Rule 4663. “Solvent 

cleaning” is generally defined as those solvent activities, operations, and processes that occur 

outside of a solvent cleaning machine (SCM). 

Click here. Page F-1

2 A. The District used the SJV Rule 4663 “Applicability” provision as a model for this section. Click here. Page F-1

3 B.1 The revised 321.B.1 text will make the use of a solvent containing two percent or less of the 

following materials exempt from the rule (except for the recordkeeping provisions):

1. reactive organic compounds and

2. toxic air contaminants.

If either one is exceeded, then the exemption will not apply. The recordkeeping provisions are 

added to facilitate verification of exemption claims.

If a solvent cleaning machine is using a hazardous air pollutant and is subject to the 40CFR Part 63 

Subpart T requirements, the equipment will be exempt by Section B.5 (providing the equipment 

complies with the applicable federal requirements). 

Click here. Page F-1

4 Deleted B.2 To make the new/revised requirements applicable for solvent cleaning, small cold cleaning 

machines, and remote reservoir cleaning machines, the one gallon capacity and one square foot 

surface area exemptions need to be deleted. For additional information on this deletion, see the 

discussion in Appendix E, Page 1, under the 321.B exemptions, item 2. Click here to go to that 

section.

Click here. Page F-1

5 Deleted B.3 and 

Revised B.2 

The District is proposing to delete the existing B.3 text because it is unnecessary. The proposed 

amended Rule (PAR) 321 Section J.9 provision indicates that the requirements only apply to units 

with a surface area of 10.8 square feet or greater. The new text adds an architectural coating 

application equipment exemption. This exemption is necessary to standby itself (i.e., not be 

included with the B.6 provision) because Rule 323 does not currently have any requirements or 

exemptions on the cleaning of application equipment. 

The owners/operators that apply architectural coatings should easily comply with the 950 grams of 

ROC per liter limit. Thus, the requirement does not warrant recordkeeping provisions for 

compliance verification. The District modeled this exemption on the South Coast AQMD (SC) Rule 

1171, Section (h)(2)(H), as adopted May 6, 2005.

Click here. Page F-1

 

a When using a computer to view this material, you may return to the PAR 321 text by clicking the “here” link in the table using the left mouse button.
STAFF REPORT - Rule 321 Page F-31

September 20, 2010

Table of Annotations for 

Santa Barbara County APCD Rule 321 [Annotated draft of September 20, 2010]

NOTE 

No.

PROPOSED 

AMENDED 

RULE 321 

SECTION

PROPOSED AMENDED RULE (PAR) 321 NOTES LINK TO 

RETURN 

TO PAR 

321a

APPENDIX F 

PAGE NO. 

FOR THE PAR 

321 SECTION

6 Deleted B.4.a The deletion of the wipe cleaning exemption is necessary for consistency with the new PAR 321 

solvent cleaning provisions.

Click here. Page F-1

7 B.3 The District updated the name of the ATCM. Click here. Pages F-1 and 

F-2

8 B.4 This revised text is modeled on the exemption in the SJV Rule 4663.4.2. Click here. Page F-2

9 Deleted B.4.d The deletion of the spray gun cleaning exemption is necessary for consistency with the PAR 321. Click here. Page F-2

10 B.5 The District is proposing that the definition of solvent include any liquid containing any ROC or 

toxic air contaminant (TAC). All HAP solvents are TACs. The addition of the “notwithstanding 

Section B.1” text in Rule 321.B.5 is to prevail over the Section B.1 exemption. Thus, a SCM 

subject to and complying with 40 CFR, Part 63, Subpart T, is exempt irrespective that the unit uses a 

cleaning agent that contains more than 2 percent solvent that is a TAC.

Click here. Page F-2

11 B.5 The listing of the chemicals in this section is no longer necessary with the addition of the 

halogenated hazardous air pollutant solvent definition in Rule 321.

Click here. Page F-2

12 Deleted B.4.f The PAR 321 has provisions that apply to these types of units (e.g., Section O requirements for 

airless and air-tight solvent cleaning machines). Thus, the District needs to eliminate this 

exemption.

Click here. Page F-2

13 B.6 Exempting the solvent cleaning operations that are subject to other rules from Rule 321 is consistent 

with the approach of putting the solvent cleaning requirements into each of the operation- or 

equipment-specific rules. The SJV and VC solvent cleaning rules have similar exemptions.

Click here. Page F-2

14 B.7 This exemption is the same one found in SJV Rule 4663 Section 4.1 and VC Rule 74.6 Section 

E.1.c.

Click here. Page F-2

15 B.8 The District modeled this exemption on provisions in the SJV Rule 4663 Sections 4.5.1 and 4.5.2, 

the SC Rule 1171 Section (g)(3), and VC Rule 74.6 Sections E.2.c and d.

Click here. Page F-3

16 B.8 The PAR 321.B.8.d provision stems from various exemptions in the SC Rule 1122 and the SJV 

Rule 4662, the SBCAPCD responses to concerns from the regulated community, and the limits for 

like categories in the Section M.1, Table 1. For cleaning the specified products, PAR 321.B.8.d 

creates the same ROC-content limits found in Section M.1, Table 1. Hence, there should be no need 

for source to switch from using a SCM to performing solvent cleaning to be eligible to use solvents 

with higher ROC-content limits.

Click here. Page F-3

17 B.9 Exemption B.9 is similar to the one found in SC Rule 1171(g)(4) and SJV Rule 4663.4.8. The 

District added the recordkeeping provision to facilitate determinations of exemption applicability. 

Also, in place of the reference to “CARB regulations” (as found in other air district rules) staff cited 

the consumer product provisions (California Code of Regulations, Title 17, Section 94507 et seq.) to 

be more specific on the requirement.

Click here. Page F-3

18 B.10 The District modeled this exemption on the SC Rule 1171 Section (h)(6)(B) as adopted on October 

8, 1999 and SJV Rule 4663 Section 4.6 provisions.

Click here. Page F-3
STAFF REPORT - Rule 321 Page F-32

September 20, 2010

Table of Annotations for 

Santa Barbara County APCD Rule 321 [Annotated draft of September 20, 2010]

NOTE 

No.

PROPOSED 

AMENDED 

RULE 321 

SECTION

PROPOSED AMENDED RULE (PAR) 321 NOTES LINK TO 

RETURN 

TO PAR 

321a

APPENDIX F 

PAGE NO. 

FOR THE PAR 

321 SECTION

19 B.11 The proposed new Section B.11.a and b exemptions are similar to the SC Rule 1171 Section 

(g)(11)(A) and (B) provisions. Staff added the Section B.11.c exemption because gas-path cleaners 

inject solvent into gas turbines or jet engines under pressure and there is likely atomization 

occurring during the process.

Click here. Page F-3

20 B.12 With the addition of the term moisture to the solvent cleaning definition, tarmac de-icing operations 

become a subset of solvent cleaning. No air districts require control techniques for aircraft de-icing. 

A feasibility study on controlling de-icing operations has not been performed. Thus, the District

prefers not to apply Rule 321 provisions to such operations at this time and is adding this 

exemption.

Click here. Page F-3

21 B.13 This exemption is similar to an exemption provided in the SJV Rule 4663 Section 5.1.6 (adopted 

December 20, 2001). The SJV staff added this exemption in response to an industry concern about 

prohibiting the use of “Hudson” type sprayers, which are hand-pump pressurized containers with 

atomizing spray nozzles.

Click here. Page F-3

22 B.14 The District is adding this exemption to clarify that the Rule 321 solvent cleaning requirements do 

not apply to such sources.

Click here. Pages F-3 and 

F-4

23 B.15 This exemption is similar to the one found in the SJV Rule 4663 Section 4.4. Click here. Page F-4

24 B.16.a - f Exemptions B.16.a - f stem from similar provisions found in the SC Rule 1171(g) and the VC Rule 

74.6.E.2.

Click here. Page F-4

25 B.16.g The District added this exemption to allow offshore platform operators to use mineral spirits to 

remove crude oil residues. Limiting the solvent‟s composite partial pressure to 8 mm of Hg at 20 

degrees Celsius or less is consistent with the U.S.EPA guidance in the document titled, “Control 

Techniques Guidelines: Industrial Cleaning Solvents,” September 2006 (EPA-HQ-OAR-2006-

0535). Mineral spirits meet the composite partial pressure limit and the 800 grams per liter ROC 

content limit.

Click here. Page F-4

26 B.17 These exemptions are similar to the VC Rule 74.6, Section E.2.m and n exemptions. Click here. Page F-4

27 B.18 This exemption is similar to the VC Rule 74.6.1, Section G.3 exemption. Click here. Page F-4

28 B.19 The District modeled this exemption on the VC Rule 74.6.E.1.h text. Click here. Page F-4
STAFF REPORT - Rule 321 Page F-33

September 20, 2010

Table of Annotations for 

Santa Barbara County APCD Rule 321 [Annotated draft of September 20, 2010]

NOTE 

No.

PROPOSED 

AMENDED 

RULE 321 

SECTION

PROPOSED AMENDED RULE (PAR) 321 NOTES LINK TO 

RETURN 

TO PAR 

321a

APPENDIX F 

PAGE NO. 

FOR THE PAR 

321 SECTION

29 B.20 This is a limited exemption from several new vapor cleaning machine requirements. Equipment 

subject to this exemption will not be required to have an automated parts handling system, an 

enhanced freeboard refrigeration device, a superheated vapor zone, or a freeboard ratio of 1.0. 

The District is proposing this exemption to provide relief for several existing uncontrolled vapor 

cleaners used by Raytheon to clean electronic components. Raytheon indicates it has explored using 

other equipment (e.g., airless and air-tight systems) but has not been able to find suitable 

replacements. The SC Rule 1122 (E) provides a narrow and unique exemption for specific parts 

cleaning operations, which is similar to the approach the District is taking.

The proposed maximum ROC limit of 188 pounds per month per stationary source is based on data 

provided by Raytheon and may not represent the equipment‟s maximum potential to emit. The 

District is proposing the qualifying provisions of this exemption, including the pounds per month 

per stationary source limit, as a means to develop an exemption that will be acceptable to Raytheon,

the District, ARB, and U.S.EPA.

Click here. Page F-5

30 B.21 This is an exemption that is unique to SBC. The District is aware that medical device manufacturers 

sometime leak-test devices using a solvent bath. This limited exemption would allow the practice to 

continue without subjecting the solvent wash stations to the rule‟s minimum freeboard height and/or 

free ratio requirements, or alternative compliance methods (water cover or emission control system). 

Click here. Page F-5

31 B.22 The District is adding this exemption to clarify that metal lift-off operations and the other 

specifically listed operations are not subject to the Rule 321 requirements. (These wipe cleaning 

operations are currently exempt from Rule 321.) Members of the regulated community indicated 

that they need to use n-methyl-2-pyrrolidone (NMP) for these specific operations. Further, that they 

have searched for but have not been able to find suitable replacement solvents that meet their

cleanliness demands. Although NMP has a high-ROC content (1,027 g/l) it has an extremely low 

composite partial pressure (0.29 mm Hg at 20 °C), which tends to reduce the evaporation rate and 

emissions. 

Click here. Page F-5

32 B.23 This exemption stems from a request from a manufacturer. The company has a small sump that the 

operator lifts out of the SCM and empties by pouring the solvent directly into the bulk container. 

The District agreed that for the small volume of solvent transferred (about 2 - 3 gallons) an 

alternative method involving siphoning solvent would not likely achieve a significantly lower 

emission rate. Thus, the District is adding this exemption. 

Click here. Page F-5

33 B.24 The District is providing this specific exemption in response to a request from Raytheon for a 

limited waiver from the requirement to have a freeboard ratio of 1.0.

Click here. Page F-5
STAFF REPORT - Rule 321 Page F-34

September 20, 2010

Table of Annotations for 

Santa Barbara County APCD Rule 321 [Annotated draft of September 20, 2010]

NOTE 

No.

PROPOSED 

AMENDED 

RULE 321 

SECTION

PROPOSED AMENDED RULE (PAR) 321 NOTES LINK TO 

RETURN 

TO PAR 

321a

APPENDIX F 

PAGE NO. 

FOR THE PAR 

321 SECTION

34 C (Section Title: 

Definitions)

In general, the solvent cleaning machine terms used herein have the same meaning as those found in 

40 CFR, Part 63, Subpart T - National Emission Standards for Halogenated Solvent Cleaning (40 

CFR §63.460 et seq.). The basis for using the definitions from the federal statute is that:

1. It is the most global regulatory document available relative to solvent cleaning machine 

requirements, and 

2. U.S.EPA and manufacturers worked together to develop the terms, and

3. They are available on the Internet (http://www.gpoaccess.gov/cfr/retrieve.html, under Title 

“40,” CFR “63,” Section “461”). 

The District modeled the solvent cleaning terms and definitions on those used by other air districts.

Click here. Page F-5

35 C (Airless and 

Air-Tight SCM 

Definition)

These definitions are the same ones found in SJV Rule 4662. PAR 321, Section O, provides an 

alternative compliance method to Sections E through L involving the use of either an airless or airtight solvent cleaning machine.

Click here. Page F-5

36 C (Deleted 

Control Device 

Definition)

The District changed the term to emission control device and relocated it so that it would be in 

alphabetical order. The PAR 321 uses the 40 CFR, Part 63, Subpart T, control device term when 

describing a vapor level control device. PAR 321 also uses the term control device when 

establishing requirements for the emission controls. Thus, it is necessary to differentiate between 

these two uses of the term control device.

Click here. Page F-7

37 C (Conveyorized 

[In-Line or 

Continuous] 

Cleaning 

Machine 

Definition)

40 CFR, Part 63, Subpart T, provisions do not use the term conveyorized. For congruency with the 

SC and SJV degreasing rules, the conveyorized term is being retained. The addition of web is 

provided for consistency with the continuous web cleaning machine definition. The terms gyro and 

cross-rod cleaning machines are being deleted because these are loaded manually or semicontinuously, which makes them batch cleaning machines.

Click here. Page F-7

38 C (Deleted 

Degreaser 

Definition)

The District is revising the degreaser definitions to be consistent with 40 CFR, Part 63, Subpart T, 

wherever possible. The federal regulation does not define degreaser and does not use the term.a 

Instead, 40 CFR, Part 63, Subpart T, uses solvent cleaning machine. Therefore, staff replaced the 

term degreaser with solvent cleaning machine throughout Rule 321 and deleted the definition of 

degreaser from Section C. Rule 102 includes a definition of degreaser to clarify that degreaser has 

the same meaning as solvent cleaning machine.

Click here. Page F-7

39 C (Electronic 

Components 

Definition)

The District deviated from similar definitions found in the SC, SJV, and VC rules. The proposed 

definition is intended to be more descriptive and incorporates semiconductor terms. The District is 

not planning to have a separate semiconductor manufacturing rule as is done in SC and VC. 

Click here. Page F-8

 

a There is one exception. The 40 CFR, Part 63, Subpart T, Section 63.461 uses the term degreaser in the definition of batch cleaning machine.
STAFF REPORT - Rule 321 Page F-35

September 20, 2010

Table of Annotations for 

Santa Barbara County APCD Rule 321 [Annotated draft of September 20, 2010]

NOTE 

No.

PROPOSED 

AMENDED 

RULE 321 

SECTION

PROPOSED AMENDED RULE (PAR) 321 NOTES LINK TO 

RETURN 

TO PAR 

321a

APPENDIX F 

PAGE NO. 

FOR THE PAR 

321 SECTION

40 C (Deleted 

Evaporative 

Surface Area 

Definition)

Evaporative surface area has been replaced by the 40 CFR, Part 63, Subpart T, solvent/air interface 

area term.

Click here. Page F-8

41 C (Gas-Path 

Solvent Cleaner 

Definition)

Staff used the San Diego County APCD (SD) Rule 67.6(c)(8) “gas-path cleaning machine” as a 

model for the proposed revised definition. For rule clarity, staff recommends that the current 

“liquid-path” portion of the term be deleted. The PAR 321, Section M.2.c, includes solvent flow and 

solvent flush methods as acceptable cleaning techniques for solvent cleaning. Without the deletion 

of “liquid-path” there could be confusion between the solvent cleaning and gas/liquid-path solvent 

cleaner requirements. Thus, the “liquid-path” description is removed from the term and the 

proposed amended Section F operating requirements apply only to gas-path solvent cleaners.

Click here. Page F-9

42 C (High 

Volatility 

Solvent 

Definition)

A high volatility solvent includes any solvent with an initial boiling point (IBP):

1. ≤ 248 oF or

2. > 248 oF, but the in-use temperature is not ≤ 212 oF below the solvent‟s IBP.

The Rule 202.U.2.b uses a solvent IBP temperature exemption applicability threshold of 302 oF or 

greater. For a remote reservoir SCM employing turpentine (IBP = 302 oF) used in an environment 

without air conditioning, the ambient and in-use temperature could be expected to reach 90 oF or 

greater. Such a unit would be exempt from permit, but would need to comply with the Rule 321 

Section H.5 0.75 freeboard ratio requirement because the solvent would be classified as a high 

volatility solvent. 

Click here. Page F-10

43 C (In-Line 

Cleaning 

Machine or 

Continuous 

Cleaning 

Machine 

Definition)

The revised definition is from 40 CFR, Part 63, Subpart T. A mechanized solvent cleaning machine 

is an in-line or continuous cleaning machine only if it uses an automated parts handling system to 

provide a continuous supply of parts. If a cleaner is loaded manually or semi-continuously, it is not 

an in-line cleaning machine or a continuous solvent cleaning machine. Gyro (Ferris wheel) and 

cross rod cleaning machines are not in-line or continuous cleaning machines because the parts being 

cleaned are loaded manually or semi-continuously.

Click here. Page F-9

44 C (Low 

Volatility 

Solvent 

Definition)

The definition stems from the ARB RACT/BARCT document. However, the District discovered 

that the definition had an error (100 degrees Celsius equals 212 degrees Fahrenheit, not 180 degrees 

Fahrenheit). Thus, the revised definition takes into account the correct Fahrenheit temperature for 

deeming a solvent a low volatility solvent.

Click here. Page F-10
STAFF REPORT - Rule 321 Page F-36

September 20, 2010

Table of Annotations for 

Santa Barbara County APCD Rule 321 [Annotated draft of September 20, 2010]

NOTE 

No.

PROPOSED 

AMENDED 

RULE 321 

SECTION

PROPOSED AMENDED RULE (PAR) 321 NOTES LINK TO 

RETURN 

TO PAR 

321a

APPENDIX F 

PAGE NO. 

FOR THE PAR 

321 SECTION

45 C (Solvent 

Definition)

The revised definition includes “any toxic air contaminant” text, which is unique compared to other 

air district solvent definitions. The reasons that the District is including toxic air contaminants 

(TACs) in this project are discussed in Appendix I, Page I-16, (see “Definition of „Solvent‟ 

Including Toxic Air Contaminants (TACs)”). Click here to go to the Appendix I, Page I-16, 

discussion.

Click here. Page F-12

46 C (Solvent/Air 

Interface and 

Solvent/Air 

Interface Area 

Definitions)

These definitions are generally consistent with the definitions found in 40 CFR, Part 63, Subpart T. 

Solvent/air interface replaces the current air-solvent interface and air-vapor interface terms. The 

solvent/air interface term appears in the definitions of freeboard area and freeboard height. 

Solvent/air interface area replaces the current evaporative surface area term. The solvent/air 

interface area term appears in various Rule 321 operation and equipment requirements. 

The District added the text on the area being the drain area for remote reservoir cleaners at the 

request of the regulated community and for consistency with the earlier evaporative surface area

definition.

Click here. Page F-12

47 C (Solvent 

Cleaning & 

Solvent Cleaning 

Machine 

Definitions)

The solvent cleaning and solvent cleaning machine definitions appear in Rules 102 and 321. Rules 

102 and 321 have different solvent definitions. The Rule 102 definition indicates it has the same 

meaning as organic solvent. Whereas the Rule 321 solvent definition includes a TAC aspect and 

does not use the material‟s boiling point to determine if it is a solvent.

Click here. Page F-12

and Page F13

48 D In general, the District added “owns, operates, or uses” to sections on applicability and rule 

requirements to improve rule clarity. This terminology is being added in numerous places 

throughout the revised rule. For the sake of brevity, the notes in this annotated draft PAR 321 will 

not re-iterate the addition of the “owns, operates, or uses” text.

Click here. Page F-14

49 D.10 – D.12 Requirements in PAR321.D.10 and 11 are similar to those found in 40 CFR, Part 63, Subpart T, and 

SC Rule 1122. The intent is to ensure that good housekeeping procedures are followed. The 

Section D.12 provision is modeled on language from SC Rule 1122(c)(1)(E).

Click here. Page F-15

50 D.13 The District moved this provision from Rule 321, Section G.10. A similar provision is found in the 

SC Rule 1122, Section (c)(1)(K), Work Practice Requirements.

Click here. Page F-15

51 H.7 Limiting the solvent‟s ROC content will likely affect the type of solvent used in remote reservoir 

cleaners (e.g., Safety Kleen units) in shops such as automobile repair shops. Limiting remote 

reservoir cleaner solvent ROC content is consistent with the approach taken by SJV, SC, and VC. 

The 50 grams of ROC per liter limit is based on the limit specified in the SC Rule 1122, adopted 

July 11, 1997.

Click here. Page F-18
STAFF REPORT - Rule 321 Page F-37

September 20, 2010

Table of Annotations for 

Santa Barbara County APCD Rule 321 [Annotated draft of September 20, 2010]

NOTE 

No.

PROPOSED 

AMENDED 

RULE 321 

SECTION

PROPOSED AMENDED RULE (PAR) 321 NOTES LINK TO 

RETURN 

TO PAR 

321a

APPENDIX F 

PAGE NO. 

FOR THE PAR 

321 SECTION

52 I If a remote reservoir cold cleaning machine has an enclosed container that is accessible for dipping 

or soaking parts, such machine is subject to the provisions in Section I. (See the definition of 

“Remote Reservoir Cleaning Machine,” page F-11, or click here, for the text on remote reservoir 

cold cleaners that are designed to allow dip or soak cleaning are considered to be batch cold 

cleaning machines.)

Click here. Page F-18

53 I.7 The 50 grams of ROC per liter limit is based on the limit specified in the SC Rule 1122, adopted 

July 11, 1997.

Click here. Page F-19

54 J.11 The District modeled the Section J.11 requirements on provisions in:

1. The SJV Rule 4662, Sections 5.4.10.7 - 5.4.10.12; and 

2. The SC Rule 1122, Section (e)(1)(B).

Click here. Page F-20

55 K.6 The 50 grams of ROC per liter limit is based on the limit specified in the SC Rule 1122, adopted 

July 11, 1997.

Click here. Page F-21

56 L.11 The District modeled the Section L.11 requirements on provisions in:

1. The SJV Rule 4662, Sections 5.5.7.7 - 5.5.7.12; and 

2. The SC Rule 1122, Section (e)(2)(C).

Click here. Page F-22

57 M In general, the proposed new Section M provisions are modeled on requirements in the SC Rule 

1171, Solvent Cleaning Operations; the SJV Rule 4663, Organic Solvent Cleaning, Storage, and 

Disposal; and the VC Rule 74.6.

Click here. Page F-22

58 M.1, Table 1, 

Category (a)(i) & 

Category (b)(i)

These limits are based on those limits in the SJV Rule 4663 (effective November 15, 2003) Click here. Page F-23

59 M.1, Table 1, 

Categories 

(a)(ii), (a)(iii), 

(b)(ii), (b)(iii), 

and (c)

The District based these limits on the limits in the SJV Rule 4663 (effective November 15, 2002 

through November 14, 2003).

Click here. Page F-23

60 M.1, Table 1, 

Categories 

(a)(iv) and 

(b)(iv)

The silicone manufacturing limits were added in response to comments by a member of the 

regulated community.

Click here. Page F-23

61 M.1, Table 1, 

Category (d)

The District based the limit on comments from the regulated community and the Vandenberg Air 

Force Base practice of using IPA for cleaning fuel transfer lines.

Click here. Page F-23

62 M.2 These provisions on cleaning devices and methods are similar to requirements found in SC Rule 

1171, Section (c)(2); SJV Rule 4663, Section 5.2.5; and VC Rule 74.6, Section B.2.

Click here. Page F-24
STAFF REPORT - Rule 321 Page F-38

September 20, 2010

Table of Annotations for 

Santa Barbara County APCD Rule 321 [Annotated draft of September 20, 2010]

NOTE 

No.

PROPOSED 

AMENDED 

RULE 321 

SECTION

PROPOSED AMENDED RULE (PAR) 321 NOTES LINK TO 

RETURN 

TO PAR 

321a

APPENDIX F 

PAGE NO. 

FOR THE PAR 

321 SECTION

63 M.3 The proposed new 321.M.3 provisions are modeled on the provisions in SJV Rule 4663, Section 

5.2.7. The Section M, Table 1 category (c) allows the solvent used for cleaning application 

equipment to have an ROC content up to 950 grams per liter. However, under the Section M.3 

provision, an enclosed system (or other APCO-approved equipment) is needed if the solvent‟s ROC 

content exceeds 50 grams per liter. 

Click here. Page F-24

64 N Section D.9 (solvent atomization), Section G.8 (lip exhausts installed after July 17, 1997), and 

proposed amended Rule 321 Section T.2.b.4) (lip exhausts installed on previously exempt SCMs 

after the rule adoption date) require the use of an emission control system that complies with 

Section N. 

Many other sections allow the use of an emission control system that complies with Section N as an 

alternative compliance method. Instead of listing those rule sections in the rule, the District elected 

to simply indicate or as an alternative compliance method as provided for in this rule. 

The PAR 321 Sections that provide for use of an emission control system as an alternative 

compliance method include: H.7, I.7, J.11, K.6, L.11, and M.1

Click here. Page F-24

65 N.1 The District added and toxic air contaminant emissions to Section N.1 to cover cases where a source 

is using a liquid containing a toxic air contaminant and wants to use an emission control system as 

an alternative compliance method.

Click here. Page F-24

66 N.5 The new Section N.5 provision on a deadline for completing an initial source test is being added to 

ensure that sources complete such a test in a timely manner

Click here. Page F-24

67 N.6 This requirement is similar to the provision found in SJV Rule 4663, Section 5.5.5. It is an 

overarching provision that prohibits use of an emission control system unless the ROC emission rate 

from such system is equal to or less than the emissions otherwise expected with the use of a 

complying solvent. The provision prevents a source from using a large quantity of high-ROC 

content solvent with an emission control system unless the control system‟s overall efficiency is 

such that it achieves a lower emission rate than the one that would have been achieved through use 

of a complying solvent. Theoretically, this provision may require that a system‟s overall control 

efficiency be above the 85% requirement in Section N.1 to comply with Section N.6.

Click here. Page F-24

68 O The SC Rule 1122 and SJV Rule 4662 allow use of air-tight cleaning systems and airless cleaning 

systems. These systems are state-of-the-art machines that have low emissions.

Click here. Page F-25
STAFF REPORT - Rule 321 Page F-39

September 20, 2010

Table of Annotations for 

Santa Barbara County APCD Rule 321 [Annotated draft of September 20, 2010]

NOTE 

No.

PROPOSED 

AMENDED 

RULE 321 

SECTION

PROPOSED AMENDED RULE (PAR) 321 NOTES LINK TO 

RETURN 

TO PAR 

321a

APPENDIX F 

PAGE NO. 

FOR THE PAR 

321 SECTION

69 P.5 To provide additional options, the District recommends the addition of these two test methods:

1. U.S.EPA Test Appendix A-1, Method 2F, Determination of Stack Gas Velocity and 

Volumetric Flow Rate with Three-Dimensional Probes, and

2. U.S.EPA Test Appendix A-2, Method 2G, Determination of Stack Gas Velocity and 

Volumetric Flow Rate with Two-Dimensional Probes.

Click here. Page F-26

70 Q The deleted text should no longer be necessary as sources should have already obtained the APCO 

approval for their Operation and Maintenance Plans. 

Click here. Page F-26

71 Deleted P.2. The District is eliminating the small surface area exemption (Rule 321.B.2.b). Thus, the 

recordkeeping provision associated with this exemption is no longer needed.

Click here. Page F-27

72 T.1 When the District indicates that qualifying SCMs or solvent cleaning shall comply with the rule the 

first time it is operated or performed in the District, it should be recognized that the provisions in 

Sections H.7, I.7, J.8, J.11, K.6, L.9, and L.11 have an effective date of one year from the date of 

revised rule adoption. Thus, the District does not require new equipment or solvent cleaning 

operations to comply with those rule provisions before the section‟s effective date.

Click here. Page F-28

73 T.2.a The owners and operators of existing solvent machines previously subject to Rule 321 are required 

to maintain continuous compliance when the newly adopted revised rule supersedes the Rule 321 

adopted on September 18, 1997. 

Click here. Page F-28

74 T.2.b Changes to Rules 102, 202, and 321 may cause some previously exempt solvent cleaning machines 

to become subject to Rule 321 for the first time. For example, an unheated solvent rinsing container 

having a capacity of 9 gallons and designed to operate in a closed system fashion is presently 

exempt by Rule 202.U.1 and Rule 321.B.4.f. However, under the revised rules, such a unit will no 

longer be exempt. The District is proposing incremental, phased compliance periods for such units 

that follow the present rule compliance periods.

Click here. Page F-28

75 T.2.b.4) The District is revising this section to indicate that any lip exhaust installed after the adoption of the 

revised rule will need to be vented to an emission control system at the time of its installation.

Click here. Page F-29

76 T.3 The adoption of the revised Rule 321 will eliminate the solvent cleaning (wipe cleaning) exemption 

in Section B.4.a. In general, all existing qualifying solvent cleaning operations are becoming 

subject to Rule 321 for the first time via the proposed amended rule adoption. The District is 

providing incremental, phased compliance periods for solvent cleaning similar to those in the 

existing rule (adopted September 18, 1997).

Click here. Page F-29

Click here to return to the list of Appendices in the Staff Report.
STAFF REPORT - Rule 321 Page G-1

September 20, 2010

Santa Barbara County APCD

Appendix G

Summarized Data on Emission Reductions, Emissions, and Cost-Effectiveness

Table 1. PROJECTED EMISSION REDUCTIONS FOR CALENDAR YEAR 2011a

Reactive Organic Compounds in Tons per Year (Tons per Day)

Item

Company/Facility or Area 

Source Category

Facility or 

EIC 

Number

Device 

No. Categoryb

Projected 

CY 2011 

Emissions, 

tons per year

(tons per 

day)

CY 2011 

Emissions

After Control,

tons per year

(tons per 

day)c

CY 2011 

Emission

Reductions,

tons per year

(tons per 

day)c

1 Bardex Corporation 01152 108834 SCM 0.12

(0.00033)

0.03

(0.00009)

0.09

(0.00024)

2 Celite Corporation 00012 008043 SC 0.15

(0.00042)

0.15

(0.00040)

0.01

(0.00002)

3 Celite Corporation 00012 008043 SCM 0.04

(0.00010)

0.01

(0.00003)

0.03

(0.00008)

4 Helix Medical, LLC. 04487 107500 SC 3.49

(0.00957)

3.35

(0.00919)

0.14

(0.00038)

5 Indigo Systems Corporation 09745 107595 SC 0.79

(0.00217)

0.76

(0.00208)

0.03

(0.00009)

6 Innovative Micro 

Technology, Inc. (IMT)

10867 109942 SC 1.42

(0.00388)

1.36

(0.00373)

0.06

(0.00016)

7 Innovative Micro 

Technology, Inc. (IMT)

10867 110204 SC 0.17

(0.00048)

0.17

(0.00046)

0.01

(0.00002)

8 International Transducer 

Co.

01634 107650 SC 1.07

(0.00293)

1.03

(0.00281)

0.04

(0.00012)

9 Lockheed Martin Missiles 

& Fire Control, SB 

Focalplane

09424 009932 SC 0.43

(0.00118)

0.41

(0.00113)

0.02

(0.00005)

10 Lockheed Martin Missiles 

& Fire Control, SB 

Focalplane

09424 010049 SC 1.17

(0.00322)

1.13

(0.00309)

0.05

(0.00013)

11 Lockheed Martin Missiles 

& Fire Control, SB 

Focalplane

09424 010050 SC 0.65

(0.00179)

0.63

(0.00172)

0.03

(0.00007)

12 Medtronic PS Medical 04635 107596 SC 4.66

(0.01277)

4.47

(0.01225)

0.19

(0.00051)

13 National Aeronautics & 

Space Admin., VAFB, 

Solvent Usage (SLC-2)

06100 111283 SC 0.15

(0.00042)

0.15

(0.00040)

0.01

(0.00002)

14 NuSil Technology 02361 001356 SC 1.12

(0.00308)

1.08

(0.00295)

0.04

(0.00012)

15 NuSil Technology 02361 006026 SC 0.42

(0.00115)

0.40

(0.00111)

0.02

(0.00005)

16 NuSil Technology, Silicone 

Technology

04621 006001 SC 4.19

(0.01148)

4.02

(0.01102)

0.17

(0.00046)

 

a The data shown in this table represents calendar year 2011 figures. The District used data from the 2007 emission 

inventory and applied activity (growth), compliance efficiency, and control factors.

b

Solvent Cleaning Machine (SCM), Solvent Cleaning (SC), or Area Source (AS) categories.

c

Includes the effect of having an 80 percent compliance efficiency.
STAFF REPORT - Rule 321 Page G-2

September 20, 2010

Santa Barbara County APCD

Item

Company/Facility or Area 

Source Category

Facility or 

EIC 

Number

Device 

No. Categoryb

Projected 

CY 2011 

Emissions, 

tons per year

(tons per 

day)

CY 2011 

Emissions

After Control,

tons per year

(tons per 

day)c

CY 2011 

Emission

Reductions,

tons per year

(tons per 

day)c

17 Pacific Scientific, EKD 08934 107600 SC 0.29

(0.00081)

0.28

(0.00077)

0.01

(0.00003)

18 Raytheon Space & 

Airborne Systems

01971 005161 SC 1.02

(0.00279)

0.98

(0.00268)

0.04

(0.00011)

19 Raytheon Space & 

Airborne Systems

01971 005163 SC 0.28

(0.00077)

0.27

(0.00074)

0.01

(0.00003)

20 Raytheon Space & 

Airborne Systems

01971 108489 SC 0.12

(0.00032)

0.11

(0.00031)

0.00

(0.00001)

21 Raytheon Space & 

Airborne Systems

03890 005234 SC 1.07

(0.00292)

1.02

(0.00280)

0.04

(0.00012)

22 Raytheon Space & 

Airborne Systems

04140 107601 SC 1.28

(0.00350)

1.25

(0.00341)

0.03

(0.00009)

23 Raytheon Space & 

Airborne Systems

08742 109000 SC 0.58

(0.00159)

0.56

(0.00153)

0.02

(0.00006)

24 Superconductor 

Technologies, Inc.

10341 107607 SC 0.25

(0.00067)

0.24

(0.00065)

0.01

(0.00003)

25 United States Air Force, 

VAFB, Solvent Usage 

(HAZMART)

00201 007604 SC 1.92

(0.00526)

1.84

(0.00505)

0.08

(0.00021)

26 Degreasing-Cold CleaningPetroleum Naphtha: 

General

220-204-

0500-0000

N/A AS 379.52

(1.03979)

269.69

(0.73887)

109.84

(0.30092)

27 Degreasing-Cold CleaningAlcohols (Unspecified)220-204-

3022-0000

N/A AS 25.54

(0.06999)

24.62

(0.06745)

0.92

(0.00253)

28 Degreasing-Cold CleaningTerpenes (Unspecified)220-204-

3333-0000

N/A AS 14.60

(0.03999)

10.37

(0.02842)

4.22

(0.01157)

29 Degreasing-Cold CleaningOther/Not Classified: 

Specify Degreasing

220-204-

8106-0000

N/A AS 69.34

(0.18996)

49.23

(0.13487)

20.11

(0.05509)

30 Degreasing-HandwipingPetroleum Naphtha220-208-

0500-0000

N/A AS 47.44

(0.12997)

19.98

(0.05474)

27.46

(0.07523)

31 Degreasing-HandwipingAlcohols (Unspecified)220-208-

3022-0000

N/A AS 58.39

(0.15997)

56.28

(0.15418)

2.11

(0.00579)

32 Degreasing-HandwipingGlycol Ethers (Unspecified)220-208-

3176-0000

N/A AS 7.30

(0.02000)

2.96

(0.00812)

4.33

(0.01188)

33 Degreasing-HandwipingKetones (Unspecified)220-208-

3204-0000

N/A AS 43.79

(0.11998)

27.90

(0.07643)

15.89

(0.04354)

34 Degreasing-HandwipingToluene/Xylene220-208-

3339-0000

N/A AS 10.95

(0.02999)

10.55

(0.02890)

0.40

(0.00110)

35 Degreasing-HandwipingDegreasing Solvents-Pure 

(Unspecified)

220-208-

8104-0000

N/A AS 3.65

(0.01000)

2.72

(0.00746)

0.92

(0.00253)

36 Degreasing-HandwipingDegreasing SolventsBlends (Unspecified)220-208-

8106-0000

N/A AS 18.25

(0.04999)

13.62

(0.03732)

4.62

(0.01267)

Totals

705.63

(1.93323)

513.62

(1.40718)

192.01

(0.52605)
STAFF REPORT - Rule 321 Page G-3

September 20, 2010

Santa Barbara County APCD

Table 2. EMISSION REDUCTION ESTIMATES FROM THE 2007 CLEAN AIR PLAN ANALYSIS 

VERSUS THE CURRENT DATA FOR REVISED RULE 321

Category

CY 2015 Projected Emission 

Reductions, tons per year 

(tons per day)

CY 2020 Projected Emission 

Reductions, tons per year 

(tons per day)

Emissions Reductions per the 2007 Clean Air Plan (Base Year: CY 2002)

ARB Area Source 249.14 

(0.6826)

274.28 

(0.7515)

Solvent Cleaning Machines 

(SCMs)

4.91 

(0.0134)

4.90 

(0.0134)

Solvent Cleaning (SC) 8.89 

(0.0244)

8.86 

(0.0243)

TOTAL 262.94 

(0.7204)

288.04 

(0.7891)

Emissions Reductions per the 2010 Rulemaking Effort (Base Year: CY 2007)

ARB Area Source 190.84 

(0.5229)

190.84 

(0.5229)

Solvent Cleaning Machines 

(SCMs)

0.11 

(0.0003)

0.11 

(0.0003)

Solvent Cleaning (SC) 1.06 

(0.0029)

1.06 

(0.0029)

TOTAL 192.02

(0.5261)

192.02 

(0.5261)

2007 Clean Air Plan Over-Projected Emission Reductions 

DIFFERENCE -70.92 

-(0.1943)

-96.02 

-(0.2631)
STAFF REPORT - Rule 321 Page G-4

September 20, 2010

Santa Barbara County APCD

Table 3. BREAKDOWN OF THE 2007 BASE YEAR 

SOLVENT EMISSIONS DATA BY INVENTORY CATEGORIESa

Descriptions

ROC Emissions, 

tons per year 

(tons per day)

Percent of the 

Total

1. ARB Area-Wide Category for Degreasing (EIC 220-204-XXXX0000 and 220-208-XXXX-0000)678.90 

(1.86000)

52.85%

2. ARB Area-Wide Category for Cleanup Solvent Emissions 

Associated with Auto Refinishing, Metal Parts and Products 

Coatings, Wood Furniture and Fabricated Products Coatings 

Category (EIC 230-240-8300-0000)

54.60 

(0.21000)

4.25%

3. ARB Area-Wide Category for Cleanup Solvent Emissions 

Associated with Printing (EIC 240-995-80000-0000)

21.54 

(0.05901)

1.68%

4. ARB Area-Wide Category for Cleanup Solvent Emissions 

Associated with the use of Adhesives and Sealants (EIC 250-292-

8202-0000 and 250-292-8250-0000)

5.52 

(0.02124)

0.43%

5. ARB Area-Wide “Other” Solvent Category for (EIC 299-995-

8000-0000)

28.54 

(0.10978)

2.22%

6. ARB Area-Wide Category for Cleanup Solvent Emissions 

Associated with Fiberglassing (EIC 410-403-5018-0000)

0.32 

(0.00124)

0.03%

7. ARB Area-Wide Category for Solvent Cleaning Emissions from 

the use of Consumer Products (EIC 510-506-XXXX-0000)

412.45 

(1.13000)

32.11%

8. ARB Area-Wide Category for Cleanup Solvent Emissions 

Associated with Architectural Coating Use (EIC 520-520-XXXX0000)

26.00 

(0.10000)

2.02%

9. Santa Barbara County APCD Point Source Inventory for 

Emissions from Solvent Cleaning Machines and Solvent Cleaning, 

Cleanup Solvent Emissions Associated with Auto Refinishing, Metal 

Parts and Products Coatings, Wood Furniture and Fabricated

Products Coatings, Printing, Adhesives and Sealants, Fiberglassing, 

and Application of Architectural Coatings (EICs 220-204-XXXX0000, 220-208-XXXX-0000, 230-240-8300-0000, 240-995-80000-

0000, 250-292-8202-0000, 250-292-8250-0000, 410-403-5018-0000, 

and 520-520-XXXX-0000)

56.63 

(0.15516)

4.41%

TOTAL 1,284.51 

(3.64642)

100.00%

 

a The District included this table in response to requests from the regulated community. The table shows the ROC 

emission contributions by the different inventory categories. 
STAFF REPORT - Rule 321 Page G-5

September 20, 2010

Santa Barbara County APCD

Table 4. PERCENTAGE BREAKDOWNS OF THE 2007 BASE YEAR 

SOLVENT EMISSIONS DATA BY INDUSTRY TYPESa

Breakdown Description

Point Sources

Area 

Sources

Mining 

(includes 

Oil & Gas)

Electronic 

Device 

Mfg

Medical 

Device 

Mfg

Aircraft 

and 

Aerospace

Otherb

Percentage Compared to the 

Total Stationary Source 

Emissions (56.63 TPY, 

0.1552 TPD)

28.02% 15.81% 27.43% 21.48% 7.25% -

Percentage Compared to the 

Total Emissions (1284.51 

TPY, 3.6464 TPD)

1.24% 0.70% 1.21% 0.95% 0.32% 95.59%

Table 5. COST-EFFECTIVENESS FOR REPLACING 

TWO HIGH-ROC COLD CLEANERS WITH ONE AQUEOUS UNITc

Control Option: 

Switching from Two 

High-ROC Cold 

Cleaners to:

Cost per 

Year

CostEffectiveness 

($/ton of ROC 

reduced)

One Low-Use BatchLoaded Automated 

Aqueous Unit

-$112 

(savings)

-$2,560 

(savings)

One Average-Use 

Batch-Loaded 

Automated Aqueous 

Unit

-$362 

(savings)

-$3,310 

(savings)

One High-Use BatchLoaded Automated 

Aqueous Unit

-$412 

(savings)

-$1,880 

(savings)

 

a The District included this table in response to requests from the regulated community. The table shows the 

emissions contributions (percentages) by different industry types based on the District point source data and the 

ARB area source inventory. In cases where more than one category was applicable (e.g., emissions from the 

manufacturing of electronic equipment used in aerospace vehicles), staff included the data in the end use category. 

The largest category of emissions, the ARB area-wide degreasing category, may also include data from the point 

source industry types shown in this table.

b

Includes facilities that are not in the other categories (e.g., a wooden dashboard manufacturer, concrete batch 

plants, an architectural product manufacturer, automobile refinishing, furniture coating/staining operations, various 

metal parts and products coating operations, a water treatment system manufacturer, and a sign manufacturer).

c Reference: San Joaquin Valley Unified Air Pollution Control District, Final Staff Report - Amendments to Rule 

4662 (Organic Solvent Degreasing Operations), May 11, 2001.
STAFF REPORT - Rule 321 Page G-6

September 20, 2010

Santa Barbara County APCD

Table 6. COST-EFFECTIVENESS FOR REPLACING 

A HIGH-ROC COLD CLEANER WITH AN AQUEOUS OR ENZYME UNITa

Control Option: 

Switching from One 

High-ROC Cold 

Cleaners to:

Cost per 

Year

CostEffectiveness 

($/ton of ROC 

reduced)

Low-Use Aqueous 

Unit

$545 $12,940

Average-Use Aqueous 

Unit

$903 $8,560

High-Use Aqueous 

Unit

$1,393 $6,600

Low-Use Enzyme Unit $370 $8,120

Average-Use Enzyme 

Unit

$430 $3,800

High-Use Enzyme 

Unit

$470 $2,080

One Low-Use BatchLoaded Automated 

Aqueous Unit

$130 $9,440

One Average-Use 

Batch-Loaded 

Automated Aqueous 

Unit

$240 $2,320

One High-Use BatchLoaded Automated 

Aqueous Unit

$790 $3,840

Table 7. COST-EFFECTIVENESS FOR SOLVENT CLEANING TECHNIQUESb

Scenario Cost per 

Year

Emission 

Reduction 

(tons/year)

CostEffectiveness 

($/ton of ROC 

reduced)

1. Use of an Aqueous 

Cleaning Solution 

Diluted at a 4:1 Ratio

-$281,038

(savings)

283.83 -$990

(savings)

2. Use of an Aqueous 

Cleaning Solution

Diluted at a 2:1 Ratio

$615,039 283.83 $2,167

Click here to return to the list of Appendices in the Staff Report.

 

a Reference: San Joaquin Valley Unified Air Pollution Control District, Final Staff Report - Amendments to Rule 

4662 (Organic Solvent Degreasing Operations), May 11, 2001.

b Compiled from data in the San Joaquin Valley Unified Air Pollution Control District, Final Staff Report: Organic 

Solvent Cleaning Project, Appendix A, December 20, 2001.
STAFF REPORT - Rule 321 Page H-1

September 20, 2010

Santa Barbara County APCD

Appendix H

Santa Barbara County 

Identification of Existing Federal and Air Pollution Control District Regulations 

that Apply to the Same Equipment or Source Type Covered in Rule 321

This section is included to comply with the California Health & Safety Code Section 40727.2 requirements. 

Federal Air Pollution Control Requirements

The federal requirements in the below-referenced statutes apply to the same equipment or source types covered by 

Rule 321: 

 40 CFR, Part 63, Subpart T, National Emission Standards for Hazardous Air Pollutants: National Emission 

Standards for Halogenated Solvent Cleaning. (Solvent cleaning machines.) 

 40 CFR, Part 63, Subpart GG, National Emission Standards for Aerospace Manufacturing and Rework 

Facilities. (Handwipe cleaning in the aerospace industry.)

Santa Barbara County Air Pollution Control District Requirements

These are shown in the following table.

Table 1. RULES THAT APPLY TO SOLVENT CLEANING MACHINES AND 

SOLVENT CLEANING SUBJECT TO RULE 321

GENERIC REQUIREMENTS AFFECTED EMISSION 

UNITS BASIS FOR APPLICABILITY

RULE 201: Permits Required All emission units Emission of pollutants

RULE 202: Exemptions to Rule 201 Applicable emission units Insignificant activities/emissions, 

per size/rating/function

RULE 210: Fees All emission units Administrative 

RULE 212: Emission Statements All emission units Administrative

RULE 302: Visible Emissions All emission units Particulate matter emissions

RULE 303: Nuisance All emission units Emissions that can injure, 

damage or offend.

RULE 317: Organic Solvents All emission units Emission of pollutants

RULE 322: Metal Surface Coating 

Thinner and Reducer

All emission units Composition of organics in all 

metal surface coating thinners 

and reducers shall not be 

photochemically reactive

RULE 324: Disposal and 

Evaporation of Solvents

All emission units Solvent disposal requirements

REGULATION VIII: New Source 

Review

All emission units Addition of new equipment or 

modification to existing 

equipment. Applications to 

generate ERC Certificates.

REGULATION XIII (RULES 1301-

1305): Part 70 Operating Permits

All emission units A stationary source is a major 

source.

A review of Table 1 indicates that there are no overlapping or conflicting averaging provisions, units, or any other 

pertinent provisions associated with emission limits.

Click here to return to the list of Appendices in the Staff Report.
THIS PAGE INTENTIONALLY LEFT BLANK
STAFF REPORT - Rule 321 Page I-1

September 20, 2010

Santa Barbara County APCD

Appendix I

Santa Barbara County 

Clarification of Rule Issues

The District worked closely with the regulated community to develop special approaches to their individual needs

and to clarify rule text. As a result of these efforts, staff received extensive feedback and input during the 

development stages. Also, members of the regulated community raised questions about the intent of certain rule 

provisions through discussions with staff and at the rule development public workshops and meetings. 

The following text provides clarification of rule issues and consolidates comments/responses.a To help the reader 

locate a specific issue, a table of contents is provided below.

Table 1. TABLE OF CONTENTS FOR THE CLARIFICATION OF RULE ISSUES

Rule Section Topic Page

102 Request to Modify the Definition of Reactive Organic Compound I-4

102 Adding IPA to the Exempt Compound List in the Rule 102 Definition of 

“Reactive Organic Compound”

I-4

102 Definition of “Coating” I-4

102, 321.B.1 Definition of “Solvent” and the Rule 321.B.1 Exemption I-5

102 “Solvent Cleaning” Definition I-5

102 Clarification of the “Stripping” Definition I-5

102 Request to Include the Definition of “Toxic Air Contaminant” in Rule 

102

I-5

102 Scope of the “Application Equipment” Definition I-6

201 Rule 201 Permitting Program and Issuing Permits with Pounds per Day 

and Tons per Year Emission Limits

I-6

201 Rule 201 Permitting Program and the Need for a PTO Modification when 

Switching Solvents

I-6

202.I.3, 202.U.2.d.i, 

and 202.U.3

The Thresholds Should be Changed to 25 Grams of ROC per Liter I-6

202.U.2.a Meaning of “Liquid Surface Area” I-7

202.U.2.a Support Documentation Required When Claiming the Exemption for 

Remote Reservoir SCMs (Aggregate Surface Area is Less than 10 Square 

Feet)

I-7

202.U.2.c, 202.U.2.d New Term “Cleaning Agents” I-7

202.U.3 55 Gallons of Solvent per Year Permit Exemption Limit I-7

202.U.3 Wipe Cleaning Permit Exemption I-8

202.U.3 Confusing Text in Existing Rule 202.U.3 I-8

321 Rule 321's Complexity I-8

321 Request to Not Modify Rule 321 I-8

321.A Solvent Emissions from Hospitals (and Other Health Care Facilities) and 

Janitorial Services

I-9

321.A Ozone Depleting and Global Warming Compounds I-9

321.B, 321.C Exemptions and Definitions I-10

321.B Request to Exempt Isopropyl Alcohol I-10

321.B Request to Exempt Small Containers (e.g., One Liter) from Rule 321 

Solvent Cleaning Requirements

I-10

321.B Loss of Rule 321 Exemptions I-10

321.B, 321.M.3 Request to Exempt Paint Clean-Up Operations that Use Solvents I-11

 

a Comments received during the formal public comment period preceding the Board adoption hearing on the 

proposed rule changes, and staff‟s response to these comments, will be presented to the District Board of Directors 

as part of the rule adoption process.
STAFF REPORT - Rule 321 Page I-2

September 20, 2010

Santa Barbara County APCD

Rule Section Topic Page

321.B.1 Compounds that are Classified as Being both a “Toxic Air Contaminant” 

and a “Non-Reactive Organic Compound”

I-11

321.B.1.a, 321.P.1 Methods for Determining a Solvent's ROC Content I-11

321.B.4 “Stripping” Exemption I-12

321.B.4 Removing Cured or Partially Cured Silicone from Production Equipment 

(e.g., Wooden Stirring Spoons)

I-12

321.B.4 Exemption for Stripping Cured Coatings, etc. I-12

321.B.6 Exemptions for Solvent Cleaning Subject to Other District Rules I-13

321.B.8 ROC Limits for Batch Solvent Cleaning Machines Cleaning ElectroOptical Devices I-13

321.B.8 Exemption from Sections H.7, I.7, and K.6 I-13

321.B.8.a Specific Exemptions from the ROC Limits for Highly Technical and/or 

Precision Equipment Cleaning

I-13

321.B.8.b Analytical Equipment Exemption I-13

321.B.8.b Request to Exempt Research and Development Programs from Solvent 

ROC-Content Limits

I-14

321.B.9 Aerosol Solvent Exemption I-14

321.B.9, 321.B.11.b Exemptions/Requirements for Squeeze Bottles, Beakers, and Solvent 

Containers Having 1 Gallon Capacity or Less

I-14

321.B.10 There Should be No ROC Limits When Cleaning Application Equipment 

Associated with Satellite Coatings and Radiation-Effect Coatings

I-14

321.B.14 Exemption for Wipe Cleaning at Health Care Facilities, etc. I-14

321.B.15 Exemption from the Solvent Cleaning ROC-Content Limits for Sources 

Using 55 Gallons of Solvent per Year or Less

I-14

321.B.16.h Solvent Cleaning Exemption for Offshore Oil and Gas Platforms I-15

321.B.22 Cleaning of Vacuum Chambers I-15

321.C Suggested Changes to the Definition of “Electronic Components” I-15

321.C, 321.F Gas Turbine Engine Cleaning I-15

321.C Definition of “Medical Device” I-16

321.C Definition of “Solvent” Including Toxic Air Contaminants (TACs) I-16

321.C Request for a Definition of and Provisions for “Solvent Cleaning 

Stations” 

I-17

321.C Change in the Method for Determining the Contact Location of the 

Solvent/Air Interface for Vapor SCMs

I-17

321.D - M Level of Stringency of the PAR 321 Requirements I-17

321.D - S Inspection and Maintenance Plan Not Required for Solvent Cleaning 

Machines

I-18

321.D - S Enforcement of the New ROC-Limits I-18

321.D, 321.H, 321.G Requirements for Remote Reservoir Cleaners that Were Previously 

Exempt from Rule 321

I-18

321.D.1 CEQA Analysis for the Rule 321 Project‟s “Closed Container” 

Requirement

I-19

321.D.1 Meaning of “Tight-Fitting Cover” I-19

321.D.5 Cover Requirements I-19

321.D.9 & 321.M.2.c Use of Nitrogen Gas to Expedite Solvent Draining/Removal from 

Cleaned Parts

I-19

321.D.10 - 12 Necessity of the Proposed New Housekeeping Requirements I-19

321.D.10 - 13 Enforcement of the Proposed New Housekeeping Requirements I-20

321.D.11 Allowing Minimal Amounts of Solvent Atomization Without Emission 

Controls

I-20

321.D.12 Transferring Solvent I-21

321.E, 321.K, 321.L Request to Eliminate Potentially Antiquated Parts of Rule 321 I-21
STAFF REPORT - Rule 321 Page I-3

September 20, 2010

Santa Barbara County APCD

Rule Section Topic Page

321.H.7, 321.I.7, 

321.K.6

PAR 321.H.7, I.7, & K.6 Sentence Structure I-21

321.H.7, 321.I.7, 

321.K.6, 321.M.1

Aqueous Solvents Will Not Work for Many Solvent Applications I-22

321.H.7, 321.I.7, 

321.K.6, 321.M.1

Cleaning Electronic Components and Medical Devices With the IPA I-22

321.H.7, 321.I.7, 

321.K.6, 321.M.1

Making Certain Solvents Illegal I-22

321.H.7, 321.I.7, 

321.K.6, 321.M.1

Rule 321 Impacts I-22

321.H.7, 321.I.7, 

321.M.1

Setting the General Solvent ROC-Content Limit at 50 or 25 Grams per 

Liter

I-23

321.H.7, I.7, K.6, M.1 PAR 321 and Interactions with Rules 322 and 324 I-23

321.H.7, I.7, K.6, M.1 PAR 321 and Interaction with Rule 317 I-23

321.H.7, I.7, K.6, M.1 Solvent Cleaning Emissions that Have Been Offset and the Need to 

Comply with Prohibitory Rule Requirements

I-23

321.J.8, 321.L.9 Requirement for Vapor SCMs to Have a Freeboard Ratio of 1.0 I-23

321.M Use of a Low Volatility or Partial Pressure Alternative I-24

321.M.1 Cleaning of “Clean Rooms” and General Work Areas I-24

321.M.1 ROC Limits for Aerospace Solvent Cleaning I-24

321.M.1 Solvent ROC Content Limit When Cleaning Spray Application 

Equipment

I-24

321.M.1 ROC Limits When Performing Repair and Maintenance Cleaning of 

Electronic and Cleaning Coatings Application Equipment

I-25

321.M.1 PAR 321.M.1 Table 1 Limits I-25

321.M.1 Adding a Specific Category to PAR 321.M.1, Table 1, for “Silicone 

Manufacturing”

I-25

321.M.2.c Purging Operations I-25

321.M.3 Meaning of “Enclosed” I-25

321.M.3 Scope of the PAR 321.M.3 provisions and Omitting the Word “Spray” 

from the Rule 321 Definition of “Application Equipment”

I-26

321.N.6 Methods for Determining Compliance with PAR 321.N.6 I-26

321.R.1.b.3 Increased Recordkeeping Provisions I-26

321.R.1.b.5 Use of Blended/Mixed Solvents I-27

321 - Support Data Disclosure of Emission Inventory Data and Banning IPA I-27

321 - Support Data Request for a Summary that Compares the Emissions Contribution for all 

Sources of Solvent Emissions

I-27

321 - Support Data Emission Reduction Calculations I-27

321 - Support Data Emission Reduction Estimates I-28

321 - Support Data Emission Reductions from Hospitals, Janitorial, and Autobody Shops I-28

321 - Support Data Unspecified Area Source Categories I-28

321 - Support Data Emission Reductions from Auto Repair Shops I-28

321 - Support Data Basis for Calculating Emissions from Hospitals and Janitorial Services I-28

321 - Support Data Modeling Rule 321 on Other Air District Rules I-29

323.B Architectural Coating Application Equipment Cleaning I-29

339.B.8 Requirement to Use Low-VOC Solvents for Auto Painting I-29
STAFF REPORT - Rule 321 Page I-4

September 20, 2010

Santa Barbara County APCD

Rule 102

Request to Modify the Definition of Reactive Organic Compound

Question/Issue: The definition of “reactive organic compound” should be updated to include the following 

exempt compounds:

Methyl formate, tertiary-butyl acetate, HFE-7100, and HFE-7200

Answer/Response: The District is revising the reactive organic compound (ROC) definition by incorporating 

all of the 40 CFR, Part 51, Section 51.100(s) exempt compounds. The PAR 102 ROC definition includes a note 

on there being Rule 202.D.10.l.1 and 2 gatekeepers on some of the exempt compounds. The Rule 102 note 

indicates:

Rule 202.D.10.l.1 requires an Authority to Construct and Permit to Operate when using more than one 

gallon per year per stationary source of any one of the following exempt compounds: dimethyl carbonate, 

methyl formate, HCFC-225ca, HCFC-225cb, HFC-43-10mee, HFC-245fa, HFC-365mfc, or HFE-7100 

[(CF3)2CFCF2OCH3 or C4F9OC2H5]. Rule 202.D.10.l.2 requires an Authority to Construct and Permit to 

Operate when using more than one gallon per year per stationary source of tertiary-butyl acetate. The one 

gallon per year per stationary source limit is a per compound limit for each compound in aggregate for the 

entire stationary source and includes any amounts of the compound used in mixed or diluted product.

The new Rule 202.10.l provision will override and negate any otherwise applicable permit exemptions if a 

source uses more than one gallon per year per stationary source of any of the nine listed compounds. The need 

to issue Permits on the use of these compounds stems from ARB not providing a recommendation to include 

these as exempt compounds. This approach will allow the District the opportunity to perform any CEQA and/or 

health risk assessments that may be triggered by such use.

Adding IPA to the Exempt Compound List in the Rule 102 Definition of “Reactive Organic Compounds”

Question/Issue: IPA should be considered to be an exempt compound (i.e., a non-ROC). IPA is very similar in 

chemical nature, structure and ozone forming capabilities to acetone which has already been de-listed.

Scientific justification for exemption of IPA can be found in the chemical structure of IPA in comparison to the 

structure of acetone which is currently exempted in Santa Barbara County and the entire United States. Acetone 

and IPA are differentiated by the mere substitutions of an atom of oxygen for a hydroxyl group.

 

 

Answer/Response: When the Environmental Protection Agency lists IPA as an exempt compound in the 40 

CFR, Part 51, Section 51.100(s), definition of volatile organic compounds (VOC), the District will consider 

modifying the Rule 102 definition of reactive organic compounds to include this compound. 

Definition of “Coating”

Question/Issue: On the new definition of “coating” in Rule 102, is it the District's intent to include adhesives 

and sealants?

Answer/Response: Yes. (The “coating” definition is from SJV Rule 4663.)

Click here to return to the Table of Contents.

H3C-C-CH3 H3C-C-CH3

O OH

acetone isopropyl alcohol
STAFF REPORT - Rule 321 Page I-5

September 20, 2010

Santa Barbara County APCD

Definition of “Solvent” and the Rule 321.B.1 Exemption

Question/Issue: Earlier drafts of PAR 102 and PAR 321 were confusing on the definition of “solvent” and the 

Rule 321.B.1 exemption provision. Is it the District's intention that Rule 321 will apply to a solvent that 

contains only a trace amount of TAC?

Answer/Response: No, if a solvent contains a TAC in excess of 2 percent by weight, then Rule 321 will apply. 

The revised PAR 321.B.1 text now reads:

1. Any solvent cleaning machine equipped with and any solvent cleaning performed with a solvent (including 

emulsions) that contains two percent by weight or less of each of the following:

a. Reactive organic compounds (as determined by Environmental Protection Agency method 24), and

b. Toxic air contaminants (as determined by generic solvent data, solvent manufacturer‟s composition 

data or by a gas chromatography test and a mass spectrometry test). 

c. Any person claiming this exemption shall maintain the records specified in Sections R.1.a.1) and 

R.1.a.2) in a manner consistent with Section R.3 and make them available for review.

“Solvent Cleaning” Definition

Question/Issue: The “solvent cleaning” definition should include “loosely held” text to avoid confusion and to 

differentiate processes where loosely held contaminants like grease and oils are readily removed from surfaces 

versus processes requiring scraping and/or stripping. 

Answer/Response: The new “solvent cleaning” definition proposed in amended Rule 102 is modeled on the 

SJV Rule 4663 definition. Although the proposed definition does not use the term “loosely held,” it does 

include the adjective “uncured” in several places. Also, the District is adding a “stripping” definition in Rule 

102 and text in the definitions of “solvent cleaning” and “solvent cleaning machine” to clarify when “stripping”

does and does not apply.

Clarification of the “Stripping” Definition

Question/Issue: Would the removal of dried waxes (requires toluene) be considered “stripping”?

Answer/Response: No, the process of removing wax from a part or product with a solvent falls within the PAR 

102 definition of “solvent cleaning.” Toluene (ROC content 866 g/l) may be allowed per the PAR 321.M.1, 

Table 1, limits depending on the solvent cleaning category.

Request to Include the Definition of “Toxic Air Contaminant” in Rule 102

Question/Issue: The District should include a definition of “toxic air contaminant” in Rule 102 to help sources 

understand the requirements.

Answer/Response: OK, the District added the following definition to PAR 102:

“Toxic Air Contaminant” means “Toxic air contaminant” as defined in Health and Safety Code Section 

39655.

To help sources understand what compounds are TACs per Health and Safety Code Section 39655, staff 

developed a list of TACs. This list is provided as Appendix M, to the Rule 321 project‟s Staff Report. 

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STAFF REPORT - Rule 321 Page I-6

September 20, 2010

Santa Barbara County APCD

Scope of the “Application Equipment” Definition

Question/Issue: Does the District view metal deposition (e.g., evaporation, sputtering) as an “application 

operation”? I‟d recommend adding some language in PAR 321 to make this clear.

Answer/Response: Yes, technically a “metal deposition operation” is considered to involve “application 

equipment.” PAR 102 includes new definitions for “application equipment” and “coating.” The scope of these 

definitions includes “metal deposition operations.” PAR 321.B.22 provides exemptions for film deposition 

processes and related maintenance operations.

Rule 201

Rule 201 Permitting Program and Issuing Permits with Pounds per Day and Tons per Year Emission Limits

Question/Issue: Why does the District issue permits with pounds per day and tons per year limits? 

When a permit is issued with pounds per day limits, lowering the ROC content of individual materials does not 

result in a net air quality improvement unless the permit is also amended. Thus, sources with permits that have 

been issued in pounds per day should be exempt from all prohibitive rule ROC limit requirements. 

Answer/Response: Provisions in Regulation VIII, New Source Review (NSR), have thresholds based on 

pounds per day and tons per year. These thresholds are the genesis for the District to issue permits with 

conditions limiting emissions in pounds per day and tons per year. 

The revised Rule 321 will limit the solvent‟s ROC content, which may result in an air quality benefit depending 

on the existing specific operation and solvents involved. 

If the revised Rule 321 provisions achieve emission reductions for activities that have already been offset, then 

the offset liability would be reduced. The permit holder could choose to revise the permit accordingly. Rule 

802.E.2 and E.3 provisions require that there be a net air quality benefit. 

Rule 201 Permitting Program and the Need for a PTO Modification when Switching Solvents

Question/Issue: Will a source permitted to use an ROC solvent need to get a modified Permit to Operate if it 

wants to switch to a different compound?

Answer/Response: No, unless 1) there is an increase in ROC emissions that exceeds the currently permitted 

rate, 2) there is an increase in TAC emissions that exceed a toxic risk assessment emissions cap, or 3) the new 

solvent is subject to the Rule 202.D.10.l provision. A source using a TAC should already be subject to health 

risk analysis (HRA) on a periodic basis per the AB 2588 process. During a new source review process, the 

District does a health risk screening analysis and performs more-detailed modeling if needed. If the PTO did 

not require a modification, when the District performs the permit reevaluation we will update any health risk 

data to reflect the use of the current solvent.

Question/Issue: What about switching from an ROC solvent to a non-ROC TAC solvent, would there be TAC 

emission limits in the permit?

Answer/Response: No, only a toxic risk assessment gatekeeper in the permitting records. 

Rule 202

The Thresholds Should be Changed to 25 Grams of ROC per Liter

Question/Issue: The thresholds in Rule 202, Sections, I.3, U.2.d.i, and U.3 should be changed to be 25 grams of 

ROC per liter.

 

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STAFF REPORT - Rule 321 Page I-7

September 20, 2010

Santa Barbara County APCD

Answer/Response: We are aware that the South Coast AQMD Rule 219 has permitting thresholds for 

equipment using solvents above 25 grams per liter. The District plans to lower the Rule 321 general solvent 

limit to 25 grams per liter in a few years and will likely amend Rule 202 at that time for consistency with the 

Rule 321 provisions.

Meaning of “Liquid Surface Area”

Question/Issue: On the Rule 202.U.2.a exemption provision, we are concerned that there may be some 

interpretation on the surface area being the surface area of the drum under the drain and not the drain.

Answer/Response: The District added text to Rule 202.U.2.a and the definition of “Solvent/Air Interface Area”

in Rule 321 to specify it is the area of the drain for remote reservoir solvent cleaning machines. 

Support Documentation Required When Claiming the Exemption for Remote Reservoir SCMs (Aggregate Surface 

Area is Less than 10 Square Feet)

Question/Issue: Will the proposed amended rules require sources to provide support documentation on their use 

of remote reservoir solvent cleaning machines to ensure that the 10 square feet aggregate threshold is not 

exceeded?

Answer/Response: Existing Rule 202.D.1 requires that records be kept and made available upon request. The 

District is not proposing any revisions to that requirement. 

Sources claiming an exemption under Rule 202.U (including Section 2.a, which generally applies to remote 

reservoir solvent cold cleaning machines) are currently required to keep records per Rule 202.D.1. At a large 

source with numerous remote reservoir SCMs, the District recommends that the records be routinely updated 

(monthly or, at a minimum, quarterly) to ensure that the Rule 202.U.2.a “10 square feet” exemption 

applicability threshold limit is not exceeded. 

Existing sources claiming the Rule 321.B.2.b “small surface area” exemption are required to maintain quarterly 

records per the existing Rule 321.P.2 provision. Thus, there should already be procedures in place for such 

sources for demonstrating they are eligible for the exemption claim.

New Term “Cleaning Agents”

Question/Issue: In earlier drafts of revised Rule 202.U.2.c and d, there is a new term: cleaning agents. Why 

not just say “solvent.”

Answer/Response: OK, the District now proposes to replace the existing current “materials” text with “solvent” 

or “solvents.”

55 Gallons of Solvent per Year Permit Exemption Limit

Question/Issue: Rules 202.U.3 needs to be revised to address the use of low-ROC solvents such that the 55 

gallons per year threshold is not triggered when using low-ROC solvent.

Answer/Response: The District added text to this section to exclude low-ROC solvents from the tally when 

determining compliance with the 55 gallons per year per source threshold figure. Hence, a source may use 

more than 55 gallons per year of solvent in solvent cleaning without a permit providing: 1) the solvent has an 

ROC content of 50 grams per liter or less, 2) the source does not exceed the 10 tons per calendar year aggregate 

provision of Rule 202.U, and 3) the solvent cleaning complies with provisions in Rule 321.

Question/Issue: Our interpretation of the Rule 202.U.3 exemption is that any facility at a stationary source that 

uses more than 55 gallons per year of wipe solvents is required to get an air permit for its overall solvent use.

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STAFF REPORT - Rule 321 Page I-8

September 20, 2010

Santa Barbara County APCD

Answer/Response: The 55 gallons per year or less usage rate provision is a “stationary source” limit, not a 

“facility” limit. The District modified Rule 202 on June 19, 2008 to clarify that the 55 gallons per year usage is 

a stationary source limitation. 

Wipe Cleaning Permit Exemption

Question/Issue: Delete Rule 202.U.3 because other air districts do not require permits for solvent wipe 

cleaning.

Answer/Response: The District added the provision as a gatekeeper in 1997 when there were significant 

changes made to Regulations II and VIII. We added the gatekeeper text at the request of the Environmental 

Protection Agency. We would reconsider this request if the U.S.EPA suggested that we remove it.

Confusing Text in Existing Rule 202.U.3.

Question/Issue: Rule 202.U.3 indicates, “Equipment used in wipe cleaning operations ...” Wipe cleaning is 

typically done by hand without employing equipment. Is it the District's intent to exempt wipe cleaning from 

permit requirements?

Answer/Response: No, it is the District's intent to require permits for wipe cleaning operations that exceed 55 

gallons per year per stationary source. The District has revised the text for clarification.

Rule 321

Rule 321's Complexity

Question/Issue: Some members of the regulated community believe the rule is too complicated and hard to 

follow.

Answer/Response: The District is working with the regulated community to improve rule clarity on the 

modified text. The SCM and solvent cleaning requirements are similar to the provisions found in other district 

rules. However, our “packaging” of the requirements is a little different. Some air districts have one rule for 

SCMs and another rule for solvent cleaning. For PAR 321, the SCM requirements are in Sections D - L and the 

solvent cleaning requirements are in Sections D and M.

To provide additional guidance on the provisions, staff prepared the Staff Report's Appendix L, Flowchart 

Overviews of Key Provisions of Rule 202 and Proposed Amended Rule 321.

Request to Not Modify Rule 321

Question/Issue: “Leave well enough alone.” Presently, while Santa Barbara‟s air quality continues to improve 

it is particularly perplexing why this type of law that restricts basic manufacturing competitiveness would be 

proposed as essential to maintaining compliance with current state and federal ozone standards.

Answer/Response: For many years, manufacturers in other areas in the state (e.g., South Coast AQMD, San 

Joaquin Valley Unified APCD, Ventura County, Bay Area AQMD, Sacramento Metropolitan AQMD areas) 

have complied with requirements similar to the ones we proposed. Adopting the revised Rule 321 is necessary 

to comply with the state requirement to adopt every feasible control measure and is part of the Federal Ozone 

Maintenance Plan. The District has been very accommodating to industry requests for exemption and/or 

proposals for specific cleaning categories with high ROC solvent limits. We do not anticipate that the regulated 

community will be significantly impacted by the adoption of the proposed rule revisions. In some cases, 

industry may find cost savings by switching to new technologies and/or aqueous solvent cleaning methods.

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STAFF REPORT - Rule 321 Page I-9

September 20, 2010

Santa Barbara County APCD

Solvent Emissions from Hospitals (and Other Health Care Facilities) and Janitorial Services

Question/Issue: Why do the District rules exempt or not apply to 1) IPA solvent wipe cleaning emissions at 

hospitals and other health care facilities, and 2) solvent cleaning emissions from commercial janitorial services?

We request the rulemaking and enforcement authority assigned to the District, allowing regulation of stationary 

sources, be applied evenhandedly to all local businesses and with objective scientific rationale.

Answer/Response: The revised rule needs to meet the “every feasible measure” requirement in state law. In 

general, if other air districts have adopted rules and such rules have achieved emission reductions, then the 

Santa Barbara County APCD should also adopt similar control measures. No air districts have regulated 

emissions of IPA from wipe cleaning at hospitals or solvent cleaning emissions from janitorial services. 

Analysis indicates that the IPA solvent cleaning emissions at hospitals and other health care facilities are less 

than 1 percent and the commercial janitorial cleaning emissions are about 4.5 percent of the total solvent 

emissions in the inventory. 

The cleaning techniques used in hospitals and other health care facilities and by janitors do not lend themselves 

well to the solvent cleaning control techniques found in the industrial setting. The District has added 

exemptions into Rule 202 and 321 to clarify that such cleaning is not subject to permitting or the solvent 

cleaning provisions (reference PAR 202.U.4 & 5 and PAR 321.B.7 & 14.)

Ozone Depleting and/or Global Warming Compounds

Question/Issue: Will the revised rule regulate ozone depleting and global warming compounds?

Answer/Response: It is not the purpose of Rule 321 to regulate ozone depleting and global warming 

compounds. If such a compound is an ROC or TAC, Rule 321 will apply (unless the solvent is otherwise 

exempt from Rule 321). For an ozone depleting and global warming compound that is not an ROC or TAC, it 

will not be subject to Rule 321. For example, HFE-7100 (two isomers) is not an ROC or a TAC, but it is a 

global warming compound. The use of HFE-7100 in a vapor SCM will not be subject to Rule 321. However, 

the use of this compound in excess of one gallon per year per source will require a permit per PAR 202.D.10.l.l. 

If the state added HFE-7100 to the TAC list, the compound would become subject to Rule 321.

Question/Issue: The District is modifying Rule 321 to reduce ROC emissions. There is no mandate to reduce 

ozone depleting compounds (ODCs) in this project. Thus, the regulated community requests that the revised 

Rule 321 not have specific requirements to reduce emissions of ODCs.

Answer/Response: PAR 321 includes a new definition for solvent:

“Solvent” means any liquid containing any reactive organic compound or any toxic air contaminant, which 

is used as a diluent, thinner, dissolver, viscosity reducer, cleaning agent, drying agent, preservative, or other 

similar uses.

Rule 321 will regulate any ODCs that meet the definition of “solvent” unless otherwise exempted by the rule. 

However, there will not be any specific requirements applicable to only ODCs.

Question/Issue: The regulated community requests that the District not include global warming compounds 

(e.g., hydrofluorocarbons and perfluorocarbons) in the rulemaking effort.

Answer/Response: The Rule 321 project is not specifically targeting global warming compounds or

implementing requirements specific to these compounds. Any solvent containing a greenhouse gas that is not a 

toxic air contaminant and not an ROC (i.e., is listed as an “exempt compound” in the Rule 102 definition of 

“reactive organic compound”) will be exempt from Rule 321 by Section B.1.

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STAFF REPORT - Rule 321 Page I-10

September 20, 2010

Santa Barbara County APCD

Exemptions and Definitions

Question/Issue: Ensure the revised rule clearly exempts (and defines) specific operations (e.g., Semiconductor, 

Aerospace). High volatility solvent cleaning, with isopropyl alcohol, toluene, methyl alcohol, etc. is required to 

prevent rust formation or other microscopic contamination.

Answer/Response: PAR 321.B.22 provides an exemption for some semiconductor manufacturing processes 

that need to use high ROC solvents like n-methyl-2-pyrrolidone (NMP). Stripping of photoresist is considered 

exempt per PAR 321, Section B.4. The District needs to regulate most of the processes involved in 

semiconductor manufacturing in lieu of adopting a separate semiconductor rule.

Section C includes definitions for “semiconductor manufacturing,” “aerospace vehicle,” “aerospace vehicle 

component,” “space vehicle,” “and “space vehicle component.” 

The portions of Rule 321 that will apply to the cleaning of the aerospace vehicles, their components, and 

satellites will allow the use of the aforementioned solvents.

Request to Exempt Isopropyl Alcohol

Question/Issue: Isopropyl alcohol should be exempt from Rule 321 when used in solvent wipe cleaning.

Answer/Response: We disagree. No air district with a solvent cleaning rule has exempted IPA solvent cleaning 

from their rules. To do so would be inconsistent with the mandate to adopt every feasible measure. Further, 

IPA is a reactive organic compound that is also a toxic air contaminant. Thus, the proposed amended Rule 321 

requirements will apply when IPA is used in solvent cleaning machines and solvent cleaning. 

Question/Issue: Isopropyl alcohol is a non-photochemically reactive solvent. Per Rule 317, sources may use up 

to 3,000 pounds (or 430 gallons per day) of isopropyl alcohol before implementing add-on control equipment. 

The District should exempt IPA from all of the PAR 321 requirements.

Answer/Response: IPA is not a “photochemically reactive solvent,” but it is a “reactive organic compound.” It 

is also a toxic air contaminant. Unlike Rule 317, PAR 321 will apply to materials that are classified as an ROC, 

TAC, or both. Thus, the proposed amended Rule 321 requirements will apply when IPA is used in solvent 

cleaning machines or when performing solvent cleaning. 

Request to Exempt Small Containers (e.g., One Liter) from Rule 321 Solvent Cleaning Requirements

Question/Issue: PAR 321 should exempt containers having a capacity of one liter or less in volume; including 

containers that are filled on site using industry approved pumps and aerosol products.

Answer/Response: The PAR 321 Sections B.9 and B.11.b provide partial rule exemptions for the use of aerosol 

products and small containers (e.g., spray bottles, squirt bottles, and other containers having a capacity of one 

liter or less). However, depending on the category, some solvent cleaning activities using such containers will 

need to use low-ROC materials.

Loss of Rule 321 Exemptions

Question/Issue: Why is the District deleting the current Rule 321.B.4.f exemption for small sealed degreasers? 

Answer/Response: The District proposes to delete the 10 gallons capacity enclosed solvent cleaner exemption 

because the revised rule will govern airless and air-tight solvent cleaning machines. Making such enclosed 

solvent cleaners subject to Rule 321 is consistent with approaches used by other air districts and the mandate to 

implement every feasible measure.

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STAFF REPORT - Rule 321 Page I-11

September 20, 2010

Santa Barbara County APCD

Question/Issue: Why is the District removing the Rule 321 exemptions in Sections B.2.a and b for solvent 

cleaning machines with a capacity of one gallon or less or a surface area of less than one square foot? 

Answer/Response: The current Rule 321.B.2.a and b exemptions need to be removed for 1) consistency with 

the revised applicability provision, 2) to make the new solvent cleaning requirements applicable, and 3) to make 

the revised SCM requirements applicable. 

Use of a solvent with a container that has one gallon capacity or less is considered to be “solvent cleaning.” 

This is clarified in the new Rule 102 definition of “solvent cleaning machine,” which indicates: “. . . Buckets,

pails, and beakers with capacities of 3.785 liters (1.00 gallon) or less are not considered solvent cleaning 

machines. However, the use of such a container or similar containers (e.g., hand-held spray bottles) with a 

liquid solvent for cleaning is considered to be solvent cleaning . . .” There are many new provisions in the PAR 

321 that will apply to solvent cleaning that would otherwise be exempt from the rule if the 321.B.2.a exemption 

was not removed.

The removal of the “less than one square foot evaporative surface area” exemption is needed because the 

revised Rule 321 provisions will apply to degreasers that were previously exempt. For example, the sink-on-adrum cleaners (remote reservoir SCMs) will need to meet the 50 g/l and other Rule 321 requirements, unless 

they are subject to an applicable exemption.

Request to Exempt Paint Clean-Up Operations that Use Solvents

Question/Issue: The cleaning of paint clean-up operations should be exempt.

Answer/Response: The District disagrees that the cleaning of application equipment should be exempt. Similar 

to requirements in other air districts, PAR 321.M.3 will require the use an enclosed system (or equivalent) when 

using a solvent with an ROC content of greater than 50 grams per liter to clean spray application equipment. 

Compounds that are Classified as being both a “Toxic Air Contaminant” and a “Non-Reactive Organic Compound”

Question/Issue: What compounds are classified as being both a toxic air contaminant and a non-reactive 

organic compound? When these compounds are used in concentrations exceeding two percent, the PAR 

321.B.1 exemption will not apply (i.e., the PAR 321.B.1.b gatekeeper would be exceeded).

Answer/Response: To date, the District has identified six compounds that fall into this category:

1. tert-butyl acetate (t-BAc), CAS Number: 540-88-5

2. methylene chloride (METH), dichloromethane (DCM), CAS Number: 75-09-2

3. perchloroethylene (PERC), tetrachloroethylene, CAS Number: 127-18-4

4. 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113), CAS Number: 76-13-1

5. 1,1,1-trichloroethane (TCA); methyl chloroform, CAS Number: 71-55-6

6. trichlorofluoromethane (CFC-11), CAS Number: 75-69-4

This list may change due to additional compounds being identified or additions to 1) the TAC list and/or 2) the 

Rule 102 ROC definition's “exempt compound” list.

Methods for Determining a Solvent's ROC Content

Question/Issue: Will the District require that a solvent user have a U.S.EPA Method 24 test done to determine 

the ROC content of a solvent or will the VOC data from a material safety data sheet (MSDS) be sufficient?

Answer/Response: If the solvent manufacturer based the VOC data in their MSDS on a U.S.EPA Method 24 

test, the District will not require the users to have a test performed. (Some MSDSs specify that the VOC data is 

based on U.S.EPA Method 24.) 

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STAFF REPORT - Rule 321 Page I-12

September 20, 2010

Santa Barbara County APCD

Another approach to verifying ROC content involves PAR 321.P.7, which will permit the identification of 

solvent components by manufacturer's formulation data (or ASTM International methods). Staff could 

determine the ROC content by using the manufacturer's formulation data coupled with solvent density data 

published in an acceptable reference document. This approach should be viable when the solvent in question is 

comprised of only one compound that is known to be an ROC.

If the manufacturer's formulation data approach is not feasible or the basis for the MSDS VOC data is in doubt 

or the accuracy of the manufacturer's data is questionable, the District may require solvent users to obtain 

U.S.EPA Method 24 results. 

“Stripping” Exemption

Question/Issue: On PAR 321.B.4, can a source use this exemption to strip cured sealants?

Answer/Response: Yes, we changed the text to include “cured sealants.”

Removing Cured or Partially Cured Silicone from Production Equipment (e.g., Wooden Stirring Spoons)

Question/Issue: Under the PAR 321 requirements, will sources be allowed to use xylene and IPA to break apart 

the bonds of silicone that are partially or completely cured?

Answer/Response: Yes, the PAR 321.M.1 Table 1 limits will allow the cleaning of partially cured silicone:

1. Associated with maintenance and/or repair cleaning associated with the manufacturing of silicone, 

electronic, and/or medical devices, or

2. From tools, equipment, and machinery involved with the manufacturing of silicone, electronic, and/or 

medical devices. 

Xylene and IPA both have ROC contents below 900 grams per liter (g/l). This limit is being proposed in Rule 

321, Section M.1. The PAR 321.B.8.exemption provides a similar 900 g/l limit for SCMs when performing 

such cleaning described in items 1 and 2 above.

The removal of completely cured silicone is considered to be “stripping,” which is exempt by PAR 321.B.4. 

Rule 102 provides definitions that may help clarify these terms and requirements too:

“Coating” means a material applied onto or impregnated into a substrate for protective, decorative, or 

functional purposes. Such materials include, but are not limited to, paints, varnishes, sealers, and stains.

“Cured Adhesive, Cured Coating, or Cured Ink” means an adhesive, coating, or ink that is dry to the 

touch.

“Stripping” means the use of solvent to remove materials such as cured adhesives, cured inks, cured 

sealants, cured or dried paints, cured or dried paint residues, or temporary protective coatings.

Exemption for Stripping Cured Coatings, etc.

Question/Issue: The provisions of the proposed rule should not apply to stripping of cured coatings, cured 

adhesives, and cured inks.

Answer/Response: We concur; PAR 321, Section B.4 provides an exemption from stripping cured coatings, 

cured adhesives, and cured inks, except when removing cured materials from spray application equipment. 

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STAFF REPORT - Rule 321 Page I-13

September 20, 2010

Santa Barbara County APCD

Exemptions for Solvent Cleaning Subject to Other District Rules

Question/Issue: PAR 321 should provide exemptions for any cleaning operations that are subject to other 

District rules. The SJVUAPCD and VCAPCD rules provide such exemptions.

Answer/Response: PAR 321.B.6 provides such exemptions. 

ROC Limits for Batch Solvent Cleaning Machines Cleaning Electro-Optical Devices

Question/Issue: The PAR 321 should allow the use of solvents, such as isopropyl alcohol and 

cyclohexane/isopropyl alcohol mixtures, that have ROC contents greater than 50 g/l in batch SCMs, as required 

by government contracts for 1) electro-optical devices used in the aircraft decoys and satellites, and 2) high 

precision optics designed to sense, detect, or transmit light energy.

Answer/Response: Batch solvent cleaning machines used to clean high-precision optics will be allowed to use 

such solvents per the PAR 321.B.8 exemption. 

Exemption from Sections H.7, I.7, and K.6

Question/Issue: Does PAR 321.B.8.d exempt all of Sections H, I, and K, or only the effective date?

Answer/Response: This paragraph exempts qualifying SCMs from the solvent ROC content limit (50 g/l or 

less). The other provisions of Section H, I, and K need to be met. The requirement for the solvent to have a 50 

g/l of ROC content or less is within each of the referenced sections: H.7, I.7, and K.6. Operators of SCMs not 

eligible for the PAR 321.B.8 exemption will need to comply with the solvent ROC limit of 50 g/l or less by the 

effective date, which will be one year from the date the Board adopts the rule.

Specific Exemptions from the ROC Limits for Highly Technical and/or Precision Equipment Cleaning

Question/Issue: The cleaning of solar cells, fluid systems, avionic equipment, laser optics, telescopes, and 

microscopes should be exempt from Rule 321 requirements.

Answer/Response: The District has provided exemptions from the Rule 321 ROC limits in PAR 321.B.8.a for 

these items. The revised text indicates: 

Cleaning of solar cells, laser hardware, scientific instruments, high-precision optics, telescopes, 

microscopes, avionic equipment, and aerospace and military fluid systems.

Question/Issue: The PAR 321.B.8.a exemption includes scientific instrument, but the definition of “scientific 

instrument” does not include telescopes and microscopes.

Answer/Response: Staff added microscopes and telescopes into the Rule 321.B.8.a exemption list. 

Analytical Equipment Exemption

Question/Issue: The use of solvents to 1) clean laboratory equipment, and 2) dilute (“cut”) samples during a 

laboratory analysis should be exempt.

Answer/Response: PAR 321.B.8.b provides an exemption from the rules‟ ROC content limits for cleaning in 

laboratory tests and analyses. And Section B.19 provides an exemption when using a solvent as a diluent (cut).

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STAFF REPORT - Rule 321 Page I-14

September 20, 2010

Santa Barbara County APCD

Request to Exempt Research and Development Programs from Solvent ROC-Content Limits

Question/Issue: PAR 321 should include an exemption from the rule's solvent ROC-content limits for research 

and development (R & D) programs.

Answer/Response: The District added such a provision for short-term (less than 2 years) R & D programs in 

PAR 321.B.8.b.

Aerosol Solvent Exemption

Question/Issue: Rule 321 should include an exemption for the use of small quantities of aerosol solvents and 

the threshold should be on a facility basis.

Answer/Response: The proposed amended Rule 321, Section B.9, includes a partial exemption for aerosol 

products. The exemption's upper usage rate limit is 160 ounces per day per facility.

Exemptions/Requirements for Squeeze Bottles, Beakers, and Solvent Containers Having 1 Gallon Capacity or Less

Question/Issue: Use of squeeze bottles, beakers, and bench scale solvent containers are critical to our 

manufacturing operations. What exemptions and/or requirements in the PAR 321 will apply to their use?

Answer/Response: The PAR 321 Sections B.9 and B.11.b provide partial rule exemptions for the use of small 

containers. However, such solvent cleaning activities using small containers will need to comply with the PAR 

321.M.1, Table 1, ROC limits, which may require use of low-ROC materials depending on the cleaning 

category. Also, the PAR 321.D, M.2, R, and possibly S provisions apply. If the container has a capacity greater 

than 1 gallon, the operation qualifies as using a “solvent cleaning machine,” per the PAR 102 definition for this 

term. 

There Should be No ROC Limits When Cleaning Application Equipment Associated with Satellite Coatings and 

Radiation-Effect Coatings

Question/Issue: The PAR 321 ROC limits should not apply when cleaning application equipment used in:

1. satellite coating operations, and

2. radiation-effect coating operations.

Answer/Response: The PAR 321.B.10 includes such exemptions.

Exemption for Wipe Cleaning at Health Care Facilities, etc.

Question/Issue: Does Rule 321.B.14 apply to veterinary clinics/hospitals?

Answer/Response: Yes. The text indicates, “ . . . hospital, clinics . . . ” and the intent is to include all of them. 

Exemption from the Solvent Cleaning ROC-Content Limits for Sources Using 55 Gallons of Solvent per Year or 

Less

Question/Issue: Will the revised Rule 321 provide an exemption from the solvent cleaning ROC content limits 

for sources using 55 gallons of solvent per year or less? 

Answer/Response: Yes, such sources will not be subject to the PAR 321.M.1, Table 1 limits (per PAR 

321.B.15). Solvents with a reactive organic compound content of 50 g/l of material or less will not count 

towards the 55 gallons per year aggregate limit. However, the “good housekeeping” requirements of Section D 

and the provisions in Sections M.2, 3, R.2, R.3, and possibly S will apply to sources exempt by Section B.15.

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STAFF REPORT - Rule 321 Page I-15

September 20, 2010

Santa Barbara County APCD

Solvent Cleaning Exemption for Offshore Oil and Gas Platforms

Question/Issue: Requiring wipe cleaning solvents to have a low ROC content for solvent cleaning on offshore 

oil and gas platforms will create wastewater quality discharge issues.

Answer/Response: The District added an exemption (Rule 321, Section B.16.g) to address this concern. This 

new exemption limits the solvent ROC content to 800 g/l and the solvent ROC composite partial pressure to no 

greater than 8 mm of Hg at 20 °C when performing wipe cleaning on offshore platforms. Mineral spirits are 

available that will comply with the ROC content and pressure limits. Exemptions in PAR 321.B.6 may also 

apply.

Cleaning of Vacuum Chambers

Question/Issue: What are the requirements when wiping down vacuum chambers with n-methyl-2-pyrrolidone 

(NMP) solvent?

Answer/Response: The cleaning of vacuum chambers should qualify for the PAR 321.B.22 exemption, which 

provides an exemption for some manufacturing and maintenance processes that need to use NMP solvent.

Suggested Changes to the Definition of “Electronic Components”

Question/Issue: Ensure that the revised rule definition of “electronic components” is broad (e.g., includes 

semiconductor, charged coupled devices, thermal electric coolers, etc.). Also, include clarification in the rule's 

support document of what is meant by the definition's text “except for the actual cabinet in which the 

components are housed.” 

Answer/Response: Staff has worked closely with the regulated community to expand the definition of 

“electronic components” to ensure that it is sufficiently broad. 

The definitions of “Electrical Apparatus Components” and “Electronic Components” both include the phrase, 

“except for the actual cabinet in which the components are housed.” The intent is to allow manufacturers of 

electrical apparatus and/or electronic components to use solvents with high ROC contents (up to 900 g/l), but 

require the use of low-ROC solvents when cleaning the final cabinet in which the completed components are 

installed. However, for equipment requiring a high degree of cleanliness (e.g., components and devices 

manufactured and/or assembled in clean rooms), Rule 321.B.8 allows the use of high-ROC content solvents.

Gas Turbine Engine Cleaning

Question/Issue: What provisions of Rule 321 apply to the cleaning of internal parts of a gas turbine engine?

Answer/Response: Equipment used in the cleaning of gas turbine engines is considered to be a “Gas-Path 

Solvent Cleaner,” as defined in PAR 321, Section C. Rule 321 provisions will not apply if the solvent is 

exempt by Rule 321.B.1. It is the District's understanding that these operations use solvents that have an ROC 

content less than 2 percent, by weight. 

If the operation is not exempt from Rule 321, then the following Rule 321 sections apply:

1. D, General Operating Requirements,

2. F, Additional Operating Requirements for Gas-Path Solvent Cleaners, and

3. G, General Equipment Requirements for Solvent Cleaning Machines.

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STAFF REPORT - Rule 321 Page I-16

September 20, 2010

Santa Barbara County APCD

Definition of “Medical Device”

Question/Issue: Should the definition of “medical device” include the raw materials used to manufacture 

medical devices like the definition of “aerospace vehicle component” has?

Answer/Response: Yes, we believe it should. Thus, the District revised the definition to include such text. 

Definition of “Solvent” Including Toxic Air Contaminants (TACs)

Question/Issue: Why is the District including TACs in the project?

Answer/Response: The District wants Rule 321 to apply to non-ROC solvent such as methylene chloride and 

other TAC solvents not covered by a MACT (NESHAP). Staff has seen that the adoption of some new and 

revised rules for reducing ROC emissions could have the tendency to increase TAC emissions. For example, 

coating manufacturers complying with ROC limits may replaced an ROC solvent in a coating with a material 

that is classified as both a non-ROC and TAC. By including TACs in the solvent definition, there should not be 

a significant increase in TAC emissions from the revised Rule 321.

Question/Issue: This rule is being promulgated in response to an ROC control measure, not as a toxic air 

contaminant control measure. If the District wants to regulate TAC solvents, CARB or the District should first 

develop an air toxic control measure. The regulated community is requesting that TAC be taken out of the 

solvent definition.

Answer/Response: Including TACs in the project will: 1) allow TAC solvents to be controlled by Rule 321, 

which is consistent with the District‟s mission to protect public health, 2) provide a method to deter TAC 

increases, 3) give sources incentives to reduce TAC emissions by using airless/air-tight SCMs or alternative 

solvents, and 4) be consistent with CEQA documents on the control measure.

Question/Issue: In the draft Background Paper, Appendix K, under the industry impacts from Rule 102, it 

indicates that there are no impacts from the new definitions. If there are no impacts from including TACs in the 

project, why have it? The District needs to either change Appendix K to say yes there are some impacts (e.g., a 

health risk assessment may be triggered) or take TACs out. 

Answer/Response: The addition of the TAC text to the solvent definition is not changing our permitting review

process. Thus, there will be no effect on when TAC screening and/or when health risk assessments will be 

done. The District has updated the Background Paper‟s Appendix K to reflect some of the other potential 

impacts due to changing the solvent definition and the Rule 202 changes.

Question/Issue: Some of the members of the regulated community do not believe the District has the authority 

to control TAC solvents as proposed in this rulemaking effort.

Answer/Response: Air districts have a long-standing authority to regulate toxic air contaminants.

Question/Issue: Have other air districts regulated toxic air contaminants through their solvent cleaning machine 

and/or solvent cleaning rules?

Answer/Response: Other air districts have not been as explicit on regulating TACs as the District‟s proposed 

approach. 

In SC Rule 1122, Solvent Degreasing, the applicability section indicates that the rule applies to SCMs that carry 

out solvent degreasing operations with a VOC solvent or a NESHAPs halogenated solvent.

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STAFF REPORT - Rule 321 Page I-17

September 20, 2010

Santa Barbara County APCD

SC Rule 1171, Solvent Cleaning Operations, Section (a) indicates that the purpose of the rule is to reduce 

volatile organic compounds, toxic air contaminants, and ozone-depleting or global warming compounds from 

the use, storage and disposal of solvent cleaning materials in solvent cleaning operations and activities.

The state prohibited the use of several TACs in recent modifications to the state Consumer Product regulation 

on multi-purpose solvent and paint thinner products. 

Request for a Definition of and Provisions for “Solvent Cleaning Stations”

Question/Issue: The PAR 321 should include a definition of “solvent cleaning stations” and provisions for them 

similar to those found in the South Coast AQMD Rule 1164, Semiconductor Manufacturing. This definition 

indicates: “SOLVENT CLEANING STATIONS is a workplace equipped to remove surface contaminants 

using a liquid or vapor solvent containing volatile organic compounds.”

Answer/Response: The District disagrees. Adding such a definition could cause confusion over when a solvent 

cleaning machine is employed and when solvent cleaning is being performed. The new definitions in PAR 102 

and the PAR 321 provide clear delineations for these two terms and the requirements that apply to them. 

Change in the Method for Determining the Contact Location of the Solvent/Air Interface for Vapor SCMs

Question/Issue: The current air-vapor interface (solvent/air interface in PAR 321) definition indicates that the 

effective top of the vapor layer may be determined as the maximum height where condensation occurs on a cold 

metal object lowered into the vapor zone. Under PAR 321, the location of contact is defined as the mid-line 

height of the primary condenser coils. What is the basis for this change?

Answer/Response: The District is modeling the Rule 321 project SCM terms and definitions on those found in 

40 CFR, Part 63, Subpart T, National Emission Standards for Halogenated Solvent Cleaning. Staff prefers the 

mid-line height basis for determining the location of contact of the solvent/air interface because it is easier to 

determine and it is consistent with the federal provisions. It should be noted that this change may affect the 

freeboard ratio figure. For additional information see “Requirement for Vapor SCMs to Have a Freeboard 

Ratio of 1.0,” page I-23.

Level of Stringency of the PAR 321 Requirements

Question/Issue: The District proposes to modify Rule 321 using solvent rules in the South Coast AQMD and 

San Joaquin Valley Unified APCD as models. However, these areas have extreme non-attainment status, while 

Santa Barbara County has federal maintenance attainment status. In light of this situation, the District should 

use rules adopted before 1999 as the models for the current PAR 321.

Answer/Response: The District modeled the proposed revised requirements for solvent cleaning machines on 

South Coast (SC) Rule 1122, as adopted on July 11, 1997. The proposed solvent cleaning requirements are 

modeled on a combination of rules: South Coast Rule 1171, as adopted on October 8, 1999, and SJV Rule 

4663, as adopted on December 20, 2001. Staff also considered and added exemption provisions from the 

Ventura County APCD solvent rules. 

Santa Barbara County is nonattainment for the state ozone standard and the proposed amended Rule 321 

requirements are consistent with the state requirement to adopt every feasible measure.

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STAFF REPORT - Rule 321 Page I-18

September 20, 2010

Santa Barbara County APCD

Inspection and Maintenance Plan Not Required for Solvent Cleaning Machines

Question/Issue: Will the proposed amended rules require sources to have inspection and maintenance (I & M) 

plans to monitor operations of remote reservoir solvent cleaning machines?

Answer/Response: No, PAR 321 does not include any provisions for I & M plans. 

Enforcement of the New ROC-Limits

Question/Issue: How will the District enforce the requirement to use low-ROC solvents, especially at 

unpermitted facilities like auto repair shops?

Answer/Response: We have a county-wide surveillance program, where we are visiting all facilities, permitted 

and unpermitted, that may have emissions. Through this surveillance program we determine compliance with 

permit requirements and with Rule 321 provisions. Regarding the use of low-ROC solvents, a vendor (SafetyKleen) indicated to us that they will ensure that the equipment they service complies with the revised Rule 321 

requirements.

Requirements for Remote Reservoir Cleaners that Were Previously Exempt from Rule 321

Question/Issue: What requirements will apply to the sink-on-a-drum units under the PAR 321? These have 

typically been exempt by the Rule 321.B.2.b one square foot exemption, which is being deleted.

Answer/Response: If a sink-on-a-drum (remote reservoir) SCM is not exempt by a provision in Rule 321.B, 

such unit will be subject to:

1. Section D, General Operating Requirements,

2. Section G, General Equipment Requirements for Solvent Cleaning Machines, 

3. Section H, Additional Equipment Requirements for Remote Reservoir Cold Cleaning Machines (includes 

the requirement to use a solvent with an ROC content of 50 g/l or less),

4. Section I, Additional Equipment Requirements for Batch Cold Cleaning Machines.a

5. Section R, Recordkeeping Requirements,

6. Section S, Reporting Requirements,band

7. Section T, Compliance Schedule.

Question/Issue: What Rule 321 requirements may be a challenge or difficult for these units to meet?

Answer/Response: The PAR 321.H.5 provision may be triggered, which would require dimensions such that 

the freeboard ratio is 0.75 or greater. This could occur if the solvent employed is a high volatility solvent 

(Safety Kleen 105 is a high volatility solvent unless its temperature is never at 98 oF or higher). 

A source may eliminate the need to meet the 0.75 freeboard ratio requirement by switching to a low volatility 

solvent. Such a solvent may be an aqueous- or detergent-type cleaning agent or a solvent with an ROC content 

of 50 g/l or less. For SCMs that were previously exempt, PAR 321.T.2.b.3 provides a deadline of 365 days 

from the rule amendment date for sources to comply with the Section H provisions.

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a

Section I applies if the solvent container is accessible for dipping or soaking parts.

b Annual reporting applies if the remote reservoir SCM is subject to a Permit to Operate.
STAFF REPORT - Rule 321 Page I-19

September 20, 2010

Santa Barbara County APCD

CEQA Analysis for the Rule 321 Project‟s “Closed Container” Requirement

Question/Issue: The California Environmental Quality Act (CEQA) analysis for the Rule 321 project needs to 

assess the increased generation of hazardous waste as a result of the proposed closed container requirement.

This analysis should include the secondary emissions generated by the transportation of this hazardous waste 

material to approved waste collection sites. For example, existing District rules do not prohibit the air drying of 

rags during miscellaneous wipe solvent operations. The proposed rule would eliminate this practice, resulting 

in the generation of a new hazardous waste stream. 

Answer/Response: The District does not foresee that there will be any unmitigated significant CEQA issues. 

The proposed equipment designs, limits, and operating requirements in PAR 321 have been established in many 

other California air districts.

Meaning of “Tight-Fitting Cover”

Question/Issue: In PAR 321.D.1, what does “tight-fitting cover” mean?

Answer/Response: A top that is made specifically for a container would typically be a tight-fitting cover. 

Something with a bunch of visible gaps would not be a tight-fitting cover. A tight-fitting cover is one that will 

stay on if bumped and is not easily knocked off. A cover that is too big for the top of the container and could 

easily be pushed off would not be a “tight fitting cover.” It doesn‟t have to be vapor-tight. 

Cover Requirements

Question/Issue: The existing requirement should be expanded to allow the removal of the cover for additional 

reasons (e.g., to perform monitoring, inspections, or repairs).

Answer/Response: The District revised the text to indicate that the covers shall not be removed or opened 

except to process work or perform monitoring, inspections, maintenance, or repairs that require the removal of 

the covers.

Use of Nitrogen Gas to Expedite Solvent Draining/Removal from Cleaned Parts

Question/Issue: Are operators that perform solvent cleaning (dip cleaning) allowed to direct a gentle nitrogen 

gas stream onto parts to expedite the draining of solvent from internal cavities and/or to dry residual solvent 

films? The process uses low pressure nitrogen gas where the solvent is not atomized and the solvent runoff is 

collected for solvent recovery or disposal.

Answer/Response: Yes, such a process is allowed without add-on control equipment under the provisions of 

Rule 321 Section D.9 and Section M.2.c because there is no solvent being atomized and the runoff solvent is 

collected accordingly.

Necessity of the Proposed New Housekeeping Requirements

Question/Issue: The District indicated that it modeled the new PAR 321.D.10 to 12 requirements on provisions 

in:

1. 40 CFR Part 63, Subpart T for NESHAP Halogenated Solvent Cleaning, and 

2. South Coast AQMD Rule 1122.

This rule should not address TACs; thus no Rule 321 requirements should be based on the federal regulation. In 

addition, the SCAQMD is a highly industrial air basin containing many more of these solvent sources, and that 

air basin is classified as extreme nonattainment of federal ozone air quality standards, whereas Santa Barbara 

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STAFF REPORT - Rule 321 Page I-20

September 20, 2010

Santa Barbara County APCD

County is in attainment of federal ozone attainment standards. Therefore, these new requirements need not be 

imposed upon sources within the jurisdiction of the SBCAPCD.

Answer/Response: The same “good housekeeping” techniques found within the federal regulation for reducing 

hazardous air pollutant emissions will also reduce ROC emissions. Also, using the provisions within SC 

solvent rules as models for the SBC solvent rule is consistent with the state requirement to adopt every feasible 

control techniques.

Enforcement of the Proposed New Housekeeping Requirements

Question/Issue: The new proposed housekeeping requirements in PAR 321.D could lead to increased costs for 

operators, increased recordkeeping and reporting requirements, and a greater potential for Notices of Violation 

during facility inspections. There is also a concern that these housekeeping requirements will be unequally 

enforced, because the SBCAPCD will not have the resources to inspect the unpermitted sources, beyond 

periodic inspections. Thus, we request the elimination of PAR 321, Sections 10 to 13.

Answer/Response: The District needs to include these requirements because they have been implemented in 

other air districts and they are necessary to meet the state requirement for the adoption of “every feasible

measure.” To provide equal enforcement, the District conducts surveillance of unpermitted SCMs. 

Looking at the PAR 321.D.10 - 13 housekeeping provisions individually:

321.D.10 - Requirement to Clean Up Solvent Spills This expands the existing Rule 321.D.1 provision, which 

indicates, “Solvent, including waste solvent, shall not be stored or disposed of in a manner that will cause or 

allow evaporation into the atmosphere.” It is similar to text in SC Rules 1122(c)(1)(L) and 1122(c)(2)(P) and

40CFR §63.462(c)(5). We believe that it a reasonable requirement that operators clean up solvent spills 

immediately when they occur.

321.D.11 - Solvent Levels are Not to Exceed the Fill Line This is an extension of the existing Rule 321.D.2 

provision, “The solvent cleaner . . . shall be installed, operated, and maintained in proper working order.” The 

District is proposing the same text found in SC Rule 1122(c)(1)(M) and 1122(c)(2)(Q). Preventing overfilling 

of SCMs will help to reduce spills and improve compliance with other requirements (e.g., maintaining the 

proper freeboard height/ratio, helping to avoid solvent splashing outside of the SCM).

321.D.12 - SCM Solvent Transfer Methods At the request of industry, the District modified the earlier text 

(which had been modeled on the 40 CFR §63.463(d)(8) provision). The currently proposed text is verbatim 

from SC Rule 1122(c)(1)(E). We believe it is reasonable to require this technique, which will help in reducing 

emissions from solvent transfers.

321.D.13 - Positioning Ventilation Fans This provision is virtually the same one found in current Rule 

321.G.10, SC Rule 1122(c)(1)(K), SC Rule 1122(c)(2)(N), and VC Rule 74.6.1.C.10. We cannot eliminate this 

provision as it is currently in the Rule 321, which U.S.EPA has incorporated into the State Implementation Plan.

Allowing Minimal Amounts of Solvent Atomization Without Emission Controls

Question/Issue: The rule should provide limited exemptions to 1) the solvent atomization prohibition, and 2) 

the requirement to employ add-on control equipment when atomizing solvent. 

Answer/Response: PAR 321.B.11 provisions provide exemptions from the solvent atomization prohibition for 

specific equipment and containers.

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STAFF REPORT - Rule 321 Page I-21

September 20, 2010

Santa Barbara County APCD

Transferring Solvent

Question/Issue: The PAR 321.D.12 (dated May 14, 2009) indicates that the solvent shall be transferred using 

threaded or other leakproof couplings. So, if you have a transfer pump, you can‟t put the pump in the bottom of 

the drum, because you don‟t have a threaded or leakproof coupling?

Answer/Response: The District revised this provision using text from the SC Rule 1122; the PAR 321.D.12 

provision now indicates:

Draining or filling solvent containers shall be performed at a level lower than the liquid solvent surface.

Question/Issue: How would solvent filling and draining per D.12 be applied to a small cleaning machine that 

has a small container? In my case, we have a tub containing about 2 - 3 gallons of solvent. We pour solvent 

into it from 1 gallon containers. And when we are finished we pour the solvent directly into the bulk storage 

drum. Filling another container to transport the solvent doesn‟t seem like it would result in any emission

decrease.

Answer/Response: Staff added an exemption in PAR 321.B.23 to cover such a scenario:

The solvent container draining and filling provisions in Section D.12 shall not apply to solvent transfers out 

of a sump, provided the sump has a maximum capacity of 8 gallons or less, such sump is easily removed

from the solvent cleaning machine, and the solvent is poured from the sump directly into a bulk storage 

container.

Question/Issue: Does the Rule 321.D.12 requirement apply to bulk solvent storage containers?

Answer/Response: No. The way Rule 321.D.12 is written it applies to solvent containers. And Rule 321 

defines solvent container as, “ . . . that part of the solvent cleaning machine that is intended to hold the cleaning 

solvent.” Hence, Rule 321.D.12 only applies to solvent containers that are integral to solvent cleaning 

machines.

Request to Eliminate Potentially Antiquated Parts of Rule 321

Question/Issue: There are unnecessary sections of PAR 321 that can be deleted.

Answer/Response: Although the Santa Barbara County APCD point source inventory may not include certain 

devices (e.g., gas-path cleaners, in-line SCMs, or cross-rod SCMs), they could be currently in use without being 

in the inventory due to their permit-exempt status. As shown in the Staff Report, Appendix L, Figure 1, Page L3, there are several permit exemptions that apply to such equipment. It is necessary to retain these SCM 

requirements for new units as well. For these reasons, the District is reluctant to remove requirements from the 

existing rule (which U.S.EPA has approved into the State Implementation Plan). 

PAR 321.H.7, I.7, & K.6 Sentence Structure

Question/Issue: The language after the effective date references in PAR 321 H.7, I.7, and K.6 appears 

incomplete.

Answer/Response: We reviewed the text in question and found that the sentence structure is correct. The intent 

is to require SCMs to be equipped with solvents having an ROC content of 50 g/l or less, effective one year 

from the date of the rule revision, unless a SCM is controlled by an emission control system meeting the 

requirements in Section N.

Using Section H.7 as an example, the proposed (abbreviated) text is: “Any person who . . . operates . . . any 

remote reservoir cold cleaning machine shall ensure that it is equipped with the following: . . . 7. . . . solvent 

that contains 50 grams of reactive organic compound per liter of material or less.”

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STAFF REPORT - Rule 321 Page I-22

September 20, 2010

Santa Barbara County APCD

The omitted text provides qualifiers on 1) when the 50 g/l requirement becomes effective and 2) how the use of 

add-on control equipment may be used in lieu of meeting the 50 g/l requirement. 

Aqueous Solvents Will Not Work for Many Solvent Applications

Question/Issue: For many solvent-cleaning operations, aqueous cleaners are functionally ineffective. 

Answer/Response: The proposed amended Rule 321 solvent ROC limits take into account the specific needs 

for the various industries. For electronic and medical device manufacturing and silicone manufacturing 

processes that require a higher degree of cleanliness, the rule will allow up to 900 grams of ROC per liter. 

Similar limits for the different types of facilities and processes have been successfully used in other air districts. 

Cleaning Electronic Components and Medical Devices with the IPA

Question/Issue: IPA should be allowed to be used when cleaning electronic components and medical devices.

Answer/Response: Such cleaning operations may be eligible for an exemption in Section B.8. If not, the 

Section M.1, Table 1, ROC limit is 900 g/l for these categories. IPA has an ROC content of 785 g/l in its purest 

form. Thus, undiluted IPA may be used under the proposed provisions for the aforementioned categories.

Making Certain Solvents Illegal

Question/Issue: This proposed rule would make certain hydrocarbon solvents illegal for use in wipe cleaning 

operations.

Answer/Response: That is true for solvent cleaning categories 1) not eligible to be exempt by a Section B 

provision (e.g., B.15 the 55 gallons per year exemption), or 2) that need to use solvents with a higher ROC 

content than the ones allowed in Section M.1, Table 1. The District is proposing to adopt solvent cleaning 

provisions that have been successfully implemented in other air districts. Further, where there is a need to use 

high-ROC solvents, we have included higher limits or an exemption in the rule.

Rule 321 Impacts

Question/Issue: Revised Rule 321 will impact businesses that are already operating under permit with the 

District. Effectively, the “reward” that businesses will receive for their years, and in many cases decades, of 

compliant operation and fee remittance is an outright ban on select materials (e.g., IPA) that are essential to 

performing the ordinary course business activities of their enterprises. The District can achieve the reduction in 

ozone precursors required by their Clean Air Plan by the adoption of other proposed rules.

Answer/Response: Some industries (e.g., automotive repair shops) that have not already switched over will see 

a positive impact to their operating costs from complying with the revised Rule 321 requirements. The change 

to aqueous- or detergent-type solvents has resulted in cost-savings in others regions where the control 

techniques have been implemented.

The District is not proposing to ban IPA (for more detail, see the response to the “Disclosure of Emission 

Inventory Data and Banning IPA” topic, under “321 - Support Data,” page I-27). The District's approach to 

regulating solvent cleaning is reasonable, consistent with the Clean Air Plan, and fulfills the requirement to 

adopt “every feasible measure.”

The District disagrees that the emission reductions from revising Rule 321 can be achieved through the adoption 

of other proposed control measures. The adoption of PAR 321 will achieve more than one-half a ton per day of 

ROC emission reductions. Those emission reductions exceed the combined emission reductions from all of the 

other proposed revised control measures listed in the 2007 CAP, Table 4-3.

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STAFF REPORT - Rule 321 Page I-23

September 20, 2010

Santa Barbara County APCD

Setting the General Solvent ROC-Content Limit at 50 or 25 Grams per Liter

Question/Issue: The project should be based on a “general solvent use” ROC-content limit of 50 g/l, not 25 g/l.

Answer/Response: When we first proposed the solvent rule changes in the 2001 Clean Air Plan, air district‟s 

with solvent cleaning requirements were setting the solvent limit for general use at 50 grams per liter. Although 

these air districts have since lowered the rules‟ ROC limits to 25 g/l for general solvent use, we will continue to 

propose the 50 g/l limit for this category as committed to in the 2001 CAP. And, we will be using earlier 

versions of the other air district rule requirements for establishing the ROC limits. 

ARB and U.S.EPA have recommended that the District revise the rules to have the 25 g/l cut-off. Therefore, a 

possibility exists that ARB and/or U.S.EPA will not approve the revised rule at the proposed ROC limits. 

PAR 321 and Interactions with Rules 322 and 324

Question/Issue: The District should examine the interaction between Rule 322, Metal Surface Coating Thinner 

and Reducer, and Rule 324, Disposal and Evaporation of Solvents, with the proposed revisions to Rule 321. 

Could Rules 322 and 324 be eliminated, as they appear to be redundant following the adoption of the proposed 

rule changes?

Answer/Response: No, the provisions in Rules 322 and 324 should not be repealed. There is no interaction or 

interdependency between the PAR 321 and the Rule 322 or Rule 324 requirements. Rules 322 and 324 are 

general umbrella- or catch-all-type rules that do not have any requirements specific to the use of solvent 

cleaning machines or provisions on solvent cleaning. Also, the PAR 321 will have limited applicability. Thus, 

a person disposing of a solvent not subject to the Rule 321 solvent disposal provisions would be subject to Rule 

324 requirements

PAR 321 and Interaction with Rule 317

Question/Issue: How will the requirements of Rule 317, Organic Solvents, interact with those in PAR 321? 

Answer/Response: Rule 317 is a general umbrella- or catch-all-type rule that applies to a wide range of sources 

and regulates “photochemically” and “nonphotochemically” reactive solvents. Rule 321 regulates “reactive 

organic compounds,” which includes a larger set of chemicals when compared to chemicals categorized as 

“photochemically reactive organic compounds.”

Sources subject to Rule 321 are required to comply with all other applicable SBCAPCD prohibitory rules 

(including Rule 317). The modified Rule 321 will have limits on the ROC content of solvents, but not daily 

limits on ROC emissions.

Solvent Cleaning Emissions that Have Been Offset and the Need to Comply with Prohibitory Rule Requirements

Question/Issue: A source performing solvent cleaning that has offset the emissions at a 1.2 to 1 ratio should not 

be required to comply with the revised Rule 321 requirements because the emissions have been fully mitigated.

Answer/Response: Such permitted solvent activities need to comply with the permit conditions and all 

applicable rules. If the revised Rule 321 requires use of solvents with lower-ROC contents for the solvent 

cleaning operation having emission offsets, then the ROC-content requirements need to be met. In such a case, 

the offset liability would be reduced and the permit holder could choose to revise the permit accordingly. 

Requirement for Vapor SCMs to Have a Freeboard Ratio of 1.0

Question/Issue: Under the PAR 321 requirements, will I need to increase the freeboard ratio in my vapor SCM 

to 1.0?

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STAFF REPORT - Rule 321 Page I-24

September 20, 2010

Santa Barbara County APCD

Answer/Response: Yes, if the SCM is subject to the PAR 321.J.8 or L.9 requirement and the SCM is not 

controlled by an emission control system complying with the Section N requirements. The deadline for 

complying with the increased freeboard ratio requirement will be one year from the date of rule adoption. 

It should be noted that the method for determining the solvent/air interface has been revised to be the mid-line 

height of the primary condenser coils. This change may affect the freeboard ratio figure. For additional 

information see “Change in the Method for Determining the Contact Location of the Solvent/Air Interface for 

Vapor SCMs,” page I-17.

Use of a Low Volatility or Partial Pressure Alternative

Question/Issue: It is recommended that solvent cleaning with low volatility solvents be addressed in the rule. 

As currently proposed the rule may encourage the use of higher volatility solvents with lower ROC content, 

resulting in higher overall emissions. (E.g., replacing toluene with propylene glycol monomethyl ether acetate 

[PGMEA]).

Answer/Response: Other air districts have moved away from having composite partial pressure provisions in 

their rules. We believe that they found those provisions unnecessary and that industry did not substitute higher 

volatility solvents to comply with the rule because their solvent rules provided adequate specific exemptions.

Cleaning of “Clean Rooms” and General Work Areas

Question/Issue: What will the ROC limit be for the cleaning of “clean rooms” and general work areas?

Answer/Response: Maintenance cleaning of “clean rooms” and general work areas associated with the 

manufacturing and/or repair activities involving electronics, medical devices, silicone manufacturing, or 

aerospace vehicles/payloads (and their components) will be limited to 900 g/l [PAR 321.M.1, Table 1, Cleaning 

Activities in (b)(ii) - (b)(iv) and (d)(iii)(II)]. The solvent ROC limit for “general” maintenance cleaning will be 

50 g/l [PAR 321.M.1, Table 1, Cleaning Activity (b)(i)]. The PAR 321 includes a definition for “maintenance 

cleaning.”

ROC Limits for Aerospace Solvent Cleaning

Question/Issue: What is the ROC solvent limit for solvent cleaning associated with aerospace applications in 

the proposed amended rule? All components of an assembly require the same high level of cleanliness to 

ensure all contaminants are removed. Under vacuum, any contamination, no matter how microscopic, may 

become loose or outgas causing system failure.

Answer/Response: 900 g/l per PAR 321.M.1, Table 1, Cleaning Activity (d), unless cleaning the coatings 

application equipment, in which case it is 950 g/l per the table's Cleaning Activity (c) limit.

Solvent ROC Content Limit When Cleaning Spray Application Equipment

Question/Issue: What is the solvent ROC content limit when cleaning spray application equipment under the 

proposed amended rule?

Answer/Response: For cleaning architectural coating application equipment, the Rule 321.B.2 upper exemption 

limit, is 950 g/l. The Section M.1, Table 1, also limits the ROC content to 950 g/l. 

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STAFF REPORT - Rule 321 Page I-25

September 20, 2010

Santa Barbara County APCD

ROC Limits When Performing Repair and Maintenance Cleaning of Electronic and Cleaning Coatings Application 

Equipment

Question/Issue: What are the PAR 321 solvent ROC-content limits for: 

1. electronic apparatus components & electronic components subject to repair or maintenance cleaning, and 

2. the cleaning of coatings application equipment?

Answer/Response: The limits in PAR 321, Section M.1, Table 1, for the repair cleaning and maintenance 

cleaning of electrical apparatus components and electronic components is 900 g/l. The limit for cleaning 

coatings application equipment is 950 g/l.

PAR 321.M.1 Table 1 Limits

Question/Issue: It is recommended that solvent cleaning with low volatility solvents outside of a machine be 

addressed in the amended rules.

Answer/Response: The early South Coast AQMD and San Joaquin Valley APCD solvent cleaning rules 

included an option to comply with composite partial pressure limits or ROC limits. However, their current rules 

have ROC limits with no option to comply with a composite partial pressure limit. It appears that those air 

districts amended their rules to provide only ROCs limit and have worked around the cases where use of highROC solvents is needed by providing specific exemptions. In a similar manner, we are also providing many 

specific exemptions.

Adding a Specific Category to PAR 321.M.1, Table 1, for “Silicone Manufacturing”

Question/Issue: Silicone manufacturing processes require the use of IPA. The raw silicone materials are used 

in many products including medical devices and electrical wire insulation, which require a high-degree of 

cleanliness. The District should provide ROC limits for silicone manufacturing that are equivalent to the limits 

for medical device manufacturing and electrical apparatus components & electronic components manufacturing.

Answer/Response: Agreed, the District added this category to the rule's Table 1, Cleaning Activities (a)(iv) and 

(b)(iv), with a 900 g/l limit. And we added a definition of silicone manufacturing in PAR 321.C.

Purging Operations

Question/Issue: PAR 321 should include allowances for purging operations using inert gases (e.g., nitrogen), 

air, and hydraulic fluid.

Answer/Response: The District has included solvent flow and flush method provisions in PAR 321.M.2.c for 

such operations. However, it should be noted that “degassing” operations subject to or specifically exempt from 

Rule 343 will be exempt from Rule 321 per proposed Section B.6.f. 

Purging operations involving inert gases or air that are used to purge a solvent with an ROC and a TAC 

concentration at two percent or less would be exempt per Rule 321.B.1. However, purging with air/inert gases 

to remove solvents not eligible for the Rule 321.B.1 exemption or purging with hydraulic fluid will need to 

comply with the PAR 321.M.2.c provisions. (Hydraulic fluid has an ROC content > 2 percent.)

Meaning of “Enclosed”

Question/Issue: Is there a definition of the word “enclosed”?

Answer/Response: No, however the Rule 321.M.3 text describes what an enclosed system will encompass. 

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Santa Barbara County APCD

Scope of the PAR 321.M.3 provisions and Omitting the Word “Spray” from the Rule 321 Definition of “Application 

Equipment”

Question/Issue: Does PAR 321.M.3 apply to solvent cleaning of all application equipment or just spray 

application equipment? Should the Rule 102 definition of “application equipment” be changed to “spray 

application equipment” to clarify that only spray application equipment is subject to the rules?

Answer/Response: The intent of the PAR 321.M.3 provision as originally written was to require the cleaning of 

spray application equipment with either low ROC-content solvent or with the use of an enclosed system. To 

clarify, the District added the word “spray” in the appropriate places.

On the suggestion to add “spray” to the PAR 102 “application equipment” term, we prefer not to make this 

addition. The definition of “application equipment” applies throughout the rulebook and needs to be more 

general so that it can apply to items such as printing presses, trowels, paint brushes, rollers, etc. (PAR 321.B.2 

also uses the term “application equipment” in several exemptions and Table 1.)

Methods for Determining Compliance with the PAR 321.N.6 Provision

Question/Issue: How will compliance with the PAR 321.N.6 provision be determined?

Answer/Response: In general, the District will determine compliance with this provision as part of the 

evaluation for the emission control system‟s Authority to Construct. During this evaluation, staff will calculate 

what the emissions would be 1) from the emission control system when a source uses specified quantities of 

non-complying solvents, and 2) if the source used the same quantities of complying solvents. If the calculated 

emission rate with a control system is less than the rate using uncontrolled complying solvents, then the project 

would comply with the PAR 321.N.6 requirement.

After the equipment is constructed, source tests of the emission control system‟s overall efficiency may be used 

in combination with usage records and calculations to verify compliance with the Section N.6 provision. Later 

compliance determinations (e.g., those associated with routine inspections and/or permit reevaluations) will 

include calculations for determining the theoretical emissions if complying solvents were used and the actual 

emissions from the control system. The actual controlled emission may be determined from usage records, 

solvent ROC contents, and new and/or historical source test results on the overall emission control system‟s 

efficiency. 

Increased Recordkeeping Provisions

Question/Issue: PAR 321.R.1.b.3 requires sources performing solvent cleaning to record the amount of solvent 

used for each type of cleaning activity specified in Table 1. Businesses will need to modify recordkeeping to 

classify each cleaning activity, which will increase efforts related to recordkeeping with little benefit or 

reducing actual emissions to the atmosphere.

Answer/Response: Additional recordkeeping requirements are needed to provide a method for demonstrating 

and verifying that the higher-ROC solvents are used appropriately. The proposed revised recordkeeping 

provisions are similar to those found in other air district solvent cleaning rules. Industry has indicated that a 

need exists to allow the use of higher ROC-content solvents for various types of cleaning activities. We believe 

that the regulated community finds the additional recordkeeping costs an acceptable tradeoff so that they have 

available higher ROC limits for specific solvent cleaning activities. 

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STAFF REPORT - Rule 321 Page I-27

September 20, 2010

Santa Barbara County APCD

Use of Blended/Mixed Solvents

Question/Issue: The rule needs to provide a method for solvent users to specify the “as-applied” solvent ROC 

content especially when they perform on site blending of solvents or prepare aqueous solvent from concentrate. 

Requiring businesses to buy solvents premixed, rather than separate, would only add to costs rather than reduce 

solvent emissions to the atmosphere.

Answer/Response: Section R.1.b.5 allows solvent users to determine solvent “as-applied” ROC content at the 

time of application. Sources may wish to obtain the District's approval of the mix ratio recordkeeping practices 

and ROC calculation method to ensure compliance with the Rule 321.R.1.b.5 provisions. Nothing in PAR 321 

prohibits the mixing of solvents, provided the applicable ROC-content limits and other rule requirements (e.g., 

Section R.1.b.5) are met.

Disclosure of Emission Inventory Data and Banning IPA

Question/Issue: The District should provide data on emission sources impacting our local air regardless of 

business class. In order for the District's Community Advisory Council, the District Board, and the general 

public to make an informed decision regarding a ban on IPA use in our County, they should rightly be provided 

full disclosure of the stationary sources currently allowed to operate without permits.

Answer/Response: The District has provided the public with data on emissions that impact the local air quality 

in our Clean Air Plans. The 2007 CAP, Section 3, provides emission inventory data. Table 3-1 breaks down 

the ROC emissions for different categories (e.g. laundering, degreasing, etc). In addition, the District has 

included tables in the Rule 321 Staff Report, Appendix G, page G-4, that provide percentage breakdowns on 

solvent emissions from different emission categories and industry types. 

Staff prefers not to characterize any of the PAR 321 requirements as “banning” any particular compound. 

While certain parts of PAR 321 will limit a solvent‟s ROC content, there are many exceptions being built into 

the rule. Proposed amended Rule 321.H.7, I.7, and K.6 include solvent ROC content limits for certain solvent 

cleaning machines (assuming they are not exempt by a provision in PAR 321.B). Also, PAR 321.M.1 includes 

solvent ROC limits for certain operations, many of which are higher than the ROC content for undiluted IPA. 

By providing flexibility to specific industry operations while adopting proven solvent emission reduction 

techniques, the District will meet the state requirement to adopt “every feasible measure.” 

Request for a Summary that Compares the Emissions Contribution for all Sources of Solvent Emissions

Question/Issue: The regulated community would like a comparison to others solvent users that need to control 

emissions. There should be a breakdown in percentages of medical device manufacturing, pharmaceutical, 

electronic device manufacturing, aerospace, and then the CAC, when we look at it, can see how much we are 

contributing to the emissions versus these two classes (hospitals and janitorial) that are being exempted.

Answer/Response: These summaries are provided in the Staff Report, Appendix G, page G-5, Tables 3 and 4.

Emission Reduction Calculations

Question/Issue: Some of us would like to see the calculations that support Table 1 in Appendix G.

Answer/Response: A document that details the emission calculation method is available from the District upon 

request.

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September 20, 2010

Santa Barbara County APCD

Emission Reduction Estimates

Question/Issue: The numbers in the Background Paper are different (higher) from the ones shown in the Clean 

Air Plan.

Answer/Response: The emission reductions are actually lower. The District overestimated the emission 

reductions in the 2007 CAP. The Staff Report (Appendix G, Table 2, page G-3) provides a table to show the 

comparison of the emission reductions from the 2007 CAP analysis and the current rulemaking activity.

Emission Reductions from Hospitals, Janitorial, and Autobody Shops

Question/Issue: How much of the emission reductions are associated with hospitals and janitorial and autobody 

shops?

Answer/Response: There are no emission reductions anticipated for hospitals and janitorial solvent use due to 

their exempt status. For autobody shops, which are not included in the PAR 321 project, the 2008 rulemaking 

action indicated that the revised Rule 339 solvent requirements would achieve emission reductions of:

0.0096 TPD (2.50 TPY) in 2015, and 

0.0102 TPD (2.65 TPY) in 2020

Unspecified ARB Area Source Categories

Question/Issue: The regulated community would also like to get more information (descriptions) on what goes 

into the “unspecified” categories.

Answer/Response: A document that provides information on this subject is available from the District upon 

request.

Emission Reductions from Auto Repair Shops 

Question/Issue: What emission reductions are anticipated from the auto repair shops?

Answer/Response: Assuming 75 percent of the CES 83659 (EIC 220-204-0500-0000) emissions (109.84 tons 

per year) are associated with remote reservoir cleaners at auto repair shops, the PAR 321 ROC emission 

reductions will be:

0.2257 TPD (82.38 TPY) in 2015 and 2020.

Basis for Calculating Emissions from Hospitals and Janitorial Services

Question/Issue: I don‟t like the methodology that calculates emissions based on head-count; looking at the 

number of employees as a potential to emit. I just have a hard time seeing how that correlates. Purchase 

records would probably be the most accurate.

Answer/Response: The District is willing to consider alternative calculations that use a reasonable basis for 

determining these emissions. 

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STAFF REPORT - Rule 321 Page I-29

September 20, 2010

Santa Barbara County APCD

Modeling Rule 321 on Other Air District Rules 

Question/Issue: When drafting PAR 321, we do not need to follow the other air district‟s rules word for word, 

right?

Answer/Response: That is correct; we can be flexible, to a degree. We may run the risk of getting unfavorable 

recommendations and/or disapprovals from ARB and/or U.S.EPA if we stray too far from the provisions found 

in other air district solvent rules.

Rule 323

Architectural Coating Application Equipment Cleaning

Question/Issue: Rule 323 does not contain any type of exemption for solvents used for cleaning coating 

equipment. Will the revised Rule 323 or 321 exempt solvents used for equipment cleaning?

Answer/Response: The District included an exemption in Rule 321.B.2 for the cleaning of architectural coating 

application equipment. Per the 2007 CAP, the District will revise either Rule 321 or 323 to include solvent 

cleaning requirements later.

Rule 339

Requirement to Use Low-ROC Solvents for Auto Painting.

Question/Issue: How will the District's rule address the auto painting industry's need to use pre-sanding 

solvents that have high ROC contents?

Answer/Response: The District modified Rule 339 in 2008 to include a limited exemption in Rule 339.B.8 for 

pre-sanding solvents.

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Santa Barbara County APCD

Appendix J

Santa Barbara County 

Comparison of the Adjoining Air District Permitting and Prohibitory Rules for 

Solvent Cleaning Machines and Solvent Cleaning

Air districts adjacent to the Santa Barbara County Air Pollution Control District include the San Joaquin Unified 

Valley Air Pollution Control District, the Ventura County Air Pollution Control District, and the San Luis Obispo 

County Air Pollution Control District. For brevity, the following acronyms are employed for the different Air 

Pollution Control Districts in the following analysis: 

San Joaquin Unified Valley Air Pollution Control District (APCD): SJV 

San Luis Obispo County APCD: SLO

Santa Barbara County APCD: SBC

Ventura County APCD: VC

For performing the comparisons of the proposed revised rules, staff considered the following categories: 

1. Definitions found in the “definitions” rule of the rulebook, 

2. Permit exemptions, 

3. Prohibitory rule requirements for solvent cleaning machines, and

4. Prohibitory rule requirements for solvent cleaning.

The following provides a summary of the similarities and differences for each of these categories.

DEFINITIONS FOUND IN THE “DEFINITIONS” RULE OF THE RULEBOOK (SBC RULE 102)

In general, the SJV, SLO, and VC rules relative to solvent cleaning machines and solvent cleaning include 

definitions that are similar to the ones we are proposing for Rule 102. The definitions being added to Rule 102 are 

needed to clarify terms that are used in Rule 202 (Exemptions to Rule 201) and Rule 321 (Solvent Cleaning 

Machines and Solvent Cleaning). Some of the new Rule 321 terms may also be added to operation-specific rules 

(323, 330, 337, 349, 351, 353, or 354) when the SBC modifies them to include enhanced solvent cleaning 

requirements.

The proposed amended Rule (PAR) 102 amended reactive organic compound definition includes an amended list of 

exempt compounds. The following table shows the list of the compounds the SBC is adding to the ROC definition 

as exempt compounds with notations on whether the adjoining air districts also include the compound as an exempt 

compound.

Compound Is the Compound In the 

SJV Rule 1020 VOC 

Definition?

Is the Compound In 

the SLO Rule 105 

VOC Definition?

Is the Compound In 

the VC Rule 2 Exempt 

Compound Definition?

dimethyl carbonate No No Yes

methyl formate; HCOOCH3

Yes1 No Yes

propylene carbonate No No Yes

tertiary-butyl acetate; C6H12O2 (“acetic 

acid, 1,1-dimethylethyl ester”)

2

Yes1 No Yes

 

1 The Rule has a provision on an application for an Authority to Construct and Permit to Operate needing to be 

submitted if an operator elects to use more than one gallon per year per facility of the compound.

2 Tertiary-butyl acetate (also known as t-butyl acetate or tBAc) shall be considered exempt as a reactive organic 

compound only for purposes of reactive organic compound emissions limitations or reactive organic compound 

content requirements and will continue to be a reactive organic compound for purposes of all recordkeeping, 

emissions reporting, photochemical dispersion modeling, and inventory requirements which apply to reactive 

organic compounds.
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Santa Barbara County APCD

Compound Is the Compound In the 

SJV Rule 1020 VOC 

Definition?

Is the Compound In 

the SLO Rule 105 

VOC Definition?

Is the Compound In 

the VC Rule 2 Exempt 

Compound Definition?

HCFC-31 (chlorofluoromethane) Yes Yes Yes

HCFC-151a (1-chloro-1-fluoroethane) Yes Yes Yes

HCFC-225ca (3,3-dichloro-1,1,1,2,2-

pentafluoropropane)

Yes Yes Yes

HCFC-225cb (1,3-dichloro-1,1,2,2,3-

pentafluoropropane)

Yes Yes Yes

HFC-23 (trifluoromethane) Yes Yes Yes

HFC-32 (difluoromethane) Yes Yes Yes

HFC-43-10mee (1,1,1,2,3,4,4,5,5,5-

decafluoropentane)

Yes Yes Yes

HFC-161 (ethylfluoride) Yes Yes Yes

HFC-236ea (1,1,1,2,3,3-

hexafluoropropane)

Yes Yes Yes

HFC-236fa (1,1,1,3,3,3-

hexafluoropropane)

Yes Yes Yes

HFC-245ca (1,1,2,2,3-

pentafluoropropane)

Yes Yes Yes

HFC-245ea (1,1,2,3,3-

pentafluoropropane)

Yes Yes Yes

HFC-245eb (1,1,1,2,3-

pentafluoropropane)

Yes Yes Yes

HFC-245fa (1,1,1,3,3-

pentafluoropropane)

Yes Yes Yes

HFC-365mfc (1,1,1,3,3-

pentafluorobutane)

Yes Yes Yes

HFE-7100; (CF3)2CFCF2OCH3; (2-

(difluoromethoxymethyl)-

1,1,1,2,3,3,3-heptafluoropropane) or 

C4F9OCH3; (1,1,1,2,2,3,3,4,4-

nonafluoro-4-methoxy-butane)

No No No

HFE-7200; (CF3)2CFCF2OC2H5; (2-

(ethoxydifluoromethyl)-1,1,1,2,3,3,3-

heptafluoropropane) or C4F9OC2H5; 

(1-ethoxy-1,1,2,2,3,3,4,4,4-

nonafluorobutane)

No No No

PERMIT EXEMPTIONS (SBC RULE 202)

Exceptions to Permit Exemptions, 1 Ton per Year Exemptions, Temporary Equipment Exemptions, and Low 

Emitting Units Exemptions. SBC, SLO, and SJV rules include provisions on exceptions to permit exemptions that 

negate an exemption under certain conditions. The VC rule does not have any such exceptions. A permit exemption 

unique to SBC is an exemption for sources with uncontrolled actual emissions less than 1 ton per year. VC and SBC 

have temporary equipment exemptions, but the VC rule is limited to the temporary use of gasoline storage 

containers. SJV and SLO do not have temporary equipment permit exemptions. Found in the SJV and SLO rule are 

exemptions for low emitting units (not to exceed 2 pounds per day). No such exemption is within the SBC or VC 

rules.

Exemptions for Unheated Nonconveyorized Cleaning Equipment. All four air districts include exemptions for 

unheated nonconveyorized cleaning equipment. The SJV and SLO rule provisions are somewhat similar. They both 

limit the exemption to units that emit less than 25 gallons of solvent per year. However, the provisions on the unit‟s 

surface area (10 ft

2

vs. 10.8 ft2) and the solvent initial boiling point (248°F vs. 302°F) differ. The VC rule allows 

heated, but not boiling, units provided the ROC emissions from the entire source is less than 1,000 pounds per every 
STAFF REPORT - Rule 321 Page J-3

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Santa Barbara County APCD

rolling 12 consecutive calendar month period. The VC cutoff on the initial boiling point is 302°F and the surface 

area cutoff is 10.8 ft2. The SBC Rule 202.U.1 exemption will apply to units of 1 gallon capacity or less and the 

Section 202.U.2 exemption will continue to have exemptions similar to those in the adjoining air districts (e.g., 

exemptions for small surface area [1 ft2], aqueous cleaning solutions, and high boiling point solvent [≥302°F]).

Exemptions for Solvent Wipe Cleaning Operations. SBC Rule 202.U.3 provides an exemption for wipe cleaning 

operations provided the usage rate does not exceed 55 gallons per year per stationary source and the aggregate 

emissions from all equipment subject to Rule 202.U.3 do not exceed a 10 tons per calendar year gatekeeper. The 

SLO and SJV rules do not include a specific exemption for wipe cleaning. The VC Rule 23.F.10.d includes an 

exemption for wipe cleaning, provided the aggregated emissions from solvent cleaning operations (including cold 

cleaners, vapor degreasers, wipe cleaning, and flush cleaning) is less than 200 pounds each of each ROC, methylene 

chloride, 1,1,1 trichloroethane, and perchloroethylene are lost to the atmosphere from all such activities at the 

stationary source during any rolling period of 12 consecutive calendar months. 

Exemptions that Could Apply to Solvent Cleaning and Exemptions for Miscellaneous Solvent Use. VC Rule 

23.F.6 provides an exemption that could apply to solvents: nonrefillable aerosol cans. Also, exemptions in VC 

Rules 23.F.7, 8, and 9 cover organic compound emissions from a variety of operations; including 1) facility, 

grounds, and building maintenance and repair - not including maintenance and repair of process and industrial 

equipment when performed by contractors; 2) janitorial maintenance (including graffiti removal); and 3) office and 

administrative use of solvents - does not include production activities by facility involved in graphic arts. The SLO, 

SJV, and existing SBC exemptions do not include exemptions similar to these VC exemptions. However, SBC is 

proposing to add exemptions for 1) janitorial cleaning (Rule 202.U.5) and 2) solvent cleaning to disinfect and 

decontaminate surfaces and equipment at hospitals, health care facilities, etc. (Rule 202.U.4). The adjoining air 

districts do not have an exemption similar to the proposed Rule 202.U.4 provision.

Exemptions for Low-ROC Solvent Use. VC Rules 23.F.10.a and b exempt cleaning operations and materials if the 

cleaning agents: 1) are certified by the SCAQMD as Clean Air Solvents, or 2) contain no more than 25 g/l of ROC 

as used or applied, and no more than 5 percent by weight combined of methylene chloride, perchloroethylene, 

trichloroethylene, 1,1,1-trichloroethane, carbon tetrachloride, and chloroform. SBC Rule 202.U.2.c exempts 

solvents with a ROC content of 2 percent or less by weight. An exact comparison of the percent by weight and the 

number of grams per liter is not possible without knowing the solvents density. SJV and SLO rules do not include a 

specific exemption for low-ROC solvents.

PROHIBITORY RULE REQUIREMENTS FOR SOLVENT CLEANING MACHINES AND SOLVENT CLEANING (SBC RULE 

321)

The solvent cleaning machine and solvent cleaning requirements have several components, as outlined below.

 Applicability. The SLO Rule 416 does not have an applicability section. The SJV Rule 4662 indicates it 

applies to all organic solvent degreasing operations. The SJV Rule 4663 indicates it applies to any organic 

solvent cleaning performed outside a degreaser during the production, repair, maintenance, or servicing of 

parts, products, tools, machinery, equipment, or in general work areas at stationary sources; and to the 

storage and disposal of all solvents and waste solvent materials at stationary sources. 

The VC Rule 74.6 applicability provision covers solvent cleaning and degreasing. It basically indicates 

that the rule applies to any person who performs solvent cleaning activities and any person who 

manufactures or supplies solvent for use in solvent cleaning activities in Ventura County (unless the 

cleaning activity is exempt from Rule 74.6 or the solvent used has an ROC content of 25 grams per liter or 

less). The VC Rule 74.6.1 indicates it applies to batch loaded vapor degreasers.

The SBC PAR 321 applicability provision indicates the rule will apply to solvent cleaning machines and 

solvent cleaning. The use of the solvent cleaning machine term is a new approach adopted only by the 

SBC. This term is essentially the same one found in 40 CFR, Part 63, Subpart T. Thus, there is an inherent 

difference in terms used to describe degreasers vs. solvent cleaning machines throughout PAR 321 when 

compared with the adjoining Air Pollution Control District solvent rules. The SBC solvent cleaning term is 

modeled on the SJV Rule 4663 definition of organic solvent cleaning. 
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Santa Barbara County APCD

The SBC PAR 321 applicability provision is similar to the one found in the SJV Rule 4663. However, 

PAR 321, Section A, indicates, “This rule shall apply to any person who owns, operates, or uses any 

solvent cleaning machine or performs any solvent cleaning ...” Thus, the owner, operator, and end user are 

responsible for compliance with Rule 321. 

 Exemptions. These are in several categories:

 Wipe Cleaning. SLO exempts wipe cleaning from the solvent rule requirements. There is no such 

exemption in the SJV, or the SBC PAR 321.

 Low-ROC and Low-TAC Solvents. VC Rules 74.6 and 74.6.1 exempt solvents certified by the 

SCAQMD as Clean Air Solvents and solvent with an ROC-content no more than 25 grams per liter (as 

applied). The SJV Rule 4662 and 4663 have implied exemptions for solvents containing less than 25 

grams per liter of ROC via the rules‟ definition of solvent. As mentioned in the following discussion 

on the SBC Rule 321 solvent definition, the VC and SJV solvent definitions only include solvents that 

contain ROCs. Thus, the VC and SJV solvent rules do not apply to non-ROC solvents that contain 

TACs.

SLO does not have an exemption in this category.

The PAR 321.B.1 two percent or less exemption is being expanded to apply to the solvent‟s ROC and 

TAC content. Thus, solvent cleaning and solvent cleaning machines will be exempt from Rule 321 

(except for recordkeeping to substantiate the exemption claims) if the solvent has an ROC content and

a TAC content of two percent or less. If either the ROC or the TAC content exceeds two percent, then 

the exemption will not apply.

 Small Capacity and/or Limited Surface Area. The SLO Rule 416 provides partial exemptions from 

emission reduction techniques for various units not exceeding certain thresholds. 

The SJV Rule 4662, Sections 4.2 and 4.3 provide an exemption for qualifying degreasers that have an 

open top surface area of less than 1.0 square foot or with a capacity < 2 gallons.

The VC Rule 74.6, Surface Cleaning and Degreasing, does not include exemptions in this category. 

However, the VC Rule 74.6.1, Batch Loaded Vapor Degreasers, Section G.3 small vapor degreaser 

provisions provide exemptions from the requirements to install an automated parts handling system 

and enhanced emission control equipment. To qualify, the unit must meet certain size/capacity 

provisions and not emit more than 55 gallons per month. 

The SBC is proposing to delete the general small cleaner exemptions (Rule 321.B.2) because the PAR 

321 has new provisions that will apply to these smaller-sized containers and devices. The District is 

adding two limited exemptions (321.B.18 and 20) for vapor solvent cleaning machines. These

provisions will exempt qualifying units from some of the new requirements for vapor solvent cleaning 

machines. There is also a partial exemption in PAR 321.B.23 to allow pouring solvent from small 

containers into bulk storage containers without the use of transfer hoses, piping, or tubes.

 Solvent Cleaning Machines Subject to 40 CFR, Part 63, Subpart T Provisions. The SLO Rule 416 

and the SJV Rule 4662 do not have any exemptions in this category. Both the VC Rule 74.6 and 

74.6.1 provide this exemption. Staff proposes that the SBC PAR 321 retain this exemption.

 Equipment and Operations Subject to Other Rules. The SLO Rule 416 does not have any 

exemptions in this category. The SJV Rule 4662 does not have any explicit exemptions in this 

category. However, SJV Rule 4662, Section 4.1, exempts cleaning outside a degreaser. This implies 

solvent cleaning subject to the SJV Rule 4663 is exempt from Rule 4662. The SJV Rule 4663, Section

4.3, provides exemptions to operations specifically subject to or exempted by 14 other rules.
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Santa Barbara County APCD

VC Rule 74.6, Section E.1.f provides exemptions for any cleaning operation subject to one of the listed 

six prohibitory rules. Also, Section E.1.d of this rule includes an exemption for vapor degreasers. 

Batch loaded vapor degreaser are subject to Rule 74.6.1. 

The SBC PAR 321, Section B.3 exempts dry cleaning operations (either subject to Rule 320 or the 

State Airborne Toxic Control Measure) from the entire Rule 321 provisions. Section B.6 provides 

exemptions from the solvent cleaning aspects of Rule 321 for eleven SBC prohibitory rules. 

 Exemption from the ROC Limits for Solvent Cleaning When Using Limited Amounts of Solvent. 

The SLO solvent rule does not have an exemption in this category. The VC Rule 74.6, Section E.2.o, 

allows use of non-compliant solvent in certain circumstances. The facilitywide usage is to be less than 

1 gallon per week, compliant solvents cannot be available, and records substantiating the exemption 

claim need to be maintained.

The SJV Rule 4663, Section 4.4, provides an exemption to the solvent cleaning ROC limits for 

stationary sources using no more than 55 gallons per any rolling, consecutive 365-day period. This 

SJV exemption requires that daily records be maintained to support the exemption claim. The SBC 

PAR 321, Section B.15 provides a similar exemption to the solvent cleaning ROC limits for stationary 

sources using no more than 55 gallons per year. PAR 321.R.2 requires that monthly and calendar year 

total records be maintained on a stationary source basis to support the exemption claim. 

 Janitorial Cleaning (Including Graffiti Removal). This exemption is for solvent wipe cleaning 

associated with janitorial cleaning, but does not include the cleaning of general work areas at stationary 

sources. The SBC PAR 321, Section, B.7, the VC Rule 74.6, Section E.1.c, and the SJV Rule 4663, 

Section 4.1, include an exemption for janitorial cleaning. The SLO solvent rule does not have a similar 

exemption specific to janitorial cleaning, but their rule is for solvent cleaning machines. Further, the 

SLO rule has a general solvent wipe cleaning exemption.

 Aerosol Solvent Cleaning. The PAR 321.B.9 has a limited exemption (from the solvent atomization 

prohibition and the solvent ROC limit) for cleaning with aerosol solvents. The genesis of this 

exemption stems from provisions in the South Coast AQMD Rule 1171, Section (h)(4). 

The VC Rule 74.6, Section E.1.b, provides an exemption for the use of aerosol products. 

The SLO and SJV solvent rules do not include an exemption for the use of aerosol solvent cleaning.

 Specific Parts Cleaning Requiring Higher-Degrees of Cleanliness. The SLO Rule 416 does not 

have any exemptions in this category. 

The SJV Rule 4662 exempts the cleaning of electrical; high-precision optics; electronic applications; 

aerospace and military applications for cleaning of solar cells, laser hardware, fluids systems, and 

space vehicle components; and components used in research and development programs and laboratory 

tests for quality assurance. However, to qualify for the exemption, such cleaning must employ an 

unheated SCM that has an area of less than one square feet or a capacity of less than 2 gallons and a 

non-halogenated solvent. Further, the solvent usage needs to be less than five gallons per month and 

other provisions must be met.

The VC Rule 74.6, Section 2 provides exemptions from the solvent partial pressure and ROC content 

limits for equipment similar to the ones listed in the SJV Rule 4662. The VC Rule exemption list 

includes additional items as well (e.g., manufacturing cleaning of nuts and bolts intended for 

automotive racing applications and cleaning of precision-lapped mechanical seals in pumps).

The SBC PAR 321 includes exemptions on the solvent ROC content limit for several specific parts 

cleaning categories. The District modeled these exemptions on similar exemptions in the SJV and VC 

rules. 
STAFF REPORT - Rule 321 Page J-6

September 20, 2010

Santa Barbara County APCD

 Gas-Path Cleaner. The SLO and SJV rules do not have any exemptions in this category. VC Rule 

74.6, Section E.3 exempts aircraft engine gas path cleaning and gas turbine gas path cleaning from the 

requirements in 1) Section B.1 (solvent partial pressure and ROC content limits), and 2) Section B.2 

(required cleaning devices and methods) if the solvent‟s ROC content is 200 grams per liter or less. 

The SBC PAR 321 has special provisions applicable to gas-path cleaners and therefore does not have 

an exemption for these types of cleaners.

 Aircraft and Aerospace Vehicle De-Icing. None of the adjoining Air Pollution Control Districts 

have this exemption. The SBC is adding the exemption because 1) the removal of moisture with a 

solvent (e.g., diluted ethylene glycol) is considered to be solvent cleaning, and 2) it is not our intent to 

regulate de-icing activities (no other air districts have applied their solvent cleaning rules to such). 

 Exemption from Enhanced Control Techniques for Qualifying Small Vapor SCMs. For 

qualifying small units (solvent/air interface area less than1 square foot or capacity less than 2 gallons), 

the SBC Rule 321 will allow equipment use without an automated parts handling system, a freeboard 

refrigeration device, or a superheated vapor zone. The genesis for this exemption stems from an 

exemption in the VC Rule 74.6.1. The SJV Rule 4662 provides a broader exemption, which has more 

qualifiers. The SLO solvent rule does not provide a similar exemption.

 Exempting Solvents When they Are Not Used for Cleaning. The VC Rule 74.6 includes an 

exemption for the use of solvent for purposes other than solvent cleaning activities. For example, a 

solvent may be used as coating thinner or to dilute a sample for laboratory analysis. It is not the intent 

of Rule 321 to regulate such uses. Thus, the SBC staff added an exemption similar to the VC Rule 

74.6.E.1.h exemption. The SJV and SLO rules do not include such an exemption.

 Exemption from the Workload Area Limit, Minimum Freeboard Ratio Requirement, and/or

Enhanced Control Techniques for Qualifying Vapor SCMs Used in the Manufacturing of 

Electronic Components. These are limited exemptions for vapor cleaning machines used in the 

manufacturing of electronic components. These exemptions (PAR 321.B.20 and 321.B.24) are unique 

to SBC and will allow qualifying vapor solvent cleaning machines to be operated without meeting the 

workload area limit (PAR 321.E.7), the freeboard ratio requirement (J.8), and/or without using the 

enhanced control techniques (J.8 and J.11.a, d, and e). The District is proposing these exemptions

based on input from Raytheon and their existing operations. Raytheon has indicated that they have a 

highly-specialized cleaning process for a product requiring a high degree of cleanliness. Further, they 

have been unable to find a suitable solvent replacement and/or equipment that would comply with the 

PAR 321 provisions while meeting their high-cleanliness standard. 

 Solvent Wash Stations used in Medical Device Manufacturing Processes. The SBC proposes to 

exempt solvent sinks used during medical device manufacturing for product leak testing from certain 

rule requirements. The exemption (PAR 321.B.21) will allow such sinks to be used without meeting 

the requirements to have a minimum freeboard height/ratio and be employed without a low-ROC 

solvent. These sinks are currently exempt by the Rule 321, Section B.2 – small surface area and/or 

capacity – exemption. Product solvent cleaning during the quality control/assurance testing is 

incidental to the process. Providing this exemption is consistent with the intent of PAR 321 to control 

emissions from solvent cleaning and solvent cleaning machines. The adjoining air districts do not 

include a similar exemption in their rules.

 Metal Lift-Off and Other Semiconductor and Microelectromechanical Operations. This 

exemption is unique to SBC; the adjoining air districts solvent rules do not include this category. The 

District is adding this exemption to clarify that metal lift-off operations and the other specifically listed 

operations are not subject to the Rule 321 requirements. 

 Definitions. Generally, the definitions used in the SBC PAR 321 are different from those used by the 

adjoining air districts. As previously mentioned, the terms for degreasers are being modified to be 
STAFF REPORT - Rule 321 Page J-7

September 20, 2010

Santa Barbara County APCD

consistent with the terms found in 40 CFR, Part 63, Subpart T. Also, the SBC PAR 321 solvent definition 

includes any liquid containing any reactive organic compound or any toxic air contaminant. The SLO 

rules do not include a definition of solvent. And the VC and SJV solvent definitions are limited to reactive 

organic compounds (or volatile organic compounds, which generally means the same as reactive organic 

compounds). Thus, the VC and SJV solvent definitions do not include a TAC aspect. SBC is 

recommending that some of the definitions currently found within Rule 321 be relocated into the general 

definition rule (102). 

 Requirements. There are several components to these provisions, as shown in the following summaries.

 Operating Requirements. These are listed in SLO Rule 416, Section C, SJV Rule 4662, Sections 

5.1.1, 5.2.2, 5.3.1, and 5.4.2, VC Rule 74.6, Section D, VC 74.6, Section C, and SBC PAR 321, 

Sections D, E, F, M, N, and O. The operating requirements are generally the same for all the air 

districts, with some minor variations. The SBC PAR 321 includes additional operating requirements 

not found in the other air district‟s rules, as listed below:

1. Operating requirements for batch vapor and in-line vapor cleaning machines to have their idling 

mode covers and downtime mode covers in place when the equipment is in the respective mode. 

2. Operating requirements for gas-path solvent cleaners.

 Equipment Requirements. These are listed in various sections of the SLO, SJV, SBC, and VC rules. 

The equipment requirements are generally the same for all the air districts, with some minor variations. 

The SBC PAR 321 includes additional equipment requirements not found in the other air district‟s 

rules. These additional equipment requirements are associated with the same equipment listed in the 

preceding “operating requirements” discussion. 

The SBC PAR 321 will implement several enhanced control techniques, which become effective one 

year after the date of the revised rule adoption:

1. Vapor cleaning machines are to have dimensions such that their freeboard ratio is 1.0 or greater, 

2. Cold cleaning machines, including remote reservoir cold cleaning machines, are to use solvents 

with an ROC-content of 50 g/l or less, 

3. Vapor cleaning machines employing a solvent with an ROC content of 50 g/l or greater need to 

have an automatic parts handling system, a superheated vapor zone, a freeboard refrigeration 

device, and other associated items.

The SLO Rule 416 does not have similar enhanced control techniques. 

The VC rules have similar requirements on the freeboard ratio, the solvent ROC content (at 25 grams 

of ROC per liter), and the requirement for an automatic parts handling system. However, the vapor 

cleaner requirement specifies the use of at least one of these techniques (not both a superheated vapor 

zone and a refrigerated freeboard chiller, as in the SBC PAR 321).

The SJV Rule 4662 requires all cleaners subject to the rule to have a freeboard ratio of 1.0 or greater. 

SJV Rule 4662, Sections5.1.2 requires cold cleaners to use a solvent with an ROC content of 25 g/l or 

less. Also, SJV Rule 4662, Sections 5.4.10 and 5.5.7 require the use of an automatic parts handling 

system, a superheated vapor zone, and a freeboard refrigeration device.

 Solvent ROC Content Limits. The SLO Rule 416 does not limit the solvent ROC content. The VC 

and SJV rules generally limit the solvent ROC content to 25 grams per liter for solvent cleaning 

machines and solvent cleaning. Both air districts provide exceptions to these limits. In general the 

SBC is taking the same approach, but with a solvent limit of 50 grams per liter.

 Solvent Cleaning Devices and Methods. The District modeled the proposed Rule 321, Section M.2 

provisions on the requirements in SJV Rule 4663, Section 5.2 (Cleaning Methods) and, to a larger 

degree, on the VC Rule 74.6, Section B.2 (Cleaning Devices and Methods Requirements). However, 
STAFF REPORT - Rule 321 Page J-8

September 20, 2010

Santa Barbara County APCD

SBC staff used most of the VC text verbatim as they had modified their rule to address U.S.EPA

concerns. The SLO Rule 416 does not have similar provisions on solvent cleaning. 

 Cleaning of Spray Application Equipment. PAR 321.M.3 will require the cleaning of spray 

application equipment to use:

1. A cleaning solvent with an ROC content of 50 grams per liter or less, or

2. An enclosed system (or equipment that is proven to the satisfaction of the Control Officer to 

equally effective as an enclosed system).

The SLO degreasing operations rule does not have specific requirements for the cleaning of 

application equipment. VC Rule 74.6 requires application equipment cleanup solvents to have 1) an 

ROC composite partial pressure no greater than 33 millimeters of mercury at 20 degrees Celsius, and 

2) an ROC content no greater than 900 grams per liter.

The application equipment cleaning requirements in SJV Rule 4663, Section 5.2.3, are essentially the 

same requirements proposed in the SBC revised Rule 321.

 Compliance Statement Requirement. The SJV Rule 4663, Section 6.1, and the VC 74.6, Section 

B.7, require the specification of the solvent‟s ROC content on the solvent container or a separate 

product sheet. The SBC PAR 321 and SLO Rule 416 do not have a similar requirement. 

 Emission Control System Requirements. All of the adjoining air districts have provisions on 

emission control systems. However, the District‟s PAR 321.N.1 is the only rule provision to also 

require that TACs be controlled with an overall efficiency of 85 percent or greater. 

VC Rule 74.6 and SJV Rule 4662 require an overall control efficiency of 85 percent. SJV Rule 4663

requires an overall control efficiency of 85.5 percent or 90 percent collection efficiency with an 

exhaust less than 50 ppmv of VOC. And the SLO Rule stipulates the control efficiency must be 95 

percent (there is no collection efficiency).

 Alternative Operating and Equipment Requirements for An Airless Solvent Cleaning Machine 

or an Air-Tight Solvent Cleaning Machine. The PAR 321 includes an alternative compliance 

method for airless or air-tight solvent cleaning machines. 

The SLO rule does not include a similar provision. The two VC rules governing solvent cleaning and 

solvent cleaning machines provide for the use of an alternative cleaning system, provided that the 

system is approved by the APCO and U.S.EPA and the emission rate from the system are lower than 

the emission rate from complying with the other rule requirements.

The SJV Rule 4662, Section 5.6, provisions on the use of air-tight or airless cleaning systems are 

similar to the SBC PAR 321, Section O, provisions.

 Test Methods. The current and PAR 321 contain test methods, as do all of the adjoining air district 

solvent rules, except for SLO.

 Operation and Maintenance Plan. The requirement for an operation and maintenance plan is in the 

current and PAR 321. Under the SBC rule, these plans need to be developed and implemented when a 

source is using an emission control device. None of the adjoining air districts have a comparable 

requirement.

 Recordkeeping Requirements. Currently, the SBC Rule 321 recordkeeping provision requires 

quarterly records for sources having a solvent cleaning machine Permit to Operate. The District

proposes to make the recordkeeping frequency monthly and expand the requirements to any person 
STAFF REPORT - Rule 321 Page J-9

September 20, 2010

Santa Barbara County APCD

that uses a solvent cleaning machine or performs solvent cleaning that is subject to Rule 321. The 

SBC PAR 321 modified recordkeeping provision also includes requirements to:

1. Document the solvents‟ ROC content, 

2. When performing solvent cleaning, keep track of the type of solvent cleaning activity performed 

(per the rule‟s Table 1 categories) and the solvent type used for the activity, 

3. Specify the type of solvent cleaning machine used, 

4. When using an emission control system, record key operating parameters, 

5. When using aerosol products and claiming an exemption per Section B.9, maintain daily records 

on the solvent usage rates on a facility basis, and

6. Maintain monthly records on the solvent usage rates for sources claiming the PAR 321.B.15

exemption from the PAR 321.M.1 ROC limits. 

The SLO rule does not include any recordkeeping provisions. The SJV recordkeeping provisions in 

their two solvent rules (4662 and 4663) are similar to the SBC PAR 321 recordkeeping requirements. 

However, the SJV Rule 4663 recordkeeping provisions do not include the documentation of aerosol 

product use because the rule does not include this exemption.

In general, the combined VC recordkeeping provisions from their two solvent rules are less rigorous 

then those in the PAR 321. 

 Reporting Requirements. The SBC current and PAR 321 require the submittal of an annual report, 

but only for sources holding a permit for a solvent cleaning machine or solvent cleaning. None of the 

adjoining air districts require the submittal of annual reports.

 Compliance Schedule. The SJV Rules 4662 and 4663 included some new provisions with an 

effective date one year from the date of the rule amendment. VC adopted revisions to Rule 74.6 and 

the new Rule 74.6.1 on November 11, 2003 and made both of the rules effective July 1, 2004. The 

SLO Rule 416 was adopted June 18, 1979 with an effective date of January 1, 1980.

In general, the provisions in proposed amended Rule 321 will become effective on the date of rule 

adoption, with a few exceptions:

1. The owners or operators of equipment becoming subject to Rule 321 due to a Rule 102, Rule 202, 

and/or Rule 321 change will have phased compliance periods, as specified in Rule 321, Section 

T.3.

1

 Similarly, any equipment previously subject to a Rule 321 exemption that is lost through the 

rule revisions will also have similar phased compliance deadlines per PAR 321.T.2.b.

2

2. Certain new provisions in Sections H through and including M provide for a one-year compliance 

deadline.3

Click here to return to the list of Appendices in the Staff Report.

 

1

For example, existing solvent cleaning employing smaller containers (1 gallon capacity or less) subject to the PAR 

202.U.1 permit exemption will need to comply with the Rule 321 provisions within the phased compliance period in 

Section T.3 (i.e., 180 days from the date of revised rule adoption). 

2

For example, a remote reservoir cleaning machine that had been subject to the Rule 321.B.2 exemption will be 

required to comply with Rule 321 equipment provisions due to a loss in an exemption. Per PAR 321.T.2.b.3) the 

deadline to comply with the equipment requirements will be 365 days from the date of revised rule adoption. 

3 Table 1 in Appendix E (page E-3) provides a summary of the provisions with a one-year deadline for compliance.
THIS PAGE INTENTIONALLY LEFT BLANK
STAFF REPORT - Rule 321 Page K-1

September 20, 2010

Santa Barbara County APCD

Appendix K

Santa Barbara County 

Impacts from the Revised Rules

Industry Impacts 

The impacts from the revised rule will depend on the type of parts, products, and equipment being cleaned and the 

cleaning processes being used. In general, the revised Rule 321 will require the use of solvents with an ROC 

content of 50 grams per liter or less, unless a solvent with a higher ROC content is necessary to achieve a higher 

degree of cleanliness for a solvent category identified in Rule 321, Section M, Table 1. In which case, there will be 

a “not to exceed” limit of 900 or 950 grams of ROC per liter or an exemption from the solvent ROC content limit. 

Sources switching to aqueous solvents or detergents will likely see cost savings. 

The following provides information on the impacts from the various rule revisions and data on the sources 

potentially impacted by the changes.

RULE 102, DEFINITIONS

The addition of the new Rule 102 terms by themselves will not cause impacts. Some of the new terms 

combined with amendments to Rules 202 and 321 will result in impacts, as discussed under the rule categories 

shown below. 

The PAR 102 amended reactive organic compound definition includes an amended list of exempt compounds. 

The use of some of the newly-designated exempt compounds in excess of one gallon per year per stationary 

source will require the submittal of an application for Authority to Construct and Permit to Operate. The 

following Rule 202 discussion provides more details on sources that will be impacted from the ROC definition 

change and the new Rule 202.D.10.l.1 and 2 provisions.

RULE 202, EXEMPTIONS TO RULE 201

There may be some permitting activities due to the new Rule 202.D.10.l provisions, which are associated with 

the Rule 102 revised definition of ROC. Vandenberg Air Force Base (VAFB) staff mentioned that the base is 

currently using more than one gallon per year of HFE-7100 in aerospace activities. Revised Rule 202.D.10.l.l

will clarify that such an operation needs an Authority to Construct and Permit to Operate. There may be 

additional sources using compounds subject to the new Rule 202.D.10.l.1 or 2 provisions. For example, any 

company using AsahiKlin AK-225 (HCFC-225ca and HCFC-225cb) in amounts exceeding one gallon per year 

per source that are not already subject to a District permit will need to submit an application.

a

 

The District is unaware of any other sources that will become subject to permitting due to the new Rule 202, 

Section D.10.l provisions. Aside from the above-referenced VAFB situation and other sources that may be 

using a compound listed in PAR 202.D.10.l, the proposed revisions to the exemptions for solvent cleaning and

solvent cleaning machines are not anticipated to cause any additional permitting activities. Thus, there should 

be no significant permitting impacts to the regulated industry due to the new Rule 202.D.10.l provisions.

An amendment to provisions in Rule 202.U.1 require unheated nonconveyorized solvent rinsing containers with 

a capacity of 1.00 gallons or less to comply with the Rule 321 solvent cleaning provisions. Hence, some owners 

and operators claiming the Rule 202.U.1 exemption will need to comply with the requirements in Rule 321, 

Sections D, M, and R for the first time. 

RULE 321, SOLVENT CLEANING MACHINES AND SOLVENT CLEANING

Compliance with Rule 321 provisions may cause a source to: 

 

a Lockheed Martin-Santa Barbara Focal Plane and Raytheon have permits for their vapor SCMs that use AsahiKlin 

AK-225 (PTO 10282 and 11326, respectively).
STAFF REPORT - Rule 321 Page K-2

September 20, 2010

Santa Barbara County APCD

a. Revise a solvent cleaning machine configuration, operating method, and/or use a substitute solvent;

b. Replace the solvent used in solvent cleaning with a lower ROC-content solvent; 

c. Follow new or improved solvent handling techniques per the general operating requirements section of the 

rule (Section D);

d. Modify existing solvent cleaning techniques to be consistent with the new requirements (i.e., use 

sanctioned devices and methods);

e. Implement recordkeeping for the first time; and/or 

f. Modify their existing recordkeeping procedures (e.g., perform monthly recordkeeping, maintain additional 

data, perform daily recordkeeping when claiming the “aerosol product” exemption).

The scope of the Rule 321 applicability is being increased to include solvents that contain any toxic air 

contaminant (TAC). In general, solvent cleaning machines and solvent cleaning operations using solvents that 

contain any TAC will be subject to Rule 321 requirements, irrespective that the solvents do not have any ROC. 

The TAC aspect is being incorporated via the Rule 321 solvent definition, which includes “or any toxic air 

contaminant” text. 

Table 1 shows six compounds that are classified as being both a non-reactive organic compound and a toxic air 

contaminant. Any person subject to the PAR 321.A applicability provision that is using a Table 1 compound in 

a concentration greater than 2 percent in a solvent cleaning machine or when performing solvent cleaning will 

be subject to Rule 321 unless exempt per Rule 321, Section B.a

Table 1. COMPOUNDS IDENTIFIED AS BEING BOTH A NON-ROC AND A TAC SOLVENTb

COMPOUND

SOLVENT 

REGULATED 

BY 40CFR, 

PART 63, 

SUBPART T

CAS No.

ABBREVIATED 

OR POLLUTANT 

CODE

HIGH OR LOW 

VOLATILITY 

SOLVENT

tert-butyl acetate N 540-88-5 TBAC H

methylene chloride, dichloromethane Y 75-09-2 METH or DCM H

perchloroethylene, tetrachloroethylene Y 127-18-4 PERC or PERCH H or Lc

1,1,2-trichloro-1,2,2-trifluoroethane N 76-13-1 CFC-113 H

1,1,1-trichloroethane; methyl 

chloroform

Y 71-55-6 TCA H

trichlorofluoromethane N 75-69-4 CFC-11 H

Thus, the aforementioned impacts due to Rule 321 compliance may occur to a source using a solvent that does 

not contain any ROC that is also classified as a TAC.

To determine the companies and agencies that may be impacted by these rulemaking actions, staff reviewed:

• District records for permitting and exempting solvent users and the District water-based cleaner rebate 

program, 

• Phonebook listings, and

 

a

If the TAC is also a halogenated hazardous air pollutant (HAP) solvent used in a SCM, its HAP concentration 

would need to be five percent by weight or less to be subject to Rule 321. (Current Rule 321, Section B.4.e and 

PAR 321.B.5 provide exemptions to SCMs using HAP solvents that are subject to 40 CFR, Part 63, Subpart T.)

b These are chemicals that the District has identified. There may be additional ones the District is unaware of.

c Categorizing the solvent as a high or low volatility solvent is a function of the solvent's in-use temperature.
STAFF REPORT - Rule 321 Page K-3

September 20, 2010

Santa Barbara County APCD

• Internet search engine listings.

Due to the ubiquitous nature of solvent use and the District permit-exempt status of many of the devices and 

operations, a comprehensive listing of all sources that may be impacted by the rule revision is not possible. 

Tables 1 and 2 in Appendix B list the facilities and automobile repair shops that may be impacted by the rule 

revisions.a 

The following information describes the anticipated rule impacts to the owners and operators of 1) various 

solvent cleaning machines, and 2) facilities performing solvent cleaning. This section does not include the inline cleaning machines category because the District is unaware of any current use of these machines in Santa 

Barbara County.

Batch Cleaning Machines (Sections D, E, G, H, I, and J)

Tables 2 and 3 list facilities that possibly use batch solvent cleaning machines (vapor and cold types). 

Table 2. BATCH VAPOR CLEANING MACHINES

Company FID

Advanced Vision Science 02463

Digital Instruments 03858

Kilovac Corporation 01670

Lockheed Martin (Santa Barbara Focalplane) 09424

Microwave Applications Group 01820

Raytheon - Buildings B1, B2, B3, & B6 

(Infrared)

04140

Raytheon - Building B8 03890

Raytheon - Hollister (Electronic Warfare) 01971

Renco Encoders, Incorporated 04574

Special Technologies Laboratory 02758

Vapor cleaning machines not otherwise exempt from the requirements will need to have a minimum freeboard 

ratio of 1.0 and automatic sump heat shut off devices for various operating conditions. In addition, any such 

machine that is employed with a solvent having an ROC content in excess of 50 grams per liter will need to 

have an automated parts handling system, circumferential trough, water separator, freeboard refrigeration 

device, and a superheated vapor zone.

b

 The installation of these devices on a currently permitted solvent 

cleaning machine will require the submittal of an Authority to Construct modification application.

Staff has not identified any permitted vapor cleaning machines that will need modifications under the proposed 

amended Rule 321. If a source needs to install a new device to comply with Rule 321, it will be impacted by 

the Authority to Construct (ATC) and Permit to Operate (PTO) application filing fees (currently 

$341/application). In addition, the ATC and PTO fees will be assessed (on a reimbursable basis). 

Owners and operators of vapor solvent cleaning machines needing to comply with the revised Rule 321 

requirements may encounter retrofit costs on the order of those shown below.

 

a Automobile repair shops are facilities that repair engines, transmissions, brakes and other similar components of 

motor vehicles and should not be confused with automobile body shops. Painting activities at body shops are 

regulated under Rule 339, Motor Vehicle and Mobile Equipment Coating Operations.

b Unless the solvent cleaning machine is equipped with an APCD-approved emission control system or is subject to 

a Rule 321.B.18 or 20 exemption.
STAFF REPORT - Rule 321 Page K-4

September 20, 2010

Santa Barbara County APCD

 Extending the freeboard: $2,800a

 Automated parts handing system (simple manually actuated hoist): $2,348

b

 Freeboard refrigeration device: $12,632b

Superheated vapor zones systems are relatively common on new solvent cleaning machines, but they may not 

be available as retrofits.c Thus, sources using vapor cleaning machines with solvents above the 50 grams per 

liter threshold may need to replace their machines to comply with the revised rule requirements. Staff estimates

the capital cost of a unit (using isopropyl alcohol-cyclohexane solvent mixture) may be on the order of 

$159,500 (plus installation costs).

d

 In addition, the District estimates the annual solvent cost for such a unit is 

about $413 per year.

 

Table 3. BATCH COLD CLEANING MACHINESe

Company FID

Advanced Vision Science 02463

Allergan Corporation 10084

Arguello, Inc., Platforms Harvest, 

Hermosa, and Hidalgo

08013 -

08015

Bardex Corporation 01152

Celite Corporation 00012

DCOR, LLC., Platform A 08003

DCOR, LLC., Platform B 08004

DCOR, LLC., Platform C 08006

DCOR, LLC., Platform Habitat 08012

DCOR, LLC., Platform Henry 08007

DCOR, LLC., Platform Hillhouse 08005

Digital Instruments 03858

Dupont Displays 10307

Dupont Displays 08709

Essex Electronics, Inc. 01480

ExxonMobil Production Company, Las 

Flores Canyon

01482

ExxonMobil Production Company, 

Platform Harmony

08018

ExxonMobil Production Company, 

Platform Heritage

08019

ExxonMobil Production Company, 

Platform Hondo

08009

ExxonMobil Production Company, 

POPCO Plant

03170

Fortistar Methane Group LLC 08676

Helix Medical, Incorporated 04487

Indigo Systems Corporation 09745

 

a

Staff used the freeboard extension cost estimate from the SCAQMD Staff Report for Proposed Amended Rule 

1122, dated June 6, 1997, with a CPI adjustment ($2,000/unit, 40.0% CPI increase).

b Based on estimates in the VCAPCD Rule 74.6 Draft Staff Report dated July 10, 2003 (with a 17.4% CPI increase).

c Reference, “Solvent Cleaning (Degreasing) An Assessment of Emission Control Options,” November 1992, Center 

for Emissions Control, Inc., page 32. 

d Based on data in a Michigan Manufacturing Technology Center document titled, "Background Information - IPACyclohexane Vapor Degreaser," 1999 (with a 37.5% CPI increase).

e

Includes remote reservoir batch cold cleaning machines.
STAFF REPORT - Rule 321 Page K-5

September 20, 2010

Santa Barbara County APCD

Company FID

International Transducer Co. 01634

Karl Storz Imaging, Incorporated 45883

Kilovac Corporation 01670

Lockheed Martin (Santa Barbara 

Focalplane)

09424

Medtronic PS Medical 04635

National Aeronautics & Space Admin. 06100

Pacific Hydraulic Systems 04617

Pacific Scientific, EKD 08934

Plains Exploration & Production 

Company, Lompoc Oil and Gas Plant

03095

Plains Exploration & Production 

Company, Platform Irene

08016

Raytheon 04140

Raytheon 01971

Raytheon 03890

Renco Encoders, Incorporated 04574

Skate One Corp. 03750

Spaceport Systems International 08698

Southern California Gas Company 01734

The Okonite Company 01900

Plains Exploration & Production 

Company, Platform Irene

08016

The Point Arguello Companies, Platform 

Hermosa

08014

The Point Arguello Companies, Platform 

Hidalgo

08015

Vandenberg Air Force Base 00201 

(+ Others)

Depending on the items or parts being cleaned, batch cold cleaning machines (including remote reservoir batch 

cold cleaning machines) may need to be used with a solvent having an ROC content of 50 grams per liter or 

less. The cleaning of certain items (e.g., electronic components and medical devices) is exempt from the 

requirement that the solvent ROC content be limited to 50 grams per liter. 

Some previously exempt solvent wash stations will become subject to the Rule 321 provisions for the first 

time.a These units will need to comply with the general equipment requirements for solvent cleaning machines 

(Rule 321.G) and the additional equipment requirements for batch cold cleaning machines (Rule 321.I). And, if 

such a solvent wash station is used with a high volatility solvent, some of the things the owner or operator will 

need to make sure the equipment is equipped with or complies with include:

1. A cover that is a sliding, rolling, or guillotine type; designed to easily open and close (PAR 321.I.1).

2. A drainage apparatus or device, so the parts are under the cover while draining (PAR 321.I.2), 

3. If the freeboard ratio of 0.75 compliance option is employed (PAR 321.I.4), a maximum solvent fill mark, 

which complies with the freeboard ratio requirement (Rule 321.I.6), and

 

a

“Solvent wash stations” include, but are not limited to, sinks and basins that typically contain unheated solvent 

used to clean parts and products by immersion and/or rinsing methods (batch cleaning mode). In general, such sinks 

and basins were subject to the Rule 321.B.2 exemption (capacity ≤ 1 gallon or evaporative surface area < 1 square 

foot; aggregate of such units < 10 square feet/stationary source). This exemption is deleted in the proposed 

amended Rule 321. However, a new provision (PAR 321.B.21) may provide limited exemptions for qualifying 

solvent wash stations. 
STAFF REPORT - Rule 321 Page K-6

September 20, 2010

Santa Barbara County APCD

4. A freeboard ratio of 0.75 (PAR 321.I.4) or alternative compliance requirement (PAR 321.I.5).

Solvent wash stations will need to use a solvent with a 50 grams per liter content (PAR 321.I.5) unless the 

process is exempt by a provision in PAR 321.B (e.g., PAR 321.B.8 or 21).

In general, one-third of the permitted cold solvent cleaning machines are used in the electronic or medical 

device manufacturing industries. Thus, these devices will not need to employ low-ROC solvents provided the 

solvents‟ ROC content does not exceed 900 grams per liter (per PAR 321.B.8). 

The other two-thirds of the permitted batch cold SCMs and the area source (unpermitted) parts and brake 

washers (e.g., SCMs used by the automotive repair shops) will need to be converted to low-ROC solvents to 

comply with the revised rule (if they have not already switched over to aqueous or detergent-type cleaning 

solutions).

The District cost-estimates for replacing existing batch cold solvent cleaning machines with complying 

machines that use aqueous solvents or detergents are shown below.

Sink-on-a-drum....................... $665 – $1,994a

Enzyme system .................... $1,329 – $1,994a

Immersion washer................ $1,063 – $2,259a

Spray cabinet........................ $2,658 – $7,974a

Ultrasonic system................. $3,987 – $15,948a

Heated brake cleaner.................... $1,329b

Unheated brake cleaner..................$665

b

Birdbath brake cleaner...................$930

b

Stand mounted brake cleaner.........$465

b

Generally, there are lower operating costs associated with aqueous cleaners. Thus, the equipment initial cost 

will be offset by lower operating costs.

Gas-Path Solvent Cleaners (Also Called “Corrosion Control Carts”) (Sections D, G, and F)

These machines (or ancillary equipment) are used to clean the interiors of gas turbine or jet engines. The 

District has not identified any facilities that employ these cleaners that will be subject to the rule. Thus, there is 

no impact expected to this equipment category. 

Air-Tight and Airless Solvent Cleaning Machines (Sections D and O)

Staff has identified only one facility with air-tight cleaning machines: Raytheon‟s Infrared facility (FID 4140). 

Table 4 lists the Raytheon air-tight solvent cleaning machines that will become subject to Rule 321.

 

a Based on cost figures from the Institute for Research and Technical Assistance‟s Pollution Prevention Center 

document titled, “Switching to Water-Based Cleaners for Repair and Maintenance Parts Cleaning,” CAL-EPA‟s 

Dept. of Toxic Substances Control Office of Pollution Prevention and Technology Development, Document No. 

616, dated 1999 (with a CPI increase of 32.9%).

b Based on cost figures from the Institute for Research and Technical Assistance‟s Pollution Prevention Center 

document titled, “Switching to Water-Based Cleaners for Automotive Brake Cleaning,” CAL-EPA‟s Dept. of Toxic 

Substances Control Office of Pollution Prevention and Technology Development, Document No. 619a, dated 1999 

(with a CPI increase of 32.9%).
STAFF REPORT - Rule 321 Page K-7

September 20, 2010

Santa Barbara County APCD

Table 4. AIR-TIGHT SOLVENT CLEANING MACHINES THAT 

WILL BECOME SUBJECT TO RULE 321

Device Identification No. Description

107323 TAS Automated Solvent Cleaner

108304 SSEC Solvent Cleaning Unit

Raytheon will need to ensure that these air-tight cleaning machines comply with the Rule 321, Section O 

provisions. There are no known impacts from Rule 321 becoming applicable to these units.

Solvent Cleaning (Section M)

Facilities that may be performing solvent cleaning that will become subject to Rule 321 are listed in Appendix 

B, Tables 1 and 2.

a

 

Depending on the general work surface category, items, products, or parts being cleaned, solvent cleaning will 

need to be performed with a solvent having an ROC content of 50 grams per liter or less. The proposed revised 

rule allows the use of solvents with higher ROC content when used in certain solvent cleaning categories (e.g., 

cleaning of electronic components or medical devices). Also, the revised rule will require that sanctioned 

cleaning devices and methods be used. 

These requirements become effective one year after the date of adoption of the revised rule. The District

proposes this compliance deadline to provide the regulated community adequate time to find suitable solvent 

replacements and/or make the necessary changes to the cleaning devices and methods to achieve compliance 

with the new provisions in Section M. For example, Helix Medical will be subject to the Section M, Table 1, 

900 g/l limits, but the source is currently using a solvent that exceeds the limit.b It appears that this source will 

be impacted by having to switch to a compliant solvent.

Facilities complying with the 50 grams per liter limits (PAR 321.M.1, Table 1) for solvent cleaning should have 

an overall aggregate savings of about $86,000 per year.c, d

The District is unaware of any impacts from the new Section M.2 (cleaning devices and methods) or Section 

M.3 (use of an enclosed gun washer or a cleaning material containing 50 grams per liter of ROC or less). Most 

facilities performing surface coating will be exempt from Section M.3 (per Section B.6). However, for cases

where the spray gun cleaning is not exempt from Section M.3, the owners or operators may comply by 

switching to a low-ROC cleaning material.

The cost savings from changing to a cleaning material that contains 50 grams of ROC per liter or less would 

likely be on the order of $0.75 per pound of ROC emissions reduced.c If switching to a low-ROC cleaning 

material is infeasible, the cost for an enclosed spray gun washer is about $1,900. The enclosed gun washer 

costs will be offset by reduced labor costs and reduced solvent costs (purchase and disposal).e 

 

a Additional facilities may exist that perform solvent cleaning that will become subject to Rule 321 that the District 

is unaware of.

b Helix Medical uses cyclohexanone (947 g/l) - FID 4487, DID 107500, process 0003. 

c Based on a savings figure of “$1,325 per ton of ROC reduced” for other solvent cleaning operations indicated in an 

EPA document titled, “Control Techniques Guidelines: Industrial Cleaning Solvents,” EPA 453/R-06-001, 

September 2006 (with a CPI increase of 17%).

d Also based on estimated 55.76 tons per year of ROC emission reduced for the “handwiping” category.

e EPA Proposed Rule, “National Emission Standards for Hazardous Air Pollutants: Paint Stripping and 

Miscellaneous Surface Coating Operations at Area Sources,” 40CFR63, Draft of September 6, 2007.
STAFF REPORT - Rule 321 Page K-8

September 20, 2010

Santa Barbara County APCD

New and Increased Recordkeeping and Reporting Impacts to the Owners and Operators (Sections R and S)

The District estimates that the average new costs for performing monthly recordkeeping will be about $1,000 

per facility per year for facilities becoming subject to Rule 321 for the first time (e.g., the facilities identified in 

Appendix B, Table 2). Staff estimate the average annual increased recordkeeping costs for the facilities listed 

in Appendix B, Table 1, will be $700 per facility. 

Facilities using aerosol products and claiming the Section B.9 exemption and sources using 55 gallons per year 

or less and claiming the Section B.15 exemption will need to maintain additional records on the solvent usage 

rates. The District anticipates that the administrative costs for substantiating these exemption claims will be 

$500 per facility per year. A stationary source that has several facilities that is keeping records for the PAR 

321.B.15 exemption will have higher recordkeeping costs compared to a stationary source with one facility.

There will likely be a slight increase in the administrative costs associated with preparing annual reports due to 

the change from quarterly to monthly recordkeeping and reporting. This increase only affects permitted 

facilities and the District estimates it will be on the order of $200 to $300 per facility.

District Impacts

There should be a minimal amount of application processing associated with the revised rules. The District has 

identified only one source that appears to need an Authority to Construct (ATC) and Permit to Operate (PTO) 

under the PAR 202.D.10.l provision for use of HFE-7100: Vandenberg Air Force Base. Staff has not identified 

any sources that will need an ATC or modified PTO due to SCM modifications required to comply with the 

PAR 321 requirements. Thus, the District is unaware of any pending applications to be submitted for 

equipment modifications due to the revised Rule 321 requirements.

The District anticipates that the majority of the staffing impacts from this rulemaking action will involve 

outreach and education efforts and enforcement activities. Inspection staff shall randomly spot-check 

unpermitted sources subject to the rule to ensure that they are complying with the appropriate provisions. These 

costs will be integrated into the District general compliance verification program.

Click here to return to the list of Appendices in the Staff Report.
STAFF REPORT - Rule 321 Page L-1

September 20, 2010

Santa Barbara County APCD

Appendix L

Santa Barbara County 

Flowchart Overviews of Key Provisions of Proposed Amended Rule 202 and Rule 321

Table 1. TABLE OF CONTENTS FOR FLOWCHARTS

Rule Section Figure Title Page

202.B.1, D.3, D.5, 

D.6, D.7, D.10.1, and 

D.12

Figure 1. Rule 202 Permit Exemptions for Solvent Cleaning Machines 

and Solvent Cleaning

L-3

202.U.1 and U.2 Figure 1 (cont.) L-4

202.U.3, U.4, and U.5 Figure 1 (cont.) L-5

321.B.1, B.2, B.3, 

B.4, B.5, and B.6

Figure 2. Rule 321, Section B, Exemptions for Solvent Cleaning 

Machines and Solvent Cleaning

L-6

321.B.7, B.8, B.9, and 

B.11

Figure 2 (cont.) L-7

321.B.12, B.13, B.14, 

B.15, and B.16

Figure 2 (cont.) L-8

321.B.17, B.18, B.19, 

and B.20.

Figure 2 (cont.) L-9

321.B.21, B.22, B.23, 

and B.24

Figure 2 (cont.) L-10

321.D Figure 3, Section D, General Operating Requirements L-11

321.E Figure 4, Section E, Additional Operating Requirements for Batch Vapor 

Cleaning Machines and In-Line Vapor Cleaning Machines

L-12

321.F Figure 5,Section F, Additional Operating Requirements for Gas-Path 

Solvent Cleaners

L-13

321.G.1, G.2, G.3, 

G.4, and G.5

Figure 6, Rule 321 Section G, General Equipment Requirements for 

Solvent Cleaning Machines

L-14

321.G.6, G.7, G.8, 

G.9, and G.10

Figure 6 (cont.) L-15

321.H Figure 7, Rule 321, Section H, Additional Equipment Requirements for 

Remote Reservoir Cold Cleaning Machines

L-16

321.I.1, I.2, I.4, I.5.a, 

I.5.b, and I.6

Figure 8, Rule 321, Additional Equipment Requirements for Batch Cold 

Cleaning Machines

L-17

321.I.3, I.4, I.5.a, 

I.5.b, I.6, and I.7

Figure 8 (cont.) L-18

321.J.1, J.2, J.3, J.4, 

and J.5

Figure 9, Rule 321, Section J, Additional Equipment Requirements for 

Batch Vapor Cleaning Machines

L-19

321.J.6, J.7, J.8, J.9, 

and J.10

Figure 9 (cont.) L-20

321.J.11 Figure 9 (cont.) L-21

321.K Figure 10, Rule 321, Section K, Additional Equipment Requirements for 

In-Line Cold Cleaning Machines

L-22

321.L.1, L.2, L.3, L4, 

L.5, and L.6

Figure L -11, Rule 321, Section L, Additional Equipment Requirements 

for In-Line Vapor Cleaning Machines

L-23

321.L.7, L.8, L.9, 

L.10, and L.11

Figure 11 (cont.) L-24

321.L.11 Figure 11 (cont.) L-25

321.M.1, Table 1, 

Category (a)

Figure 12, Rule 321, Section M, Requirements – Solvent Cleaning L-26
STAFF REPORT - Rule 321 Page L-2

September 20, 2010

Santa Barbara County APCD

Rule Section Figure Title Page

321.M.1, Table 1, 

Categories (b), (c), 

and (d)

Figure 12 (cont.) L-27

321.M.2 and M.3 Figure 12 (cont.) L-28

321.N and Q Figure 13, Rule 321, Section N, Emission Control System Requirements, 

and Section Q, Operation and Maintenance Plan

L-29

321.O Figure 14, Rule 321, Section O, Alternative Operating and Equipment 

Requirements for An Airless Solvent Cleaning Machine or An Air-Tight 

Solvent Cleaning Machine

L-30

321.P Figure 15, Rule 321, Section P, Test Methods L-31

321.R Figure 16, Rule 321, Section R, Recordkeeping Requirements L-32

321.S and T Figure 17, Rule 321, Section S, Reporting Requirements, and Section T, 

Compliance Schedule

L-33

321.C Figure 18, Overview of the Solvent Cleaning Machine Categories L-34

321.D, E, F, G, H, I, 

J, K, and L

Figure 19, Overview of the Rule 321 Equipment and Operating 

Requirement Sections for the Different Types of Solvent Cleaning 

Machines

L-35
STAFF REPORT - Rule 321 Page L-3

September 20, 2010

Santa Barbara County APCD

Figure 1. Rule 202 permit exemptions for solvent cleaning machines and solvent cleaning.

1 1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent. 2. Rule 202.D.10.l.1 includes the following compounds: dimethyl carbonate, methyl formate, HCFC-225ca, HCFC-225cb, HFC-43- 10mee, HFC-245fa, HFC-365mfc, HFE-7100 ((CF3)2CFCF2OCH3), and HFE-7100 (C4F9OC2H5). And Rule 202.D.10.l.2 addresses the use of tertiary-butyl acetate.

No Yes Is the Equipment, Activity, or Operation Covered by a Rule 202 Exemption, but Used as an ERC?

A Source Uses Solvent Application Equipment and/or Performs Solvent Operations.

Equipment Needs a Written Permit per Rule 201.

No (See 202.B.1.) Is the Equipment, Activity, or Operation Exempt by State Statutes? Yes

Is the Equipment, Activity, or Operation Exempt Under H&SC 42310? Submit a Written Request for Exemption to the APCO. (See 202.D.5. To Qualify as Temporary Equipment, Cumulative Emissions Cannot Exceed 1 Ton in Any Consecutive 12-Month Period (excluding CO), and the Equipment Cannot be Used More Than 60 Days during Any Consecutive 12-Month period.) Yes

Yes No

No

The Equipment, Activity, or Operation is Exempt from Rule 201. 1

(See Health and Safety Code 42310, Which Exempts Vehicles and Certain Repair and Maintenance Activities.)

(See 202.D.3. Health and Safety Code 42310 Exempts Vehicles and Certain Repair and Maintenance Activities (Also See 202.D.8), and Other Miscellaneous Items.) Is the Equipment Temporary?

Does the Equipment, Activity, or Operation, Involve a Modification? Does the Mod'n Qualify for the "De Minimis" Exemption?

(See 202.D.6. To Qualify for this Exemption the Modification Must Meet the Requirements Specified in this Section.) Maintain Records Yes Yes (See 202.D.6) No Are Actual Emissions from the Entire Stationary Source less than 1 Ton per Year? Submit a Written Request for an Exemption to the Control Officer and Maintain Records. Yes (See 202.D.7. To Qualify for this Exemption a Source Must Meet Other Specified Requirements.)

Is an Emission Control Device Attached to Exempt Equip't?

No

Yes (See 202.D.12)

Does A Source Use More than 1 Gallon per Year of Any One of the Compounds Identified in Rule 202.D.10.l.1 or 2?2 Equipment Needs a Written Permit per Rule 201.

No

No

No

Yes (See 202.D.10.l.1 and 2)

Click here to return to the

Flowchart Table of Contents.
STAFF REPORT - Rule 321 Page L-4

September 20, 2010

Santa Barbara County APCD

Click here to return to the

Flowchart Table of Contents.

For Each SCM, Is the Solvent's Initial Boiling Point Temperatures ≥ 302 °F or Is the Solvent ROC Content ≤ 2% by Weight?

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent. 2. If the owner or operator revises the method of operation to conform to Rule 321 provisions and the APCO concurs that the source has achieved compliance with the Rule 321 requirements, the solvent cleaning will no longer be subject to permitting. Situations may arise where a Rule 202.U.1 exemption is not available because the solvent cleaning does not comply with Rule 321, but is brought into compliance through a modification, conditional abatement order, variance, permit condition, or other means. In which case, the owner or operator may request that the District review and determine if a permit or permit exemption is warranted under the current circumstances where solvent cleaning has been brought into compliance and will remain in compliance with Rule 321 requirements.

Figure 1. (cont.)

1

1

Is the Source Using One or More Solvent Cleaning Machines (SCMs)? (See 202.U.2) Yes For Each SCM, Is it Using a Heated Solvent? No

Is the Source Performing Solvent Cleaning? Except as Otherwise Noted for a SCM or SCMs, No Written Permit is Necessary. Yes

Yes

(See 202.U.1, 202.U.3, 4 and 5)

Is an Unheated Solvent Used in a Non-Conveyorized Solvent Rinsing Container that has a Capacity of 1 Gallon or Less? (See 202.U.1) (See 202.U.1) Does the Solvent Cleaning Comply With Rule 321 Requirements? Yes Yes (See 202.U.) Is the Source’s Aggregate Emissions for the 202.U.1 Exemptions ≤ 10 Tons per Year per Stationary Source? The Solvent Rinsing Container is Exempt from Rule 201. The Solvent Rinsing Container Needs a Written Permit per Rule 201.

Yes No

No

No

2

(See 202.U.2.b, c, and d.ii)

(See 202.U.2.a)

No Yes

Is the Source’s Aggregate Emissions for the 202.U.2 Exemptions ≤ 10 Tons per Year per Stationary Source? Yes

The SCM or Group of SCMs Require) a Written Permit per Rule 201. The SCM or Group of SCMs is Exempt from Rule 201.

Such Solvent Wipe Cleaning May be Exempt by 202.U.3, 4, or 5.

Yes No No2 Is Solvent Wipe Cleaning Performed in Association with Solvent Rinsing?

For All SCMs at the Source in this Category, Is the Aggregate Liquid Surface Area of those SCMs > 10 Square Feet?

For Each SCM, Is the Solvent ROC Content ≤ 50 g/l? Yes For Each SCM, is its Liquid Surface Area < 1 Square Foot?

No (See 202.U.2.d.i)

No (See 202.U)

No The SCM(s) Require(s) a Written Permit per Rule 201.

No

(See 202.U.2.b and c)

(See 202.U.2.a, d.i, and d.ii) No Yes Yes
STAFF REPORT - Rule 321 Page L-5

September 20, 2010

Santa Barbara County APCD

Click here to return to the

Flowchart Table of Contents.

2

Figure 1. (cont.)

1 1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent. 2. If the owner or operator revises the method of operation to conform to Rule 321 provisions and the APCO concurs that the source has achieved compliance with the Rule 321 requirements, the solvent cleaning will no longer be subject to permitting. Situations may arise where a Rule 202.U.3 exemption is not available because the solvent cleaning does not comply with Rule 321, but is brought into compliance through a modification, conditional abatement order, variance, permit condition, or other means. In which case, the owner or operator may request that the District review and determine if a permit or permit exemption is warranted under the current circumstances where solvent cleaning has been brought into compliance and will remain in compliance with Rule 321 requirements. 3. Solvents meeting the requirements in 202.U.2.b or c or that have an ROC content ≤ 50 grams per liter do not contribute to the 55 gallons per year per stationary source permitting threshold aggregate figure.

Is the Source Performing Solvent Cleaning to Disinfect and Decontaminate Surfaces and Eq’t in Hospitals, Clinics, etc.?

(See 202.U.4. The Entire Description of the Solvent Cleaning Exempt by this Provision is More Extensive than the One Shown Here.) Yes Does the Solvent Cleaning Performed Meet the Definition of “Janitorial Cleaning” (Includes Graffiti Removal)? Yes (See 202.U.5) No

Yes Does the Source Perform Solvent Wipe Cleaning Operations? Is the Aggregate Solvent Wipe Cleaning Usage > 55 Gallons per Year per Stationary Source?3 (See 202.U.3) Does the Solvent Cleaning Comply with Rule 321 Requirements? No Is the Source’s Aggregate Emissions for the Individual 202.U.3, 4, or 5 Equipment Category ≤ to 10 Tons per Year per Stationary Source?

Yes No (See 202.U)

Yes

No (See 202.U.3) Yes

No2 No

Equipment/Operation Needs Written Permit per Rule 201

Yes Does the Source Perform Solvent Cleaning in a Category Not Covered in Rule 202.U.1, 202.U.3, 202.U.4, or 202.U.5?

The Solvent Cleaning Subject to Rule 202.U.3, 4, or 5 that is 10 ≤ Tons per Year Does Not Require a Written Permit.

Except as Otherwise Noted, the Equipment and/or Operation is Exempt from Rule 201.

The Solvent Cleaning Subject to 202.U.3, 4, or 5 that is > 10 Tons per Year Requires a Permit per Rule 201.

(See 202.U.3)

No
STAFF REPORT - Rule 321 Page L-6

September 20, 2010

Santa Barbara County APCD Does the Source Have a SCM that Employs a Solvent Containing a Halogenated HAP Solvent?

Figure 2. Rule 321, Section B, Exemptions for solvent cleaning machines and solvent cleaning.

1

Is the Solvent’s ROC and TAC Content ≤ 2%, by Weight?

(See 321.B.1.a and b)

The Solvent Cleaning Machine or the Solvent Cleaning is Exempt from Rule 321.

Is the Solvent Used to Clean Architectural Coating Application Equipment?

No

(See 321.B.2)

A Source Has a Solvent Cleaning Machine (SCM) and/or is Performing Solvent Cleaning.

2 Yes Maintain Records per Rule 321.R.1.a.1) and R.1.a.2) per Section R.3. If Requested, Make them available for Review. No Is the Solvent’s ROC Content > 950 Grams per Liter?5 Yes No Is a Dry Cleaning Operation Being Performed?

(See 321.B.3. Dry Cleaning Operations Subject to Rule 320 or the State Perchloroethylene Airborne Toxic Control Measure are Exempt from Rule 321.) Yes Is the Source Stripping Cured Coatings, Adhesives, Sealants, or Inks?

(See 321.B.4. Rule 321 Does Not Apply to the Stripping of Cured Coatings, Cured Adhesives, Cured Sealants, or Cured Inks [Except When Removing Such Cured Material from Spray Application Equipment].) Yes No

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent. 2. Section A, Applicability, indicates that the rule applies to any person who owns, operates, or uses any solvent cleaning machine or performs any solvent cleaning outside of a solvent cleaning machine during the production, repair, maintenance, or servicing of parts, products, tools, machinery, equipment, or in general work areas at stationary sources. 3. The Section B.5 provision prevails over the Section B.1 exemption. Thus, a SCM subject to and complying with 40 CFR, Part 63, Subpart T, is exempt irrespective that the unit uses a cleaning agent that contains more than 2 percent solvent that is a toxic air contaminant. 4. The rules listed in 321.B.6 include: Rule 325, Crude Oil Production and Separation. Rule 344, Petroleum Sumps, Pits and Well Cellars. Rule 326, Storage of Reactive Organic Compound Liquids. Rule 349, Polyester Resin Operations. Rule 330, Surface Coating of Metal Parts and Products. Rule 351, Surface Coating of Wood Products. Rule 337, Surface Coating of Aircraft or Aerospace Vehicle Parts and Products. Rule 353, Adhesives and Sealants. Rule 339, Motor Vehicle and Mobile Equipment Coating Operations. Rule 354, Graphic Arts. Rule 343, Petroleum Storage Tank Degassing. 5. Additional information on eligibility for this exemption is presented in Figure 12, Page L-27, footnote 3.

(See 321.B.5) Is the SCM Subject to 40 CFR, Part 63, Subpart T (i.e., the Halog’d HAP Solvent Concentration is > 5%, by Wt)? Yes Yes

No

(See 321.B.5)

1

No

No Does the SCM Comply with the 40 CFR, Part 63, Subpart T Req’s? Is the Source Using Equip’t or Performing an Operation Subject to or Specifically Exempted by a Rule Listed in 321.B.6?4

Yes3

No

(See 321.B.6) Yes

Yes

No

(See 321.B.1.c)

Click here to return to the

Flowchart Table of Contents.
STAFF REPORT - Rule 321 Page L-7

September 20, 2010

Santa Barbara County APCD

Click here to return to the

Flowchart Table of Contents.

1

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent. 2. Rule 321.B.8 provides exemptions from the 321.H.7, 321.I.7, 321.K.6, and 321.M.1 provisions for the: a. Cleaning of solar cells, laser hardware, scientific instruments, high-precision optics, telescopes, microscopes, avionic equipment, and aerospace and military fluid systems; and b. Cleaning in laboratory tests and analyses, including quality assurance and quality control applications, or bench scale or short-term (less than 2 years) research and development projects; and c. Cleaning of cotton swabs to remove cottonseed oil before cleaning of high-precision optics. d. In addition, the 321.H.7, 321.I.7, and 321.K.6 provisions do not apply to SCMs employed with solvents having 900 grams of reactive organic compound per liter of material or less used in the manufacturing, repairing, or maintenance of electrical apparatus components, electronic components, satellites, satellite components, aerospace vehicles, aerospace vehicle components, aerospace vehicle payloads, aerospace vehicle payload components, medical devices, or silicone manufacturing. 3. Rule 321.B.11 provides exemptions from the 321.D.9 and 321.M.2.c prohibitions on solvent atomization for:  Cleaning of the nozzle tips of automated spray equipment systems, except for robotic systems.  Cleaning with hand-held spray bottles, squirt bottles, and other closed containers having a capacity of one liter or less.  Cleaning of gas turbines or jet engines using a gas-path solvent cleaner.

Figure 2. (cont.)

1

Is Janitorial Cleaning Being Performed? Yes Is the Source Performing Specialized Cleaning that is Listed in 321.B.8?2 (See 321.B.8)

No

(See 321.B.7)

Yes

Is Solvent Cleaning With Aerosol Products Being Performed? Yes Is the Facility Using More than 160 Fluid Ounces of Aerosol Products per day?

Yes No

(See 321.B.9)

No The Provisions of Sections H.7, I.7, and K.6 (and, for SCMs, Possibly M.1) Shall Not Apply.

Such Solvent Cleaning is Exempt from Rule 321.

Maintain Records per Rule 321.R.2 and R.3.

The Provisions of Sections D.9, M.1, & Section M.2.c Shall Not Apply.

Do the Aerosol Products Comply with the CCR, Title 17, §94507 et seq. VOC Limits? No

No Yes (See 321.B.10)

Is the Source Cleaning Application Equipment Used to Apply a Coating on a Satellite or to Apply a Radiation-Effect Coating? Yes No (See 321.B.11) The Provisions of Section M.1, Table 1, Category (c) Shall Not Apply. Is the Source Cleaning Equip’t or Performing an Operation Listed in 321.B.11?3 The Prohibitions on Solvent Atomization in Section D.9 and M.2.c Shall Not Apply. Yes

2

No

(See 321.B.9.a) (See 321.B.9.c) (See 321.B.9.b)

(See 321.B.9)
STAFF REPORT - Rule 321 Page L-8

September 20, 2010

Santa Barbara County APCD

Figure 2. (cont.)

1

2

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent. 2. Solvents with a reactive organic compound content of 50 grams per liter of material or less do not count towards the exemption nonapplicability threshold limit. 3. 321.B.16.a – f include the cleaning of:  ultraviolet lamps used to cure ultraviolet inks coatings, adhesives, or resins.  mold release compounds from molds.  aerospace assembly and subassembly surfaces that are exposed to strong oxidizers or reducers such as nitrogen tetroxiode, liquid oxygen, or hydrazine.  paper gaskets.  clutch assemblies where rubber is bonded to metal by means of an adhesive.  hydraulic actuating fluid from filters and filter housings.

Does the Solvent Cleaning Involve the De- Icing of Aircraft or Aero- Space Vehicles? Yes No (See 321.B.12) Such Solvent Cleaning is Exempt from Rule 321. Does the Solvent Cleaning Involve the Atomization of a Solvent with an ROC Content ≤ 50 Grams per Liter?

No The Provisions of Section D.9 Shall Not Apply. (See 321.B.13)

Is the Source Performing Solvent Cleaning to Disinfect and Decontaminate Surfaces and Eq’t in Hospitals, Clinics, etc.?

(See 321.B.14. The Entire Description of the Solvent Cleaning Exempt by this Provision is More Extensive than the One Shown Here.) No Yes Such Solvent Cleaning is Exempt from Rule 321. (See 321.B.15) Yes Is the Source Performing Solvent Cleaning Operations? Is the Solvent Cleaning Subject to Rule 321 (e.g., Sections D, M.2 &/or M.3)?

Yes Is the Net Aggregate Amount of Solvent Used for Solvent Cleaning at a Stationary Source ≤ 55 Gallons per Year?2 No Maintain Records per Rule 321.R.2 and R.3. No The Provisions of Section M.1 Shall Not Apply. No Is the Source Performing Solvent Cleaning of any Item Listed in 321.B.16.a - f?3 Yes No The Provisions of Section M.1 Shall Not Apply. (See 321.B.16.a - f)

Is the Source Performing Wipe Cleaning to Remove Crude Oil/Residue on Offshore Platforms? Is the Solvent ROC Content ≤ 800 g/l and is the Solvent’s ROC Composite Partial Pressure ≤ 8 mm of Hg @ 20oC? The Provisions of Section M.1 Shall Not Apply. (See 321.B.16.g) Yes Yes No No

3

Yes

Yes

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Flowchart Table of Contents.
STAFF REPORT - Rule 321 Page L-9

September 20, 2010

Santa Barbara County APCD

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Flowchart Table of Contents.

Figure 2. (cont.)

1 1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent. 2. The activities identified in 321.B.17 include: a. Cleaning associated with the manufacturing of nuts and bolts designed for automotive racing applications. b. Cleaning of precision-lapped mechanical seals in pumps that handle liquefied gasses.

3

Is the Source Cleaning Equip’t or Performing an Operation Listed in 321.B.17?2 Is the Solvent ROC Content ≤ 900 g/l and is the Solvent’s ROC Composite Partial Pressure ≤ 5 mm of Hg @ 20oC? The Solvent Content Limit of 50 g/l of ROC or Less Provisions in Sections H.7, I.7, and K.6 Shall Not Apply. Yes No

Yes (See 321.B.17)

Does the Source have One or More Batch Vapor SCMs? Is the Batch Vapor SCM’s Capacity < 2 Gallons or is the SCM’s Solvent/Air Interface Area < 1 Square Foot? (See 321.B.18) Yes For All Batch Vapor SCMs at the Source that Have a Capacity < 2 Gallons or a Solvent/Air Interface Area < 1 Square Foot, Is the Aggregate ROC Emissions < 55 lbs/month per Stationary Source? Yes The SCM or Group of SCMs is Exempt from Rule 321, Section J.11.a, d, and e. Any Person Claiming this Exemption Shall Maintain Records per R.1 and R.3.

Yes No No No

Is a Solvent Used for Purposes Other than Cleaning?

No

(See 321.B.19)

Does the Source have One or More Batch Vapor SCMs that Are Only Used to Clean Electronic Components? Is the Batch Vapor SCM’s Installation Date Before January 1, 2007 and: 1) the SCM’s Capacity < 2 Gallons or 2) the SCM’s Solvent/Air Interface Area < 4.40 Square Feet? (See 321.B.20 and 321.B.20.c or 321.B.24 and 321.B.24.a) Yes For All Such Batch Vapor SCMs at the Source, Is the Aggregate ROC Emissions ≤ 188 lbs/month per Stationary Source? The SCM(s) is (are) Exempt from Rule 321, §§ E.7, J.11.a, d, and e and §J.8's Freeboard Ratio of 1.0 Requirements (But the Freeboard Ratio Needs to be 0.75 or Greater).

Yes

No No No

(See 321.B.20.a and 321.B.20.b) (See 321.B.20.d) For All Such Batch Vapor SCMs at the Source, Is the Equipment Subject to a Permit to Operate?

Yes No

(See 321.B.20.e)

No

Yes

4

Such Solvent Use is Exempt from Rule 321.

Yes

5
STAFF REPORT - Rule 321 Page L-10

September 20, 2010

Santa Barbara County APCD

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Flowchart Table of Contents.

Figure 2. (cont.)

1 1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent.

4 (See 321.B.21) Is the Source a Medical Device Manufacturer that Performs Incidental Product Cleaning During QA/QC Tests? Yes Is the QA/QC Test Done in an Unheated Batch SCM Employing a Solvent with an ROC Content ≤ 900 g/l? The SCM or Group of SCMs is Exempt from Rule 321, Section I.3, I.4, and I.7. Yes No No

Is the Source Performing Metal Lift-Off Operations or Performing Other Semiconductor or Micro- electromechanical Device Manufacturing? Yes No

(See 321.B.22)

Except as Otherwise Noted, the SCM and/or Solvent Cleaning is Subject to Rule 321.

Manufacturing Processes Involving Metal Lift-Off, Thin Film Deposition, Vacuum Deposition, and Dry Etching Operations; Including Any Maintenance Activities Associated With Such Operations; are Exempt From Does Rule 321. the Source Use an SCM that Has a Sump Capacity of 8 Gallons or Less? Is the Sump Easily Removed from the SCM? Does the Operator Pour the Solvent from the Sump Directly into a Bulk Storage Container? The Draining and Filling Provisions of Rule 321.D.12 Do Not Apply.

Yes Yes No No No

(See 321.B.23)

5

Does the Unit Have: 1. A Freeboard Ratio of 0.75 or Greater, and 2. A Freeboard Refrigeration Device Meeting the 321.B.24.c Requirements, and 3. A Superheated Vapor Zone Meeting the Requirements in 321.B.24.d? (See 321.B.24) The Batch Vapor SCM is Exempt from the 321.J.8 Requirement to Have a Freeboard Ratio of 1.0 No Yes

Yes

(See 321.B.24.b, c, and d)
STAFF REPORT - Rule 321 Page L-11

September 20, 2010

Santa Barbara County APCD

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Figure 3. Rule 321, Section D, General operating requirements.

1

(See 321.D.1)

Install, Maintain, and Operate any Solvent Cleaning Machine, Ventilation System, and/or Control Equipment Consistent with the Manufacturer’s Specifications.

End of General Operating Requirements.

(See 321.D.2) All Solvent and Waste Solvent Materials Shall be Stored and Disposed of in Proper Containers that Are Covered. After Distillation Recovery, the Solvent Residue Shall Not be > 20% of ROC by Weight.

The Cleaning of Porous or Absorbent Materials is Prohibited. This provision Shall not Apply to Paper Gaskets, Paper Filters, and Medical Devices. Containers Shall be Leak-Free and the Equipment Shall not be Have Any Leaks, Cracks, Tears, or Holes. Repair any Such Defect Within 1 day or Remove the Solvent from the Unit. SCMs Shall not be Operated When Leaking. Remove Covers Only to Process Work or to Perform Monitoring, Inspections, Maintenance, or Repairs. Solvent Cleaning Machines Shall Not be Operated When Performing Maintenance or Repairs.

Is a Gas- Path or Continuous Web Cleaning Machine Used?

(See 321.D.6-D.8)

Yes

Do Not Overfill Solvent Containers.

No

(See 321.D.3)

(See 321.D.4)

(See 321.D.5)

(See 321.D.6) Minimize Solvent Carry-Out by Complying with the Prescribed Methods.

(See 321.D.7) When Using the Solvent Flow Cleaning Method, Direct the flow Downward. Use of any Flexible Hose or Flushing Device Shall be Within the Freeboard Area Only.

(See 321.D.8) When Using a Solvent Flow Cleaning Method, Solvent Flow Shall Not be Used in a Manner Such that Liquid Solvent Splashes Outside the Container.

Do Not Atomized Solvent Unless Venting to an Emission Control System.

(See 321.D.9)

(See 321.D.10) Clean Up Solvent Spills Immediately. (See 321.D.11) Transfer Solvents Properly. (See 321.D.12)

(See 321.D.13) Do Not Direct Fans Toward Solvent Cleaning Machine Openings.

When Using a Solvent Cleaning Machine or Performing any Solvent Cleaning, Comply with the Following Requirements.

(See 321.D)

A Source Has a Solvent Cleaning Machine and/or is Performing Solvent Cleaning that is Subject to Rule 321.

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent.
STAFF REPORT - Rule 321 Page L-12

September 20, 2010

Santa Barbara County APCD

Figure 4. Rule 321, Section E, Additional operating requirements for batch vapor cleaning machines and in-line vapor cleaning machines.

1

(See 321.E.6) Does The Unit Use Solvent Flow (Spray)?

No

End of Additional Operating Requirements for Batch Vapor Cleaning Machines and In-Line Vapor Cleaning Machines.

A Source Has a Batch Vapor Cleaning Machine or an In-Line Vapor Cleaning Machine that is Subject to Rule 321. When Using a Vapor Cleaning Machine, Comply with the Following Requirements.

(See 321.E)

During Startup, Turn On the Primary Condenser Before Turning On the Sump Heater.

(See 321.E.1) Use Idling Mode and Downtime Mode Covers. (See 321.E.2) During Shutdown, Allow the Solvent Vapor Layer to Collapse Before Turning Off the Condenser. (See 321.E.3)

Keep the Workload in the Vapor Zone for at Least 30 Seconds or Until Condensation Ceases. Allow Parts to Dry in the Solvent Cleaning Machine.

(See 321.E.4)

(See 321.E.6)

(See 321.E.5)

Keep the Solvent Spray at Least 10 Centimeters Below the Solvent/Air Interface. Yes

Do Not Place Oversize Workloads in the Unit. (See 321.E.7)

Does The Unit Have A Water Separator?

(See 321.E.8) (See 321.E.8) The Water Separator’s Output Streams Shall Have No Visible Cross-Contamination. Yes No

Does the Unit Have Superheated Vapor Zone?

Determine and Use the Manufacturer’s Specifications for Proper Dwell Time and Ensure that the Temperature Meets the Minimum Requirements

Yes No

(See 321.E.9) (See 321.E.9)

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent.

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STAFF REPORT - Rule 321 Page L-13

September 20, 2010

Santa Barbara County APCD

Figure 5. Rule 321, Section F, Additional operating requirements for gas-path solvent cleaners.

1

A Source Has a Gas-Path Solvent Cleaner that is Subject to Rule 321. When Using a Gas-Path Solvent Cleaner, Comply with the Following Requirements. (See 321.F)

Drain Cleaned Parts or Equipment Until Dripping Ceases. (See 321.F.1)

End of Additional Operating Requirements for Gas-Path Solvent Cleaners.

Remove Covers Only to Process Work or to Perform Monitoring, Inspections, Maintenance, or Repairs. (See 321.F.2)

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent.

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STAFF REPORT - Rule 321 Page L-14

September 20, 2010

Santa Barbara County APCD

Figure 6. Rule 321, Section G, General equipment requirements for solvent cleaning machines.

1

(See 321.G.1)

(See 321.G.2) Is the Unit a Remote Reservoir Cold Cleaning Machine Employing a Low Volatility Solvent?

A Source has a Solvent Cleaning Machine that is Subject to Rule 321. The Source Shall Ensure that the Solvent Cleaning Machine is Equipped with the Following.

A Container for the Solvent.

(See 321.G)

A Cover or (Other Apparatus) to Cover the Solvent Container.

(See 321.G.2) No Yes

Is the Source Using a Gas-Path Solvent Cleaner Employing a Solvent Having an ROC Content ≤ 50 Grams per Liter?

Yes A Device or (Other Apparatus) for Draining Parts Such that the Drained Solvent is Returned to the Solvent Container.

No (See 321.G.3) (See 321.G.3)

A List of the Operating Requirements that is Posted (or Kept) Near the Unit to be Used as a Reference to the Operator.

(See 321.G.4)

Is Solvent Agitation Used? A System Which Uses an Acceptable Agitation Device/Method (i.e., a Pump, Mixer, or No Ultrasonics) With no Visible Splashing.

(See 321.G.5) (See 321.G.5) Yes

1

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent.

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STAFF REPORT - Rule 321 Page L-15

September 20, 2010

Santa Barbara County APCD

Figure 6. (cont.)

1

1

Is Solvent Flow Used?

No

(See 321.G.6)

Yes

A Flexible Hose or Flushing Device that Produces Only a Continuous Fluid Stream. Is the Unit Conveyorized or an Enclosed Type Such that the Spraying is Done in a Sealed Area?

Yes No A Spraying Device that Produces An Atomized or Shower Type Spray May be Used.

(See 321.G.6)

(See 321.G.7) Is the Unit Equipped with a Hood, Enclosure, or Lip Exhaust? Yes A Blower (or Fan) that Does not Cause an Excessive Draft.

(See 321.G.7) No

Does the Unit Have a Lip Exhaust that Was Installed After July 19, 1997? Yes An Emission Control System that Meets the Section N Requirements.

(See 321.G.8) No

(See 321.G.8)

Maintain an Acceptable Workroom Draft Rate. (See 321.G.9) Is an Automated Parts Handling System Used? A System that Does not Move the Parts too Fast. No (See 321.G.10) (See 321.G.10)

Yes End of General Equipment Requirements for Solvent Cleaning Machines.

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent.

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STAFF REPORT - Rule 321 Page L-16

September 20, 2010

Santa Barbara County APCD

Figure 7. Rule 321, Section H, Additional equipment requirements for remote reservoir cold cleaning machines.

1

A Source has a Remote Reservoir Cold Cleaning Machine that is Subject to Rule 321. (See 321.H)

(See 321.H.1)

(See 321.H.2)

Is a Low Volatility Solvent Used?

Yes

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent. 2. This provision becomes effective one year from the date of the revised rule adoption.

A Cover or (Other Apparatus, Such as a Valve or a Drain Plug) to Cover the Solvent Container. (See 321.H.4 and H.6)

Does The Unit Have a Freeboard Height of 6 Inches or Greater?

Yes

If the Solvent is: 1) Heated Above 122 Degrees Fahrenheit, 2) Agitated, or 3) A High Volatility Solvent, Does the Unit Have a Freeboard Ratio of 0.75 or Greater?

Does the Unit Have an Emission Control System that Meets Section N Requirements?2

If the Solvent is Insoluble in Water, is the Unit Equipped with a Water Layer that is at Least 1 Inch Deep?

The Source Shall Ensure that the Remote Reservoir Cold Cleaning Machine is Equipped with the Following. A Sloped Sink (or Work Area) that Drains the Solvent into the Solvent Container. A Single Drain not Exceeding 4.4" in Diameter (15.5 Square Inches). (See 321.H.3) No

No

No (See 321.H.6.b) An Emission Control System that Meets the Section N Requirements. No or the Solvent Is Soluble in H2O Yes Yes or 1), 2), & 3) Above do Not Apply (See 321.H.7)

(See 321.H.5) (See 321.H.6.a)

No (See 321.H.7) Solvent that Contains no More than 50 Grams per Liter.

2 End of Additional Equipment Requirements for Remote Reservoir Cold Cleaning Machines.

Yes

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STAFF REPORT - Rule 321 Page L-17

September 20, 2010

Santa Barbara County APCD

Figure 8. Rule 321, Section I, Additional equipment requirements for batch cold cleaning machines.

1

A Source has a Batch Cold Cleaning Machine Other than a Remote Reservoir Batch Cold Cleaning Machine that is Subject to Rule 321.

2 The Source Shall Ensure that the Batch Cold Cleaning Machine is Equipped with the Following. (See 321.I)

(See 321.I.1) Is the Unit Being Used With a High Volatility Solvent? A Cover that is Easily Opened and Closed. (See 321.I.1) Yes

Is the Unit Mechanized (e.g., a Cross-Rod or Ferris Wheel Type)?

(See 321.I.1)

A Downtime Mode Cover. Yes

An Equipment Configuration Which Allows the Parts Draining to be Performed Within the Unit and Under the Cover.

(See 321.I.2)

No

Does the Unit Have a Freeboard Ratio of 0.75 or Greater? No

2

Yes An Emission Control System that Meets the Section N Requirements.

End of Additional Equipment Requirements for this Category of Batch Cold Cleaning Machines. 1

(See 321.I.4)

(See 321.I.5.b) (See 321.I.5.a)

Yes (See 321.I.6)

No

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent. 2. A remote reservoir cold cleaning machine that uses an enclosed container that is accessible for dipping or soaking parts is also considered to be a batch cleaning machine and shall comply with the Section I requirements.

If the Solvent is Insoluble in Water, is the Unit Equipped with a Water Layer that is at Least 1 Inch Deep? A Mark for the Maximum Fill Level. (This Does Apply if the Unit is Equipped with a Complying Water Layer or an Emission Control System that Meets the Section N Requirements.) No or the Solvent Is Soluble in H2O

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STAFF REPORT - Rule 321 Page L-18

September 20, 2010

Santa Barbara County APCD

Figure 8. (cont.)

1

1

Does the Unit Have a Freeboard Height of 6 Inches or Greater? No

If the Solvent is Insoluble in Water, is the Unit Equipped with a Water Layer that is at Least 1 Inch Deep?

Does the Unit Have a Freeboard Ratio of 0.5 or Greater? No Yes

(See 321.I.3)

(See 321.I.3) (See 321.I.3)

No

An Emission Control System that Meets the Section N Requirements.

End of Additional Equipment Requirements for Batch Cold Cleaning Machines.

(See 321.I.5.b)

A Mark for the Maximum Fill Level. (This Does Apply if the Unit is Equipped with a Complying Water Layer or an Emission Control System that Meets the Section N Requirements.)

Does the Unit Have an Emission Control System that Meets Section N Requirements?2 No Yes

(See 321.I.7)

Does the Unit Have a Freeboard Ratio of 0.75 or Greater?

(See 321.I.4) (See 321.I.6)

Is the Solvent Heated Above 122 Degrees Fahrenheit?

2

Is the Low Volatility Solvent Agitated?

Yes No (See 321.I.4) No Yes

Yes

Yes (See 321.I.5.a) Yes

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent. 2. This provision becomes effective one year from the date of the revised rule adoption.

No or the Solvent Is Soluble in H2O Solvent that Contains no More than 50 Grams per Liter.

2

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STAFF REPORT - Rule 321 Page L-19

September 20, 2010

Santa Barbara County APCD

Figure 9. Rule 321, Section J, Additional equipment requirements for batch vapor cleaning machines.

1

A Source has a Batch Vapor Cleaning Machine that is Subject to Rule 321. The Source Shall Ensure that the Batch Vapor Cleaning Machine is Equipped with the Following. (See 321.J)

Is the Unit Equipped with a Top Enclosure?

A Rolling, Sliding, or Guillotine Type Cover that is Easily Opened and Closed w/o Disturbing the Vapor Zone.

No Yes Is the 1) Solvent/Air Interface < 10.8 ft

2

, and 2) Is the Cover Designed to be Easily Opened w/o Disturbing the Vapor Zone, and 3) the Cover Opened Only When the Condenser is Operative or the Unit is Shut Down?

Yes No

(See 321.J.1) (See 321.J.1.a, b, and c)

Is the Unit Mechanized (e.g., a Cross-Rod or Ferris Wheel Type)?

(See 321.J.2)

Idling and Downtime Mode Covers. Yes No

(See 321.J.3 and 4) A Primary Condenser With an Automatic Condenser Flow Switch.

(See 321.J.5) A Vapor Level Control Device With an Automatic Sump Heat Shut Off Feature.

1

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent.

(See 321.J.1)

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STAFF REPORT - Rule 321 Page L-20

September 20, 2010

Santa Barbara County APCD No

Is it On or After One Year from the Date of Revised Rule Adoption? Yes

Yes

No No An Emission Control System that Meets the Requirements Ye of Section N Is Required. s

(See 321.J.10)

1

Is Solvent Flow Used?

Figure 9. (cont.)

1

(See 321.J.6)

A Spray Pump Control Switch (or Equivalent) Which Allows Pump Operation Only if the Solvent Vapor Level is at the Proper Level. Yes

An Automatic Shut Off Device that Shuts Off the Sump Heat if the Liquid Solvent Level is Too Low.

No

(See 321.J.7)

Does the Unit Have a Freeboard Ratio of 1.0 or Greater?2

(See 321.J.8) Does the Unit Have a Freeboard Ratio of 0.75 or Greater?

2

Is the Solvent/Air Interface Equal to or Greater than 10.8 ft

2

? Yes

Does the Unit Have a Compliant Freeboard Refrigeration Device?

(See 321.J.9)

(See 321.J.9.a)

No

Does the Unit Have an Enclosed Design? No

An Emission Control System that Meets the Requirements of Section N Is Required.

(See 321.J.9.b) No Yes Yes (See 321.J.10)

(See 321.J.8) (See 321.J.8 )

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent. 2. This provision becomes effective one year from the date of the revised rule adoption.

(See 321.J.6)

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STAFF REPORT - Rule 321 Page L-21

September 20, 2010

Santa Barbara County APCD

2

Figure 9. (cont.)

1

Is It On or After One Year from the Date of Revised Rule Adoption?

No

End of Additional Equipment Requirements for Batch Vapor Cleaning Machines.

(See 321.J.11)

Is the Unit Being Used with a Solvent Having an ROC Content > 50 Grams per Liter?2

Yes

No Does the Unit Have an Emission Control System that Meets Section N Requirements?2

Yes

Yes No (See 321.J.11)

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent. 2. This provision becomes effective one year from the date of the revised rule adoption.

An Automatic Parts Handling System, Circumferential Trough, Water Separator, Freeboard Refrigeration Device, and a Superheated Vapor Zone.

2

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STAFF REPORT - Rule 321 Page L-22

September 20, 2010

Santa Barbara County APCD

Figure 10. Rule 321, Section K, Additional equipment requirements for in-line cold cleaning machines.

1

A Source has an In-Line Cold Cleaning Machine that is Subject to Rule 321. The Source Shall Ensure that the In-Line Cold Cleaning Machine is Equipped with the Following. (See 321.K)

(See 321.K.1) A Rotating/Tumbling Basket (or Other Means) to Prevent Liquid and/or Vapor Solvent from Being Carried Out.

Minimized Openings Complying with Rule 321, Section K.2.

Is the Unit a Continuous Web Cleaning Machine? Yes

Downtime Mode Covers.

Does the Part Completely Occupy the Entry and Exit Ports When the Unit is Idle? No

(See 321.K.2)

(See 321.K.5)

Yes

End of Additional Equipment Requirements for In- Line Cold Cleaning Machines.

Does the Unit Have a Freeboard Ratio of 0.75 or Greater? (See 321.K.4) No

An Emission Control System that Meets the Section N Requirements. Yes

Does the Unit Have an Emission Control System that Meets Section N Requirements?2 No

(See 321.K.6)

Yes

No (See 321.K.3) (See 321.K.3) (See 321.K.3)

Solvent that Contains no More than 50 Grams per Liter.

2

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent. 2. This provision becomes effective one year from the date of the revised rule adoption.

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STAFF REPORT - Rule 321 Page L-23

September 20, 2010

Santa Barbara County APCD

Figure 11. Rule 321, Section L, Additional equipment requirements for in-line vapor cleaning machines.

1

A Source has an In-Line Vapor Cleaning Machine that is Subject to Rule 321. The Source Shall Ensure that the In-Line Vapor Cleaning Machine is Equipped with the Following. (See 321.L)

(See 321.L.1) A Rotating/Tumbling Basket (or Other Means) to Prevent Liquid and/or Vapor Solvent from Being Carried Out.

Minimized Openings Complying with Rule 321, Section L.2.

Is the Unit a Continuous Web Cleaning Machine? Yes

Idling and Downtime Mode Covers.

Does the Part Completely Occupy the Entry and Exit Ports When the Unit is Idle? No

(See 321.L.2)

No

(See 321.L.3)

Yes

(See 321.L.3)

(See 321.L.3)

(See 321.L.4 and 5) A Primary Condenser With an Automatic Condenser Flow Switch.

(See 321.L.6) A Vapor Level Control Device With an Automatic Sump Heat Shut Off Feature.

1

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent.

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STAFF REPORT - Rule 321 Page L-24

September 20, 2010

Santa Barbara County APCD

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Figure 11. (cont.)

1

1

Is Solvent Flow Used?

(See 321.L.7)

A Spray Pump Control Switch (or Equivalent) Which Allows Pump Operation Only if the Solvent Vapor Level is at the Proper Level. Yes

An Automatic Shut Off Device that Shuts Off the Sump Heat if the Liquid Solvent Level is Too Low.

No

(See 321.L.8)

(See 321.L.9)

No

Is it On or After One Year from the Date of Revised Rule Adoption? No Yes

No (See 321.L.10.a) Does the Unit Have a Freeboard Ratio of 1.0 or Greater?2 Does the Unit Have a Freeboard Ratio of 0.75 or Greater? (See 321.L.9) (See 321.L.9) Is the Unit Equipped with a Freeboard Refrigeration Device that Meets the Requirements of Section L.10.a? An Emission Control System that Meets the Section N Requirements.

Yes No Yes Yes (See 321.L.10.b)

Is it On or After One Year from the Date of Revised Rule Adoption? Yes

2

(See 321.L.11)

End of Additional Equipment Requirements for this Category of In-Line Vapor Cleaning Machines.

No

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent. 2. This provision becomes effective one year from the date of the revised rule adoption.
STAFF REPORT - Rule 321 Page L-25

September 20, 2010

Santa Barbara County APCD

Figure 11. (cont.)

1

2

No

End of Additional Equipment Requirements for In- Line Vapor Cleaning Machines.

Is the Unit Being Used with a Solvent Having an ROC Content > 50 Grams per Liter? Does the Unit Have an Emission Control System that Meets Section N Requirements?2

Yes No

An Automatic Parts Handling System, Circumferential Trough, Water Separator, Freeboard Refrigeration Device, and a Superheated Vapor Zone.

2

(See 321.L.11) Yes

(See 321.L.11)

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent. 2. This provision becomes effective one year from the date of the revised rule adoption.

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STAFF REPORT - Rule 321 Page L-26

September 20, 2010

Santa Barbara County APCD

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Does the Solvent Cleaning Operation Constitute Product Cleaning During a Manufacturing Process or Surface Preparation for a Coating Application?

No

The General Limit Applies. The Solvent Used shall not Contain More than 50 Grams of Reactive Organic Compound per Liter of Material.

(See Table 1, Category (a)(i))

Yes

Is the Solvent Cleaning Operation for 1) Electrical Apparatus Components or Electronic Components or 2) Medical Devices or Pharmaceuticals, or 3) Silicone Manufacturing? The Solvent Used shall not Contain More than 900 Grams of Reactive Organic Compound per Liter of Material.

Yes

No

(See Table 1, Categories (a)(ii), (a)(iii), and (a)(iv))

1

In Lieu of Complying With the Section M.1, Table 1 Limits, Is the Source Employing an Emission Control System per Section N?

No

Figure 12. Rule 321, Section M, Requirements – solvent cleaning.

1, 2

A Source is Performing Solvent Cleaning that is Subject to Rule 321. The Source Shall Ensure that any Solvent Cleaning it is Performing that is Not Exempt from Rule 321 Meets the Following Requirements. (See 321.M.1)

(See 321.M)

(See 321.M.1, Table 1, Category (a))

(See 321.M.1, Table 1, Category (a))

Comply with the Section N and Section Q Requirements. Yes

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent. 2. The Section M provisions become effective one year from the date of the revised rule adoption.

(Continued on Page L-28) 2
STAFF REPORT - Rule 321 Page L-27

September 20, 2010

Santa Barbara County APCD

Figure 12. (cont.)

1, 2

Is the Solvent Cleaning in the Category of “Repair Cleaning” or “Maintenance Cleaning”?

No

The General Limit Applies. The Solvent Used Shall not Contain More than 50 Grams of Reactive Organic Compound per Liter of Material.

Yes

Does the Solvent Cleaning Involve the Cleaning of: 1) Electrical Apparatus Components or Electronic Components, or 2) Medical Devices or Pharmaceuticals, or 3) Silicone Manufacturing? The Solvent Used shall not Contain More than 900 Grams of Reactive Organic Compound per Liter of Material.

Yes No

1

Does the Solvent Cleaning Involve the Cleaning of Coating Application Equipment? Yes

The Solvent Used Shall not Contain More than 950 Grams of Reactive Organic Compound per Liter of Material.

3

(See Table 1, Category (b)(i))

(See Table 1, Categories (b)(ii), (b)(iii), and (b(iv))

(See 321.M.1, Table 1, Category (b))

(See 321.M.1, Table 1, Category (b))

(See 321.M.1, Table 1, Category (c))

No

Does the Solvent Cleaning Involve the Cleaning of the Following Items or Equipment or their Components: 1) Aerospace Vehicles; 2) Aerospace Vehicle Payloads or Satellites; or 3) Aerospace Vehicle, Aerospace Vehicle Payload, or Satellite: a) Transport Equipment, or b) Support Processing Equipment?

(See Table 1, Category (c)) (See 321.M.1, Table 1, Category (d))

Yes

The Solvent Used shall not Contain More than 900 Grams of Reactive Organic Compound per Liter of Material. No (See Table 1, Category (d))

2 1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent. 2. The Section M provisions become effective one year from the date of the revised rule adoption. 3. If the coatings application equipment is used to apply architectural coatings, use of a solvent with a 950 g/l or less ROC content makes such solvent cleaning eligible for the Rule 321.B.2 exemption.

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STAFF REPORT - Rule 321 Page L-28

September 20, 2010

Santa Barbara County APCD

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Flowchart Table of Contents.

2

Does the Solvent Cleaning Involve the Cleaning of Spray Application Equipment?

When Using a Solvent 1) for Purposes Other than Cleaning Spray Application Equipment, and 2) that Has an ROC Content > 50 Grams per Liter, Employ Devices and/or Cleaning Methods Listed in Section M.2 (e.g., Wipe Cleaning, Hand- Held Bottles, or Solvent Flow, Dip, or Flush Method Using Collection Equipment).

(See 321.M.2)

Does the Solvent Have an ROC Content > 50 Grams per Liter?

Yes No Yes No An Enclosed System (or APCO-Approved Equivalent Equipment) Shall be Used.

(See 321.M.3) (See 321.M.3)

End of Section M Requirements for Solvent Cleaning.

(See 321.M.3)

Figure 12. (cont.)

1, 2 1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent. 2. The Section M provisions become effective one year from the date of the revised rule adoption.
STAFF REPORT - Rule 321 Page L-29

September 20, 2010

Santa Barbara County APCD

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Figure 13. Rule 321, Section N, Emission control system requirements, and Section Q, Operation and maintenance plan.

1

(See 321.N) A Source has an Emission Control System that is Required by Sections D.9, G.8, and/or T.2.b.4 or a Control System that is Being Used as an Alternative Compliance Method as Provided for in Rule 321. The Source shall Ensure that the Following Requirements are Met. Overall Efficiency Equal to or Greater than 85 Percent in Reducing ROCs and TACs.

Does the APCD Approve the Plan?

Yes No

(See 321.N.2) Is a Carbon Adsorption System Used?

System Exhaust Equal to or Less than 25 ppmv of ROC.

Yes No

(See 321.N.2)

The Ventilation Rate Range is 15 to 20 cubic meters per minute per square meter of solvent/air interface area.

2 (See 321.N.3)

An Application for an Authority to Construct is submitted and the APCD issues an ATC for the Emission Control System. The Operational and Maintenance Plan Required by Section Q Shall be Submitted with the Authority To Construct Application.

(See 321.N.4 and 321.Q)

Complete the Initial Source Test within One Year from the Date of the revised Rule Adoption (or Later Deadline Specified in an ATC).

(See 321.N.5)

Is the Source Using the Emission Control System as an Alternative Compliance Method per Section H.7, I.7, K.6, or M.1?

(See 321.N.6)

The Emissions from the Emission Control System Shall be Equal to or Less than Emissions Otherwise Expected from Compliance with Section H.7, I.7, K.6, or M.1.

Yes No

(See 321.Q)

The Source Implements the Plan upon Receiving Approval of it from the Control Officer.

3

The APCD Lists the Plan Deficiencies. The Source Revises the Plan and Resubmits It.

(See 321.Q) End of Section N and Section Q Requirements for Emission Control System Requirements and Operation and Maintenance Plans.

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent. 2. Unless otherwise required to meet a National Institute for Occupational Safety and Health Standard. 3. The records required by the Operational and Maintenance Plan are to comply with the requirements in Sections R.1.c and R.3.

(See 321.N.1) Submit an Operation and Maintenance Plan per Rule 3231.Q (See 321.Q)
STAFF REPORT - Rule 321 Page L-30

September 20, 2010

Santa Barbara County APCD

Figure 14. Rule 321, Section O, Alternative operating and equipment requirements for an airless solvent cleaning machine or an air-tight solvent cleaning machine.

1

A Source has an Airless or Air-Tight Solvent Cleaning Machine that is Subject to Rule 321. In Lieu of Meeting the Requirements Sections E-L, a Source may use an Airless or Air-Tight Solvent Cleaning Machine, Provided all of the Following Requirements are Met.

(See 321.O)

(See 321.O.1 and 2) The Equipment Is Operated per the Manufacturer's Specifications and it is Operated with in a Sealed Manner During All Cleaning and Drying Cycles. Also, no Liquid Solvent Shall Drain Out via a Pressure Relief Device. A Pressure Gauge Shall be Installed. (See 321.O.3) A List of the Operating Requirements that is Posted (or Kept) Near the Unit to be Used as a Reference to the Operator.

(See 321.O.4)

End of Section O Operating and Equipment Requirements for Airless and Air-Tight Solvent Cleaning Machines.

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent.

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STAFF REPORT - Rule 321 Page L-31

September 20, 2010

Santa Barbara County APCD

Yes

Figure 15. Rule 321, Section P, Test methods.

1

A Source Has a Solvent Cleaning Machine and/or is Performing Solvent Cleaning that is Subject to Rule 321.

(See 321.P)

(See 321.P.1)

The Source shall Comply with the Following Test Methods.

(See 321.P.1) Is a Determination of the ROC Content of a Solvent Needed?

EPA Method 24 Shall be Used. No

Yes (See 321.P.2) (See 321.P.2) Is a Determination of a Solvent’s Initial Boiling Point Needed?

The ASTM D1078-05 Standard Method Shall be Used. No

Yes (See 321.N.1)

No

Is a Determination of an Emissions Control Systems Overall Efficiency Needed?

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent.

1

(See 321.P.3) Is the Emission Control System Reducing Emissions of Reactive Organic Compounds? The Method Described in 40 CFR, Section 52.741(a)(4)(iii) Shall be Used to Determine the Capture System Efficiency.

The Overall Efficiency Equals The Capture System Efficiency Times the Control Device Efficiency.

(See 321.P.4) Yes

The Methods Described in 40 CFR, Appendix M, Methods 204-204F, Shall be Used to Determine the Control Device Efficiency.

(See 321.P.3) Is the Emission Control System Reducing Emissions of Toxic Air Contaminants? The Capture System Efficiency Shall be Determined Using the Method Described in 40 CFR, Section 52.741(a)(4)(iii), Modified in a Manner Approved by the Control Officer to Quantify the Mass of Liquid or Gaseous Reactive Organic Compounds and/ or Toxic Air Contaminants.

(See 321.P.4)

Yes

No

Has the EPA Approved a Test Method(s) for Determining the Emission Control Device Efficiency for a System Handling the Specific Toxic Air Contaminants Being Controlled? A Control Officer Approved Detection Method Applicable for Each Target Toxics Specie Shall be Used.

The EPA Method(s) Shall be Used.

Yes No Several EPA and/or Control Officer Approved Test Methods on the Emission Control Device Efficiency May Need to be Employed to Demonstrate that the Emission Control System Overall Efficiency is at Least 85 Percent by Weight in Reducing Emissions of ROC and TACs. in Addition, Techniques to Convert “Parts Per Million by Volume” Test Method Results to 1) “Parts Per Million by Weight,” and/or 2) “Mass Emission Rates” (E.G., Pounds Per Hour) Shall be Approved by the Control Officer.

No

(See 321.P.4.c) (See 321.P.4.b) (See 321.P.4.a)

(See 321.P.3 and 4)

(See 321.P.3 and 4)

(See 321.N.1)

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STAFF REPORT - Rule 321 Page L-32

September 20, 2010

Santa Barbara County APCD

Is a Determination of a Volumetric Flowrate Needed?

Is a Determination of the Average Workroom Draft Rate Needed?

Are the Identities of Components in a Solvent Needed?

Does an Emission Control System Exhaust ROC Concentration Need to be Determined?

Figure 15. (cont.)

1

No Yes (See 321.P.1) EPA Method 2, 2A, 2C, 2D, 2F, or 2G Shall be Used.

(See 321.P.5)

No Yes (See 321.P.6) A Thermistor Anemometer with the Proper Accuracy Range Shall be Used. (See 321.P.6)

No Yes (See 321.P.7) Use Manufacturer’s Formulation Data or ASTM E168-06, ASTM E169-04, or ASTM E260-96 (2006).

(See 321.P.7)

No Yes (See 321.P.8) Use EPA Method 18 with Gas Chromatography- Flame Ionization Detection Speciation analysis for C1, C2, C3, C4, C5, C6+ Species.

(See 321.P.8)

End of Section P Test Method Requirements.

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent.

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STAFF REPORT - Rule 321 Page L-33

September 20, 2010

Santa Barbara County APCD

Figure 16. Rule 321, Section R, Recordkeeping requirements.

1

(See 321.R.1)

Yes

(See 321.R.1.c)

No (See 321.R.1.a)

A Source has an Solvent Cleaning Machine and/or is Performing Solvent Cleaning that is Subject to Rule 321. The Source shall Comply with the Following. Keep Information on all Solvents, Including Type of Solvent, MSDSs, and Purchase Records. (See 321.R.1.b) Keep Monthly Solvent Usage and Disposal Records. Also, Keep the Pertinent Solvent Cleaning and/or Solvent Cleaning Machine Records.

Is the Source Using an Emission Control System Pursuant to Section N as a Means of Complying with the Rule? (See 321.R.1.c)

Maintain Daily Records per the Operation and Maintenance Plan Required by Section Q.

Does a Facility Claim the Section B.9 Exemption?

No

Maintain Daily Records of Aerosol Product Usage that Demonstrates Such Usage is Equal to or Less than 160 Fluid Ounces per Day per Facility.

(See 321.R.2)

(See 321.B.9 & 321.R.2) Yes

End of Recordkeeping Requirements.

1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent. 2. Solvents with an ROC content of 50 grams per liter or less do not count toward the 55 gallons per year aggregate limit.

No Does the Source Claim the Section B.15 Exemption? Maintain 1) Monthly Records and 2) Calendar Year Total Records of Source-Wide Solvent Usage in Solvent Cleaning Activities that Demonstrate Such Usage is Equal to or Less than 55 Gallons per Year for the Entire Stationary Source.

2

(See 321.R.2)

(See 321.B.9 & 321.R.2) Yes

Maintain the Records on Site for at Least 3 Years. Thereafter, Maintain the Records Readily Available for Expeditious Inspection and Review for an Additional 2 Years. (See 321.R.3)

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STAFF REPORT - Rule 321 Page L-34

September 20, 2010

Santa Barbara County APCD

Figure 17. Rule 321, Section S, Reporting requirements, and Section T, Compliance schedule.

1 1. These flowcharts are presented on an informational basis to assist the reader in understanding the requirements. If there is any conflict between the flowcharts and the rule, rule text takes precedent. 2. The provisions in Sections H.7, I.7, J.8, J.11, K.6, L.9, and L.11 have an effective date of one year from the date of revised rule adoption. 3. Some solvent cleaning machines have been exempt from the September 18, 1997 amended Rule 321, but will lose the exemption by the adoption of the proposed amended Rules 102 (Definitions), 202 (Exemptions to Rule 201), and/or Rule 321 (Solvent Cleaning and Solvent Cleaning Machines).

No Is the Solvent Cleaning Machine or Solvent Cleaning Subject to an APCD Authority to Construct or Permit to Operate? An Annual Report Shall be Submitted to the Air Pollution Control District. The Annual Report Shall Contain the Records Required by Section R.1.b.1), Annual Totals, and Permittee Data. The Report Shall be due March 1 for the Previous Calendar Year.

(See 321.S) A Source has an Solvent Cleaning Machine and/or is Performing Solvent Cleaning that is Subject to Rule 321.

Yes (See 321.S)

(See 321.T) Any Source that Uses a SCM or Performs any Solvent Cleaning Subject to Rule 321 Shall Meet the Following Compliance Schedule.

No Annual Report Required.

Any New SCM Shall Comply the First time it is Operated and any new Solvent Cleaning Shall Comply the First time it is Performed.

2

End of Compliance Schedule Provisions for New SCMs or New Solvent Cleaning

Is An Existing Solvent Cleaning Machine Becoming Subject to Rule 321 for the 1st Time due to a Rule Change?3

(See 321.T.2)

(See 321.T.1)

Yes

Does the Source Have any Existing Solvent Cleaning Operations or Existing Solvent Cleaning Machines?

No Yes (See 321.T.2 & 3)

By [30 days from the date of revised rule adoption], be in full compliance with the applicable operating requirements of Sections D, E, and F. No

(See 321.T.2.b.1)

Commencing the Date of the Revised Rule Adoption], the Owner/ Operator shall Ensure that the Equipment Complies with the Applicable Provisions of Rule 321.

2

By [180 days from the date of revised rule adoption], be in full compliance with the applicable recordkeeping and reporting provisions of Sections R and S. By [365 days from the date of revised rule adoption], be in full compliance with the applicable equipment requirements of Sections G, H, I, J, K, L, and N.

Is the Source Installing a Lip Exhaust After the Rule Amendment Date?

(See 321.T.2.a) (See 321.T.2.b.2)

(See 321.T.2.b.3)

(See 321.T.2.b.4) No

The Lip Exhaust is to be Vented to an Emission Control System that Meets the Requirements of Section N at the Time of Installation.

Yes Yes (See 321.T.2.b.4) Does the Source Have an Existing Solvent Cleaning Operation? By [30 days from the date of revised rule adoption], be in full compliance with the applicable operating requirements of Section D. [180 days from the date of revised rule adoption], be in full compliance with the applicable recordkeeping and reporting provisions of Sections R and S.

By [365 days from the date of revised rule adoption], be in full compliance with the solvent cleaning requirements of Rule Section M.

Yes

(See 321.T.3.b)

(See 321.T.3.c)

(See 321.T.3.a) No

End of Compliance Schedule Provisions for Existing SCMs and Existing Solvent Cleaning Operations

(See 321.T.3)

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STAFF REPORT - Rule 321 Page L-35

September 20, 2010

Santa Barbara County APCD

Figure 18. Overview of the solvent cleaning machine categories.

1 1. This flowchart is presented on an informational basis to assist the reader in understanding the Rule 321 solvent cleaning machine categories. If there is any conflict between the flowchart and the rule, rule text takes precedent.

(“Solvent Cleaning Machine” is Defined in the Proposed Amended Rule 102. Definitions for the Different Types of Solvent Cleaning Machines are Found in Rule 321.C.) Solvent Cleaning Machine

In-Line or Continuous (Conveyorized) Cleaning Machine

Ba Gas-Path Solvent Cleaner tch Examples: 1. Immersion Cold Cleaner 2. Remote Reservoir Cold Cleaner 3. Solvent Wash Stations 4. Enclosed Gun Washer 5. Brake Cleaner 6. Parts Washer 7. Airless Solvent Cleaner 8. Airtight Solvent Cleaner 9. Open-top Vapor Cleaner 10. Gyro (Ferris Wheel) Vapor Cleaner

2 11. Cross-Rod Vapor Cleaner

2 _____________ 2

Provided the machine is manually or semi-continuously loaded.

Example: Equipment that Applies Solvent to the Interior of Gas Turbine or Jet Engines. Examples:

3 1. Vibra Vapor Cleaner 2. Monorail Vapor Cleaner 3. Mesh Vapor Cleaner 4. Web Vapor Cleaner 5. Strip Vapor Cleaner 6. Coil Vapor Cleaner 7. Film Cleaner 8. Coil Cleaner 9. Wire Cleaner 10. Metal Strips Cleaner _____________ 3

These machines use an automated parts handling system to provide a continuous supply of parts to be cleaned.

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STAFF REPORT - Rule 321 Page L-36

September 20, 2010

Santa Barbara County APCD

Figure 19, Overview of the Rule 321 equipment and operating requirement sections for the different types of solvent cleaning machines.

1 1. This flowchart is presented on an informational basis to assist the reader in understanding the Rule 321 equipment and operating requirements. If there is any conflict between the flowchart and the rule, rule text takes precedent. 2. A remote reservoir cold cleaning machine that uses an enclosed container that is accessible for dipping or soaking parts is also considered to be a batch cleaning machine and shall comply with the Section I requirements.

Solvent Cleaning Machine

Cold In-Line or Continuous (Conveyorized) Cleaning Machine Vapor Batch

Cold Vapor

Additional Equip. Requirements for:

1. Remote Reservoir SCMs: §321.H.

2 2. Other SCMs: §321.I. See §321.E for Additional Operating Requirements. See §321.J for Additional Equipment Requirements. See §321.K for Additional Equipment Requirements.

See §321.F for Additional Operating Requirements.

See §321.E for Additional Operating Requirements. See §321.L for Additional Equipment Requirements.

(For General Operating Requirements See Rule 321.D and for General Equipment Requirements See Rule 321.G.) Gas-Path Solvent Cleaner

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STAFF REPORT - Rule 321 Page M-1

September 20, 2010

Santa Barbara County APCD

Appendix M

Santa Barbara County 

List of Toxic Air Contaminantsa

COMPOUND

LISTED IN THE 

AB 2588 

EMISSION 

INVENTORY 

CRITERIA & 

GUIDELINES 

DOCUMENT, 

APPENDIX A-I

b

LISTED 

IN 17 

CCR 

SECTION 

93000c

LISTED 

IN 17 

CCR 

SECTION 

93001c,d

Acetaldehyde X X

Acetamide X X

Acetonitrile X X

Acetophenone; Methyl phenyl ketone X X

2-Acetylaminofluorene [PAH-Derivative, POM]; N-fluoren2-yl acetamideX X

Acrolein X X

Acrylamide X X

Acrylic acid X X

Acrylonitrile; Vinyl cyanide X X

Allyl chloride; 3-Chloropropene X X

Aluminum X

Aluminum oxide (fibrous forms) X

2-Aminoanthraquinone [PAH-Derivative, POM] X

4-Aminobiphenyl [POM] X X

Amitrole X

Ammonia X

Ammonium nitrate X

Ammonium sulfate X

Aniline X X

o-Anisidine X X

Anthracene [PAH, POM] X

Antimony X

Antimony compounds X

Antimony compounds including but not limited to:

 Antimony trioxide

X

Arsenic X

Arsenic compounds X

Arsenic compounds (inorganic) including but not limited to:

 Arsine

X

 

a

This table includes pollutants determined by the State Board to be a toxic air contaminant per Health and Safety 

Code sections 39655 and 39657. Any pollutants added to 1) the California Code of Regulations, Title 17, Sections 

93000 and 93001, or 2) the Consolidated Table of OEHHA/ARB Approved Risk Assessment Health Values are also 

considered to be a toxic air contaminant by the Santa Barbara County Air Pollution Control District.

b The AB 2588 Air Toxics "Hot Spots" Emission Inventory Criteria and Guidelines Regulation (Guidelines) 

provides direction and criteria to facilities on how to compile and submit air toxics emission data required by the 

"Hot Spots" Program. Appendix A-1 lists substances that must have the amount reported.

c

"CCR" stands for California Code of Regulations. Sections 91300 and 91301 are found in Title 17, Division 3, 

Chapter 1, Subchapter 7.

d Also identified as an EPA Hazardous Air Pollutant, promulgated under the provisions of the Clean Air Act Section 

112(b).
STAFF REPORT - Rule 321 Page M-2

September 20, 2010

Santa Barbara County APCD

COMPOUND IN AB 2588 IN §93000 IN §93001

Arsenic compounds (other than inorganic) X

Arsenic, Inorganic, see Inorganic Arsenic X

Arsine X

Asbestos X

Asbestos [asbestiform varieties of serpentine (chrysotile), 

riebeckite (crocidolite), cummingtonite-grunerite (amosite), 

tremolite, actinolite, and anthophyllite]

X

Asbestos, see Mineral fibers (other than man-made) X

Barium X

Barium chromate X

Barium compounds X

Benz[a]anthracene [PAH, POM] X

Benzene X X X

Benzidine (and its salts) [POM] X

Benzidine; 4-4‟-diaminobiphenyl X

Benzidine-based dyes [POM] including but not limited to: 

Direct Black 38 [PAH-Derivative, POM] Direct Blue 6 

[PAH-Derivative, POM] Direct Brown 95 (technical 

grade) [POM] 

X

Benzo[a]pyrene [PAH, POM] X

Benzo[b]fluoranthene [PAH, POM], see PAH X

Benzofuran X

Benzoic trichloride; Benzotrichloride X

Benzo[j]fluoranthene [PAH, POM] X

Benzo[k]fluoranthene [PAH, POM] X

Benzotrichloride X

Benzoyl chloride X

Benzoyl peroxide; dibenzoyl peroxide X

Benzyl chloride, alpha-chlorotoluene X X

Beryllium, and beryllium compounds X

Beryllium compounds X

Biphenyl [POM]; diphenyl; phenylbenzene X X

Bis(2-chloroethyl) ether; DCEE, see Dichloroethyl ether X

Bis(chloromethyl) ether, see bis-Chloromethyl ether X X

Bis(2-ethylhexyl)adipate X

Bis(2-ethylhexyl)phthalate (DEHP) X

Bromine X

Bromine compounds (inorganic) including but not limited 

to:

 Bromine pentafluoride

 Hydrogen bromide

 Potassium bromate 

X

Bromine pentafluoride X

Bromoform; tribromomethane X X

1,3-Butadiene X X X

2-Butanone, see Methyl ethyl ketone (MEK) X X

tert-Butyl acetate; tertiary-butyl acetate; t-Butyl acetate; 

tBAc 

X

Butyl acrylate X

n-Butyl alcohol; 1-butanol X

sec-Butyl alcohol X

tert-Butyl alcohol X

Butyl benzyl phthalate X

Cadmium compounds X X

Cadmium (metallic cadmium and cadmium compounds) X
STAFF REPORT - Rule 321 Page M-3

September 20, 2010

Santa Barbara County APCD

COMPOUND IN AB 2588 IN §93000 IN §93001

Calcium cyanamide X X

Caprolactam X X

Captafol X

Captan X X

Carbaryl [PAH-Derivative, POM]; 1-naphthyl NmethylcarbamateX X

Carbon black extracts X

Carbon disulfide X X

Carbon tetrachloride; Tetrachloromethane X X X

Carbonyl sulfide X X

Carrageenan (degraded) X

Catechol; pyrocatecho X X

Chloramben X X

Chlordane; 1,2,44,5,6,7,8-octochloro-3a,4,7,7a-tetrahydro4,7-methanoindaneX X

Chlorinated dibenzodioxins; dioxins; see Polychlorinated 

dibenzo-p-dioxins) [POM]

X

Chlorinated paraffins (average chain length, C12; 

approximately 60% chlorine by weight)

X

Chlorine X X

Chlorine dioxide X

Chloroacetic acid X X

2-Chloroacetophenone X X

p-Chloroaniline X

Chlorobenzene; monochlorobenzene X

Chlorobenzenes including but not limited to: 

 Chlorobenzene

 Dichlorobenzenes (mixed isomers) including:

 1,2-Dichlorobenzene

 1,3-Dichlorobenzene

 p-Dichlorobenzene; 1,4-Dichlorobenzene; 

 1,4-Dichlorobenzene (p)

 1,2,4-Trichlorobenzene

X X

Chlorobenzilate [POM]; Ethyl-4,4'-dichlorobenzilate X X

Chlorodifluoromethane; Fluorocarbon 22 X

Chloroform; trichloromethane X X X

bis-Chloromethyl ether X X

Chloromethyl methyl ether X

Chloromethyl methyl ether (technical grade) X

Chlorophenols including but not limited to:

 2-Chlorophenol

 2,4-Dichlorophenol

 Pentachlorophenol

 Tetrachlorophenols including but not limited to:

 2,3,4,6-Tetrachlorophenol

 2,4,5-Trichlorophenol

 2,4,6-Trichlorophenol 

X

4-Chloro-o-phenylenediamine X

Chloropicrin; trichloronitromethane X

Chloroprene; 2-chloro-1,3-butadiene X X

p-Chloro-o-toluidine X

Chromium X

Chromium compounds X

Chromium compounds (other than hexavalent) X

Chromium, Hexavalent, see Hexavalent chromium (CR VI)) X
STAFF REPORT - Rule 321 Page M-4

September 20, 2010

Santa Barbara County APCD

COMPOUND IN AB 2588 IN §93000 IN §93001

Chromium, hexavalent (and compounds) including but not 

limited to:

 Barium

 Calcium chromate

 Chromium trioxide

 Lead chromate

 Sodium dichromate

 Strontium chromate 

X

Chrysene [PAH, POM] X

Cobalt compounds X

Cobalt X

Cobalt compounds X

Coke oven emissions X X

Copper and copper compounds X

Creosotes X

p-Cresidine X

m-Cresol X X

o-Cresol X X

p-Cresol X X

Cresols (mixtures of); Cresylic acid; including:

 m-Cresol

 o-Cresol 

 p-Cresol 

X

Cresols/Cresylic acid (isomers and mixture) X

Crotonaldehyde X

Cumene; isopropylbenzene X X

Cumene hydroperoxide X

Cupferron X

Cyanide compounds X

Cyanide compounds including but not limited to:

 Hydrocyanic acid

X

Cyclohexane X

Cyclohexanol X

Cycloheximide X

2,4-D, salts and esters X

DDE, see Dichlorodiphenyldichloroethylene X

Decabromodiphenyl oxide [POM], see Polybrominated 

diphenyl ethers

X

Dialkylnitrosamines including but not limited to:

 N-Nitrosodi-n-butylamine 

 N-Nitrosodiethanolamine 

 N-Nitrosodiethylamine 

 N-Nitrosodimethylamine

 N-Nitrosodi-n-propylamine

 N-Nitrosomethylethylamine 

X

2,4-Diaminoanisole X

2,4-Diaminotoluene; 2,4-Toluenediamine; 2,4-Toluene 

diamine

X X

Diaminotoluenes (mixed isomers) including but not limited 

to: 2,4-Diaminotoluene; 2,4-Toluenediamine

X X

Diazomethane X X

Dibenz[a,h]acridine [POM] X

Dibenz[a,j]acridine [POM] X

Dibenz[a,h]anthracene [PAH, POM], see PAH X

7H-Dibenzo[c,g]carbazole [PAH, POM], see PAH X
STAFF REPORT - Rule 321 Page M-5

September 20, 2010

Santa Barbara County APCD

COMPOUND IN AB 2588 IN §93000 IN §93001

Dibenzo[a,e]pyrene [PAH, POM], see PAH X

Dibenzo[a,h]pyrene [PAH, POM], see PAH X

Dibenzo[a,i]pyrene [PAH, POM], see PAH X

Dibenzo[a,l]pyrene [PAH, POM], see PAH X

Dibenzo-p-dioxins and Dibenzofurans chlorinated in the 

2,3,7 and 8 positions and containing 4,5,6 or 7 chlorine 

atoms

X

Dibenzofurans (chlorinated), see Polychlorinated 

dibenzofurans [POM]

X

Dibenzofuran [POM] X

Dibenzofurans X

1,2-Dibromo-3-chloropropane; DBCP X X

2,3-Dibromo-1-propanol X

Dibutyl phthalate; Dibutylphthalate X X

p-Dichlorobenzene; 1,4-dichlorobenzene; 1,4-

Dichlorobenzene (P)

X

p-Dichlorobenzene; 1,4-Dichlorobenzene; see 

Chlorobenzenes

X

1,4-Dichlorobenzene; p-Dichlorobenzene X

3,3'-Dichlorobenzidine; 4,4'-diamino-3,3'-dichlorobiphenyl X X

Dichlorodiphenyldichloroethylene [POM], DDE X X

1,1-Dichloroethane; Ethylidene dichloride X

Dichloroethyl ether; bis(2-chloroethyl) ether; DCEE X X

Dichlorophenoxyacetic acid, salts and esters X

1,2-Dichloropropane, see Propylene dichloride X

1,3-Dichloropropene X X

Dichlorvos; DDVP; 2,2-dichlorovinyl dimethyl phospate X X

Dicofol [POM] X

Diesel engine exhaust X

Diesel engine exhaust, particulate matter (see particulate 

emissions from diesel-fueled engines too)

X X

Diesel engine exhaust, total organic gas X

Diesel fuel (marine) X

Diethanolamine X X

Di(2-ethylhexyl) phthalate; DEHP, see Di-sec-octyl 

phthalate

X

Diethylhexylphthalate; DEHP, see Di-sec-octyl phthalate X

Diethyl sulfate X X

3,3'-Dimethoxybenzidine [POM] X X

4-Dimethylaminoazobenzene [POM]; Dimethyl 

aminoazobenzene 

X X

N,N-Dimethylaniline; dimethylaniline X X

7,12-Dimethylbenz[a]anthracene [PAH-Derivative, [POM] X

3,3'-Dimethylbenzidine [POM]; o-Tolidine; 3,3'-Dimethyl 

benzidine

X X

Dimethyl carbamoyl chloride X X

Dimethyl formamide X

Dimethylformamide; DMF X

1,1-Dimethylhydrazine X X

Dimethyl phthalate X X

Dimethyl sulfate; methyl sulfate X X

3,3'-Dimethyoxybenzidine X

4,6-Dinitro-o-cresol (and salts) X X

2,4-Dinitrophenol X X

1,6-Dinitropyrene [PAH-Derivative, POM] X
STAFF REPORT - Rule 321 Page M-6

September 20, 2010

Santa Barbara County APCD

COMPOUND IN AB 2588 IN §93000 IN §93001

1,8-Dinitropyrene [PAH-Derivative, POM] X

2,4-Dinitrotoluene X X

Dinitrotoluenes (mixed isomers) including but not limited 

to: 

 2,4-Dinitrotoluene 

 2,6-Dinitrotoluene 

X

1,4 Dioxane; 1,4-Diethyleneoxide X X

Dioxins (Chlorinated dibenzodioxins) (see Polychlorinated 

dibenzo-p-dioxins) [POM]

X

Diphenylhydantoin [POM] X

1,2-Diphenylhydrazine [POM]; Hydrazobenzene X X

Dipropylene glycol X

Dipropylene glycol methyl ether X

Di-sec-octyl phthalate; bis(2-ethylhexyl) phthalate; 

diethylhexylphthalate

X

Environmental Tobacco Smoke X X

Epichlorohydrin, 1-chloro-2,3 epoxypropane X X

Epoxy resins X

1,2-Epoxybutane X X

Ethyl acrylate X X

Ethylbenzene X X

Ethyl carbamate; Urethane X

Ethyl chloride; chloroethane X X

Ethyl-4,4'-dichlorobenzilate (see Chlorobenzilate) X

Ethylene X

Ethylene dibromide; 1,2 dibromoehane X X X

Ethylene dichloride; 1,2,-dichlroethane X X X

Ethylene glycol X X

Ethylene glycol diethyl ether, 1,2 dicthoxyethane X

Ethylene glycol dimethyl ether; 1,2-dimethoxyethane, G‟-

yme 

X

Ethylene glycol monobutyl ether X

Ethylene glycol monoethyl ether, see 2-Ethoxyethanol X

Ethylene glycol monomethyl ether, see 2-Methoxyethanol X

Ethylene glycol monoethyl ether acetate X

Ethylene glycol monomethyl ether acetate X

Ethylene glycol monopropyl ether X

Ethyleneimine; Aziridine X X

Ethylene oxide X X X

Ethylene thiourea X X

Ethylidene dichloride; 1,1-Dichloroethane) X

Fine mineral fibers X

Fluorides and compounds including but not limited to:

 Hydrogen fluoride

X

Fluorocarbons (brominated) X

Fluorocarbons (chlorinated) including but not limited to:

 Chlorinated fluorocarbon; CFC-113;

 1,1,2-Trichloro-1,2,2-trifluoroethane

 Chlorodifluoromethane; Fluorocarbon 22

 Dichlorofluoromethane; Fluorocarbon 12 

 Dichlorofluoromethane; Fluorocarbon 21

 Trichlorofluoromethane; Fluorocarbon 11 

X

Formaldehyde X X X

Furan X
STAFF REPORT - Rule 321 Page M-7

September 20, 2010

Santa Barbara County APCD

COMPOUND IN AB 2588 IN §93000 IN §93001

Gasoline engine exhaust including but not limited to:

 Gasoline engine exhaust (condensates &

 extracts)

 Gasoline engine exhaust, particulate matter

 Gasoline engine exhaust, total organic gas 

X

Gasoline Vapors X

Glutaraldehyde X

Glycol ethers X

Glycol ethers and their acetates including but not limited to:

 Diethylene glycol 

 Diethylene glycol dimethyl ether 

 Diethylene glycol monobutyl ether 

 Diethylene glycol monoethyl ether 

 Diethylene glycol monomethyl ether 

 Dipropylene glycol 

 Dipropylene glycol monomethyl ether 

 Ethylene glycol diethyl ether

 Ethylene glycol dimethyl ether 

 Ethylene glycol monobutyl ether 

 Ethylene glycol monoethyl ether 

 Ethylene glycol monoethyl ether acetate; PGMEA 

 Ethylene glycol monomethyl ether 

 Ethylene glycol monomethyl ether acetate 

 Ethylene glycol monopropyl ether 

 Propylene glycol monomethyl ether 

 Propylene glycol monomethyl ether acetate 

 Triethylene glycol dimethyl ether 

X

Heptachlor; 1,4,5,6,7,8,8-hepta-chloro-3a,4,7,7a tetrahydro 

4,7 methanoindene

X X

1,2,3,4,6,7,8-Heptachlorodibenzofuran see Polychlorinated 

dibenzofurans

X

1,2,3,4,7,8,9-Heptachlorodibenzofuran see Polychlorinated 

dibenzofurans

X

1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin see 

Polychlorinated dibenzo-p-dioxins

X

Hexachlorobenzene X X

Hexachlorobutadiene X X

Hexachlorocyclohexanes (mixed or technical grade) 

including but not limited to:

 alpha-Hexachlorocyclohexane

 beta-Hexachlorocyclohexane

 Lindane; gamma-Hexachlorocyclohexane

X

Hexachlorocyclopentadiene X X

1,2,3,4,7,8-Hexachlorodibenzofuran see Polychlorinated 

dibenzofurans

X

1,2,3,6,7,8-Hexachlorodibenzofuran see Polychlorinated 

dibenzofurans

X

1,2,3,7,8,9-Hexachlorodibenzofuran see Polychlorinated 

dibenzofurans

X

2,3,4,6,7,8-Hexachlorodibenzofuran see Polychlorinated 

dibenzofurans

X

1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin see Polychlorinated 

dibenzo-p-dioxins

X

1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin see Polychlorinated 

dibenzo-p-dioxins

X
STAFF REPORT - Rule 321 Page M-8

September 20, 2010

Santa Barbara County APCD

COMPOUND IN AB 2588 IN §93000 IN §93001

1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin see Polychlorinated 

dibenzo-p-dioxins

X

Hexachloroethane; perchloroethane X X

Hexamethylene diisocyanate; HDI; Hexamethylene-1,6-

diisocyanate

X

Hexamethylphosphoramide X X

Hexane X X

Hexavalent chromium (CR (VI)) X X

Hydrazine X X

Hydrobromic acid, see Hydrogen bromide X

Hydrochloric acid, see Hydrogen chloride X

Hydrocyanic acid (see Cyanide compounds) X

Hydrofluoric acid, see Hydrogen Fluoride X

Hydrogen bromide X

Hydrogen chloride; Muriatic acid; Hydrochloric acid X X

Hydrogen cyanide X

Hydrogen fluoride; Hydrofluoric acid X

Hydrogen sulfide X

Hydroquinone; 1,4-benezendiol X X

Indeno[1,2,3-cd]pyrene [PAH, POM] X

Inorganic Arsenic X

Inorganic lead, see Lead compounds (inorganic) X

Inorganic lead X

Iron pentacarbonyl X

Isocyanates including but not limited to: Hexamethylene1,6-diisocyanate Methylene diphenyl diisocyanate [POM]; 

MDI Methyl isocyanate Toluene-2,4-diisocyanate (see 

Toluene diisocyanates) Toluene-2,6-diisocyanate (see 

Toluene diisocyanates)

X

Isophorone X

Isophorone; 3,5,5-trimethyl-2-cyclohexen-1-one X

Isoprene, except from vegetative emission sources X

Isopropanol, see Isopropyl alcohol X

Isopropyl alcohol; isopropanol X

4,4'-Isopropylidenediphenol X

Lead X

Lead compounds (inorganic) including but not limited to:

 Lead acetate

 Lead chromate (see Chromium, hexavalent)

 Lead phosphate 

 Lead subacetate

X

Lead compounds (other than inorganic) X

Lead compounds X

Lindane (mixed or technical grade); gammaHexachlorocyclohexane, see Hexachlorocyclohexanes X

Lindane (all isomers) X

Maleic anhydride; cis-butenedioic anhydride X X

Manganese X

Manganese compounds X X

Mercury X

Mercury compounds X

Mercury compounds including but not limited to:

 Mercuric chloride

 Methyl mercury; Dimethylmercury

X

Methanol, see Methyl alcohol X X
STAFF REPORT - Rule 321 Page M-9

September 20, 2010

Santa Barbara County APCD

COMPOUND IN AB 2588 IN §93000 IN §93001

Methoxychlor [POM] X

Methoxychlor; 1,1,1-trichloro-2-2-bis(pmethoxyphenyl)ethaneX

Methyl alcohol; methanol X X

2-Methylaziridine; 2-Methyl aziridine; 1,2-Propyleneimine X

Methyl bromide; Bromomethane X X

Methyl chloride; Chloromethane X X

Methyl chloroform; 1,1,1 trichloroethane X X

3-Methylcholanthrene [PAH-Derivative, POM] X

5-Methylchrysene [PAH-Derivative, POM] X

4,4'-Methylene bis(2-chloroaniline) [POM]; MOCA X X

Methylene chloride; dichloromethane X X X

4,4'-Methylenedianiline (and its dichloride) [POM] X

4,4‟-Methylenedianiline; MDA; 4,4'-Methylene dianiline X

Methylene diphenyl diisocyanate; MDI X X

Methyl ethyl ketone; MEK; 2-butanone; ethyl methyl ketone X X

Methyl hydrazine X X

Methyl iodide; Iodomethane X X

Methyl isobutyl ketone; Hexone; MIBK X X

Methyl isocyanate X X

2-Methyllactonitrile; Acetone cyanohydrin X

Methyl methacrylate; methyl 2 methyl 2 propenoate X X

2-Methylpyridine X

Methyl tert-butyl ether; MTBE; Methyl t-butyl ether X X

Michler's ketone [POM] X

Mineral fibers (fine, manmade) X

Mineral fibers (fine, manmade) (fine mineral fibers which 

are manmade and are airborne particles of a respirable size 

greater than 5 microns in length, less than or equal to 3.5 

microns in diameter, with a length to diameter ratio of 3:1) 

including but not limited to:

 Ceramic fibers 

 Glasswool fibers 

 Rockwool fibers 

 Slagwool fibers. 

X

Mineral fibers (other than manmade) including but not 

limited to:

 Asbestos 

 Erionite

 Talc containing asbestiform fibers

X

Molybdenum trioxide X

Naphthalene [PAH, POM] X X

Nickel X

Nickel (metallic nickel and inorganic nickel compounds) X

Nickel carbonyl; NI (CO)4 X

Nickel compounds X

Nickel compounds including but not limited to:

 Nickel acetate 

 Nickel carbonate

 Nickel carbonyl

 Nickel hydroxide

 Nickelocene

 Nickel oxide

 Nickel subsulfide 

X

Nickel oxide X
STAFF REPORT - Rule 321 Page M-10

September 20, 2010

Santa Barbara County APCD

COMPOUND IN AB 2588 IN §93000 IN §93001

Nickel refinery dust from the pyrometallurgical process X

Nitric acid X

Nitrilotriacetic acid X

Nitrobenzene X X

4-Nitrobiphenyl [POM] X X

6-Nitrochrysene [PAH-Derivative, POM] X

2-Nitrofluorene [PAH-Derivative, POM] X

Nitrogen mustard N-oxide X

4-Nitrophenol X X

2-Nitropropane X X

1-Nitropyrene [PAH-Derivative, POM] X

N-Nitrosodi-n-butylamine, see Dialkylnitrosamines X

N-Nitrosodi-n-propylamine, see Dialkylnitrosamines X

N-Nitrosodiethylamine X

N-Nitroso-n-methylurea X

N-Nitrosodimethylamine X

N-Nitrosodimethylamine, see Dialkylnitrosamines X

p-Nitrosodiphenylamine [POM] X

N-Nitroso-N-methylurea X

N-Nitrosomorpholine X X

N-Nitrosopiperidine X

N-Nitrosopyrrolidine X

1,2,3,4,6,7,8,9-Octachlorodibenzofuran [POM] see 

Polychlorinated dibenzofurans

X

1,2,3,4,6,7,8,9-Octachlorodibenzo-p-dioxin [POM] see 

Polychlorinated dibenzo-p-dioxins

X

Oleum, see Sulfuric acid and oleum X
STAFF REPORT - Rule 321 Page M-11

September 20, 2010

Santa Barbara County APCD

COMPOUND IN AB 2588 IN §93000 IN §93001

PAHs (Polycyclic aromatic hydrocarbons) [POM] including 

but not limited to:

 PAHs, total, w/o individ. components reported 

 [PAH, POM]

 PAHs, total, with individ. components also 

 reported [PAH, POM]

 Acenaphthene [PAH, POM]

 Acenaphthylene [PAH, POM] 

 Anthracene [PAH, POM]

 Benz[a]anthracene [PAH, POM] 

 Benzo[a]pyrene [PAH, POM] 

 Benzo[b]fluoranthene [PAH, POM] 

 Benzo[e]pyrene [PAH, POM] 

 Benzo[g,h,i]perylene [PAH, POM] 

 Benzo[j]fluoranthene [PAH, POM] 

 Benzo[k]fluoranthene [PAH, POM] 

 Chrysene [PAH, POM] 

 Dibenz[a,h]anthracene [PAH, POM] 

 Dibenzo[a,e]pyrene [PAH, POM] 

 Dibenzo[a,h]pyrene [PAH, POM] 

 Dibenzo[a,i]pyrene [PAH, POM] 

 Dibenzo[a,l]pyrene [PAH, POM] 

 Fluoranthene [PAH, POM] 

 Fluorene [PAH, POM] 

 Indeno[1,2,3-cd]pyrene [PAH, POM] 

 2-Methyl naphthalene [PAH, POM] 

 Naphthalene [PAH, POM] 

 Perylene [PAH, POM] 

 Phenanthrene [PAH, POM] 

 Pyrene [PAH, POM] 

X

PAH-Derivatives (Polycyclic aromatic hydrocarbon 

derivatives) [POM] including but not limited to those 

substances listed in appendix A with the bracketed 

designation [PAH-Derivative, POM])

X

Parathion; o,o-diethyl o-(p-nitrophenyl) phosphorothioate X X

Particulate Emissions from Diesel-Fueled Engines X X

1,2,3,7,8-Pentachlorodibenzofuran see Polychlorinated 

dibenzofurans

X

2,3,4,7,8-Pentachlorodibenzofuran see Polychlorinated 

dibenzofurans

X

1,2,3,7,8-Pentachlorodibenzo-p-dioxin see Polychlorinated 

dibenzo-p-dioxins

X

Pentachloronitrobenzene; Quintobenzene X X

Pentachlorophenol; PCP X

Peracetic acid X

Perchloroethylene; Tetrachloroethylene; Tetrachloroethene X X X

Phenol X X

p-Phenylenediamine X

p-Phenylenediamine X

2-Phenylphenol [POM] X

Phosgene; carbonyl chloride, COCl2 X X

Phosphine; PH3 X

Phosphorus X X
STAFF REPORT - Rule 321 Page M-12

September 20, 2010

Santa Barbara County APCD

COMPOUND IN AB 2588 IN §93000 IN §93001

Phosphorus compounds:

 Phosphine 

 Phosphoric acid 

 Phosphorus oxychloride 

 Phosphorus pentachloride 

 Phosphorus pentoxide 

 Phosphorus trichloride 

 Tributyl phosphate 

 Triethyl phosphine 

 Trimethyl phosphate 

 Triorthocresyl phosphate [POM] 

 Triphenyl phosphate [POM] 

 Triphenyl phosphite [POM] 

X

Phthalic anhydride X X

Polychlorinated biphenyls (Aroclors) X

Polychlorinated biphenyls (PCBs) [POM] including but not 

limited to:

 3,3',4,4'-Tetrachlorobiphenyl (PCB 77)

 3,4,4',5-Tetrachlorobiphenyl (PCB 81)

 2,3,3',4,4'-Pentachlorobiphenyl (PCB 105)

 2,3,4,4',5-Pentachlorobiphenyl (PCB 114)

 2,3',4,4',5-Pentachlorobiphenyl (PCB 118)

 2,3',4,4',5'-Pentachlorobiphenyl (PCB 123)

 3,3',4,4',5-Pentachlorobiphenyl (PCB 126)

 2,3,3',4,4',5-Hexachlorobiphenyl (PCB 156)

 2,3,3',4,4',5'-Hexachlorobiphenyl (PCB 157)

 2,3',4,4',5,5'-Hexachlorobiphenyl (PCB 167)

 3,3',4,4',5,5'-Hexachlorobiphenyl (PCB 169)

 2,3,3',4,4',5,5'-Heptachlorobiphenyl (PCB 189)

X

Polychlorinated dibenzo-p-dioxins; PCDDs or Dioxins 

[POM] including but not limited to:

 Dioxins, total, w/o individ. isomers reported; PCDDs

 [POM]

 Dioxins, total, with individ. isomers also reported; PCDDs

 [POM]

 2,3,7,8-Tetrachlorodibenzo-p-dioxin; TCDD [POM]

 1,2,3,7,8-Pentachlorodibenzo-p-dioxin [POM] 

 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin [POM] 

 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin [POM] 

 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin [POM] 

 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin [POM] 

 1,2,3,4,6,7,8,9-Octachlorodibenzo-p-dioxin [POM]

 Total Tetrachlorodibenzo-p-dioxin [POM]

 Total Pentachlorodibenzo-p-dioxin [POM]

 Total Hexachlorodibenzo-p-dioxin [POM]

 Total Heptachlorodibenzo-p-dioxin [POM]

X
STAFF REPORT - Rule 321 Page M-13

September 20, 2010

Santa Barbara County APCD

COMPOUND IN AB 2588 IN §93000 IN §93001

Polychlorinated dibenzofurans; PCDFs or Dibenzofurans 

[POM] including but not limited to:

 Dibenzofurans (Polychlorinated dibenzofurans); PCDFs

 [POM]

 2,3,7,8-Tetrachlorodibenzofuran [POM]

 1,2,3,7,8-Pentachlorodibenzofuran [POM]

 2,3,4,7,8-Pentachlorodibenzofuran [POM]

 1,2,3,4,7,8-Hexachlorodibenzofuran [POM] 

 1,2,3,6,7,8-Hexachlorodibenzofuran [POM] 

 1,2,3,7,8,9-Hexachlorodibenzofuran [POM] 

 2,3,4,6,7,8-Hexachlorodibenzofuran [POM] 

 1,2,3,4,6,7,8-Heptachlorodibenzofuran [POM] 

 1,2,3,4,7,8,9-Heptachlorodibenzofuran [POM] 

 1,2,3,4,6,7,8,9-Octachlorodibenzofuran [POM] 

 Total Tetrachlorodibenzofuran [POM] 

 Total Pentachlorodibenzofuran [POM] 

 Total Hexachlorodibenzofuran [POM] 

 Total Heptachlorodibenzofuran [POM]

X

Polycyclic Organic Matter X

POM; Polycyclic organic matter, including but not limited 

to those substances listed in Appendix A with the bracketed 

designation of [POM], [PAH, POM], or [PAH-Derivative, 

POM])

X

Potassium bromate X

1,3-Propane sultone X X

beta-Propiolactone X X

Propionaldehyde X X

Propoxur; 2-isopropoxyphenyl N-methyl carbamate; 

Baygon 

X X

Propylene X

Propylene dichloride; 1,2-dichloropropane X X

Propylene oxide; 1,2-epoxy-propane X X

1,2-Propyleneimine; 2-Methyl aziridine; 2-Methylaziridine X X

Pyridine X

Quinoline X X

Quinone X X

Radionuclides (including radon) X

Radionuclides including but not limited to:

 Iodine-131

 Radon and its decay products

X

Reserpine [POM] X

Residual (heavy) fuel oils X

Selenium X

Selenium compounds including but not limited to:

 Hydrogen selenide

 Selenium sulfide

X

Selenium compounds, as Se X

Silica, crystalline X

Silver X

Silver compounds X

Sodium hydroxide, caustic soda X

Styrene X X

Styrene oxide X X

Sulfuric acid and oleum X

Sulfuric acid X

Terephthalic acid X
STAFF REPORT - Rule 321 Page M-14

September 20, 2010

Santa Barbara County APCD

COMPOUND IN AB 2588 IN §93000 IN §93001

2,3,7,8-Tetrachlorodibenzofuran see Polychlorinated 

dibenzofurans

X

2,3,7,8-Tetrachlorodibenzo-p-dioxin see Polychlorinated 

dibenzo-p-dioxins

X X

1,1,2,2-Tetrachloroethane; acetylene tetrachloride X X

Tetrachloroethylene, see Perchloroethylene X X

Thallium X

Thallium compounds X

Thioacetamide X

Thiourea X

Titanium tetrachloride X X

Toluene; toluol X X

Toluene-2,4-diisocyanate; TDI; 2,4-Toluene diisocyanate X X

Toluene-2,6-diisocyanate X

2,4-Toluenediamine; 2,4-Toluene diamine; see 2,4-

Diaminotoluene and Diaminotoluene

X X

2,4-Toluenediamine, see Diaminotoluene X

Toluene diisocyanates including but not limited to:

 Toluene-2,4-diisocyanate

 Toluene-2,6-diisocyanate

X

o-Toluidine; o-methylaniline X X

Toxaphene; Polychlorinated camphenes X

Toxaphene; Chlorinated camphene X

Tributyl phosphate X

1,2,4-Trichlorobenzene X

1,1,1-Trichloroethane, see Methyl chloroform X X

1,1,2-Trichloroethane; vinyl trichloride X X

Trichloroethylene; trichloroethene X X X

Trichlorofluoromethane; Fluorocarbon 11 X

2,4,5-Trichlorophenol X X

2,4,6-Trichlorophenol (see Chlorophenols) X X

1,2,3-Trichloropropane X

Triethylamine X X

Triethylene glycol dimethyl ether; Triglyme X

Trifluralin X X

1,2,4-Trimethylbenzene X

Trimethylbenzenes including but not limited to:

 1,2,4-Trimethylbenzene

X

2,2,4-Trimethylpentane X X

Triorthocresyl phosphate [POM] X

Triphenyl phosphate [POM], TPP X

Urethane; Ethyl carbamate X

Vanadium (fume or dust) X

Vanadium Pentoxide X

Vinyl acetate X X

Vinyl bromide; bromoethylene X X

Vinyl chloride; Chloroethene X X X

4-Vinylcyclohexene X

Vinyl fluoride X

Vinylidene chloride; 1,1-dichloroethylene X X

Wood preservatives (containing arsenic and chromate) X

Xylenes (isomers and mixture) X
STAFF REPORT - Rule 321 Page M-15

September 20, 2010

Santa Barbara County APCD

COMPOUND IN AB 2588 IN §93000 IN §93001

Xylenes (mixed xylenes) including:

 m-Xylene

 o-Xylene

 p-Xylene

X

m-Xylenes X

o-Xylenes X

p-Xylenes X

Zinc X

Zinc compounds including but not limited to:

 Zinc oxide

X

Click here to return to the list of Appendices in the Staff Report.
THIS PAGE INTENTIONALLY LEFT BLANK
STAFF REPORT - Rule 321 Page N-1

September 20, 2010

Santa Barbara County APCD

Appendix N

Santa Barbara County 

Solvent Information Tablea

ITEM

CHEMICAL OR PRODUCT

(vapor pressure for select 

chemicals and products)

MOLECULAR 

FORMULA OR 

CHEMICAL FAMILY

ROC

ROC 

Content,

grams per 

liter 

(lbs/gal)

SUBJECT TO 

40CFR, PART 63, 

SUBPART T

CAS 

No.

ABBREVIATED 

OR POLLUTANT 

CODE

TACb IBPc

(°F)

HIGH OR 

LOW 

VOLATILITY 

SOLVENTd

1 acetic acid (11.3 mm of Hg @ 

20o C)

C2H4O2 Y 1,048 

(8.75)

N 64-19-7 N 244 H

2 acetone C3H6O N 0 (0) N 67-64-1 N 132 H

3 acetonitrile C2H3N Y 785 (6.56) N 75-05-8 MeCN Y 179 H

4 AsahiKlin AK- 225R C3HCl2F5 & C3HCl2F5

[HCFC-225ca] & 

HCFC-225cb]

N

e

0 (0) N 422-56-0 

39.6-49.5% 

& 507-55-1 

49.5-59.4%

AK-225 N 129 H

 

a

The Santa Barbara County Air Pollution Control District (District) solvent information table is provided for informational purposes only and in no way endorses 

any of the products. Data shown in the table may have changed due to product reformulation. Interested parties should check with the product manufacturers 

and/or suppliers for the most current data. The South Coast Air Quality Management District (SCAQMD) maintains a list of certified Clean Air Solvent (CAS) 

Products and Companies (http://www.aqmd.gov/rules/cas/prolist.html). Other companies may also market zero- or low-ROC solvents that may not be listed on 

the SCAQMD website. 

b A “Y” (yes) indication means the chemical or product is a toxic air contaminant (TAC), as determined by the State Board per Health and Safety Code sections 

39655 and 39657. Any pollutants added to 1) the California Code of Regulations, Title 17, Sections 93000 and 93001, or 2) the Consolidated Table of 

OEHHA/ARB Approved Risk Assessment Health Values are also considered to be a toxic air contaminant by the District.

c

IBP stands for “initial boiling point.”

d

For solvent cleaning machine requirements, a “high volatility solvent” is any solvent with an IBP temperature:

1. ≤ 248 oF or 

2. > 248 oF, but the in-use temperature is not ≤ 212 oF below the IBP temperature. 

Likewise, a “low volatility solvent” is any solvent with an IBP temperature > 248 oF and that has an in-use temperature that is ≤ 212 oF below the IBP

temperature. 

e This product is made up of materials listed in the proposed amended Rule (PAR) 102 definition of reactive organic compound as exempt compounds (nonROC). Thus for the purpose of Rule 321, it will be treated as an exempt solvent (i.e., containing no ROCs). Per PAR 202.D.10.l, use of more than 1 gallon per 

year per stationary source requires an Authority to Construct and Permit to Operate. Some Asahi Glass Company AsahiKlin AK-225 solvents contain ROCs 

(e.g., AsahiKlin AK-225AES, AsahiKlin AK-225ATE).
STAFF REPORT - Rule 321 Page N-2

September 20, 2010

Santa Barbara County APCD

ITEM

CHEMICAL OR PRODUCT

(vapor pressure for select 

chemicals and products)

MOLECULAR 

FORMULA OR 

CHEMICAL FAMILY

ROC

ROC 

Content,

grams per 

liter 

(lbs/gal)SUBJECT TO 

40CFR, PART 63, 

SUBPART T

CAS 

No.

ABBREVIATED 

OR POLLUTANT 

CODE

TACb IBPc

(°F)

HIGH OR 

LOW 

VOLATILITY 

SOLVENTd

5 benzene C6H6 Y 878 (7.33) N 71-43-2 Y 176 H

6 benzonitrile C6H5CN Y 999 (8.34) N 100-47-0 N 370 L (if not heated)

7 2-butoxyethanol C6H14O2 Y 899 (7.51) N 111-76-2 BuOX, 

BG

N 340 L (if not heated)

8 n-butyl acetate, butyl 

ethanoate

C6H12O2 Y 879 (7.34) N 123-86-4 N 259 H

9 tert-butyl acetate (40 mm of 

Hg @ 25° C)

C6H12O2 Y & N

f

0 (0) N 540-88-5 tBAc Y 208 H

10 n-butyl alcohol, 1-butanol, nbutanolC4H10O Y 809 (6.76) N 71-36-3 Y 244 H

11 tert-butyl alcohol C4H10O Y 785 (6.56) N 75-65-0 Y 180 H

12 carbon tetrachloride CCl4 Y 1,583 

(13.21)

Y 56-23-5 CT Y 170 H

13 chlorobenzene C6H5Cl Y 1,109 

(9.26)

N 108-90-7 Y 268 H

14 1-chlorobutane C4H9Cl Y 879 (7.34) N 109-69-3 N 174 H

15 chloroform, trichloromethane CHCl3 Y 1,479 

(12.34)

Y 67-66-3 Y 142 H

16 cyclohexane C6H12 Y 778 (6.50) N 110-82-7 Y 177 H

17 cyclohexanone C6H10O Y 947 (7.90) N 108-94-1 N 312 H

18 decamethylcyclopentasiloxane C10H30O5Si5 N 0 (0) N 541-02-6 DMCPS, 

D-5

N 410 L (if not heated)

19 1,2-dichlorobenzene, orthodichlorobenzeneC6H4Cl2 Y 1,299 

(10.84)

N 95-50-1 Y 177 H

20 1,1-dichloroethylene, 

vinylidene chloride

C2H2Cl2 Y 1,217 

(10.16)

N 75-35-4 1,1-dce Y 89 H

21 1,2-dichloroethylene, ethylene 

dichloride

C2H4Cl2 Y 1,252 

(10.45)

N 107-06-2 EDC Y 182 H

 

f Consistent with 40CFR 51.100, tert-butyl acetate shall be considered exempt as a reactive organic compound only for purposes of reactive organic compound 

emissions limitations or reactive organic compound content requirements and will continue to be a reactive organic compound for purposes of all recordkeeping, 

emissions reporting, photochemical dispersion modeling, and inventory requirements which apply to reactive organic compounds. Under proposed amended 

Rule 202, Section D.10.l.2, use of more than 1 gallon per year per stationary source of this compound requires an Authority to Construct and Permit to Operate.
STAFF REPORT - Rule 321 Page N-3

September 20, 2010

Santa Barbara County APCD

ITEM

CHEMICAL OR PRODUCT

(vapor pressure for select 

chemicals and products)

MOLECULAR 

FORMULA OR 

CHEMICAL FAMILY

ROC

ROC 

Content,

grams per 

liter 

(lbs/gal)SUBJECT TO 

40CFR, PART 63, 

SUBPART T

CAS 

No.

ABBREVIATED 

OR POLLUTANT 

CODE

TACb IBPc

(°F)

HIGH OR 

LOW 

VOLATILITY 

SOLVENTd

22 1,1-dichloro-1-fluoroethane C2H3Cl2F N 0 (0) N 1717-00-6 HCFC141bN 90 H

23 3,3-dichloro-1,1,1,2,2-

pentafluoropropane 

C3HCl2F5 N

g

0 (0) N 422-56-0 HCFC225caN Unavailable Unavailable

24 1,3-dichloro-1,1,2,2,3-

pentafluoropropane (HCFC225cb)

C3HCl2F5 N

g

0 (0) N 507-55-1 HCFC225cbN Unavailable Unavailable

25 diethyl ether, ethyl ether C4H10O Y 713 (5.95) N 60-29-7 N 94 H

26 diethylene glycol C4H10O3 Y 1,117 

(9.32)

N 111-46-6 Y 473 L (if not heated)

27 diethylene glycol dimethyl 

ether, diglyme

C6H14O3 Y 944 (7.88) N 111-96-6 Y 324 L (if not heated)

28 dimethoxyethane, glyme, 

ethylene glycol dimethyl 

ether, dimethyl cellosolve

C4H10O2 Y 867 (7.24) N 110-71-4 DME Y 185 H

29 dimethyl carbonate C3H6O3 N 0 (0.00) N 616-38-6 DMC N 194 H

30 n,n-dimethyl-formamide, 

dimethyl formamide 

C3H7NO Y 943 (7.87) N 68-12-2 DMF Y 307 H or Lh

31 dimethyl sulfoxide C2H6OS Y 1,091 

(9.11)

N 67-68-5 DMSO N 372 L (if not heated)

32 n,n-dimethylacetamide, 

dimethylacetamide

C4H9NO Y 939 (7.84) N 127-19-5 DMac, 

DMA

N 327 L (if not heated)

33 1,4 dioxane C4H8O2 Y 1,032 

(8.62)

N 123-91-1 Y 214 H

34 ethanol, ethyl alcohol C2H6O Y 788 (6.58) N 64-17-5 N 173 H

35 ethyl acetate C4H8O2 Y 893 (7.46) N 141-78-6 N 171 H

36 ethylene glycol (0.06 mm Hg 

@ 20°C)

C2H6O2 Y 789 (6.59) N 107-21-1 Y 383 L (if not heated)

37 formic acid CH2O2 Y 1,209 

(10.09)

64-18-6 N 212 H

 

g Consistent with 40CFR 51.100, this compound is not considered to be a reactive organic compound. However, under PAR 202, Section D.10.l, use of more 

than 1 gallon per year per stationary source of this compound requires an Authority to Construct and Permit to Operate.

h The solvent may be a high or a low volatility solvent depending on the solvent's in-use temperature.
STAFF REPORT - Rule 321 Page N-4

September 20, 2010

Santa Barbara County APCD

ITEM

CHEMICAL OR PRODUCT

(vapor pressure for select 

chemicals and products)

MOLECULAR 

FORMULA OR 

CHEMICAL FAMILY

ROC

ROC 

Content,

grams per 

liter 

(lbs/gal)SUBJECT TO 

40CFR, PART 63, 

SUBPART T

CAS 

No.

ABBREVIATED 

OR POLLUTANT 

CODE

TACb IBPc

(°F)

HIGH OR 

LOW 

VOLATILITY 

SOLVENTd

38 glycerin C3H8O3 Y 1,260 

(10.52)

N 56-81-5 N 554 L (if not heated)

39 heptane C7H16 Y 684 (5.70) N 142-82-5 N 209 H

40 hexane C6H14 Y 660 (5.50) N 110-54-3 HEX Y 156 H

41 isobutanol, isobutyl alcohol, 2-

methylpropyl alcohol

C4H10O Y 801 (6.69) N 78-83-1 N 226 H

42 isoparaffinic hydrocarbons, 

Isopar G

Hydroheated heavy 

naphtha (petroleum)

Y 749 (6.25) N 64742-48-9 N 333 L (if not heated)

43 isopropyl alcohol, 

isopropanol, 2-propanol

C3H8O or C3H7OH Y 785 (6.55) N 67-63-0 IPA Y 180 H

44 isopropyl alcohol 70% 70% C3H8O or 

C3H7OH and 30% H2O 

mixture 

Y 549 (4.58) N 67-63-0 IPA 70% Y 180 H

45 kerosene Aliphatic petroleum 

hydrocarbons

Y 799 (6.67) N 8008-20-6 N 347 L (if not heated)

46 d-limonene C10H16 Y 839 (7.01) N 5989-27-5 N 352 L (if not heated)

47 methanol, methyl alcohol CH4O Y 799 (6.67) N 67-56-1 Y 148 H

48 1-methoxy-2-acetoxypropane; 

propylene glycol monomethyl 

ether acetate; PGMEA (3.7 

mm of Hg @ 20° C)

C6H12O3 Y 969 (8.09) N 108-65-6 PGMEA Y 295 H

49 2-methoxyethanol, ethylene 

glycol monomethyl ether, 

methyl cellosolve

C3H8O2 Y 964 (8.05) N 109-86-4 EGME Y 255 H

50 methyl acetate C3H6O2 N 0 (0) N 79-20-9 N 134 H

51 methyl t-butyl ether, tert-butyl 

methyl ether

C5H12O Y 741 (6.18) N 1634-04-4 MTBE Y 131 H
STAFF REPORT - Rule 321 Page N-5

September 20, 2010

Santa Barbara County APCD

ITEM

CHEMICAL OR PRODUCT

(vapor pressure for select 

chemicals and products)

MOLECULAR 

FORMULA OR 

CHEMICAL FAMILY

ROC

ROC 

Content,

grams per 

liter 

(lbs/gal)SUBJECT TO 

40CFR, PART 63, 

SUBPART T

CAS 

No.

ABBREVIATED 

OR POLLUTANT 

CODE

TACb IBPc

(°F)

HIGH OR 

LOW 

VOLATILITY 

SOLVENTd

52 methyl ethyl ketone, 2-

butanone

C4H8O Y 809 (6.76) N 78-93-3 MEK Y 176 H

53 methyl formate; formic acid 

methyl ester, methyl 

methanoate (476 mm of Hg at 

20° C)

HCOOCH3 N

i

0 (0) N 107-31-3 N 90 H

54 methyl isobutyl ketone C6H12O Y 799 (6.67) N 108-10-1 MIBK Y 243 H

55 methyl nonafluoroisobutyl 

ether and methyl 

nonafluorobutyl ether (mix)

(CF3)2CFCF2OCH3 &

C4F9OCH3

N

i

0 0 163702-08-

7 & 

163702-07-

6

HFE7100 (2 

Isomers)

N 142 H

56 n-methyl-2-pyrrolidone 

(NMP), n-methylpyrrolidone 

(<1 mm of Hg @ 20° C)

C5H9NO Y 1,027 

(8.57)

N 872-50-4 NMP N 396 L (if not heated)

57 methylene chloride, 

dichloromethane 

CH2Cl2 N 0 (0) Y 75-09-2 METH 

or DCM

Y 102 H

58 mineral spirits 66/3 (< 1 mm 

of Hg @ 20o C)

C9-C13 Alkanes and 

Cycloalkanes

Y 779 (6.51) N 64742-47-8 N 318 L (if not heated)

59 naphtha: solvent, medium 

aliphatic solvent naphtha 

(petroleum) (< 5 mm of Hg @ 

20o C)j

Mixture of n- and isoparaffins, aromatic 

hydrocarbons, and 

naphthenes

Y 784 (6.55) N 64742-88-7 N 266 H

60 nitromethane CH3NO2 Y 1,137 

(9.49)

N 75-52-5 N 212 H

61 parachlorobenzotrifluoride C7H4ClF3 N 0 (0) N 98-56-6 PCBTF N 282 H

62 pentane C5H12 Y 626 (5.22) N 109-66-0 N 97 H

63 perchloroethylene, 

tetrachloroethylene

C2Cl4 N 0 (0) Y 127-18-4 PERC or 

PERCH

Y 250 H

64 1-propanol, n-propanol, mpropyl alcoholC3H8O Y 802 (6.70) N 71-23-8 N 207 H

 

i Consistent with 40CFR 51.100, this compound is not considered to be a reactive organic compound. However, under PAR 202, Section D.10.l, use of more 

than 1 gallon per year per stationary source of this compound requires an Authority to Construct and Permit to Operate.

j This solvent could be confused with VM&P Naphtha – CAS 8032-32-4.
STAFF REPORT - Rule 321 Page N-6

September 20, 2010

Santa Barbara County APCD

ITEM

CHEMICAL OR PRODUCT

(vapor pressure for select 

chemicals and products)

MOLECULAR 

FORMULA OR 

CHEMICAL FAMILY

ROC

ROC 

Content,

grams per 

liter 

(lbs/gal)SUBJECT TO 

40CFR, PART 63, 

SUBPART T

CAS 

No.

ABBREVIATED 

OR POLLUTANT 

CODE

TACb IBPc

(°F)

HIGH OR 

LOW 

VOLATILITY 

SOLVENTd

65 n-propyl bromide; 1-

bromopropane; 1-propyl 

bromide (112mm of Hg at 20° 

C)

C3H7Br Y 1,352

(11.28)

N 106-94-5 nPB N 160 H

66 propylene carbonate C4H6O3 N 1,204 

(10.05)

N 108-32-7 N 464 L (if not heated)

67 pyridine C5H5N Y 981 (8.19) N 110-86-1 N 239 H

68 Safety Kleen 105 (0.4 mm of 

Hg at 20° C)

99 to 100 percent 

distillates (petroleum), 

hydrotreated light

Y 784 (6.55) N 64742-47-8 

(~99%) & 

127-18-4

Unknown

310 H or Lk

69 Stoddard solvent >65% C10 or higher 

hydrocarbons

Y 789 (6.59) N 8052-41-3 Unknown313 H or Ll

70 styrene, styrene monomer, 

vinyl benzene

C8H8 Y 909 (7.60) N 100-42-5 Y 293 H or Ll

71 tetrahydrofuran C4H8O Y 885 (7.39) N 109-99-9 THF N 151 H

72 toluene (21.86 mm of Hg @ 

20° C)

C7H8 Y 866 (7.23) N 108-88-3 Y 231 H

73 1,1,2-trichloro-1,2,2-

trifluoroethane 

CCl2F-CClF2 N 0 (0) N 76-13-1 CFC-113 Y 117 H

74 1,1,1-trichloroethane; methyl 

chloroform

CH3CCl3 N 0 (0) Y 71-55-6 TCA Y 165 H

75 trichloroethylene; 1,1,2-

trichloroethene; 1,2,2-

trichloroethylene

C2HCl3 Y 1,459 

(12.18)

Y 79-01-6 TCE Y 189 H

76 trichlorofluoromethane CCl3F N 0 (0) N 75-69-4 CFC-11 Y 75 H

77 turpentine C10H16 (approximate 

formula); turpentine has 

a minimum alphapinene content of 40 

percent by weight

Y 859 (7.17) N 8006-64-2 Unknown302 H or Ll

 

k The solvent may be a high or a low volatility solvent depending on the solvent's in-use temperature.
STAFF REPORT - Rule 321 Page N-7

September 20, 2010

Santa Barbara County APCD

ITEM

CHEMICAL OR PRODUCT

(vapor pressure for select 

chemicals and products)

MOLECULAR 

FORMULA OR 

CHEMICAL FAMILY

ROC

ROC 

Content,

grams per 

liter 

(lbs/gal)SUBJECT TO 

40CFR, PART 63, 

SUBPART T

CAS 

No.

ABBREVIATED 

OR POLLUTANT 

CODE

TACb IBPc

(°F)

HIGH OR 

LOW 

VOLATILITY 

SOLVENTd

78 VM&P naphtha, petroleum 

ether, petroleum naphtha (14 

mm of Hg @ 20o C)

l

Aliphatic petroleum 

hydrocarbons (may also 

contain aliphatic 

petroleum distillate 

(CAS 64742-89-8))

Y 758 (6.32) N 8032-32-4 Unknown244 H

79 X-Caliber {< 65% n-methyl-2-

pyrrolidone [NMP] and ≥ 35% 

d-limonene}

Mixture of C5H9NO 

and C10H16

Y 919 (7.67) N 872-50-4 

and 5989-

27-5

N 370 L (if not heated)

80 m-xylene C8H10 Y 867 (7.24) N 108-38-3 Y 282 H or Lm

81 o-xylene C8H10 Y 896 (7.48) N 95-47-6 Y 291 H or Lm

82 p-xylene C8H10 Y 860 (7.18) N 106-42-3 Y 281 H or Lm

83 xylenes C8H10 (C6H4C2H6) Y 863 (7.21) N 1330-20-7 XYLS Y 281 H or Lm

Click here to return to the list of Appendices in the Staff Report.

 

l This solvent could be confused with naphtha: solvent - CAS 64742-88-7.

m The solvent may be a high or a low volatility solvent depending on the solvent's in-use temperature.
THIS PAGE INTENTIONALLY LEFT BLANK
STAFF REPORT - Rule 321 Page O-1

September 20, 2010

Santa Barbara County APCD - PAR 102 [date of amended rule adoption]

Appendix O

Santa Barbara County 

Proposed Amended Rules without Strikeout and Underlined Formatting

RULE 102. DEFINITIONS. (Adopted 10/18/1971, revised 1/12/1976, readopted 10/23/1978, revised 

7/11/1989, 7/10/1990, 7/30/1991, 7/18/1996, 4/17/1997, 1/21/1999, 5/20/1999, 6/19/2003, 

1/20/2005, 6/19/2008, and 1/15/2009), and [date of revised rule adoption])

These definitions apply to the entire rulebook. Definitions specific to a given rule are defined in that rule or in the 

first rule of the relevant regulation. Except as otherwise specifically provided in these Rules where the context 

otherwise indicates, words used in these Rules are used in exactly the same sense as the same words are used in 

Division 26 of the Health and Safety Code.

[. . .]

“Application Equipment” means a device or equipment used to apply solvent, sealant, adhesive, coating, ink, 

or polyester resin materials.

[. . .]

“Coating” means a material applied onto or impregnated into a substrate for protective, decorative, or 

functional purposes. Such materials include, but are not limited to, paints, varnishes, sealers, and stains.

[. . .]

“Cured Adhesive, Cured Coating, or Cured Ink” means an adhesive, coating, or ink that is dry to the touch.

[. . .]

“Degreaser” has the same meaning as “Solvent Cleaning Machine.”

[. . .]

“Flexographic Printing” means any printing method in which the image area is raised relative to the nonimage area and utilizes flexible rubber or other elastomeric plate and rapid drying liquid inks.

[. . .]

“Janitorial Cleaning” means the cleaning of building or facility components including, but not limited to, 

floors, ceilings, walls, windows, doors, stairs, bathrooms, furnishings, and exterior surfaces of office 

equipment; excluding the cleaning of work areas associated with:

1. research and development, manufacturing, and repair activities; and 

2. laboratory tests and analyses (including quality assurance and quality control activities) and bench 

scale projects.

[. . .]

“Organic Solvents” means organic materials, including diluents and thinners which are liquid at standard 

conditions and which are used as, dissolvers, viscosity reducers or cleaning agents, except that such materials 

which exhibit a boiling point, as measured using ASTM D 1078-05, “Standard Test Method for Distillation 

Range of Volatile Organic Liquids,” ASTM International, higher than 220F at 0.5 millimeter mercury 

absolute pressure or having an equivalent vapor pressure shall not be considered to be organic solvents unless 

exposed to temperatures exceeding 220F.

[. . .]
STAFF REPORT - Rule 321 Page O-2

September 20, 2010

Santa Barbara County APCD - PAR 102 [date of amended rule adoption]

“Photochemically Reactive Solvent” means any organic solvent with an aggregate of more than 20 percent of 

its total volume composed of the chemical compounds classified below or which exceeds any of the following 

individual percentage composition limitations, referred to the total volume of organic solvent;

1. combination of hydrocarbons, alcohols, aldehydes, esters, ethers or ketones, having an olefinic or 

cyclolefinic type of unsaturation: 5 percent, or

2. combination of aromatic compounds with 8 or more carbon atoms to the molecule, except 

ethylbenzene: 8 percent, or

3. combination of ethylbenzene, ketones having branched hydrocarbon structures, trichloroethylene 

or toluene: 20 percent.

Whenever any organic solvent or any constituent of an organic solvent may be classified from its 

chemical structure into more than one of the above groups of organic compounds, it shall be considered 

as a member of the most reactive chemical group, i.e., that group having the least allowable percent of 

the total volume of organic solvents.

[. . .]

“Reactive Organic Compound” means any compound containing at least one (1) atom of carbon, except for 

the following exempt compounds: 

1. acetone

2. ammonium carbonate

3. carbon dioxide

4. carbon monoxide

5. carbonic acid

6. dimethyl carbonate

7. ethane

8. metallic carbides or carbonates

9. methane

10. methyl acetate

12. methyl chloroform (1,1,1-trichloroethane)

12. methyl formate; HCOOCH3

13. cyclic, branched, or linear completely methylated siloxane compounds

14. methylene chloride

15. parachlorobenzotrifluoride

16. perchloroethylene (tetrachloroethylene)

17. the following four classes of perfluorocarbon (PFC) compounds: 

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 sulfur bonds only to 

carbon and fluorine.

18. propylene carbonate

19. tertiary-butyl acetate; C6H12O2 (“acetic acid, 1,1-dimethylethyl ester”)

Tertiary-butyl acetate (also known as t-butyl acetate or tBAc) shall be considered exempt as a 

reactive organic compound only for purposes of reactive organic compound emissions limitations 

or reactive organic compound content requirements and will continue to be a reactive organic 

compound for purposes of all recordkeeping, emissions reporting, photochemical dispersion 

modeling, and inventory requirements which apply to reactive organic compounds.

20. CFC-11 (trichlorofluoromethane)

21. CFC-12 (dichlorodifluoromethane)
STAFF REPORT - Rule 321 Page O-3

September 20, 2010

Santa Barbara County APCD - PAR 102 [date of amended rule adoption]

22. CFC-113 (1,1,2-trichloro-1,2,2-trifluoroethane)

23. CFC-114 (1,2-dichloro 1,1,2,2-tetrafluoroethane)

24. CFC-115 (chloropentafluoroethane)

25. HCFC-22 (chlorodifluoromethane)

26. HCFC-31 (chlorofluoromethane)

27. HCFC-123 (1,1,1-trifluoro 2,2-dichloroethane)

28. HCFC-123a (1,2-dichloro-1,1,2-trifluoroethane)

29. HCFC-124 (2-chloro-1,1,1,2-tetrafluoroethane)

30. HCFC-141b (1,1-dichloro 1-fluoroethane)

31. HCFC-142b (1-chloro-1,1 difluoroethane)

32. HCFC-151a (1-chloro-1-fluoroethane)

33. HCFC-225ca (3,3-dichloro-1,1,1,2,2-pentafluoropropane) 

34. HCFC-225cb (1,3-dichloro-1,1,2,2,3-pentafluoropropane) 

35. HFC-23 (trifluoromethane)

36. HFC-32 (difluoromethane)

37. HFC-43-10mee (1,1,1,2,3,4,4,5,5,5-decafluoropentane)

38. HFC-125 (pentafluoroethane)

39. HFC-134 (1,1,2,2-tetrafluoroethane)

40. HFC-134a (1,1,1,2-tetrafluoroethane)

41. HFC-143a (1,1,1-trifluoroethane)

42. HFC-152a (1,1-difluoroethane)

43. HFC-161 (ethylfluoride)

44. HFC-236ea (1,1,1,2,3,3-hexafluoropropane)

45. HFC-236fa (1,1,1,3,3,3-hexafluoropropane)

46. HFC-245ca (1,1,2,2,3-pentafluoropropane)

47. HFC-245ea (1,1,2,3,3-pentafluoropropane)

48. HFC-245eb (1,1,1,2,3-pentafluoropropane)

49. HFC-245fa (1,1,1,3,3-pentafluoropropane) 

50. HFC-365mfc (1,1,1,3,3-pentafluorobutane)

51. HFE-7100; (CF3)2CFCF2OCH3; (2-(difluoromethoxymethyl)-1,1,1,2,3,3,3-heptafluoropropane) or 

C4F9OCH3; (1,1,1,2,2,3,3,4,4-nonafluoro-4-methoxy-butane)

52. HFE-7200; (CF3)2CFCF2OC2H5; (2-(ethoxydifluoromethyl)-1,1,1,2,3,3,3-heptafluoropropane) or 

C4F9OC2H5; (1-ethoxy-1,1,2,2,3,3,4,4,4-nonafluorobutane)

Rule 202.D.10.l.1 requires an Authority to Construct and Permit to Operate when using more than one gallon 

per year per stationary source of any one of the following exempt compounds: dimethyl carbonate, methyl 

formate, HCFC-225ca, HCFC-225cb, HFC-43-10mee, HFC-245fa, HFC-365mfc, or HFE-7100 

[(CF3)2CFCF2OCH3 or C4F9OC2H5]. Rule 202.D.10.l.2 requires an Authority to Construct and Permit to 

Operate when using more than one gallon per year per stationary source of tertiary-butyl acetate. The one 

gallon per year per stationary source limit is a per compound limit for each compound in aggregate for the 

entire stationary source and includes any amounts of the compound used in mixed or diluted product.

[. . .]

“Rotogravure Printing” means any printing process where the image area is etched or engraved relative to 

the surface of the image cylinder. Ink is transferred from minute etched wells on a plate cylinder to a 

substrate, which is supported by an impression roller, with excess ink removed by a doctor blade. The 

substrate is fed through the printing press in continuous rolls.

[. . .]
STAFF REPORT - Rule 321 Page O-4

September 20, 2010

Santa Barbara County APCD - PAR 102 [date of amended rule adoption]

“Solvent" means “Organic Solvent.”

“Solvent Cleaning” means any activity, operation, or process (including, but not limited to, surface 

preparation, cleanup, or wipe cleaning) performed outside of a solvent cleaning machine, that uses solvent to 

remove uncured adhesives, uncured coatings, uncured inks, uncured polyester resin material, uncured sealant,

or other contaminants, including, but not limited to, dirt, soil, oil, lubricants, coolants, moisture, fingerprints, 

and grease, from parts, products, tools, machinery, application equipment, and general work areas. Cleaning 

spray equipment used for the application of coating, adhesive, ink, polyester resin material, or sealant is also 

considered to be solvent cleaning irrespective of the spray material being cured.

“Solvent Cleaning Machine” means any device or piece of equipment that uses solvent liquid or vapor to 

remove soils, moisture, or other contaminants from the surfaces of materials. Types of solvent cleaning 

machines include, but are not limited to, batch cold, batch vapor, in-line cold, in-line vapor, remote reservoir, 

and gas-path solvent cleaners, as defined in Rule 321. Buckets, pails, and beakers with capacities of 3.785 

liters (1.00 gallon) or less are not considered solvent cleaning machines. However, the use of such a 

container or similar containers (e.g., hand-held spray bottles) with a liquid solvent for cleaning is considered 

to be solvent cleaning. Any device or piece of equipment used exclusively for stripping shall not be 

considered to be a solvent cleaning machine.

[. . .]

“Stripping” means the use of solvent to remove materials such as cured adhesives, cured inks, cured sealants, 

cured or dried paints, cured or dried paint residues, or temporary protective coatings.

“Surface Preparation” means the removal of contaminants such as dust, soil, oil, grease, moisture, etc., prior 

to application of an adhesive, coating, ink, polyester resin material, or sealant.

[. . .]

“Toxic Air Contaminant” means “Toxic air contaminant” as defined in Health and Safety Code Section 

39655.

[. . .]

“Wipe Cleaning” means a solvent cleaning activity performed by hand rubbing an absorbent material such as 

a rag, paper, sponge, brush, or cotton swab containing solvent. 

[. . .]
STAFF REPORT - Rule 321 Page O-5

September 20, 2010

Santa Barbara County APCD - PAR 202 [date of amended rule adoption]

RULE 202. EXEMPTIONS TO RULE 201. (Adopted 10/18/1971, revised 5/1/1972 and 6/27/1977, 

readopted 10/23/1978, revised 12/7/1987, 1/11/1988, 1/17/1989, 7/10/1990, 7/30/1991, 

11/05/1991, 3/10/1992, 5/10/1994, 6/28/1994, 4/17/1997, 3/17/2005, 1/17/2008, 6/19/2008, and 

[date of revised rule adoption])

[. . .]

D. General Provisions [. . .]

5. Temporary Equipment

[. . .] The owner or operator shall pay any applicable fee pursuant to Rule 210, Fees.

[. . .]

7. Stationary Source Permit Exemption

[. . .] The owner or operator shall pay any applicable fee pursuant to Rule 210, Fees.

[. . .]

10. Notwithstanding any exemption defined in this rule, no new or modified stationary source that has 

the potential to emit air contaminants in excess of the amounts specified shall be exempt from 

permit requirements:

[. . .]

 k. 40 tons per year municipal waste combustor acid gases. 

 l. In addition, notwithstanding any exemption defined in this rule, no stationary source that 

has the potential to emit any air contaminants in excess of the amounts specified shall be 

exempt from permit requirements:

l. more than one gallon per year of any one of the exempt compounds listed 

below. The one gallon per year per stationary source limit is a per compound 

limit for each compound in aggregate for the entire stationary source and 

includes any amounts of the compound used in mixed or diluted product.

a) dimethyl carbonate; or

b) methyl formate; HCOOCH3; or

c) HCFC-225ca (3,3-dichloro-1,1,1,2,2-pentafluoropropane); or

d) HCFC-225cb (1,3-dichloro-1,1,2,2,3-pentafluoropropane); or

e) HFC-43-10mee (1,1,1,2,3,4,4,5,5,5-decafluoropentane); or

f) HFC-245fa (1,1,1,3,3-pentafluoropropane); or

g) HFC-365mfc (1,1,1,3,3-pentafluorobutane); or

h) HFE-7100; (CF3)2CFCF2OCH3; (2-(difluoromethoxymethyl)-

1,1,1,2,3,3,3-heptafluoropropane); or 

i) HFE-7100; C4F9OCH3; (1,1,1,2,2,3,3,4,4-nonafluoro-4-methoxybutane); or
STAFF REPORT - Rule 321 Page O-6

September 20, 2010

Santa Barbara County APCD - PAR 202 [date of amended rule adoption]

2. more than one gallon per year of tertiary-butyl acetate; C6H12O2 (“acetic acid, 

1,1-dimethylethyl ester”). Tertiary-butyl acetate (also known as t-butyl acetate 

or tBAc) shall be considered exempt as a reactive organic compound only for 

purposes of reactive organic compound emissions limitations or reactive organic 

compound content requirements and will continue to be a reactive organic 

compound for purposes of all recordkeeping, emissions reporting, 

photochemical dispersion modeling, and inventory requirements which apply to 

reactive organic compounds. The one gallon per year per stationary source limit 

for tertiary-butyl acetate is an aggregate limit for the entire stationary source and 

includes any amounts of the compound used in mixed or diluted product. 

[. . .]

E. Compliance with Rule Changes

[. . .]

If no application is filed within the ninety (90) day period, the application filing fee prescribed in Rule 210, 

Fees, shall be doubled and the equipment owner shall be subject to a Notice of Violation and to the penalty 

provisions set forth in California Health and Safety Code Sections 42400 et seq.

[. . .]

F. Internal Combustion Engines 

[. . .]

5. [. . .] The owner or operator shall pay any applicable fee pursuant to Rule 210, Fees. [. . .] 

[. . .]

7. [. . .] The owner or operator shall pay any applicable fee pursuant to Rule 210, Fees. [. . .] 

8. [. . .] The owner or operator shall pay any applicable fee pursuant to Rule 210, Fees. [. . .]

[. . .]

I. Coatings Applications Equipment and Operations 

The following listed coating applications equipment and operations are exempt from permit requirements. 

[. . .]

3. Equipment used in surface coating operations provided that the total amount of coatings and 

solvents used does not exceed 55 gallons per year. [. . .] Solvents meeting the criteria of Section 

U.2.b or Section U.2.c or that have a reactive organic compound content of 50 grams per liter or 

less, as determined by the Environmental Protection Agency Reference Method 24, do not 

contribute to the 55 gallons per year per stationary source limitation. [. . .]

6. Unheated non-conveyorized coating dip tanks of 100 gallons or less capacity.

[. . .]

K. Food Processing and Preparation Equipment

[. . .]

7. [. . .] The owner or operator shall pay any applicable fee pursuant to Rule 210, Fees.

[. . .]
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September 20, 2010

Santa Barbara County APCD - PAR 202 [date of amended rule adoption]

P. Miscellaneous Equipment and Operations

[. . .]

14. [. . .] The owner or operator shall pay any applicable fee pursuant to Rule 210, Fees. [. . .]

[. . .]

U. Solvent Application Equipment and Operations

The following solvent cleaning, solvent cleaning machines and their operations are exempt from permit 

requirements. Notwithstanding the listed exemptions, any collection of articles, machines, equipment or 

other contrivances within each listed equipment category at a stationary source that has aggregate 

emissions in excess of 10 tons per calendar year of any affected pollutant is not exempt.

1. Unheated nonconveyorized solvent rinsing containers of 1.00 gallon or less capacity provided that 

solvent cleaning performed in association with such containers complies with the requirements in 

Rule 321, Solvent Cleaning Machines and Solvent Cleaning.

2. Single solvent cleaning machines, which use unheated solvent, and which:

a. have a liquid surface area (i.e., the area of the drain for remote reservoir cleaning 

machines or the solvent/air interface area for other solvent cleaning machines) of less 

than 929 square centimeters (1.0 square foot), unless the aggregate liquid surface area of 

all solvent cleaning machines at a stationary source, covered by this exemption is greater 

than 0.929 square meter (10 square feet), or

b. use only solvents with an initial boiling point of 150 degrees Celsius (302 degrees 

Fahrenheit) or greater as determined by ASTM D-1078-05, “Standard Test Method for 

Distillation Range of Volatile Organic Liquids,” ASTM International, or

c. use solvents with a reactive organic compound content of two percent or less by weight 

as determined by Environmental Protection Agency Method 24.

d. The liquid surface area of any solvent cleaning machine using the following solvent shall 

not be counted towards the 0.929 square meter (10 square feet) aggregate limit in 

subsection a. above:

i. any solvent that has a reactive organic compound content of 50 grams per liter 

or less, as determined by the Environmental Protection Agency Method 24, or

ii. any solvent exempt pursuant to subsection b. or subsection c. above.

3. Wipe cleaning operations, provided that the solvents used do not exceed 55 gallons per year per 

stationary source and that the solvent cleaning complies with the requirements in Rule 321, 

Solvent Cleaning Machines and Solvent Cleaning. 

To qualify for this exemption, the owner or operator shall maintain records of the amount (gallons 

per year) of solvents used for wipe cleaning at the stationary source for each calendar year. 

These records shall be maintained on site for at least 3 years and be made available to the District 

on request. Thereafter, the records shall be maintained either on site or readily available for 

expeditious inspection and review for an additional 2 years. Solvents meeting the criteria of 2.b. 

or c. above or that have a reactive organic compound content of 50 grams per liter or less, as 

determined by the Environmental Protection Agency Reference Method 24, do not contribute to 

the 55 gallons per year per stationary source limitation.
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September 20, 2010

Santa Barbara County APCD - PAR 202 [date of amended rule adoption]

4. Notwithstanding the Section U.3 exemption above, solvent cleaning to disinfect and 

decontaminate surfaces and equipment in hospitals, clinics, medical facilities, dentistry facilities, 

and other health care facilities, including but not limited to, sanatoriums, convalescent hospitals, 

convalescent homes, skilled nursing facilities, nursing homes, blood banks, and bloodmobiles.

5. Notwithstanding the Section U.3 exemption above, solvent cleaning associated with janitorial 

cleaning, including graffiti removal.

[. . .]
STAFF REPORT - Rule 321 Page O-9

September 20, 2010

Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

RULE 321. SOLVENT CLEANING MACHINES AND SOLVENT CLEANING. (Adopted 2/24/1975, 

readopted 10/23/1978, revised 6/11/1979, 7/10/1990, 4/17/1997, 7/17/1997, 9/18/1997, and 

[date of revised rule adoption])

A. Applicability

This rule shall apply to any person who owns, operates, or uses any solvent cleaning machine or performs 

any solvent cleaning operation outside of a solvent cleaning machine during the production, repair, 

maintenance, or servicing of parts, products, tools, machinery, equipment, or in general work areas at any 

stationary source.

B. Exemptions 

Except as otherwise specifically provided herein, the provisions of this rule shall not apply to the following:

1. Any solvent cleaning machine equipped with and any solvent cleaning performed with a solvent 

(including emulsions) that contains two percent by weight or less of each of the following:

a. Reactive organic compounds (as determined by Environmental Protection Agency 

method 24), and

b. Toxic air contaminants (as determined by generic solvent data, solvent manufacturer‟s 

composition data or by a gas chromatography test and a mass spectrometry test). 

c. Any person claiming this exemption shall maintain the records specified in Sections 

R.1.a.1) and R.1.a.2) in a manner consistent with Section R.3 and make them available 

for review.

2. The cleaning of architectural coating application equipment provided that the solvent used does 

not exceed 950 grams of reactive organic compound per liter of material. 

3. Dry cleaning operations of clothing or other fabrics covered under Rule 320, Petroleum Solvent 

Dry Cleaners, or California Code of Regulations Title 17, Section 93109, Airborne Toxic Control 

Measure for Emissions of Perchloroethylene from Dry Cleaning and Water-Repelling Operations.

4. Stripping of cured coatings, cured adhesives, cured sealants, and cured inks, except the stripping 

of such materials from spray application equipment. 

5. Notwithstanding Section B.1, any solvent cleaning machine that uses any halogenated hazardous 

air pollutant solvent provided such a solvent cleaning machine is subject to 40 CFR, Part 63, 

Subpart T, National Emission Standards for Halogenated Solvent Cleaning (Sections 63.460 et. 

seq.). 

6. Any equipment or operation that is subject to or specifically exempted by any of the following 

District rules.

a. Rule 325, Crude Oil Production and Separation.

b. Rule 326, Storage of Reactive Organic Compound Liquids.

c. Rule 330, Surface Coating of Metal Parts and Products.

d. Rule 337, Surface Coating of Aircraft or Aerospace Vehicle Parts and Products.

e. Rule 339, Motor Vehicle and Mobile Equipment Coating Operations.

f. Rule 343, Petroleum Storage Tank Degassing.
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September 20, 2010

Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

g. Rule 344, Petroleum Sumps, Pits and Well Cellars.

h. Rule 349, Polyester Resin Operations.

i. Rule 351, Surface Coating of Wood Products.

j. Rule 353, Adhesives and Sealants.

k. Rule 354, Graphic Arts.

7. Janitorial cleaning, including graffiti removal.

8. Provisions of Sections H.7, I.7, K.6, and, M.1 shall not apply to the following:

a. Cleaning of solar cells, laser hardware, scientific instruments, high-precision optics, 

telescopes, microscopes, avionic equipment, and aerospace and military fluid systems; 

and

b. Cleaning in laboratory tests and analyses, including quality assurance and quality control 

applications, bench scale projects, or short-term (less than 2 years) research and 

development projects; and

c. Cleaning of cotton swabs to remove cottonseed oil before cleaning of high-precision 

optics.

d. In addition, the provisions of Sections H.7, I.7, and K.6 shall not apply to solvent 

cleaning machines employed with solvents having 900 grams of reactive organic 

compound per liter of material or less during the production, repair, maintenance, or 

servicing of electrical apparatus components, electronic components, satellites, satellite 

components, aerospace vehicles, aerospace vehicle components, aerospace vehicle 

payloads, aerospace vehicle payload components, medical devices, or silicone 

manufacturing.

9. Solvent cleaning with aerosol products shall not be subject to Section D.9 and Section M.1 

provisions and the Section M.2.c prohibition on solvent atomization provided:

a. 160 fluid ounces or less of aerosol products are used per day, per facility, and

b. Records are maintained as specified in Sections R.2 and R.3, and

c. The aerosol products comply with volatile organic compound limits for consumer 

products specified in the California Code of Regulations, Title 17, Section 94507 et seq. 

10. Provisions of Section M.1, Table 1, Solvent Cleaning Activity (c) shall not apply to the cleaning 

of application equipment when such equipment is used to apply a coating on a satellite or when 

applying a radiation-effect coating.

11. Section D.9 and M.2.c prohibitions on solvent atomization shall not apply to the following 

applications:

a. Cleaning of the nozzle tips of automated spray equipment systems, except for robotic 

systems.

b. Cleaning with hand-held spray bottles, squirt bottles, and other closed containers having a 

capacity of one liter or less.

c. Cleaning of gas turbines or jet engines using a gas-path solvent cleaner.
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September 20, 2010

Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

12. De-icing of aircraft and aerospace vehicles. 

13. Solvent cleaning with a solvent containing 50 grams of reactive organic compounds per liter of 

material or less shall not be subject to the Section D.9 provision.

14. Solvent cleaning to disinfect and decontaminate surfaces and equipment in hospitals, clinics, 

medical facilities, dental care facilities, and other health care facilities, including but not limited 

to, sanatoriums, convalescent hospitals, convalescent homes, skilled nursing facilities, nursing 

homes, blood banks, and bloodmobiles.

15. Provisions of Section M.1 shall not apply if the net aggregate amount of solvent used for all 

solvent cleaning subject to Rule 321 (i.e., subject to Sections D, M.2, and/or M.3 provisions) at a 

stationary source does not exceed 55 gallons per year. Solvents with a reactive organic compound 

content of 50 grams per liter of material or less do not count towards the 55 gallons per year 

aggregate limit. Any person claiming this exemption shall maintain records as specified in 

Sections R.2 and R.3. 

16. Provisions of Section M.1 shall not apply to the following applications:

a. Cleaning of ultraviolet lamps used to cure ultraviolet inks coatings, adhesives, or resins.

b. Cleaning of mold release compounds from molds.

c. Cleaning of aerospace assembly and subassembly surfaces that are exposed to strong 

oxidizers or reducers such as nitrogen tetroxide, liquid oxygen, or hydrazine.

d. Cleaning of paper gaskets.

e. Cleaning of clutch assemblies where rubber is bonded to metal by means of an adhesive. 

f. Cleaning of hydraulic actuating fluid from filters and filter housings.

g. Wipe cleaning to remove crude oil and crude oil residue from well workover, drilling 

operations, and other activities related to petroleum production and processing on 

offshore platforms, provided the solvent reactive organic compound content does not 

exceed 800 grams per liter of material and the reactive organic compound composite 

partial pressure is no more than 8 millimeters of mercury at 20 degrees Celsius. 

17. Provisions of Sections H.7, I.7, and K.6 shall not apply to the following applications, provided the 

solvent reactive organic compound content does not exceed 900 grams per liter of material and the 

reactive organic compound composite partial pressure is no more than 5 millimeters of mercury at 

20 degrees Celsius:

a. Cleaning associated with the manufacturing of nuts and bolts designed for automotive 

racing applications.

b. Cleaning of precision–lapped mechanical seals in pumps that handle liquefied gasses.

18. Provisions of Sections J.11.a, d, and e shall not apply to batch vapor cleaning machines with a 

solvent/air interface area less than 929 square centimeters (1 square foot) or a solvent capacity less 

than 2 gallons, provided all such solvent cleaning machines emit, in aggregate, less than 55 

pounds of reactive organic compounds per month per stationary source. Any person claiming this 

exemption shall maintain records as specified in Sections R.1 and R.3. 

19. The use of solvent for purposes other than cleaning.

20. The Section E.7 and Section J.11.a, d, and e provisions shall not apply to batch vapor cleaning 

machines provided:
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September 20, 2010

Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

a. The equipment was installed before January 1, 2007; and

b. The solvent/air interface area is less than 4.40 square feet or the solvent capacity is less 

than 2 gallons; and 

c. The equipment is used only for cleaning electronic components; and

d. The total aggregate reactive organic compound emissions from all batch vapor cleaning 

machines subject to this exemption do not exceed 188 pounds per month per stationary 

source; and

e. The equipment is subject to a Permit to Operate to help facilitate verifications that the 

requirements of subparagraphs B.20.a, b, c, and d are met.

f. In addition, the Section J.8 requirement to have a freeboard ratio of 1.0 or greater shall 

not apply to solvent cleaning machines meeting the requirements in subsections a – e 

above, provided the solvent cleaning machines have a freeboard ratio of 0.75 or greater.

21. The Section I.3, I.4, and I.7 requirements for unheated batch cleaning machines shall not apply, 

provided the equipment is used in medical device manufacturing when performing incidental 

product cleaning in conjunction with quality assurance or quality control tests (e.g., when 

conducting leak testing of silicone shells) and the solvent reactive organic compound content does 

not exceed 900 grams per liter of material.

22. Metal lift-off and other semiconductor and microelectromechanical device manufacturing 

processes involving thin film deposition, vacuum deposition, and dry etching operations; including 

any maintenance activities associated with such operations.

23. The solvent container draining and filling provisions in Section D.12 shall not apply to solvent 

transfers out of a sump, provided the sump has a maximum capacity of 8 gallons or less, such 

sump is easily removed from the solvent cleaning machine, and the solvent is poured from the 

sump directly into a bulk storage container.

24. Any batch vapor cleaning machine meeting all of the following requirements shall be exempt from 

the Section J.8 requirement to have a freeboard ratio of 1.0:

a. The equipment is used only for cleaning electronic components; and

b. The dimensions are such that the freeboard ratio is 0.75 or greater; and

c. The solvent cleaning machine is equipped with the freeboard refrigeration device for 

which the chilled air blanket temperature (expressed in degrees Fahrenheit) at the coldest 

point on the vertical axis in the center of the air blanket shall be no greater than 30 

percent of the initial boiling point (expressed in degrees Fahrenheit) of the solvent used 

or no greater than minus 4 degrees Fahrenheit; and

d. The batch vapor cleaning machine is equipped with a superheated vapor zone where parts 

remain in the vapor zone for at least the minimum dwell time, as specified by the 

manufacturer. The temperature within the superheated vapor zone shall be at least 10 

degrees Fahrenheit above the initial boiling point of the solvent being used.

C. Definitions

See Rule 102 for definitions not limited to this rule. For purposes of this rule the following definitions 

shall apply:
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September 20, 2010

Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

“Aerosol Product” means a hand-held, non-refillable container that expels pressurized product by means 

of a propellant-induced force.

“Aerospace Vehicle” means the completed unit of any aircraft, helicopter, missile, or space vehicle. 

“Aerospace Vehicle Component” means any raw material, partial or completed fabricated part, assembly 

of parts, or completed unit of any aircraft, helicopter, missile, or space vehicle, including mockups and 

prototypes.

“Air Blanket” means the layer of air inside the solvent cleaning machine freeboard located above the 

solvent/air interface. 

“Airless Solvent Cleaning Machine” means any solvent cleaning machine that is automatically operated 

and seals at an absolute internal pressure of 0.02 pounds per square inch absolute or less, prior to the 

introduction of solvent vapor into the cleaning chamber and maintains differential pressure under vacuum 

during all cleaning and drying cycles.

“Air-Tight Solvent Cleaning Machine” means any solvent cleaning machine that is automatically 

operated and seals at a differential pressure no greater than 0.5 pounds per square inch absolute during all 

cleaning and drying operations.

“Automated Parts Handling System” means a mechanical device that carries all parts and parts baskets at 

a controlled speed from the initial loading of soiled or wet parts through the removal of the cleaned or dried 

parts. Automated parts handling systems include, but are not limited to, hoists and conveyors. 

“Batch Cleaning Machine” means a solvent cleaning machine in which individual parts or a set of parts 

move through the entire cleaning cycle before new parts are introduced into the solvent cleaning machine. 

An open-top vapor cleaning machine is a type of batch cleaning machine. A solvent cleaning machine, 

such as a Ferris wheel or a cross-rod degreaser, that clean multiple batch loads simultaneously and are 

manually or semi-continuously loaded are batch cleaning machines.

“Bench Scale Project” means a project (other than at a research and development facility) that is operated 

on a small scale, such as one capable of being located on a laboratory bench top.

“Carbon adsorber” means a bed of activated carbon into which an air-solvent gas-vapor stream is routed 

and which adsorbs the solvent on the carbon.

“Carry-out” see “Drag-out.”

“Circumferential Trough” means a receptacle located below the primary condenser that conveys 

condensed solvent and atmospheric moisture to a water separator.

“Cold Cleaning Machine” means any device or piece of equipment that contains and/or uses liquid 

solvent, into which parts are placed to remove soils from the surfaces of the parts or to dry the parts. 

Cleaning machines that contain and use heated, nonboiling solvent to clean the parts are classified as cold 

cleaning machines. Cold solvent wash stations are classified as cold cleaning machines.

“Condenser” or “Primary Condenser” means a series of circumferential cooling coils on a vapor 

cleaning machine through which a chilled substance is circulated or recirculated to provide continuous 

condensation of rising solvent vapors and, thereby, create a concentrated solvent vapor zone.

“Condenser Flow Switch” means a safety switch connected to a thermostat that shuts off the sump heater 

if the condenser coolant is either not circulating or exceeds its designed operating temperature. 

“Continuous Cleaning Machine” see “In-Line Cleaning Machine.”

“Continuous Web Cleaning Machine” means a solvent cleaning machine in which parts such as film, 

coils, wire, and metal strips are cleaned at speeds typically in excess of 11 feet per minute. Parts are 
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September 20, 2010

Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

generally uncoiled, cleaned such that the same part is simultaneously entering and exiting the solvent 

application area of the solvent cleaning machine, and then recoiled or cut. For the purposes of this rule, all 

continuous web cleaning machines are considered to be a subset of in-line solvent cleaning machines.

“Conveyorized (In-Line or Continuous) Cold Cleaning Machine” means any continuously loaded 

solvent cleaning machine that is not a conveyorized vapor cleaning machine. 

“Conveyorized (In-Line or Continuous) Cleaning Machine” means any cold or vapor solvent cleaning 

machine, that uses an automated parts handling system to automatically provide a continuous supply of 

parts to be cleaned. Conveyorized (in-line or continuous) cleaning machines include but are not limited to 

vibra, monorail, mesh, belt, web, and strip cleaning machines. Strip cleaning machines clean material by 

drawing the strip itself through the unit for cleaning prior to coating or other fabrication processes. For the 

purposes of this rule “Conveyorized (In-Line or Continuous) Cleaning Machine” has the same meaning 

as “In-Line Cleaning Machine.” 

“Conveyorized (In-Line or Continuous) Vapor Cleaning Machine” means any continuously loaded 

solvent cleaning machine that immerses parts in boiling solvent or in solvent vapors generated by boiling 

solvent. Conveyorized (in-line or continuous) cleaning machines that contain any vapor cleaning sections 

shall be considered to be conveyorized vapor cleaning machines for the purposes of this rule.

“Cross-Rod Solvent Cleaning Machine” means a batch solvent cleaning machine in which parts baskets 

are suspended from “cross-rods” as they are moved through the machine. In a cross-rod cleaning machine, 

parts are loaded semi-continuously, and enter and exit the machine from a single portal. 

“Downtime Mode” means the time period when a solvent cleaning machine is not cleaning parts and the 

sump heating coils, if present, are turned off.

“Drag-out” means solvent carried out of a solvent cleaning machine that adheres to or is entrapped in the 

part being removed. 

“Drying Tunnel” means an add-on enclosure extending from the exit area of a solvent cleaning machine 

that reduces drag-out losses by containing evaporating solvent. 

“Dwell” means the technique of holding parts within the freeboard area but above the vapor zone of the 

solvent cleaning machine. Dwell occurs after cleaning to allow solvent to drain from the parts or parts 

baskets back into the solvent cleaning machine.

“Dwell Time” means the period of time when parts are held within the freeboard area of the solvent 

cleaning machine, after cleaning, to allow solvent to drain from the parts back into the solvent cleaning 

machine.

“Electrical Apparatus Components” means the internal components such as wires, windings, stators, 

rotors, magnets, contacts, relays, energizers, and connections in an apparatus that generates or transmits 

electrical energy including, but not limited to: alternators, generators, transformers, electric motors, cables, 

and circuit breakers, except for the actual cabinet in which the components are housed. Electrical 

components of graphic arts application equipment and hot-line tools are also included in this category.

“Electronic Components” means the portions of an assembly, including, but not limited to: circuit card 

assemblies, printed wire assemblies, printed circuit boards, soldered joints, ground wires, bus bars, 

magnetic tapes and tape drive mechanisms, discs and disc drive mechanisms, electro-optical devices (e.g., 

optical filters, sensor assemblies, infrared sensors, charged coupled devices, thermal electric coolers, and 

vacuum assemblies), solid state components, semiconductors (e.g., diodes, zeners, stacks, rectifiers, 

integrated microcircuits, transistors, solar cells, light sensing devices, and light-emitting devices), and other 

electrical fixtures, except for the actual cabinet in which the components are housed.

“Emulsion” means a suspension of small droplets of one liquid in a second liquid. 
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September 20, 2010

Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

“Emission Control Device” means a device for reducing emissions of reactive organic compounds or 

toxic air contaminants to the atmosphere.

“Evaporation” means to change into a vapor, normally from a liquid state. 

“Existing Solvent Cleaning Operation” means solvent cleaning that is being performed as of [date of 

revised rule adoption].

“Existing Solvent Cleaning Machine” means any solvent cleaning machine that is installed as of [date of 

revised rule adoption].

“Fluid System” means a power transmission system that uses the force of flowing liquids and gases to 

transmit power. Fluid systems include hydraulic systems and pneumatic systems. 

“Freeboard Area” means; for a batch cleaning machine, the area within the solvent cleaning machine that 

extends from the solvent/air interface to the top of the solvent cleaning machine; for an in-line cleaning 

machine, it is the area within the solvent cleaning machine that extends from the solvent/air interface to the 

bottom of the entrance or exit opening, whichever is lower.

“Freeboard Height” means; for a batch cleaning machine, the distance from the solvent/air interface as 

measured during the idling mode or the top of the solvent drain of a remote reservoir cold cleaning machine 

to the top of the cleaning machine; for an in-line cleaning machine, it is the distance from the solvent/air 

interface to the bottom of the entrance or exit opening, whichever is lower as measured during the idling 

mode. 

“Freeboard Ratio” means the ratio of the solvent cleaning machine freeboard height to the smaller interior 

dimension (length, width, or diameter) of the solvent cleaning machine. 

“Freeboard Refrigeration Device (Also Called a „Chiller‟)” means a secondary cooling coil mounted 

above the primary condenser that provides a chilled air blanket above the solvent vapor air-interface to 

cause the condensation of additional solvent vapor. A primary condenser capable of meeting the 

requirements of Section J.9.a or L.10.a is defined as both a freeboard refrigeration device and a primary 

condenser for the purposes of this rule. 

“Gas-Path Solvent Cleaner” means a solvent cleaning machine (including ancillary equipment) that 

applies solvent to the interior of a gas turbine or jet engine for the removal of corrosion or combustion 

deposits. 

“General Work Surface” means an area of a medical device or pharmaceutical facility where solvent 

cleaning is performed on work surfaces including, but not limited to, tables, countertops, and laboratory 

benches. General work surface shall not include items defined under janitorial cleaning.

“Guillotine Cover” means a cover that is biparting and moves in the same plane.

“Halogenated Hazardous Air Pollutant Solvent” means methylene chloride (Chemical Abstracts Service 

No. 75-09-2), perchloroethylene (Chemical Abstracts Service No. 127-18-4), trichloroethylene (Chemical 

Abstracts Service No. 79-01-6), 1,1,1-trichloroethane (Chemical Abstracts Service No. 71-55-6), carbon 

tetrachloride (Chemical Abstracts Service No. 56-23-5), and chloroform (Chemical Abstracts Service No. 

67-66-3).

“High-Precision Optics” means any optical element used in an electro-optical device that is designed to 

sense, detect, or transmit light energy, including specific wavelengths of light energy and changes in light 

energy levels.

“High Volatility Solvent” means any solvent that is not classified as a low volatility solvent. 
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Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

“Hoist” means a mechanical device that carries the parts basket and the parts to be cleaned from the 

loading area into the solvent cleaning machine and to the unloading area at a controlled speed. A hoist may 

be operated by controls or may be programmed to cycle parts through the cleaning cycle automatically. 

“Idling Mode” means the time period when a solvent cleaning machine is not actively cleaning parts and 

the sump heating coils, if present, are turned on.

“Initial Boiling Point” means the boiling point of a liquid as defined by ASTM D 1078-05, “Standard Test 

Method for Distillation Range of Volatile Organic Liquids,” ASTM International.

“In-Line Cleaning Machine” or “Continuous Cleaning Machine” means any solvent cleaning machine 

that uses an automated parts handling system, typically a conveyor, to automatically provide a continuous 

supply of parts to be cleaned. These units are fully enclosed except for the conveyor inlet and exit portals. 

In-line cleaning machines can be either cold or vapor cleaning machines.

“Lip Exhaust” means a device installed at the top of the opening of a solvent cleaning machine that draws 

in air and solvent vapor from the freeboard area and ducts the air and vapor away from the solvent cleaning 

machine.

“Liquid Leak” means any solvent leak at a rate of more than three drops per minute or any visible liquid 

mist.

“Low Volatility Solvent” means a solvent with an initial boiling point that is greater than 120 degrees 

Celsius (248 degrees Fahrenheit) and with a temperature, as used, at least 100 degrees Celsius (212 degrees 

Fahrenheit) below the initial boiling point.

“Maintenance Cleaning” means a solvent cleaning operation or activity carried out to keep clean general 

work areas where manufacturing or repair activity is performed, to clean tools, machinery, molds, forms, 

jigs, and equipment. This definition does not include the cleaning of adhesive, coating, or ink application 

equipment.

“Manufacturing Process” means the process of making goods or articles by hand or by machinery.

“Medical Device” means an instrument, apparatus, implement, machine, contrivance, implant, in vitro 

reagent or other similar article, including any component, accessory, raw material, partial or completed 

fabricated part, that meets one of the following conditions:

1. It is intended for use in the diagnosis of disease or other conditions, or in the cure, 

mitigation, treatment, or prevention of disease; or

2. It is intended to affect the structure or any function of the body; or

3. It is defined in the National Formulary or the United States Pharmacopeia, or any 

supplement to them.

“Mixer” means any device that mechanically agitates the liquid solvent to enhance the cleaning process. 

“Nonabsorbent Container” means any container made of nonporous material, which does not allow the 

migration of the liquid solvent through it.

“Nonatomized Solvent Flow” means the use of a solvent in the form of a liquid stream without 

atomization.

“Nonleaking Container” means a container without any liquid leaks.

“Open-Top Vapor Cleaning Machine” means a batch solvent cleaning machine that has its upper surface 

open to the air and boils solvent to create solvent vapor used to clean and/or dry parts. 

“Primary Condenser” see “Condenser.”
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Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

“Radiation-Effect Coating” means a material that prevents radar detection.

“Reactive Organic Compound Composite Partial Pressure” means the sum of the partial pressures of 

compounds defined as reactive organic compounds. Reactive organic compound composite pressure shall 

be calculated as follows:

Where: 

 Wi = Weight of the “i”th reactive organic compound, in grams 

 Ww = Weight of water, in grams 

 We = Weight of the “e”th exempt organic compound, in grams 

 MWi = Molecular weight of the “i”th reactive organic compound, in grams per grams-mole 

 MWw = Molecular weight of water, in grams per grams-mole

 MWe = Molecular weight of the “e”th exempt compound, in grams per grams-mole

 PPc = Reactive organic compound composite partial pressure at 20 degrees Celsius, in millimeters of

mercury 

 VPi = Vapor pressure of the “i”th reactive organic compound at 20 degrees Celsius, in millimeters of

mercury

“Refrigerated Freeboard Chiller” see the definition for “Freeboard Refrigeration Device (also called a 

„Chiller‟).”

“Remote Reservoir Cold Cleaning Machine” means any device in which liquid solvent is pumped to a 

sink-like work area that drains solvent back into an enclosed container while parts are being cleaned, 

allowing no solvent to pool in the work area. A remote reservoir cold cleaning machine that uses an 

enclosed container that is accessible for dipping or soaking parts is also considered to be a batch cleaning 

machine. 

“Repair Cleaning” means a solvent cleaning operation or activity carried out during a repair process.

“Repair Process” means the process of returning a damaged object or an object not operating properly to 

good condition.

“Research and Development Activities” means activities conducted at a research or laboratory facility 

whose primary purpose is to conduct research and development into new processes and products, where 

such source is operated under the close supervision of technically trained personnel and is not engaged in 

the manufacture of products for sale or exchange for commercial profit, except in a de minimis manner.

“Rotating Basket” means a perforated or wire mesh cylinder containing parts to be cleaned that is slowly 

rotated while proceeding through the solvent cleaning machine. 

“Scientific Instrument” means an instrument (including the components, assemblies, and subassemblies 

used in their manufacture) and associated accessories and reagents that is used for the detection, 

measurement, analysis, separation, synthesis, or sequencing of various compounds.

“Semiconductor Manufacturing” means any process or operation producing semiconductor material, 

slicing or polishing semiconductor material, utilizing photoresist to manufacture intermediate products, or 

producing either semiconductor devices or related solid state devices. 
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Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

“Silicone Manufacturing” means any process or operation producing a silicone raw material (e.g., 

polymer, fluid, gum, gel, elastomer, dispersion, or other bulk state silicone material). Silicone 

manufacturing also includes any on site preliminary processes or operations that occurs before a silicone 

raw material is produced. 

“Soils” mean contaminants that are removed from the part or parts being cleaned. Soils include, but are 

not limited to, grease, oils, waxes, metal chips, carbon deposits, fluxes, and tars. 

“Solvent” means any liquid containing any reactive organic compound or any toxic air contaminant, which 

is used as a diluent, thinner, dissolver, viscosity reducer, cleaning agent, drying agent, preservative, or other 

similar uses.

“Solvent/Air Interface” means, for a vapor cleaning machine, the location of contact between the 

concentrated solvent vapor layer and the air. This location of contact is defined as the mid-line height of 

the primary condenser coils. For a cold cleaning machine, it is the location of contact between the liquid 

solvent and the air.

“Solvent/Air Interface Area” means; for a vapor cleaning machine, the surface area of the solvent vapor 

zone that is exposed to the air; for an in-line cleaning machine, it is the total surface area of all the sumps; 

for a cold cleaning machine, it is the surface area of the liquid solvent that is exposed to the air, except for 

remote reservoir cleaning machines, in which case it is the area of the drain.

 

“Solvent Cleaning” means any activity, operation, or process (including, but not limited to, surface 

preparation, cleanup, or wipe cleaning) performed outside of a solvent cleaning machine, that uses solvent 

to remove uncured adhesives, uncured coatings, uncured inks, uncured polyester resin material, uncured 

sealant, or other contaminants, including, but not limited to, dirt, soil, oil, lubricants, coolants, moisture, 

fingerprints, and grease, from parts, products, tools, machinery, application equipment, and general work 

areas. Cleaning spray equipment used for the application of coating, adhesive, ink, polyester resin material, 

or sealant is also considered to be solvent cleaning irrespective of the spray material being cured. 

“Solvent Cleaning Machine” means any device or piece of equipment that uses solvent liquid or vapor to 

remove soils, moisture, or other contaminants from the surfaces of materials. Types of solvent cleaning 

machines include, but are not limited to, batch cold, batch vapor, in-line cold, in-line vapor, remote 

reservoir, and gas-path solvent cleaners. Buckets, pails, and beakers with capacities of 3.785 liters (1.00 

gallon) or less are not considered solvent cleaning machines. However, the use of such a container or 

similar containers (e.g., hand-held spray bottles) with a liquid solvent for cleaning is considered to be 

solvent cleaning. Any device or piece of equipment used exclusively for stripping shall not be considered 

to be a solvent cleaning machine.

“Solvent Container” means that part of the solvent cleaning machine that is intended to hold the cleaning 

solvent. 

“Solvent Vapor Zone” means; for a vapor cleaning machine, the area that extends from the liquid solvent 

surface to the level that solvent vapor is condensed. This condensation level is defined as the midline 

height of the primary condenser coils.

“Space Vehicle” means a vehicle designed to travel beyond the earth‟s atmosphere.

“Space Vehicle Component” means any raw material, partial or completed fabricated part, assembly of 

parts, or completed unit of any space vehicle, including mockups and prototypes.

“Spray Pump Control Switch” means a safety switch that prevents the spray pump from operating if the 

vapor level falls below the design operating level. 

“Sump” means the part of a solvent cleaning machine where the liquid solvent is located. 

“Sump Heater Coils” mean the heating system on a cleaning machine that uses steam, electricity, or hot 

water to heat or boil the liquid solvent. 
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Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

“Superheated Vapor System” means a system that heats the solvent vapor, either passively or actively, to 

a temperature above the solvent's initial boiling point. Parts are held in the superheated vapor before 

exiting the machine to evaporate the liquid solvent on them. Hot vapor recycle is an example of a 

superheated vapor system.

“Superheated Vapor Zone” means any region located within the vapor zone of a vapor cleaning machine 

whereby solvent vapors are heated above the solvent‟s initial boiling point.

“Ultrasonics” means enhancement of the cleaning process by agitation of liquid solvents with high 

frequency sound wave vibrations. 

“Vapor Cleaning Machine” means a batch or in-line solvent cleaning machine that boils liquid solvent 

generating solvent vapor that is used as a part of the cleaning or drying cycle.

“Waste Solvent Residue” means sludge that may contain dirt, oil, metal particles, and/or other undesirable 

waste products concentrated after heat distillation of the waste solvent either in the solvent cleaning 

machine itself or after distillation in a separate still. 

“Water Layer” means a layer of water that floats above the denser solvent and provides control of solvent 

emissions. In many cases, the solvent used in batch cold cleaning machines is sold containing the 

appropriate amount of water to create a water cover.

“Workload” means the objects put in a solvent cleaning machine for the purpose of removing oil, grease, 

soil, coating, dirt, moisture, or other undesirable matter from the surface of the objects. 

“Workload Area” means:

(1) The plane geometric surface area of the top of the submerged parts basket, or

(2) The combined plane geometric surface area(s) displaced by the submerged workload, if 

no basket is used.

D. General Operating Requirements. Any person who owns, operates, or uses any solvent cleaning 

machine or performs any solvent cleaning shall ensure such operation conforms to the following 

requirements:

1. All solvent, including waste solvent and waste solvent residue, and waste solvent cleaning 

materials such as cloth, paper, etc. shall be stored or disposed of in nonabsorbent and nonleaking 

containers equipped with tight-fitting covers. The covers shall be in place unless adding material 

to or removing material from the containers, the containers are empty, or doing 

maintenance/inspection of the containers. After distillation recovery of waste solvent, solvent 

residues shall not contain more than 20 percent of reactive organic compound by weight. 

2. The solvent cleaning machine, ventilation system, and/or emission control equipment shall be 

installed, operated, and maintained consistent with the manufacturer‟s specifications. 

3. The cleaning of porous or absorbent materials, such as cloth, leather, wood, or rope, is prohibited. 

This provision shall not apply to paper gaskets, paper filters, and medical devices.

4. All containers holding solvent shall be free of liquid leaks. Solvent cleaning machine equipment, 

such as covers, pumps, water separators, steam traps, or distillation units shall not have any liquid 

leaks, visible tears, holes, or cracks. Any such liquid leak, visible tear, hole, or crack that is 

detected shall be repaired within one day from discovery, or the solvent cleaning machine shall be 

drained of all solvent, consistent with Section D.12 provisions, and shut down until replaced or 

repaired. Solvent cleaning machines shall not be operated when leaking. 

5. Covers and other closure devices (e.g., valves or drain plugs) designed to reduce solvent

evaporation shall not be removed or opened except to process work or to perform monitoring, 
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September 20, 2010

Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

inspections, maintenance, or repairs that require the removal of the covers or other closure 

devices. Solvent cleaning machines shall not be operated when performing maintenance or 

repairs. 

6. For solvent cleaning machine operations other than gas-path solvent cleaners and continuous web 

cleaning machines, solvent carry-out shall be minimized by the following methods, as applicable:

a. Except for remote reservoir cold cleaning machines, the workload shall be racked. 

b. Parts having cavities, holes, or blind holes shall be tipped or rotated before being 

removed from the solvent cleaning machine such that the solvent in the cavities, holes, or 

blind holes is returned to the solvent container.

c. The workload shall be drained within the freeboard area so that the drained solvent is 

returned to the solvent container. 

d. For cold solvent cleaning, parts shall be drained immediately after cleaning, until one of 

the following conditions exists:

1) At least 15 seconds have elapsed; or

2) Dripping of solvent ceases; or

3) The parts become visibly dry.

e. For automated parts handling systems, the workload shall be moved in and out of the 

solvent cleaning machine at less than 3.4 meters per minute (11.2 feet per minute). 

7. For solvent cleaning machine operations other than gas-path solvent cleaners and continuous web 

cleaning machines, solvent flow shall be directed downward to avoid turbulence at the solvent/air 

interface and to prevent liquid solvent from splashing outside of the solvent cleaning machine. If 

a flexible hose or flushing device is used, flushing shall be performed only within the freeboard 

area of the solvent cleaning machine.

8. For solvent cleaning machine operations other than gas-path solvent cleaners and continuous web 

cleaning machines, solvent flow shall not be used in a manner such that liquid solvent splashes 

outside the container. 

9. Solvent shall not be atomized unless it is vented to an emission control system that meets the 

requirements of Section N.

10. Any solvent spills shall be wiped up immediately and the used absorbent material (e.g., cloth, 

paper, sand, sawdust, etc.) shall be stored in closed containers that are handled in accordance with 

Section D.1.

11. Solvent levels shall not exceed the solvent cleaning machine‟s fill line.

12. Draining or filling solvent containers shall be performed at a level lower than the liquid solvent 

surface.

13. When using a ventilation fan, it shall not be positioned in such a way as to direct air flow near a 

solvent cleaning machine opening. 

E. Additional Operating Requirements for Batch Vapor Cleaning Machines and In-Line Vapor 

Cleaning Machines. Any person who owns, operates, or uses any batch vapor cleaning machine or any inline vapor cleaning machine shall ensure the equipment operation conforms to the following requirements:
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September 20, 2010

Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

1. Except to perform monitoring, inspections, maintenance, or repairs that require the removal of the 

covers:

a. Idling mode covers shall be closed or in place when the equipment is in an idling mode. 

b. Downtime mode covers shall be closed or in place when the equipment is in a downtime 

mode. 

2. When starting the solvent cleaning machine, the primary condenser shall be turned on before the 

sump heater. 

3. When shutting down the solvent cleaning machine, the sump heater shall be turned off and the 

solvent vapor layer allowed to collapse before the primary condenser is turned off. 

4. The workload shall be cleaned in the vapor zone for at least 30 seconds or until condensation 

ceases. 

5. Parts shall be allowed to dry within the solvent cleaning machine until the exterior surface of the 

parts become visually dry. 

6. Solvent spray shall be kept at least 10 centimeters (3.94 inches) below the solvent/air interface. 

7. The workload area shall not occupy more than half of the solvent/air interface area of the solvent 

cleaning machine. 

8. For solvent cleaning machines equipped with water separators, water shall not be visibly 

detectable in the solvent phase exiting the water separator, nor shall solvent be visibly detectable 

in the aqueous phase leaving the separator. 

9. If equipped with a superheated vapor zone:

a. The manufacturer's specifications for determining the minimum proper dwell time within 

the superheated vapor system shall be followed. 

b. Parts and parts baskets shall remain in the vapor zone for at least the minimum proper 

dwell time. 

c. The temperature within the superheated vapor zone shall be at least 10 degrees 

Fahrenheit above the initial boiling point of the solvent being used.

F. Additional Operating Requirements for Gas-Path Solvent Cleaners. Any person who owns, operates, 

or uses any gas-path solvent cleaner shall ensure the equipment operation conforms to the following 

requirements:

1. Cleaned parts or equipment shall be drained until dripping ceases or 15 seconds have elapsed.

2. The cover of the solvent container(s), reservoir(s) and opening(s) of a solvent collection system 

shall be closed at all times except to process work or to perform monitoring, inspections, 

maintenance, or repairs that require the removal of the covers or other closure devices.

G. General Equipment Requirements for Solvent Cleaning Machines. Any person who owns, operates, or 

uses any solvent cleaning machine shall ensure that it is equipped with the following:

1. A container for the solvent. 

2. Except for remote reservoir cold cleaning machines using low volatility solvents, an apparatus or 

cover(s) to completely cover the solvent container when not processing work. 
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Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

3. Except for gas-path solvent cleaners using a solvent with a reactive organic compound content of 

50 grams per liter of material or less, an apparatus or a device for draining cleaned parts such that 

the drained solvent or drag-out is returned to the solvent container. 

4. A list of the applicable operating requirements. At a minimum, the list shall include the applicable 

operating requirements contained in Sections D, E, and F. The list of operating requirements shall 

be legible and conspicuously posted or maintained on or near the equipment in such a manner that 

it is conveniently available to the operator for reference purposes. 

5. Where solvent agitation is used, equipment that achieves agitation by use of pump recirculation, 

mechanical mixing (a mixer), or ultrasonics. Gas or air agitation shall not be used. When a pumpagitated solvent bath is used, the pump agitator shall be designed to produce a rolling motion of 

the solvent without any observable splashing against tank walls or parts being cleaned.

6. When employing solvent flow, a flexible hose or flushing device that produces only a continuous 

fluid stream. An atomized or shower type spray shall not be used unless it is used in an in-line or 

enclosed solvent cleaning machine where the spray is conducted in a totally confined space that is 

sealed from the atmosphere. 

7. Where a hood, enclosure, lip exhaust, or a lip exhaust connected to a hood or enclosure is 

employed, a blower or fan such that the air ventilation rate shall not exceed 20 cubic meters per 

minute per square meter (65.6 cubic feet per minute per square feet) of solvent/air interface area, 

unless necessary to meet a National Institute for Occupational Safety and Health standard. 

8. When a lip exhaust is installed or added after July 17, 1997, an emission control system that meets 

the requirements of Section N. 

9. A workroom having an average draft rate, as measured parallel to the plane of the solvent cleaning 

machine opening, not exceeding 9.1 meters per minute (30 feet per minute), unless necessary to 

meet a National Institute for Occupational Safety and Health standard.

10. When employing an automated parts handling system, equipment such that the speed of the parts 

shall not exceed 3.4 meters per minute (11.2 feet per minute).

H. Additional Equipment Requirements for Remote Reservoir Cold Cleaning Machines. Any person 

who owns, operates, or uses any remote reservoir cold cleaning machine shall ensure that it is equipped 

with the following:

1. A sink or work area that is sloped sufficiently towards the drain to prevent pooling of solvent.

2. A single drain hole, not larger than 100 square centimeters (15.5 square inches) in area, for the 

solvent to flow from the sink into the enclosed reservoir. 

3. Except when using low volatility solvents, a cover or a device, such as a valve or a drain plug, to 

prevent or minimize solvent vapor emissions from the solvent container when not processing 

work or performing monitoring, inspections, maintenance, or repairs that require the removal of 

the cover or device. 

4. A freeboard height of 6 inches or higher. 

5. When the solvent is heated above 50 degrees Celsius (122 degrees Fahrenheit), or it is agitated, or 

the solvent is a high volatility solvent, dimensions such that the freeboard ratio is 0.75 or greater.

6. In lieu of the freeboard height required by Section H.4 or the freeboard ratio required by Section 

H.5, one of the following requirements may be met:

a. A water layer at a minimum thickness of 2.5 centimeters (1.0 inch) on the surface of the 

solvent within the cleaning machine shall be used, or
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Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

b. An emission control system that meets the requirements of Section N shall be used.

7. Effective [one year from the date of revised rule adoption], except when using an emission control 

system that meets the requirements of Section N, solvent that contains 50 grams of reactive 

organic compound per liter of material or less.

I. Additional Equipment Requirements for Batch Cold Cleaning Machines. Any person who owns, 

operates, or uses any batch cold cleaning machine other than a remote reservoir cold cleaning machine shall 

ensure that it is equipped with the following:

1. When using a high volatility solvent, a cover that is a sliding, rolling, or guillotine type that is 

designed to easily open and close. If a mechanized batch cold cleaning machine (e.g., a manually 

loaded or semi-continuously loaded Ferris wheel or cross-rod solvent cleaning machine) is used 

with a high volatility solvent, the unit shall be equipped with a downtime mode cover.

2. If using a high volatility solvent, the drainage apparatus or device required by Section G.3 shall be 

internal so that the cleaned parts are within the solvent cleaning machine and under the cover 

while draining. The drainage apparatus or device may be external where the internal type cannot 

fit into the cleaning system provided the drained solvent is returned to the solvent container. 

3. When using a low volatility solvent that is not agitated, a freeboard height of 6 inches or higher or 

dimensions such that the freeboard ratio is 0.5 or greater. 

4. When the solvent is heated above 50 degrees Celsius (122 degrees Fahrenheit), or it is agitated, or 

the solvent is a high volatility solvent, dimensions such that the freeboard ratio is 0.75 or greater.

5. In lieu of the freeboard height or freeboard ratio required by Section I.3 or the freeboard ratio 

required by Section I.4, one of the following requirements may be met:

a. A water layer at a minimum thickness of 2.5 centimeters (1.0 inch) on the surface of the 

solvent within the cleaning machine shall be used, or 

b. An emission control system shall be used that meets the requirements of Section N shall 

be used.

6. A conspicuous mark denoting the maximum allowable solvent level conforming to the applicable 

freeboard requirements. This requirement does not apply if employing a water layer or an 

emission control system per Section I.5.

7. Effective [one year from the date of revised rule adoption], except when using an emission control 

system that meets the requirements of Section N, solvent that contains 50 grams of reactive 

organic compound per liter of material or less.

J. Additional Equipment Requirements for Batch Vapor Cleaning Machines. Any person who owns, 

operates, or uses any batch vapor cleaning machine shall ensure that it is equipped with the following:

1. For open-top vapor cleaning machines, a cover that is a sliding, rolling, or guillotine type that is 

designed to easily open and close without disturbing the vapor zone. This requirement does not 

apply to open-top vapor cleaning machines equipped with top enclosures, provided:

a. the operator only opens the enclosure cover(s) or door(s) when the condenser is operative 

or when the solvent cleaning machine is shut down, and

b. the solvent cleaning machine solvent/air interface area is less than 1 square meter (10.8 

square feet), and
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Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

c. the solvent cleaning machine cover is designed such that it can be opened and closed 

easily without disturbing the vapor zone.

2. For mechanized batch vapor cleaning machines (e.g., a manually-loaded or semi-continuouslyloaded Ferris wheel or cross-rod solvent cleaning machine), idling and downtime mode covers.

3. A primary condenser situated above the boiling solvent. 

4. A condenser flow switch that automatically shuts off the sump heater if the condenser coolant 

stops circulating or becomes warmer than its designed operating temperature. 

5. A vapor level control device that automatically shuts off the sump heater if the vapor level in the 

vapor cleaning machine rises above the height of the primary condenser.

6. For solvent cleaning machines with solvent flow, a device such as a spray pump control switch 

that prevents the solvent flow pump operation unless the solvent vapor level is at the designed 

operating level.

7. A device that automatically shuts off the sump heat if the sump liquid solvent level drops to the 

sump heater coils. 

8. Dimensions such that the freeboard ratio is 0.75 or greater. Effective [one year from the date of 

revised rule adoption], the unit shall have dimensions such that the freeboard ratio is 1.0 or 

greater.

 

9. For solvent cleaning machines with a solvent/air interface area of 1 square meter (10.8 square feet) 

or greater:

a. A freeboard refrigeration device for which the chilled air blanket temperature (expressed 

in degrees Fahrenheit) at the coldest point on the vertical axis in the center of the air 

blanket shall be no greater than 30 percent of the initial boiling point (expressed in 

degrees Fahrenheit) of the solvent used or no greater than 40 degrees Fahrenheit. If the 

chiller operates below 32 degrees Fahrenheit, it shall be equipped with an automatic 

defrost; or

b. An enclosed design in which the cover or door opens only when the dry part is actually 

entering or exiting the solvent cleaning machine.

10. In lieu of the freeboard ratio required by Section J.8 or the freeboard chiller/enclosed design 

required by Section J.9, an emission control system that meets the requirements of Section N may 

be used. 

11. Effective [one year from the date of revised rule adoption], except when an emission control 

system that meets the requirements of Section N is employed, when using solvent containing in 

excess of 50 grams of reactive organic compound per liter of material:

a. An automated parts handling system;

b. A circumferential trough;

c. A water separator (not required for solvents that form azeotropes with water); 

d. A freeboard refrigeration device that is operated such that the chilled air blanket 

temperature, measured at the center of the air blanket, is no greater than 40 percent of the 

initial boiling point of the solvent, in degrees Fahrenheit, for solvents that do not form 

azeotropes with water, or 50 percent of the initial boiling point, in degrees Fahrenheit, for 

solvents that form azeotropes with water; and
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Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

e. A superheated vapor zone where parts remain in the vapor zone for at least the minimum 

dwell time, as specified by the manufacturer. The temperature within the superheated 

vapor zone shall be at least 10 degrees Fahrenheit above the initial boiling point of the 

solvent being used.

K. Additional Equipment Requirements for In-Line Cold Cleaning Machines. Any person who owns, 

operates, or uses any batch in-line cold cleaning machine shall ensure that it is equipped with the following:

1. A rotating basket, tumbling basket, drying tunnel, or other means that prevents cleaned parts from 

carrying out solvent liquid or vapor. 

2. Openings such that the average clearance between workload material and the edges of the solvent 

cleaning machine entrance and exit openings shall be less than 10 centimeters (3.94 inches) or less 

than 10 percent of the opening width, whichever is less. 

3. Downtime mode covers. A continuous web part that completely occupies an entry and exit port 

when the machine is idle is considered to meet this requirement. 

4. Dimensions such that the freeboard ratio is 0.75 or greater. 

 

5. In lieu of the freeboard ratio required by Section K.4, an emission control system that meets the 

requirements of Section N may be used. 

6. Effective [one year from the date of revised rule adoption], except when using an emission control 

system that meets the requirements of Section N, solvent that contains 50 grams of reactive 

organic compound per liter of material or less.

L. Additional Equipment Requirements for In-Line Vapor Cleaning Machines. Any person who owns, 

operates, or uses any in-line vapor cleaning machine shall ensure that it is equipped with the following:

1. A rotating basket, tumbling basket, drying tunnel, or other means that prevents cleaned parts from 

carrying out solvent liquid or vapor. 

2. Openings such that the average clearance between workload material and the edges of the solvent 

cleaning machine entrance and exit openings shall be less than 10 centimeters (3.94 inches) or less 

than 10 percent of the opening width, whichever is less. 

3. Idling and downtime mode covers. A continuous web part that completely occupies an entry and 

exit port when the machine is idle is considered to meet this requirement. 

4. A primary condenser situated above the boiling solvent. 

5. A condenser flow switch that automatically shuts off the sump heater if the condenser coolant 

stops circulating or becomes warmer than its designed operating temperature.

6. A vapor level control device that automatically shuts off the sump heater if the vapor level in the 

vapor cleaning machine rises above the height of the primary condenser. 

7. For solvent cleaning machines with solvent flow, a device such as a spray pump control switch 

that prevents the solvent flow pump operation unless the solvent vapor level is at the designed 

operating level.

8. A device that automatically shuts off the sump heat if the sump liquid solvent level drops to the 

sump heater coils. 

9. Dimensions such that the freeboard ratio is 0.75 or greater. Effective [one year from the date of 

revised rule adoption], the unit shall have dimensions such that the freeboard ratio is 1.0 or 

greater.
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Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

10. In lieu of the freeboard ratio required by Section L.9, one of the following may be met:

a. A freeboard refrigeration device for which the chilled air blanket temperature (expressed 

in degrees Fahrenheit) at the coldest point on the vertical axis in the center of the air 

blanket shall be no greater than 30 percent of the initial boiling point (expressed in 

degrees Fahrenheit) of the solvent used or no greater than 40 degrees Fahrenheit. If the 

chiller operates below 32 degrees Fahrenheit, it shall be equipped with an automatic 

defrost; or

b. An emission control system that meets the requirements of Section N shall be used. 

 

11. Effective [one year from the date of revised rule adoption], except when an emission control 

system that meets the requirements of Section N is employed, when using solvent containing in 

excess of 50 grams of reactive organic compound per liter of material:

a. A circumferential trough; 

b. A water separator (not required for solvents that form azeotropes with water);

c. A freeboard refrigeration device that is operated such that the chilled air blanket 

temperature, measured at the center of the air blanket, is no greater than 40 percent of the 

initial boiling point of the solvent, in degrees Fahrenheit, for solvents that do not form 

azeotropes with water, or 50 percent of the initial boiling point, in degrees Fahrenheit, for 

solvents that form azeotropes with water; and

d. A superheated vapor zone where parts remain in the vapor zone for at least the minimum 

dwell time, as specified by the manufacturer. The temperature within the superheated 

vapor zone shall be at least 10 degrees Fahrenheit above the initial boiling point of the 

solvent being used.

M. Requirements - Solvent Cleaning.

Section M requirements apply to any person performing solvent cleaning, including, but not limited to, use 

of wipe cleaning cloths, cotton swabs, dabber bottles, hand-held spray bottles, squirt bottles, aerosol 

products, and the cleaning of application equipment. The following requirements become effective [one 

year from the date of revised rule adoption] and are in addition to the general operating requirements 

specified in Section D.

1. Solvent Requirements. Except when using an emission control system that meets the 

requirements of Section N, no person shall use any solvent to perform solvent cleaning which 

exceeds the applicable grams of reactive organic compound per liter of material limit specified in 

Table 1. 

Table 1: Reactive Organic Compound Content Limits for Solvent Cleaning

SOLVENT CLEANING ACTIVITY

ROC Limit, 

grams of ROC per liter of 

material 

(pounds of ROC per gallona)

(a) Product Cleaning During Manufacturing Processes and Surface Preparation for Coating 

Application:

 (i) General 50

(0.42)

 

a English units are provided for information only.
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Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

SOLVENT CLEANING ACTIVITY

ROC Limit, 

grams of ROC per liter of 

material 

(pounds of ROC per gallona)

(ii) Electrical Apparatus Components & Electronic 

Components

900

(7.51)

(iii) Medical Devices & Pharmaceuticals 900

(7.51)

(iv) Silicone Manufacturing 900

(7.51)

(b) Repair Cleaning and Maintenance Cleaning:

 (i) General 50

(0.42)

(ii) Electrical Apparatus Components & Electronic 

Components

900

(7.51)

(iii) Medical Devices & Pharmaceuticals:

(I) Tools, Equipment, & Machinery 900

(7.51)

(II) General Work Surfaces 900

(7.51)

(iv) Silicone Manufacturing 900

(7.51)

(c) Cleaning of Coatings Application Equipment 950

(7.93)

(d) Cleaning of the Following Items and Equipment and their 

Components:

 (i) Aerospace Vehicles; 

(ii) Aerospace Vehicle Payloads and Satellites; 

(iii) Aerospace Vehicle, Aerospace Vehicle Payload, and 

Satellite: 

(I) Transport Equipment (e.g., railcars, trucks, 

trailers, forklifts, and containers), and 

(II) Support Processing Equipment (e.g., clean rooms, 

tools, payload fairing fixtures, alignment jigs, fuel 

and oxidizer loading carts and associated transfer 

lines).

900

(7.51)

2. Cleaning Devices and Methods. Except for solvent cleaning of spray application equipment, any 

person performing solvent cleaning with a solvent containing more than 50 grams per liter of 

material shall use one or more of the following cleaning devices or methods:

a. Wipe cleaning where solvent is dispensed to wipe cleaning materials from containers that 

are kept closed to prevent evaporation, except while dispensing solvent or replenishing 

the solvent supply; 

b. Application of solvent from hand-held spray bottles, squirt bottles, or other closed 

containers with a capacity of one liter or less; or 

c. Non-atomized solvent flow, dip, or flush method where pooling on surfaces being 

cleaned is prevented or drained, and all solvent runoff is collected in a manner that 

enables solvent recovery or disposal. The collection system shall be kept closed to 
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September 20, 2010

Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

prevent evaporation except while collecting solvent runoff or emptying the collection 

system.

3. Solvent Cleaning of Spray Application Equipment. Any person cleaning spray application 

equipment with a solvent containing more than 50 grams of reactive organic compound per liter of 

material shall use an enclosed system, or equipment that is proven to the satisfaction of the 

Control Officer to be equally effective as an enclosed system at controlling emissions. If an 

enclosed system is used, it shall totally enclose spray guns, cups, nozzles, bowls, and other parts 

during washing, rinsing and draining procedures, and it shall be used according to the 

manufacturer‟s recommendations and be closed when not in use. 

N. Emission Control System Requirements. Any person who owns, operates, or uses any emission control 

system required by Sections D.9, G.8, or T.2.b.4) or as an alternative compliance method as provided for in 

this rule shall ensure that the following requirements are met:

1. The overall efficiency (the capture system efficiency multiplied by the emission control device 

efficiency) of the total system shall not be less than 85 percent by weight in reducing total reactive 

organic compound and toxic air contaminant emissions. 

2. When using a carbon adsorber, the system exhaust shall be no more than 25 parts per million of 

reactive organic compound by volume, calculated as carbon, over a complete adsorption cycle, 

3. The emission collection system shall have a ventilation rate between 15 to 20 cubic meters per 

minute per square meter of solvent/air interface area (49.2 to 65.6 cubic feet per minute per square 

feet of solvent air interface area), unless otherwise required to meet a National Institute for 

Occupational Safety and Health standard.

4. An application for installation of the emission control equipment is submitted and the Control 

Officer grants an Authority to Construct for the equipment.

5. An initial source test is accomplished by [one year from the date of revised rule adoption] or a 

later deadline established in an Authority to Construct to demonstrate compliance with the overall 

efficiency of the total system and/or the 25 parts per million reactive organic compound by 

volume limits of this rule.

6. Compliance through the use of an emission control system will not result in reactive organic 

compound emissions in excess of the reactive organic compound emissions which would result 

from compliance with Sections H.7, I.7, K.6, or M.1.

O. Alternative Operating and Equipment Requirements for an Airless Solvent Cleaning Machine or an 

Air-Tight Solvent Cleaning Machine. In lieu of meeting the requirements of Sections E through L, any 

person may use an airless solvent cleaning machine or air-tight solvent cleaning machine provided all of 

the following requirements are met:

1. The equipment is operated in accordance with the manufacturer‟s specifications and operated with 

a door or other pressure sealing apparatus that is in place during all cleaning and drying cycles.

2. No pressure relief device shall allow liquid solvent to drain out. 

3. A differential pressure gauge shall be installed to indicate the sealed chamber pressure.

4. A list of operating requirements shall be legible and conspicuously posted or maintained on or 

near the equipment in such a manner that it is conveniently available to the operator for reference 

purposes.

P. Test Methods.
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September 20, 2010

Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

Any person who owns, operates, or uses any solvent cleaning machine or performs any solvent cleaning 

shall comply with the following test methods:

1. The reactive organic compound content of solvents shall be measured by the Environmental 

Protection Agency Reference Method 24 (40 CFR, Part 60, Appendix A-7). 

2. The initial boiling point of solvents shall be determined by ASTM D 1078-05, "Standard Test 

Method for Distillation Range of Volatile Organic Liquids," ASTM International. 

3. The capture system efficiency shall be determined in accordance with the Environmental 

Protection Agency method described in 40 CFR, §52.741(a)(4)(iii) when the emission control 

system is used for reducing emissions of reactive organic compounds. For emission control 

systems handling compounds that are toxic air contaminants but not reactive organic compounds, 

the capture system efficiency shall be determined by using the same aforementioned method 

modified in a manner approved by the Control Officer to quantify the mass of liquid or gaseous 

reactive organic compounds and/or toxic air contaminants. 

4. The emission control device efficiency shall be determined pursuant to the Environmental 

Protection Agency method described in 40 CFR, §52.741(a)(4)(iv) and 40 CFR, §52.741(a)(4)(vi), 

when the emission control system is used for reducing emissions of reactive organic compounds. 

For emission control systems handling any compound that is a toxic air contaminant but not a 

reactive organic compound, the emission control device efficiency shall be determined using: 

a. an Environmental Protection Agency approved test method or methods, or

b. in the case where there is no Environmental Protection Agency approved test method, a 

Control Officer approved detection method applicable for each target toxics specie.

c. Several Environmental Protection Agency and/or Control Officer approved test methods 

on the emission control device efficiency may need to be employed to demonstrate that 

the emission control system overall efficiency is at least 85 percent by weight in reducing 

emissions of reactive organic compounds and/or toxic air contaminants. In addition, 

techniques to convert “parts per million by volume” test method results to 1) “parts per 

million by weight” and/or 2) “mass emission rates” (e.g., pounds per hour) shall be 

approved by the Control Officer. 

5. The volumetric flowrate shall be determined in accordance with the Environmental Protection 

Agency Methods 2, 2A, 2C, 2D, 2F, or 2G (40 CFR, Part 60, Appendix A-1). 

6. The average workroom draft rate shall be measured parallel to the plane of the solvent cleaning 

machine opening with a thermistor anemometer with an accuracy within ± 2 feet per minute and a 

calibration pursuant to the National Institute of Standards and Technology. 

7. The identity of components in solvents shall be determined using manufacturer‟s formulation data 

or by using ASTM E 168-06, “Standard Practices for General Techniques of Infrared Quantitative 

Analysis,” ASTM International, ASTM E 169-04, “Standard Practices for General Techniques of 

Ultraviolet-Visible Quantitative Analysis,” ASTM International, or ASTM E 260-96 (2006), 

“Standard Practice for Packed Column Gas Chromatography,” ASTM International.

8. Emissions of reactive organic compounds from the exhaust of an emission control system shall be 

measured by the Environmental Protection Agency Method 18 (40 CFR, Part 60, Appendix A-7), 

with gas chromatography-flame ionization detection speciation analysis for C1, C2, C3, C4, C5, 

C6+ species. Alternatively, the Environmental Protection Agency Method 25 or 25A in 

combination with Method 18 may be used.

Q. Operation and Maintenance Plan. Any person proposing to use an emission control device to comply 

with this rule pursuant to Section N shall submit, with the Authority to Construct application, an emission 
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Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

control device Operation and Maintenance Plan to the Control Officer for approval. The Operation and 

Maintenance Plan shall specify:

1. operation and maintenance procedures of emissions-producing operation, and 

2. which records shall be kept to document these operation and maintenance procedures. 

3. In addition, these records shall comply with the requirements of Section R.1.c and R.3. The 

Operation and Maintenance Plan shall be implemented upon approval of the Control Officer.

R. Recordkeeping Requirements.

1. Any person who owns, operates, or uses a solvent cleaning machine or performs solvent cleaning 

that is subject to this rule shall comply with the following requirements: 

a. Record and maintain the following information:

1) Brand name, stock identification number, and generic product class for each 

solvent used during the month at the stationary source.

2) Material safety data sheets for each material listed in response to Section 

R.1.a.1).

3) Purchase records for each material listed in response to Section R.1.a.1).

b. Record the following information for the stationary source:

1) On a monthly basis, the total monthly volume (gallons) usage and reactive 

organic compound content (grams per liter or pounds per gallon of reactive 

organic compound) for each material listed in response to Section R.1.a.1). 

2) Records confirming compliance with the acceptable disposal methods listed in 

Section D.1, each time waste solvent or waste solvent residue is removed from 

the stationary source for disposal.

3) For solvent cleaning, the type of cleaning activity for each solvent used at the 

stationary source in accordance with the cleaning categories specified in Table 1 

of this rule.

4) For each solvent cleaning machine:

i. Type of solvent cleaning machine.

ii. Brand name of each solvent used in the solvent cleaning machine and 

the reactive organic compound content of each solvent, as used.

iii. The solvent(s) initial boiling point.

5) When the solvent used is a mixture of different materials that are blended by the 

operator, the mix ratio of the batch shall be recorded and the reactive organic 

compound content of the batch shall be calculated and recorded in order to 

determine compliance with the specified limits of reactive organic compound 

content, as applied.

c. If using an emission control system pursuant to Section N as a means of complying with 

this rule, the person shall maintain such records as required by the Operation and 

Maintenance Plan in Section Q on a daily basis. Key operating parameters and other 

information necessary to verify compliance with the required overall efficiency of the 
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Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

total system, as specified in Section N.1, shall be recorded. These parameters shall 

include, but not be limited to:

1) Hours of operation;

2) All maintenance work that requires the emission control system to be shut down;

3) All information needed to demonstrate continuous compliance with Section N, 

such as temperatures, pressures, and/or flow rates.

2. In addition to the records required by Section R.1, any person claiming the Section B.9 exemption 

or the Section B.15 exemption, shall maintain records in order to demonstrate compliance with the 

solvent usage rate aggregate limits. For Section B.9 exemption claims, daily records on a facility 

basis shall be maintained. For Section B.15 exemption claims, monthly and calendar year total 

records on a stationary source basis shall be maintained.

3. Maintain the records kept pursuant to this rule on site for at least 3 years. Thereafter, maintain 

such records either on site or readily available for expeditious inspection and review for an 

additional 2 years. 

S. Reporting Requirements

Any person holding a permit for a solvent cleaning machine or solvent cleaning subject to the requirements 

of this rule shall submit an annual report to the District. At a minimum, the annual report shall contain the 

monthly records required by Section R.1.b.1), the annual totals based on each of the solvent‟s monthly data, 

the name and address of the Permittee, and the Permit to Operate number that the solvent cleaning machine 

and/or solvent cleaning is subject to. The report shall be due March 1 for the previous calendar year.

T. Compliance Schedule

Any person who owns, operates, or uses any solvent cleaning machine or performs any solvent cleaning 

subject to this rule shall meet the following compliance schedule:

1. New solvent cleaning machines and solvent cleaning operations:

Commencing [date of revised rule adoption], any new solvent cleaning machine shall comply with 

this rule the first time it is operated in the District. Also commencing [date of revised rule 

adoption], any new solvent cleaning shall comply with this rule the first time it is performed in the 

District. 

2. Existing solvent cleaning machines:

a. For any solvent cleaning machine previously subject to the Rule 321 adopted on 

September 18, 1997, commencing [date of revised rule adoption], the owner or operator 

shall ensure that the equipment complies with the applicable provisions of Rule 321. The 

provisions in Sections H.7, I.7, J.8, J.11, K.6, L.9, and L.11 have an effective date of [one 

year from the date of revised rule adoption].

b. For any solvent cleaning machine previously exempt from the September 18, 1997 

amended Rule 321 that lost its exemption by the adoption of amended Rules 102 

(Definitions), 202 (Exemptions to Rule 201), and/or Rule 321 on [date of revised rule 

adoption], the owner or operator of such equipment shall comply with the following:

1) By [30 days from the date of revised rule adoption], be in full compliance with 

the applicable operating requirements of Sections D, E, and F.

2) By [180 days from the date of revised rule adoption], be in full compliance with 

the applicable recordkeeping and reporting provisions of Sections R and S.
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Santa Barbara County APCD - PAR 321 [date of amended rule adoption]

3) By [365 days from the date of revised rule adoption], be in full compliance with 

the applicable equipment requirements of Sections G, H, I, J, K, L, and N.

4) Any lip exhaust installed after [date of revised rule adoption] shall be vented to 

an emission control system that meets the requirements of Section N at the time 

of installation, notwithstanding the date in Sections G.8 and T.2.b.3. 

3. Existing solvent cleaning operations:

The owner or operator of any facility performing solvent cleaning as of [date of revised rule 

adoption] and subject to the requirements of this rule shall comply with the following:

a. By [30 days from the date of revised rule adoption], be in full compliance with the 

applicable operating requirements of Section D.

b. By [180 days from the date of revised rule adoption], be in full compliance with the

applicable recordkeeping and reporting provisions of Sections R and S.

c. By [365 days from the date of revised rule adoption], be in full compliance with the 

solvent cleaning requirements of Rule Section M. 

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