1469.1 - 1

(Adopted March 4, 2005)

RULE 1469.1. SPRAYING OPERATIONS USING COATINGS 

CONTAINING CHROMIUM

(a) Purpose

The purpose of this rule is to reduce hexavalent chromium from spray coating 

operations.

(b) Applicability

This rule shall apply to any operation in which coatings containing hexavalent

chromium are sprayed, with the exception of thermal spraying operations. 

Compliance with this rule shall be in addition to other applicable rules.

(c) Definitions

For the purpose of this rule the following definitions shall apply:

(1) APPROVED HEALTH RISK ASSESSMENT means a health risk 

assessment prepared pursuant to Rule 1402 that is approved by the 

Executive Officer.

(2) CAPTURE EFFICIENCY is the percentage of the mass of the solids 

fraction of overspray that is collected and directed to an air pollution 

control device.

(3) CHROMATE is any salt or ester of chromic acid. For the purpose of this 

rule, chromate means strontium chromate, zinc chromate, lead chromate, 

barium chromate, calcium chromate, and any other chromate used in 

primers or coatings for corrosion protection or other properties.

(4) COATING is a material which is applied to a surface and which forms a 

film in order to beautify and/or protect such surface.

(5) COATING APPLICATION EQUIPMENT are those used for applying 

coating to a substrate. Coating application equipment includes coating 

distribution lines, coating hoses, pressure-pots, spray guns, and handapplication equipment, such as hand-rollers, brushes, daubers, spatulas, 

and trowels.

(6) COMPLIANCE PLAN APPROVAL LETTER is the official notice of 

approval for a Compliance Plan.
Rule 1469.1 (Cont.) (Adopted March 4, 2005)

1469.1 - 2

(7) CONTROL EFFICIENCY is the difference between the uncontrolled and 

the controlled total emissions divided by the total emissions and multiplied 

by 100. Control efficiency is represented by the following equation:

Where   Control Efficiency.

Tu = Uncontrolled Emissions of Hexavalent Chromium

Tc = Controlled Emissions of Hexavalent Chromium

(8) ELECTROSTATIC APPLICATION is charging of atomized paint 

droplets for deposition by electrostatic attraction.

(9) EQUIPMENT includes the spray gun or other application device, the 

booth, enclosure or other area in which the spraying process occurs, and 

the associated air pollution control equipment.

(10) EXHAUST COVERING means a material placed in front of existing 

filters and pre-filters, that is located on the inside of a spray enclosure and 

that is not part of the designed filter system.

(11) EXISTING AIR POLLUTION CONTROLS means all control equipment 

existing as of March 4, 2005.

(12) EXISTING SCHOOL means any school, public or private, kindergarten 

through grade 12, existing as of March 4, 2005.

(13) EXISTING SOURCE or SOURCE means any process where spraying 

primers or coatings containing chromium that is operating on or before 

March 4, 2005.

(14) FACILITY means any source or group of sources or other air 

contaminant-emitting activities which are located on one or more 

contiguous properties within the District, in actual physical contact or 

separated solely by a public roadway or other public right-of-way, and are 

owned or operated by the same person (or persons under common 

control), or an outer continental shelf as determined in 40 CFR Section 

55.2. Such above-described groups, if non-contiguous, but connected by 

land carrying a pipeline, shall not be considered one facility. Sources or 

installations involved in crude oil and gas production in Southern 

California Coastal or Outer Continental Shelf (OCS) Waters and transport 
Rule 1469.1 (Cont.) (Adopted March 4, 2005)

1469.1 - 3

of such crude oil and gas in Southern California Coastal or OCS Waters 

shall be included in the same facility which is under the same ownership 

or use entitlement as the crude oil and gas production facility onshore.

(15) HAND APPLICATION METHOD is the application of materials by 

manually held, non-mechanically operated equipment. Such equipment 

includes paint brushes, hand rollers, caulking guns, trowels, spatulas, 

syringe daubers, rags, and sponges.

(16) HIGH EFFICIENCY PARTICULATE ARRESTORS (HEPA) means 

filter(s) rated at 99.97% or more efficient in collecting particle sizes 0.3 

microns or greater in size.

(17) HIGH-VOLUME, LOW-PRESSURE (HVLP) SPRAY is a material 

application system which is operated at air pressure of between 0.1 and 10 

pounds per square inch gauge (psig).

(18) NEW SOURCE means any source spraying primers or coatings containing 

chromium that is initially operated in the South Coast District after March 

4, 2005.

(19) OPEN FACE ENCLOSURE, for the purpose of this rule means a spray 

enclosure in which one face of the enclosure is not enclosed, and air flows 

through the open face horizontally. Open face enclosure does not include 

any enclosure configured for downdraft ventilation. 

(20) OVERSPRAY is the fraction of coating sprayed that does not adhere to 

the intended surface.

(21) PRIMER is a coating applied to a part for purposes of corrosion 

prevention, protection from the environment, functional fluid resistance 

and/or adhesion of subsequent coatings, adhesives, or sealants.

(22) RECEPTOR means any off-site location where persons may be exposed to 

emissions of hexavalent chromium from a source subject to this rule. 

Receptor locations include residential, commercial, and industrial land use 

areas, and other locations where sensitive populations may be located.

(23) RESIDENTIAL RECEPTOR means a single family dwelling or a multifamily dwelling, including but not limited to a duplex, condominium, 

townhome, apartment building, or other rental unit.

(24) RESPONSIBLE OFFICIAL means one of the following: 

(A) For a corporation: A president, secretary, treasurer, or vice 

president of the corporation in charge of a principal business 

function, or any other person who performs similar policy or 
Rule 1469.1 (Cont.) (Adopted March 4, 2005)

1469.1 - 4

decision-making functions for the corporation, or a duly authorized 

representative of such person if the representative is responsible 

for the overall operation of one or more manufacturing, 

production, or operating facilities and either: 

(i) The facilities employ more than 250 persons or have gross 

annual sales or expenditures exceeding $25 million (in 

second quarter 1980 dollars); or 

(ii) The delegation of authority to such representative is 

approved in advance by the Executive Officer. 

(B) For a partnership or sole proprietorship: a general partner or the 

proprietor, respectively. 

(C) For a municipality, state, Federal, or other public agency: either a 

principal executive officer or ranking elected official. For the 

purposes of this part, a principal executive officer of a Federal 

agency includes the chief executive officer having responsibility 

for the overall operations of a principal geographic unit of the 

agency (e.g., a Regional Administrator of the U.S. Environmental 

Protection Agency [U.S. EPA]). 

(D) For sources (as defined in this rule) applying for or subject to a 

Title V permit: “responsible official” shall have the same meaning 

as defined in District’s Regulation XXX. 

(25) SENSITIVE RECEPTOR includes schools, public and private

(kindergarten through grade 12), licensed daycare centers, hospitals, and 

convalescent homes.

(26) SPRAYING OPERATION or SPRAYING PROCESS, for the purpose of 

this rule, includes the equipment used to spray coatings containing 

chromium, and the spray enclosure in which it is sprayed. Spraying 

operation or spraying process includes all spraying of primers or coatings 

containing chromium, except for thermal spraying operations.

(27) THERMAL SPRAYING OPERATIONS are one of several processes in 

which metallic or nonmetallic surfacing materials are deposited in a 

molten or semi-molten condition on a substrate to form a coating. The 

surfacing material may originate in the form of powder, rod, or wire 

before it is heated, prior to spraying and deposition. Thermal spraying 

operations include: detonation gun spraying, flame spraying, high-velocity 

oxy-fuel spraying, plasma spraying, and twin-wire electric arc spraying.
Rule 1469.1 (Cont.) (Adopted March 4, 2005)

1469.1 - 5

(28) TOUCH UP AND REPAIR OPERATION is that portion of the coating 

operation that is the incidental application of coating used to cover minor 

imperfections in the coating finish or to achieve complete coverage.

(29) TRANSFER EFFICIENCY is the ratio of the weight or volume of coating

solids adhering to an object to the total weight or volume, respectively, of 

coating solids used in the application process, expressed as a percentage.

(d) Requirements

Any person applying a coating containing chromium shall comply with all of the 

following requirements:

(1) Control System Capture Efficiency and Enclosure Standards

On and after July 1, 2007, a person shall not spray primers or coatings 

containing chromium unless such operations are conducted in a manner in 

which all overspray containing chromium is captured and directed to air 

pollution control equipment which is operating during spraying 

operations. Spray enclosures shall meet the following criteria:

(A) Exhaust from all spray enclosures shall be ventilated such that a 

continuous inward flow of air is maintained at all air openings 

during spraying operations; and

(B) The average inward face velocity of air through an open face 

enclosure shall be a minimum of 100 feet per minute or other 

minimum velocity approved by the Executive Officer; and

(C) After spraying operations have ceased, the exhaust system shall be 

kept in operation to remove contaminated air within the spray 

enclosure for a minimum of:

(i) three air exchanges within the spray enclosure; or

(ii) five minutes.

(2) Transfer Efficiency

On and after January 1, 2006, a person shall not apply primers or coatings 

containing chromium at a facility at which such coatings are sprayed

unless they are applied according to operating procedures specified by the 

equipment manufacturer, or applicable permit conditions, and by use of 

one of the following methods:

(A) Flow Coater, Roll Coater, or Dip Coater; or

(B) Hand Application Methods; or

(C) High-Volume, Low-Pressure (HVLP); or 
Rule 1469.1 (Cont.) (Adopted March 4, 2005)

1469.1 - 6

(D) Electrostatic Application; or

(E) Such other alternative application methods as are demonstrated to 

the Executive Officer, using District-approved procedures, to be 

capable of achieving at least equivalent transfer efficiency to the 

method in subparagraph (d)(2)(C) and for which written approval 

of the Executive Officer has been obtained.

(3) Requirements for Facilities Spraying Primers or Coatings Containing 

Chromium

Before July 1, 2007, the owner or operator of a facility with one or more 

new or existing sources subject to this rule shall comply with one of the 

following:

(A) Provided a facility does not emit hexavalent chromium except 

through sources subject to this rule, the owner or operator of a 

facility shall demonstrate in a Compliance Plan submitted pursuant 

to paragraph (d)(4) that emissions of hexavalent chromium from 

all spraying operations do not exceed the emission limits in clause 

(d)(3)(A)(i) or (d)(3)(A)(ii), as appropriate, as calculated after air 

pollution controls, where applicable, in accordance with the 

procedures in Appendices 1 and 2.:

(i) 0.018 lbs per year, calculated from July 1 through June 30

of each year, or applicable emission limit adjusted for 

receptor distance and operating schedule in Table 2-2, if a 

facility is located more than 25 meters (82 ft) from a 

residential or sensitive receptor; or

(ii) 0.007 lbs per year, calculated from July 1 through June 30

of each year, if a facility is located 25 meters (82 ft) or less 

from a residential or sensitive receptor, or located 100 

meters (328 ft) or less from an existing school; or

(B) Ventilate each source at a facility to air pollution control 

equipment with a rated particulate filtration efficiency of 99.97% 

or higher, for particulate matter 0.3 microns and larger; or

(C) Demonstrate that facility-wide emissions of all toxic air 

contaminants result in a cancer risk at all receptor locations 

through submittal of an approved health risk assessment that 

reflects representative operating conditions, or submittal of a Risk 

Reduction Plan developed pursuant to Rule 1402 that is fully 
Rule 1469.1 (Cont.) (Adopted March 4, 2005)

1469.1 - 7

implemented prior to July 1, 2007, or submittal of evidence of 

enforceable permit conditions that limit cancer risk to:

(i) 25 in a million if a facility is located more than 25 meters 

(82 ft) from a residential or sensitive receptor; or

(ii) 10 in a million if a facility is located 25 meters (82 ft) or 

less from a residential or sensitive receptor, or located 100 

meters (328 ft) or less from an existing school.

(4) Compliance Plan

(A) On or before January 1, 2006, the owner or operator of an existing 

source complying with the requirements of subparagraph 

(d)(3)(A), or an existing source complying with the requirements 

of subparagraph (d)(3)(C) that does not have an approved health 

risk assessment as of January 1, 2006 shall submit a Compliance 

Plan to the Executive Officer subject to plan fees specified in Rule 

306. The Compliance Plan shall include the following 

information:

(i) Facility name, address and contact person; and,

(ii) SCAQMD permit numbers or application numbers for all 

equipment subject to this rule; and,

(iii) Calculations for annual emissions of hexavalent chromium, 

for any twelve consecutive months of data during calendar 

years 2004 and 2005, except as approved by the Executive 

Officer. Emissions shall be calculated in accordance with 

the procedure in Appendix 1; and,

(iv) Material Safety Data Sheets (MSDS) for all products which 

list chromium, hexavalent chromium or a chromate, used in 

a source subject to this rule; and,

(v) Information on nearby receptors, including the distances to 

the nearest residence, commercial or industrial receptor, 

sensitive receptor and school, measured in accordance with 

the procedure in Appendix 2; and,

(vi) Information on spraying operations, including the number 

of gallons sprayed per year for each product containing 

chromium or chromate, except as approved by the 

Executive Officer, and type of spray method; and,
Rule 1469.1 (Cont.) (Adopted March 4, 2005)

1469.1 - 8

(vii) Information on emission release parameters, including 

height of stack for emissions released from a stack, or the 

dimensions and height of the building in which the 

spraying operation occurs, for emissions released inside of 

a building; and,

(viii) Average inward face velocity of the spray enclosure, as 

required by subparagraph (d)(1)(B), and the method and 

instrument used to measure the average inward face 

velocity; and,

(ix) Calculation of the length of time necessary to exhaust the 

volume of air required by clause (d)(1)(C)(i), if applicable; 

and,

(x) Source test results submitted pursuant to subdivision (g), if 

applicable; and,

(xi) Calculation of hexavalent chromium emissions from touch 

up and repair operations under subdivision (h), if 

applicable.

(B) After review of the data submitted under subparagraph (d)(4)(A), 

the Executive Officer will notify facilities in writing whether the 

Compliance Plan is approved or disapproved. If a Compliance 

Plan is disapproved, the owner or operator shall resubmit the 

Compliance Plan, subject to plan fees specified in Rule 306, within 

60 days after notification of disapproval of the Compliance Plan. 

The resubmitted Compliance Plan shall include the information 

required under subparagraph (d)(4)(A), and the owner or operator 

shall correct any deficiencies as identified in the Compliance Plan 

disapproval letter.

(C) After review of the data in a Compliance Plan submitted pursuant 

to subparagraph (d)(4)(B), the Executive Officer will notify 

facilities in writing whether the Compliance Plan is approved or 

disapproved.

(D) If a Compliance Plan submitted pursuant to subparagraph (d)(4)(C) 

is disapproved, the owner or operator shall comply with the 

requirements of subparagraph (d)(3)(B) within twelve months after 

notification that the Compliance Plan is disapproved. 
Rule 1469.1 (Cont.) (Adopted March 4, 2005)

1469.1 - 9

(E) Posting of Compliance Plan Approval Letter

(i) The Compliance Plan approval letter for equipment not 

subject to a facility permit under Regulation XXX or 

Regulation XX shall be mounted so as to be clearly visible 

in an accessible place within 8 meters (26 feet) of the spray 

booth enclosure identified in the Compliance Plan 

submitted under paragraph (d)(4), or as otherwise approved 

in writing by the Executive Officer.

(ii) The Compliance Plan approval letter for equipment subject 

to a facility permit under Regulation XXX or Regulation 

XX shall be kept with the facility permit, or as otherwise 

approved in writing by the Executive Officer.

(F) The owner or operator of a facility shall comply with all conditions 

in an approved Compliance Plan.

(5) Application Submittal for New Control Equipment or Permit Modification

Not later than July 1, 2006, an owner or operator of a facility shall submit 

to the Executive Officer complete application(s) for new control 

equipment or modification of existing control equipment, as specified in 

the Compliance Plan to meet the requirements specified in paragraph 

(d)(3). 

(6) Notification of Compliance

On or before July 1, 2007, the owner or operator of a source not required 

to submit a compliance plan pursuant to paragraph (d)(4) shall submit a 

Notification of Compliance to the Executive Officer. The Notification of 

Compliance shall include the following information:

(A) The facility name, address and contact person; and

(B) A statement, signed by a responsible official that the facility is in 

compliance with the requirements of subparagraph (d)(3)(B) or 

(d)(3)(C), as appropriate; and,

(C) Evidence of compliance with subparagraph (d)(3)(B) or (d)(3)(C), 

including but not limited to:

(i) Application or permit number of each source required 

under paragraph (d)(5); and,

(ii) A copy of the approval to use source test results submitted 

pursuant to clause (d)(4)(A)(x), if applicable; and,
Rule 1469.1 (Cont.) (Adopted March 4, 2005)

1469.1 - 10

(iii) The approval date and approved cancer risk of a health risk 

assessment demonstrating compliance with subparagraph 

(d)(3)(C), if applicable; and,

(iv) Emissions or risk calculations from all sources subject to 

this rule emitting hexavalent chromium, if applicable.

(7) Housekeeping

Effective July 1, 2005, the owner or operator of a source subject to this 

rule shall conduct spraying and cleanup operations in a manner that 

minimizes fugitive emissions of atomized paint particles, including but not 

limited to the criteria in subparagraphs (d)(7)(A) and (d)(7)(B).

(A) When removing protective floor, wall or exhaust coverings within 

the spray booth enclosure, the operator shall:

(i) Operate the ventilation system; and,

(ii) Ensure that the door of a fully enclosed spray booth is 

closed; and,

(iii) Encapsulate those materials contaminated with primers or 

coatings containing chromium that are intended to be 

disposed of in a bag or container before removing from the 

spray booth.

(B) The owner or operator of a source subject to this rule shall not 

operate the ventilation system when one or more filters, including 

HEPA filters are being removed or replaced.

(e) Emissions Inventory and Health Risk Assessment

(1) The owner or operator of a facility complying with the requirements 

specified in subparagraph (d)(3)(C) that does not have an approved health 

risk assessment as of January 1, 2006, shall submit to Executive Officer

not later than July 1, 2006, an emissions inventory and health risk 

assessment prepared pursuant to Rule 1402 for existing sources, and new 

sources where a permit application is submitted on or before January 1, 

2006.

(2) The facility-wide cancer risk of a health risk assessment submitted 

pursuant to paragraph (e)(1) shall be calculated in accordance with the 

Risk Assessment Procedures referenced in Rule 1402. Health risk from 

chromium spraying operations shall be presented:

(A) With existing controls; and
Rule 1469.1 (Cont.) (Adopted March 4, 2005)

1469.1 - 11

(B) After installation of proposed controls, if appropriate, using the 

default filter efficiency listed in Table 1-2, or an alternate filter 

efficiency approved by the Executive Officer, or source test results 

approved by the Executive Officer, if applicable.

(3) After review of all data required under paragraphs (d)(4), (e)(1) and (e)(2), 

the Executive Officer will notify facilities in writing if the health risk 

assessment submitted under paragraphs (e)(1) and (e)(2) is approved or 

disapproved, and the approved cancer risk of the health risk assessment. If 

the approved health risk assessment conducted pursuant to paragraph 

(e)(1) results in a cancer risk that exceeds the cancer risk levels specified 

in subparagraph (d)(3)(C) or the health risk assessment is disapproved the

owner or operator of a facility shall:

(A) submit an application for permit(s) to operate the control 

equipment required to meet subparagraph (d)(3)(B) within six

months after the date of notification of the approved or 

disapproved health risk assessment; and

(B) comply with the applicable requirements of subparagraph (d)(3)(B) 

no later than 12 months after notification of the approved or 

disapproved health risk assessment.

(4) The owner or operator of a facility complying with the requirements of 

subparagraph (d)(3)(C), shall comply with enforceable conditions to 

ensure that the facility complies with the risk requirements specified in 

clauses (d)(3)(C)(i) or (d)(3)(C)(ii).

(f) Addition of New Sources and Modification to Existing Sources

(1) For permit applications submitted for new or modified existing sources

after January 1, 2006 and on or before July 1, 2007, the owner or operator 

of facility shall demonstrate compliance with subparagraphs (d)(3)(A), 

(d)(3)(B), or (d)(3)(C) on or before July 1, 2007.

(2) After July 1, 2007, the owner or operator of a facility that submits a permit

application for a new or modified existing source subject to this rule shall

demonstrate compliance with paragraph (d)(3) upon submittal of the 

permit application. Demonstration of compliance with paragraphs (d)(3) 

shall require submittal of a:

(A) new compliance plan pursuant to paragraph (d)(3) if complying 

with the requirements of subparagraph (d)(3)(A); or
Rule 1469.1 (Cont.) (Adopted March 4, 2005)

1469.1 - 12

(B) revised emissions inventory and health risk assessment prepared

pursuant to Rule 1402, if complying with the requirements of 

subparagraph (d)(3)(C).

(3) The owner or operator of a facility submitting a permit application for a 

new or modified existing source subject to this rule in which there is not 

an increase in emissions and in which there is not an increase in health risk 

at any receptor location shall not be required to comply with the 

requirements of paragraph (f)(2).

(g) Source Test Results

Results from a source test conducted for the purpose of demonstrating mass 

emissions from a new or existing source subject to this rule may be used as the 

basis for calculating facility emissions in order to demonstrate compliance with 

the emission limit in subparagraph (d)(3)(A) or to calculate emissions from 

spraying operations under clause (d)(4)(A)(iii). Unless otherwise approved in 

writing by the Executive Officer, the following criteria shall be met:

(1) The source test protocol and source test report are approved by the 

Executive Officer prior to January 1, 2006; and,

(2) Both total chromium and hexavalent chromium were measured during the 

source test; and,

(3) The air pollution control equipment configuration is identical to the 

configuration when the equipment was tested; and,

(4) The operating parameters of all affected air pollution control equipment 

are identical or substantially similar to the source tested equipment; and,

(5) The chromate-containing primer or coating sprayed during the source test 

has the highest percentage by weight of chromium of any primer or 

coating currently sprayed at the facility.

(h) Exemptions

(1) The requirements of paragraph (d)(1) shall not apply to any touch up and 

repair operation spraying coatings containing chromium that is conducted 

outside of a spray enclosure, provided the touch up and repair operation is 

not performed outside of a building, and emissions and cancer risk from 

the touch up and repair operation are calculated and included in an 

approved Health Risk Assessment which meets the risk levels specified in 

subparagraph (d)(3)(C).
Rule 1469.1 (Cont.) (Adopted March 4, 2005)

1469.1 - 13

(2) The requirements of paragraph (d)(1) and (d)(2) shall not apply to any 

touch up and repair operation spraying coatings containing chromium that 

is conducted outside of a spray enclosure, provided the touch up and repair 

operation is not performed outside of a building; and

(A) Emissions from the touch up and repair operation are calculated in 

an approved Compliance Plan; and

(B) Total facility-wide emissions of hexavalent chromium from all 

spraying operations are demonstrated to be less than the level in 

subparagraph (d)(3)(A).

(i) Compliance Test Methods

(1) Capture efficiency of the emissions collection system shall be determined 

by EPA Test Method 204 – Criteria for and Verification of a Permanent or 

Temporary Total Enclosure, or any other method approved by the 

Executive Officer.

(2) Transfer efficiency of alternative coating application methods under 

subparagraph (d)(2)(E) shall be determined in accordance with the 

SCAQMD method "Spray Equipment Transfer Efficiency Test Procedure 

for Equipment User, May 24, 1989", or subsequent revisions.

(j) Recordkeeping Requirements

(1) Effective July 1, 2005, the owner or operator of a facility subject to this 

rule shall maintain records to demonstrate compliance with the applicable 

requirements in subdivisions (d) and (h). At a minimum, records shall 

include all of the following information:

(A) Purchase records of primers or coatings containing chromium used 

for spray coating operations; and

(B) Material Safety Data Sheets or Technical Data Sheets provided 

with the materials subject to the requirements of subparagraph

(j)(1)(A) that indicate the weight percent of chromate(s) in the 

primer or coating, and the density of the primer or coating; and

(C) Daily usage records for each primer or coating subject to this 

requirement, applied or used daily; and

(D) Application method for each primer or coating used; and
Rule 1469.1 (Cont.) (Adopted March 4, 2005)

1469.1 - 14

(E) Calculations conducted according to the procedures outlined in 

Appendix 1 and Appendix 2 that demonstrate annual mass 

emissions from each source subject to this rule, in pounds per year.

(2) The owner or operator of a facility subject to this rule shall maintain 

records to demonstrate compliance with the monitoring requirements of 

subdivision (k). The following parameters shall be recorded:

(A) The name of the person(s) performing the inspection and/or 

maintenance operations; and

(B) The date, time and results of the inspection; and

(C) The date, time and description of any maintenance activity or 

repairs resulting from the inspection; and

(D) The pressure drop across the air pollution control system filter 

media. Pressure drop shall be recorded once per week, for any 

week in which spraying operations using coatings containing 

chromium are conducted on one or more days.

(3) Records shall be kept in a format acceptable to the District for a minimum 

of three years and shall be made available to District personnel upon 

request.

(k) Monitoring Requirements

(1) Weekly Inspection of Air Pollution Control Equipment

The owner or operator of a facility subject to this rule shall perform a 

weekly visual inspection of the equipment and filter media subject to this 

rule for leaks, broken or torn filter media, and improperly installed filter 

media.

(2) Pressure Drop Across Air Pollution Control Equipment Filter Media

The owner or operator of a facility shall install a gauge to continuously 

monitor the pressure drop across the air pollution control equipment filter 

media. A gauge shall be located so that it can be easily visible and in clear 

sight of the operation or maintenance personnel. The pressure drop shall 

be maintained at or below the pressure drop prescribed by a permit 

condition, or by the manufacturer’s recommended operating range if no 

permit condition limits pressure drop.
Rule 1469.1 (Cont.) (Adopted March 4, 2005)

1469.1 - 15

(l) Reporting Requirements

Annual Chromium Coatings Usage Report

The owner or operator of a facility with a source subject to this rule complying 

with subparagraph (d)(3)(A) or subparagraph (d)(3)(C) shall submit a report to the 

Executive Officer by September 1 each year with the following information:

(1) Facility name, address and contact person; and,

(2) Annual usage of each coating or primer containing hexavalent chromium 

for the previous fiscal year (July 1 through June 30), in gallons per year; 

and,

(3) Chromate content of each coating or primer containing chromium used 

during the previous fiscal year (July 1 through June 30); and,

(4) Permit number or application number of each spray booth used to spray 

chromium; and,

(5) Usage of coatings or primers containing chromium in each spray booth 

used to spray chromium.
Rule 1469.1 (Cont.) (Adopted March 4, 2005)

1469.1 - 16

Appendix 1 - Emission Calculation Method

This Appendix establishes the emission calculation method that must be used in 

accordance with subparagraph (d)(3)(A) of Rule 1469.1, except for facility operators 

submitting source test results under subdivision (g), or an alternative procedure approved 

by the Executive Officer.

Emissions of hexavalent chromium from spraying operations must be calculated in 

accordance with the procedures specified.

Step 1:Identify all primers or coatings that contain chromium or chromate. Examples of 

chromates commonly formulated in coatings include strontium chromate, zinc 

chromate, lead chromate, calcium chromate and barium chromate.

Step 2:Determine the percentage by weight of chromate in each primer or coating. This

data can be obtained from the Material Safety Data Sheet (MSDS) for the product, 

or by contacting the manufacturer. Chromate percentage may be given as a single 

value (ex: SrCrO4 – 15%/wt), or it may be given as a range (ex: Zinc Chromate –

12%/wt - 22%/wt). Use the highest value to calculate emissions if chromate 

content in a primer or coating is given as a range.

Step 3:Determine the fraction of hexavalent chromium in the chromate. This is the 

molecular weight of chromium in the chromate, divided by the molecular weight 

of the entire chromate. All chromium in the chromate is assumed to be 

hexavalent. The hexavalent fraction of common chromates used in primers and 

coatings is given in Table 1-1.

Table 1-1 - Hexavalent Fraction of Common Chromate Primers

Chromate

Molecular 

Formula

Hexavalent 

Fraction

Barium Chromate BaCrO4 0.205

Calcium Chromate CaCrO4 0.333

Lead Chromate PbCrO4 0.161

Strontium Chromate SrCrO4 0.255

Zinc Chromate ZnCrO4.7HOH 0.169

Step 4:Determine the density for each primer or coating used during the year. This data 

may be obtained from the Material Safety Data Sheet (MSDS) or the Technical 

Data Sheet (TDS) supplied with each primer or coating. Density data may be 

given in bulk density (ex: density = 9.2 lbs/gallon) or as specific gravity (ex: s.g. 

= 1.15). Multiply specific gravity by 8.34 to obtain bulk density.
Rule 1469.1 (Cont.) (Adopted March 4, 2005)

1469.1 - 17

Step 5:Compile the annual usage for each primer or coating sprayed during the year that 

contains chromium or chromate. Usage is the number of gallons of each primer 

or coating.

Step 6:Determine the control efficiency of the filters in your air pollution control (APC) 

system. A source test approved by the Executive Officer may be used, if both 

inlet and outlet concentrations of particulate matter were measured during the 

source test. Use the default control efficiencies in Table 1-2 if no source test data 

are available. If more than one type of filter is used in series to control emissions

(ex: blanket-type filter followed by two-stage NESHAP-compliant filters), only 

consider the highest rated control efficiency.

Table 1-2 - Default Control Efficiencies

Control Equipment

Control 

Efficiency

Conventional Spray Booth Filters

90%

Water-wash Booth

Two-stage Aerospace NESHAP-compliant 

Filters

Pocket-type Filters

Accordion Filters

Three-stage Aerospace NESHAP-compliant 

Filters 95%

Cartridge Filters 99%

Bag House

High Efficiency Particulate Arrestor (HEPA) 

Filters (individually dioctyl phthalate (DOP) or 

equivalent tested)

99.97%

Note: If a filter manufacturer guarantees a control efficiency higher than 

the default values in Table 1-2 for the type of filter media in use (for

particulate sizes greater than 0.3 microns), submit the manufacturer’s test 

data with your Compliance Plan for consideration. The actual control 

efficiency used to evaluate your Compliance Plan is up to the discretion of 

The Executive Officer, based on the data presented.

Step 7:Calculate hexavalent chromium emissions, after existing control equipment, for 

each primer or coating containing chromium or chromate used during the year.

Emissions (lbs/yr) = 

[Usage (gallons/yr)] *

[Coating Density (lbs/gal)] *

[Chromate Content (%/wt)] *
Rule 1469.1 (Cont.) (Adopted March 4, 2005)

1469.1 - 18

[Hexavalent Fraction of Chromate] *

[1 – Transfer Efficiency (%)] *

[1 – Filter Efficiency (%)]}

Use 65% transfer efficiency unless another transfer efficiency has been approved 

by the Executive Officer. Provide a separate calculation for each primer or 

coating that contains chromate used at your facility during the calendar year.

Step 8:Sum emissions from each primer or coating sprayed at your facility during the 

year that has chromium or chromate.
Rule 1469.1 (Cont.) (Adopted March 4, 2005)

1469.1 - 19

Appendix 2 – Distance-Adjusted Annual Emission Levels For Facilities 

Located More Than 25 Meters (82 ft) from a Residence or Sensitive Receptor.

Facilities complying with the facility-wide emission limit in clause (d)(3)(A) may 

adjust the annual emission limit, according to actual receptor distance. Use the 

following tables to determine the appropriate annual emissions for compliance 

with the limits in subparagraph (d)(3)(A), according to the distance to the nearest 

receptor. The nearest receptor includes commercial, industrial, sensitive and 

residential receptors. Use Table 2-1 for the distance measurement criteria, and 

use Table 2-2 to look up the emission limit for the nearest commercial/industrial 

receptor, and for the nearest sensitive/residential receptor. The allowable 

emission limit for your facility is the lower of the two values.

Receptor distance is measured as follows:

Table 2-1

Measuring Receptor Distance

Source Type Measure From: Measure To:

Single Stack Venting 

Chrome-Spraying 

Process(es)

Stack Property Line of

Nearest Receptor

Multiple Stacks Venting 

Chrome-Spraying 

Process(es)

Centroid of Stacks Property Line of

Nearest Receptor

Emissions Released 

Inside of Building

Center of Building Property Line of

Nearest Receptor
Rule 1469.1 (Cont.) (Adopted March 4, 2005)

1469.1 - 20

Table 2-2

Distance-Adjusted Hexavalent Chromium Emissions For Equipment 

Subject to Subparagraph (d)(3)(A)

Distance to 

Nearest 

Receptor

Meters >25 30 35 40 45 50 55 60

Feet >82 98 115 131 148 164 180 197

Spray Booth 

Operating 

Schedule

Nearest 

Receptor 

Type Distance-adjusted Annual Emission Limit (lbs/yr)

12 Hrs/Day or 

Less

Residential 

or Sensitive 0.018 0.019 0.02 0.022 0.024 0.027 0.029 0.032

More Than 12 

Hrs/Day

Residential 

or Sensitive 0.032 0.032 0.032 0.032 0.032 0.032 0.034 0.036

12 Hrs/Day or 

Less

Commercial 

or Industrial 0.021 0.023 0.025 0.027 0.029 0.032 0.035 0.039

More Than 12 

Hrs/Day

Commercial 

or Industrial 0.038 0.038 0.038 0.038 0.038 0.038 0.041 0.043

Distance to 

Nearest 

Receptor

Meters 65 70 75 80 85 90 95 100

Feet 213 230 246 262 279 295 312 328

Spray Booth 

Operating 

Schedule

Nearest 

Receptor 

Type Distance-adjusted Annual Emission Limit (lbs/yr)

12 Hrs/Day or 

Less

Residential 

or Sensitive 0.037 0.042 0.049 0.053 0.058 0.064 0.071 0.081

More Than 12 

Hrs/Day

Residential 

or Sensitive 0.039 0.042 0.045 0.048 0.051 0.055 0.059 0.064

12 Hrs/Day or 

Less

Commercial 

or Industrial 0.044 0.05 0.059 0.064 0.07 0.077 0.086 0.097

More Than 12 

Hrs/Day

Commercial 

or Industrial 0.047 0.05 0.055 0.058 0.062 0.066 0.071 0.077