Nov. 11, 2008 Proposed Amended Rule ATTACHMENT 3 Rule 74.18: 1 

VENTURA COUNTY AIR POLLUTION CONTROL DISTRICT 

RULE 74.18 - MOTOR VEHICLE AND MOBILE EQUIPMENT COATING 

OPERATIONS 

(Adopted 1/28/92, Revised 12/13/94, 9/10/96, / / ) 

A. Applicability and Purpose

 The provisions of this rule apply to any person who manufactures, distributes, supplies, 

sells, offers for sale, applies or solicits the use of, automotive coatings for motor 

vehicles, mobile equipment, and their parts or components. The purpose of this rule is to 

limit reactive organic compound (ROC) emissions from coatings and solvents used in 

production, repair, refinish, or maintenance operations where motor vehicles, mobile 

equipment, and associated parts and components are coated.

B. Requirements 

 

 1. No person shall coat any vehicles, mobile equipment, or their associated parts 

and components, using any coating with a Reactive Organic Compound (ROC) 

content in excess of the following limits: 

Limits 

Grams of ROC per Liter of Coating, As Applied, Less Water 

and Exempt Organic Compounds 

 

Coating Category Effective 

Adoption 

Date 

Effective

January 1

2009

Effective

January 1, 

2010

Adhesion Promoter 840 540

Clear Coating 250

Color Coating 760 420

Multi-Color Coating 840 680

Pretreatment Coating 780 660

Primer 250 

Primer Sealer 340 250

Single-Stage Coating

 Nonmetallic/Noniridescent

420 340

Single Stage Metallic/Iridescent 

Coating

520 340

Temporary Protective Coating 420 60

Truck Bed Liner Coating 840 310

Underbody Coating 840 430

Uniform Finish Coating 840 540

Water-Reducible Electrophoretic 

Brake Component Coating

440

Any other coating type (default) 840 250

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Deleted: specifies

Deleted: Group I Vehicles, Group II 

Vehicles/Equipment (color match 

required), and Small Production/Utility 

Bodies (color match required): * 

Deleted: Group I

Deleted: any Group II vehicles and 

mobile equipment where color match is 

required, or any small production/utility 

bodies where color match is required, 

Deleted: /Primer Surfacer

Deleted: 

Deleted: 10/96
Nov. 11, 2008 Proposed Amended Rule ATTACHMENT 3 Rule 74.18: 2 

 

2. Most Restrictive ROC Limit. If anywhere on the container of any automotive 

coating, or any label or sticker affixed to the container, or in any sales, 

advertising, or technical literature supplied by a person, any representation is 

made that indicates that the coating meets the definition of or is recommended for 

use for more than one of the coating categories listed in Subsection B.1, then the 

lowest ROC content limit shall apply.

 3. Alternative Compliance (Add-on Control Equipment Option): 

 A person may comply with the provisions of Subsection B.1 (coating limits) by 

using an emission control system provided that: 

 a. The combined control and capture efficiency shall reduce total organic 

compound (TOC) emissions from an emission collection system by at 

least 85 percent, by weight, and 

 b. Written approval in the form of an Authority to Construct and a Permit to 

Operate for such equipment is received from the Air Pollution Control 

Officer (APCO). 

c. Any approved emission control system shall be maintained and used at all 

times in proper working condition.

 4. Coating Application Methods (Transfer Efficiency): No person shall apply any 

coating to any motor vehicle or mobile equipment or their associated parts and 

components unless one of the following methods is properly used: 

 a. Hand application methods including, but not limited to: brush, dip or 

roller

 b. Electrophoretic dip coating 

 c. Electrostatic application, operated at a minimum of 60 KV 

 d. High-Volume, Low-Pressure (HVLP) spray equipment: If a spray gun is 

used, the end user shall demonstrate that the spray gun meets the 

definition of HVLP in design and use. A satisfactory demonstration shall 

be based on the manufacturer’s published technical material on the design 

of the gun and by a demonstration of the operation of the spray gun using 

an air pressure tip gauge from the spray gun manufacturer.

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Left

Deleted: 2. Group II 

Vehicles/Equipment (no color match 

required), Small Production/Utility 

Bodies (no color match required) and 

Large Production/Utility Bodies: * No 

person shall coat Group II vehicles and 

equipment or their parts and components 

where color match is not required, small 

production/utility bodies where color 

match is not required, or large 

production/utility bodies, using any 

coating with a ROC content in excess of 

the following limits, expressed as grams 

of ROC per liter of coating applied, 

excluding water and exempt organic 

compounds:¶

¶

Page Break

Limits¶

Grams of ROC per Liter of Coating, Less 

Water¶

and Less Exempt Organic Compounds¶

¶

Pretreatment Wash Primer 780

Primer, Primer Surfacer, Primer 

Sealer 250

Multistage Topcoat 340

Single Stage Metallic/Iridescent 

Topcoat 420

Single Stage Nonmetallic/Noniridescent 

Topcoat 340

Camouflage 420

Specialty Coating 840

Deleted: a.

Deleted: s

Deleted: or B.2

Deleted: air pollution control 

equipment

Deleted: 1.

Deleted: 2.

Deleted: b. A person may comply 

with the provisions of Subsection B.4 

(transfer efficiency) by using add-on 

control equipment provided the combined 

control and capture efficiency is at least 

92 percent, by weight.

Deleted: Group I or II

Deleted: exterior

Deleted: application

Deleted: 

Deleted: 10/96
Nov. 11, 2008 Proposed Amended Rule ATTACHMENT 3 Rule 74.18: 3 

 e. Alternative Application Method: Any other alternative method that 

achieves a transfer efficiency equivalent to, or higher than, one of the 

application methods listed in Subsections B.4.a, B.4.b, B.4.c, or B.4.d. 

Written approval of the APCO shall be obtained for each alternative 

method prior to use.

 5. Prohibition of Specification: No person shall solicit or require for use or specify 

the application of any automotive coating or cleaning solvent on any motor 

vehicle, mobile equipment, or their associated parts or components if such use or 

application results in a violation of the provisions of this Rule. The prohibition of 

this Subsection shall apply to all written or oral contracts, including, but not 

limited to job orders, under the terms of which any coating or solvent which is 

subject to the provisions of this Rule is to be applied to any motor vehicle, mobile 

equipment, or their associated parts and components at any physical location 

within the District. 

 6. Prohibition of Sale: 

 a. Except as provided in Subsections B.6.b and B.6.c, no person shall 

manufacture, blend, repackage for sale, supply, offer for sale or sell, or 

distribute within the District, any coating that is regulated by Subsection 

B.1, of this Rule if the application of such product is prohibited, at the 

time of sale. 

 

 b. The prohibition in Subsection B.6.a shall apply to the sale of any coating 

that will be applied at any physical location within the District and shall 

not apply to any coating shipped outside of the District for use outside of 

the District, sold in the District for use outside the District, or 

manufactured in the District for use outside the District. 

 c. The prohibition in Subsection B.6.a shall not apply to the sale of coatings 

where the emissions to the atmosphere from the application of those 

coatings are controlled by an APCD-approved emission control system

that meets the requirements of Subsection B.3.

 d. Any person claiming an exemption from the sales prohibition as allowed 

by Subsection B.6.b or B.6.c shall keep a detailed log of each automotive 

coating and component manufactured, blended, repackaged for sale, 

supplied, sold, offered for sale, or distributed that lists:

 1). The quantity manufactured, blended, repackaged for sale, or 

distributed, including size and number of containers;

 2) The VOC regulatory and VOC actual for coatings;

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Deleted: Any other coating application 

method which has been demonstrated to 

be capable of achieving at least 65 

percent transfer efficiency.

Deleted: a

Deleted: a Group I or II

Deleted: their 

Deleted: and B.6.d,

Deleted: s

Deleted: B.2 or B.12

Deleted: b. The sales prohibition in 

Subsection B.6.a shall not apply to the 

sale of any coating supplied in a 

nonaerosol container with a capacity of 

16 fluid ounces or less, and shall not 

apply to any coating in an aerosol 

container.

Deleted: c.

Deleted: or

Deleted: d.

Deleted: 

Deleted: ROC add-on control device

Deleted: 

Deleted: 10/96
Nov. 11, 2008 Proposed Amended Rule ATTACHMENT 3 Rule 74.18: 4 

 3) To whom they were supplied, sold, offered for sale, or distributed, 

or for whom they were manufactured, blended, or repackaged for 

sale including the name, address, phone number, retail license 

number, and valid district permit number

 4) Identification of which exemption is being utilized.

 7. Compliance Statement Requirements: 

 a. For each individual automotive coating or coating component, the 

manufacturer and repackager shall include the following information on 

product data sheets or an equivalent medium:

 1). The VOC actual for coatings and VOC regulatory for coatings, 

expressed in grams per liter;

 2). The weight percentage of volatiles, water, and exempt compounds;

 3). The volume percentage of water and exempt compounds; and

 4). The density of the material (in grams per liter).

 b. For each individual ready to spray mixture (based on the manufacturer’s 

and repackager’s stated mix ratio), the manufacturer and repackager shall 

include the following information on product data sheets, or an equivalent 

medium:

 1) The VOC actual for coatings and VOC regulatory for coatings, 

expressed in grams per liter;

 2) The weight percentage of volatiles, water, and exempt compounds;

 3) The volume percentage of water and exempt compounds; and

 4) The density of the material (in grams per liter)

 c. The manufacturer and repackager of a cleaning solvent subject to this rule 

shall include the VOC content, as supplied, expressed in grams per liter, 

on product data sheets, product labels, or an equivalent medium.

 8. Surface Preparation and Cleaning Operations: The requirements of this 

subsection shall apply to any person using organic solvent for surface preparation 

and cleaning operations. 

 

 a. Until January 1, 2010, no person shall use organic solvent for cleaning 

operations, unless,

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Deleted: The manufacturer of coatings 

subject to this Rule shall include a 

designation of the VOC content as 

supplied, including coating components, 

expressed in grams per liter or pounds per 

gallon, excluding water and exempt 

organic compounds, on labels or data 

sheets. This designation shall include a 

statement of manufacturer's 

recommendation regarding thinning, 

reducing, or mixing with any other VOC 

containing materials. This statement shall 

include the VOC on an as-applied basis, 

excluding water and exempt organic 

compounds, based on the manufacturer's 

recommendations.

Deleted: Cleanup Solvent

Deleted: S

Deleted: cleanup

Deleted: a. Closed containers shall be 

used for the storage or disposal of 

solvent-containing cloth or paper used for 

surface preparation and cleanup. 

Containers shall be nonabsorbent.

Deleted: b

Deleted: N

Deleted: cleanup

Deleted: :

Deleted: 

Deleted: 10/96
Nov. 11, 2008 Proposed Amended Rule ATTACHMENT 3 Rule 74.18: 5 

 1) An enclosed gun washer or "low emission spray gun cleaner" that 

has been approved in writing by the APCO is properly used for 

spray equipment cleaning, and 

 2) The ROC composite partial pressure of organic solvent used for 

cleanup, including spray equipment cleaning, is less than 45 mm 

Hg at a temperature of 20oC . 

 

 b. Until January 1, 2010, no person shall use ROC-containing materials 

which have an ROC content exceeding 200 grams per liter of material for 

substrate surface preparation prior to coating. 

 c. Effective January 1, 2010, no person shall use a solvent for any cleaning 

operation that has an ROC content exceeding 25 grams per liter of 

material.

9. Storage of ROC-Containing Materials: All automotive coating components, 

automotive coatings and solvents including all ROC-containing materials shall be 

stored in closed vapor-tight, non-leaking, nonabsorbent containers, except while 

adding or removing them from containers.

10. Prohibition of Possession:

 a. Coatings: No person shall possess at any automotive refinishing 

facility, any automotive coating that is not in compliance with Subsection 

B.1 (unless Alternative Compliance is used pursuant to Subsection B.3),

or any aerosol coating that is not in compliance with CARB regulations.

 b. Solvents: Effective January 1, 2010, no person shall possess at any 

automotive refinishing facility, any solvent designated by labels or 

technical data sheets as applicable for automotive cleaning operations that

has an ROC content exceeding 25 grams per liter of material, excluding: 

 1) Paint strippers or paint removers having labels or technical data 

sheets indicating the primary purpose of the product is to remove 

cured coatings.

 2) Surface preparation cleaning solvents listed in an approved Low 

Usage Exempt Surface Prep Cleaner Compliance Plan and 

identified by a unique label, tag or sticker that is described in the 

Compliance Plan.

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Deleted: c.

Deleted: N

Deleted: of more than

Deleted: 9. Liquid Cleaning Material 

Compliance Statement: Effective 

September 10, 1997, the manufacturer of 

liquid cleaning materials used in coating 

operations shall designate on product 

labels or data sheets the ROC content and 

ROC Composite Partial Pressure of 

cleaning materials as supplied. This 

designation shall include 

recommendations regarding mixing with 

any other ROC containing materials, and 

express the cleaning material ROC 

content when used in accordance with the 

manufacturer's recommendations. All 

letters and numbers used to designate 

ROC or VOC content on product labels 

shall be visible and legible.¶

Deleted: 10. Storage of ROCContaining Materials: All ROC 

containing materials, including but not 

limited to, fresh or spent solvent, coatings 

and reducers, shall be kept in closed 

containers when not in use.

Deleted: 11. Specialty Coatings: No 

person shall use any specialty coating 

with a ROC content in excess of 840 

grams of ROC per liter of coating 

applied, excluding water and exempt 

organic compounds. Use of all specialty 

coatings, except antiglare/safety coatings, 

shall not exceed 10.0 percent of all 

coatings applied, averaged on a monthly 

(calendar) basis.

Deleted: 

Deleted: 10/96
Nov. 11, 2008 Proposed Amended Rule ATTACHMENT 3 Rule 74.18: 6 

11. Air Toxic Control Measure for Coatings Containing Hexavalent Chromium or 

Cadmium: No person shall apply any coatings to any motor vehicle, mobile 

equipment, or their parts or components, if that coating contains hexavalent 

chromium or cadmium.

 12. Spray Booth and Prep Stations: No person shall apply any coating to any motor 

vehicle, mobile equipment, or their parts or components, unless that application is 

performed within a properly maintained and operated stationary Spray Booth or 

properly maintained and operated Prep Station.

13. Labeling Requirements: All letters or numbers on product labels designating 

VOC or ROC content shall be visible and legible.

 a. The manufacturer or repackager of automotive coatings shall include the 

applicable use category(ies), and the VOC actual for coatings and VOC 

regulatory for coatings, as supplied, expressed in grams per liter on all

coating containers. Alternatively, the coating manufacturer may include 

other container label information that enables the determination of 

compliance with the ROC content limits in Subsection B.1., use of which

has been approved in writing by the APCO.

 b. The manufacturer and repackager of solvents subject to this rule shall 

include on all containers the VOC content for solvents, as supplied, 

expressed in grams per liter. 

14. OSHA Standards for Spray Finishing Using Flammable and Combustible 

Materials: No person shall operate an automotive coating operation unless all 

provisions of California OSHA standards are met including, but not limited to 

CCR Title 8, Division 1, Chapter 4, Subchapter 7, Group 20 (Flammable 

Liquids), Article 137 (Spray Coating Operations).

 These standards are referenced because of the flammability hazard posed by 

acetone-based cleaners, which may be used to comply with provisions of this rule. 

In no event shall the APCD be liable to any person or business using these 

cleaners.

 

 

 

C. Exemptions 

 1. Any motor vehicle or mobile equipment coating operation which uses only handheld, nonrefillable aerosol coating cans, 16 ounces or less (NET WT), shall be 

exempt from this rule. 

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Deleted: ¶

Deleted: 13. Coatings Containing 

1,1,1-Trichloroethane: No person shall 

apply any coating to any motor vehicle, 

mobile equipment, or their parts or 

components, if that coating contains 

1,1,1-trichloroethane.

Deleted: 14. Pretreatment Wash 

Primers: No person shall apply a 

pretreatment wash primer if the amount 

used has exceeded 10 percent of the total 

volume of all undercoats applied, 

averaged on a monthly (calendar) basis.

Deleted: 15. Adhesion Promoters: No 

person shall use, sell, or offer for sale 

adhesion promoters as a topcoat.

Deleted: ¶

Deleted: 

Deleted: 10/96
Nov. 11, 2008 Proposed Amended Rule ATTACHMENT 3 Rule 74.18: 7 

 

2. This rule does not apply to any aerosol coatings that are in compliance with

regulations and requirements adopted by the California Air Resources Board

(California Code of Regulation, Title 17, Subchapter 8.5, Section 94522).

 

3. This rule shall not apply to any automotive coating that is sold, supplied, or 

offered for sale in 0.5 fluid ounce or smaller containers intended to be used by the 

general public to repair tiny surface imperfections.

 4. With prior written approval of the APCO, the requirements of Subsection B.12, 

Spray Booths and Prep Stations, shall not apply to the coating of motor vehicle(s) 

which due to shape or size, cannot reasonably be contained in any available 

substitute spray booth. A person wishing to qualify for this exemption must 

comply with the following requirements: 

 a. A written petition must be submitted to the APCO stating the motor 

vehicle(s) to be coated, the size of the substitute spray booth available, the 

physical size of the motor vehicle(s) (i.e. length, width, and height), 

number of motor vehicle(s) to be coated, estimated volume of coating 

used, and the ROC content, , and lead content of each coating used. 

 b. The coatings used shall not contain any lead with the exception of weldthru primers. 

 c. If the APCO grants written approval, then such approval shall: 

 1) Be valid only for the coating operation and coatings specified in 

the petition,

 2) Contain limits on coating volume,

 3) and may contain a time limit not to exceed one year. 

 5. The requirements of Subsection B.12, Spray Booths and Prep Stations, shall not 

apply to the application of: 

 a. Any undercoat that does not contain lead, and is: 

 1) Limited to one major panel or 

 2) Applied to an interior part of a motor vehicle, where that part can 

only be coated while the motor vehicle is immobilized. 

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Hanging: 1"

Deleted: 2. Subsection B.4, which 

specifies the coating application transfer 

efficiency, shall not apply to coatings 

applied from hand-held, nonrefillable 

aerosol cans.

Deleted: 3. Subsection B.8.b.2, which 

specifies the ROC composite partial 

pressure of solvents in spray gun washing 

equipment, shall not apply to the testing 

of such equipment if performed in 

accordance with the test method in 

Subsection E.7.

Deleted: on a case by case basis

Deleted: chromium content

Deleted: or chromium,

Deleted: .

Deleted: .

Deleted: C

Deleted: chromium or

Deleted: 

Deleted: 10/96
Nov. 11, 2008 Proposed Amended Rule ATTACHMENT 3 Rule 74.18: 8 

 b. Any weld-thru primer. 

 c. Any coating that does not contain lead and is applied to a motor vehicle 

engine compartment or a mating assembly of engine and suspension 

components. 

 6. The requirements of B.4 (Transfer Efficiency), and B.12 (Spray Booths) shall not 

apply to mobile automotive touch-up coating operations provided that: 

 a. Application is done using either a paint brush or an air brush with a cup 

that holds no more than 4 ounces of paint, and 

 b. Coatings applied contain no lead . 

 7. The requirements of B.12 (Spray Booths) shall not apply to touch-up coating of 

vehicles, mobile equipment, or their associated parts or components using a paint 

brush or roller. 

8. This rule shall not apply to a “Clean Air Solvent,” which has been certified in 

writing by the South Coast AQMD, and which is defined in SCAQMD Rule 102.

9. This rule shall not apply to the possession or use of any non-aerosol glass cleaner 

as long as the cleaner is used solely for cleaning glass and is identified as a glass 

cleaner on its applicator. Only those cleaners identified by the manufacturer on

container labels, sales, and technical literature as formulated for the cleaning of 

glass shall qualify for this exemption.

10. This rule shall not apply to any agricultural sources of air pollution, which means 

a source of air pollution or a group of sources used in the production of crops, or 

the raising of fowl or animals located on contiguous property under common 

ownership or control.

11. Color coatings manufactured prior to January 1, 2009, which have an ROC 

content greater than 420 grams per liter but less than 760 grams per liter, may be 

possessed, sold, supplied, offered for sale, or applied until July 1, 2009.

12. The solvent cleaning ROC content requirement in Subsection B.8.c. shall not 

apply to any person using a surface preparation cleaner, predesignated as exempt

in an approved compliance plan, which is used to remove dust, grease, wax, or 

any other contaminant from a surface prior to sanding provided all the following 

requirements have been met:

 a. Prior written approval of the APCO has been obtained on a Low-Usage 

Exempt Surface Preparation Cleaner Compliance Plan that has all of the 

following information:

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Deleted: or chromium

Deleted: or chromium

Deleted: of B.4 (Transfer Efficiency), 

and

Deleted: Group II Vehicles/

Deleted: M

Deleted: 

Deleted: 10/96
Nov. 11, 2008 Proposed Amended Rule ATTACHMENT 3 Rule 74.18: 9 

 1) List of all exempt surface preparation cleaners to be used including 

Name of Product, Product Number, Product Manufacturer and 

Container Sizes.

 2) Description of label or sticker to be placed on each container, 

which designates it as a low-use exempt surface preparation

cleaner. All such labeled cleaners shall be listed in the plan 

inventory to qualify for exempt status.

 3) The MSDS or Product Data Sheet for each exempt surface 

preparation cleaner that provides VOC information that can be 

used to calculate pounds of VOC per container. An aerosol 

cleaner shall be assumed to be 100 percent by weight VOC unless

it contains an exempt VOC as defined by VCAPCD Rule 2, 

Exempt Organic Compounds.

 4). Name of Vendor for each exempt surface preparation cleaner.

 b. Total usage of all exempt surface preparation cleaners shall be limited so 

that total VOC emissions do not exceed 130 pounds per calendar year per 

stationary source based solely on purchase records for that year with no 

emission credit for any waste solvent generation.

 c. The VOC content of non-aerosol cleaners shall not exceed 6.51 pounds of 

VOC per gallon.

 d. Wipe cleaning solvents shall be dispensed so that containers are closed 

except when dispensing solvent or replenishing solvent supply.

13. The provisions of Subsection B.13, Labeling Requirements, shall not apply to any 

coating manufactured prior to July 1, 2008, provided that the relevant date of 

manufacture or date code information is submitted to APCD upon request by 

district personnel.

D. Recordkeeping Requirements 

 1. Any person subject to this rule shall: 

 a. Maintain and have available at all times, on site, and make available to 

District personnel upon request, a current list of in-house coatings and 

cleaning solvents that provides all of the data necessary to evaluate 

compliance, including the following information for each coating and 

cleaning solvent, as applicable: 

 1) Material name, product ID and product manufacturer. 

 2) Mix ratio of components used specific to each coating.

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Deleted: (including specialty coatings)

Deleted: coating

Deleted: Coating

Deleted: ,

Deleted: catalyst and reducer used

Deleted: 

Deleted: 10/96
Nov. 11, 2008 Proposed Amended Rule ATTACHMENT 3 Rule 74.18: 10 

 3) ROC content of coating as applied (less water and less exempt 

organic compounds), and ROC content for each cleaning solvent.

 4) Coating category from Subsection B.1 that corresponds with each 

coating used, and whether a material is a coating or cleaning 

solvent.

 5) Whether or not a coating contains any lead, if that coating is 

applied outside of a spray booth or prep station.

 6) VOC Regulatory of each coating used, as documented by a current 

manufacturer’s data sheet.

 7) VOC Actual of each cleaning solvent used, as documented by a 

current manufacturer’s data sheet.

 

 

 

 

 

 b. Maintain monthly purchase records showing all coatings and cleaning 

solvents purchased for that month, available upon request by APCD 

personnel, that have the following information:

 1) For each coating, the coating category from Subsection B.1;

 2) Product manufacturer and product number; and

 3) Volume of product purchased including container size and quantity

of containers purchased.

 c. Maintain monthly records or manifests of the amount cleaning solvent 

recycled or disposed of. All hazardous waste must be disposed of in a 

manner that complies with all local, state, and federal regulations.

 

 

 

 

 

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Deleted: s

Deleted: , B.2 or B.10

Deleted: chromium or 

Deleted: b. Maintain records which 

show on a daily basis the following 

information:

Deleted: 1) Coating identification and 

mix ratio of components used in each 

coating or quantity of each component 

used.¶

Deleted: 2) Quantity of each coating 

(including each specialty coating) 

applied. This quantity need not include 

toners that are added for color matching 

after preparation of the initial weighed 

color batch.

Deleted: 3) Type of vehicle coated 

(Group I or II)¶

Deleted: 4) For coatings applied 

outside of a Spray Booth or Prep Station, 

list major panel coated or interior part of 

immobilized vehicle coated.

Deleted: 2. Any person subject to the 

requirements of this rule shall have the 

manufacturer's specification sheets of 

solvents used for substrate surface 

cleaning and application equipment 

cleanup available for review and shall 

maintain records which show on a 

monthly basis, the following for each 

solvent:

Deleted: a. Identification of each 

solvent and its use.

Deleted: b. ROC content of solvent, in 

grams per liter

Deleted: c. Volume of solvent used. 

If purchase records are used to determine 

the amount of solvents used, then records 

and manifests of the amounts of solvents 

disposed of or sent to a recycler must also 

be maintained.

Deleted: 3. Any person producing 

utility bodies must keep records of the 

number of utility bodies coated each day.

Deleted: 

Deleted: 10/96
Nov. 11, 2008 Proposed Amended Rule ATTACHMENT 3 Rule 74.18: 11 

2. Any person using an emission control system pursuant to Subsection B.3 as a 

means of complying with this rule shall maintain daily records of key system 

operating and maintenance procedures which will demonstrate continuous 

operation and compliance of the emission control device during periods of TOC 

emission producing activities. Key system operating parameters are those 

necessary to ensure compliance with subsection B.3 including, but not limited to,

temperatures, pressure drops, and air flow rates. 

3. All records shall be retained for a minimum of two years from the date of each 

entry and shall be made available to District personnel upon request. 

E. Test Methods

The following test methods are incorporated by reference herein, and shall be used to test 

emission sources subject to the provisions of this rule. A source is in violation of this 

rule if any measurement by any of the listed applicable test methods exceeds any 

standard of this rule.

 1. ROC Content of Coatings or Solvents: Coating ROC content shall be determined 

using EPA Method 24 (40 CFR Part 60 Appendix A, “Determination of Volatile 

Matter Content, Water Content, Density, Volume Solids, and Weight Solids of 

Surface Coatings”). Compliance with the prohibition of sale (Subsection B.6) 

shall be determined by measuring the ROC content of each and every component 

of a coating or coating system which has been reduced using the manufacturer's 

recommended type and maximum amount of reducer.

2. Exempt Organic Compound Content of Coatings: The exempt organic compound 

content of coatings or solvents shall be determined using ASTM Method D6133-

02, Standard Test Method for Acetone, p-Chlorobenzotrifluoride, Methyl Acetate, 

or t-Butyl Acetate Content of Solventborne and Waterborne Paints, Coatings, 

Resins, and Raw Materials by Direct Injection into a Chromatograph. Exempt 

organic compound content, other than as determined above, shall be determined 

by using CARB Method 432, “Determination of Dichloromethane and 1,1,1-

Trichloroethane in Paints and Coatings” (September 12, 1998); CARB Method 

422, “Determination of Volatile Organic Compounds in Emissions from 

Stationary Sources” (January 22, 1987); or South Coast AQMD Method 303-91, 

“Determination of Exempt Compounds” (February 1993). 

3. The measurement of acid content of pretreatment coatings shall be done in 

accordance with ASTM Method D 1613-03 , Standard Test Method for Acidity in 

Volatile Solvents, and Chemical Intermediates Used in Paint, Varnish, Lacquer, 

and Related Products. 

4. The measurement of the metal and silicon content of metallic/iridescent coatings 

shall be determined by Method 311 (Determination of Percent Metal in Metallic 

Formatted: Indent: Left: 0",

Hanging: 0.5"

Deleted: 4.

Deleted: such as

Deleted: s

Deleted: 5.

Deleted: D4457-85

Deleted: Compliance with the 

prohibition of sale (Subsection B.6) shall 

be determined by measuring the ROC 

content of each and every component of a 

coating or coating system which has been 

reduced using the manufacturer's 

recommended type and maximum amount 

of reducer.

Deleted: 2.

Deleted: wash primers

Deleted: 85

Deleted: (modified)

Deleted: 3.

Deleted: 

Deleted: 10/96
Nov. 11, 2008 Proposed Amended Rule ATTACHMENT 3 Rule 74.18: 12 

Coatings by Spectrographic Method) of the SCAQMD "Laboratory Method of 

Analysis for Enforcement Samples." 

 

 

5. The presence of hexavalent chromium in a coating shall be determined using 

ASTM Method D 3718-85a. 

6. The presence of lead or cadmium in a coating shall be determined using ASTM 

Method D 3335-85a.

7. Control and Capture Efficiency: The capture and control efficiency of emission 

control systems shall be determined as specified in U.S. EPA’s “Guidelines for 

Determining Capture Efficiency,” (January 9, 1995) and 40 CFR 51, Appendix 

M, Methods 204-204f as applicable. Total organic emissions of emission control 

systems shall be determined using EPA Method 25 or 25A. A source is in 

violation if the measured overall TOC capture and control efficiency of the 

emission control system is less than 85 percent.

8. Transfer Efficiency: Spray equipment transfer efficiency shall be determined by 

using South Coast AQMD’s “Spray Equipment Transfer Efficiency Test 

Procedure for Equipment User,” (May 24, 1989).

9. HVLP Equivalency: Spray Equipment HVLP equivalency shall be determined by 

using South Coast AQMD’s “Guidelines for Demonstrating Equivalency with 

District Approved Transfer Efficient Spray Guns”(September 26, 2002). 

10. Alternative Test Methods: The use of other test methods may be used in place of 

test methods specified in this rule if they are determined to be equivalent or better 

and approved, in writing, by the Air Pollution Control Officer, CARB and U.S. 

EPA.

F. Violations 

 Failure to comply with any provision of this rule shall constitute a violation of this rule. 

G. Definitions: 

 

1. "Adhesion Promoter": Any coating, which is labeled and formulated to be 

applied to uncoated plastic surfaces to facilitate bonding of subsequent coatings, 

and on which a subsequent coating is applied.

Deleted: 4. Transfer Efficiency shall 

be determined in accordance with the 

South Coast Air Quality Management 

District method entitled "Spray 

Equipment Transfer Efficiency Test 

Procedure for Equipment Users" or a 

method which shall:¶

¶

a. Be modeled after the test method 

described in the EPA document 

(EPA/600/2-88/-26b) "Development of 

Proposed Standard Test Method for Spray 

Painting Transfer Efficiency."¶

¶

b. Simulate the transfer efficiency 

achieved during the actual operations.¶

¶

c. Have received written approval by 

the APCO.¶

¶

Deleted: 6. ROC composite pressure 

of a solvent shall be calculated using a 

widely accepted published source such 

as: Boublik, T., V. Fried and E. Hala, 

"The Vapor Pressure of Pure Substances," 

Elsevier Scientific Publishing Co., New 

York (1973), Perry's Chemical Engineer's 

Handbook, McGraw-Hill Book 

Company, CRC Handbook of Chemistry 

and Physics, Chemical Rubber Publishing 

Company (1986-87), and Lange's 

Handbook of Chemistry, John A. Dean, 

editor, McGraw-Hill Book Company 

(1985). The true vapor pressure of a 

component in a solvent mix may be 

determined by ASTM Method D2879-86. 

The ROC composite pressure of a solvent 

mix consisting entirely of ROC may be 

determined by ASTM Method D2879-86.¶

Deleted: 7. The active and passive 

solvent losses from spray gun cleaning 

systems shall be determined using South 

Coast Air Quality Management District's 

"General Test Method for Determining 

Solvent Losses from Spray Gun Cleaning 

Systems" dated October 3, 1989. The test 

solvent for this determination shall be any 

lacquer thinner with a minimum vapor 

pressure of 105 mm Hg at 20 oC. The 

Deleted: 8.

Deleted: 9.

Deleted: 1. "Active Solvent Losses": 

The emissions during all steps of a spray 

gun equipment cleaning operation, 

expressed in units of grams of solvent 

loss per cleaning cycle.

Deleted: 2.

Deleted: A specialty coating formulated 

to be applied over an OEM topcoat or 

other hard finish as a midcoat prior to the 

application of a topcoat.

Deleted: 

Deleted: 10/96

... [1]
Nov. 11, 2008 Proposed Amended Rule ATTACHMENT 3 Rule 74.18: 13 

2. “Aerosol Coating Product”: Any pressurized coating product containing 

pigments or resins that dispenses product ingredients by means of a propellant, 

and is packaged in a disposable can for hand-held application.

 

3. “Associated Parts and Components”: Structures, devices, pieces, modules, 

sections, assemblies, subassemblies, or elements of motor vehicles or mobile 

equipment which may or may not be attached to motor vehicles or mobile 

equipment at the time of coating the structure, device, piece, module, section, 

assembly, subassembly, or element. Associated parts and components do not 

include circuit boards.

4. “Automotive Coating”: Any coating or coating component used or recommended 

for use in motor vehicle or mobile equipment coating, refinishing, service, 

maintenance, repair, restoration, or modification, except metal plating activities. 

Any reference to automotive refinishing or automotive coating made by a person 

on the container or in product literature constitutes a recommendation for use in 

motor vehicle or mobile equipment refinishing.

5. “Automotive Coating Component”: Any portion of a coating, including, but not 

limited to, a reducer or thinner, toner, hardener, and additive, which is 

recommended by any person to distributors or end users for use in an automotive 

coating, or which is supplied for or used in an automotive coating. The raw 

materials used to produce the components are not considered automotive coating 

components.

 

 

6. “CARB”: The abbreviation for the California Air Resources Board.

7. “Cleaning Operations”: The removal of uncured adhesives, inks or coatings, or 

contaminants, including but not limited to, dirt, soil, or grease, from motor 

vehicles, mobile equipment, associated parts and components, parts, products, 

tools, machinery, equipment, or general work areas. Cleaning operations include, 

but are not limited to, substrate surface preparation and spray gun cleaning and

exclude janitorial cleaning.

8. “Clear Coating”: Any coating that contains no color-producing pigments and is 

labeled and formulated for application over a color or clear coating.

 9. "Coating": A material which is applied to a surface and forms a solid film in 

order to beautify, preserve, repair, or protect such a surface.

Formatted: Indent: Left: 0",

Hanging: 1"

Deleted: 3. "Antiglare/Safety 

Coating": A coating formulated to 

eliminate glare for safety purposes on 

interior surfaces of a vehicle and which 

shows a reflectance of 25 or less on a 60o

gloss meter.

Deleted: 4. "Basecoat/Clearcoat 

System": A multistage topcoat system 

composed of a pigmented basecoat 

portion and two transparent clearcoat 

portions. Basecoat/clearcoat multistage 

topcoat systems' ROC content shall be 

calculated according to the following 

formula:¶

¶

ROCbc + 2 ROCcc ¶

ROC Tbc/cc = _________________¶

 3 ¶

Where:¶

¶

ROC Tbc/cc = the average of the sum 

of the ROC content as applied in the 

basecoat (bc) and clearcoat (cc) system.¶

¶

ROCbc = the actual ROC content as 

applied of any given basecoat.¶

¶

2 ROCcc = two times the actual ROC 

content as applied of any given clearcoat.¶

¶

Deleted: 5. "Camouflage Coating": A 

coating applied on motor vehicles to 

conceal such vehicles from detection.¶

Deleted: 6. "Catalyst": A substance 

whose presence initiates the reaction 

between chemical compounds.

Deleted: 7. "Cleanup": The removal 

of uncured coating from any surface. ¶

¶

8. "Color Match": The ability of a 

repair coating to blend into an existing 

coating so that color difference is not 

visible.¶

Deleted: A liquid, liquefiable or mastic 

composition which is converted to a solid 

protective, decorative, or functional 

adherent film after application as a thin 

layer.

Deleted: 

Deleted: 10/96
Nov. 11, 2008 Proposed Amended Rule ATTACHMENT 3 Rule 74.18: 14 

10. “Color Coating”: Any pigmented coating, excluding adhesion promoters, 

primers, and multi-color coatings, that requires a subsequent clear coating and 

which is applied over a primer, adhesion promoter, or color coating. Color 

coatings include metallic/iridescent color coatings.

11. “Cured Coating, Cured Ink, or Cured Adhesive”: is a coating, ink, or adhesive, 

which is dry to the touch.

12. "Electrophoretic Dip": A coating application method where the coating is applied 

by dipping the component into a coating bath and an electrical potential 

difference exists between the component and the bath. 

13. "Electrostatic Spray Application": Any method of spray application of coatings 

where an electrostatic attraction is created between the part to be coated and the 

paint particles.

14. “Emission Control System”: Any combination of capture systems and control 

devices used to reduce Total Organic Compound (TOC) emissions from 

automotive coating operations.

15. “EPA”: The abbreviation for the United States Environmental Protection 

Agency.

16. "Exempt Organic Compounds": As defined in Rule 2 of these Rules, except that 

tert-butyl acetate shall be considered an exempt organic compound when 

determining compliance with this Rule. 

17. "Grams of ROC per Liter of Coating Less Water and Exempt Organic 

Compounds"(VOC Regulatory): The weight of ROC per combined volume of 

ROC and coating solids and can be calculated by the following equation: 

 Grams of ROC per Liter Ws - Ww - Wes

 of Coating Less Water = _____________

 and Less Exempt Organic Compounds Vm - Vw - Ves

 Where: Ws = Weight of volatile compounds (grams) 

 Ww = Weight of water (grams) 

 Wes = Weight of exempt organic compounds (grams) 

 Vm = Volume of material (liters) 

 Vw = Volume of water (liters) 

 Ves = Volume of exempt organic compounds (liters) 

18. "Grams of ROC per Liter of Material"(VOC Actual): The weight of ROC per 

volume of material and can be calculated by the following equation: 

Formatted: Indent: Left: 0",

Hanging: 1"

Deleted: 10

Deleted: 11

Deleted: A sufficient charging of 

atomized paint droplets to cause 

deposition principally by electrostatic 

attraction. This application shall be 

operated at a minimum of 60 KV power.

Deleted: 12

Deleted: 13

Deleted: 14

Deleted: 

Deleted: 10/96
Nov. 11, 2008 Proposed Amended Rule ATTACHMENT 3 Rule 74.18: 15 

 Grams of ROC per Liter Ws - Ww - Wes

 of Material = _____________ 

 Vm

 Where: Ws = Weight of volatile compounds (grams) 

 Ww = Weight of water (grams) 

 Wes = Weight of exempt organic compounds (grams) 

 Vm = Volume of material (liters) 

 

 

 

 19. "High-Volume, Low-Pressure Application (HVLP)": Equipment used to apply 

coatings by means of a spray gun designed to be operated and operated between 

0.1 and 10 psig air pressure measured dynamically at the center of the air cap and 

at the air horns.

 20. "Immobilized": A vehicle is immobilized or incapable of being moved, only 

when an engine or wheel has been removed so that the engine or wheel 

compartments can be coated. 

 21. "Interior Motor Vehicle Part": Any interior part of the motor vehicle, including 

but not limited to the engine, engine compartment, wheel well, suspension 

component or passenger compartment, that is not a "major panel" or exterior 

motor vehicle panel. 

22. “Janitorial Cleaning”: The cleaning of building or facility components including, 

but not limited to, floors, ceilings, walls, windows, doors, stairs, bathrooms, 

furnishings, and exterior of office equipment, and excludes the cleaning of work 

areas, where manufacturing, coating, or repair activity is performed.

23. "Major Panel": Any exterior motor vehicle panel including but not limited to the 

roof, hood, doors, quarter panel, fender, bumper, soft bumper cover, deck lid, 

luggage lid, rear body panel, cowl top panel, rocker panel, and front header panel. 

24. "Metallic/Iridescent Topcoat": Any topcoat which contains more than 5 g/l (.042 

lb/gal) of iridescent particles, composed of metal as metallic particles or silicon as 

mica particles, as applied, where such particles are visible in the dried film. 

25. “Mobile Automotive Coating Touch-Up Operations:” A portable automotive 

coating operation that is limited to small repair jobs where application of coatings 

may only be performed with a paint brush or an air brush with a cup that holds no 

more than 4 ounces of paint.

Formatted: Indent: Left: 0",

Hanging: 1"

Formatted: Indent: Left: 0",

Hanging: 1"

Deleted: 15. "Group I Vehicles": 

These include passenger cars, large/heavy 

duty truck cabs and chassis, light and 

medium duty trucks and vans, and 

motorcycles.¶

¶

16. "Group II Vehicles/Equipment": 

These include public transit buses, mobile 

equipment, or military tanks or other 

tracked military vehicles.¶

Deleted: 17. "Gun Washer": 

Electrically or pneumatically operated 

system that is designed to clean spray 

application equipment while enclosed. A 

gun washer may also be considered a gun 

cleaning system that consists of spraying 

solvent into an enclosed container using a 

snug fitting.¶

Deleted: 18. "Hand Application 

Methods": The application of coatings by 

nonmechanical hand-held equipment 

including but not limited to paint brushes, 

hand rollers, caulking guns, trowels, 

spatulas, syringe daubers, rags, and 

sponges.

Deleted: Spray equipment which uses a 

high volume of air delivered at pressures 

between 0.1 and 10 psig measured at the 

spray gun air cap and which operates at a 

maximum fluid delivery pressure of 50 

psig

Deleted: 22. "Large Production/Utility 

Bodies": The production of utility bodies 

at a rate greater than 20 vehicles per day.¶

¶

Deleted: 25

Deleted: 

Deleted: 10/96
Nov. 11, 2008 Proposed Amended Rule ATTACHMENT 3 Rule 74.18: 16 

26. "Mobile Equipment": Any equipment which may be drawn or is capable of being 

driven on rails or a roadway, including, but not limited to, trains, railcars, truck 

bodies, truck trailers, camper shells, mobile cranes, forklifts, bulldozers, tractors, 

concrete mixers, street cleaners, golf carts, all terrain vehicles, implements of 

husbandry. and hauling equipment used inside and around airports, docks, depots, 

and industrial and commercial plants, utility bodies, or implements of husbandry 

or agriculture. 

27. "Motor Vehicle": A vehicle which is self-propelled vehicle, including but not 

limited to, cars, trucks, buses, golf carts, vans, motorcycles, tanks, or armored 

personnel carriers.. 

 28. “Multi-Color Coating”: Any coating that exhibits more than one color in 

the dried film after a single application, is packaged in a single container, and 

hides surface defects on areas of heavy use, and which is applied over a primer or 

adhesion promoter.

 

29. "Prep Station": Any spraying area that meets the requirements for a "Limited 

Spraying Area" from Section 45.207 of the Uniform Fire Code and that prevents 

the escape to the atmosphere of overspray particulate using properly maintained 

filters and positive mechanical ventilation. 

30. "Pretreatment Coating": Any coating which contains a minimum of 0.5% acid, 

by weight, and not more than 16% solids by weight, and is necessary to provide 

surface etching and is labeled and formulated for application directly to bare 

metal surfaces to provide corrosion resistance and adhesion. 

31. "Primer": Any coating, which is labeled and formulated for application to a 

substrate to provide 1) a bond between the substrate and subsequent coats, 2) 

corrosion resistance, 3) a smooth substrate surface, or 4) resistance to penetration 

of subsequent coats, and on which a subsequent coating is applied. Primers may 

be pigmented.

32. "Primer Sealer": Any coating, which is labeled and formulated for application 

prior to the application of a color coating for the purpose of color uniformity, or

to promote the ability of an undercoat to resist penetration by the color coating. 

 

33. "Reactive Organic Compound (ROC)": As defined in Rule 2 of these rules. The 

term "volatile organic compound" (VOC) is equivalent to ROC. 

Deleted: 26

Deleted: but excluding

Deleted: 27

Deleted: and which is physically 

capable of being driven on a highway

Deleted: 28. "Multistage Topcoat": A 

topcoat system which consists of a 

basecoat/clear coat system (2 stage) or 

basecoat/midcoat/clear coat system (3 

stage).¶

¶

Deleted: 29. "Operating Cycle": An 

operating cycle consists of all steps 

carried out during a cleaning operation.

Deleted: 30. "Passive Solvent 

Losses": The passive solvent losses are 

the emissions from spray gun cleaning 

equipment when the equipment sits idle 

between cleaning cycles and are a result 

of natural evaporation from the 

equipment.

Deleted: 31

Deleted: 32

Deleted: Wash Primer

Deleted: applied

Deleted: 33

Deleted: Any coating applied prior to 

the application of a topcoat for the 

purpose of corrosion resistance and 

adhesion of the topcoat.

Deleted: 34

Deleted: applied

Deleted: topcoat

Deleted: adhesion of the topcoat,

Deleted: and

Deleted: topcoat

Deleted: 35. "Primer Surfacer": Any 

coating applied prior to the application of 

a topcoat for the purpose of corrosion 

resistance, adhesion of the topcoat, and 

which promotes a uniform surface by 

filling in surface imperfections.

Deleted: 36. ROC Composite Partial 

Pressure": The sum of the partial 

pressures of the compounds defined as 

ROCs. ROC composite partial pressure is 

calculated as follows:¶

¶

Deleted: 37

Deleted: 

Deleted: 10/96

... [2]
Nov. 11, 2008 Proposed Amended Rule ATTACHMENT 3 Rule 74.18: 17 

34. "Reducer": Any volatile liquid used to reduce the viscosity of the coating. This 

liquid may be solvents, diluents or mixtures of both.

35. “Single-Stage Coating”: Any pigmented coating, excluding primers and multicolor coatings, labeled and formulated for application, without a subsequent clear 

coat. Single-stage coatings include both single-stage metallic/iridescent coatings

and single-stage nonmetallic or non-iridescent coatings.

 

36. “Solvent”: An ROC-containing material used to perform cleaning operations.

37. “Spot Repair”: The repair of an area on a motor vehicle, piece of mobile 

equipment, or associated parts or components of less than 1 square foot.

38. "Spray Booth": Any power ventilated structure of varying dimensions and 

construction provided to enclose or accommodate a spraying operation and which 

meets the Uniform Fire Code. A spray booth shall confine and limit, by dry or 

wet filtration, the escape to the atmosphere of overspray particulate matter. 

 

 

39. “Temporary Protective Coating”: Any coating which is labeled and formulated 

for the purpose of temporarily protecting areas from overspray or mechanical 

damage.

40. "Transfer Efficiency": The ratio of the weight of coating solids which adhere to 

the object being coated to the weight amount of coating solids used in the 

application process, expressed as a percentage.

41. “Truck Bed Liner Coating”: Any coating, excluding clear, color, mult-color, and 

single stage coatings, labeled and formulated for application to a truck bed to 

protect it from surface abrasion.

42. “Underbody Coating” Any coating labeled and formulated for the application to 

wheel wells, the inside of door panels or fenders, the underside of a trunk or hood, 

or the underside of the motor vehicle.

43. “Uniform Finish Coating”: Any coating labeled and formulated for application to 

the area around a spot repair for the purpose of blending a repaired area’s color or 

clear coat to match the appearance of an adjacent area’s existing coating.

44. “VOC”: The term “volatile organic compound” or VOC is equivalent to ROC.

Formatted: Indent: Left: 0",

Hanging: 1"

Deleted: 38

Deleted: 39. "Small Production/Utility 

Bodies": The production of utility bodies 

at a rate of 20 vehicles per day or less.¶

¶

Deleted: 40. "Specialty Coatings": 

Coatings which are necessary due to 

unusual and uncommon job performance 

requirements. These coatings include, 

but are not limited to, weld-thru primers, 

adhesion promoters, uniform finish 

blenders, elastomeric materials, gloss 

flatteners, bright metal trim repair, 

antiglare/safety coatings, impact resistant 

coatings, rubberized asphaltic underbody 

coatings, water hold-out coatings, and 

multicolor coatings that exhibit more than 

one color when applied from a single 

container.

Deleted: 41

Deleted: 42. "Three-Stage Coating 

System": A multistage topcoat system 

composed of a pigmented basecoat 

portion, a semi-transparent midcoat 

portion, and two transparent clearcoat 

portions. Three-stage coating systems' 

ROC content shall be calculated 

according to the following formula:¶

ROCbc + ROCmc + 2 ROCcc¶

ROC T3-stage = 

_______________________¶

 4¶

Where:¶

ROC T3-stage = the average of the 

ROC content as applied in the basecoat 

(bc), midcoat (mc), and clearcoat (cc) 

system.¶

ROCbc = the ROC content as 

applied in the basecoat.¶

ROCmc = the ROC content as 

applied of any given midcoat.¶

2 ROCcc = two times the ROC 

content as applied of any given clearcoat.

Deleted: 43. "Topcoat": Any coating 

applied over a primer or an original OEM 

finish for the purpose of protection or 

appearance. For the purposes of this rule, 

either a basecoat/clearcoat system or 3-

stage coating system shall be considered 

jointly as a topcoat.

Deleted: 44

Deleted: 

Deleted: 10/96
Nov. 11, 2008 Proposed Amended Rule ATTACHMENT 3 Rule 74.18: 18 

45. “VOC Actual for Coatings”: This means the same as “Grams of ROC per Liter of 

Material,” which does not involve subtraction of water or exempt organic 

compounds as is performed in the VOC regulatory calculation.

46. “VOC Regulatory for Coatings”: This means the same as “Grams of ROC per 

Liter of Coating Less Water and Exempt Organic Compounds.” VOC and ROC 

have the same meaning.

 

 

47. “Water-Reducible Electrophoretic Brake Component Coating”: Any coating that 

is applied to vehicle brakes or brake components via an electrophoretic dip 

coating process in an aqueous solution.

 48. "Weld-Thru Primer": Any primer applied from an aerosol can, 16 ounces or less, 

to bare steel prior to welding that steel area. The purpose of the weld-thru primer 

is to inhibit corrosion in the weld area. 

Deleted: ¶

Deleted: 45. "Undercoat": Any 

pretreatment wash primer, primer, primer 

surfacer, or primer sealer.¶

Deleted: 46. "Utility Body": A 

special purpose compartment or unit that 

will be bolted, welded, or affixed onto an 

existing cab and chassis. The 

compartment may serve as storage for 

equipment of parts.¶

¶

Deleted: 47. "Water-Based Temporary 

Transit Coating": Any water-based 

coating that is intended to protect new 

motor vehicle finishes from certain forms 

of damage such as iron dust, soot, acid 

rain, and other airborne pollutants during 

transit and is removed prior to sale of the 

vehicle.

Deleted: 

Deleted: 10/96
Page 12: [1] Deleted Stan Cowen 9/11/2007 8:22:00 AM 

7. The active and passive solvent losses from spray gun cleaning systems shall be 

determined using South Coast Air Quality Management District's "General 

Test Method for Determining Solvent Losses from Spray Gun Cleaning 

Systems" dated October 3, 1989. The test solvent for this determination 

shall be any lacquer thinner with a minimum vapor pressure of 105 mm 

Hg at 20 oC. The minimum test temperature shall be 15 oC. 

Page 16: [2] Deleted Stan Cowen 2/27/2007 3:24:00 PM 

36. ROC Composite Partial Pressure": The sum of the partial pressures of the 

compounds defined as ROCs. ROC composite partial pressure is 

calculated as follows: 

( )( )

( ) PP

W VP

MW

W

MW

W

MW

W

MW

c

i i

i i

n

w

w

e

e e

n i

i i

n = 



 



 + 



 



 + 



 





=

= =

∑

∑ ∑

1

1 1

 Where: 

 Wi = Weight of the "i"th ROC 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 ROC compound, in g/(g-mole) 

 MWw = Molecular weight of water, in g/(g-mole) 

 MWe = Molecular weight of the "e"th exempt compound, in g/(g-mole) 

 PPc = ROC composite partial pressure at 20 C, in mm Hg 

 VPi = Vapor pressure of the "i"th ROC compound at 20 C, in mm Hg.