RULE 4603 SURFACE COATING OF METAL PARTS AND PRODUCTS, PLASTIC 

PARTS AND PRODUCTS, AND PLEASURE CRAFTS (Adopted April 11, 

1991; Amended September 19, 1991; Amended May 21, 1992; Amended 

December 17, 1992; Amended May 20, 1993; Amended September 21, 2000; 

Amended December 20, 2001; Amended May 18, 2006; Amended September 

20, 2007; Amended October 16, 2008; Amended September 17, 2009) 

1.0 Purpose 

The purpose of this rule is to limit the emissions of volatile organic compounds (VOC) 

from the coating of metal parts and products, large appliances parts or products, metal 

furniture, plastic parts and products, automotive/transportation and business machine 

plastic parts and products, and pleasure crafts, and from the organic solvent cleaning 

and storage and disposal of solvents and waste solvent materials associated with such 

coating. This rule also specifies the administrative and recordkeeping requirements and 

the test methods for determining the VOC content, the VOC emissions, the VOC 

capture efficiency, the acid content, the metallic or iridescent quality of coatings, and 

the VOC emissions from spray gun cleaning systems. 

2.0 Applicability 

The provisions of this rule shall apply to the surface coating of metal parts or products, 

large appliances parts or products, metal furniture, and plastic parts and products, 

automotive/transportation and business machine plastic parts and products, and pleasure 

crafts, and to the organic solvent cleaning, and the storage and disposal of all solvents 

and waste solvent materials associated with such coating. 

3.0 Definitions 

3.1 Aerospace Vehicles: the completed unit of any aircraft, helicopter, missile or 

space vehicle. 

3.2 Air Dried: a process whereby the coated object is cured or dried at ambient 

temperature or at a temperature below 194°F. 

3.3 Air Pollution Control Officer (APCO): as defined in Rule 1020 (Definitions). 

3.4 Antifoulant Coating: any coating applied to the underwater portion of a 

pleasure craft to prevent the attachment of biological organisms, and registered 

with the EPA as a pesticide under the Federal Insecticide, Fungicide, and 

Rodenticide Act (7 United States Code Section 136). 

3.5 Application Equipment: a device, including, but not limited to, a spray gun, 

brush, and roller, used to apply adhesives, coatings, or inks. 

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3.6 ARB: California Air Resources Board. 

3.7 ASTM: means ASTM International. 

3.8 Baked: a process whereby the coated object is heated above ambient 

temperature to a temperature at or above 194°F for the purpose of curing or 

drying. 

3.9 Basecoat/Clearcoat: a two-step topcoat system in which a highly pigmented, 

often metallic, basecoat is followed by a clearcoat, resulting in a finish with 

high gloss 

3.10 Bench Scale Project: a project (other than at a research and development 

facility) that is operated on a small scale, such as one capable of being located 

on a laboratory bench top. 

3.11 Brush Coating: the manual application of coatings using brushes or rollers. 

 3.12 Business Machine: a device that uses electronic or mechanical methods to 

process information, perform calculations, print or copy information or convert 

sound into electrical impulses for transmission, including devices listed in 

standard industrial classification numbers 3572, 3573, 3574, 3579, and 3661 

and photocopy machines, a subcategory of standard industrial classification 

number 3861. 

3.13 Camouflage Coating: a coating used primarily by the military to conceal 

equipment from detection. 

3.14 CFR: Code of Federal Regulations. 

3.15 Clearcoat: a transparent coating usually applied over a colored, opaque coat to 

improve gloss and provide protection to the colorcoat below. 

3.16 Clear Coating: a colorless coating which contains binders, but no pigment, and 

is formulated to form a transparent film. 

3.17 Coating: a material applied onto or impregnated into a substrate for protective, 

decorative, or functional purposes. Such materials include, but are not limited 

to, paints, varnishes, sealers, and stains. 

3.18 Coating of Plastic Parts of Automobiles and Trucks: the coating of any plastic 

part that is or shall be assembled with other parts to form an automobile or 

truck. 

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3.19 Coating of Plastic Parts of Business Machines: the coating of any plastic part 

that is or shall be assembled with other parts to form a business machine. 

3.20 Coils: metal sheets or strips which are rolled into coils for further industrial or 

commercial use. 

3.21 Continuous Coating: an enclosed coating system where spray nozzles coat 

metal parts and products as they are conveyed through the enclosure. Water 

wash zones control the inlet and outlet of the enclosure. Excess coating drains 

into a recirculation system. 

3.22 Cured Adhesive, Cured Coating, or Cured Ink: an adhesive, coating, or ink 

that is dry to the touch. 

3.23 Degreaser: a tank, tray, drum or other container in which objects to be cleaned 

are exposed to a solvent or solvent vapor in order to remove contaminants. The 

objects to be cleaned include, but are not limited to, parts, products, tools, 

machinery, and equipment. An enclosed spray application equipment cleaning 

system is not a degreaser. 

3.24 Dip Coating: the process in which a substrate is immersed in a solution (or 

dispersion) containing the coating material, and then withdrawn. 

3.25 Dissolver: an organic solvent that is added to an adhesive, coating, or ink in order 

to melt or to liquefy solid particles. 

3.26 Electric Dissipating Coating: a coating that rapidly dissipates a high-voltage 

electric charge. 

3.27 Electrodeposition: a dip coating application method where the paint solids are 

given an electrical charge which is then attracted to a substrate. 

3.28 Electrostatic Application: a method of spray application of coatings where an 

electrostatic potential is created between the parts to be coated and the paint 

particles. 

3.29 EMI/RFI Shielding: a coating used on electrical or electronic equipment to 

provide shielding against electromagnetic interference, radio frequency 

interference, or static discharge. 

3.30 EPA: United States Environmental Protection Agency. 

3.31 Exempt Organic Compounds: all organic compounds not classified as volatile 

organic compounds (VOC), as listed in Rule 1020 (Definitions). 

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 3.32 Extreme High Gloss Coating: any coating which achieves at least 95% 

reflectance on a 60 degree gloss meter when tested by ASTM D-523-89. 

3.33 Extreme Performance Coating: a coating used on a metal surface where the 

coated surface is, in its intended use, exposed to any of the following: 

3.33.1 Repeated heavy abrasion, including mechanical wear and repeated 

scrubbing with industrial grade solvents, cleaners, or abrasive scouring 

agents; or 

3.33.2 Unprotected shipboard conditions; or 

3.33.3 Temperatures consistently in excess of 250°F; or 

3.33.4 Chronic exposure to corrosive, caustic or acidic agents, chemicals, 

chemical fumes, chemical mixtures or solutions. 

3.34 Flow Coating: a coating application system, with no air supplied to the nozzle, 

where paint flows over the part and the excess coating drains back into the 

collection system. 

 3.35 Fog Coating: a coating that is applied to a plastic part for the purpose of color 

matching without masking in a molded-in texture. A fog coat shall be applied to 

a thickness of more than 0.5 mils of coating solids. 

 

 3.36 Finish Primer/Surfacer: a coating applied with a wet film thickness of less than 

10 mils or more prior to the application of a topcoat for purposes of providing 

corrosion resistance, adhesion of subsequent coatings, or moisture barrier, or 

promoting a uniform surface necessary for filling in surface imperfections. 

3.37 Grams of VOC per Liter of Coating Applied, Excluding Water and Exempt 

Compounds: the weight of VOC per combined volume of VOC and coating 

solids and can be calculated by the following equation: 

Grams of VOC per Liter of 

Coating Applied Excluding = Ws - Ww - Wec

Water and Exempt Compounds Vm - Vw - Vec 

Where: 

Ws = weight of volatile compounds, in grams 

Ww = weight of water, in grams 

Wec = weight of exempt compounds, in grams 

Vm = volume of material, in liters 

Vw = volume of water, in liters 

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Vec = volume of exempt compounds, in liters 

3.38 Grams of VOC per liter of Material: the weight of VOC per volume of material 

and can be calculated by the following equation: 

Grams of VOC per Liter of Material = Ws - Ww - Wec

 Vm 

Where: 

Ws = weight of volatile compounds, in grams 

Ww = weight of water, in grams 

Wec = weight of exempt compounds, in grams 

Vm = volume of material, in liters 

3.39 Heat Resistant Coating: any coating, which during normal use, must withstand 

temperatures of at least 400°F. 

3.40 High Build Primer/Surfacer: a coating applied with a wet film thickness of 10 

mils or more, prior to the application of a topcoat, for purposes of providing 

corrosion resistance, adhesion or subsequent coatings, or a moisture barrier, or 

promoting a uniform surface necessary for filling in surface imperfections. 

3.41 High Gloss Coating: any coating which achieves at least 85% reflectance on a 

60 degree gloss meter when tested by ASTM Method D-523-89. 

3.42 High Performance Architectural Coating: a coating used to protect architectural 

subsections and which meets the requirements of the Architectural Aluminum 

Manufacturers Association publication number AAMA 605.2-1980. 

3.43 High Temperature Coating: any coating that is certified to withstand 

temperatures of at least 1,000°F for 24 hours. 

3.44 High-Volume, Low-Pressure (HVLP) Spray Equipment: equipment used to 

apply materials by means of a spray gun which is designed and intended to be 

operated, and which is operated, between 0.1 and 10.0 psig of air atomizing 

pressure, measured dynamically at the center of the air cap and the air horns. 

3.45 Large Appliance Part: any organic surface-coated metal lid, door, casing, or other 

interior or exterior metal part or accessory that is assembled to form a large 

appliance product. 

3.46 Large Appliance Product: any organic surface-coated metal range, microwave 

oven, refrigerator, freezer, washer, dryer, dishwasher, water heater, or trash 

compactor manufactured for household, commercial, or recreational use. 

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3.47 Light-Duty Truck: any truck having a manufacturer's maximum gross vehicle 

weight rating of under 6,001 pounds. 

3.48 Liquid Leak: a visible solvent leak from a container at a rate of more than three 

drops per minute, or a visible liquid mist. 

3.49 Magnet Wire: wire used in electromagnetic field application in electrical 

machinery and equipment such as transformers, motors, generators, and 

magnetic tape recorders. 

3.50 Maintenance Cleaning: the cleaning of tools, forms, molds, jigs, machinery, 

and equipment (except coating application equipment, ink application 

equipment, or adhesive application equipment), and the cleaning of work areas 

where maintenance or manufacturing occurs. 

3.51 Manufacturing Process: the process of making goods or articles by hand or by 

machine. 

3.52 Marine Vessel: any tugboat, tanker, freighter, passenger ship, barge, or other 

boat, ship, or watercraft. This includes both salt water and fresh water vessels. 

3.53 Mask Coating: a thin film coating applied through a template to coat a small 

portion of a substrate. 

3.54 Metal Containers or Closures: the interior or the exterior of formed metal cans, 

drums, pails, or crowns; or flat metal sheets which are intended to be formed 

into cans, drums, pails, lids, or crowns. 

3.55 Metal Furniture: includes, but is not limited to, the following types of products: 

household, office, institutional, laboratory, hospital, public building, 

restaurants, barber and beauty shop, and dental furniture, as well as components 

of these products. It also includes office and store fixtures, partitions, shelving, 

lockers, lamps, and lighting fixtures, and wastebaskets 

3.56 Metal Parts and Products: any component or complete unit fabricated from 

metal, except those subject to the coating provisions of other source specific 

rules. 

3.57 Metallic/iridescent Coating: any coating which contains more than 0.042 lb/gal 

or 5 grams/liter of metal or iridescent particles, as applied, where such particles 

are visible in the dried film. 

3.58 Military Specification Coating: a coating which has a formulation approved by 

the United States Military Agency for use on military equipment. 

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3.59 Mold Seal Coating: the initial coating applied to a mold to provide a smooth 

surface which, when coated with a mold release coating, prevents products from 

sticking to the mold. 

3.60 Motor Vehicle: a vehicle which is self-propelled and is a device by which any 

person or property may be propelled, moved or drawn upon a highway, 

excepting a device moved by human power or used exclusively upon stationary 

rails or tracks. 

3.61 Multi-Colored Coating: a coating which exhibits more than one color when 

applied, and which is packaged in a single container and applied in a single coat. 

3.62 Multi-Component Coating: a coating requiring the addition of a separate 

reactive resin, commonly known as a catalyst or hardener, before application to 

form an acceptable dry film. 

3.63 Non-Absorbent Container: a container made of non-porous material that does 

not allow the migration of solvents through it. 

3.64 Non-Atomized Solvent Flow: solvents in the form of a liquid stream without 

the introduction of any propellant. 

3.65 Non-Leaking Container: a container without liquid leak. 

3.66 Normal Business Hours: Monday through Friday, 8:00 am to 5:00 pm. 

3.67 One-Component Coating: a coating that is ready for application as it comes out 

of its container to form an acceptable dry film. A thinner, necessary to reduce 

the viscosity, is not considered a component. 

3.68 Optical Coating: a coating applied to optical lenses. 

3.69 Organic Solvent: the same as “Solvent.” 

3.70 Organic Solvent Cleaning: as defined in Rule 4663 (Organic Solvent Cleaning, 

Storage, and Disposal). 

3.71 Plastic Part: a piece made from a substance that has been formed from resin 

through the application of pressure or heat or both. 

3.72 Pleasure Craft: marine vessels which are manufactured or operated primarily for 

recreational purposes, or leased, rented, or chartered to a person or business for 

recreational purposes. The owner or operator of such vessel shall be 

responsible for certifying that the intended use is for recreational purposes. 

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3.73 Pleasure Craft Coating: any marine coating, except unsaturated polyester resin 

(fiberglass) coatings, applied by brush, spray, or roller, or other means to a 

pleasure craft. 

3.74 Polyester Resin Materials: materials including, but not limited to, unsaturated 

polyester resins such as isophthalic, orthophthalic, halogenated, biphenol-A, 

vinyl-ester, or furan resins, cross-linking agents, catalysts, gel coats, inhibitors, 

accelerators, promoters, and any other VOC containing materials in polyester 

resin coating operations. 

3.75 Polyester Resin Operations: methods used for the production or rework of 

products by mixing, pouring, hand-layup, impregnating, injecting, forming, 

winding, spraying, and/or curing unsaturated polyester resin materials with 

fiberglass, fillers, or any other reinforcement materials and associated cleanup. 

3.76 Pretreatment Coating or Pretreatment Wash Primer: any coating which contains 

no more than 12 percent solids by weight, and a minimum of one-half (0.5) 

percent acid by weight, is necessary to provide surface etching, and is applied 

directly to bare metal or fiberglass surfaces to provide corrosion resistance and 

adhesion. 

3.77 Propellant: any gas, including air, in a pressure container for expelling the 

contents when the pressure is released. 

3.78 Repair: recoating portions of previously coated product to cover mechanical 

damage to the coating following normal painting operations. 

3.79 Repair Cleaning: a solvent cleaning operation or activity carried out during a 

repair process. 

3.80 Repair Process: the process of returning a damaged object or an object not 

operating properly to good condition. 

3.81 Research and Development: a facility or portion thereof used to further the 

development of useful materials, devices, systems, or methods, including, but 

not limited to, design, development, and improvement of prototypes and 

processes. Research and development does not include the manufacturing 

process itself. 

3.82 Roll Coating: the application of coatings from a paint trough to a flat surface by 

a mechanical series of rollers. 

3.83 Rolling, Consecutive 365-Day Period: any given date plus the immediate, 

previous 364 days. 

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3.84 SCAQMD: South Coast Air Quality Management District. 

3.85 Scientific Instruments: instruments (including the components, assemblies, and 

subassemblies used in their manufacture) and associated accessories and 

reagents which are used for the detection, measurement, analysis, separation, 

synthesis, or sequencing of various compounds. 

3.86 Shock-Free Coating: a coating applied to electrical components to protect the 

user from electric shock. The coating has characteristics of having a low 

capacitance and high resistance, and being resistance to breaking down under a 

high voltage. 

3.87 Silicone Release: a coating which contains silicone resin and has as its primary 

function the release of food products from metal surfaces such as baking pans. 

3.88 Solar Absorbent Coating: a coating which has as its primary purpose the 

absorption of solar radiation. 

3.89 Solid Film Lubricant: a very thin coating consisting of a binder system containing 

as its chief pigment material one (1) or more of the following: molybdenum 

disulfide, graphite, polytetrafluoroethylene (PTFE) or other solids that act as a dry 

lubricant between closely-fitting surfaces. 

3.90 Solvent: as defined in Rule 4663 (Organic Solvent Cleaning, Storage, and 

Disposal). 

3.91 Solvent Flushing: the use of a solvent to remove uncured adhesives, uncured 

inks, uncured coatings, or contaminants from the internal surfaces and passages 

of equipment by flushing solvent, by a non-atomized solvent flow, through the 

equipment. 

3.92 Stationary Source: as defined in Rule 2201 (New and Modified Stationary 

Source Review Rule). 

3.93 Stencil Coating: a coating that is applied over a stencil to a plastic part at a 

thickness of 1 mil or less of coating solids. Stencil coat is most frequently 

letters, numbers, or decorative designs. 

3.94 Stripping: the use of solvent to remove material such as cured adhesives, cured 

inks, cured or dried paint, cured or dried paint residue or temporary protective 

coating. 

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3.95 Surface Preparation: the removal of contaminants from a surface prior to the 

application of coatings, inks, or adhesives or before proceeding to the next step 

of a manufacturing process. 

3.96 Transfer Efficiency: a ratio of the amount of coating solids adhering to the 

object being coated to the total amount of coating solids used in the application 

process, expressed as a percentage. 

3.97 Thinner: a solvent that is used to dilute coatings to reduce viscosity, color 

strength, and solids, or to modify drying conditions. 

3.98 Texture coating: a coating that is applied to a plastic part which, in its finished 

form, consists of discrete raised spots of the coating. 

3.99 Topcoat: any final coating applied to a substrate. Several layers of topcoat 

maybe applied in some cases. 

3.100 Touch Up: that portion of the coating operation which is incidental to the main 

coating process but necessary to cover minor imperfections or to achieve 

coverage as required. 

3.101 Vacuum Metalizing/Physical Vapor Deposition (PVD): a process whereby metal 

is vaporized and deposited on a substrate in a vacuum chamber. 

3.102 Viscosity Reducer: an organic solvent which is added to an adhesive, coating or 

ink to make it more fluid. 

3.103 Volatile Organic Compounds (VOC): as defined in Rule 1020 (Definitions). 

3.104 Waste Solvent Material: any solvent which may contain dirt, oil, metal 

particles, sludge, and/or waste products, or wiping material containing VOC 

including, but not limited to, paper, cloth, sponge, rag, or cotton swab used in 

organic solvent cleaning. 

3.105 Wipe Cleaning: a solvent cleaning activity performed by hand rubbing an 

absorbent material such as a rag, paper, sponge, brush, or cotton swab 

containing solvent. 

4.0 Exemptions 

4.1 Except for large appliance parts and products, metal furniture, plastic parts and 

products, automotive/transportation and business machine plastic parts and 

products, and pleasure craft coating operations subject to Section 5.4.1, Section 

5.5.1, Section 5.6.1, and Section 5.7.1, respectively, an operator at a given 

SJVUAPCD 4603-10 09/17/09
stationary source may use up to a total of 55 gallons of non-compliant coatings 

per rolling, consecutive 365-day period. All other provisions of the rule, 

including application methods and administrative requirements shall apply to the 

use of the non-compliant coatings. 

4.1.1 A non-compliant coating is a coating with VOC content, as applied, in 

excess of the applicable VOC content limits in Sections 5.1, or 5.2. 

4.1.2 The 55-gallon exemption limit is the total amount of non-compliant 

coatings, as applied, for all operations that would otherwise be subject to 

Section 5.1, or Section 5.2 VOC content limits. 

4.1.3 The 55-gallon exemption limit does not apply to non-compliant coatings 

used in a coating operation with an APCO-approved VOC emission 

control system that meets the requirements of Section 5.8. 

4.2 Effective until December 31, 2010, the requirements of this rule shall not apply 

to metal parts and products touch-up and repair coating operation. On and after 

January 1, 2011, touch and repair coating used on metal parts and products shall 

comply with the applicable VOC limit specified in Section 5.2 Table 1. 

4.3 Any source which is in full compliance with the provisions of this rule shall be 

exempt from otherwise applicable portions of Rule 4661 (Organic Solvents). 

4.4 The requirements of this rule shall not apply to the application of coatings to 

aircraft, aerospace vehicles, marine vessels, can, coils, and magnetic wire. 

4.5 The provisions of this rule shall not apply to an operation subject to the 

requirements of Rule 4602 (Motor Vehicle Assembly Coatings). 

4.6 The provisions of this rule shall not apply to an operation subject to the 

requirements of Rule 4612 (Motor Vehicle and Mobile Equipment Operations 

Phase II). 

4.7 The provisions of this rule shall not apply to polyester resin operations and the 

application of polyester resin materials to metal parts and products that are 

subject to Rule 4684 (Polyester Resin Operations). 

4.8 For plastic parts and products coating operations (except for 

automotive/transportation and business machine plastic parts as specified in 

Section 4.10), the VOC limits of Section 5.5 Table 3 and the solvent cleaning 

requirements of Section 5.10 shall not apply to the types of coatings and coating 

operations specified in Sections 4.8.1 through 4.8.9, provided the operator 

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complies with the work practice standards in Section 5.9 and coating application 

methods in Section 5.12 of this rule. 

 4.8.1 Touch-up and repair coatings. 

 4.8.2 Stencil coatings applied on clear or transparent substrates. 

 4.8.3 Clear or translucent coatings. 

 4.8.4 Coatings applied at a paint manufacturing facility while conducting 

performance tests on coatings. 

 4.8.5 Any individual coating category used in volumes less than 50 gallons in 

any one calendar year, if substitute compliance coatings are not 

available, and the total usage of all such coatings does not exceed 200 

gallons per calendar year, per stationary source. 

 4.8.6 Reflective coatings used on highway cones. 

 4.8.7 Mask coatings that are less than 0.5 millimeter thick (dried) and the area 

coated is less than 25 square inches. 

 4.8.8 Electro-Magnetic Interference (EMI)/Radio Frequency Interference 

(RFI) shielding coatings. 

 4.8.9 Heparin-bezalkonium chloride (HBAC)-containing coatings applied to 

medical devices, provided that the total usage of all such coatings does 

not exceed 100 gallons per calendar year, per stationary source. 

4.9 For plastic parts and products coating operations (except for 

automotive/transportation and business machine plastic parts as specified in 

Section 4.10), the coating application methods in Section 5.12 shall not apply to 

airbrush operations using five (5) gallons or less of coating per calendar year, 

provided the operator complies with the applicable VOC limits in Table 3, work 

practice standards in Section 5.9 and applicable recordkeeping requirement of 

Section 6.2. 

4.10 For automotive/transportation and business machine plastic parts and products 

coating operations, the VOC limits of Section 5.6 Table 4 and the solvent 

cleaning requirements of Section 5.10 shall not apply to the types of coatings 

and coating operations specified in Sections 4.10.1 through 4.10.8, provided the 

operator complies with the work practice standards in Section 5.9 and coating 

application methods in Section 5.12 of this rule. 

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 4.10.1 Texture Coatings. 

 4.10.2 Texture Topcoats. 

 4.10.3 Gloss Reducers. 

 4.10.4 Vacuum Metalizing Coatings. 

 4.10.5 Adhesion Primers. 

 4.10.6 Electrostatic Preparation Coatings. 

 

4.10.7 Resist Coatings. 

 4.10.8 Stencil Coatings. 

4.11 For pleasure craft surface coating operations, the application method in Section 

5.12 shall not apply to extreme gloss coating provided the operator complies 

with the extreme gloss coating VOC limit in Table 5 and the work practice 

standards in Section 5.9 of this rule. 

4.12 The provisions of this rule shall not apply to stripping of cured coatings, cured 

adhesives, and cured inks, except the stripping of such materials from spray 

application equipment. 

4.13 The VOC content limits of Table 6 shall not apply to the following applications: 

4.13.1 Cleaning of solar cells, laser hardware, scientific instruments, or high 

precision optics. 

4.13.2 Cleaning in laboratory tests and analyses, or bench scale or research 

and development projects. 

4.13.3 Cleaning of paper-based gaskets. 

4.13.4 Cleaning of clutch assemblies where rubber is bonded to metal by 

means of an adhesive. 

4.14 The VOC content limit of Table 6, Category C, shall not apply to the cleaning 

of application equipment used to apply coatings on satellites or to the cleaning of 

application equipment used to apply radiation effect coatings. 

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5.0 Requirements 

5.1 General Coating Limits for Metal Parts and Products, Except for Large 

Appliance Parts or Products, and Metal Furniture Subject to Section 5.4.1 

 Except as otherwise provided by this rule, no operator shall apply to any metal 

part or product any coating with a VOC content in excess of the following 

limits, expressed as grams of VOC per liter (or pounds per gallon) of coating, 

less water and exempt compounds, as applied. 

5.1.1 Baked Coating : 275 grams/liter (2.3 pounds/gallon) 

5.1.2 Air-Dried Coating: 340 grams/liter (2.8 pounds/gallon) 

5.1.3 VOC Content Limit for Dip coating of steel joists (SIC 3441), air-dried. 

5.1.3.1 340 grams of VOC/liter (2.8 pounds of VOC/gallon) for 

coatings with a viscosity, as applied, of more than 45.6 

centistokes at 78°F or an average dry-film thickness of greater 

than 2.0 mils; 

5.1.3.2 400 grams of VOC/liter (3.32 pounds of VOC/gallon) for 

coatings with a viscosity, as applied, of less than or equal to 

45.6 centistokes at 78°F and an average dry-film thickness of 

less than or equal to 2.0 mils. 

5.2 Specialty Coating for Metal Parts and Products, Except for Large Appliance 

Parts or Products, and Metal Furniture Subject to Section 5.4.1 

An operator subject to Section 5.2 shall not apply to any metal part or product 

any specialty coating with a VOC content in excess of the limits in Table 1. 

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Table 1 – VOC Content Limits for Specialty Coatings, except for Large Appliance Parts 

or Products, and Metal Furniture subject to Section 5.4.1 

Limits are expressed as grams of VOC /liter (or pounds of VOC/gallon) of coating, 

less water and less exempt compounds, as applied. 

Coating Type VOC Limit 

Baked Air-Dried 

Camouflage 360 (3.0) 420 (3.5) 

Extreme Performance 420 (3.5) Effective until 

December 31, 2010. 

360 (3.0) Effective on and 

after January 1, 

2011. 

420 (3.5) 

Heat Resistant 360 (3.0) 420 (3.5) 

Extreme High Gloss 360 (3.0) 420 (3.5) 

High Performance Architectural 420 (3.5) 420 (3.5) 

High Temperature 420 (3.5) 420 (3.5) 

Metallic Coating 360 (3.0) 420 (3.5) 

Pretreatment Coating 420 (3.5) 420 (3.5) 

Touch Up and Repair Coating 360 (3.0) Effective on and 

after January 1, 

2011. 

420 (3.5) Effective on and 

after January 1, 

2011. 

Silicone Release 420 (3.5) 420 (3.5) 

Solar Absorbent 360 (3.0) 420 (3.5) 

Solid Film Lubricant 880 (7.3) 880 (7.3) 

5.3 In lieu of complying with the applicable VOC content limits of Section 5.1, or 

Table 1, an operator may control emissions from coating operations with an 

APCO-approved VOC emission control system that meets the requirements of 

Section 5.8. 

5.4 Coating Limits for Large Appliance Parts or Products Coating Operation and 

Metal Furniture Coating Operation 

5.4.1 An operator whose total actual VOC emissions from all large appliance 

parts or products coating operations, or metal furniture coating 

operations, including related cleaning activities, at a stationary source are 

equal to or greater than three (3) tons of VOC per 12-month rolling 

period, before consideration of controls, shall not apply to any large 

appliance parts or products or metal furniture any coating with a VOC 

content in excess of the applicable limits in Table 2. In lieu of 

complying with the VOC content limits in Table 2, an operator may 

comply with Section 5.4.1.2. 

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5.4.1.1 An operator shall comply with the applicable recordkeeping 

requirements of Section 6.2 to demonstrate if the VOC emissions 

from all large appliance parts or products coating operations, or 

metal furniture coating operations, including related cleaning 

activities, are equal to or greater than three (3) tons of VOC per 

12-month rolling period. 

5.4.1.2 In lieu of complying with the VOC content limits in Table 2, an 

operator may operate a VOC control system that meets the 

applicable requirements of Section 5.8. 

5.4.2 An operator of large appliance parts or products coating operations, or 

metal furniture coating operations whose total actual VOC emissions 

from all large appliance parts or products coating operations, or metal 

furniture coating operations, including related cleaning activities, at a 

stationary source are less than three (3) tons of VOC per 12-month 

rolling period, before consideration of controls, shall comply with the 

applicable VOC content limits of coatings specified in Sections 5.1 and 

5.2. An operator shall comply with the applicable recordkeeping 

requirements of Section 6.2 to demonstrate if the VOC emissions from all 

large appliance parts or products coating operations, or metal furniture 

coating operations, including related cleaning activities are less than three 

(3) tons of VOC per 12-month rolling period. 

Table 2 - VOC Content Limits for Large Appliance Parts or Products, 

and Metal Furniture Coating Operations subject to Section 5.4.1 

Limits are expressed as grams of VOC/liter (or pounds of VOC/gallon) of coating, 

less water and less exempt compounds, as applied. 

Coating Type VOC Limit 

Baked Air-dried 

General, One Component 275 (2.3) 275 (2.3) 

General, Multi-Component 275 (2.3) 340 (2.8) 

Extreme High Gloss 360 (3.0) 340 (2.8) 

Extreme Performance 360 (3.0) 420 (3.5) 

Heat Resistant 360 (3.0) 420 (3.5) 

Metallic 420 (3.5) 420 (3.5) 

Pretreatment Coating 420 (3.5) 420 (3.5) 

Solar Absorbent 360 (3.0) 420 (3.5) 

5.5 Plastic Parts and Products Coating Operations (Except for 

Automotive/Transportation and Business Machine Plastic Parts and Products 

Coating Operations that are subject to Section 5.6) 

SJVUAPCD 4603-16 09/17/09
 On and after January 1, 2011, an operator of plastic parts and products coating 

operations, except for automotive/transportation and business machine plastic 

parts and products coating operations that are subject to Section 5.6, shall 

comply with the applicable requirements of Section 5.5.1 or Section 5.5.2. 

5.5.1 An operator whose total actual VOC emissions from all metal parts and 

products, plastic parts and products, automotive/transportation and 

business machine plastic parts and products, and pleasure craft coating 

operations, including related cleaning activities, at a stationary source are 

equal to or greater than 2.7 tons of VOC per 12-month rolling period, 

before consideration of controls, shall not apply to any plastic parts and 

products any coating with a VOC content in excess of the applicable 

limits in Table 3. 

5.5.1.1 An operator shall comply with the applicable recordkeeping 

requirements of Section 6.2 and calculate the VOC emission 

metal parts and products, plastic parts and products, 

automotive/transportation and business machine plastic parts 

and products, and pleasure craft coating operations, to 

demonstrate if the VOC emissions from all, including related 

cleaning activities, are equal to or greater than 2.7 tons of VOC 

per 12-month rolling period. 

5.5.1.2 In lieu of complying with the VOC content limits in Table 3, an 

operator may operate a VOC control system that meets the 

applicable requirements of Section 5.8. 

5.5.2 An operator of plastic parts and products coating operations whose total 

actual VOC emissions from all metal parts and products, plastic parts 

and products, automotive/transportation and business machine plastic 

parts and products, and pleasure craft coating operations, including 

related cleaning activities, at a stationary source are less than 2.7 tons of 

VOC per 12-month rolling period, before consideration of controls, are 

not subject to the coating limits in Table 3. However, the operator shall 

comply with the applicable recordkeeping requirements of Section 6.2 and 

calculate the VOC emission to demonstrate if the VOC emissions from all 

metal parts and products, plastic parts and products, 

automotive/transportation and business machine plastic parts and 

products, and pleasure craft coating operations, including related 

cleaning activities are less than 2.7 tons of VOC per 12-month rolling 

period. 

SJVUAPCD 4603-17 09/17/09
Table 3 - VOC Content Limits for Plastic Parts and Products Coating Operations Subject to 

Section 5.5.1, except for Automotive/Transportation and Business Machine Plastic Parts and 

Products that are subject to Section 5.6. 

Limits are expressed as grams of VOC/liter (or pounds of VOC/gallon) of coating, 

less water and less exempt compounds, as applied. 

Coating Type VOC Limit 

General One-Component 280 (2.3) 

General Multi-Component 420 (3.5) 

Electric Dissipating Coatings and Shock-Free Coatings 800(6.7) 

Extreme Performance 420 (3.5) for 2-pack coating 

Metallic 420 (3.5) 

Military Specification 340 (2.8) for 1 pack 

420 (3.5) for 2-pack coating 

Mold-Seal 760(6.3) 

Multi-colored Coatings 680 (5.7) 

Optical Coatings 800 (6.7) 

Vacuum-Metalizing 800 (6.7) 

 

5.6 Automotive/Transportation and Business Machine Plastic Parts and Products 

Coating Operations 

 On and after January 1, 2011, an operator of automotive/transportation and 

business machine plastic parts and products coating operations shall comply with 

the applicable requirements of Section 5.6.1 or Section 5.6.2. 

5.6.1 An operator whose total actual VOC emissions from all metal parts and 

products, plastic parts and products, automotive/transportation and 

business machine plastic parts and products, and pleasure craft coating 

operations, including related cleaning activities, at a stationary source are 

equal to or greater than 2.7 tons of VOC per 12-month rolling period, 

before consideration of controls, shall not apply to any 

automotive/transportation and business machine plastic parts and 

products any coating with a VOC content in excess of the applicable 

limits in Table 4. 

5.6.1.1 An operator shall comply with the applicable recordkeeping 

requirements of Section 6.2 calculate the VOC emission to 

demonstrate if the VOC emissions from all metal parts and 

products, plastic parts and products, automotive/transportation 

and business machine plastic parts and products, and pleasure 

craft coating operations, including related cleaning activities, 

are equal to or greater than 2.7 tons of VOC per 12-month rolling 

period. 

SJVUAPCD 4603-18 09/17/09
5.6.1.2 In lieu of complying with the VOC content limits in Table 3, an 

operator may operate a VOC control system that meets the 

applicable requirements of Section 5.8. 

5.6.2 An operator of automotive/transportation and business machine plastic 

parts and products coating operations whose total actual VOC emissions 

from all metal parts and products, plastic parts and products, 

automotive/transportation and business machine plastic parts and 

products, and pleasure craft coating operations, including related 

cleaning activities, at a stationary source are less than 2.7 tons of VOC 

per 12-month rolling period, before consideration of controls, are not 

subject to the coating limits in Table 4. However, the operator shall 

comply with the applicable recordkeeping requirements of Section 6.2 and 

calculate the VOC emission to demonstrate if the VOC emissions from all 

metal parts and products, plastic parts and products, 

automotive/transportation and business machine plastic parts and 

products, and pleasure craft coating operations, including related 

cleaning activities are less than 2.7 tons of VOC per 12-month rolling 

period. 

SJVUAPCD 4603-19 09/17/09
Table 4 - VOC Content Limits for Automotive/Transportation and Business Machine Plastic 

Parts and Products Coating Operations Subject to Section 5.6.1 

Limits are expressed as grams of VOC/liter (or pounds of VOC/gallon) of coating, 

less water and less exempt compounds, as applied. 

VOC Content Limit For Automotive/Transportation Plastic Parts and Products Coatings 

Coating Type VOC Limit 

I. High Baked Coatings – Interior and Exterior 

Flexible Primer 540 (4.5) 

Non-flexible Primer 420 (3.5) 

Basecoat 520 (4.3) 

Clearcoat 480 (4.0) 

Non-basecoat/clearcoat 520 (4.3) 

II. Low Bake/Air-Dried Coatings – Exterior Parts 

Primers 580 (4.8) 

Basecoat 600 (5.0) 

Clearcoat 540 (4.5) 

Non-basecoat/clearcoat 600 (5.0) 

III. Low Bake/Air-Dried Coatings – Interior parts 600 (5.0) 

IV. Touch-up and Repair Coatings 620 (5.2) 

VOC Content Limit For Business Machine Plastic Parts and Products Coatings 

Coating Type VOC Limit 

Primer 350 (2.9)

Topcoat 350 (2.9) 

Texture Coat 350 (2.9)

Fog Coat 260 (2.2)

Touch-up and Repair 350 (2.9)

5.7 Pleasure Craft Coating Operations 

 On and after January 1, 2011, an operator of pleasure craft coating operations 

shall comply with the applicable requirements of Section 5.7.1 or Section 5.7.2. 

5.7.1 An operator whose total actual VOC emissions from all metal parts and 

products, plastic parts and products, automotive/transportation and 

business machine plastic parts and products, and pleasure craft coating 

operations, including related cleaning activities, at a stationary source are 

equal to or greater than 2.7 tons of VOC per 12-month rolling period, 

before consideration of controls, shall not apply any coatings on pleasure 

crafts with a VOC content in excess of the applicable limits in Table 5. 

5.7.1.1 An operator shall comply with the applicable recordkeeping 

requirements of Section 6.2 to demonstrate if the VOC emissions 

from all metal parts and products, plastic parts and products, 

SJVUAPCD 4603-20 09/17/09
automotive/transportation and business machine plastic parts 

and products, and pleasure craft coating operations, including 

related cleaning activities, are equal to or greater than 2.7 tons of 

VOC per 12-month rolling period. 

5.7.1.2 In lieu of complying with the VOC content limits in Table 5, an 

operator may operate a VOC control system that meets the 

applicable requirements of Section 5.8. 

5.7.2 An operator of pleasure craft coating operations whose total actual VOC 

emissions from all metal parts and products, plastic parts and products, 

automotive/transportation and business machine plastic parts and 

products, and pleasure craft coating operations, including related 

cleaning activities, at a stationary source are less than 2.7 tons of VOC 

per 12-month rolling period, before consideration of controls, are not 

subject to the coating limits in Table 5. However, the operator shall 

comply with the applicable recordkeeping requirements of Section 6.2 

calculate the VOC emission to demonstrate if the VOC emissions from all 

metal parts and products, plastic parts and products, 

automotive/transportation and business machine plastic parts and 

products, and pleasure craft coating operations, including related 

cleaning activities are less than 2.7 tons of VOC per 12-month rolling 

period. 

Table 5 - VOC Content Limits for Pleasure Craft Coating Operations Subject to Section 5.7.1 

Limits are expressed as grams of VOC/liter (or pounds of VOC/gallon) of coating, 

less water and less exempt compounds, as applied. 

Coating Type VOC Limit 

Extreme High Gloss Topcoat 490 (4.1) 

High Gloss Topcoat 420 (3.5) 

Pretreatment Wash Primer 780 (6.5) 

Finish Primer Surfacer 420 (3.5) 

High Build Primer Surfacer 340 (2.8) 

Aluminum Substrate Antifoulant Coating 560 (4.7) 

Other Substrate Antifoulant Coating 330 (2.8) 

All other pleasure craft surface coatings for metal or plastic 420 (3.5) 

5.8 VOC Emission Control System Requirements 

In lieu of complying with applicable provisions of Sections 5.1, 5.2, 5.4, 5.5, 

5.6, 5.7, 5.10, or 5.12, an operator may use a VOC emission control system 

that controls emissions from the source operation and meets the requirements of 

Sections 5.8.1 through 5.8.4. 

SJVUAPCD 4603-21 09/17/09
5.8.1 The VOC emission control system shall be under District permit. 

5.8.2 The VOC emission control system shall comply with the requirements of 

Sections 5.8.3 and 5.8.4 during periods of emission-producing activities. 

5.8.3 The VOC emission control system shall be operated with an overall 

capture and control efficiency of at least 90 percent by weight as 

determined in Section 6.3. 

5.8.4 Use of a VOC emission control system shall not result in emissions in 

excess of those that would have been emitted had the operator complied 

with the applicable provisions of Sections 5.1, 5.2, 5.4, 5.5, 5.6, 5.7, 

5.10 or 5.12. 

5.8.4.1 The following equation shall be used to determine if the 

minimum required overall capture and control efficiency of an 

emission control system is at an equivalent or greater level of 

VOC reduction as would be achieved using compliant 

materials, equipment, or work practices, as stated in Section 

5.8. 

( )

( ) CE = 1 - VOC

VOC

 x 

1 - VOC / D

1 - VOC c / D

 x 100 LWc

LWn,

LWn, n,

Max LW c

⎛ Max Max

⎝

⎜ ⎞

⎠

⎟ ⎡

⎣

⎢ ⎤

⎦

⎥

Where: 

CE = Minimum Required Control Efficiency, percent 

VOCLWc = VOC Limit of Rule 4603, less water and less 

exempt compounds 

VOCLWn,Max = Maximum VOC content of coating (or solvent) 

used in conjunction with a control device, less 

water and less exempt compounds 

Dn,Max = Density of solvent, reducer, or thinner 

contained in the noncompliant coating (or 

cleaning solvent), containing the maximum 

VOC content of the multi-component (or 

cleaning solvent) 

Dc = Density of corresponding solvent, reducer, or 

thinner used in the compliant coating (or 

cleaning solvent) system = 880 gm/liter. 

SJVUAPCD 4603-22 09/17/09
5.9 Work Practice Standards 

5.9.1 An operator of large appliance parts and products, and metal furniture 

coating operations shall minimize VOC emissions by complying with the 

work practice standards specified in Sections 5.9.3 through 5.9.6. 

5.9.2 Effective on and after January 1, 2011, an operator of metal parts and 

products coating operations, plastic parts and products coating operations, 

automotive/transportation and business machine plastic parts and products 

coating operations, and pleasure craft coating operations shall minimize 

VOC emissions by complying with work practice standards specified in 

Sections 5.9.3 through 5.9.6. 

5.9.3 Store all VOC-containing coatings, thinners, cleaning materials, and waste 

materials in closed non-absorbent and non-leaking containers. The 

containers shall remain closed at all times, except when specifically in 

use. 

5.9.4 Close mixing vessels that contain VOC coatings and other materials, except 

when specifically in use. 

5.9.5 Minimize spills of any VOC-containing materials and clean up spills 

immediately. 

5.9.6 Convey VOC-containing materials in closed containers or pipes. 

5.10 Organic Solvent Cleaning Requirements 

5.10.1 An operator shall not use organic solvents for cleaning operations that 

exceed the VOC content limits specified in Table 6. 

5.10.2 An operator shall perform all solvent cleaning operations with cleaning 

material having VOC content of 25 g/L or less, unless such cleaning 

operations are performed within the control of an APCO-approved 

VOC emission control system that meets the requirements of Section 

5.8. 

SJVUAPCD 4603-23 09/17/09
Table 6 – VOC Content Limits for Organic Solvents Used in Cleaning Operations 

Limits are expressed as grams of VOC/liter (or pounds of VOC/gallon) of material 

Type of Solvent Cleaning Operation VOC Content Limit 

A. Product Cleaning During Manufacturing 

Process or Surface Preparation for Coating 

Application 

25 (0.21) 

B. Repair and Maintenance Cleaning 25 (0.21) 

C. Cleaning of Coating Application Equipment 25 (0.21) 

5.11 Solvent Storage and Disposal Requirements 

An operator shall store or dispose of fresh or spent solvents, waste solvent 

cleaning materials such as cloth, paper, etc, coatings, adhesives, catalysts, and 

thinners in closed, non-absorbent and non-leaking containers. The containers 

shall remain closed at all times except when depositing or removing the contents 

of the containers or when the container is empty. 

5.12 Application Equipment Requirements: An operator shall not use or operate any 

coating application equipment on any metal parts and products, large appliances 

parts and products, metal furniture, plastic parts and products, 

automotive/transportation and business machine plastic parts and products, and 

pleasure crafts subject to the provisions of this rule unless one of the following 

methods is used: 

5.12.1 Electrostatic application; 

5.12.2 Electrodeposition; 

5.12.3 High-Volume, Low-Pressure (HVLP) spray, 

5.12.3.1 High-Volume, Low-Pressure (HVLP) spray equipment shall 

be operated in accordance with the manufacturer's 

recommendations. 

5.12.3.2 For HVLP spray guns manufactured prior to January 1, 

1996, the end user shall demonstrate that the gun meets 

HVLP spray equipment standards. Satisfactory proof will 

be either in the form of manufacturer's published technical 

material or by a demonstration using a certified air pressure 

SJVUAPCD 4603-24 09/17/09
tip gauge, measuring the air atomizing pressure dynamically 

at the center of the air cap and at the air horns. 

5.12.3.3 A person shall not sell or offer for sale for use within the 

District any HVLP spray gun without a permanent marking 

denoting the maximum inlet air pressure in psig at which the 

gun will operate within the parameters specified in Section 

3.0. 

5.12.4 Flow coating; 

5.12.5 Roll coating; 

5.12.6 Dip coating; 

5.12.7 Brush coating; or 

5.12.8 Continuous coating; 

5.12.9 Any other coating application method which is demonstrated to the 

APCO to be capable of achieving at least 65 percent transfer 

efficiency. The transfer efficiency shall be determined in accordance 

with the SCAQMD method “Spray Equipment Transfer Efficiency Test 

Procedure for Equipment User,” May 24, 1989, as contained in 

Section 6.3.8. Prior written approval from the APCO shall be 

obtained for each coating application method to be used pursuant to 

Section 5.12.9. 

5.12.10 In lieu of compliance with Sections 5.12.1 through 5.12.9 an operator 

may control emissions from application equipment with a VOC 

emission control system that meets the requirements of Section 5.8. 

5.12 Prohibition of Specification 

No person shall solicit or require for use or specify the application of a coating 

subject to this rule if such use or application results in a violation of any of the 

provisions of this rule. The prohibition of this Section shall apply to all written 

or oral contracts under the terms of which any coating is to be applied to any 

metal part or product at any physical location within the District. 

SJVUAPCD 4603-25 09/17/09
6.0 Administrative Requirements 

6.1 Labeling Requirements 

6.1.1 Coating VOC Content 

Each container or accompanying data sheet of any coating subject to this 

rule shall display the maximum VOC content of the coating, as applied, 

and after any thinning as recommended by the manufacturer. VOC 

content shall be displayed as grams of VOC per liter of coating (less 

water and exempt compounds). VOC content displayed may be 

calculated using product formulation data, or may be determined using 

the test method in Section 6.3. For determination of compliance and 

enforcement of the limits specified in Section 5.0 of this rule, the VOC 

content of any coating determined to exceed its applicable limit through 

the use of either product formulation data or the test method in Section 

6.3.1 shall constitute a violation of this rule. 

6.1.2 Thinning Recommendations 

Each container or accompanying data sheet of any coating subject to this 

rule shall display a statement of the manufacturer's recommendation 

regarding thinning of the coating. This requirement shall not apply to 

the thinning of coatings with water. 

6.1.3 Solvent Compliance Statement Requirements 

Manufacturers of any solvents subject to this rule shall indicate on the 

solvent container, or on a separate product data sheet or material safety 

data sheet, the name of the solvent, manufacturer's name, the VOC 

content, and density of the solvent, as supplied. The VOC content shall 

be expressed in units of gm/liter or lb/gallon. 

6.2 Recordkeeping 

An operator subject to Section 5.0 or exempt by Sections 4.1, 4.8.5, 4.8.9 and 

4.9 shall comply with the following requirements: 

6.2.1 Maintain a current list of coatings and solvents in use which contains all 

of the coating data necessary to evaluate compliance, including the 

following information, as applicable: 

6.2.1.1 mix ratio of components used, 

SJVUAPCD 4603-26 09/17/09
6.2.1.2 VOC content and specific chemical constituents of coatings as 

applied, and 

6.2.1.3 VOC content and specific chemical constituents of solvents used 

for surface preparation and cleanup. 

6.2.2 Maintain daily records which include the following information: 

6.2.2.1 volume coating/solvent mix ratio, 

6.2.2.2 VOC content (lb/gal or grams/liter) and, for dip coating 

operations, viscosity (cSt) of coating, 

6.2.2.3 volume of each coating used (gallons), and 

6.2.2.4 quantity of cleanup solvent used (gallons). 

6.2.3 VOC Emission Control System Records 

An operator using a VOC emission control system pursuant to Section 

5.8 as a means of complying with this rule shall maintain records of key 

system operating parameters which will demonstrate continuous 

operation and compliance of the emission control system during periods 

of emission producing activities. Key system operating parameters are 

those necessary to ensure compliance with VOC limits. The parameters 

include, but are not limited to, temperatures, pressures, and flowrates. 

6.2.4 Consistent records may be kept in grams/liter and liters instead of 

pounds/gallon and gallons. An operator of a stationary source subject to 

this rule shall maintain such records on a daily basis. An operator that is 

subject to the exemption of Section 4.1 shall maintain usage records of 

non-compliant coatings on the days that such non-compliant coatings are 

used. 

6.2.5 The operator shall retain the records specified in Sections 6.2.1 through 

6.2.4, as applicable, on site for a period of five years, make the records 

available on site during normal business hours to the APCO, ARB, or 

EPA and submit the records to the APCO, ARB, or EPA upon request. 

SJVUAPCD 4603-27 09/17/09
6.3 Test Methods 

The following test methods shall be used to determine compliance with the 

provisions of this rule. Alternate test methods may be used provided they are 

approved by the APCO, ARB, and EPA. 

6.3.1 VOC content of coatings and solvents shall be analyzed by EPA Method 

24 and analysis of halogenated exempt compounds shall be analyzed by 

ARB Method 422. 

6.3.2 Emissions of VOC shall be measured by EPA Method 25, 25A, or 25B, 

as applicable, and analysis of halogenated exempt compounds shall be 

analyzed by ARB Method 422. 

6.3.3 The viscosity of coatings used for dip coating of steel joists as specified 

in Section 5.1.3 of this rule, shall be determined by using ASTM D5478-

98 or ASTM D5125-97. 

6.3.4 The quantification of coating as a metallic/iridescent topcoat shall be 

determined by SCAQMD Method 318 (Determination of Weight Percent 

of Elemental Metal in Coatings by X-ray Diffraction Method), July 

1996. 

6.3.5 Acid Content: Measurement of acid content of pre-treatment wash 

primers shall be conducted and reported in accordance with ASTM 

D1613-96, Standard Test Method for Acidity in Volatile Solvents and 

Chemical Intermediates Used in Paint, Varnish, Lacquer, and Related 

Products. 

6.3.6 Determination of emissions of VOC from spray gun cleaning systems 

shall be made using SCAQMD “General Method for Determining 

Solvent Losses from Spray Gun Cleaning Systems,” dated October 3, 

1989. 

6.3.7 Determination of Overall Capture and Control Efficiency of VOC 

Emission Control Systems shall be made using the following methods: 

6.3.7.1 The capture efficiency of a VOC emission control system’s 

collection device shall be determined according to EPA’s 

“Guidelines for Determining Capture Efficiency,” January 9, 

1995 and 40 CFR 51, Appendix M, Methods 204-204F, as 

applicable. 

SJVUAPCD 4603-28 09/17/09
 6.3.7.1.1 Capture Efficiency, in percent, is the ratio of the 

weight of VOC in the effluent stream entering the 

control device to the weight of VOC emitted from 

coating operations that are subject to this rule, both 

measured simultaneously, shall be calculated by the 

following equation: 

 Capture Efficiency (%) = (Wc ÷ We) x 100 

 Where: 

 Wc = weight of VOC entering the control device 

We = weight of VOC emitted 

6.3.7.2 The control efficiency of a VOC emission control system’s 

VOC control device shall be determined using EPA Methods 2, 

2A, or 2D for measuring flow rates and EPA Methods 25, 

25A, or 25B for measuring total gaseous organic concentrations 

at the inlet and outlet of the control device. EPA Method 18 or 

ARB Method 422 shall be used to determine the emissions of 

exempt compounds. 

6.3.7.2.1 Control Efficiency, in percent, is the ratio of the 

weight of VOC removed by the control device from 

the effluent stream entering the control device to the 

weight of VOC in the effluent stream entering the 

control device, both measured simultaneously, shall be 

calculated by the following equation: 

 Control Device Efficiency (%) = [(Wc-Wa) ÷ Wc] x 100 

 Where: 

 

Wc = weight of VOC entering the control device 

Wa = weight of VOC discharged from the control device 

SJVUAPCD 4603-29 09/17/09
6.3.7.3 For VOC emission control systems that consist of a single VOC 

emission collection device connected to a single VOC emission 

control device, the overall capture and control efficiency shall 

be calculated by using the following equation: 

CECapture and Control = [ CECapture x CEControl ] / 100 

Where: 

CECapture and Control = Overall Capture and Control Efficiency, in 

 percent 

CECapture = Capture Efficiency of the collection device, 

 in percent, as determined in Section 6.3.7.1 

CEControl = Control Efficiency of the control device, in 

 percent, as determined in Section 6.3.7.2. 

6.3.8 The transfer efficiency of alternative coating application methods pursuant 

to Section 5.12.9 shall be determined in accordance with the SCAQMD 

Method “Spray Equipment Transfer Efficiency Test Procedure for 

Equipment User,” May 24, 1989. 

6.4 Multiple Test Methods 

When more than one test method or set of test methods is specified for any 

testing, a violation of any requirement of this rule established by any one of the 

specified test methods or set of test methods shall constitute a violation of this 

rule. 

SJVUAPCD 4603-30 09/17/09