SAN JOAQUIN VALLEY UNIFIED AIR POLLUTION CONTROL DISTRICT 

RULE 4605 - AEROSPACE ASSEMBLY AND COMPONENT COATING OPERATIONS

(Adopted December 19, 1991)(Amended May 21, 1992; December 17, 1992; March 31, 1993; 

February 17, 1994; December 19, 1996; December 20, 2001; September 20, 2007) 

1.0 Purpose 

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

from aerospace coatings and adhesives, from the organic solvent cleaning, and the storage 

and disposal of solvents and waste solvent materials associated with the use of aerospace 

coatings and adhesives and to provide the administrative requirements for recording and 

measuring the emissions. 

2.0 Applicability 

This rule shall apply to the manufacturing, assembling, coating, masking, bonding, paint 

stripping, surface cleaning, service, and maintenance of aerospace components, the cleanup 

of equipment, and the storage and disposal of solvents and waste solvent materials 

associated with these operations. 

3.0 Definitions 

3.1 Adhesion Promoter: a coating applied to a substrate in a monomolecular thickness 

to promote wetting and form a chemical bond with the subsequently applied 

material. 

3.2 Adhesive: a substance that is used to bond one surface to another. 

3.3 Adhesive Bonding Primer: a coating applied in a very thin film to aerospace 

adhesive bond detail components for corrosion inhibition and adhesion. 

3.4 Aerosol Coating: a mixture of pigments, resins, and liquid and gaseous solvents and 

propellants packaged in a disposable container for hand-held application. 

3.5 Aerospace Component: any raw material, partial or completed fabricated part, 

assembly of parts, or completed unit of any aircraft, helicopter, missile, or space 

vehicle, including mockups and prototypes. 

3.6 Aerospace Material: any coating, primer, adhesive, sealant, maskant, lubricant, 

stripper or hand-wipe cleaning or clean-up solvent used during the manufacturing, 

assembly, refinishing, maintenance or service of an aerospace component. 

3.7 Antichafe Coating: a coating applied to areas of moving aerospace components 

which may rub during normal operation. 

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3.8 Anti-wicking Wire Coating: the outer coating of a wire which prevents fluid 

wicking into the insulation of the wire. 

3.9 APCO: as defined in Rule 1020 (Definitions). 

3.10 ARB: California Air Resources Board. 

3.11 ASTM: American Society for Testing and Materials. 

3.12 Barrier Coating: a coating applied in a thin film to fasteners to inhibit dissimilar 

metal corrosion and to prevent galling. 

3.13 Brush Coating: manual application of coatings using brushes and rollers. 

3.14 Chemical Milling: the removal of metal by chemical action of acids or alkalis. 

3.15 Clear Topcoat: a clear or semi-transparent coating applied over a primer for 

purposes such as appearance, identification, or protection. 

3.16 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. 

3.17 Commercial Exterior Aerodynamic Structure Primer: a primer utilized for the 

purpose of extended corrosion protection, which is only used on the exterior of 

passenger and cargo doors, supporting door structures, aerodynamic components, 

and structures of commercial aircraft which protrude from the fuselage, such as 

wings and attached components, control surfaces, horizontal stabilizer, vertical fins, 

wing-to-body fairings, antennae, landing gear and landing gear doors. 

3.18 Conformal Coating: a coating applied to electrical conductors and circuit boards to 

protect them against electrical discharge damage and/or corrosion. 

3.19 Composite Partial Pressure: the sum of the partial pressures of the VOC 

compounds in a solvent. The VOC composite partial pressure is calculated as 

follows: 

∑ ∑

∑

= =

=

+ +

= k

1

n

1i i

i

e

e

w

w

n

1i i

ii

c

MW

W

MW

W

MW

W

MW

))(VP(W

PP

e

Where: 

Wi = Weight of the “i”th VOC compound, in grams 

Ww = Weight of water, in grams 

We = Weight of exempt compound, in grams 

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MWi = Molecular weight of the “i”th VOC compound, 

 in grams per gram-mole 

MWw = Molecular weight of water, in grams per gram-mole 

MWe = Molecular weight of the “e”th exempt compound, 

 in grams per gram-mole 

PPc = VOC composite partial pressure at 20o

C (68oF), in mm Hg 

VPi = Vapor pressure of the “i”th VOC compound at 20oC (68oF), 

 in mm Hg 

3.20 Decorative Laminate Primer: an adhesive bonding primer which is applied to a 

substrate to enhance adhesion between the decorative laminate and the subsequently 

applied substrate, and is cured at a maximum temperature of 250°F. 

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

dispersion) containing the coating and then withdrawn. 

3.22 Dry Lubricative Coating: a coating consisting of lauric acid, cetyl alcohol, waxes, or 

other non-cross linked or resin-bound materials which act as a dry lubricant or 

protective coat. 

3.23 Electric-effect Coating: an electrically-conductive coating. 

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

an electrical charge which is then attracted to a substrate. 

3.25 Electronic Wire Coating: the outer electrical insulation coating applied to tape 

insulation of a wire specifically formulated to smooth and fill edges. 

3.26 Electrostatic Application: a sufficient charging or atomized paint droplets to cause 

deposition principally by electrostatic attraction. This application shall be operated at 

a minimum 60 KV power. 

3.27 EPA: United States Environmental Protection Agency. 

3.28 Epoxy Based Fuel Tank Coating: a coating which contains epoxy resin that is 

applied to integral fuel tank components of aircraft to protect the fuel tank from 

corrosion and the by-products of bacterial growth. 

3.29 Fastener Sealant: a sealant applied to a device used to join two or more parts 

together. 

3.30 Fire Resistant Coating - Civilian (interior): a cabin interior coating that passes 

Federal Aviation Administration standards using the Ohio State University Heat 

Release, Fire and Burn Tests. 

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3.31 Flight Test Coating: a coating applied to an aircraft prior to flight testing to protect 

the aircraft from corrosion and to provide required marking during flight test 

evaluation. 

3.32 Flow Coating: a coating application system with no air supplied to the nozzle and 

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

system. 

3.33 Fuel Tank Adhesive: an adhesive used to bond components continuously exposed to 

fuel and which must be compatible with and used with fuel tank coatings. 

3.34 Fuel Tank Coating: a coating applied to the interior of a fuel tank or areas of an 

aircraft that are continuously wetted by fuel to protect it from corrosion and/or 

bacterial growth. 

3.35 Grams of VOC per Liter of Coating, Less Water and Exempt Compounds: the 

weight of VOC content per combined volume of VOC and coating solids and can be 

calculated by the following equation: 

Grams of VOC per liter of 

coating, less water and = Ws - Ww - Wec 

exempt compounds Vm - Vw - Vec 

Where, 

Ws = weight of volatile compounds (grams) 

Ww = weight of water (grams) 

Wec = weight of exempt compounds (grams) 

Vm = volume of material (liters) 

Vw = volume of water (liters) 

Vec = volume of exempt compounds (liters) 

3.36 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 (grams) 

Ww = weight of water (grams) 

Wec = weight of exempt compounds (grams) 

Vm = volume of material (liters) 

3.37 Hand Application Methods: the application of coatings, sealants, or adhesives, by 

non-mechanical hand-held equipment including but not limited to paint brushes, 

hand rollers, caulking guns, trowels, spatulas, syringe daubers, rags and sponges. 

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3.38 High Temperature Coating: a coating that is certified to withstand temperatures of 

more than 350°F. 

3.39 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 at the air horns, measured dynamically at 

the center of the air cap and the air horns. 

3.40 Impact Resistant Coating: a flexible coating that protects aerospace components, 

such as aircraft landing gear, and landing gear compartments, and other surfaces 

subject to abrasive impacts from runway debris. 

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

drops per minute, or a visible liquid mist. 

3.42 Long Term Adhesive Bonding Primer (Metal to Structural Core Bonding): an 

adhesive bonding primer that has met the aircraft manufacturers’ required 

performance characteristics following 6000 hours testing, used for metal to 

structural core bonding, and with an adhesive that is specified to be cured at 

350oF ± 10°F. 

3.43 Maskant for Chemical Milling: a coating applied directly to an aerospace 

component to protect surface areas when chemical milling such component. 

3.44 Non-Absorbent Container: a container made of non-porous material that does not 

allow the migration of solvents through it. 

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

3.46 Non-Structural Adhesive: an adhesive that bonds non-load carrying aircraft 

component in non-critical applications. 

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

3.48 Optical Anti-Reflective Coating: a coating with a low reflectance in the infrared and 

visible wavelength range and is used for anti-reflection on or near optical and laser 

hardware. 

3.49 Organic Solvent: the same as “Solvent.” 

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

Storage, and Disposal). 

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3.51 Phosphate Ester Resistant Wire Ink Coating: a coating that is used for surface 

identification or mark on aerospace wire or cable and which inhibits the corrosion 

caused by contact with phosphate ester type hydraulic fluids. 

3.52 Pretreatment Coating: a coating which contains no more than 12 percent solids by 

weight, and at least one-half (0.5) percent acid, by weight, to provide surface 

etching, and is applied directly to metal surfaces to provide corrosion resistance, 

adhesion and ease of stripping. 

3.53 Primer: a coating applied directly to an aerospace component for purposes of 

corrosion prevention, protection from the environment, functional fluid resistance 

and adhesion of subsequent coatings, adhesives, or sealants. 

3.54 Radiation-Effect Coating: a coating which helps in the prevention of radar 

detection. 

3.55 Rain Erosion Resistant Coating: a coating that protects leading edges, flaps, 

stabilizers, and engine inlet lips against erosion caused by rain during flight. 

3.56 Remanufactured Aircraft Part: an aerospace component that is built as a spare 

part or replacement part subject to an existing commercial aircraft specification. 

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

mechanical series of rollers. 

3.58 Scale Inhibitor: a coating that is applied to the surface of a part prior to thermal 

processing to inhibit the formation of tenacious scale. 

3.59 SCAQMD: South Coast Air Quality Management District. 

3.60 Sealant: a viscous semisolid material that fills voids in order to seal out water, fuel, 

and other liquids and solids, and in some cases air movement, and is applied with a 

syringe, caulking gun, or spatula. 

3.61 Short Term Adhesive Bonding Primer: an adhesive bonding primer that has met 

the manufacturers’ required performance characteristics following 1000 hours 

testing, used for metal to metal and metal to structural core bonding, and with an 

adhesive which is specified to be cured at a temperature of 350o

F ± 10°F. 

3.62 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. 

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

Disposal). 

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3.64 Sonic and Acoustic Applications: the use of aerospace materials on aerospace 

components that are subject to mechanical vibration and/or sound wave 

cavitation. 

3.65 Space Vehicle Coating: a coating applied to vehicles designed to travel beyond 

earth's atmosphere. 

3.66 Stripper: a volatile liquid applied to remove a maskant for chemical processing, 

cured or dried paint, cured or dried paint residue or temporary protective coating. 

3.67 Structural Adhesive - Autoclavable: an adhesive used to bond load-carrying aircraft 

components and is cured by heat and pressure in an autoclave. 

3.68 Structural Adhesive - Nonautoclavable: an adhesive cured under ambient conditions 

and is used to bond load-carrying aircraft components or other critical functions, 

such as nonstructural bonding near engines. 

3.69 Surface Cleaning: any method of cleaning outside of a degreaser, including, but not 

limited to, wipe cleaning and equipment flushing. 

3.70 Temporary Protective Coating: a coating applied to an aerospace component to 

protect it from mechanical and environmental damage during manufacturing or 

shipping. 

3.71 Topcoat: a coating applied over a primer for purposes such as appearance, 

identification, or protection. 

3.72 Transfer Efficiency: the ratio of the weight or volume of coating solids adhering to 

the part being coated to the weight or volume of coating solids used in the 

application process, expressed as a percentage. 

3.73 Unicoat: a coating that is applied directly to an aerospace component for purposes 

of corrosion protection, environmental protection and functional fluid resistance that 

is not subsequently topcoated. A unicoat is used in lieu of the application of a 

primer and a topcoat. 

3.74 Volatile Organic Compounds (VOCs): as defined in Rule 1020 (Definitions). 

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

sludge, and/or waste products, or wiping material containing VOCs including, but 

not limited to, paper, cloth, sponge, rag, or cotton swab used in organic solvent 

cleaning. 

3.76 Wing Coating: a coating that is corrosion resistant and is resilient enough to 

withstand the flexing of wings. 

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3.77 Wire Prebonding Etchant: a non-additive surface treatment process to provide 

bondability of aerospace wire coatings to the underlying insulation layer. 

4.0 Exemptions 

4.1 Jet engine or rocket engine flushing operations using any solvent other than 

trichloroethylene are exempt from this rule. 

4.2 Except for the recordkeeping provisions of Sections 6.1.1 and 6.1.4, the 

requirements of Section 5.0 shall not apply to aerospace assembly and component 

coating operations using not more than four (4) gallons of products containing 

VOCs per day. Solvent-containing materials used in operations subject to Rule 

4662 (Organic Solvent Degreasing Operations), shall not be included in this 

determination. 

4.3 Except for the provisions of Section 6.0, Section 5.0 shall not apply to laboratories 

which apply coatings, solvents, and adhesives to test specimens for purpose of 

research, development, quality control, and testing for production-related operations. 

Any person claiming this exemption shall provide operational records, data and 

calculations, as determined by the APCO to be necessary, to substantiate this claim. 

4.4 The provisions of Section 5.1 of this rule shall not apply to: 

4.4.1 Coatings or aerosols with separate formulations that are used in volumes of 

less than one (1) gallon on any day or 20 gallons in any calendar year at an 

aerospace assembly and component coating stationary source, or 

4.4.2 Adhesives with separate formulations that are used in volumes of less than 

one half (0.5) gallon on any day or ten (10) gallons in any calendar year at an 

aerospace assembly and component coating stationary source. 

Any operator seeking to claim the exemption in Section 4.4 shall notify the APCO in 

writing that substitute compliant coatings are not available. 

4.5 The provisions of Section 5.5 shall not apply to the application of coatings that: 

4.5.1 Contain less than 20 grams of VOC per liter of coating less water and 

exempt compounds, or 

4.5.2 Are dispensed from hand-held aerosol cans. 

5.0 Requirements 

5.1 Aerospace Coatings and Adhesives: After the applicable effective date indicated in 

Table 1, an operator shall not apply to any aerospace component any coating, 

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aerosol or adhesive with a VOC content, less water and exempt compounds, as 

applied, in excess of the limits in Table 1. 

Table 1 – VOC Content Limits (Grams of VOC Per Liter of Coating, Less 

Water and Exempt Compound) 

Product (VOC Containing Material) VOC Content Limit in g/L 

Adhesion Promoter 850 

Adhesives 

Non-Structural 250 

Structural 

Autoclavable 50 

Nonautoclavable 850 

Adhesive Bonding Primers 

New Commercial Aircraft 250 

All Military Aircraft 805 

Remanufactured Commercial 

Aircraft Parts 

805 

Sonic and Acoustic Applications 805 

Long Term 250 

Short Term 250 

Antichafe Coatings 600 

Barrier Topcoat 420 

Clear Topcoat 520 

Conformal Coating 750 

Dry Lubricative Materials 

Fastener Manufacturing 120 

Nonfastener Manufacturing 675 

Electric/Radiation Effect Coatings 800 

Fastener Sealants 675 

Fire Resistant Coatings 

Civilian (Interior) 650 

Flight Test Coatings Used on 

Missiles or Single-Use Target Craft 420 

All others 600 

Fuel Tank Coatings 

General 420 

Epoxy 420 

Fuel Tank Adhesives 620 

High Temperature Coating 850 

Impact Resistant Coating 420 

Maskants - Chemical Milling 250 

Optical Anti-Reflective Coating 700 

Pretreatment Coatings 780 

Primers 

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Table 1 – VOC Content Limits (Grams of VOC Per Liter of Coating, Less 

Water and Exempt Compound) 

Product (VOC Containing Material) VOC Content Limit in g/L 

General 350 

Commercial Exterior Aerodynamic 

Structure 

350 

Rain Erosion Resistant Coating 800 

Scale Inhibitor 880 

Sealant 600 

Solid Film Lubricants 

Fastener Manufacturing 250 

Fastener Installation 880 

Nonfastener Manufacturing 880 

Space Vehicle Coatings 

Electrostatic Discharge Protection 800 

Other Space Vehicle Coatings 1000 

Adhesives 800 

Temporary Protective Coatings 250 

Topcoats 420 

Unicoats (Self Priming Topcoats) 420 

Wing Coating 750 

Wire Coatings 

Electronic 420 

Anti-Wicking 420 

Pre-Bonding Etching 420 

Phosphate Ester Resistant Ink 925 

5.2 Evaporative Loss Minimization: 

5.2.1 Surface Cleaning: No operator shall use a solvent for surface cleaning, 

clean-up, or jet engine or rocket engine gas path cleaning or flushing, not 

exempt under Section 4.0 of this rule, excluding stripping coatings or 

cleaning coating application equipment, unless: 

5.2.1.1 the solvent contains less than 200 grams of VOC per liter (1.67 

lb/gal) of material, as applied; or 

5.2.1.2 the VOC composite vapor pressure of the solvent is less than or 

equal to 45 mm Hg (0.87 psia) at a temperature of 68°F. 

5.2.2 Coating Application Equipment Cleaning 

An operator shall not use VOC-containing materials to clean spray 

equipment used for the application of coatings, adhesives, or ink, unless an 

enclosed system or equipment that is proven to be equally effective at 

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controlling emissions is used for cleaning. If an enclosed system is used, 

it must totally enclose spray guns, cups, nozzles, bowls, and other parts 

during washing, rinsing and draining procedures, and it must be used 

according to the manufacturer’s recommendations and must be closed 

when not in use. 

5.2.3 In lieu of compliance with Sections 5.2.1 or 5.2.2, an operator may control 

VOC emissions from surface cleaning operations or from cleaning coating 

application equipment with a VOC emission control system that meets the 

requirements of Section 5.6. 

5.3 Coating Strippers 

5.3.1 No operator shall use or specify for use within the District a coating stripper 

unless it contains less than 300 grams of VOC per liter (2.5 lb/gal), as 

applied, or unless it has a VOC composite vapor pressure of 9.5 mm Hg 

(0.18 psia) or less at 68°F. 

5.3.2 In lieu of compliance with Section 5.3.1, an operator may control 

emissions from coating stripper operations with a VOC emission control 

system that meets the requirements of Section 5.6. 

5.4 Storage and Disposal of VOC Containing Materials: 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. 

5.5 Application Equipment Requirements: No operator shall apply coatings subject to 

the provisions of this rule unless one (1) of the following methods is used: 

5.5.1 Electrostatic application; 

5.5.2 Electrodeposition; 

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

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

operated in accordance with the manufacturer's 

recommendations. 

5.5.3.2 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 

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demonstration using a certified air pressure tip gauge, measuring 

the air atomizing pressure dynamically at the center of the air cap 

and at the air horns. 

5.5.3.3 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. 

5.5.4 Flow coating; 

5.5.5 Roll coating; 

5.5.6 Dip coating; 

5.5.7 Brush coating. 

5.5.8 In lieu of compliance with Sections 5.5.1 through 5.5.7, an operator may 

control VOC emissions from application equipment with a VOC emission 

control system that meets the requirements of Section 5.6. 

5.6 VOC Emission Control System 

As an alternative to meeting the requirements of Sections 5.1, 5.2, 5.3, or 5.5, an 

operator may install a VOC emission control system provided that the VOC 

emission control system meets all of the following requirements: 

5.6.1 The VOC emission control system shall be approved by the APCO. 

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

Sections 5.6.3 through 5.6.5 during periods of emission-producing 

activities. 

5.6.3 The VOC control system’s VOC control device shall have a control 

efficiency of at least 95 percent, by weight. 

5.6.4 The VOC emission control system’s VOC collection device(s) shall have a 

capture efficiency of at least 90 percent by weight. 

5.6.5 In no case shall compliance through the use of a VOC emission control 

system result in VOC emissions in excess of the VOC emissions which 

would result from compliance with applicable provisions of Sections 5.1, 

5.2, 5.3, or 5.5. 

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5.6.6 The minimum required overall capture and control efficiency of an emission 

control system at which an equivalent or greater level of VOC reduction will 

be achieved shall be calculated by using the following equation: 

( )

( ) 100 x 

-1 VOC / D

-1 VOC / D

 x 

VOC

VOC -1 = CE

LWc c

LWn, n,

LWn,

LWc ⎥

⎦

⎤ ⎢

⎣

⎡

⎟

⎟

⎠

⎞

⎜

⎜

⎝

⎛ Max Max

Max

Where: 

CE = Minimum Required Overall Capture and Control 

Efficiency, percent 

VOCLWc = VOC Limit, less water and exempt compounds 

VOCLWn,Max = Maximum VOC content of noncompliant coating used in 

conjunction with a control device, less water and exempt 

compounds 

Dn,Max = Density of solvent, reducer, or thinner contained in the 

noncompliant coating, containing the maximum VOC 

content of the multi-component coating 

Dc = Density of corresponding solvent, reducer, or thinner 

used in the compliant coating system. 

5.7 Prohibition of Solicitation: No person shall solicit, specify, or require an operator to 

use any coating, solvent, spray equipment, or VOC emission control system that 

does not meet the limits or requirements of this rule. 

6.0 Administrative Requirements 

6.1 Recordkeeping 

6.1.1 An operator subject to the requirements of this rule shall have coating 

manufacturer's specifications, either listed on the coating container, product 

data sheet, or on Material Safety Data Sheets (MSDS), available for review 

and shall maintain daily records which show the following information as 

applicable: 

6.1.1.1 manufacturer name and type for each coating, solvent, thinner, 

reducer or stripper used, 

6.1.1.2 mix ratio, by volume, of components added to the original material 

prior to application, 

6.1.1.3 grams of VOC per liter of each coating, solvent, thinner, reducer or 

stripper, less water and exempt compounds, as applied, 

6.1.1.4 grams of VOC per liter of each solvent, thinner, reducer, or 

stripper, 

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6.1.1.5 volume and method of application of each coating, solvent, thinner, 

reducer or stripper applied, and 

6.1.1.6 vapor pressure of solvents used. 

6.1.2 An operator shall maintain records to support that the following coatings 

have been specified for their intended application. 

6.1.2.1 adhesion promoter. 

6.1.2.2 antichafe coating. 

6.1.2.3 electric/radiation effect. 

6.1.2.4 fuel tank adhesive. 

6.1.2.5 high temperature coating. 

6.1.2.6 impact resistant coating. 

6.1.2.7 optical anti-reflective coating. 

6.1.2.8 rain erosion resistant wing coating. 

6.1.3 An operator using a VOC emission control system pursuant to Section 5.6 as 

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

system operating parameters and maintenance procedures which will 

demonstrate continuous operation and compliance of the VOC emission 

control system during periods of emission-producing activities. Key system 

operating parameters are those necessary to ensure compliance with VOC 

limits. The parameters may include, but are not limited to, temperatures, 

pressures, and flow rates. 

6.1.4 An operator shall retain records for a minimum of five (5) 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. 

6.2 Test Methods 

6.2.1 Coating VOC content and solvent VOC content shall be determined using 

EPA Method 24 or its constituent methods. The VOC content of coatings 

containing exempt halogenated VOCs shall be determined by using the 

ARB Method 432 or SCAQMD Method 303 (Determination of Exempt 

Compounds). 

6.2.2 The solid content of pretreatment coatings shall be determined using EPA 

Method 24. The acid content of pretreatment coatings shall be determined 

using ASTM Method D1613-96. 

6.2.3 The test method for determining the fire resistance of an interior coating 

shall be Federal Aviation Administration-required Ohio State University 

Heat Release, Fire and Burn Tests. 

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6.2.4 The VOC composite vapor pressure of a blended solvent shall be determined 

by quantifying the amount of each organic compound in the blend using gas 

chromatographic analysis SCAQMD Test Method 308 (Quantitation of 

Compounds by Gas Chromatography) and by calculating the VOC 

composite vapor pressure of the solvent by summing the product of the 

vapor pressure of each pure component and its molar fraction. For the 

purpose of this calculation, the blend shall be assumed to be an ideal solution 

where Raoult's Law applies. The vapor pressure of each pure component 

shall be obtained from published reference manuals or handbooks. 

6.2.5 The VOC emissions from enclosed systems used to clean coating application 

equipment shall be determined by the manufacturer using the SCAQMD 

General Test Method for Determining Solvent Losses from Spray Gun 

Cleaning Systems. 

6.2.6 The control efficiency of a VOC emission control system’s control device(s) 

shall be determined using EPA Methods 2, 2A, 2C, or 2D for measuring 

flow rates and EPA Methods 25, 25A, or 25B for measuring the 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. 

6.2.7 The capture efficiency of a VOC emission control system’s collection 

device(s) 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, or any other method 

approved by EPA, ARB, and the APCO. 

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