SACRAMENTO METROPOLITAN AQMD RULES AND REGULATIONS 

 September 25, 2008 463-1 

RULE 463 WOOD PRODUCTS COATINGS 

(Adopted 09-05-96) 

(Amended 12-5-96, 7-23-98, 9-25-08)

INDEX

100 GENERAL 

101 PURPOSE 

102 APPLICABILITY 

103 SEVERABILITY 

110 EXEMPTIONS 

200 DEFINITIONS

201 AEROSOL-SPRAY CONTAINER 

202 AFFECTED POLLUTANT 

203 BINDERS 

204 CAPTURE EFFICIENCY 

205 CLEANUP MATERIAL 

206 CLEAR TOPCOAT 

207 CLOSED CONTAINER 

208 COATING 

209 CONTROL EFFICIENCY 

210 CONVERSION VARNISH 

211 DIP COAT 

212 ELECTROSTATIC APPLICATION 

213 EMISSIONS UNIT 

214 ENCLOSED GUN CLEANER 

215 EXEMPT COMPOUND 

216 FILLER 

217 FLOW COAT 

218 HIGH-SOLIDS STAINS 

219 HIGH-VOLUME, LOW-PRESSURE (HVLP) 

220 HISTORICAL REPRODUCTION COATING 

221 INK 

222 LOW-SOLIDS STAINS 

223 LOW-VOLUME, LOW-PRESSURE (LVLP) EQUIPMENT 

224 MAJOR STATIONARY SOURCE OF VOC 

225 MOLD-SEAL COATING 

226 MULTI-COLORED COATING 

227 NEW WOOD PRODUCT 

228 PIGMENTED COATINGS 

229 REACTIVE DILUENT 

230 REFINISHING OPERATION 

231 REPAIR COATING 

232 ROLL COATER 

233 SEALER 

234 STENCIL COATING 

235 STRIPPER 

236 SURFACE PREPARATION MATERIAL 

237 TONER 

238 TOUCH-UP COATING 

239 VOLATILE ORGANIC COMPOUND (VOC) 

240 VOLATILE ORGANIC COMPOUND COMPOSITE PARTIAL VAPOR PRESSURE 

241 WASH COAT 

242 WOOD PANEL 

243 WOOD PRODUCTS 

244 WOOD PRODUCT COATING APPLICATION OPERATIONS
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463-2 September 25, 2008 

300 STANDARDS

301 APPLICATION EQUIPMENT REQUIREMENTS 

302 VOC CONTENT OF COATINGS FOR NEW WOOD PRODUCTS 

303 VOC CONTENT OF COATINGS FOR REFINISHING, REPAIRING, PRESERVING, OR 

RESTORING WOOD PRODUCTS 

304 VOC CONTENT FOR STRIPPERS 

305 EMISSION CONTROL EQUIPMENT 

306 EMISSIONS AVERAGING PROVISIONS 

307 EMISSIONS AVERAGING PLAN 

308 REQUIREMENTS FOR SURFACE PREPARATION AND CLEANUP MATERIALS 

400 ADMINISTRATIVE REQUIREMENTS

401 LABELING REQUIREMENTS: VOC CONTENT 

402 CALCULATION FOR DETERMINING VOLATILE ORGANIC COMPOUND COMPOSITE 

PARTIAL VAPOR PRESSURE 

403 CALCULATION FOR DETERMINING WEIGHT OF VOC PER VOLUME OF COATING, 

LESS WATER AND LESS EXEMPT COMPOUNDS 

404 CALCULATION FOR DETERMINATION OF VOC CONTENT PER VOLUME OF 

MATERIAL 

405 CALCULATION FOR DETERMINATION OF POUNDS OF VOC PER POUND OF 

SOLIDS 

406 OPERATION AND MAINTENANCE PLAN 

 

500 MONITORING AND RECORDS

501 USAGE RECORDS 

502 DURATION OF RECORDS 

503 TEST METHODS 
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 September 25, 2008 463-3 

100 GENERAL

101 PURPOSE: To establish limits on the emission of volatile organic compounds (VOC) from 

coatings and strippers used on wood products, and from products used in surface preparation 

and cleanup. 

102 APPLICABILITY: This rule applies to any person who uses, manufactures, blends, sells, 

repackages, distributes, or specifies the use of wood products coatings, and/or strippers for 

use within the District. The requirements of Rule 441 - ORGANIC SOLVENTS shall not apply 

to operation subject to this rule. 

103 SEVERABILITY: If any section, subsection, sentence, clause, phrase, or portion of this rule 

is, for any reason, held invalid, unconstitutional, or unenforceable by any court of competent 

jurisdiction, such portion shall be deemed as a separate, distinct, and independent provision, 

and such holding shall not affect the validity of the remaining portions thereof. 

110 EXEMPTIONS:

110.1 Sources using less than 55 gallons per year, (singly or in any combination) of wood 

products coatings and/or strippers, are exempt from all provisions of this rule with the 

exception of Section 501 - USAGE RECORDS. 

110.2 Wood products coatings that are sold in non-refillable aerosol-spray containers. 

110.3 Coating operations for the purpose of manufacturing a finished wood panel intended 

for attachment to the inside walls of buildings, including, but not limited to, homes 

and office buildings, mobile homes, trailers, prefabricated buildings and similar 

structures; or a finished exterior wood siding intended for use in construction. 

110.4 Coating of architectural components or structures not coated in a shop environment, 

which are regulated by Rule 442 - Architectural Coatings. 

200 DEFINITIONS

201 AEROSOL-SPRAY CONTAINER: Any hand-held, pressurized, non-refillable container of 1 

liter (1.1 quarts) or less, where the contents are released when a valve on the container is 

depressed. 

202 AFFECTED POLLUTANT: Volatile organic compounds (VOC), as defined in Section 239. 

203 BINDERS: Non-volatile polymeric organic materials (resins) which form the surface film in 

coating applications. 

204 CAPTURE EFFICIENCY: Expressed in percent, capture efficiency is the ratio of the weight 

of the VOC in the effluent stream entering a control device to the weight of the VOC emitted 

from wood product coating operations, both measured simultaneously, and can be calculated 

by the following equation: 

Capture Efficiency = ×100

e

c

W

W

Where: Wc = Weight of VOC entering the control device 

We = Weight of VOC emitted 

205 CLEANUP MATERIAL: A VOC-containing material used to clean application equipment 

used in wood products coating operations. 

206 CLEAR TOPCOAT: A final coating which contains binders, but not opaque pigments, and is 

specifically formulated to form a transparent or translucent solid protective film. 

207 CLOSED CONTAINER: A container which has a cover where the cover meets with the main 
SACRAMENTO METROPOLITAN AQMD RULES AND REGULATIONS 

463-4 September 25, 2008 

body of the container without any gaps between the cover and the main body of the 

container. 

208 COATING: A material which is applied to a surface and which forms a film in order to 

beautify and/or protect such surface. "Coating" includes, but is not limited to, materials such 

as topcoats, stains, sealers, fillers, conversion varnish, pigmented coating, multicolored 

coating, moldseal coating, washcoat, and toner. 

209 CONTROL EFFICIENCY: Expressed in percent, control efficiency is the ratio of the weight 

of the 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. Control efficiency is calculated by the following equation: 

( ) Control Efficiency ×100 − =

c

c a

W

W W

Where: Wc = Weight of VOC entering the control device 

Wa = Weight of VOC discharged from the control device 

210 CONVERSION VARNISH: A coating comprised of a homogeneous (alkyd-amino resin) 

liquid which, when acid catalyzed and applied, hardens upon exposure to air or heat, by 

evaporation and polymerization, to form a continuous film that imparts protective or 

decorative properties to wood surfaces. When used as a combined sealer/topcoat system, 

conversion varnish shall not be subject to the VOC limit for sealers, as specified in section 

302. 

211 DIP COAT: A coating which is applied by dipping an object into a vat of coating material and 

allowing any excess coating material to drain off. 

212 ELECTROSTATIC APPLICATION: The electrical charging of atomized coating droplets for 

deposition by electrostatic attraction. 

213 EMISSIONS UNIT: An identifiable operation or piece of process equipment such as an 

article, machine, or other contrivance which controls, emits, may emit, or results in the 

emissions of any affected pollutant directly or as fugitive emissions. 

214 ENCLOSED GUN CLEANER:

214.1 A device that is used for the cleaning of spray guns, pots and hoses, that has an 

enclosed solvent container, is not open to the ambient air when in use, and has a 

mechanism to force the cleanup material through the gun while the cleaner is in 

operation; or 

214.2 A device that is used for the cleaning of spray guns, pots and hoses, that has an 

enclosed solvent container, uses non-atomized solvent flow to flush the spray 

equipment and collects and returns the discharged solvent to the enclosed container. 

215 EXEMPT COMPOUND: For the purposes of this rule, “exempt compound” has the same 

meaning as in Rule 101-GENERAL PROVISIONS AND DEFINITIONS 

216 FILLER: A preparation used to fill in cracks, grains, etc., of wood before applying a coating. 

217 FLOW COAT: A coating which is applied by flowing a stream of coating over an object and 

allowing any excess coating material to drain off. 

218 HIGH-SOLIDS STAIN: Stains containing more than 454 grams (1 pound) of solids per 3.785 

liters (1 gallon), by weight, and can include wiping stains, glazes, and opaque stains. 

219 HIGH-VOLUME, LOW-PRESSURE (HVLP): Equipment used to apply coatings by means of 
SACRAMENTO METROPOLITAN AQMD RULES AND REGULATIONS 

 September 25, 2008 463-5 

a gun which is designed to be operated and which is operated between 0.1 and 10 psig air 

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

220 HISTORICAL REPRODUCTION COATING: A coating applied to an antique wood product 

produced in the nineteenth century or earlier, for the purpose of restoring the product to a 

historically accurate finish. 

221 INK: A fluid that contains dyes and/or colorants and is used to make markings, but not to 

protect surfaces. 

222 LOW-SOLIDS STAINS: Stains containing 454 grams (1 pound) or less of solids per 3.785 

liters (1 gallon) or less, by weight. 

223 LOW-VOLUME, LOW-PRESSURE (LVLP) EQUIPMENT: Spray coating application 

equipment with air pressure between 0.1 and 10.0 pounds per square inch gauge (psig) and 

air volume less than 15.5 cfm per spray gun and which operates at a maximum fluid delivery 

pressure of 50 psig. 

224 MAJOR STATIONARY SOURCE OF VOC: For the purpose of this rule, a major stationary 

source of VOC is a stationary source with a potential to emit exceeding 25 tons per year of 

volatile organic compounds or with a potential to emit exceeding the major stationary source 

thresholds that are listed in Title I of the Federal Clean Act for volatile organic compounds 

which correspond to the nonattainment designation of the District. The fugitive emissions of a 

source shall not be considered in determining whether it is a major stationary source, unless 

the source belongs to a category regulated by a standard promulgated under Section 111 or 

112 (42 U.S.C. Section 7411 of 7412) of the Federal Clean Air Act, but only with respect to 

those air pollutants that have been regulated for that category. 

225 MOLD-SEAL COATING: The initial coating applied to a new mold or repaired mold to 

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

from sticking to the mold. 

226 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. 

227 NEW WOOD PRODUCT: A wood product which has not been previously coated. A wood 

product from which uncured coatings have been removed to repair flaws in initial coatings 

applications is a new wood product. 

228 PIGMENTED COATINGS: Opaque coatings which contain binders and colored pigments 

which are formulated to hide the wood surface, either as an undercoat or topcoat. 

229 REACTIVE DILUENT: A liquid component of a coating which is a VOC during application, 

and one in which, through chemical or physical reactions, such as polymerization, becomes 

an integral part of a finished coating. 

230 REFINISHING OPERATION: The steps necessary to remove cured coatings and to repair, 

preserve, or restore a wood product. 

231 REPAIR COATING: A coating used to recoat portions of a product which has sustained 

mechanical damage to the coating following normal coating operations. 

232 ROLL COATER: A series of mechanical rollers that forms a thin coating film on the surface 

of the roller, which is applied to a substrate by moving the substrate underneath the roller. 

233 SEALER: A coating, containing binders, which seals the wood prior to application of 

subsequent coatings. 
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463-6 September 25, 2008 

234 STENCIL COATING: An ink or a pigmented coating which is rolled or brushed onto a 

template or stamp in order to add identifying letters and/or numbers to wood products. 

235 STRIPPER: A liquid used to remove cured coatings, cured inks, and/or cured adhesives. 

236 SURFACE PREPARATION MATERIAL: A VOC-containing material applied to the surface 

of any wood product, prior to the application of coatings, to clean the wood product or to 

promote the adhesion of subsequent coatings. 

237 TONER: A wash coat which contains binders and dyes or pigments to add tint to a coated 

surface. 

238 TOUCH-UP COATING: A coating used to cover minor coating imperfections appearing after 

the main coating operation. 

239 VOLATILE ORGANIC COMPOUND (VOC): For the purposes of this rule, “volatile organic 

compound” has the same meaning as in Rule 101- GENERAL PROVISIONS AND 

DEFINITIONS. 

240 VOLATILE ORGANIC COMPOUND COMPOSITE PARTIAL VAPOR PRESSURE: The 

sum of the partial pressures of compounds defined as VOCs. 

241 WASH COAT: A coating that is used to seal wood surfaces, preventing undesired staining, 

and control penetration. For the purpose of this rule, washcoats shall be considered lowsolids coatings and shall contain less than 454 grams (1 pound) of solids per 3.785 liters (1 

gallon), by weight. Wash coats with greater than 454 grams (1 pound) of solids per 3.785 

liters (1 gallon), by weight, shall be considered sealers. 

242 WOOD PANEL: Any piece of wood or wood composition, which is solid or laminated, and 

which is larger than 10 square feet in size, and which is not subsequently cut into smaller 

pieces. 

243 WOOD PRODUCTS: Surface-coated products which include cabinets (kitchen, bath, and 

vanity), tables, chairs, beds, sofas, shutters, art objects, and any other coated objects made 

of solid wood, and/or wood composition. 

244 WOOD PRODUCT COATING APPLICATION OPERATIONS: A combination of coating 

application steps which may include use of spray guns, flash-off areas, spray booths, ovens, 

conveyors, and/or other equipment operated for the purpose of applying coating materials. 

300 STANDARDS 

301 APPLICATION EQUIPMENT REQUIREMENTS: A person subject to the provisions of this 

rule shall not apply any wood product coating to any wood products, unless one of the 

following application methods is used: 

301.1 Electrostatic application equipment 

301.2 High Volume Low Pressure spray equipment 

301.3 Dip coat 

301.4 Flowcoat 

301.5 Hand application methods, such as brush or roller 

301.6 Roll coater 

301.7 Low Volume Low Pressure spray equipment 

301.8 Air assisted airless, for touch-up and repair only 

301.9 Any other equivalent method which has been approved in writing by the Air Pollution 

Control Officer and the U.S. Environmental Protection Agency 
SACRAMENTO METROPOLITAN AQMD RULES AND REGULATIONS 

 September 25, 2008 463-7 

302 VOC CONTENT OF COATINGS FOR NEW WOOD PRODUCTS: Except as provided in 

Sections 110, 305, and 306 no person shall apply any coating, to a new wood product, which 

has a volatile organic compound (VOC) content as applied exceeding the applicable limits 

specified below. The VOC content of coatings, except low-solid stains, toners, and 

washcoats, shall be determined in accordance with Sections 403 and 503.1. The VOC 

content of low-solid stains, toners and washcoats shall be determined in accordance with 

Sections 404 and 503.1. 

302.1 If emission averaging is not used to achieve compliance with this section, VOC limits 

expressed in grams per liter shall be used. 

302.2 If emission averaging is used to achieve compliance with this section, VOC limits 

expressed in pounds of VOC per pound of solids shall be used, except for low-solids 

stains, toners, and washcoats, for which VOC limits expressed in grams per liter 

shall be used. 

COATING

VOC LIMITS

Grams Per Liter of Coating (lbs-VOC/lbssolids) 

Less water and Less Exempt Compounds 

Clear Topcoats 275 (0.35) 

Conversion Varnish (when used as a 

combined sealer/topcoat system) 550 (1.20) 

Filler 275 (0.18) 

High-Solid Stain 350 (0.42) 

Inks 500 (0.96) 

Mold-Seal Coating 750 (4.20) 

Multi-Colored Coating 275 (0.33) 

Pigmented Coating 275 (0.25) 

Sealer 275 (0.36) 

COATING

VOC LIMITS

Grams Per Liter (lbs/gal) of Material 

Low-Solid Stains, Toners, Washcoats 120 (1.00) 

303 VOC CONTENT OF COATINGS FOR REFINISHING, REPAIRING, PRESERVING, OR 

RESTORING WOOD PRODUCTS: Except as provided in Sections 110, 305, and 306 no 

person shall apply any coating, to refinish, repair, preserve, or restore a wood product, which 

has a volatile organic compound (VOC) content exceeding the applicable limits specified 

below. The VOC content of coatings, except low-solid stains, toners, and washcoats, shall 

be determined in accordance with Sections 403 and 503.1. The VOC content of low-solid 

stains, toners and washcoats shall be determined in accordance with Sections 404 and 

503.1. 

303.1 If emission averaging is not used to achieve compliance with this section, VOC limits 

expressed in grams per liter shall be used. 

303.2 If emission averaging is used to achieve compliance with this section, VOC limits 

expressed in pounds of VOC per pound of solids shall be used, except for low-solids 

stains, toners, and washcoats, for which VOC limits expressed in grams per liter 

shall be used. 
SACRAMENTO METROPOLITAN AQMD RULES AND REGULATIONS 

463-8 September 25, 2008 

COATING

VOC LIMITS

Grams Per Liter of Coating 

(lbs-VOC/lbs-solids) 

Less water and Less Exempt Compounds 

Clear Topcoats 680 (2.5) 

Conversion Varnish 550 (1.20) 

Filler 500 (0.96) 

High-Solid Stain 700 (2.57) 

Inks 500 (0.96) 

Mold-Seal Coating 750 (4.20) 

Multi-Colored Coating 680 (2.60) 

Pigmented Coating 600 (1.60) 

Sealer 680 (2.5) 

COATING VOC LIMITS

Grams Per Liter (lbs/gal) of Material 

Low-Solid Stains, Toners, Washcoats 480 (4.00) 

304 VOC CONTENT FOR STRIPPERS: A person shall not use a stripper on wood products 

unless: 

304.1 it contains less than 350 grams of VOC per liter of material; or 

304.2 the VOC composite partial vapor pressure is 2 mm Hg (0.04 psia) or less at 20o

C 

(68o

F), as calculated pursuant to Section 402. 

305 EMISSION CONTROL EQUIPMENT:

305.1 As an alternative, a person may comply with the VOC limits specified in Sections 

302, 303, and 304, by using an approved air pollution control system consisting of 

capture and control devices, which reduces VOC emissions from the application of 

wood products coatings or strippers by an equivalent or greater amount than the 

limits specified in Sections 302, 303, and 304, with the written approval of the Air 

Pollution Control Officer. The minimum required overall capture and control 

efficiency of an emission system at which an equivalent or greater level of VOC 

reduction will be achieved, shall be calculated by the following equation: 

100

1

1

. . 1 ×

⎟

⎟

⎠

⎞

⎜

⎜

⎝

⎛ −

⎟

⎟

⎠

⎞

⎜

⎜

⎝

⎛ −

= − ×

c

LWc

nMax

WnMax

LWnMax

LWc

D

VOC

D

VOC

VOC

VOC C E

Where: C.E. = Overall Control Efficiency, percent. 

VOCLWc = VOC Limit of Rule 463, less water and less exempt 

compounds, pursuant to Sections 302, 303, and/or 

304. 

VOCLWn,Max = Maximum VOC content of non-compliant coating 

used in conjunction with a control device, less 

water and less exempt compounds. 

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

the non-compliant coating, containing the 

maximum VOC content of the multicomponent 

coating. 
SACRAMENTO METROPOLITAN AQMD RULES AND REGULATIONS 

 September 25, 2008 463-9 

Dc = Density of corresponding solvent, reducer, or 

thinner used in the compliant coating system = 880 

g/L. 

305.2 The capture system shall vent all drying oven exhaust to the control device and shall 

have one or more inlets for collection of fugitive emissions; and 

305.3 During any period of operation of a thermal incinerator, combustion temperature shall 

be continuously monitored; and 

305.4 During any period of operation of a catalytic incinerator, exhaust gas temperature 

shall be continuously monitored; and 

305.5 Written approval for the use of such equipment is obtained from the Air Pollution 

Control Officer prior to installation or use of the equipment. 

306 EMISSIONS AVERAGING PROVISIONS: 

306.1 For historical reproduction coatings only, and not at a major stationary source of 

VOC, a person may comply with the provisions of Section 303 by using an averaging 

approach for a maximum of 20 gallons per year of historical reproduction coatings 

used at the facility, provided that all requirements of this Section are met. 

a. A person using the provisions of this Section for compliance shall 

demonstrate that emissions from the coatings being averaged, on pounds of 

VOC per pounds of solids basis, on a rolling 30-day basis, are less than or 

equal to the allowable emissions, based on the following: 

∑ () () ∑ = =

≥

n

i

i i

n

i

VOCi Ui ER U

1 1

Where: VOCi

 = VOC content limit of coating “I” (grams of VOC per liter of 

material for low solids coatings and pounds of VOC per 

pound of solids for all other coatings, as required in Section 

303). 

Ui = Usage of coating “I” (liters of material for low-solids 

coatings, and pounds of solids for all other coatings), and 

Eri = Actual VOC content of coating “I”, as applied (grams per 

liter for low-solids materials and pounds of VOC per 

pounds of solids for all other coatings). 

b. Any wood product coating not included in the emissions averaging shall 

comply with the VOC limits in Sections 302, 303, or 304. 

306.2 If a stationary source does not satisfy the demonstration requirement in Section 

306.1(a) at any time during a rolling 30-day period, the stationary source has 

exceeded Section 306.1(a) on every day of the rolling 30-day period. 

307 EMISSIONS AVERAGING PLAN:

307.1 A person wanting to use emissions averaging to achieve compliance with this rule 

shall submit an Emissions Averaging Plan (“Plan”) for approval by the Air Pollution 

Control Officer. The Plan may not be implemented until it is approved, in writing, by 

the Air Pollution Control Officer. Submittal of a Plan does not provide an exemption 

from the requirements of this rule. The Plan must be resubmitted, for approval by 

the Air Pollution Control Officer on an annual basis. If the Plan is not approved, 

emissions averaging will not be permitted. 

307.2 The Plan shall include, at a minimum: 

a. A description of the wood product coatings to be included in the averaging 

program, and 

b. A description of the quantification and record keeping for coating usage, 

coating VOC and solids content, VOC emissions, and calculations to show 

compliance with Section 306. 

308 REQUIREMENTS FOR SURFACE PREPARATION AND CLEANUP MATERIALS: Any 

person subject to this rule shall comply with the following requirements: 
SACRAMENTO METROPOLITAN AQMD RULES AND REGULATIONS 

463-10 September 25, 2008 

308.1 Until September 25, 2009, spray gun nozzles only, may be soaked in solvent-based 

materials for cleaning, provided the container (not to exceed five (5) gallons in size) 

is kept tightly covered at all times except when accessing the container. 

308.2 Closed containers shall be used for the disposal of cloth or paper used for surface 

preparation, cleanup, and coating removal. 

308.3 VOC-containing materials shall be stored in containers, which are closed when not in 

use, and shall be disposed of in a manner that the VOC are not emitted into the 

atmosphere. 

308.4 Until September 25, 2009, a person shall not use solvent-based VOC-containing 

materials for the cleanup of spray equipment used in wood products coating 

application operations, unless the spray equipment is disassembled and cleaned in 

an enclosed gun cleaner. 

308.5 Prior to September 25, 2009, a person shall not perform surface preparation or 

cleanup with a material containing VOC in excess of 200 grams per liter (1.67 

pounds per gallon). 

308.6 Effective September 25, 2009, a person shall not perform surface preparation or 

cleanup with a material containing VOC in excess of 25 grams per liter (0.21 pounds 

per gallon). 

400 ADMINISTRATIVE REQUIREMENTS 

401 LABELING REQUIREMENTS: VOC CONTENT: Each container of any coating, surface 

preparation material, or cleanup material, or stripper shall display its maximum VOC content 

of the coating, as applied, and after any thinning as recommended by the manufacturer, or 

shall have this information provided in a product data sheet supplied with the container. VOC 

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

solvent, and excluding any colorant added to tint bases), surface preparation and cleanup 

material, or stripper. VOC content displayed may be calculated using product formulation 

data, or may be determined using the test method in Section 503.1. Alternatively, containers 

for strippers subject to the provisions of Section 304 may display only the partial vapor 

pressure. 

402 CALCULATION FOR DETERMINING VOLATILE ORGANIC COMPOUND COMPOSITE 

PARTIAL VAPOR PRESSURE. VOC composite partial vapor pressure for 

Determination of compliance with Section 304 shall be calculated by the following equation: 

( )( )

∑

∑

=

=

+ +

= n

i i

i

e

e

w

w

n

i

i i i

c

MW

W

MW

W

MW

W

W VP MW

PP

1

1

Where: Ppc = VOC composite partial pressure at 20o

C, in mm Hg. 

Wi

 = Weight of the "I"th VOC compound, in grams. 

Ww = Weight of water, in grams. 

We = Weight of exempt compounds, in grams. 

Mwi

 = Molecular weight of the "I"th VOC compound, in (g/gmole). 

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

Mwe = Molecular weight of exempt compound, in (g/g-mole). 

Vpi = Vapor pressure of the "I"th VOC compound at 20o

C, in 

mm Hg. 

403 CALCULATION FOR DETERMINING WEIGHT OF VOC PER VOLUME OF COATING, 

LESS WATER AND LESS EXEMPT COMPOUNDS: The weight of VOC per combined 

volume of VOC and coating solids shall be calculated by the following equation: 
SACRAMENTO METROPOLITAN AQMD RULES AND REGULATIONS 

 September 25, 2008 463-11 

m w ec

v w ec

V V V

W W W G − −

− − 1 =

Where: G1 = Weight of VOC per volume of coating, less water and less 

exempt compounds. 

Wv = Weight of volatile compounds, in grams. 

Ww = Weight of water, in grams. 

Wec = Weight of exempt compounds, in grams. 

Vm = Volume of coating material, in liters. 

Vw = Volume of water, in liters. 

Vec = Volume of exempt compounds, in liters. 

404 CALCULATION FOR DETERMINATION OF VOC CONTENT PER VOLUME OF 

MATERIAL: The volume of material is defined as the volume of the original material, plus 

any VOC-containing material added to the original material. The original material is the 

material before any VOC-containing material such as solvent is added for purposes of mixing 

or thinning. The VOC content shall exclude any colorant added to a tintbase. The weight of 

VOC per total volume of material shall be calculated by the following equation: 

( )

m

v w ec

V

W −W −W

Where: Wv = Weight of all volatile compounds. 

Ww = Weight of water. 

Wec = Weight of compounds listed as exempt in Section 215 from 

the definition of VOC. 

Vm = Volume of material. 

405 CALCULATION FOR DETERMINATION OF POUNDS OF VOC PER POUND OF SOLIDS:

405.1 Pounds of VOC per pound of solids is the weight of VOC per weight of coating solids 

within any given volume of coating, and can be calculated by the test method found 

in Section 503.2 and the following equation: 

r

s w es

W

W −W −W Pounds of VOC per Pound of Solids =

Where: Ws = Weight of Volatile compounds in pounds 

Ww = Weight of water in pounds 

Wes = Weight of exempt compounds in pounds 

Wr = Weight of coating solids in pounds 

405.2 For coatings that contain reactive diluents, the VOC content of the coating is 

determined after curing. The pounds of VOC per pound of coating solids shall be 

calculated by the test method found in Section 503.7 and the following equation: 

r

s w es

W

W −W −W Pounds of VOC per Pound of Solids =

Where: Ws = Weight of Volatile compounds in pounds, emitted into the 

atmosphere during curing 

Ww = Weight of water in pounds, emitted into the atmosphere 

during curing 

Wes = Weight of exempt compounds in pounds, emitted into the 

atmosphere during curing 

Wr = Weight of coating solids in pounds, prior to reaction 
SACRAMENTO METROPOLITAN AQMD RULES AND REGULATIONS 

463-12 September 25, 2008 

406 OPERATION AND MAINTENANCE PLAN (“O&M Plan”): Any person using an approved 

emission control device pursuant to Section 305 as a means of complying with this rule must 

submit, with the application for Authority to Construct, pursuant to Rule 201 - GENERAL 

PERMIT REQUIREMENTS, an O&M Plan for the emission control device to the Air Pollution 

Control Officer for approval. O&M Plans for emission control devices installed as of prior to 

the adoption of this rule, if not previously submitted, must be submitted by 7-1-97 and receive 

approval of the Air Pollution Control Officer. Each O&M Plan shall specify operation and 

maintenance procedures which will demonstrate continuous operation of the emission control 

device during periods of emissions-producing operations. Each O&M Plan shall also specify 

which records must be kept to document these operations and maintenance procedures. 

These records shall comply with the requirements of Section 501. An O&M Plan shall be 

implemented upon approval of the Air Pollution Control Officer. 

 

500 MONITORING AND RECORDS: 

501 USAGE RECORDS: In addition to any applicable record keeping requirements of either Rule 

202 - NEW SOURCE REVIEW, Rule 207 - TITLE V - FEDERAL OPERATING PERMIT 

PROGRAM, and Rule 209 - LIMITING POTENTIAL TO EMIT, or any other District rule which 

may be applicable, persons subject to this rule shall maintain the following records in order to 

evaluate compliance: 

501.1 a. A data sheet, material list, or invoice giving material name, manufacturer 

identification, material application, and VOC content; and 

b. Any catalysts, reducers, or other components used, and the mix ratio; and 

c. The applicable VOC limit from Section 302 or 303, and the actual VOC 

content of the wood product coating as applied. 

501.2 a. For persons using coatings or materials which comply with the VOC limits 

specified in Sections 302, 303, and 304, records shall be maintained on a 

monthly basis, showing the type and volume of coatings, strippers and 

surface preparation and cleanup materials used. Coating type shall be 

designated according to the coating categories as listed in Sections 302, 

303, and 304. 

b. For coatings used in emissions averaging pursuant to Section 306, daily 

records shall be maintained, showing the type and volume of coatings, 

strippers and surface preparation and cleanup materials used. 

c. If at any time a person uses coatings or materials exceeding the VOC limits 

specified in Sections 302, 303, and 304, records shall be maintained on a 

daily basis showing the type and volume of materials used. 

d. For persons using a collection and control system pursuant to Section 305, 

records shall be maintained on a daily basis, showing the type and volume 

of coatings and solvents used. 

501.3 Any person using an emission control system pursuant to the provisions of Section 

305, as a means of compliance 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 emissionproducing activities. Key system operating parameters are those necessary to 

ensure compliance with the requirements of Section 305. 

502 DURATION OF RECORDS: 

502.1 Prior to September 25, 2010, all records required by this rule shall be maintained for 

at least three years, and shall be made available to the Air Pollution Control Officer 

upon request. 

502.2 Effective September 25, 2010, all records required by this rule shall be maintained 

for at least five years, and shall be made available to the Air Pollution Control Officer 

upon request. 
SACRAMENTO METROPOLITAN AQMD RULES AND REGULATIONS 

 September 25, 2008 463-13 

503 TEST METHODS

503.1 DETERMINATION OF VOC CONTENT: VOC content of wood product coatings, 

strippers, and surface preparation and cleanup materials, subject to this rule, shall be 

determined in accordance with EPA Method 24 and Section 403 or 404 of this rule, 

as applicable. 

503.2 DETERMINATION OF COMPOSITION OF VOC: The composition of VOC shall be 

as specified on the manufacturer's label or data sheet, or as determined by ASTM 

Method E260-96(2006), Standard Practice for Packed Column Gas 

Chromatography. 

503.3 DETERMINATION OF COMPOUNDS EXEMPT FROM VOC DEFINITION: 

Compounds exempted from VOC definition, as listed in Section 215 of this rule, shall 

be determined in accordance with ASTM D-4457-02 (2008), or ARB Method 432. If 

any of the perfluorocarbons or volatile cyclic and linear methyl siloxanes are being 

claimed as exempt compounds, the person making the claim must state in advance 

which compounds are present, and the EPA-approved test method used to make the 

determination of these compounds. 

503.4 DETERMINATION OF CAPTURE EFFICIENCY: Collection efficiency shall be 

determined in accordance with the U.S. EPA technical guideline document, 

“Guidelines for Determining Capture Efficiency,” dated January 9, 1995. Individual 

capture efficiency test runs subject to U.S. EPA technical guidelines shall be 

determined by:

a. Applicable U.S. EPA methods 204, 204A, 204B, 204C, 204E, and/or 204F; 

or 

b. The South Coast Air Quality Management District “Protocol for 

Determination of Volatile Organic Compound (VOC) Capture Efficiency”; or 

c. Any other method approved by the U.S. EPA, the California Air Resources 

Board, and the Air Pollution Control Officer. 

503.5 DETERMINATION OF CONTROL EFFICIENCY: Efficiency of control equipment 

shall be determined in accordance with EPA Method 18, 25, 25A, EPA Method 2 or 

2C (whichever is applicable). 

503.6 VAPOR PRESSURE: Vapor pressures may be obtained from standard reference 

texts or may be determined by ASTM D 2879-97 (2007). 

503.7 VOLATILE CONTENT OF RADIATION CURABLE MATERIALS: Volatile content of 

radiation curable materials shall be obtained in accordance with ASTM Method D 

5403-93 (2007). 

503.8 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. 
SACRAMENTO METROPOLITAN AQMD RULES AND REGULATIONS 

463-14 September 25, 2008 

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