§ 130.705. Compliance procedures and test methods.
(a) Except as otherwise provided in this section, the VOC and solids content of nonaerosol adhesives (including one-part moisture cure urethane adhesives and silicone adhesives), sealants, adhesive primers, sealant primers, surface preparation solvents and cleanup solvents shall be determined using one of the following:
(1) EPA Reference Method 24, Determination of Volatile Matter Content, Water Content, Density, Volume Solids, and Weight Solids of Surface Coatings, found at 40 CFR 60, Subpart D, Appendix A, including updates and revisions.
(2) SCAQMD Method 304, Determination of Volatile Organic Compounds (VOC) in Various Materials, SCAQMD, 21865 Copley Drive, Diamond Bar, CA 91765 USA, including updates and revisions.
(b) The weight volatile matter content and weight solids content for one-part or multiple part reactive adhesives, except one-part moisture cure urethane adhesives and silicone adhesives, shall be determined using the EPA Reference Method, Determination of Weight Volatile Matter Content and Weight Solids Content of Reactive Adhesives, found at 40 CFR 63, Subpart PPPP, Appendix A, including updates and revisions.
(c) The identity and concentration of exempt organic compounds shall be determined using one of the following:
(1) ASTM D4457, Standard Test Method for Determination of Dichloromethane and 1,1,1-Trichloroethane in Paints and Coatings by Direct Injection into a Gas Chromatograph, ASTM International, 100 Barr Harbor Drive, P. O. Box C700, West Conshohocken, PA 19428-2959 USA, including updates and revisions.
(2) SCAQMD Method 303, Determination of Exempt Compounds, SCAQMD, 21865 Copley Drive, Diamond Bar, CA 91765 USA, including updates and revisions.
(d) The VOC content of a plastic cement welding adhesive or primer shall be determined using SCAQMD Method 316A, Determination of Volatile Organic Compounds (VOC) in Materials Used for Pipes and Fittings, SCAQMD, 21865 Copley Drive, Diamond Bar, CA 91765 USA, including updates and revisions.
(e) To determine if a diluent is a reactive diluent, the percentage of the reactive organic compound that becomes an integral part of the finished material shall be determined using SCAQMD Method 316A, Determination of Volatile Organic Compounds (VOC) in Materials Used for Pipes and Fittings, SCAQMD, 21865 Copley Drive, Diamond Bar, CA 91765 USA, including updates and revisions.
(f) The composite partial vapor pressure of organic compounds in cleaning materials shall be determined by the following procedure:
(1) Quantifying the amount of each compound in the blend using gas chromatographic analysis, using the following methods:
(i) ASTM E260, Standard Practice for Packed Column Gas Chromatography, ASTM International, 100 Barr Harbor Drive, P. O. Box C700, West Conshohocken, PA 19428-2959 USA, for organic content, including updates and revisions.
(ii) ASTM D3792, Standard Test Method for Water Content of Coatings by Direct Injection Into a Gas Chromatograph, ASTM International, 100 Barr Harbor Drive, P. O. Box C700, West Conshohocken, PA 19428-2959 USA, for water content, including updates and revisions.
(2) Calculating the composite partial vapor pressure using the following equation:
n
SIGMA (Wi)(VPi)/MWi
i=1
PPc =
kn
Ww/MWw + SIGMA We/MWe + SIGMA Wi/MWi
e=1i=1
Where:
PPc = VOC composite partial vapor pressure at 20° C, in mm mercury.
Wi = Weight of the ‘‘i’’th VOC compound, in grams, as determined by ASTM E260.
Ww = Weight of water, in grams, as determined by ASTM D3792.
We = Weight of the ‘‘e’’th exempt compound, in grams, as determined by ASTM E260.
MWi = Molecular weight of the ‘‘i’’th VOC compound, in grams per g-mole, as given in chemical reference literature.
MWw = Molecular weight of water, in grams per g-mole (18 grams per g-mole).
MWe = Molecular weight of the ‘‘e’’th exempt compound, in grams per g-mole, as given in chemical reference literature.
VPi = Vapor pressure of the ‘‘i’’th VOC compound at 20° C, in mm mercury, as determined by subsection (f).
(g) The vapor pressure of each single component compound shall be determined from one or more of the following:
(1) ASTM D2879, Standard Test Method for Vapor Pressure-Temperature Relationship and Initial Decomposition Temperature of Liquids by Isoteniscope, ASTM International, 100 Barr Harbor Drive, P. O. Box C700, West Conshohocken, PA 19428-2959 USA, including updates and revisions.
(2) The most recent edition of one or more of the following sources:
(i) Vapour Pressures of Pure Substances, Boublik, Elsevier Scientific Publishing Company, New York.
(ii) Perry’s Chemical Engineers’ Handbook, Green and Perry, McGraw-Hill Book Company.
(iii) CRC Handbook of Chemistry and Physics, CRC Press.
(iv) Lange’s Handbook of Chemistry, McGraw-Hill Book Company.
(v) Additional sources approved by the SCAQMD or other California air districts.
(h) The active and passive solvent losses from the use of an enclosed spray gun cleaning system or equivalent cleaning system, as listed in § 130.702(e)(1) (relating to emission standards), shall be determined using the SCAQMD method, General Test Method for Determining Solvent Losses from Spray Gun Cleaning Systems, dated October 3, 1989, SCAQMD, 21865 Copley Drive, Diamond Bar, CA 91765 USA, including updates and revisions.
(1) The test solvent for this determination shall be a lacquer thinner with a minimum vapor pressure of 105 mm of mercury at 20° C.
(2) The minimum test temperature shall be 15° C.
(i) Another test method may be used to determine the VOC or solids content of a product if the request for approval of the test method meets the following requirements:
(1) The request is submitted to the Department in writing.
(2) The request demonstrates that the test method provides results that accurately determine the concentration of VOCs in the product or its emissions.
(3) The Department approves the request in writing.
(j) For adhesive, sealant or primer products that do not contain reactive diluents, grams of VOC per liter of product thinned to the manufacturer’s recommendation, less water and exempt compounds, shall be calculated according to the following equation:
Grams of VOC per liter of product, as applied = Ws - Ww - We
Vm - Vw - VeWhere:
Ws = weight of volatile compounds, in grams.
Ww = weight of water, in grams.
We = weight of exempt compounds, in grams.
Vm = volume of material, in liters.
Vw = volume of water, in liters.
Ve = volume of exempt compounds, in liters.
(k) For adhesive, sealant or primer products that contain reactive diluents, the VOC content of the product is determined after curing. The grams of VOC per liter of product thinned to the manufacturer’s recommendation, less water and exempt compounds, shall be calculated according to the following equation:
Grams of VOC per liter of product, as applied = Wrs - Wrw - Wre
Vrm - Vrw - VreWhere:
Wrs = weight of volatile compounds not consumed during curing, in grams.
Wrw = weight of water not consumed during curing, in grams.
Wre = weight of exempt compounds not consumed during curing, in grams.
Vrm = volume of material not consumed during curing, in liters.
Vrw = volume of water not consumed during curing, in liters.
Vre = volume of exempt compounds not consumed during curing, in liters.
(l) For low-solids adhesive, sealant or primer products, grams of VOC per liter of product thinned to the manufacturer’s recommendation, including water and exempt compounds, shall be calculated according to the following equation:
Grams of VOC per liter of product, as applied = Ws - Ww - We
VmWhere:
Ws = weight of volatile compounds, in grams.
Ww = weight of water, in grams.
We = weight of exempt compounds, in grams.
Vm = volume of material, in liters.
(m) Percent VOC by weight shall be calculated according to the following equation:
% VOC by weight = [(Wv/W)] x 100
Where:
Wv = weight of VOCs in grams.
W = weight of material in grams.
(n) To convert from grams per liter (g/l) to pounds per gallon (lb/gal), multiply the result (VOC content) by 8.345 x 10-3 (lb/gal/g/l).
Cross References This section cited in 25 Pa. Code § 130.702 (relating to emission standards); and 25 Pa. Code § 130.706 (relating to container labeling).
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