(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:
Click to view image
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 -Ve.
Where:
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 - Vre
Where:
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
Vm
Where:
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).
