Sec. 228-2.6. Compliance procedures and test methods

(a) Except as provided in sections 228-2.2, 228-2.4 and 228-2.5 of this Subpart, the VOC and solids content of all non-aerosol adhesives, adhesive primers and cleanup solvents shall be determined using U.S. EPA Reference Method 24, as identified in 40 CFR 60, appendix A, or SCAQMD Method 304-91.

(b) The organic content of exempt organic compounds shall be determined using ASTM D4457-02.

(c) The VOC content of any plastic welding cement adhesive or primer shall be determined using SCAQMD Method 316A-92.

(d) To determine if a diluent is a reactive diluent, the percent of the reactive organic compound that becomes an integral part of the finished materials shall be determined using SCAQMD Method 316A-92.

(e) The composite vapor pressure of organic compounds in cleaning materials shall be determined by quantifying the amount of each compound in the blend using gas chromatographic analysis ASTM E 260-96 (2006) for organics and ASTM D3792-05 for water content, as applicable, and the following equation:

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Where:

Ppc = VOC composite partial pressure at 20°C, in mm Hg.

Wi = Weight of the “i”th VOC compound, in grams, as determined by ASTM E 260-96.

Ww = Weight of water, in grams as determined by ASTM D 3792-05.

We = Weight of the “i”th exempt compound, in grams, as determined by ASTM E 260-96.

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, 18 grams per g-mole.

Mwe = Molecular weight of the “i”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 Hg, as determined by subdivision (f) of this section.

(f) The vapor pressure of each single component compound may be determined from ASTM D2879-97 or may be obtained from a source approved by SCAQMD, other California air districts, or the department.

(g) If air pollution control equipment is used to meet the requirements of this Subpart, the owner or operator shall make the following determinations:

(1) the measurement of capture efficiency shall be conducted and reported in accordance with the EPA Technical Document ‘Guidelines for Determining Capture Efficiency’, issued January 9, 1995; and

(2) the control efficiency shall be determined in accordance with U.S. EPA Reference Methods 25, 25A, and 25B found at 40 CFR part 60 appendix A, and CARB Method 100.

(h) The active and passive solvent losses from spray gun cleaning systems shall be determined using SCAQMD’s ‘General Test Method for Determining Solvent Losses from Spray Gun Cleaning Systems’, dated October 3, 1989. The test solvent for this determination shall be any lacquer thinner with a minimum vapor pressure of 105 mm of Hg at 20° C, and the minimum test temperature shall be 15° C.

(i) For adhesives that do not contain reactive diluents, grams of VOC per liter of adhesive, less water and exempt compounds, shall be calculated according to the following equation:

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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.

(j) For adhesives that contain reactive diluents, the VOC content of the adhesive is determined after curing. The grams of VOC per liter of adhesive, less water and exempt compounds, shall be calculated according to the following equation:

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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.

(k) Grams of VOC per liter of material shall be calculated according to the following equation:

​

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.

(l) 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.