Section 710. Test methods and procedures

A. The provisions of 9VAC5-45-30 (Emission testing) apply.

B. Except as provided in subsections D, E and F of this section, the VOC and solids content of all nonaerosol adhesives, adhesive primers and cleanup solvents shall be determined using either Reference Method 24 or SCAQMD "Determination of Volatile Organic Compounds (VOC) In Various Materials" (see 9VAC5-20-21).

C. The organic content of exempt organic compounds shall be determined using ASTM "Standard Test Method for Determination of Dichloromethane and 1,1,1-Trichloroethane in Paints and Coatings by Direct Injection into a Gas Chromatograph" (see 9VAC5-20-21), as applicable.

D. The VOC content of any plastic welding cement adhesive or primer shall be determined using SCAQMD "Determination of Volatile Organic Compounds (VOC) in Materials Used for Pipes and Fittings" (see 9VAC5-20-21).

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 materials shall be determined using SCAQMD "Determination of Volatile Organic Compounds (VOC) in Materials Used for Pipes and Fittings" (see 9VAC5-20-21).

F. The composite vapor pressure of organic compounds in cleaning materials shall be determined by quantifying the amount of each compound in the blend using ASTM "Standard Practice for Packed Column Gas Chromatography" for organics and ASTM "Standard Test Method for Water Content of Coatings by Direct Injection Into a Gas Chromatograph" for water content (see 9VAC5-20-21), as applicable, and the following equation:

where:

Pp_c = VOC composite partial pressure at 20ºC, in mm Hg.

W_i = Weight of the "i"th VOC compound, in grams, as determined by ASTM "Standard Practice for Packed Column Gas Chromatography" (see 9VAC5-20-21).

W_w = Weight of water, in grams as determined by ASTM "Standard Test Method for Water Content of Coatings by Direct Injection Into a Gas Chromatograph" (see 9VAC5-20-21).

W_e = Weight of the "i"th exempt compound, in grams, as determined by ASTM "Standard Practice for Packed Column Gas Chromatography" (see 9VAC5-20-21).

Mw_i = Molecular weight of the "i"th VOC compound, in grams per g-mole, as given in chemical reference literature.

Mw_w = Molecular weight of water, 18 grams per g-mole.

Mw_e = Molecular weight of the "i"th exempt compound, in grams per g-mole, as given in chemical reference literature.

Vp_i = Vapor pressure of the "i"th VOC compound at 20ºC, in mm Hg, as determined by subsection G of this section.

G. The vapor pressure of each single component compound may be determined from ASTM "Standard Test Method for Vapor Pressure-Temperature Relationship and Initial Decomposition Temperature of Liquids by Isoteniscope " (see 9VAC5-20-21), from chemical reference literature or from additional sources acceptable to the board.

H. If air pollution control equipment is used to meet the requirements of 9VAC5-45-650, 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" (see 9VAC5-20-21).

2. The control efficiency shall be determined in accordance with Reference Methods 25, 25A, 25B or CARB Method 100 (see 9VAC5-20-21), as appropriate.

I. 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" (see 9VAC5-20-21). The test solvent for this determination shall be any lacquer thinner with a minimum vapor pressure of 105 mm of Hg at 20ºC, and the minimum test temperature shall be 15ºC.

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

where:

VOC = VOC content of adhesive, in grams per liter.

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

where:

VOC = VOC content of adhesive, in grams per liter.

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. The VOC content of materials, in grams per liter, shall be calculated according to the following equation:

where:

VOC = VOC content of materials, in grams per liter.

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:

where:

Wv = weight of VOC in grams.

W = weight of material in grams.

Historical Notes

Derived from Volume 26, Issue 12, eff. March 17, 2010.

Statutory Authority

§ 10.1-1308 of the Code of Virginia.