Except as provided in §§C, D, and E of this regulation, the VOC and solids content of all nonaerosol 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. The organic content of exempt organic compounds shall be determined using ASTM D4457-85, as applicable. The VOC content of a plastic welding cement adhesive or primer shall be determined using SCAQMD Method 316A. 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. 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 260-91) for organics and ASTM D3792-79 for water content, as applicable, and the following equation: The vapor pressure of each single component compound may be determined from ASTM D2879-86 or may be obtained from a source approved by SCAQMD, other California air districts, or the Department. If air pollution control equipment is used to meet the requirements of this chapter, the owner or operator shall make the following determinations: 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 The control efficiency shall be determined in accordance with U.S. EPA Methods 25, 25A, or 25B or CARB Method 100. 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 a lacquer thinner with a minimum vapor pressure of 105 millimeters of mercury at 20°C, and the minimum test temperature shall be 15°C. 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: 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: Grams of VOC per liter of material shall be calculated according to the following equation: Percent of VOC by weight shall be calculated according to the following equation: