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VOC Content (ls)= the VOC content of a low solids coating in grams per liter of coating

Ws= weight of volatiles, in grams

Ww= weight of water, in grams

Wec= weight of exempt compounds, in grams

Vm= volume of coating, in liters

B.VOC content of coatings. To determine the physical properties of a coating in order to perform the calculations in section 6(A), the reference method for VOC content is U.S. EPA Method 24 (40 CFR Part 60, Appendix A), incorporated by reference in section 6(E)(11), except as provided in section 6(C) and 6(D). An alternative method to determine the VOC content of coatings is SCAQMD Method 304-91 (Revised February 1996), incorporated by reference in section 6(E)(12).

To determine the VOC content of a coating, the manufacturer may use U.S. EPA Method 24, or an alternative method, as provided in section 6(C), formulation data, or any other reasonable means for predicting that the coating has been formulated as intended (e.g. quality assurance checks, recordkeeping). However, if there are any inconsistencies between the results of a Method 24 test and any other means for determining VOC content, the Method 24 results will govern, except when an alternative method is approved as specified in section 6(C). The Department may require the manufacturer to conduct a Method 24 analysis.

Exempt compound content shall be determined by SCAQMD Method 303-91 (Revised August 1996), incorporated by reference in section 6(E)(10). The exempt compound parachlorobenzotrifluoride (PCBTF) shall be determined by BAAQMD Method 41, incorporated by reference in section 6(E)(9). Exempt compounds that are cyclic, branched, or linear, completely methylated siloxanes, shall be determined by BAAQMD Method 43, incorporated by reference in section 6(E)(8).

C. Alternative test methods. Other test methods demonstrated to provide results that are acceptable for the purposes of determining compliance with section 6(B), after review and approval in writing by the Department and EPA, also may be used.

D. Methacrylate traffic coating markings. Analysis of methacrylate multi-component coatings used as traffic marking coatings shall be conducted according to a modification of U.S. EPA Method 24 (40 CFR Part 59, subpart D, Appendix A), incorporated by reference in section 6(E)(13). This method has not been approved for methacrylate multi-component coatings used for purposes other than as traffic marking coatings or for other classes of multi-component coatings.

E.  Test methods. The following test methods are incorporated by reference herein, and shall be used to test coatings subject to the provisions of this rule:

(1)Flame spread index. The flame spread index of a fire–retardant coating shall be determined by the ASTM Designation E 84-99, “Standard Test Methods for Surface Burning Characteristics of Building Materials”.

Chapter 151: Architectural and Industrial Maintenance Coatings


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