What If I Wish to Use VOC Contents Different Than the Default Values?
You are required to use the best available data to report the VOC content whether it is higher or lower than the default value. AQMD recognizes and encourages the use of VOC data from the supplier Material Safety Data Sheets (MSDS). You must provide copies of the MSDS used in preparing your annual emission reports. Commercial grade generic organic chemicals used as solvents and thinners have their densities as the emission factors (VOC content). In these instances the values in Appendix B are adequate. The three-digit general Material Codes in Appendix B should be used on B3 and B3U forms in conjunction with the MSDS. However, if the MSDS cannot be secured nor an equivalent reliable reference provided, you may use VOC values provided in Appendix B. The VOC values in Appendix B are default factors that should only be used when more accurate values are unavailable.
