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reactivity -- Public Hearing to Adopt New MIR Values
Posted: 01 Jul 2009 17:17:53
A public hearing is scheduled on November 3, 2009 in Sacramento to consider proposed amendments to the tables of MIR values for VOCs, and Doctor Carter’s MIR report is released for comments. When the Air Resources Board approved regulations containing maximum incremental reactivity (MIR) values, it required periodic reviews of MIR values and revision if necessary. The Board also directed amendments to update the MIR values be conducted through an Executive Officer Public Hearing. A public hearing to consider the proposed amendment is scheduled on November 3, 2009 in Sacramento, California. Please mark your calendar if you plan to attend. Dr. Bill Carter recently submitted an updated report, “Updated Maximum Incremental Reactivity Scale and Hydrocarbon Bin Reactivities for Regulatory Applications”, and an associated spreadsheet “HCcalc”, which are posted at ARB’s website: http://www.arb.ca.gov/research/reactivity/reactivity.htm. We intend to use the MIR values in this report as the basis for the revision to be considered at the hearing. This report presents an updated table of MIR values for quantifying relative ground-level ozone impacts of VOCs, and a revised “bin” method to derive MIR values for complex hydrocarbon solvents. The revised method derives a chemical composition for each hydrocarbon bin, and uses MIR values for each constituent to calculate the MIR value for each bin. Please review the report and the list of compounds and mixtures for which Dr. Carter’s report provides MIR values. If you have comments or suggestions for additional substances to be listed, please contact me at rpropper@arb.ca.gov or (916) 323-1535. We expect to hold a public workshop in Sacramento on August 4 to discuss these planned revisions to the MIR values, in conjunction with a consumer products workshop. An announcement letter will be posted soon to the website, http://www.arb.ca.gov/consprod/regact/tscpwg/tscpwg.htm. Re: ARB Website Content Survey The ARB is asking regular website users to take a few minutes to complete a brief survey about their experiences with our site. Your participation will help us improve our website to serve you better. Thank you. Link to Survey: http://www.zoomerang.com/recipient/survey-intro.zgi?p=WEB2298ML2JK9E