There will a hearing, see the below announcement, copied in from a mailing in late December:
The Office of Environmental Health Hazard Assessment (OEHHA) is presenting draft documents for discussion by the Scientific Review Panel on Toxic Air Contaminants at its meeting at 9:00 a.m. on January 21, 2011 at the University of California, Berkeley (Room 150, University Hall, 2199 Addison Street, Berkeley, California 94720: see http://www.arb.ca.gov/srp/srpmeetings.htm for details and agenda – not yet posted in week 52).
The document presented here on Toxicity Equivalence Factors for dioxin-like compounds is a proposed revision to the previous version that appears as Appendix C of the Technical Support Document for Cancer Potency Factors. The proposed acute, 8 hour, and chronic RELs for Caprolactam, which are 770 µg/m3 (170 ppb), 10 µg/m3 (2 ppb), and 4 µg/m3 (0.8 ppb), respectively, were developed using the latest version of the non-cancer REL guidelines, including application of the revised methodology to protect infants, children and other sensitive subpopulations. When finalized and adopted, these RELs will be added to the compound-specific toxicity reviews and summary tables which appear as appendices to the Technical Support Document for the Derivation of Noncancer Reference Exposure Levels.
Please direct any inquiries concerning technical matters to Dr. Andrew G. Salmon at (510) 622-3191 or firstname.lastname@example.org.
Just for comparison with similar European limit values – German AgBB adopted an LCI value of 240 µg/m³ as being protective, after long scientific discussion, and French AFSSET selected an LCI value of 100 µg/m³ – both much higher than the proposed Califoria CREL value.