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OEHHA released for public comment its Proposed Revised Toxicity Equivalency Factors (TEF WHO-97) for PCDDs, PCDFs, and Dioxin-Like PCBs, and held a workshop in support of that effort.

OEHHA extended the public comment period for its Proposed Revised Reference Exposure Levels for Toluene Diisocyanate and Methylene Diphenyl Diisocyanate.

OEHHA released for public comment its draft Reference Exposure Levels for Toluene Diisocyanate and Methylene Diphenyl Diisocyanate, and held accompanying workshops.

OEHHA released for public comment its proposed Revised Reference Exposure Levels for Toluene Diisocyanate and Methylene Diphenyl Diisocyanate.