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OEHHA released its draft RELs for Carbonyl Sufide for public comment, and held supporting workshops.

OEHHA adopted its revised Reference Exposure Levels for Benzene after approval by the Scientific Review Panel.

OEHHA released its Proposed Revised Reference Exposure Levels for Benzene for public comment, and held supporting workshops. 

OEHHA adopted a revision of its Reference Exposure Levels for 1,3-butadiene after approval by the Scientific Review Panel.

OEHHA released its proposed revised Reference Exposure Levels for 1,3-butadiene for public comment, and held supporting workshops.

OEHHA extended the public comment period and held workshops for its Chronic Toxicity Summary for silica (crystalline, respirable).