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OEHHA adopts 14 micrograms per day for oral exposure and 50 micrograms per day for inhalation exposure as the No Significant Risk Levels for trichloroethylene.

OEHHA proposal to update the existing regulatory levels posing no significant risk for trichloroethylene, to 14 micrograms per day for oral exposure and 50 micrograms per day for inhalation exposure.

Notice of Modifications to Text of Regulations Title 22, California Code of Regulations Sections 12705 and 12805

Notice of Modifications to Text of Proposed Regulations Title 22, California Code of Regulations Sections 12705 and 12805

The regulation adopts a NSRL of 41 ug/day for chlorothalonil.

Notice of a change to a proposed No Significant Risk Level (NSRL) for chlorothalonil from 27 ug/day to 41 ug/day.

Proposed NSRL for chlorothalonil of 27 ug/day

Establishment of NSRL of 29 ug/day for 4-Methylimidazole (4-MEI)

The proposed NSRL for 4-MEI has been changed from 16 to to 29 micrograms per day.

Proposal to establish a specific regulatory level posing no significant risk for 4-methylimidazole (4-MEI) of 16 ug/day