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The Office of Environmental Health Hazard Assessment (OEHHA) is releasing a draft document for public review, summarizing the toxicity and derivation of proposed Reference Exposure Levels (RELs) for Chromium (Trivalent) and Inorganic Water-Soluble Trivalent Chromium Compounds (Cr(III)).

The Office of Environmental Health Hazard Assessment is adopting new cancer inhalation unit risk and slope factors for Cobalt and Cobalt Compounds for use in the Air Toxics Hot Spots Program.  Inhalation unit risks are used to estimate lifetime cancer risks associated with inhalation exposure to a carcinogen. 

The Office of Environmental Health Hazard Assessment (OEHHA) is adopting new Reference Exposure Levels (RELs) for Toluene for use in the Air Toxics Hot Spots Program. RELs are airborne concentrations of a chemical that are not anticipated to result in adverse noncancer health effects for specified exposure durations in the general population, including sensitive subpopulations.

OEHHA is required to develop guidelines for conducting health risk assessments under the Air Toxics Hot Spots Program (Health and Safety Code Section 44360(b)(2)).  In implementing this requirement, OEHHA develops new IURs and revises existing IURs for many air pollutants.

The Office of Environmental Health Hazard Assessment (OEHHA) is releasing a draft document summarizing the carcinogenicity and derivation of a cancer inhalation unit risk factor (IUR) for p‑Chloro-α,α,α-trifluorotoluene (p-chlorobenzotrifluoride, PCBTF).  IURs are used to estimate lifetime cancer risks associated with inhalation exposure to a carcinogen.

OEHHA has received a request from the American Coatings Association to extend the public comment period. This notice extends the comment period to December 17, 2019.