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Staff of the Air Resources Board (ARB) and Office of Environmental Health Hazard Assessment (OEHHA) reviewed the scientific literature regarding the health effects of ozone (O3) and considered revisions to the Ozone Ambient Air Quality Standard based on the literature review.  Proposed recommendations are presented.

Final Statement of Reasons for specific regulatory levels posing no significant risk for eight chemicals listed as known to the State to cause cancer (benz[a]anthracene, benzene, benzo[b]fluoranthene, benzo[j]fluoranthene, bromoform, chrysene, 7H-dibenzo[c,g]carbazole, dibenzo[a,h]pyrene, dibenzo[a,i]pyrene, and 5-methylchrysene).

Chemicals Listed Effective June 11, 2004 as Known to the State of California to Cause Cancer: 3,3'-dimethoxybenzidine-based dyes metabolized to 3,3'-dimethoxybenzidine, 3,3'-dimethylbenzidine-based dyes metabolized to 3,3'-dimethylbenzidine, ethylbenzene, propylene glycol mono-t-butyl ether, and thiouracil

Availability of the draft prioritization process document for public review and comment.

Chemicals under consideration for possible listing as known to cause reproductive toxicity via the Authoritative Bodies mechanisms: Request for relevant information on five chemicals.

Request for comments on proposed listing of Aristolochic acids and herbal remedies containing plant species of the genus Aristolochia as known to cause cancer

Chemical listed effective May 7, 2004 as known to the state of California to cause cancer: Nickel compounds.

Information about relative source contribution (RSC) and its derivation (presented as a poster at the 43rd annual meeting of the Society of Toxicology, Baltimore, Maryland, March 21-25, 2004.

OEHHA has provided a number of comments on the risk characterization and the exposure assessment methodology and conclusions on the draft RCD and EAD for Sulfuryl Fluoride.

Final Statement of Reasons. The regulation adopts regulatory levels for two chemicals included in the Notice of Proposed Rulemaking, benzene and bromoform.