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OEHHA adopted a unit risk value of 3.4 x 10^-5 (µg/m³)^-1 and slope factor of 1.2 x 10^-1 (mg/kg-day)^-1 for estimating the cancer risk associated with inhalation exposures to naphthalene. These values are based on data for incidence of nasal tumors in male rats after naphthalene exposure.

OEHHA announced intention to initiate risk assessments in 2004 for the following chemicals: bromate, chlorite, haloacetic acids, and nitrosodimethylamine (NMDA).  Additionally, OEHHA announced intention to update reviews for the following chemicals: cadmium, copper, glyphosate, lindane, mercury, methoxychlor, oxamyl, pentachlorophenol, thallium, and trichloroethylene.

Notice of Intent to List Chemical - Vanadium Pentoxide meets the criteria for listing under Title 22, Cal. Code of Regs., section 1230, for listing as causing cancer under the authoritative bodies mechanism

Extension of public comment period on five chemicals under consideration for possible listing as known to cause reproductive toxicity via the authoritative bodies mechanisms.

Chemicals listed effective July 9, 2004 as known to the state of California to cause cancer: “aristolochic acids” and “herbal remedies containing plant species of the genus Aristolochia".

OEHHA announces a public comment period for the draft Public Health Goals for radium-226 and -228, strontium-90, and tritium in drinking water.

The Office of Environmental Health Hazard Assessment proposes to establish specific regulatory levels posing no significant risk for 1,2-dichloropropane and naphthalene.  OEHHA also proposes to establish specific regulatory levels for 1,2-dibromo-3-chloropropane, disodium cyanodithioimidocarbonate, ethyl dipropylthiocarbamate, ethylene glycol monomethyl ether, ethylene glycol monomethyl ether acetate, methyl bromide as a structural fumigant, sodium dimethyldithiocarbamate and thiophanate-methy.

Request for relevant information on 2,4-Hexadienal (89% trans, trans isomer;11% cis, trans isomer) for possible listing via the Authoritative Bodies mechanism.

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).