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Notice of Intent to List: 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 for listing as causing cancer under the authoritative bodies mechanism
Apr 9, 2004, Program: Proposition 65
This document is one of a series of technical resources and tools prepared by the Ecotoxicology Unit (OEHHA) as part of our goal of advancing the science and practice of ecological risk assessment.
Apr 1, 2004, Program: Ecotoxicology
OEHHA released a revised draft with unit risk value for naphthalene, which was ammeneded in response to comments received during the comment period.
Mar 18, 2004, Program: Air
In response to public comments, OEHHA released a revised version of its draft Chronic Reference Exposure Levels for silica (crystalline, respirable).
Mar 18, 2004, Program: Air
OEHHA announced that the public health goal (PHG) for perchlorate in drinking water was identified as 6 ppb (parts per billion).
Mar 12, 2004, Program: Water
OEHHA has provided a number of comments on the risk characterization methodology and conclusions on the draft RCD for the Active Ingredient Tetrahydro-5,5-dimethyl-2 (1H)-pyrimidinone {3[4-(trifluoromethyl) phenyl]-1-[2-(4-trifluoromethyl) phenyl] ethenyl]-2-propenylidene} hydrazone (hydramethylnon). These comments and our recommendations, as well as suggested clarifications, additions and corrections, are contained in the attachment.
Mar 12, 2004, Program: Pesticides
OEHHA has provided a number of comments on the risk characterization and the exposure assessment methodology and conclusions on the draft addendum to RCD and EAD for Methidathion. These comments and our recommendations, as well as suggested clarifications, additions and corrections, are contained in the attachment.
Mar 12, 2004, Program: Pesticides
Availability of final data summaries and priorities for chemicals with respect to their evaluation by the OEHHA Science Advisory Board’s Carcinogen Identification Committee.
Mar 12, 2004, Program: Proposition 65
OEHHA announced availability of this draft report for review and comment.
Mar 12, 2004, Program: Risk Assessment
The Public Health Goal for perchlorate was finalized and the technical support document was made available.
Mar 12, 2004, Program: Water