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OEHHA released a revised draft with unit risk value for naphthalene, which was ammeneded in response to comments received during the comment period.  

In response to public comments, OEHHA released a revised version of its draft Chronic Reference Exposure Levels for silica (crystalline, respirable).

OEHHA announced availability of this draft report for review and comment.

Request for information on chemicals to be considered by the Carcinogen Identification Committee.

OEHHA announced that the public health goal (PHG) for perchlorate in drinking water was identified as 6 ppb (parts per billion).

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.

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.

The Public Health Goal for perchlorate was finalized and the technical support document was made available.

This 2004 draft report is required by the California Land Environmental Restoration and Reuse Act (Escutia, Chapter 764, Statues of 2001) as part of the effort to develop soil screening numbers for a specific set of contaminants.

Availability of final data summaries and priorities for chemicals with respect to their evaluation by the OEHHA Science Advisory Board’s Carcinogen Identification Committee.