Draft Reference Exposure Levels for Carbonyl Sulfide

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The Office of Environmental Health Hazard Assessment (OEHHA) is releasing a draft document for review by the State's Science Review Panel on Toxic Air Contaminants (SRP). The SRP review draft document summarizes the toxicity and derivation of Reference Exposure Levels (RELs) for Carbonyl Sulfide. This document is for review and comment by the Science Review Panel at their meeting on June 19, 2015. RELs are airborne concentrations of a chemical that are not anticipated to result in adverse non–cancer 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 response to this statutory requirement, OEHHA develops RELs for many air pollutants. The Carbonyl Sulfide RELs were developed using the most recent "Air Toxics Hot Spots Program Technical Support Document for the Derivation of Noncancer Reference Exposure Levels," finalized by OEHHA in 2008.

The draft document was released for a 60-day public review and comment period on October 17, 2014. No comments were received during this comment period.

The SRP review draft document is being release to the public, but we are not seeking further comments from the public on the draft document at this time.

Please direct any inquiries concerning technical matters or availability of the documents to:

Dr. John Budroe
Chief, Air Toxicology and Risk Assessment Section
Air, Community, and Environmental Research Branch
Office of Environmental Health Hazard Assessment
1515 Clay Street, 16th Floor Oakland, CA, 94612

E–mail: John.Budroe@oehha.ca.gov
Telephone: (510) 622-3145

Information about dates and agenda for meetings of the Scientific Review Panel can be obtained from the California Air Resources Board web page at: http://www.arb.ca.gov/srp/srpmeetings.htm.