Toxic Air Contaminants
According to section 39655 of the California Health and Safety Code, a toxic air contaminant (TAC) is "an air pollutant which may cause or contribute to an increase in mortality or an increase in serious illness, or which may pose a present or potential hazard to human health." In addition, substances which have been listed as federal hazardous air pollutants (HAPs) pursuant to section 7412 of Title 42 of the United States Code are TACs under the state's air toxics program pursuant to section 39657 (b) of the California Health and Safety Code. The Air Resources Board formally made this identification on April 8, 1993 (Title 17, California Code of Regulations, section 93001).
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Toxic Air Contaminant News
OEHHA released a draft version of the Air Toxics Hot Spots Program Guidance Manual for the Preparation of Risk Assessments for public comment, and held accompanying workshops.
OEHHA released a second draft of Air Toxics Hot Spots Program Risk Assessment Guidelines: Technical Support Document for Exposure Assessment and Stochastic Analysis for review by the Scientific…
OEHHA announced its revised Reference Exposure Levels for nickel and nickel compounds following its approval by the Scientific Review Panel.
OEHHA released revised draft Reference Exposure Levels for Caprolactam and Nickel for review by the Scientific Review Panel.
The Scientific Review Panel on Toxic Air Contaminants met to review OEHHA's draft documents on the Use of the Toxicity Equivalency Factor (TEFWHO‑97 and TEFWHO‑05) Scheme for Estimating Toxicity of…
The Scientific Review Panel for Toxic Air Contaminants met to review OEHHA's revised Technical Support Document for Cancer Potency Factors.
The Scientific Review Panel for Toxic Air Contaminants reviewed OEHHA's draft Reference Exposure Level documents for acetaldehyde, acrolein, arsenic, formaldehyde, manganese, and mercury, as well as…
The Scientific Review Panel for TACs discussed OEHHA's updated draft of the Technical Support Document for Cancer Potency Factors and the documentation for proposed new RELs for acetaldehyde,…
List of Toxic Air Contaminants as of July 2008. Links to the complete staff reports are provided.
OEHHA adopted a unit risk value and an inhalation cancer potency value for ethylbenzene, for estimating cancer risk associated with inhalation exposures.