Air Toxics Hot Spots
The Air Toxics "Hot Spots" Information and Assessment Act (AB 2588, Connelly) was enacted in 1987, and requires stationary sources of pollutants to report the types and quantities of certain substances routinely released into the air. The goals of the Air Toxics "Hot Spots" Act are to collect emission data, to identify facilities having localized impacts, to ascertain health risks, to notify nearby residents of significant risks, and to reduce those significant risks to acceptable levels.
Guideline Values for Health Risk Assessment
- Hot Spots Unit Risk and Cancer Potency Values
- Acute, 8-hour, and Chronic Reference Exposure Level (RELs)
Current Hot Spots Guidelines Technical Support Documents
Hot Spots Reports, Notices and Documents
Apr 29, 2009: Meeting of the Scientific Review Panel for Toxic Air Contaminants on May 12, 2009
The Scientific Review Panel for Toxic Air Contaminants met to review OEHHA's revised Technical Support Document for Cancer Potency Factors.
Dec 19, 2008: Notice of Adoption of Air Toxics Hot Spots Program Technical Support Document for the Derivation of Noncancer Reference Exposure Levels and 6 RELs
Noncancer Reference Exposure Levels (RELs) Guidance - 2008 version
Nov 25, 2008: Meeting of the Scientific Review Panel for Toxic Air Contaminants on December 5, 2008
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...
Oct 10, 2008: Meeting of the Scientific Review Panel for Toxic Air Contaminants on October 30, 2008
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,...
Jul 18, 2008: Draft Technical Support Document for Noncancer Risk Assessment Jul 2008
OEHHA released a revised draft of the Technical Support Document for Noncancer Risk Assessment, reflecting discussion that took place at the June 2008 SRP meeting.
Jun 20, 2008: Notice of Public Comment/Workshops for Draft Technical Support Document for Cancer Potency Factors 2008
OEHHA released for public comment a draft of Technical Support Document for Cancer Potency Factors.
Jun 12, 2008: Draft Technical Support Document for Noncancer Risk Assessment Jun 2008
OEHHA released a revised draft of the Technical Support Document for Noncancer Risk Assessment, which reflects responses to comments posed in the May 2008 SRP meeting, as well as a revised manganese...
Apr 24, 2008: Draft Technical Support Document for Noncancer Risk Assessment Apr 2008
OEHHA released a revised draft of the Technical Support Document for Noncancer Risk Assessment which reflects new data and comments from the public and Scientific Review Panel.
Dec 19, 2007: Extension of Public Comment Period on Draft Air Toxics Hot Spots Program Technical Support Document for Noncancer Risk Assessment Dec 2007
OEHHA extended the public comment period for its draft Air Toxics Hot Spots Program Technical Support Document For the Derivation of Noncancer Reference Exposure Levels.
Nov 14, 2007: Adoption of a Unit Risk Value for Ethylbenzene
OEHHA adopted a unit risk value and an inhalation cancer potency value for ethylbenzene, for estimating cancer risk associated with inhalation exposures.