Update to the Toxic Air Contaminant (TAC) List - Final

This page last reviewed April 8, 2011


Final Staff Report

In December 1999, the Air Resources Board (ARB) completed the final staff report, Update to the Toxic Air Contaminant List. The List represents our priorities for identifying and regulating substances as directed by State law. The report describes the process followed by the ARB in reviewing and revising the Toxic Air Contaminant List, and presents changes to the List.

Our review included using a ranking system, and consulting with the local air pollution control districts, Office of Environmental Health Hazard Assessment, Scientific Review Panel, and Department of Pesticide Regulation. Additional changes were also made in response to two public review and comment periods.

The Substance by Category version, the December 1999 Toxic Air Contaminant List, is divided into six categories and is designed to tell the reader: 1) whether a substance is emitted in California; 2) if a substance has a health number developed, or that a health number is being developed, under the AB 2588 Air Toxics “Hot Spots” Information and Assessment Act of 1987; and 3) the status of the substance in the identification process. There is also a quick reference guide that is similar to the June 1996 list. It can be used to easily determine if a substance is on the Toxic Air Contaminant List and in what category it can be found on the Substances By Category version of the list.

If you have any questions, or would like to request a copy of appendices D, I, or J which are not available on this website, please call the Air Quality Measures Branch at (916) 445-6318.


Report and Appendices

WordPerfect

PDF Format

Staff Report

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122K

Appendix A
June 1996 Toxic Air Contaminant List

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Appendix B
December 1999 Toxic Air Contaminant List

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Appendix C
Prioritization Scheme

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Appendix D
Public Comment Letters from the December 15, 1998 and January 20, 1999 Comment Periods

Not Available
on Website

Not Available
on Website

Appendix E
Responses to Comments Received During December 1998 - February 1999 Comment Period

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Appendix F
Fact Sheets for the Substances Nominated for Review
   
  • Crystalline Silica 
  • Methyl Tert-Butyl Ether 
  • Polycyclic Aromatic Hydrocarbons 
  • Styrene 

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Appendix G
Federal Register Notice on Caprolactam

Not Available

62K

Appendix H
The U.S. Environmental Protection Agency has issued its Modifications to the Section 112(b)1 Hazardous Air Pollutants. For the most recent link to this document, please see the U.S. EPA website.

Not Available

Not Available

Appendix I
December 30, 1996, Letter from BASF Corporation Regarding Caprolactam

Not Available
on Website

Not Available
on Website

Appendix J
Memorandum from Office of Environmental Health Hazard Assessment to ARB on Health Effects of Caprolactam

Not Available on Website

1.03MB


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