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Downtown street in the City of San Jose, County of Santa Clara
Santa Clara
Santa Clara County

Air Quality Fact

It is projected that even with anticipated gains in transit ridership and carpooling to work, the Bay Area is projected to have a minimum of 35% more (or 7.5 million additional) vehicular trips a year.

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BAAQMD Webcasts

Upcoming Webcasts

Particulate Matter Workshop to be Webcast live from 1:30pm to 4:00pm on 2/6/2012.
More Information:
Particulate Matter Planning

Workshop on Proposed Amendments to Regulation 2: Permits to be Webcast live from 10:00am to 12:00pm on 2/22/2012.
More Information:
Rule Workshops

Recent Webcasts

12/14/2011 Board of Directors Special Meeting
More Information:
12/14/2011 Agenda
(545 k PDF, 23 pgs)
Archives: Board Agendas, Minutes and Media

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Contacts

Individuals

  • Daphne Chong
  • Toxicologist, Engineering
  • 415 749-4687
  • Scott Lutz
  • Air Quality Engineering Manager, Engineering
  • 415 749-4676

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Engineering

415 749-4990

Engineering Contacts
Full BAAQMD Directory

Toxic Air Contaminant Trigger Levels

New Source Review of Toxic Air Contaminants:

The following link is an Adobe Acrobat copy of Table 2-5-1 (80 k PDF, 12 pgs) from Regulation 2 Rule 5, New Source Review of Toxic Air Contaminants.

This table lists Toxic Air Contaminants (TAC) and their trigger levels. Regulation 2, Rule 5 specifies that all permit applications for new and modified sources must be screened for emissions of TACs. If any project emits TACs in amounts that exceed the listed trigger levels, a site-specific Health Risk Screening Analysis (HRSA) is completed by District staff. Estimates of public exposure, and cancer and non-cancer health risk, are made for the maximally exposed residential and off-site worker receptor locations and compared to risk standards (Regulation 2-5-301 and 302). If the emissions from a project are less than the listed trigger-levels, it is assumed that the project does not pose a significant risk to the public and a HRSA is not performed.

Permit Exemptions

If TAC emissions are equal or greater than one or more of the trigger-levels, a HRSA may be necessary to determine if a source is exempt from permit requirements (see Regulation 2-1-316).

Last Updated: 10/4/2010