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"The purpose of the exceptional events rule is to ensure that regulatory decisions under the Clean Air Act are not biased by monitored air quality data over which a state has little or no control."
EPA September 2016 Final Rule and Guidance
EPA's Exceptional Events Rule and Guidance
EPA 11/10/2015 Proposed Rule Revisions and Wildfire Guidance
Proposed rule revision
including preamble (11/20/2015)
Proposed rule revision text only
Exceptional Events Guidance
- Ozone from Wildfires
Fact Sheet
EPA's
exceptional events webpage
Laws, Regulations and Guidance
Statutory language
(SAFETEA-LU Sec 6013)
Treatment of Data Influenced by Exceptional Events; Final Rule
(3/22/2007)
Exceptional events guidance memo from Steve Page
(5/10/2013)
L
ink to EPA webpage with links to final documents
(May 2013)
Final Exceptional Events Rule FAQ
- underline/strikeout version (5/10/2013)
May 2011 draft
Exceptional Events Rule FAQ
Final high wind EER guidance
- underline/strikeout version (5/10/2013)
Draft guidance - Preparation of documentation for high wind events
(May 2011)
Fact sheet on final high wind EER guidance documents
(5/13/2013)
Overview of draft guidance documents
(May 2011)
Harnett memo
- May 2009 memo on EER applied to PM10 limited maintenance plan option
O3 data flagging
- 5/19/09 final rule revising dates for flagging 8-hour ozone data
EPA qualifier codes for air quality data
Natural Events Policy
(May 1996)
Interim Policy on Wildland and Prescribed Fires
Federal Clean Air Act
(link to EPA site)
Comments/Recommendations
WESTAR comments on Exceptional Events
WESTAR 2016 comments on proposed revisions to EER and Guidance
-January 29, 2016
WESTAR testimony at December 8, 2015 public hearing
WESTAR 2011 comments on EPA exceptional events implementation draft guidance
- June 2011
WESTAR 2010 follow up letter on 9/11/09 recommendations
- July 6, 2010
WESTAR 2009 recommendations for improving implementation on the EER
- September 11,2009
WESTAR recommendations to EPA on pending update to Wildland Fire Policy
- December 2007
WESTAR comments on EPA's Exceptional Events proposal
- May 25, 2006
WESTAR public hearing testimony on EPA's Exceptional Events proposal
- April 25, 2006
State and local comments on 2011 Draft guidance:
Maricopa Association of Governments
NACAA
SCAQMD, CA
Arizona
Imperial County, CA
CAPCOA
Clark County, NV
Calfornia ARB
Great Basin APCD, CA
San Joaquin Valley, CA
Wyoming
Washington
Meetings/Workshops/Presentations
Ozone and Wildfire Exceptional Events meeting
- March 5-6, 2013
Status of Regional Office responses to EE requests
- Don Arkell, Fall 2012 WESTAR meeting
Lessons Learned in Arizona
- Eric Massey presentation, Fall 2012 WESTAR meeting
Status of EPA EER Guidance development
- Colleen McKaughan presentation, Fall 2011 WESTAR meeting
EPA status report
- Scott Mathias presentation, Fall 2010 WESTAR meeting
Additional Information
WESTAR State Exceptional Events tracking table
Link to EPA webpage with example exceptional events requests
WESTAR questions to EPA on Natural Events Policy
(12/3/2003)
EPA response to questions on Natural Events Policy
(Spring 2004)
WESTAR recommendations on 1998 Interim Air Quality Policy on Wildland and Prescribed Fires
(12/26/07)
Webpage: Natural Events Policy
(pre-exceptional events discussions)
EPA approval of Flint Hills EER request, 8-hour O3 from prescribed burning