Natural/Exceptional Events

CAUTION:  SOME FILES MAY BE IN EXCESS OF 5 MB

The Final “Treatment of Data Influenced by Exceptional Events” Rule (40 CFR 50.14) allows the state to request a data flag and justify the flag by submitting documentation showing that exceedances of the National Ambient Air Quality Standards (NAAQS) would not have occurred in the absence of a natural event.  The following table includes all Natural/Exceptional Event packets on public notice or submitted to United Sates Environmental Protection Agency (EPA) Region 8.
 

Natural/Exceptional Event

Event Documentation

Public Comment Due Date *
Sinclair Refinery, Carbon County WY, SO2 Exceptional Event
April 20, 22-23, 25-27, May 4, and June 24, 2011		 pdficons.gif (172 bytes) June 13, 2012
South Pass, WY; O3 Stratospheric Intrusion Events
February 27-28, March 6-7, and March 10-13, 2009		 pdficons.gif (172 bytes) Closed
Black Butte Coal Mine, Sweetwater Co. WY; PM10
January 1, 2009		 pdficons.gif (172 bytes) Closed
Black Butte Coal Mine, Sweetwater Co. WY; PM10
May 12, 2009		 pdficons.gif (172 bytes) Closed

 

* Please direct all comments to Ms. Cara Keslar, Monitoring Section Supervisor, 122 West 25th Street 2-E, Cheyenne, WY  82002.

Packets submitted prior to 2009 can be obtained by sending an email request to cara.keslar@wyo.gov.