"Exceptional Events Documentation Packages
Data impacted by an exceptional event may be excluded from use in determining compliance with the National Ambient Air Quality Standards (NAAQS) when they meet certain criteria defined in 40 CFR § 50.14 - "Treatment of air quality monitoring data influenced by exceptional events". Exceptional events are defined as events that occur and impact air quality that cannot be controlled by human intervention and that are not expected to reoccur, such as wildfires. To exclude data impacted by an exceptional event the agency must demonstrate to the Environmental Protection Agency that the event occurred, the event impacted the monitor, the value measured was not what would have been expected for that location and season (i.e., it was atypical), and that the NAAQS would not have been exceeded if that event had not occurred. The following fine particle exceptional events documentation packages have been prepared and submitted to EPA:
- Site Prep Burn N102005-11 in South Carolina, Prescribed Burn, October 2005, affecting two exceedances in the Mecklenburn County Local Program Area [PDF]
- Shortoff Fire, Prescribed Burn, March 2007, affecting one exceedance and causing higher values in Swain County as follows:
| County |
Exceedance
Date |
City |
Station Name |
Station Id |
Report |
| Swain |
3/22/2007 |
Bryson City |
Bryson |
37-173-0002 |
[PDF] |
| Swain |
3/28/2007 |
Bryson City |
Bryson |
37-173-0002 |
[PDF] |
- Fires in Georgia, Wildfires, May 2007, affecting one exceedance in Robeson County [PDF]
- Fort Bragg Burn, Prescribed Burn, June 2007, affecting one exceedance in Wake County [PDF]
- Dobson and Shortoff Fires, Wildfires, June 2007, affecting two exceedances in Mitchell County as follows:
| County |
Exceedance
Date |
City |
Station Name |
Station Id |
Report |
| Mitchell |
6/11/2007 |
Spruce Pine |
Spruce Pine |
37-121-0001 |
[PDF] |
| Mitchell |
6/14/2007 |
Spruce Pine |
Spruce Pine |
37-121-0001 |
[PDF] |
- Local Fires, Wildfires, August 2007, affecting one exceedance in Robeson County [PDF]
- Idaho/Montana/Canadian Fires, Wildfires, 2006 to 2007, affecting scattered exceedances and causing higher values in State and Local Program Monitoring Stations as follows:
- State
| County |
Exceedance
Date |
City |
Station Name |
Station Id |
Report |
| Davidson |
8/4/2007 |
Lexington |
Lexington |
37-057-0002 |
[PDF] |
| Catawba |
8/5/2007 |
Hickory |
Hickory |
37-035-0004 |
[PDF] |
| Wake |
8/5/2007 |
Raleigh |
Millbrook |
37-183-0014 |
[PDF] |
| Guilford |
8/5/2007 |
Greensboro |
Mendenhall |
37-081-0013 |
[PDF] |
- Local Program
| County |
Exceedance
Date |
City |
Station Name |
Station Id |
Report |
| Mecklenburg |
7/1/2006 |
Charlotte |
Garinger |
37-119-0041 |
[PDF] |
| Mecklenburg |
7/1/2006 |
Charlotte |
Oakdale |
37-119-0043 |
[PDF] |
| Mecklenburg |
8/5/2007 |
Charlotte |
Garinger |
37-119-0041 |
[PDF] |
| Mecklenburg |
8/5/2007 |
Charlotte |
Oakdale a |
37-119-0043 |
[PDF] |
| Mecklenburg |
8/6/2007 |
Charlotte |
Garinger |
37-119-0041 |
[PDF] |
| Mecklenburg |
8/6/2007 |
Charlotte |
Oakdale a |
37-119-0043 |
[PDF] |
| Mecklenburg |
8/17/2007 |
Charlotte |
Garinger |
37-119-0041 |
[PDF] |
| Mecklenburg |
8/17/2007 |
Charlotte |
Oakdale |
37-119-0043 |
[PDF] |
| Mecklenburg |
9/5/2007 |
Charlotte |
Garinger |
37-119-0041 |
[PDF] |
| Mecklenburg |
9/5/2007 |
Charlotte |
Oakdale |
37-119-0043 |
[PDF] |
a Oakdale did not exceed the PM2.5 daily standard on 8/5/07 and 8/6/07. |
