1. Wyoming Rural Ozone Monitoring WRAP – IOC Meeting July 21-22, 2003 Denver, CO

2. Ozone Monitor Thunder Basin Campbell County CASTNet Pinedale CASTNet Centennial Green River Basin CASTNet Yellowstone

3. Rural Ozone Monitoring in WY NetworkSiteStart DateStop Date CASTNetCentennialJuly 1989Ongoing CASTNetPinedaleJan. 1989Ongoing CASTNetYellowstoneJune 1996Ongoing WDEQGreen River Basin August 1998Dec. 2001 WDEQThunder BasinMay 2001Ongoing WDEQCampbell County July 2003Ongoing

4. Wyoming Max. Daily 8-hr O 3 Summary SiteYearsAverages (ppm)Valid Days 1 st 2 nd 3 rd 4 th Thunder Basin20010.075 0.0730.07099% Thunder Basin20020.0880.0750.0740.07298% Yellowstone1999-20010.0720.0700.0680.06799% Yellowstone2000-20020.0690.0680.0660.06597% Green River Basin1999-20010.0780.0730.0710.06999% 8-hr O 3 AAQS 0.08 ppm annual 4 th -highest daily max. 8-hr avg.

5. Thunder Basin Ozone measurements and corresponding images when wildfires burned in northeast Wyoming

6. Thunder Basin July 5, 2001 12:00 pm SVR = 87 km O 3 = 68 ppb 15:00 pm SVR = 59 km O 3 = 77 ppb

7. July 19, 2002 10:15 am SVR = 130 km O 3 = 78 ppb 11:45 am SVR = 54 km O 3 = 86 ppb

8. July 19, 2002 (12:00-12:45 pm) SVR = 23 km O 3 = 88 ppb

9. July 19, 2002 (3:00-3:45 pm) SVR = 58 km O 3 = 96 ppb (highest O 3 value in 2002)