1. Ozone Monitoring in Wyoming Cara Casten Wyoming Dept. of Environmental Quality – Air Quality Division March 10, 2004

2. Introduction Monitoring Data from both reference and non-reference method sites Photos of wildfire related ozone events

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

4. Ozone Monitors in Wyoming Thunder Basin National Grasslands Sponsor: WDEQ-AQD Period: 5/4/01-present Site: Part of visibility monitoring network in Northeastern Wyoming grasslands; other monitors at site include NOx, nephelometer, transmissometer, digital camera, meteorological, and IMPROVE aerosol. Reference Method?: Yes

5. Ozone Monitors in Wyoming Campbell County Sponsor: WDEQ-AQD Period: 7/16/03-present Site: Located south of Gillette in an area of high coalbed methane activity; other monitors at site include NOx, PM 10, and meteorological. Reference Method?: Yes

6. Ozone Monitors in Wyoming Green River Basin Visibility Site Sponsor: WDEQ-AQD Period: 08/01/98-12/31/01 Site: Part of visibility network in Green River Basin; other monitors at site include NOx, nephelometer, transmissometer, aerosol, optical and meteorological Reference Method?: Yes

7. Ozone Monitors in Wyoming Yellowstone National Park CASTNet Sponsor: NPS Period: 1996-present Site: Part of network at the “Near Water Tank” site close to the lake. Other monitors at site include IMPROVE aerosol, NADP wet deposition and meteorological Reference Method?: Yes Note: Data from this site was provided by the NPS-Air Resources Division

8. Ozone Monitors in Wyoming Pinedale CASTNet Sponsor: EPA Period: 1989-present Site: Located in Wind River Range outside of the town of Pinedale, close to the Bridger Wilderness Area (Class I). Reference Method?: No. Reference method monitor, but less strict maintenance. Note: Data from this site was provided by CASTNet

9. Ozone Monitors in Wyoming Centennial CASTNet Sponsor: EPA Period: 1989-present Site: Located in Snowy Range north of the front range of Colorado, close to the Savage Run Wilderness Area (Class I). Reference Method?: No. Reference method monitor, but less strict maintenance. Note: Data from this site was provided by CASTNet

10. Time series data for Green River Basin, Thunder Basin, and Yellowstone

14. Summary and Comparison of maximums from 2000, 2001, and 2002

15. 2000 Top 1 hr. and 8hr. Maximums Green River BasinYellowstone Date Time Conc. (ppm)Date TimeConc. (ppm) Top four 1 hour maximums 8/1/00 13:000.0865/30/00 16:000.074* 8/3/00 14:000.0867/31/00 17:000.073 8/1/00 12:000.0848/15/00 13:000.073 8/1/00 14:000.083**7/26/00 19:000.072** Top four 8 hour rolling average daily maximums 8/1/00 11:000.0817/31/00 14:000.070 8/3/00 10:000.0795/30/00 12:000.069 7/29/00 11:000.0788/1/00 13:000.067 7/30/00 10:000.074**6/7/00 14:000.065** * Value recorded 1 or more hrs. later in the day ** Value recorded 1 or more days later in the year

16. 2001 Top 1 hr. and 8hr. Maximums Green RiverThunder BasinYellowstone Date Time ppmDate Time ppmDate Timeppm Top four 1 hour maximums 8/13/01 13:000.082*8/8/01 11:000.0817/2/02 17:000.074 8/13/01 15:000.0808/25/01 14:000.0804/2/02 9:000.073 8/6/01 16:000.0798/25/01 15:000.079**5/4/02 18:000.073 8/13/01 12:000.0788/7/01 10:000.0787/2/02 18:000.072 Top four 8 hour rolling average daily maximums 8/6/01 11:000.0728/7/01 9:000.0754/2/02 10:000.070 8/12/01 11:000.0727/5/01 12:000.0735/4/02 13:000.070 8/13/01 10:000.0718/25/01 11:000.0708/29/02 12:000.066 2/18/01 12:000.0688/13/01 10:000.06907/1/02 15:000.066 * Value recorded 1 or more hrs. later in the day ** Value recorded 1 or more days later in the year

17. 2002 Top 1 hr. and 8hr. Maximums Thunder BasinYellowstone Date Time Conc. (ppm)Date TimeConc. (ppm) Top four 1 hour maximums 7/19/02 15:000.0967/2/02 17:000.074 7/19/02 13:000.0934/2/02 9:000.073 7/19/02 16:000.0925/4/02 18:000.073 7/19/02 12:000.088*7/2/02 18:000.072 Top four 8 hour rolling average daily maximums 7/19/02 10:000.0884/2/02 10:000.070 6/26/02 9:000.0755/4/02 13:000.070 7/16/02 9:000.0728/29/02 12:000.066** 7/18/02 11:000.07107/1/02 15:000.066** * Value recorded 1 or more hrs. later in the day ** Value recorded 1 or more days later in the year

18. 2000 Top 1 hr. and 8hr. Maximums CentennialPinedale 1 Date Time Conc. (ppm)Date TimeConc. (ppm) Top four 1 hour maximums 6/1/00 3:000.117/29/00 16:000.083 6/1/00 4:000.10*7/29/00 15:000.082* 6/1/00 6:000.0978/1/00 11:000.082 6/1/00 2:000.0927/29/00 17:000.081* Top four 8 hour rolling average daily maximums 6/1/00 1:000.0957/29/00 11:000.080 5/31/00 23:000.0908/1/00 9:000.078 8/2/00 3:000.0807/31/00 12:000.076 8/3/00 8:000.0798/2/00 10:000.073 *Value recorded 1 or more hrs. later in the day ** Value recorded 1 or more days later in the year 1 Data from CASTNet reported only 01/01/00 to 10/31/00

19. 2001 Top 1 hr. and 8hr. Maximums CentennialPinedale Date Time Conc. (ppm)Date TimeConc. (ppm) Top four 1 hour maximums 8/6/01 5:000.078*4/29/01 13:000.075* 8/6/01 2:000.0775/20/01 16:000.074 8/7/01 11:000.077*5/6/01 10:000.074 8/7/01 12:000.0768/6/01 16:000.074* Top four 8 hour rolling average daily maximums 8/7/01 6:000.0748/6/01 12:000.072 8/6/01 0:000.0745/6/01 9:000.071 8/5/01 23:000.0748/12/01 10:000.070 8/12/01 10:000.0714/29/01 9:000.069** * Value recorded 1 or more hrs. later in the day ** Value recorded 1 or more days later in the year

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

21. 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

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

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

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

25. Future Plans for WDEQ Ozone Monitoring in Wyoming Existing Monitors: WDEQ plans to continue monitoring at these sites. Proposed Monitoring: The Legislature is reviewing a request for funding for monitors in the following locations: 1.Jonah Field: Area of oil and gas development outside of Pinedale 2.Wamsutter: Area of oil and gas development in the south-central area of Wyoming 3.Newcastle: Downwind of coalbed methane development, on the border of South Dakota

26. Ozone Monitor Thunder Basin Campbell County CASTNet Pinedale CASTNet Centennial Green River Basin CASTNet Yellowstone Future Monitor Newcastle Wamsutter Jonah

27. Questions? ?