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Ozone Monitoring in Wyoming
Cara CastenWyoming Dept. of Environmental
Quality – Air Quality DivisionMarch 10, 2004
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Introduction
• Monitoring
• Data from both reference and non-reference method sites
• Photos of wildfire related ozone events
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Ozone Monitor
Thunder Basin
Campbell County
CASTNetPinedale
CASTNetCentennial
Green River Basin
CASTNetYellowstone
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Time series data for Green River Basin, Thunder Basin,
and Yellowstone
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YNP Monthly O3 data 01/01/99-09/30/03
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14D
ec-9
8
May
-99
Oct
-99
Mar
-00
Aug
-00
Jan-
01
Jun-
01
Nov
-01
Apr
-02
Sep
-02
Jan-
03
Jun-
03
O3
Co
nc.
pp
m
1 hr. Monthly Avg. 1 hr. max 8 hr. max
1 hr. Standard
8 hr. Standard
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Green River Basin Monthly O3 data 01/01/99-12/31/01
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14D
ec-
98
Ma
y-9
9
Oct
-99
Ma
r-0
0
Au
g-0
0
Jan
-01
Jun
-01
No
v-0
1
O3
Co
nc
. pp
m
1 hr. Monthly Avg. 1 hr. max 8 hr. max
1 hr. Standard
8 hr. Standard
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Thunder Basin Monthly O3 data 05/04/01-09/30/03
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14A
pr-0
1
Sep
-01
Feb
-02
Jul-0
2
Dec
-02
May
-03
Oct
-03
O3
Co
nc.
pp
m
1 hr monthly average 1hr. max 8 hr. max
1 hr. Standard
8 hr. Standard
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Summary and Comparison of maximums from 2000, 2001,
and 2002
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2000 Top 1 hr. and 8hr. MaximumsGreen River Basin YellowstoneDate Time Conc. (ppm) Date Time Conc. (ppm)
Top four 1 hour maximums
8/1/00 13:00 0.086 5/30/00 16:00 0.074*
8/3/00 14:00 0.086 7/31/00 17:00 0.073
8/1/00 12:00 0.084 8/15/00 13:00 0.073
8/1/00 14:00 0.083** 7/26/00 19:00 0.072**
Top four 8 hour rolling average daily maximums
8/1/00 11:00 0.081 7/31/00 14:00 0.070
8/3/00 10:00 0.079 5/30/00 12:00 0.069
7/29/00 11:00 0.078 8/1/00 13:00 0.067
7/30/00 10:00 0.074** 6/7/00 14:00 0.065**
*Value recorded 1 or more hrs. later in the day
** Value recorded 1 or more days later in the year
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2001 Top 1 hr. and 8hr. Maximums
Green River Thunder Basin YellowstoneDate Time ppm Date Time ppm Date Time ppm
Top four 1 hour maximums
8/13/01 13:00 0.082* 8/8/01 11:00 0.081 7/2/02 17:00 0.074
8/13/01 15:00 0.080 8/25/01 14:00 0.080 4/2/02 9:00 0.073
8/6/01 16:00 0.079 8/25/01 15:00 0.079** 5/4/02 18:00 0.073
8/13/01 12:00 0.078 8/7/01 10:00 0.078 7/2/02 18:00 0.072
Top four 8 hour rolling average daily maximums
8/6/01 11:00 0.072 8/7/01 9:00 0.075 4/2/02 10:00 0.070
8/12/01 11:00 0.072 7/5/01 12:00 0.073 5/4/02 13:00 0.070
8/13/01 10:00 0.071 8/25/01 11:00 0.070 8/29/02 12:00 0.066
2/18/01 12:00 0.068 8/13/01 10:00 0.069 07/1/02 15:00 0.066
*Value recorded 1 or more hrs. later in the day
** Value recorded 1 or more days later in the year
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2002 Top 1 hr. and 8hr. MaximumsThunder Basin Yellowstone
Date Time Conc. (ppm) Date Time Conc. (ppm)
Top four 1 hour maximums
7/19/02 15:00 0.096 7/2/02 17:00 0.074
7/19/02 13:00 0.093 4/2/02 9:00 0.073
7/19/02 16:00 0.092 5/4/02 18:00 0.073
7/19/02 12:00 0.088* 7/2/02 18:00 0.072
Top four 8 hour rolling average daily maximums
7/19/02 10:00 0.088 4/2/02 10:00 0.070
6/26/02 9:00 0.075 5/4/02 13:00 0.070
7/16/02 9:00 0.072 8/29/02 12:00 0.066**
7/18/02 11:00 0.071 07/1/02 15:00 0.066**
*Value recorded 1 or more hrs. later in the day
** Value recorded 1 or more days later in the year
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2000 Top 1 hr. and 8hr. Maximums
Centennial Pinedale1
Date Time Conc. (ppm) Date Time Conc. (ppm)
Top four 1 hour maximums
6/1/00 3:00 0.11 7/29/00 16:00 0.083
6/1/00 4:00 0.10* 7/29/00 15:00 0.082*
6/1/00 6:00 0.097 8/1/00 11:00 0.082
6/1/00 2:00 0.092 7/29/00 17:00 0.081*
Top four 8 hour rolling average daily maximums
6/1/00 1:00 0.095 7/29/00 11:00 0.080
5/31/00 23:00 0.090 8/1/00 9:00 0.078
8/2/00 3:00 0.080 7/31/00 12:00 0.076
8/3/00 8:00 0.079 8/2/00 10:00 0.073*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
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2001 Top 1 hr. and 8hr. Maximums
Centennial PinedaleDate Time Conc. (ppm) Date Time Conc. (ppm)
Top four 1 hour maximums
8/6/01 5:00 0.078* 4/29/01 13:00 0.075*
8/6/01 2:00 0.077 5/20/01 16:00 0.074
8/7/01 11:00 0.077* 5/6/01 10:00 0.074
8/7/01 12:00 0.076 8/6/01 16:00 0.074*
Top four 8 hour rolling average daily maximums
8/7/01 6:00 0.074 8/6/01 12:00 0.072
8/6/01 0:00 0.074 5/6/01 9:00 0.071
8/5/01 23:00 0.074 8/12/01 10:00 0.070
8/12/01 10:00 0.071 4/29/01 9:00 0.069**
*Value recorded 1 or more hrs. later in the day
** Value recorded 1 or more days later in the year
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Thunder BasinOzone measurements and
corresponding images when wildfires burned in northeast
Wyoming
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Thunder Basin July 5, 2001
12:00 pm
SVR = 87 km
O3 = 68 ppb
15:00 pm
SVR = 59 km
O3 = 77 ppb
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July 19, 2002
10:15 am
SVR = 130 km
O3 = 78 ppb
11:45 am
SVR = 54 km
O3 = 86 ppb
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July 19, 2002 (12:00-12:45 pm)
SVR = 23 km O3 = 88 ppb
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July 19, 2002 (3:00-3:45 pm)
SVR = 58 km O3 = 96 ppb (highest O3 value in 2002)
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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
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Ozone Monitor
Thunder Basin
Campbell County
CASTNetPinedale
CASTNetCentennial
Green River Basin
CASTNetYellowstone
Future Monitor
Newcastle
Wamsutter
Jonah
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Questions?
?