UNITED STATES ENVIRONMENTAL PROTECTION AGENCY DESIGN VALUE REPORT Aug. 12, 2010 Report Request ID: 781021 Report Code: AMP480

Selection Criteria Page 1 User ID: HDY

State County City

Site Parameter POC AQCR UAR CBSA CSA EPA Region Method Duration Begin Date End Date 56 GEOGRAPHIC SELECTIONS

PROTOCOL SELECTIONS Parameter Classification Parameter Method Duration DESIGN VALUE SELECTED OPTIONS USER SITE METADATA MERGE PDF FILES QUARTERLY DATA IN WORKFILE WORKFILE DELIMITER SINGLE EVENT PROCESSING Option Type Option Value STREET ADDRESS YES NO , EXCLUDE REGIONALLY CONCURRED EVENTS GLOBAL DATES 1999 Start Date End Date 2009 Tribal

APPLICABLE STANDARDS Standard Description Ozone 8-Hour 2008 PM10 24-hour 2006 PM25 24-hour 2006 PM25 Annual 2006UNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 1 of 86 

### Pollutant: Standard Units: .075 Level: Ozone 8-Hour 2008 NAAQS Standard: Annual 4th Maximum Statistic:

1 Poc 218 Valid Days 99 Percent Complete .071

4th Max Cert 210

Valid Days 98 Percent Complete .066

4th Max Cert 191

Valid Days 89 Percent Complete .061

4th Max Cert 95

Percent Complete .066

Design Value Y

D. V. Validity 

### Ozone(44201) Parts per million(007)

Site ID | | | | | | | | | | | | 56-039-1011 

### REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. Design Value Year: 1999

STREET ADDRESS 1998 1997 

### Wyoming State:

YELLOWSTONE NATIONAL PARK 1999 3 - YearUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 2 of 86 

### Pollutant: Standard Units: .075 Level: Ozone 8-Hour 2008 NAAQS Standard: Annual 4th Maximum Statistic:

1 Poc 209 Valid Days 98 Percent Complete .065

4th Max Y

Cert 218

Valid Days 99 Percent Complete .071

4th Max Cert 210

Valid Days 98 Percent Complete .066

4th Max Cert 98

Percent Complete .067

Design Value Y

D. V. Validity 

### Ozone(44201) Parts per million(007)

Site ID | | | | | | | | | | | | 56-039-1011 

### REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. Design Value Year: 2000

STREET ADDRESS 1999 1998 

### Wyoming State:

YELLOWSTONE NATIONAL PARK 2000 3 - YearUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 3 of 86 

### Pollutant: Standard Units: .075 Level: Ozone 8-Hour 2008 NAAQS Standard: Annual 4th Maximum Statistic:

1 1 Poc 178 211 Valid Days 83

99 Percent Complete .069

.066 4th Max

Y

Cert

209

Valid Days

98 Percent Complete

.065

4th Max

Y

Cert

218

Valid Days

99 Percent Complete

.071

4th Max Cert 28

98 Percent Complete .069

.067 Design Value N

Y D. V. Validity 

### Ozone(44201) Parts per million(007)

Site ID | | | | | | | | | | | | 56-005-0123 56-039-1011 

### REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. Design Value Year: 2001

STREET ADDRESS 2000 1999 

### Wyoming State:

THUNDER BASIN GRASSLAND SITE 35 MI N-NE GILLETTE WY YELLOWSTONE NATIONAL PARK 2001 3 - YearUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 4 of 86 

### Pollutant: Standard Units: .075 Level: Ozone 8-Hour 2008 NAAQS Standard: Annual 4th Maximum Statistic:

1 1 Poc 203 201 Valid Days 95

94 Percent Complete .071

.066 4th Max

Y

Cert 178

211 Valid Days 83

99 Percent Complete .069

.066 4th Max

Y

Cert

209

Valid Days

98 Percent Complete

.065

4th Max

Y

Cert 59

97 Percent Complete .070

.065 Design Value N

Y D. V. Validity 

### Ozone(44201) Parts per million(007)

Site ID | | | | | | | | | | | | 56-005-0123 56-039-1011 

### REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. Design Value Year: 2002

STREET ADDRESS 2001 2000 

### Wyoming State:

THUNDER BASIN GRASSLAND SITE 35 MI N-NE GILLETTE WY YELLOWSTONE NATIONAL PARK 2002 3 - YearUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 5 of 86 

### Pollutant: Standard Units: .075 Level: Ozone 8-Hour 2008 NAAQS Standard: Annual 4th Maximum Statistic:

1 1

1 Poc 206 85
184 Valid Days 96

40
86 Percent Complete .074

.077
.065 4th Max

Y

Cert 203

201 Valid Days 95

94 Percent Complete .071

.066 4th Max

Y

Cert 178

211 Valid Days 83

99 Percent Complete .069

.066 4th Max

Y

Cert 91

13
93 Percent Complete .071

.077
.065 Design Value Y

N

Y D. V. Validity 

### Ozone(44201) Parts per million(007)

Site ID | | | | | | | | | | | | 56-005-0123 56-005-0456
56-039-1011 

### REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. Design Value Year: 2003

STREET ADDRESS 2002 2001 

### Wyoming State:

THUNDER BASIN GRASSLAND SITE 35 MI N-NE GILLETTE WY SOUTH CAMPBELL COUNTYAPPROX 15 MILES SSW OF GILLETTE WY (SEE APPLE BUTTE QUAD MAP) YELLOWSTONE NATIONAL PARK 2003

* 3 - YearUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 6 of 86 

### Pollutant: Standard Units: .075 Level: Ozone 8-Hour 2008 NAAQS Standard: Annual 4th Maximum Statistic:

1 1

1 1 Poc 209 199
0 198 Valid Days 98

93

93 Percent Complete .065

.061
.041 .060 4th Max

Y

Cert 206

85

184 Valid Days 96

40

86 Percent Complete .074

.077

.065 4th Max

Y

Cert 203

201 Valid Days 95

94 Percent Complete .071

.066 4th Max

Y

Cert 96

44

91 Percent Complete .070

.069
.041 .063 Design Value Y

N

N Y D. V. Validity 

### Ozone(44201) Parts per million(007)

Site ID | | | | | | | | | | | | 56-005-0123 56-005-0456
56-035-0098 56-039-1011 

### REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. Design Value Year: 2004

STREET ADDRESS 2003 2002 

### Wyoming State:

THUNDER BASIN GRASSLAND SITE 35 MI N-NE GILLETTE WY SOUTH CAMPBELL COUNTYAPPROX 15 MILES SSW OF GILLETTE WY (SEE APPLE BUTTE QUAD MAP) JONAH APPROX 40 MILES NW OF FARSON, WY YELLOWSTONE NATIONAL PARK 2004

* * 3 - YearUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 7 of 86 

### Pollutant: Standard Units: .075 Level: Ozone 8-Hour 2008 NAAQS Standard: Annual 4th Maximum Statistic:

1 1

1 1 1 1 Poc 212 210

274 250 117 197 Valid Days 99

98
98 92 55 92 Percent Complete .063

.063
.075 .079 .066 .060 4th Max

Y

Cert 209

199
0

198 Valid Days 98

93

93 Percent Complete .065

.061
.041

.060 4th Max

Y

Cert 206

85

184 Valid Days 96

40

86 Percent Complete .074

.077

.065 4th Max

Y

Cert 98

77
35 31 18 90 Percent Complete .067

.067
.058 .079 .066 .061 Design Value Y

N

N N N
Y D. V. Validity 

### Ozone(44201) Parts per million(007)

Site ID | | | | | | | | | | | | 56-005-0123 56-005-0456
56-035-0098 56-035-0099 56-035-0100 56-039-1011 

### REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. Design Value Year: 2005

STREET ADDRESS 2004 2003 

### Wyoming State:

THUNDER BASIN GRASSLAND SITE 35 MI N-NE GILLETTE WY SOUTH CAMPBELL COUNTYAPPROX 15 MILES SSW OF GILLETTE WY (SEE APPLE BUTTE QUAD MAP) JONAH APPROX 40 MILES NW OF FARSON, WY Shell Boulder APPROX 3 MILES WEST OF BOULDER DANIEL SOUTH ~ 4 MILES SO OF DANIEL WYO OFF OF HWY 189 YELLOWSTONE NATIONAL PARK 2005

* * * 3 - YearUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 8 of 86 

### Pollutant: Standard Units: .075 Level: Ozone 8-Hour 2008 NAAQS Standard: Annual 4th Maximum Statistic:

1 1

1 1 1 1 1 Poc 211 207
231 197 238 206 189 Valid Days 99

97
93 92 96 96 88 Percent Complete .072

.065
.069 .072 .074 .067 .069 4th Max Cert 212

210

274 250 117

197 Valid Days 99

98
98 92 55

92 Percent Complete .063

.063
.075 .079 .066

.060 4th Max

Y

Cert 209

199
0

198 Valid Days 98

93

93 Percent Complete .065

.061
.041

.060 4th Max

Y

Cert 98

96
68 64 50 32 91 Percent Complete .066

.063
.061 .075 .070 .067 .063 Design Value Y

Y

N N N
N
Y D. V. Validity 

### Ozone(44201) Parts per million(007)

Site ID | | | | | | | | | | | | 56-005-0123 56-005-0456
56-035-0098 56-035-0099 56-035-0100 56-037-0200 56-039-1011 

### REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. Design Value Year: 2006

STREET ADDRESS 2005 2004 

### Wyoming State:

THUNDER BASIN GRASSLAND SITE 35 MI N-NE GILLETTE WY SOUTH CAMPBELL COUNTYAPPROX 15 MILES SSW OF GILLETTE WY (SEE APPLE BUTTE QUAD MAP) JONAH APPROX 40 MILES NW OF FARSON, WY Shell Boulder APPROX 3 MILES WEST OF BOULDER DANIEL SOUTH ~ 4 MILES SO OF DANIEL WYO OFF OF HWY 189 WAMSUTTER SOUTHEAST PORTION OF SWEETWATER COUNTY YELLOWSTONE NATIONAL PARK 2006

* * 3 - YearUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 9 of 86 

### Pollutant: Standard Units: .075 Level: Ozone 8-Hour 2008 NAAQS Standard: Annual 4th Maximum Statistic:

1 1

1 1 1 1 1 1 1 1 1 Poc 207 210
29 145 205 176 210 199 212 206 211 Valid Days 97

98

14 68 96 82 98 93 99 96 99 Percent Complete .072

.072
.047 .071 .068 .067 .066 .064 .066 .065 .070 4th Max

Y

Cert 211

207

231 197 238 206
189 Valid Days 99

97

93 92 96 96
88 Percent Complete .072

.065

.069 .072 .074 .067
.069 4th Max Cert 212

210

274 250 117

197 Valid Days 99

98

98 92 55

92 Percent Complete .063

.063

.075 .079 .066

.060 4th Max

Y

Cert 98

98

5 23 95 89 83 63 33 92 33 Percent Complete .069

.066
.047 .071 .070 .072 .068 .065 .066 .064 .070 Design Value Y

Y

N N Y N N
N
N Y N D. V. Validity 

### Ozone(44201) Parts per million(007)

Site ID | | | | | | | | | | | | 56-005-0123 56-005-0456
56-007-0099 56-013-0099 56-035-0098 56-035-0099 56-035-0100 56-037-0200 56-037-0898 56-039-1011 56-041-0101 

### REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. Design Value Year: 2007

STREET ADDRESS 2006 2005 

### Wyoming State:

THUNDER BASIN GRASSLAND SITE 35 MI N-NE GILLETTE WY SOUTH CAMPBELL COUNTYAPPROX 15 MILES SSW OF GILLETTE WY (SEE APPLE BUTTE QUAD MAP) Atlantic Rim Met. South Pass WyDot JONAH APPROX 40 MILES NW OF FARSON, WY Shell Boulder APPROX 3 MILES WEST OF BOULDER DANIEL SOUTH ~ 4 MILES SO OF DANIEL WYO OFF OF HWY 189 WAMSUTTER SOUTHEAST PORTION OF SWEETWATER COUNTY OCI #4 SITE RELOCATED YELLOWSTONE NATIONAL PARK Murphy Ridge LOCATED NEAR WYOMING UTAH BORDER 2007

* *

* 3 - YearUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 10 of 86 

### Pollutant: Standard Units: .075 Level: Ozone 8-Hour 2008 NAAQS Standard: Annual 4th Maximum Statistic:

1 1

1 1 1 1 1 1 1 1 1 1 Poc 229 180
128 106 174 67 249 200 244 212 188 209 Valid Days 91

84
60 50 81 26 94 93 96 83 88 98 Percent Complete .074

.064
.069 .062 .066 .082 .101 .074 .064 .072 .065 .064 4th Max Cert 207

210
29 145 205 176 210 199 212 206 211 Valid Days 97

98

14 68 96 82 98 93 99 96 99 Percent Complete .072

.072
.047 .071 .068 .067 .066 .064 .066 .065 .070 4th Max

Y

Cert 211

207

231 197 238 206
189 Valid Days 99

97

93 92 96 96
88 Percent Complete .072

.065

.069 .072 .074 .067
.069 4th Max Cert 95

93

24 17 50 70 90 96 95 59 91 65 Percent Complete .072

.067
.058 .062 .068 .073 .080 .071 .065 .069 .066 .067 Design Value Y

Y

N N N N Y Y
Y
N Y N D. V. Validity 

### Ozone(44201) Parts per million(007)

Site ID | | | | | | | | | | | | 56-005-0123 56-005-0456
56-007-0099 56-011-1013 56-013-0099 56-035-0098 56-035-0099 56-035-0100 56-037-0200 56-037-0898 56-039-1011 56-041-0101 

### REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. Design Value Year: 2008

STREET ADDRESS 2007 2006 

### Wyoming State:

THUNDER BASIN GRASSLAND SITE 35 MI N-NE GILLETTE WY SOUTH CAMPBELL COUNTYAPPROX 15 MILES SSW OF GILLETTE WY (SEE APPLE BUTTE QUAD MAP) Atlantic Rim Met. Devil's Tower National Monument South Pass WyDot JONAH APPROX 40 MILES NW OF FARSON, WY Shell Boulder APPROX 3 MILES WEST OF BOULDER DANIEL SOUTH ~ 4 MILES SO OF DANIEL WYO OFF OF HWY 189 WAMSUTTER SOUTHEAST PORTION OF SWEETWATER COUNTY OCI #4 SITE RELOCATED YELLOWSTONE NATIONAL PARK Murphy Ridge LOCATED NEAR WYOMING UTAH BORDER 2008

* *

* *

* 3 - YearUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 11 of 86 

### Pollutant: Standard Units: .075 Level: Ozone 8-Hour 2008 NAAQS Standard: Annual 4th Maximum Statistic:

1 1

1 1 1 1 1 1 1 1 1 1 Poc 209 198
0 2 163 240 193 213 85 208 177 Valid Days 98

93

1 76 98 90 100 40 97 83 Percent Complete .062

.060
.050 .046 .061 .080 .066 .062 .056 .062 .060 4th Max Cert 229

180
128 106 174 67 249 200

244 212 Valid Days 91

84
60 50 81 26 94 93

96 83 Percent Complete .074

.064
.069 .062 .066 .082 .101 .074

.064 .072 4th Max Cert 207

210
29

145 205 176 210

199 212 Valid Days 97

98

14

68 96 82 98

93 99 Percent Complete .072

.072
.047

.071 .068 .067 .066

.064 .066 4th Max Cert 95

92

24 42 83 37 89 97 13 95 88 Percent Complete .069

.065
.055 .046 .061 .072 .075 .078 .067 .056 .063 .066 Design Value Y

Y

N N N N N Y Y
N
Y
N D. V. Validity 

### Ozone(44201) Parts per million(007)

Site ID | | | | | | | | | | | | 56-005-0123 56-005-0456
56-007-0099 56-007-0100 56-011-1013 56-013-0099 56-035-0098 56-035-0099 56-035-0100 56-035-0101 56-037-0200 56-037-0898 

### REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. Design Value Year: 2009

STREET ADDRESS 2008 2007 

### Wyoming State:

THUNDER BASIN GRASSLAND SITE 35 MI N-NE GILLETTE WY SOUTH CAMPBELL COUNTYAPPROX 15 MILES SSW OF GILLETTE WY (SEE APPLE BUTTE QUAD MAP) Atlantic Rim Met. ATLANTIC RIM SUNDOG LOCATION Devil's Tower National Monument South Pass WyDot JONAH APPROX 40 MILES NW OF FARSON, WY Shell Boulder APPROX 3 MILES WEST OF BOULDER DANIEL SOUTH ~ 4 MILES SO OF DANIEL WYO OFF OF HWY 189 Pinedale Gaseous Monitor on west side of City Park and Pine Creek WAMSUTTER SOUTHEAST PORTION OF SWEETWATER COUNTY OCI #4 SITE RELOCATED 2009

* *

* *

*

* *

* 3 - YearUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 12 of 86 

### Pollutant: Standard Units: .075 Level: Ozone 8-Hour 2008 NAAQS Standard: Annual 4th Maximum Statistic:

1 1 Poc 208 214 Valid Days 97

100 Percent Complete .063

.060 4th Max Cert 188

209 Valid Days 88

98 Percent Complete .065

.064 4th Max Cert 206

211 Valid Days 96

99 Percent Complete .065

.070 4th Max Y

Cert 94

99 Percent Complete .064

.064 Design Value Y

Y D. V. Validity 

### Ozone(44201) Parts per million(007)

Site ID | | | | | | | | | | | | 56-039-1011 56-041-0101 

### REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. Design Value Year: 2009

STREET ADDRESS 2008 2007 

### Wyoming State:

YELLOWSTONE NATIONAL PARK Murphy Ridge LOCATED NEAR WYOMING UTAH BORDER 2009 3 - YearUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 13 of 86 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Statistic: Site-LevelPM2.5 - Local Conditions(88101) Micrograms/cubic meter (LC)(105) PM25 24-hour 2006 / PM25 Annual 2006 Annual Weighted Mean Annual 98th Percentile Level: Level: Design Value Year: 1999

REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 15 35 State Name: Wyoming Site_ID / STREET ADDRESS | | | Cred. Days Comp. Qrtrs Wtd.

Mean 98th Perctil Cert. | | | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Design Value Valid

Ind. | | | Design Value Valid

Ind. 24-Hour Annual 1999 1998 1997
56-005-0877 56-005-0892 56-005-0899 56-009-0819 56-021-0001 56-033-0001 56-033-0002 BLACK THUNDER BTM 26-2 BELLE AYR BA-4,5N,5S TRITON COAL GILLETTE, WYO ANTELOPE SITE 3 STATE OFFICE BLDG 23RD & CENTRAL AVENUE 400 EAST LOUCKS STREET Police Station, 45 WEST 12TH ST., SHERIDAN WY. 49 28 23 23 105 117 119 1

0 0 0 4 4 4 22.7 10.1 8.7 5.4 12.4 25.0 24.5 *
*
*
* 7.0 4.6 4.3 2.8 5.6 8.5 9.5 *
*
*
* N N N N N N N 18 16 26 0

0 1 9.7 36.8 36.8 * 5.0

13.9 13.1 *
*
*
*
*
*
* N N N *
*
*
*
*
*
* 23

10 9 5 11 31 31 N N N N N N N 7.0

4.6 4.3 2.8 5.3 11.2 11.3 N

N N N N N NUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 14 of 86 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Statistic: Site-LevelPM2.5 - Local Conditions(88101) Micrograms/cubic meter (LC)(105) PM25 24-hour 2006 / PM25 Annual 2006 Annual Weighted Mean Annual 98th Percentile Level: Level: Design Value Year: 2000

REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 15 35 State Name: Wyoming Site_ID / STREET ADDRESS | | | Cred. Days Comp. Qrtrs Wtd.

Mean 98th Perctil Cert. | | | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Design Value Valid

Ind. | | | Design Value Valid

Ind. 24-Hour Annual 2000 1999 1998
56-005-0877 56-005-0892 56-005-0899 56-009-0819 56-013-1004 56-021-0001 56-033-0001 56-033-0002 BLACK THUNDER BTM 26-2 BELLE AYR BA-4,5N,5S TRITON COAL GILLETTE, WYO ANTELOPE SITE 3 206 LINCOLN ST STATE OFFICE BLDG 23RD & CENTRAL AVENUE 400 EAST LOUCKS STREET Police Station, 45 WEST 12TH ST., SHERIDAN WY. 108 99 92 83 117 112 121 121 4

3 3 1 4 4 4 4 16.1 23.0 20.9 13.7 35.2 13.2 38.3 34.8 *
*
* 6.1 6.2 5.8 3.3 9.7 5.6 11.9 12.1 *
*
* N N N N N N N N 49 28 23 23
105 117 119 1

0 0 0

4 4 4 22.7 10.1 8.7 5.4
12.4 25.0 24.5 * * * * 7.0 4.6 4.3 2.8
5.6 8.5 9.5 *
*
*
*
* N N N N

N N N 18 16 26 0

0 1 9.7 36.8 36.8 * 5.0

13.9 13.1 *
*
*
*
*
*
*
* N N N 19

17 15 10 35 12 33 32 N N N N N N Y Y 6.5

5.4 5.1 3.1 9.7 5.4 11.4 11.5 N

N N N N N N NUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 15 of 86 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Statistic: Site-LevelPM2.5 - Local Conditions(88101) Micrograms/cubic meter (LC)(105) PM25 24-hour 2006 / PM25 Annual 2006 Annual Weighted Mean Annual 98th Percentile Level: Level: Design Value Year: 2001

REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 15 35 State Name: Wyoming Site_ID / STREET ADDRESS | | | Cred. Days Comp. Qrtrs Wtd.

Mean 98th Perctil Cert. | | | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Design Value Valid

Ind. | | | Design Value Valid

Ind. 24-Hour Annual 2001 2000 1999
56-005-0877 56-005-0892 56-005-0899 56-009-0819 56-013-1003 56-013-1004 56-021-0001 56-033-0001 56-033-0002 56-039-0006 BLACK THUNDER BTM 26-2 BELLE AYR BA-4,5N,5S TRITON COAL GILLETTE, WYO ANTELOPE SITE 3 600 WASHINGTON, Lander, WY 206 LINCOLN ST STATE OFFICE BLDG 23RD & CENTRAL AVENUE 400 EAST LOUCKS STREET Police Station, 45 WEST 12TH ST., SHERIDAN WY. 200 SO WILLOW JACKSON WY TETON CO BUILD 112 74 46 49 16 105 107 119 119 58 4

1 0 0 0 3 3 4 4 2 16.2 11.7 17.7 12.3 30.3 46.4 12.2 35.8 39.6 26.8 *
*
*
*

*

* 6.5 5.2 4.8 3.8 17.1 9.9 5.0 10.1 11.0 8.5 *
*
*
*
*
*

* N N N N Y Y Y Y Y Y 108 99 92 83

117 112 121 121 4

3 3 1

4 4 4 4 16.1 23.0 20.9 13.7
35.2 13.2 38.3 34.8 * * * 6.1 6.2 5.8 3.3
9.7 5.6 11.9 12.1 *
*
*
*

* N N N N

N N N N 49 28 23 23

105 117 119 1

0 0 0

4 4 4 22.7 10.1 8.7 5.4

12.4 25.0 24.5 *
*
*
* 7.0 4.6 4.3 2.8

5.6 8.5 9.5 *
*
*
*
*
*

* N N N N

N N N 18

15 16 10 30 41 13 33 33 27 N N N N N N N Y Y N 6.5

5.4 5.0 3.3 17.1 9.8 5.4 10.2 10.9 8.5 N N N N N N N Y Y NUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 16 of 86 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Statistic: Site-LevelPM2.5 - Local Conditions(88101) Micrograms/cubic meter (LC)(105) PM25 24-hour 2006 / PM25 Annual 2006 Annual Weighted Mean Annual 98th Percentile Level: Level: Design Value Year: 2002

REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 15 35 State Name: Wyoming Site_ID / STREET ADDRESS | | | Cred. Days Comp. Qrtrs Wtd.

Mean 98th Perctil Cert. | | | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Design Value Valid

Ind. | | | Design Value Valid

Ind. 24-Hour Annual 2002 2001 2000
56-005-0877 56-005-0892 56-005-0899 56-009-0819 56-013-1003 56-013-1004 56-021-0001 56-033-0001 56-033-0002 56-039-0006 BLACK THUNDER BTM 26-2 BELLE AYR BA-4,5N,5S TRITON COAL GILLETTE, WYO ANTELOPE SITE 3 600 WASHINGTON, Lander, WY 206 LINCOLN ST STATE OFFICE BLDG 23RD & CENTRAL AVENUE 400 EAST LOUCKS STREET Police Station, 45 WEST 12TH ST., SHERIDAN WY. 200 SO WILLOW JACKSON WY TETON CO BUILD 103 98 83 92 120
108 115 118 65 3

3 2 3 4

4 4 4 1 17.9 13.0 12.6 10.6 33.2
13.8 27.8 27.9 15.1 *
*
*
*

* 6.2 5.0 4.0 3.4 9.6

4.7 8.8 10.1 7.4 *
*
*
*

*

* N N N N Y

Y Y Y Y 112 74 46 49 16 105 107 119 119 58 4

1 0 0 0 3 3 4 4 2 16.2 11.7 17.7 12.3 30.3 46.4 12.2 35.8 39.6 26.8 * * * *

*

* 6.5 5.2 4.8 3.8 17.1 9.9 5.0 10.1 11.0 8.5 *
*
*
*
*
*

* N N N N Y Y Y Y Y Y 108 99 92 83

117 112 121 121 4

3 3 1

4 4 4 4 16.1 23.0 20.9 13.7
35.2 13.2 38.3 34.8 *
*
* 6.1 6.2 5.8 3.3
9.7 5.6 11.9 12.1 *
*
*
*

* N N N N

N N N N 17

16 17 12 32 41 13 34 34 21 N N N N N N N Y Y N 6.2

5.5 4.9 3.5 13.4 9.8 5.1 10.3 11.1 8.0 N N N N N N N Y Y NUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 17 of 86 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Statistic: Site-LevelPM2.5 - Local Conditions(88101) Micrograms/cubic meter (LC)(105) PM25 24-hour 2006 / PM25 Annual 2006 Annual Weighted Mean Annual 98th Percentile Level: Level: Design Value Year: 2003

REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 15 35 State Name: Wyoming Site_ID / STREET ADDRESS | | | Cred. Days Comp. Qrtrs Wtd.

Mean 98th Perctil Cert. | | | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Design Value Valid

Ind. | | | Design Value Valid

Ind. 24-Hour Annual 2003 2002 2001
56-005-0877 56-005-0892 56-005-0899 56-009-0819 56-013-1003 56-013-1004 56-021-0001 56-033-0001 56-033-0002 56-039-0006 BLACK THUNDER BTM 26-2 BELLE AYR BA-4,5N,5S TRITON COAL GILLETTE, WYO ANTELOPE SITE 3 600 WASHINGTON, Lander, WY 206 LINCOLN ST STATE OFFICE BLDG 23RD & CENTRAL AVENUE 400 EAST LOUCKS STREET Police Station, 45 WEST 12TH ST., SHERIDAN WY. 200 SO WILLOW JACKSON WY TETON CO BUILD 105 114 109 113 119

114 113 116 97 4

4 4 4 4

4 4 4 3 20.7 16.3 16.4 15.5 25.7
12.9 25.1 26.3 22.5 * 6.7

5.8 5.9 4.3 8.1
4.9 9.0 10.1 6.7 *

* N N N N Y

Y Y Y Y 103 98 83 92 120
108 115 118 65 3

3 2 3 4

4 4 4 1 17.9 13.0 12.6 10.6 33.2
13.8 27.8 27.9 15.1 * * * *

* 6.2 5.0 4.0 3.4 9.6

4.7 8.8 10.1 7.4 *
*
*
*

*

* N N N N Y

Y Y Y Y 112 74 46 49 16 105 107 119 119 58 4

1 0 0 0 3 3 4 4 2 16.2 11.7 17.7 12.3 30.3 46.4 12.2 35.8 39.6 26.8 *
*
*
*

*

* 6.5 5.2 4.8 3.8 17.1 9.9 5.0 10.1 11.0 8.5 *
*
*
*
*
*

* N N N N Y Y Y Y Y Y 18

14 16 13 30 46 13 30 31 21 N N N N N N N Y Y N 6.5

5.3 4.9 3.8 11.6 9.9 4.9 9.3 10.4 7.6 N N N N N N N Y Y NUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 18 of 86 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Statistic: Site-LevelPM2.5 - Local Conditions(88101) Micrograms/cubic meter (LC)(105) PM25 24-hour 2006 / PM25 Annual 2006 Annual Weighted Mean Annual 98th Percentile Level: Level: Design Value Year: 2004

REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 15 35 State Name: Wyoming Site_ID / STREET ADDRESS | | | Cred. Days Comp. Qrtrs Wtd.

Mean 98th Perctil Cert. | | | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Design Value Valid

Ind. | | | Design Value Valid

Ind. 24-Hour Annual 2004 2003 2002
56-005-0877 56-005-0892 56-005-0899 56-009-0819 56-013-1003 56-021-0001 56-033-0001 56-033-0002 56-039-0006 BLACK THUNDER BTM 26-2 BELLE AYR BA-4,5N,5S TRITON COAL GILLETTE, WYO ANTELOPE SITE 3 600 WASHINGTON, Lander, WY STATE OFFICE BLDG 23RD & CENTRAL AVENUE 400 EAST LOUCKS STREET Police Station, 45 WEST 12TH ST., SHERIDAN WY. 200 SO WILLOW JACKSON WY TETON CO BUILD 114 115 114 108 113 115 110 117 98 4

4 4 4 4 4 3 4 3 16.7 10.9 11.9 8.8 40.2 15.5 31.3 38.9 22.5 *

* 5.7 4.7 5.5 3.3 9.6 5.0 8.4 10.0 6.7 *

* Y Y Y Y Y Y Y Y Y 105 114 109 113 119 114 113 116 97 4

4 4 4 4 4 4 4 3 20.7 16.3 16.4 15.5 25.7 12.9 25.1 26.3 22.5 * 6.7

5.8 5.9 4.3 8.1 4.9 9.0 10.1 6.7 * N

N N N Y Y Y Y Y 103 98 83 92 120 108 115 118 65 3

3 2 3 4 4 4 4 1 17.9 13.0 12.6 10.6 33.2 13.8 27.8 27.9 15.1 *
*
*
*

* 6.2 5.0 4.0 3.4 9.6 4.7 8.8 10.1 7.4 *
*
*
*

* N N N N Y Y Y Y Y 18

13 14 12 33 14 28 31 20 N N N N Y Y N Y N 6.2

5.1 5.1 3.7 9.1 4.9 8.7 10.0 6.9 N N N N Y Y N Y NUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 19 of 86 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Statistic: Site-LevelPM2.5 - Local Conditions(88101) Micrograms/cubic meter (LC)(105) PM25 24-hour 2006 / PM25 Annual 2006 Annual Weighted Mean Annual 98th Percentile Level: Level: Design Value Year: 2005

REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 15 35 State Name: Wyoming Site_ID / STREET ADDRESS | | | Cred. Days Comp. Qrtrs Wtd.

Mean 98th Perctil Cert. | | | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Design Value Valid

Ind. | | | Design Value Valid

Ind. 24-Hour Annual 2005 2004 2003
56-005-0877 56-005-0892 56-005-0899 56-009-0819 56-013-1003 56-021-0001 56-033-0001 56-033-0002 56-033-0003 56-035-0705 56-039-0006 BLACK THUNDER BTM 26-2 BELLE AYR BA-4,5N,5S TRITON COAL GILLETTE, WYO ANTELOPE SITE 3 600 WASHINGTON, Lander, WY STATE OFFICE BLDG 23RD & CENTRAL AVENUE 400 EAST LOUCKS STREET Police Station, 45 WEST 12TH ST., SHERIDAN WY. Highland Park Monitor, 1301 AVON, SHERIDAN WY Pinedale 2.5 - 101 East Hennick 200 SO WILLOW JACKSON WY TETON CO BUILD 103 115 114 111 115 107 58 119 27 48 90 3

4 4 4 4 4 2 4 1 2 2 18.5 9.5 12.2 7.3 30.0 9.2 22.6 32.5 15.8 24.3 29.7 *

*

*
*
* 6.4 4.7 5.1 3.2 7.7 4.1 6.8 9.5 6.0 5.5 6.8 *

*

*
*
* N N N N Y Y Y Y Y N N 114 115 114 108 113 115 110 117

98 4

4 4 4 4 4 3 4

3 16.7 10.9 11.9 8.8 40.2 15.5 31.3 38.9

22.5 *

* 5.7 4.7 5.5 3.3 9.6 5.0 8.4 10.0

6.7 *

*
*
* Y Y Y Y Y Y Y Y

Y 105 114 109 113 119 114 113 116

97 4

4 4 4 4 4 4 4

3 20.7 16.3 16.4 15.5 25.7 12.9 25.1 26.3

22.5 * 6.7

5.8 5.9 4.3 8.1 4.9 9.0 10.1

6.7 *
*
* N N N N Y Y Y Y

Y 19

12 14 11 32 13 26 33 16 24 25 N Y Y Y Y Y N Y N N N 6.3

5.0 5.5 3.6 8.5 4.7 8.1 9.8 6.0 5.5 6.7 N Y Y Y Y Y N Y N N NUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 20 of 86 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Statistic: Site-LevelPM2.5 - Local Conditions(88101) Micrograms/cubic meter (LC)(105) PM25 24-hour 2006 / PM25 Annual 2006 Annual Weighted Mean Annual 98th Percentile Level: Level: Design Value Year: 2006

REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 15 35 State Name: Wyoming Site_ID / STREET ADDRESS | | | Cred. Days Comp. Qrtrs Wtd.

Mean 98th Perctil Cert. | | | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Design Value Valid

Ind. | | | Design Value Valid

Ind. 24-Hour Annual 2006 2005 2004
56-005-0877 56-005-0892 56-005-0899 56-009-0819 56-013-1003 56-021-0001 56-033-0001 56-033-0002 56-033-0003 56-035-0705 56-039-0006 BLACK THUNDER BTM 26-2 BELLE AYR BA-4,5N,5S TRITON COAL GILLETTE, WYO ANTELOPE SITE 3 600 WASHINGTON, Lander, WY STATE OFFICE BLDG 23RD & CENTRAL AVENUE 400 EAST LOUCKS STREET Police Station, 45 WEST 12TH ST., SHERIDAN WY. Highland Park Monitor, 1301 AVON, SHERIDAN WY Pinedale 2.5 - 101 East Hennick 200 SO WILLOW JACKSON WY TETON CO BUILD 97 108 103 106 116 115
119 120 114 114 3

3 4 4 4 4

4 4 4 4 21.8 15.8 11.8 12.3 23.0 13.4
24.4 13.0 16.5 19.6 *
* 6.3 5.5 5.2 3.9 7.7 4.3
9.7 5.7 7.1 6.8 *
*

* N N N N N N

N N N N 103 115 114 111 115 107 58 119 27 48 90 3

4 4 4 4 4 2 4 1 2 2 18.5 9.5 12.2 7.3 30.0 9.2 22.6 32.5 15.8 24.3 29.7 *

*

* * * 6.4 4.7 5.1 3.2 7.7 4.1 6.8 9.5 6.0 5.5 6.8 *

*

*
*
* N N N N Y Y Y Y Y N N 114 115 114 108 113 115 110 117

98 4

4 4 4 4 4 3 4

3 16.7 10.9 11.9 8.8 40.2 15.5 31.3 38.9

22.5 *

* 5.7 4.7 5.5 3.3 9.6 5.0 8.4 10.0

6.7 *

*
*
* Y Y Y Y Y Y Y Y

Y 19

12 12 9 31 13 27 32 14 20 24 N N Y Y Y Y N Y N N N 6.1

5.0 5.2 3.5 8.4 4.5 7.6 9.7 5.9 6.3 6.8 N N Y Y Y Y N Y N N NUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 21 of 86 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Statistic: Site-LevelPM2.5 - Local Conditions(88101) Micrograms/cubic meter (LC)(105) PM25 24-hour 2006 / PM25 Annual 2006 Annual Weighted Mean Annual 98th Percentile Level: Level: Design Value Year: 2007

REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 15 35 State Name: Wyoming Site_ID / STREET ADDRESS | | | Cred. Days Comp. Qrtrs Wtd.

Mean 98th Perctil Cert. | | | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Design Value Valid

Ind. | | | Design Value Valid

Ind. 24-Hour Annual 2007 2006 2005
56-005-0877 56-005-0892 56-005-0899 56-009-0819 56-013-1003 56-021-0001 56-033-0001 56-033-0002 56-033-0003 56-035-0705 56-039-0006 56-039-1006 BLACK THUNDER BTM 26-2 BELLE AYR BA-4,5N,5S TRITON COAL GILLETTE, WYO ANTELOPE SITE 3 600 WASHINGTON, Lander, WY STATE OFFICE BLDG 23RD & CENTRAL AVENUE 400 EAST LOUCKS STREET Police Station, 45 WEST 12TH ST., SHERIDAN WY. Highland Park Monitor, 1301 AVON, SHERIDAN WY Pinedale 2.5 - 101 East Hennick 200 SO WILLOW JACKSON WY TETON CO BUILD Jackson Fire District #1 115 121 109 95 110 113
118 119 105 46 35 4

4 4 3 3 4

4 4 3 1 2 19.0 14.8 13.6 10.4 26.1 9.1
27.4 24.1 12.8 17.9 12.2 *
*

*
*
* 6.7 5.8 4.9 4.0 7.5 4.3
9.4 6.3 5.9 4.8 4.8 *
*

*

*
*
* N N N N N N

N N N N N 97 108 103 106 116 115
119 120 114 114 3

3 4 4 4 4

4 4 4 4 21.8 15.8 11.8 12.3 23.0 13.4
24.4 13.0 16.5 19.6 * * 6.3 5.5 5.2 3.9 7.7 4.3
9.7 5.7 7.1 6.8 *
*

*

* N N N N N N

N N N N 103 115 114 111 115 107 58 119 27 48 90 3

4 4 4 4 4 2 4 1 2 2 18.5 9.5 12.2 7.3 30.0 9.2 22.6 32.5 15.8 24.3 29.7 *

*

*
*
* 6.4 4.7 5.1 3.2 7.7 4.1 6.8 9.5 6.0 5.5 6.8 *

*

*
*
*
* N N N N Y Y Y Y Y N N 20

13 13 10 26 11 23 28 18 18 22 12 N N Y N N Y N Y N N N N 6.5

5.3 5.1 3.7 7.6 4.3 6.8 9.5 6.0 6.2 6.1 4.8 N N Y N N Y N Y N N N NUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 22 of 86 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Statistic: Site-LevelPM2.5 - Local Conditions(88101) Micrograms/cubic meter (LC)(105) PM25 24-hour 2006 / PM25 Annual 2006 Annual Weighted Mean Annual 98th Percentile Level: Level: Design Value Year: 2008

REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 15 35 State Name: Wyoming Site_ID / STREET ADDRESS | | | Cred. Days Comp. Qrtrs Wtd.

Mean 98th Perctil Cert. | | | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Design Value Valid

Ind. | | | Design Value Valid

Ind. 24-Hour Annual 2008 2007 2006
56-005-0877 56-005-0891 56-005-0892 56-005-0899 56-005-1899 56-009-0819 56-013-1003 56-021-0001 56-029-0001 56-033-0002 56-033-0003 56-035-0705 BLACK THUNDER BTM 26-2 BTM-36-2 (BLACK THUNDER MINE) BELLE AYR BA-4,5N,5S TRITON COAL GILLETTE, WYO Buckskin Mine North Site ANTELOPE SITE 3 600 WASHINGTON, Lander, WY STATE OFFICE BLDG 23RD & CENTRAL AVENUE CODY JR HI SCH Police Station, 45 WEST 12TH ST., SHERIDAN WY. Highland Park Monitor, 1301 AVON, SHERIDAN WY Pinedale 2.5 - 101 East Hennick 16 93 117 69 31 109 119 113 64 122 120 83 0

3 4 2 1 4 4 4 2 4 4 2 10.7 17.2 14.5 18.3 11.8 9.2 23.3 10.4 22.3 23.6 14.0 17.3 *
*

*
*

*

* 4.9 5.3 5.8 5.9 5.5 3.6 7.8 4.4 5.7 8.0 5.3 6.5 *
*

*
*

*

* N N N N N N N N N N N N 115

121 109
95 110 113
118 119 105 4

4 4
3 3 4

4 4 3 19.0
14.8 13.6
10.4 26.1 9.1
27.4 24.1 12.8 * *

* 6.7
5.8 4.9
4.0 7.5 4.3
9.4 6.3 5.9 *

*
*
*

*

* N

N N

N N N

N N N 97
108 103
106 116 115
119 120 114 3

3 4

4 4 4

4 4 4 21.8
15.8 11.8
12.3 23.0 13.4
24.4 13.0 16.5 *

* 6.3

5.5 5.2
3.9 7.7 4.3
9.7 5.7 7.1 *
*
*

*

* N

N N

N N N

N N N 17

17 15 15 12 11 24 11 22 25 17 16 N N N N N N N Y N Y Y N 6.0

5.3 5.7 5.3 5.5 3.8 7.7 4.4 5.7 9.1 5.8 6.5 N N N N N N N Y N Y Y NUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 23 of 86 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Statistic: Site-LevelPM2.5 - Local Conditions(88101) Micrograms/cubic meter (LC)(105) PM25 24-hour 2006 / PM25 Annual 2006 Annual Weighted Mean Annual 98th Percentile Level: Level: Design Value Year: 2008

REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 15 35 State Name: Wyoming Site_ID / STREET ADDRESS | | | Cred. Days Comp. Qrtrs Wtd.

Mean 98th Perctil Cert. | | | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Design Value Valid

Ind. | | | Design Value Valid

Ind. 24-Hour Annual 2008 2007 2006
56-037-0007 56-039-0006 56-039-1006 625 AHSAY AVE ROCK SPRINGS WYO 200 SO WILLOW JACKSON WY TETON CO BUILD Jackson Fire District #1 98
61 3

4 18.9
13.7 * 6.8

5.1 *
* N

N 46 35 1

2 17.9 12.2 * * 4.8 4.8 *
*
* N N 114 4 19.6 6.8 *

* N 19

19 13 N N N 6.8

5.8 4.9 N N NUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 24 of 86 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Statistic: Site-LevelPM2.5 - Local Conditions(88101) Micrograms/cubic meter (LC)(105) PM25 24-hour 2006 / PM25 Annual 2006 Annual Weighted Mean Annual 98th Percentile Level: Level: Design Value Year: 2009

REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 15 35 State Name: Wyoming Site_ID / STREET ADDRESS | | | Cred. Days Comp. Qrtrs Wtd.

Mean 98th Perctil Cert. | | | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Design Value Valid

Ind. | | | Design Value Valid

Ind. 24-Hour Annual 2009 2008 2007
56-001-0006 56-005-0877 56-005-0891 56-005-0892 56-005-0899 56-005-1899 56-009-0819 56-013-1003 56-021-0001 56-025-0001 56-029-0001 56-033-0002 406 IVINSON, LARAMIE, WY BLACK THUNDER BTM 26-2 BTM-36-2 (BLACK THUNDER MINE) BELLE AYR BA-4,5N,5S TRITON COAL GILLETTE, WYO Buckskin Mine North Site ANTELOPE SITE 3 600 WASHINGTON, Lander, WY STATE OFFICE BLDG 23RD & CENTRAL AVENUE CITY COUNTY BLDG CENTER AND C STREETS CODY JR HI SCH Police Station, 45 WEST 12TH ST., SHERIDAN WY. 57
102 109
113 102 120 117 70 111 120 2

3 4

4 3 4 4 2 4 4 14.0
9.3 11.6

11.5 7.0 34.9 8.5 8.2 9.5 20.8 *

*

*

* 5.7
4.0 5.1
5.6 3.5 8.3 3.9 4.4 4.3 8.4 *
*
*

*

*

* N

N N

N N N N N N N 16 93 117 69 31 109 119 113
64 122 0

3 4 2 1 4 4 4

2 4 10.7 17.2 14.5 18.3 11.8 9.2 23.3 10.4
22.3 23.6 * *

* *

* 4.9 5.3 5.8 5.9 5.5 3.6 7.8 4.4

5.7 8.0 *
*
*

*
*

*
* N N N N N N N N

N N 115

121 109
95 110 113

118 4

4 4
3 3 4

4 19.0
14.8 13.6
10.4 26.1 9.1

27.4 *
* 6.7
5.8 4.9
4.0 7.5 4.3

9.4 *

*

*
*
*

*
* N

N N

N N N

N 14

15 13 14 16 12 9 28 9 8 16 24 N N N Y N N N N Y N N Y 5.7

5.8 4.6 5.6 5.4 5.6 3.7 7.8 4.2 4.4 5.0 8.6 N N N Y N N N N Y N N YUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date: Aug. 12, 2010

Notes: 1. Warning: Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Annual Values not meeting completeness criteria are marked with an asterisk ('*'). Page 25 of 86 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Statistic: Site-LevelPM2.5 - Local Conditions(88101) Micrograms/cubic meter (LC)(105) PM25 24-hour 2006 / PM25 Annual 2006 Annual Weighted Mean Annual 98th Percentile Level: Level: Design Value Year: 2009

REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 15 35 State Name: Wyoming Site_ID / STREET ADDRESS | | | Cred. Days Comp. Qrtrs Wtd.

Mean 98th Perctil Cert. | | | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Cred. Days Comp. Qrtrs 98th Perctil Wtd.

Mean Cert. |

| | Design Value Valid

Ind. | | | Design Value Valid

Ind. 24-Hour Annual 2009 2008 2007
56-033-0003 56-035-0101 56-035-0705 56-037-0007 56-039-0006 56-039-1006 Highland Park Monitor, 1301 AVON, SHERIDAN WY Pinedale Gaseous Monitor on west side of City Park and Pine Creek Pinedale 2.5 - 101 East Hennick 625 AHSAY AVE ROCK SPRINGS WYO 200 SO WILLOW JACKSON WY TETON CO BUILD Jackson Fire District #1 119 334 96 119
60 4

4 3 4

4 9.7 10.1 16.3 12.1
13.8 * 4.9

4.1 5.5 6.0

4.7 *

* N N N N

N 120
83 98
61 4

2 3

4 14.0
17.3 18.9
13.7 * * 5.3
6.5 6.8

5.1 *
*
*
* N

N N

N 119
105
46 35 4

3

1 2 24.1
12.8
17.9 12.2 *

*
* 6.3
5.9
4.8 4.8 *
*
*
*
* N

N

N N 16

10 15 16 18 13 Y N N N N N 5.5

4.1 6.0 6.4 4.8 4.9 Y N N N N N