# EPA ’s CALPUFF Visibility Modeling Results

# Table of Contents

Table of Contents

................................ ................................ ................................ ................ 2

A. EPA modeling Results: Post

- Consent Decree with Variable Background Ammonia

and Method 6

................................ ................................ ................................ ...................... 6

B. EP A modeling Results: Post

- Consent Decree with Variable Background Ammonia

and Method 8

................................ ................................ ................................ .................... 10

C. EPA modeling Results: Post

- Consent Decree with 1 ppb Background Ammonia and

Method 6

................................ ................................ ................................ ........................... 14

D. EPA modeling Results: Post

- Consent Decree with 1 ppb Background Ammonia and

Method 8

................................ ................................ ................................ ........................... 18

E. EPA modeling Results: EPA Revised Baseline with Variable Background Ammonia

and Method 6

................................ ................................ ................................ .................... 22

F. EPA modeling Results : EPA Revised Baseline with Variable Background Ammonia

and Method 8

................................ ................................ ................................ .................... 26

G. EPA modeling Results: EPA Revised Baseline with 1 ppb Background Ammonia and

Method 6

................................ ................................ ................................ ........................... 30

H. EPA modeling Results: EPA Revised Baseline with 1 ppb Background Ammonia and

Method 8

................................ ................................ ................................ ........................... 34

I. EPA modeling Results: SCR with Variable Background Ammonia and Method 6

..... 38

J. EPA modeling Results: SCR with Variable Background Ammonia and Method 8

..... 42

K. EPA modeling Res ults: SCR with 1 ppb Background Ammonia and Method 6

......... 46

L. EPA modeling Results: SCR with 1 ppb Background Ammonia and Method 8

......... 50

# List of Tables and Figures

Table A

- 1. Unit 1 Post

- Consent Decree Modeling Results (Variable Background

Ammonia and Method 6)

................................ ................................ ........................ 7

Table A

- 2. Unit 2 Post

- Consent Decree Modeling Results (Variable Background

Ammonia and Method 6)

................................ ................................ ........................ 7

Table A

- 3. Unit 3 Post

- Consent Decree Modeling Results (Variable Background

Ammonia and Method 6)

................................ ................................ ........................ 8

Table A

- 4. Unit 4 Post

- Consent Decree Modeling Results (Variable Background

Ammonia and Method 6)

................................ ................................ ........................ 8

Table A

- 5. Facility Post

- Consent Decree Modeling Results (Variable Background

Ammonia and Method 6)

................................ ................................ ........................ 9

Table B

- 1. Unit 1 Post

- Consent Decree Modeling Results (Variable Background

Ammonia and Method 8)

................................ ................................ ...................... 11

Table B

- 2. Unit 2 Post

- Consent Decree Modeling Results (Variable Background

Ammonia and Method 8)

................................ ................................ ...................... 11

Table B

- 3. Unit 3 Post

- Consent Decree Modeling Results (Variable Background

Ammonia and Method 8)

................................ ................................ ...................... 12

Table B

- 4. Unit 4 Post

- Consent Decree Modeling Results (Variable Background

Ammonia and Method 8)

................................ ................................ ...................... 12

Table B

- 5. Facility Post

- Consent Decree Modeling Results (Variable Background

Ammonia and Method 8)

................................ ................................ ...................... 13

Table C

- 1. Unit 1 Post

- Consent Decree Modeling Re sults (1 ppb Background Ammonia

and Method 6)

................................ ................................ ................................ ....... 15

Table C

- 2. Unit 2 Post

- Consent Decree Modeling Results (1 ppb Background Ammonia

an d Method 6)

................................ ................................ ................................ ....... 15

Table C

- 3. Unit 3 Post

- Consent Decree Modeling Results (1 ppb Background Ammonia

and Method 6)

................................ ................................ ................................ ....... 16

Table C

- 4. Unit 4 Post

- Consent Decree Modeling Results (1 ppb Background Ammonia

and Method 6)

................................ ................................ ................................ ....... 16

Table C

- 5. Facility Post

- Consent Decree Modeling Results (1 ppb Background

Ammonia and Method 6)

................................ ................................ ...................... 17

Table D

- 1. Unit 1 Post

- Consent Decree Modeling Results (1 ppb Background Ammonia

and Method 8)

................................ ................................ ................................ ....... 19

Table D

- 2. Unit 2 Post

- Consent Decree Modeling Results (1 ppb Background Ammonia

and Method 8)

................................ ................................ ................................ ....... 19

Table D

- 3. Unit 3 Post

- Consent Decree Modeling Results (1 ppb Background Ammonia

and Method 8)

................................ ................................ ................................ ....... 20

Table D

- 4. Unit 4 Post

- Consent Decree Modeling Results (1 ppb Background Ammonia

and Method 8)

................................ ................................ ................................ ....... 20

Table D

- 5. Facility Post

- Consent Decree Modeling Results (1 ppb Background

Ammonia and Method 8)

................................ ................................ ...................... 21

Table E

- 1. Unit 1 EPA Revised Baseline Modeling Results (Variable Backg round

Ammonia and Method 6)

................................ ................................ ...................... 23

Table E

- 2. Unit 2 EPA Revised Baseline Modeling Results (Variable Background

Ammonia and Method 6)

................................ ................................ ...................... 23

### Table E

- 3. Unit 3 EPA Revised Baseline Modeling Results (Variable Background

Ammonia and Method 6)

................................ ................................ ...................... 24

Table E

- 4. Unit 4 EPA Revised Baseline Modeling Results (Variable Background

Ammonia and Method 6)

................................ ................................ ...................... 24

Table E

- 5. Facility EPA Revised Baseline Modeling Results (Variable Background

Ammonia and Method 6)

................................ ................................ ...................... 25

Table F

- 1. Unit 1 EPA Revised Baseline Modeling Results (Variable Background

Ammonia and Method 8)

................................ ................................ ...................... 27

Table F

- 2. Unit 2 EPA Revised Baseline Modeling Results (Variable Background

Ammonia and Method 8)

................................ ................................ ...................... 27

Table F

- 3. Unit 3 EPA Revised Baseline Modeling Results (Variable Background

Ammonia and Method 8)

................................ ................................ ...................... 28

Table F

- 4. Unit 4 EPA Revised Baseline Modeling Results (Variable Background

Ammonia and Method 8)

................................ ................................ ...................... 28

Table F

- 5. Facility EPA Revised Baseline Modeling Results (Variable Background

Ammonia and Method 8)

................................ ................................ ...................... 29

Table G

- 1. Unit 1 EPA Revised Baseline Modeling Results (1 ppb Background

Ammonia and Method 6)

................................ ................................ ...................... 31

Table G

- 2. Unit 2 EPA Revised Baseline Modeling Results (1 ppb Background

Ammonia and Method 6)

................................ ................................ ...................... 31

Table G

- 3. Unit 3 EPA Revised Baseline Modeling Results (1 ppb Background

Ammonia and Method 6)

................................ ................................ ...................... 32

Table G

- 4. Unit 4 EPA Revised Baseline Modeling Results (1 ppb Background

Ammonia and Method 6)

................................ ................................ ...................... 32

Table G

- 5. Facility EPA Revised Baseline Modeling Results (1 ppb Background

Ammonia and Method 6)

................................ ................................ ...................... 33

Table H

- 1. Unit 1 EPA Revised Baseline Modeling Results (1 ppb Background

Ammonia and Method 8)

................................ ................................ ...................... 35

Table H

- 2. Unit 2 EPA Revised Baseline Modeling Results (1 ppb Background

Ammonia and Method 8)

................................ ................................ ...................... 35

Table H

- 3. Unit 3 EPA Revised Baseline Modeling Results (1 ppb Background

Ammonia and Method 8)

................................ ................................ ...................... 36

Table H

- 4. Unit 4 EPA Revised Baseline Modeling Results (1 ppb Background

Ammonia and Method 8)

................................ ................................ ...................... 36

Table H

- 5. Facility EPA Revised Baseline Modeling Results (1 ppb Background

Ammonia and Method 8)

................................ ................................ ...................... 37

Table I

- 1. Unit 1 SCR Modeling Results (Variable Background A mmonia and Method 6)

................................ ................................ ................................ ............................... 39

Table I

- 2. Unit 2 SCR Modeling Results (Variable Background Ammonia and Method 6)

................................ ................................ ................................ ............................... 39

Table I

- 3. Unit 3 SCR Modeling Results (Variable Background Ammonia and Method 6)

................................ ................................ ................................ ............................... 40

Table I

- 4. Unit 4 SCR Modeling Results (Variable Background Ammonia and Method 6)

................................ ................................ ................................ ............................... 40

Table I

- 5. Facility SCR Modeling Results (Variable Background Ammonia and Method

6)

................................ ................................ ................................ ........................... 41

### Table J

- 1. Unit 1 SCR Modeling Results (Variable Background Ammonia and Method

8)

................................ ................................ ................................ ........................... 43

Table J

- 2. Unit 2 SCR Modeling Results (Variable Background A mmonia and Method

8)

................................ ................................ ................................ ........................... 43

Table J

- 3. Unit 3 SCR Modeling Results (Variable Background Ammonia and Method

8)

................................ ................................ ................................ ........................... 44

Table J

- 4. Unit 4 SCR Modeling Results (Variable Background Ammonia and Method

8)

................................ ................................ ................................ ........................... 44

Table J

- 5. Facility SCR Modeling Results (Variable Background Ammonia and Method

8)

................................ ................................ ................................ ........................... 45

Table K

- 1. Unit 1 SCR Modeling Results (1 ppb Background Ammonia and Method 6)

................................ ................................ ................................ ............................... 47

Table K

- 2. Unit 2 SCR Modeling Results (1 ppb Background Ammonia and Method 6)

................................ ................................ ................................ ............................... 47

Tabl e K

- 3. Unit 3 SCR Modeling Results (1 ppb Background Ammonia and Method 6)

................................ ................................ ................................ ............................... 48

Table K

- 4. Unit 4 SCR Modeling Results (1 ppb Backgro und Ammonia and Method 6)

................................ ................................ ................................ ............................... 48

Table K

- 5. Facility SCR Modeling Results (1 ppb Background Ammonia and Method 6)

................................ ................................ ................................ ............................... 49

Table L

- 1. Unit 1 SCR Modeling Results (1 ppb Background Ammonia and Method 8)

................................ ................................ ................................ ............................... 51

Table L

- 2. Unit 2 SCR Modeling Results (1 ppb Background Ammonia and Method 8)

................................ ................................ ................................ ............................... 51

Table L

- 3. Unit 3 SCR Modeling Results (1 ppb Background Ammonia and Method 8)

................................ ................................ ................................ ............................... 52

Table L

- 4. Unit 4 S CR Modeling Results (1 ppb Background Ammonia and Method 8)

................................ ................................ ................................ ............................... 52

Table L

- 5. Facility SCR Modeling Results (1 ppb Background Ammonia and Method 8)

................................ ................................ ................................ ............................... 53

# A. EPA modeling Results: Post

- Consent Decree with Variable

Background Ammonia and Method 6

### Table A

- 1. Unit 1 Post

- Consent Decree Modeling Results (Variable Background

Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.66 0.17 0.24 0.36 0.66

Bandelier Wilderness 0.25 0.25 0.16 0.22 0.25

Black Canyon of the Gunnison

Wilderness 0.25 0.25 0.12 0.20 0.25

Canyonlands 0.82 0.40 0.34 0.52 0.82

Capitol Reef 0.51 0.10 0.13 0.24 0.51

La Garita Wilderness 0.26 0.37 0.20 0.28 0.37

Grand Canyon 0.16 0.06 0.07 0.09 0.16

Great Sand Dunes National Monument 0.16 0.30 0.21 0.22 0.30

Mesa Verde 1.02 1.06 0.90 0.99 1.06

Pecos Wilderness 0.16 0.21 0.15 0.18 0.21

Petrified Forest 0.10 0.07 0.08 0.08 0.10

San Pedro Parks Wilderness 0.35 0.34 0.31 0.33 0.35

Maroon Bells

- Snowmass Wilderness 0.11 0.10 0.06 0.09 0.11

West Elk Wilderness 0.23 0.23 0.10 0.19 0.23

Weminuche Wilderness 0.36 0.53 0.36 0.41 0.53

Wheeler Peak Wilderness 0.17 0.21 0.15 0.17 0.21

Sum 5.56 4.62 3.56 4.58 6.11



### Table A

- 2. Unit 2 Post

- Consent Decree Modeling Results (Variable Background

Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.66 0.17 0.24 0.36 0.66

Bandelier Wilderness 0.25 0.25 0.16 0.22 0.25

Black Canyon of the Gunnison

Wilderness 0.25 0.25 0.12 0.20 0.25

Canyonlands 0.82 0.39 0.34 0.52 0.82

Capitol Reef 0.51 0.10 0.13 0.24 0.51

La Garita Wilderness 0.26 0.37 0.20 0.28 0.37

Grand Canyon 0.16 0.06 0.07 0.09 0.16

Great Sand Dunes National Monument 0.16 0.30 0.20 0.22 0.30

Mesa Verde 1.02 1.05 0.90 0.99 1.05

Pecos Wilderness 0.16 0.21 0.15 0.17 0.21

Petrified Forest 0.10 0.07 0.08 0.08 0.10

San Pedro Parks Wilderness 0.35 0.34 0.31 0.33 0.35

Maroon Bells

- Snowmass Wilderness 0.11 0.10 0.06 0.09 0.11

West Elk Wilderness 0.23 0.23 0.10 0.18 0.23

Weminuche Wilderness 0.36 0.53 0.36 0.41 0.53

Wheeler Peak Wilderness 0.20 0.21 0.15 0.18 0.21

Sum 5.57 4.60 3.56 4.57 6.08

### Table A

- 3. Unit 3 Post

- Consent Decree Modeling Results (Variable Background

Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.95 0.24 0.38 0.52 0.95

Bandelier Wilderness 0.38 0.39 0.25 0.34 0.39

Black Canyon of the Gunnison

Wilderness 0.36 0.38 0.17 0.30 0.38

Canyonlands 1.24 0.53 0.45 0.74 1.24

Capitol Reef 0.61 0.13 0.19 0.31 0.61

La Garita Wilderness 0.39 0.56 0.30 0.42 0.56

Grand Canyon 0.23 0.08 0.11 0.14 0.23

Great Sand Dunes National Monument 0.25 0.45 0.32 0.34 0.45

Mesa Verde 1.29 1.38 1.18 1.28 1.38

Pecos Wilderness 0.24 0.32 0.25 0.27 0.32

Petrified Forest 0.15 0.11 0.12 0.12 0.15

San Pedro Parks Wilderness 0.50 0.50 0.47 0.49 0.50

Maroon Bells

- Snowmass Wilderness 0.18 0.17 0.08 0.14 0.18

West Elk Wilderness 0.33 0.38 0.15 0.29 0.38

Weminuche Wilderness 0.54 0.74 0.48 0.59 0.74

Wheeler Peak Wilderness 0.27 0.28 0.24 0.26 0.28

Sum 7.91 6.62 5.14 6.56 8.74



### Table A

- 4. Unit 4 Post

- Consent Decree Modeling Results (Variable Background

Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.94 0.23 0.37 0.51 0.94

Bandelier Wilderness 0.37 0.38 0.25 0.33 0.38

Black Canyon of the Gunnison

Wilderness 0.35 0.37 0.17 0.30 0.37

Canyonlands 1.23 0.53 0.44 0.73 1.23

Capitol Reef 0.61 0.13 0.19 0.31 0.61

La Garita Wilderness 0.38 0.55 0.29 0.41 0.55

Grand Canyon 0.23 0.08 0.10 0.14 0.23

Great Sand Dunes National Monument 0.25 0.44 0.31 0.33 0.44

Mesa Verde 1.28 1.36 1.14 1.26 1.36

Pecos Wilderness 0.23 0.32 0.24 0.26 0.32

Petrified Forest 0.15 0.10 0.12 0.12 0.15

San Pedro Parks Wilderness 0.49 0.50 0.47 0.48 0.50

Maroon Bells

- Snowmass Wilderness 0.17 0.16 0.08 0.14 0.17

West Elk Wilderness 0.32 0.37 0.15 0.28 0.37

Weminuche Wilderness 0.54 0.72 0.37 0.54 0.72

Wheeler Peak Wilderness 0.27 0.27 0.24 0.26 0.27

Sum 7.81 6.52 4.92 6.42 8.61

### Table A

- 5. Facility Post

- Consent Decree Modeling Results (Variable Background

Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 1.91 0.66 0.86 1.15 1.91

Bandelier Wilderness 1.02 0.91 0.73 0.88 1.02

Black Canyon of the Gunnison

Wilderness 0.92 1.15 0.53 0.86 1.15

Canyonlands 2.14 1.24 1.17 1.52 2.14

Capitol Reef 1.62 0.45 0.61 0.90 1.62

La Garita Wilderness 0.93 1.46 0.74 1.04 1.46

Grand Canyon 0.67 0.27 0.30 0.41 0.67

Great Sand Dunes National Monument 0.79 1.17 0.92 0.96 1.17

Mesa Verde 2.25 2.61 2.26 2.37 2.61

Pecos Wilderness 0.68 0.95 0.71 0.78 0.95

Petrified Forest 0.46 0.33 0.38 0.39 0.46

San Pedro Parks Wilderness 1.27 1.23 1.07 1.19 1.27

Maroon Bells

- Snowmass Wilderness 0.53 0.51 0.26 0.43 0.53

West Elk Wilderness 0.81 1.03 0.43 0.76 1.03

Weminuche Wilderness 1.27 1.79 1.19 1.42 1.79

Wheeler Peak Wilderness 0.77 0.88 0.66 0.77 0.88

Sum 18.03 16.63 12.80 15.82 20.65

# B. EPA modeling Results: Post

- Consent Decree with Variable

Background Ammonia and Method 8

### Table B

- 1. Unit 1 Post

- Consent Decree Modeling Results (Variable Background

Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.66 0.17 0.25 0.36 0.66

Bandelier Wilderness 0.24 0.26 0.16 0.22 0.26

Black Canyon of the Gunnison

Wilderness 0.25 0.25 0.12 0.21 0.25

Canyonlands 0.89 0.39 0.37 0.55 0.89

Capitol Reef 0.51 0.10 0.12 0.24 0.51

La Garita Wilderness 0.26 0.40 0.21 0.29 0.40

Grand Canyon 0.15 0.06 0.07 0.09 0.15

Great Sand Dunes National Monument 0.15 0.31 0.21 0.22 0.31

Mesa Verde 1.28 1.31 1.16 1.25 1.31

Pecos Wilderness 0.17 0.21 0.16 0.18 0.21

Petrified Forest 0.09 0.06 0.07 0.08 0.09

San Pedro Parks Wilderness 0.41 0.40 0.37 0.39 0.41

Maroon Bells

- Snowmass Wilderness 0.13 0.10 0.07 0.10 0.13

West Elk Wilderness 0.26 0.26 0.11 0.21 0.26

Weminuche Wilderness 0.41 0.65 0.41 0.49 0.65

Wheeler Peak Wilderness 0.20 0.22 0.17 0.20 0.22

Sum 6.05 5.14 4.02 5.07 6.70



### Table B

- 2. Unit 2 Post

- Consent Decree Modeling Results (Variable Background

Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.65 0.17 0.25 0.36 0.65

Bandelier Wilderness 0.25 0.25 0.16 0.22 0.25

Black Canyon of the Gunnison

Wilderness 0.25 0.25 0.12 0.21 0.25

Canyonlands 0.88 0.39 0.37 0.55 0.88

Capitol Reef 0.51 0.10 0.12 0.24 0.51

La Garita Wilderness 0.26 0.39 0.21 0.29 0.39

Grand Canyon 0.15 0.06 0.07 0.09 0.15

Great Sand Dunes National Monument 0.15 0.31 0.21 0.22 0.31

Mesa Verde 1.27 1.30 1.16 1.24 1.30

Pecos Wilderness 0.17 0.21 0.16 0.18 0.21

Petrified Forest 0.09 0.06 0.07 0.08 0.09

San Pedro Parks Wilderness 0.41 0.39 0.37 0.39 0.41

Maroon Bells

- Snowmass Wilderness 0.13 0.10 0.07 0.10 0.13

West Elk Wilderness 0.25 0.26 0.11 0.21 0.26

Weminuche Wilderness 0.41 0.65 0.41 0.49 0.65

Wheeler Peak Wilderness 0.20 0.22 0.17 0.19 0.22

Sum 6.03 5.11 4.01 5.05 6.67

### Table B

- 3. Unit 3 Post

- Consent Decree Modeling Results (Variable Background

Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.97 0.23 0.38 0.53 0.97

Bandelier Wilderness 0.38 0.39 0.27 0.35 0.39

Black Canyon of the Gunnison

Wilderness 0.37 0.40 0.18 0.32 0.40

Canyonlands 1.34 0.53 0.52 0.80 1.34

Capitol Reef 0.61 0.13 0.19 0.31 0.61

La Garita Wilderness 0.38 0.61 0.33 0.44 0.61

Grand Canyon 0.23 0.08 0.10 0.13 0.23

Great Sand Dunes National Monument 0.24 0.46 0.31 0.34 0.46

Mesa Verde 1.59 1.73 1.52 1.61 1.73

Pecos Wilderness 0.25 0.34 0.26 0.28 0.34

Petrified Forest 0.16 0.10 0.11 0.12 0.16

San Pedro Parks Wilderness 0.62 0.57 0.59 0.59 0.62

Maroon Bells

- Snowmass Wilderness 0.20 0.18 0.09 0.16 0.20

West Elk Wilderness 0.36 0.44 0.18 0.33 0.44

Weminuche Wilderness 0.61 0.90 0.60 0.71 0.90

Wheeler Peak Wilderness 0.29 0.32 0.27 0.29 0.32

Sum 8.58 7.41 5.91 7.30 9.70



### Table B

- 4. Unit 4 Post

- Consent Decree Modeling Results (Variable Background

Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.89 0.78 0.40 0.69 0.89

Bandelier Wilderness 0.37 0.39 0.26 0.34 0.39

Black Canyon of the Gunnison

Wilderness 0.36 0.39 0.18 0.31 0.39

Canyonlands 1.32 0.53 0.51 0.79 1.32

Capitol Reef 0.61 0.14 0.19 0.31 0.61

La Garita Wilderness 0.38 0.60 0.32 0.43 0.60

Grand Canyon 0.22 0.08 0.10 0.13 0.22

Great Sand Dunes National Monument 0.23 0.46 0.31 0.33 0.46

Mesa Verde 1.58 1.70 1.51 1.60 1.70

Pecos Wilderness 0.25 0.33 0.25 0.28 0.33

Petrified Forest 0.15 0.10 0.11 0.12 0.15

San Pedro Parks Wilderness 0.61 0.57 0.58 0.58 0.61

Maroon Bells

- Snowmass Wilderness 0.20 0.17 0.09 0.15 0.20

West Elk Wilderness 0.36 0.43 0.18 0.32 0.43

Weminuche Wilderness 0.60 0.89 0.59 0.69 0.89

Wheeler Peak Wilderness 0.28 0.31 0.27 0.29 0.31

Sum 8.40 7.85 5.85 7.37 9.49

### Table B

- 5. Facility Post

- Consent Decree Modeling Results (Variable Background

Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 1.97 0.67 0.87 1.17 1.97

Bandelier Wilderness 1.04 0.93 0.75 0.91 1.04

Black Canyon of the Gunnison

Wilderness 0.96 1.17 0.58 0.90 1.17

Canyonlands 2.34 1.36 1.23 1.64 2.34

Capitol Reef 1.66 0.46 0.59 0.90 1.66

La Garita Wilderness 0.99 1.51 0.81 1.10 1.51

Grand Canyon 0.64 0.25 0.31 0.40 0.64

Great Sand Dunes National Monument 0.73 1.19 0.93 0.95 1.19

Mesa Verde 2.74 3.24 2.88 2.95 3.24

Pecos Wilderness 0.73 1.03 0.74 0.83 1.03

Petrified Forest 0.45 0.32 0.36 0.37 0.45

San Pedro Parks Wilderness 1.54 1.38 1.32 1.41 1.54

Maroon Bells

- Snowmass Wilderness 0.61 0.56 0.30 0.49 0.61

West Elk Wilderness 0.90 1.15 0.52 0.86 1.15

Weminuche Wilderness 1.54 2.22 1.43 1.73 2.22

Wheeler Peak Wilderness 0.84 0.99 0.75 0.86 0.99

Sum 19.68 18.42 14.37 17.49 22.74

# C. EPA modeling Results: Post

- Consent Decree with 1 ppb

Background Ammonia and Method 6

### Table C

- 1. Unit 1 Post

- Consent Decree Modeling Results (1 ppb Background Ammonia

and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.86 0.23 0.32 0.47 0.86

Bandelier Wilderness 0.29 0.27 0.22 0.26 0.29

Black Canyon of the Gunnison

Wilderness 0.30 0.28 0.13 0.23 0.30

Canyonlands 1.07 0.51 0.51 0.70 1.07

Capitol Reef 0.60 0.10 0.15 0.28 0.60

La Garita Wilderness 0.29 0.39 0.23 0.30 0.39

Grand Canyon 0.20 0.07 0.09 0.12 0.20

Great Sand Dunes National Monument 0.19 0.33 0.23 0.25 0.33

Mesa Verde 1.29 1.37 1.30 1.32 1.37

Pecos Wilderness 0.20 0.28 0.19 0.22 0.28

Petrified Forest 0.12 0.10 0.09 0.10 0.12

San Pedro Parks Wilderness 0.43 0.37 0.39 0.40 0.43

Maroon Bells

- Snowmass Wilderness 0.13 0.11 0.07 0.10 0.13

West Elk Wilderness 0.27 0.25 0.12 0.21 0.27

Weminuche Wilderness 0.44 0.59 0.39 0.47 0.59

Wheeler Peak Wilderness 0.21 0.22 0.16 0.20 0.22

Sum 6.87 5.45 4.58 5.63 7.43



### Table C

- 2. Unit 2 Post

- Consent Decree Modeling Results (1 ppb Background Ammonia

and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.85 0.23 0.32 0.47 0.85

Bandelier Wilderness 0.29 0.27 0.22 0.26 0.29

Black Canyon of the Gunnison

Wilderness 0.29 0.27 0.13 0.23 0.29

Canyonlands 1.07 0.51 0.51 0.70 1.07

Capitol Reef 0.59 0.10 0.15 0.28 0.59

La Garita Wilderness 0.29 0.38 0.23 0.30 0.38

Grand Canyon 0.20 0.07 0.09 0.12 0.20

Great Sand Dunes National Monument 0.18 0.33 0.23 0.25 0.33

Mesa Verde 1.29 1.36 1.31 1.32 1.36

Pecos Wilderness 0.19 0.28 0.19 0.22 0.28

Petrified Forest 0.12 0.10 0.09 0.10 0.12

San Pedro Parks Wilderness 0.43 0.37 0.39 0.40 0.43

Maroon Bells

- Snowmass Wilderness 0.13 0.11 0.07 0.10 0.13

West Elk Wilderness 0.27 0.25 0.12 0.21 0.27

Weminuche Wilderness 0.43 0.58 0.39 0.47 0.58

Wheeler Peak Wilderness 0.21 0.22 0.16 0.20 0.22

Sum 6.83 5.43 4.59 5.62 7.40

### Table C

- 3. Unit 3 Post

- Consent Decree Modeling Results (1 ppb Background Ammonia

and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 1.21 0.32 0.50 0.67 1.21

Bandelier Wilderness 0.46 0.42 0.32 0.40 0.46

Black Canyon of the Gunnison

Wilderness 0.42 0.45 0.21 0.36 0.45

Canyonlands 1.54 0.69 0.70 0.98 1.54

Capitol Reef 0.73 0.15 0.24 0.37 0.73

La Garita Wilderness 0.46 0.59 0.35 0.47 0.59

Grand Canyon 0.31 0.10 0.13 0.18 0.31

Great Sand Dunes National Monument 0.29 0.50 0.36 0.38 0.50

Mesa Verde 1.85 1.89 1.71 1.82 1.89

Pecos Wilderness 0.28 0.43 0.31 0.34 0.43

Petrified Forest 0.17 0.16 0.13 0.15 0.17

San Pedro Parks Wilderness 0.67 0.59 0.59 0.62 0.67

Maroon Bells

- Snowmass Wilderness 0.21 0.19 0.09 0.16 0.21

West Elk Wilderness 0.46 0.41 0.19 0.35 0.46

Weminuche Wilderness 0.66 0.90 0.59 0.72 0.90

Wheeler Peak Wilderness 0.35 0.31 0.25 0.30 0.35

Sum 10.06 8.08 6.66 8.27 10.85



### Table C

- 4. Unit 4 Post

- Consent Decree Modeling Results (1 ppb Background Ammonia

and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 1.19 0.31 0.49 0.66 1.19

Bandelier Wilderness 0.45 0.41 0.31 0.39 0.45

Black Canyon of the Gunnison

Wilderness 0.41 0.44 0.20 0.35 0.44

Canyonlands 1.52 0.70 0.69 0.97 1.52

Capitol Reef 0.72 0.15 0.23 0.37 0.72

La Garita Wilderness 0.46 0.58 0.35 0.46 0.58

Grand Canyon 0.30 0.10 0.13 0.18 0.30

Great Sand Dunes National Monument 0.29 0.49 0.35 0.38 0.49

Mesa Verde 1.88 1.94 1.69 1.84 1.94

Pecos Wilderness 0.27 0.41 0.30 0.33 0.41

Petrified Forest 0.17 0.15 0.12 0.15 0.17

San Pedro Parks Wilderness 0.66 0.58 0.58 0.61 0.66

Maroon Bells

- Snowmass Wilderness 0.20 0.19 0.09 0.16 0.20

West Elk Wilderness 0.45 0.41 0.19 0.35 0.45

Weminuche Wilderness 0.65 0.87 0.57 0.70 0.87

Wheeler Peak Wilderness 0.34 0.30 0.25 0.30 0.34

Sum 9.96 8.03 6.53 8.17 10.74

### Table C

- 5. Facility Post

- Consent Decree Modeling Results (1 ppb Background

Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 3.45 0.99 1.53 1.99 3.45

Bandelier Wilderness 1.38 1.29 0.96 1.21 1.38

Black Canyon of the Gunnison

Wilderness 1.34 1.38 0.61 1.11 1.38

Canyonlands 4.21 1.98 2.00 2.73 4.21

Capitol Reef 2.39 0.47 0.74 1.20 2.39

La Garita Wilderness 1.41 1.81 1.09 1.44 1.81

Grand Canyon 0.98 0.34 0.42 0.58 0.98

Great Sand Dunes National Monument 0.90 1.54 1.12 1.19 1.54

Mesa Verde 4.30 4.36 3.99 4.22 4.36

Pecos Wilderness 0.88 1.29 0.92 1.03 1.29

Petrified Forest 0.55 0.48 0.40 0.48 0.55

San Pedro Parks Wilderness 1.92 1.76 1.81 1.83 1.92

Maroon Bells

- Snowmass Wilderness 0.64 0.56 0.34 0.51 0.64

West Elk Wilderness 1.41 1.22 0.61 1.08 1.41

Weminuche Wilderness 1.95 2.45 1.76 2.05 2.45

Wheeler Peak Wilderness 1.05 1.00 0.77 0.94 1.05

Sum 28.78 22.92 19.07 23.59 30.82

# D. EPA modeling Results: Post

- Consent Decree with 1 ppb

Background Ammonia and Method 8

### Table D

- 1. Unit 1 Post

- Consent Decree Modeling Results (1 ppb Background Ammonia

and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.85 0.23 0.33 0.47 0.85

Bandelier Wilderness 0.30 0.28 0.23 0.27 0.30

Black Canyon of the Gunnison

Wilderness 0.29 0.28 0.13 0.23 0.29

Canyonlands 1.16 0.51 0.55 0.74 1.16

Capitol Reef 0.61 0.10 0.14 0.28 0.61

La Garita Wilderness 0.30 0.41 0.25 0.32 0.41

Grand Canyon 0.20 0.06 0.08 0.11 0.20

Great Sand Dunes National Monument 0.17 0.33 0.23 0.24 0.33

Mesa Verde 1.58 1.68 1.74 1.67 1.74

Pecos Wilderness 0.21 0.28 0.20 0.23 0.28

Petrified Forest 0.12 0.09 0.08 0.10 0.12

San Pedro Parks Wilderness 0.50 0.43 0.46 0.47 0.50

Maroon Bells

- Snowmass Wilderness 0.14 0.12 0.08 0.11 0.14

West Elk Wilderness 0.31 0.28 0.13 0.24 0.31

Weminuche Wilderness 0.53 0.73 0.48 0.58 0.73

Wheeler Peak Wilderness 0.23 0.24 0.18 0.22 0.24

Sum 7.52 6.05 5.30 6.29 8.23



### Table D

- 2. Unit 2 Post

- Consent Decree Modeling Results (1 ppb Background Ammonia

and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.85 0.23 0.32 0.47 0.85

Bandelier Wilderness 0.30 0.28 0.24 0.27 0.30

Black Canyon of the Gunnison

Wilderness 0.29 0.28 0.13 0.23 0.29

Canyonlands 1.16 0.51 0.55 0.74 1.16

Capitol Reef 0.60 0.10 0.14 0.28 0.60

La Garita Wilderness 0.30 0.41 0.25 0.32 0.41

Grand Canyon 0.20 0.06 0.08 0.11 0.20

Great Sand Dunes National Monument 0.17 0.32 0.23 0.24 0.32

Mesa Verde 1.58 1.67 1.75 1.67 1.75

Pecos Wilderness 0.21 0.28 0.20 0.23 0.28

Petrified Forest 0.12 0.09 0.08 0.10 0.12

San Pedro Parks Wilderness 0.50 0.43 0.46 0.46 0.50

Maroon Bells

- Snowmass Wilderness 0.14 0.12 0.08 0.11 0.14

West Elk Wilderness 0.31 0.28 0.13 0.24 0.31

Weminuche Wilderness 0.52 0.73 0.49 0.58 0.73

Wheeler Peak Wilderness 0.23 0.24 0.18 0.22 0.24

Sum 7.48 6.02 5.31 6.27 8.21

### Table D

- 3. Unit 3 Post

- Consent Decree Modeling Results (1 ppb Background Ammonia

and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 1.24 0.32 0.51 0.69 1.24

Bandelier Wilderness 0.47 0.43 0.34 0.41 0.47

Black Canyon of the Gunnison

Wilderness 0.44 0.46 0.21 0.37 0.46

Canyonlands 1.72 0.72 0.79 1.08 1.72

Capitol Reef 0.74 0.15 0.23 0.37 0.74

La Garita Wilderness 0.46 0.64 0.37 0.49 0.64

Grand Canyon 0.31 0.09 0.13 0.17 0.31

Great Sand Dunes National Monument 0.28 0.50 0.34 0.37 0.50

Mesa Verde 2.42 2.40 2.27 2.36 2.42

Pecos Wilderness 0.30 0.44 0.34 0.36 0.44

Petrified Forest 0.17 0.15 0.12 0.15 0.17

San Pedro Parks Wilderness 0.79 0.69 0.71 0.73 0.79

Maroon Bells

- Snowmass Wilderness 0.24 0.21 0.10 0.18 0.24

West Elk Wilderness 0.53 0.49 0.22 0.42 0.53

Weminuche Wilderness 0.78 1.08 0.70 0.85 1.08

Wheeler Peak Wilderness 0.38 0.35 0.29 0.34 0.38

Sum 11.25 9.13 7.65 9.34 12.11



### Table D

- 4. Unit 4 Post

- Consent Decree Modeling Results (1 ppb Background Ammonia

and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 1.21 0.31 0.50 0.67 1.21

Bandelier Wilderness 0.46 0.42 0.33 0.41 0.46

Black Canyon of the Gunnison

Wilderness 0.43 0.45 0.21 0.36 0.45

Canyonlands 1.69 0.71 0.78 1.06 1.69

Capitol Reef 0.73 0.15 0.22 0.37 0.73

La Garita Wilderness 0.46 0.63 0.37 0.48 0.63

Grand Canyon 0.30 0.09 0.12 0.17 0.30

Great Sand Dunes National Monument 0.27 0.49 0.34 0.37 0.49

Mesa Verde 2.40 2.35 2.28 2.34 2.40

Pecos Wilderness 0.30 0.42 0.33 0.35 0.42

Petrified Forest 0.17 0.15 0.12 0.15 0.17

San Pedro Parks Wilderness 0.77 0.68 0.69 0.71 0.77

Maroon Bells

- Snowmass Wilderness 0.23 0.20 0.10 0.18 0.23

West Elk Wilderness 0.52 0.50 0.22 0.41 0.52

Weminuche Wilderness 0.75 1.06 0.69 0.83 1.06

Wheeler Peak Wilderness 0.37 0.34 0.28 0.33 0.37

Sum 11.08 8.94 7.58 9.20 11.93

### Table D

- 5. Facility Post

- Consent Decree Modeling Results (1 ppb Background

Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 3.55 0.98 1.56 2.03 3.55

Bandelier Wilderness 1.44 1.32 1.05 1.27 1.44

Black Canyon of the Gunnison

Wilderness 1.38 1.44 0.64 1.15 1.44

Canyonlands 4.69 2.16 2.29 3.05 4.69

Capitol Reef 2.43 0.48 0.73 1.21 2.43

La Garita Wilderness 1.42 1.97 1.16 1.51 1.97

Grand Canyon 0.97 0.30 0.40 0.56 0.97

Great Sand Dunes National Monument 0.88 1.56 1.09 1.18 1.56

Mesa Verde 5.13 5.18 5.07 5.13 5.18

Pecos Wilderness 0.95 1.32 1.06 1.11 1.32

Petrified Forest 0.54 0.47 0.39 0.47 0.54

San Pedro Parks Wilderness 2.23 2.05 2.11 2.13 2.23

Maroon Bells

- Snowmass Wilderness 0.71 0.63 0.35 0.56 0.71

West Elk Wilderness 1.64 1.45 0.70 1.26 1.64

Weminuche Wilderness 2.25 2.94 2.05 2.41 2.94

Wheeler Peak Wilderness 1.16 1.13 0.91 1.07 1.16

Sum 31.36 25.36 21.56 26.09 33.76

# E. EPA modeling Results: EPA Revised Baseline with Variable

Background Ammonia and Method 6

### Table E

- 1. Unit 1 EPA Revised Baseline Modeling Results (Variable Background

Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.64 0.16 0.24 0.35 0.64

Bandelier Wilderness 0.24 0.24 0.15 0.21 0.24

Black Canyon of the Gunnison

Wilderness 0.24 0.24 0.11 0.20 0.24

Canyonlands 0.81 0.38 0.32 0.50 0.81

Capitol Reef 0.48 0.09 0.12 0.23 0.48

La Garita Wilderness 0.25 0.36 0.20 0.27 0.36

Grand Canyon 0.15 0.03 0.07 0.08 0.15

Great Sand Dunes National Monument 0.15 0.29 0.20 0.21 0.29

Mesa Verde 0.99 1.02 0.90 0.97 1.02

Pecos Wilderness 0.12 0.20 0.15 0.16 0.20

Petrified Forest 0.09 0.09 0.07 0.08 0.09

San Pedro Parks Wilderness 0.34 0.31 0.30 0.32 0.34

Maroon Bells

- Snowmass Wilderness 0.11 0.09 0.06 0.09 0.11

West Elk Wilderness 0.22 0.23 0.09 0.18 0.23

Weminuche Wilderness 0.34 0.52 0.40 0.42 0.52

Wheeler Peak Wilderness 0.17 0.17 0.14 0.16 0.17

Sum 5.34 4.42 3.50 4.42 5.89



### Table E

- 2. Unit 2 EPA Revised Baseline Modeling Results (Variable Background

Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.64 0.16 0.24 0.34 0.64

Bandelier Wilderness 0.24 0.24 0.15 0.21 0.24

Black Canyon of the Gunnison

Wilderness 0.24 0.24 0.11 0.20 0.24

Canyonlands 0.80 0.38 0.32 0.50 0.80

Capitol Reef 0.49 0.09 0.12 0.23 0.49

La Garita Wilderness 0.25 0.36 0.21 0.27 0.36

Grand Canyon 0.14 0.05 0.07 0.09 0.14

Great Sand Dunes National Monument 0.15 0.29 0.20 0.21 0.29

Mesa Verde 0.99 1.02 0.90 0.97 1.02

Pecos Wilderness 0.16 0.20 0.15 0.17 0.20

Petrified Forest 0.09 0.06 0.07 0.07 0.09

San Pedro Parks Wilderness 0.34 0.35 0.30 0.33 0.35

Maroon Bells

- Snowmass Wilderness 0.10 0.09 0.06 0.08 0.10

West Elk Wilderness 0.22 0.22 0.09 0.18 0.22

Weminuche Wilderness 0.34 0.52 0.35 0.40 0.52

Wheeler Peak Wilderness 0.17 0.19 0.14 0.17 0.19

Sum 5.35 4.47 3.45 4.42 5.89

### Table E

- 3. Unit 3 EPA Revised Baseline Modeling Results (Variable Background

Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.93 0.23 0.36 0.51 0.93

Bandelier Wilderness 0.37 0.38 0.24 0.33 0.38

Black Canyon of the Gunnison

Wilderness 0.34 0.37 0.17 0.29 0.37

Canyonlands 1.23 0.51 0.44 0.72 1.23

Capitol Reef 0.58 0.13 0.18 0.30 0.58

La Garita Wilderness 0.37 0.55 0.29 0.41 0.55

Grand Canyon 0.22 0.08 0.10 0.13 0.22

Great Sand Dunes National Monument 0.24 0.44 0.31 0.33 0.44

Mesa Verde 1.28 1.36 1.17 1.27 1.36

Pecos Wilderness 0.23 0.31 0.24 0.26 0.31

Petrified Forest 0.16 0.10 0.10 0.12 0.16

San Pedro Parks Wilderness 0.48 0.48 0.46 0.48 0.48

Maroon Bells

- Snowmass Wilderness 0.17 0.16 0.08 0.13 0.17

West Elk Wilderness 0.32 0.38 0.15 0.28 0.38

Weminuche Wilderness 0.52 0.73 0.47 0.57 0.73

Wheeler Peak Wilderness 0.25 0.27 0.23 0.25 0.27

Sum 7.69 6.46 4.98 6.38 8.55



### Table E

- 4. Unit 4 EPA Revised Baseline Modeling Results (Variable Background

Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.92 0.23 0.36 0.50 0.92

Bandelier Wilderness 0.36 0.37 0.24 0.33 0.37

Black Canyon of the Gunnison

Wilderness 0.34 0.39 0.17 0.30 0.39

Canyonlands 1.21 0.52 0.43 0.72 1.21

Capitol Reef 0.59 0.13 0.18 0.30 0.59

La Garita Wilderness 0.37 0.58 0.29 0.41 0.58

Grand Canyon 0.23 0.08 0.10 0.14 0.23

Great Sand Dunes National Monument 0.23 0.43 0.30 0.32 0.43

Mesa Verde 1.44 1.34 1.13 1.30 1.44

Pecos Wilderness 0.23 0.30 0.23 0.25 0.30

Petrified Forest 0.14 0.12 0.10 0.12 0.14

San Pedro Parks Wilderness 0.48 0.48 0.46 0.47 0.48

Maroon Bells

- Snowmass Wilderness 0.17 0.15 0.07 0.13 0.17

West Elk Wilderness 0.31 0.36 0.15 0.27 0.36

Weminuche Wilderness 0.50 0.71 0.45 0.56 0.71

Wheeler Peak Wilderness 0.25 0.26 0.23 0.25 0.26

Sum 7.77 6.45 4.89 6.37 8.59

### Table E

- 5. Facility EPA Revised Baseline Modeling Results (Variable Background

Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 1.91 0.64 0.85 1.13 1.91

Bandelier Wilderness 1.01 0.87 0.70 0.86 1.01

Black Canyon of the Gunnison

Wilderness 0.90 1.12 0.51 0.84 1.12

Canyonlands 2.11 1.22 1.14 1.49 2.11

Capitol Reef 1.62 0.43 0.56 0.87 1.62

La Garita Wilderness 0.92 1.44 0.71 1.03 1.44

Grand Canyon 0.63 0.25 0.29 0.39 0.63

Great Sand Dunes National Monument 0.75 1.14 0.87 0.92 1.14

Mesa Verde 2.21 2.56 2.17 2.31 2.56

Pecos Wilderness 0.66 0.92 0.68 0.75 0.92

Petrified Forest 0.44 0.31 0.33 0.36 0.44

San Pedro Parks Wilderness 1.22 1.18 1.05 1.15 1.22

Maroon Bells

- Snowmass Wilderness 0.52 0.49 0.25 0.42 0.52

West Elk Wilderness 0.79 0.99 0.42 0.73 0.99

Weminuche Wilderness 1.25 1.75 1.17 1.39 1.75

Wheeler Peak Wilderness 0.74 0.85 0.63 0.74 0.85

Sum 17.67 16.15 12.33 15.38 20.20

# F. EPA modeling Results: EPA Revised Baseline with Variable

Background Ammonia and Method 8

### Table F

- 1. Unit 1 EPA Revised Baseline Modeling Results (Variable Background

Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.64 0.16 0.24 0.35 0.64

Bandelier Wilderness 0.24 0.25 0.28 0.25 0.28

Black Canyon of the Gunnison

Wilderness 0.24 0.25 0.12 0.20 0.25

Canyonlands 0.87 0.38 0.35 0.53 0.87

Capitol Reef 0.50 0.08 0.11 0.23 0.50

La Garita Wilderness 0.25 0.39 0.21 0.28 0.39

Grand Canyon 0.14 0.05 0.06 0.08 0.14

Great Sand Dunes National Monument 0.14 0.30 0.20 0.22 0.30

Mesa Verde 1.24 1.30 1.16 1.23 1.30

Pecos Wilderness 0.17 0.21 0.16 0.18 0.21

Petrified Forest 0.09 0.12 0.06 0.09 0.12

San Pedro Parks Wilderness 0.41 0.35 0.37 0.37 0.41

Maroon Bells

- Snowmass Wilderness 0.13 0.10 0.07 0.10 0.13

West Elk Wilderness 0.25 0.25 0.13 0.21 0.25

Weminuche Wilderness 0.39 0.64 0.40 0.48 0.64

Wheeler Peak Wilderness 0.19 0.19 0.16 0.18 0.19

Sum 5.88 5.02 4.07 4.99 6.60



### Table F

- 2. Unit 2 EPA Revised Baseline Modeling Results (Variable Background

Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.63 0.16 0.24 0.34 0.63

Bandelier Wilderness 0.23 0.28 0.16 0.23 0.28

Black Canyon of the Gunnison

Wilderness 0.23 0.24 0.12 0.20 0.24

Canyonlands 0.87 0.38 0.35 0.53 0.87

Capitol Reef 0.49 0.08 0.11 0.23 0.49

La Garita Wilderness 0.25 0.39 0.22 0.28 0.39

Grand Canyon 0.16 0.05 0.06 0.09 0.16

Great Sand Dunes National Monument 0.14 0.30 0.20 0.22 0.30

Mesa Verde 1.03 1.29 1.16 1.16 1.29

Pecos Wilderness 0.17 0.21 0.16 0.18 0.21

Petrified Forest 0.09 0.06 0.07 0.07 0.09

San Pedro Parks Wilderness 0.40 0.38 0.37 0.38 0.40

Maroon Bells

- Snowmass Wilderness 0.13 0.10 0.07 0.10 0.13

West Elk Wilderness 0.25 0.25 0.11 0.20 0.25

Weminuche Wilderness 0.39 0.64 0.36 0.46 0.64

Wheeler Peak Wilderness 0.19 0.20 0.16 0.19 0.20

Sum 5.66 5.02 3.90 4.86 6.58

### Table F

- 3. Unit 3 EPA Revised Baseline Modeling Results (Variable Background

Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.95 0.23 0.37 0.52 0.95

Bandelier Wilderness 0.37 0.39 0.26 0.34 0.39

Black Canyon of the Gunnison

Wilderness 0.34 0.39 0.18 0.30 0.39

Canyonlands 1.33 0.51 0.50 0.78 1.33

Capitol Reef 0.60 0.13 0.18 0.30 0.60

La Garita Wilderness 0.38 0.59 0.32 0.43 0.59

Grand Canyon 0.21 0.08 0.10 0.13 0.21

Great Sand Dunes National Monument 0.22 0.45 0.31 0.33 0.45

Mesa Verde 1.58 1.71 1.51 1.60 1.71

Pecos Wilderness 0.25 0.33 0.25 0.27 0.33

Petrified Forest 0.17 0.10 0.10 0.12 0.17

San Pedro Parks Wilderness 0.60 0.56 0.59 0.58 0.60

Maroon Bells

- Snowmass Wilderness 0.20 0.17 0.09 0.15 0.20

West Elk Wilderness 0.35 0.42 0.18 0.32 0.42

Weminuche Wilderness 0.58 0.89 0.59 0.69 0.89

Wheeler Peak Wilderness 0.28 0.27 0.27 0.27 0.28

Sum 8.40 7.21 5.77 7.12 9.49



### Table F

- 4. Unit 4 EPA Revised Baseline Modeling Results (Variable Background

Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.94 0.22 0.36 0.51 0.94

Bandelier Wilderness 0.37 0.38 0.25 0.33 0.38

Black Canyon of the Gunnison

Wilderness 0.34 0.44 0.18 0.32 0.44

Canyonlands 1.31 0.52 0.49 0.77 1.31

Capitol Reef 0.60 0.12 0.18 0.30 0.60

La Garita Wilderness 0.37 0.76 0.31 0.48 0.76

Grand Canyon 0.23 0.07 0.10 0.13 0.23

Great Sand Dunes National Monument 0.22 0.44 0.32 0.33 0.44

Mesa Verde 1.57 1.69 1.47 1.58 1.69

Pecos Wilderness 0.24 0.32 0.24 0.27 0.32

Petrified Forest 0.14 0.16 0.09 0.13 0.16

San Pedro Parks Wilderness 0.59 0.56 0.58 0.57 0.59

Maroon Bells

- Snowmass Wilderness 0.20 0.17 0.09 0.15 0.20

West Elk Wilderness 0.35 0.42 0.17 0.31 0.42

Weminuche Wilderness 0.57 0.88 0.57 0.67 0.88

Wheeler Peak Wilderness 0.27 0.30 0.27 0.28 0.30

Sum 8.30 7.44 5.67 7.14 9.64

### Table F

- 5. Facility EPA Revised Baseline Modeling Results (Variable Background

Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 1.98 0.66 0.85 1.16 1.98

Bandelier Wilderness 1.01 0.89 0.74 0.88 1.01

Black Canyon of the Gunnison

Wilderness 0.91 1.13 0.56 0.87 1.13

Canyonlands 2.34 1.33 1.18 1.62 2.34

Capitol Reef 1.63 0.41 0.56 0.87 1.63

La Garita Wilderness 0.98 1.48 0.81 1.09 1.48

Grand Canyon 0.60 0.24 0.29 0.38 0.60

Great Sand Dunes National Monument 0.70 1.16 0.91 0.92 1.16

Mesa Verde 2.74 3.22 2.85 2.93 3.22

Pecos Wilderness 0.72 0.99 0.72 0.81 0.99

Petrified Forest 0.43 0.30 0.31 0.35 0.43

San Pedro Parks Wilderness 1.54 1.36 1.29 1.40 1.54

Maroon Bells

- Snowmass Wilderness 0.60 0.55 0.29 0.48 0.60

West Elk Wilderness 0.87 1.14 0.51 0.84 1.14

Weminuche Wilderness 1.50 2.20 1.40 1.70 2.20

Wheeler Peak Wilderness 0.81 0.96 0.73 0.83 0.96

Sum 19.33 18.01 14.00 17.11 22.40

# G. EPA modeling Results: EPA Revised Baseline with 1 ppb

Background Ammonia and Method 6

### Table G

- 1. Unit 1 EPA Revised Baseline Modeling Results (1 ppb Background

Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.83 0.22 0.31 0.46 0.83

Bandelier Wilderness 0.28 0.26 0.21 0.25 0.28

Black Canyon of the Gunnison

Wilderness 0.28 0.27 0.13 0.23 0.28

Canyonlands 1.05 0.50 0.50 0.68 1.05

Capitol Reef 0.58 0.09 0.13 0.27 0.58

La Garita Wilderness 0.28 0.38 0.22 0.29 0.38

Grand Canyon 0.19 0.06 0.08 0.11 0.19

Great Sand Dunes National Monument 0.18 0.32 0.22 0.24 0.32

Mesa Verde 1.44 1.33 1.62 1.46 1.62

Pecos Wilderness 0.19 0.28 0.19 0.22 0.28

Petrified Forest 0.12 0.09 0.08 0.10 0.12

San Pedro Parks Wilderness 0.42 0.36 0.43 0.40 0.43

Maroon Bells

- Snowmass Wilderness 0.17 0.10 0.06 0.11 0.17

West Elk Wilderness 0.26 0.25 0.12 0.21 0.26

Weminuche Wilderness 0.43 0.58 0.37 0.46 0.58

Wheeler Peak Wilderness 0.20 0.21 0.16 0.19 0.21

Sum 6.90 5.30 4.81 5.67 7.59



### Table G

- 2. Unit 2 EPA Revised Baseline Modeling Results (1 ppb Background

Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.83 0.22 0.31 0.45 0.83

Bandelier Wilderness 0.28 0.26 0.21 0.25 0.28

Black Canyon of the Gunnison

Wilderness 0.28 0.27 0.13 0.23 0.28

Canyonlands 1.04 0.50 0.32 0.62 1.04

Capitol Reef 0.58 0.09 0.14 0.27 0.58

La Garita Wilderness 0.28 0.53 0.22 0.34 0.53

Grand Canyon 0.23 0.06 0.08 0.12 0.23

Great Sand Dunes National Monument 0.18 0.37 0.20 0.25 0.37

Mesa Verde 1.43 1.32 1.62 1.46 1.62

Pecos Wilderness 0.19 0.27 0.20 0.22 0.27

Petrified Forest 0.12 0.05 0.08 0.08 0.12

San Pedro Parks Wilderness 0.42 0.35 0.43 0.40 0.43

Maroon Bells

- Snowmass Wilderness 0.12 0.10 0.07 0.10 0.12

West Elk Wilderness 0.26 0.24 0.12 0.21 0.26

Weminuche Wilderness 0.42 0.58 0.37 0.46 0.58

Wheeler Peak Wilderness 0.20 0.21 0.16 0.19 0.21

Sum 6.86 5.43 4.65 5.65 7.75

### Table G

- 3. Unit 3 EPA Revised Baseline Modeling Results (1 ppb Background

Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 1.18 0.31 0.49 0.66 1.18

Bandelier Wilderness 0.43 0.41 0.31 0.38 0.43

Black Canyon of the Gunnison

Wilderness 0.41 0.44 0.20 0.35 0.44

Canyonlands 1.51 0.67 0.68 0.96 1.51

Capitol Reef 0.71 0.14 0.22 0.36 0.71

La Garita Wilderness 0.45 0.73 0.35 0.51 0.73

Grand Canyon 0.30 0.09 0.12 0.17 0.30

Great Sand Dunes National Monument 0.28 0.55 0.35 0.39 0.55

Mesa Verde 2.27 1.87 1.90 2.01 2.27

Pecos Wilderness 0.28 0.41 0.30 0.33 0.41

Petrified Forest 0.17 0.15 0.12 0.15 0.17

San Pedro Parks Wilderness 0.66 0.66 0.58 0.64 0.66

Maroon Bells

- Snowmass Wilderness 0.17 0.19 0.09 0.15 0.19

West Elk Wilderness 0.52 0.40 0.19 0.37 0.52

Weminuche Wilderness 0.64 0.88 0.55 0.69 0.88

Wheeler Peak Wilderness 0.29 0.30 0.25 0.28 0.30

Sum 10.25 8.21 6.68 8.38 11.24



### Table G

- 4. Unit 4 EPA Revised Baseline Modeling Results (1 ppb Background

Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 1.16 0.30 0.39 0.62 1.16

Bandelier Wilderness 0.42 0.40 0.30 0.37 0.42

Black Canyon of the Gunnison

Wilderness 0.40 0.43 0.20 0.34 0.43

Canyonlands 1.35 0.68 0.68 0.90 1.35

Capitol Reef 0.68 0.14 0.21 0.34 0.68

La Garita Wilderness 0.44 0.57 0.34 0.45 0.57

Grand Canyon 0.29 0.08 0.17 0.18 0.29

Great Sand Dunes National Monument 0.28 0.54 0.34 0.39 0.54

Mesa Verde 1.86 1.92 1.87 1.88 1.92

Pecos Wilderness 0.26 0.40 0.29 0.31 0.40

Petrified Forest 0.16 0.14 0.11 0.14 0.16

San Pedro Parks Wilderness 0.65 0.61 0.67 0.64 0.67

Maroon Bells

- Snowmass Wilderness 0.20 0.18 0.09 0.16 0.20

West Elk Wilderness 0.44 0.40 0.19 0.34 0.44

Weminuche Wilderness 0.63 0.86 0.65 0.71 0.86

Wheeler Peak Wilderness 0.33 0.29 0.25 0.29 0.33

Sum 9.52 7.94 6.74 8.07 10.39

### Table G

- 5. Facility EPA Revised Baseline Modeling Results (1 ppb Background

Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 3.32 0.96 1.49 1.92 3.32

Bandelier Wilderness 1.34 1.26 0.93 1.18 1.34

Black Canyon of the Gunnison

Wilderness 1.31 1.35 0.60 1.09 1.35

Canyonlands 4.15 1.95 1.97 2.69 4.15

Capitol Reef 2.33 0.45 0.70 1.16 2.33

La Garita Wilderness 1.37 1.77 1.07 1.41 1.77

Grand Canyon 0.94 0.30 0.39 0.54 0.94

Great Sand Dunes National Monument 0.86 1.49 1.09 1.15 1.49

Mesa Verde 4.26 4.33 3.95 4.18 4.33

Pecos Wilderness 0.86 1.23 0.90 1.00 1.23

Petrified Forest 0.54 0.47 0.38 0.46 0.54

San Pedro Parks Wilderness 1.89 1.69 1.77 1.78 1.89

Maroon Bells

- Snowmass Wilderness 0.62 0.55 0.31 0.49 0.62

West Elk Wilderness 1.37 1.20 0.59 1.05 1.37

Weminuche Wilderness 1.86 2.42 1.70 1.99 2.42

Wheeler Peak Wilderness 1.02 0.97 0.76 0.92 1.02

Sum 28.04 22.39 18.60 23.01 30.11

# H. EPA modeling Results: EPA Revised Baseline with 1 ppb

Background Ammonia and Method 8

### Table H

- 1. Unit 1 EPA Revised Baseline Modeling Results (1 ppb Background

Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

ma ximum 2001 2002 2003

Arches 0.83 0.22 0.32 0.46 0.83

Bandelier Wilderness 0.29 0.27 0.23 0.26 0.29

Black Canyon of the Gunnison

Wilderness 0.29 0.27 0.22 0.26 0.29

Canyonlands 1.34 0.78 0.54 0.88 1.34

Capitol Reef 0.59 0.09 0.13 0.27 0.59

La Garita Wilderness 0.29 0.41 0.24 0.31 0.41

Grand Canyon 0.19 0.05 0.08 0.11 0.19

Great Sand Dunes National Monument 0.16 0.32 0.23 0.24 0.32

Mesa Verde 1.53 1.64 1.87 1.68 1.87

Pecos Wilderness 0.21 0.28 0.20 0.23 0.28

Petrified Forest 0.14 0.13 0.09 0.12 0.14

San Pedro Parks Wilderness 0.49 0.42 0.46 0.45 0.49

Maroon Bells

- Snowmass Wilderness 0.24 0.11 0.07 0.14 0.24

West Elk Wilderness 0.31 0.28 0.13 0.24 0.31

Weminuche Wilderness 0.51 0.72 0.47 0.57 0.72

Wheeler Peak Wilderness 0.22 0.23 0.18 0.21 0.23

Sum 7.61 6.21 5.44 6.42 8.53



### Table H

- 2. Unit 2 EPA Revised Baseline Modeling Results (1 ppb Background

Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.82 0.22 0.32 0.45 0.82

Bandelier Wilderness 0.29 0.34 0.37 0.33 0.37

Black Canyon of the Gunnison

Wilderness 0.29 0.31 0.13 0.24 0.31

Canyonlands 1.13 0.50 0.54 0.72 1.13

Capitol Reef 0.59 0.09 0.13 0.27 0.59

La Garita Wilderness 0.30 0.55 0.24 0.36 0.55

Grand Canyon 0.23 0.05 0.08 0.12 0.23

Great Sand Dunes National Monument 0.18 0.46 0.22 0.29 0.46

Mesa Verde 1.52 1.63 1.87 1.67 1.87

Pecos Wilderness 0.20 0.28 0.20 0.23 0.28

Petrified Forest 0.12 0.09 0.08 0.10 0.12

San Pedro Parks Wilderness 0.49 0.41 0.46 0.45 0.49

Maroon Bells

- Snowmass Wilderness 0.14 0.11 0.09 0.11 0.14

West Elk Wilderness 0.31 0.28 0.13 0.24 0.31

Weminuche Wilderness 0.51 0.72 0.47 0.56 0.72

Wheeler Peak Wilderness 0.22 0.23 0.18 0.21 0.23

Sum 7.33 6.26 5.48 6.36 8.61

### Table H

- 3. Unit 3 EPA Revised Baseline Modeling Results (1 ppb Background

Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 1.21 0.31 0.49 0.67 1.21

Bandelier Wilderness 0.46 0.53 0.33 0.44 0.53

Black Canyon of the Gunnison

Wilderness 0.43 0.45 0.21 0.36 0.45

Canyonlands 1.69 0.71 0.77 1.06 1.69

Capitol Reef 0.72 0.14 0.21 0.36 0.72

La Garita Wilderness 0.45 0.86 0.36 0.56 0.86

Grand Canyon 0.29 0.08 0.12 0.16 0.29

Great Sand Dunes National Monument 0.27 0.66 0.34 0.42 0.66

Mesa Verde 2.41 2.34 2.25 2.33 2.41

Pecos Wilderness 0.30 0.42 0.33 0.35 0.42

Petrified Forest 0.17 0.15 0.12 0.14 0.17

San Pedro Parks Wilderness 0.77 0.66 0.70 0.71 0.77

Maroon Bells

- Snowmass Wilderness 0.22 0.20 0.10 0.17 0.22

West Elk Wilderness 0.56 0.48 0.22 0.42 0.56

Weminuche Wilderness 0.65 1.07 0.69 0.80 1.07

Wheeler Peak Wilderness 0.35 0.34 0.28 0.32 0.35

Sum 10.94 9.40 7.50 9.28 12.37



### Table H

- 4. Unit 4 EPA Revised Baseline Modeling Results (1 ppb Background

Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 1.19 0.59 0.48 0.75 1.19

Bandelier Wilderness 0.45 0.41 0.32 0.40 0.45

Black Canyon of the Gunnison

Wilderness 0.44 0.44 0.23 0.37 0.44

Canyonlands 2.07 0.69 0.76 1.17 2.07

Capitol Reef 0.72 0.14 0.20 0.35 0.72

La Garita Wilderness 0.44 0.61 0.36 0.47 0.61

Grand Canyon 0.29 0.09 0.17 0.19 0.29

Great Sand Dunes National Monument 0.26 0.65 0.33 0.41 0.65

Mesa Verde 2.40 2.29 2.26 2.32 2.40

Pecos Wilderness 0.32 0.41 0.32 0.35 0.41

Petrified Forest 0.17 0.19 0.11 0.16 0.19

San Pedro Parks Wilderness 0.76 0.65 0.74 0.71 0.76

Maroon Bells

- Snowmass Wilderness 0.23 0.20 0.10 0.17 0.23

West Elk Wilderness 0.51 0.46 0.21 0.40 0.51

Weminuche Wilderness 0.72 1.05 0.71 0.83 1.05

Wheeler Peak Wilderness 0.36 0.32 0.28 0.32 0.36

Sum 11.31 9.19 7.59 9.36 12.31

### Table H

- 5. Facility EPA Revised Baseline Modeling Results (1 ppb Background

Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 3.50 0.96 1.52 1.99 3.50

Bandelier Wilderness 1.39 1.29 1.02 1.23 1.39

Black Canyon of the Gunnison

Wilderness 1.36 1.41 0.63 1.13 1.41

Canyonlands 4.64 2.12 2.26 3.01 4.64

Capitol Reef 2.38 0.46 0.65 1.17 2.38

La Garita Wilderness 1.39 1.93 1.14 1.48 1.93

Grand Canyon 0.93 0.26 0.38 0.52 0.93

Great Sand Dunes National Monument 0.85 1.53 1.08 1.15 1.53

Mesa Verde 5.10 5.15 5.01 5.09 5.15

Pecos Wilderness 0.93 1.27 1.03 1.08 1.27

Petrified Forest 0.52 0.46 0.38 0.45 0.52

San Pedro Parks Wilderness 2.20 1.97 2.08 2.08 2.20

Maroon Bells

- Snowmass Wilderness 0.70 0.60 0.34 0.55 0.70

West Elk Wilderness 1.59 1.42 0.68 1.23 1.59

Weminuche Wilderness 2.15 2.92 2.01 2.36 2.92

Wheeler Peak Wilderness 1.12 1.09 0.90 1.04 1.12

Sum 30.75 24.85 21.09 25.56 33.18

# I. EPA modeling Results: SCR with Variable Background

Ammonia and Method 6

### Table I

- 1. Unit 1 SCR Modeling Results (Variable Background Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.22 0.11 0.08 0.14 0.22

Bandelier Wilderness 0.09 0.10 0.08 0.09 0.10

Black Canyon of the Gunnison

Wilderness 0.08 0.08 0.05 0.07 0.08

Canyonlands 0.27 0.16 0.14 0.19 0.27

Capitol Reef 0.17 0.06 0.08 0.10 0.17

La Garita Wilderness 0.09 0.12 0.07 0.09 0.12

Grand Canyon 0.06 0.03 0.04 0.05 0.06

Great Sand Dunes National Monument 0.07 0.10 0.07 0.08 0.10

Mesa Verde 0.38 0.39 0.43 0.40 0.43

Pecos Wilderness 0.07 0.09 0.06 0.07 0.09

Petrified Forest 0.04 0.03 0.05 0.04 0.05

San Pedro Parks Wilderness 0.12 0.13 0.11 0.12 0.13

Maroon Bells

- Snowmass Wilderness 0.05 0.04 0.02 0.04 0.05

West Elk Wilderness 0.08 0.07 0.04 0.06 0.08

Weminuche Wilderness 0.15 0.16 0.14 0.15 0.16

Wheeler Peak Wilderness 0.08 0.08 0.06 0.07 0.08

Sum 2.03 1.74 1.51 1.76 2.20



### Table I

- 2. Unit 2 SCR Modeling Results (Variable Background Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.22 0.11 0.08 0.14 0.22

Bandelier Wilderness 0.09 0.10 0.08 0.09 0.10

Black Canyon of the Gunnison

Wilderness 0.08 0.08 0.05 0.07 0.08

Canyonlands 0.27 0.16 0.14 0.19 0.27

Capitol Reef 0.17 0.06 0.08 0.10 0.17

La Garita Wilderness 0.09 0.12 0.07 0.09 0.12

Grand Canyon 0.06 0.03 0.04 0.05 0.06

Great Sand Dunes National Monument 0.07 0.10 0.07 0.08 0.10

Mesa Verde 0.38 0.39 0.43 0.40 0.43

Pecos Wilderness 0.07 0.09 0.06 0.07 0.09

Petrified Forest 0.04 0.03 0.05 0.04 0.05

San Pedro Parks Wilderness 0.12 0.13 0.11 0.12 0.13

Maroon Bells

- Snowmass Wilderness 0.05 0.04 0.02 0.04 0.05

West Elk Wilderness 0.08 0.07 0.04 0.06 0.08

Weminuche Wilderness 0.14 0.16 0.14 0.15 0.16

Wheeler Peak Wilderness 0.08 0.08 0.06 0.07 0.08

Sum 2.02 1.73 1.50 1.75 2.19

### Table I

- 3. Unit 3 SCR Modeling Results (Variable Background Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.32 0.16 0.12 0.20 0.32

Bandelier Wilderness 0.15 0.15 0.12 0.14 0.15

Black Canyon of the Gunnison

Wilderness 0.12 0.13 0.08 0.11 0.13

Canyonlands 0.40 0.22 0.20 0.27 0.40

Capitol Reef 0.22 0.08 0.10 0.13 0.22

La Garita Wilderness 0.14 0.17 0.11 0.14 0.17

Grand Canyon 0.09 0.05 0.06 0.07 0.09

Great Sand Dunes National Monument 0.11 0.15 0.11 0.12 0.15

Mesa Verde 0.53 0.56 0.61 0.57 0.61

Pecos Wilderness 0.11 0.13 0.09 0.11 0.13

Petrified Forest 0.06 0.04 0.07 0.06 0.07

San Pedro Parks Wilderness 0.19 0.21 0.17 0.19 0.21

Maroon Bells

- Snowmass Wilderness 0.08 0.06 0.04 0.06 0.08

West Elk Wilderness 0.13 0.11 0.06 0.10 0.13

Weminuche Wilderness 0.21 0.24 0.18 0.21 0.24

Wheeler Peak Wilderness 0.13 0.13 0.08 0.11 0.13

Sum 2.98 2.58 2.18 2.58 3.22



### Table I

- 4. Unit 4 SCR Modeling Results (Variable Background Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.32 0.16 0.12 0.20 0.32

Bandelier Wilderness 0.14 0.15 0.12 0.14 0.15

Black Canyon of the Gunnison

Wilderness 0.12 0.13 0.08 0.11 0.13

Canyonlands 0.39 0.22 0.19 0.27 0.39

Capitol Reef 0.22 0.08 0.10 0.13 0.22

La Garita Wilderness 0.13 0.17 0.10 0.13 0.17

Grand Canyon 0.09 0.04 0.06 0.07 0.09

Great Sand Dunes National Monument 0.11 0.15 0.10 0.12 0.15

Mesa Verde 0.53 0.56 0.60 0.56 0.60

Pecos Wilderness 0.10 0.13 0.08 0.11 0.13

Petrified Forest 0.06 0.04 0.07 0.06 0.07

San Pedro Parks Wilderness 0.18 0.20 0.16 0.18 0.20

Maroon Bells

- Snowmass Wilderness 0.08 0.06 0.04 0.06 0.08

West Elk Wilderness 0.13 0.11 0.07 0.10 0.13

Weminuche Wilderness 0.21 0.23 0.18 0.21 0.23

Wheeler Peak Wilderness 0.12 0.13 0.08 0.11 0.13

Sum 2.93 2.54 2.15 2.54 3.17

### Table I

- 5. Facility SCR Modeling Results (Variable Background Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 1.01 0.53 0.40 0.65 1.01

Bandelier Wilderness 0.46 0.46 0.39 0.44 0.46

Black Canyon of the Gunnison

Wilderness 0.40 0.39 0.27 0.35 0.40

Canyonlands 1.22 0.70 0.62 0.85 1.22

Capitol Reef 0.76 0.27 0.32 0.45 0.76

La Garita Wilderness 0.44 0.56 0.34 0.45 0.56

Grand Canyon 0.31 0.14 0.21 0.22 0.31

Great Sand Dunes National Monument 0.36 0.49 0.34 0.39 0.49

Mesa Verde 1.56 1.59 1.54 1.56 1.59

Pecos Wilderness 0.34 0.42 0.27 0.34 0.42

Petrified Forest 0.21 0.14 0.23 0.19 0.23

San Pedro Parks Wilderness 0.59 0.60 0.57 0.59 0.60

Maroon Bells

- Snowmass Wilderness 0.26 0.18 0.12 0.19 0.26

West Elk Wilderness 0.42 0.34 0.19 0.32 0.42

Weminuche Wilderness 0.70 0.75 0.59 0.68 0.75

Wheeler Peak Wilderness 0.40 0.42 0.26 0.36 0.42

Sum 9.44 7.96 6.64 8.02 9.90

# J. EPA modeling Results: SCR with Variable Background Ammonia

and Method 8

### Table J

- 1. Unit 1 SCR Modeling Results (Variable Background Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.21 0.10 0.08 0.13 0.21

Bandelier Wilderness 0.09 0.09 0.08 0.08 0.09

Black Canyon of the Gunnison

Wilderness 0.08 0.08 0.05 0.07 0.08

Canyonlands 0.28 0.13 0.14 0.18 0.28

Capitol Reef 0.17 0.05 0.07 0.10 0.17

La Garita Wilderness 0.09 0.11 0.07 0.09 0.11

Grand Canyon 0.06 0.03 0.04 0.04 0.06

Great Sand Dunes National Monument 0.06 0.09 0.07 0.07 0.09

Mesa Verde 0.45 0.43 0.49 0.46 0.49

Pecos Wilderness 0.07 0.09 0.06 0.07 0.09

Petrified Forest 0.04 0.03 0.04 0.04 0.04

San Pedro Parks Wilderness 0.14 0.14 0.13 0.14 0.14

Maroon Bells

- Snowmass Wilderness 0.05 0.04 0.02 0.04 0.05

West Elk Wilderness 0.09 0.07 0.05 0.07 0.09

Weminuche Wilderness 0.16 0.19 0.15 0.16 0.19

Wheeler Peak Wilderness 0.08 0.09 0.06 0.08 0.09

Sum 2.12 1.75 1.58 1.82 2.27



### Table J

- 2. Unit 2 SCR Modeling Results (Variable Background Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.21 0.10 0.08 0.13 0.21

Bandelier Wilderness 0.13 0.09 0.08 0.10 0.13

Black Canyon of the Gunnison

Wilderness 0.08 0.08 0.05 0.07 0.08

Canyonlands 0.28 0.13 0.14 0.18 0.28

Capitol Reef 0.16 0.05 0.07 0.10 0.16

La Garita Wilderness 0.09 0.11 0.07 0.09 0.11

Grand Canyon 0.06 0.03 0.04 0.04 0.06

Great Sand Dunes National Monument 0.06 0.12 0.07 0.08 0.12

Mesa Verde 0.45 0.43 0.48 0.45 0.48

Pecos Wilderness 0.07 0.09 0.06 0.07 0.09

Petrified Forest 0.04 0.03 0.04 0.04 0.04

San Pedro Parks Wilderness 0.17 0.14 0.13 0.15 0.17

Maroon Bells

- Snowmass Wilderness 0.05 0.04 0.02 0.04 0.05

West Elk Wilderness 0.09 0.07 0.05 0.07 0.09

Weminuche Wilderness 0.16 0.19 0.15 0.16 0.19

Wheeler Peak Wilderness 0.08 0.09 0.06 0.08 0.09

Sum 2.19 1.78 1.58 3.36 2.35

### Table J

- 3. Unit 3 SCR Modeling Results (Variable Background Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.31 0.14 0.12 0.19 0.31

Bandelier Wilderness 0.14 0.14 0.11 0.13 0.14

Black Canyon of the Gunnison

Wilderness 0.11 0.12 0.08 0.10 0.12

Canyonlands 0.40 0.19 0.19 0.26 0.40

Capitol Reef 0.22 0.07 0.09 0.13 0.22

La Garita Wilderness 0.13 0.17 0.10 0.14 0.17

Grand Canyon 0.09 0.04 0.06 0.06 0.09

Great Sand Dunes National Monument 0.10 0.14 0.10 0.11 0.14

Mesa Verde 0.62 0.65 0.67 0.65 0.67

Pecos Wilderness 0.11 0.13 0.09 0.11 0.13

Petrified Forest 0.06 0.04 0.06 0.06 0.06

San Pedro Parks Wilderness 0.21 0.23 0.19 0.21 0.23

Maroon Bells

- Snowmass Wilderness 0.08 0.06 0.04 0.06 0.08

West Elk Wilderness 0.14 0.12 0.07 0.11 0.14

Weminuche Wilderness 0.23 0.28 0.20 0.24 0.28

Wheeler Peak Wilderness 0.13 0.13 0.09 0.12 0.13

Sum 3.08 2.66 2.26 2.66 3.32



### Table J

- 4. Unit 4 SCR Modeling Results (Variable Background Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.31 0.14 0.12 0.19 0.31

Bandelier Wilderness 0.14 0.13 0.11 0.13 0.14

Black Canyon of the Gunnison

Wilderness 0.11 0.12 0.07 0.10 0.12

Canyonlands 0.39 0.19 0.19 0.26 0.39

Capitol Reef 0.22 0.07 0.09 0.13 0.22

La Garita Wilderness 0.13 0.17 0.10 0.13 0.17

Grand Canyon 0.09 0.04 0.06 0.06 0.09

Great Sand Dunes National Monument 0.10 0.14 0.10 0.11 0.14

Mesa Verde 0.62 0.67 0.66 0.65 0.67

Pecos Wilderness 0.10 0.13 0.09 0.11 0.13

Petrified Forest 0.06 0.04 0.06 0.06 0.06

San Pedro Parks Wilderness 0.20 0.22 0.19 0.21 0.22

Maroon Bells

- Snowmass Wilderness 0.08 0.06 0.04 0.06 0.08

West Elk Wilderness 0.14 0.12 0.07 0.11 0.14

Weminuche Wilderness 0.23 0.27 0.20 0.23 0.27

Wheeler Peak Wilderness 0.13 0.13 0.09 0.12 0.13

Sum 3.03 2.65 2.22 2.63 3.27

### Table J

- 5. Facility SCR Modeling Results (Variable Background Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.97 0.47 0.39 0.61 0.97

Bandelier Wilderness 0.45 0.43 0.36 0.41 0.45

Black Canyon of the Gunnison

Wilderness 0.38 0.39 0.25 0.34 0.39

Canyonlands 1.20 0.62 0.62 0.81 1.20

Capitol Reef 0.74 0.24 0.29 0.42 0.74

La Garita Wilderness 0.44 0.55 0.34 0.44 0.55

Grand Canyon 0.29 0.13 0.19 0.20 0.29

Great Sand Dunes National Monument 0.32 0.45 0.32 0.36 0.45

Mesa Verde 1.74 1.77 1.69 1.73 1.77

Pecos Wilderness 0.34 0.43 0.28 0.35 0.43

Petrified Forest 0.20 0.14 0.21 0.18 0.21

San Pedro Parks Wilderness 0.66 0.66 0.61 0.64 0.66

Maroon Bells

- Snowmass Wilderness 0.27 0.18 0.12 0.19 0.27

West Elk Wilderness 0.44 0.37 0.21 0.34 0.44

Weminuche Wilderness 0.76 0.82 0.69 0.76 0.82

Wheeler Peak Wilderness 0.41 0.43 0.30 0.38 0.43

Sum 9.60 8.08 6.86 8.18 10.07

# K. EPA modeling Results: SCR with 1 ppb Background Ammonia

and Method 6

### Table K

- 1. Unit 1 SCR Modeling Results (1 ppb Background Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.25 0.11 0.09 0.15 0.25

Bandelier Wilderness 0.09 0.10 0.08 0.09 0.10

Black Canyon of the Gunnison

Wilderness 0.09 0.09 0.06 0.08 0.09

Canyonlands 0.31 0.16 0.14 0.21 0.31

Capitol Reef 0.17 0.06 0.08 0.10 0.17

La Garita Wilderness 0.10 0.12 0.07 0.10 0.12

Grand Canyon 0.07 0.03 0.04 0.05 0.07

Great Sand Dunes National Monument 0.07 0.11 0.08 0.09 0.11

Mesa Verde 0.40 0.42 0.44 0.42 0.44

Pecos Wilderness 0.08 0.09 0.06 0.08 0.09

Petrified Forest 0.04 0.03 0.05 0.04 0.05

San Pedro Parks Wilderness 0.13 0.13 0.13 0.13 0.13

Maroon Bells

- Snowmass Wilderness 0.05 0.04 0.02 0.04 0.05

West Elk Wilderness 0.09 0.07 0.05 0.07 0.09

Weminuche Wilderness 0.15 0.16 0.14 0.15 0.16

Wheeler Peak Wilderness 0.08 0.09 0.06 0.08 0.09

Sum 2.17 1.80 1.61 1.86 2.33



### Table K

- 2. Unit 2 SCR Modeling Results (1 ppb Background Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.25 0.11 0.09 0.15 0.25

Bandelier Wilderness 0.09 0.10 0.08 0.09 0.10

Black Canyon of the Gunnison

Wilderness 0.09 0.09 0.06 0.08 0.09

Canyonlands 0.28 0.16 0.14 0.20 0.28

Capitol Reef 0.17 0.06 0.08 0.10 0.17

La Garita Wilderness 0.10 0.12 0.07 0.10 0.12

Grand Canyon 0.07 0.03 0.04 0.05 0.07

Great Sand Dunes National Monument 0.07 0.11 0.08 0.09 0.11

Mesa Verde 0.40 0.41 0.44 0.42 0.44

Pecos Wilderness 0.08 0.09 0.06 0.08 0.09

Petrified Forest 0.04 0.03 0.05 0.04 0.05

San Pedro Parks Wilderness 0.13 0.13 0.13 0.13 0.13

Maroon Bells

- Snowmass Wilderness 0.05 0.04 0.02 0.04 0.05

West Elk Wilderness 0.09 0.07 0.05 0.07 0.09

Weminuche Wilderness 0.15 0.16 0.14 0.15 0.16

Wheeler Peak Wilderness 0.08 0.09 0.06 0.08 0.09

Sum 2.13 1.80 1.60 1.84 2.29

### Table K

- 3. Unit 3 SCR Modeling Results (1 ppb Background Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.35 0.16 0.14 0.22 0.35

Bandelier Wilderness 0.15 0.16 0.13 0.15 0.16

Black Canyon of the Gunnison

Wilderness 0.13 0.13 0.08 0.11 0.13

Canyonlands 0.45 0.25 0.22 0.30 0.45

Capitol Reef 0.24 0.08 0.10 0.14 0.24

La Garita Wilderness 0.15 0.17 0.11 0.14 0.17

Grand Canyon 0.10 0.05 0.07 0.07 0.10

Great Sand Dunes National Monument 0.11 0.16 0.11 0.13 0.16

Mesa Verde 0.61 0.60 0.63 0.61 0.63

Pecos Wilderness 0.11 0.15 0.10 0.12 0.15

Petrified Forest 0.06 0.05 0.07 0.06 0.07

San Pedro Parks Wilderness 0.20 0.21 0.20 0.20 0.21

Maroon Bells

- Snowmass Wilderness 0.08 0.06 0.04 0.06 0.08

West Elk Wilderness 0.14 0.11 0.07 0.11 0.14

Weminuche Wilderness 0.23 0.25 0.19 0.22 0.25

Wheeler Peak Wilderness 0.13 0.13 0.09 0.12 0.13

Sum 3.22 2.73 2.35 2.77 3.42



### Table K

- 4. Unit 4 SCR Modeling Results (1 ppb Background Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.35 0.16 0.14 0.22 0.35

Bandelier Wilderness 0.15 0.15 0.13 0.15 0.15

Black Canyon of the Gunnison

Wilderness 0.12 0.13 0.08 0.11 0.13

Canyonlands 0.44 0.24 0.22 0.30 0.44

Capitol Reef 0.23 0.08 0.10 0.14 0.23

La Garita Wilderness 0.15 0.17 0.11 0.14 0.17

Grand Canyon 0.10 0.05 0.06 0.07 0.10

Great Sand Dunes National Monument 0.11 0.16 0.11 0.13 0.16

Mesa Verde 0.60 0.62 0.63 0.62 0.63

Pecos Wilderness 0.11 0.15 0.09 0.12 0.15

Petrified Forest 0.06 0.05 0.07 0.06 0.07

San Pedro Parks Wilderness 0.19 0.21 0.19 0.20 0.21

Maroon Bells

- Snowmass Wilderness 0.08 0.06 0.04 0.06 0.08

West Elk Wilderness 0.13 0.11 0.07 0.10 0.13

Weminuche Wilderness 0.22 0.25 0.19 0.22 0.25

Wheeler Peak Wilderness 0.13 0.13 0.09 0.11 0.13

Sum 3.18 2.70 2.31 2.73 3.38

### Table K

- 5. Facility SCR Modeling Results (1 ppb Background Ammonia and Method 6)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 1.14 0.53 0.47 0.71 1.14

Bandelier Wilderness 0.49 0.50 0.40 0.46 0.50

Black Canyon of the Gunnison

Wilderness 0.43 0.41 0.27 0.37 0.43

Canyonlands 1.44 0.79 0.71 0.98 1.44

Capitol Reef 0.83 0.27 0.32 0.47 0.83

La Garita Wilderness 0.50 0.56 0.36 0.47 0.56

Grand Canyon 0.34 0.15 0.21 0.24 0.34

Great Sand Dunes National Monument 0.36 0.53 0.37 0.42 0.53

Mesa Verde 1.84 1.83 2.02 1.90 2.02

Pecos Wilderness 0.38 0.48 0.31 0.39 0.48

Petrified Forest 0.21 0.16 0.23 0.20 0.23

San Pedro Parks Wilderness 0.62 0.67 0.63 0.64 0.67

Maroon Bells

- Snowmass Wilderness 0.26 0.18 0.13 0.19 0.26

West Elk Wilderness 0.44 0.34 0.22 0.33 0.44

Weminuche Wilderness 0.74 0.75 0.66 0.72 0.75

Wheeler Peak Wilderness 0.41 0.43 0.29 0.38 0.43

Sum 10.43 8.58 7.58 8.86 11.05

# L. EPA modeling Results: SCR with 1 ppb Background Ammonia

and Method 8

### Table L

- 1. Unit 1 SCR Modeling Results (1 ppb Background Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.24 0.10 0.09 0.14 0.24

Bandelier Wilderness 0.09 0.10 0.09 0.09 0.10

Black Canyon of the Gunnison

Wilderness 0.09 0.09 0.06 0.08 0.09

Canyonlands 0.38 0.15 0.15 0.23 0.38

Capitol Reef 0.17 0.05 0.08 0.10 0.17

La Garita Wilderness 0.10 0.11 0.07 0.10 0.11

Grand Canyon 0.07 0.03 0.04 0.04 0.07

Great Sand Dunes National Monument 0.06 0.10 0.07 0.08 0.10

Mesa Verde 0.47 0.46 0.52 0.48 0.52

Pecos Wilderness 0.08 0.09 0.07 0.08 0.09

Petrified Forest 0.04 0.03 0.04 0.04 0.04

San Pedro Parks Wilderness 0.14 0.15 0.13 0.14 0.15

Maroon Bells

- Snowmass Wilderness 0.06 0.04 0.02 0.04 0.06

West Elk Wilderness 0.09 0.07 0.05 0.07 0.09

Weminuche Wilderness 0.17 0.19 0.15 0.17 0.19

Wheeler Peak Wilderness 0.08 0.09 0.06 0.08 0.09

Sum 2.32 1.85 1.70 1.95 2.49



### Table L

- 2. Unit 2 SCR Modeling Results (1 ppb Background Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.24 0.10 0.09 0.14 0.24

Bandelier Wilderness 0.09 0.09 0.09 0.09 0.09

Black Canyon of the Gunnison

Wilderness 0.09 0.08 0.06 0.08 0.09

Canyonlands 0.38 0.15 0.15 0.23 0.38

Capitol Reef 0.17 0.05 0.08 0.10 0.17

La Garita Wilderness 0.10 0.11 0.07 0.09 0.11

Grand Canyon 0.07 0.03 0.04 0.04 0.07

Great Sand Dunes National Monument 0.06 0.10 0.07 0.08 0.10

Mesa Verde 0.47 0.46 0.51 0.48 0.51

Pecos Wilderness 0.08 0.09 0.07 0.08 0.09

Petrified Forest 0.04 0.03 0.04 0.04 0.04

San Pedro Parks Wilderness 0.14 0.15 0.13 0.14 0.15

Maroon Bells

- Snowmass Wilderness 0.06 0.04 0.02 0.04 0.06

West Elk Wilderness 0.09 0.07 0.05 0.07 0.09

Weminuche Wilderness 0.17 0.19 0.15 0.17 0.19

Wheeler Peak Wilderness 0.08 0.09 0.06 0.08 0.09

Sum 2.31 1.84 1.69 1.95 2.47

### Table L

- 3. Unit 3 SCR Modeling Results (1 ppb Background Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.35 0.14 0.14 0.21 0.35

Bandelier Wilderness 0.15 0.15 0.13 0.14 0.15

Black Canyon of the Gunnison

Wilderness 0.12 0.13 0.08 0.11 0.13

Canyonlands 0.47 0.20 0.22 0.30 0.47

Capitol Reef 0.24 0.07 0.09 0.13 0.24

La Garita Wilderness 0.15 0.18 0.11 0.15 0.18

Grand Canyon 0.10 0.04 0.06 0.06 0.10

Great Sand Dunes National Monument 0.10 0.15 0.11 0.12 0.15

Mesa Verde 0.72 0.71 0.75 0.73 0.75

Pecos Wilderness 0.12 0.15 0.10 0.12 0.15

Petrified Forest 0.06 0.05 0.06 0.06 0.06

San Pedro Parks Wilderness 0.22 0.24 0.21 0.22 0.24

Maroon Bells

- Snowmass Wilderness 0.09 0.06 0.04 0.06 0.09

West Elk Wilderness 0.15 0.13 0.07 0.11 0.15

Weminuche Wilderness 0.25 0.29 0.23 0.25 0.29

Wheeler Peak Wilderness 0.13 0.14 0.10 0.12 0.14

Sum 3.39 2.81 2.49 2.90 3.62



### Table L

- 4. Unit 4 SCR Modeling Results (1 ppb Background Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 0.34 0.14 0.14 0.21 0.34

Bandelier Wilderness 0.15 0.14 0.13 0.14 0.15

Black Canyon of the Gunnison

Wilderness 0.12 0.13 0.07 0.11 0.13

Canyonlands 0.47 0.20 0.21 0.29 0.47

Capitol Reef 0.24 0.07 0.09 0.13 0.24

La Garita Wilderness 0.15 0.17 0.11 0.14 0.17

Grand Canyon 0.10 0.04 0.06 0.06 0.10

Great Sand Dunes National Monument 0.10 0.15 0.10 0.12 0.15

Mesa Verde 0.71 0.70 0.74 0.72 0.74

Pecos Wilderness 0.12 0.14 0.10 0.12 0.14

Petrified Forest 0.06 0.07 0.06 0.06 0.07

San Pedro Parks Wilderness 0.21 0.23 0.20 0.22 0.23

Maroon Bells

- Snowmass Wilderness 0.09 0.06 0.04 0.06 0.09

West Elk Wilderness 0.15 0.13 0.07 0.11 0.15

Weminuche Wilderness 0.24 0.28 0.22 0.25 0.28

Wheeler Peak Wilderness 0.13 0.14 0.09 0.12 0.14

Sum 3.35 2.79 2.44 2.86 3.56

### Table L

- 5. Facility SCR Modeling Results (1 ppb Background Ammonia and Method 8)

Class I Area 98th Percentile for Each

Year 3 year

average 3 year

maximum 2001 2002 2003

Arches 1.12 0.47 0.46 0.68 1.12

Bandelier Wilderness 0.48 0.47 0.41 0.45 0.48

Black Canyon of the Gunnison

Wilderness 0.42 0.41 0.25 0.36 0.42

Canyonlands 1.53 0.67 0.74 0.98 1.53

Capitol Reef 0.82 0.25 0.32 0.46 0.82

La Garita Wilderness 0.50 0.57 0.36 0.47 0.57

Grand Canyon 0.33 0.13 0.19 0.22 0.33

Great Sand Dunes National Monument 0.32 0.49 0.34 0.38 0.49

Mesa Verde 2.12 2.03 2.27 2.14 2.27

Pecos Wilderness 0.39 0.47 0.32 0.40 0.47

Petrified Forest 0.20 0.15 0.21 0.19 0.21

San Pedro Parks Wilderness 0.69 0.74 0.66 0.70 0.74

Maroon Bells

- Snowmass Wilderness 0.28 0.18 0.13 0.20 0.28

West Elk Wilderness 0.45 0.39 0.23 0.36 0.45

Weminuche Wilderness 0.81 0.87 0.72 0.80 0.87

Wheeler Peak Wilderness 0.41 0.44 0.31 0.39 0.44

Sum 10.86 8.74 7.92 9.17 11.48