APPENDIX E 

2018 Visibility Projects at VISTAS and Nearby Class I Areas for the 

Worst 20 Percent Days using EPA Default Approach and 

Comparison with 2018 Uniform Rate of Progress 
 E-1 

2018 VISIBILITY PROJECTS AT VISTAS AND NEARBY CLASS I AREAS 

FOR THE WORST 20 PERCENT DAYS USING EPA DEFAULT APPROACH 

AND COMPARISON WITH 2018 UNIFORM RATE OF PROGRESS 

VISTAS Class I Areas

• Figure E-1: Sipsey Wilderness Area (SIPS), Alabama 

• Figure E-2: Chassahowitzka Wildlife Refuge (CHAS), Florida 

• Figure E-3: Everglades National Park (EVER), Florida 

• Figure E-4: St. Marks Wildlife Refuge (SAMA), Florida 

• Figure E-5: Cohutta Wilderness Area (COHU), Georgia 

• Figure E-6: Okefenokee Wildlife Refuge (OKEF), Georgia 

• Figure E-7: Mammoth Cave National Park (MACA), Kentucky 

• Figure E-8: Linville Gorge Wilderness Area (LIGO), North Carolina 

• Figure E-9: Shining Rock Wilderness Area (SHRO), North Carolina 

• Figure E-10: Swanquarter Wildlife Refuge (SWAN), North Carolina 

• Figure E-11: Cape Romain Wildlife Refuge (ROMA), South Carolina 

• Figure E-12: Great Smoky Mountains National Park (GRSM), Tennessee-North Carolina 

• Figure E-13: James River Face Wilderness Area (JARI), Virginia 

• Figure E-14: Shenandoah National Park (SHEN), Virginia 

• Figure E-15: Dolly Sods Wilderness Area (DOSO), West Virginia 

Nearby Class I Areas

• Figure E-16: Breton Island Wildlife Refuge (BRET), Louisiana 

• Figure E-17: Caney Creek Wilderness Area (CACR), Arkansas 

• Figure E-18: Upper Buffalo Wilderness Area (UPBU), Arkansas 

• Figure E-19: Mingo Wildlife Refuge (MING), Missouri 

• Figure E-20: Hercules Glade Wilderness Area (HEGL), Missouri 

• Figure E-21: Brigantine Wildlife Refuge (BRIG), New Jersey 
 E-2 

Uniform Rate of Progress Glide Path

Sipsey - Worst 20% Days

29.03

27.52

24.80

21.78

18.76

15.74

12.72

10.90

26.43

23.69

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-1a. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Sipsey (SIPS), 

Alabama and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 12 km modeling 

results. 

Uniform Rate of Progress Glide Path

Sipsey - Worst 20% Days (36 km)

29.03

27.82

24.80

21.78

18.76

15.74

12.72

10.90

23.66

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-1b. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Sipsey (SIPS), 

Alabama and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 36 km modeling 

results. 
 E-3 

Worst 20% Obs (left) vs 2002gt2a (right) at SIPS1

0

50

100

150

200

250

300

350

80 122 131 143 152 155 161 185 188 191 215 218 221 224 251 254 260 263 284 296 338 341 _ _ _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-1c. Comparison of observed (left) and 2002 Base G2 CMAQ 12 km modeled (right) 

daily extinction for Sipsey (SIPS), Alabama and Worst 20% (W20%) days in 2002. 

Worst 20% Obs (left) vs 2002gt2a (right) at SIPS1

0

50

100

150

200

250

300

350

80 122 131 143 152 155 161 185 188 191 215 218 221 224 251 254 260 263 284 296 338 341 _ _ _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-1d. Comparison of observed (left) and 2002 Base G2 CMAQ 36 km modeled (right) 

daily extinction for Sipsey (SIPS), Alabama and Worst 20% (W20%) days in 2002.
 E-4 

Bext Response (2018g2b - 2002gt2a) at SIPS1 on Worst 20% Days

-180

-160

-140

-120

-100

-80

-60

-40

-20

0

20

80 122 131 143 152 155 161 185 188 191 215 218 221 224 251 254 260 263 284 296 338 341 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-1e. Differences in modeled 2002 and 2018 Base G CMAQ 12 km results (2018-2002) 

daily extinction for Sipsey (SIPS), Alabama and Worst 20% (W20%) days in 2002.

Bext Response (2018g2a - 2002gt2a) at SIPS1 on Worst 20% Days

-140

-120

-100

-80

-60

-40

-20

0

20

80 122 131 143 152 155 161 185 188 191 215 218 221 224 251 254 260 263 284 296 338 341 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-1f. Differences in modeled 2002 and 2018 Base G CMAQ 36 km results (2018-2002) 

daily extinction for Sipsey (SIPS), Alabama and Worst 20% (W20%) days in 2002.
 E-5 

Uniform Rate of Progress Glide Path

Chassahowitzka - Worst 20% Days

25.75

24.52

22.31

19.86

17.41

14.96

12.50

11.03

23.22

21.85

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-2a. 2018 Visibility Projections and 2018 URP Glidepath in deciview for 

Chassahowitzka (CHAS), Florida and Worst 20% (W20%) days using 2002/2018 Base G2 

CMAQ 12 km modeling results. 

Uniform Rate of Progress Glide Path

Chassahowitzka - Worst 20% Days (36 km)

25.75

24.76

22.31

19.86

17.41

14.96

12.50

11.03

21.78

0

5

10

15

20

25

30

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-2b. 2018 Visibility Projections and 2018 URP Glidepath in deciview for 

Chassahowitzka (CHAS), Florida and Worst 20% (W20%) days using 2002/2018 Base G2 

CMAQ 36 km modeling results 
 E-6 

Worst 20% Obs (left) vs 2002gt2a (right) at CHAS1

0

20

40

60

80

100

120

140

160

180

200

5 17 26 41 44 47 56 89 116 128 155 200 206 236 260 278 281 290 296 329 332 341 350 _ _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-2c. Comparison of observed (left) and 2002 Base G2 CMAQ 12 km modeled (right) 

daily extinction for Chassahowitzka Wildlife Refuge (CHAS), Florida and Worst 20% (W20%) 

days in 2002. 

Worst 20% Obs (left) vs 2002gt2a (right) at CHAS1

0

20

40

60

80

100

120

140

160

180

5 17 26 41 44 47 56 89 116 128 155 200 206 236 260 278 281 290 296 329 332 341 350 _ _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-2d. Comparison of observed (left) and 2002 Base G2 CMAQ 36 km modeled (right) 

daily extinction for Chassahowitzka Wildlife Refuge (CHAS), Florida and Worst 20% (W20%) 

days in 2002.
 E-7 

Bext Response (2018g2b - 2002gt2a) at CHAS1 on Worst 20% Days

-120

-100

-80

-60

-40

-20

0

20

5 17 26 41 44 47 56 89 116 128 155 200 206 236 260 278 281 290 296 329 332 341 350 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-2e. Differences in modeled 2002 and 2018 Base G2 CMAQ 12 km results (2018-

2002) daily extinction for Chassahowitzka Wildlife Refuge (CHAS), Florida and Worst 20% 

(W20%) days in 2002. 

Bext Response (2018g2a - 2002gt2a) at CHAS1 on Worst 20% Days

-120

-100

-80

-60

-40

-20

0

20

5 17 26 41 44 47 56 89 116 128 155 200 206 236 260 278 281 290 296 329 332 341 350 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-2f. Differences in modeled 2002 and 2018 Base G2 CMAQ 36 km results (2018-

2002) daily extinction for Chassahowitzka Wildlife Refuge (CHAS), Florida and Worst 20% 

(W20%) days in 2002.
 E-8 

Uniform Rate of Progress Glide Path

Everglades - Worst 20% Days

22.30 21.45

19.92

18.22

16.52

14.82

13.11

12.09

20.98 20.65

0

5

10

15

20

25

30

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-3a. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Everglades 

(EVER), Florida and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 12 km 

modeling results. 

Uniform Rate of Progress Glide Path

Everglades - Worst 20% Days (36 km)

22.30 21.62

19.92

18.22

16.52

14.82

13.11

12.09

20.16

0

5

10

15

20

25

30

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-3b. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Everglades 

(EVER), Florida and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 36 km 

modeling results. 
 E-9 

Worst 20% Obs (left) vs 2002gt2a (right) at EVER1

0

20

40

60

80

100

120

140

160

180

200

5 35 44 56 62 74 95 98 113 125 128 152 158 218 236 257 281 290 305 311 332 341 350 362 _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-3c. Comparison of observed (left) and 2002 Base G2 CMAQ 12 km modeled (right) 

daily extinction for Everglades (EVER), Florida and Worst 20% (W20%) days in 2002. 

Worst 20% Obs (left) vs 2002gt2a (right) at EVER1

0

20

40

60

80

100

120

140

160

180

200

5 35 44 56 62 74 95 98 113 125 128 152 158 218 236 257 281 290 305 311 332 341 350 362 _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-3d. Comparison of observed (left) and 2002 Base G2 CMAQ 36 km modeled (right) 

daily extinction for Everglades (EVER), Florida and Worst 20% (W20%) days in 2002.
 E-10 

Bext Response (2018g2b - 2002gt2a) at EVER1 on Worst 20% Days

-50

-45

-40

-35

-30

-25

-20

-15

-10

-5

0

5

5 35 44 56 62 74 95 98 113 125 128 152 158 218 236 257 281 290 305 311 332 341 350 362 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-3e. Differences in modeled 2002 and 2018 Base G CMAQ 12 km results (2018-

2002) daily extinction for Everglades (EVER), Florida and Worst 20% (W20%) days in 2002. 

Bext Response (2018g2a - 2002gt2a) at EVER1 on Worst 20% Days

-50

-45

-40

-35

-30

-25

-20

-15

-10

-5

0

5

5 35 44 56 62 74 95 98 113 125 128 152 158 218 236 257 281 290 305 311 332 341 350 362 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-3f. Differences in modeled 2002 and 2018 Base G CMAQ 36 km results (2018-2002) 

daily extinction for Everglades (EVER), Florida and Worst 20% (W20%) days in 2002.
 E-11 

Uniform Rate of Progress Glide Path

Saint Marks - Worst 20% Days

26.31

25.09

22.89

20.45

18.01

15.57

13.13

11.67

24.40

22.89

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-4a. 2018 Visibility Projections and 2018 URP Glidepath in deciview for St. Marks 

(SAMA), Florida and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 12 km 

modeling results. 

Uniform Rate of Progress Glide Path

Saint Marks - Worst 20% Days (36 km)

26.31 25.33

22.89

20.45

18.01

15.57

13.13

11.67

22.69

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-4b. 2018 Visibility Projections and 2018 URP Glidepath in deciview for St. Marks 

(SAMA), Florida and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 36 km 

modeling results. 
 E-12 

Worst 20% Obs (left) vs 2002gt2a (right) at SAMA1

0

50

100

150

200

250

35 44 47 56 89 95 98 107 116 122 125 128 131 155 185 188 197 200 260 290 293 296 341 _ _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-4c. Comparison of observed (left) and 2002 Base G2 CMAQ 12 km modeled (right) 

daily extinction for St. Marks (SAMA), Florida and Worst 20% (W20%) days in 2002. 

Worst 20% Obs (left) vs 2002gt2a (right) at SAMA1

0

50

100

150

200

250

35 44 47 56 89 95 98 107 116 122 125 128 131 155 185 188 197 200 260 290 293 296 341 _ _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-4d. Comparison of observed (left) and 2002 Base G2 CMAQ 36 km modeled (right) 

daily extinction for St. Marks (SAMA), Florida and Worst 20% (W20%) days in 2002.
 E-13 

Bext Response (2018g2b - 2002gt2a) at SAMA1 on Worst 20% Days

-100

-80

-60

-40

-20

0

20

35 44 47 56 89 95 98 107 116 122 125 128 131 155 185 188 197 200 260 290 293 296 341 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-4e. Differences in modeled 2002 and 2018 Base G CMAQ 12 km results (2018-

2002) daily extinction for St. Marks (SAMA), Florida and Worst 20% (W20%) days in 2002. 

Bext Response (2018g2a - 2002gt2a) at SAMA1 on Worst 20% Days

-100

-80

-60

-40

-20

0

20

35 44 47 56 89 95 98 107 116 122 125 128 131 155 185 188 197 200 260 290 293 296 341 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-4f. Differences in modeled 2002 and 2018 Base G CMAQ 36 km results (2018-2002) 

daily extinction for St. Marks (SAMA), Florida and Worst 20% (W20%) days in 2002.
 E-14 

Uniform Rate of Progress Glide Path

Cohutta - Worst 20% Days

30.25

28.63

25.71

22.46

19.22

15.97

12.73

10.78

27.05

22.84

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-5a. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Cohutta 

(COHU), Georgia and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 12 km 

modeling results. 

Uniform Rate of Progress Glide Path

Cohutta - Worst 20% Days (36 km)

30.25

28.96

25.71

22.46

19.22

15.97

12.73

10.78

22.92

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-5b. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Cohutta 

(COHU), Georgia and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 36 km 

modeling results. 
 E-15 

Worst 20% Obs (left) vs 2002gt2a (right) at COHU1

0

100

200

300

400

500

600

56 122 152 155 185 188 191 197 206 215 218 221 224 227 233 248 251 260 263 266 281 _ _ _ _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-5c. Comparison of observed (left) and 2002 Base G2 CMAQ 12 km modeled (right) 

daily extinction for Cohutta (COHU), Georgia and Worst 20% (W20%) days in 2002. 

Worst 20% Obs (left) vs 2002gt2a (right) at COHU1

0

100

200

300

400

500

600

56 122 152 155 185 188 191 197 206 215 218 221 224 227 233 248 251 260 263 266 281 _ _ _ _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-5d. Comparison of observed (left) and 2002 Base G2 CMAQ 36 km modeled (right) 

daily extinction for Cohutta (COHU), Georgia and Worst 20% (W20%) days in 2002.
 E-16 

Bext Response (2018g2b - 2002gt2a) at COHU1 on Worst 20% Days

-300

-250

-200

-150

-100

-50

0

50

56 122 152 155 185 188 191 197 206 215 218 221 224 227 233 248 251 260 263 266 281 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-5e. Differences in modeled 2002 and 2018 Base G CMAQ 12 km results (2018-

2002) daily extinction for Cohutta (COHU), Georgia and Worst 20% (W20%) days in 2002. 

Bext Response (2018g2a - 2002gt2a) at COHU1 on Worst 20% Days

-300

-250

-200

-150

-100

-50

0

50

56 122 152 155 185 188 191 197 206 215 218 221 224 227 233 248 251 260 263 266 281 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-5f. Differences in modeled 2002 and 2018 Base G CMAQ 36 km results (2018-2002) 

daily extinction for Cohutta (COHU), Georgia and Worst 20% (W20%) days in 2002.
 E-17 

Uniform Rate of Progress Glide Path

Okefenokee - Worst 20% Days

27.13

25.81

23.42

20.76

18.11

15.45

12.80

11.21

25.38

23.85

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-6a. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Okefenokee (OKEF), 

Georgia and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 12 km modeling results. 

Uniform Rate of Progress Glide Path

Okefenokee - Worst 20% Days (36 km)

27.13

26.07

23.42

20.76

18.11

15.45

12.80

11.21

23.61

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-6a. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Okefenokee (OKEF), 

Georgia and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 36 km modeling results. 
 E-18 

Worst 20% Obs (left) vs 2002gt2a (right) at OKEF1

0

50

100

150

200

250

300

350

17 23 44 56 89 95 122 128 155 188 197 200 218 236 254 260 263 281 296 308 338 341 350 _ _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-6c. Comparison of observed (left) and 2002 Base G2 CMAQ 12 km modeled (right) daily 

extinction for Okefenokee (OKEF), Georgia and Worst 20% (W20%) days in 2002. 

Worst 20% Obs (left) vs 2002gt2a (right) at OKEF1

0

50

100

150

200

250

300

350

17 23 44 56 89 95 122 128 155 188 197 200 218 236 254 260 263 281 296 308 338 341 350 _ _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-6d. Comparison of observed (left) and 2002 Base G2 CMAQ 36 km modeled (right) daily 

extinction for Okefenokee (OKEF), Georgia and Worst 20% (W20%) days in 2002.
 E-19 

Bext Response (2018g2b - 2002gt2a) at OKEF1 on Worst 20% Days

-140

-120

-100

-80

-60

-40

-20

0

20

40

17 23 44 56 89 95 122 128 155 188 197 200 218 236 254 260 263 281 296 308 338 341 350 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-6e. Differences in modeled 2002 and 2018 Base G CMAQ 12 km results (2018-2002) daily 

extinction for Okefenokee (OKEF), Georgia and Worst 20% (W20%) days in 2002. 

Bext Response (2018g2a - 2002gt2a) at OKEF1 on Worst 20% Days

-140

-120

-100

-80

-60

-40

-20

0

20

40

17 23 44 56 89 95 122 128 155 188 197 200 218 236 254 260 263 281 296 308 338 341 350 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-6f. Differences in modeled 2002 and 2018 Base G CMAQ 36 km results (2018-2002) daily 

extinction for Okefenokee (OKEF), Georgia and Worst 20% (W20%) days in 2002.
 E-20 

Uniform Rate of Progress Glide Path

Mammoth Cave - Worst 20% Days

31.37

29.68

26.64

23.26

19.87

16.49

13.11

11.08

28.04

25.56

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-7a. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Mammoth Cave 

(MACA), Kentucky and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 12 km modeling 

results. 

Uniform Rate of Progress Glide Path

Mammoth Cave - Worst 20% Days (36 km)

31.37

30.02

26.64

23.26

19.87

16.49

13.11

11.08

25.63

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-7b. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Mammoth Cave 

(MACA), Kentucky and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 36 km modeling 

results. 
 E-21 

Worst 20% Obs (left) vs 2002gt2a (right) at MACA1

0

50

100

150

200

250

300

350

400

450

500

86 149 152 155 170 173 185 191 197 203 206 212 215 218 224 233 236 239 245 251 254 260 263 341 _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-7c. Comparison of observed (left) and 2002 Base G2 CMAQ 12 km modeled (right) daily 

extinction for Mammoth Cave (MACA), Kentucky and Worst 20% (W20%) days in 2002. 

Worst 20% Obs (left) vs 2002gt2a (right) at MACA1

0

100

200

300

400

500

600

700

86 149 152 155 170 173 185 191 197 203 206 212 215 218 224 233 236 239 245 251 254 260 263 341 _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-7d. Comparison of observed (left) and 2002 Base G2 CMAQ 36 km modeled (right) daily 

extinction for Mammoth Cave (MACA), Kentucky and Worst 20% (W20%) days in 2002.
 E-22 

Bext Response (2018g2b - 2002gt2a) at MACA1 on Worst 20% Days

-350

-300

-250

-200

-150

-100

-50

0

50

86 149 152 155 170 173 185 191 197 203 206 212 215 218 224 233 236 239 245 251 254 260 263 341 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-7d. Differences in modeled 2002 and 2018 Base G CMAQ 12 km results (2018-2002) daily 

extinction for Mammoth Cave (MACA), Kentucky and Worst 20% (W20%) days in 2002. 

Bext Response (2018g2a - 2002gt2a) at MACA1 on Worst 20% Days

-450

-400

-350

-300

-250

-200

-150

-100

-50

0

50

86 149 152 155 170 173 185 191 197 203 206 212 215 218 224 233 236 239 245 251 254 260 263 341 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-7e. Differences in modeled 2002 and 2018 Base G CMAQ 36 km results (2018-2002) daily 

extinction for Mammoth Cave (MACA), Kentucky and Worst 20% (W20%) days in 2002.
 E-23 

Uniform Rate of Progress Glide Path

Linville Gorge - Worst 20% Days

28.77

27.31

24.67

21.74

18.81

15.88

12.95

11.19

24.99

21.98

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-8a. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Linville Gorge (LIGO), 

North Carolina and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 12 km modeling results. 

Uniform Rate of Progress Glide Path

Linville Gorge - Worst 20% Days (36 km)

28.77

27.60

24.67

21.74

18.81

15.88

12.95

11.19

21.78

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-8b. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Linville Gorge (LIGO), 

North Carolina and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 36 km modeling results.. 
 E-24 

Worst 20% Obs (left) vs 2002gt2a (right) at LIGO1

0

50

100

150

200

250

300

350

400

122 128 137 149 152 170 191 203 206 209 212 215 218 221 224 233 236 239 248 251 254 260 _ _ _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-8c. Comparison of observed (left) and 2002 Base G2 CMAQ 12 km modeled (right) daily 

extinction for Linville Gorge (LIGO), North Carolina and Worst 20% (W20%) days in 2002. 

Worst 20% Obs (left) vs 2002gt2a (right) at LIGO1

0

50

100

150

200

250

300

350

400

122 128 137 149 152 170 191 203 206 209 212 215 218 221 224 233 236 239 248 251 254 260 _ _ _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-8d. Comparison of observed (left) and 2002 Base G2 CMAQ 36 km modeled (right) daily 

extinction for Linville Gorge (LIGO), North Carolina and Worst 20% (W20%) days in 2002.
 E-25 

Bext Response (2018g2b - 2002gt2a) at LIGO1 on Worst 20% Days

-250

-200

-150

-100

-50

0

50

122 128 137 149 152 170 191 203 206 209 212 215 218 221 224 233 236 239 248 251 254 260 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-8e. Differences in modeled 2002 and 2018 Base G CMAQ 12 km results (2018-2002) daily 

extinction for Linville Gorge (LIGO), North Carolina and Worst 20% (W20%) days in 2002. 

Bext Response (2018g2a - 2002gt2a) at LIGO1 on Worst 20% Days

-250

-200

-150

-100

-50

0

50

122 128 137 149 152 170 191 203 206 209 212 215 218 221 224 233 236 239 248 251 254 260 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-8f. Differences in modeled 2002 and 2018 Base G CMAQ 36 km results (2018-2002) daily 

extinction for Linville Gorge (LIGO), North Carolina and Worst 20% (W20%) days in 2002.
 E-26 

Uniform Rate of Progress Glide Path

Shining Rock - Worst 20% Days

28.66

27.22

24.65

21.78

18.92

16.05

13.19

11.47

25.01

22.11

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-9a. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Shining Rock (SHRO), 

North Carolina and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 12 km modeling results. 

Uniform Rate of Progress Glide Path

Shining Rock - Worst 20% Days (36 km)

28.66

27.51

24.65

21.78

18.92

16.05

13.19

11.47

21.45

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-9b. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Shining Rock (SHRO), 

North Carolina and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 36 km modeling results. 
 E-27 

Worst 20% Obs (left) vs 2002gt2a (right) at SHRO1

0

100

200

300

400

500

600

128 137 152 155 161 164 170 182 185 188 191 197 203 206 212 215 218 221 224 233 248 251 254 260 266 Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-9c. Comparison of observed (left) and 2002 Base G2 CMAQ 12 km modeled (right) daily 

extinction for Shining Rock (SHRO), North Carolina and Worst 20% (W20%) days in 2002. 

Worst 20% Obs (left) vs 2002gt2a (right) at SHRO1

0

100

200

300

400

500

600

128 137 152 155 161 164 170 182 185 188 191 197 203 206 212 215 218 221 224 233 248 251 254 260 266 Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-9d. Comparison of observed (left) and 2002 Base G2 CMAQ 36 km modeled (right) daily 

extinction for Shining Rock (SHRO), North Carolina and Worst 20% (W20%) days in 2002.
 E-28 

Bext Response (2018g2b - 2002gt2a) at SHRO1 on Worst 20% Days

-160

-140

-120

-100

-80

-60

-40

-20

0

20

128 137 152 155 161 164 170 182 185 188 191 197 203 206 212 215 218 221 224 233 248 251 254 260 266 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-9e. Differences in modeled 2002 and 2018 Base G CMAQ 12 km results (2018-2002) daily 

extinction for Shining Rock (SHRO), North Carolina and Worst 20% (W20%) days in 2002. 

Bext Response (2018g2a - 2002gt2a) at SHRO1 on Worst 20% Days

-160

-140

-120

-100

-80

-60

-40

-20

0

20

128 137 152 155 161 164 170 182 185 188 191 197 203 206 212 215 218 221 224 233 248 251 254 260 266 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-9f. Differences in modeled 2002 and 2018 Base G CMAQ 36 km results (2018-2002) daily 

extinction for Shining Rock (SHRO), North Carolina and Worst 20% (W20%) days in 2002.
 E-29 

Uniform Rate of Progress Glide Path

Swanquarter - Worst 20% Days

24.71

23.62

21.64

19.45

17.25

15.06

12.86

11.55

22.12

20.37

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-10a. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Swanquarter (SWAN), 

North Carolina and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 12 km modeling results. 

Uniform Rate of Progress Glide Path

Swanquarter - Worst 20% Days (36 km)

24.71 23.84

21.64

19.45

17.25

15.06

12.86

11.55

20.23

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-10b. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Swanquarter (SWAN), 

North Carolina and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 36 km modeling results.. 
 E-30 

Worst 20% Obs (left) vs 2002gt2a (right) at SWAN1

0

50

100

150

200

250

5 53 56 110 119 122 128 146 185 188 197 200 209 212 233 236 254 260 278 293 326 329 341 _ _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-10c. Comparison of observed (left) and 2002 Base G2 CMAQ 12 km modeled (right) daily 

extinction for Swanquarter (SWAN), North Carolina and Worst 20% (W20%) days in 2002. 

Worst 20% Obs (left) vs 2002gt2a (right) at SWAN1

0

50

100

150

200

250

5 53 56 110 119 122 128 146 185 188 197 200 209 212 233 236 254 260 278 293 326 329 341 _ _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-10d. Comparison of observed (left) and 2002 Base G2 CMAQ 36 km modeled (right) daily 

extinction for Swanquarter (SWAN), North Carolina and Worst 20% (W20%) days in 2002.
 E-31 

Bext Response (2018g2b - 2002gt2a) at SWAN1 on Worst 20% Days

-100

-80

-60

-40

-20

0

20

5 53 56 110 119 122 128 146 185 188 197 200 209 212 233 236 254 260 278 293 326 329 341 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-10e. Differences in modeled 2002 and 2018 Base G CMAQ 12 km results (2018-2002) daily 

extinction for Swanquarter (SWAN), North Carolina and Worst 20% (W20%) days in 2002. 

Bext Response (2018g2a - 2002gt2a) at SWAN1 on Worst 20% Days

-100

-80

-60

-40

-20

0

20

5 53 56 110 119 122 128 146 185 188 197 200 209 212 233 236 254 260 278 293 326 329 341 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-10f. Differences in modeled 2002 and 2018 Base G CMAQ 36 km results (2018-2002) daily 

extinction for Swanquarter (SWAN), North Carolina and Worst 20% (W20%) days in 2002.
 E-32 

Uniform Rate of Progress Glide Path

Cape Romain - Worst 20% Days

26.48

25.28

23.12

20.73

18.33

15.94

13.54

12.10

24.46

22.72

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-11a. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Cape Romain 

(ROMA), South Carolina and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 12 km modeling 

results. 

Uniform Rate of Progress Glide Path

Cape Romain - Worst 20% Days (36 km)

26.48 25.52

23.12

20.73

18.33

15.94

13.54

12.10

22.72

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-11b. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Cape Romain 

(ROMA), South Carolina and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 36 km modeling 

results. 
 E-33 

Worst 20% Obs (left) vs 2002gt2a (right) at ROMA1

0

50

100

150

200

250

300

17 29 44 47 53 110 122 155 158 182 185 188 197 200 206 212 236 254 257 260 293 296 299 341 _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-11c. Comparison of observed (left) and 2002 Base G2 CMAQ 12 km modeled (right) daily 

extinction for Cape Romain (ROMA), South Carolina and Worst 20% (W20%) days in 2002. 

Worst 20% Obs (left) vs 2002gt2a (right) at ROMA1

0

50

100

150

200

250

300

17 29 44 47 53 110 122 155 158 182 185 188 197 200 206 212 236 254 257 260 293 296 299 341 _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-11d. Comparison of observed (left) and 2002 Base G2 CMAQ 36 km modeled (right) daily 

extinction for Cape Romain (ROMA), South Carolina and Worst 20% (W20%) days in 2002.
 E-34 

Bext Response (2018g2b - 2002gt2a) at ROMA1 on Worst 20% Days

-120

-100

-80

-60

-40

-20

0

20

17 29 44 47 53 110 122 155 158 182 185 188 197 200 206 212 236 254 257 260 293 296 299 341 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-11e. Differences in modeled 2002 and 2018 Base G CMAQ 12 km results (2018-2002) daily 

extinction for Cape Romain (ROMA), South Carolina and Worst 20% (W20%) days in 2002. 

Bext Response (2018g2a - 2002gt2a) at ROMA1 on Worst 20% Days

-120

-100

-80

-60

-40

-20

0

20

17 29 44 47 53 110 122 155 158 182 185 188 197 200 206 212 236 254 257 260 293 296 299 341 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-11f. Differences in modeled 2002 and 2018 Base G CMAQ 36 km results (2018-2002) daily 

extinction for Cape Romain (ROMA), South Carolina and Worst 20% (W20%) days in 2002.
 E-35 

Uniform Rate of Progress Glide Path

Great Smoky Mountains - Worst 20% Days

30.28

28.67

25.79

22.59

19.38

16.18

12.97

11.05

26.72

23.66

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-12a. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Great Smoky 

Mountains (GRSM), Tennessee-North Carolina and Worst 20% (W20%) days using 2002/2018 Base G2 

CMAQ 12 km modeling results. 

Uniform Rate of Progress Glide Path

Great Smoky Mountains - Worst 20% Days (36 km)

30.28

28.99

25.79

22.59

19.38

16.18

12.97

11.05

22.87

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-12b. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Great Smoky 

Mountains (GRSM), Tennessee-North Carolina and Worst 20% (W20%) days using 2002/2018 Base G2 

CMAQ 36 km modeling results.. 
 E-36 

Worst 20% Obs (left) vs 2002gt2a (right) at GRSM1

0

50

100

150

200

250

300

350

400

56 122 128 137 152 164 170 173 182 188 191 197 203 212 215 218 221 224 227 233 248 251 254 260 _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-12c. Comparison of observed (left) and 2002 Base G2 CMAQ 12 km modeled (right) daily 

extinction for Great Smoky Mountains (GRSM), Tennessee-North Carolina and Worst 20% (W20%) days 

in 2002. 

Worst 20% Obs (left) vs 2002gt2a (right) at GRSM1

0

50

100

150

200

250

300

350

400

56 122 128 137 152 164 170 173 182 188 191 197 203 212 215 218 221 224 227 233 248 251 254 260 _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-12d. Comparison of observed (left) and 2002 Base G2 CMAQ 12 km modeled (right) daily 

extinction for Great Smoky Mountains (GRSM), Tennessee-North Carolina and Worst 20% (W20%) days 

in 2002.
 E-37 

Bext Response (2018g2b - 2002gt2a) at GRSM1 on Worst 20% Days

-200

-150

-100

-50

0

50

56 122 128 137 152 164 170 173 182 188 191 197 203 212 215 218 221 224 227 233 248 251 254 260 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-12e. Differences in modeled 2002 and 2018 Base G CMAQ 12 km results (2018-2002) daily 

extinction for Great Smoky Mountains (GRSM), Tennessee-North Carolina and Worst 20% (W20%) days 

in 2002. 

Bext Response (2018g2a - 2002gt2a) at GRSM1 on Worst 20% Days

-250

-200

-150

-100

-50

0

50

56 122 128 137 152 164 170 173 182 188 191 197 203 212 215 218 221 224 227 233 248 251 254 260 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-12f. Differences in modeled 2002 and 2018 Base G CMAQ 12 km results (2018-2002) daily 

extinction for Great Smoky Mountains (GRSM), Tennessee-North Carolina and Worst 20% (W20%) days 

in 2002.
 E-38 

Uniform Rate of Progress Glide Path

James River Face - Worst 20% Days

29.12

27.62

24.91

21.91

18.90

15.90

12.90

11.09

25.28

22.59

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-13a. 2018 Visibility Projections and 2018 URP Glidepath in deciview for James River Face 

(JARI), Virginia and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 12 km modeling results. 

Uniform Rate of Progress Glide Path

James River Face - Worst 20% Days (36 km)

29.12

27.92

24.91

21.91

18.90

15.90

12.90

11.09

22.40

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-13b. 2018 Visibility Projections and 2018 URP Glidepath in deciview for James River Face 

(JARI), Virginia and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 36 km modeling results. 
 E-39 

Worst 20% Obs (left) vs 2002gt2a (right) at JARI1

0

50

100

150

200

250

300

350

137 146 152 155 161 182 185 191 197 200 203 212 215 218 224 233 236 239 254 257 263 266 272 275 _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-13c. Comparison of observed (left) and 2002 Base G2 CMAQ 12 km modeled (right) daily 

extinction for James River Face (JARI), Virginia and Worst 20% (W20%) days in 2002. 

Worst 20% Obs (left) vs 2002gt2a (right) at JARI1

0

50

100

150

200

250

300

350

137 146 152 155 161 182 185 191 197 200 203 212 215 218 224 233 236 239 254 257 263 266 272 275 _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-13d. Comparison of observed (left) and 2002 Base G2 CMAQ 36 km modeled (right) daily 

extinction for James River Face (JARI), Virginia and Worst 20% (W20%) days in 2002.
 E-40 

Bext Response (2018g2b - 2002gt2a) at JARI1 on Worst 20% Days

-180

-160

-140

-120

-100

-80

-60

-40

-20

0

20

137 146 152 155 161 182 185 191 197 200 203 212 215 218 224 233 236 239 254 257 263 266 272 275 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-13e. Differences in modeled 2002 and 2018 Base G CMAQ 12 km results (2018-2002) daily 

extinction for James River Face (JARI), Virginia and Worst 20% (W20%) days in 2002. 

Bext Response (2018g2a - 2002gt2a) at JARI1 on Worst 20% Days

-180

-160

-140

-120

-100

-80

-60

-40

-20

0

20

137 146 152 155 161 182 185 191 197 200 203 212 215 218 224 233 236 239 254 257 263 266 272 275 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-13f. Differences in modeled 2002 and 2018 Base G CMAQ 36 km results (2018-2002) daily 

extinction for James River Face (JARI), Virginia and Worst 20% (W20%) days in 2002.
 E-41 

Uniform Rate of Progress Glide Path

Shenandoah - Worst 20% Days

29.31

27.81

25.12

22.13

19.14

16.15

13.16

11.37

24.89

22.11

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-14a. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Shenandoah (SHEN), 

Virginia and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 12 km modeling results. 

Uniform Rate of Progress Glide Path

Shenandoah - Worst 20% Days (36 km)

29.31

28.11

25.12

22.13

19.14

16.15

13.16

11.37

21.98

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-14b. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Shenandoah (SHEN), 

Virginia and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 36 km modeling results.. 
 E-42 

Worst 20% Obs (left) vs 2002gt2a (right) at SHEN1

0

100

200

300

400

500

600

59 146 149 155 161 164 170 176 182 185 197 200 203 212 215 224 233 236 239 254 257 260 272 275 _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-14c. Comparison of observed (left) and 2002 Base G2 CMAQ 12 km modeled (right) daily 

extinction for Shenandoah (SHEN), Virginia and Worst 20% (W20%) days in 2002. 

Worst 20% Obs (left) vs 2002gt2a (right) at SHEN1

0

50

100

150

200

250

300

350

400

450

59 146 149 155 161 164 170 176 182 185 197 200 203 212 215 224 233 236 239 254 257 260 272 275 _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-14d. Comparison of observed (left) and 2002 Base G2 CMAQ 36 km modeled (right) daily 

extinction for Shenandoah (SHEN), Virginia and Worst 20% (W20%) days in 2002.
 E-43 

Bext Response (2018g2b - 2002gt2a) at SHEN1 on Worst 20% Days

-350

-300

-250

-200

-150

-100

-50

0

50

59 146 149 155 161 164 170 176 182 185 197 200 203 212 215 224 233 236 239 254 257 260 272 275 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-14e. Differences in modeled 2002 and 2018 Base G CMAQ 12 km results (2018-2002) daily 

extinction for Shenandoah (SHEN), Virginia and Worst 20% (W20%) days in 2002. 

Bext Response (2018g2a - 2002gt2a) at SHEN1 on Worst 20% Days

-350

-300

-250

-200

-150

-100

-50

0

50

59 146 149 155 161 164 170 176 182 185 197 200 203 212 215 224 233 236 239 254 257 260 272 275 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-14f. Differences in modeled 2002 and 2018 Base G CMAQ 36 km results (2018-2002) daily 

extinction for Shenandoah (SHEN), Virginia and Worst 20% (W20%) days in 2002.
 E-44 

Uniform Rate of Progress Glide Path

Dolly Sods - Worst 20% Days

29.04

27.49

24.69

21.57

18.46

15.34

12.23

10.36

24.78

21.64

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-15a. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Dolly Sods (DOSO), 

West Virginia and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 12 km modeling results. 

Uniform Rate of Progress Glide Path

Dolly Sods - Worst 20% Days (36 km)

29.04

27.80

24.69

21.57

18.46

15.34

12.23

10.36

21.71

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-15b. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Dolly Sods (DOSO), 

West Virginia and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 36 km modeling results. 
 E-45 

Worst 20% Obs (left) vs 2002gt2a (right) at DOSO1

0

50

100

150

200

250

300

350

400

450

500

122 128 137 146 149 152 155 161 164 170 173 176 182 191 206 224 227 254 257 260 263 272 275 _ _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-15c. Comparison of observed (left) and 2002 Base G2 CMAQ 12 km modeled (right) daily 

extinction for Dolly Sods (DOSO), West Virginia and Worst 20% (W20%) days in 2002. 

Worst 20% Obs (left) vs 2002gt2a (right) at DOSO1

0

50

100

150

200

250

300

350

400

450

500

122 128 137 146 149 152 155 161 164 170 173 176 182 191 206 224 227 254 257 260 263 272 275 _ _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-15d. Comparison of observed (left) and 2002 Base G2 CMAQ 36 km modeled (right) daily 

extinction for Dolly Sods (DOSO), West Virginia and Worst 20% (W20%) days in 2002.
 E-46 

Bext Response (2018g2b - 2002gt2a) at DOSO1 on Worst 20% Days

-300

-250

-200

-150

-100

-50

0

50

122 128 137 146 149 152 155 161 164 170 173 176 182 191 206 224 227 254 257 260 263 272 275 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-15e. Differences in modeled 2002 and 2018 Base G CMAQ 12 km results (2018-2002) daily 

extinction for Dolly Sods (DOSO), West Virginia and Worst 20% (W20%) days in 2002. 

Bext Response (2018g2a - 2002gt2a) at DOSO1 on Worst 20% Days

-300

-250

-200

-150

-100

-50

0

50

122 128 137 146 149 152 155 161 164 170 173 176 182 191 206 224 227 254 257 260 263 272 275 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-15f. Differences in modeled 2002 and 2018 Base G CMAQ 36 km results (2018-2002) daily 

extinction for Dolly Sods (DOSO), West Virginia and Worst 20% (W20%) days in 2002.
 E-47 

Uniform Rate of Progress Glide Path

Breton - Worst 20% Days

26.00

24.82

22.71

20.37

18.02

15.68

13.34

11.93

24.89

23.41

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-16a. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Breton Island (BRET), 

Louisiana and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 12 km modeling results. 

Uniform Rate of Progress Glide Path

Breton - Worst 20% Days (36 km)

26.00 25.06

22.71

20.37

18.02

15.68

13.34

11.93

23.35

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-16b. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Breton Island (BRET), 

Louisiana and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 36 km modeling results. 
 E-48 

Worst 20% Obs (left) vs 2002gt2a (right) at BRET1

0

20

40

60

80

100

120

140

160

180

44 47 74 125 143 179 194 197 200 206 215 239 248 251 254 257 260 263 272 281 284 287 305 311 _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-16c. Comparison of observed (left) and 2002 Base G2 CMAQ 12 km modeled (right) daily 

extinction for Breton Island (BRET), Louisiana and Worst 20% (W20%) days in 2002. 

Worst 20% Obs (left) vs 2002gt2a (right) at BRET1

0

20

40

60

80

100

120

140

160

180

44 47 74 125 143 179 194 197 200 206 215 239 248 251 254 257 260 263 272 281 284 287 305 311 _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-16d. Comparison of observed (left) and 2002 Base G2 CMAQ 36 km modeled (right) daily 

extinction for Breton Island (BRET), Louisiana and Worst 20% (W20%) days in 2002.
 E-49 

Bext Response (2018g2b - 2002gt2a) at BRET1 on Worst 20% Days

-60

-50

-40

-30

-20

-10

0

10

44 47 74 125 143 179 194 197 200 206 215 239 248 251 254 257 260 263 272 281 284 287 305 311 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-16e. Differences in modeled 2002 and 2018 Base G CMAQ 12 km results (2018-2002) daily 

extinction for Breton Island (BRET), Louisiana and Worst 20% (W20%) days in 2002. 

Bext Response (2018g2a - 2002gt2a) at BRET1 on Worst 20% Days

-70

-60

-50

-40

-30

-20

-10

0

10

44 47 74 125 143 179 194 197 200 206 215 239 248 251 254 257 260 263 272 281 284 287 305 311 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-16f. Differences in modeled 2002 and 2018 Base G CMAQ 36 km results (2018-2002) daily 

extinction for Breton Island (BRET), Louisiana and Worst 20% (W20%) days in 2002.
 E-50 

Uniform Rate of Progress Glide Path

Caney Creek - Worst 20% Days

26.36

25.13

22.91

20.45

17.98

15.51

13.05

11.57

24.01

22.38

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-17a. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Caney Creek (CACR), 

Arkansas and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 12 km modeling results. 

Uniform Rate of Progress Glide Path

Caney Creek - Worst 20% Days (36 km)

26.36

25.38

22.91

20.45

17.98

15.51

13.05

11.57

22.34

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-17b. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Caney Creek (CACR), 

Arkansas and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 36 km modeling results. 
 E-51 

Worst 20% Obs (left) vs 2002gt2a (right) at CACR1

0

50

100

150

200

250

300

350

400

80 128 143 155 170 173 188 191 200 203 215 218 221 239 242 248 251 254 257 260 296 320 341 _ _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-17c. Comparison of observed (left) and 2002 Base G2 CMAQ 12 km modeled (right) daily 

extinction for Caney Creek (CACR), Arkansas and Worst 20% (W20%) days in 2002. 

Worst 20% Obs (left) vs 2002gt2a (right) at CACR1

0

50

100

150

200

250

300

350

80 128 143 155 170 173 188 191 200 203 215 218 221 239 242 248 251 254 257 260 296 320 341 _ _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-17d. Comparison of observed (left) and 2002 Base G2 CMAQ 36 km modeled (right) daily 

extinction for Caney Creek (CACR), Arkansas and Worst 20% (W20%) days in 2002.
 E-52 

Bext Response (2018g2b - 2002gt2a) at CACR1 on Worst 20% Days

-250

-200

-150

-100

-50

0

50

80 128 143 155 170 173 188 191 200 203 215 218 221 239 242 248 251 254 257 260 296 320 341 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-17e. Differences in modeled 2002 and 2018 Base G CMAQ 12 km results (2018-2002) daily 

extinction for Caney Creek (CACR), Arkansas and Worst 20% (W20%) days in 2002. 

Bext Response (2018g2a - 2002gt2a) at CACR1 on Worst 20% Days

-250

-200

-150

-100

-50

0

50

80 128 143 155 170 173 188 191 200 203 215 218 221 239 242 248 251 254 257 260 296 320 341 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-17f. Differences in modeled 2002 and 2018 Base G CMAQ 36 km results (2018-2002) daily 

extinction for Caney Creek (CACR), Arkansas and Worst 20% (W20%) days in 2002.
 E-53 

Uniform Rate of Progress Glide Path

Upper Buffalo - Worst 20% Days

26.27

25.03

22.82

20.35

17.89

15.43

12.96

11.49

23.74

22.12

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-18a. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Upper Buffalo (UPBU), 

Arkansas and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 12 km modeling results. 

Uniform Rate of Progress Glide Path

Upper Buffalo - Worst 20% Days (36 km)

26.27 25.28

22.82

20.35

17.89

15.43

12.96

11.49

22.19

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-18b. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Upper Buffalo (UPBU), 

Arkansas and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 36 km modeling results. 
 E-54 

Worst 20% Obs (left) vs 2002gt2a (right) at UPBU1

0

50

100

150

200

250

300

350

400

450

500

128 143 158 170 173 179 191 197 203 206 215 218 221 224 239 242 248 251 254 257 269 296 320 332 _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-18c. Comparison of observed (left) and 2002 Base G2 CMAQ 12 km modeled (right) daily 

extinction for Upper Buffalo (UPBU), Arkansas and Worst 20% (W20%) days in 2002. 

Worst 20% Obs (left) vs 2002gt2a (right) at UPBU1

0

50

100

150

200

250

300

350

128 143 158 170 173 179 191 197 203 206 215 218 221 224 239 242 248 251 254 257 269 296 320 332 _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-18d. Comparison of observed (left) and 2002 Base G2 CMAQ 12 km modeled (right) daily 

extinction for Upper Buffalo (UPBU), Arkansas and Worst 20% (W20%) days in 2002
 E-55 

Bext Response (2018g2b - 2002gt2a) at UPBU1 on Worst 20% Days

-300

-250

-200

-150

-100

-50

0

50

128 143 158 170 173 179 191 197 203 206 215 218 221 224 239 242 248 251 254 257 269 296 320 332 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-18e. Differences in modeled 2002 and 2018 Base G CMAQ 12 km results (2018-2002) daily 

extinction for Upper Buffalo (UPBU), Arkansas and Worst 20% (W20%) days in 2002. 

Bext Response (2018g2a - 2002gt2a) at CACR1 on Worst 20% Days

-300

-250

-200

-150

-100

-50

0

50

80 128 143 155 170 173 188 191 200 203 215 218 221 239 242 248 251 254 257 260 296 320 341 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-18f. Differences in modeled 2002 and 2018 Base G CMAQ 36 km results (2018-2002) daily 

extinction for Upper Buffalo (UPBU), Arkansas and Worst 20% (W20%) days in 2002.
 E-56 

Uniform Rate of Progress Glide Path

Mingo - Worst 20% Days

28.05

26.68

24.22

21.48

18.74

16.00

13.26

11.62

25.37

23.85

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-19a. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Mingo (MING), 

Missouri and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 12 km modeling results. 

Uniform Rate of Progress Glide Path

Mingo - Worst 20% Days (36 km)

28.05

26.95

24.22

21.48

18.74

16.00

13.26

11.62

24.02

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-19b. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Mingo (MING), 

Missouri and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 36 km modeling results.. 
 E-57 

Worst 20% Obs (left) vs 2002gt2a (right) at MING1

-50

0

50

100

150

200

250

300

350

400

450

20 77 95 158 185 188 191 194 197 206 215 218 221 239 242 245 251 260 272 296 332 341 _ _ _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-19c. Comparison of observed (left) and 2002 Base G2 CMAQ 12 km modeled (right) daily 

extinction for Mingo (MING), Missouri and Worst 20% (W20%) days in 2002. 

Worst 20% Obs (left) vs 2002gt2a (right) at MING1

-50

0

50

100

150

200

250

300

350

400

20 77 95 158 185 188 191 194 197 206 215 218 221 239 242 245 251 260 272 296 332 341 _ _ _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-19d. Comparison of observed (left) and 2002 Base G2 CMAQ 36 km modeled (right) daily 

extinction for Mingo (MING), Missouri and Worst 20% (W20%) days in 2002.
 E-58 

Bext Response (2018g2b - 2002gt2a) at MING1 on Worst 20% Days

-250

-200

-150

-100

-50

0

50

20 77 95 158 185 188 191 194 197 206 215 218 221 239 242 245 251 260 272 296 332 341 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-19e. Differences in modeled 2002 and 2018 Base G CMAQ 12 km results (2018-2002) daily 

extinction for Mingo (MING), Missouri and Worst 20% (W20%) days in 2002. 

Bext Response (2018g2a - 2002gt2a) at MING1 on Worst 20% Days

-250

-200

-150

-100

-50

0

50

20 77 95 158 185 188 191 194 197 206 215 218 221 239 242 245 251 260 272 296 332 341 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-19f. Differences in modeled 2002 and 2018 Base G CMAQ 36 km results (2018-2002) daily 

extinction for Mingo (MING), Missouri and Worst 20% (W20%) days in 2002.
 E-59 

Uniform Rate of Progress Glide Path

Hercules - Glade - Worst 20% Days

26.75

25.46

23.13

20.55

17.96

15.38

12.80

11.24

24.58

23.09

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-20a. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Hercules Glade 

(HEGL), Missouri and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 12 km modeling 

results. 

Uniform Rate of Progress Glide Path

Hercules - Glade - Worst 20% Days (36 km)

26.75

25.72

23.13

20.55

17.96

15.38

12.80

11.24

23.24

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-20b. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Hercules Glade 

(HEGL), Missouri and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 36 km modeling 

results. 
 E-60 

Worst 20% Obs (left) vs 2002gt2a (right) at HEGL1

0

50

100

150

200

250

300

350

400

450

5 149 152 170 173 179 188 191 206 215 218 221 224 239 242 245 248 251 257 260 269 296 320 341 347 Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-20c. Comparison of observed (left) and 2002 Base G2 CMAQ 12 km modeled (right) daily 

extinction for Hercules Glade (HEGL), Missouri and Worst 20% (W20%) days in 2002. 

Worst 20% Obs (left) vs 2002gt2a (right) at HEGL1

0

50

100

150

200

250

300

350

400

5 149 152 170 173 179 188 191 206 215 218 221 224 239 242 245 248 251 257 260 269 296 320 341 347 Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-20d. Comparison of observed (left) and 2002 Base G2 CMAQ 36 km modeled (right) daily 

extinction for Hercules Glade (HEGL), Missouri and Worst 20% (W20%) days in 2002.
 E-61 

Bext Response (2018g2b - 2002gt2a) at HEGL1 on Worst 20% Days

-250

-200

-150

-100

-50

0

50

5 149 152 170 173 179 188 191 206 215 218 221 224 239 242 245 248 251 257 260 269 296 320 341 347 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-20e. Differences in modeled 2002 and 2018 Base G CMAQ 12 km results (2018-2002) daily 

extinction for Hercules Glade (HEGL), Missouri and Worst 20% (W20%) days in 2002. 

Bext Response (2018g2a - 2002gt2a) at HEGL1 on Worst 20% Days

-250

-200

-150

-100

-50

0

50

5 149 152 170 173 179 188 191 206 215 218 221 224 239 242 245 248 251 257 260 269 296 320 341 347 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-20f. Differences in modeled 2002 and 2018 Base G CMAQ 36 km results (2018-2002) daily 

extinction for Hercules Glade (HEGL), Missouri and Worst 20% (W20%) days in 2002.
 E-62 

Uniform Rate of Progress Glide Path

Brigantine - Worst 20% Days

29.01

27.59

25.05

22.23

19.40

16.58

13.76

12.06

26.07

24.62

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-21a. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Brigantine 

(BRIG), New Jersey and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 12 km 

modeling results. 

Uniform Rate of Progress Glide Path

Brigantine - Worst 20% Days (36 km)

29.01

27.88

25.05

22.23

19.40

16.58

13.76

12.06

24.37

0

5

10

15

20

25

30

35

2000 2004 2008 2012 2016 2020 2024 2028 2032 2036 2040 2044 2048 2052 2056 2060 2064

Year

Haziness Index (Deciviews)

Glide Path Natural Condition (Worst Days) Observation Method 1 Prediction

Figure E-21b. 2018 Visibility Projections and 2018 URP Glidepath in deciview for Brigantine 

(BRIG), New Jersey and Worst 20% (W20%) days using 2002/2018 Base G2 CMAQ 36 km 

modeling results. 
 E-63 

Worst 20% Obs (left) vs 2002gt2a (right) at BRIG1

0

100

200

300

400

500

600

700

800

20 74 107 122 137 149 152 170 176 179 185 188 191 197 209 224 230 275 278 329 341 362 _ _ _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-21c. Comparison of observed (left) and 2002 Base G2 CMAQ 12 km modeled (right) 

daily extinction for Brigantine (BRIG), New Jersey and Worst 20% (W20%) days in 2002. 

Worst 20% Obs (left) vs 2002gt2a (right) at BRIG1

0

100

200

300

400

500

600

700

800

20 74 107 122 137 149 152 170 176 179 185 188 191 197 209 224 230 275 278 329 341 362 _ _ _ Avg

Julian Day in Worst 20% group

bEXT (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-21d. Comparison of observed (left) and 2002 Base G2 CMAQ 36 km modeled (right) 

daily extinction for Brigantine (BRIG), New Jersey and Worst 20% (W20%) days in 2002.
 E-64 

Bext Response (2018g2b - 2002gt2a) at BRIG1 on Worst 20% Days

-250

-200

-150

-100

-50

0

50

20 74 107 122 137 149 152 170 176 179 185 188 191 197 209 224 230 275 278 329 341 362 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-21e. Differences in modeled 2002 and 2018 Base G CMAQ 12 km results (2018-

2002) daily extinction for Brigantine (BRIG), New Jersey and Worst 20% (W20%) days in 2002. 

Bext Response (2018g2a - 2002gt2a) at BRIG1 on Worst 20% Days

-250

-200

-150

-100

-50

0

50

20 74 107 122 137 149 152 170 176 179 185 188 191 197 209 224 230 275 278 329 341 362 Avg

Julian Day

Delta Bext (1/Mm)

bCM

bSOIL

bEC

bOC

bNO3

bSO4

Figure E-21f. Differences in modeled 2002 and 2018 Base G CMAQ 36 km results (2018-

2002) daily extinction for Brigantine (BRIG), New Jersey and Worst 20% (W20%) days in 2002.