Scenario SO2 NOx PM

Pre-control 

days >0.5

Postcontrol 

days >0.5 ∆days

Precontrol 

days >1.0

Postcontrol 

days >1.0 ∆days

Precontrol No control No control Existing ESP 116 --- --- 60 --- ---

Run 1 No control ASOFA+SNCR Existing ESP 116 78 38 60 39 21

Run 2A FGD at 90% No control Existing ESP 116 54 62 60 27 33

Run 2B FGD at 95% No control Existing ESP 116 45 71 60 21 39

Run 3A No control No control CD Rate w/ dry FGD 116 96 20 60 45 15

Run 3B No control No control CD Rate w/ wet FGD 116 96 20 60 45 15

Run 4 FGD at 90% ASOFA+SNCR CD Rate w/ wet FGD 116 20 96 60 7 53

ND Run 1 FGD at 95% ASOFA+SCR CD Rate w/ wet FGD 116 2 114 60 0 60

Milton R. Young Unit 1 - Days > 0.5 dv and >1.0 dv

TRNP-South Unit

Control Option 3-year totals 3-year totals

Page 1 of 4
Milton R. Young Unit 1 - Days > 0.5 dv and >1.0 dv

Scenario SO2 NOx PM

Pre-control 

days >0.5

Postcontrol 

days >0.5 ∆days

Precontrol 

days >1.0

Postcontrol 

days >1.0 ∆days

Precontrol No control No control Existing ESP 124 --- --- 64 --- ---

Run 1 No control ASOFA+SNCR Existing ESP 124 93 31 64 42 22

Run 2A FGD at 90% No control Existing ESP 124 69 55 64 32 32

Run 2B FGD at 95% No control Existing ESP 124 50 74 64 23 41

Run 3A No control No control CD Rate w/ dry FGD 124 104 20 64 55 9

Run 3B No control No control CD Rate w/ wet FGD 124 104 20 64 55 9

Run 4 FGD at 90% ASOFA+SNCR CD Rate w/ wet FGD 124 20 104 64 6 58

ND Run 1 FGD at 95% ASOFA+SCR CD Rate w/ wet FGD 124 2 122 64 0 64

TRNP-North Unit

Control Option 3-year totals 3-year totals

Page 2 of 4
Milton R. Young Unit 1 - Days > 0.5 dv and >1.0 dv

Scenario SO2 NOx PM

Pre-control 

days >0.5

Postcontrol 

days >0.5 ∆days

Precontrol 

days >1.0

Postcontrol 

days >1.0 ∆days

Precontrol No control No control Existing ESP 84 --- --- 48 --- ---

Run 1 No control ASOFA+SNCR Existing ESP 84 65 19 48 31 17

Run 2A FGD at 90% No control Existing ESP 84 47 37 48 21 27

Run 2B FGD at 95% No control Existing ESP 84 32 52 48 21 27

Run 3A No control No control CD Rate w/ dry FGD 84 77 7 48 38 10

Run 3B No control No control CD Rate w/ wet FGD 84 77 7 48 38 10

Run 4 FGD at 90% ASOFA+SNCR CD Rate w/ wet FGD 84 12 72 48 5 43

ND Run 1 FGD at 95% ASOFA+SCR CD Rate w/ wet FGD 84 1 83 48 0 48

TRNP-Elkhorn Ranch

Control Option 3-year totals 3-year totals

Page 3 of 4
Milton R. Young Unit 1 - Days > 0.5 dv and >1.0 dv

Scenario SO2 NOx PM

Pre-control 

days >0.5

Postcontrol 

days >0.5 ∆days

Precontrol 

days >1.0

Postcontrol 

days >1.0 ∆days

Precontrol No control No control Existing ESP 151 --- --- 80 --- ---

Run 1 No control ASOFA+SNCR Existing ESP 151 107 44 80 56 24

Run 2A FGD at 90% No control Existing ESP 151 70 81 80 26 54

Run 2B FGD at 95% No control Existing ESP 151 56 95 80 18 62

Run 3A No control No control CD Rate w/ dry FGD 151 127 24 80 69 11

Run 3B No control No control CD Rate w/ wet FGD 151 127 24 80 69 11

Run 4 FGD at 90% ASOFA+SNCR CD Rate w/ wet FGD 151 15 136 80 5 75

ND Run 1 FGD at 95% ASOFA+SCR CD Rate w/ wet FGD 151 3 148 80 0 80

Lostwood NWA

Control Option 3-year totals 3-year totals

Page 4 of 4
Scenario SO2 NOx PM

Pre-control 

days >0.5

Postcontrol 

days >0.5 ∆days

Precontrol 

days >1.0

Postcontrol 

days >1.0 ∆days

Precontrol Existing Wet Scrubber No control Existing ESP/Wet Scrubber 120 --- --- 59 --- ---

Run 1 Existing Wet Scrubber ASOFA+SNCR Existing ESP/Wet Scrubber 120 86 34 59 43 16

Run 2A FGD at 90% No control Existing ESP/Wet Scrubber 120 80 40 59 42 17

Run 2B FGD at 95% No control Existing ESP/Wet Scrubber 120 68 52 59 38 21

Run 3 Existing Wet Scrubber No control CD Rate 120 118 2 59 56 3

Run 4 FGD at 90% ASOFA+SNCR CD Rate 120 40 80 59 18 41

ND Run 1 FGD at 95% ASOFA+SNCR CD Rate 120 31 89 59 11 48

ND Run 2 FGD at 95% ASOFA+SCR CD Rate 120 10 110 59 2 57

TRNP-South Unit

Milton R. Young Unit 2 - Days > 0.5 dv and >1.0 dv

Control Option 3-year totals 3-year totals

Page 1 of 4
Milton R. Young Unit 2 - Days > 0.5 dv and >1.0 dv

Scenario SO2 NOx PM

Pre-control 

days >0.5

Postcontrol 

days >0.5 ∆days

Precontrol 

days >1.0

Postcontrol 

days >1.0 ∆days

Precontrol Existing Wet Scrubber No control Existing ESP/Wet Scrubber 122 --- --- 68 --- ---

Run 1 Existing Wet Scrubber ASOFA+SNCR Existing ESP/Wet Scrubber 122 96 26 68 45 23

Run 2A FGD at 90% No control Existing ESP/Wet Scrubber 122 89 33 68 49 19

Run 2B FGD at 95% No control Existing ESP/Wet Scrubber 122 74 48 68 44 24

Run 3 Existing Wet Scrubber No control CD Rate 122 111 11 68 68 0

Run 4 FGD at 90% ASOFA+SNCR CD Rate 122 50 72 68 18 50

ND Run 1 FGD at 95% ASOFA+SNCR CD Rate 122 33 89 68 13 55

ND Run 2 FGD at 95% ASOFA+SCR CD Rate 122 8 114 68 2 66

TRNP-North Unit

Control Option 3-year totals 3-year totals

Page 2 of 4
Milton R. Young Unit 2 - Days > 0.5 dv and >1.0 dv

Scenario SO2 NOx PM

Pre-control 

days >0.5

Postcontrol 

days >0.5 ∆days

Precontrol 

days >1.0

Postcontrol 

days >1.0 ∆days

Precontrol Existing Wet Scrubber No control Existing ESP/Wet Scrubber 90 --- --- 45 --- ---

Run 1 Existing Wet Scrubber ASOFA+SNCR Existing ESP/Wet Scrubber 90 73 17 45 34 11

Run 2A FGD at 90% No control Existing ESP/Wet Scrubber 90 57 33 45 34 11

Run 2B FGD at 95% No control Existing ESP/Wet Scrubber 90 46 44 45 27 18

Run 3 Existing Wet Scrubber No control CD Rate 90 88 2 45 43 2

Run 4 FGD at 90% ASOFA+SNCR CD Rate 90 32 58 45 12 33

ND Run 1 FGD at 95% ASOFA+SNCR CD Rate 90 27 63 45 9 36

ND Run 2 FGD at 95% ASOFA+SCR CD Rate 90 8 82 45 1 44

TRNP-Elkhorn Ranch

Control Option 3-year totals 3-year totals

Page 3 of 4
Milton R. Young Unit 2 - Days > 0.5 dv and >1.0 dv

Scenario SO2 NOx PM

Pre-control 

days >0.5

Postcontrol 

days >0.5 ∆days

Precontrol 

days >1.0

Postcontrol 

days >1.0 ∆days

Precontrol Existing Wet Scrubber No control Existing ESP/Wet Scrubber 151 --- --- 86 --- ---

Run 1 Existing Wet Scrubber ASOFA+SNCR Existing ESP/Wet Scrubber 151 114 37 86 61 25

Run 2A FGD at 90% No control Existing ESP/Wet Scrubber 151 105 46 86 52 34

Run 2B FGD at 95% No control Existing ESP/Wet Scrubber 151 92 59 86 44 42

Run 3 Existing Wet Scrubber No control CD Rate 151 143 8 86 79 7

Run 4 FGD at 90% ASOFA+SNCR CD Rate 151 57 94 86 11 75

ND Run 1 FGD at 95% ASOFA+SNCR CD Rate 151 37 114 86 8 78

ND Run 2 FGD at 95% ASOFA+SCR CD Rate 151 6 145 86 0 86

Control Option 3-year totals 3-year totals

Lostwood NWA

Page 4 of 4