Scenario SO2 NOx PM Pre-control days >0.5 Postcontrol days >0.5∆days Precontrol days >1.0 Postcontrol days >1.0∆days PrecontrolExisting Wet Scrubber Existing SOFA/LNB Existing ESP 83

--- --- 45
--- --- 1 Scrubber ModificationsSOFA/LNB #2Existing ESP 83 37 46 45 10 35 2 Scrubber ModificationsSOFA/LNB #1Existing ESP 83 34 49 45 10 35 3 Scrubber Modifications SNCR Existing ESP 83 33 50 45 10 35 4 Scrubber Modifications SCR Existing ESP 83 21 62 45 5 40 5 Scrubber Modifications LTO Existing ESP 83 19 64 45 3 42 6 New Scrubber SOFA/LNB #2Existing ESP 83 20 63 45 5 40 7 New Scrubber SOFA/LNB #1Existing ESP 83 15 68 45 3 42 8 New Scrubber SNCR Existing ESP 83 14 69 45 1 44 9 New Scrubber SCR Existing ESP 83 7 76 45 0 45 10 New Scrubber LTO Existing ESP 83 4 79 45 0 45 **Coal Creek 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**Coal Creek 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 PrecontrolExisting Wet Scrubber Existing SOFA/LNB Existing ESP 78

--- --- 38

--- --- 1 Scrubber ModificationsSOFA/LNB #2Existing ESP 78 31 47 38 10 28 2 Scrubber ModificationsSOFA/LNB #1Existing ESP 78 29 49 38 9 29 3 Scrubber Modifications SNCR Existing ESP 78 26 52 38 8 30 4 Scrubber Modifications SCR Existing ESP 78 22 56 38 4 34 5 Scrubber Modifications LTO Existing ESP 78 17 61 38 3 35 6 New Scrubber SOFA/LNB #2Existing ESP 78 19 59 38 4 34 7 New Scrubber SOFA/LNB #1Existing ESP 78 16 62 38 2 36 8 New Scrubber SNCR Existing ESP 78 14 64 38 1 37 9 New Scrubber SCR Existing ESP 78 5 73 38 1 37 10 New Scrubber LTO Existing ESP 78 3 75 38 0 38 TRNP-North Unit Control Option 3-year totals 3-year totals

Page 2 of 4**Coal Creek 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 PrecontrolExisting Wet Scrubber Existing SOFA/LNB Existing ESP 57
--- --- 26

--- --- 1 Scrubber ModificationsSOFA/LNB #2Existing ESP 57 22 35 26 8 18 2 Scrubber ModificationsSOFA/LNB #1Existing ESP 57 20 37 26 7 19 3 Scrubber Modifications SNCR Existing ESP 57 17 40 26 6 20 4 Scrubber Modifications SCR Existing ESP 57 12 45 26 2 24 5 Scrubber Modifications LTO Existing ESP 57 10 47 26 1 25 6 New Scrubber SOFA/LNB #2Existing ESP 57 12 45 26 3 23 7 New Scrubber SOFA/LNB #1Existing ESP 57 10 47 26 3 23 8 New Scrubber SNCR Existing ESP 57 8 49 26 1 25 9 New Scrubber SCR Existing ESP 57 5 52 26 0 26 10 New Scrubber LTO Existing ESP 57 2 55 26 0 26 TRNP-Elkhorn Ranch Control Option 3-year totals 3-year totals

Page 3 of 4**Coal Creek 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 PrecontrolExisting Wet Scrubber Existing SOFA/LNB Existing ESP 109

--- --- 56

--- --- 1 Scrubber ModificationsSOFA/LNB #2Existing ESP 109 41 68 56 11 45 2 Scrubber ModificationsSOFA/LNB #1Existing ESP 109 38 71 56 11 45 3 Scrubber Modifications SNCR Existing ESP 109 32 77 56 11 45 4 Scrubber Modifications SCR Existing ESP 109 27 82 56 8 48 5 Scrubber Modifications LTO Existing ESP 109 24 85 56 8 48 6 New Scrubber SOFA/LNB #2Existing ESP 109 24 85 56 8 48 7 New Scrubber SOFA/LNB #1Existing ESP 109 19 90 56 7 49 8 New Scrubber SNCR Existing ESP 109 10 99 56 4 52 9 New Scrubber SCR Existing ESP 109 7 102 56 1 55 10 New Scrubber LTO Existing ESP 109 5 104 56 0 56 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 PrecontrolExisting Wet Scrubber Existing SOFA/LNBExisting ESP 83

--- --- 45
--- --- 1 Scrubber ModificationsSOFA/LNB #2Existing ESP 83 37 46 45 10 35 2 Scrubber ModificationsSOFA/LNB #1Existing ESP 83 34 49 45 10 35 3 Scrubber Modifications SNCR Existing ESP 83 33 50 45 10 35 4 Scrubber Modifications SCR Existing ESP 83 21 62 45 5 40 5 Scrubber Modifications LTO Existing ESP 83 19 64 45 3 42 6 New Scrubber SOFA/LNB #2Existing ESP 83 20 63 45 5 40 7 New Scrubber SOFA/LNB #1Existing ESP 83 15 68 45 3 42 8 New Scrubber SNCR Existing ESP 83 14 69 45 1 44 9 New Scrubber SCR Existing ESP 83 7 76 45 0 45 10 New Scrubber LTO Existing ESP 83 4 79 45 0 45 TRNP-South Unit **Coal Creek Unit 2 - Days > 0.5 dv and >1.0 dv** Control Option 3-year totals 3-year totals

Page 1 of 4

### Coal Creek 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 PrecontrolExisting Wet Scrubber Existing SOFA/LNBExisting ESP 78

--- --- 38

--- --- 1 Scrubber ModificationsSOFA/LNB #2Existing ESP 78 31 47 38 10 28 2 Scrubber ModificationsSOFA/LNB #1Existing ESP 78 29 49 38 9 29 3 Scrubber Modifications SNCR Existing ESP 78 26 52 38 8 30 4 Scrubber Modifications SCR Existing ESP 78 22 56 38 4 34 5 Scrubber Modifications LTO Existing ESP 78 17 61 38 3 35 6 New Scrubber SOFA/LNB #2Existing ESP 78 19 59 38 4 34 7 New Scrubber SOFA/LNB #1Existing ESP 78 16 62 38 2 36 8 New Scrubber SNCR Existing ESP 78 14 64 38 1 37 9 New Scrubber SCR Existing ESP 78 5 73 38 1 37 10 New Scrubber LTO Existing ESP 78 3 75 38 0 38 Control Option 3-year totals 3-year totals TRNP-North Unit

Page 2 of 4

### Coal Creek 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 PrecontrolExisting Wet Scrubber Existing SOFA/LNBExisting ESP 57
--- --- 26

--- --- 1 Scrubber ModificationsSOFA/LNB #2Existing ESP 57 22 35 26 8 18 2 Scrubber ModificationsSOFA/LNB #1Existing ESP 57 20 37 26 7 19 3 Scrubber Modifications SNCR Existing ESP 57 17 40 26 6 20 4 Scrubber Modifications SCR Existing ESP 57 12 45 26 2 24 5 Scrubber Modifications LTO Existing ESP 57 10 47 26 1 25 6 New Scrubber SOFA/LNB #2Existing ESP 57 12 45 26 3 23 7 New Scrubber SOFA/LNB #1Existing ESP 57 10 47 26 3 23 8 New Scrubber SNCR Existing ESP 57 8 49 26 1 25 9 New Scrubber SCR Existing ESP 57 5 52 26 0 26 10 New Scrubber LTO Existing ESP 57 2 55 26 0 26 3-year totals 3-year totals TRNP-Elkhorn Ranch Control Option

Page 3 of 4

### Coal Creek 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 PrecontrolExisting Wet Scrubber Existing Existing ESP 109

--- --- 56

--- --- 1 Scrubber ModificationsSOFA/LNB #2Existing ESP 109 41 68 56 11 45 2 Scrubber ModificationsSOFA/LNB #1Existing ESP 109 38 71 56 11 45 3 Scrubber Modifications SNCR Existing ESP 109 32 77 56 11 45 4 Scrubber Modifications SCR Existing ESP 109 27 82 56 8 48 5 Scrubber Modifications LTO Existing ESP 109 24 85 56 8 48 6 New Scrubber SOFA/LNB #2Existing ESP 109 24 85 56 8 48 7 New Scrubber SOFA/LNB #1Existing ESP 109 19 90 56 7 49 8 New Scrubber SNCR Existing ESP 109 10 99 56 4 52 9 New Scrubber SCR Existing ESP 109 7 102 56 1 55 10 New Scrubber LTO Existing ESP 109 5 104 56 0 56 Control Option 3-year totals 3-year totals Lostwood NWA

Page 4 of 4