Scenario SO2 NOx PM Pre-control days >0.5Postcontrol days >0.5∆daysPrecontrol days >1.0Postcontrol days >1.0∆days pre-control Base case Base case - LNB Existing baghouse 63

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--- --- 1 Dry Scrubber Base case - LNB Existing baghouse 63 20 43 28 4 24 2 Dry Scrubber LNB/OFA Existing baghouse 63 20 43 28 4 24 3 Dry Scrubber SNCR Existing baghouse 63 20 43 28 4 24 4 Dry Scrubber LNB/OFA+SNCR Existing baghouse 63 11 52 28 3 25 5 Dry Scrubber SCR Existing baghouse 63 4 59 28 0 28 6 DSI BH Base case - LNB Existing baghouse 63 47 16 28 17 11 7 DSI BH LNB/OFA Existing baghouse 63 47 16 28 17 11 8 DSI BH SNCR Existing baghouse 63 46 17 28 14 14 9 DSI BH LNB/OFA+SNCR Existing baghouse 63 45 18 28 14 14 10 DSI BH SCR Existing baghouse 63 35 28 28 10 18 11 Wet ScrubberBase case - LNB Existing baghouse 63 14 49 28 3 25 12 Wet Scrubber LNB/OFA Existing baghouse 63 14 49 28 3 25 13 Wet Scrubber SNCR Existing baghouse 63 12 51 28 3 25 14 Wet ScrubberLNB/OFA+SNCR Existing baghouse 63 8 55 28 1 27 15 Wet Scrubber SCR Existing baghouse 63 0 63 28 0 28 16 PRB PRB Existing baghouse 63 NANA28 NANA 17 PRB LNB/OFA +PRB Existing baghouse 63 NANA28 NANA 18 DSI/ESP+PRB LNB/OFA +PRB Existing baghouse 63 NANA28 NANA 19 DSI/ESP+PRB LNB/OFA +PRB Existing baghouse 63 NANA28 NANA 20 Dry Scrubber+ PRBLNB/OFA +PRB Existing baghouse 63 NANA28 NANA 21 63 20 43 28 4 24 22 63 21 42 28 4 24 **Stanton Unit 1 - Days > 0.5 dv and >1.0 dv**

TRNP-South Unit Control Option 3-year totals 3-year totals

Scenario 2 + Best PM Controls Scenario 2 + Permit Limit PM

Page 1 of 4**Stanton Unit 1 - Days > 0.5 dv and >1.0 dv**

Scenario SO2 NOx PM Pre-control days >0.5Postcontrol days >0.5∆daysPrecontrol days >1.0Postcontrol days >1.0∆days pre-control Base case Base case - LNB Existing baghouse 61

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--- --- 1 Dry Scrubber Base case - LNB Existing baghouse 61 21 40 28 4 24 2 Dry Scrubber LNB/OFA Existing baghouse 61 20 41 28 4 24 3 Dry Scrubber SNCR Existing baghouse 61 18 43 28 4 24 4 Dry Scrubber LNB/OFA+SNCR Existing baghouse 61 14 47 28 3 25 5 Dry Scrubber SCR Existing baghouse 61 3 58 28 0 28 6 DSI BH Base case - LNB Existing baghouse 61 50 11 28 17 11 7 DSI BH LNB/OFA Existing baghouse 61 50 11 28 17 11 8 DSI BH SNCR Existing baghouse 61 50 11 28 16 12 9 DSI BH LNB/OFA+SNCR Existing baghouse 61 47 14 28 16 12 10 DSI BH SCR Existing baghouse 61 38 23 28 9 19 11 Wet ScrubberBase case - LNB Existing baghouse 61 18 43 28 3 25 12 Wet Scrubber LNB/OFA Existing baghouse 61 17 44 28 3 25 13 Wet Scrubber SNCR Existing baghouse 61 16 45 28 3 25 14 Wet ScrubberLNB/OFA+SNCR Existing baghouse 61 9 52 28 1 27 15 Wet Scrubber SCR Existing baghouse 61 1 60 28 0 28 16 PRB PRB Existing baghouse 61 NANA28 NANA 17 PRB LNB/OFA +PRB Existing baghouse 61 NANA28 NANA 18 DSI/ESP+PRB LNB/OFA +PRB Existing baghouse 61 NANA28 NANA 19 DSI/ESP+PRB LNB/OFA +PRB Existing baghouse 61 NANA28 NANA 20 Dry Scrubber+ PRBLNB/OFA +PRB Existing baghouse 61 NANA28 NANA 21 61 20 41 4 4 0 22 61 21 40 4 4 0 Scenario 2 + Best PM Controls Scenario 2 + Permit Limit PMTRNP-North Unit Control Option 3-year totals 3-year totals

Page 2 of 4**Stanton Unit 1 - Days > 0.5 dv and >1.0 dv**

Scenario SO2 NOx PM Pre-control days >0.5Postcontrol days >0.5∆daysPrecontrol days >1.0Postcontrol days >1.0∆days pre-control Base case Base case - LNB Existing baghouse 63

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--- --- 1 Dry Scrubber Base case - LNB Existing baghouse 63 12 51 28 3 25 2 Dry Scrubber LNB/OFA Existing baghouse 63 12 51 28 3 25 3 Dry Scrubber SNCR Existing baghouse 63 11 52 28 3 25 4 Dry Scrubber LNB/OFA+SNCR Existing baghouse 63 9 54 28 3 25 5 Dry Scrubber SCR Existing baghouse 63 3 60 28 0 28 6 DSI BH Base case - LNB Existing baghouse 63 31 32 28 14 14 7 DSI BH LNB/OFA Existing baghouse 63 31 32 28 14 14 8 DSI BH SNCR Existing baghouse 63 31 32 28 14 14 9 DSI BH LNB/OFA+SNCR Existing baghouse 63 30 33 28 13 15 10 DSI BH SCR Existing baghouse 63 24 39 28 10 18 11 Wet ScrubberBase case - LNB Existing baghouse 63 9 54 28 3 25 12 Wet Scrubber LNB/OFA Existing baghouse 63 9 54 28 3 25 13 Wet Scrubber SNCR Existing baghouse 63 9 54 28 2 26 14 Wet ScrubberLNB/OFA+SNCR Existing baghouse 63 4 59 28 2 26 15 Wet Scrubber SCR Existing baghouse 63 0 63 28 0 28 16 PRB PRB Existing baghouse 63 NANA28 NANA 17 PRB LNB/OFA +PRB Existing baghouse 63 NANA28 NANA 18 DSI/ESP+PRB LNB/OFA +PRB Existing baghouse 63 NANA28 NANA 19 DSI/ESP+PRB LNB/OFA +PRB Existing baghouse 63 NANA28 NANA 20 Dry Scrubber+ PRBLNB/OFA +PRB Existing baghouse 63 NANA28 NANA 21 63 12 51 28 3 25 22 63 13 50 28 3 25 TRNP-Elkhorn Ranch Control Option 3-year totals 3-year totals

Scenario 2 + Best PM Controls Scenario 2 + Permit Limit PM

Page 3 of 4**Stanton Unit 1 - Days > 0.5 dv and >1.0 dv**

Scenario SO2 NOx PM Pre-control days >0.5Postcontrol days >0.5∆daysPrecontrol days >1.0Postcontrol days >1.0∆days pre-control Base case Base case - LNB Existing baghouse 68

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--- --- 1 Dry Scrubber Base case - LNB Existing baghouse 68 17 51 24 3 21 2 Dry Scrubber LNB/OFA Existing baghouse 68 17 56 24 3 21 3 Dry Scrubber SNCR Existing baghouse 68 17 51 24 3 21 4 Dry Scrubber LNB/OFA+SNCR Existing baghouse 68 14 54 24 3 21 5 Dry Scrubber SCR Existing baghouse 68 3 65 24 0 24 6 DSI BH Base case - LNB Existing baghouse 68 59 9 24 17 7 7 DSI BH LNB/OFA Existing baghouse 68 59 9 24 17 7 8 DSI BH SNCR Existing baghouse 68 59 9 24 17 7 9 DSI BH LNB/OFA+SNCR Existing baghouse 68 55 13 24 14 10 10 DSI BH SCR Existing baghouse 68 46 22 24 10 14 11 Wet ScrubberBase case - LNB Existing baghouse 68 14 54 24 3 21 12 Wet Scrubber LNB/OFA Existing baghouse 68 14 54 24 3 21 13 Wet Scrubber SNCR Existing baghouse 68 13 55 24 3 21 14 Wet ScrubberLNB/OFA+SNCR Existing baghouse 68 11 57 24 3 21 15 Wet Scrubber SCR Existing baghouse 68 1 67 24 0 24 16 PRB PRB Existing baghouse 68 NANA24 NANA 17 PRB LNB/OFA +PRB Existing baghouse 68 NANA24 NANA 18 DSI/ESP+PRB LNB/OFA +PRB Existing baghouse 68 NANA24 NANA 19 DSI/ESP+PRB LNB/OFA +PRB Existing baghouse 68 NANA24 NANA 20 Dry Scrubber+ PRBLNB/OFA +PRB Existing baghouse 68 NANA24 NANA 21 68 17 51 24 3 21 22 68 17 51 24 3 21
Note: Scenarios 16-20, reflecting use of PRB coal, were not modeled. Scenario 2 + Best PM Controls Scenario 2 + Permit Limit PMTRNP-Lostwood NWA Control Option 3-year totals 3-year totals

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