Table 2.a.. SO2 Rankings (24-hr averaging period)

SO2 Issue/Op Coal Quality Capacity Emissions or Limits* Period Control

Facility Name Status Permit # Date %S (Btu/lb) (lb/mmBtu) MW Total (mmBtu/hr) (lb/mmBtu) (lb/hr) (lb/MW) (hr) Type (%)

Boardman (actual coal) BART OR 0.36 8316 0.758 617 617 5793 24 SDFGD

Newmont Nevada issued NV-0036 5/5/2005 0.45 8400 0.938 200 200 2030 0.065 132 0.66 24 SDFGD 93.1%

LS Power-White Pine draft permit NV 0.3 8200 0.640 3x530 1590 15648 0.065 1017 0.64 24 SDFGD 89.8%

Basin Electric--Dry Fork permit WY 10/15/07 0.47 7800 1.054 385 385 3801 0.100 380 0.99 24 SDFGD 90.5%

LS Power-White Pine draft permit NV 0.66 8200 1.409 3x530 1590 15648 0.089 1386 0.87 24 SDFGD 93.7%

Sierra Pacific-Ely draft permit NV 0.8 8100 1.728 2x750 1500 17420 0.060 1045 0.70 24 SDFGD 96.5%

Black Hills Pwr-WYGEN 2 issued WY 7/11/2005 1.20 7950 2.642 100 1300 0.120 156 1.56 24 SDFGD 95.5%

Black Hills Pwr-WYGEN 3 issued WY 2/5/2007 1.20 7950 2.642 100 1300 0.120 156 1.56 24 SDFGD 95.5%

* Actual emissions from existing sources or proposed or permited limits for new sources

Table 2.b. SO2 Rankings (30-day averaging period)

SO2 Issue/Op Coal Quality Capacity Emissions or Limits* Period Control

Facility Name Status Permit # Date %S (Btu/lb) (lb/mmBtu) MW Total (mmBtu/hr) (lb/mmBtu) (lb/hr) (lb/MW) (hr) Type (%)

LS Power-White Pine draft permit NV 0.3 8200 0.640 3x530 1590 15648 0.065 1017 0.64 720 SDFGD 89.8%

Boardman (actual coal) BART OR 0.36 8,316 0.758 617 617 5793 720 SDFGD

Newmont Nevada issued NV-0036 5/5/2005 0.45 8400 0.938 200 200 2030 0.065 132 0.66 720 SDFGD 93.1%

Basin Electric--Dry Fork permit WY 10/15/07 0.47 7800 1.054 385 385 3801 0.075 285 0.74 720 SDFGD 92.9%

LS Power-White Pine draft permit NV 0.66 8200 1.409 3x530 1590 15648 0.089 1386 0.87 720 SDFGD 93.7%

Sierra Pacific-Ely draft permit NV 0.8 8100 1.728 2x750 1500 17420 0.060 1045 0.70 720 SDFGD 96.5%

Boardman (ODEQ proposal) BART OR 1.0 8020 2.182 617 617 5793 0.120 695 1.127 720 SDFGD 94.5%

Black Hills Pwr-WYGEN 2 issued WY 7/11/2005 1.20 7950 2.642 100 1300 0.100 130 1.30 720 SDFGD 96.2%

Black Hills Pwr-WYGEN 3 issued WY 2/5/2007 1.20 7950 2.642 100 1300 0.090 117 1.17 720 SDFGD 96.6%

Duke--Cliffside issued NC 1/29/2008 3 9376 5.599 800 7850 0.120 942 1.18 720 SDFGD 97.9%

* Actual emissions from existing sources or proposed or permited limits for new sources

Table 2.c. SO2 Rankings (Annual averaging period)

SO2 Issue/Op Coal Quality Capacity Emissions or Limits* Period Control

Facility Name Status Permit # Date %S (Btu/lb) (lb/mmBtu) MW Total (mmBtu/hr) (lb/mmBtu) (lb/hr) (lb/MW) (hr) Type (%)

Boardman (actual coal) BART OR 0.36 8316 0.600 617 617 5793 8760 SDFGD

LS Power-White Pine draft permit NV 0.3 8200 0.640 3x530 1590 15648 0.065 1017 0.64 8760 SDFGD 89.8%

Newmont Nevada issued NV-0036 5/5/2005 0.45 8400 0.938 200 200 2030 0.065 132 0.66 8760 SDFGD 93.1%

Basin Electric--Dry Fork permit WY 10/15/07 0.47 7800 1.054 385 385 3801 0.070 266 0.69 8760 SDFGD 93.4%

LS Power-White Pine draft permit NV 0.66 8200 1.409 3x530 1590 15648 0.089 1386 0.87 8760 SDFGD 93.7%

Sierra Pacific-Ely draft permit NV 0.8 8100 1.728 2x750 1500 17420 0.060 1045 0.70 8760 SDFGD 96.5%

Black Hills Pwr-WYGEN 2 issued WY 7/11/2005 1.20 7950 2.642 100 1300 0.100 130 1.30 8760 SDFGD 96.2%

Black Hills Pwr-WYGEN 3 issued WY 2/5/2007 1.20 7950 2.642 100 1300 0.090 117 1.17 8760 SDFGD 96.6%

Duke--Cliffside issued NC 1/29/2008 3 9376 5.599 800 7850 0.120 942 1.18 8760 SDFGD 97.9%

* Actual emissions from existing sources or proposed or permited limits for new sources