Document 82kyN77RJMG5GxL14XON4odRK

BURNS 41cIDONNELL Mr. Criswell June 23, 2023 Page 8 Table 4: Summary of Capital, 0&M and Levelized Costs for EPA Estimate Method, 2022 Emission Baseline Summary of Particulate Emissions Control Costs from Colstrip PM Emissions Economic Impacts PM-10 Control Removal Alternative (Ranked by PM-10 Rate) Efficiency % (Note B) Upstream ESP . Upstream FF Wet ESP 54.55 . 54.55 54.55 Reheat ESP Reheat FF 2022 Baseline (Scrubber) 54.55 54.55 Emission Rate lb/MMBtu 0.010 . 0.010 0.010 0.010 0.010 0.022 Hourly Emission Lbs/Hr 152 . 152 152 152 152 334 Annual Emission Tons/yr 566 566 566 566 566 1245 Emission Reduction Tons/yr 679 679 679 679 679 Installed Capital Annual 0 &M Total Annual Cost in millions S 406 1 . 338.3 622 2 220.2 293 4 Cost in millions S 29 8 . 29.9 16 6 10.5 14 9 Cost millions/yr 78.0 70.1 90.4 36.6 49.7 N/A N/A N/A Average Control Cost $Iton 114,900 103,200 133,100 53,900 73,200 N/A Sierra Club FOIA 2025-EPA-04883 ED_018388_00000307-00039 SC_EVERSPLIT0006135