Document ba6D0jqLM2RXOkGDe6DngndgZ

BURNS 41cIDONNELL Mr. Criswell June 23, 2023 Page 7 Table 3: Summary of Capital, O&M and Leyelized Costs for Class 5 Estimate Method, EPA 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 48.72 . 48.72 48.72 Reheat ESP Reheat FF 2022 Baseline (Scrubber) 48.72 48.72 Emission Rate lb/MMBtu 0.010 . 0.010 0.010 0.010 0.010 0.0195 Hourly Emission Lbs/Hr 152 . 152 152 152 152 296 Annual Emission Tons/yr 566 566 566 566 566 1103 Emission Reduction Tons/yr 538 538 538 538 538 Installed Capital Annual 0 &M Total Annual Cost in millions $ 486 0 . 404.9 744 5 263.5 351 2 Cost in millions $ 29 8 . 29.9 16 6 10.5 14 9 Cost millions/yr 87.4 78.0 104 9 41.8 56.5 N/A N/A N/A Average Control Cost $Iton 162,500 145,000 195,000 77,700 105,000 N/A Sierra Club FOIA 2025-EPA-04883 ED_018388_00000307-00038 SC_EVERSPLIT0006134