Document k6Ej0v45kmned0N725kpM8dVJ

BURNS 41cIDONNELL Mr. Criswell June 23, 2023 Page 9 Table 5: Summary of Capital, O&M and Levelized Costs for EPA Estimate Method, EPA Emission Baseline Summary of Particulate Emissions Control Costs from Colstrip PM PM-10 Control Removal Alternative (Ranked by PM-10 Rate) Efficiency % (Note B) Upstream ESP . Upstream FF Wet ESP Reheat ESP Reheat FF 2022 Baseline (Scrubber) 48 72 . 48.72 48 72 48.72 48 72 Emission Rate lb/MMBtu 0 010 0.010 0 010 0.010 0 010 0.0195 Emissions Hourly Annual Emission Emission Lbs/Hr 152 152 152 152 152 Emission Reduction Tons/yr Tons/yr 566 . 538 566 538 566 538 566 538 566 538 296 1103 Installed Capital Economic Impacts 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 145,000 130,300 168,000 68,000 92,400 N/A Sierra Club FOIA 2025-EPA-04883 ED_018388_00000307-00040 SC_EVERSPLIT0006136