Document wr62998DXJ2ZywkNjDQYGvVb3

meet a 90% removal rate on lignite. Note the table does not include or account for any costs associated with MRY 1 mercury system upgrades. Example MRY Unit 2 Cost Underestimations Summary Table 3-1 Parameter EPA Example Hypothetical ROO MW EPA Assumed MRY U2 Costs 447 MM.' Est. Actual N1RY U2 Costs 447 MW Current Hg Compliance (4.0 lb IlIfitu) Cost l Current llg RemoNcd Current C I' (i-i per lb Ili Removed) ..2.6 M 1,295 lb 2,004 >i0.3 M 77 lb 3,845 51.9 M 149 lb 12,754 I ig Control System Annualized Capital Cost BPA(' Cot i1a- 5 lb NI Macf AI-Prove Cost Not included $7.5 M Not included Not included >i0.6 Al >i0.2 Al >i472k : 51.3 Al ' SI .6 N1 -1 Future lie. Compliance ((al 5 lb MIMacr) Cost $7.5 1M >i0.8 Al 53.4 AI Future I Et Removed (EPA Assumed I:, 1.2 lb: TRW) I- uture C F: (S per lb I ig Removed) 1,447 lb ' 5.083 110 lb 7,040 21( lb 15,678 Incremental C I' (i-i per lb lie. Removed) 28.176 14.360 22,217 Note. 1 - EPA example only based on ,orbent. EPA assumed current compliance cost includes ,orlient and chemical fuel additive. actual cot based on 2023 \IRV Unit 2 tu,ag.e. rate. & pricing for both ,orlient and chemical additive. Note 2 Cost of $5.0 million dollars from S&I.proiect database was annualized using a capital rccoN cry thctor calculated based on annual interest rate of 796 (pre-tax marginal rate of return on prt ate in esnnent, EPA Cost Manual Section 5 ilui 20 year cx ablation period (EPA Cost Manual Section 6). Note 3 Cost haled on EPA assumed rate but using 2023 \IRV 1-31' At' pricing. Note. 4 Cost haled on 2023 AIRY Unit 2 usage rate Sc. pricing instead of tiuming same as sorhent cosu. Note 5 Based on calculated value for EPA example inlet llg of 1.542 lbs (current II 2 coal content) 95 lbs (tiuure enured amount). However, the EPA example identdies 1.4f8 lb for the incremental cost elfectiN mess calculatton. 43. Costs to comply with the New Mercury Limitation are exorbitant and damage Minnkota. Many costs may be passed along to its member cooperatives and end users who are harmed via higher electricity -22- Sierra Club FOIA 2025-EPA-04883 ED_018388_00000327-00074 SC_EVERSPLIT0006383