Document 82YxQ6GZ6E2D5MNmy7MMY1wey
TALEN
III
MONTANA
ATTACHI'IEVT B
The following table summarizes how the cost effectiveness of installing a new baghousc at Colstrip was calculated using EPA's post-IRA IPM model. The table was prepared by Trinity Consultants, which Talcn Montana retained for the purposes of preparing comments on the Proposed Rule.
Scenario
EPA Proposed Emission Reductions (Baseload Operation) Emission Reductions Using 2040 Base Case Emission Reductions Using 2050 Base Case
Unit
3 4
Total
3 4 Total 3 4 Total
Colstrip New Baghouse Cost Effectiveness
Heat Input (MMBtu/yr)
55,255,556
Current FPM
Emission Factor
(IbfMMBtu)
FPM Emissions
(WY)
0.018
497.3
% Reduction
in FPM without Proposed
Rule
New Baghouse
Cost ($/yr)
18,992,866
FPM Emission
. Factor with
New Baghouse (lb/MMBtu)
0.0020
55,904,762
I I 111,160,317 I
I 42,374,312
0.021 0.018
587.0 1084.3
381.4
19,058,306
r
I 38,051,172 I
I 18,992,866
0.0021 0.0020
42,925,688
0.021
450.7
19,058,306
0.0021
85,300,000 I
832.1
23% 38,051,172 I
6,557,338
0.018
59.0
18,992,866
0.0020
6,642,662
0.021
69.7 1
19,058,306
0.0021
13,200,000 1
128.8
88% 1 38,051,172 I
FPM Emissions
. with New Bag house
(tPY)
54.7
58.7
FPM Emissions Reduction from New Baghouse
UN)
442.6
528.3
New Baghouse
Cost Effectiveness
($/ton)
42,912
36,075
113.4
970.9
39,192
42.0 45.07 87.0
6.5 6.97 13.5
339.4 405.6 745.1 52.5 62.8 1 115.3 1
55,957 46,982 51,071 361,602 303,606 330,026
Scenarios. The scenarios presented for calculating the cost effectiveness of installing a baghousc at Colstrip arc: (i) based on the utilization and heat input predicted ITA's post-IRA IPM model From present to 2050;s4 (ii) based on UA's "baseline" For Colstrip, which represents the 99:h pm-cc/ink of the lowest
Final Version of the RIA [Regulatory Impact Analysis] for the Proposed I-.G1.5 MATS RTR, I)oc II). EPA -I IQ-OAR-2018-0794-5837; Post-IRA 2022 Reference Case, httris:',www.eria.govipower-sector-modeling,Tost-ira-2022-referenee-case
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Sierra Club FOIA 2025-EPA-04883
ED_018388_00000307-00029
SC_EVERSPLIT0006125