Document JJpzxjVvK5bZKQ47xJrGp0pp6

Minnkota Power Cooperative, Inc Milton R Young Station Unt 1 and 2 A14559 013 Rev 2 May 22, 2024 Table 2-4 -- Forecasted 2025 -- 2036 Center Mine Ultimate Coal Analyses (As-Received) Fuel Parameter Mercury Content Higher Heating Value (HHV) Estimated Hg Emission Units ppm Btu/lb Ilp/TBtu ' Average 0.091 6,625 8.41 Minimum Maximum 0.053 0.184 6,489 6,739 4.79 17 42 Industry experience has shown that lignite coal deposits vary significantly in quality, including fuel combustion performance, mineral content, and Hg content, resulting in a coal that can change on a day-to-day basis depending on the coal seam being mined at the time This variability was demonstrated by the range of coal analyses from MRY Unit 1 recent short-term testing in 2024 (average = 10.1 lb/TBtu, with individual results ranging from 4.9 - 18.6 lb/TBtu over the course of five (5) days of testing),Individual coal samples and how they varied across coal feeders, per day are shown in following table. Table 2-5 -- MRY Unit 1 Coal Sampling Analysis Date Sample 19-Mar-24 20-Mar-24 20-Mar-24 21-Mar-24 21-Mar-24 22-Mar-24 22-Mar-24 23-Mar-24 28-Mar-24 1-Apr-24 #1@ 0730 hrs #2@ 1600 hrs #3@ 0100 hrs #1@ 0730 hrs #2@ 1600 hrs #3@ 0100 hrs #1@ 0730 hrs #2@ 1600 hrs #3@ 0100 hrs #1@ 0700 hrs #2@ 1600 hrs #3@ 0100 hrs #1@ 1030 hrs #2@ 1500 hrs #1@ 0930 hrs #2@ 1300 hrs #3@ 1500 hrs Feeder #1 14.5 12.5 6.2 10.9 14.1 7.2 10.4 9.2 10.2 16.3 10.2 Coal Hg Inlet (lb/TBtu) Feeder #3 Feeder #4 Feeder #5 13.0 11.1 8.2 10.5 7 9 7 2 10.1 8 1 7 9 18.6 4.9 7.1 13.4 6.9 11.0 7.8 8 3 14 9 11.9 8 0 6.0 12.1 6 9 Feeder #7 8.0 18.5 7.1 11.4 9.5 12.3 Mercury Testing Results for the MATS Residual Risk and Technology Review Sierra Club FOIA 2025-EPA-04883 Si --gr -vt & Lulu/ay 6 ED_018388_00000327-00020 SC_EVERSPLIT0006329