Document VjJg0dYpkJ8aw0d2KN9dbNR2j

Minnkota Power Cooperative, Inc Milton R Young Station Unt 1 and 2 A14559 013 Rev 2 May 22, 2024 Storage duration: Approximately 18 days based on silo capacity of 105,000 lbs and total combined PAC consumption rate of 244 lb/hr (MRY Unit 1 at 86 lb/hr and MRY Unit 2 at 158 lb/hr) MRY Unit 1 (257 MWg) Fuel Additive: ARQ (formerly ADA) M -Prove s Average M-Prove application rate: 6.0 ppm s Maximum M-Prove dosage pump rate: 18.0 ppm Non-brominated PAC Injection: s Maximum Train A PAC injection at 100% feeder rate: 1 43 lb/min (approximately 86 lb/hr or 1.06 lb/MMacf) s Transport piping limited to 192 lb/hr (2.37 lb/MMacf) to avoid pluggage issues s PAC injected into flue gas using eight (8) lances located across the APH outlet duct. s The lance depths vary from 18" -- 54" to provide even distribution of PAC into the flue gas stream MRY Unit 2 (470 MWg) Fuel Additive: ARQ (formerly ADA) M -Prove s Average M-Prove application rate: 8.0 ppm s Maximum M-Prove dosage pump rate: 18.0 ppm Non-brominated PAC Injection: s Maximum Train B and C PAC injection at 100% feeder rate: 2 64 lb/min (approximately 158 Ibihr or 1.12 lb/MMacf) s PAC injected into flue gas using eight (8) lances located across each of the North and South APH outlet ducts for a total of sixteen (16) lances. s The lance depths vary from 15" - 78" to provide even distribution of PAC into the flue gas stream Mercury Testing Results for the MATS Residual Risk and Technology Review Sierra Club FOIA 2025-EPA-04883 2 Si --gr -vt & Lulu/ay ED_018388_00000327-00016 SC_EVERSPLIT0006325