Document ab8kMx07VgyvXV6NBLry530y

into MRY Unit 1 is not an adequate control strategy to achieve the New Mercury Limitation and that EPA ignored and erroneously omitted limitations of ACT in its achievability conclusion . Attachment A, at Figure 2-1. The scatterplot from the Report is presented below. Figure 2-1 -- MRY Unit 1 Existing System Mercury Removal Performance Capabilities using Brominated PAC 100 0 90 0 -- .S0 0 2 70 s 600 -- no -- 40 0 ' 0 00 0h0 1 00 1 SO 200 2 SO 3 00 3 SU Amomirlaied PAC 'mi.:liars Rafe, II,MMarf 34. Mercury testing and analysis of data at MRY confirms and supports Minnkota's belief that numerous variables affect its mercury emissions rate. Specifically, Minnkota observed mercury emissions rate fluctuations based on unit load, mercury content in lignite, and normal variability in unit operation and control equipment function. Some hourly -1 8- Sierra Club FOIA 2025-EPA-04883 ED_018388_00000327-00070 SC_EVERSPLIT0006379