Document x11YwMX2OYyg0ZZK4zw1KR1pQ

From: Vodopivec, Cynthia [Cynthia.Vodopivec@vistracorp.com] ent: 3/31/2025 9:27:20 PM o: AirAction [AirAction@epa.gov] CC: Mitchell, David [David.Mitchell@vistracorp.com]; Morris, Phil [Phil.Morris@vistracorp.com]; Ross, Jim [Jim.Ross@vistracorp.com] object: Presidential Exemption: MATS RTR: Baldwin Power Plant ttachments:Baldwin_MATS Presidential Exemption Request (3-31-25).pdf Caution: This email originated from outside EPA, please exercise additional caution when deciding whether to open attachments or click on provided links. Flag: Follow up Please accept the attached letter on behalf of Dynegy Midwest Generation, LLC requesting a Presidential exemption under Section 112(i)(4) of the Clean Air Act ("CAA") from compliance with the filterable particulate matter ("fPM") surrogate emission standard for non-mercury metal hazardous air pollutants ("HAP") and the requirement to install continuous emissions monitoring systems ("CEMS" or "PM CEMS") under the above-referenced rule (the "MATS RTR" or the "Rule") for Baldwin Power Plant Units 1 and 2 ("Baldwin"). Dynegy Midwest Generation, LLC is requesting a two-year exemption, beginning July 6, 2027, from these requirements for the Baldwin facility. Best Regards, Cynthia E. Vodopivec, P.E. SVP -- Environmental, Health & Safety Vistra Corp. Cynth ...vodopivecia.),vistracorp.com m. 860-604-4844 Sierra Club FOIA 2025-EPA-04883 ED_018388_00000173-00001 SC_EVERSPLIT0005314