Document xjZnNzG5pkJaDqpQNedO7ex71

Message From: Vodopivec, Cynthia [Cynthia.Vodopivec@vistracorp.com ] Sent: 3/31/2025 9:27:20 PM To: AirAction [AirAction@epa.gov] CC: Mitchell, David [David.Mitchell@vistracorp.com]; Morris, Phil [Phil.Morris@vistracorp.com]; Ross, Jim [Jim.Ross@vistracorp.com] Subject: Presidential Exemption: MATS RTR: Baldwin Power Plant Attachments: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 1 12(i)(4) of the Clean Air Act ("CAA") from compliance with the filterable particulate matter ("1PM") surrogate emission standard for non-mercury metal hazardous air pollutants ("HAP") and the requirement to install continuous emissions monitoring systems ("CEMS" or "PM GEMS") under the above-referenced rule (the "MATS FUR" or the "Rule") for Baldwin Power Plant Units 1 and 2 ("Baldwin"). Dynegy Midwest Generation, I.I.C is requesting a two-year exemption, beginning July 6, 2027, from these requirements for the Baldwin facility. Best Regards, Cynthia E. Vodopivec, P.B. SVP Environmental. Health & Safety Vistra Corp. ( m.860-604-4844 Sierra Club FOIA 2025-EPA-04883 ED_018388_00000173-00001 SC_EVERSPLIT0020651