Document QpnpB8LmkNkvo3ReVrRDMKK8

From: Vodopivec, Cynthia [Cynthia.Vodopivec@vistracorp.com] ent: 3/31/2025 9:20:17 PM o: AirAction [AirAction@epa.gov] CC: Mitchell, David [David.Mitchell@vistracorp.com]; Collins, Renee [Renee.Collins@luminant.com] object: Presidential Exemption: MATS RTR: Oak Grove Steam Electric Station ttachments:Oak Grove MATS RTR Presidential Exemption letter (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 this letter on behalf of Oak Grove Management Company LLC requesting a Presidential exemption under Section 112(i)(4) of the Clean Air Act ("CAA") from compliance with (1) the mercury standard, and (2) the filterable particulate matter ("fPM") surrogate emission standard for non-mercury metal hazardous air pollutants ("HAP"), and (2) the requirement to install continuous emissions monitoring systems ("CEMS" or "PM CEMS") under the abovereferenced rule (the "MATS RTR" or the "Rule") for the Oak Grove Steam Electric Station ("Oak Grove"). Oak Grove is requesting a two-year exemption, beginning July 6, 2027, from these requirements for Oak Grove Units 1 and 2. Best Regards, Cynthia E. Vodopivec, P.E. SVP -- Environmental, Health & Safety Vistra Corp. vodopivecgvistracorp.com m. 860-604-4844 BEST DEFENSE Sierra Club FOIA 2025-EPA-04883 ED_018388_00000158-00001 SC_EVERSPLIT0005308