Document 805oZM5Z8GD79DBOxX7BYzkK

From: Vodopivec, Cynthia [Cynthia.Vodopivec@vistracorp.com] ent: 3/31/2025 9:23:01PM o: AirAction [AirAction@epa.gov] CC: Mitchell, David [David.Mitchell@vistracorp.com]; Collins, Renee [Renee.Collins@luminant.com] object: Presidential Exemption: MATS RTR: Martin Lake Station ttachments:Martin Lake 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 the attached letter on behalf of Luminant Generation Company LLC ("Luminant") 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 the Martin Lake Steam Electric Station ("Martin Lake"). Luminant is requesting a two-year exemption, beginning July 6, 2027, from these requirements for Martin Lake Units 1, 2, and 3. Best Regards, Cynthia E. Vodopivec, P.E. SVP -- Environmental, Health & Safety Vistra Corp. Cynt!-i:.vodopivecvT,vistracorp.com m. 860-604-4844 Sierra Club FOIA 2025-EPA-04883 ED_018388_00000156-00001 SC_EVERSPLIT0005307