Document g219L55DaXNOjpL7Oyq6vJv63

RHI MAGNESITA Magnesita Refractories Company 425 S. Salem Church Road York, PA 17408 www.rhimagnesita.corn March 26, 2025 Mr. William C. I Executive Director National Lime Association 200 North Glebe Road Suite 800 Arlington, Virginia 22203 Dear Bill, As General Counsel and Secretary of Magnesita Refractories Company, I hereby authorize the National Lime Association (NLA) to submit a request on our behalf for a two-year presidential exemption of our major source lime plants pursuant to Clean Air Act 112(i)(4) from the requirements of the final rule titled: "National Emission Standards for Hazardous Air Pollutants: Lime Manufacturing Plants Technology Review" (89 FR 57738; July 16, 2024) (Lime Rule). Such exemption, if granted, would extend the compliance date from July 16, 2027 to July 16, 2029, while EPA reconsiders the Lime Rule. The facilities in this request include the following major source lime plants owned and controlled by Magnesita Refractories Company: York Plant 425 S. Salem Church Road York, PA 17408 The emissions standards subject to this exemption include hazardous air pollutant (HAP) standards for hydrogen chloride, mercury, organics, and dioxins & furans. NLA will provide the agency with additional information on why the technology to implement the standard is not available and why it is in the national security interests of the United States to grant the exemption. Sincerely, Mark Plantan General Counsel and Secretary Magnesita Refractories Company RIII Magnesita Sierra Club FOIA 2025-EPA-04883 ED_018388_00000249-00020 SC_EVERSPLIT0006036