Document 2q72vmzwaojjY67oXQnqXk3zb

OLYMPUS Power, LLC. i;i?.iiii. ]' I,:. \1.H n Mr. Lee Zeldin, Administrator US Environmental Protection Agency 1200 Pennsylvania Avenue, NW Washington, DC 20460 Mail Code 1101A airaction@epa.gov March 28, 2025 Subject: Presidential Exemption, National Emissions Standards for Hazardous Air Pollutants: Coaland Oil-Fired Electric Utility Steam Generating Units Review of the Residual Risk and Technology Review (89 FR 38508; May 7, 2024) (MATS Rule), for Walleye Power, LLC Bay Shore Unit 1 located in Oregon, Ohio. Dear Administrator Zeldin: Olympus Power, LLC (Olympus) is writing to request a Presidential two-year exemption from the revised MATS rule Filterable Particulate Matter (FPM) emissions standard for Walleye Power, LLC Bay Shore Unit 1 (Bay Shore Unit 1). In the revised MATS rule for existing Solid oil-derived fuel compliance methodology for FPM was changed from: requiring filterable particulate matter source emissions testing using the average of three test runs, in accordance with Table 5 to Subpart UUULJU of Part 63 -- Performance Testing Requirements, 1. Filterable Particulate matter (PM), Emissions Testing, to determine the emissions from the unit; to requiring the use of continuous filterable particulate matter continuous emissions monitoring system (FPM CEMS). Requiring FPM CEMS as the compliance methodology also changes the compliance averaging period from testing once every three years as a Filterable Particulate Matter Low Emitting Electric Generating Unit (FPM LEE) to continuous monitoring, FPM CEMS. The abandonment of the methodologies specified in the current Title 40 Part 63, Subpart UULJUU changes the FPM limit in the revised rule to a far more stringent limit tan the numerical limit demonstrated using the methodologies contained in Table 5 to Subpart UULJUU of Part 63 -- Sierra Club FOIA 2025-EPA-04883 ED_018388_00000255-00001 SC_EVERSPLIT0006044