Document VKLpqgzjDKy9R4RrJG8ajo1n4

Message From: Toni Geroy [tjgeroy@gvea.com] Sent: 3/31/2025 6:52:57 PM To: AirAction [AirAction@epa.goy] CC: Naomi J. Morton Knight [nmknight@gvea.com]; Toni Geroy [tjgeroy@gvea.com] Subject: Presidential Exemption: MATS: Golden Valley Electric Association Healy Power Plant Attachments:20250331_Request for a Presidential Exemption_sbmtd.pdf Caution: This email originated from outside EPA, please exercise additional caution when deciding whether to open attachments or click on provided links. Importance: High Flag: Follow up To Whom it May Concern. Golden Valley Electric Association, Inc. (GVEA) operates two existing coal-fired Electric Utility Steam Generatinv. Units (EGUs) at the Healy Power Plant in Healy, Alaska. These two EGUs are subject to the National Emissions Standards for Hazardous Air Pollutants (NES1IAP) in 40 CFR 63 Subpart UUUUU. GVEA is requesting a Presidential Exemption from the following standards for these two EGUs under Clean Air Act Section 112(i)(4). Detailed information to support this request is provided below. The body of this request and attachments referenced below are assembled formally in the attachment to this email message. Regulation: National Emissions Standards for Hazardous Air Pollutants (NESHAP); Coal- and Oil-Fired Electric Utility Steam Generating Units Review of the Residual Risk and Iechnology Review; 40 Code of Federal Regulations (GFR) 63 Subpart UUUUU as Amended on May 7, 2024 [89 Federal Register (FR) 38508] Facility: GVEA Healy Power Plant Emissions Units: Healy Emissions Unit 1 (EU 1D 1) and Unit 2 (EU 1D 2), existing coal-Fired units, low rank virgin coal Pollutants: 1) Filterable Particulate Matter (PM) as a surrogate for non-hazardous air pollutant (non-HAP) metals emissions Amended Standard: 0.010 pounds per million British thermal units (lb!MMBtu) Compliance Date: July 6, 2027 Current Standard: 0.030 lb'MMBtu Amended Compliance Demonstration Method: PM continuous emissions monitoring system (GEMS) Current Compliance Demonstration Method: PM continuous emissions monitoring system (CEMS) or quarterly performance (source) tests 2) Mercury (Hg) Amended Standard: 1.2 pounds per trillion British thermal units (1b/TBtu) Compliance Date: July 6, 2027 Current Standard: 4.0 lb/TBtu Requested Exemption Period: 2 Years Sierra Club FOIA 2025-EPA-04883 ED_018388_00000056-00001 SC_EVERSPLIT0005596