Document 82owe38aK4z6enMQNnQZLvkrK

Message From: Tillotson, Elizabeth [Elizabeth.Tillotson@graniteshorepower.com] Sent: 3/31/2025 11:12:51PM To: AirAction [AirAction@epa.gov] Subject: Presidential Exemption: National Emission Standards for Hazardous Air Pollutants [MATS RTR]: Merrimack Staton EIA Plant Code #2364 Attachments:GSP_Merrimack - MATS Presidential Exemption 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 GSP Merrimack LLC ("GSP") requesting a Presidential exemption under Section 1 12(i)(4) of the Clean Air Act ("CAA") from compliance with the revised filterable particulate matter ("fPM") surrogate emission standard for non-mercury metal hazardous air pollutants ("HAP") and the requirement to install and use a particulate matter continuous emissions monitorinv. system ("GEMS" or "PM GEMS") promulgated in the rule, commonly referred to as the MATS RTR, for the two coal-Fired electric generating units ("EGUs") at Merrimack Station in Bow, New Hampshire. If you have any questions regarding this submittal, please contact Elizabeth Tillotson at elizabeth.tillotsonggraniteshorepower.com Thank you. Elizabeth lillotson Vice President Granite Shore Power 431 Ri\cr Road Bow, NH 03304 Office 603.230.7968 Sierra Club FOIA 2025-EPA-04883 ED_018388_00000228-00001 SC_EVERSPLIT0020688