Document EvjE9do9kDvEDDpXBZknkrzDL

Message From: Hejmadi, Prashanth [phejmadi@westlake.com] Sent: 3/31/2025 7:24:13 PM To: AirAction [AirAction@epa.gov] CC: Szabo, Aaron [Szabo.Aaron@epa.gov]; Tardif, Abigale (Abbie) [Tardif.Abigale@epa.gov ]; Donahue, Sean [donahue.sean@epa.gov ]; Dominguez, Alexander [dominguez.alexander@epa.gov ]; Tsirigotis, Peter [Tsirigotis.Peter@epa.gov ]; Lassiter, Penny [Lassiter.Penny@epa.gov ]; Lessard, Patrick [Lessard.Patrick@epa.gov ]; Bouchard, Andrew [Bouchard.Andrew@epa.gov ]; Newman, Susan [snewman@westlake.com] Subject: HON Section 112(i)(4) waiver request Attachments:Westlake Deer Park Texas Facility CAA Section 112(i)(4) 2 year Waiver Request.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 .I.o whom it may concern Please see attached, a request for Presidential Exemption for Westlake Epoxy Inc.'s HON-covered facility at 5900 Highway 225, Gate 73, Deer Park, Texas 77536, as requested by L.S. EPA of the regulated community. As explained in greater detail in the attached letter, Westlake is seeking a Presidential Exemption under the New Source Performance Standards for the Synthetic Organic Chemical Manufacturing Industry and National Emission Standards for hiazardous Air Pollutants for the Synthetic Organic Chemical Manufacturing Industry and Group I & I1 l'olymcrs and Resins. Sec 89 FR 42932; May 16, 2024 (HON Rule). As Westlake's evaluation of the requirements under the HON rule progresses and we continue to develop our compliance plans, Westlake may have additional detail or more concrete information related to the technical challenges, time required, and costs for coming into compliance with the HON rule. Some of that more detailed information may include confidential business information which Westlake would be willing to provide under the appropriate protections for such competitive and trade secret information. Please contact Susan Newman at L',1 should EPA or the President require more detailed information about specific impacts to Westlake's Deer Park Plant. Thank you for the timely consideration of this request. Sierra Club FOIA 2025-EPA-04883 ED_018388_00000089-00001 SC_EVERSPLIT0020585 Vestlake Epoxy Prashanth Hejmadi I Plant Manager, Deer Park plielinacUmestlake.com l Office 281-727-3151l Cell: 832-284-5015 Westlake Epoxy, a Westlake company Hwy 225, Gate 7B, Deer Park, TX, 77536 www.westlake.com Sierra Club FOIA 2025-EPA-04883 ED_018388_00000089-00002 SC_EVERSPLIT0020586