Document DGBRe7Exn9M5k2YK55rqova25

Message From: Davis, Dustin [DDavis2@westlake.com ] Sent: 3/31/2025 5:42:32 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 ] Subject: CAA Section 112(i)(4) Waiver Request - Westlake Vinyl's Inc. - Calvert City, KY Attachments:2025.03.31 - CAA Section 112(1)(4) Waiver Request to US EPA - Westlake - Calvert City Facility.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 To whom it may concern -- Please see attached, a request for Presidential Exemption for Westlake Vinyl's Inc. HON-covered facility at 2468 Industrial Parkway, Calvert City, Kentucky 42029, as requested by U.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 Hazardous Air Pollutants for the Synthetic Organic Chemical Manufacturing Industry and Group I & II Polymers and Resins. See 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 Mr. Dustin Davis at ddavis2@westlake.com should EPA or the President require more detailed information about specific impacts to Westlake's Calvert City Facility. Thank you for the timely consideration of this request. Sierra Club FOIA 2025-EPA-04883 ED_018388_00000041-00001 SC_EVERSPLIT0020545 Thank you, Dustin R. Davis, CSP Sr. Manager -- HSE, Region 3 Ddavis2emestlake.Gorn Office: (270) 395-3397 Vesttake PO Box 712; 2468 Industrial Parkway, Calvert City, Kentucky 42029 www.westlake.com Sierra Club FOIA 2025-EPA-04883 ED_018388_00000041-00002 SC_EVERSPLIT0020546