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Message From: Chris Hayes [Chris.Hayes@stepan.com ] Sent: 3/31/2025 8:20:29 PM To: AirAction [AirAction@epa.goy] CC: Chris Hayes [Chris.Hayes@stepan.com ] Subject: Presidential Exemption: NSPS for the SOCMI and NESHAP for the SOCMI and Group I & II Polymers and Resins ("HON Rule"): Stepan Company, Millsdale, Illinois Facility Attachments:Stepan Company-Request for Exemption.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, On behalf of Stepan Company, please approve Stepan's formal request that is described in the attached letter concerning a Presidential Exemption of 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 1 & II Polymers and Resins ("HON Rule") for the Stepan Company, Millsdale, Illinois Facility. Stepan appreciates EPA's and the 'Frump Administration's consideration of the attached request. Sincerely, Christopher I layes Stepan S Christopher (Chris) W. Hayes Senior Counsel, Environmental, Health, & Safety Mobile Phone: 615-968-3054 I Email: chris.hayes@stepan.com Mailing Address: Stepan Company (Attn: Legal Department) 1101 Skokie Blvd., Northbrook, Illinois 60062 For more information, visit www.stepan.com Stepan Company Innovative Chemical Solutions for a Cleaner, Healthier, More Energy Efficient World The information and materials contained in or attached to this e-mail may be confidential and/or privileged. The information and materials are for the intended recipient only. You are hereby notified that any unauthorized use, disclosure, copying, or distribution of the information or attached materials is prohibited and may be unlawful. If you have received this information or the materials in error, please notify the sender immediately at the phone number and email address above and then destroy the contents. Sierra Club FOIA 2025-EPA-04883 ED_018388_00000125-00001 SC_EVERSPLIT0020969 Disclaimer L:- .) :3 V 3 D L1%- !_ . L. : Sierra Club FOIA 2025-EPA-04883 ED_018388_00000125-00002 SC_EVERSPLIT0020970