Document G6VVVZRo5nOrz1vKdde5wEVbm

Respectfully, Pcievdat, D. 7 , 7oectri4i, I Sr. Manager - Environmental pmccain@westlake.com I P:337.708.4688 I C:337.309.5914 Westlake Corporation P.O. Box 1000, Lake Charles, Louisiana 70602 The information transmitted, including any attachments, is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking ofany action in reliance upon, this information by persons or entities other than the intended recipient is prohibited, and all liability arising therefromis disclaimed.Ifyou received this in error, please contact the sender and delete the material fromany computer. Sierra Club FOIA 2025-EPA-04883 ED_018388_00005517-00002 SC_EVERSPLIT0005404 Message From: Sent: To: CC: Subject: AirAction [/O=EXCHANGELABS/OU=EXCHANGE ADMINISTRATIVE GROUP (FYDIBOHF23SPDLT)/CN=RECIPIENTS/CN=FA78B98923384078995E04A73D258D83-AIRACTION] 4/1/2025 1:17:21PM Bound, Nick [NBound@ameren.com] Giesmann, Craig J [CGiesmann@ameren.com] RE: Ameren Missouri Request for a Presidential Exemption Pursuant to CAA Section 112(i)(4) for EPA's Final Rule Amending the National Emission Standards for Hazardous Air Pollutants For Coal- And Oil-Fired Electric Utility Steam Generating Units Thank you for emailing the AirAction mailbox to request a Presidential Exemption under section 112(i)(4) of the Clean Air Act and for engaging with EPA in advancing President Trump's Executive Orders and Powering the Great American Comeback. We have received your email and will be in contact soon. If you have Confidential Business Information (CBI) that you'd like to submit, please submit it in electronic version to the CBIAepa.go,, inbox or in hardcopy to: USEPA, OAQPS CORE CBI Office 4930 Old Page Road Durham, NC 27703 From: Bound, Nick <NBound@ameren.com> Sent: Monday, March 31, 2025 4:03 PM To: AirAction <AirAction@epa.gov> Cc: Giesmann, Craig J <CGiesmann@ameren.com> Subject: Ameren Missouri Request for a Presidential Exemption Pursuant to CAA Section 112(i)(4) for EPA's Final Rule Amending the National Emission Standards for Hazardous Air Pollutants For Coal- And Oil-Fired Electric Utility Steam Generating Units I Caution: This email originated from outside EPA, please exercise additional caution when deciding whether to open attachments or click on provided links. Dear Administrator Zeldin, In accordance with the Mercury and Air Toxics Standards (MATS) fact sheet and EPA's March 12, 2025 request, Ameren Missouri submits our Presidential Exemption request for the Labadie and Sioux Energy Centers. Thanks, Nick Bound Environmental Scientist Environmental Services -- Air Quality C 618.771.7042 E NBouncl(a),ameren.com Amere.. wH000uri : 1901 Chouteai avenue St. Louis, MO 63166 This communication and any attachments may be privileged and/or confidential and protected from disclosure, and are otherwise the exclusive property of Ameren Corporation and its affiliates (Ameren) or the intended recipient. If you are not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. Note that any views or opinions presented in this message do not necessarily represent those of Ameren. All e-mails are subject to Ameren policies. If you have received Sierra Club FOIA 2025-EPA-04883 ED_018388_00005519-00001 SC_EVERSPLIT0005405