Document 3eLYR3GvjreLEm3qajdG7oBEE

Message From: Boonsombat, Nattaya (N) [BNattaya@dow.com] Sent: 3/31/2025 6:09:48 PM To: AirAction [AirAction@epa.gov] Subject: "Presidential Exemption Request" -- HON Rule -- Union Carbide/Dow St. Charles, LA Operations Attachments:3_UCC_St Charles for CAA 11214 Request March 2025.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 Io Whom it May Concern: Please find attached a letter and Attachment #1 in support of a Presidential Exemption Request for the !ION rule for our St. Charles, LA Operations site. We appreciate EPA's review of this request and are happy to answer any questions as you review the attached information. Nattaya Boonsombat Office.: --[ 95! ".7t3 5939 General Business Sierra Club FOIA 2025-EPA-04883 ED_018388_00000045-00001 SC_EVERSPLIT0020549