Document 9EaXxw1d7E6X1p12zJvoY336

Ascend Performance Materials Operations LLC March 31, 2025 Page 3 Decatur, AL 35601 Alabama Department of Environmental Management Process Vents: 40 C.F.R. 63.113 to 118 Storage Vessels: 40 C F.R. 63.119 to 123 Notification & Reporting: 40 C.F.R. 63 151 to 152 Pressure Relief Devices: 40 C.F.R. 165(e) Fenceline Monitoring: 40 C F.R. 53.184(a)(1) 2. Ascend Alvin: Monsanto Rd FM 2917 Alvin, TX 77511 Title V Permit Nos. 2321 & 2324 Texas Commission on Environmental Quality Flares: 40 C.F.R. 63 107 & 108 Process Vents: 40 C.F.R. 63.113 to 118 Storage Vessels: 40 C F.R. 63 119 to 123 Notification & Reporting 40 C.F R 63 151 to 152 Pressure Relief Devices: 40 C.F.R. 165(e) Fenceline Monitoring: 40 C F.R. 53.184(a)(1) 3. Ascend Pensacola: 3000 Old Chemstrand Rd Cantonment, FL 32533 Title V Permit No. 0330040- 077-AV Florida Department of Environmental Protection Flares: 40 C.F.R. 63 107 & 108 Process Vents: 40 C.F.R. 63.113 to 118 Storage Vessels: 40 C F.R. 63.119 to 123 Notification & Reporting 40 C.F R 63 151 to 152 Pressure Relief Devices: 40 C.F.R. 165(e) Fenceline Monitoring: 40 C F.R. 53.184(a)(1) Justification for Presidential Exemption A. The Technology to Implement the Above Standards Is Not Available In addition to this request for a Presidential exemption under CAA 112(i)(4), Ascend also plans to submit requests for compliance schedules for existing sources under CAA 112(i)(3) for the three facilities identified above. To meet the aggressive deadlines of the HON Rule, Ascend would have had to initiate feasibility assessments and initial design for the control projects well before the Final Rule was even published. None of these projects has a realistic prospect of completion pursuant to the HON Rule's current compliance deadlines. Sierra Club FOIA 2025-EPA-04883 ED_018388_00000135-00003 SC_EVERSPLIT0005823