UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION 6 1201 ELM STREET, SUITE 500 DALLAS, TEXAS 75270 TRANSMITTED VIA E-MAIL December 18, 2020 Mr.

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION 6 1201 ELM STREET, SUITE 500 DALLAS, TEXAS 75270-2102 March 28, 2023 TRANSMITTED VIA E-MAIL Mr.

REGION 6 DALLAS, TX 75270 March 27, 2024 TRANSMITTED VIA E-MAIL The Honorable David Moreno Mayor of Donna 307 South 12th Street Donna, Texas 77537 dmoreno@cityofdonna.org Re: Administrative Order; Docket Number: CWA-06-2024-1741 City of Donna TPDES Permit Number: TX0132802 Dear Mayor Moreno: Enclosed is an Administrative Order (AO) issued to the City of Donna, for violations of the Clean Water Act (CWA) (33 U.S.C. 1251 et seq.).

Region 6 - Enforcement & Compliance Assurance Division INSPECTION REPORT Inspection Date(s): Media Program: Regulatory Program(s) 10/07/2024 Water Clean Water Act Company Name: Facility Name: Facility Physical Location: (city, state, zip code) Mailing address: (city, state, zip code) County/Parish: Facility Phone Number Facility Contact: Corley Trust, LLC Wilson #7 SWD Tank Battery Latitude: 33.35372, Longitude: -92.69236 Smackover, AR, 71762 410 W. 6th Smackover, AR 71762 Union County 870-725-3928 Jeff Corley corleytrust@att.net FRS Number: Identification/Permit Number: Media Identifier Number: NAICS: SIC: NA ARU002260 NA 211111 1311 Personnel participating in inspection: Uma Lad (lead) EPA/Region 6 ECDW Kerri McCabe EPA/Region 6 ECDW Michael Blaha EPA/Region 6 ECDW Enforcement Officer/Inspector Enforcement Officer/Inspector Enforcement Officer/Inspector EPA Lead Inspector Signature/Date Supervisor Signature/Date UMA LAD Uma Lad Digitally signed by UMA LAD Date: 2024.11.19 11:24:50 -06'00' Date JEANNE ECKHART Date: 2024.11.25 09:16:05 -06'00' Digitally signed by JEANNE ECKHART Jeanne Eckhart Date 6ENFORM-019-R8.2 (02/12/2020) 1 Section I - INTRODUCTION Corley Trust, LLC - Wilson #7 SWD Tank Battery / ARU002260 (CWA) Inspection Date 10/07/2024 PURPOSE OF THE INSPECTION EPA Region 6 inspectors Michael Blaha, Kerri McCabe, and I, Uma Lad, arrived at Corley Trust, LLC - Wilson #7 SWD Tank Battery, located off a lease road near Gas Plant Road (33.353727, -92.69236) at 5:55 PM on October 7, 2024, for an unannounced inspection.

Inspector Well Inspection Osage DNR / Environmental Protection Agency 1201 Elm Street, Suite 500 Dallas, Texas 75270 Matthew Allen Inspection Date 04/28/2025 Time 08:45 Operator Representative CapturePoint, LLC Operator Info CapturePoint, LLC 1101 Central Expwy S., Suite 150 Allen, TX 75013 Phone: 832-300-8221 Inventory ID API Well No Lease Name Well ID OS0508000 North Burbank Unit 82-W6 Location SW 35 27N 05E Status Inactive Well Type Enhanced Recovery Latitude 36.774004 Longitude -96.737961 Inspection Plugging Witnessed Reason Responsible Company at CapturePoint, LLC Time of Inspection Inspect No.

Region 6 - Enforcement & Compliance Assurance Division INSPECTION REPORT Inspection Date(s): Media Program: Regulatory Program(s) 06/04/2025 Water CWA Company Name: Facility Name: Facility Physical Location: (city, state, zip code) Mailing address: (city, state, zip code) County: Facility Phone Number Facility Contact: Universal City, City of Wastewater Utility Department Public Works Building Universal City, TX 78148 2150 Universal City Blvd.

Region 6 - Enforcement & Compliance Assurance Division INSPECTION REPORT Inspection Date(s): Media Program: Regulatory Program(s) 05/29/2025 Water Clean Water Act-National Pollution Discharge Elimination System (Brine) Company Name: Facility Name: Facility Physical Location: (city, state, zip code) Mailing address: (city, state, zip code) County/Parish: Facility Phone Number Facility Contact: R&D Resources Stoney #1 Latitude: 36.695385, Longitude: -96.321745 Pawhuska, OK, 74056 19407 E 126th St.

Inspection Report Mechanical Integrity Test Osage DNR / Environmental Protection Agency 1201 Elm Street, Suite 500 Dallas TX 75270 Inspector Matthew Allen MIT Date 07/08/2025 Operator Representative Tallgrass Resources, LLC Report Sent Operator Time 09:00 Inject Interval 2900 - 2970 USDW 595 Well Type Dual Completion Annulus Fluid Type Casing 7 Concentric Pkr Tubing 2.875 Packer Depth 2668 Operator Info Tallgrass Resources, LLC 1569 E 21st Street, Suite 215 Tulsa, OK 74114 Phone: 918-270-9927 Inventory ID API Well No Lease Name Well ID OS1436000 JAC 3 Location NE 29 28N 08E Type of MIT Ada Pressure Test Test Reason Routine Injecting Y Injection Rate (bpd) Tubular Lining Ann Filled (hrs) MIT Due 07/30/2023 MIT Freq EVERY FIVE YEARS Ann Press Mont Time Pre-Test Tubing Pressure 0 Annulus Pressure 0 Flowback Pressure High Volume Initial 09:00 200 200 Mid Mid 09:15 200 200 Low Final 09:30 200 200 End Total Volume ADA Pressure Test - Required Test Pressure (Fluid Column Ht * Specific Gravity * .433 / N2 Wt Fac = Required Test Pressure) Tubing Annulus Depth to Top Perf/Open Hole Depth to Fluid Level Fluid Column Level 2900 197 2703 Specific Gravity of Fluid 1.06 Nitrogen Weight Factor 1.1064 Required Pressure Test 1121.31 Remedial Action Type Fluid Migration Test Type Inspection Comments Inspector Signature Remedial Action Type Well, OS1436000 had a calculated test pressure of 1121 psi, the well failed to achieve the required test pressure.

Inspection Report Mechanical Integrity Test Osage DNR / Environmental Protection Agency 1201 Elm Street, Suite 500 Dallas TX 75270 Inspector Matthew Allen MIT Date 07/09/2025 Operator Representative Tallgrass Resources, LLC Report Sent Operator Time 12:00 Inject Interval 2900 - 2970 USDW 595 Well Type Dual Completion Annulus Fluid Type Casing 7 Concentric Pkr Tubing 2.875 Packer Depth 2668 Operator Info Tallgrass Resources, LLC 1569 E 21st Street, Suite 215 Tulsa, OK 74114 Phone: 918-270-9927 Inventory ID API Well No Lease Name Well ID OS1436000 JAC 3 Location NE 29 28N 08E Type of MIT Ada Pressure Test Test Reason Post Workover Injecting N Injection Rate (bpd) Tubular Lining Ann Filled (hrs) MIT Due 07/30/2023 MIT Freq EVERY FIVE YEARS Ann Press Mont Time Pre-Test Tubing Pressure 0 Annulus Pressure 0 Flowback Pressure High Volume Initial 12:00 150 150 Mid Mid 12:15 150 150 Low Final 12:30 150 150 End Total Volume ADA Pressure Test - Required Test Pressure (Fluid Column Ht * Specific Gravity * .433 / N2 Wt Fac = Required Test Pressure) Tubing Annulus Depth to Top Perf/Open Hole 2900 Depth to Fluid Level 197 Fluid Column Level 2703 Specific Gravity of Fluid 1.06 Nitrogen Weight Factor 1.1064 Required Pressure Test 1121.31 Remedial Action Type Fluid Migration Test Type Inspection Comments Inspector Signature Remedial Action Type Well, OS1436000 was pressured to 150psi on the tubing after a workover rig had applied additional tension to the packer.

Inspector Operator Info Location Well Inspection Osage DNR / Environmental Protection Agency 1201 Elm Street, Suite 500 Dallas, Texas 75270 Matthew Allen Inspection Date 10/16/2025 Time 11:30 Operator Representative Contango Resources, LLC Contango Resources, LLC Inventory ID OS2836000 1717 South Boulder, Suite 900 Tulsa, OK 74119 Phone: 918-392-3396 API Well No Lease Name NRU Well ID 4W6 SE 09 24N 07E Status Inactive Well Type Enhanced Recovery Latitude 36.567642 Longitude -96.551732 Inspection Plugging Witnessed Reason Responsible Company at Contango Resources, LLC Time of Inspection Inspect No.

Inspector Well Inspection Osage DNR / Environmental Protection Agency 1201 Elm Street, Suite 500 Dallas, Texas 75270 Matthew Allen Inspection Date 02/04/2026 Time 08:30 Operator Representative Contango Resources, LLC Operator Info Contango Resources, LLC 1717 South Boulder, Suite 900 Tulsa, OK 74119 Phone: 918-392-3396 Inventory ID API Well No Lease Name Well ID OS2880000 NRU 20W3 Location SE 21 24N 07E Status Active Well Type Enhanced Recovery Latitude 36.542391 Longitude -96.558331 Inspection Requested By Compliance Reason Staff Responsible Company at Contango Resources, LLC Time of Inspection Inspect No.

Region 6 - Enforcement & Compliance Assurance Division INSPECTION REPORT Inspection Date(s): Media Program: Regulatory Program(s) 03/31/2026 Water Clean Water Act - National Pollution Discharge Elimination System (Brine) Company Name: Facility Name: Facility Physical Location: (city, state, zip code) Mailing address: (city, state, zip code) County/Parish: Facility Phone Number Facility Contact: McCann Resources, Inc Bowring Lease Latitude: 36.877700, Longitude: -96.123734 Bowring, Oklahoma, 74056 2300 N Lincoln Blvd Rm 101 Oklahoma City, Oklahoma, 73105 Osage County (918) 798-4365 Mark McCann Owner/Operator mccanncompanies@yahoo.com FRS Number: Identification/Permit Number: Media Identifier Number: NAICS: SIC: n/a OKU000848 n/a 211111 1311 Personnel participating in inspection: Matthew Allen EPA, Region 6ECDWE Inspector EPA Lead Inspector Signature/Date Supervisor Signature/Date MATTHEW ALLEN Date: 2026.04.16 10:40:15 -05'00' Digitally signed by MATTHEW ALLEN Matthew Allen Date JEANNE ECKHART Date: 2026.04.20 07:38:29 -05'00' Digitally signed by JEANNE ECKHART Jeanne Eckhart Date 6ENFORM-019-R8.2 (02/12/2020) 1 Section I - INTRODUCTION McCann Resources, Inc / Bowring Lease Inspection Date 03/23/2026 PURPOSE OF THE INSPECTION EPA Region 6 inspector Matthew Allen arrived at the, McCann Resources Inc, Bowring Lease, (EPA ID No.

Region 6 - Enforcement & Compliance Assurance Division INSPECTION REPORT Inspection Date(s): Media Program: Regulatory Program(s) Company Name: Facility Name: Facility Physical Location: (city, state, zip code) Mailing address: (city, state, zip code) County/Parish: Facility Phone Number Facility Contact: 2/25/2020 Water CWA - Brine Slant Operating, LLC Denney Lease 34.0383548, -99.2830654 Vernon, Texas 76384 206 E. 9th St., Ste. 1300 Austin, Texas 78701 Wichita County 940-264-4455 Main Office FRS Number: Identification/Permit Number: Media Identifier Number: NAICS: SIC: N/A TXU011251 N/A 21111 1311 Personnel participating in inspection: Jeanne Eckhart EPA 6 ECDWE Kayla Woods EPA 6 ECDWE Inspector Inspector EPA Lead Inspector Signature/Date Supervisor Signature/Date JEANNE ECKHART Digitally signed by JEANNE ECKHART DN: c=US, o=U.S.

Region 6 - Enforcement & Compliance Assurance Division INSPECTION REPORT Inspection Date(s): Media Program: Regulatory Program(s) February 26, 2020 Water - Produced Water (Brine) Clean Water Act, National Pollution Discharge Elimination System Company Name: Facility Name: Facility Physical Location: (city, state, zip code) Mailing address: (city, state, zip code) County/Parish: Facility Phone Number Facility Contact: Cantrell Energy Corporation SW Ardmore Tulip Creek Sand Unit (SWAT) 34.0934583 N, -97.1701522 W Ardmore, Oklahoma 73401 522 East 12th St.

Region 6 - Enforcement & Compliance Assurance Division INSPECTION REPORT Inspection Date(s): Media Program: Regulatory Program(s) Company Name: Facility Name: Facility Physical Location: (city, state, zip code) Mailing address: (city, state, zip code) County/Parish: Facility Phone Number Facility Contact: 03/31/2021 Water CWA - NPDES, Produced Water McCann Resources, Inc.