Region 6 Compliance Assurance and Enforcement Division INSPECTION REPORT Inspection Date(s): Media: Regulatory Program(s) April 10, 2015 CWA 311 SPCC Underground Injection Control - Brine Company Name: J &B Oil LLC Facility Name: TC Patton Lease Facility Physical Location: NW/4 Section 32-T15S-R16W (city, state, zip code) Smackover, AR Mailing Address: 812 Elm Street (city, state, zip code) Smackover, AR 71762 County/Parish: Ouachita County Facility Contact N/A N/A FFRSilNi umCber: N/A Identification/Permit Number: N/A Media Number: N/A NAICS: 21111 SIC: 1311 Personnel participating in the inspection: Kent Sanborn N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 6EN-WR N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A EPA Inspector N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A EPA Lead Inspector Signature/Date Kent Sanborn Kent Sanborn Digitally signed by Kent Sanborn DN: cn=Kent Sanborn, o=EPA, ou, email=sanborn.kent@epa.gov, c=US Date: 2015.05.26 13:11:55 -05'00' 918-557-1615 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Date Supervisor Signature/Date WILLIE LANE Digitally signed by WILLIE LANE DN: c=US, o=U.S.

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 Compliance Assurance and Enforcement Division INSPECTION REPORT Inspection Date(s): Media: Regulatory Program(s) 02/07/2018 Water NPDES - Oil and Gas, Produced/Brine Water Company Name: Facility Name: Facility Physical Location: (city, state, zip code) Mailing address: (city, state, zip code) County/Parish: Facility Contact: FF&N Oil Company Diffey No1 Manville No5 SWD 482 Pine Tree Rd, El Dorado, AR 71730 (33.157155 N, -92.512298 W) El Dorado, AR 71730 239 Frisby Road El Dorado, AR 71730 Union County David B.

EPA Inspection Report - Page 1 of 12 Region 6 Compliance Assurance and Enforcement Division INSPECTION REPORT Inspection Date(s): Media: Regulatory Program(s) 7/31/2018 Water CWA - NPDES Company Name: Facility Name: Facility Physical Location: (city, state, zip code) Mailing address: (city, state, zip code) County/Parish: Facility Contact: City of Ruidoso Downs and Village of Ruidoso Ruidoso/Ruidoso Downs WWTP 26675 U.S.

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.

Inspector Inspection Due Matthew Allen Well Inspection Osage DNR / Environmental Protection Agency 1201 Elm Street, Suite 500 Dallas, Texas 75270 Inspection Date 2022-03- Time 08:30 30T00:00:00Z Operator Representative Calgary Energy, LLC Operator Info Calgary Energy, LLC 4444 E. 146th St.