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Inspector Operator Info Location Latitude Well Inspection Osage DNR / Environmental Protection Agency 1201 Elm Street, Suite 500 Dallas, Texas 75270 Matthew Allen Inspection Date 09/15/2025 Time 10:30 Operator Representative Contango Resources, LLC Contango Resources, LLC 1717 South Boulder, Suite 900 Tulsa, OK 74119 Phone: 918-392-3396 Inventory ID API Well No Lease Name Well ID OS5749010 ORU 3A NE 32 24N 08E Status Inactive Well Type Enhanced Recovery 36.513952 Longitude -96.46357 Inspection Reason Inspect No. Plugging Witnessed Casing 5.5 Responsible Company at Time of Inspection Date Last MIT 06/23/2020 Tubing Contango Resources, LLC Last Test Fail Result USDW Monitoring N Device Elected Monitoring Device FLM Canister Pressure Tubing Fittings N Actual Pressure Annulus N AUTHORIZED Max Pressure 565 Max Volume 15000 Lease Status Active Determined? Max Inj Units Barrels Per Month Barrel Monitor N Hooked Up? Static Fluid Level Barrel Fluid Level (%) Determined? Flowline Hooked N Injection Rate Up? (bpd) Injecting N Inspection Comments Orr Energy Services perforated well OS5749010 on 9/12/2025 at 429 feet below the surface. Orr spotted the working string at 429 feet below surface and circulated cement to surface, then pulled the tubing from the well. Orr connected to the 5.5-inch casing and squeezed 140 sacks of cement to the surface inside the 8 5/8-inch surface casing. All plugging activity was completed in accordance with the EPA approved plugging plan. Inspector Signature MATTHEW ALLEN Date: 2025.09.25 15:09:53 -05'00' Digitally signed by MATTHEW ALLEN Supervisor Signature JEANNE ECKHART Date: 2025.09.26 07:08:45 -05'00' Digitally signed by JEANNE ECKHART Contango Resources, LLC/Osage Roe Unit (OS5749010) (UIC) Inspection Date: 09/15/2025 Appendix 1 Photograph Log 1 Photo UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Photograph Log Location: 36.513952, -96.46357 City: Hominy Photo No. 1 County/Parish: Osage State: Oklahoma Photo File Name: R0010750 Orientation: NW Date of Photo: 9/15/2025 Time of Photo: 12:13 PM Latitude: 36.513952 Longitude: -96.46357 Photographer: Matthew Allen Description: This was well OS5749010 at the time of the inspection with cement circulating to the surface.