Region 6 - Enforcement & Compliance Assurance Division INSPECTION REPORT Inspection Date(s): Media Program: Regulatory Program(s) 04/15/2025 Water (CWA) Water (CWA) Brine Program (Oil & Gas inspection) Company Name: Facility Name: Facility Physical Location: (city, state, zip code) Mailing address: (city, state, zip code) County/Parish: Facility Phone Number Facility Contact: Enerco Operating Corporation Clark Tank Battery Off County Road 249 at 33.320769, -93.813836 Genoa, AR 71840 11535 East Ricks Circle Dallas, TX 75230 Miller County 870-953-0287 Terry Collum Field Supervisor terrycollum@enercooperating.com FRS Number: Identification/Permit Number: Media Identifier Number: NAICS: SIC: N/A ARU002311 N/A 211111 1311 Personnel participating in inspection: Uma Lad EPA / Region 6 ECDW Kerri McCabe EPA / Region 6 ECDW Michael Blaha EPA / Region 6 ECDW Inspector / Enforcement Officer Inspector / Enforcement Officer Inspector / Enforcement Officer EPA Lead Inspector Signature/Date UMA LAD Uma Lad Digitally signed by UMA LAD Date: 2025.06.09 14:13:19 -05'00' Date Supervisor Signature/Date JEANNE ECKHART Date: 2025.06.10 14:34:19 -05'00' Digitally signed by JEANNE ECKHART Jeanne Eckhart Date 6ENFORM-019-R8.2 (02/12/2020) 1 Enerco Operating Corporation / Clark Tank Battery (ARU002311 / CWA) Inspection Date 04/15/2025 Section I - INTRODUCTION PURPOSE OF THE INSPECTION Environmental Protection Agency (EPA) Region 6 inspectors Uma Lad, Kerri McCabe, and Michael Blaha arrived at the Enerco Operating Corporation / Clark Tank Battery, located off County Road 249 at 33.320769, -93.813836, at 5:30 PM on 04/15/2025 for an unannounced inspection.

REGION 6 DA LLAS, TX 752 70 December , 2025 TRANSMITTED VIA E-MAIL Mr.

Inspection Report Mechanical Integrity Test Osage DNR / Environmental Protection Agency 1201 Elm Street, Suite 500 Dallas TX 75270 Inspector Matthew Allen MIT Date 10/02/2025 Operator Representative Ceja Corporation Report Sent Operator Inject Interval 3312 - 3338 USDW 265 Annulus Fluid Type Casing 5.5 Concentric Pkr Tubing Time 09:15 Well Type Packer Depth Enhanced Recovery 2776 Operator Info Ceja Corporation 1437 South Boulder, Suite 1250 Tulsa, OK 74119 Phone: 918-496-0770 Inventory ID API Well No Lease Name Well ID Location OS0103000 3 NE 06 25N 05E Type of MIT Ada Pressure Test Injecting N Injection Rate (bpd) MIT Due Time Pre-Test Tubing Pressure 0 Annulus Pressure 300 Initial 09:30 1200 300 Mid 09:45 1200 300 Final 10:00 1200 300 MIT Freq Test Reason Routine Tubular Lining EVERY FIVE YEARS Flowback Pressure Ann Filled (hrs) Ann Press Mont Volume High Mid Low 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 3312 Depth to Fluid Level 313 Fluid Column Level 2999 Specific Gravity of Fluid 1.06 Nitrogen Weight Factor 1.11 Required Pressure Test 1240 Fluid Migration Test Type Inspection Comments Inspector Signature Remedial Action Type Remedial Action Type Well, OS0103000 achieved an acceptable test pressure of 1200psig and maintained the pressure for the duration of the required 30-minute observance period.

Region 6 - Enforcement & Compliance Assurance Division INSPECTION REPORT Inspection Date(s): Media Program: Regulatory Program(s) 12/03/2025 Water (CWA) Water (CWA) Brine Program (Oil & Gas inspection) Company Name: Facility Name: Facility Physical Location: (city, state, zip code) Mailing address: (city, state, zip code) County/Parish: Facility Phone Number Facility Contact: ArklaTx Operating Company, Inc.

Region 6 - Enforcement & Compliance Assurance Division INSPECTION REPORT Inspection Date(s): Media Program: Regulatory Program(s) 05/22/2024 Water (CWA) Water (CWA) Industrial Stormwater Program Company Name: Facility Name: Facility Physical Location: (city, state, zip code) Mailing address: (city, state, zip code) County/Parish: Facility Phone Number Facility Contact: MidAmerica Environmental Holdings, LLC USA Disposal - El Dorado 101 Warehouse Drive El Dorado, AR 71730 4101 Old Oak Drive Little Rock, AR 72212 Union County 501-404-2020 Kirk Brown (318-773-3852) Director of Operations Kirk.brown@trekkerenergy.com FRS Number: Identification/Permit Number: Media Identifier Number: NAICS: SIC: N/A ARR001445; ADEQ AFIN 70-01210 for the facility N/A 213112 1389 Personnel participating in inspection: Kerri McCabe EPA / Region 6 ECDW Michael Young ADEQ / Office of Water Quality Kirk Brown Trekker Energy Services Cody Eubanks MidAmerica Environ.

FILED 31 JAN 25 PM 03:44 REGIONAL HEARING CLERK EPA REGION 6 REGION 6 DA LLAS, TX 75270 1/31/2025 SENT BY ELECTRONIC MAIL alicia@chameleonindustriesinc.com Alicia Russell Chameleon Industries, Inc. 313 South Bryan-Beltline Road Mesquite, Texas 75185 Re: Notice of Warning for Late/Non-Reported Pesticide Production Reports EPA Docket No.

FILED UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 09 NOV 23 PM 01:43 REGION 6 1201 Elm Street, Suite 500 REGIONAL HEARING CLERK EPA REGION 6 Dallas, Texas 75270 In the Matter of Silvcrcot, Inc., Respondent.

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION 6 DALLAS, TEXAS FILED 09 APR 25 PM 02:04 REGIONAL HEARING CLERK EPA REGION 6 In the Matter of Dalmex, Ltd., Laredo, Texas Respondent.

VIA E-MAIL: auksae@enftech.com July 11, 2024 Jusoung Lee ENF Kyle Technology 1550 Kohlers Crossing Kyle, Texas 78640 Re: No Further Action Concerning the 2021 Biennial Report Submission at the ENF Kyle Technology facility located at 1550 Kohlers Crossing, Kyle, Texas 78640.

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION 6 DALLAS, TEXAS 75270 FILED 17 SEP 25 AM 11 :30 REGIONAL HEARING CLERK EPA REGION 6 In the Matter of Holt Trucking Centers of Oklahoma Respondent.

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION 6 DALLAS, TEXAS FILED 12 JAN 26 PM 05:17 REGIONAL HEARING CLERK EPA REGION 6 In the Matter of Smitty's Supply, Inc.

TRANSMITTED VIA EMAIL RETURN RECEIPT REQUESTED Puneet Bhatnagar Gujarat Fluorochemicals Americas LLC 1212 Corporate Dr., Suite-540 Irving, TX 75038-2502 puneet@gflamericas.com Re: Clean Air Act Information Request for Gujarat Fluorochemicals Americas LLC Dear Mr.

Report Date: Clean Air Act Inspection Report December 10, 2024 I.

Clean Air Act Inspection Report I.

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION 1 Laboratory Services and Applied Science Division 11 Technology Drive North Chelmsford, Massachusetts 01863-2431 Drafted Date: Finalized Date: September 1, 2021 October 22, 2021 Subject: Reconnaissance and Sampling Inspection Report Clean Water Act - National Pollutant Discharge Elimination System (NPDES) City of Lynn, MA From: Michelle Coombs, Inspector Field Services Branch (FSB) Laboratory Services and Applied Science Division (LSASD) \MRC\ Reviewed By: Jerome Keefe, Investigations Team Leader, LSASD-FSB \JCK\ To: Denny Dart, Water Compliance Section Chief, Enforcement and Compliance Assurance Division (ECAD-EWC) CC: Douglas Koopman, Inspector, ECAD-EWC I.