Operated by MPLX1 - Red Wash 24B Gas Plant Full Compliance Evaluation (FCE) On-Site Inspection Inspection Date: March 23, 2023 Inspection Report Date: April 25, 2023 EPA Representatives: Colin LeCortz, Environmental Scientist, US EPA Region 8 Michael Stovern, Environmental Scientist, US EPA Region 8 Christine Tokarz, FIFRA Inspector, US EPA Region 8 Tribal Representatives: Mike Natchees Monaco Weidner Alverna Nelson Mariko Blackbird Company Representatives: Joshua Hirschi Megan Horrocks Mike Trogstad Inspection Report Prepared By: Colin LeCortz, Environmental Scientist, US EPA Region 8 Inspection Report Reviewed By: Last Inspection: Scott Patefield, Manager, Enforcement and Compliance Assurance Division, Air and Toxics Enforcement Branch Digitally signed by SCOTT SCOTT PATEFIELD PATEFIELD Date: 2023.04.27 07:29:18 -06'00' July 13, 2016 Operating Status: Shut-in/ Not actively operating Applicable Requirements: Title V 40 CFR Part 60, Subpart JJJJ: Standards of Performance for New Stationary Spark Ignition Internal Combustions Engines (NSPS JJJJ) 40 CFR Part 60, Subpart OOOOa: Standards of Performance for Crude Oil and Natural Gas Facilities for Which Construction, Reconstruction or Modification Commenced After September 18, 2015 (NSPS OOOOa) 40 CFR Part 63, Subpart ZZZZ: National Emissions Standards for Hazardous Air Pollutants for Stationary Reciprocating Internal Combustion Engines (MACT ZZZZ) 40 CFR Part 68, Chemical Accident Prevention Permit Number: V-UO-000001-2008.00 Replaces Permit No.: V-OU-0001-00.00 Issue Date: April 13, 2020 Effective Date: May 13, 2020 Expiration Date: May 13, 2025 1 Red Wash 24B Gas Plant is owned by Andeavor Field Services, LLC and operated by MPLX according to information in permit VUO-000001-2008.00. 1 Facility Information and Emission Unit Identification Parent Company Name: Mailing Address: Facility Contact: Facility Operator & Name: Facility Location: County, State: Reservation: Tribe: Responsible Official: SIC Code: AFS ID: Other CAA Permits: MPLX 1515 Arapahoe Street, Tower 1, Suite 1600, Denver, Colorado 80202 Joshua Hirschi, Environmental Engineer (435) 781-7489 MPLX - Red Wash 24B Gas Plant (Red Wash) Latitude 40.197, Longitude -109.281 Uintah, Utah Uintah and Ouray Indian Reservation Ute Indian Tribe James O.

REPORT OF COMPLIANCE SAMPLING INSPECTION (CSI) AT Augusta Wastewater Treatment Plant 101 SW Hwy 77 Augusta, KS 67010 NPDES NO: KS0094561 February 21-24, 2023 BY U.

Inspection Entry Date/Time Inspection Exit Date/Time Regulatory Program Type of Inspection EPA REGION 7 Enforcement Division INSPECTION REPORT 09/23/2024 09:23 AM (CT) Announced: No 09/23/2024 02:30 PM (CT) Access: Granted Resource Conservation and Recovery Act (RCRA) Compliance Evaluation Inspection (CEI) Facility or Site Name Facility/Site Identifier Facility/Site Physical Address City, State, Zip Code Generator Status NAICS Type of Operation Geographic Coordinates Pace Analytical Services LLC KSD984972992 9608 Loiret Blvd Lenexa, KS 66219 Large Quantity Generator (LQG) 54138 Wide range of environmental testing, wet chemistry, metal and organic testing. 38.95427, -94.77021 Permit Number (If Applicable) Not Applicable Lead Inspector: Tiffany DeLong TIFFANY D[SEigLnOatNurGe] Digitally signed by TIFFANY DELONG Date: 2024.11.01 13:14:59 -05'00' EPA REGION 7 delong.tiffany@epa.gov [Date] (913) 551-7729 Supervisor Review: Amber Whisnant AMBER WHISNANT [Signature] Digitally signed by AMBER WHISNANT Date: 2024.11.25 00:59:56 -06'00' EPA REGION 7 whisnant.amber@epa.gov [Date] SECTION I - INTRODUCTION Site Entry and Purpose of the Inspection Type of inspection: CEI At the request of the Enforcement Compliance and Assurance Division, I conducted a RCRA unannounced CEI at Pace Analytical Services (the "Site", "Facility", "Pace", "Pace Analytical"), located at 9608 Loiret Boulevard, Lenexa, Kansas, at 9:23 a.m.

REPORT OF COMPLIANCE EVALUATION INSPECTION at Guthrie Center Egg Farm Guthrie Center, Iowa 50115 NPDES PERMIT NUMBER: IA-0075361 September 19-20, 2022 BY U.

REPORT OF RCRA COMPLIANCE EVALUATION INSPECTION At JOHN DEERE DES MOINES WORKS 825 SW Irvinedale Drive Ankeny, Iowa 50023 515-289-3445 EPA ID Number: IAD069624500 On April 02, 2024 By TOEROEK ASSOCIATES, INC.

U.S.

UTAH DEPARTMENT OF TRANSPORTATION (UDOT) MUNICIPAL SEPARATE STORM SEWER SYSTEM (MS4) PROGRAM AUDIT REPORT Remote Audit Dates: March 1-2, and 16, 2023 Field Site Visit Dates: March 6-9, 2023 Report Date: August 2, 2023 Enforcement and Compliance Assurance Division U.S.

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION 8 1595 Wynkoop Street Denver, CO 80202-1129 Phone 800-227-8917 www.epa.gov/region08 Ref: 8ENF-W-NW SENT VIA EMAIL DIGITAL READ RECEIPT REQUESTED Justin Yellow Horse Maintenance City Worker City of McLaughlin mclughsd@heartlandpower.org Re: Inspection Report for the City of McLaughlin Wastewater Treatment Facility, NPDES Permit No.

Ref: 8WD-SDB February 19, 2024 SENT VIA EMAIL Lori Koldenhoven, Manager Crooked Creek Guest Ranch 76 Fir Road Dubois, Wyoming 82513 crookedcreekguestranch@gmail.com Re: Notice of Noncompliance Revised Total Coliform Rule Failure to Monitor (Routine Sample) PWS ID# WY5601542 NC Dear Lori Koldenhoven: The purpose of this letter is to inform you that Crooked Creek Guest Ranch has failed to conduct the required monitoring for total coliform bacteria by not submitting at least 1 sample per month.

Ref: 8WD-SDR February 3, 2025 SENT VIA EMAIL DIGITAL DELIVERY RECEIPT REQUESTED Mike Neufer South Big Horn County Joint Powers Board P.O.

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION 8 1595 Wynkoop Street Denver, CO 80202-1129 Phone 800-227-8917 www.epa.gov/region8 Ref: 8WD-SDB January 18, 2024 SENT VIA EMAIL Mr.

Ref: 8WD-SDR December 23, 2024 SENT VIA EMAIL DIGITAL READ RECEIPT REQUESTED Philip Wong, Civil Engineer BTNF-Station Creek CG 340 North Cache Street Jackson, Wyoming 83001 philip.wong@usda.gov Re: Notice of Noncompliance Revised Total Coliform Rule Failure to Complete Corrective Action from Level 2 Assessment PWS ID# WY5680135 NC Dear Philip Wong: The purpose of this letter is to inform you that BTNF-Station Creek CG has failed to complete the corrective action specified during your May 29, 2024, Level 2 Assessment as required by 40 C.F.R. 141.859-141.860 of the National Primary Drinking Water Regulations (NPDWR).

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION 8 1595 Wynkoop Street Denver, CO 80202-1129 Phone 800-227-8917 www.epa.gov/region8 Ref: 8WD-SDB November 26, 2023 SENT VIA EMAIL Mr.

UNITED STATES UNITED STATES ENVIRONMENTAL PROTECTION AGENCY ENVIRONMENT AGENCY!

UNITED * STA TESR UNIE TEDG STI ATEO S EN NVI RON1 MEN TAL PROTECTION AGENCY AGENCYLaboratory Services and Applied Science Division North Chelmsford, Massachusetts 01863-2431 ENVIRONMENTI11 Technology Drive ENTAL PROTECTION Drafted Date:November 10, 2021 Finalized Date:December 9, 2021 Subject:Compliance Sampling Inspection Report Clean Water Act - National Pollutant Discharge Elimination System City of Worcester, MA From:Michelle Coombs, Inspector/ MRC / Field Services Branch (FSB) Laboratory Services and Applied Science Division (LSASD) 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.