UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION III Four Penn Center - 1600 John F Kennedy Blvd Philadelphia, Pennsylvania 19103-2852 Report Title: Inspection Date(s): Regulatory Program(s): Clean Air Act Inspection of Panther Creek Generating Plant June 8, 2022 SIP, Title V, NESHAP, NSPS Company Name: Facility Name: Facility Location: Latitude: County/Parish: Stronghold Digital Mining Panther Creek Generating Plant 4 Dennison Road Nesquehoning, PA 18240 40.855556 Carbon Longitude: -75.877222 AFS Number: Permit Number: NAICS Code: Unique Project #: PA000475620 13-00003 221112 3EA22CA081A SIC: 4911 Facility Representatives: Cliff Heistand, EHS Manager Phone: 610-741-3883 Contact: Matt Cochran, Asset Manager Phone: 862-222-6525 Contact: Craig Lutz, Senator Argall's Office Phone: 454-332-3393 Contact: Point of Contact cheistand@panthercreekenergy.com matt.cochran@strongholdigitalmining.com clutz@pasen.gov EPA Inspectors: Bruce Augustine, Environmental Scientist, 3ED21 Phone: 215-814-2131 Contact: augustine.bruce@epa.gov State/Local Inspectors: Robert Mullin, Air Quality Specialist, PADEP NERO Phone: 610-861-2152 Contact: rmullin@pa.gov EPA Lead Inspector Signature Supervisor Signature BRUCE Digitally signed by BRUCE AUGUSTINE AUGUSTINE 15:41:19 -04'00' Date: 2022.07.13 Bruce Augustine Four Penn Center - 1600 John F Kennedy Blvd (3ED21) Philadelphia, PADig1ita9ll1y s0ig3n-e2d b8y52 KRISTEN KRISTEN HALL HALL Date: 2022.07.13 13:48:26 -04'00' Kristen Hall Table of Contents Date Date Section Page I Introduction............................................................................ 3 A Summary of the Facility.................................................................................. 3 B Inspection Opening Conference...................................................................... 4 II Site Activity/Process Information.................................................................... 4 III Observations.................................................................................................... 5 IIII Records Review............................................................................................... 7 V Closing Conference......................................................................................... 9 VI List of Attachments.......................................................................................... 10 Unique Project #: 3EA22CA081A Page 2 of 10 I.

Cities Service Highway Westlake, LA 70669 Calcasieu 30.191197, -93.325753 337-476-7451 Todd McLane todd.a.mclane@us.indorama.net Senior Manager, Environmental FRS Number: Identification/Permit Number: Media Identifier Number: NAICS: SIC: 110000748040 LDEQ Agency Interest Number 5337 AFS # 22-019-00107 325199 - All Other Basic Organic Chemical Manufacturing 2869 - Industrial Organic Chemicals Personnel participating in inspection: James Haynes EPA Region 6, Air Toxics Enforcement Colleen McCarthy EPA Region 6, Air Toxics Enforcement Jon Morris Providence Photonics Michael Morris Providence Photonics Hayden Guidry Indorama Ventures Olefins Damian Fryoux Indorama Ventures Olefins Todd McLane Indorama Ventures Olefins Physical Scientist Life Scientist EPA Contractor EPA Contractor Environmental Air Specialist Environmental Manager Senior Manager, Environmental EPA Lead Inspector Signature/Date JAMES HAYNES Date: 2023.01.27 13:21:13 -06'00' Digitally signed by JAMES HAYNES James Haynes Date Supervisor Signature/Date JAMES LEATHERS Date: 2023.01.27 16:10:56 -06'00' Digitally signed by JAMES LEATHERS James Leathers Date 6ENFORM-019-R8.2 (02/12/2020) 1 EPA Inspection Report - Page 2 of 19 Indorama Ventures Olefins, LLC/Lake Charles Facility Inspection Date 08/05/2022 Section I - INTRODUCTION PURPOSE OF THE INSPECTION I, James Haynes, U.S.

Longitude: -77.006885 AFS Number: Permit Number: NAICS Code: Unique Project #: DC0000001100100011 017-R3-A1 62331 3E23CA018A SIC: 8059 Facility Representatives: Susan Bryhan, Administrator Phone: 202-541-7534 Contact: Susan.Bryhan@afrh.gov Troy Phillips, Facilities Maintenance Project Manager Phone: 202-437-5119 Contact: N/A Sunhee Park, EA Engineering Phone: 443-765-1234 Contact: spark@eaest.com Patrick Benjamin, Campus Operations Phone 202-445-0513 Contact: Patrick.Benjami@afrh.gov EPA Inspectors: Carly Joseph, Air Inspector & Compliance Officer, 3ED21 Phone: 215-814-2127 Contact: Joseph.Carly@epa.gov Kim Laufenberg, Air Inspector & Compliance Officer, 3ED21 Phone: 215-814-2265 Contact: Laufenberg.Kim@epa.gov State/Local Inspectors: Atakilti Tesfai, Environmental Engineer, DOEE Phone: 202-671-5139 Contact: Tesfai.Atakilti@dc.gov Ryan Insley, Environmental Engineer, DOEE Phone: 202-400-0701 Contact: Ryan.Insley@dc.gov Joseph, Digitally signed by Joseph, Carly EPA Lead Inspector Carly Date: 2023.03.22 11:24:34 -04'00' Signature Carly Joseph EPA Region III Environmental Center- Suite 5350 701 Mapes Rd (3ED21) Ft.

The EPA-lead ISGP CEI of the WEC facility occurred on Tuesday, September 12, 2023, from approximately 9:00 a.m. - 2:10 p.m., immediately preceding the ISGP recon inspection of the SSI Facility.

The investigation conducted by the National Transportation Safety Board ("NTSB") determined the crash was caused by an electrical insulation failure leading to a short circuit and detonation of a fuel tank.

This was an EPA lead inspection. 8) Previous Inspection History NCDEQ and EPA conduct a RCRA CEI at the subject facility every fiscal year and have noted only three potential violations since 1998. 9) Facility Description UNC Chapel Hill is a multidisciplinary research university that has been in operation since 1795.

This was an EPA lead inspection. 8) Facility Description Channel Chemical Corporation is located at 14373 Seaway Road in Gulfport, Mississippi, Harrison County.

This was an EPA lead inspection. 8) Previous Inspection History The last RCRA compliance evaluation inspection was performed at the facility on August 9, 2017 by MDEQ personnel.

This was an EPA lead inspection. 8) Previous Inspection History On February 26, 2019, representatives of the SCDHEC inspected Hubbell Power Systems, Inc. and reported three deficiencies, which were corrected during the inspection. 9) Facility Description Hubbell Power Systems, Inc.

This was an EPA lead inspection. 8) Facility Description SPC is a nine-acre facility with two manufacturing buildings located on two contiguous properties located at 1 Commerce Boulevard and 3 Commerce Boulevard under one EPA ID Number.

Pretreatment Program Evaluation Report City of Sheridan POTW WY-0020100 Sheridan, Wyoming November 7, 2023 Prepared by: Al Garcia, Pretreatment Coordinator U.S.

EPA Inspection Report - Page 1 of 19 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) County/Parish: Facility Coordinates 08/04/2022 Air Title V CAA Louisiana Integrated Polyethylene JV, LLC Louisiana Integrated Polyethylene JV 2201 Old Spanish Trail Westlake, LA 70669 Calcasieu 30.24502, -93.27563 Facility Phone Number: Facility Contact: Megan Leger Environmental Manager Megan.leger@lyondellbasell.com FRS Number: Identification/Permit Number: Media Identifier Number: NAICS: SIC: 110070879384 LDEQ AI 226602 LA0000002201900514 325110 N/A Personnel participating in inspection: James Haynes EPA Region 6, Air Toxics Enforcement Colleen McCarthy EPA Region 6, Air Toxics Enforcement Dan Hoyt EPA OECA, Air Enforcement Division Jon Morris Providence Photonics Michael Morris Providence Photonics Megan Leger Louisiana Integrated Polyethylene JV Beau Mixon Louisiana Integrated Polyethylene JV Ashton Singletary Louisiana Integrated Polyethylene JV Physical Scientist Life Scientist Environmental Engineer EPA Contractor EPA Contractor Environmental Manager Environmental Engineer Environmental Engineer EPA Lead Inspector Signature/Date JAMES HAYNES Date: 2023.01.27 13:27:42 -06'00' Digitally signed by JAMES HAYNES James Haynes Date Supervisor Signature/Date JAMES LEATHERS Date: 2023.01.27 16:51:02 -06'00' Digitally signed by JAMES LEATHERS James Leathers Date 6ENFORM-019-R8.2 (02/12/2020) 1 EPA Inspection Report - Page 2 of 19 Louisiana Integrated Polyethylene Joint Venture Inspection Date 08/04/2022 Section I - INTRODUCTION PURPOSE OF THE INSPECTION I, James Haynes, U.S.

Yearly sampling and reporting are required for total recoverable lead, total recoverable zinc, and total recoverable aluminum.

March 28, 2024 Scott Campbell South Alabama Materials, Inc. 8 East Quintette Road Cantonment, Florida 32533 scott.campbell@acs-office.com Dear Mr.

MOD007121841 123 West 23rd Avenue North Kansas City, MO 64116 Clay Large Quantity Generator (LQG) 32551 Paint and coating manufacturing. 39.145149, -94.581343 Permit Number (If Applicable) Not Applicable Lead Inspector: Mike Martin [Signature] Martin, Mike Digitally signed by Martin, Mike [Date] Date: 2024.11.19 17:21:56 -06'00' EPA REGION 7 martin.mike@epa.gov Additional Inspectors Participating in Inspection: Name Title Organization Email Donald Melton Inspector EPA REGION 7 melton.donald@epa.gov Crew Schuster Inspector Missouri Department of crew.schuster@dnr.mo.gov Natural Resources (MoDNR) Supervisor Review: Amber Whisnant [Signature] AMBER Digitally signed by AMBER WHISNANT WHISNANT 14:25:38 -06'00' Date: 2024.12.20 EPA REGION 7 whisnant.amber@epa.gov [Date] Inspection Date(s): 10/29/2024 SECTION I - INTRODUCTION Site Entry and Purpose of the Inspection Type of inspection: CEI At the request of the Enforcement and Compliance Assurance Division, I conducted a RCRA CEI at Tnemec Company, Inc.