Pretreatment Audit Report Cheyenne Board of Public Utilities Pretreatment Audit Report WY-0022934 and WY-0022381 Cheyenne, Wyoming March 10, 2025 to March 13, 2025 Prepared by: Al Garcia, Pretreatment Coordinator U.S.

Pretreatment Audit Report Cheyenne Board of Public Utilities Pretreatment Audit Report WY-0022934 and WY-0022381 Cheyenne, Wyoming March 10, 2025 to March 13, 2025 Prepared by: Al Garcia, Pretreatment Coordinator U.S.

The occurrence of unavoidable and irreversible chain transfer/termination reactions leads to broad chain length distributions that are inactive with respect to further chain growth; effectively "dead" chains.

David Esparza, PE USEPA-ECDWM President Director- Regulatory Compliance Vice President-Pine Division Life Scientist Environmental Engineer EPA Lead Inspector Signature/Date DAVID ESPARZA Date: 2023.05.15 15:33:09 -06'00' Digitally signed by DAVID ESPARZA David Esparza Date Supervisor Signature/Date ROBERTO BERNIER Date: 2023.05.15 17:40:35 -05'00' Digitally signed by ROBERTO BERNIER Roberto Bernier Date 6ENFORM-020-R8.2 (02/12/2020) 1 Section I - INTRODUCTION Anthony Timberlands/Bearden Permit # ARR00B472 Inspection Date 03/09/2023 PURPOSE OF THE INSPECTION United States Environmental Protection Agency (EPA) Region 6 inspectors David Esparza, PE, and Ms.

David Esparza, PE USEPA-ECDWM President Director- Regulatory Compliance Vice President-Pine Division Life Scientist Environmental Engineer EPA Lead Inspector Signature/Date DAVID ESPARZA Date: 2023.05.15 15:33:09 -06'00' Digitally signed by DAVID ESPARZA David Esparza Date Supervisor Signature/Date ROBERTO BERNIER Date: 2023.05.15 17:40:35 -05'00' Digitally signed by ROBERTO BERNIER Roberto Bernier Date 6ENFORM-020-R8.2 (02/12/2020) 1 Section I - INTRODUCTION Anthony Timberlands/Bearden Permit # ARR00B472 Inspection Date 03/09/2023 PURPOSE OF THE INSPECTION United States Environmental Protection Agency (EPA) Region 6 inspectors David Esparza, PE, and Ms.

*UBS Global Research and Evidence Lab 6 July 2023 Q-Series How will tightening 'forever chemicals' (PFAS) regulation impact the manufacturing sector?

Strong natural gas leads to energy security, which creates a strong United States of America.

SocioEconomic Analysis of a potential REACH Restriction on Fluoropolymers TeflonTM Perfluoro Alkoxy Revised Final Report prepared for APM division of Chemours 21 June 2023 SocioEconomic Analysis of a potential REACH Restriction on Fluoropolymers TeflonTM Perfluoro Alkoxy June 2023 Revised Final Report Quality Assurance Project reference / title Report status Author(s) Approved for issue by Date of issue J1170/SEA for Chemours APM Final Draft Report Charles James Julianne Oakley Robert White David Carlander 9 December 2022 9 June 2023, revised Final Draft 21 June 2023 Final report Document Change Record Report Version Final Draft 2.0 Final Draft 3.0 Final revised 4.0 Final Revised report 4.1 Date 16 September 2022 9 December 2022 9 June 2023 21 June 2023 Change details Comments addressed from APM, remaining sections of the report have been completed including downstream user impact assessment Additional comments addressed.

EUROPEAN COMMISSION DIRECTORATE-GENERAL JOINT RESEARCH CENTRE Directorate B - Growth and Innovation Circular Economy and Industrial Leadership Ref.

Department of Energy NNSA Program Manager X X Jennifer Griffin Triad National Security, LLC NPDES Industrial and Sanitary Outfalls Program Lead X X Aaron Dailey Triad National Security, LLC Team Lead - Water Quality X X Sarah Holcomb Triad National Security, LLC EPC-CP Group Leader X X Steve Story Triad National Security, LLC EPC Division Leader X Katie Higgins Triad National Security, LLC EPC Deputy Division Leader X 1 - Personnel in attendance at Opening Conference 2 - Personnel in attendance at Closing Conference EPA Lead Inspector Signature/Date Amy Andrews Date Supervisor Signature/Date Roberto Bernier Date 6ENFORM-020-R8.2 (02/12/2020) 1 TABLE OF CONTENTS Section I - INTRODUCTION ...................................................3 Purpose of the Inspection .................................................3 Facility Description............................................................4 Outfall 001 & SERF Description..........................................5 Outfall 13S & SWWS Description.......................................5 Outfall 051 & RLWTF Description ......................................6 Outfall 03A022 Description ...............................................7 Outfall 03A027 Description ...............................................7 Outfall 03A048 Description ...............................................7 Outfall 03A113 Description ...............................................8 Outfall 03A160 Description ...............................................8 Outfall 03A181 Description ...............................................8 Outfall 03A199 Description ...............................................8 Outfall 05A055 Description ...............................................9 Section II - OBSERVATIONS ..................................................9 General Programmatic Observations.................................9 Outfall 001 & SERF Observations.....................................10 Outfall 13S & SWWS Observations ..................................11 Outfall 051 & RLWTF observations ..................................12 Outfall 03A022 Observations...........................................12 Los Alamos National Laboratory - NM0028355 Inspection Date 09/09-12/2024 Outfall 03A027 Observations ..........................................13 Outfall 03A048 Observations ..........................................13 Outfall 03A113 Observations ..........................................13 Outfall 03A160 Observations ..........................................13 Outfall 03A181 Observations ..........................................14 Outfall 03A199 Observations ..........................................14 Outfall 05A055 Observations ..........................................14 Section III - AREAS OF CONCERN........................................14 Requirement 1 ...........................................................14 Concern 1...................................................................14 Requirement 2 ...........................................................15 Concern 2A.................................................................15 Concern 2B.................................................................15 Requirement 3 ...........................................................15 Concern 3...................................................................16 Requirement 4 ...........................................................16 Concern 4...................................................................16 Requirement 5 ...........................................................16 Concern 5...................................................................16 Section IV - FOLLOW UP.....................................................16 LIST OF APPENDICES Appendix 1 - Photograph Log - 19 photos taken by permittee on various dates Appendix 2 - Process Flow Diagrams for each outfall and treatment plant LIST OF ACRONYMS CWA Clean Water Act (CWA DOE United States Department of Energy EPA Environmental Protection Agency HE high explosives HEWTF High Explosive Wastewater Treatment Facility LANL Los Alamos National Laboratory LANSCE Los Alamos Neutron Science Center LDCC Laboratory Data Computing Center LEDA Low Energy Demonstration Accelerator LLW low-level (radioactive) waste MES mechanical evaporation system MW Mega Watt NHMFL National High Magnetic Field Laboratory NMAC New Mexico Administrative Code NMED New Mexico Environment Department NNSA PLC RLW RLWTF RO SCC SERF SET SMO SWQB SWWS TA TRU National Nuclear Security Administration programmable logic controller radioactive liquid waste Radioactive Liquid Waste Treatment Facility reverse osmosis Strategic Computing Center Sanitary Effluent Reclamation Facility Solar Evaporation Tanks Sample Management Office Surface Water Quality Bureau Sanitary Wastewater System Technical Area transuranic 2 Los Alamos National Laboratory - NM0028355 Inspection Date 09/09-12/2024 Section I - INTRODUCTION PURPOSE OF THE INSPECTION Environmental Protection Agency (EPA) Region 6 inspector, Amy Andrews, and New Mexico Environment Department (NMED)/ Surface Water Quality Bureau (SWQB) inspector, Shawnee Suazo, arrived at the Los Alamos National Laboratory (LANL) on September 9, 2024, for an announced inspection.

The CSS should therefore also be the basis for a sustainable and competitive, resilient chemicals sector and lead to an improvement in the competitive position of the European chemicals industry.

Attendees Organization EPA Region 5 EPA Region 5 Hannahville Indian Community Hannahville Indian Community Hannahville Indian Community Hannahville Indian Community Attendee Name Dean Maraldo Keith Middleton Roxanne Miller Kevin Moreau Steve Javurek Tom Broeders Title Lead Inspector Inspector Operator Operator Operator Operator Present in Opening Conf.

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Stephens, AR 71764 210 Jasper Street Stephens, AR 71764 Ouachita County 870-904-4719 Paul Bonds (870-904-4719) Person Responsible for Operation FRS Number: Identification/Permit Number: Media Identifier Number: NAICS: SIC: N/A ARU002287 N/A 211111 1311 Personnel participating in inspection: Kerri McCabe (lead) EPA / Region 6 ECDW Michael Blaha EPA / Region 6 ECDW Paul Bonds Bonds Company Production, LLC RJ (no last name provided) Bonds Company Production, LLC Inspector / Enforcement Officer Inspector / Enforcement Officer Person Responsible for Operation Pumper EPA Lead Inspector Signature/Date Supervisor Signature/Date KERRI MCCABE Kerri McCabe Digitally signed by KERRI MCCABE Date: 2025.05.29 13:08:34 -05'00' Date JEANNE ECKHART Date: 2025.05.29 15:56:19 -05'00' Digitally signed by JEANNE ECKHART Jeanne Eckhart Date 6ENFORM-019-R8.2 (02/12/2020) 1 Section I - INTRODUCTION Bonds Company Production, LLC / Curry Lease Tank Battery (ARU002287 / CWA) Inspection Date 03/05/2025 PURPOSE OF THE INSPECTION Environmental Protection Agency (EPA) Region 6 inspectors Kerri McCabe (lead) and Michael Blaha arrived at the Bonds Company Production, LLC / Curry Lease Tank Battery ("facility") located from State Highway 57, right on Ouachita County Road 79, left on oilfield road at 33.513497, -93.045767 in Stephens, Ouachita County, Arkansas; at 0945 on 03/05/2025 for an unannounced inspection.

MPs are designed to be robust materials, unlikely to break down within the lungs (Law et al., 1990), potentially leading to accumulation over time depending on aerodynamic diameter and respiratory defences (Prata, 2018).