AR226-2579 )Andrew's Hartten :-~----^JMI 0212712.QQ2'W:W W ^ To: co: Subject: M.

AR226-2583 Document 12 of 25 ASH018251 EID521411 I ^ I I I C-8 PLUME IDENTIFICAT10N/GROUNDWATER I ASSESSMENT WORK PLAN I DUPONT WASHINGTON WORKS FACILITY AND LOCAL, LETART AND I DRY RUN LANDFILLS I I I Dates May 2002 I Project No.; D6WW7423 I ^ I CORPORATE REMEDIATION GROUP An Alliance between DuPont and URS Diamond I Barley Mill Plaza, Building 27 Wilmington, Delaware 19805 I I I ASH018252 EID521412 I C-a Plums IdenflfledUon/GioundwatBr Assessment Wotk Plan __Introduction y TABLE OF CONTENTS 1.0 Introduction.......................................................................................................... 2 1.1 Document Organization..--......,........--........-,......--... .....,,..............,,..,,..-- ...,...3 1 2 . 12.0 Washingtoii Works Facility.....................................................................,.......,.,.,.4 Key Findings..............................................................................................4 2.2 Data Gaps,............................................................................................... ,.5 2.3 Summary--Recommended Activities to Fill Data Gaps.................................. 5 2.4 Detailed Justification..............................................................................6 1 1| H ^ 3 4 . . 3.0 Local LandfilL..................,.,..................,..,......................................-..........,.............8 KayFhldings.......................,,...................,...................,.................,..................,8 3.2 Summary--Recommended Activities to Fill Local Landfill Data Gaps ...........9 3.3 Detailed Justification................................................................................ 10 14.0 Letart Landfill...................................................................................................... 12 4.1 Key Findings--Letart Landfill.......................................................,...,,...,...12 Data Gaps for the Letart Landfill.........,................-...................,,.............,.....13 4.3 Summary--Recommended Activities to Fill Letart Landfill Data Gaps,.,......13 4.4 Detailed Justification .......,,,,.,,....................................................................14 25.0 Dry Run LandfiU...........................,.....,.....................................................-,.,...........16 5.1 Key Findings--Dry Run Landfill............................................................ 16 5.2 Summary--Data Gaps for the Dry Run Landfill............,,.,,,...............,.,,........]?

REACH PFAS Control Exemption Application for Refrigerants Submitter: Beijing Starget Chemicals Co.

2195 Front Street Loaan,OH43138 ONBER& State of Ohio Envirnitirtcntal PretctHun Agency Southeast District Office TELE: (740) 385-aSQI PAX; (740) 385.64BO AR226-2608 Bob Taft, Bovsrror Christopher Jones, DIrBctor July 8,2002 Mr.

AR226-2753 Copies Co Material Tested Uccanoic ac id, pentadecafluoro- , ammonium saic* E.

^(* AR226-2762 FOR DU FONT DSE ONLY Copies to: E.

Analysis of the most appropriate regulatory management options (RMOA) Substance Name: EC Number: CAS Number: Date: Poly- and perfluoroalkyl substances (PFAS) N/A N/A March 2023 ACKNOWLEDGEMENT This document was drafted in close partnership with the Environment Agency Page 1 of 192 DISCLAIMER With reference to the use of the information and data contained within this document, HSE, as the Agency for UK REACH makes the following disclaimer: The conclusions of this document have been compiled using information available at the time of writing.

Application for exemption from EU REACH PFAS control for PTFE microporous membranes Subject: Apply for a permanent exemption for PTFE microporous membranes Basis First, PTFE microporous membranes are widely used in chemical solution filtration in semiconductor manufacturing.

Fluoropolymers in Chemical and Industrial Processes Chemours as a user perspective August 15th, 2023 Page 1 of 21 Content Summary 3 Introduction: Uses and Functionality of Fluoropolymers in Chemical and 3 Industrial processes Chemours as a downstream user; practical examples of uses of 5 fluoropolymers in the chemical industry Other chemical and industrial processes 8 Alternatives 12 Socio-economic Impact 20 Conclusions 21 Page 2 of 21 Summary The chemical industry is of major importance for economic development and wealth, providing modern products and materials and enabling solutions in virtually all sectors.

Study Sponsor: Issue Date: Document Reference No.: ATOCHEM 2-NOV-87 98797 AR226-2933 Acute Toxicity to Daphnia Magna Author(s): A.M.

3M Please find attached 3M's comments on the Safer Products for Washington - Draft Report on Priority Consumer Products.

FOR DU PONT USE ONLY AR226-2954 Du Pont HLO 19-91 Study Title Skin Sensi'tizati'on Test w1t)fB|in Guinea Pigs Study Coinpleted On March 25. 1991 Contracting Laboratory Pharmakon Research International, Inc.

cowi1 24 August 2021 Cowie Technology Group Ltd Ridgeway, Coulby Newham Middlesbrough, TS8 0TQ England Tel: Fax: enquiries@cowie.com www.cowie.com Registered in England 850954 Kind attention: Mr.

Comment on Proposed Restriction of PFAS Aug 25, 2023 Japan Valve Manufactures' Association (JVMA) Japan Valve Manufacturers Association (JVMA) appreciates the opportunity to provide comments to the PFAS restriction proposal. 1.

CONFIDENTIAL AR226-3132 -J^/SJ 3^ DPT 443/984760 TOXICTTY STUDY BY ORAL ADMINISTRATION TO CD RATS FOR 4 WEEKS Sponsor DuPont Specialty Chemicals; Jackson Laboratory, Chambers Works, Deepwater, NJ 08023, U.S.A.