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IXM MANUFACTURING PROCESSES POLYMERS STACK EMISSIONS TEST REPORT TEST DATES: 25-26 SEPTEMBER 2019

THE CHEMOURS COMPANY FAYETTEVILLE, NORTH CAROLINA

Proposed Consent Order Attachments Signatures 2019-02-25

SEDIMENT CHARACTERIZATION REPORT

This report was prepared by Geosyntec Consultants of NC, P.C. (Geosyntec) for The Chemours Company, FC, LLC (Chemours) pursuant to Paragraph 11.2 of the executed Consent Order (CO) dated 25 February 2019 among the North Carolina Department of Environmental Quality (NCDEQ), Cape Fear River Watch (CFRW), and the Chemours Company FC, LLC (Chemours)

CAPE FEAR RIVER PFAS MASS LOADING ASSESSMENT – FIRST QUARTER 2023

Geosyntec Consultants of NC, P.C. (Geosyntec) has prepared this Cape Fear River PFAS Mass Loading Assessment - First Quarter 2023 Report for The Chemours Company, FC, LLC (Chemours).

Appendix A Cape Fear River PFAS Mass Loading Model

The objective of this appendix is to estimate the mass discharge from the identified PFAS transport pathways using a Cape Fear River mass loading model developed and described in the Cape Fear River Mass Loading Calculation Protocol Version 2 (Geosyntec, 2020a) and to assess the relative contributions by pathway.

CHARACTERIZATION OF PFAS IN PROCESS AND NON-PROCESS WASTEWATER AND STORMWATER Quarterly Report #5

This report was prepared by Geosyntec Consultants of NC, P.C. (Geosyntec) for The Chemours Company FC, LLC (Chemours) to provide a quarterly update on the identification and concentrations of per- and polyfluoroalkyl substances (“PFAS”) in process wastewater, non-process wastewater, and stormwater at the Chemours Fayetteville Works, North Carolina site (the Facility, Figure 1)

CAPE FEAR RIVER PFAS MASS LOADING ASSESSMENT – FIRST QUARTER 2024

Geosyntec Consultants of NC, P.C. (Geosyntec) has prepared this Cape Fear River PFAS Mass Loading Assessment - First Quarter 2024 Report for The Chemours Company, FC, LLC (Chemours).

Interim SEEP Remediation Operation and Maintenance Report #9

This Operations and Maintenance Report #9 (O&M Report #9) has been prepared to document the operations, maintenance, and performance of the flow-through cells at Seeps A, B, C, and D from May 1 through June 30, 2022.

Lancaster TB6 SOP redacted June 2020

T-PFAS-WI32768

Q4 2020 Mass Load Assessment Appendices

This appendix summarizes the field methods employed to conduct monitoring activities for total per- and polyfluoroalkyl substances (PFAS) mass loading to the Cape Fear River at and surrounding the Chemours Fayetteville Works, North Carolina site (the Site).