2021.05.28_CCOA.p.4d_WWTPAssessmentReport

WWTP TABLE 3+ PFAS LOADING
ASSESSMENT
Chemours Fayetteville Works
Prepared for
The Chemours Company FC, LLC 22828 NC Highway 87 Fayetteville NC 28306
Prepared by
Geosyntec Consultants of NC, P.C.
2501 Blue Ridge Road, Suite 430
Raleigh, NC 27607
Geosyntec Project Number TR0807E
May 2021
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5/28/2021

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TABLE OF CONTENTS
Executive Summary ....................................................................................................................... vi
1. Introduction ..........................................................................................................................1
2. Background ..........................................................................................................................2
2.1 Wastewater Characterization ......................................................................................3
2.1.1 Source Water ..................................................................................................3
2.1.2 Non-Contact Cooling Water (NCCW) ...........................................................4
2.1.3 Process Wastewater ........................................................................................4
2.1.4 Sanitary Wastewater .......................................................................................4
2.1.5 Stormwater .....................................................................................................4
2.2 Manufacturing Areas ..................................................................................................4
2.3 Wastewater Treatment Plant (WWTP) Configuration ................................................5
2.3.1 Current WWTP ..............................................................................................6
2.3.2 Future WWTP ................................................................................................6
3. Scope and Methods ..............................................................................................................7
3.1 Sampling Locations ....................................................................................................8
3.2 Sampling Events .........................................................................................................8
3.2.1 Initial Characterization of PFAS in Process and Non-Process Wastewater
Sampling ....................................................................................................................8
3.2.2 June 2020 WWTP Sampling Event ................................................................9
3.2.3 March and April 2021 WWTP Sampling Event ............................................9
3.2.4 April 2021 Kuraray Effluent Pipe Sampling ..................................................9
3.2.5 Analytical Methods, Sample Packing, Shipping, and Field QA/QC Samples
9
3.3 Stormwater Assessment ............................................................................................10
3.4 Mass Loading Assessment ........................................................................................11
4. Results ................................................................................................................................11
4.1 Data Quality ..............................................................................................................12
4.1.1 Table 3+ 17 Compounds ..............................................................................13
4.2 WWTP Table 3+ PFAS Concentration Summary ....................................................13
4.2.1 Dry Weather vs. Wet Weather .....................................................................14
4.3 WWTP Table 3+ PFAS Mass Loading Assessment .................................................15
5. Data Assessment ................................................................................................................16
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5.1 Source Types of Table 3+ PFAS to the WWTP .......................................................16
5.1.1 Chemours Monomers IXM and PPA Area Washing Machines ...................16
5.1.2 Historic Table 3+ PFAS ...............................................................................17
5.1.3 Stormwater Table 3+ PFAS .........................................................................17
5.1.4 Biosolids Table 3+ PFAS Desorption – Reservoir of PFAS ........................17
5.1.5 Potentially Limited Groundwater Intrusion .................................................17
5.2 Assessment of Loading Significance ........................................................................18
5.2.1 Primary Table 3+ PFAS Loadings to WWTP ..............................................18
5.2.2 Secondary Table 3+ PFAS Loadings to the WWTP ....................................19
5.2.3 Tertiary Table 3+ PFAS Loadings to the WWTP ........................................19
6. Proposed and Completed Remedial Actions ......................................................................19
6.1 Completed Action - Terracotta Pipe Replacement ...................................................19
6.2 Proposed Actions to be Completed ...........................................................................20
7. References ..........................................................................................................................21

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LIST OF TABLES
Table 1: Summary of Total Table 3+ Concentration Data
Table 2: Estimated Stormwater Concentrations in Areas Draining to the WWTP
Table 3: June 2020 and March to April 2021 Sampling Events Analytical Results
LIST OF FIGURES
Figure 1: Site Location Map
Figure 2: Process and Sanitary Sewer Network
Figure 3: Process and Sanitary Sewer Network Sampling Locations
Figure 4: Sanitary Sewer Network and Groundwater Elevations
Figure 5: Historical Process Sewer Network and Groundwater Elevations
LIST OF APPENDICES
Appendix A: Laboratory Analytical Data Review Narratives
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ACRONYMS AND ABBREVIATIONS
BOD5 5-day biochemical oxygen demand
CO Addendum Addendum to Consent Order Paragraph 12
DVM Data Verification Module
DQO Data Quality Objectives
EIM Environmental Information Management
ft feet
ft bgs feet below the ground surface
GPM gallons per minute
HDPE high-density polyethylene
HFPO-DA hexafluoropropylene oxide dimer acid
IXM Ion Exchange Membrane
MGD millions of gallons per day
ng/kg nanograms per kilogram
ng/L nanograms per liter
NCCW non-contact cooling water
NCDEQ North Carolina Department of Environmental Quality
P11 Consent Order Paragraph 11
PEPA perfluoroethoxypropyl carboxylic acid
PFMOAA perfluoro-2-methoxyacetic acid
PFAS per- and polyfluoroalkyl substances
PMDF Polymer Manufacturing Development Facility
PMPA perfluoromethoxypropyl carboxylic acid
PPA Polymer Processing Aid
PVF Polyvinylfluoride
RPD relative percent differences
QA/QC quality assurance/quality control
TAR turn-around
µg/s micrograms per second
WWTP wastewater treatment plant
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EXECUTIVE SUMMARY
This report was prepared by Geosyntec Consultants of NC, P.C. (Geosyntec) for The Chemours
Company FC, LLC (Chemours) pursuant to the requirements of Paragraph 4(d) of the Addendum
to Consent Order Paragraph 12 (CO Addendum) amongst Chemours, the North Carolina
Department of Environmental Quality (NCDEQ), and Cape Fear River Watch. Prior investigations
pursuant to Consent Order Paragraph 11 indicated elevated Table 3+ per- and polyfluoroalkyl
substances1 (PFAS) loadings at the wastewater treatment plant (WWTP) effluent (Location 8) and
particularly one upstream location of the WWTP (Location 23A) when compared to the Cape Fear
River intake water used at the facility at the Chemours Fayetteville Works, North Carolina site
(the Facility).
The Facility is managed by Chemours, who operate a fluoroproduct manufacturing division and
tenants Kuraray and DuPont operate separate manufacturing activities. The Kuraray and DuPont
manufacturing activities and Power area generate wastewaters which are directed to the Facility’s
WWTP. Chemours manufacturing areas (PPA, Monomers, and IXM) collect PFAS manufacturing
wastewater for offsite disposal and sanitary effluent is directed to the WWTP. With the exception
of Chemours manufacturing process wastewaters, process and sanitary wastewaters are conveyed
along process and sanitary wastewater conveyance networks to the WWTP. WWTP effluent is
discharged via Outfall 001. The WWTP is presently undergoing a series of modifications and
upgrades which will reduce the size of some of the equipment used.
Relying on data collected between April 2019 to April 2021 from two investigations focused on
identifying sources of PFAS to the WWTP in June 2020 and March 2021 and other
characterization investigations at the Facility, this assessment considered 193 sample results
collected from 40 locations. Sample types included stormwater, sanitary wastewater, and
combined non-process or non-contact cooling water (NCCW) and process wastewaters. Samples
were collected from Kuraray, DuPont, Power, and Chemours areas; the WWTP; and other support
areas at the facility. The measured concentrations from these samples were used to calculate a
Table 3+ PFAS mass discharge for the separate flow / loading types to the WWTP which was
compared to the median 2020 Cape Fear River Table 3+ PFAS mass discharge. The results of the
analysis are presented in the table below.

1 Table 3+ Method PFAS compounds are often related to operations at the Chemours Fayetteville Works Facility
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Dry Weather Flow Mass Loading - Based on Median Table 3+ PFAS Concentrations -
Flow / Loading Type Representative Flowrate (GPM)
Estimated Table 3+ PFAS Mass Discharge (µg/s)
Estimated Percentage of River Mass Loading (%)1
Biosolids PFAS Desorption - 15.5 0.16%
Sanitary 14 5.6 0.059%
WWTP Influent2 234 4.4 0.047%
Power 35 1.0 0.010%
Kuraray SentryGlas® 17 0.3 0.003%
DuPont PVF 94 0.3 0.003%
Kuraray Trosifol® 74 0.2 0.002%
DuPont Laboratory 0.35 0.1 0.001%
WWTP Effluent3 234 20.0 0.21%
Additional Wet Weather Loads
Stormwater (average annual)4 3.7 0.84 (0.058 – 2.5) 0.009%
Notes:
1 - The Cape Fear River 2020 median Table 3+ PFAS mass discharge was 9,500 µg/s.
2 - The WWTP influent mass discharge estimate is based on concentration measurements at the influent and was not calculated by adding loads to the WWTP presented in the table.
3 - The WWTP effluent mass discharge estimate is based on concentration measurements at the effluent and represents the discharges exiting the WWTP.
4 - The estimated range of stormwater mass discharge was 0.058 to 2.5 µg/s.

The results indicate that as a whole, the WWTP effluent represents a minor loading from the
Facility to the Cape Fear River. The WWTP represents only 0.21% of the total Table 3+ PFAS
load in the Cape Fear River for the median Cape Fear River 2020 Table 3+ PFAS mass discharge.
While the WWTP effluent loading itself to the Cape Fear River is minor, the loadings to the
WWTP are categorized as either primary, secondary, or tertiary loadings. The primary loadings
come from sanitary wastewater inflows and desorption of PFAS from biosolids in the waste
activated sludge in the WWTP. The Sanitary wastewater Table 3+ PFAS loads are interpreted to
originate primarily from Chemours Monomers IXM and PPA area washing machine wastewater.
The washing machines are used to launder the protective suits used in fluoroproduct manufacturing
areas. Meanwhile, biosolids preferentially sorb PFAS and act as a sink (i.e. a reservoir) for Table
3+ PFAS when high concentration influent events occur, such as discharge from a Chemours Area
washing machine. Subsequently, it is estimated these biosolids act as a reservoir of Table 3+ PFAS
that desorb back into the surrounding water as influent water concentrations decrease.
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Secondary loadings were from stormwater flows to the WWTP with tertiary loadings from
Kuraray, DuPont and Power process wastewater loadings. The source of Table 3+ PFAS loadings
to the Kuraray Area sampling location 23A, a tertiary loading which was specifically identified by
the CO Addendum, was interpreted to be historical PFAS present in the terracotta pipe. The
Terracotta Pipe prior to November 29, 2017 conveyed fluoroproduct manufacturing process
wastewater from the Chemours Monomers IXM area to the WWTP. These past flows are
interpreted to have emplaced Table 3+ PFAS which contributed to past detections. The Terracotta
Pipe was fully decommissioned by Chemours in April 2021. Kuraray flows sampled from a newly
installed pipe were low in concentration and similar to Cape Fear River intake water.
The Terracotta Pipe decommissioning is a completed action that is anticipated to reduce Table 3+
PFAS loadings to the WWTP. This report describes an additional five proposed actions to reduce
Table 3+ PFAS loads and subsequently evaluate post-action conditions:
• Direct Chemours Monomers IXM and PPA Area Washing Machine Effluent to Offsite
Disposal. Directing this effluent offsite will reduce Table 3+ PFAS loadings to the sanitary
network and subsequently the WWTP.
• Reduce Biosolids Volume and Consider Biosolids Transplant: The on-site biological
wastewater treatment system and associated solids will be reduced over the next few years
due to significant reduction in influent organic loading directed to the system from
Kuraray. This reduction will require Chemours to remove a significant amount of
biological solids and downsize the existing system. The modifications will begin in
summer 2021 when the biological treatment aeration tank is planned to be downsized from
1.7 million gallons (current aeration tank) to 250,000 gallons (current pre-digester tank).
Reducing the biosolids volume with the upcoming treatment plant modification will reduce
the amount of biosolids available to both sorb and desorb Table 3+ PFAS.
• Continue to Operate Air Emission Abatement Controls: Air emission abatement controls
over time will lead to reduce Table 3+ PFAS concentrations in stormwater, which will in
turn lead to reduced stormwater Table 3+ PFAS loadings to the WWTP.
• DuPont Laboratory Process Wastewater: Though a low loading to the WWTP,
concentrations were elevated from historical PFAS that may have been directed to the lift
station when the Process Manufacturing Development Facility (PMDF) lab, now DuPont
lab, supported the PMDF operations. The sump will be washed and rinsed.
• Assess WWTP Table 3+ PFAS through Consent Order paragraph 11(d) sampling program:
Modifications to the WWTP are to be completed alongside the recommendations made
above. Chemours will continue to assess WWTP influent and effluent concentrations and
assess PFAS loading reductions as part of the Consent Order Paragraph 11 sampling
program.
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1. INTRODUCTION
This report was prepared by Geosyntec Consultants of NC, P.C. (Geosyntec) for The Chemours
Company FC, LLC (Chemours) pursuant to the requirements of Paragraph 4(d) of the Addendum
to Consent Order Paragraph 12 (CO Addendum) amongst Chemours, the North Carolina
Department of Environmental Quality (NCDEQ), and Cape Fear River Watch. Prior investigations
pursuant to Consent Order Paragraph 11 indicated elevated Table 3+ per- and polyfluoroalkyl
substances (PFAS) loadings at the wastewater treatment plant (WWTP) effluent (Location 8) and
particularly one upstream location of the WWTP (Location 23A) when compared to the Cape Fear
River intake water used at the facility at the Chemours Fayetteville Works, North Carolina site
(the Facility, Figure 1). A series of investigations were completed to assess any remaining
significant loadings of Table 3+ PFAS2 directed to Location 23A3 (manhole upstream of the
(WWTP) and Location 83 (WWTP effluent).
At the Facility, Chemours conducts manufacturing operations alongside tenants Kuraray and
DuPont who operate separate manufacturing activities. The Kuraray and DuPont manufacturing
activities, alongside supporting activities completed in the Power area, generate wastewaters which
are directed to the Facility’s WWTP. Chemours areas (PPA and Monomers and IXM areas)
generate sanitary wastewater that is directed to the Facility’s WWTP. Sanitary and process
wastewaters are conveyed to the WWTP along the separate process and sanitary conveyance
network shown in Figure 2. The treated wastewater is then discharged via WWTP effluent at
Outfall 001. The WWTP is presently undergoing a series of major modifications and upgrades.
Relying on data collected between April 2019 to April 2021, this report describes the present state
of the WWTP and PFAS loadings to the WWTP and considers the future state of the WWTP. The
report concludes by describing completed remedial actions and proposing additional remedial
actions.
The remainder of this document is organized as follows:
• Section 2 – Background: describes the inputs to the WWTP and the WWTP configuration
• Section 3 – Scope and Methods: describes the sampling events executed to collect
wastewater samples to characterize Table 3+ PFAS compounds
• Section 4 – Results: describes the results of the sampling program and mass loading
assessment

2 Table 3+ Method PFAS compounds are often related to operations at the Chemours Fayetteville Works Facility.
3 Locations 23A and 8 refer to sample locations IDs used in the Consent Order Paragraph 11 reports. This location ID set is utilized here in this WWTP assessment report.
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• Section 5 – Data Assessment: describes the interpretation of the results and identifies
loadings of PFAS to Location 23A, the WWTP, and Location 8
• Section 6 – Proposed and Completed Remedial Actions: describes remedial actions
completed and proposes additional remedial actions
• Section 7 – References: lists documents referenced in this report
2. BACKGROUND
This section describes the types of wastewater flows and Facility areas which contribute to these
flows. The types of flows directed to the WWTP include:
• River Intake Water
• NCCW
• Process Wastewater generated from non-PFAS manufacturing activities and includes
utility wastewater generated from the Power area
• Sanitary Wastewater
• Stormwater
These flows originate from manufacturing and manufacturing support areas at the Facility. Areas
contributing either or both sanitary and process wastewater to the WWTP are listed below and
shown in Figure 1:
• Chemours Monomers and Ion Exchange Membrane (IXM) Area (Sanitary only)
• Chemours Polymer Processing Aid (PPA) Area (Sanitary only)
• WWTP internal recycle streams and sanitary;
• Power Area
• DuPont Polyvinylfluoride (PVF) Leased Area
• DuPont Laboratory
• Construction Area
• Kuraray Trosifol® Leased Area
• Kuraray SentryGlas® Leased Area
• Kuraray Laboratory
• Construction Area
Each area generates sanitary wastewater that is directed to the WWTP while only the Kuraray,
Power, and DuPont Areas currently discharge process wastewater to the WWTP. The composition
of wastewaters from each area is shown in the table below. The following sub-sections describe
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the different types of wastewater directed to the WWTP, the Facility Areas directing flows to the
WWTP, and the present and planned future configuration of the WWTP.
Sanitary Wastewater Stormwater Process Wastewater NCCW
Chemours Monomers IXM ● -- -- --
Chemours PPA ● -- -- --
WWTP Area ● ● -- --
Power1 ● ● ● --
DuPont PVF ● ● ● --
DuPont Laboratory -- -- ● --
Kuraray Trosifol®2 ● ● ● ●
Kuraray SentryGlas® ● -- ● ●
Kuraray Laboratory ● -- ● --
Construction Area3 ● -- -- --
Notes:
1 – Utility wastewater from the Power area is generated from the treatment of river intake water for use as NCCW, demineralized water and steam.
2 – The Kuraray Trosifol area stopped using and discharging NCCW to the WWTP in April 2021.
3 – The Construction Area is located in the south-west corner of the Facility and is used to stage equipment and materials for construction activities.

2.1 Wastewater Characterization
Wastewater streams to the WWTP are categorized into five types as described below.
2.1.1 Source Water
The Facility obtains water from two sources, purchased potable water from Bladen County and
water drawn from the Cape Fear River. Purchased potable water supplies Facility sanitary needs
(handwashing, etc.,) while water taken from the Cape Fear River is used to support manufacturing
operations.
Water drawn from the Cape Fear River is treated at the Power Area for use as NCCW, filtered
water, demineralized water, and steam by the manufacturing areas. The PFAS concentrations
detected in the river intake water represents background PFAS concentrations that enter the
Facility. Intake river water concentrations have been previously described and characterized in
reports submitted to NCDEQ pursuant to Paragraph 11 of the Consent Order (Geosyntec, 2020a).
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2.1.2 Non-Contact Cooling Water (NCCW)
NCCW is used to cool equipment in the manufacturing areas. This water does not come in contact
with manufactured products. The majority of NCCW used at the Facility is not discharged to the
WWTP but is rather directed along the Facility Conveyance Network to Outfall 002. At the
Facility, only Kuraray operations discharge a portion of their NCCW usage to the WWTP; the
much larger remainder is discharged to the Conveyance Network. Currently, NCCW is generated
in the Kuraray SentryGlas® area and directed to the WWTP. The Kuraray Trosifol® area stopped
using NCCW in April 2021.
2.1.3 Process Wastewater
Process wastewater directed to the WWTP is generated from non-PFAS manufacturing processes
in the DuPont and Kurarayareas. Process wastewater from Chemours Monomers IXM and PPA is
currently sent to offsite disposal and not the Facility WWTP. The Power area generates utility
wastewater from the treatment of river intake water for use as NCCW, demineralized water and
steam. Utility wastewater is directed to the WWTP.
2.1.4 Sanitary Wastewater
Sanitary wastewater is generated from manufacturing and support operations areas and directed
through a separate sanitary piping network to the WWTP for treatment. Sanitary and process
wastewaters combine in the influent sump to the WWTP. Sanitary water originates as potable
water purchased from Bladen County. Sanitary wastewater also includes flows from Chemours
PPA and Monomers IXM Area washing machines used to launder protective equipment.
2.1.5 Stormwater
A portion of WWTP flows include stormwater from Kuraray, DuPont, Power Areas, and the
WWTP. This stormwater originates from outdoor trenches, dikes, and bermed areas where
stormwater runoff is directed to the WWTP.
2.2 Manufacturing Areas
The manufacturing areas and the wastewater generated in each area is described in this subsection.
A map of the manufacturing areas, wastewater conveyance network, and sample locations for
wastewater discharges from each area is provided in Figure 3.
Chemours Monomers and IXM Area and PPA Area
The Chemours Monomers IXM and PPA areas direct sanitary wastewater to the WWTP.
Kuraray Leased Areas
Three separate Kuraray leased areas direct flows to the WWTP: SentryGlas®, Trosifol®, and the
Kuraray Laboratory. Kuraray SentryGlas® discharges process wastewater, NCCW, and sanitary
wastewater to the WWTP. The Kuraray Trosifol® area discharges process wastewater, sanitary
wastewater, and some stormwater to the WWTP. The flowrate of wastewater from the Kuraray
Trosifol® area used to calculate Table 3+ loadings to the WWTP includes NCCW since it reflects
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the conditions present at the site prior to April 2021 when samples were collected that were used
in the analysis. As reported in NPDES permit submittals, Kuraray does not use or manufacture
Table 3+ PFAS (Chemours, 2019).
Prior to April 8, 2021, Kuraray Area process wastewater, stormwater, and NCCW flows were
conveyed to the WWTP along the Terracotta Pipe. This pipe, until November 29, 2017, had also
conveyed Chemours Monomers IXM process wastewater. Kuraray constructed a new high-density
polyethylene (HDPE) pipe to convey these flows to the WWTP and Chemours decommissioned
and abandoned the Terracotta Pipe.
DuPont Leased Area
From the DuPont Area process wastewaters (PVF Plant 1, PVF Plant 2, DuPont Laboratory), some
stormwater and sanitary wastewaters are directed to the WWTP. As reported in NPDES permit
submittals, DuPont does not use or manufacture Table 3+ PFAS (Chemours, 2019).
Power Area
The Power Area directs sanitary and utility wastewaters to the WWTP.
2.3 Wastewater Treatment Plant (WWTP) Configuration
The present WWTP is undergoing optimization modifications due to reduced flow rates from
certain inputs. The table below summarizes the estimated present flows, as some modifications
have been made to date, and the estimated future flows to the WWTP. These flows are based on a
Facility-wide flow balance in 2020 and 2021. The following subsections describe the current and
future WWTP configuration.

Current Flows (GPM)
Sanitary Flows1 14
Kuraray Trosifol®2 74
Kuraray SentryGlas® 17
Kuraray Laboratory3 0.35
DuPont PVF 94
DuPont Laboratory3 0.35
Power 35
Stormwater4 3.7
Total 238
Notes:
1 - Sanitary wastewater flows are summed together from manufacturing areas combined and are excluded from the summations of flows from the areas in other rows of the table.
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2 – Flowrate from Kuraray Trosifol® reflects conditions prior to April 2021 when NCCW was discharged to the
WWTP from the area.
3 - Kuraray Laboratory and DuPont Laboratory flowrates are estimated to discharge 500 gallons per day.
4 - Stormwater flows are based on the annual average stormwater flows (based on historical precipitation data from a 15-year period of record) averaged over an entire year, which includes periods of dry weather. The derivation of
stormwater flows is described later in this report.
MGD – million gallons per day

2.3.1 Current WWTP
The current WWTP is a biological conventional activated sludge wastewater treatment system
designed to remove biochemical oxygen demand (measured as 5-day biological oxygen demand
[BOD5]). Combined wastewater collected at the concrete influent lift station (Location 22) from
the manufacturing areas is pumped to an 850,000 gallon Equalization Basin complete with surface
aerators and submerged mixers. The wastewater is pumped from the Equalization Basin to an
aerated 250,000 gallon Pre-digester Tank where initial biological activity begins. Wastewater is
pumped from the Pre-digester Tank to a 1,700,000 gallon Aeration Tank where biological activity
continues. Fresh influent wastewater is mixed with activated sludge in the Aeration Tank to
remove BOD5 and consequently generates additional biomass. The Aeration Tank contents of
wastewater and biomass is referred to as mixed liquor. The Aeration Tank is aerated by a diffused
aeration system installed on the bottom of the tank. Basin activated sludge mixed liquor is directed
onward to the 685,000 gallon main clarifier for separation of activated sludge from treated effluent.
Two other clarifiers are used as standby separation processes if required during maintenance of
the main clarifier. Treated clarifier effluent is discharged onward to Location 8. Clarifier underflow
is recirculated back to the Aeration Tank as recycled activated sludge while waste activated sludge
is conditioned and pumped to a Sludge Press for dewatering. Dewatered sludge is disposed of
offsite while press filtrate is recycled back to the Pre-digester Tank.
2.3.2 Future WWTP
The WWTP configuration is currently being modified as part of a first phase of modifications and
is in the design stages of a planned significant second phase of modifications in 2021 and 2022.
Recently, BOD5 loading from the Kuraray processes has decreased significantly resulting in the
activated sludge treatment system being oversized. Chemours is currently considering various
WWTP upgrades that include physical/chemical treatment and biological treatment of process and
sanitary effluent from the manufacturing areas. The modifications to the WWTP are currently in
the conceptual design phase and Chemours is considering various biological treatment
technologies and physical/chemical treatment to provide treatment for the WWTP. Due to the
reduction in organic loading, the size of the future biological treatment system is expected to be
smaller.
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3. SCOPE AND METHODS
The data used in the assessment presented in this report were collected during several sampling
events. The sequence, scope, and purpose of the investigations are shown in the table below and
described in the following subsections. Parsons of NC conducted the field work and sampling
activities described in this report.
Sampling Event Period Scope Purpose
Consent
Order
Paragraph 11 Sampling
April 2019
to April
2021
Collect nine bimonthly samples
from various flow pathways across
the Facility
Characterize PFAS
concentrations along
Conveyance Network at Facility
Stormwater Assessment
June 5,
2019 and October 16, 2019
Collect stormwater samples Sitewide during storm events
Characterize stormwater PFAS concentrations and loadings
June 2020 Sampling Event June 2020 Sample wastewater sources generated from the manufacturing areas, Power, and WWTP
Assess PFAS loadings to WWTP
March 2021 Sampling Event
March 2021
Sample wastewater sources generated from the manufacturing areas, Power and WWTP; including
sanitary wastewater
Assess PFAS loadings to WWTP
Kuraray
Process
Piping Sampling Event
April 2021
Samples of process wastewater
were collected from new lift
stations located at the discharge of Kuraray SentryGlas® and Kuraray Laboratory
Assess PFAS in Kuraray
process wastewater in new effluent pipe

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3.1 Sampling Locations
This WWTP assessment considered 193 samples results collected from 40 locations. Sample types
included stormwater, sanitary wastewater, and combined NCCW and process wastewaters. The
samples collected which were considered in this report are summarized in the table below and
described in more details in Table 1.

No.
Locations
No.
Samples Location IDs
Sanitary Flows 10 21 22-1, MH-1, MH-4,LS-1, MH-3, LS-2, MH-2, 23A-3-ACID, 23A-3-NOM, 24D-3-NOM
Kuraray Trosifol® 3 41 6A, 6B, 18
Kuraray SentryGlas® 1 1 23C-1
Kuraray Laboratory 3 12 23B, 23A-2, 23C-2
DuPont PVF 2 26 19A, 19B
DuPont Laboratory 1 3 LS-3
Power 8 15
18A-1A, 18A-2 18B, 18A-3A 18A-3B, 18A-3C, 18A 18A-1B
WWTP1 5 9 8, 22, AS-1 sludge AS-1 total, AS-1 filtered
River Water Intake 1 14 1
Terracotta Pipe 2 16 23A, 22-3
Stormwater 4 7 5, 40 13, 35
Total 40 193
Notes:
1 - WWTP samples come from the influent, effluent, and aerobic basin. Three activated sludge samples were collected from the aerobic basin. Filtrate and solids from filtered activated sludge samples were also analyzed.

3.2 Sampling Events
3.2.1 Initial Characterization of PFAS in Process and Non-Process Wastewater Sampling
Pursuant to Consent Order Paragraph 11 (P11), Chemours completed bimonthly sampling of over
30 locations across the Facility to characterize PFAS in process and non-process wastewaters from
April 2019 to August 2020. The investigation is summarized in quarterly reports submitted to the
NCDEQ. The final report was submitted to the NCDEQ in December 2020 (Geosyntec, 2020a).
Ongoing sampling continued as part of the P11 sampling program and includes samples collected
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in October and November 2020 and February 2021 that will be reported to NCDEQ with
subsequent P11 sampling reports. Only sample locations that discharged wastewater to the
wastewater conveyance system and WWTP were considered in the analysis presented in this
report.
3.2.2 June 2020 WWTP Sampling Event
Samples of various wastewater streams that are directed to the Terracotta Pipe and WWTP were
collected in June 2020 to identify any loading of PFAS from locations not previously characterized
during the initial characterization of PFAS loadings at the Facility (Geosyntec, 2020a). The
samples collected in June 2020 and methods followed during the sampling event, including quality
assurance / quality control (QA/QC) information, are described in Section 3.6. Samples collected
in the June 2020 sampling event were analyzed by Eurofins TestAmerica (Eurofins) in
Sacramento, CA.
3.2.3 March and April 2021 WWTP Sampling Event
A sampling event was conducted in March and April 2021 to repeat elements of the June 2020
sampling event and collect additional data of wastewater streams not previously characterized. The
methods followed to collect the samples and QA/QC information are provided in Section 3.7.
Samples were sent to Enthalpy Analytical (Enthalpy) in Wilmington, NC for analysis.
3.2.4 April 2021 Kuraray Effluent Pipe Sampling
Kuraray completed the installation of a new HDPE pipe in April 2021 to convey process effluent
from the SentryGlas®, Trosifol®, and Kuraray Laboratory Areas to the WWTP influent sump.
The piping replaced the historic Terracotta Pipe conveyance (including Location 23A) formerly
shared with Monomers IXM process wastewater. Three different locations were sampled:
• SentryGlas® effluent lift station (Location 23C-1): representative of SentryGlas® process
wastewater effluent only
• Kuraray Lab effluent lift station (Location 23C-2): representative of Kuraray Lab process
wastewater effluent only
• Kuraray Trosifol® effluent (Location 18): representative of Trosifol® process wastewater
effluent and stormwater directed to outdoor process trenches and sumps
3.2.5 Analytical Methods, Sample Packing, Shipping, and Field QA/QC Samples
The detailed information related to the analytical methods, sampling methods and protocol,
sampling shipping, QA/QC information, and other information unique to each sampling event that
provided data in this evaluation were consistent with methods described in the Characterization
of PFAS in Process and Non-Process Wastewater and Stormwater: Initial Characterization –
Final Quarterly Report (Geosyntec, 2020a).
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3.3 Stormwater Assessment
PFAS loading to the WWTP due to stormwater runoff were estimated by modeling the stormwater
flow volumes to the WWTP and using PFAS concentrations from stormwater samples collected
near or within areas draining to the WWTP. Stormwater flows were modeled using the long-term
continuous simulation hydrologic model that was developed for the Facility and described
previously in the Engineering Report for the Stormwater Capture and Treatment System
(Geosyntec, 2021). The model used fifteen years of rainfall data from January 1, 2006 to December
31, 2020. Drainage areas to the WWTP are listed below alongside the area-weighted impervious
fractions for each area.4 The values were developed using drainage area characteristics. The
hydrologic model was not calibrated with measured flow data, consequently the flow values
modeled should be interpreted with such consideration.
Area Footprint to WWTP (acres)
Area-weighted Impervious Fraction
1-inch stormwater runoff volumes (gallons)
Average Annual Flowrate
(gpm)1
Chemours Monomers IXM 0 (none) N/A 0 0
Chemours PPA 0 (none) N/A 0 0
Kuraray SentryGlas® 0 (none) N/A 0 0
Kuraray Trosifol® 0.87 0.97 22,000 1.7
WWTP 0.081 1 2,100 0.16
Power 0.53 1 14,000 1.1
DuPont 0.35 1 9,000 0.70
Total 1.8 0.99 47,000 3.7
Notes:
1 - The average annual flowrate in gpm (gallons per minute) is estimated based on the total annual volume of
stormwater over a year divided by the length of a year, which includes periods of dry weather.

Sitewide stormwater sampling events in June 2019 (Geosyntec, 2019) and October 2019
(Geosyntec, 2020a) collected and analyzed grab samples of stormwater throughout the Facility.
The table below shows the stormwater sampling locations identified as being representative of
stormwater draining to the WWTP. These locations are plotted on Figure 3.

4 The estimated (area-weighted) slope, width, and soil characteristics (suction head, hydraulic conductivity, and initial deficit) were also used to characterize each area in the hydrologic model.
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Area
Representative Stormwater
Sample Locations
Stormwater Only
Samples Collected
Kuraray 5 June & October 2019
Power Area 40 June & October 2019
DuPont 13 October 2019
WWTP 35 June & October 2019

Stormwater loads to the WWTP were estimated for the annual average stormwater runoff volumes
to the WWTP using the range of concentrations presented in Table 2 to evaluate a stormwater
PFAS loads. The results of the analysis are described later in Section 4, Results.
3.4 Mass Loading Assessment
The Table 3+ PFAS mass discharge (units of mass per time) from each of the manufacturing areas
and from sanitary and stormwater was calculated by multiplying flowrate for each area / flow type
by the median PFAS concentration data from that area. The PFAS concentration data collected
during the time period for the sampling investigations were used to calculate the median
concentration. Some areas had multiple locations sampled during the investigation that combined
at locations downstream in the process (i.e., Locations 6A and 6B combined at Location 18 in the
Kuraray Trosifol® area). For areas where upstream sampling locations combined at downstream
locations, the downstream location PFAS concentration data were used.
Limited sanitary flowrate information was available related to each manufacturing area at the
Facility. Sanitary flowrates for each area were estimated by dividing the sanitary usage by
Chemours, DuPont, and Kuraray based on employee headcount. Based on this assessment, DuPont
contributed approximately 7% of the total sanitary flowrate at the Facility while the balance was
assumed to be discharged to the central lift station (LS-1) by the Chemours Monomers and IXM,
Chemours PPA, and Kuraray Areas.
4. RESULTS
The data used in this assessment are described in the sub-sections below. Data are summarized in
tables, as follows:
• June 2020, March 2021, and April 2021 WWTP Sampling Events: The Table 3+ PFAS
analytical results from the process and sanitary wastewater sample locations collected
during these investigations are summarized in Table 3.
• P11 Initial Characterization and Ongoing Sampling Events: The Table 3+ PFAS analytical
results are provided in the in-text summary tables in this report. The detailed analytical
results are provided in quarterly sampling reports provided to the NCDEQ (Geosyntec,
2020a).
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• Stormwater Assessment: Results of the stormwater evaluation of Table 3+ PFAS reference
the historical sitewide stormwater assessments (Geosyntec, 2019 and 2020a) dataset.
Results are also summarized in Table 2.
The remainder of this section describes data quality, summarizes the wastewater concentration,
and summarizes the mass loading assessment results.
4.1 Data Quality
The analytical data were reviewed using the Data Verification Module (DVM) within the Locus™
Environmental Information Management (EIM) system, a commercial software program used to
manage data. Following the DVM process, a manual review of the data was conducted. The DVM
and the manual review results were combined in laboratory analytical data review narrative reports
for each set of sample results, which were consistent with Stage 2b of the USEPA Guidance for
Labeling Externally Validated Laboratory Analytical Data for Superfund Use (USEPA-540-R-08-
005, 2009). The data review narrative reports is provided in Appendix A. The narrative report
summarizes which samples were qualified (if any), the specific reasons for the qualification, and
any potential bias in reported results. The data usability, in view of the project’s data quality
objectives (DQOs), was assessed, and the data were entered into the EIM system.
The data were evaluated by the DVM against the following data usability checks:
• Hold time criteria
• Field and laboratory blank contamination
• Completeness of quality assurance/quality control samples
• Matrix spike/matrix spike duplicate recoveries and the relative percent differences (RPDs)
between these spikes
• Laboratory control sample/control sample duplicate recoveries and the RPD between these
spikes
• Surrogate spike recoveries for organic analyses
• RPD between field duplicate sample pairs
A manual review of the data was also conducted and includes manual review of the
chromatographic peaks for Table 3+ compounds, application of qualifiers originating from field
QC samples, and investigative sample completeness. The data review process (DVM plus manual
review) applied the following data evaluation qualifiers to the analytical results as required:
• J Analyte present, reported value may not be accurate or precise
• UJ Analyte not present below the reporting limit; reporting limit may not be
accurate or precise
• B Analyte present in a blank sample, reported value may have a high bias
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The data review process described above was performed for the laboratory chemical analytical
data generated for the sampling event. The DQOs were met for the analytical results for accuracy
and precision. The data collected are believed to be complete, representative and comparable, with
the exception of R-PSDA, Hydrolyzed PSDA, and R-EVE.
4.1.1 Table 3+ 17 Compounds
As reported in the Matrix Interference During Analysis of Table 3+ Compounds memorandum
(Geosyntec, 2020c), matrix interference studies conducted by the analytical laboratory
(TestAmerica, Sacramento) have shown that the quantitation of three compounds (R-PSDA
[formerly Byproduct 4], Hydrolyzed PSDA [formerly Byproduct 5], and R-EVE) is inaccurate due
to interferences by the sample matrix in both groundwater and surface water. Given the matrix
interference issues, Total Table 3+ PFAS concentrations are calculated and presented in the tables
of this report in two ways: (i) summing over 17 of the 20 Table 3+ compounds “Total Table 3+
(sum of 17 compounds)”, i.e., excluding results of R-PSDA, Hydrolyzed PSDA, and R-EVE, and
(ii) summing over 20 of the Table 3+ compounds “Total Table 3+ (sum of 20 compounds)”.
Expressing these data as a range represents possible values of what these results might be without
matrix interferences. In other words, the sum of all 17 compounds is an underestimate of the actual
value while the sum of the 20 compounds is likely an overestimate of the actual value.
For clarity the text and figures of this report include both the Table 3+ 17 compound sums and
Table 3+ 20 compounds sums.
4.2 WWTP Table 3+ PFAS Concentration Summary
The data used in this analysis are summarized in Table 1. A brief summary of the Total Table 3+
(17 compounds) results is provided below.
Source No. of Samples Median2 (ng/L) Minimum2 (ng/L) Maximum2 (ng/L)
Washing Machines 3 69,000 29,000 690,000
WWTP Biosolids 3 5,500 4,000 7,100
Sanitary Wastewater – All Areas 18 6,800 340 43,000
Location 23A - Terracotta Pipe 15 11,000 800 40,000
Stormwater1 7 3,600 250 10,000
DuPont Lab Lift Station 3 2,900 290 190,000
WWTP Effluent 15 1,400 200 31,000
Power 15 450 0 600
WWTP Influent 14 300 93 29,000
Kuraray Areas 54 110 0 34,000
River Water Intake 14 62 0 270
DuPont PVF 26 54 5 970

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Notes
1 - Stormwater concentrations represent approximate stormwater runoff volume-weighted concentrations. Based on the available stormwater sample results representative of each area, the minimum, maximum, and median
measured PFAS concentrations were determined. To account for the expected variation in PFAS concentrations in stormwater, the variability of recent, estimated stormwater concentrations at Outfall 002 (methodology outlined
in the Reduction Plan [Geosyntec, 2019]) was quantified and applied. To account for both the typical variability in stormwater data and the uncertainty due to the limited stormwater sample data, the 90% confidence intervals
for estimated Outfall 002 stormwater concentrations (as percentages of the median) were applied to the minimum and maximum measured representative stormwater concentrations in each of the Facility areas to estimate a low
and high stormwater concentration, respectively.
2 - All concentration data has been rounded to two significant digits.

The highest concentrations were observed from the Chemours PPA and Monomers IXM washing
machines which flow into sanitary wastewater. Other high concentrations include Location 23A,
the DuPont Lab Lift Station, Stormwater, and WWTP biosolids. For most source areas to the
WWTP the median concentration data were more similar to the minimum values than the
maximum values.
The Kuraray, DuPont, and the Power Areas were found to contain low concentrations of Total
Table 3+ PFAS substances similar in concentration to River Intake concentrations. These areas
contribute approximately 94% of the WWTP influent flows. These locations are predominantly
process wastewater, some NCCW, and stormwater. The maximum Kuraray Area concentrations
(Location 23A) is in the Terracotta Pipe, which historically also conveyed process wastewater
from Chemours Monomers IXM prior to 2017. In April 2021, wastewaters from Kuraray
SentryGlas® operations and Laboratory were sampled from the replacement HDPE pipe at
Locations 23C-1 and 23C-2. These samples had results similar to River Intake at median
concentrations of 290 and 255 nanograms per liter (ng/L) at location 23C-1 and 23C-2,
respectively.
Lastly, the WWTP effluent concentrations were higher than the WWTP influent concentration,
suggesting additional contribution of PFAS occurs across the WWTP.
4.2.1 Dry Weather vs. Wet Weather
Weather affects the WWTP loads. From 15 samples collected at the WWTP effluent (Outfall 001
and Location 8) between April 2019 and February 2021, 10 were collected during dry weather and
five (5) were collected during wet weather. The samples collected during wet weather had higher
PFAS concentrations than those collected during dry weather indicating stormwater contributions
to the WWTP. The average wet weather concentration was approximately 10,000 ng/L for Total
Table 3+ (median was 4,500 ng/L), and the average dry weather concentration was approximately
1,700 ng/L (median was 1,350 ng/L).

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4.3 WWTP Table 3+ PFAS Mass Loading Assessment
The mass loading assessment calculated the Table 3+ PFAS mass discharge for the separate flow
/ loading types and then compared the loadings to the Cape Fear River Table 3+ PFAS mass
discharge by calculating how much of the Cape Fear River Load potentially originated from these
WWTP loads. This calculation was performed using the 2020 median Cape Fear River PFAS load
of 9.5 milligrams per second (mg/s), i.e. 9,500 micrograms per second (µg/s), based on data
reported in Cape Fear River PFAS Mass Loading Assessment – Fourth Quarter 2020 Report
(Geosyntec, 2020b). The results of the assessment are summarized in the table below. The results
indicate Table 3+ PFAS desorption from biosolids in the WWTP and sanitary flows are the two
largest contributing factors to WWTP effluent Table 3+ PFAS mass discharge followed by
stormwater loads. PFAS desorption from biosolids across the WWTP were estimated by
subtracting in the influent PFAS loading from the effluent PFAS loading - a calculation basis
supported by the concentration of PFAS in the waste activated sludge and described later in Section
5.1.4.
Dry Weather Flow Mass Loading - Based on Median Table 3+ PFAS Concentrations -
Flow / Loading Type Representative Flowrate (GPM)
Estimated Table 3+ PFAS Mass Discharge (µg/s)
Estimated Percentage of River Mass Loading (%)1
Biosolids PFAS Desorption - 15.5 0.16%
Sanitary 14 5.6 0.059%
WWTP Influent2 234 4.4 0.047%
Power 35 1.0 0.010%
Kuraray SentryGlas® 17 0.3 0.003%
DuPont PVF 94 0.3 0.003%
Kuraray Trosifol® 74 0.2 0.002%
DuPont Laboratory 0.35 0.1 0.001%
WWTP Effluent3 234 20.0 0.21%
Additional Wet Weather Loads
Stormwater (average annual)4 3.7 0.84 (0.058 – 2.5) 0.009%
Notes:
1 - The Cape Fear River 2020 median Table 3+ PFAS mass discharge was 9,500 µg/s.
2 - The WWTP influent mass discharge estimate is based on concentration measurements at the influent and represents the combined flows to the WWTP.
3 - The WWTP effluent mass discharge estimate is based on concentration measurements at the effluent and represents the combined flows into and mass discharges exiting the WWTP.
4 - The estimated range of stormwater mass discharge was 0.058 to 2.5 µg/s.

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5. DATA ASSESSMENT
This section presents the identification of significant sources of Table 3+ PFAS loading to the
WWTP effluent (Location 8) and to Location 23A. This section first describes the identified source
types of Table 3+ PFAS to the WWTP and then evaluates the significance of the different Table
3+ PFAS loadings to the WWTP effluent.
5.1 Source Types of Table 3+ PFAS to the WWTP
Five potential source types of Table 3+ PFAS to the WWTP were identified and are listed below.
The following sub-sections describe each of these source types.
• Chemours Washing Machines
• Historic Table 3+ PFAS
• Stormwater
• Biosolids PFAS Desorption
• Potentially limited groundwater intrusion
5.1.1 Chemours Monomers IXM and PPA Area Washing Machines
Table 3+ PFAS from washing machines are interpreted to be the source of Table 3+ PFAS in
sanitary wastewater from the Chemours Monomers IXM and PPA Areas. Washing machines in
these areas are used to clean operator suits. The washing machines currently in use are listed in the
table below along with measured Table 3+ PFAS concentration from the sample collected in June
2020 at the effluent from each of the washing machines. One sample of washing effluent was
collected from each location. The flowrate from the washing machines is estimated at several
hundred gallons per day. These washing machines discharge Table 3+ PFAS to the sanitary
wastewater conveyance system and contribute to the overall sanitary wastewater PFAS mass load.
Chemours is currently modifying the washing machine plumbing to collect and direct the sanitary
wastewater effluent from the machines for off-site disposal and so detailed loading calculations
were not completed.
Area Washing Machines Table 3+ PFAS Concentration (ng/L)
PPA Acid 690,000
PPA Nomex 69,000
Chemours Monomers and IXM Nomex 29,000

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5.1.2 Historic Table 3+ PFAS
Historical Table 3+ PFAS from past fluoroproduct manufacturing operations process wastewater
are interpreted to be the dominant source of Table 3+ PFAS in former Terracotta Pipe locations,
particularly Kuraray Locations 23A and the DuPont Laboratory Lift Station location LS-3.
Fluoroproduct manufacturing operations historically discharged process wastewater containing
PFAS through the Terracotta Pipe from the Monomers IXM Area and from the former polymer
manufacturing and development facility (PMDF) Area at the now DuPont Laboratory Lift location.
These historic operations are interpreted to have emplaced PFAS in these sewers / sumps which
overtime are desorbing or are being mobilized while attached to sediments and directed to the
WWTP.
5.1.3 Stormwater Table 3+ PFAS
Stormwater Table 3+ PFAS are interpreted to be the source of increased wet weather detections at
the WWTP effluent described in Section 4.2.1 and a contributor to the minor dry weather
detections in Kuraray, Power, and DuPont process water samples. These three areas combined
stormwater containing Table 3+ PFAS with process wastewater. During dry weather, Table 3+
PFAS from prior stormwater events are interpreted to remain Table 3+ PFAS, either as stormwater
or sediments from storm events with sorbed Table 3+ PFAS both of which were not fully flushed.
5.1.4 Biosolids Table 3+ PFAS Desorption – Reservoir of PFAS
Desorption of PFAS from biosolids in the WWTP is interpreted to be a source of PFAS within the
WWTP to the WWTP effluent. Biosolids preferentially sorb PFAS and act as a sink (i.e. a
reservoir) for Table 3+ PFAS when high concentration influent events occur, such as discharge
from a Chemours Area washing machine. Subsequently these biosolids act as a reservoir of Table
3+ PFAS that desorb back into the surrounding water as influent water concentrations decrease.
The dynamic of PFAS absorption followed by the potential for desorption is illustrated in
comparing the mass of PFAS present in biosolids compared to the surrounding water phase (the
mixed liquor). Of the PFAS solids present in the mixed liquor sample, 99.4% of the PFAS present
were bound in the biosolids while only 0.6% were present in water.
5.1.5 Potentially Limited Groundwater Intrusion
Groundwater intrusion is not presently interpreted to be a source of Table 3+ PFAS to the WWTP.
To evaluate the potential for groundwater intrusion, the existing wastewater conveyance network
piping elevations were compared to adjacent groundwater elevation data using the highest
groundwater elevations observed between December 2017 and March 2021. The analysis
performed was considerably conservative. It assumed the lowest possible piping elevations
possible based on the uncertainty in the piping elevations, increasing the potential for groundwater
elevations to be considered higher than piping elevations. Facility drawing elevations of the
process and sanitary sewer network are assumed to be accurate within +/- 1 foot of the NAVD88
survey system. The level of uncertainty reported here is relatively high since Facility elevation
benchmarks do not correspond to recent survey information.
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The historical process sewer network (including the Terracotta Pipe) was compared to
groundwater elevations in Figure 4 and the sanitary sewer network was compared to groundwater
elevations in Figure 5. Three potential locations where groundwater may be at higher elevations
than the conveyance networks were identified:
i) The abandoned and decommissioned Terracotta Pipe which historically conveyed
process wastewater from the Chemours Monomers IXM Area to the main Terracotta
Pipe. This section does not present a source of Table 3+ PFAS to the WWTP. This
section has been decommissioned and grouted.
ii) The sanitary conveyance network in the Chemours Monomers IXM Area. Groundwater
is not presently interpreted to be a source to sanitary loadings. Sanitary wastewater Table
3+ PFAS loads from the Monomers IXM Area are dominated by washing machine
discharges and there is uncertainty in the piping elevation.
iii) The WWTP influent sump. Groundwater is not presently interpreted to be a source as
influent sump Table 3+ PFAS loads are presently dominated by other influent streams
and there is uncertainty in the piping elevation.
The assessment was unable to obtain invert elevations in a timely manner to evaluate sanitary
elevations in the DuPont leased area (located in the south-east corner of the Facility) and the
Construction Area (located in the south-west corner of the Facility), and process sewer elevations
in the DuPont area compared to groundwater elevations.
5.2 Assessment of Loading Significance
As a whole, the WWTP effluent represents a minor loading from the Facility to the Cape Fear
River. As shown in Section 4.3, the WWTP represents only 0.21% of the total Table 3+ PFAS
load in the Cape Fear River for the median Cape Fear River 2020 Table 3+ PFAS mass discharge.
Considered another way, the highest loading of HFPO-DA from the WWTP effluent would result
in a Cape Fear River HFPO-DA concentration contribution of 0.24ng/L5 at 7Q10 low flow river
conditions.
While the WWTP effluent loading itself to the Cape Fear River is minor, the loadings to the
WWTP are categorized and described in the following subsections as either primary, secondary or
tertiary loadings based on the results of the loading analysis presented in Section 4.3.
5.2.1 Primary Table 3+ PFAS Loadings to WWTP
The primary Table 3+ PFAS loadings to the WWTP are from desorption of Table 3+ PFAS from
biosolids and sanitary wastewaters. The sanitary wastewater loadings primarily originate from

5 Calculation of Cape Fear River HFPO-DA concentration from WWTP based on HFPO-DA concentration of 210ng/L collected during the P11 sampling program and a WWTP effluent flow rate of 0.34 MGD.
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washing machine discharges from the Chemours Monomers IXM and PPA Areas. As described in
the following section, Chemours will be directing washing machine discharges offsite. This will
reduce sanitary wastewater Table 3+ PFAS loadings.
While desorption of Table 3+ PFAS from WWTP biosolids contribute Table 3+ PFAS to the
WWTP effluent, the biosolids do not represent a source of PFAS, rather they are a reservoir
absorbing Table 3+ PFAS inputs. The remedial actions and WWTP changes described in the next
section will reduce loadings to the WWTP and by extension reduce the degree of desorption of
Table 3+ PFAS from biosolids.
5.2.2 Secondary Table 3+ PFAS Loadings to the WWTP
The secondary Table 3+ PFAS loading to the WWTP originates from stormwater loadings.
Stormwater loads to the WWTP will decrease over time as Chemours continues to operate air
emission abatement technologies such as the thermal oxidizer leading to surfaces contacting
stormwater being steadily more flushed overtime.
5.2.3 Tertiary Table 3+ PFAS Loadings to the WWTP
The tertiary Table 3+ PFAS loadings to the WWTP originate from Kuraray, DuPont, and Power
Areas. The relatively minor loadings of Table 3+ PFAS detected at these locations are interpreted
to originate from stormwater interactions and from historic PFAS contributions. Interpreted
historical PFAS contributions were for Kuraray Terracotta Pipe locations, including Location 23A,
and the DuPont Laboratory. Process wastewater sampled from Kuraray flows after the replacement
HDPE pipe was installed had low Table3+ PFAS loadings. Similarly, the DuPont PVF and Power
Areas show low Table 3+ PFAS loadings.
6. PROPOSED AND COMPLETED REMEDIAL ACTIONS
This section describes completed and proposed remedial actions to the WWTP which are
anticipated to reduce the loading of Table 3+ PFAS to the WWTP. These actions originate from
both observations made in this assessment and from modifications already planned to the WWTP
by the Facility. The remainder of this first section describes completed actions and then describes
proposed actions.
6.1 Completed Action - Terracotta Pipe Replacement
The Terracotta Pipe, a source of historical PFAS to both Location 23A and the WWTP, has been
abandoned and decommissioned. In the future, this pipe will not contribute Historical Table 3+ to
the WWTP. Chemours first ceased discharge of process water through the Terracotta Pipe in 2017,
and then grouted the section of pipe between the Chemours Monomers IXM and the Terracotta
Pipe main line in February 2019. In October 2020, a new HDPE line was installed to direct process
wastewater from the Power area to the WWTP. In April 2021, Kuraray installed a new HDPE line
to convey process wastewater from the SentryGlas®, Laboratory, and Trosifol® areas to the
WWTP. In April 2021, Chemours completed the abandonment and decommissioning of the
Terracotta Pipe by filling the pipe with grout.
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6.2 Proposed Actions to be Completed
Below are proposed actions to reduce Table 3+ PFAS loads to the WWTP and evaluate the post-
action conditions.
• Direct PPA Area Washing Machine Effluent to Offsite Disposal/Incineration by July 2021
and direct Chemours Monomers IXM once the PPA area modifications are complete
Directing this effluent offsite will reduce Table 3+ PFAS loadings to the sanitary network
and subsequently the WWTP. The Facility is currently in progress for completing this
action.
• Reduce Biosolids Volume and Consider Biosolids Transplant: The Facility is reducing the
size of the current WWTP in Phase 1 which will significantly reduce biosolid. In addition
the amount biosolids to be significantly be reduced due to the reduction in organic loading.
This smaller plant will reduce the amount of biosolids available to both sorb and desorb
Table 3+ PFAS, and receive fewer Table 3+ PFAS inputs based on actions proposed and
completed.
• Continue to Operate Air Emission Abatement Controls: Air emission abatement controls
over time will lead to reduce Table 3+ PFAS concentrations in stormwater, which will in
turn lead to reduced stormwater Table 3+ PFAS loadings to the WWTP.
• DuPont Laboratory Process Wastewater: Though a low loading to the WWTP,
concentrations were elevated from historical PFAS that may have been directed to the lift
station when the Process Manufacturing Development Facility (PMDF) lab, now DuPont
lab, supported the PMDF operations. The sump will be washed and rinsed.
• Assess WWTP Table 3+ PFAS through Consent Order paragraph 11(d) sampling program:
Modifications to the WWTP are to be completed alongside the recommendations made
above. Chemours will continue to assess WWTP influent and effluent concentrations and
assess PFAS loading reductions as part of the Consent Order Paragraph 11 sampling
program.

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7. REFERENCES
Chemours, 2019. Chemours Company – Fayetteville Works NPDES Permit #NC0003573.
November 2019.
AECOM, 2018. Poly and Perfluoroalkyl Substance Quality Assurance Project Plan for the
Chemours Corporate Remediation Group. August 2018.
Geosyntec, 2019. Cape Fear River PFAS Loading Reduction Plan. August 2019.
Geosyntec, 2020a. Characterization of PFAS in Process and Non-Process Wastewater and
Stormwater: Initial Characterization – Final Quarterly Report. December 2020.
Geosyntec, 2020c. Matrix Interference During Analysis of Table 3+ Compounds. Chemours
Fayetteville Works. July 2020.
Geosyntec, 2021. Chemours Fayetteville Works Stormwater Capture and Treatment System
Engineering Report. February 2021.

DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7

TR0807E May 2021

TABLES

DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 1
Summary of Wastewater Total Table 3+ Concentration Data Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Location Cateogry Sample Location ID Sample Location Description No. of Samples
----Median Minimum Maximum Median Minimum Maximum
23A-3-ACID Chemours PPA Acid Suit Washing Machines 1 690,000 690,000 690,000 690,000 690,000 690,000
23A-3-NOM Chemours PPA Nomex Suit Washing Machines 1 69,000 69,000 69,000 69,000 69,000 69,000
24D-3-NOM Chemours IXM Building 29 Nomex Suit Washing
Machines 1 29,000 29,000 29,000 30,000 30,000 30,000
AS-1 sludge WWTP Activated Sludge - Solid Residue 3 61,000 37,000 140,000 110,000 58,000 240,000
AS-1 total Whole WWTP Activated Sludge 3 5,500 4,000 7,100 8,600 6,400 11,000
AS-1 filtered Filtered WWTP Activated Sludge 3 630 590 640 1,100 1,100 1,200
22-1 Sanitary Manhole Upsteam of WWTP 1 22,000 22,000 22,000 24,000 24,000 24,000
MH-1 SentryGlas® and PPA Sanitary Effluent 3 15,000 4,000 43,000 16,000 4,100 43,000
MH-4 Chemours IXM Sanitary Effluent 3 15,000 12,000 30,000 39,000 36,000 57,000
LS-1 Central Sanitary Lift Station 3 6,800 5,800 11,000 11,000 8,100 14,000
MH-3 Sanitary Pipe Manhole Upstream of WWTP - Butacite 2 1,800 1,500 10,000 2,600 2,400 20,000
LS-2 DuPont Sanitary Lift Station 3 750 740 1,000 970 740 1,200
MH-2 Kuraray Trosifol and Lab Sanitary Effluent 3 380 340 500 625 550 720
LOC23A Location 23A 15 11,000 800 40,000 15,000 1,300 48,000
22-3 Manhole along Terracotta Pipe prior to WWTP 1 0 0 0 215 215 215
8 WWTP Effluent 15 1,350 200 31,000 1,900 260 36,000
22 WWTP Influent 14 300 93 29,000 760 110 96,000
River Water Intake 1 River water intake at Facility 14 62 0 270 86 0 320
18A-1A Power Station IX#1 Backflow 3 4,400 3,700 5,100 5,000 4,400 5,600
18A-2 Power Stormwater Dike 1 860 860 860 860 860 860
18B Power Station Neutralization Tank 3 450 170 600 690 200 730
18A-3A Power Station Compressor #1 1 0 0 0 0 0 0
18A-3B Power Station Compressor #2 1 0 0 0 0 0 0
18A-3C Power Station Compressor Input #3 1 0 0 0 0 0 0
18A Sump at Power Station 1 0 0 0 120 120 120
18A-1B Power Station Ion Exchange Water #2 4 31 30 140 63 30 140
Total Table 3+ (20 Compounds) (ng/L)
PPE Washing Machines
WWTP Activated Slude
Sanitary Wastewater
Terracotta Pipe
WWTP
Power Area
Total Table 3+ (17 Compounds) (ng/L)
TR0807E Page 1 of 2 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 1
Summary of Wastewater Total Table 3+ Concentration Data Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Location Cateogry Sample Location ID Sample Location Description No. of Samples
----Median Minimum Maximum Median Minimum Maximum
Total Table 3+ (20 Compounds) (ng/L)Total Table 3+ (17 Compounds) (ng/L)
23B Kuraray Lab Effluent 11 140 61 34,000 160 61 36,000
23A-2 Kuraray Laboratory Process Wastewater 1 0 0 0 0 0 0
6B Kuraray Southern Leased Area NCCW Discharge -
Resins Area 12 63 3 150 77 11 150
18 Kuraray Trofisol Manufacturing Process Wastewater 17 36 6 560 44 6 790
23C-1 Kuraray SentryGlas 1 290 2.6 38 603 2.6 150
23C-2 Kuraray Lab 1 255 3.4 46 280 3.4 46
6A Kuraray southern leased area NCCW discharge - Vacuum Condenser 12 78 30 230 100 43 290
19A DuPont process wastewater, PVF Plant 1 13 52 7 970 52 7 980
19B DuPont process wastewater, PVF Plant 2 13 57 5 510 57 5 510
LS-3 DuPont Laboratory Lift Station 3 2,900 290 2,900 2,900 290 2,900
Kuraray
DuPont
TR0807E Page 2 of 2 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 2
Estimated Stormwater Concentration in Areas Draining to the WWTP
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Min Max Median Low High
Dupont EVE Acid 55 55 55 260%0 200
Dupont Hfpo Dimer Acid 760 760 760 68%240 1,300DupontHydro-EVE Acid 63 63 63 190%0 180
Dupont Hydro-PS Acid 52 52 52 69%16 88DupontNVHOS252525110%0 52
Dupont PEPA 440 440 440 130%0 1,000
Dupont PES 2.0 2.0 2.0 1800%0 37DupontPFECA B 2.0 2.0 2.0 2700%0 56
Dupont PFECA-G 2.0 2.0 2.0 420%0 10DupontPFMOAA150150150180%0 420
Dupont PFO2HxA 350 350 350 95%18 680
Dupont PFO3OA 160 160 160 130%0 370DupontPFO4DA150150150140%0 360
Dupont PFO5DA 96 96 96 120%0 210DupontPMPA1,100 1,100 1,100 87%140 2,100
Dupont PS Acid 68 68 68 64%25 110
Dupont R-PSDCA 2.0 2.0 2.0 46%1.1 2.9KurarayEVE Acid 2.0 24 13 260%0 87
Kuraray Hfpo Dimer Acid 140 180 160 68%44 300KurarayHydro-EVE Acid 2.0 28 15 190%0 81
Kuraray Hydro-PS Acid 4.2 30 17 69%1.3 51
Kuraray NVHOS 2.5 54 28 110%0 110KurarayPEPA477963130%0 180
Kuraray PES 2.0 46 24 1800%0 860KurarayPFECA B 2.0 60 31 2700%0 1,700
Kuraray PFECA-G 2.0 41 22 420%0 210
Kuraray PFMOAA 5.0 210 110 180%0 580KurarayPFO2HxA22815295%1.1 160
Kuraray PFO3OA 2.7 58 30 130%0 130KurarayPFO4DA2.7 79 41 140%0 190
Kuraray PFO5DA 4.6 34 19 120%0 74
Kuraray PMPA 190 570 380 87%25 1,100KurarayPS Acid 2.4 27 15 64%0.88 44
Kuraray R-PSDCA 2.0 15 8.5 46%1 22Power Area EVE Acid 2.0 44 23 260%0 160
Power Area Hfpo Dimer Acid 230 5,900 3,100 68%73 9,900
Power Area Hydro-EVE Acid 2.1 120 61 190%0 350Power Area Hydro-PS Acid 15 89 52 69%4.7 150
Power Area NVHOS 6.3 54 30 110%0 110Power Area PEPA 110 1,100 610 130%0 2,500
Power Area PES 2 46 24 1800%0 860
Power Area PFECA B 2 60 31 2700%0 1,700Power Area PFECA-G 2 41 22 420%0 210
Power Area PFMOAA 32 350 190 180%0 970Power Area PFO2HxA 51 310 180 95%2.6 600
Power Area PFO3OA 9 180 95 130%0 410
Power Area PFO4DA 8.6 240 120 140%0 570Power Area PFO5DA 11 110 61 120%0 240
Power Area PMPA 350 2,800 1,600 87%45 5,200Power Area PS Acid 19 58 39 64%6.9 95
Site Area Parameter Measured Stormwater Concentration (ng/L)90% CI %
of Median
Estimated Range of
Stormwater
Concentrations (ng/L)
TR0807E Page 1 of 2 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 2
Estimated Stormwater Concentration in Areas Draining to the WWTP
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Min Max Median Low High
Site Area Parameter Measured Stormwater Concentration (ng/L)90% CI %
of Median
Estimated Range of
Stormwater
Concentrations (ng/L)
Power Area R-PSDCA 2 15 8.5 46%1.1 22
WWTP EVE Acid 24 47 36 260%0 170WWTPHfpo Dimer Acid 100 1,600 850 68%32 2,700
WWTP Hydro-EVE Acid 28 56 42 190%0 160WWTPHydro-PS Acid 220 1,700 960 69%69 2,900
WWTP NVHOS 54 380 220 110%0 790
WWTP PEPA 47 500 270 130%0 1,100WWTPPES2.0 46 24 1800%0 860
WWTP PFECA B 2.0 60 31 2700%0 1,700WWTPPFECA-G 2.0 41 22 420%0 210
WWTP PFMOAA 210 12,000 6,100 180%0 33,000
WWTP PFO2HxA 130 2,400 1,300 95%7 4,700WWTPPFO3OA581,300 680 130%0 3,000
WWTP PFO4DA 79 1,000 540 140%0 2,400WWTPPFO5DA95700400120%0 1,500
WWTP PMPA 570 970 770 87%74 1,800
WWTP PS Acid 27 160 94 64%10 260WWTPR-PSDCA 5.0 29 17 46%2.7 42
Dupont Total Table 3+ (17)1,500 4,100 2,800 82%270 7,500KurarayTotal Table 3+ (17)600 1,600 1,100 82%110 2,900
Power Area Total Table 3+ (17)1,900 11,000 6,500 82%350 20,000
WWTP Total Table 3+ (17)5,300 21,000 13,000 82%970 38,000
Notes:
4 - Total Table 3+ (17 Compounds) does not include R-PSDA, Hydrolyzed PSDA and R-EVE.
CI - Confidence IntervalMin - Minimum
Max - Maximumng/L - nanograms per liter
WWTP - Wastewater Treatment Plant
3 - Total Table 3+ was calculated including J qualified data but not non-detect data. The total Table 3+ sum is rounded
to two significant figures.
1 - To account for the expected variation in PFAS concentrations in stormwater, the variability of estimated stormwater
concentrations at Outfall 002 (as described in Geosyntec, 2019) was calculated and applied. The "90% CI % of median"
represents the 90% confidence interval, as a precentage relative to the median concentration, of estimated stormwater
concentrations at Outfall 002, based on sample results at Outfall 002 from May 2019 through February 2021.
2 - The 90% CI for Outfall 002 stormwater concentrations (as percentages of the median) were applied to the minimum
and maximum measured representative stormwater concentrations in each of the site areas draining to the WWTP, to
determine an estimated low and high stormwater concentration, respectively.
TR0807E Page 2 of 2 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event June 2020 June 2020 June 2020 June 2020
Location Description River water intake at
Facility WWTP Effluent day 1 WWTP Effluent day 2 WWTP Effluent day 3
Location ID 1 8 8 8
Field Sample ID WWTP_LOC1_060520 WWTP_LOC8_060420 WWTP_LOC8_060520 WWTP_LOC8_060620
Sample Date 6/5/2020 6/4/2020 6/5/2020 6/6/2020QA/QC --------Analytical Laboratory On-site laboratory On-site laboratory On-site laboratory On-site laboratory
Units ng/L ng/L ng/L ng/LTable 3+ SOP (ng/L)
HFPO-DA < 100 199 198 245
PFMOAA < 100 378 1314 366PFO2HxA< 100 114 279 107
PFO3OA < 100 < 100 < 100 < 100PFO4DA< 100 < 100 < 100 < 100
PFO5DA < 100 < 100 < 100 < 100PMPA< 100 < 100 < 100 < 100PEPA< 500 < 500 < 500 < 500
PS Acid < 100 < 100 < 100 < 100Hydro-PS Acid < 100 147 153 148
R-PSDA < 100 103 < 100 < 100Hydrolyzed PSDA < 100 611 711 643
R-PSDCA < 100 < 100 < 100 < 100NVHOS< 500 < 500 < 500 < 500
EVE Acid < 100 < 100 < 100 < 100Hydro-EVE Acid < 100 < 100 < 100 < 100R-EVE < 100 < 100 < 100 < 100
PES < 100 < 100 < 100 < 100PFECA B < 100 < 100 < 100 < 100
PFECA-G < 100 < 100 < 100 < 100
Total Table 3+ Compounds (17 compounds)1,2 ND 840 1,900 870
Total Table 3+ Compounds (20 compounds)1 ND 1,600 2,700 1,500
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< -Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
TR0807E Page 1 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
June 2020 June 2020 June 2020 June 2020
WWTP Effluent day 5 WWTP Effluent day 6 WWTP Effluent day 7 WWTP Effluent day 8
8 8 8 8
WWTP_LOC8_060820 WWTP_LOC8_060920 WWTP_LOC8_061020 WWTP_LOC8_061120
6/8/2020 6/9/2020 6/10/2020 6/11/2020--------
On-site laboratory On-site laboratory On-site laboratory On-site laboratory
ng/L ng/L ng/L ng/L
226 210 241 205
282 308 654 1310
< 100 < 100 140 271
< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100
< 500 < 500 < 500 < 500
< 100 < 100 < 100 < 100
155 161 154 145
< 100 < 100 < 100 < 100712710729636
< 100 < 100 < 100 < 100< 500 < 500 < 500 < 500
< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100
660 680 1,200 1,900
1,400 1,400 1,900 2,600
TR0807E Page 2 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
June 2020 June 2020 June 2020 June 2020
WWTP Effluent day 9 WWTP Effluent day
10
WWTP Effluent day
11
WWTP Effluent day
12
8 8 8 8
WWTP_LOC8_061220 WWTP_LOC8_061320 WWTP_LOC8_061420 WWTP_LOC8_061520
6/12/2020 6/13/2020 6/14/2020 6/15/2020--------On-site laboratory On-site laboratory On-site laboratory On-site laboratory
ng/L ng/L ng/L ng/L
215 262 241 229
256 214 409 7405< 100 < 100 111 1360
< 100 < 100 < 100 370< 100 < 100 < 100 122
< 100 < 100 < 100 < 100< 100 < 100 < 100 178
< 500 < 500 < 500 < 500
< 100 < 100 < 100 < 100129118129194
< 100 < 100 < 100 1375665495781228
< 100 < 100 < 100 < 100< 500 < 500 < 500 < 500
< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100
600 590 890 9,900
1,200 1,100 1,500 11,000
TR0807E Page 3 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
June 2020 June 2020 June 2020 June 2020
WWTP Effluent day
13
WWTP Effluent day
14
WWTP Effluent day
14 duplicate
Kuraray Trofisol manufacturing process
wastewater
8 8 8 18
WWTP_LOC8_061620 WWTP_LOC8_061720 WWTP_LOC8_061720_D WWTP_LOC18_060520
6/16/2020 6/17/2020 6/17/2020 6/5/2020----Field Duplicate --On-site laboratory On-site laboratory On-site laboratory On-site laboratory
ng/L ng/L ng/L ng/L
270 295 288 < 100391413400< 100122135134< 100
< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100157175194< 100
< 500 < 500 < 500 < 500
< 100 < 100 < 100 < 100158119133< 100
111 < 100 < 100 < 100747639644< 100
< 100 < 100 < 100 < 100< 500 < 500 < 500 < 500
< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100
1,100 1,100 1,100 ND
2,000 1,800 1,800 ND
TR0807E Page 4 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
June 2020 June 2020 June 2020 June 2020
WWTP Influent day 1 WWTP Influent day 2 WWTP Influent day 3 WWTP Influent day 5
22 22 22 22
WWTP_LOC22_060420 WWTP_LOC22_060520 WWTP_LOC22_060620 WWTP_LOC22_060820
6/4/2020 6/5/2020 6/6/2020 6/8/2020--------On-site laboratory On-site laboratory On-site laboratory On-site laboratory
ng/L ng/L ng/L ng/L
< 100 < 100 < 100 278
< 100 < 100 < 100 102< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100
< 500 < 500 < 500 < 500
< 100 < 100 < 100 298< 100 < 100 202 115
< 100 < 100 < 100 < 100263279469450
< 100 < 100 < 100 < 100< 500 < 500 < 500 < 500
< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100
ND ND 200 790
260 280 670 1,200
TR0807E Page 5 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
June 2020 June 2020 June 2020 June 2020
WWTP Influent day 6 WWTP Influent day 7 WWTP Influent day 8 WWTP Influent day 9
22 22 22 22
WWTP_LOC22_060920 WWTP_LOC22_061020 WWTP_LOC22_061120 WWTP_LOC22_061220
6/9/2020 6/10/2020 6/11/2020 6/12/2020--------On-site laboratory On-site laboratory On-site laboratory On-site laboratory
ng/L ng/L ng/L ng/L
< 100 107 253 505
< 100 < 100 134 < 100< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100< 500 < 500 < 500 < 500
150 < 100 176 < 100< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100348392283785
< 100 < 100 < 100 < 100< 500 < 500 < 500 < 500
< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100
150 110 560 510
500 500 850 1,300
TR0807E Page 6 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
June 2020 June 2020 June 2020 June 2020
WWTP Influent day 10 WWTP Influent day 11 WWTP Influent day 12 WWTP Influent day 13
22 22 22 22
WWTP_LOC22_061320 WWTP_LOC22_061420 WWTP_LOC22_061520 WWTP_LOC22_061620
6/13/2020 6/14/2020 6/15/2020 6/16/2020--------On-site laboratory On-site laboratory On-site laboratory On-site laboratory
ng/L ng/L ng/L ng/L
223 < 100 1371 411
136 < 100 327 577< 100 < 100 132 185
< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100
< 100 < 100 109 < 100< 500 < 500 705 < 500
< 100 106 301 153113119244105
< 100 < 100 < 100 < 1007588111137435
< 100 < 100 < 100 < 100< 500 < 500 < 500 < 500
< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100
470 230 3,200 1,400
1,200 1,000 4,300 1,900
TR0807E Page 7 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
June 2020 June 2020 June 2020 March 2021
WWTP Influent day 14 Sump at Power Station Power Station ion exchange water - Input
#1
Power Station IX#1
Backflow
22 18A 18A-1A 18A-1A
WWTP_LOC22_061720 WWTP_LOC18A_060520 WWTP_LOC18A_1A_060520 WWTP-18A-1A-031021
6/17/2020 6/5/2020 6/5/2020 3/10/2021--------On-site laboratory On-site laboratory On-site laboratory Enthalpy
ng/L ng/L ng/L ng/L
175 < 100 124 930
784 < 100 < 100 1020235< 100 124 731
102 < 100 < 100 124< 100 < 100 < 100 <75
< 100 < 100 < 100 <75
< 100 < 100 < 100 1700< 500 < 500 < 500 546
127 < 100 < 100 <25109< 100 < 100 <25
< 100 < 100 < 100 <25377123< 100 374
< 100 < 100 < 100 <25< 500 < 500 < 500 86.8
< 100 < 100 < 100 <25
< 100 < 100 < 100 <25< 100 < 100 < 100 108
< 100 < 100 < 100 <25< 100 < 100 < 100 <25
< 100 < 100 < 100 <25
1,500 ND 250 5,100
1,900 120 250 5,600
TR0807E Page 8 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
March 2021 June 2020 March 2021 March 2021
Power Station IX#1
Backflow
Power Station ion exchange water - Input
#2
Power Station ion
exchange water #2
Power Station ion
exchange water #2
18A-1A 18A-1B 18A-1B 18A-1B
WWTP-18A-1A-031121 WWTP_LOC18A_1B_060520 WWTP-18A-1B-030621 WWTP-18A-1B-030921
3/11/2021 6/5/2020 3/6/2021 3/9/2021--------Enthalpy On-site laboratory Enthalpy Enthalpy
ng/L ng/L ng/L ng/L
732 < 100 <25 <25
1010 < 100 <25 <25653< 100 <25 <25
112 < 100 <25 <25<75 < 100 <75 <75
<75 < 100 <75 <75
939 < 100 31.2 J 29.5 J237< 500 <25 <25
<25 < 100 <25 <25<25 < 100 <25 <25
438 < 100 <25 <25266< 100 31.4 J <25
<25 < 100 <25 <25<25 < 500 <25 <25
<25 < 100 <25 <25
<25 < 100 <25 <2546.6 J < 100 <25 <25
<25 < 100 <25 <25<25 < 100 <25 <25
<25 < 100 <25 <25
3,700 ND 31 30
4,400 ND 63 30
TR0807E Page 9 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
March 2021 June 2020 June 2020 June 2020
Power Station ion
exchange water #2
Power Station dike
area stormwater
Power Station compressor cooling
water - Input #1
Power Station compressor cooling
water - Input #2
18A-1B 18A-2 18A-3A 18A-3B
WWTP-18A-1B-031121 WWTP_LOC18A_2_060520 WWTP_LOC18A_3A_060520 WWTP_LOC18A_3B_060520
3/11/2021 6/5/2020 6/5/2020 6/5/2020--------Enthalpy On-site laboratory On-site laboratory On-site laboratory
ng/L ng/L ng/L ng/L
27.4 J 527 < 100 < 100
<25 < 100 < 100 < 10040.2 J 134 < 100 < 100
<25 < 100 < 100 < 100<75 < 100 < 100 < 100
<75 < 100 < 100 < 10069.6 202 < 100 < 100<25 < 500 < 500 < 500
<25 < 100 < 100 < 100<25 < 100 < 100 < 100
<25 < 100 < 100 < 100<25 < 100 < 100 < 100
<25 < 100 < 100 < 100<25 < 500 < 500 < 500
<25 < 100 < 100 < 100<25 < 100 < 100 < 100<25 < 100 < 100 < 100
<25 < 100 < 100 < 100<25 < 100 < 100 < 100
<25 < 100 < 100 < 100
140 860 ND ND
140 860 ND ND
TR0807E Page 10 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
June 2020 June 2020 March 2021 March 2021
Power Station compressor cooling
water - Input #3
Neutralization tank at
Power Station
Power Station
Neutralization Tank
Power Station
Neutralization Tank
18A-3C 18B 18B 18B
WWTP_LOC18A_3C_060520 WWTP_LOC18B_060520 WWTP-18B-24-030521 WWTP-18B-24-031021
6/5/2020 6/5/2020 3/5/2021 3/10/2021--------On-site laboratory On-site laboratory Enthalpy Enthalpy
ng/L ng/L ng/L ng/L
< 100 < 100 63.1 34 J
< 100 < 100 104 54.9< 100 < 100 84.6 25.9 J
< 100 < 100 <25 <25< 100 < 100 <75 <75
< 100 < 100 <75 <75
< 100 < 100 150 56.4
< 500 < 500 43.4 J <25
< 100 < 100 <25 <25< 100 < 100 <25 <25
< 100 < 100 <25 <25< 100 130 245 25.7 J
< 100 < 100 <25 <25< 500 < 500 <25 <25
< 100 < 100 <25 <25
< 100 < 100 <25 <25
< 100 < 100 <25 <25
< 100 < 100 <25 <25< 100 < 100 <25 <25
< 100 < 100 <25 <25
ND ND 450 170
ND 130 690 200
TR0807E Page 11 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
March 2021 March 2021 June 2020 June 2020
Power Station
Neutralization Tank
Power Station
Neutralization Tank
DuPont process wastewater, PVF Plant
1
DuPont process wastewater, PVF Plant
2
18B 18B 19A 19B
WWTP-18B-24-031021-D WWTP-18B-5-031121 WWTP_LOC19A_060420 WWTP_LOC19B_060420
3/10/2021 3/11/2021 6/4/2020 6/4/2020Field Duplicate ------Enthalpy Enthalpy On-site laboratory On-site laboratory
ng/L ng/L ng/L ng/L
<25 107 < 100 < 100
54.4 162 < 100 < 10026.3 J 119 < 100 < 100
<25 <25 < 100 < 100<75 <75 < 100 < 100
<75 <75 < 100 < 10059.9 176 < 100 < 100<25 39.8 J < 500 < 500
<25 <25 < 100 < 100<25 <25 < 100 < 100
<25 <25 < 100 < 10029 J 124 < 100 < 100
<25 <25 < 100 < 100<25 <25 < 500 < 500
<25 <25 < 100 < 100<25 <25 < 100 < 100<25 <25 < 100 < 100
<25 <25 < 100 < 100<25 <25 < 100 < 100
<25 <25 < 100 < 100
140 600 ND ND
170 730 ND ND
TR0807E Page 12 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
June 2020 June 2020 June 2020 June 2020
Manhole along Sanitary Sewer prior
to WWTP
DuPont sanitary sewer
prior to WWTP
Manhole along Terracotta Pipe prior
to WWTP
Manhole along Terracotta Pipe prior
to WWTP duplicate
22-1 22-2 22-3 22-3
WWTP_LOC22_1_060420 WWTP_LOC22_2_060420 WWTP_LOC22_3_060520 WWTP_LOC22_3_060520_D
6/4/2020 6/4/2020 6/5/2020 6/5/2020------Field DuplicateOn-site laboratory On-site laboratory On-site laboratory On-site laboratory
ng/L ng/L ng/L ng/L
13880 < 100 < 100 < 100541< 100 < 100 < 100542< 100 < 100 < 100
255 < 100 < 100 < 100183< 100 < 100 < 100
173 < 100 < 100 < 1003,945 1,067 < 100 < 100
2,173 < 500 < 500 < 500
412 < 100 < 100 < 100204< 100 < 100 < 100
1,412 < 100 < 100 < 100372< 100 216 213
< 100 < 100 < 100 < 100< 500 < 500 < 500 < 500
< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100
144 < 100 < 100 < 100
< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100
22,000 1,100 ND ND
24,000 1,100 220 210
TR0807E Page 13 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
June 2020 June 2020 June 2020 June 2020
Manhole along
Terracotta Pipe
Kuraray laboratory
process wastewater
Chemours PPA acid
suit washing machines
Chemours PPA nomex
suit washing machines
23A 23A-2 23A-3-ACID 23A-3-NOM
WWTP_LOC23A_060520 WWTP_LOC23A_2_060520 WWTP_LOC23A_3_ACID_060420 WWTP_LOC23A_3_NOM_060420
6/5/2020 6/5/2020 6/4/2020 6/4/2020--------On-site laboratory On-site laboratory On-site laboratory On-site laboratory
ng/L ng/L ng/L ng/L
513 < 100 689429 68683
1798 < 100 < 100 < 100459< 100 137 < 100
167 < 100 < 100 < 100< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100
< 100 < 100 256 127< 500 < 500 < 500 < 500
31027 < 100 < 100 < 1001200< 100 < 100 < 100
331 < 100 138 < 1009967< 100 < 100 < 100
< 100 < 100 < 100 < 100< 500 < 500 < 500 < 500461< 100 < 100 < 100
< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100
< 100 < 100 < 100 < 100
36,000 ND 690,000 69,000
46,000 ND 690,000 69,000
TR0807E Page 14 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
June 2020 May/June 2020 May/June 2020Chemours Monomers
IXM Building 29
nomex suit washing machines
WWTP Activated Sludge WWTP Activated Sludge
24D-3-NOM AS-1 Filtrate AS-1 Solids
WWTP_LOC24D_3_NOM_060420 TestAmerica TestAmerica
6/4/2020 6/4/2020 6/4/2020
------On-site laboratory TestAmerica TestAmerica
ng/L ng/L ng/kg----
761 220 <1,000
890 120 21002656068<1,000
282 39 <1,00020921<1,0001258270044697<1,000< 500 35 <1,000
< 100 2 100001541645000
755 77 6100< 100 510 38000
< 100 <2 <1,000< 500 15 1500
< 100 <2 <1,000< 100 3 <1,000< 100 5 <1,000
< 100 <2 <1,000< 100 <2 <1,000
< 100 <2 <1,000
29,000 640 61,000
30,000 1,200 110,000
TR0807E Page 15 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
May/June 2020 May/June 2020 May/June 2020
WWTP Activated Sludge WWTP Activated Sludge WWTP Activated Sludge
AS-1 Total AS-1 Filtrate AS-1 Solids
TestAmerica TestAmerica TestAmerica
6/4/2020 6/4/2020 6/4/2020
------TestAmerica TestAmerica TestAmerica
ng/kg ng/L ng/kg------
<1,000 220 <1,000
<1,000 110 <1,000<1,000 73 <1,000
<1,000 33 <1,000<1,000 18 <1,000
<1,000 13 1900<1,000 69 <1,000
<1,000 32 <1,000
1500 3 630056003828000
<1,000 53 3000340037018000
<1,000 <2 <1,000<1,000 15 1000
<1,000 <2 <1,000<1,000 3 <1,000
<1,000 2 <1,000
<1,000 <2 <1,000<1,000 <2 <1,000
<1,000 <2 <1,000
7,100 630 37,000
11,000 1,100 58,000
TR0807E Page 16 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
May/June 2020 May/June 2020 May/June 2020
WWTP Activated Sludge WWTP Activated Sludge WWTP Activated Sludge
AS-1 Total AS-1 Filtrate AS-1 Solids
TestAmerica TestAmerica TestAmerica
6/4/2020 6/4/2020 6/4/2020
------TestAmerica TestAmerica TestAmerica
ng/kg ng/L ng/kg------
<1,000 210 1500
<1,000 110 5100<1,000 69 1700
<1,000 34 1600<1,000 16 2300
<1,000 9 5700<1,000 69 <1,000
<1,000 32 <1,000
1000 2 2100045002594000
<1,000 60 13000310040091000
<1,000 <2 2000<1,000 14 4300
<1,000 <2 <1,000<1,000 2 <1,000
<1,000 3 <1,000
<1,000 <2 <1,000<1,000 <2 <1,000
<1,000 <2 <1,000
5,500 590 140,000
8,600 1,100 240,000
TR0807E Page 17 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
May/June 2020 March 2021 March 2021
WWTP Activated Sludge Central Sanitary Lift
Station
Central Sanitary Lift
Station
AS-1 Total LS-1-24 LS-1-24
TestAmerica WWTP-LS-1-24-030521 WWTP-LS-1-24-0310216/4/2020 3/5/2021 3/10/2021------TestAmerica Enthalpy Enthalpy
ng/kg ng/L ng/L--
<1,000 2620 4840
<1,000 1770 754<1,000 608 259
<1,000 191 74.6<1,000 <75 <75
<1,000 <75 <75
<1,000 347 267
<1,000 69.6 77.1
<1,000 139 2874000<25 112
<1,000 797 1640240013102800
<1,000 <25 <25<1,000 32.4 J 42.1 J
<1,000 <25 70.9
<1,000 <25 36.7 J
<1,000 198 189
<1,000 <25 <25<1,000 <25 <25
<1,000 <25 <25
4,000 5,700 6,800
6,400 8,100 11,000
TR0807E Page 18 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
March 2021 March 2021 March 2021 March 2021
Central Sanitary Lift
Station
Central Sanitary Lift
Station
DuPont Sanitary Lift
Station
DuPont Sanitary Lift
Station
LS-1-24 LS-1-24 LS-2-24 LS-2-24
WWTP-LS-1-24-031221 WWTP-LS-1-24-031221-D WWTP-LS-2-24-030521 WWTP-LS-2-24-031021
3/12/2021 3/12/2021 3/5/2021 3/10/2021--Field Duplicate ----Enthalpy Enthalpy Enthalpy Enthalpy
ng/L ng/L ng/L ng/L
9000 8690 107 108
600 565 54.4 32 J31530660.1 46.9 J
132 126 <25 <25<75 <75 <75 <75
<75 <75 <75 <75
314 312 414 44058.3 56 117 115
318 327 <25 <2556.9 47.3 J <25 <25
811 866 146 <252250224042.3 J <25
<25 <25 <25 <2529.8 J <25 <25 <2529.6 J 26.7 J <25 <25
<25 <25 <25 <2519222027.3 J <25
<25 <25 <25 <25<25 <25 <25 <25
<25 <25 <25 <25
11,000 10,000 750 740
14,000 14,000 970 740
TR0807E Page 19 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
March 2021 March 2021 March 2021 March 2021
DuPont Sanitary Lift
Station
DuPont Laboratory
Lift station
DuPont Laboratory
Lift station
DuPont Laboratory
Lift station
LS-2-24 LS-3-PVF LS-3-PVF LS-3-PVF
WWTP-LS-2-24-031221 WWTP-LS-3-PVF-031121 WWTP-LS-3-PVF-031621 WWTP-LS-3-PVF-031821
3/12/2021 3/11/2021 3/16/2021 3/18/2021--------Enthalpy Enthalpy Enthalpy Enthalpy
ng/L ng/L ng/L ng/L
116 <25 134 166000
53.8 <25 <25 233042.1 J <25 <25 2930
<25 <25 <25 313<75 <75 <75 145
<75 <75 <75 <75
615 226 2040 1740017168.4 680 4850
<25 <25 <25 <25<25 <25 <25 166
142 <25 <25 67539.5 J <25 <25 15100
<25 <25 <25 <25<25 <25 <25 639
<25 <25 <25 <25
<25 <25 <25 16539.1 J <25 <25 219
<25 <25 <25 <25<25 <25 <25 <25
<25 <25 <25 <25
1000 290 2,900 190,000
1,200 290 2,900 210,000
TR0807E Page 20 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
March 2021 March 2021 March 2021 March 2021
SentryGlas® and PPA
Sanitary Effluent
SentryGlas® and PPA
Sanitary Effluent
SentryGlas® and PPA
Sanitary Effluent
Kuraray Trosifol and
Lab Sanitary Effluent
MH-1 MH-1 MH-1 MH-2-24
WWTP-MH-1-24-030521 WWTP-MH-1-24-031021 WWTP-MH-1-5-031121 WWTP-MH-2-24-030521
3/5/2021 3/10/2021 3/11/2021 3/5/2021--------Enthalpy Enthalpy Enthalpy Enthalpy
ng/L ng/L ng/L ng/L
3730 15200 42700 50.9
52 43.9 J 49.2 J 43.7 J30.2 J <25 <25 28 J
<25 <25 <25 <25<75 <75 <75 <75
<75 <75 <75 <75
170 151 179 239<25 <25 30.1 J 29.7 J
<25 <25 <25 <25<25 <25 <25 <25
<25 <25 123 J 158111115115136
<25 <25 <25 <25<25 <25 <25 <25
<25 <25 <25 <25
<25 <25 <25 <25<25 <25 <25 38.6 J
<25 <25 <25 <25<25 <25 <25 <25
<25 <25 <25 <25
4,000 15,000 43,000 390
4,100 16,000 43,000 720
TR0807E Page 21 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
March 2021 March 2021 March 2021 March 2021
Kuraray Trosifol and
Lab Sanitary Effluent
Kuraray Trosifol and
Lab Sanitary Effluent
Kuraray Trosifol and
Lab Sanitary Effluent
Sanitary Pipe Manhole Upstream of WWTP -
Butacite
MH-2-24 MH-2-24 MH-2-24 MH-3
WWTP-MH-2-24-030521-D WWTP-MH-2-24-031021 WWTP-MH-2-24-031221 WWTP-MH-3-030521
3/5/2021 3/10/2021 3/12/2021 3/5/2021--------Enthalpy Enthalpy Enthalpy Enthalpy
ng/L ng/L ng/L ng/L
66.6 39.4 J <25 745
27.4 J 31.5 J 34.2 J 387<25 <25 <25 95.8
<25 <25 <25 31.9 J<75 <75 <75 <75
<75 <75 <75 <75
246 429 296 160<25 <25 <25 32 J
<25 <25 40.3 J 62.9<25 <25 <25 <25
233 <25 165 50889.1 46.3 J 56.7 335
<25 <25 <25 <25<25 <25 <25 <25
<25 <25 <25 <25
<25 <25 <25 <25<25 <25 <25 75.1
<25 <25 <25 <25<25 <25 <25 <25
<25 <25 <25 <25
340 500 370 1,500
660 550 590 2,400
TR0807E Page 22 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
March 2021 March 2021 March 2021 March 2021
Sanitary Pipe Manhole Upstream of WWTP -
Butacite
Sanitary Pipe Manhole Upstream of WWTP -
Butacite
Chemours IXM
Sanitary Effluent
Chemours IXM
Sanitary Effluent
MH-3 MH-3 MH-4-24 MH-4-24
WWTP-MH-3-24-031021 WWTP-MH-3-17-031221 WWTP-MH-24-4-030521 WWTP-MH-4-24-031021
3/10/2021 3/12/2021 3/5/2021 3/10/2021--------Enthalpy Enthalpy Enthalpy Enthalpy
ng/L ng/L ng/L ng/L
1170 5110 2710 7200
201 2010 16500 307015360245601120
39.4 J 222 1060 272<75 93.1 J 430 95.8 J
<75 <75 270 200
166 477 992 77734.7 J 130 302 284
63.1 1000 2140 1580<25 140 375 304
202 2210 6820 560050272301910013800
<25 <25 35.6 J 34.7 J<25 62.7 165 139
<25 78.7 103 271
<25 35.1 J 78.7 11345.4 J 446 1290 709
<25 <25 43.3 J <25<25 <25 <25 <25
<25 <25 <25 <25
1,800 9,900 30,000 15,000
2,600 20,000 57,000 36,000
TR0807E Page 23 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
March 2021 April/May 2021 April/May 2021 April/May 2021
Chemours IXM
Sanitary Effluent Kuraray SentryGlas Kuraray SentryGlas Kuraray Lab
MH-4-24 23C-1 23C-1 23C-2
WWTP-MH-4-24-031221 STW-LOC-23C-1-050421 STW-LOC-23C-1-050421-D STW-LOC-23C-2-042621
3/12/2021 05/04/2021 05/04/2021 04/26/2021----Field Duplicate --Enthalpy TestAmerica TestAmerica TestAmerica
ng/L ng/L ng/L ng/L
3440 26 27 27
3700 7.4 6.8 241010202024
340 4.5 4.5 3.41592.8 2.6 <2.0157<2.0 <2.0 <2.0
590 36 34 46210<20 <20 <20
1840 38 38 <2.02602.9 3 <2.0
8970 15 18 <2.0162001301507.9
33.9 J <2.0 <2.0 <2.01085.2 5.5 4.3162<2.0 <2.0 <2.0
76.3 3.1 2.8 <2.01370<2.0 <2.0 <2.0
<25 <2.0 <2.0 <2.0<25 <2.0 <2.0 <2.0
<25 <2.0 <2.0 <2.0
12,000 150 140 130
39,000 290 310 140
TR0807E Page 24 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
April/May 2021 June 2020 June 2020 June 2020
Kuraray Lab Equipment Blank - Dip
Rod Equipment Blank - ##Equipment Blank -
Autosampler
23C-2 EB EB EB
STW-LOC-23C-2-042621-D WWTP_EB_DR_060420 WWTP_EB_PP_060420 WWTP_EB_ISCO_060420
04/26/2021 6/4/2020 6/4/2020 6/4/2020Field Duplicate Equipment Blank Equipment Blank Equipment BlankTestAmericaOn-site laboratory On-site laboratory On-site laboratory
ng/L ng/L ng/L ng/L
28 < 100 < 100 < 100
25 < 100 < 100 < 10024< 100 < 100 < 100
3.7 < 100 < 100 < 100<2.0 < 100 < 100 < 100
<2.0 < 100 < 100 < 100
41 < 100 < 100 < 100<20 < 500 < 500 < 500
<2.0 < 100 < 100 < 100<2.0 < 100 < 100 < 100
8.6 J < 100 < 100 < 1007.9 < 100 < 100 < 100
<2.0 < 100 < 100 < 1004.7 < 500 < 500 < 500
<2.0 < 100 < 100 < 100
<2.0 < 100 < 100 < 100<2.0 < 100 < 100 < 100
<2.0 < 100 < 100 < 100<2.0 < 100 < 100 < 100
<2.0 < 100 < 100 < 100
130 ND ND ND
140 ND ND ND
TR0807E Page 25 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
June 2020 June 2020 March 2021 March 2021
Equipment Blank -
Autosampler
Equipment Blank -
Autosampler
Equipment Blank -
Autosampler
Equipment Blank -
Autosampler
EB EB EB EB
WWTP_EB_ISCO_061020 WWTP_EB_ISCO_061820 WWTP-EQBLK-IS-030521 WWTP-EQBLK-IS-031021
6/10/2020 6/18/2020 3/5/2021 3/10/2021Equipment Blank Equipment Blank Equipment Blank Equipment BlankOn-site laboratory On-site laboratory Enthalpy Enthalpy
ng/L ng/L ng/L ng/L
< 100 < 100 <25 <25
< 100 < 100 <25 <25< 100 < 100 <25 <25
< 100 < 100 <25 <25< 100 < 100 <75 <75
< 100 < 100 <75 <75
< 100 < 100 <25 <25< 500 < 500 <25 <25
< 100 < 100 <25 <25< 100 < 100 <25 <25
< 100 < 100 <25 <25< 100 < 100 <25 <25
< 100 < 100 <25 <25< 500 < 500 <25 <25
< 100 < 100 <25 <25
< 100 < 100 <25 <25< 100 < 100 <25 <25
< 100 < 100 <25 <25< 100 < 100 <25 <25
< 100 < 100 <25 <25
ND ND ND ND
ND ND ND ND
TR0807E Page 26 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
March 2021 March 2021 June 2020 June 2020
Equipment Blank -
Autosampler
Equipment Blank -
Autosampler Field Blank Field Blank
EB EB FB FB
WWTP-EQBLK-IS-031121 WWTP-EQBLK-PP-031121 WWTP_FB_060420 WWTP_FB_061820
3/11/2021 3/11/2021 6/4/2020 6/18/2020Equipment Blank Equipment Blank Field Blank Field BlankEnthalpyEnthalpyOn-site laboratory On-site laboratory
ng/L ng/L ng/L ng/L
<25 <25 < 100 < 100
<25 <25 < 100 < 100<25 <25 < 100 < 100
<25 <25 < 100 < 100<75 <75 < 100 < 100
<75 <75 < 100 < 100
<25 <25 < 100 < 100<25 <25 < 500 < 500
<25 <25 < 100 < 100<25 <25 < 100 < 100
<25 <25 < 100 < 100<25 <25 < 100 < 100
<25 <25 < 100 < 100<25 <25 < 500 < 500
<25 <25 < 100 < 100
<25 <25 < 100 < 100<25 <25 < 100 < 100
<25 <25 < 100 < 100<25 <25 < 100 < 100
<25 <25 < 100 < 100
ND ND ND ND
ND ND ND ND
TR0807E Page 27 of 29 May 2021
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TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
March 2021 March 2021 March 2021 April/May 2021
Field Blank Field Blank Field Blank Trip Blank
FB FB FB TB
WWTP-FBLK-030421 WWTP-FBLK-031021 WWTP-FBLK-031121 STW-LOC-TB-042621
3/4/2021 3/10/2021 3/11/2021 04/26/2021Field Blank Field Blank Field Blank Trip BlankEnthalpyEnthalpyEnthalpyTestAmerica
ng/L ng/L ng/L ng/L
<25 <25 <25 <2.0
<25 <25 <25 <2.0<25 <25 <25 <2.0
<25 <25 <25 <2.0<75 <75 <75 <2.0
<75 <75 <75 <2.0
<25 <25 <25 <10<25 <25 <25 <20
<25 <25 <25 <2.0<25 <25 <25 <2.0
<25 <25 <25 <2.0<25 <25 <25 <2.0
<25 <25 <25 <2.0<25 <25 <25 <2.0
<25 <25 <25 <2.0
<25 <25 <25 <2.0<25 <25 <25 <2.0
<25 <25 <25 <2.0<25 <25 <25 <2.0
<25 <25 <25 <2.0
ND ND ND ND
ND ND ND ND
TR0807E Page 28 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
TABLE 3
June 2020 and March to April 2021 Sampling Events Analytical Results
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Event
Location Description
Location ID
Field Sample ID
Sample DateQA/QCAnalytical Laboratory
UnitsTable 3+ SOP (ng/L)
HFPO-DA
PFMOAAPFO2HxA
PFO3OAPFO4DA
PFO5DA
PMPAPEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCANVHOS
EVE Acid
Hydro-EVE AcidR-EVE
PESPFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)1,2
Total Table 3+ Compounds (20 compounds)1
Notes:
2 - Total Table 3+ (17 Compounds) does not
include R-PSDA, Hydrolyzed PSDA and R-EVEBold - Analyte detected above associated reporting
limitJ - Analyte detected. Reported value may not be
accurate or preciseND - No Table 3+ compounds were detected above
their associated reporting limits.
ng/L - nanograms per liter
ng/kg - nanograms per kilogram
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting
limit.
1 - Total Table 3+ was calculated including J
qualified data but not non-detect data. The total
Table 3+ sum is rounded to two significant figures.
April/May 2021 April/May 2021
Equipment Blank -
Autosampler Field Blank
EB FB
STW-LOC-EB-042621 STW-LOC-FB-042621
04/26/2021 04/26/2021Equipment Blank Field BlankTestAmericaTestAmerica
ng/L ng/L
<2.0 <2.0
<2.0 <2.0<2.0 <2.0
<2.0 <2.0<2.0 <2.0
<2.0 <2.0
<10 <10<20 <20
<2.0 <2.0<2.0 <2.0
<2.0 <2.0<2.0 <2.0
<2.0 <2.0<2.0 <2.0
<2.0 <2.0
<2.0 <2.0<2.0 <2.0
<2.0 <2.0<2.0 <2.0
<2.0 <2.0
ND ND
ND ND
TR0807E Page 29 of 29 May 2021
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7

TR0807E May 2021
FIGURES

DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
")
")
")
Willis Creek
Old Outfall 002Cape Fear RiverOutfall 002
W.O. Huske Dam
Site River Water Intake
NC Highway 87Seep A
Seep B
Seep C
Seep D
GBCTributary1GeorgiaBranchCreek
Site Location Map
Figure
1Raleigh
2,000 0 2,0001,000 Feet
³
May 2020
Legend
")Site Features
Site Boundary
Nearby Tributary
Observed Seep (Natural Drainage)
Site Drainage Network
Notes:1. The outline of Cape Fear River is approximate and is based on open data from ArcGIS Online and North Carolina Department ofEnvironmental Quality Online GIS (MajorHydro shapefile).2. Basemap sources: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GISUser Community
Chemours Fayetteville Works, North Carolina
Areas at Site
Chemours Monomers IXM
Former DuPont PMDF Area
Wastewater Treatment Plant
Kuraray SentryGlas®Leased Area
Kuraray Trosifol®Leased Area
DuPont Polyvinyl FluorideLeased Area
Chemours PolymerProcessing Aid Area Power - Filtered andDemineralized WaterProduction
Kuraray Laboratory
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
Construction
Area
Kuraray SentryGlas®
Manufacturing
Operations
Kuraray Trosifol®
Manufacturing
Operations
Wastewater
Treatment
Plant
ChemoursMonomersIXM Area
Power - Filtered
and Demineralized
Water Production
KurarayLaboratory
DuPont Polyvinyl
Fluoride
Leased Area
Former
DuPont
PMDF Area
ChemoursPPA Area
Process and Sanitary Sewer Network
Chemours Fayetteville Works, North Carolina
Figure
2Raleigh
500 0 500250 Feet
³
May 2021
Projection: NAD 1983 StatePlane North Carolina FIPS 3200 Feet; Units in Foot US
Notes:
1. Piping layout is for illustrative purposes only and may not reflect exactpipe locations2. Aerial imagery provided by Esri basemaps (2020).
Legend
Abandoned/Decommissioned Chemical Sewer
Process Sewer
Sanitary Sewer
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
")
")
")")
")
")""""
")
")
")
")
!(
!(!(
!(
!(!(
24D-3-NOM
19B
23C-2
6A 6B 1
8*
18*
22*
23A
23C-1
23A-2
23A-3-ACID
23A-3-NOM
18A
18B
18A-1A
18A-1B 18A-2 18A-3A
18A-3B
18A-3C
AS-1
22-3
19A
22-1
Kuraray SentryGlas®
Manufacturing
Operations
Chemours
PPA Area
Kuraray
Laboratory
Kuraray Trosifol®
Manufacturing
Operations
WastewaterTreatment
Plant
Power - Filtered
and Demineralized
Water Production ChemoursMonomers
IXM Area
Former
DuPontPMDF Area
DuPont Polyvinyl
Fluoride
Leased Area
ConstructionArea
35-1
40
5
13
MH-1
MH-2 LS-1
MH-4
LS-3
LS-2
Process and Sanitary Sewer Network Sampling Locations
Chemours Fayetteville Works, North Carolina
Figure
3Raleigh
500 0 500250 Feet
³
May 2021
Projection: NAD 1983 StatePlane North Carolina FIPS 3200 Feet; Units in Foot US
Notes:
* - Existing flow meter locations.1. Aerial imagery provided by Esri basemaps (2020).
Legend
!(Temporal Composite Sampling Location
")Grab Sampling Location
Abandoned/Decommissioned Chemical Sewer
Process Sewer
Sanitary Sewer
Sample Location Category
Intake
Non-process wastewater
Process wastewater
Activated sludge
Non-Contact Cooling Water (NCCW)
Stormwater
"
""
"
"
!
!
!
!!
!!
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A@A
INV. 137.75
INV. 142.92
INV. 140.15
INV. 141.19
INV. 141.47
INV. 138.99
INV. 139.67 INV. 140.87
INV. 142.07
INV. 139.10
INV. 140.10
INV. 141.18
INV. 142.50
INV. 144.17
INV. 143.19
INV. 142.08
INV. 141.72
INV. 141.36
INV. 140.72
INV. 140.02
INV. 137.92
INV. 136.96
INV. 137.92
WWTP INFLUENT SUMPINV. 134.43
C
a
p
e
F
e
a
r
Ri
v
e
r
FTA-01136.06
MW-17D120.18
MW-1S131.90
MW-22D114.91
MW-24130.75
NAF-01143.18
NAF-02150.31
NAF-12141.83
PW-13120.00
PZ-11143.85
PZ-17121.86
SMW-05125.21
SMW-07128.67
SMW-08117.54
SMW-08B109.47
Sanitary Sewer Networkand Groundwater Elevations
Chemours Fayetteville Works, North Carolina
Figure
4Raleigh
³
May 2021
Projection: NAD 1983 StatePlane North Carolina FIPS 3200 Feet; Units in Foot US
500 0 500250 Feet
Notes:ft NAVD88 - feet North American Vertical Datum 1988.1. Process piping elevations may be +/- 1 ft to the values presented.2. Maximum groundwater elevations presented are the highest levels recorded at the site from Dec. 2017 to Mar. 2021.3. The outline of Cape Fear River is approximate and is based on open data from ArcGIS Online and North Carolina Department of Environmental Quality Online GIS (MajorHydro shapefile).4. Basemap source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community.
Sanitary Piping
Pipe ElevationPotentially Higher ThanGroundwater
Pipe ElevationPotentially Lower ThanGroundwater
Pipe Elevation NotAssessed
Site Boundary
Site Areas
Chemours Monomer IXMArea
Kuraray Trosifol®ManufacturingOperations
Kuraray Laboratory
Kuraray SentryGlas®ManufacturingOperations
Power - Filtered andDemineralized WaterProduction
Wastewater TreatmentPlant
Legend
@A Monitoring Well NAF-02150.31 Well IDMaximum Groundwater Elevation2
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A@A
INV. 139.75
INV. 139.08
INV. 140.23
INV. 141.80 INV. 139.00
INV. 139.75
INV. 140.50
INV. 141.60
INV. 143.70
INV. 143.35
INV. 142.01
INV. 143.06
INV. 143.47
INV. 143.90
INV. 144.90
INV. 146.45
INV. 140.08 INV. 137.26
INV. 137.15
INV. 136.85
INV. 136.41
INV. 140.02
INV. 138.50
INV. 135.59
INV. 143.00
INV. 142.50
WWTP INFLUENT SUMPINV. 134.43
C
a
p
e
F
e
a
r
Ri
v
e
r
FTA-01136.06
MW-17D
120.18
MW-1S131.90
MW-22D114.91
MW-24130.75
NAF-01143.18
NAF-02150.31
NAF-12141.83
PW-13120.00
PZ-11
143.85
PZ-17121.86
SMW-05125.21
SMW-07128.67
SMW-08117.54
SMW-08B109.47
Historical Process Sewer Networkand Groundwater Elevations
Chemours Fayetteville Works, North Carolina
Figure
5Raleigh
³
May 2021
Projection: NAD 1983 StatePlane North Carolina FIPS 3200 Feet; Units in Foot US
500 0 500250 Feet
Notes:ft NAVD88 - feet North American Vertical Datum 1988.1. Process piping elevations may be +/- 1 ft to the values presented.2. Maximum groundwater elevations presented are the highest levels recorded at the site from Dec. 2017 to Mar. 2021.3. The outline of Cape Fear River is approximate and is based on open data from ArcGIS Online and North Carolina Department of Environmental Quality Online GIS (MajorHydro shapefile).4. Basemap source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community.
Process Piping
Pipe ElevationPotentially Higher ThanGroundwater
Pipe ElevationPotentially Lower ThanGroundwater
Pipe Elevation NotAssessed
Site Boundary
Site Areas
Chemours Monomer IXMArea
Kuraray Trosifol®ManufacturingOperations
Kuraray Laboratory
Kuraray SentryGlas®Manufacturing
Operations
Power - Filtered andDemineralized WaterProduction
Wastewater TreatmentPlant
Legend
@A Monitoring Well NAF-02150.31 Well IDMaximum Groundwater Elevation2
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7

TR0807E May 2021

Appendix A
Laboratory Analytical Data Review Narrative
(Full laboratory reports to be uploaded to OneDrive and data
transferred to NCDEQ EQuIS database)

DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7

ADQM Data Review
Site: Chemours Fayetteville
Project: WWTP Sampling
Project Reviewer: Michael Aucoin

DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7

Sample Summary
* FS=Field Sample DUP=Field Duplicate FB=Field Blank EB=Equipment Blank TB=Trip Blank

Field Sample ID Lab Sample ID Sample Matrix Filtered Sample Date Sample Time Sample Purpose
WWTP-FBLK-030421 0321-782-001-1 Blank Water N 03/04/2021 09:40 FB
WWTP-EQBLK-IS-030521 0321-782-002-1 Blank Water N 03/05/2021 10:00 EB
WWTP-LS-1-24-030521 0321-782-003-1 Other liquid N 03/05/2021 07:00 FS
WWTP-LS-2-24-030521 0321-782-006-1 Other liquid N 03/05/2021 07:00 FS
WWTP-MH-1-24-030521 0321-782-007-1 Other liquid N 03/05/2021 07:00 FS
WWTP-MH-2-24-030521 0321-782-008-1 Other liquid N 03/05/2021 07:00 FS
WWTP-MH-3-030521 0321-782-009-1 OTHER LIQUID N 03/05/2021 11:10 FS
WWTP-MH-24-4-030521 0321-782-010-1 Other liquid N 03/05/2021 07:00 FS
WWTP-18A-1B-030621 0321-782-011-1 OTHER LIQUID N 03/06/2021 06:31 FS
WWTP-18B-24-030521 0321-782-012-1 Other liquid N 03/05/2021 07:00 FS
WWTP-LS-1-24-031221-D 0321-782-013-1 Other liquid N 03/12/2021 07:00 DUP
WWTP-LS-1-24-031221 0321-782-014-1 Other liquid N 03/12/2021 07:00 FS
WWTP-18B-5-031121 0321-782-015-1 OTHER LIQUID N 03/11/2021 12:00 FS
WWTP-MH-3-17-031221 0321-782-016-1 OTHER LIQUID N 03/12/2021 00:00 FS
WWTP-LS-2-24-031221 0321-782-017-1 Other liquid N 03/12/2021 07:00 FS
WWTP-MH-1-5-031121 0321-782-018-1 OTHER LIQUID N 03/11/2021 12:00 FS
WWTP-MH-4-24-031221 0321-782-019-1 Other liquid N 03/12/2021 07:00 FS
WWTP-MH-2-24-031221 0321-782-020-1 Other liquid N 03/12/2021 07:00 FS
WWTP-18A-1A-031121 0321-782-021-1 OTHER LIQUID N 03/11/2021 15:30 FS
WWTP-18A-1B-031121 0321-782-022-1 OTHER LIQUID N 03/11/2021 15:30 FS
WWTP-LS-3-PVF-031121 0321-782-023-1 OTHER LIQUID N 03/11/2021 10:25 FS
WWTP-18B-24-031021 0321-782-024-1 Other liquid N 03/10/2021 07:00 FS
WWTP-18B-24-031021-D 0321-782-027-1 Other liquid N 03/10/2021 07:00 DUP
WWTP-FBLK-031021 0321-782-028-1 BLANK WATER N 03/10/2021 12:00 FB
WWTP-EQBLK-IS-031021 0321-782-029-1 BLANK WATER N 03/10/2021 12:05 EB
WWTP-MH-1-24-031021 0321-782-030-1 Other liquid N 03/10/2021 07:00 FS
WWTP-MH-2-24-031021 0321-782-031-1 Other liquid N 03/10/2021 07:00 FS
WWTP-MH-3-24-031021 0321-782-032-1 Other liquid N 03/10/2021 07:00 FS
WWTP-MH-4-24-031021 0321-782-033-1 Other liquid N 03/10/2021 07:00 FS
WWTP-LS-1-24-031021 0321-782-034-1 Other liquid N 03/10/2021 07:00 FS
WWTP-LS-2-24-031021 0321-782-035-1 Other liquid N 03/10/2021 07:00 FS
WWTP-18A-1B-030921 0321-782-036-1 OTHER LIQUID N 03/09/2021 15:30 FS
WWTP-LS-3-PVF-031621 0321-782-037-1 OTHER LIQUID N 03/16/2021 11:40 FS
WWTP-FBLK-031121 0321-782-038-1 BLANK WATER N 03/11/2021 11:40 FB
WWTP-EQBLK-PP-031121 0321-782-039-1 BLANK WATER N 03/11/2021 10:30 EB
WWTP-EQBLK-IS-031121 0321-782-040-1 BLANK WATER N 03/11/2021 11:40 EB
WWTP-18A-1A-031021 0321-782-041-1 OTHER LIQUID N 03/10/2021 11:00 FS
WWTP-LS-3-PVF-031821 0321-782-042-1 OTHER LIQUID N 03/18/2021 09:45 FS
WWTP-MH-2-24-030521-D 0321-782-043-1 Other liquid N 03/05/2021 07:00 DUP
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7

Analytical Protocol Laboratory Method Parameters
Enthalpy, Wilmington, NC PFAS by Isotope Dilution PFAS – Table 3+ (20 Compounds)

DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7

ADQM Data Review Checklist

Item Description Yes No* DVM Narrative Report
Laboratory Report
Exception Report (ER) #
A
Did samples meet laboratory acceptability requirements upon receipt (i.e., intact, within temperature, properly preserved, and no headspace where applicable)? X
B Were samples received by the laboratory in agreement with the associated chain of custody? X
C Was the chain of custody properly completed by the laboratory and/or field team? X
D Were samples prepped/analyzed by the laboratory within method holding times? X
E
Were QA/QC criteria met by the laboratory (method blanks, LCSs/LCSDs, MSs/MSDs, PDSs, SDs, duplicates/replicates, surrogates, total/dissolved differences/RPDs, sample results within calibration range)?
X
F Were field/equipment/trip blanks (if collected) detected at levels not requiring sample data qualification? X
G Were all data usable and not R qualified? X
ER# Description: Some results are qualified J as estimated since the concentration is between the method
detection limit and practical quantitation limit. See the DVM narrative report.

Other QA/QC Items to Note:
* See DVM Narrative Report, Lab Report, or ER # for further details as indicated.
The electronic data submitted for this project was reviewed via the Data Verification Module (DVM) process. Overall, the data is acceptable for use without qualification, except as noted on the attached DVM Narrative Report. The lab reports due to a large page count are stored on a network shared drive and are available to be posted on external shared drives, or on a flash drive.

DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7

Data Verification Module (DVM)
The DVM is an internal review process used by the ADQM group to assist with the determination of data usability. The electronic data deliverables received from the laboratory are loaded into the Locus EIM™ database and processed through a series of data quality checks, which are a combination of software
(Locus EIM™ database Data Verification Module (DVM)) and manual reviewer evaluations. The data is evaluated against the following data usability checks:
• Field and laboratory blank contamination
• US EPA hold time criteria
• Missing Quality Control (QC) samples
• Matrix spike (MS)/matrix spike duplicate (MSD) recoveries and the relative percent differences (RPDs) between these spikes
• Laboratory control sample (LCS)/laboratory control sample duplicate (LCSD) recoveries and the RPD between these spikes
• Surrogate spike recoveries for organic analyses
• Difference/RPD between field duplicate sample pairs
• RPD between laboratory replicates for inorganic analyses
• Difference/percent difference between total and dissolved sample pairs There are two qualifier fields in EIM: Lab Qualifier is the qualifier assigned by the lab and may not reflect the usability of the data. This qualifier may have many different meanings and can vary between labs and over time within the same lab. Please refer to the laboratory report for a description of the lab qualifiers. As they are lab descriptors they are not to be used when evaluating the data. Validation Qualifier is the 3rd party formal validation qualifier if this was performed. Otherwise this field contains the qualifier resulting from the ADQM DVM review process. This qualifier assesses the usability of the data and may not equal the lab qualifier. The DVM applies the following data evaluation qualifiers to analysis results, as warranted:
Qualifier Definition
B Not detected substantially above the level reported in the laboratory or field blanks. R Unusable result. Analyte may or may not be present in the sample. J Analyte present. Reported value may not be accurate or precise. UJ Not detected. Reporting limit may not be accurate or precise. The Validation Status Code field is set to “DVM” if the ADQM DVM process has been performed. If the DVM has not been run, the field will be blank. If the DVM has been run (Validation Status Code equals “DVM”), use the Validation Qualifier. If the data has been validated by a third party, the field “Validated By” will be set to the validator (e.g., ESI for Environmental Standards, Inc.).
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
DVM Narrative ReportThe result is estimated since the concentration is between the method detection limit and practical quantitation limit.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:WWTP SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsWWTP-MH-1-5-03112103/11/20210321-782-018-1R-PSDA0.123UG/L0.025PFAS 20 MethodB.EXPJNPW0.139MDLWWTP-MH-1-5-03112103/11/20210321-782-018-1PEPA0.0301UG/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-MH-1-5-03112103/11/20210321-782-018-1PFMOAA0.0492ug/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-MH-2-24-03052103/05/20210321-782-008-1R-EVE0.0386UG/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-MH-2-24-03052103/05/20210321-782-008-1PEPA0.0297UG/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-MH-2-24-03052103/05/20210321-782-008-1PFO2HxA0.028ug/L0.025PFAS 20 MethodB.EXPJNPW0.05MDLWWTP-MH-2-24-03052103/05/20210321-782-008-1PFMOAA0.0437ug/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-MH-2-24-030521-D03/05/20210321-782-043-1PFMOAA0.0274ug/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-MH-2-24-03102103/10/20210321-782-031-1Hfpo Dimer Acid0.0394UG/L0.025PFAS 20 MethodB.EXPJNPW0.05MDLWWTP-MH-2-24-03102103/10/20210321-782-031-1Hydrolyzed PSDA0.0463UG/L0.025PFAS 20 MethodB.EXPJNPW0.05MDLWWTP-MH-2-24-03102103/10/20210321-782-031-1PFMOAA0.0315ug/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-MH-2-24-03122103/12/20210321-782-020-1PS Acid0.0403UG/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-MH-2-24-03122103/12/20210321-782-020-1PFMOAA0.0342ug/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-MH-24-4-03052103/05/20210321-782-010-1PES0.0433UG/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-MH-24-4-03052103/05/20210321-782-010-1R-PSDCA0.0356UG/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-MH-3-03052103/05/20210321-782-009-1PEPA0.032UG/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-MH-3-03052103/05/20210321-782-009-1PFO3OA0.0319ug/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-MH-3-17-03122103/12/20210321-782-016-1PFO4DA0.0931ug/L0.075PFAS 20 MethodA.EXPJNPW0.1MDLWWTP-MH-3-17-03122103/12/20210321-782-016-1Hydro-EVE Acid0.0351UG/L0.025PFAS 20 MethodB.EXPJNPW0.05MDLWWTP-MH-3-24-03102103/10/20210321-782-032-1R-EVE0.0454UG/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-MH-3-24-03102103/10/20210321-782-032-1PEPA0.0347UG/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-MH-3-24-03102103/10/20210321-782-032-1PFO3OA0.0394ug/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLPage 1 of 3DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
The result is estimated since the concentration is between the method detection limit and practical quantitation limit.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:WWTP SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsWWTP-MH-4-24-03102103/10/20210321-782-033-1R-PSDCA0.0347UG/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-MH-4-24-03102103/10/20210321-782-033-1PFO4DA0.0958ug/L0.075PFAS 20 MethodA.EXPJNPW0.1MDLWWTP-MH-4-24-03122103/12/20210321-782-019-1R-PSDCA0.0339UG/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-18A-1A-03112103/11/20210321-782-021-1R-EVE0.0466UG/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-18A-1B-03062103/06/20210321-782-011-1PMPA0.0312UG/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-18A-1B-03062103/06/20210321-782-011-1Hydrolyzed PSDA0.0314UG/L0.025PFAS 20 MethodB.EXPJNPW0.05MDLWWTP-18A-1B-03092103/09/20210321-782-036-1PMPA0.0295UG/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-18A-1B-03112103/11/20210321-782-022-1Hfpo Dimer Acid0.0274UG/L0.025PFAS 20 MethodB.EXPJNPW0.05MDLWWTP-18A-1B-03112103/11/20210321-782-022-1PFO2HxA0.0402ug/L0.025PFAS 20 MethodB.EXPJNPW0.05MDLWWTP-18B-24-03052103/05/20210321-782-012-1PEPA0.0434UG/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-18B-24-03102103/10/20210321-782-024-1Hfpo Dimer Acid0.034UG/L0.025PFAS 20 MethodB.EXPJNPW0.05MDLWWTP-18B-24-03102103/10/20210321-782-024-1Hydrolyzed PSDA0.0257UG/L0.025PFAS 20 MethodB.EXPJNPW0.05MDLWWTP-18B-24-03102103/10/20210321-782-024-1PFO2HxA0.0259ug/L0.025PFAS 20 MethodB.EXPJNPW0.05MDLWWTP-18B-24-031021-D03/10/20210321-782-027-1Hydrolyzed PSDA0.029UG/L0.025PFAS 20 MethodB.EXPJNPW0.05MDLWWTP-18B-24-031021-D03/10/20210321-782-027-1PFO2HxA0.0263ug/L0.025PFAS 20 MethodB.EXPJNPW0.05MDLWWTP-18B-5-03112103/11/20210321-782-015-1PEPA0.0398UG/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-LS-1-24-03052103/05/20210321-782-003-1NVHOS, Acid Form0.0324UG/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-LS-1-24-03102103/10/20210321-782-034-1Hydro-EVE Acid0.0367UG/L0.025PFAS 20 MethodB.EXPJNPW0.05MDLWWTP-LS-1-24-03102103/10/20210321-782-034-1NVHOS, Acid Form0.0421UG/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-LS-1-24-03122103/12/20210321-782-014-1EVE Acid0.0296UG/L0.025PFAS 20 MethodB.EXPJNPW0.05MDLWWTP-LS-1-24-03122103/12/20210321-782-014-1NVHOS, Acid Form0.0298UG/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-LS-1-24-031221-D03/12/20210321-782-013-1EVE Acid0.0267UG/L0.025PFAS 20 MethodB.EXPJNPW0.05MDLWWTP-LS-1-24-031221-D03/12/20210321-782-013-1Hydro-PS Acid0.0473ug/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLPage 2 of 3DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
The result is estimated since the concentration is between the method detection limit and practical quantitation limit.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:WWTP SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsWWTP-LS-2-24-03052103/05/20210321-782-006-1Hydrolyzed PSDA0.0423UG/L0.025PFAS 20 MethodB.EXPJNPW0.05MDLWWTP-LS-2-24-03052103/05/20210321-782-006-1R-EVE0.0273UG/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-LS-2-24-03102103/10/20210321-782-035-1PFO2HxA0.0469ug/L0.025PFAS 20 MethodB.EXPJNPW0.05MDLWWTP-LS-2-24-03102103/10/20210321-782-035-1PFMOAA0.032ug/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-LS-2-24-03122103/12/20210321-782-017-1Hydrolyzed PSDA0.0395UG/L0.025PFAS 20 MethodB.EXPJNPW0.05MDLWWTP-LS-2-24-03122103/12/20210321-782-017-1R-EVE0.0391UG/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLWWTP-LS-2-24-03122103/12/20210321-782-017-1PFO2HxA0.0421ug/L0.025PFAS 20 MethodB.EXPJNPW0.05MDLWWTP-MH-1-24-03052103/05/20210321-782-007-1PFO2HxA0.0302ug/L0.025PFAS 20 MethodB.EXPJNPW0.05MDLWWTP-MH-1-24-03102103/10/20210321-782-030-1PFMOAA0.0439ug/L0.025PFAS 20 MethodA.EXPJNPW0.05MDLPage 3 of 3DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7

ADQM Data Review
Site: Chemours Fayetteville
Project: Stormwater Sampling 5/21 (select lot)
Project Reviewer: Michael Aucoin

DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7

Sample Summary
* FS=Field Sample DUP=Field Duplicate FB=Field Blank EB=Equipment Blank TB=Trip Blank

Field Sample ID Lab Sample ID Sample Matrix Filtered Sample Date Sample Time Sample Purpose
STW-LOC-23C-1-050421 320-73327-5 Surface Water N 05/04/2021 14:10 FS
STW-LOC-23C-1-050421-D 320-73327-6 Surface Water N 05/04/2021 14:10 DUP
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7

Analytical Protocol Laboratory Method Parameters
TAL – Sacramento Cl. Spec. Table 3 Compound SOP 21 compounds incl HFPO-DA

DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7

ADQM Data Review Checklist

Item Description Yes No* DVM Narrative Report
Laboratory Report
Exception Report (ER) #
A
Did samples meet laboratory acceptability requirements upon receipt (i.e., intact, within temperature, properly preserved, and no headspace where applicable)? X
B Were samples received by the laboratory in agreement with the associated chain of custody? X
C Was the chain of custody properly completed by the laboratory and/or field team? X
D Were samples prepped/analyzed by the laboratory within method holding times? X
E
Were QA/QC criteria met by the laboratory (method blanks, LCSs/LCSDs, MSs/MSDs, PDSs, SDs, duplicates/replicates, surrogates, total/dissolved differences/RPDs, sample results within calibration range)?
X
F Were field/equipment/trip blanks (if collected) detected at levels not requiring sample data qualification? X
G Were all data usable and not R qualified? X
ER# Description: Some results are qualified J as estimated since the concentration is between the method
detection limit and practical quantitation limit. See the DVM narrative report.

Other QA/QC Items to Note:
* See DVM Narrative Report, Lab Report, or ER # for further details as indicated.
The electronic data submitted for this project was reviewed via the Data Verification Module (DVM) process. Overall, the data is acceptable for use without qualification. The lab reports due to a large page count are stored on a network shared drive and are available to be posted on external shared drives, or on a flash drive.

DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7

Data Verification Module (DVM)
The DVM is an internal review process used by the ADQM group to assist with the determination of data usability. The electronic data deliverables received from the laboratory are loaded into the Locus EIM™ database and processed through a series of data quality checks, which are a combination of software
(Locus EIM™ database Data Verification Module (DVM)) and manual reviewer evaluations. The data is evaluated against the following data usability checks:
• Field and laboratory blank contamination
• US EPA hold time criteria
• Missing Quality Control (QC) samples
• Matrix spike (MS)/matrix spike duplicate (MSD) recoveries and the relative percent differences (RPDs) between these spikes
• Laboratory control sample (LCS)/laboratory control sample duplicate (LCSD) recoveries and the RPD between these spikes
• Surrogate spike recoveries for organic analyses
• Difference/RPD between field duplicate sample pairs
• RPD between laboratory replicates for inorganic analyses
• Difference/percent difference between total and dissolved sample pairs There are two qualifier fields in EIM: Lab Qualifier is the qualifier assigned by the lab and may not reflect the usability of the data. This qualifier may have many different meanings and can vary between labs and over time within the same lab. Please refer to the laboratory report for a description of the lab qualifiers. As they are lab descriptors they are not to be used when evaluating the data. Validation Qualifier is the 3rd party formal validation qualifier if this was performed. Otherwise this field contains the qualifier resulting from the ADQM DVM review process. This qualifier assesses the usability of the data and may not equal the lab qualifier. The DVM applies the following data evaluation qualifiers to analysis results, as warranted:
Qualifier Definition
B Not detected substantially above the level reported in the laboratory or field blanks. R Unusable result. Analyte may or may not be present in the sample. J Analyte present. Reported value may not be accurate or precise. UJ Not detected. Reporting limit may not be accurate or precise. The Validation Status Code field is set to “DVM” if the ADQM DVM process has been performed. If the DVM has not been run, the field will be blank. If the DVM has been run (Validation Status Code equals “DVM”), use the Validation Qualifier. If the data has been validated by a third party, the field “Validated By” will be set to the validator (e.g., ESI for Environmental Standards, Inc.).
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7

DVM Narrative Report Site: Fayetteville Sampling Program: Stormwater Sampling 5/21 (select lot) Validation Options: LABSTATS The electronic data submitted for this project was reviewed via the DVM process. The data is acceptable for use without qualification.

DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7

ADQM Data Review
Site: Chemours Fayetteville
Project: Stormwater Sampling 4/21 (select lot)
Project Reviewer: Michael Aucoin

DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7

Sample Summary
* FS=Field Sample DUP=Field Duplicate FB=Field Blank EB=Equipment Blank TB=Trip Blank

Field Sample ID Lab Sample ID Sample Matrix Filtered Sample Date Sample Time Sample Purpose
STW-LOC-23C-2-042621 320-72886-1 Surface Water N 04/26/2021 15:45 FS
STW-LOC-23C-2-042621-D 320-72886-2 Surface Water N 04/26/2021 15:45 DUP
STW-LOC-FB-042621 320-72886-3 Blank Water N 04/26/2021 16:00 FB
STW-LOC-TB-042621 320-72886-4 Blank Water N 04/26/2021 16:30 TB
STW-LOC-EB-042621 320-72886-5 Blank Water N 04/26/2021 16:35 EB
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7

Analytical Protocol Laboratory Method Parameters
TAL – Sacramento Cl. Spec. Table 3 Compound SOP 21 compounds incl HFPO-DA

DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7

ADQM Data Review Checklist

Item Description Yes No* DVM Narrative Report
Laboratory Report
Exception Report (ER) #
A
Did samples meet laboratory acceptability requirements upon receipt (i.e., intact, within temperature, properly preserved, and no headspace where applicable)? X
B Were samples received by the laboratory in agreement with the associated chain of custody? X
C Was the chain of custody properly completed by the laboratory and/or field team? X
D Were samples prepped/analyzed by the laboratory within method holding times? X
E
Were QA/QC criteria met by the laboratory (method blanks, LCSs/LCSDs, MSs/MSDs, PDSs, SDs, duplicates/replicates, surrogates, total/dissolved differences/RPDs, sample results within calibration range)?
X X
F Were field/equipment/trip blanks (if collected) detected at levels not requiring sample data qualification? X
G Were all data usable and not R qualified? X
ER# Description:

Other QA/QC Items to Note:

* See DVM Narrative Report, Lab Report, or ER # for further details as indicated.
The electronic data submitted for this project was reviewed via the Data Verification Module (DVM) process. Overall the data is acceptable for use without qualification, except as noted on the attached DVM Narrative Report. The lab reports due to a large page count are stored on a network shared drive and are available to be posted on external shared drives, or on a flash drive.

DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7

Data Verification Module (DVM)
The DVM is an internal review process used by the ADQM group to assist with the determination of data usability. The electronic data deliverables received from the laboratory are loaded into the Locus EIM™ database and processed through a series of data quality checks, which are a combination of software
(Locus EIM™ database Data Verification Module (DVM)) and manual reviewer evaluations. The data is evaluated against the following data usability checks:
• Field and laboratory blank contamination
• US EPA hold time criteria
• Missing Quality Control (QC) samples
• Matrix spike (MS)/matrix spike duplicate (MSD) recoveries and the relative percent differences (RPDs) between these spikes
• Laboratory control sample (LCS)/laboratory control sample duplicate (LCSD) recoveries and the RPD between these spikes
• Surrogate spike recoveries for organic analyses
• Difference/RPD between field duplicate sample pairs
• RPD between laboratory replicates for inorganic analyses
• Difference/percent difference between total and dissolved sample pairs There are two qualifier fields in EIM: Lab Qualifier is the qualifier assigned by the lab and may not reflect the usability of the data. This qualifier may have many different meanings and can vary between labs and over time within the same lab. Please refer to the laboratory report for a description of the lab qualifiers. As they are lab descriptors they are not to be used when evaluating the data. Validation Qualifier is the 3rd party formal validation qualifier if this was performed. Otherwise this field contains the qualifier resulting from the ADQM DVM review process. This qualifier assesses the usability of the data and may not equal the lab qualifier. The DVM applies the following data evaluation qualifiers to analysis results, as warranted:
Qualifier Definition
B Not detected substantially above the level reported in the laboratory or field blanks. R Unusable result. Analyte may or may not be present in the sample. J Analyte present. Reported value may not be accurate or precise. UJ Not detected. Reporting limit may not be accurate or precise. The Validation Status Code field is set to “DVM” if the ADQM DVM process has been performed. If the DVM has not been run, the field will be blank. If the DVM has been run (Validation Status Code equals “DVM”), use the Validation Qualifier. If the data has been validated by a third party, the field “Validated By” will be set to the validator (e.g., ESI for Environmental Standards, Inc.).
DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7
DVM Narrative ReportHigh relative percent difference (RPD) observed between field duplicate and parent sample. The reported result may be imprecise.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Stormwater Sampling 4/21AnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsSTW-LOC-23C-2-042621-D04/26/2021320-72886-2R-PSDA0.0086UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLPage 1 of 1DocuSign Envelope ID: 1271412A-6FC7-43BB-A0C1-19ACD0A5BDF7