2020.12.18_CCO.p11_CharacterizationofPFASFinalQuarterlyReport

CHARACTERIZATION OF PFAS IN
PROCESS AND NON-PROCESS
WASTEWATER AND STORMWATER
Initial Characterization - Final Quarterly Report

Prepared for
The Chemours Company FC, LLC
22828 NC-87
Fayetteville, NC 28306

Prepared by
Geosyntec Consultants of NC, P.C.
2501 Blue Ridge Road, Suite 430
Raleigh, NC 27607
Geosyntec Project Number TR0795A

December 18, 2020
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12/18/2020

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TABLE OF CONTENTS
1. INTRODUCTION ................................................................................................ 5
2. BACKGROUND .................................................................................................. 6
2.1 Paragraph 11(c) Reporting Background ...................................................... 6
2.2 Site and Conveyance Network Background ................................................ 7
2.2.1 Locations and Location Categories ................................................. 8
3. FINAL QUARTERLY REPORT OBJECTIVES .............................................. 10
4. PARAGRAPH 11(C) METHODS AND SCOPE .............................................. 10
4.1 Sample Locations ...................................................................................... 11
4.2 Field Methods ............................................................................................ 11
4.2.1 General Field Methods .................................................................. 11
4.2.2 Grab Sampling Methods ............................................................... 12
4.2.3 Temporal Composite Sampling Methods...................................... 12
4.2.4 Wet Event Sampling Methods ...................................................... 13
4.3 Laboratory Methods .................................................................................. 13
5. ASSESSMENT OF PARAGRAPH 11(C) INITIAL CHARACTERIZATION 14
5.1 Presentation of Results Table 3+ 17 Compounds ...................................... 14
5.2 Results Tables and Figures ........................................................................ 14
5.3 Statistical Assessment Technique .............................................................. 15
5.4 Conveyance Network PFAS Data Observations ....................................... 16
5.4.1 Intake River Water at Facility ....................................................... 17
5.4.2 Non-Chemours Process Wastewater ............................................. 17
5.4.3 Non-Contact Cooling Water ......................................................... 18
5.4.4 Stormwater .................................................................................... 18
5.4.5 Stormwater-NCCW ....................................................................... 19
5.4.6 Wastewater Treatment Plant ......................................................... 19
5.4.7 Combined Flows to Outfall 002 .................................................... 20
6. PARAGRAPH 11(D) SAMPLING PLAN UPDATES ...................................... 20
7. SUMMARY AND RECOMMENDATIONS .................................................... 22
8. REFERENCES ................................................................................................... 24

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LIST OF TABLES
Table 1: Paragraph 11(b) Sample Location Summary
Table 2: Summary of Samples Collected
Table 3: PFAS and Associated Analytical Methods
Table 4: Summary Statistics for HFPO-DA, PFMOAA, and PMPA
Table 5: Summary Statistics for Total Table 3+ (17 Compounds), Total Table 3+ (20
Compounds), and Total EPA Method 537
Table 6: Wilcoxon Rank Sum Test Results for Comparison to Location 1 (Intake River
Water at Facility)

LIST OF FIGURES
Figure 1: Site Location Map
Figure 2: Paragraph 11(b) Sample Locations
Figure 3A: HFPO-DA, PFMOAA, and PMPA Summary Statistics - Locations that
Reach Outfall 002 - All Events
Figure 3B: Total Table 3+ and Total EPA Method Mod 537 Summary Statistics -
Locations that Reach Outfall 002 - All Events
Figure 4A: Total Table 3+ Concentrations – Non-Chemours Process Wastewater
Figure 4B: Total Table 3+ Concentrations – Non-Contact Cooling Water
Figure 4C: Total Table 3+ Concentrations – Stormwater
Figure 4D: Total Table 3+ Concentrations – Stormwater-Non-Contact Cooling Water
Figure 4E: Total Table 3+ Concentrations – Wastewater Treatment Plant
Figure 4F: Total Table 3+ Concentrations – Combined Flows to Outfall 002
Figure 5A: Median Total Table 3+ Concentrations – All Locations
Figure 5B: Median Total EPA Method 537 Mod Concentrations – All Locations
Figure 6: Paragraph 11(d) Sample Locations

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LIST OF APPENDICES
Appendix A: 2020 Quarter 3 Paragraph 11(c) Methods and Results
Appendix B: Sitewide and Targeted Stormwater Sampling Summary
Appendix C: Analytical Results – All Sampling Events

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ACRONYMS AND ABBREVIATIONS
CO Consent Order
COC Chain of Custody
DEQ The North Carolina Department of Environmental Quality
DO Dissolved oxygen
DQO data quality objectives
DVM Data Verification Module
EIM Environmental Information Management
EPA Environmental Protection Agency
EPA 537M EPA Method 537 Mod
HDPE High Density Polyethylene
HFPO-DA Hexafluoropropylene oxide dimer acid
Hydrolyzed PSDA 2-fluoro-2-[1,1,2,3,3,3-hexafluoro-2-(1,1,2,2-tetrafluoro
sulfoethoxy)propoxy]-acetic acid
IXM ion exchange materials
MS matrix spike
MGD million gallons per day
MSD matrix spike duplicates
NCCW non-contact cooling water
ng/L nanograms per liter
PFAS per- and polyfluoroalkyl substances
PFMOAA 2,2-difluoro-2-(trifluoromethoxy) acetic acid
PMDF Polymer Manufacturing and Development Facility
PMPA perfluoromethoxypropyl carboxylic acid
PPA Polymer Processing Aid
QA/QC quality assurance/ quality control
R-EVE 4-(2-carboxy-1,1,2,2-tetrafluoroethoxy)-2,2,3,3,4,5,5,5-
octafluoro-pentanoic acid
R-PSDA 2,2,3,3,4,5,5,5-octafluoro-4-(1,1,2,2-tetrafluoro-2-
sulfoethoxy)-pentanoic acid
SOP Standard Operating Procedure
TestAmerica TestAmerica Sacramento
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 Paragraph 11(c) in the executed
Consent Order entered February 25, 2019 amongst Chemours, the North Carolina
Department of Environmental Quality (DEQ), and Cape Fear River Watch.
The objective of Paragraph 11(c) was to conduct an Initial Characterization of the
constituents and concentrations of per- and polyfluoroalkyl substances (“PFAS”) in the
raw water intake and in process wastewater, non-process wastewater, and stormwater at
the Chemours Fayetteville Works, North Carolina site (the Facility). Paragraph 11(c)
requires Chemours to submit a final quarterly report no later than 18 months after
approval of a sampling plan. This report represents the required final quarterly report.
The objectives of the final quarterly report are to summarize the findings of the Paragraph
11(c) sampling events collected during the 18-month Initial Characterization period, and
provide recommendations for transitioning to Paragraph 11(d), Ongoing Sampling.
Chemours and its two tenants, Kuraray and DuPont, currently operate five manufacturing
areas on the site along with two other areas servicing manufacturing activities. These
various areas both use and produce water which flows through the site conveyance
network to Outfall 002. The site conveyance network waters are comprised of three (3)
water types (process wastewater, non-process wastewater, and stormwater) and five (5)
primary flows that combine prior to discharge at Outfall 002. The flow pathways at the
Facility are listed below:
1. Cooling Water Channel, which transmits non-process wastewater, commonly
called non-contact cooling water (NCCW), and stormwater from the Chemours
Monomers Ion Exchange Materials (IXM) area;
2. Wood Lined Trench, which transmits NCCW from Kuraray areas and stormwater
from Kuraray and the Chemours Polymer Processing Aid (PPA) area;
3. Wastewater Treatment Plant (WWTP) Discharge, which transmits treated waters
from the WWTP;
4. DuPont Area Ditches, which transmit NCCW and stormwater from DuPont; and
5. Open Channel to Outfall 002, which combines the above conveyances and
transmits and discharges these flows through Outfall 002.
Chemours submitted, and NCDEQ approved in writing, a PFAS Characterization
Sampling Plan (the Sampling Plan) which identified sample locations and methods for
bimonthly sample collection during the Initial Characterization period to represent the
various water sources and flow types. The 31 sample locations were grouped into seven
location categories developed to facilitate analysis and interpretation of data collected
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during this program. The location categories were developed based on locations having
either (a) a common type of water (e.g., NCCW), or (b) a common spatial and flow path
relationship (e.g., WWTP related locations). The seven categories are listed and briefly
described below:
Location Category Description
Intake River Water at Facility Represents background PFAS concentrations
Non-Chemours Process Wastewater Locations representing process wastewater from
Kuraray and DuPont
Non-Contact Cooling Water Locations representing NCCW from Kuraray
and Chemours
Stormwater Locations containing only stormwater from
throughout the Facility
Stormwater-Non-Contact Cooling
Water
Locations representing commingled stormwater
and NCCW
Wastewater Treatment Plant Locations representing the WWTP influent and
effluent, and the Terracotta pipe, which prior to
November 2017 transmitted Chemours process
wastewater to the WWTP and will be
decommissioned in 2021
Combined Flows to Outfall 002 Locations representing stormwater, NCCW, and
process wastewater from the combined flow
pathways at the Facility in the Open Channel to
Outfall 002

Chemours collected samples in accordance with the Sampling Plan for nine (9) bimonthly
sampling events during the 18-month Initial Characterization period from April 2019 to
September 2020. Samples were analyzed for EPA Method 537 Mod (EPA 537M) and
Table 3+ Method PFAS. EPA 537M PFAS compounds are often associated with effluents
from municipal WWTPs and firefighting foams, amongst other sources. Table 3+ PFAS
compounds are often related to operations at the Facility. Summarized findings and
recommendations from the Initial Characterization are listed below:
Summary of Findings
The following conclusions can be drawn based on the samples collected during the Initial
Characterization period:
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• The intake river water at the facility (Location 1) contains PFAS before this water
is used at the Facility. PFAS detected at Location 1 represent the background level
of PFAS at other sampling locations.
• Across all locations, EPA 537M PFAS were not statistically different or higher
than intake data with the exception of one location (23A) on the Terracotta pipe
which is being decommissioned in 2021.
• Non-Chemours process wastewater locations (Locations 18, 19A, 19B, and 23B)
and NCCW only locations (Locations 6A, 6B, 24A, 24B, and 24C) generally have
low PFAS concentrations, similar to or less than those observed at the intake river
water at the Facility.
• The primary sources of total Table 3+ PFAS concentrations to Outfall 002 are (1)
locations comprising both stormwater and non-process wastewater from the
Monomers IXM area, (2) stormwater-only locations, and (3) the WWTP effluent,
including PFAS loadings from the Terracotta pipe which prior to November 2017
transmitted Chemours process water to the WWTP.
The degree of PFAS contributions from the sources outlined in the last bullet above are
expected to be reduced through on-going present and planned future actions, including:
• Continued use of the Thermal Oxidizer and other air emissions controls at Site
reduces aerial emissions of PFAS. This mitigates future PFAS loading to surfaces
and subsequent stormwater concentrations;
• Pursuant to the Consent Order Addendum, the in-progress separation of NCCW
and stormwater flows occurring in the Monomers IXM Area and the 2021 planned
treatment of stormwater flows in this area will reduce PFAS contributions from
the Monomers Area; and
• The planned 2021 decommissioning of the Terracotta pipe will reduce PFAS
contributions to the WWTP.
Summary of Recommendations
Based on these findings above, the following recommendations are made as the sampling
program transitions from the Initial Characterization period of Paragraph 11(c) to
Ongoing Sampling in Paragraph 11(d):
• Continue analyzing EPA 537M at the intake river water at Location 1 and
Location 20 only;
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• Upon completion of the Monomers IXM stormwater treatment system, replace
Locations 9, 10, 10A, 24A, 24B, and 24C with one new sample location
representing the combined NCCW;
• Replace locations representing inputs to the WWTP (Locations 6A, 6B, 18, 19A,
19B, 23A, 23B) with ongoing sampling of the WWTP influent (Location 22); and
• Replace stormwater-only Locations 2, 3, 4, and 5 with ongoing sampling of
downstream Location 7A.
Pursuant to Paragraph 11(d), over the next two years starting in January 2021, Chemours
will continue to collect bimonthly samples to characterize PFAS in the intake river water,
process wastewater, non-process wastewater, and stormwater at the Facility. Chemours
requests approval from DEQ to perform the ongoing sampling in accordance with these
recommendations by January 8, 2021. Results will be reported semi-annually, i.e. every-
other quarter, within 90 days of the previous semiannual period. The first report will be
submitted within 90 days of the end Quarter 2, 2021.

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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) as the final quarterly report for Initial
Characterization of the identification of constituents and concentrations of per- and
polyfluoroalkyl substances (“PFAS”) in process wastewater, non-process wastewater,
and stormwater at the Chemours Fayetteville Works, North Carolina site (the Facility,
Figure 1). This report was prepared pursuant to Paragraph 11(c) in the executed Consent
Order amongst Chemours, the North Carolina Department of Environmental Quality
(DEQ), and Cape Fear River Watch, entered into court on February 25, 2019.
This is the sixth and final quarterly report addressing Paragraph 11(c) of the Consent
Order. The objective of this report reflects the same stated objective in the PFAS
Characterization Sampling Plan (Geosyntec, 2019a): to characterize the concentrations
of PFAS in the raw water intake at the Facility, process wastewater, non-process
wastewater, and stormwater, including water that is discharged through Outfall 002.
This final quarterly report summarizes the findings across nine (9) Paragraph 11(c)
sampling events through the 18-month Initial Characterization period, and provides
recommendations for transitioning to Paragraph 11(d), Ongoing Sampling. The
remainder of this document is organized as follows:
• Section 2 – Background: this section describes the Facility, the conveyance
network which transmits flow to Outfall 002, locations sampled and location
categories, and Paragraph 11(c) quarterly reporting to date;
• Section 3 – Final Quarterly Report Objectives: this section describes the
objectives of this report;
• Section 4 – Paragraph 11(c) Methods: this section describes the methods
employed for sample collection and analysis over the 18-month Initial
Characterization period;
• Section 5 – Assessment of Paragraph 11(c) Initial Characterization: this
section describes PFAS concentrations trends and observations in investigative
samples over the 18-month Initial Characterization period;
• Section 6 – Proposed Paragraph 11(d) Sampling Plan Updates: this section
describes recommendations for transitioning to ongoing sampling activities
pursuant to Paragraph 11(d) of the executed Consent Order;
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• Section 7 – Summary and Recommendations: this section summarizes the
observations of results from the Initial Characterization period and recommended
changes to the sampling plan; and
• Section 8 – References: this section lists the documents referenced in the report.
2. BACKGROUND
This section provides a summary of past Paragraph 11(c) quarterly reports and a
background overview of how the Facility uses water, the types of water present at the
site, how this water flows to the Facility’s discharge point at Outfall 002 and how the
locations sampled as part of Paragraph 11(c) were grouped for interpretation.
2.1 Paragraph 11(c) Reporting Background
Chemours submitted the PFAS Characterization Sampling Plan (the Sampling Plan) to
DEQ on May 6, 2019 (Geosyntec, 2019a) and received written approval from DEQ on
June 19, 2019. Past quarterly reports for the bimonthly sampling program have
summarized the activities conducted during the previous quarter, reported observed
trends in context to previous bimonthly sampling events, and provided recommendations
to implement during the next quarter. A summary of the bimonthly sampling events and
supplemental investigations included in past quarterly reports are provided in the table
below.
Quarterly
Report
No.
Date
Submitted Activities Summarized Reference
1 July 31,
2019
April 2019 and June 2019 bimonthly
sampling events collected in 2019 Quarter 2
Geosyntec,
2019b
2 October
31, 2019
August 2019 bimonthly sampling event
collected in 2019 Quarter 3 and
supplemental investigations completed in
2019 Quarters 2 and 3
Geosyntec,
2019c
3 January
31, 2020
October 2019 and December 2019
bimonthly sampling events collected in 2019
Quarter 4
Geosyntec,
2020a
4 April 30,
2020
January 2020 bimonthly sampling event
collected in 2020 Quarter 1
Geosyntec,
2020b
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Quarterly
Report
No.
Date
Submitted Activities Summarized Reference
5 July 31,
2021
April 2020 and May/June 2020 bimonthly
sampling events collected in 2020 Quarter 2
Geosyntec,
2020c

The ninth and final bimonthly sampling event for the 18-month Initial Characterization
period was collected in 2020 Quarter 3 as a dry event on August 26, 2020 (the August
2020 event). Samples were collected as outlined in the PFAS Characterization Sampling
Plan (Geosyntec, 2019a), with adjustments made based on recommendations in prior
reports (Geosyntec 2019a, 2019b, 2019c, 2020a, 2020b, and 2020c). Results from the
investigative samples in the August 2020 event are included in Appendix A and presented
and discussed with the data from the entire program in this report.
2.2 Site and Conveyance Network Background
Chemours and its two tenants, Kuraray and DuPont, currently operate five manufacturing
areas on the site along with two other areas servicing manufacturing activities. These
areas are shown in Figure 1 and listed below:
• Chemours Monomers Ion Exchange Materials (IXM);
• Chemours Polymer Processing Aid (PPA) Area;
• Kuraray Trosifol® Leased Area;
• Kuraray SentryGlas® Leased Area;
• DuPont Polyvinylfluoride Leased Area;
• Wastewater treatment plant (WWTP); and
• Power Area at the Facility (produces filtered water and demineralized water).
These various areas both use and produce water which flows through the site conveyance
network to Outfall 002. As an example of flows through Outfall 002, during normal
operations between January and November 2020, the operations from Chemours and its
tenants, DuPont and Kuraray, resulted in Facility discharges at Outfall 002 of primarily
NCCW at flow rates between 7.2 to 36.5 million gallons per day (MGD) with a median
flow of 21.9 MGD. The site conveyance network waters are comprised of three (3) water
types and five (5) primary flows as they combine at Outfall 002. Thirty-one (31) sample
locations representing the various water types and flow pathways were grouped into
seven (7) categories described in the following sub-section to facilitate the analyses of
data collected during this program. The water types and flow pathways at the Facility are
listed below:
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Water Types
1. Process wastewater. Note, Chemours process wastewaters are presently disposed
of offsite while tenant (Kuraray and DuPont) process wastewaters are treated at
the onsite WWTP prior to discharge;
2. Non-Process Wastewater. Note, Non-Process Wastewater is also commonly
called non-contact cooling water (NCCW); and
3. Stormwater.
Flow Pathways
1. Cooling Water Channel, which transmits NCCW and stormwater from the
Chemours Monomers IXM area;
2. Wood Lined Trench, which transmits NCCW from Kuraray areas and stormwater
from Kuraray and the Chemours PPA area;
3. Wastewater Treatment Plant Discharge, which transmits treated waters from the
WWTP;
4. DuPont Area Ditches, which transmit NCCW and stormwater from DuPont; and
5. Open Channel to Outfall 002, which combines the above flows and transmits and
discharges them through Outfall 002.
2.2.1 Locations and Location Categories
The 31 locations were grouped into seven location categories developed to facilitate
analysis and interpretation of data collected during this program. The location categories
were developed based on locations having either (a) a common type of water (e.g.,
NCCW), or (b) a common spatial and flow path relationship (e.g., WWTP related
locations). The seven categories are listed below and then described:
• Intake River Water at Facility
• Non-Chemours Process Wastewater
• Non-Contact Cooling Water
• Stormwater
• Stormwater-Non-Contact Cooling Water
• Wastewater Treatment Plant
• Combined Flows to Outfall 002
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Intake River Water at Facility
The majority (~98%) of water discharged at Outfall 002 originates from water drawn
from the Cape Fear River. Samples were collected at the intake river water at the Facility
(Location 1, Figure 2) to represent the background concentration of PFAS in water
entering the conveyance network.
Non-Chemours Process Wastewater
Process wastewater from non-Chemours manufacturing areas (Kuraray and DuPont
leased areas) are piped to the WWTP for treatment and ultimately discharge via the
WWTP to Outfall 002. Non-Chemours Process Wastewater locations include: Kuraray
process wastewater (Location 18), DuPont Plant 1 process wastewater (Location 19A),
DuPont Plant 2 process wastewater (Location 19B), and Kuraray Laboratory process
wastewater (Location 23B) as shown on Figure 2.
Non-Contact Cooling Water
Non-contact cooling water (i.e. NCCW) is non-process wastewater used to cool
equipment in manufacturing areas. This water does not directly contact manufactured
products. NCCW is derived from the intake river water. The NCCW locations include
Kuraray Area non-process wastewater (Locations 6A and 6B) and Monomers IXM non-
process wastewater (Locations 24A, 24B, and 24C) as shown on Figure 2. The Kuraray
and Monomers IXM non-process wastewater sources of flow discharge to Outfall 002 via
the WWTP and the Cooling Water Channel, respectively.
Stormwater
Stormwater is a source of flow to Outfall 002 throughout the Site during and shortly after
precipitation events. The stormwater-only locations include Kuraray northern area
(Location 2), the PPA area (Location 3), the combined Kuraray northern area and PPA
areas (Location 4), the Kuraray southern area (Location 5), the Monomers IXM area
(Location 10), and the former DuPont Polymer Manufacturing and Development Facility
(PMDF) area (Location 11) as shown on Figure 2. Additional site-wide and targeted
stormwater sampling was conducted to support the investigations related to Paragraph 12
of the executed Consent Order. Results of this sampling are described in Appendix B.
Stormwater-Non-Contact Cooling Water
Stormwater and NCCW are commingled in some of the flow pathways at the site as
described earlier. The locations comprising Stormwater-NCCW include locations from
the western portion of the Facility (Location 7A), non-process wastewater and stormwater
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from Monomers IXM (Locations 9 and 10A), DuPont area non-process wastewater and
stormwater (Locations 12, 13, and 14), non-process wastewater and stormwater from the
eastern portion of the Facility (Location 15), and the southern sediment basin (Location
21A) as shown on Figure 2.
Wastewater Treatment Plant
Effluent from the WWTP is a source of flow to Outfall 002. The WWTP receives process
wastewater from Kuraray and DuPont, non-process wastewater from throughout the
Facility, and some stormwater flows. Wastewater Treatment Plant category locations
include the WWTP effluent (Location 8), the WWTP combined influent (Location 22),
and the Terracotta pipe (Location 23A) as shown on Figure 2.
Combined Flows to Outfall 002
Stormwater, NCCW, and process wastewater from all flow pathways at the Facility
combine in the Open Channel to Outfall 002. Locations include the Open Channel to
Outfall 002 downstream of the WWTP (Location 7B), the Open Channel to Outfall 002
downstream of DuPont area (Location 7C), and Outfall 002 (Location 20) as shown on
Figure 2.
3. FINAL QUARTERLY REPORT OBJECTIVES
This final quarterly report summarizes the data from the nine bimonthly sampling events
that have been collected to characterize PFAS in non-process wastewater, process
wastewater, and stormwater at the Facility, pursuant to Paragraph 11(c) of the executed
Consent Order. Objectives of the final quarterly report are to:
1) identify trends and observations at each location / location category using time
trend plots,
2) evaluate if each location contains PFAS concentrations in addition to the
background concentrations observed at the intake river water at the Facility
(Location 1) using statistical methods, and
3) make recommendations for the Ongoing Sampling program pursuant to Paragraph
11(d) based on the Initial Characterization program findings.
4. PARAGRAPH 11(C) METHODS AND SCOPE
This section describes the methods implemented for the 18-month Initial Characterization
period including locations sampled, field methods implemented, and laboratory methods
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used. Further details on these locations and methods are provided in the prior quarterly
reports.
4.1 Sample Locations
Locations sampled are described in Table 1 and shown in Figure 2. The number of
samples collected during the 18-month period during each bimonthly sampling event
varied from nineteen (19) in the October 2019 sampling event to thirty (30) in the
May/June 2020 event. Table 2 provides a summary of the sample locations collected
during each event. Adjustments to some sample locations were made based on
recommendations stated in prior reports. A summary of these changes is listed below:
• Chemours process wastewater Locations 16, 17A, and 17B were not sampled after
2019 Quarter 2 as water from these locations are presently disposed of offsite and
do not reach Outfall 002 (Geosyntec, 2019c).
• Location 7C was added to the Sampling Plan beginning in the May 2020 to
characterize PFAS concentrations in the Open Channel to Outfall 002
downstream of the confluence with discharge from the DuPont area (Geosyntec,
2020c).
• Location 10A was added to the Sampling Plan in May 2020 to characterize PFAS
concentrations of the combined Chemours Monomers IXM NCCW and
stormwater discharge (Geosyntec, 2020c).
• Location 23B was added to the Sampling Plan in June 2019 to evaluate the
Kuraray laboratory process wastewater, an input to the Terracotta pipe.
4.2 Field Methods
Field methods used during the Initial Characterization period are documented in previous
quarterly reports. The following sub-sections summarize these field methods. Appendix
A provides a detailed description of field methods for the August 2020 event.
4.2.1 General Field Methods
Equipment was inspected by the field program supervisor, decontaminated, and
calibrated daily prior to use in the field, according to the manufacturer’s
recommendations. Field parameters (e.g., pH, temperature, turbidity) were measured
with a water quality meter prior to sample collection for grab samples, and for temporal
composite samples, once during composite sampling (collected directly from the water
stream), and once after composite sampling (collected from the autosampler reservoir).
A field notebook and location-specific field forms were used to record information
regarding additional items such as quality assurance/ quality control (QA/QC), sample
identifications, color, odor, and other field observations.
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Field QA/QC samples, including field duplicates, equipment blanks, field blanks, and trip
blanks were collected and analyzed during the bimonthly sampling events as described
in Appendix A and Geosyntec (2019b, 2019c, 2020a, 2020b, and 2020c).
Upon sample collection, labelled and containerized samples were placed inside an
insulated sample cooler with ice. Prior to shipment of the samples to the laboratory, a
chain of custody (COC) form was completed identifying sample locations, sample
identification numbers, and specific laboratory analyses to be performed on the samples.
COCs were signed by the field personnel relinquishing the samples to the courier and
were signed by the laboratory upon receipt of the cooler.
4.2.2 Grab Sampling Methods
Grab samples were collected from locations where temporal variability over the course
of one day was not expected. These locations include non-process wastewater only
locations (Locations 6A, 6B, 24A, 24B, and 24C), select process wastewater only
locations (Locations 19A and 19B), and the Sediment Basin South location (Location
21A), as identified in Table 2 and shown on Figure 2. All grab samples were collected by
directly filling the HDPE bottle with the sample. Other locations collected as grab
samples during the Initial Characterization period are identified below:
• Location 7B was collected as a grab sample for the April and June 2019 events
due to limited autosampler availability. This location was collected as a temporal
composite sample for the August 2019 event and all further sampling events.
• Locations 18 and 23A were collected as four grab samples over four hours during
the August 2019 event to assess temporal variability at these locations. Due to
temporal variability, future samples were collected as temporal composites.
• Location 22 was collected as a temporal composite beginning in the April 2020
event. All previous samples at this location were grab samples.
4.2.3 Temporal Composite Sampling Methods
Temporal composite samples were collected during the bimonthly sampling events from
locations where variability was expected to potentially be significant within a short time
frame (e.g., one day). These locations, identified in Table 2 and shown on Figure 2,
include those within the site conveyance network and the intake and outfall locations,
since these locations can have highly variable dissolved and suspended constituent loads
over short time periods. Temporal composite samples were collected using a dedicated
Teledyne 6712C autosampler equipped with a rain gauge, HDPE tubing, silicon tubing,
and an HDPE sample reservoir. During dry sampling events, autosamplers integrated
water over a four-hour sample collection period. During wet sampling events, the
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integration time on the autosamplers was set to correspond to the duration of the storm
event.
4.2.4 Wet Event Sampling Methods
The May/June 2020 event included a wet sampling event in May 2020 and a dry sampling
event in June 2020. Locations that contain stormwater (Locations 1, 2, 3, 4, 5, 7A, 7B,
7C, 8, 9, 10, 10A, 11, 12, 13, 14, 15, 20, and 21A) were sampled on May 20, 2020 during
a storm event following an 11-day antecedent dry period. The storm event began on May
18, 2020 and lasted through May 21, 2020; a total of 3.2 inches of rainfall fell during the
storm event. Composite samples were collected over a 3.75-hour period during the peak
intensity of the storm event. In accordance with the PFAS Characterization Sampling
Plan (Geosyntec, 2019a), Locations 6A, 6B, 8, 18, 19A, 19B, 22, 23A, 23B, 24A, 24B,
and 24C were collected during dry weather on June 3, 2020, following 72 hours with less
than 0.5 inches of rain.
4.3 Laboratory Methods
Samples were analyzed for PFAS by the following methods:
• Table 3+ Laboratory Standard Operating Procedure (SOP); and
• EPA Method 537 Mod Laboratory SOP (EPA 537M).
PFAS reported under each of these methods are listed in Table 3.
Throughout the Initial Characterization period, laboratory analyses were performed
largely in accordance with the PFAS Characterization Sampling Plan (Geosyntec, 2019a)
and within the guidelines specified by the laboratory SOPs. The collection frequency of
field duplicates, matrix spike / matrix spike duplicates (MS/MSD), trip blanks, and
equipment blanks was largely in accordance with the PFAS Characterization Sampling
Plan (Geosyntec, 2019a). Deviations, as listed in Appendix A and Geosyntec (2019b,
2019c, 2020a, 2020b, and 2020c), were acceptable as previous QA/QC samples met
criteria.
All data were reviewed using the Data Verification Module (DVM) within the LocusTM
Environmental Information Management (EIM) system, which is a commercial software
program used to manage data. Following the DVM process, a manual review of the data
was conducted. The data usability, in view of the project’s data quality objectives
(DQOs), was assessed and the data were entered into the EIM system. Details regarding
the data review process are provided in Appendix A for the August 2020 event and
Geosyntec (2019b, 2019c, 2020a, 2020b, and 2020c) for other bimonthly sampling
events.
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5. ASSESSMENT OF PARAGRAPH 11(C) INITIAL CHARACTERIZATION
This section presents an assessment of the key observations and summary statistics
observed over the 18-month Initial Characterization period. Observations in this section
are based on total Table 3+ concentrations and total EPA 537M concentrations. Table 3+
PFAS compounds are often related to Chemours manufacturing processes whereas EPA
537M PFAS compounds are generally associated with firefighting foams, municipal
WWTPs, and other background sources. The remainder of this section discusses the
presentation of Table 3+ results and PFAS data observations, including a statistical
evaluation of the data.
5.1 Presentation of Results Table 3+ 17 Compounds
For clarity, the text and figures of this report describe the Table 3+ 17 compound sums
while both Table 3+ 17 compound and Table 3+ 20 compound sums are included in the
tables.
As reported in the Matrix Interference During Analysis of Table 3+ Compounds memorandum
(Geosyntec, 2020d), 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.
5.2 Results Tables and Figures
The observations and assessment described in this section are based on the following
figures:
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• Figure 3A presents summary statistics for HFPO-DA1, PFMOAA2, and PMPA3
concentrations for locations that reach Outfall 002. Table 4 represents these data
tabularly;
• Figure 3B presents summary statistics for total Table 3+ concentrations and total
EPA 537M concentrations for locations that reach Outfall 002. Table 5 represents
these data tabularly;
• Figures 4A – 4F present time series plots for total Table 3+ concentrations. Each
time series plot displays the total Table 3+ concentrations observed during each
event at the intake river water at the Facility (Location 1) and at other locations
as grouped by sample location type described in Section 4.1 (e.g., Stormwater,
NCCW, etc.).;
• Figures 5A and 5B display the median total Table 3+ and total EPA 537M
concentration by location for all sampling locations, respectively;
• Table 6 presents results from the Wilcoxon Rank Sum test evaluation; and
• Appendix C presents a complete summary of the PFAS concentrations in the
samples collected during the 18-month initial characterization period.
Median concentrations are discussed throughout this section. The median was selected as
the measure of central tendency for this discussion because the data are often skewed and
not normally distributed, as is common for environmental data. The median represents a
robust measure of central tendency not influenced by outliers.
5.3 Statistical Assessment Technique
The data set collected for each location in the sampling program was compared to
background concentrations of the River Intake Water data set using the Wilcoxon Rank
Sum. The Wilcoxon Rank Sum test is a non-parametric test used to evaluate whether the
distributions of total EPA 537M PFAS and/or total Table 3+ PFAS concentrations at each
location were statistically different than those at the intake river water at the Facility
(Location 1). The Wilcoxon Rank Sum test is appropriate for small sample sizes that are
not normally distributed. The tests were conducted at the 5% level of significance, i.e., α
= 0.05. Therefore, a p-value result greater than 0.05 indicates the subject location
concentration distribution was not significantly different from the distribution at Location
1, i.e., is not adding PFAS significantly above background concentrations. A p-value

1 HFPO-DA - hexafluoropropylene oxide dimer acid 2 PFMOAA - 2,2-difluoro-2-(trifluoromethoxy) acetic acid
3 PMPA - perfluoromethoxypropyl carboxylic acid
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result less than 0.05 indicates the subject location concentration distribution was
significantly higher (positive result statistic) or lower (negative result statistic) than the
distribution collected from Location 1. For example, a positive result statistic and a p-
value less than 0.05 indicate that the location is contributing PFAS above median
background concentrations. Table 6 presents results from the non-parametric Wilcoxon
Rank Sum test evaluation for total Table 3+ and total EPA 537M concentrations in the
investigative samples. Stormwater-only locations were only sampled during one (1)
sampling event (May/June 2020); therefore, results from all stormwater locations were
grouped into one dataset and compared to the dataset from Location 1. The results of the
statistical assessment are described on a location category basis in the next sub-section.
5.4 Conveyance Network PFAS Data Observations
This sub-section presents the assessment of results from the nine sampling events.
Observations are summarized in the list and table below and described in the remainder
of this section on a per location category basis.
Summary of Observations
• Across all locations EPA 537M PFAS were not statistically different or higher
than intake river water data with the exception of one location (23A) on the
Terracotta pipe which will be decommissioned in 2021;
• Table 3+ PFAS in NCCW-only locations and non-Chemours process wastewater
locations are similar to background concentrations observed at the intake river
water and are not statistically different or significantly lower, with the exception
of one location (23B) which decreased to intake concentration levels over the
course of the program. Location 23B also drains through the Terracotta pipe
which will be decommissioned in 2021;
• Table 3+ PFAS were statistically higher for locations which either contained
stormwater or water related to the WWTP effluent; and
• Monomers IXM area flows containing stormwater have higher concentrations of
Table 3+ PFAS during both wet and dry weather compared to other stormwater-
NCCW locations which decrease during dry periods. Pursuant to Paragraph 4(a)
of the Addendum to Consent Order Paragraph 12 (CO Addendum) Chemours will
capture and treat stormwater in the catchment area shown on Attachment 6 of the
CO Addendum; this system includes separating NCCW and stormwater flows in
the Monomers IXM area.
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Location Category
EPA 537M PFAS Statistical
Assessment Outcome
Table 3+ PFAS
Statistical Assessment
Outcome
Non-Chemours Process
Wastewater
Not Different or Lower than
Intake
Not Different or Lower
than Intake*
Non-Contact Cooling Water Not Different than Intake Not Different than Intake
Stormwater Not Different than Intake Greater than Intake
Stormwater-NCCW Not Different than Intake
Some Greater than Intake
(stormwater from
Monomers IXM)
Wastewater Treatment Plant Not Different than Intake**
(influent and effluent only) Greater than Intake
Combined Flows to
Outfall 002 Not Different than Intake Greater than Intake
(WWTP and stormwater)
* Location 23B concentrations were initially higher than the intake river water but have declined and been
similar to the intake since January 2020. Flows from Location 23B discharge to the Terracotta pipe which
is being decommissioned in 2021.
** Wastewater treatment plant influent and effluent EPA 537M concentrations were not statistically
different or higher from the intake, but an upstream location (23A) in the Terracotta pipe did have elevated
EPA 537M concentrations. This source to the wastewater treatment plant will be removed with the planned
decommissioning of the Terracotta pipe in 2021.

5.4.1 Intake River Water at Facility
As observed in Figures 4A – 4F, total Table 3+ concentrations at Location 1 were
relatively consistent over the 18-month sampling program, varying between 48 ng/L to
120 ng/L with a median of 58 ng/L (Figures 3B and 5A; Table 4). Total EPA 537M
concentrations were also consistent, varying between 30 ng/L to 190 ng/L with a median
of 55 ng/L (Figures 3B and 5B; Table 5). The samples collected at Location 1 were
considered to represent the background concentration of PFAS at the facility. Detected
PFAS at Location 1 were generally observed in other facility locations that derive water
from the river intake.
5.4.2 Non-Chemours Process Wastewater
Figure 4A presents a time series plot of total Table 3+ data collected from non-Chemours
process wastewater locations. Process wastewater total Table 3+ concentrations from
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Kuraray (Location 18) and DuPont (Locations 19A and 19B) were consistently lower
than or similar to the intake river water (Location 1) and generally reduced over time
(Figure 4A). The distribution of total Table 3+ and total EPA 537M concentrations for
non-Chemours process wastewater were similar to the intake river water (Figures 3A, 3B,
5A, and 5B; Tables 4 and 5). The statistical assessment indicated that for both EPA 537M
PFAS and Table 3+ compounds, PFAS concentrations in Non-Chemours Process
Wastewater concentrations are not different or lower than concentrations from the intake
river water at the Facility for all locations, except for Kuraray Laboratory process
wastewater (Location 23B), which was significantly greater for Table 3+ compounds only
(Table 6). Location 23B concentrations were initially higher than the intake river water
(Location 1) but have declined and been similar to the intake since January 2020 (Figure
4A). Flows from Location 23B discharge to the Terracotta pipe which will be
decommissioned in 2021.
5.4.3 Non-Contact Cooling Water
Figure 4B presents a time series plot of total Table 3+ data collected from NCCW
locations and indicates the total Table 3+ concentrations from NCCW are consistently
similar to Location 1. One data point at Location 24C in December 2019 was an order of
magnitude higher than the intake value. This isolated event is not reflective of long term
NCCW concentrations (Geosyntec, 2020a). NCCW concentrations returned and
remained at normal levels in the following January 2020 event. The statistical evaluation
indicated total Table 3+ and total EPA 537M concentrations for NCCW were not
significantly different from the intake river water (Figures 3A, 3B, 5A, and 5B; Tables 4,
5, and 6).
5.4.4 Stormwater
Figure 4C presents total Table 3+ data collected from stormwater-only locations in the
May/June 2020 event. All other bimonthly sampling events were collected during dry
weather; stormwater-only locations were either dry or not hydraulically connected to
Outfall 002 during other sampling events. Based on statistical evaluation of the May/June
2020 event, Table 3+ PFAS are present in stormwater at significantly higher
concentrations compared to the intake river water at the facility (Location 1) (Table 6).
The sample representing stormwater from the Monomers IXM area (Location 10) had the
highest total Table 3+ PFAS concentration (9,800 ng/L) of all the stormwater locations
(Figure 4C, Appendix C). Pursuant to paragraph 4(a) of the CO Addendum, Chemours
will capture and treat stormwater in the catchment area shown on Attachment 6 of the CO
Addendum. Total EPA 537M concentrations at stormwater locations were similar to
intake river water concentrations (Figures 3B and 5B; Table 5); the statistical assessment
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indicated EPA 537M concentrations for stormwater from the May/June 2020 event were
not significantly different than the intake river water (Table 6).
5.4.5 Stormwater-NCCW
Figure 4D presents a time series of total Table 3+ data collected from stormwater-NCCW
locations. These locations contain combined stormwater and NCCW flows. As shown
previously, NCCW is not a contributor of PFAS to Outfall 002 while stormwater,
primarily from the Monomers IXM Area, is a contributor. These stormwater-NCCW
locations contain Table 3+ PFAS at concentrations greater than the river intake. The two
controlling factors are if the samples were collected during wet weather or are in or
downstream from the Monomers IXM Area.
As a specific example of the effect of wet weather events, the samples representing the
western portion of the Facility (Location 7A), which primarily contain Kuraray NCCW,
were similar to the intake river water (Location 1) except during the May 2020 wet
weather event when stormwater was being actively added to these flows.
Table 3+ PFAS concentrations in stormwater-NCCW locations in or downstream of the
Monomers IXM area (Locations 9, 10A, 15, and 21A) were generally higher than
concentrations at other stormwater-NCCW locations (Locations 7A, 12, 13, and 14)
during both dry and wet weather sampling events. NCCW from the Monomers IXM area
has similar concentrations to the intake water, therefore elevated concentrations observed
during both dry and wet events are likely due to ongoing PFAS contributions from
stormwater inflows that are not fully flushed from the sampling locations. NCCW and
stormwater flows from the Monomers IXM area will be separated and the stormwater
treated as pursuant to paragraph 4(a) of the CO Addendum previously discussed. The
statistical evaluation indicated Table 3+ PFAS concentrations from stormwater-NCCW
in locations in or downstream of the Monomers IXM area with enough samples for
statistical comparison were significantly higher than the intake river water (Table 6).
The distribution of EPA 537M concentrations at all stormwater-NCCW locations were
similar to the intake river water concentrations (Figures 3B and 5B; Table 5). The
statistical assessment indicated EPA 537M concentrations at all stormwater-NCCW
locations were not significantly different from the intake river water for those locations
with enough samples for statistical comparison (Table 6).
5.4.6 Wastewater Treatment Plant
Figure 4E presents a time series of total Table 3+ data collected from the WWTP
locations. The total Table 3+ concentrations at the WWTP effluent (Location 8), the
combined WWTP influent (Location 22), and the Terracotta pipe (Location 23A) are
elevated compared to, and statistically higher than, the intake river water (Location 1) for
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all events (Figures 4E and 5A; Table 6). Pursuant to paragraph 4(d), Chemours is
preparing a report on sources of PFAS to the WWTP by May 31, 2021. Chemours and its
tenant Kuraray are also decommissioning the Terracotta pipe. Prior to November 2017,
the Terracotta pipe transmitted Chemours process wastewater to the WWTP.
The distribution of total EPA 537M concentrations at the WWTP influent and effluent
were similar to, and not significantly different from, total EPA 537M intake river water
concentrations (Figures 3B and 5B; Tables 5and 6). The median total EPA 537M
concentration at the Terracotta pipe (Location 23A) was over 5 times greater than the
median total EPA 537M concentration at Location 1 (Figure 3B, Table 5), and the
statistical evaluation indicated Location 23A was the only location with EPA 537M
concentrations significantly higher than the intake river water (Table 6). As noted above,
this component of the WWTP influent stream, the Terracotta pipe, is being
decommissioned in 2021.
5.4.7 Combined Flows to Outfall 002
Figure 4F presents a time series of total Table 3+ data collected from the locations
representing the combined flows to Outfall 002. These locations contain Table 3+ PFAS
from upstream sources including combinations of WWTP effluent, NCCW, and
stormwater. The locations representing the combined flows to Outfall 002 have Table 3+
PFAS concentrations that are significantly greater than the intake river water for those
locations with enough samples for statistical comparison (Figures 3B and 5A; Tables 5
and 6). The increases over intake river water concentrations are interpreted to originate
from both stormwater and WWTP effluent. First, the two highest total Table 3+
concentrations at these locations were measured during the wet weather May/June 2020
event indicating the stormwater contributions. Second, Location 7A upstream of the
WWTP effluent is routinely lower in concentration than Location 7B downstream of the
WWTP effluent.
The statistical assessment indicated EPA 537M concentrations at the locations
representing combined flows to Outfall 002 were not significantly different from the
intake river water for those locations with enough samples for statistical comparison
(Table 6).
6. PARAGRAPH 11(D) SAMPLING PLAN UPDATES
Based on the findings in Section 5 and planned activities at the Facility described below,
several revisions are recommended to the Sampling Plan for the Ongoing Sampling
program pursuant to Paragraph 11(d). These recommendations fall into two categories:
1. Remove sampling locations and analyte groups that are not contributing PFAS to
Outfall 002 or are characterized by other sampling locations and programs; and
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2. Reconfiguration of the sampling locations in the Monomers IXM area based on
the upcoming separation of NCCW and stormwater flows and stormwater
treatment.
Recommendations and rationale for the proposed Sampling Plan revisions are provided
in the table below. The proposed sample locations for Paragraph 11(d) after completion
of the stormwater treatment system in June 2021 are provided in Figure 6.
Recommendation Rationale
Continue analyzing EPA 537M
compounds at the intake river water
at the Facility (Location 1) and
Outfall 002 (Location 20) only.
Total EPA 537M concentrations were not
significantly different or were significantly less
than the total EPA 537M concentrations at the
river intake water.4 The intake river water at the
facility (Location 1) and Outfall 002 (Location
20) are proposed to continue to be analyzed for
EPA 537M compounds.
Replace the sampling locations in
the Monomers IXM area
(Locations 9, 10, 10A, 24A, 24B,
24C) with one new sample location
(Location 9A) representing the
combined NCCW from Monomers
IXM upon completion of the
Monomers IXM stormwater
treatment system.
This recommendation is supported because: (1)
NCCW Locations 24A, 24B, and 24C have
contained low and relatively homogenous levels
of PFAS relative to the intake water at the facility
(Location 1) and will be combined into one piped
water stream, (2) stormwater from the Monomers
IXM area will be characterized as a part of
stormwater treatment system sampling program,
and (3) combined NCCW and stormwater from
the Monomers IXM area will be sampled
downstream at Location 15.
Replace sampling of inputs to the
WWTP (Locations 6A, 6B, 18,
19A, 19B, 23A, and 23B) with
continued sampling of influent
(Location 22).
This recommendation is supported because: (1)
Locations 6A, 6B, 18, 19A, and 19B are not
sources of PFAS, and (2) individual sources to
the WWTP are being investigated as part of the
ongoing supplemental WWTP sampling plan.
Replace upstream stormwater-only
locations from the western portion
Stormwater from the western portion of the
facility is characterized downstream of Locations

4 The exception is location 23A on the Terracotta pipe which is being decommissioned.
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Recommendation Rationale
of the facility (Locations 2, 3, 4,
and 5) with downstream combined
sampling at Location 7A.
2, 3, 4, and 5 at Location 7A during wet weather
events.
7. SUMMARY AND RECOMMENDATIONS
Pursuant to Consent Order Paragraph 11(c), this final quarterly report summarizes results
and observations from the nine bimonthly sampling events collected during the 18-month
initial characterization period. The objective of the initial characterization period was to
characterize the concentrations of PFAS in the raw water intake, process wastewater, non-
process wastewater, and stormwater at the Facility.
Summary of Findings
The following conclusions can be drawn based on the samples collected during the initial
characterization period:
• The intake river water at the facility (Location 1) contains PFAS before this water
is used at the Facility. PFAS detected at Location 1 represent the background level
of PFAS at other sampling locations.
• Across all locations, EPA 537M PFAS were not statistically different or higher
than intake data with the exception of one location (23A) on the Terracotta pipe
which is being decommissioned in 2021.
• Non-Chemours process wastewater locations (Locations 18, 19A, 19B, and 23B)
and NCCW only locations (Locations 6A, 6B, 24A, 24B, and 24C) generally have
low PFAS concentrations, similar to or less than those observed at the intake river
water at the Facility.
• The primary sources of total Table 3+ PFAS concentrations to Outfall 002 are (1)
locations comprising both stormwater and non-process wastewater from the
Monomers IXM area, (2) stormwater-only locations, and (3) the WWTP effluent,
including PFAS loadings from the Terracotta pipe which prior to November 2017
transmitted Chemours process water to the WWTP.
The degree of PFAS contributions from the sources outlined in the last bullet above will
be mitigated through on-going present and planned future actions, specifically:
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• Continued use of the Thermal Oxidizer and other air emissions controls at the
Facility reduces aerial emissions of PFAS. This mitigates future PFAS loading to
surfaces and subsequent stormwater concentrations;
• Pursuant to the CO Addendum, the in-progress separation of NCCW and
stormwater flows occurring in the Monomers IXM Area and the 2021 planned
treatment of stormwater flows in this area will reduce PFAS contributions from
the Monomers Area; and
• The planned 2021 decommissioning of the Terracotta pipe will reduce PFAS
contributions to the WWTP.
Summary of Recommendations
Based on these findings above, the following recommendations are made as the sampling
program transitions from the initial characterization period of Paragraph 11(c) to Ongoing
Sampling in Paragraph 11(d):
• Continue analyzing EPA 537M at the intake river water at Location 1 and
Location 20 only;
• Upon completion of the Monomers IXM stormwater treatment system, replace
Locations 9, 10, 10A, 24A, 24B, and 24C with one new sample location
representing the combined NCCW;
• Replace locations representing inputs to the WWTP (Locations 6A, 6B, 18, 19A,
19B, 23A, 23B) with ongoing sampling of the WWTP influent (Location 22); and
• Replace stormwater-only Locations 2, 3, 4, and 5 with ongoing sampling of
downstream Location 7A.
Pursuant to Paragraph 11(d), over the next two years starting in January 2021, Chemours
will continue to collect bimonthly samples to characterize PFAS in the intake river water,
process wastewater, non-process wastewater, and stormwater at the Facility. Chemours
requests approval from DEQ to perform the ongoing sampling in accordance with these
recommendations by January 8, 2021. Results will be reported semi-annually, i.e. every-
other quarter, within 90 days of the previous semiannual period. The first report will be
submitted within 90 days of the end Quarter 2, 2021.
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8. REFERENCES
Geosyntec, 2019a. PFAS Characterization Sampling Plan. May 6, 2019.
Geosyntec, 2019b. Characterization of PFAS in Process and Non-Process Wastewater
and Stormwater: Quarterly Report #1. July 31, 2019.
Geosyntec, 2019c. Characterization of PFAS in Process and Non-Process Wastewater
and Stormwater: Quarterly Report #2. October 31, 2019.
Geosyntec, 2019d. Assessment of HFPO-DA and PFMOAA in Outfall 002 Discharge
and Evaluation of Potential Control Options. August 2019.
Geosyntec, 2020a. Characterization of PFAS in Process and Non-Process Wastewater
and Stormwater: Quarterly Report #3. January 31, 2020.
Geosyntec, 2020b. Characterization of PFAS in Process and Non-Process Wastewater
and Stormwater: Quarterly Report #4. April 30, 2020.
Geosyntec, 2020c. Characterization of PFAS in Process and Non-Process Wastewater
and Stormwater: Quarterly Report #5. July 31, 2020.
Geosyntec, 2020d. Matrix Interference During Analysis of Table 3+ Compounds.
Chemours Fayetteville Works. July 31, 2020.

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TABLES

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TABLE 1PARAGRAPH 11(b) SAMPLE LOCATION SUMMARYChemours Fayetteville Works, North CarolinaGeosyntec Consultants of NC P.C.Intake River Water at Facility 1Discharge point of excess river water (i.e., water drawn from the Cape Fear River, but not used as process water or NCCW) to characterize background levels of PFASTemporal Composite18 Kuraray process wastewater Grab/Temporal Composite*19A DuPont process wastewater, Plant 1Grab19B DuPont process wastewater, Plant 2Grab23B Kuraray laboratory process wastewaterGrab6A Kuraray southern leased area NCCW discharge - Vacuum CondenserGrab6B Kuraray southern leased area NCCW discharge - Resins AreaGrab24A Chemours Monomers IXM Vinyl Ethers South NCCWGrab24B Chemours Monomers IXM Line 3 and Line 4 Extruder NCCWGrab24C Chemours Monomers IXM Water Return Header NCCWGrab2 Kuraray northern leased area stormwater dischargeTemporal Composite3 Chemours PPA area stormwater dischargeTemporal Composite4 Combined stormwater discharge from Kuraray northern leased area and Chemours PPA areaTemporal Composite5 Kuraray southern leased area stormwater Temporal Composite10 Chemours Monomers IXM area stormwater dischargeTemporal Composite11 Stormwater discharge from portion of grassy field to north of decommissioned Chemours Teflon area Temporal Composite7A Combined stormwater and NCCW discharge from western portion of the FacilityTemporal Composite9Chemours Monomers IXM NCCW and stormwater discharge including stormwater from Vinyl Ethers South and Vinyl Ethers NorthTemporal Composite10A Combined Chemours Monomers IXM NCCW and stormwater dischargeTemporal Composite12 DuPont area southern drainage ditch stormwater discharge and NCCWTemporal Composite13 DuPont area northern drainage ditch stormwater discharge and NCCWTemporal Composite14 DuPont area southeast stormwater and NCCW discharge Temporal Composite15 Combined stormwater and NCCW discharge from eastern portion of the FacilityTemporal Composite21A Sediment Basin SouthGrab21B Sediment Basin NorthGrab8 Outfall 001 treated non-Chemours process wastewater discharge to open channel to Outfall 002 Temporal Composite22 WWTP combined influentGrab/Temporal Composite*23A Kuraray northern leased area combined process wastewater and NCCW; open grate on Terracotta pipeGrab/Temporal Composite*7BCombined stormwater and NCCW discharge from western portion of the Facility and treated discharge from WWTPGrab/Temporal Composite*7CCombined stormwater and NCCW discharge from western portion of the Facility, the eastern portion of the Facility, and the DuPont Area, and treated discharge from WWTPTemporal Composite20 Outfall 002 pipe to Cape Fear River upstream of sumpTemporal Composite16 Chemours Monomers IXM Area combined process wastewater Grab17AChemours PPA Area waste acid trailerGrab17B Chemours PPA Area waste rinse water trailerGrabNotesSample locations refer to locations identified in Figure 2.Temporal composite samples were integrated over 4 hours in dry weather, or less time to line up with the duration of a storm event in wet weather.Intake River Water at Facility sample location represents background concentrations of PFAS.Non-Chemours Process Wastewater sample locations contain process wastewater from non-Chemours manufacturing areas.NCCW sample locations contain non-process wastewater from Kuraray and Chemours manufacturing areas.Stormwater sample locations contain stormwater only.Stormwater-NCCW sample locations are locations containing both stormwater and non-process wastewater from throughout the Facility.Wastewater Treatment Plant sample locations contain process wastewater from non-Chemours manufacturing areas and non-process wastewater from throughout the Facility.Combined Flows to Outfall 002 contain process wastewater, non-process wastewater, and stormwater from throughout the Facility.Chemours Process Wastewater sample locations contain Chemours process wastewater only and do not contribute flow to Outfall 002. The open grate on Terracotta pipe was formerly referred to as the manhole on Terracotta pipe.IXM - ion exchange membraneNCCW - non-contact cooling waterPFAS - per- and polyfluoroalkyl substances PPA - polymer processing aid WWTP - Wastewater treatment plant*Select locations were collected as grab samples and as composite samples during different sampling events. Details for each sample are provided in Table 2.Stormwater-NCCWWastewater Treatment PlantCombined Flows to Outfall 002Chemours Process WastewaterSample Included in May 2019 PFAS Characterization PlanNon-Chemours Process WastewaterNCCWStormwaterSample Location IDSample Location DescriptionSample CategorySampling MethodTR0795ADecember 2020DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE 2SUMMARY OF SAMPLES COLLECTEDChemours Fayetteville Works, North CarolinaGeosyntec Consultants of NC P.C.April(Q2)June (Q2) August (Q3) October (Q4)December(Q4)January (Q1) April (Q2)May (Q2)1June (Q2)1August(Q3)Intake River Water at Facility1Discharge point of excess river water (i.e., water drawn from the Cape Fear River, but not used as process water or NCCW) to characterize background levels of PFASIntake River Water at FacilityTemporal CompositeYESYESYESYESYESYESYESYESNS2YES18 Kuraray process wastewater Non-Chemours Process WastewaterGrab/ Temporal Composite7YESYESYESYESYESYESYESNS2YESYES19A DuPont process wastewater, Plant 1Non-Chemours Process WastewaterGrab YESYESYESYESYESYESYESNS2YESYES19B DuPont process wastewater, Plant 2Non-Chemours Process WastewaterGrab YESYESYESYESYESYESYESNS2YESYES23B Kuraray laboratory process wastewaterNon-Chemours Process WastewaterGrabNS10YESNS10YESYESYESYESNS2YESYES6A Kuraray southern leased area NCCW discharge - Vacuum CondenserNCCWGrab YESYESYESYESYESYESYESNS2YESYES6B Kuraray southern leased area NCCW discharge - Resins AreaNCCWGrab YESYESYESYESYESYESYESNS2YESYES24A Chemours Monomers IXM Vinyl Ethers South NCCWNCCWGrab YESYESYESNS11YESYESYESNS2YESYES24B Chemours Monomers IXM Line 3 and Line 4 Extruder NCCWNCCWGrab YESYESYESYESYESYESYESNS2YESYES24C Chemours Monomers IXM Water Return Header NCCWNCCWGrab YESYESYESNS11YESYESYESNS2YESYES2 Kuraray northern leased area stormwater dischargeStormwaterTemporal CompositeDRYDRYDRYDRYDRYDRYDRYYESNS2DRY3 Chemours PPA area stormwater discharge StormwaterTemporal CompositeDRY DRY DRY DRY DRY DRY DRY YESNS2DRY4 Combined stormwater discharge from Kuraray northern leased area and Chemours PPA area StormwaterTemporal CompositeDRY DRY DRY DRY DRY DRY DRY YESNS2DRY5 Kuraray southern leased area stormwater StormwaterTemporal CompositeDRY DRY DRY DRY DRY DRY DRY YESNS2DRY10 Chemours Monomers IXM area stormwater discharge StormwaterTemporal CompositeYES DRY YES YES YES YESNS5YESNS2DRY11Stormwater discharge from portion of grassy field to north of decommissioned Chemours Teflon areaStormwaterTemporal CompositeDRY DRY DRY DRY DRY DRY DRY YESNS2DRY7A Combined stormwater and NCCW discharge from western portion of the FacilityStormwater-NCCWTemporal CompositeYESYESYESYESYESYESYESYESNS2YES9Chemours Monomers IXM NCCW and stormwater discharge including stormwater from Vinyl Ethers South and Vinyl Ethers NorthStormwater-NCCWTemporal CompositeYESYESYESYESYESYESYESYESNS2YES10A Combined Chemours Monomers IXM NCCW and stormwater dischargeStormwater-NCCWTemporal CompositeNS4NS4NS4NS4NS4NS4NS4YESNS2YES12 DuPont area southern drainage ditch stormwater discharge and NCCWStormwater-NCCWTemporal CompositeDRYDRYYESDRYYESDRYDRYYESNS2YES13 DuPont area northern drainage ditch stormwater discharge and NCCWStormwater-NCCWTemporal CompositeDRYDRYDRYDRYDRYDRYDRYYESNS2DRY14 DuPont area southeast stormwater and NCCW discharge Stormwater-NCCWTemporal CompositeYES YES YES YES YES YES YES YESNS2YES15 Combined stormwater and NCCW discharge from eastern portion of the FacilityStormwater-NCCWTemporal CompositeYESYESYESYESYESYESYESYESNS2YES21A Sediment Basin South Stormwater-NCCW Grab YES YES YES YES YES YES YESYESNS2YES21B Sediment Basin North Stormwater-NCCW GrabNS8NS8NS8NS8NS8NS8NS8NS8NS8NS88 Outfall 001 treated non-Chemours process wastewater discharge to open channel to Outfall 002Wastewater Treatment PlantTemporal CompositeYES YES YES YES YES YES YES YES YES YES22 WWTP combined influentWastewater Treatment PlantGrab/ Temporal Composite9YESYESYESYESYESYESYESNS2YESYES23AKuraray northern leased area combined process wastewater and NCCW; open grate on Terracotta pipeWastewater Treatment PlantGrab/ Temporal Composite7YESYESYESYESYESYESYESNS2YESYESSample Location IDNon-Chemours Process WastewaterNCCWStormwaterStormwater-NCCWWastewater Treatment PlantSample CategorySample Location DescriptionSample CategorySampling MethodSample Collected20192020TR0795APage 1 of 2December 2020DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE 2SUMMARY OF SAMPLES COLLECTEDChemours Fayetteville Works, North CarolinaGeosyntec Consultants of NC P.C.April(Q2)June (Q2) August (Q3) October (Q4)December(Q4)January (Q1) April (Q2)May (Q2)1June (Q2)1August(Q3)Sample Location IDSample CategorySample Location Description Sample CategorySampling MethodSample Collected201920207BCombined stormwater and NCCW discharge from western portion of the Facility and treated discharge from WWTPCombined Flows to Outfall 002Grab/ Temporal Composite3YESYESYESYESYESYESYESYESNS2YES7CCombined stormwater and NCCW discharge from western portion of the Facility, the eastern portion of the Facility, and the DuPont Area, and treated discharge from WWTPCombined Flows to Outfall 002Temporal CompositeNS4NS4NS4NS4NS4NS4NS4YESNS2YES20 Outfall 002 pipe to Cape Fear River upstream of sumpCombined Flows to Outfall 002Temporal CompositeYES YES YES YES YES YES YES YESNS2YES16 Chemours Monomers IXM Area combined process wastewater Chemours Process WastewaterGrab YESYESNS6NS6NS6NS6NS6NS6NS6NS617A Chemours PPA Area waste acid trailerChemours Process WastewaterGrab YESYESNS6NS6NS6NS6NS6NS6NS6NS617B Chemours PPA Area waste rinse water trailerChemours Process WastewaterGrab YES YESNS6NS6NS6NS6NS6NS6NS6NS6Notes:Sample EventsApril 2019 event (Q2) - 24 April 2019June 2019 event (Q2) - 27 and 28 June 2019August 2019 event (Q3) - 21 and 22 August 2019October 2019 event (Q4) - 9 and 10 October 2019December 2019 event (Q4) - 20 and 23 December 2019January 2020 event (Q1) - 29 and 31 January 2020April 2020 event (Q2) - 28 April 2020May/June 2020 event (Q2) - 20 May and 3 June 2020August 2020 event (Q3) - 26 August 2020Sample numbers refer to locations identified in Figure 2.All temporal composite samples collected in dry weather were integrated over 4 hours. Temporal composite samples collected during the storm event in May 2020 were integrated over up to 2 hours to line up with the storm event.1 - Samples collected in May 2020 and June 2020 are considered one sampling event, the May/June 2020 event, which was subdivided into a storm event in May for sample locations with stormwater flows with non-stormwater flow locations collected in June.3 - Location 7B was collected as a grab sample for the April and June 2019 events due to limited autosampler availability. This location was collected as a temporal composite sample for the August 2019 event and all further sampling events.4 - Locations 7C and 10A were added to the workplan beginning in 2020 Quarter 2 (May/June 2020 event).5 - Locations 10 was not sampled in the April 2020 event because it was not hydraulically connected to the Outfall 002 at the time of sample collection, per recommendations from the fourth quarterly report of 2019 (Geosyntec, 2020b).6 - Locations 16, 17A, and 17B were removed from the sampling program as these locations did not contribute flow to Outfall 002 and were consequently not sampled after 2019 Quarter 2.7 - Locations 18 and 23A were collected as four grab samples over four hours during the August 2019 event to assess temporal variability at these locations. Due to temporal variability, subsequent samples were collected as temporal composites.8 - Location 21B was not sampled to date because this sediment pond was not in use at the time of sampling.9 - Location 22 was collected as a temporal composite beginning in the April 2020 event. All previous samples at this location were grab samples.10 - Location 23B was added to the Sampling Plan after the April 2019 event. It was sampled during the June 2019 event was but was not sampled during the August 2019 event because it had insufficient water to collect a sample.11 - Locations 24A and 24C were not sampled in October 2019 because these locations did not have flow due to Plant Turn Around. IXM - ion exchange membraneNCCW - non-contact cooling waterNS - Not sampled PFAS - per- and polyfluoroalkyl substances PPA - polymer processing aid WWTP - Wastewater treatment plant2 - For the May/June 2020 event, all locations that contain stormwater were sampled in the storm event in May. All locations that do not contain stormwater were sampled in the dry period in June. Location 8 was sampled in both the storm event in May and the dry period in June.Combined Flows to Outfall 002Chemours Process WastewaterTR0795APage 2 of 2December 2020DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE 3
PFAS AND ASSOCIATED ANALYTICAL METHODSChemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
HFPO-DA*Hexafluoropropylene oxide dimer acid 13252-13-6 C6HF11O3
PEPA Perfluoro-2-ethoxypropionic acid 267239-61-2 C5HF9O3PFECA-G Perfluoro-4-isopropoxybutanoic acid 801212-59-9 C12H9F9O3S
PFMOAA Perfluoro-2-methoxyacetic acid 674-13-5 C3HF5O3
PFO2HxA Perfluoro-3,5-dioxahexanoic acid 39492-88-1 C4HF7O4
PFO3OA Perfluoro-3,5,7-trioxaoctanoic acid 39492-89-2 C5HF9O5
PFO4DA Perfluoro-3,5,7,9-tetraoxadecanoic acid 39492-90-5 C6HF11O6
PMPA Perfluoro-2-methoxypropionic acid 13140-29-9 C4HF7O3
Hydro-EVE Acid 2,2,3,3-tetrafluoro-3-({1,1,1,2,3,3-hexafluoro-3-[(1,2,2,2-
tetrafluoroethyl)oxy]propan-2-yl}oxy)propionic acid 773804-62-9 C8H2F14O4
EVE Acid 2,2,3,3-tetrafluoro-3-({1,1,1,2,3,3-hexafluoro-3-[(1,2,2-
trifluoroethenyl)oxy]propan-2-yl}oxy)propionic acid 69087-46-3 C8HF13O4
PFECA B Perfluoro-3,6-dioxaheptanoic acid 151772-58-6 C5HF9O4
R-EVE Pentanoic acid, 4-(2-carboxy-1,1,2,2-tetrafluoroethoxy)-2,2,3,3,4,5,5,5-octafluoro 2416366-22-6 C8H2F12O5
PFO5DA Perfluoro-3,5,7,9,11-pentaoxadodecanoic acid 39492-91-6 C7HF13O7
R-PSDA Pentanoic acid, 2,2,3,3,4,5,5,5-octafluoro-4-(1,1,2,2-tetrafluoro-2-sulfoethoxy)2416366-18-0 C7H2F12O6S
R-PSDCA Ethanesulfonic acid, 1,1,2,2-tetrafluoro-2-[1,2,2,3,3-pentafluoro-
1-(trifluoromethyl)propoxy]2416366-21-5 C6H2F12O4S
Hydrolyzed PSDA Acetic acid, 2-fluoro-2-[1,1,2,3,3,3-hexafluoro-2-(1,1,2,2-tetrafluoro-2-sulfoethoxy)propoxy]2416366-19-1 C7H3F11O7S
NVHOS 1,1,2,2,4,5,5,5-heptafluoro-3-oxapentanesulfonic acid; or 2-(1,2,2,2-ethoxy)tetrafluoroethanesulfonic acid; or 1-(1,1,2,2-tetrafluoro-2-sulfoethoxy)-1,2,2,2-tetafluoroethane
1132933-86-8 C4H2F8O4S
PES Perfluoro-2-ethoxyethanesulfonic acid 113507-82-7 C4HF9O4S
PS Acid Ethanesulfonic acid, 2-[1-[difluoro[(1,2,2-trifluoroethenyl)oxy]methyl]-1,2,2,2-tetrafluoroethoxy]-1,1,2,2-tetrafluoro
29311-67-9 C7HF13O5S
Hydro-PS Acid
Ethanesulfonic acid, 2-[1-[difluoro(1,2,2,2-
tetrafluoroethoxy)methyl]-1,2,2,2-tetrafluoroethoxy]-1,1,2,2-
tetrafluoro
749836-20-2 C7H2F14O5S
PFBA Perfluorobutanoic acid 375-22-4 C4HF7O2
PFDA Perfluorodecanoic acid 335-76-2 C10HF19O2
PFDoA Perfluorododecanoic acid 307-55-1 C12HF23O2
PFHpA Perfluoroheptanoic acid 375-85-9 C7HF13O2
PFNA Perfluorononanoic acid 375-95-1 C9HF17O2
PFOA Perfluorooctanoic acid 335-67-1 C8HF15O
PFHxA Perfluorohexanoic acid 307-24-4 C6HF11O2
PFPeA Perfluoropentanoic acid 2706-90-3 C5HF9O2
PFTeA Perfluorotetradecanoic acid 376-06-7 C14HF27O2
PFTriA Perfluorotridecanoic acid 72629-94-8 C13HF25O2
PFUnA Perfluoroundecanoic acid 2058-94-8 C11HF21O2
PFBS Perfluorobutanesulfonate 375-73-5 C4HF9SO
PFDS Perfluorodecanesulfonate 335-77-3 C10HF21O3S
PFHpS Perfluoroheptanesulfonic acid 375-92-8 C7HF15O3S
PFHxS Perfluorohexanesulfonic acid 355-46-4 C6HF13SO3
PFNS Perfluorononanesulfonate 68259-12-1 C9HF19O3S
PFOS Perfluorosulfonic acid 1763-23-1 C8HF17SO3
PFPeS Perfluoropentane sulfonic acid 2706-91-4 C5HF11O3S
10:2 FTS Fluorotelomer sulfonate 10:2 120226-60-0 C12H5F21O3
4:2 FTS Fluorotelomer sulfonate 4:2 757124-72-4 C6H5F9O3S
6:2 FTS Fluorotelomer sulfonate 6:2 27619-97-2 C8H5F13SO3
8:2 FTS Fluorotelomer sulfonate 8:2 39108-34-4 C10H5F17O3S
NEtFOSAA N-ethyl perfluorooctane sulfonamidoacetic acid 2991-50-6 C12H8F17NO4S
NEtPFOSA N-ethylperfluoro-1-octanesulfonamide 4151-50-2 C10H6F17NO2S
NEtPFOSAE N-ethyl perfluorooctane sulphonamidoethanol 1691-99-2 C12H10F17NO3S
NMeFOSAA N-methyl perfluorooctane sulfonamidoacetic acid 2355-31-9 C11H6F17NO4S
NMePFOSA N-methyl perfluoro-1-octanesulfonamide 31506-32-8 C9H4F17NO2S
NMePFOSAE N-methyl perfluorooctane sulfonamidoethanol 24448-09-7 C11H8F17NO3S
PFDOS Perfluorododecanesulfonic acid 79780-39-5 C12HF25O3S
PFHxDA Perfluorohexadecanoic acid 67905-19-5 C16HF31O2
PFODA Perfluorooctadecanoic acid 16517-11-6 C18HF35O2
PFOSA Perfluorooctane Sulfonamide 754-91-6 C8H2F17NO2S
F-53B Major F-53B Major 73606-19-6 C8HClF16O4S
F-53B Minor F-53B Minor 83329-89-9 C10HClF20O4S
ADONA 4,8-dioxa-3H-perfluorononanoate 958445-44-8 C7H2F12O4
NaDONA NaDONA EVS1361 --
DONA DONA 919005-14-4 --
Notes:
*HFPO-DA may also appear on the EPA Method 537 Mod analyte list
EPA - Environmental Protection Agency
PFAS - per- and polyfluoroalkyl substances SOP - Standard Operating Procedure
Chemical Formula
EPA Method 537
Mod
CASN
Table 3+ Lab SOP
Analytical Method Common Name Chemical Name
TR0795A December 2020
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TABLE 4SUMMARY STATISTICS FOR HFPO-DA, PFMOAA, AND PMPAChemours Fayetteville Works, North CarolinaGeosyntec Consultants of NC, P.C.No. of SamplesNo. of DetectsMinimum Median MaximumNo. of SamplesNo. of DetectsMinimum Median MaximumNo. of SamplesNo. of DetectsMinimum Median MaximumIntake River Water at Facility1Discharge point of excess river water (i.e., water drawn from the Cape Fear River, but not used as process water or NCCW) to characterize background levels of PFAS999.8 13 309659.8 259917 26 6018 Kuraray process wastewater 12 12 3.6 8.6 120 120---12615 20 6419A DuPont process wastewater, Plant 1994.2 18 380 935.5 8.7 169713 27 34019B DuPont process wastewater, Plant 2992.2 22 75935.6 14 379612 38 12023B Kuraray laboratory process wastewater7717 35 3,200 763.7 16 200 7624 32 21,0006A Kuraray southern leased area NCCW discharge - Vacuum Condenser996.7 19 66949.9 13 249914 30 806B Kuraray southern leased area NCCW discharge - Resins Area994.5 17 41948.9 11 319917 26 5324A Chemours Monomers IXM Vinyl Ethers South NCCW15 15 8.7 17 38 15 10 6.9 10 18 15 15 21 28 9624B Chemours Monomers IXM Line 3 and Line 4 Extruder NCCW10 10 4.7 11 16 1063.2 12 15 10 10 16 23 3324C Chemours Monomers IXM Water Return Header NCCW885.6 15 270 8531015 8 8 1427612 Kuraray northern leased area stormwater discharge11 2,700 2,700 2,700 10---11 220 220 2203 Chemours PPA area stormwater discharge11 2,700 2,700 2,700 10---10---4 Combined stormwater discharge from Kuraray northern leased area and Chemours PPA area11 620 620 620 1112 12 121165 65 655 Kuraray southern leased area stormwater 11 100 100 100 101168 68 68101Chemours Monomers IXM area stormwater discharge11 1,700 1,700 1,700 11 5,300 5,300 5,300 10---11Stormwater discharge from portion of grassy field to north of decommissioned Chemours Teflon area11 320 320 320 1146 46 4611 120 120 1207A Combined stormwater and NCCW discharge from western portion of the Facility997.8 14 200 965.2 10 149915 24 699Chemours Monomers IXM NCCW and stormwater discharge including stormwater from Vinyl Ethers South and Vinyl Ethers North9925 55 3200 985.7 14 390 9818 34 1,00010A Combined Chemours Monomers IXM NCCW and stormwater discharge2256 1,300 2,600 21 13,000 13,000 13,000 20---12 DuPont area southern drainage ditch stormwater discharge and NCCW5515 20 775312 12 205526 52 8313 DuPont area northern drainage ditch stormwater discharge and NCCW11 640 640 640 1150 50 5011 190 190 19014 DuPont area southeast stormwater and NCCW discharge 8812 20 120 848.1 14 258815 34 6815 Combined stormwater and NCCW discharge from eastern portion of the Facility11 11 34 51 3,000 1198.4 15 2,700 11 10 23 35 68021A Sediment Basin South9916 43 420 989.5 14 110 9923 43 18021B3Sediment Basin North---------------8 Outfall 001 treated non-Chemours process wastewater discharge to open channel to Outfall 002 10 10 96 210 500 10988 280 20,000 10838 100 1,00022 WWTP combined influent10827 67 170 10725 56 230 10711 37 1,50023AKuraray northern leased area combined process wastewater and NCCW; open grate on Terracotta pipe12 12 570 870 25,000 12 12 320 1,200 1,800 12633 100 1,3007BCombined stormwater and NCCW discharge from western portion of the Facility and treated discharge from WWTP10 10 16 21 200 10 10 9.8 46 1,100 10 10 19 27 667CCombined stormwater and NCCW discharge from western portion of the Facility, the eastern portion of the Facility, and the DuPont Area, and treated discharge from WWTP2224 240 460 2236 210 380 2263 82 10020 Outfall 002 pipe to Cape Fear River upstream of sump15 15 30 50 940 15 14 13 33 850 15 14 27 33 200162Chemours Monomers IXM Area combined process wastewater ---------------17A2Chemours PPA Area waste acid trailer---------------17B2Chemours PPA Area waste rinse water trailer---------------NotesSample numbers refer to locations identified in Figure 2.The summary statistics and number of samples collected reflect the total number of samples collected throughout the initial characterization period, including field duplicates.HFPO-DA - Hexafluoropropylene oxide dimer acidIXM - ion exchange membraneng/L - nanograms per literNCCW - non-contact cooling waterPFAS - per- and polyfluoroalkyl substances PFMOAA - Perfluoro-2-methoxyacetic acidPMPA - Perfluoromethoxypropyl carboxylic acidPPA - polymer processing aid WWTP - Wastewater treatment plant1 - The summary statistics and number of samples collected for Location 10 reflect the wet weather May/June 2020 event only.2 - Locations 16, 17A, 17B were initially in the sampling program but were removed because they do not reach Outfall 002. Summary statistics were not computed for these locations.3 - Location 21B was not sampled to date because this sediment pond was not in use at the time of sampling.Wastewater Treatment PlantCombined Flows to Outfall 002Chemours Process WastewaterNon-Chemours Process WastewaterNCCWStormwaterStormwater-NCCWPMPA(ng/L)Sample Location DescriptionSample Category Sample Location IDHFPO-DA(ng/L)PFMOAA(ng/L)TR0795ADecember 2020DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE 5SUMMARY STATISTICS FOR TOTAL TABLE 3+ (17 COMPOUNDS), TOTAL TABLE 3+ (20 COMPOUNDS), AND TOTAL EPA METHOD 537Chemours Fayetteville Works, North CarolinaGeosyntec Consultants of NC, P.C.No. of SamplesMinimum Median MaximumNo. of SamplesMinimum Median MaximumNo. of SamplesMinimum Median MaximumIntake River Water at Facility 1Discharge point of excess river water (i.e., water drawn from the Cape Fear River, but not used as process water or NCCW) to characterize background levels of PFAS948 58 120 960 76 150 930 55 19018 Kuraray process wastewater 12 6.432260 12 6.439360 1293212019A DuPont process wastewater, Plant 191849970 91849980 95.9289919B DuPont process wastewater, Plant 294.967510 94.968510 915267423B Kuraray laboratory process wastewater7 110 150 34,000 7 140 170 36,000 733 52 7306A Kuraray southern leased area NCCW discharge - Vacuum Condenser930 81 150 943 100 190 941 60 1906B Kuraray southern leased area NCCW discharge - Resins Area928 67 150 930 85 150 935 54 38024A Chemours Monomers IXM Vinyl Ethers South NCCW15 52 77 280 15 65 92 280 15 31 64 13024B Chemours Monomers IXM Line 3 and Line 4 Extruder NCCW10 36 54 120 10 46 66 130 10 26 51 19024C Chemours Monomers IXM Water Return Header NCCW844 85 2,600 866 140 4,500 824 53 1202 Kuraray northern leased area stormwater discharge1 3,000 3,000 3,000 1 3,100 3,100 3,100 118 18 183 Chemours PPA area stormwater discharge1 2,800 2,800 2,800 1 2,800 2,800 2,800 144 44 444 Combined stormwater discharge from Kuraray northern leased area and Chemours PPA area 1 720 720 720 1 740 740 74019995 Kuraray southern leased area stormwater 1 280 280 280 1 420 420 420 1202020101Chemours Monomers IXM area stormwater discharge1 9,800 9,800 9,800 1 11,000 11,000 11,000 1 130 130 13011Stormwater discharge from portion of grassy field to north of decommissioned Chemours Teflon area1 1,200 1,200 1,200 1 1,600 1,600 1,600 1 130 130 1307A Combined stormwater and NCCW discharge from western portion of the Facility941 60 810 952 73 1,000 931 60 1909Chemours Monomers IXM NCCW and stormwater discharge including stormwater from Vinyl Ethers South and Vinyl Ethers North9 110 300 12,000 9 170 550 16,000 941 63 41010A Combined Chemours Monomers IXM NCCW and stormwater discharge2 370 11,000 21,000 2 750 12,000 24,000 256 160 26012 DuPont area southern drainage ditch stormwater discharge and NCCW565 110 230 580 120 300 575 83 18013 DuPont area northern drainage ditch stormwater discharge and NCCW1 1,300 1,300 1,300 1 1,700 1,700 1,700 184 84 8414 DuPont area southeast stormwater and NCCW discharge 847 86 210 853 90 240 836 98 28015 Combined stormwater and NCCW discharge from eastern portion of the Facility11 140 510 13,000 11 210 1,000 17,000 11 38 100 42021A Sediment Basin South955 170 1,800 959 190 3,000 937 82 18021B2Sediment Basin North------------8Outfall 001 treated non-Chemours process wastewater discharge to open channel to Outfall 00210 560 1,600 31,000 10 930 2,100 36,000 10 32 71 16022 WWTP combined influent10 93 290 4,400 10 390 680 18,000 10 32 74 14023AKuraray northern leased area combined process wastewater and NCCW; open grate on Terracotta pipe12 5,600 15,000 40,000 12 7,800 20,000 48,000 12 110 300 9607BCombined stormwater and NCCW discharge from western portion of the Facility and treated discharge from WWTP10 71 190 1,900 10 120 310 3,200 10 33 92 9607CCombined stormwater and NCCW discharge from western portion of the Facility, the eastern portion of the Facility, and the DuPont Area, and treated discharge from WWTP2 220 1,100 2,000 2 340 1,500 2,600 2 45 78 11020 Outfall 002 pipe to Cape Fear River upstream of sump 15 120 200 4,000 15 180 310 5,300 15 34 60 430163Chemours Monomers IXM Area combined process wastewater ------------17A3Chemours PPA Area waste acid trailer------------17B3Chemours PPA Area waste rinse water trailer------------NotesSample numbers refer to locations identified in Figure 2.The summary statistics and number of samples collected reflect the total number of samples collected throughout the initial characterization period, including field duplicates.Total Table 3+ (17 compounds) concentration includes HFPO-DA results evaluated by EPA Method 537 Mod and does not include R-PSDA, Hydrolyzed PSDA, and R-EVE.Non-detect values were not included in sum of Total Table 3+ results or EPA Method 537 Mod.Total Table 3+ and EPA Method 537 Mod results include J-qualified data.HFPO-DA - Hexafluoropropylene oxide dimer acid Hydrolyzed PSDA - Acetic acid, 2-fluoro-2-[1,1,2,3,3,3-hexafluoro-2-(1,1,2,2-tetrafluoro-2-sulfoethoxy)propoxy]-IXM - ion exchange membraneng/L - nanograms per literNCCW - non-contact cooling waterPFAS - per- and polyfluoroalkyl substances PPA - polymer processing aid R-EVE - Pentanoic acid, 4-(2-carboxy-1,1,2,2-tetrafluoroethoxy)-2,2,3,3,4,5,5,5-octafluoro-R-PSDA - Pentanoic acid, 2,2,3,3,4,5,5,5-octafluoro-4-(1,1,2,2-tetrafluoro-2-sulfoethoxy)-WWTP - Wastewater treatment plant1 - The summary statistics and number of samples collected for Location 10 reflect the wet weather May/June 2020 event only.2 - Location 21B was not sampled to date because this sediment pond was not in use at the time of sampling.3 - Locations 16, 17A, 17B were initially in the sampling program but were removed because they do not reach Outfall 002. Summary staistics were not computed for these locations.Combined Flows to Outfall 002Chemours Process WastewaterNon-Chemours Process WastewaterNCCWStormwaterStormwater-NCCWWastewater Treatment PlantSample CategorySample Location IDTotal Table 3+ (17 Compounds)(ng/L)EPA Method 537 Mod(ng/L)Sample Location DescriptionTotal Table 3+ (20 Compounds)(ng/L)TR0795ADecember 2020DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE 6WILCOXON RANK SUM TEST RESULTS FOR COMPARISON TO LOCATION 1 (INTAKE RIVER WATER AT FACILITY)Chemours Fayetteville Works, North CarolinaGeosyntec Consultants of NC, P.C.Resultp-valueInterpretation1Resultp-valueInterpretation1Intake River Water at Facility 1Discharge point of excess river water (i.e., water drawn from the Cape Fear River, but not used as process water or NCCW) to characterize background levels of PFAS------18 Kuraray process wastewater -2.710.00666Lower-2.420.01531Lower19A DuPont process wastewater, Plant 1-1.10 0.26969Not Different-2.520.01185Lower19B DuPont process wastewater, Plant 2-0.57 0.56599Not Different-2.250.02434Lower23B Kuraray laboratory process wastewater3.130.00175Higher0.320.74939Not Different6A Kuraray southern leased area NCCW discharge - Vacuum Condenser0.930.35384Not Different0.660.50780Not Different6B Kuraray southern leased area NCCW discharge - Resins Area0.040.96478Not Different0.400.69110Not Different24A Chemours Monomers IXM Vinyl Ethers South NCCW1.060.29020Not Different1.600.11029Not Different24B Chemours Monomers IXM Line 3 and Line 4 Extruder NCCW-1.210.22648Not Different-0.600.54535Not Different24C Chemours Monomers IXM Water Return Header NCCW1.050.29362Not Different-0.210.83363Not Different2 Kuraray northern leased area stormwater discharge2.880.00395Higher2-0.960.33667Not Different23 Chemours PPA area stormwater discharge2.880.00395Higher2-0.960.33667Not Different24 Combined stormwater discharge from Kuraray northern leased area and Chemours PPA area2.880.00395Higher2-0.960.33667Not Different25 Kuraray southern leased area stormwater 2.880.00395Higher2-0.960.33667Not Different210 Chemours Monomers IXM area stormwater discharge2.880.00395Higher2-0.960.33667Not Different211 Stormwater discharge from portion of grassy field to north of decommissioned Chemours Teflon area2.880.00395Higher2-0.960.33667Not Different27A Combined stormwater and NCCW discharge from western portion of the Facility0.040.96478Not Different0.620.53650Not Different9Chemours Monomers IXM NCCW and stormwater discharge including stormwater from Vinyl Ethers South and Vinyl Ethers North3.490.00049Higher1.550.12228Not Different10A Combined Chemours Monomers IXM NCCW and stormwater discharge--NA3--NA312 DuPont area southern drainage ditch stormwater discharge and NCCW1.150.25059Not Different1.780.07580Not Different13 DuPont area northern drainage ditch stormwater discharge and NCCW--NA3--NA314 DuPont area southeast stormwater and NCCW discharge 0.740.46225Not Different1.050.29362Not Different15 Combined stormwater and NCCW discharge from eastern portion of the Facility3.970.00007Higher1.670.09404Not Different21A Sediment Basin South2.690.00708Higher0.130.89463Not Different21B Sediment Basin North--NA4--NA48 Outfall 001 treated non-Chemours process wastewater discharge to open channel to Outfall 0023.780.00016Higher0.600.54535Not Different22 WWTP combined influent3.330.00088Higher-0.450.65015Not Different23AKuraray northern leased area combined process wastewater and NCCW; open grate on Terracotta pipe4.160.00003Higher4.040.00005Not Different7BCombined stormwater and NCCW discharge from western portion of the Facility and treated discharge from WWTP3.100.00194Higher0.910.36435Not Different7CCombined stormwater and NCCW discharge from western portion of the Facility, the eastern portion of the Facility, and the DuPont Area, and treated discharge from WWTP--NA3--NA320 Outfall 002 pipe to Cape Fear River upstream of sump4.670.00000Higher1.270.20584Not Different16 Chemours Monomers IXM Area combined process wastewater --NA5NA517A Chemours PPA Area waste acid trailer--NA5NA517B Chemours PPA Area waste rinse water trailer--NA5NA5NotesSample numbers refer to locations identified in Figure 2.The Wilcoxon Rank Sum test was used to compare whether the total Table 3+ concentrations and EPA Method 537 Mod concentrations in samples collected at the subject location were higher or lower than concentrations in the samples collected at Location 1. Total Table 3+ concentration includes HFPO-DA results evaluated by EPA Method 537 Mod and does not include R-PSDA, Hydrolyzed PSDA, and R-EVE.Non-detect values were not included in the sum of Total Table 3+ results or EPA Method 537 Mod.Total Table 3+ and EPA Method 537 Mod results include J-qualified data.HFPO-DA - Hexafluoropropylene oxide dimer acid Hydrolyzed PSDA - Acetic acid, 2-fluoro-2-[1,1,2,3,3,3-hexafluoro-2-(1,1,2,2-tetrafluoro-2-sulfoethoxy)propoxy]-IXM - ion exchange membraneng/L - nanograms per literNCCW - non-contact cooling waterPFAS - per- and polyfluoroalkyl substances PPA - polymer processing aid R-EVE - Pentanoic acid, 4-(2-carboxy-1,1,2,2-tetrafluoroethoxy)-2,2,3,3,4,5,5,5-octafluoro-R-PSDA - Pentanoic acid, 2,2,3,3,4,5,5,5-octafluoro-4-(1,1,2,2-tetrafluoro-2-sulfoethoxy)-WWTP - Wastewater treatment plant1 - Higher: Concentrations at this location are significantly higher than Location 1 (Intake River Water at Facility) Lower: Concentrations at this location are significantly lower than Location 1 (Intake River Water at Facility) Not Different: Concentrations at this location are not signficantly different than Location 1 (Intake River Water at Facility)2 - Because the stormwater locations only had results from one (1) sampling event (May/June 2020), results from all stormwater locations were grouped into one dataset and compared to concentrations at Location 1.3 - There were not enough samples at this location for comparison to Location 1 (Intake River Water at Facility)4 - Location 21B was not sampled to date because this sediment pond was not in use at the time of sampling.5 - Locations 16, 17A, 17B were initially in the sampling program but were removed because they do not reach Outfall 002. Comparison to Location 1 was not analyzed for these locations.Combined Flows to Outfall 002Chemours Process WastewaterNon-Chemours Process WastewaterNCCWStormwaterStormwater-NCCWWastewater Treatment PlantSample CategorySample Location IDSample Location DescriptionTotal Table 3+(ng/L)EPA Method 537 Mod(ng/L)TR0795ADecember 2020DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
FIGURES
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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
1,000 0 1,000500 Feet
³Path: P:\PRJ\Projects\TR0795\Database and GIS\GIS\Baseline Monitoring Workplan\TR0795_SiteLocation.mxd Last Revised: 10/8/2020 Author: TIpOctober 2020
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
Legend
")Site Features
Site Boundary
Nearby Tributary
Observed Seep (Natural Drainage)
Site Conveyance Network
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 WaterProductionKuraray Laboratory
Projection: NAD 1983 StatePlane North Carolina FIPS 3200 Feet; Units in Foot US
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Paragraph 11(b) Sample Locations
Chemours Fayetteville Works, North Carolina
Figure
2Raleigh
500 0 500250 Feet
³Path: P:\PRJ\Projects\TR0795\Database and GIS\GIS\Wastewater and Stormwater Quarterly Report\TR0795_Para11b_Locations_2020_F2.mxd Last Revised: 12/1/2020 Author: JKasunicDecember 2020
Projection: WGS 1984 Web Mercator Auxiliary Sphere; Units in Meter
Notes:1. Intake River Water at Facility sample location represents background concentrationsof PFAS.2. Non-Chemours Process Wastewater sample locations represent process wastewaterfrom non-Chemours manufacturing areas.3. Non-Contact Cooling Water (NCCW) sample locations represent non-processwastewater from Kuraray and Chemours manufacturing areas.4. Stormwater sample locations represent stormwater only.5. Stormwater-NCCW sample locations represent both stormwater and non-processwastewater from throughout the Facility.6. Wastewater Treatment Plant sample locations represent process wastewater from non-Chemours manufacturing areas and non-process wastewater from throughout the Facility.7. Combined Flows to Outfall 002 represent process wastewater, non-processwastewater, and stormwater from throughout the Facility.8. Basemap Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/AirbusDS, USDA, USGS, AeroGRID, IGN, and the GIS User Community.
Ditch Type
Wood Lined Trench
Cooling Water Channel
Open Channel to Outfall 002
Other Connections
Pipe Connection to Facility
Wastewater Treatment Plant Discharge
DuPont Area
Grouted Pipe Section
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Non-Chemours Process Wastewater
Intake River Water at Facility
Non-Contact Cooling Water (NCCW)
Stormwater
Combined Flows to Outfall 002
Wastewater Treatment Plant
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HFPO-DA, PFMOAA, and PMPA Summary Statistics – Locations that Reach Outfall 002 – All Events
Chemours Fayetteville Works, North Carolina
Figure
3ARaleigh
500 0 500250 Feet
³Path: P:\PRJ\Projects\TR0795\Database and GIS\GIS\Wastewater and Stormwater Quarterly Report\TR0795_Para11b_Locations_2020_F2.mxd Last Revised: 12/1/2020 Author: JKasunicDecember 2020
Projection: WGS 1984 Web Mercator Auxiliary Sphere; Units in Meter
Ditch Type
Wood Lined Trench
Cooling Water Channel
Open Channel to Outfall 002
Other Connections
Pipe Connection to Facility
Wastewater Treatment Plant Discharge
DuPont Area
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Legend
!(Temporal Composite Sample
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Sample Location Category
Non-Chemours Process Wastewater
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Stormwater
Combined Flows to Outfall 002
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"P:\PRJ\Projects\TR0795\Database and GIS\Illustrator\Wastewater and Stormwater Quarterly Report\TR0795_Para11b_Locations_2020_F2.ai"HFPO-DA PFMOAA PMPA
No. of Samples 9 9 9
No. of Detects 9 6 9
Minimum (ng/L)9.8 5 17
Median (ng/L)13 9.8 26
Maximum (ng/L)30 25 60
HFPO-DA PFMOAA PMPA
No. of Samples 1 1 1
No. of Detects 1 0 1
Minimum (ng/L)2700 ND 220
Median (ng/L)2700 ND 220
Maximum (ng/L)2700 ND 220
HFPO-DA PFMOAA PMPA
No. of Samples 1 1 1
No. of Detects 1 0 0
Minimum (ng/L)2700 ND ND
Median (ng/L)2700 ND ND
Maximum (ng/L)2700 ND ND
HFPO-DA PFMOAA PMPA
No. of Samples 1 1 1
No. of Detects 1 1 1
Minimum (ng/L)620 12 65
Median (ng/L)620 12 65
Maximum (ng/L)620 12 65
HFPO-DA PFMOAA PMPA
No. of Samples 1 1 1
No. of Detects 1 0 1
Minimum (ng/L)100 ND 68
Median (ng/L)100 ND 68
Maximum (ng/L)100 ND 68
HFPO-DA PFMOAA PMPA
No. of Samples 9 9 9
No. of Detects 9 4 9
Minimum (ng/L)6.7 9.9 14
Median (ng/L)19 13 30
Maximum (ng/L)66 24 80
HFPO-DA PFMOAA PMPA
No. of Samples 9 9 9
No. of Detects 9 4 9
Minimum (ng/L)4.5 8.9 17
Median (ng/L)17 11 26
Maximum (ng/L)41 31 53
HFPO-DA PFMOAA PMPA
No. of Samples 9 9 9
No. of Detects 9 6 9
Minimum (ng/L)7.8 5.2 15
Median (ng/L)14 10 24
Maximum (ng/L)200 14 69
HFPO-DA PFMOAA PMPA
No. of Samples 10 10 10
No. of Detects 10 10 10
Minimum (ng/L)16 9.8 19
Median (ng/L)21 46 27
Maximum (ng/L)200 1100 66
HFPO-DA PFMOAA PMPA
No. of Samples 2 2 2
No. of Detects 2 2 2
Minimum (ng/L)24 36 63
Median (ng/L)240 210 82
Maximum (ng/L)460 380 100
HFPO-DA PFMOAA PMPA
No. of Samples 10 10 10
No. of Detects 10 9 8
Minimum (ng/L)96 88 38
Median (ng/L)210 280 100
Maximum (ng/L)500 20000 1000
HFPO-DA PFMOAA PMPA
No. of Samples 9 9 9
No. of Detects 9 8 8
Minimum (ng/L)25 5.7 18
Median (ng/L)55 14 34
Maximum (ng/L)3200 390 1000
HFPO-DA PFMOAA PMPA
No. of Samples 1 1 1
No. of Detects 1 1 0
Minimum (ng/L)1700 5300 ND
Median (ng/L)1700 5300 ND
Maximum (ng/L)1700 5300 ND
HFPO-DA PFMOAA PMPA
No. of Samples 2 2 2
No. of Detects 2 1 0
Minimum (ng/L)56 13000 ND
Median (ng/L)1300 13000 ND
Maximum (ng/L)2600 13000 ND
HFPO-DA PFMOAA PMPA
No. of Samples 1 1 1
No. of Detects 1 1 1
Minimum (ng/L)320 46 120
Median (ng/L)320 46 120
Maximum (ng/L)320 46 120
HFPO-DA PFMOAA PMPA
No. of Samples 5 5 5
No. of Detects 5 3 5
Minimum (ng/L)15 12 26
Median (ng/L)20 12 52
Maximum (ng/L)77 20 83
HFPO-DA PFMOAA PMPA
No. of Samples 1 1 1
No. of Detects 1 1 1
Minimum (ng/L)640 50 190
Median (ng/L)640 50 190
Maximum (ng/L)640 50 190
HFPO-DA PFMOAA PMPA
No. of Samples 8 8 8
No. of Detects 8 4 8
Minimum (ng/L)12 8.1 15
Median (ng/L)20 14 34
Maximum (ng/L)120 25 68
HFPO-DA PFMOAA PMPA
No. of Samples 11 11 11
No. of Detects 11 9 10
Minimum (ng/L)34 8.4 23
Median (ng/L)51 15 35
Maximum (ng/L)3000 2700 680
HFPO-DA PFMOAA PMPA
No. of Samples 12 12 12
No. of Detects 12 0 6
Minimum (ng/L)3.6 ND 15
Median (ng/L)8.6 ND 20
Maximum (ng/L)120 ND 64
HFPO-DA PFMOAA PMPA
No. of Samples 9 9 9
No. of Detects 9 3 7
Minimum (ng/L)4.2 5.5 13
Median (ng/L)18 8.7 27
Maximum (ng/L)380 16 340
HFPO-DA PFMOAA PMPA
No. of Samples 9 9 9
No. of Detects 9 3 6
Minimum (ng/L)2.2 5.6 12
Median (ng/L)22 14 38
Maximum (ng/L)75 37 120
HFPO-DA PFMOAA PMPA
No. of Samples 15 15 15
No. of Detects 15 14 14
Minimum (ng/L)30 13 27
Median (ng/L)50 33 33
Maximum (ng/L)940 850 200
HFPO-DA PFMOAA PMPA
No. of Samples 9 9 9
No. of Detects 9 8 9
Minimum (ng/L)16 9.5 23
Median (ng/L)43 14 43
Maximum (ng/L)420 110 180
HFPO-DA PFMOAA PMPA
No. of Samples 10 10 10
No. of Detects 10 7 7
Minimum (ng/L)27 25 11
Median (ng/L)67 56 37
Maximum (ng/L)170 230 1500
HFPO-DA PFMOAA PMPA
No. of Samples 12 12 12
No. of Detects 12 12 6
Minimum (ng/L)69 320 33
Median (ng/L)570 1200 100
Maximum (ng/L)25000 1800 1300
HFPO-DA PFMOAA PMPA
No. of Samples 7 7 7
No. of Detects 7 6 6
Minimum (ng/L)17 3.7 24
Median (ng/L)35 16 32
Maximum (ng/L)3200 200 21000
HFPO-DA PFMOAA PMPA
No. of Samples 15 15 15
No. of Detects 15 10 15
Minimum (ng/L)8.7 6.9 21
Median (ng/L)17 10 28
Maximum (ng/L)38 18 96
HFPO-DA PFMOAA PMPA
No. of Samples 10 10 10
No. of Detects 10 6 10
Minimum (ng/L)4.7 3.2 16
Median (ng/L)11 12 23
Maximum (ng/L)16 15 33
HFPO-DA PFMOAA PMPA
No. of Samples 8 8 8
No. of Detects 8 5 8
Minimum (ng/L)5.6 3 14
Median (ng/L)15 10 27
Maximum (ng/L)270 15 61
Notes:ND - non detectng/L - nanograms per literHFPO-DA - Hexafluoropropylene oxide dimer acidPFMOAA - Perfluoro-2-methoxyacetic acidPMPA - Perfluoromethoxypropyl carboxylic acid1. See text for sample collection dates.2. All concentrations are in ng/L.3. Temporal composite samples were collected over a 4 hour interval.4. Summary statistics (minimum, median, maximum) presented for detected concentrations only.5. Location 10 summary statistics presented for May/June 2020 event only. "P:\PRJ\Projects\TR0795\Database and GIS\Illustrator\Wastewater and Stormwater Quarterly Report\Fig 3A TR0795_Para11b_Locations_2020Q3.ai"DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
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Total Table 3+ and Total EPA Method 537 Mod Summary Statistics – Locations that
Reach Outfall 002 – All Events
Chemours Fayetteville Works, North Carolina
Figure
3BRaleigh
500 0 500250 Feet
³Path: P:\PRJ\Projects\TR0795\Database and GIS\GIS\Wastewater and Stormwater Quarterly Report\TR0795_Para11b_Locations_2020_F2.mxd Last Revised: 12/1/2020 Author: JKasunicDecember 2020
Projection: WGS 1984 Web Mercator Auxiliary Sphere; Units in Meter
Ditch Type
Wood Lined Trench
Cooling Water Channel
Open Channel to Outfall 002
Other Connections
Pipe Connection to Facility
Wastewater Treatment Plant Discharge
DuPont Area
Grouted Pipe Section
Terracotta Pipe and Piping Connected to Terracotta Pipe
Legend
!(Temporal Composite Sample
")Grab Sample
Sample Location Category
Non-Chemours Process Wastewater
Intake River Water at Facility
Non-Contact Cooling Water (NCCW)
Stormwater
Combined Flows to Outfall 002
Wastewater Treatment Plant
Stormwater-NCCW
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Total Table 3+Total EPA Method 537 Mod
9 9No. of Samples
Minimum (ng/L)48 30
Median (ng/L)58 55
Maximum (ng/L)120 190
Total Table 3+Total EPA Method 537 Mod
1 1No. of Samples
Minimum (ng/L)3000 18
Median (ng/L)3000 18
Maximum (ng/L)3000 18
Total Table 3+Total EPA Method 537 Mod
1 1No. of Samples
Minimum (ng/L)2800 44
Median (ng/L)2800 44
Maximum (ng/L)2800 44
Total Table 3+Total EPA Method 537 Mod
1 1No. of Samples
Minimum (ng/L)720 9
Median (ng/L)720 9
Maximum (ng/L)720 9
Total Table 3+Total EPA Method 537 Mod
1 1No. of Samples
Minimum (ng/L)280 20
Median (ng/L)280 20
Maximum (ng/L)280 20
Total Table 3+Total EPA Method 537 Mod
9 9No. of Samples
Minimum (ng/L)30 41
Median (ng/L)81 60
Maximum (ng/L)150 190
Total Table 3+Total EPA Method 537 Mod
9 9No. of Samples
Minimum (ng/L)28 35
Median (ng/L)67 54
Maximum (ng/L)150 380
Total Table 3+Total EPA Method 537 Mod
9 9No. of Samples
Minimum (ng/L)41 31
Median (ng/L)60 60
Maximum (ng/L)810 190
Total Table 3+Total EPA Method 537 Mod
10 10No. of Samples
Minimum (ng/L)71 33
Median (ng/L)190 92
Maximum (ng/L)1900 960
Total Table 3+Total EPA Method 537 Mod
2 2No. of Samples
Minimum (ng/L)220 45
Median (ng/L)1100 78
Maximum (ng/L)2000 110
Total Table 3+Total EPA Method 537 Mod
10 10No. of Samples
Minimum (ng/L)560 32
Median (ng/L)1600 71
Maximum (ng/L)31000 160
Total Table 3+Total EPA Method 537 Mod
9 9No. of Samples
Minimum (ng/L)110 41
Median (ng/L)300 63
Maximum (ng/L)12000 410
Total Table 3+Total EPA Method 537 Mod
6 1No. of Samples
Minimum (ng/L)480 130
Median (ng/L)7100 130
Maximum (ng/L)61000 130
Total Table 3+Total EPA Method 537 Mod
2 2No. of Samples
Minimum (ng/L)370 56
Median (ng/L)11000 160
Maximum (ng/L)21000 260
Total Table 3+Total EPA Method 537 Mod
1 1No. of Samples
Minimum (ng/L)1200 130
Median (ng/L)1200 130
Maximum (ng/L)1200 130
Total Table 3+Total EPA Method 537 Mod
5 5No. of Samples
Minimum (ng/L)65 75
Median (ng/L)110 83
Maximum (ng/L)230 180
Total Table 3+Total EPA Method 537 Mod
1 1No. of Samples
Minimum (ng/L)1300 84
Median (ng/L)1300 84
Maximum (ng/L)1300 84
Total Table 3+Total EPA Method 537 Mod
8 8No. of Samples
Minimum (ng/L)47 36
Median (ng/L)86 98
Maximum (ng/L)210 280
Total Table 3+Total EPA Method 537 Mod
11 11No. of Samples
Minimum (ng/L)140 38
Median (ng/L)510 100
Maximum (ng/L)13000 420
Total Table 3+Total EPA Method 537 Mod
12 12No. of Samples
Minimum (ng/L)6.4 9
Median (ng/L)32 32
Maximum (ng/L)260 120
Total Table 3+Total EPA Method 537 Mod
9 9No. of Samples
Minimum (ng/L)18 5.9
Median (ng/L)49 28
Maximum (ng/L)970 99
Total Table 3+Total EPA Method 537 Mod
9 9No. of Samples
Minimum (ng/L)4.9 15
Median (ng/L)67 26
Maximum (ng/L)510 74
Total Table 3+Total EPA Method 537 Mod
15 15No. of Samples
Minimum (ng/L)120 34
Median (ng/L)200 60
Maximum (ng/L)4000 430
Total Table 3+Total EPA Method 537 Mod
9 9No. of Samples
Minimum (ng/L)55 37
Median (ng/L)170 82
Maximum (ng/L)1800 180
Total Table 3+Total EPA Method 537 Mod
10 10No. of Samples
Minimum (ng/L)93 32
Median (ng/L)290 74
Maximum (ng/L)4400 140
Total Table 3+Total EPA Method 537 Mod
11 12No. of Samples
Minimum (ng/L)5600 110
Median (ng/L)18000 300
Maximum (ng/L)40000 960
Total Table 3+Total EPA Method 537 Mod
7 7No. of Samples
Minimum (ng/L)110 33
Median (ng/L)150 52
Maximum (ng/L)34000 730
Total Table 3+Total EPA Method 537 Mod
15 15No. of Samples
Minimum (ng/L)52 31
Median (ng/L)77 64
Maximum (ng/L)280 130
Total Table 3+Total EPA Method 537 Mod
10 10No. of Samples
Minimum (ng/L)36 26
Median (ng/L)54 51
Maximum (ng/L)120 190
Total Table 3+Total EPA Method 537 Mod
8 8No. of Samples
Minimum (ng/L)44 24
Median (ng/L)85 53
Maximum (ng/L)2600 120
"P:\PRJ\Projects\TR0795\Database and GIS\Illustrator\Wastewater and Stormwater Quarterly Report\Fig 3B TR0795_Para11b_Locations_2020Q3.ai"Notes:ng/L - nanograms per literHFPO-DA - Hexafluoropropylene oxide dimer acidHydrolyzed PSDA - Acetic acid, 2-fluoro-2-[1,1,2,3,3,3-hexafluoro-2-(1,1,2,2-tetrafluoro-2-sulfoethoxy)propoxy]-R-EVE - Pentanoic acid, 4-(2-carboxy-1,1,2,2-tetrafluoroethoxy)-2,2,3,3,4,5,5,5-octafluoro- R-PSDA - Pentanoic acid, 2,2,3,3,4,5,5,5-octafluoro-4-(1,1,2,2-tetrafluoro-2-sulfoethoxy)-1. See text for sample collection dates.2. All concentrations are in ng/L.3. Temporal composite samples were collected over a 4 hour interval.4. Total Table 3+ concentration includes HFPO-DA results evaluated by EPA Method 537 Mod and does not include R-PSDA, Hydrolyzed PSDA, and R-EVE.5. Non-detect values were not included in sum of Total Table 3+ results or Total EPA Method 537 Mod.6. Total Table 3+ and EPA Method 537 Mod results include J-qualified data.7. Location 10 summary statistics presented for May/June 2020 event only.
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Total Table 3+ Concentrations
Non-Chemours Process Wastewater
Chemours Fayetteville Works, North Carolina
Figure
4A
Raleigh December 2020
1
10
100
1,000
10,000
100,000
Location 1 Location 18 Location 19A Location 19B Location 23BTotal Table 3+ Concentration (ng/L)April 2019 June 2019 August 2019 October 2019 December 2019 January 2020 April 2020 May/June 2020 August 2020
Notes:
1. ng/L -nanograms per liter
2. Total Table 3+ 17 compoundsums presented.
3. Location 1 represents background concentrations. Other locations represent process wastewater from non-Chemours manufacturing areas. See Figure 2 for sample locations.Location 1 -Intake River Water at FacilityLocation 18 -Kuraray process wastewater Location 19A -DuPont process wastewater, Plant 1Location 19B -DuPont process wastewater, Plant 2Location 23B -Kuraray laboratory process wastewater
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Total Table 3+ Concentrations
Non-Contact Cooling Water
Chemours Fayetteville Works, North Carolina
Figure
4B
Raleigh December 2020
1
10
100
1,000
10,000
100,000
Location 1 Location 6A Location 6B Location 24A Location 24B Location 24CTotal Table 3+ Concentration (ng/L)April 2019 June 2019 August 2019 October 2019 December 2019 January 2020 April 2020 May/June 2020 August 2020
Notes:1. ng/L -nanograms per liter2. Total Table 3+ 17 compound sums presented.
3. Location 1 represents background concentrations. Other locations represent non-process wastewater from Kuraray and
Chemours manufacturing areas. See Figure 2 for sample locations.
Location 1 -Intake River Water at Facility
Location 6A -Kuraray southern leased area non-process wastewater discharge -Vacuum Condenser
Location 6B -Kuraray southern leased area non-process wastewater discharge -Resins AreaLocation 24A -Chemours Monomers Ion Exchange Materials (IXM) Vinyl Ethers South non-process wastewaterLocation 24B -Chemours Monomers IXM Line 3 and Line 4 Extruder non-process wastewaterLocation 24C -Chemours Monomers IXM Water Return Header non-process wastewater
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Total Table 3+ Concentrations
Stormwater
Chemours Fayetteville Works, North Carolina
Figure
4C
Raleigh December 2020
1
10
100
1,000
10,000
100,000
May/June 2020Total Table 3+ Concentration (ng/L)Location 1 Location 2 Location 3 Location 4 Location 5 Location 10 Location 11
Notes:1. ng/L -nanograms per liter2. Total Table 3+ 17 compound sums presented.3. Location 1 represents background concentrations. Other locations represent stormwater only. See Figure 2 for sample locations.Location 1 -Intake River Water at Facility
Location 2 -Kuraray southern leased area stormwater
Location 3 -Chemours Polymer Processing Aid (PPA) area stormwater discharge
Location 4 -Combined stormwater from Kuraray norhtern leased area and Chemours PPA area
Location 5 -Kuraray southern leased area stormwater
Location 10 -Chemours Monomers Ion Exchange Materials (IXM) area storwater dischargeLocation 11 -Stormwater discharge from portion of grassy field to north of decommissioned Chemours Teflon area
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Total Table 3+ Concentrations
Stormwater-Non-Contact Cooling WaterChemours Fayetteville Works, North Carolina
Figure
4D
Raleigh December 2020
1
10
100
1,000
10,000
100,000
Location 1 Location 7A Location 9 Location 10A Location 12 Location 13 Location 14 Location 15 Location 21ATotal Table 3+ Concentration (ng/L)April 2019 June 2019 August 2019 October 2019 December 2019 January 2020 April 2020 May/June 2020 August 2020
Notes:1. ng/L -nanograms per liter2. Total Table 3+ 17 compound sums presented.3. Location 1 represents background concentrations. Other locations represent both stormwater and non-process wastewater from throughout theFacility. See Figure 2 for sample locations.
Location 1 -Intake River Water at Facility
Location 7A -Combined stormwater and non-process wastewater discharge from western portion of the Facility
Location 9 -Combined non-process wastewater from Chemours Monomers Ion Exchange Materials (IXM) area and stormwater discharge from Vinyl
Ethers South and Vinyl Ethers North
Location 10A -Combined Chemours Monomers IXM non-process wastewater and stormwater discharge
Location 12 -DuPont area southern drainage ditch stormwater discharge and NCCWLocation 13 -DuPont area northern drainage ditch stormwater discharge and NCCWLocation 14 -DuPont area southeast stormwater and NCCW discharge Location 15 -Combined stormwater and NCCW discharge from eastern portion of the FacilityLocation 21A -Sediment Basin South
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Total Table 3+ Concentrations
Wastewater Treatment PlantChemours Fayetteville Works, North Carolina
Figure
4E
Raleigh December 2020
1
10
100
1,000
10,000
100,000
Location 1 Location 8 Location 22 Location 23ATotal Table 3+ Concentration (ng/L)April 2019 June 2019 August 2019 October 2019 December 2019 January 2020 April 2020 May/June 2020 August 2020
Notes:1. ng/L -nanograms per liter2. Total Table 3+ 17 compound sums presented.3. Location 1 represents background concentrations. Other locations represent process wastewater from non-Chemours
manufacturing areas and non-process wastewater from throughout the Facility. See Figure 2 for sample locations.
4. May/June 2020 value for Location 8 based on sample collected during dry weather in June 2020.
Location 1 -Intake River Water at Facility
Location 8 -Wastewater Treatment Plant (WWTP) Effluent
Locaton 22 -WWTP Influent
Location 23A -Terracotta Pipe
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Total Table 3+ Concentrations
Combined Flows to Outfall 002Chemours Fayetteville Works, North Carolina
Figure
4F
Raleigh December 2020
1
10
100
1,000
10,000
100,000
Location 1 Location 7B Location 7C Location 20Total Table 3+ Concentration (ng/L)April 2019 June 2019 August 2019 October 2019 December 2019 January 2020 April 2020 May/June 2020 August 2020
Notes:1. ng/L -nanograms per liter2. Total Table 3+ 17 compound sums presented.3. Location 1 represents background concentrations. Other locations represent process wastewater, non-process wastewater, and stormwater from throughout the Facility. See Figure 2 for sample locations.Location 1 -Intake River Water at Facility
Location 7B -Combined stormwater and non-process wastewater from western portion of the Facility and treated discharge from
the wastewater treatment plant (WWTP)
Location 7C -Combined stormwater and non-process wastewater from western portion of the Facility, the eastern portion of the
Facility, and the DuPont Area, and treated discharge from WWTP
Location 20 -Outfall 002
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Total Table 3+ Concentrations
Chemours Fayetteville Works, North Carolina
Figure
5A
Raleigh December 2020
Notes:
1.ng/L -nanograms per liter2. Total Table 3+ 17 compound sums presented.
3. The data presented includes all samples, including field duplicates.
4.Location 10 data presented for May/June 2020 event only.
Intake River Water at Facility Stormwater-Non-Contact Cooling Water LocationsNon-Chemours Process Wastewater Locations Wastewater Treatment Plant Locations
Non-Contact Cooling Water Locations Combined Flows to Outfall 002 Locations
Stormwater Locations
1
10
100
1,000
10,000
100,000
Total Table 3+ Concentration (ng/L)Location
1 18 19A 19B 23B 6A 6B 24A 24B 24C 2 3 4 5 10 11 7A 9 10A 12 13 14 15 21A 8 22 23A 7B 7C 20
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
EPA Method 537 Mod Concentrations
Chemours Fayetteville Works, North Carolina
Figure
5B
Raleigh December 2020
Intake River Water at Facility Stormwater-Non-Contact Cooling Water Locations
Non-Chemours Process Wastewater Locations Wastewater Treatment Plant Locations
Non-Contact Cooling Water Locations Combined Flows to Outfall 002 Locations
Stormwater Locations
Notes:
1.ng/L -nanograms per liter
2. Total Table 3+ 17 compound sums presented.
3. The data presented includes all samples, including field duplicates.
4.Location 10 data presented for May/June 2020 event only.
1
10
100
1,000
EPA Method 537 Mod Concentration (ng/L)Location
1 18 19A 19B 23B 6A 6B 24A 24B 24C 2 3 4 5 10 11 7A 9 10A 12 13 14 15 21A 8 22 23A 7B 7C 20
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Wastewater Treatment Plant Discharge DuPon t Area
Op en C ha nn el to Ou tfa ll 002
Stormw ater Channel
(dra ins to Cap e Fear River)WoodLinedTrenchWoodLinedTrench21A
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7A
8 11
12
13
14
15
20
7B
7C
9A
Paragraph 11(d) Sample Locations
Chemours Fayetteville Works, North Carolina
Figure
6Raleigh
500 0 500250 Feet
³Path: P:\PRJ\Projects\TR0795\Database and GIS\GIS\Wastewater and Stormwater Quarterly Report\TR0795_Para11b_Locations_AfterJune2021_Fig7.mxd Last Revised: 12/3/2020 Author: JKasunicDecember 2020
Projection: WGS 1984 Web Mercator Auxiliary Sphere; Units in Meter
Legend
!(Temporal Composite Sample
")Grab Sample
Sample Location Category
Ditch Type
Wood Lined Trench
Open Channel to Outfall 002
Other Connections
Pipe Connection to Facility
Wastewater Treatment Plant Discharge
DuPont Area
Terracotta Pipe and Piping Connected to Terracotta Pipe
Stormwater Channel
Combined Stormwater and Non-Contact Cooling Water Pipe
Non-Contact Cooling Water Pipe
Other Features
Proposed Stormwater Treatment System (See Note)
Note:Preferred location of proposed stormwater treatment system is displayed.Exact location is subject to change.Stormwater treatment system will be sampled up to twice per monthunder a separate program.
Grouted Pipe Section
Non-Chemours Process Wastewater
Intake River Water at Facility
Non-Contact Cooling Water (NCCW)
Stormwater
Combined Flows to Outfall 002
Wastewater Treatment Plant
Stormwater-NCCW
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APPENDIX A
2020 Quarter 3 Paragraph 11(c) Scope
Methods and Results

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Appendix A
1 December 2020
APPENDIX A
2020 Quarter 3 Methods and Results
INTRODUCTION
Pursuant to Paragraph 11(c) in the executed Consent Order entered February 25, 2019 amongst
Chemours, the North Carolina Department of Environmental Quality (DEQ), and Cape Fear River
Watch, this appendix summarizes the ninth and final bimonthly sampling event in the 18-month
initial characterization period. The objective of Paragraph 11(c) is to characterize the
concentrations of per- and polyfluoroalkyl substances (“PFAS”) in process wastewater, non-
process wastewater, stormwater, and the raw water intake at the Chemours Fayetteville Works,
North Carolina site (the Facility, Figure 1).
The activity period for this appendix includes 2020 Quarter 3 (July, August, September). In this
quarter, process wastewater and non-process wastewater samples were collected for the ninth and
final bimonthly sampling event in the 18-month initial characterization period. Samples were
collected during dry weather on August 26, 2020 (the August 2020 event), as outlined in the PFAS
Characterization Sampling Plan (Geosyntec, 2019a), with adjustments made based on
recommendations in prior reports (Geosyntec 2019a, 2019b, 2019c, 2020a, 2020b, and 2020c).
Results from the investigative samples in the August 2020 event are included in this appendix.
METHODS
This section describes the methods implemented for data reported in this 2020 Quarter 3 appendix.
Sample Locations
Sample locations outlined in the PFAS Characterization Sampling Plan (Geosyntec, 2019a) are
described in Table 1 and shown in Figure 2 of the main body of the report. Sample locations that
have been added to the Sampling Plan based on recommendations made in previous reports are
also identified in Table 1 and shown in Figure 2.
In the August 2020 event, investigative samples were collected from twenty-three (23) locations
listed in Table 2. Locations 2, 3, 4, 5, 10, 11, 12, and 13 were not sampled for the August 2020
event as there was insufficient water at these locations because the event occurred during a dry
period.
During each sampling event, either Location 21A or 21B (the south and north sediment ponds) is
sampled depending on which sediment pond is active. Consistent with previous sampling events,
the south sediment pond (Location 21A) was active during the August 2020 event and a sample
was collected from this pond.
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Appendix A
2 December 2020
Field Methods
General Field Methods
All equipment was inspected by the field program supervisor and calibrated daily prior to use in
the field, according to the manufacturer’s recommendations. Field parameters were measured with
a water quality meter prior to sample collection and then recorded. Field parameters include the
following:
• pH;
• Temperature (degrees Celsius; °C);
• Specific conductance [SC] (micromhos, μmho);
• Dissolved oxygen [DO] (milligrams per liter; mg/L);
• Oxidation/Reduction Potential [ORP] (millivolts; mV);
• Turbidity (nephelometric turbidity units, NTU);
• Color; and
• Odor.
Samples were collected in 250 milliliter (mL) high density polyethylene (HDPE) bottles with a
wide-mouth screw-cap. Sample bottles were filled and caps were securely fastened after sample
collection. Each sample was labelled with a unique sample identification number, date, time and
location of sampling, and the initials of the individual collecting the sample. A field notebook and
location-specific field forms were used to record information regarding additional items such as
quality assurance/ quality control (QA/QC), sample identifications, color, odor, turbidity, and
other field parameters.
Decontamination Methods
Sample containers were new and used only once for each sample. Disposable equipment (e.g.,
gloves, tubing, etc.) was not reused; these items did not require decontamination.
All non-dedicated or non-disposable sampling equipment (i.e., the autosampler reservoir and dip
rod) was decontaminated immediately before sample collection in the following manner:
• De-ionized water rinse;
• Scrub with de-ionized water containing non-phosphate detergent (i.e., Alconox®); and
• De-ionized water rinse.
If there was a delay between decontamination and sample collection, decontaminated sampling
equipment was covered with PFAS-free plastic until it was ready for use.
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Appendix A
3 December 2020
Grab Sampling Methods
Grab samples were collected from locations where temporal variability over the course of one day
was not expected. These locations include non-process wastewater only locations (Locations 6A,
6B, 24A, 24B, and 24C), select process wastewater only locations (Locations 19A and 19B), and
the Sediment Basin South location (Location 21A), as identified in Table 2 and shown on Figure
2 of the main body of the report. All grab samples were collected by directly filling the HDPE
bottle with the sample. Prior to grab sample collection, field parameters were measured using a
flow through cell for all grab sample locations.
Temporal Composite Sampling Methods
Temporal composite samples were collected during the bimonthly sampling events from locations
where variability was expected to potentially be significant within a short time frame (e.g., one
day). These locations, identified in Table 2 and shown on Figure 2 of the main body of the report,
include those within the Facility conveyance network and the intake and outfall locations, since
these locations can have highly variable dissolved and suspended constituent loads over short time
periods. Temporal composite samples were collected using a dedicated Teledyne 6712C
autosampler equipped with a rain gauge, HDPE tubing, silicon tubing, and an HDPE sample
reservoir. Field parameters were measured once during composite sampling (collected directly
from the water stream). During the sampling event, autosamplers generally integrated water over
a four-hour sample collection period.
Sample Shipping, Chain of Custody, and Holding Times
Upon sample collection, each labelled, containerized sample was placed into a plastic bag inside
an insulated sample cooler with ice. Prior to shipment of the samples to the laboratory, a chain of
custody (COC) form was completed by the field sample custodian. Sample locations, sample
identification numbers, description of samples, number of samples collected, and specific
laboratory analyses to be performed on the samples were recorded on the COC form. COCs were
signed by the field personnel relinquishing the samples to the courier and was signed by the
laboratory upon receipt of the cooler.
Field QA/QC Samples
The following field QA/QC samples were collected and analyzed along with the August 2020
investigative samples:
• Two blind field duplicates;
• Three equipment blanks for the dip rod, autosampler, and peristaltic pump;
• One field blank; and
• One trip blank.
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Appendix A
4 December 2020
Documentation
The project field team kept a daily record of field activities during the execution of field work
including sampling notes and observations documented on field forms, instrument calibration
records, measured field parameters, sample COC, and shipping records.
Laboratory Methods
Analytical Methods
Samples were analyzed for PFAS by the following methods:
• Table 3+ Laboratory Standard Operating Procedure (SOP); and
• EPA Method 537 Mod (Laboratory SOP).
PFAS reported under each of these methods are listed in Table 3.
Laboratory and Field QA/QC
Field sampling and laboratory analyses were performed largely in accordance with the PFAS
Characterization Sampling Plan (Geosyntec, 2019a). Samples were collected by the field team and
shipped to TestAmerica Sacramento (TestAmerica) under COC. Laboratory analyses were
performed within the guidelines specified by the laboratory SOPs. The collection frequency of
field duplicates, matrix spike / matrix spike duplicates (MS/MSD), trip blanks, and equipment
blanks was conducted in accordance with the PFAS Characterization Sampling Plan (Geosyntec,
2019a).
RESULTS – AUGUST 2020 EVENT
This section describes the data quality, field parameter data, and investigative sample results
from the August 2020 event. PFAS concentrations for all sample locations in the August 2020
event are provided in Table A1. Table A2 provides the total daily precipitation in the area of the
Facility and the flow measured at Outfall 002 at the times of sampling events discussed in this
report. Field parameters recorded during the August 2020 event are provided in Table A3.
Data Quality
All data from the August 2020 event were reviewed using the Data Verification Module (DVM)
within the LocusTM Environmental Information Management (EIM) system, which is 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 a data
review narrative report for each set of sample results which were consistent with Stage 2b of the
EPA Guidance for Labelling Externally Validated Laboratory Analytical Data for Superfund Use
(EPA-540-R-08-005 2009). 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.
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Appendix A
5 December 2020
The data were evaluated by the DVM against the following data usability checks:
• Hold time criteria;
• Field and laboratory blank contamination;
• Completeness of QA/QC samples;
• MS/MSD 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; and
• RPD between field duplicate sample pairs.
The manual review includes instrument-related QC results for calibration standards, blanks, and
recoveries. The data review process (DVM plus manual review) applied the following data
evaluation qualifiers to analysis results in the August 2020 event, as warranted:
• J – Analyte present. Reported value may not be accurate or precise;
• UJ – Analyte not detected. Reporting limit may not be accurate or precise; and
• R – Reject. The presence or absence of the analyte cannot be verified.
The data review process described above was performed for all laboratory chemical analytical data
generated for the sampling event. The DQOs were met for the analytical results for accuracy and
precision. The data collected during the August 2020 event are believed to be complete,
representative and comparable, with the exception of R-PSDA1, Hydrolyzed PSDA2, and R-EVE3.
As reported in the (Geosyntec, 2020d), studies have shown that the quantitation of R-PSDA,
Hydrolyzed PSDA, 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 can be calculated and presented in two ways: (i) summing over 17 of the 20 Table
3+ compounds, i.e., excluding results of R-PSDA, Hydrolyzed PSDA, and R-EVE, and (ii)
summing over 20 of the Table 3+ compounds. Expressing these data as a range represents possible
values of what these results might be without matrix interferences.
Because of this known matrix interference, results for R-PSDA, Hydrolyzed PSDA, and R-EVE
have been J-qualified for the August 2020 event (Table A1) and retrospectively for all events
(Appendix C).
Data Management and Reporting
Chemours’s Analytical Data Quality Management team currently uses the EIM system for
management of analytical data, xyz Site coordinate data, and field parameter data. Validation and

1 R-PSDA: 2,2,3,3,4,5,5,5-octafluoro-4-(1,1,2,2-tetrafluoro-2-sulfoethoxy)-pentanoic acid
2 Hydrolyzed PSDA: 2-fluoro-2-[1,1,2,3,3,3-hexafluoro-2-(1,1,2,2-tetrafluoro-2-sulfoethoxy)propoxy]-acetic acid 3 R-EVE: 4-(2-carboxy-1,1,2,2-tetrafluoroethoxy)-2,2,3,3,4,5,5,5-octafluoro-pentanoic acid
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Appendix A
6 December 2020
qualification of data are performed by AECOM who maintains the EIM system for the Chemours
Fayetteville Site. Whitebooks consisting of the data review narratives and the laboratory analytical
reports produced by AECOM summarize the findings of the DVM and manual review process.
QA/QC Samples
PFAS concentrations for all field QA/QC samples in the August 2020 event are reported in Table
4. The following observations were noted for the QA/QC samples:
• The RPD for field duplicate pairs in the August 2020 event were generally less than 30%
for all PFAS. Where RPDs were greater than 30%, the reported results may be imprecise
and were J qualified, indicating the results are estimated.
• No PFAS were detected above the associated reporting limits in the August 2020
Equipment Blanks (3), Trip Blank, or Field Blank.
August 2020 Event Field Parameter Data
Field parameters recorded during the August 2020 event are provided in Table A3 for grab
samples and temporal composite samples. Field parameters were measured using a Horiba U-52
model. The water quality meter was calibrated at the start of every sampling day.
For grab samples, field parameters were measured once prior to sampling using a flow through
cell. For temporal composite samples once during composite sampling and collected directly
from the water stream.
Recorded field parameter data observed during the August 2020 event are generally in
accordance with expectations for the sample locations, with the following exceptions:
• Most locations had recorded pH between 5 and 10. Location 22, the combined influent to
the wastewater treatment plant (WWTP), had pH greater than 10.
• Most locations had recorded DO between 5 and 9 mg/L. Location 14, the DuPont area
southeast stormwater and non-contact cooling water (NCCW) discharge, had the highest
DO measurements at 8.4 mg/L.
• Most locations had recorded ORP between 20 and 100 mV. Location 10A, the Combined
Chemours Monomers IXM NCCW and stormwater discharge, had the lowest ORP reading
at -7.1 mV. Location 21A, the Sediment Basin South, had the highest ORP reading at 179
mV.
• Most locations had recorded Turbidity between 0 and 100 NTU. Location 6A, the Kuraray
southern leased area NCCW discharge - Resins Area; Location 19B, the DuPont process
wastewater - Plant 2; and Location 21A, the Sediment Basin South all had Turbidity
measurements greater than 100 NTU at 149, 237, and 679 NTU respectively.
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Appendix A
7 December 2020
August 2020 Event Investigative Sample Results
PFAS concentrations for all sample locations in the August 2020 event are provided in Table A1.
Table A2 provides the total daily precipitation in the area of the Facility and the flow measured at
Outfall 002 at the times of sampling events discussed in this report. The analytical reporting limits
associated with the August 2020 data were determined by the laboratories. TestAmerica analytical
reports and the data review narrative whitebooks are provided as Attachment A to this appendix.
Trends and observations from the August 2020 event were generally consistent with previous
sampling events and are interpreted in conjunction with the entire dataset for the 18-month initial
characterization period in the main body of the report.

REFERENCES
Environmental Protection Agency (EPA), 2009. Guidance for Labelling Externally Validated
Laboratory Analytical Data for Superfund Use. Office of Solid Waste and Emergency Response.
OSWER No. 9200.1-85, EPA-540-R-08-005
Geosyntec, 2019a. PFAS Characterization Sampling Plan. May 6, 2019.
Geosyntec, 2019b. Characterization of PFAS in Process and Non-Process Wastewater and
Stormwater: Quarterly Report #1. July 31, 2019.
Geosyntec, 2019c. Characterization of PFAS in Process and Non-Process Wastewater and
Stormwater: Quarterly Report #2. October 31, 2019.
Geosyntec, 2019d. Assessment of HFPO-DA and PFMOAA in Outfall 002 Discharge and
Evaluation of Potential Control Options. August 2019.
Geosyntec, 2020a. Characterization of PFAS in Process and Non-Process Wastewater and
Stormwater: Quarterly Report #3. January 31, 2020.
Geosyntec, 2020b. Characterization of PFAS in Process and Non-Process Wastewater and
Stormwater: Quarterly Report #4. April 30, 2020.
Geosyntec, 2020c. Characterization of PFAS in Process and Non-Process Wastewater and
Stormwater: Quarterly Report #5. July 31, 2020.
Geosyntec, 2020d. Matrix Interference During Analysis of Table 3+ Compounds. Chemours
Fayetteville Works. July 31, 2020.

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TABLES

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TABLE A1
ANALYTICAL RESULTS - 2020 QUARTER 3
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID 1 6A 6B 7A
Sample Event August 2020 August 2020 August 2020 August 2020
Field Sample ID STW-LOC-1-4-082620 STW-LOC-6A-082620 STW-LOC-6B-082620 STW-LOC-7A-4-082620
Date Sampled 8/26/2020 8/26/2020 8/26/2020 8/26/2020
Analytical Laboratory TestAmerica TestAmerica TestAmerica TestAmerica
QA/QC --------
Table 3+ SOP (ng/L)
HFPODA 13 21 27 14
PFMOAA 5.0 24 31 5.2
PFO2HxA 14 23 32 13
PFO3OA 2.5 3.4 4.7 2.0
PFO4DA <2 <2 <2 <2
PFO5DA <2 <2 <2 <2
PMPA 60 80 53 57
PEPA <10 <10 <10 <10
PS Acid <2 <2 <2 <2
Hydro-PS Acid <2 <2 <2 <2
R-PSDA <2 <2 <2 <2
Hydrolyzed PSDA 3.0 10 <2 3.2
R-PSDCA <2 <2 <2 <2
NVHOS 6.5 <2 <2 6.5
EVE Acid <2 <2 <2 <2
Hydro-EVE Acid <2 <2 <2 <2
R-EVE <2 <2 <2 <2
PES <2 <2 <2 <2
PFECA B <2 <2 <2 <2
PFECA-G <2 <2 <2 <2
Total Table 3+ (17 compounds)*100 150 150 98
Total Table 3+ (20 compounds)*100 160 150 100
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate <2 <2 <2 <2
11Cl-PF3OUdS <2 <2 <2 <2
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)<20 <20 <20 <20
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)<20 <20 <20 <20
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol <2 <2 <2 <2
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol <4 <4 <4 <4
6:2 Fluorotelomer sulfonate <20 <20 <20 <20
9Cl-PF3ONS <2 <2 <2 <2
ADONA --------
DONA <2 <2 <2 <2
NaDONA --------
N-ethyl perfluorooctane sulfonamidoacetic acid <20 <20 <20 <20
N-ethylperfluoro-1-octanesulfonamide <2 <2 <2 <2
N-methyl perfluoro-1-octanesulfonamide <2 <2 <2 <2
N-methyl perfluorooctane sulfonamidoacetic acid <20 <20 <20 <20
Perfluorobutane Sulfonic Acid 4.1 4.2 4.6 4.0
Perfluorobutanoic Acid 4.3 5.5 5.9 4.4
Perfluorodecane Sulfonic Acid <2 <2 <2 <2
Perfluorodecanoic Acid <2 <2 <2 <2
Perfluorododecane sulfonic acid (PFDoS)<2 <2 <2 <2
Perfluorododecanoic Acid <2 <2 <2 <2
Perfluoroheptane sulfonic acid (PFHpS)<2 <2 <2 <2
Perfluoroheptanoic Acid 3.0 3.3 3.4 3.2
Perfluorohexadecanoic acid (PFHxDA)--------
Perfluorohexane Sulfonic Acid 3.6 4.1 3.8 4.1
Perfluorohexanoic Acid 7.1 7.5 7.5 6.8
Perfluorononanesulfonic acid <2 <2 <2 <2
Perfluorononanoic Acid <2 <2 <2 <2
Perfluorooctadecanoic acid <2 <2 <2 <2
Perfluorooctane Sulfonamide <2 <2 <2 <2
Perfluoropentane sulfonic acid (PFPeS)<2 <2 <2 <2
Perfluoropentanoic Acid 7.1 7.9 8.1 6.7
Perfluorotetradecanoic Acid <2 <2 <2 <2
Perfluorotridecanoic Acid <2 <2 <2 <2
Perfluoroundecanoic Acid <2 <2 <2 <2
PFOA 5.1 6 5.6 5.8
PFOS 7.4 11 9.7 10
Notes:
* - 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.
Locations sampled in August 2020 were collected on August 26, 2020.
Bold - Analyte detected above associated reporting limit
EPA - Environmental Protection Agency
J - Analyte detected. Reported value may not be accurate or precise
ND - No Table 3+ compounds were detected above their associated
reporting limits.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
R - Reject. The present or absence of the analyte cannot be verified.
SOP - standard operating procedure
UJ – Analyte not detected. Reporting limit may not be accurate or
precise.
-- - No data reported
< -Analyte not detected above associated reporting limit.
TR0795A Page 1 of 8 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE A1
ANALYTICAL RESULTS - 2020 QUARTER 3
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sample Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QC
Table 3+ SOP (ng/L)
HFPODA
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)*
Total Table 3+ (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
11Cl-PF3OUdS
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
9Cl-PF3ONS
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
Notes:
* - 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.
Locations sampled in August 2020 were collected on August 26, 2020.
Bold - Analyte detected above associated reporting limit
EPA - Environmental Protection Agency
J - Analyte detected. Reported value may not be accurate or precise
ND - No Table 3+ compounds were detected above their associated
reporting limits.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
R - Reject. The present or absence of the analyte cannot be verified.
SOP - standard operating procedure
UJ – Analyte not detected. Reporting limit may not be accurate or
precise.
-- - No data reported
< -Analyte not detected above associated reporting limit.
7B 7C 8 9
August 2020 August 2020 August 2020 August 2020
STW-LOC-7B-4-082620 STW-LOC-7C-4-082620 STW-LOC-8-4-082620 STW-LOC-9-4-082620
8/26/2020 8/26/2020 8/26/2020 8/26/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--------
20 24 96 51
41 36 470 5.7
27 23 200 15
6.3 5.4 50 3.8
4.8 <2 17 <2
5.2 <2 17 <2
56 63 52 40
<10 <10 15 <10
<2 26 <2 100
7.1 6.6 77 8.9
<2 <2 18 58
70 110 200 320
<2 <2 2.1 <2
8.5 8.0 30 3.2
<2 14 5.8 71
<2 10 6.1 55
10 11 17 19
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
180 220 1,000 3502603401,300 750
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
--------
<2 <2 <2 <2
--------
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
3.9 3.6 4.2 4.3
3.8 3.9 5.8 6.2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
3.5 3.3 4.6 4.2
--------
4.2 4.00 2.7 4.5
6.8 6.9 8.4 7.0
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
7.4 7.8 17 13
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
6.1 5.9 9.4 6.2
9.9 9.8 <2 12
TR0795A Page 2 of 8 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE A1
ANALYTICAL RESULTS - 2020 QUARTER 3
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sample Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QC
Table 3+ SOP (ng/L)
HFPODA
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)*
Total Table 3+ (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
11Cl-PF3OUdS
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
9Cl-PF3ONS
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
Notes:
* - 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.
Locations sampled in August 2020 were collected on August 26, 2020.
Bold - Analyte detected above associated reporting limit
EPA - Environmental Protection Agency
J - Analyte detected. Reported value may not be accurate or precise
ND - No Table 3+ compounds were detected above their associated
reporting limits.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
R - Reject. The present or absence of the analyte cannot be verified.
SOP - standard operating procedure
UJ – Analyte not detected. Reporting limit may not be accurate or
precise.
-- - No data reported
< -Analyte not detected above associated reporting limit.
10A 14
August 2020 August 2020 August 2020 August 2020
STW-LOC-10A-4-082620 STW-LOC-12-4-082620 STW-LOC-12-4-082620 STW-LOC-14-4-082620
8/26/2020 8/26/2020 8/26/2020 8/26/2020
TestAmerica TestAmerica TestAmerica TestAmerica
----Field Duplicate --
56 21 20 19
<4 12 J 12 8.7
15 21 22 17
2.4 3.6 3.9 2.5
<3 <2 <2 <2
<3.9 <2 <2 <2
<31 52 52 51
<10 <10 <10 <10
160 <2 <2 <2
12 <2 <2 <2
34 23 J <2 UJ <2
340 4.1 J 4.0 3.2
<2 <2 <2 <2
2.6 11 J <2 UJ 8.9
72 <2 <2 <2
49 <2 <2 <2
9.9 7.4 J <2 UJ <2
<2 <2 <2 <2
<2 <2 <2 <2
<2.4 <2 <2 <2
370 120 120 110750160160110
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
--------
<2 <2 <2 <2
--------
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
4.3 6.9 6.5 6.1
6.4 8.3 8.1 7.8
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
3.8 6.3 6.1 5.8
--------
4.2 6.5 6.2 6.2
7.4 12 12 11
<2 <2 UJ <2 <2
<2 2.1 2.0 <2
<2 UJ <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
12 14 14 12
<2 <2 <2 <2
<2 <2 UJ <2 <2
<2 <2 <2 <2
6.3 11 10 10
12 19 18 17
12
TR0795A Page 3 of 8 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE A1
ANALYTICAL RESULTS - 2020 QUARTER 3
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sample Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QC
Table 3+ SOP (ng/L)
HFPODA
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)*
Total Table 3+ (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
11Cl-PF3OUdS
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
9Cl-PF3ONS
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
Notes:
* - 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.
Locations sampled in August 2020 were collected on August 26, 2020.
Bold - Analyte detected above associated reporting limit
EPA - Environmental Protection Agency
J - Analyte detected. Reported value may not be accurate or precise
ND - No Table 3+ compounds were detected above their associated
reporting limits.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
R - Reject. The present or absence of the analyte cannot be verified.
SOP - standard operating procedure
UJ – Analyte not detected. Reporting limit may not be accurate or
precise.
-- - No data reported
< -Analyte not detected above associated reporting limit.
15 18 19A 19B
August 2020 August 2020 August 2020 August 2020
STW-LOC-15-4-082620 STW-LOC-18-4-082620 STW-LOC-19A-082620 STW-LOC-19B-082620
8/26/2020 8/26/2020 8/26/2020 8/26/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--------
51 9.5 4.2 4.7
<2 <2 5.5 <2
7.3 2.8 4.9 6.2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<10 <10 <10 <10
51 <2 3.1 <2
3.8 <2 <2 <2
15 10 <2 <2
150 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
27 <2 <2 <2
18 <2 <2 <2
3.4 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
160 12 18 11330221811
<2 <2 <2 <2
<2 <2 <2 <2 UJ
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2 UJ
--------
<2 <2 <2 <2 UJ
--------
<20 <20 <20 <20
<2 <2 <2 <2 UJ
<2 <2 <2 <2 UJ
<20 <20 <20 <20
4.2 <2 <2 <2
6.8 4.8 J <2 2.2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2 UJ
<2 <2 <2 <2
<2 <2 <2 <2 UJ
4.1 2.4 <2 <2
------<8
4.3 <2 <2 <2 UJ
7.6 2.3 2.5 2.9
<2 <2 <2 <2 UJ
<2 <2 <2 <2 UJ
<2 <2 UJ <2 UJ <2
<2 <2 <2 <2 UJ
<2 <2 <2 <2
13 3.3 2.9 3.9
<2 <2 <2 <2 UJ
<2 <2 <2 <2
<2 <2 <2 <2
6.4 2.5 2.7 3.4 J
12 4.4 <2 2.1 J
TR0795A Page 4 of 8 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE A1
ANALYTICAL RESULTS - 2020 QUARTER 3
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sample Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QC
Table 3+ SOP (ng/L)
HFPODA
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)*
Total Table 3+ (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
11Cl-PF3OUdS
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
9Cl-PF3ONS
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
Notes:
* - 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.
Locations sampled in August 2020 were collected on August 26, 2020.
Bold - Analyte detected above associated reporting limit
EPA - Environmental Protection Agency
J - Analyte detected. Reported value may not be accurate or precise
ND - No Table 3+ compounds were detected above their associated
reporting limits.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
R - Reject. The present or absence of the analyte cannot be verified.
SOP - standard operating procedure
UJ – Analyte not detected. Reporting limit may not be accurate or
precise.
-- - No data reported
< -Analyte not detected above associated reporting limit.
20 21A 22 23A
August 2020 August 2020 August 2020 August 2020
STW-LOC-20-4-042820 STW-LOC-21A-082620 STW-LOC-22-4-082620 STW-LOC-23A-2-082620
8/26/2020 8/26/2020 8/26/2020 8/26/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--------
57 16 99 J 69
<2 <2 <2 520
14 14 16 110
3.2 2.2 5.6 44
<2 <2 7.6 <30
<2 <2 6.4 <39
<20 23 <20 <310
<10 <10 <10 <10
24 <2 19 6,000
4.0 <2 59 230
12 <2 270 160
86 4.2 1,200 2,500
<2 <2 2.7 <8.7
<2 <2 14 24
12 <2 33 47
9.6 <2 14 7.4
4.8 <2 330 <36
<2 <2 <2 <3.4
<2 <2 <2 <13
<2 <2 <2 <24
150 55 280 7,100260592,100 9,700
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 UJ <20
<2 <2 <2 2.9
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
--------
<2 <2 <2 <2
--------
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
4.1 4.6 2.4 4.4
6.0 5.8 <2 R 20
<2 <2 <2 <2
<2 <2 <2 2.0
<2 <2 <2 <2
<2 <2 <2 4.1
<2 <2 <2 <2
3.8 3.6 2.1 4.6
--<2 ----
4.2 4.2 <2 3.8
7.1 7.3 3.7 J 8.3
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 UJ <2
<2 <2 <2 2.1
<2 <2 <2 <2
10 9.1 15 J 11
<2 <2 <2 3.4
<2 <2 <2 3.7
<2 <2 <2 2.4
6.2 6.5 4.0 23
11 5.4 4.7 17
TR0795A Page 5 of 8 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE A1
ANALYTICAL RESULTS - 2020 QUARTER 3
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sample Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QC
Table 3+ SOP (ng/L)
HFPODA
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)*
Total Table 3+ (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
11Cl-PF3OUdS
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
9Cl-PF3ONS
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
Notes:
* - 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.
Locations sampled in August 2020 were collected on August 26, 2020.
Bold - Analyte detected above associated reporting limit
EPA - Environmental Protection Agency
J - Analyte detected. Reported value may not be accurate or precise
ND - No Table 3+ compounds were detected above their associated
reporting limits.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
R - Reject. The present or absence of the analyte cannot be verified.
SOP - standard operating procedure
UJ – Analyte not detected. Reporting limit may not be accurate or
precise.
-- - No data reported
< -Analyte not detected above associated reporting limit.
23B 24B
August 2020 August 2020 August 2020 August 2020
STW-LOC-23B-082620 STW-LOC-24A-082620 STW-LOC-24A-082620-D STW-LOC-24B-082620
8/26/2020 8/26/2020 8/26/2020 8/26/2020
TestAmerica TestAmerica TestAmerica TestAmerica
----Field Duplicate --
25 28 30 15
<2 18 J 18 <2
18 26 J 14 J 13
2.8 4.1 2.2 2.1
<2 <2 <2 <2
<2 <2 <2 <2
32 53 J 21 J 22
<10 18 J <10 <10
33 <2 <2 <2
2.0 <2 <2 <2
<2 <2 2.5 15
35 7.9 J 4 J 5.5
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 35 J <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
110 150 85 521501909273
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
--------
<2 <2 <2 <2
--------
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
4.4 4.3 4.5 4.1
5.5 6.1 6.2 5.3
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
3.6 3.5 3.3 3.3
<2 ----<2
4.0 4.3 4.3 4.1
7.5 7.2 7.7 6.7
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
7.9 8.7 8.2 8.0
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
6.9 6.6 6.3 6.0
12 13 11 12
24A
TR0795A Page 6 of 8 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE A1
ANALYTICAL RESULTS - 2020 QUARTER 3
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sample Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QC
Table 3+ SOP (ng/L)
HFPODA
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)*
Total Table 3+ (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
11Cl-PF3OUdS
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
9Cl-PF3ONS
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
Notes:
* - 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.
Locations sampled in August 2020 were collected on August 26, 2020.
Bold - Analyte detected above associated reporting limit
EPA - Environmental Protection Agency
J - Analyte detected. Reported value may not be accurate or precise
ND - No Table 3+ compounds were detected above their associated
reporting limits.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
R - Reject. The present or absence of the analyte cannot be verified.
SOP - standard operating procedure
UJ – Analyte not detected. Reporting limit may not be accurate or
precise.
-- - No data reported
< -Analyte not detected above associated reporting limit.
24C EB EB EB
August 2020 August 2020 August 2020 August 2020
STW-LOC-24C-082620 STW-EQBLK-DR-082620 STW-EQBLK-IS-082620 STW-EQBLK-PP-082620
8/26/2020 8/26/2020 8/26/2020 8/26/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--Equipment Blank Equipment Blank Equipment Blank
14 <4 <4 <4
7.4 <2 <2 <2
13 <2 <2 <2
2.1 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
47 <20 <20 <20
<10 <10 <10 <10
2.7 <2 <2 <2
<2 <2 <2 <2
20 <2 <2 <2
14 <2 <2 <2
<2 <2 <2 <2
7.5 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
11 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
94 ND ND ND140NDNDND
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
--------
<2 <2 <2 <2
--------
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
4.0 <2 <2 <2
4.8 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
3.3 <2 <2 <2
--------
4.0 <2 <2 <2
6.5 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
7.2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
5.5 <2 <2 <2
9.2 <2 <2 <2
TR0795A Page 7 of 8 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE A1
ANALYTICAL RESULTS - 2020 QUARTER 3
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sample Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QC
Table 3+ SOP (ng/L)
HFPODA
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)*
Total Table 3+ (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
11Cl-PF3OUdS
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
9Cl-PF3ONS
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
Notes:
* - 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.
Locations sampled in August 2020 were collected on August 26, 2020.
Bold - Analyte detected above associated reporting limit
EPA - Environmental Protection Agency
J - Analyte detected. Reported value may not be accurate or precise
ND - No Table 3+ compounds were detected above their associated
reporting limits.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
R - Reject. The present or absence of the analyte cannot be verified.
SOP - standard operating procedure
UJ – Analyte not detected. Reporting limit may not be accurate or
precise.
-- - No data reported
< -Analyte not detected above associated reporting limit.
FBLK TB
August 2020 August 2020
STW-FBLK-082620 STW-TBLK-082620
8/26/2020 8/26/2020
TestAmerica TestAmerica
Field Blank Trip Blank
<4 <4
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<20 <20
<10 <10
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
ND NDNDND
<2 <2
<2 <2
<20 <20
<20 <20
<2 <2
<4 <4
<20 <20
<2 <2
----
<2 <2
----
<20 <20
<2 <2
<2 <2
<20 <20
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
----
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
TR0795A Page 8 of 8 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE A2
TOTAL DAILY PRECIPITATION - 2020 QUARTER 3
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Date Total Precipitation (inches)Measured Outfall Flow
(MGD)
7/1/2020 0.02 21
7/2/2020 --22
7/3/2020 --22
7/4/2020 --19
7/5/2020 --21
7/6/2020 --21
7/7/2020 0.13 21
7/8/2020 0.03 22
7/9/2020 0.03 21
7/10/2020 1.03 26
7/11/2020 0.02 20
7/12/2020 --21
7/13/2020 0.68 21
7/14/2020 --21
7/15/2020 --21
7/16/2020 --20
7/17/2020 --21
7/18/2020 --21
7/19/2020 --20
7/20/2020 0.68 22
7/21/2020 --22
7/22/2020 --21
7/23/2020 1.2 23
7/24/2020 0.14 21
7/25/2020 --21
7/26/2020 --21
7/27/2020 --21
7/28/2020 0.01 --
7/29/2020 0.01 --
7/30/2020 ----
7/31/2020 ----
8/1/2020 --20
8/2/2020 --20
8/3/2020 1.84 27
8/4/2020 0.36 21
8/5/2020 --20
8/6/2020 0.02 21
8/7/2020 1.08 22
8/8/2020 0.01 19
8/9/2020 0.07 20
8/10/2020 1.1 24
8/11/2020 0.01 20
8/12/2020 --19
8/13/2020 --20
8/14/2020 0.05 20
8/15/2020 0.47 20
8/16/2020 --18
8/17/2020 0.81 22
8/18/2020 --20
8/19/2020 0.22 20
8/20/2020 0.17 20
TR0795A Page 1 of 2 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE A2
TOTAL DAILY PRECIPITATION - 2020 QUARTER 3
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Date Total Precipitation (inches)Measured Outfall Flow
(MGD)
8/21/2020 0.06 19
8/22/2020 --17
8/23/2020 --18
8/24/2020 0.2 18
8/25/2020 --19
8/26/2020 --18
8/27/2020 0.01 19
8/28/2020 --21
8/29/2020 0.04 16
8/30/2020 --17
8/31/2020 0.02 17
9/1/2020 --17
9/2/2020 --16
9/3/2020 --16
9/4/2020 --16
9/5/2020 --16
9/6/2020 --16
9/7/2020 --16
9/8/2020 0.02 14
9/9/2020 0.37 17
9/10/2020 --16
9/11/2020 0.65 16
9/12/2020 --16
9/13/2020 --15
9/14/2020 --15
9/15/2020 --16
9/16/2020 0.02 16
9/17/2020 1.69 22
9/18/2020 0.09 15
9/19/2020 --15
9/20/2020 --17
9/21/2020 --16
9/22/2020 --16
9/23/2020 --16
9/24/2020 --16
9/25/2020 2 24
9/26/2020 0.01 16
9/27/2020 0.02 17
9/28/2020 0.02 17
9/29/2020 22
9/30/2020 0.01 16
Notes:
-- - below USGS measurement threshold
Precipitation data obtained from USGS rain gauge at W.O. Huske Dam.
MGD - million gallons per day
USGS - United States Geological Survey
72 hour period prior to sample collection date
Sample collection date
TR0795A Page 2 of 2 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE A3FIELD PARAMETERS - 2020 QUARTER 3 - AUGUST 2020 EVENTChemours Fayetteville Works, North CarolinaGeosyntec Consultants of NC, P.C.LocationSampling MethodpH Temperature (°C)Specific Conductivity (mS/cm)Dissolved Oxygen (mg/L)ORP (mV)Turbidity (NTU)1 Temporal Composite 8.3 30 0.3 5.0 25 186A Grab 8.0 32 2.4 0.0 47 1496B Grab 7.7 33 0.3 6.2 31 1067A Temporal Composite 8.2 31 0.2 6.9 10 197B Temporal Composite 8.2 31 0.3 6.6 3.6 157C Temporal Composite 8.0 32 0.2 6.6 21 318 Temporal Composite 8.2 33 2.9 0.4 51 5.79 Temporal Composite 8.1 31 0.2 5.8 18 2910A Temporal Composite 8.5 30 0.5 5.4 -7.1 2912 Temporal Composite 8.2 33 0.7 5.9 54 2.014 Temporal Composite 8.6 34 0.7 8.4 71 1415 Temporal Composite 7.7 32 0.1 6.8 30 5118 Temporal Composite 9.1 31 0.7 6.5 34 4919A Grab 7.3 40 0.1 5.6 49 2119B Grab 7.6 39 0.2 7.0 40 23720 Temporal Composite 7.9 32 0.2 7.4 39 1221A Grab 5.7 38 0.1 1.5 179 67922 Temporal Composite 10.2 33 2.0 6.1 5.1 9823A Temporal Composite 7.9 30 1.1 2.5 31 1.523B Grab 8.2 34 0.4 5.8 27 3.424A Grab 6.9 30 0.2 7.5 78 1824B Grab 7.3 31 0.2 7.1 77 1.224C Grab 7.5 35 0.2 6.6 58 2.0Notes:°C - degrees Celsiusmg/L - milligrams per litermS/cm - milliSiemens per centimetermV - millivoltNTU - nephelometric turbidity unitsORP - oxidation reduction potentialField parameters for the temporal composite samples were collected during sampling directly from the water stream only.TR0795APage 1 of 1December 2020DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672

ATTACHMENT A
Laboratory Reports and Data Review
Narrative Whitebooks

Laboratory reports are provided on a USB
memory storage drive that was shipped with
the hard copies provided to NCDEQ

DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
ADQM Data Review Narrative - FAY Stormwater Samp 820.doc 1 of 2
ADQM DATA REVIEW
NARRATIVE

Site Chemours FAY – Fayetteville

Project Stormwater Sampling 8/20

Project Reviewer Michael Aucoin, AECOM as a Chemours contractor

Sampling Dates August 26, 2020

Analytical Protocol

Laboratory Analytical Method Parameter(s)
TestAmerica - Sacramento 537 Modified PFAS1
TestAmerica - Sacramento Cl. Spec. Table 3
Compound SOP
Table 3+ compounds

1 Perfluoroalkylsubstances, a list of 35 compounds including HFPO-DA.

Sample Receipt

The following items are noted for this data set:

• All samples were received in satisfactory condition and within EPA temperature guidelines on
August 28, 2020.

Data Review

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 below:

• The non-detect result for PFBA in one sample was qualified R and should be considered to be
unusable due to a very poor surrogate (isotope dilution analyte) recovery.
• Several analytical results have been qualified J as estimated, and non-detect results qualified UJ
indicating an estimated reporting limit, due to poor recovery of a surrogate or matrix spike, a
transition mass ratio for the indicated analyte outside of the established ratio limits, and; poor
field duplicate precision. See the Data Verification Module (DVM) Narrative Report for which
samples were qualified, the specific reasons for qualification, and potential bias in reported
results.

Attachments

The DVM Narrative report is attached. The lab reports due to a large page count are stored on an
AECOM network shared drive and are available to be posted on external shared drives, or on a flash
drive.
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
ADQM Data Review Narrative - FAY Stormwater Samp 820.doc 2 of 2
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)/control sample duplicate (LCSD) recoveries and the RPD
between these spikes
• Surrogate spike recoveries for organic analyses
• 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.

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DVM Narrative ReportOne or more surrogates had relative percent recovery (RPR) values less than the data rejection level. The reported result is unusable.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:STORMWATER SAMPLING 8/20AnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsSTW-LOC-22-4-08262008/26/2020320-64117-4Perfluorobutanoic Acid0.0020UG/L537 ModifiedR3535_PFC0.0020PQLPage 1 of 9DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
High 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 8/20AnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsSTW-LOC-12-4-082620-D08/26/2020320-64096-2NVHOS0.0020UG/LCl. Spec. Table 3Compound SOPUJPFAS_DI_Prep0.0020PQLSTW-LOC-12-4-082620-D08/26/2020320-64096-2R-PSDA0.0020UG/LCl. Spec. Table 3Compound SOPUJPFAS_DI_Prep0.0020PQLSTW-LOC-12-4-082620-D08/26/2020320-64096-2R-EVE0.0020UG/LCl. Spec. Table 3Compound SOPUJPFAS_DI_Prep0.0020PQLPage 2 of 9DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Only one surrogate has relative percent recovery (RPR) values outside control limits and the parameter is a PFC (Nondetects).LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:STORMWATER SAMPLING 8/20AnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsSTW-LOC-22-4-08262008/26/2020320-64117-41H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)0.020ug/L537 ModifiedUJ3535_PFC0.020PQLSTW-LOC-10A-4-08262008/26/2020320-64093-3Perfluorooctadecanoicacid0.0020ug/L537 ModifiedUJ3535_PFC0.0020PQLSTW-LOC-18-4-08262008/26/2020320-64117-2Perfluorooctadecanoicacid0.0020ug/L537 ModifiedUJ3535_PFC0.0020PQLSTW-LOC-19A-08262008/26/2020320-64119-4Perfluorooctadecanoicacid0.0020ug/L537 ModifiedUJ3535_PFC0.0020PQLSTW-LOC-19B-08262008/26/2020320-64118-1N-methyl perfluoro-1-octanesulfonamide0.0020ug/L537 ModifiedUJ3535_PFC0.0020PQLSTW-LOC-19B-08262008/26/2020320-64118-1PerfluorohexaneSulfonic Acid0.0020UG/L537 ModifiedUJ3535_PFC0.0020PQLSTW-LOC-19B-08262008/26/2020320-64118-1Perfluoroheptanesulfonic acid (PFHpS)0.0020ug/L537 ModifiedUJ3535_PFC0.0020PQLSTW-LOC-19B-08262008/26/2020320-64118-1PerfluorononanoicAcid0.0020UG/L537 ModifiedUJ3535_PFC0.0020PQLSTW-LOC-19B-08262008/26/2020320-64118-1PerfluorotetradecanoicAcid0.0020UG/L537 ModifiedUJ3535_PFC0.0020PQLSTW-LOC-19B-08262008/26/2020320-64118-1N-ethylperfluoro-1-octanesulfonamide0.0020UG/L537 ModifiedUJ3535_PFC0.0020PQLSTW-LOC-19B-08262008/26/2020320-64118-1Perfluorononanesulfonic acid0.0020ug/L537 ModifiedUJ3535_PFC0.0020PQLSTW-LOC-19B-08262008/26/2020320-64118-1PerfluorooctaneSulfonamide0.0020UG/L537 ModifiedUJ3535_PFC0.0020PQLSTW-LOC-19B-08262008/26/2020320-64118-19Cl-PF3ONS0.0020ug/L537 ModifiedUJ3535_PFC0.0020PQLSTW-LOC-19B-08262008/26/2020320-64118-111Cl-PF3OUdS0.0020ug/L537 ModifiedUJ3535_PFC0.0020PQLSTW-LOC-19B-08262008/26/2020320-64118-1Perfluorododecanesulfonic acid (PFDoS)0.0020ug/L537 ModifiedUJ3535_PFC0.0020PQLSTW-LOC-19B-08262008/26/2020320-64118-1DONA0.0020ug/L537 ModifiedUJ3535_PFC0.0020PQLSTW-LOC-22-4-08262008/26/2020320-64117-4Perfluorooctadecanoicacid0.0020ug/L537 ModifiedUJ3535_PFC0.0020PQLPage 3 of 9DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Associated MS and/or MSD analysis had relative percent recovery (RPR) values less than the lower control limit. The actual detection limits may behigher than reported.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:STORMWATER SAMPLING 8/20AnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsSTW-LOC-12-4-08262008/26/2020320-64096-1Perfluorononanesulfonic acid0.0020ug/L537 ModifiedUJ3535_PFC0.0020PQLSTW-LOC-12-4-08262008/26/2020320-64096-1PerfluorotridecanoicAcid0.0020UG/L537 ModifiedUJ3535_PFC0.0020PQLPage 4 of 9DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Associated MS and/or MSD analysis had relative percent recovery (RPR) values higher than the upper control limit. The reported result may be biasedhigh.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:STORMWATER SAMPLING 8/20AnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsSTW-LOC-12-4-08262008/26/2020320-64096-1R-PSDA0.023UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSTW-LOC-12-4-08262008/26/2020320-64096-1Hydrolyzed PSDA0.0041UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSTW-LOC-12-4-08262008/26/2020320-64096-1Hydrolyzed PSDA0.0038UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSTW-LOC-12-4-08262008/26/2020320-64096-1R-EVE0.0074UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSTW-LOC-24A-08262008/26/2020320-64103-1Hydrolyzed PSDA0.0079UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSTW-LOC-24A-08262008/26/2020320-64103-1R-EVE0.035UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLPage 5 of 9DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
High 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 8/20AnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsSTW-LOC-12-4-08262008/26/2020320-64096-1NVHOS0.011UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSTW-LOC-12-4-08262008/26/2020320-64096-1NVHOS0.012UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSTW-LOC-12-4-08262008/26/2020320-64096-1R-PSDA0.025UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSTW-LOC-12-4-08262008/26/2020320-64096-1R-EVE0.0071UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSTW-LOC-24A-08262008/26/2020320-64103-1PMPA0.053UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.020PQLSTW-LOC-24A-08262008/26/2020320-64103-1PMPA0.045UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.020PQLSTW-LOC-24A-08262008/26/2020320-64103-1Hydrolyzed PSDA0.0084UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSTW-LOC-24A-08262008/26/2020320-64103-1R-EVE0.035UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSTW-LOC-24A-08262008/26/2020320-64103-1PEPA0.018UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.010PQLSTW-LOC-24A-08262008/26/2020320-64103-1PEPA0.023UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.010PQLSTW-LOC-24A-08262008/26/2020320-64103-1PFO2HxA0.026ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSTW-LOC-24A-08262008/26/2020320-64103-1PFO2HxA0.027ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSTW-LOC-24A-082620-D08/26/2020320-64103-2PMPA0.021UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.020PQLSTW-LOC-24A-082620-D08/26/2020320-64103-2Hydrolyzed PSDA0.0040UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSTW-LOC-24A-082620-D08/26/2020320-64103-2PFO2HxA0.014ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLPage 6 of 9DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Only one surrogate has relative percent recovery (RPR) values outside control limits and the parameter is a PFC (Detects).LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:STORMWATER SAMPLING 8/20AnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsSTW-LOC-22-4-08262008/26/2020320-64117-4PerfluorohexanoicAcid0.0037UG/L537 ModifiedJ3535_PFC0.0020PQLSTW-LOC-22-4-08262008/26/2020320-64117-4Hfpo Dimer Acid0.099UG/L537 ModifiedJ3535_PFC0.0040PQLSTW-LOC-19B-08262008/26/2020320-64118-1PFOA0.0034UG/L537 ModifiedJ3535_PFC0.0020PQLSTW-LOC-19B-08262008/26/2020320-64118-1PFOS0.0021UG/L537 ModifiedJ3535_PFC0.0020PQLSTW-LOC-18-4-08262008/26/2020320-64117-2Perfluorobutanoic Acid0.0048UG/L537 ModifiedJ3535_PFC0.0020PQLPage 7 of 9DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Associated MS and/or MSD analysis had relative percent recovery (RPR) values less than the lower control limit but above the rejection limit. Thereported result may be biased low.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:STORMWATER SAMPLING 8/20AnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsSTW-LOC-12-4-08262008/26/2020320-64096-1PFMOAA0.012ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSTW-LOC-12-4-08262008/26/2020320-64096-1PFMOAA0.012ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSTW-LOC-24A-08262008/26/2020320-64103-1PFMOAA0.018ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSTW-LOC-24A-08262008/26/2020320-64103-1PFMOAA0.018ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLPage 8 of 9DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
One or more surrogates had relative percent recovery (RPR) values less than the data rejection level. The reported result may be biased low.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:STORMWATER SAMPLING 8/20AnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsSTW-LOC-22-4-08262008/26/2020320-64117-4PerfluoropentanoicAcid0.015UG/L537 ModifiedJ3535_PFC0.0020PQLPage 9 of 9DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672

APPENDIX B
Sitewide and Targeted Stormwater
Sampling Summary

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APPENDIX B
SITEWIDE AND TARGETED STORMWATER SAMPLING
OCTOBER 2019 AND MARCH 2020

INTRODUCTION
This memorandum was prepared by Geosyntec Consultants of NC, P.C. (Geosyntec) for The
Chemours Company, FC, LLC (Chemours) to describe the results from two wet weather sampling
events conducted at locations representing stormwater-only runoff at the Chemours Fayetteville
Works, North Carolina site (the Site). Sampling was conducted to assess per- and polyfluoroalkyl
substances (PFAS) concentrations from stormwater locations at the Site (i.e., from drainage ditches
or channels before stormwater enters the Site Conveyance Network and mixes with dry weather
flows).
An initial sitewide stormwater sampling event occurred in June 2019, and results were reported in
the Assessment of HFPO-DA and PFMOAA in Outfall 002 Discharge and Evaluations of Potential
Control Options1 (2019 Outfall 002 Assessment). In the 2019 Outfall 002 Assessment,
hexafluoropropylene oxide dimer acid (HFPO-DA) and perfluoro-2-methoxyaceticacid
(PFMOAA) analytical results from samples collected from Outfall 002 and from the Cape Fear
River (at a location representing the river intake), between June 2017 and July 2019, were
evaluated. HFPO-DA concentrations generally increased during wet weather, indicating that
stormwater is a source of HFPO-DA loading to Outfall 002. Results from the June 2019 sitewide
stormwater sampling event (presented in the 2019 Outfall 002 Assessment) showed that
stormwater concentrations were generally higher than those measured at Outfall 002, particularly
during dry weather. Stormwater concentrations were spatially variable throughout the Site, with
certain sample clusters indicating potential areas of higher concentration and loading.
Subsequent stormwater sampling events (described herein) were conducted sitewide (October
2019) and from within targeted areas (March 2020). Stormwater sampling was conducted to
continue to support the investigations related to Paragraph 12 in the executed Consent Order
entered February 25, 2019 amongst Chemours and the North Carolina Department of
Environmental Quality (NCDEQ) and Cape Fear River Watch (CFRW). These data are also being
used by Chemours in preparing to implement the stormwater capture and treatment requirements
pursuant to Paragraph 4(a) of the Addendum to Consent Order Paragraph 12 (CO Addendum),
entered into court on August 13, 2020.

1 Submitted as Attachment 3 to the Cape Fear River PFAS Loading Reduction Plan (August 2019) (Reduction Plan).
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The sitewide stormwater grab sampling, conducted in June 2019 and again in October 2019,
sampled stormwater representing comingled runoff from various “surface types” (e.g., roofs, plant
equipment, paved areas, pervious area, walkways). A subsequent event was conducted in March
2020 to assess investigate PFAS concentrations in stormwater runoff from the various surface
types individually in the Chemours Monomers Ion Exchange Materials (IXM) area (Monomers
area) and Chemours Polymer Processing Aid (PPA) area as these two areas showed the most
elevated PFAS concentrations in prior sampling events.
This appendix presents information from the sitewide stormwater sampling event conducted in
October 2019, in addition to the targeted surface type stormwater sampling event in March 2020.
As previously noted, the June 2019 sitewide stormwater sampling event was reported in the 2019
Outfall 002 Assessment.
SAMPLING OBJECTIVES
The objective of the sitewide stormwater sampling conducted in October 2019 was to continue to
characterize PFAS concentrations in stormwater only flow across the Site. Informed by the results
of the June and October 2019 sitewide stormwater sampling, the objective of the targeted surface
type stormwater sampling conducted in March 2020 was to perform a more detailed investigation
of stormwater runoff concentrations within the Monomers and PPA areas and examine the
distribution of PFAS by surface type within these areas.
SAMPLING LOCATIONS
October 2019 Sitewide Stormwater Sampling Locations
Stormwater-only grab and time series samples were collected during the October 2019 sitewide
sampling event. The stormwater-only grab samples represented stormwater points of entry into the
Site Conveyance Network and did not include any dry weather flows (i.e., non-contact cooling
water [NCCW], river discharge, other process water). Samples were collected from 24 stormwater-
only locations throughout the Site. The time series samples (also obtained as grab samples) were
collected at four grab sample locations at equally spaced intervals throughout the duration of the
storm event and subsequent wash out. The sample locations are shown in Figure B1 and listed in
Table B1.
March 2020 Targeted Surface Type Stormwater Sampling Locations
Stormwater-only grab samples were collected during this sampling event, from within the
Monomers and PPA areas. The drainage areas to each sampling location represented various
surface types (i.e., overhead piping, pavement, pervious/gravel, rooftop, miscellaneous). The
sample locations are shown in Figures B2 and B3 and listed in Table B2.
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There were 31 locations sampled during the targeted surface type stormwater sampling event, with
25 locations in the Monomers area and six locations in the PPA area. In the Monomers area, the
following surface types were represented by sample locations:
• Overhead piping: One (1) sample location (gutter/pipe discharge);
• Pavement: Three (3) sample locations (all sheet flow);
• Pervious and gravel: Six (6) sample locations (all sheet flow);
• Roof: 11 sample locations (all gutter/pipe discharge);
• Miscellaneous inlets: One (1) sample location (sheet flow); and
• Mixed surface types: Three (3) sample locations (two or more surface types).
In the PPA area, the following surface types were represented by sample locations:
• Pavement: One (1) sample location (sheet flow);
• Pavement and pervious/gravel: One (1) sample location (sheet flow);
• Roof: Three (3) sample locations (all gutter/pipe discharge); and
• Miscellaneous inlet: One (1) sample location (sheet flow).

SAMPLING PROCEDURES
The sitewide and targeted surface type stormwater sampling involved collecting stormwater runoff
samples from sampling locations during a rain event. Samples were collected for laboratory
analysis, and water quality parameters were also collected. Methods are described below in the
Methods section.
Parsons of NC conducted the field work and sampling described in this memorandum. All work
was performed according to the project health and safety plan prepared by Parsons (Parsons Health
and Safety Plan Chemours Fayetteville Site, 2018). A Plan on Action Discussion and Project
Safety Analysis was held prior to commencing field activities.
Sample Collection
Sitewide stormwater samples were collected from the locations specified in Table B1 and shown
in Figure B1. Targeted surface type stormwater samples were collected from the locations
specified in Table B2 and shown in Figures B2 and B3. Time-series samples are denoted in the
figures as “-1”, “-2”, and “-3” in order of sample time. Grab samples were collected in 250
milliliter (mL) high density polyethylene (HDPE) bottles with a wide-mouth screw-cap. Bottles
were either filled by hand or using a properly decontaminated dip rod with the bottle attached with
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a nylon zip tie. Sample bottle caps were securely fastened after sample collection. Sample
collection began once 0.1 inches of rainfall had fallen. Each sample was labelled with a unique
sample identification number, date, time and location of sampling, and the initials of the individual
collecting the sample. A field notebook was used to record information regarding additional items
such as quality assurance/ quality control (QA/QC), sample identifications, field parameters, and
other observations.
Water Quality Parameter Assessment
Water quality parameters were also collected at the locations where samples were collected. All
equipment was inspected by the field program on-Site supervisor and calibrated at least daily prior
to use in the field according to the manufacturer’s recommended guidelines. Calibration
information was recorded in a field logbook. Field parameters were measured with a water quality
meter after sample collection and include the following:
• pH;
• Total dissolved solids [TDS] (milligrams per liter, mg/L); and
• Turbidity (nephelometric turbidity units, NTU).
Decontamination Methods
Sample containers were new and used only once for each sample. Disposable equipment (e.g.,
gloves, tubing, etc.) was not reused and these items did not require decontamination. All non-
dedicated or non-disposable sampling equipment was decontaminated immediately before sample
collection in the following manner:
• De-ionized water rinse;
• Scrub with de-ionized water containing non-phosphate detergent (i.e., Alconox®); and
• De-ionized water rinse.
Sample Shipping, Chain of Custody, and Holding Times
Upon sample collection, each labelled, containerized sample was placed into a plastic bag inside
an insulated sample cooler with ice. Prior to shipment of the samples to the laboratory, a chain of
custody (COC) form was completed by the field sample custodian. Sample locations, sample
identification numbers, description of samples, number of samples collected, and specific
laboratory analyses to be performed on the samples were recorded on the COC form. The COC
was signed by the field personnel relinquishing the samples to the courier and was signed by the
laboratory upon receipt of the cooler.
Field QA/QC Samples
The following field QA/QC samples were collected and analyzed during each sampling event:
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• Two blind field duplicates (one for every 20 samples);
• One equipment blank for the dip rod;
• One field blank; and
• One trip blank2.
Documentation
The project field team kept a daily record of field activities during the execution of field work
including sampling notes and observations, instrument calibration records, measured field
parameters, sample COC, and shipping records.
Laboratory Analyses
Laboratory analyses varied between the two sampling events.
Sitewide Stormwater Sampling
Stormwater samples from the sitewide stormwater sampling event in October 2019 were analyzed
for PFAS by the Table 3+ Laboratory Standard Operating Procedure (SOP) and EPA Method 537
Mod (Laboratory SOP). PFAS reported under each of these methods are listed in Table B3.
Samples were analyzed by TestAmerica Sacramento.
The SOP for laboratory analysis of Table 3+ parameters includes filtering all samples through a
0.2 micrometer (µm) filter. Therefore, stormwater samples from the October 2019 sitewide
sampling event were filtered with a 0.2 µm filter.
Targeted Surface Type Stormwater Sampling
Stormwater samples from the targeted surface type stormwater sampling event in March 2020
were analyzed for total PFAS by the Table 3+ SOP. PFAS reported under this method are listed in
Table B3. Samples were analyzed by Lancaster Laboratories. Stormwater samples from the
targeted surface type stormwater sampling event, representing “total” PFAS, were not filtered
(through the typical Table 3+ SOP requirement of a 0.2 µm filter) in the field or upon arrival at
the laboratory.3 Select grab samples from the targeted surface type stormwater sampling event

2 Only collected during the October 2019 sampling event. 3 Due to a high level of visible suspended solids in the samples from locations 68 and 85, the “total” PFAS samples
from these locations were filtered with a 0.45 µm filter prior to analysis. These results are presented with other “total” PFAS concentrations in the maps and bar plots, including notes to specify the varying filtering protocol. However, these data are not included in the boxplots or statistical analyses because the analytical methods are not consistent with the other “total” PFAS samples.
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were also analyzed for dissolved (i.e., filtrate) PFAS.4 These samples were filtered at the laboratory
with a 0.45 µm filter.
RESULTS AND DISCUSSION
This section discusses the data quality protocols, Table 3+ compounds analyzed, and discussion
of the results from each stormwater sampling event.
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 a data review narrative report 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 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; and
• RPD between field duplicate sample pairs.
A manual review of the data was also conducted and includes instrument-related quality control
results for calibration standards, blanks, and recoveries. 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;

4 Select grab samples (as specified in Table B2) were also analyzed for Total Suspended Solids (TSS) and solid residue collected on the filter (particulate PFAS). Results for these analyses are included in Attachment B-2.
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• UJ Analyte not present below the reporting limit, reporting limit may not be accurate or
precise; and
• B Analyte present in a blank sample, reported value may have a high bias.
The data review process described above was performed for all laboratory chemical analytical data
generated for the sampling events. 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.
Table 3+ Compounds
As reported in the Matrix Interference During Analysis of Table 3+ Compounds memorandum
(Geosyntec, 2020a), 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 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 describe the Total Table 3+ (sum of 17 compounds).
The tables include both the Total Table 3+ (sum of 17 compounds) and Total Table 3+ (sum of 20
compounds).
Sitewide Stormwater Sampling
Sampling was conducted between 9:50 AM and 12:45 PM on October 16, 2019. Prior to the
sampled rain event, there was an antecedent dry period of 48 hrs. Sampling began after 0.3 inches
of rain had fallen and throughout the sampling event, there was an additional 0.07 inches of
rainfall. The cumulative rainfall throughout the rain event, in addition to the period when sampling
occurred, is shown in Figure B4. At each sampling location, the project field team recorded field
parameter measurements and observations. Field notes and measurements are shown in Table B4
and the full field forms, including photographs, are included in Attachment A-1.
Compared to the June 2019 sitewide stormwater sampling event (average Total Table 3+
concentration = 17,000 ng/L), PFAS concentrations in stormwater during the October 2019
sampling event were generally higher (average Total Table 3+ concentration = 45,000 ng/L).
Consistent with the June 2019 results, the highest concentrations in stormwater were observed in
the Monomers area, as shown in the map in Figure B1 and the plots in Figure B5 and Figure B6.
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Appendix B 19 December 2020 Page 8
8 December 2020
The average Total Table 3+ concentration in the Monomers area was 330,000 nanograms per liter
(ng/L), which was higher than the average at the rest of the Site (excluding the Monomers area)
(19,000 ng/L).
Two locations were sampled in the Monomers area (Locations 10 and 42) in October 2019. Three
time series samples were collected from Location 42. Sample results showed that concentrations
at this location were elevated throughout the sampling event; Total Table 3+ concentrations ranged
from 340,000 ng/L (second of the three times series samples) to 530,000 ng/L (first of the three
samples). Furthermore, Locations 10 and 42 had the two highest PFMOAA and Total Table 3+
concentrations of any location sampled during the event, and Location 10 had the highest HFPO-
DA concentration. This is consistent with the June 2019 stormwater sampling results, where the
highest stormwater concentrations were observed in the Monomers area.
The PPA area was also identified in the June 2019 event as another area with elevated PFAS
concentrations in stormwater, although not as elevated as in the Monomers area. During the
October 2019 sitewide sampling event, this spatial trend was not as evident. Stormwater
concentrations in the PPA area were within the range of concentrations at the rest of the Site for
HFPO-DA (range of 820 to 2,300 ng/L, range at locations not within the PPA or Monomers areas
was 180 to 80,000 ng/L), as shown in Figure B6. Further, the average Total Table 3+ concentration
in the PPA area (2,500 ng/L) was actually lower compared to the rest of the Site (excluding the
Monomers and PPA areas) (21,000 ng/L).
Location 54 in the southwestern portion of the Site also exhibited elevated PFAS concentrations
during the October 2019 stormwater sampling event, with concentrations of 80,000 ng/L, 650
ng/L, and 96,000 ng/L for HFPO-DA, PFMOAA, and Total Table 3+, respectively. Location 52
also exhibited elevated concentrations during both the June and October 2019 stormwater
sampling events. Stormwater concentrations in October 2019 were 23,000 ng/L, 3,100 ng/L, and
85,000 ng/L, for HFPO-DA, PFMOAA, and Total Table 3+, respectively. This sampling location
drains a small area north of the cooling water channel in the Monomers area, in the northeast corner
of the Site (just east of the north easternmost building on Site), which ultimately drains to the
seeps. These waters will be treated pursuant to the requirements of the CO Addendum Paragraph
2(c)(i).
Targeted Surface Type Stormwater Sampling
Targeted surface type stormwater sampling was conducted between 10:45 AM and 3:30 PM on
March 5, 2020. Prior to the sampled storm, there was an antecedent dry period of 31 hrs. There
was 0.14 inches of rain before sampling began. During the sampling period, there was
approximately 0.1 inches of rain and rainfall intensity ranged from 0.01 to 0.05 inches per hour,
as shown in Figure B7. Rainfall intensity was fairly constant throughout the sampling period. At
each sampling location, the project field team recorded field parameter measurements and
observations. Field notes and measurements are shown in Table B5 and the full field forms,
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Appendix B 19 December 2020 Page 9
9 December 2020
including photographs, are included in Attachment A-2. Observations regarding surface types were
used to verify and revise the original designations for each sampling location.
Results from the targeted surface type stormwater sampling event in March 2020, in the Monomers
area, are shown in Figure B2 and the plots in Figure B8 and Figure B9. The plots are colored based
on the surface types of the sampling location drainage areas. In the Monomers area, average Total
Table 3+ concentrations during the targeted surface type stormwater sampling event (53,000 ng/L)
were lower than during the June 2019 and October 2019 sitewide sampling events (74,000 ng/L
and 330,000 ng/L, respectively). A similar trend was observed at the sample location in the
Monomers area that was sampled during all three stormwater sampling events (Location 42),
where the Total Table 3+ concentrations were 150,000 ng/L (average of time-series samples),
440,000 ng/L (average of time-series samples), and 130,000 ng/L, in June 2019, October 2019,
and March 2020, respectively.
Consistent with the results from the sitewide sampling event, concentrations were highest in the
Monomers area. During the targeted surface type stormwater sampling event, trends between
surface types (i.e., overhead piping, pavement, pervious/gravel, rooftop, miscellaneous) were
consistent for HFPO-DA, PFMOAA, and Total Table 3+ concentrations. Total Table 3+
concentrations for areas draining pavement were compared against locations draining other surface
types using a Mann Whitney U test with a significance level of 0.05. While the median Total Table
3+ concentration for locations draining pavement (73,000 ng/L, n = 5) was higher than the median
concentration for locations draining other surface types (10,000 ng/L, n = 19), the Mann Whitney
U test revealed no statistically significant difference (p-value = 0.08). Elevated concentrations
were measured at locations draining various surface types, suggesting that all surface types
evaluated contributed to the PFAS concentrations observed in Monomers area stormwater.
Concentrations in stormwater samples from the PPA area were lower than concentrations in
samples from the Monomers area, as shown in the map in Figure B3 and the charts in Figure B8
and Figure B9. The average Total Table 3+ concentration in the PPA area was 480 ng/L compared
to 53,000 ng/L in the Monomers area. In the PPA area, the concentration at the sampling location
draining pavement was slightly higher than concentrations at sampling locations draining other
surface types5. However, even the concentration in the area with pavement (Total Table 3+
concentration = 900 ng/L) was lower than the concentrations in the majority of samples (from all
surface types) in the Monomers area.
Select grab samples from the targeted surface type stormwater sampling event were also analyzed
for dissolved (i.e., filtrate) PFAS. Dissolved concentrations were compared against total
concentrations for HFPO-DA, PFMOAA, and Total Table 3+. As shown in Figure B10, total and
dissolved PFAS concentrations were generally equivalent for each sample. The average dissolved

5 Sample sizes were not sufficiently large to perform statistical tests on surface type data from the PPA area.
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10 December 2020
fraction for Total Table 3+ was 92%, indicating that PFAS in stormwater is primarily in the
dissolved form.
CONCLUSIONS
Wet weather sampling was conducted at locations representing stormwater-only runoff at the Site,
in order to assess PFAS concentrations from stormwater locations. Stormwater sampling was
conducted at sitewide locations in June and October 2019, and sampling was again conducted in
March 2020, in targeted areas only (Monomers and PPA areas), to investigate PFAS
concentrations in stormwater runoff from the various surface types. The June 2019 sampling event
was reported in the 2019 Outfall 002 Assessment, and the October 2019 and March 2020 sampling
events are presented herein.
The sitewide stormwater sampling results from October 2019 showed that PFAS concentrations
in stormwater were highest in the Monomers area, consistent with findings from the June 2019
stormwater sampling event. During the October 2019 and March 2020 sampling events,
stormwater concentrations in the PPA area were consistent with the rest of the Site and notably
lower than the Monomers area. Because the stormwater sampling locations from the two sitewide
sampling events represented comingled runoff from various surface types (e.g., roofs, paved areas,
pervious areas), a targeted surface stormwater sampling event was conducted, in the Monomers
and PPA areas, to determine if certain surface types were contributing higher concentrations of
PFAS in stormwater.
Stormwater runoff concentrations exhibited notable spatial variation during the targeted surface
type sampling event, between the two areas assessed. The sitewide average stormwater
concentration, excluding the Monomers area, was 19,000 ng/L for Total Table 3+ during the
October 2019 stormwater sampling event. Additionally, as discussed in the 2019 Outfall 002
Assessment, the concentrations measured at Outfall 002 were separated into estimated
concentrations and flows from stormwater versus dry weather flows. Based on the approach
outlined in the 2019 Outfall 002 Assessment, the average concentration of stormwater at Outfall
002 was estimated to be 9,600 ng/L (considering Outfall 002 data from August 2019 through May
2020). This estimated average stormwater concentration includes contributions from the
Monomers area.
As presented herein, the average Total Table 3+ stormwater concentration from the Monomers
area was 330,000 ng/L and 53,000 ng/L during the October 2019 and March 2020 stormwater
sampling events, respectively. This data suggest that average PFAS stormwater concentrations
measured in the Monomers area are consistently higher than the sitewide average stormwater
concentrations, as estimated from concentrations measured at Outfall 002 and as measured during
sitewide stormwater sampling. PFAS concentrations were consistently higher in the Monomers
area than the PPA area. Given that the two areas are similar in size and therefore contribute similar
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Appendix B 19 December 2020 Page 11
11 December 2020
flows, this indicates that the Monomers area is likely the most significant contributor of PFAS
concentrations to stormwater at Outfall 002.
Within the Monomers area, there was no clear relationship between concentrations and surface
types. Within the Monomers area, surface type did not appear to affect concentrations in
stormwater. Additionally, PFAS concentrations in stormwater were found to be predominantly in
the dissolved fraction.

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Appendix B 19 December 2020 Page 12
12 December 2020
REFERENCES
Geosyntec, 2020a. Matrix Interference During Analysis of Table 3+ Compounds. Chemours
Fayetteville Works. June 30, 2020.
Parsons, 2018. Health and Safety Plan Chemours Fayetteville Site.
****
Enclosures:
Table B1: October 2019 Sitewide Stormwater Sampling Locations
Table B2: March 2020 Targeted Surface Type Sampling Locations
Table B3: PFAS and Associated Analytical Methods
Table B4: October 2019 Sitewide Stormwater Sampling Field Notes
Table B5: March 2020 Targeted Surface Type Sampling Field Notes

Figure B1: Map of Sitewide Stormwater Sampling – October 2019: HFPO-DA, PFMOAA, and
Total Table 3+ Concentrations
Figure B2: Map of Chemours Monomers/IXM Area – March 2020: HFPO-DA, PFMOAA, and
Total Table 3+ Concentrations
Figure B3: Map of Kuraray SentryGlas and Chemours PPA Area – March 2020: HFPO-DA,
PFMOAA, and Total Table 3+ Concentrations
Figure B4: Cumulative Rainfall of 10/16/2019 at Chemours Fayetteville
Figure B5: Sitewide Stormwater Samples by Location: HFPO-DA, PFMOAA, and Total Table
3+ Concentrations
Figure B6: Sitewide Stormwater Samples by Site Region: HFPO-DA, PFMOAA, and Total
Table 3+ Concentrations
Figure B7: Cumulative Rainfall on 3/5/2020 at USGS station 02105500
Figure B8: Targeted Surface Type Samples by Location: HFPO-DA, PFMOAA, and Total Table
3+ Concentrations
Figure B9: Sitewide Stormwater Samples by Surface Type: HFPO-DA, PFMOAA, and Total
Table 3+ Concentrations
Figure B10: Dissolved vs Total: HFPO-DA, PFMOAA, and Total Table 3+ Concentrations

Attachment A: Field Forms
Attachment B: Analytical Results
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TABLES

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TABLE B1
OCTOBER 2019 SITEWIDE STORMWATER SAMPLING LOCATIONS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC P.C.
Location Individual Grab Sample1 Time Series Samples2
2 
3 
5 
10 
13 
25 
26 
27 
28 
29 
30 
31 
32 
33 
34 
35 
36 
37 
38 
39 
40 
41 
42 
43 
44 
45 
46 
47 
52 
53 
54 
55 
1 - Samples were collected for:
Total PFAS, by EPA Method 537 Mod and Table 3+ Lab SOP.
2 - Collected 3 separate grab samples at equally spaced intervals throughout the duration of the
storm event and subsequent wash out.
December 2020TR0795A
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TABLE B2
MARCH 2020 TARGETED SURFACE TYPE SAMPLING
LOCATIONS Chemours Fayetteville Works, North
Carolina
Geosyntec Consultants of NC P.C.
Location Surface Type1 Sample Type2 Individual Grab
Sample3
Dissolved PFAS, Solid
Residue, and TSS4
61 Grass, Pavement, and
Pervious/Gravel Sheet flow 
79 Micellaneous Inlet Sheet flow 
83 Miscellaneous Inlet Sheet flow 
78 Overhead Piping Gutter/Pipe Discharge 
68 Pavement Sheet flow 
71 Pavement Sheet flow 
80 Pavement Sheet flow 
84 Pavement Sheet flow 
85 Pavement and
Pervious/Gravel Sheet flow 
62 Pervious/Gravel Sheet flow 
63 Pervious/Gravel Sheet flow 
64 Pervious/Gravel Sheet flow 
65 Pervious/Gravel Sheet flow 
77 Pervious/Gravel Sheet flow 
63A Pervious/Gravel Sheet flow 
42 Roof Gutter/Pipe Discharge 
43 Roof Gutter/Pipe Discharge 
58 Roof Gutter/Pipe Discharge 
59 Roof Gutter/Pipe Discharge 
60 Roof Gutter/Pipe Discharge 
66 Roof Gutter/Pipe Discharge 
67 Roof Gutter/Pipe Discharge 
72 Roof Gutter/Pipe Discharge 
73 Roof Gutter/Pipe Discharge 
75 Roof Gutter/Pipe Discharge 
76 Roof Gutter/Pipe Discharge 
86 Roof Gutter/Pipe Discharge 
87 Roof Gutter/Pipe Discharge 
88 Roof Gutter/Pipe Discharge 
69 Roof and Pavement Sheet flow 
70 Roof, Pervious/Gravel,
and Pavement Sheet flow 
1 - Surface type corresponds to source material of stormwater at specified location.
2 - Sample type corresponds to type of discharge and collection method.
3 - For the stormwater source area sampling event, samples were collected for:
4 - Select grab samples were also analyzed for the following:
Total PFAS by Table 3+ Lab SOP. Samples were shipped to Lancaster Laboratories. Samples were not
filtered (through the typical Table 3+ SOP requirement of a 0.2 µm filter) upon arrival at the laboratory.
Dissolved PFAS by Table 3+ Lab SOP using a 0.45 µm filter (dissolved or filtrate PFAS, in ng/L).
Filtering was conducted at the lab.
Total Suspended Solids (TSS, in mg/L)
Solid residue collected on the filter (particulate PFAS, in ng/mL)
TR0795A December 2020
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TABLE B3PFAS AND ASSOCIATED ANALYTICAL METHODSChemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
HFPO-DA*Hexafluoropropylene oxide dimer acid 13252-13-6 C6HF11O3
PEPA Perfluoro-2-ethoxypropionic acid 267239-61-2 C5HF9O3
PFECA-G Perfluoro-4-isopropoxybutanoic acid 801212-59-9 C12H9F9O3S
PFMOAA Perfluoro-2-methoxyacetic acid 674-13-5 C3HF5O3
PFO2HxA Perfluoro-3,5-dioxahexanoic acid 39492-88-1 C4HF7O4
PFO3OA Perfluoro-3,5,7-trioxaoctanoic acid 39492-89-2 C5HF9O5
PFO4DA Perfluoro-3,5,7,9-tetraoxadecanoic acid 39492-90-5 C6HF11O6
PMPA Perfluoro-2-methoxypropionic acid 13140-29-9 C4HF7O3
Hydro-EVE Acid 2,2,3,3-tetrafluoro-3-({1,1,1,2,3,3-hexafluoro-3-[(1,2,2,2-tetrafluoroethyl)oxy]propan-2-yl}oxy)propionic acid 773804-62-9 C8H2F14O4
EVE Acid 2,2,3,3-tetrafluoro-3-({1,1,1,2,3,3-hexafluoro-3-[(1,2,2-trifluoroethenyl)oxy]propan-2-yl}oxy)propionic acid 69087-46-3 C8HF13O4
PFECA B Perfluoro-3,6-dioxaheptanoic acid 151772-58-6 C5HF9O4
R-EVE Pentanoic acid, 4-(2-carboxy-1,1,2,2-tetrafluoroethoxy)-
2,2,3,3,4,5,5,5-octafluoro 2416366-22-6 C8H2F12O5
PFO5DA Perfluoro-3,5,7,9,11-pentaoxadodecanoic acid 39492-91-6 C7HF13O7
R-PSDA Pentanoic acid, 2,2,3,3,4,5,5,5-octafluoro-4-(1,1,2,2-tetrafluoro-
2-sulfoethoxy)2416366-18-0 C7H2F12O6S
R-PSDCA Ethanesulfonic acid, 1,1,2,2-tetrafluoro-2-[1,2,2,3,3-pentafluoro-1-(trifluoromethyl)propoxy]2416366-21-5 C6H2F12O4S
Hydrolyzed PSDA Acetic acid, 2-fluoro-2-[1,1,2,3,3,3-hexafluoro-2-(1,1,2,2-
tetrafluoro-2-sulfoethoxy)propoxy]2416366-19-1 C7H3F11O7S
NVHOS 1,1,2,2,4,5,5,5-heptafluoro-3-oxapentanesulfonic acid; or 2-
(1,2,2,2-ethoxy)tetrafluoroethanesulfonic acid; or 1-(1,1,2,2-
tetrafluoro-2-sulfoethoxy)-1,2,2,2-tetafluoroethane
1132933-86-8 C4H2F8O4S
PES Perfluoro-2-ethoxyethanesulfonic acid 113507-82-7 C4HF9O4S
PS Acid Ethanesulfonic acid, 2-[1-[difluoro[(1,2,2-trifluoroethenyl)oxy]methyl]-1,2,2,2-tetrafluoroethoxy]-1,1,2,2-tetrafluoro 29311-67-9 C7HF13O5S
Hydro-PS Acid Ethanesulfonic acid, 2-[1-[difluoro(1,2,2,2-tetrafluoroethoxy)methyl]-1,2,2,2-tetrafluoroethoxy]-1,1,2,2-tetrafluoro 749836-20-2 C7H2F14O5S
PFBA Perfluorobutanoic acid 375-22-4 C4HF7O2
PFDA Perfluorodecanoic acid 335-76-2 C10HF19O2
PFDoA Perfluorododecanoic acid 307-55-1 C12HF23O2
PFHpA Perfluoroheptanoic acid 375-85-9 C7HF13O2
PFNA Perfluorononanoic acid 375-95-1 C9HF17O2
PFOA Perfluorooctanoic acid 335-67-1 C8HF15O
PFHxA Perfluorohexanoic acid 307-24-4 C6HF11O2
PFPeA Perfluoropentanoic acid 2706-90-3 C5HF9O2
PFTeA Perfluorotetradecanoic acid 376-06-7 C14HF27O2
PFTriA Perfluorotridecanoic acid 72629-94-8 C13HF25O2
PFUnA Perfluoroundecanoic acid 2058-94-8 C11HF21O2
PFBS Perfluorobutanesulfonate 375-73-5 C4HF9SO
PFDS Perfluorodecanesulfonate 335-77-3 C10HF21O3S
PFHpS Perfluoroheptanesulfonic acid 375-92-8 C7HF15O3S
PFHxS Perfluorohexanesulfonic acid 355-46-4 C6HF13SO3
PFNS Perfluorononanesulfonate 68259-12-1 C9HF19O3S
PFOS Perfluorosulfonic acid 1763-23-1 C8HF17SO3
PFPeS Perfluoropentane sulfonic acid 2706-91-4 C5HF11O3S
10:2 FTS Fluorotelomer sulfonate 10:2 120226-60-0 C12H5F21O3
4:2 FTS Fluorotelomer sulfonate 4:2 757124-72-4 C6H5F9O3S
6:2 FTS Fluorotelomer sulfonate 6:2 27619-97-2 C8H5F13SO3
8:2 FTS Fluorotelomer sulfonate 8:2 39108-34-4 C10H5F17O3S
NEtFOSAA N-ethyl perfluorooctane sulfonamidoacetic acid 2991-50-6 C12H8F17NO4S
NEtPFOSA N-ethylperfluoro-1-octanesulfonamide 4151-50-2 C10H6F17NO2S
NEtPFOSAE N-ethyl perfluorooctane sulphonamidoethanol 1691-99-2 C12H10F17NO3S
NMeFOSAA N-methyl perfluorooctane sulfonamidoacetic acid 2355-31-9 C11H6F17NO4S
NMePFOSA N-methyl perfluoro-1-octanesulfonamide 31506-32-8 C9H4F17NO2S
NMePFOSAE N-methyl perfluorooctane sulfonamidoethanol 24448-09-7 C11H8F17NO3S
PFDOS Perfluorododecanesulfonic acid 79780-39-5 C12HF25O3S
PFHxDA Perfluorohexadecanoic acid 67905-19-5 C16HF31O2
PFODA Perfluorooctadecanoic acid 16517-11-6 C18HF35O2
PFOSA Perfluorooctane Sulfonamide 754-91-6 C8H2F17NO2S
F-53B Major F-53B Major 73606-19-6 C8HClF16O4S
F-53B Minor F-53B Minor 83329-89-9 C10HClF20O4S
ADONA 4,8-dioxa-3H-perfluorononanoate 958445-44-8 C7H2F12O4
NaDONA NaDONA EVS1361 --
DONA DONA 919005-14-4 --
Notes:
*HFPO-DA may also appear on the EPA Method 537 Mod analyte list
EPA - Environmental Protection Agency
PFAS - per- and polyfluoroalkyl substances
SOP - Standard Operating Procedure
Chemical Formula
Table 3+ Lab SOP
EPA Method 537 Mod
Analytical Method Common Name Chemical Name CASN
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TABLE B4
OCTOBER 2019 SITEWIDE STORMWATER
SAMPLING FIELD NOTES Chemours Fayetteville
Works, North Carolina
Geosyntec Consultants of NC P.C.
Location ID Sample Date and Time Temperature (°C)Sky Precipitation Wind (mph)pH TDS Turbidity Observations
55 10/16/19 9:48 18 Cloudy Rain 5.00 4.95 0.066 255
52 10/16/19 10:10 20 Cloudy Rain 5.00 5.36 0.023 608
10 10/16/19 10:30 19 Cloudy Rain 6.00 5.68 0.037 53.5 Taken further up from road because of vac truck
40 10/16/19 10:42 19 Cloudy Rain 6.00 5.86 0.057 11.3
41 10/16/19 10:45 19 Cloudy Rain 6.00 5.9 0.049 80
2 10/16/19 11:00 19 Cloudy Rain 6.00 6.09 0.027 100
25 10/16/19 11:05 19 Cloudy Rain 6.00 5.97 0.016 16.2
3 10/16/19 11:10 19 Cloudy Rain 6.00 6 0.011 136
27 10/16/19 11:25 19 Cloudy Rain 6.00 6.07 0.012 1000 Great deal of leaf litter in ditch
28 10/16/19 11:30 19 Cloudy Rain 6.00 6.07 0.014 105
5 10/16/19 11:50 21 Cloudy Rain 6.00 6.36 0.016 15.4
30 10/16/19 11:55 21 Cloudy Rain 6.00 5.85 0.024 151
31 10/16/19 12:10 21 Cloudy Rain 8.00 5.83 0.013 154 MS/REP/DUP
32 10/16/19 12:20 21 Cloudy Rain 8.00 6.26 0.019 1000 MS REP DUP
34 10/16/19 12:45 21 Cloudy None 8.00 6.34 0.032 890
33 10/16/19 12:40 21 Cloudy None 8.00 6.25 0.026 822
54 10/16/19 12:55 21 Cloudy None 8.00 6.55 0.023 1000
36 10/16/19 13:05 21 Cloudy None 8.00 6.57 0.036 12.1
13 10/16/19 13:20 21 Cloudy Rain 8.00 6.69 0.017 9.5
37 10/16/19 13:27 22 Cloudy None 9.00 6.43 0.05 1000
39 10/16/19 13:50 22 Cloudy None 5.00 6.78 0.047 0.8
38 10/16/19 13:35 22 Cloudy None 3.00 6.07 0.026 0.2
35 10/16/19 13:20 22 Cloudy None 2.00 6.71 0.025 86.4
42 10/16/19 10:26 19 Cloudy Rain 3.00 5.4 0.048 16.3 Took from larger white plastic pipe (East side)
35 10/16/19 10:55 19 Cloudy None 6.00 5.81 0.024 66.4 Taken from opposing side of 35
38 10/16/19 11:13 20 Cloudy Rain 3.00 5.91 0.036 14.4
39 10/16/19 11:23 20 Cloudy Rain 3.00 6.28 0.061 1.8
42 10/16/19 11:50 21 Cloudy None 5.00 6.55 0.023 13.2
35 10/16/19 12:10 21 Cloudy None 5.00 6.52 0.023 52.4
38 10/16/19 12:25 21 Cloudy None 3.00 6.46 0.032 0
39 10/16/19 12:35 21 Cloudy None 4.00 6.71 0.049 7.2
42 10/16/19 12:45 Cloudy None 6.72 0.03 7
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TABLE B5
MARCH 2020 TARGETED SURFACE TYPE SAMPLING
FIELD NOTES Chemours Fayetteville Works, North
Carolina
Geosyntec Consultants of NC P.C.
Location ID Sample Date
and Time
Temperature
(°C)Sky Precipitation Wind
(mph)
Measured
Flow Rate
(L/min)
pH TDS Turbidity Observations
42 3/5/20 11:20 11 Cloudy Rain 4.00 1.8 7.72 0.15 7.99 Flow from pipe
43 3/5/20 11:30 11 Cloudy Rain 4.00 2.1 7.85 0.13 126.35 Flow from pipe
58 3/5/20 12:45 10 Cloudy Rain 4.00 2.3 7.71 0 1.83 Sample from roof of building
59 3/5/20 12:50 10 Cloudy Rain 4.00 1.4 7.6 0.03 33.56 Sample most likely from pavement
60 3/5/20 12:55 10 Cloudy Rain 4.00 1.3 7.66 0.02 1.72 Sample coing from roof of building
61 3/5/20 11:15 11 Cloudy Rain 2.00 NS 7.83 0.11 139.87
Sample taken from beneath grate. Flow coming from gravel/sand/grass
field to the NW. Couldn't get flow due to multiple entry locations into
grate.
62 3/5/20 15:00 10 Cloudy Rain 4.00 0.3 8.39 0.12 49.77 None
63 3/5/20 10:45 11 Cloudy Rain 6.00 NS 7.99 0.23 189.88
Collected sample from water flowing into drainage ditch. Water
flowing from gravel area to the north. Could not get flow rate.Sample
from imperious surface
63A 3/5/20 13:45 9 Cloudy Rain 8.00 3.1 7.22 0.01 4.34 Sample coming from gravel area west of pipe, sampled from pipe.
64 3/5/20 13:20 11 Cloudy Rain 8.00 3 7.28 0.02 38.7 Sample flowing from gravel area south of culvert
65 3/5/20 13:30 11 Cloudy Rain 8.00 NS 7.52 0.04 338 Sample coming from gravel area south of colvert and also from pavement (road) west of location. Can’t get flow rate due to rocks
66 3/5/20 13:50 9 Cloudy Rain 7.00 0.25 7.08 0.01 1.64 Sample from roof of building
67 3/5/20 14:00 9 Cloudy Rain 7.00 0.57 7.03 0.02 1.61 Sample from roof
68 3/5/20 14:30 9 Cloudy Rain 7.00 NS 6.7 0.04 420.72 Sample coming from pavement to the NW of grateUnable to get flow
rate due to multiple entry’s into grate
69 3/5/20 14:40 11 Cloudy Rain 7.00 NS 7.69 0.02 23.73 No flow due to multiple entry waysSample from pavement coming
from road and processing area
70 3/5/20 14:50 11 Cloudy Rain 7.00 7.55 0.05 32.54 No flow rate. Sample coming from runoff from gravel area
71 3/5/20 13:20 11 Cloudy Rain 4.00 0.3 7.85 0.13 163.16 Sample taken by dip rod. Flow coming from crack in the concrete,
seeping from puddles around grate
72 3/5/20 23:10 10 Cloudy Rain 3.00 0.2 7.79 0.1 2.57 Flow from roof
73 3/5/20 11:00 11 Cloudy Rain 3.00 0.3 7.76 0.06 0.54 Flow from roof
75 3/5/20 14:30 10 Cloudy Rain 6.00 0.2 7.54 0.06 0.3 Water coming from roof
76 3/5/20 14:00 10 Cloudy Rain 6.00 0.2 7.69 0.16 4.51 Flow from rooftop
77 3/5/20 12:50 12 Cloudy Rain 6.00 0.5 7,52 0.04 29.75 Flow coming from road run off into drain
78 3/5/20 12:40 11 Cloudy Rain 5.00 0.1 7.25 0.05 1.29
Flow estimated by volume in tray after 30 seconds, sample taken from
downspout from steel tray attached below overhead pipes. Sample
taken from HDPE tray seen in photo.
79 3/5/20 23:40 11 Cloudy Rain 5.00 NS 7.68 0.05 28.28 Sample coming from location 79. Under from trailer and into grate. Unclear if coming from pipe or from pool after the pipe.Couldn’t get
flow due to multiple entry points
80 3/5/20 11:45 10 Cloudy Rain 5.00 NS 8.04 0.07 99.64 Sample coming from imperious surface. Loading/unloading area at
IXM.Couldn’t get flow due to multiple entrys into grate
83 3/5/20 14:15 9 Cloudy Rain 8.00 1.1 7.27 0.07 15.24 Drain from ppa lab gutter, closest to ppa
84 3/5/20 12:20 10 Cloudy Rain 8.00 1.7 7.13 0.05 15.97 Sentry glass sheet flow sampled with dip rod at pipe in ditch, located
adjacent to ppa
85 3/5/20 15:30 9 Cloudy Rain 7.00 0.2 6.53 0.01 27.82 Location flows into wood lined ditch, very light rain. Flow through the
gravel
TR0795A December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE B5
MARCH 2020 TARGETED SURFACE TYPE SAMPLING
FIELD NOTES Chemours Fayetteville Works, North
Carolina
Geosyntec Consultants of NC P.C.
Location ID Sample Date
and Time
Temperature
(°C)Sky Precipitation Wind
(mph)
Measured
Flow Rate
(L/min)
pH TDS Turbidity Observations
86 3/5/20 13:43 10 Cloudy Rain 7.00 0.061 6.87 0.1 5.82 Pipe coming from trailer roof at ppa. The pipe is the one closest to ppa
not the entrance
87 3/5/20 11:40 11 Cloudy Rain 7.00 13.2 7.59 0.07 4.13 Roof drain pipe drain from Sentry glass facing PPA
88 3/5/20 15:06 9 Cloudy Rain 8.00 NS 6.87 0 4.11 second to last drainage pipe from roof at sentry glass, behind towards
main gate. Could not measure flow, likely about 5 liters per minute
TR0795A December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672

14 December 2020

FIGURES

DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
")
")")
")
")")
")")
")")
")
")")
")")
")
")
")
")
")")
")
")")
")
")")")
Waste Water TreatmentPlantDischarge
Du Po nt A r eaWoodLinedTrench
O pe n Ch an ne l to Ou t fa l l 00 2
C o o l i ng Wat er Ch an ne l
26
27
28
30
33
55
37 38-1
41
40
52
53
10
2 3
5
338-38-2
43
3435-1
39-1
35-2
35-3
339-39-2
3132
42-1
36
4
42-3
2-2
Sitewide Stormwater – October 2019
HFPO-DA, PFMOAA, and Total Table 3+ Concentrations
Chemours Fayetteville Works, North Carolina
Figure
B1Raleigh
500 0 500250 Feet
³
December 2020
Projection: NAD 1983 StatePlane North Carolina FIPS 3200 Feet; Units in Foot US
Legend
")Stormwater Grab Sample Location
Discharge Areas
Wood Lined Trench
Waste Water Treatment Plant Discharge
Cooling Water Channel
Open Channel to Outfall 002
DuPont Area Ditches
")
")
13
25 "
")
54
"
""
"
""
""
""
""
""
""
"
"
"
"
""
"
""
"
"
"""
"
Notes:
HFPO-DA - Hexafluoropropylene oxide dimer acid
J - estimated valueng/L - nanograms per liter
PFMOAA - Perfluoro-2-methoxyacetic acid
1. Samples collected in October 2019.
2. All concentrations are in ng/L.3. Total Table 3+ (17) concentrations are summed over 17compounds (excluding R-PSDA, Hydrolyzed PSDA, and R-EVE),
and include HFPO-DA results evaluated by EPA Method 537 Mod.4. Non-detect values were not included in sum of total Table 3+results.
5. Total Table 3+ results include J-qualified data.6. Samples were filtered with a 0.2 µm filter7. Aerial imagery provided by ESRI Basemaps, 2017.
Constituent
98,000
22,000
220,000Total Table 3+ (17)
PFMOAA
HFPO-DA
5,900
350 J
11,000Total Table 3+ (17)
PFMOAA
HFPO-DA
5,800
410
11,000Total Table 3+ (17)
PFMOAA
HFPO-DA
45,000
220,000
530,000Total Table 3+ (17)
PFMOAA
HFPO-DA
33,000
130,000
340,000Total Table 3+ (17)
PFMOAA
HFPO-DA
35,000
190,000
450,000Total Table 3+ (17)
PFMOAA
HFPO-DA
23,000
3,100
85,000Total Table 3+ (17)
PFMOAA
HFPO-DA
1,500
56 J
2,600Total Table 3+ (17)
PFMOAA
HFPO-DA
2,300
250 J
3,500Total Table 3+ (17)
PFMOAA
HFPO-DA
180
<5
590Total Table 3+ (17)
PFMOAA
HFPO-DA
1,100
150
3,500Total Table 3+ (17)
PFMOAA
HFPO-DA
480
37
1,500Total Table 3+ (17)
PFMOAA
HFPO-DA
4,900
2,400
22,000Total Table 3+ (17)
PFMOAA
HFPO-DA
340 / 330
48 J / 51
1,400 / 1,300Total Table 3+ (17)
PFMOAA
HFPO-DA
340 / 330
48 J / 51
1,400 / 1,300Total Table 3+ (17)
PFMOAA
HFPO-DA
2,900 J / 2,300 J
550 / 600
57,000 / 61,000Total Table 3+ (17)
PFMOAA
HFPO-DA
3,800
280
8,200Total Table 3+ (17)
PFMOAA
HFPO-DA
1,900
500 J
8,800Total Table 3+ (17)
PFMOAA
HFPO-DA1,300
380 J
4,400Total Table 3+ (17)
PFMOAA
HFPO-DA
1,400
330
4,100Total Table 3+ (17)
PFMOAA
HFPO-DA
1,600
610 J
5,300Total Table 3+ (17)
PFMOAA
HFPO-DA
2,100
190 J
5,000Total Table 3+ (17)
PFMOAA
HFPO-DA
14,000
3,100
65,000Total Table 3+ (17)
PFMOAA
HFPO-DA 1,700
290
6,700Total Table 3+ (17)
PFMOAA
HFPO-DA
2,200
640
9,300Total Table 3+ (17)
PFMOAA
HFPO-DA
420
57 J
1,500Total Table 3+ (17)
PFMOAA
HFPO-DA
390
54
1,400Total Table 3+ (17)
PFMOAA
HFPO-DA
820
190 J
1,800Total Table 3+ (17)
PFMOAA
HFPO-DA
370
48
1,400Total Table 3+ (17)
PFMOAA
HFPO-DA
820
16
1,300Total Table 3+ (17)
PFMOAA
HFPO-DA
1,800
510
8,000Total Table 3+ (17)
PFMOAA
HFPO-DA
760
150 J
3,500Total Table 3+ (17)
PFMOAA
HFPO-DA
80,000
650
96,000Total Table 3+ (17)
PFMOAA
HFPO-DA
Result (ng/L)Duplicate Result (ng/L)"P:\PRJ\Projects\TR0795\Database and GIS\Illustrator\Wastewater and Stormwater Quarterly Report\Fig B1_Site-Wide Stormwater October 2019_Q32020.ai"DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
63A Cool
ing Water Channe
l
60
59
58
75
43
71
67666365
64
62
68**68**
80
79
78 77
76
73 72
69 70
42
61
74*
57*
81*
Chemours Monomers/IXM Area – March 2020HFPO-DA, PFMOAA, and Total Table 3+ Concentrations
Chemours Fayetteville Works, North Carolina
Figure
B2Raleigh
150 0 15075 Feet
³Path: P:\PRJ\Projects\TR0795\Database and GIS\GIS\Targeted Stormwater Sampling\Fig1_SW_HFPODA_ChemoursMonoIXM_Apr20_TR0807.mxd Last Revised: 4/7/2020 Author: jkasunicDecember 2020
Projection: NAD 1983 StatePlane North Carolina FIPS 3200 Feet; Units in Foot US
Legend
Stormwater Grab Sample Location
Source Area Types
Miscellaneous Inlets
Overhead Piping
Pavement
Pervious and Gravel Areas
Roof
Cooling Water Channel
Chemours Monomers IXM
"P:\PRJ\Projects\TR0795\Database and GIS\Illustrator\Wastewater and Stormwater Quarterly Report\Fig B2_ChemoursMonoIXM_Oct20_Q32020.ai"Constituent
520
22
810Total Table 3+ (17)
PFMOAA
HFPO-DA
19,000 J
100,000 J
180,000Total Table 3+ (17)
PFMOAA
HFPO-DA
15,000 J
12,000 J
160,000Total Table 3+ (17)
PFMOAA
HFPO-DA
5,100
77,000
100,000Total Table 3+ (17)
PFMOAA
HFPO-DA
3,500
110,000
130,000Total Table 3+ (17)
PFMOAA
HFPO-DA910
18
1,100Total Table 3+ (17)
PFMOAA
HFPO-DA 1,500
21
1,700Total Table 3+ (17)
PFMOAA
HFPO-DA
300 J
12 J
530Total Table 3+ (17)
PFMOAA
HFPO-DA
86,000
14,000
430,000Total Table 3+ (17)
PFMOAA
HFPO-DA
32,000 J / 30,000 J
9,300 J / 8,900 J
73,000 / 69,000Total Table 3+ (17)
PFMOAA
HFPO-DA
6,200
1,100
18,000Total Table 3+ (17)
PFMOAA
HFPO-DA
9,600
2,100
22,000Total Table 3+ (17)
PFMOAA
HFPO-DA
3,600
48
5,200Total Table 3+ (17)
PFMOAA
HFPO-DA
2,900 J
250 J
5,200Total Table 3+ (17)
PFMOAA
HFPO-DA
14,000
7,600
33,000Total Table 3+ (17)
PFMOAA
HFPO-DA
1,000 J
33 J
1,400Total Table 3+ (17)
PFMOAA
HFPO-DA
860
21
20,000Total Table 3+ (17)
PFMOAA
HFPO-DA
2,100
49
12,000Total Table 3+ (17)
PFMOAA
HFPO-DA
12,000 J / 9,800 J
250 J / 270 J
54,000 / 55,000Total Table 3+ (17)
PFMOAA
HFPO-DA3,800 J
210 J
13,000Total Table 3+ (17)
PFMOAA
HFPO-DA
1,800 J
140 J
3,800Total Table 3+ (17)
PFMOAA
HFPO-DA
2,300 J
2,300 J
10,000Total Table 3+ (17)
PFMOAA
HFPO-DA
1,300
480
4,900Total Table 3+ (17)
PFMOAA
HFPO-DA
1,100
9.1
2,100Total Table 3+ (17)
PFMOAA
HFPO-DA
12,000 J / 9,800 J
250 J / 270 J
54,000 / 55,000Total Table 3+ (17)
PFMOAA
HFPO-DA
Result (ng/L)Duplicate Result (ng/L)
210,000
1,600
330,000Total Table 3+ (17)
PFMOAA
HFPO-DA
Notes:
HFPO-DA - Hexafluoropropylene oxide dimer acid
IXM - ion exchange materialsJ - estimated valueng/L - nanograms per literPFMOAA - Perfluoro-2-methoxyacetic acid
1. Samples collected on March 5, 2020.2. All concentrations are in ng/L.3. Total Table 3+ (17) concentrations are summed over 17 compounds(excluding R-PSDA, Hydrolyzed PSDA, and R-EVE), and include
HFPO-DA results evaluated by EPA Method 537 Mod.
4. Non-detect values were not included in sum of total Table 3+ results.5. Total Table 3+ results include J-qualified data.6. * - Location was not sampled during the March 5, 2020 samplingevent because location was either dry or water was stagnant.
7. ** - Due to a high level of visible sediment in the sample, the sample
was filtered in the laboratory using a 0.45 um filter prior to analysis.8. Aerial imagery provided by ESRI Basemaps, 2017.
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
8788
86
85**85**
84
83
Wood Lined Trenc
hWood Lined Trench
2*
3*
82*
Kuraray SentryGlas and Chemours PPA Area – March 2020 HFPO-DA, PFMOAA, and Total Table 3+ Concentrations
Chemours Fayetteville Works, North Carolina
Figure
B3Raleigh
150 0 15075 Feet
³Path: P:\PRJ\Projects\TR0795\Database and GIS\GIS\Targeted Stormwater Sampling\TR0795_Targeted Stormwater Sampling Locations in Kuraray SentryGlas Leased Area and Chemours PPA Area.mxd Last Revised: 2/13/2020 Author: jkasunicDecember 2020
Projection: NAD 1983 StatePlane North Carolina FIPS 3200 Feet; Units in Foot US
Legend
Stormwater Grab Sample Location
Source Area Types
")Miscellaneous Inlets
Pavement
")Roof
Wood Lined Trench
Chemours Polymer Processing Aid (PPA) Area
Kuraray SentryGlas® Leased Area
Notes:HFPO-DA - Hexafluoropropylene oxide dimer acid
ng/L - nanograms per liter
PFMOAA - Perfluoro-2-methoxyacetic acidPPA - Polymer Processing Aid
1. Samples collected on March 5, 2020.
2. All concentrations are in ng/L.
3. Total Table 3+ (17) concentrations are summed over 17 compounds(excluding R-PSDA, Hydrolyzed PSDA, and R-EVE), and includeHFPO-DA results evaluated by EPA Method 537 Mod.4. Non-detect values were not included in sum of total Table 3+ results.
5. Total Table 3+ results include J-qualified data.
6. * - Location was not sampled during the March 5, 2020 samplingevent because location was either dry or water was stagnant.7. ** - Due to a high level of visible sediment in the sample, the samplewas filtered in the laboratory using a 0.45 um filter prior to analysis.
8. Aerial imagery provided by ESRI Basemaps, 2017."P:\PRJ\Projects\TR0795\Database and GIS\Illustrator\Wastewater and Stormwater Quarterly Report\Fig B3_SW_sampling_PPA_2020Q3.ai"Result(ng/L)Constituent
660
<5
710Total Table 3+ (17)
PFMOAA
HFPO-DA 220
<5
260Total Table 3+ (17)
PFMOAA
HFPO-DA
280
<5
280Total Table 3+ (17)
PFMOAA
HFPO-DA
740
40
900Total Table 3+ (17)
PFMOAA
HFPO-DA
260
<5
260Total Table 3+ (17)
PFMOAA
HFPO-DA
260
<5
260Total Table 3+ (17)
PFMOAA
HFPO-DA
730
<5
800Total Table 3+ (17)
PFMOAA
HFPO-DA
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Notes: \\projectsitesb.geosyntec.com@SSL\DavWWWRoot\5\FWConsentOrder\Shared Documents\11 - Paragraph 11\P11 Tasks\Quarterly Reports\06_October 2020\Appendix\Appendix B - Stormwater Grab Sampling\Figures and TabCumulative Rainfall on 10/16/2019 at Chemours Fayetteville
Chemours Fayetteville Works, North Carolina
Stormwater samples collected between 9:50 AM and 12:45 PM on October 16, 2019Rainfall data obtained from Chemours Fayetteville meteorological station
Figure
B4
Raleigh December 2020
0.3
0.37
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0:000:250:501:151:402:052:302:553:203:454:104:355:005:255:506:156:407:057:307:558:208:459:109:3510:0010:2510:5011:1511:4012:0512:3012:5513:2013:4514:1014:3515:0015:2515:5016:1516:4017:0517:3017:5518:2018:4519:1019:3520:0020:2520:5021:1521:4022:0522:3022:5523:2023:45Cumulative Rainfall (in)Time
10/16/2019 Total Rainfall
Sampling
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
\\projectsitesb.geosyntec.com@SSL\DavWWWRoot\5\FWConsentOrder\Shared Documents\11 - Paragraph 11\P11 Tasks\Quarterly Reports\06_October 2020\Appendix\Appendix B - Stormwater Grab Sampling\FiSitewide Stormwater Samples by Location
HFPO-DA, PFMOAA, and Total Table 3+ Concentrations
Chemours Fayetteville Works, North Carolina
Figure
B5
Raleigh December 2020
Notes:
-Stormwater samples were collected 10/16/2020-Total Table 3+ is calculated as the sum of 17compounds
-Four locations had three timeseries samplescollected. Denoted in order of sample time as "-1",
"-2", and "-3".
-Samples were filtered with a 0.2 µm filterAcronyms:
ng/L: nanograms per literDUP: duplicate sample
Legend
Chemours Monomers/IXM AreaKuraraySentryGlas/Chemours PPA AreaOther
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Notes: \\projectsitesb.geosyntec.com@SSL\DavWWWRoot\5\FWConsentOrder\Shared Documents\11 - Paragraph 11\P11 Tasks\Quarterly Reports\06_October 2020\Appendix\Appendix B - Stormwater Grab Sampling\FiSitewide Stormwater Samples by Site Region
HFPO-DA, PFMOAA, and Total Table 3+ Concentrations
Chemours Fayetteville Works, North Carolina
Figure
B6
Raleigh December 2020
-Stormwater samples were collected 10/16/2020-Total Table 3+ is calculated as the sum of 17 compounds
-Where duplicate samples were collected, the highest value is used-Where timeseries samples were collected, the average is used-Samples were filtered with a 0.2 µm filter
-Acronyms:
ng/L: nanograms per liter
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Notes: \\projectsitesb.geosyntec.com@SSL\DavWWWRoot\5\FWConsentOrder\Shared Documents\11 - Paragraph 11\P11 Tasks\Quarterly Reports\06_October 2020\Appendix\Appendix B - Stormwater Grab Sampling\Figures and TabRainfall Intensity on 3/5/2020 at USGS station 02105500
Chemours Fayetteville Works, North Carolina
Stormwater samples collected between 10:45 AM and 3:30 PM on March 5, 2020Rainfall data obtained from USGS National Water Information System due to power outage onsite
Figure
B7
Raleigh December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
\\projectsitesb.geosyntec.com@SSL\DavWWWRoot\5\FWConsentOrder\Shared Documents\11 - Paragraph 11\P11 Tasks\Quarterly Reports\06_October 2020\Appendix\Appendix B - Stormwater Grab Sampling\FiTargeted Surface Type Samples by Location
HFPO-DA, PFMOAA, and Total Table 3+ Concentrations
Chemours Fayetteville Works, North Carolina
Figure
B8
Raleigh December 2020
Legend
Miscellaneous InletOverhead PipingPavementPavement and Pervious/GravelPervious/GravelRoofRoof, Pavement, and Overhead PipingRoof, Pervious/Gravel, and PavementRoof,Pervious/Gravel, Pavement, and Overhead Piping
Notes:-Stormwater samples were collected 3/5/2020-Total Table 3+ is calculated as the sum of 17 compounds*Due to a high level of visible sediment in the samples at
location 68 and 85, the samples were filtered in the laboratory using a 0.45 um filter prior to analysis.
Acronyms:ng/L: nanograms per literDUP: duplicate sample
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Notes: \\projectsitesb.geosyntec.com@SSL\DavWWWRoot\5\FWConsentOrder\Shared Documents\11 - Paragraph 11\P11 Tasks\Quarterly Reports\06_October 2020\Appendix\Appendix B - Stormwater Grab Sampling\FiTargeted Surface Type Samples by Source Area Type
HFPO-DA, PFMOAA, and Total Table 3+ Results
Chemours Fayetteville Works, North Carolina
-Stormwater samples were collected 3/5/2020-Total Table 3+ is calculated as the sum of 17 compounds
-Where duplicate samples were collected, the highest value was used-Results from locations 68 and 85 have been omitted from the figure. Due to a high level of visiblesediment in the samples at location 68 and 85, the samples were filtered in the laboratory using a
0.45 um filter prior to analysis.
Acronyms:ng/L: nanograms per liter
Figure
B9
Raleigh December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
\\projectsitesb.geosyntec.com@SSL\DavWWWRoot\5\FWConsentOrder\Shared Documents\11 - Paragraph 11\P11 Tasks\Quarterly Reports\06_October 2020\Appendix\Appendix B - Stormwater Grab Sampling\Fi Legend Dissolved vs. Total
HFPO-DA, PFMOAA, and Total Table 3+ Concentrations
Chemours Fayetteville Works, North Carolina
Figure
B10
Raleigh December 2020
TotalDissolved
Notes:-Stormwater samples were collected 3/5/2020-Total Table 3+ is calculated as the sum of 17 compounds
Acronyms:ng/L: nanograms per literDUP: duplicate sample
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
15 December 2020
ATTACHMENT A: Field Forms
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Title Combined_Location_ID sampling_date sampling_time samplers
55 10-16-2019 09:48 CHARLES PACE
52 10-16-2019 10:10 CHARLES PACE
10 10-16-2019 10:30 CHARLES PACE
40 10-16-2019 10:42 CHARLES PACE
41 10-16-2019 10:45 CHARLES PACE
2 10-16-2019 11:00 CHARLES PACE
25 10-16-2019 11:05 CHARLES PACE
3 10-16-2019 11:10 CHARLES PACE
27 10-16-2019 11:25 CHARLES PACE
28 10-16-2019 11:30 CHARLES PACE
5 10-16-2019 11:50 CHARLES PACE
30 10-16-2019 11:55 CHARLES PACE
31 10-16-2019 12:10 CHARLES PACE
32 10-16-2019 12:20 CHARLES PACE
34 10-16-2019 12:45 CHARLES PACE
33 10-16-2019 12:40 CHARLES PACE
54 10-16-2019 12:55 CHARLES PACE
36 10-16-2019 13:05 CHARLES PACE
13 10-16-2019 13:20 CHARLES PACE
37 10-16-2019 13:27 CHARLES PACE
39 10-16-2019 13:50 BRANDON WEIDNER
38 10-16-2019 13:35 BRANDON WEIDNER
35 10-16-2019 13:20 BRANDON WEIDNER
42 10-16-2019 10:26 BRANDON WEIDNER
35 10-16-2019 10:55 BRANDON WEIDNER
38 10-16-2019 11:13 BRANDON WEIDNER
39 10-16-2019 11:23 BRANDON WEIDNER
42 10-16-2019 11:50 BRANDON WEIDNER
35 10-16-2019 12:10 BRANDON WEIDNER
38 10-16-2019 12:25 BRANDON WEIDNER
39 10-16-2019 12:35 BRANDON WEIDNER
42 10-16-2019 12:45 BRANDON WEIDNER
Attachment A-1
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
additional sky precip air_temp wind sampling_method Sample_pH
Cloudy Rain 65 5 Grab 4.95
Cloudy Rain 68 5 Grab 5.36
Cloudy Rain 66 6 Grab 5.68
Cloudy Rain 66 6 Grab 5.86
Cloudy Rain 66 6 Grab 5.9
Cloudy Rain 66 6 Grab 6.09
Cloudy Rain 67 6 Grab 5.97
Cloudy Rain 67 6 Grab 6
Cloudy Rain 67 6 Grab 6.07
Cloudy Rain 67 6 Grab 6.07
Cloudy Rain 69 6 Grab 6.36
Cloudy Rain 69 6 Grab 5.85
Cloudy Rain 70 8 Grab 5.83
Cloudy Rain 70 8 Grab 6.26
Cloudy None 70 8 Grab 6.34
Cloudy None 70 8 Grab 6.25
Cloudy None 70 8 Grab 6.55
Cloudy None 70 8 Grab 6.57
Cloudy Rain 70 8 Grab 6.69
Cloudy None 72 9 Grab 6.43
Ed M.Cloudy None 71 5 Grab 6.78
Cloudy None 71 3 Grab 6.07
Cloudy None 72 2 Grab 6.71
Ed M.Cloudy Rain 66 3 Grab 5.4
Ed M.Cloudy None 67 6 Grab 5.81
Ed M.Cloudy Rain 68 3 Grab 5.91
Ed M.Cloudy Rain 68 3 Grab 6.28
Ed M.Cloudy None 69 5 Grab 6.55
Cloudy None 70 5 Grab 6.52
Cloudy None 70 3 Grab 6.46
Ed M.Cloudy None 70 4 Grab 6.71
Cloudy None Grab 6.72
Attachment A-1
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Sample_TDS Sample_Tubidity obs_spl_location obs_misc
0.066 255
0.023 608
0.037 53.5 Taken further up from road because of vac truck
0.057 11.3
0.049 80
0.027 100
0.016 16.2
0.011 136
0.012 1000 Great deal of leaf litter in ditch
0.014 105
0.016 15.4
0.024 151
0.013 154 MS/REP/DUP
0.019 1000 MS REP DUP
0.032 890
0.026 822
0.023 1000
0.036 12.1
0.017 9.5
0.05 1000
0.047 0.8 TS3
0.026 0.2 TS3
0.025 86.4 TS3
0.048 16.3 Took from larger white plastic pipe (East side)
0.024 66.4 Taken from opposing side of 35
0.036 14.4
0.061 1.8
0.023 13.2 TS2
0.023 52.4 TS2
0.032 0 TS2
0.049 7.2 TS2
0.03 7 TS3
Attachment A-1
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Item Type Path
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Item sites/Field_Tablet_Monitoring_Data/Lists/Fayetteville_Stormwater_Sampling_Data
Attachment A-1
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.72 0.15 7.99
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2025 Sampling Time: 11:20
STORMWATER SAMPLING RECORD
Chemours Fayetteville 42
Project Manager: Tracy OvbeyLUKE TART|OTHER, Danielle Delgado
Temperature (F):
Precipitation:
Sky:
Wind (mph)
liters per minute
52.00
Cloudy
Rain
GrabSampling Method:1.8
Photo at Sample Location
4.00
Flow from pipe
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.85 0.13 126.35
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 11:30
STORMWATER SAMPLING RECORD
Chemours Fayetteville 43
Project Manager: Tracy OvbeyLUKE TART|OTHER, Danielle Delgado
Temperature (F):
Precipitation:
Sky:
Wind (mph)
liters per minute
52.00
Cloudy
Rain
GrabSampling Method:2.1
Photo at Sample Location
4.00
Flow from pipe
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.71 0.00 1.83
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 12:45
STORMWATER SAMPLING RECORD
Chemours Fayetteville 58
Project Manager: Tracy OvbeyBRANDON WEIDNER|CHARLES PACE,
Temperature (F):
Precipitation:
Sky:
Wind (mph)
50.00
Cloudy
Rain
GrabSampling Method:
Photo at Sample Location
4.00
250ml/6.56s
Sample from roof of building
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.60 0.03 33.56
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 12:50
STORMWATER SAMPLING RECORD
Chemours Fayetteville 59
Project Manager: Tracy OvbeyBRANDON WEIDNER|CHARLES PACE,
Temperature (F):
Precipitation:
Sky:
Wind (mph)
50.00
Cloudy
Rain
GrabSampling Method:
Photo at Sample Location
4.00
250ml/10.45s flow rate
Sample, most likely from pavement
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.66 0.02 1.72
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 12:55
STORMWATER SAMPLING RECORD
Chemours Fayetteville 60
Project Manager: Tracy OvbeyBRANDON WEIDNER|CHARLES PACE,
Temperature (F):
Precipitation:
Sky:
Wind (mph)
50.00
Cloudy
Rain
GrabSampling Method:
Photo at Sample Location
4.00
250ml/12s flow rate
Sample coming from roof of building
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.83 0.11 139.87
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 11:15
STORMWATER SAMPLING RECORD
Chemours Fayetteville 61
Project Manager: Tracy OvbeyBRANDON WEIDNER|CHARLES PACE,
Temperature (F):
Precipitation:
Sky:
Wind (mph)
51.00
Cloudy
Rain
GrabSampling Method:
Photo at Sample Location
2.00
Sample taken from beneath grate. Flow coming from gravel/sand/grass field to the NW
Couldn’t get flow to multiple entry locations into grate.
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
8.39 0.12 49.77
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 15:00
STORMWATER SAMPLING RECORD
Chemours Fayetteville 62
Project Manager: Tracy OvbeyLUKE TART|OTHER, Danielle Delgado
Temperature (F):
Precipitation:
Sky:
Wind (mph)
liters per minute
50.00
Cloudy
Rain
GrabSampling Method:0.3
Photo at Sample Location
4.00
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.99 0.23 189.88
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 10:45
STORMWATER SAMPLING RECORD
Chemours Fayetteville 63
Project Manager: Tracy OvbeyBRANDON WEIDNER|CHARLES PACE,
Temperature (F):
Precipitation:
Sky:
Wind (mph)
52.00
Cloudy
Rain
GrabSampling Method:
Photo at Sample Location
6.00
Collected sample from water flowing into drainage ditch. Water flowing from gravel area to the north. Could not
get flow rate.
Sample from imperious surface
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.22 0.01 4.34
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 13:45
STORMWATER SAMPLING RECORD
Chemours Fayetteville 63A
Project Manager: Tracy OvbeyBRANDON WEIDNER|CHARLES PACE,
Temperature (F):
Precipitation:
Sky:
Wind (mph)
49.00
Cloudy
Rain
GrabSampling Method:
Photo at Sample Location
8.00
250ml/4.79s flow rate
Sample coming from gravel area west of pipe, sampled from pipe.
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.28 0.02 38.70
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 13:20
STORMWATER SAMPLING RECORD
Chemours Fayetteville 64
Project Manager: Tracy OvbeyBRANDON WEIDNER|CHARLES PACE,
Temperature (F):
Precipitation:
Sky:
Wind (mph)
liters per minute
51.00
Cloudy
Rain
GrabSampling Method:3
Photo at Sample Location
8.00
Sample flowing from gravel area south of colvert
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.52 0.04 338.00
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 13:30
STORMWATER SAMPLING RECORD
Chemours Fayetteville 65
Project Manager: Tracy OvbeyBRANDON WEIDNER|CHARLES PACE,
Temperature (F):
Precipitation:
Sky:
Wind (mph)
51.00
Cloudy
Rain
GrabSampling Method:
Photo at Sample Location
8.00
Sample coming from gravel area south of colvert and also from pavement (road) west of location
Rate: can’t get flow rate due to rocks
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.08 0.01 1.64
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 13:50
STORMWATER SAMPLING RECORD
Chemours Fayetteville 66
Project Manager: Tracy OvbeyBRANDON WEIDNER|CHARLES PACE,
Temperature (F):
Precipitation:
Sky:
Wind (mph)
49.00
Cloudy
Rain
GrabSampling Method:
Photo at Sample Location
7.00
Sample from roof of building
250ml/1 min
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.03 0.02 1.61
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 14:00
STORMWATER SAMPLING RECORD
Chemours Fayetteville 67
Project Manager: Tracy OvbeyBRANDON WEIDNER|CHARLES PACE,
Temperature (F):
Precipitation:
Sky:
Wind (mph)
49.00
Cloudy
Rain
GrabSampling Method:
Photo at Sample Location
7.00
Sample from roof
Flow rate: 250ml/26.34s
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
6.70 0.04 420.72
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 14:30
STORMWATER SAMPLING RECORD
Chemours Fayetteville 68
Project Manager: Tracy OvbeyBRANDON WEIDNER|CHARLES PACE,
Temperature (F):
Precipitation:
Sky:
Wind (mph)
49.00
Cloudy
Rain
GrabSampling Method:
Photo at Sample Location
7.00
Sample coming from pavement to the NW of grate
Unable to get flow rate due to multiple entry’s into grate
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.69 0.02 23.73
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 14:40
STORMWATER SAMPLING RECORD
Chemours Fayetteville 69
Project Manager: Tracy OvbeyBRANDON WEIDNER|CHARLES PACE,
Temperature (F):
Precipitation:
Sky:
Wind (mph)
51.00
Cloudy
Rain
GrabSampling Method:
Photo at Sample Location
7.00
No flow due to multiple entry ways
Sample from pavement coming from road and processing area
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.55 0.05 32.54
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 14:50
STORMWATER SAMPLING RECORD
Chemours Fayetteville 70
Project Manager: Tracy OvbeyBRANDON WEIDNER|CHARLES PACE,
Temperature (F):
Precipitation:
Sky:
Wind (mph)
51.00
Cloudy
Rain
GrabSampling Method:
Photo at Sample Location
7.00
No flow rate
Sample coming from runoff from gravel area
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.85 0.13 163.16
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 13:20
STORMWATER SAMPLING RECORD
Chemours Fayetteville 71
Project Manager: Tracy OvbeyLUKE TART|OTHER, Danielle Delgado
Temperature (F):
Precipitation:
Sky:
Wind (mph)
liters per minute
52.00
Cloudy
Rain
GrabSampling Method:0.3
Photo at Sample Location
4.00
Sample taken by dip rod. Flow coming from crack in the concrete, seeping from puddles around grate
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.79 0.10 2.57
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 11:10
STORMWATER SAMPLING RECORD
Chemours Fayetteville 72
Project Manager: Tracy OvbeyLUKE TART|OTHER,
Temperature (F):
Precipitation:
Sky:
Wind (mph)
liters per minute
50.00
Cloudy
Rain
GrabSampling Method:0.2
Photo at Sample Location
3.00
Flow from roof
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.76 0.06 0.54
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 11:00
STORMWATER SAMPLING RECORD
Chemours Fayetteville 73
Project Manager: Tracy OvbeyLUKE TART|OTHER, Danielle Delgado
Temperature (F):
Precipitation:
Sky:
Wind (mph)
liters per minute
51.00
Cloudy
Rain
GrabSampling Method:0.3
Photo at Sample Location
3.00
Flow from roof
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.54 0.06 0.30
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 14:30
STORMWATER SAMPLING RECORD
Chemours Fayetteville 75
Project Manager: Tracy OvbeyLUKE TART|OTHER, Danielle Delgado
Temperature (F):
Precipitation:
Sky:
Wind (mph)
liters per minute
50.00
Cloudy
Rain
GrabSampling Method:0.2
Photo at Sample Location
6.00
Water coming from room
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.69 0.16 4.51
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 14:00
STORMWATER SAMPLING RECORD
Chemours Fayetteville 76
Project Manager: Tracy OvbeyLUKE TART|OTHER, Danielle Delgado
Temperature (F):
Precipitation:
Sky:
Wind (mph)
liters per minute
50.00
Cloudy
Rain
GrabSampling Method:0.2
Photo at Sample Location
6.00
Flow from roof top
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.52 0.04 29.75
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 12:50
STORMWATER SAMPLING RECORD
Chemours Fayetteville 77
Project Manager: Tracy OvbeyLUKE TART|OTHER, Danielle Delgado
Temperature (F):
Precipitation:
Sky:
Wind (mph)
liters per minute
53.00
Cloudy
Rain
GrabSampling Method:0.5
Photo at Sample Location
6.00
Flow coming from road run off into drain
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.25 0.05 1.29
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 12:40
STORMWATER SAMPLING RECORD
Chemours Fayetteville 78
Project Manager: Tracy OvbeyLUKE TART|OTHER, Danielle Delgado
Temperature (F):
Precipitation:
Sky:
Wind (mph)
liters per minute
52.00
Cloudy
Rain
GrabSampling Method:0.1
Photo at Sample Location
5.00
Flow estimated by volume in tray after 30 seconds, sample taken from downspout from steel tray attached below
overhead pipes. Sample taken from HDPE tray seen in photo.
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.68 0.05 28.28
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 11:40
STORMWATER SAMPLING RECORD
Chemours Fayetteville 79
Project Manager: Tracy OvbeyBRANDON WEIDNER|CHARLES PACE,
Temperature (F):
Precipitation:
Sky:
Wind (mph)
51.00
Cloudy
Rain
GrabSampling Method:
Photo at Sample Location
5.00
Sample coming from location 79. Under from trailer and into grate. Unclear if coming from pipe or from pool
after the pipe.
Couldn’t get flow due to multiple entry points
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
8.04 0.07 99.64
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 11:45
STORMWATER SAMPLING RECORD
Chemours Fayetteville 80
Project Manager: Tracy OvbeyBRANDON WEIDNER|CHARLES PACE,
Temperature (F):
Precipitation:
Sky:
Wind (mph)
50.00
Cloudy
Rain
GrabSampling Method:
Photo at Sample Location
5.00
Sample coming from imperious surface. Loading/unloading area at IXM.
Couldn’t get flow due to multiple entrys into grate
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.27 0.07 15.24
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 14:15
STORMWATER SAMPLING RECORD
Chemours Fayetteville 83
Project Manager: Tracy OvbeyKEN STUART,
Temperature (F):
Precipitation:
Sky:
Wind (mph)
liters per minute
49.00
Cloudy
Rain
GrabSampling Method:1.1
Photo at Sample Location
8.00
drain from ppa lab gutter, closest to ppa
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.13 0.05 15.97
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 12:20
STORMWATER SAMPLING RECORD
Chemours Fayetteville 84
Project Manager: Tracy OvbeyKEN STUART,
Temperature (F):
Precipitation:
Sky:
Wind (mph)
liters per minute
50.00
Cloudy
Rain
GrabSampling Method:1.7
Photo at Sample Location
8.00
sentry glass sheet flow sampled with dip rod at pipe in ditch, located adjacent to ppa
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
6.53 0.01 27.82
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 15:30
STORMWATER SAMPLING RECORD
Chemours Fayetteville 85
Project Manager: Tracy OvbeyKEN STUART,
Temperature (F):
Precipitation:
Sky:
Wind (mph)
liters per minute
49.00
Cloudy
Rain
GrabSampling Method:0.2
Photo at Sample Location
7.00
location flows into wood lined ditch, very lt rain
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
flow through the gravel
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
6.87 0.10 5.82
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 13:43
STORMWATER SAMPLING RECORD
Chemours Fayetteville 86
Project Manager: Tracy OvbeyKEN STUART,
Temperature (F):
Precipitation:
Sky:
Wind (mph)
liters per minute
50.00
Cloudy
Rain
GrabSampling Method:0.1
Photo at Sample Location
7.00
pipe coming from trailer roof at ppa. The pipe is the one closest to ppa not the entrance
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
flow was 0.061 liter per minute
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
7.59 0.07 4.13
Observation of Sample Location
Miscellaneous Observations
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 11:40
STORMWATER SAMPLING RECORD
Chemours Fayetteville 87
Project Manager: Tracy OvbeyKEN STUART, Ryan Gableman
Temperature (F):
Precipitation:
Sky:
Wind (mph)
liters per minute
52.00
Cloudy
Rain
GrabSampling Method:13.2
Photo at Sample Location
7.00
Roof drain pipe drain from Sentry glass facing PPA
Flow Rate:
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
coordinates later
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Site Name:Location ID:
Samplers:
pH
Total
Dissolved
Solids Turbidity
mg/L NTU
6.87 0.00 4.11
Observation of Sample Location
Miscellaneous Observations
49.00
Cloudy
Rain
GrabSampling Method:
Photo at Sample Location
8.00
second to last drainage pipe from roof at sentry glass, behind towards main gate
Flow Rate:
Temperature (F):
Precipitation:
Sky:
Wind (mph)
STORMWATER SAMPLING RECORD
Chemours Fayetteville 88
Project Manager: Tracy OvbeyKEN STUART, Ryan Gableman
WEATHER CONDITIONS
Sampling Date: 03-05-2020 Sampling Time: 15:06
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
could not measure flow, likely about 5 liters per minute
Attachment A-2
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672

16 December 2020

ATTACHMENT B: Table 3+ Analytical Results

DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE B1
ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC P.C.
Location ID LOC10 LOC13 LOC2 LOC25 LOC27 LOC28 LOC3 LOC30 LOC31 LOC31 LOC32
Field Sample ID ASTW-LOC10-101619 ASTW-LOC13-101619 ASTW-LOC2-101619 ASTW-LOC25-101619 ASTW-LOC27-101619 ASTW-LOC28-101619 ASTW-LOC3-101619 ASTW-LOC30-101619 ASTW-LOC31-101619 ASTW-LOC31-101619-D ASTW-LOC32-101619
Sample Date 10/16/2019 10/16/2019 10/16/2019 10/16/2019 10/16/2019 10/16/2019 10/16/2019 10/16/2019 10/16/2019 10/16/2019 10/16/2019
QA/QC DUP
Sample Matrix LIQUID Liquid Liquid Liquid Liquid Liquid Liquid Liquid Liquid Liquid LiquidSample Delivery Group (SDG)320-55408-1 320-55403-1 320-55413-1 320-55413-1 320-55413-1 320-55413-1 320-55413-1 320-55413-1 320-55401-1 320-55401-1 320-55401-1
Lab Sample ID 320-55408-2 320-55403-5 320-55413-2 320-55413-3 320-55413-4 320-55413-5 320-55413-1 320-55413-6 320-55401-2 320-55401-3 320-55401-4
Total Table 3+ SOP (ng/L)
Hfpo Dimer Acid 98,000 760 1,500 820 1,100 480 2,300 4,900 340 330 2,900 J
PFMOAA 22,000 150 J 56 J 16 150 37 250 J 2,400 48 J 51 550
PFO2HxA 25,000 350 230 54 230 99 170 2,000 70 68 690
PFO3OA 14,000 160 43 16 170 J 27 97 2,600 16 16 610
PFO4DA 12,000 150 35 9.5 260 35 120 2,600 15 14 800
PFO5DA 9,700 96 J 18 J 5.9 280 J 33 48 1,500 15 15 630
PMPA 7,000 1,100 450 320 650 500 J 290 2,900 550 530 840
PEPA 3,400 440 160 57 400 210 110 1,300 260 260 390
PS Acid 2,900 68 3.7 <2 53 4.6 11 180 4.1 4.4 9,600Hydro-PS Acid 9,300 52 18 4.4 47 11 22 450 J 14 14 40,000
R-PSDA 5,200 270 J 120 J 41 J 500 J 69 J 170 J 1,100 53 J 56 J 490Hydrolyzed PSDA 4,300 J 350 J 22 J 9.2 J 170 J 29 J 110 J 1,900 15 J 16 J 3,300
R-PSDCA 380 <2 <2 <2 4.6 <2 <2 15 <2 <2 76
NVHOS 4,500 25 7.3 3.6 18 7.2 15 190 5.1 5 220
EVE Acid 5,700 55 14 8.2 32 7.9 19 150 8.4 8.5 63
Hydro-EVE Acid 3,900 63 17 9.5 68 9.2 39 490 13 13 110
R-EVE 2,700 200 J 96 J 43 J 150 J 56 J 110 J 1,000 95 J 98 J 84
PES <23 <2 <2 <2 <2 <2 <2 <2 <2 <2 <23
PFECA B <30 <2 <2 <2 <2 <2 <2 <2 <2 <2 <30
PFECA-G <20 <2 <2 UJ <2 UJ <2 UJ <2 <2 UJ <2 <2 <2 <20
Total Table 3+ (17 compounds)220,000 3,500 2,600 1,300 3,500 1,500 3,500 22,000 1,400 1,300 57,000
Total Table 3+ (20 compounds)230,000 4,300 2,800 1,400 4,300 1,600 3,900 26,000 1,500 1,500 61,000
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate <18 <2 <2 <2 5.6 <2 <3.5 <8.8 <2 <2 <3.6
11Cl-PF3OUdS <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <6.1
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)<190 <20 <20 <20 <20 <20 <36 <93 <20 <20 <38
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)<20 <49 <48 <24 <24 <24 <95 <240 <24 <25 <100
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol <2 --------------<2 <2 <2
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol <4 --------------<4 <4 <4
6:2 Fluorotelomer sulfonate <190 <20 <20 <20 <20 <20 <36 <93 <20 <20 <38
9Cl-PF3ONS <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <4.6
ADONA <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <3.6NaDONA<2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <3.6
N-ethyl perfluorooctane sulfonamidoacetic acid <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <36
N-ethylperfluoro-1-octanesulfonamide <2 --------------<2 <2 <2N-methyl perfluoro-1-octanesulfonamide <2 --------------<2 <2 <2
N-methyl perfluorooctane sulfonamidoacetic acid <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <59
Perfluorobutane Sulfonic Acid 2.2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2
Perfluorobutanoic Acid 980 65 17 7.1 41 19 9 72 10 10 48
Perfluorodecane Sulfonic Acid <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <6.1
Perfluorodecanoic Acid 7.4 <2 <2 <2 6.8 3.1 <2 <2 <2 <2 3.6 J
Perfluorododecane sulfonic acid (PFDoS)<2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <8.6
Perfluorododecanoic Acid 3.3 <2 <2 <2 6.1 <2 <2 <2 <2 <2 2.2
Perfluoroheptane sulfonic acid (PFHpS)<2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <3.6
Perfluoroheptanoic Acid 130 4.2 5.2 <2 12 2.8 8.5 23 3.8 4.1 110 J
Perfluorohexadecanoic acid (PFHxDA)<2 <2 <2 <2 2.3 <2 <2 <2 <2 <2 <2Perfluorohexane Sulfonic Acid <2 <2 <2 <2 12 <2 <2 <2 <2 <2 <2
Perfluorohexanoic Acid 290 6.6 5.6 2.2 16 5.4 6.6 12 4 3.9 32
Perfluorononanesulfonic acid <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <3.1
Perfluorononanoic Acid 33 3 <2 <2 4 <2 <2 5.9 <2 <2 21
Perfluorooctadecanoic acid <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2
Perfluorooctane Sulfonamide <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2
Perfluoropentane sulfonic acid (PFPeS)<2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2
Perfluoropentanoic Acid 1,000 12 7.3 3.3 24 7.9 7.4 39 4.7 5.1 250
Perfluorotetradecanoic Acid 2.3 <2 <2 <2 8.5 <2 <2 <2 <2 <2 <2
Perfluorotridecanoic Acid 4.1 <2 <2 <2 7.5 <2 <2 <2 <2 <2 2.5
Perfluoroundecanoic Acid 11 3 <2 <2 3.7 2.4 <2 <2 <2 <2 <21PFOA978.4 31 15 59 11 81 130 35 36 5,700 J
PFOS 3.9 2.2 <2 <2 62 2.7 3.8 <2 <2 <2 <11
Page 1 of 4 October 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE B1
ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC P.C.
Location ID
Field Sample ID
Sample Date
QA/QC
Sample Matrix
Sample Delivery Group (SDG)
Lab Sample ID
Total Table 3+ SOP (ng/L)
Hfpo Dimer Acid
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)
Total Table 3+ (20 compounds)
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
11Cl-PF3OUdS
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
9Cl-PF3ONS
ADONANaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamideN-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic AcidPFOA
PFOS
LOC32 LOC33 LOC34 LOC35 LOC35 LOC35 LOC36 LOC37 LOC38 LOC38 LOC38
ASTW-LOC32-101619-D ASTW-LOC33-101619 ASTW-LOC34-101619 ASTW-LOC35-1-101619 ASTW-LOC35-2-101619 ASTW-LOC35-3-101619 ASTW-LOC36-101619 ASTW-LOC37-101619 ASTW-LOC38-1-101619 ASTW-LOC38-2-101619 ASTW-LOC38-3-101619
10/16/2019 10/16/2019 10/16/2019 10/16/2019 10/16/2019 10/16/2019 10/16/2019 10/16/2019 10/16/2019 10/16/2019 10/16/2019
DUP
Liquid Liquid Liquid Liquid Liquid LIQUID Liquid Liquid Liquid LIQUID LIQUID320-55401-1 320-55403-1 320-55403-1 320-55416-1 320-55416-1 320-55411-1 320-55403-1 320-55403-1 320-55416-1 320-55411-1 320-55411-1
320-55401-5 320-55403-1 320-55403-2 320-55416-2 320-55416-6 320-55411-4 320-55403-3 320-55403-4 320-55416-3 320-55411-1 320-55411-5
2,300 J 3,800 1,900 1,300 1,400 1,600 2,100 14,000 1,700 2,200 1,800
600 280 500 J 380 J 330 610 J 190 J 3,100 290 640 510700530590 J 250 230 320 J 320 3,100 500 710 610
620 200 230 J 120 91 130 J 72 6,100 330 480 400
860 260 420 150 99 140 J 140 11,000 420 560 510800410 J 1,300 200 J 120 170 J 150 J 5,200 320 560 470
870 1,400 1,700 970 860 910 J 1,200 8,500 1,900 1,900 1,700
380 560 700 J 500 J 420 500 J 610 J 4,000 870 830 770
11,000 110 160 J 91 110 160 J 6.9 1,400 68 860 78042,000 360 890 280 J 230 450 J 170 1,900 130 210 170
500 790 J 1,300 650 J 690 J 170 J 330 J 490 410 J 280 J 210 J3,600 280 J 1,200 1,200 1,600 930 J 33 J 1,700 750 J 1,100 850
76 18 21 5.2 5 9.1 J 2.6 44 4.1 6.6 5.3
230 67 130 85 97 160 J 26 200 32 40 336169140383347 J 14 260 57 160 130
110 110 160 52 40 53 J 46 5,700 93 110 85
80 340 J 540 230 J 180 J 56 J 210 J 620 310 J 140 110
<23 <2 <2 <2 <2 <4.6 UJ <2 <4.6 <2 <2.3 <2.3
<30 <2 <2 <2 <2 <6 UJ 2.3 <6 <2 <3 <3
<20 <2 <2 UJ <2 UJ <2 <4.1 UJ <2 <4.1 <2 <2 <2
61,000 8,200 8,800 4,400 4,100 5,300 5,000 65,000 6,700 9,300 8,000
65,000 9,600 12,000 6,500 6,500 6,400 5,600 67,000 8,200 11,000 9,100
<3.7 <3.5 <3.6 <2 <2 <2 <2 <2 <2 <3.4 <2
<6.2 <5.9 <2 <2 <2 <2 <2 <2 <2 <2 <2
<39 <37 <38 <20 <20 <20 <20 <20 <20 <36 <20
<100 <96 <98 <49 <50 <48 <49 <500 <48 <94 <48
<2 --------<2 ------<2 <2
<4 --------<4 ------<4 <4
<39 <20 <38 <20 <20 <20 <20 <20 <20 <36 <20
<4.7 <4.5 <2 <2 <2 <2 <2 <2 <2 <2 <2
<3.7 <3.5 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1<3.7 <3.5 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1
<37 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20
<2 --------<2 ------<2 <2<2 --------<2 ------<2 <2
<20 <58 <20 <20 <20 <20 <20 <20 <20 <20 <20
<2 <3.7 <2 <2 <2 <2 <2 <2 <2 <2 <2477112043375640200120120110
<6.2 <5.9 <2 <2 <2 <2 <2 <2 <2 <2 <2
<6 7.8 7.8 2.8 2.3 3.9 <2 3.3 <2 <2 <2
<8.7 <8.3 <2 <2 <2 <2 <2 <2 <2 <2 <2
<2 <10 2.7 <2 <2 <2 <2 <2 2.7 <2 <2
<3.7 <3.5 <2 <2 <2 <2 <2 <2 <2 <2 <2
88 J 120 21 5.6 5.4 6.6 4.1 63 6.2 7.1 6.4
<2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2<2 <3.2 2.7 <2 <2 <2 <2 2.7 <2 <2 <2
22 40 15 9.8 9.6 14 4.5 29 9.4 8.9 8.7
<3.1 <3 <2 <2 <2 <2 <2 <2 <2 <2 <21910123.5 2.6 3.7 2.9 20 3.1 3.5 3.4
<2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2
<2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2
<2 <5.6 <2 <2 <2 <2 <2 <2 <2 <2 <2
230 73 85 18 15 21 21 75 19 21 19
<2 <2 <2 <2 <2 <2 <2 <2 3.1 <2 <2
2 <24 2.7 <2 <2 <2 <2 <2 2.4 <2 <2
<21 <20 11 3.9 2.6 4 3.2 3.1 2.7 <2 <24,100 J 7,300 940 36 110 63 8 19 9.7 9.9 10
17 13 30 3.1 2.7 2.9 <2 3.9 3.5 2.5 2.4
Page 2 of 4 October 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE B1
ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC P.C.
Location ID
Field Sample ID
Sample Date
QA/QC
Sample Matrix
Sample Delivery Group (SDG)
Lab Sample ID
Total Table 3+ SOP (ng/L)
Hfpo Dimer Acid
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)
Total Table 3+ (20 compounds)
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
11Cl-PF3OUdS
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
9Cl-PF3ONS
ADONANaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamideN-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic AcidPFOA
PFOS
LOC39 LOC39 LOC39 LOC40 LOC41 LOC42 LOC42 LOC42 LOC5 LOC52 LOC54
ASTW-LOC39-1-101619 ASTW-LOC39-2-101619 ASTW-LOC39-3-101619 ASTW-LOC40-101619 ASTW-LOC41-101619 ASTW-LOC42-1-101619 ASTW-LOC42-2-101619 ASTW-LOC42-3-101619 ASTW-LOC5-101619 ASTW-LOC52-101619 ASTW-LOC54-101619
10/16/2019 10/16/2019 10/16/2019 10/16/2019 10/16/2019 10/16/2019 10/16/2019 10/16/2019 10/16/2019 10/16/2019 10/16/2019
Liquid LIQUID LIQUID Liquid LIQUID Liquid Liquid LIQUID Liquid LIQUID LIQUID320-55416-1 320-55411-1 320-55411-1 320-55403-1 320-55408-1 320-55416-1 320-55416-1 320-55411-1 320-55401-1 320-55408-1 320-55408-1
320-55416-4 320-55411-2 320-55411-6 320-55403-6 320-55408-1 320-55416-1 320-55416-5 320-55411-3 320-55401-1 320-55408-3 320-55408-4
420 390 370 5,900 5,800 45,000 33,000 35,000 180 23,000 80,000
57 J 54 48 350 J 410 220,000 130,000 190,000 <5 3,100 650150130130310 J 280 68,000 41,000 53,000 39 6,600 2,300
52 41 43 180 180 48,000 30,000 40,000 7 2,200 1,500
37 28 29 240 J 230 46,000 30,000 37,000 7.2 1,200 1,900142019110 J 130 26,000 16,000 22,000 13 1,200 3,200
490 510 500 2,800 2,500 6,900 4,400 5,100 230 4,300 2,200
190 180 190 1,100 1,000 8,500 7,600 8,100 79 1,800 950
2.8 3.4 3.3 58 54 2,700 1,300 1,900 2.4 29,000 320 J22222389805,300 3,600 4,300 7.6 3,900 1,500
120 J 75 J 83 J 160 J 55 1,500 1,500 2,400 19 J 5,300 3,10029 J 22 J 20 J 300 J 110 J 7,600 4,700 7,000 10 J 43,000 J 950 J
<2 <2 <2 2.1 <3.1 170 160 220 <2 71 110
7.9 7.4 7.8 39 J 43 2,600 1,900 2,400 3.1 1,800 360131412445514,000 15,000 16,000 11 5,600 520
23 22 21 120 J 130 33,000 30,000 33,000 8.5 1,200 320
69 J 44 J 41 J 210 J 80 J 2,800 2,300 2,500 31 J 2,100 1,200
<2 <2 <2 <2 <9.2 <92 <46 <46 <2 <46 26
<2 <2 <2 <2 <12 <120 <60 <60 <2 <60 <12
<2 <2 <2 <2 <8.2 <82 <41 <41 <2 <41 <8.2
1,500 1,400 1,400 11,000 11,000 530,000 340,000 450,000 590 85,000 96,000
1,700 1,600 1,500 12,000 11,000 540,000 350,000 460,000 650 140,000 100,000
<2 <2 <2 <9.1 <8.6 <18 <19 <17 <2 <18 <2
<2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2
<20 <20 <20 <96 <91 <190 <200 <180 <20 <190 <20
<25 <23 <20 <250 <240 <20 <20 <20 <20 <490 <2,600
--<2 <2 --<2 ----<2 <2 <2 <4.3
--<4 <4 --<4 ----<4 <4 <4 <7
<20 <20 <20 <96 <91 <190 <200 <180 <20 <20 <20
<2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2
<2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1<2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20
--<2 <2 --<2 ----<2 <2 <2 <4.4--<2 <2 --<2 ----<2 <2 <2 <2.2
<20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20
<2 <2 <2 4.3 3.4 <2 <2 <2 2.4 <2 <241404148473402103005.3 84 930
<2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2
2.6 2.3 2.1 <2 <2 9.1 6.2 7.8 <2 7.9 33
<2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2.3
<2 2.4 <2 <2 2.7 6.9 5.3 8.9 <2 29 17
<2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2
25 17 17 22 19 270 150 240 <2 13 220
<2 <2 <2 <2 <2 3.4 3.3 2.8 <2 4.7 <4.52.2 <2 2 5.6 4.5 <2 <2 <2 <2 <2 5.4
29 20 21 31 28 61 38 53 2 14 190
<2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <24.2 4.3 3.7 2.7 2.4 160 110 140 <2 9.4 120
<2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2.3
<2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2
<2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2
29 20 20 38 34 430 280 370 2.5 52 1,500
<2 <2 <2 <2 3.1 5.6 4.5 6.2 <2 25 14
<2 <2 <2 <2 3.5 9.6 9.8 22 <2 14 39
<2 2.1 <2 <2 <2 26 23 49 <2 9.9 3518141415153626329.2 31 9,000
13 11 11 10 11 <2 <2 <2 7.6 2.8 29
Page 3 of 4 October 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE B1
ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC P.C.
Location ID
Field Sample ID
Sample Date
QA/QC
Sample Matrix
Sample Delivery Group (SDG)
Lab Sample ID
Total Table 3+ SOP (ng/L)
Hfpo Dimer Acid
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS AcidHydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)
Total Table 3+ (20 compounds)
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
11Cl-PF3OUdS
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
9Cl-PF3ONS
ADONANaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamideN-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic AcidPFOA
PFOS
LOC55 EQBLK FBLK TB
ASTW-LOC55-101619 ASTW-EB-101619 ASTW-FB-101619 ASTW-TB-101619
10/16/2019 10/16/2019 10/16/2019 10/16/2019
Equipment Blank Field Blank Trip Blank
LIQUID LIQUID LIQUID LIQUID320-55408-1 320-55408-1 320-55408-1 320-55408-1
320-55408-5 320-55408-6 320-55408-8 320-55408-7
820 4.4 <4 <4
190 J <5 <5 <5130<2 <2 <2
43 <2 <2 <2
57 J <2 <2 <251<2 <2 <2
310 <10 <10 <10
99 <20 <20 <20 Notes:
5.6 <2 <2 <2 Bold - Analyte detected above associated reporting limit30<2 <2 <2 Abbreviations:
140 J <2 <2 <2 B - analyte detected in an associated blank40 J <2 <2 <2 EPA - Environmental Protection Agency
<2 <2 <2 <2 J - Analyte detected. Reported value may not be accurate or precise
11 J <2 <2 <2 ND - no Table 3+ analytes were detected above the associated reporting limits6<2 <2 <2 ng/L - nanograms per liter
15 <2 <2 <2 QA/QC - Quality assurance/ quality control
110 J <2 <2 <2 SDG - Sample Delivery Group
<2 <2 <2 <2 SOP - standard operating procedure
<2 <2 <2 <2 UJ – Analyte not detected. Reporting limit may not be accurate or precise.<2 <2 <2 <2 < - Analyte not detected above associated reporting limit.
1,800 4.4 ND ND
2,100 4.4 ND ND
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<48 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 <2.1 <2.1 <2.1<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<2 <2 <2 <2<2 <2 <2 <2
<20 <20 <20 <20
<2 <2 <2 <213<2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
6.5 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
2.3 <2 <2 <216<2 <2 <2
3.3 <2 <2 <2
Page 4 of 4 October 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE B2
ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC P.C.
Location ID LOC42 LOC43 LOC58 LOC58 LOC59 LOC60 LOC61
Field Sample ID ASTW-LOC-42-030520 ASTW-LOC-43-030520 ASTW-LOC-58-030520 ASTW-LOC-58-030520-Z ASTW-LOC-59-030520 ASTW-LOC-60-030520 ASTW-LOC-61-030520
Sample Date 3/5/2020 3/5/2020 3/5/2020 3/5/2020 3/5/2020 3/5/2020 3/5/2020
QA/QC
Sample Matrix Liquid Liquid Liquid Liquid Liquid Liquid Liquid
Filtered/Unfiltered Unfiltered Unfiltered Unfiltered Filtered Unfiltered Unfiltered Unfiltered
Sample Delivery Group (SDG)2091273 2091273 2091278/2095248//2095247 2091270 2091273 2091273 2091273
Lab Sample ID 1275304/1275304 1275308 1275413/1290740/1275250 1275312 1275316 1275320
Total Table 3+ SOP (ng/L)
Hfpo Dimer Acid 3,500 5,100 1,000 J 870 14,000 1,100 1,300
PFMOAA 110,000 77,000 33 J 33 7,600 9.1 480
PFO2HxA 4,500 4,200 130 J 130 1,900 98 580
PFO3OA 3,200 2,900 34 J 32 740 21 91
PFO4DA 3,100 3,200 14 J 12 820 4.8 120
PFO5DA 1,900 2,100 8.3 J 6.1 1,600 2.1 280
PMPA 620 650 50 J 59 2,200 370 1,200
PEPA 230 240 45 J 52 940 390 570
PS Acid 2,100 910 17 J 20 640 18 33
Hydro-PS Acid 500 380 4.3 J 3.5 640 2.8 180
R-PSDA 410 670 790 J 850 3,100 190 190
Hydrolyzed PSDA 1,200 1,300 4.6 B 4.5 950 2.8 23
R-PSDCA <20 <20 <2 UJ <2 42 <2 <20
NVHOS 3,500 2,600 2.5 J <2 410 3.5 24
EVE Acid 150 120 31 J 42 810 42 <20
Hydro-EVE Acid 280 200 6.2 J 7.5 260 3.3 67
R-EVE 260 130 15 J 15 540 15 54
PES <20 <20 <2 UJ <2 <20 <2 <20
PFECA B <20 <20 <2 UJ <2 <20 <2 <20
PFECA-G <20 <20 <2 UJ <2 <20 <2 <20
Total Table 3+ (17 compounds)130,000 100,000 1,400 1,300 33,000 2,100 4,900
Total Table 3+ (20 compounds)140,000 100,000 2,200 2,100 37,000 2,300 5,200
Total Table 3+ SOP Solid Residue (ng/filter)
Hfpo Dimer Acid ----0.62 J --------
PFMOAA ----0.037 J --------
PFO2HxA ----0.12 J --------
PFO3OA ----0.029 J --------
PFO4DA ----0.015 J --------
PFO5DA ----0.034 J --------
PMPA ----0.065 J --------
PEPA ----0.066 J --------
PS Acid ----0.06 J --------
Hydro-PS Acid ----0.093 J --------
R-PSDA ----1.2 J --------
Hydrolyzed PSDA ----0.0097 J --------
R-PSDCA ----<0.004 UJ --------
NVHOS ----<0.004 UJ --------
EVE Acid ----0.062 J --------
Hydro-EVE Acid ----0.035 J --------
R-EVE ----0.02 J --------
PES ----<0.004 UJ --------
PFECA B ----<0.004 UJ --------
PFECA-G ----<0.004 UJ --------
Total Table 3+ (17 compounds)----1.2 --------
Total Table 3+ (20 compounds)----2.5 --------
Other (mg/L)
Total Suspended Solids ----<1 --------
Page 1 of 7 October 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE B2
ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC P.C.
Location ID
Field Sample ID
Sample Date
QA/QC
Sample Matrix
Filtered/Unfiltered
Sample Delivery Group (SDG)
Lab Sample ID
Total Table 3+ SOP (ng/L)
Hfpo Dimer Acid
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)
Total Table 3+ (20 compounds)
Total Table 3+ SOP Solid Residue (ng/filter)
Hfpo Dimer Acid
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)
Total Table 3+ (20 compounds)
Other (mg/L)
Total Suspended Solids
LOC62 LOC62 LOC63 LOC63 LOC63A LOC63A LOC64
ASTW-LOC-62-030520 ASTW-LOC-62-030520-Z ASTW-LOC-63-030520 ASTW-LOC-63-030520-Z ASTW-LOC-63A-030520 ASTW-LOC-63A-030520-Z ASTW-LOC-64-030520
3/5/2020 3/5/2020 3/5/2020 3/5/2020 3/5/2020 3/5/2020 3/5/2020
Liquid Liquid Liquid Liquid Liquid Liquid Liquid
Unfiltered Filtered Unfiltered Filtered Unfiltered Filtered Unfiltered
2091278/2095248/2095247 2091270 2091278/2095248/2095247 2091270 2091278/2095248/2095247 2091270 2091278/2095248/2095247
1275419/1290772 1275274 1275420/1290776 1275278 1275417/1290756 1275266 1275418/1290760
15,000 J 12,000 2,300 J 1,900 1,800 J 1,600 3,800 J
12,000 J 9,700 2,300 J 1,500 140 J 150 210 J
28,000 J 26,000 1,700 J 1,100 380 J 360 2,400 J
9,400 J 11,000 640 J 500 98 J 100 350 J
7,000 J 6,000 630 J 450 84 J 80 89 J
5,800 J 4,500 320 J 340 68 J 94 42 J
15,000 J 13,000 850 J 810 480 J 480 3,600 J
9,300 J 7,200 660 J 430 360 J 300 2,000 J
51,000 J 41,000 170 J 220 34 J 43 120 J
2,700 J 1,900 140 J 130 64 J 85 140 J
24,000 J 19,000 4,900 J 4,600 1,000 J 750 2,200 J
7,100 J 5,000 320 B 590 170 J 82 350 J
64 J 62 17 J 15 4.9 J 4.4 8.4 J
1,000 J 620 150 J 150 38 J 39 58 J
1,500 J 1,200 310 J 430 190 J 200 24 J
380 J 410 80 J 71 41 J 47 37 J
860 J 570 440 J 240 250 J 140 410 J
<2 UJ <2 <2 UJ <2 <2 UJ <2 <2 UJ
<2 UJ <2 <2 UJ <2 <2 UJ <2 <2 UJ
4.9 J 3.7 <2 UJ <2 <2 UJ <2 <2 UJ
160,000 130,000 10,000 8,000 3,800 3,600 13,000
190,000 160,000 16,000 13,000 5,200 4,600 16,000
0.7 J --0.15 J --1.9 J --0.53 J
0.23 J --0.037 J --0.27 J --0.34 J
0.68 J --0.038 J --0.65 J --0.053 J
0.45 J --0.023 J --0.17 J --0.64 J
0.63 J --0.11 J --0.16 J --0.21 J
3.3 J --0.75 J --0.41 J --0.45 J
0.38 J --0.07 J --0.92 J --2.6 UJ
0.26 B --0.13 UJ --0.53 J --3 J
9.5 J --0.27 J --0.13 J --0.98 J
2.3 J --0.33 J --0.34 J --0.72 J
1.6 J --0.7 J --3.5 J --0.092 J
1.6 J --0.1 J --0.51 J --0.49 J
0.014 J --0.0046 J --0.0087 J --0.02 J
0.031 J --0.0097 J --0.067 J --0.1 J
0.72 J --0.12 J --0.47 J --0.08 J
0.82 J --0.055 J --0.12 J --0.17 J
0.079 J --0.091 J --0.63 J --0.47 J
<0.004 UJ --<0.004 UJ --<0.004 UJ --<0.004 UJ
<0.004 UJ --<0.004 UJ --<0.004 UJ --<0.004 UJ
<0.004 UJ --<0.004 UJ --<0.004 UJ --<0.004 UJ
20 --2.1 --6.1 --9.9
23 --3.0 --11 --11
30 --49 --1.79 J --500
Page 2 of 7 October 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE B2
ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC P.C.
Location ID
Field Sample ID
Sample Date
QA/QC
Sample Matrix
Filtered/Unfiltered
Sample Delivery Group (SDG)
Lab Sample ID
Total Table 3+ SOP (ng/L)
Hfpo Dimer Acid
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)
Total Table 3+ (20 compounds)
Total Table 3+ SOP Solid Residue (ng/filter)
Hfpo Dimer Acid
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)
Total Table 3+ (20 compounds)
Other (mg/L)
Total Suspended Solids
LOC64 LOC65 LOC65 LOC65 LOC65 LOC66 LOC67
ASTW-LOC-64-030520-Z ASTW-LOC-65-030520 ASTW-LOC-65-030520-Z ASTW-LOC-65-030520-D ASTW-LOC-65-030520-DZ ASTW-LOC-66-030520 ASTW-LOC-67-030520
3/5/2020 3/5/2020 3/5/2020 3/5/2020 3/5/2020 3/5/2020 3/5/2020
DUP DUP
Liquid Liquid Liquid Liquid Liquid Liquid Liquid
Filtered Unfiltered Filtered Unfiltered Filtered Unfiltered Unfiltered
2091270 2091278/2095248/2095247 2091270 2095247/2095248 2091270 2091273 2091273
1275270 1275422/1290786 1275286 1289942/1290795 1277367 1275324 1275328
3,300 12,000 J 10,000 9,800 J 10,000 2,100 860
220 250 J 230 270 J 270 49 21
2,100 2,100 J 2,300 2,100 J 2,200 440 140
360 350 J 340 300 J 390 64 12
83 190 J 170 150 J 190 19 4
43 180 J 140 J 140 J 190 J 13 3.4
2,800 21,000 J 21,000 24,000 J 22,000 4,400 12,000
1,900 17,000 J 16,000 17,000 J 16,000 2,600 7,200
150 300 J 290 260 J 320 1,700 110
140 230 J 210 190 J 230 160 47 J
1,400 6,500 J 5,100 6,600 J 4,700 3,300 260 J
190 1,000 B 840 1,200 B 870 370 31 J
7 93 J 85 92 J 85 2.7 <2
65 360 J 500 370 J 590 110 5.9
27 45 J 41 J 40 J 38 J 38 4.1
41 72 J 69 J 60 J 64 J 22 3.2
250 450 J 260 370 J 240 830 62
<2 <2 UJ <2 <2 UJ <20 <2 <2
<2 <2 UJ <2 <2 UJ <20 <2 <2
<2 <2 UJ <2 <2 UJ <20 <2 <2
11,000 54,000 51,000 55,000 53,000 12,000 20,000
13,000 62,000 58,000 63,000 58,000 16,000 21,000
--0.95 J --1.4 J ------
--0.011 UJ --0.13 J ------
--0.085 J --0.23 J ------
--0.053 J --0.17 J ------
--0.12 J --0.3 J ------
--0.31 J --0.56 J ------
--0.69 J --2.2 J ------
--0.6 J --1.8 J ------
--1.4 J --2.7 J ------
--1 J --1.6 J ------
--0.67 J --1.9 J ------
--0.32 J --1.2 J ------
--0.055 J --0.23 J ------
--0.038 J --0.17 J ------
--0.055 J --0.32 J ------
--0.11 J --0.24 J ------
--0.046 J --0.49 J ------
--<0.004 UJ --0.1 J ------
--<0.004 UJ --0.089 J ------
--<0.004 UJ --0.078 J ------
--5.5 --12 ------
--6.5 --16 ------
--270 ----------
Page 3 of 7 October 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE B2
ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC P.C.
Location ID
Field Sample ID
Sample Date
QA/QC
Sample Matrix
Filtered/Unfiltered
Sample Delivery Group (SDG)
Lab Sample ID
Total Table 3+ SOP (ng/L)
Hfpo Dimer Acid
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)
Total Table 3+ (20 compounds)
Total Table 3+ SOP Solid Residue (ng/filter)
Hfpo Dimer Acid
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)
Total Table 3+ (20 compounds)
Other (mg/L)
Total Suspended Solids
LOC68 LOC69 LOC69 LOC69 LOC69 LOC70 LOC71
ASTW-LOC-68-030520-Z ASTW-LOC-69-030520 ASTW-LOC-69-030520-Z ASTW-LOC-69-030520-D ASTW-LOC-69-030520-DZ ASTW-LOC-70-030520 ASTW-LOC-71-030520
3/5/2020 3/5/2020 3/5/2020 3/5/2020 3/5/2020 3/5/2020 3/5/2020
DUP DUP
Liquid Liquid Liquid Liquid Liquid Liquid Liquid
Filtered Unfiltered Filtered Unfiltered Filtered Unfiltered Unfiltered
2091273 2091278/2095248 2091270 2095247/2095248 2091270 2091273 2091278/2095248/2095247
1275332 1275421/1289930 1275282 1289938/1290791 1277363 1275336 1275414/1290744
210,000 32,000 J 31,000 30,000 J 33,000 86,000 19,000 J
1,600 9,300 J 7,200 8,900 J 7,200 14,000 100,000 J
11,000 11,000 J 9,700 10,000 J 9,900 140,000 23,000 J
3,000 3,700 J 3,900 3,600 J 4,300 38,000 12,000 J
570 2,200 J 2,200 2,300 J 2,600 22,000 8,900 J
390 1,200 J 1,400 J 1,000 J 1,500 18,000 4,100 J
3,200 1,800 J 2,000 1,900 J 2,100 12,000 2,600 J
<2,000 850 J 750 J 920 J 780 J 6,300 1,500 J
78,000 7,300 J 7,600 7,000 J 7,200 71,000 1,500 J
7,500 1,200 J 1,100 J 1,100 J 1,000 J 7,500 J 2,100 J
140,000 9,000 J 5,900 7,900 J 5,800 190,000 J 1,400 J
17,000 1,500 B 860 1,500 B 830 16,000 J 2,600 B
<200 130 J 130 140 J 120 <200 47 J
3,100 760 J 440 740 J 580 2,100 3,600 J
11,000 1,300 J 1,100 J 1,200 J 1,100 12,000 330 J
2,400 310 J 310 310 J 310 2,300 360 J
7,000 790 J 490 750 J 500 5,000 320 J
<200 <2 UJ <2 <2 UJ <20 <200 <2 UJ
<200 <2 UJ <2 <2 UJ <20 <200 <2 UJ
<200 5.3 J 4.1 J 5.4 J <20 <200 <2 UJ
330,000 73,000 69,000 69,000 72,000 430,000 180,000
500,000 84,000 76,000 79,000 79,000 640,000 180,000
------5 J ----0.84 J
------0.62 J ----1.5 J
------1.7 J ----0.64 J
------0.72 J ----0.71 J
------0.95 J ----3.4 J
------3.2 J ----4 J
------1.1 J ----0.12 J
------0.55 J ----0.065 J
------5 J ----2.5 J
------2.5 J ----3.3 J
------3.1 J ----0.2 J
------1.4 J ----0.64 J
------0.24 J ----0.028 J
------0.49 J ----0.19 J
------1 J ----0.4 J
------0.66 J ----0.28 J
------0.96 J ----0.04 J
------0.095 J ----<0.004 UJ
------0.07 J ----<0.004 UJ
------0.041 J ----<0.004 UJ
------24 ----18
------29 ----19
--12 --------52
Page 4 of 7 October 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE B2
ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC P.C.
Location ID
Field Sample ID
Sample Date
QA/QC
Sample Matrix
Filtered/Unfiltered
Sample Delivery Group (SDG)
Lab Sample ID
Total Table 3+ SOP (ng/L)
Hfpo Dimer Acid
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)
Total Table 3+ (20 compounds)
Total Table 3+ SOP Solid Residue (ng/filter)
Hfpo Dimer Acid
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)
Total Table 3+ (20 compounds)
Other (mg/L)
Total Suspended Solids
LOC71 LOC72 LOC72 LOC73 LOC75 LOC76 LOC77
ASTW-LOC-71-030520-Z ASTW-LOC-72-030520 ASTW-LOC-72-030520-Z ASTW-LOC-73-030520 ASTW-LOC-75-030520 ASTW-LOC-76-030520 ASTW-LOC-77-030520
3/5/2020 3/5/2020 3/5/2020 3/5/2020 3/5/2020 3/5/2020 3/5/2020
Liquid Liquid Liquid Liquid Liquid Liquid Liquid
Filtered Unfiltered Filtered Unfiltered Unfiltered Unfiltered Unfiltered
2091270 2091278/2095248/2095247 2091270 2091273 2091273 2091273 2091278/2095248/2095247
1275254 1275415/1290748 1275258 1275340 1275344 1275348 1275416/1290752
16,000 300 J 290 520 1,500 910 2,900 J
98,000 12 J 12 22 21 18 250 J
21,000 58 J 57 100 98 99 610 J
14,000 19 J 17 31 33 32 360 J
9,200 7.2 J 6 13 15 15 370 J
4,600 3.5 J 2.7 6.2 9.4 8.7 170 J
2,400 17 J 11 45 46 26 120 J
<2,000 <20 UJ <20 24 <20 <20 130 J
1,200 J 100 J 130 25 10 20 91 J
1,400 11 J 10 17 J 6.7 J 7.6 J 54 J
680 27 J 21 89 J 25 J 21 J 740 J
1,200 18 B 15 6.7 J 11 J 17 J 150 J
<200 <2 UJ <2 <2 <2 <2 7.8 J
2,400 3.1 J <2 3.6 <2 <2 50 J
300 2.7 J <2 4.3 3.2 3.6 50 J
300 <2 UJ <2 <2 <2 <2 20 J
<200 3.6 J 2.5 9.9 6.3 8.2 180 J
<200 <2 UJ <2 <2 <2 <2 <2 UJ
<200 <2 UJ <2 <2 <2 <2 <2 UJ
<200 <2 UJ <2 <2 <2 <2 <2 UJ
170,000 530 540 810 1,700 1,100 5,200
170,000 580 570 920 1,800 1,200 6,300
--0.032 J --------1.3 J
--<0.01 UJ --------0.019 J
--0.01 J --------0.19 J
--0.006 J --------0.13 J
--0.0098 J --------0.52 J
--0.084 J --------0.91 J
--<0.02 UJ --------0.022 UJ
--<0.04 UJ --------<0.04 UJ
--0.64 J --------0.082 J
--0.099 J --------0.54 J
--<0.004 UJ --------0.46 J
--0.0093 J --------0.13 J
--<0.004 UJ --------0.0058 J
--<0.004 UJ --------0.065 J
--0.0079 J --------0.45 J
--<0.004 UJ --------0.11 J
--<0.004 UJ --------0.17 J
--<0.004 UJ --------<0.004 UJ
--<0.004 UJ --------<0.004 UJ
--<0.004 UJ --------<0.004 UJ
--0.89 --------4.3
--0.90 --------5.1
--1.04 J --------12
Page 5 of 7 October 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE B2
ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC P.C.
Location ID
Field Sample ID
Sample Date
QA/QC
Sample Matrix
Filtered/Unfiltered
Sample Delivery Group (SDG)
Lab Sample ID
Total Table 3+ SOP (ng/L)
Hfpo Dimer Acid
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)
Total Table 3+ (20 compounds)
Total Table 3+ SOP Solid Residue (ng/filter)
Hfpo Dimer Acid
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)
Total Table 3+ (20 compounds)
Other (mg/L)
Total Suspended Solids
LOC77 LOC78 LOC79 LOC80 LOC83 LOC84 LOC85
ASTW-LOC-77-030520-Z ASTW-LOC-78-030520 ASTW-LOC-79-030520 ASTW-LOC-80-030520 ASTW-LOC-83-030520 ASTW-LOC-84-030520 ASTW-LOC-85-030520-Z
3/5/2020 3/5/2020 3/5/2020 3/5/2020 3/5/2020 3/5/2020 3/5/2020
Liquid Liquid Liquid Liquid Liquid Liquid Liquid
Filtered Unfiltered Unfiltered Unfiltered Unfiltered Unfiltered Filtered
2091270 2091277 2091277 2091277 2091277 2091277 2091277
1275262 1275372 1275376 1275380 1275384 1275388 1275392
2,600 3,600 9,600 6,200 260 740 730
260 48 2,100 1,100 <5 40 <5
590 210 2,600 1,800 4.4 20 8.6
370 50 1,600 810 <2 4.1 <2
280 23 1,400 620 <2 3.4 <2
160 14 1,400 330 <2 4.6 <2
150 370 930 2,500 <10 81 66
61 250 440 1,300 <20 <20 <20
95 500 330 1,500 <2 2.6 B <2
56 36 J 410 370 <2 2.2 <2
540 430 J 3,800 4,600 6.4 34 6.5
72 33 J 700 B 2,000 <2 5.2 B <2
6.8 <2 45 55 <2 <2 <2
55 17 300 470 <2 2.6 <2
52 65 200 870 <2 <2 <2
21 15 150 220 <2 <2 <2
92 98 400 2,100 <2 11 <2
<2 <2 <2 <20 <2 <2 <2
<2 <2 <2 <20 <2 <2 <2
<2 <2 <2 <20 <2 <2 <2
4,800 5,200 22,000 18,000 260 900 800
5,500 5,800 26,000 27,000 270 950 810
--------------
--------------
--------------
--------------
--------------
--------------
--------------
--------------
--------------
--------------
--------------
--------------
--------------
--------------
--------------
--------------
--------------
--------------
--------------
--------------
--------------
--------------
--------------
Page 6 of 7 October 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
TABLE B2
ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC P.C.
Location ID
Field Sample ID
Sample Date
QA/QC
Sample Matrix
Filtered/Unfiltered
Sample Delivery Group (SDG)
Lab Sample ID
Total Table 3+ SOP (ng/L)
Hfpo Dimer Acid
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)
Total Table 3+ (20 compounds)
Total Table 3+ SOP Solid Residue (ng/filter)
Hfpo Dimer Acid
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)
Total Table 3+ (20 compounds)
Other (mg/L)
Total Suspended Solids
LOC86 LOC87 LOC88 EB FBLK
ASTW-LOC-86-030520 ASTW-LOC-87-030520 ASTW-LOC-88-030520 ASTW-LOC-EB-030520 ASTW-LOC-FB-030520
3/5/2020 3/5/2020 3/5/2020 3/5/2020 3/5/2020
Equipment Blank Field Blank
Liquid Liquid Liquid Liquid Liquid
Unfiltered Unfiltered Unfiltered Unfiltered Unfiltered
2091277 2091277 2091277 2091277/2091279 2091277/2091279
1275396 1275400 1275404 1275408/1275423 1275412/1275424
280 220 660 <2 <2 Notes:
<5 <5 <5 <5 <5 Bold - Analyte detected above associated reporting limit
<2 12 13 <2 <2 Abbreviations:
<2 2.1 2 <2 <2 B - analyte detected in an associated blank
<2 <2 <2 <2 <2 EPA - Environmental Protection Agency
<2 <2 <2 <2 <2 J - Analyte detected. Reported value may not be accurate
<10 21 25 <10 <10 or precise
<20 <20 <20 <20 <20 mg/ L - milligrams per liter
<2 3.3 B 8.9 B 2.2 <2 ND - no Table 3+ analytes were detected above the
<2 <2 2.1 <2 <2 associated reporting limits
<2 23 13 <2 <2 ng/L - nanograms per liter
<2 3 B <2 6 <2 QA/QC - Quality assurance/ quality control
<2 <2 <2 <2 <2 SDG - Sample Delivery Group
<2 <2 <2 <2 <2 SOP - standard operating procedure
<2 <2 <2 <2 <2 UJ – Analyte not detected. Reporting limit may not be
<2 <2 <2 <2 <2 accurate or precise.
<2 10 6.8 <2 <2 < - Analyte not detected above associated reporting limit.
<2 <2 <2 <2 <2
<2 <2 <2 <2 <2
<2 <2 <2 <2 <2
280 260 710 2 ND
280 290 730 8 ND
----------
----------
----------
----------
----------
----------
----------
----------
----------
----------
----------
----------
----------
----------
----------
----------
----------
----------
----------
----------
----------
----------
------<1 <1
Page 7 of 7 October 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672

APPENDIX C
Analytical Results – All Sampling Events

DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID 1 1 1 1
Sampling Event April 2019 June 2019 August 2019 October 2019
Field Sample ID DSTW-LOC1-042419 STW-LOC1-062819 STW-LOC1-082219 STW-LOC1-101019
Date Sampled 4/24/2019 06/28/2019 8/22/2019 10/10/2019
Analytical Laboratory TestAmerica TestAmerica TestAmerica TestAmerica
QA/QC --------Table 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)14 18 30 12
PFMOAA 7 J <5 25 <5 UJ
PFO2HxA 12 J 14 21 7.5
PFO3OA <2 UJ 2.5 3.3 <2
PFO4DA <2 UJ <2 <2 <2
PFO5DA <2 UJ <2 <2 <2
PMPA 21 J 23 37 27
PEPA <20 UJ <20 <20 <20
PS Acid <2 UJ <2 <2 <2
Hydro-PS Acid <2 UJ <2 <2 <2
R-PSDA 11 J 2.8 J 15 J 8.5 J
Hydrolyzed PSDA 3.2 J <2 11 J 2.3 J
R-PSDCA <2 UJ <2 <2 <2
NVHOS <2 UJ <2 5.1 5.8
EVE Acid <2 UJ <2 <2 <2
Hydro-EVE Acid <2 UJ <2 <2 <2
R-EVE 6.4 J <2 4 J <2
PES <2 UJ <2 <2 <2
PFECA B <2 UJ <2 <2 <2
PFECA-G <2 UJ <2 <2 <2
Total Table 3+ Compounds (17 compounds)*54 58 120 52
Total Table 3+ Compounds (20 compounds)*75 60 150 63
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate <2.0 <2 <2 <2
F-53B Minor (11Cl-PF3OUdS)----<2 <2
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)<20 <20 <20 <20
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)<20 <20 <20 <20
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol <60 <2 <2 <2
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol <110 <2 <4 <4
6:2 Fluorotelomer sulfonate <20 <20 <20 <20
F-53B Major (9Cl-PF3ONS)----<2 <2
ADONA <2.1 <2.1 <2.1 <2.1
DONA --------
NaDONA <2.1 <2.1 <2.1 <2.1
N-ethyl perfluorooctane sulfonamidoacetic acid <20 <20 <20 <20
N-ethylperfluoro-1-octanesulfonamide <37 2.7 <2 <2
N-methyl perfluoro-1-octanesulfonamide <35 <2 <2 <2
N-methyl perfluorooctane sulfonamidoacetic acid <20 <20 <20 <20
Perfluorobutane Sulfonic Acid 2.3 3.7 4 6.5
Perfluorobutanoic Acid 7.1 8.3 8.5 19
Perfluorodecane Sulfonic Acid <2.0 <2 <2 <2
Perfluorodecanoic Acid <2.0 <2 <2 <2
Perfluorododecane sulfonic acid (PFDoS)<2.0 <2 <2 <2
Perfluorododecanoic Acid <2.0 <2 <2 <2
Perfluoroheptane sulfonic acid (PFHpS)<2.0 <2 <2 <2
Perfluoroheptanoic Acid 7.0 14 20 32
Perfluorohexadecanoic acid (PFHxDA)<2.0 <2 <2 <2
Perfluorohexane Sulfonic Acid 3.3 5 5.6 8.7
Perfluorohexanoic Acid 9.2 21 26 51
Perfluorononanesulfonic acid <2.0 <2 <2 <2
Perfluorononanoic Acid <2.0 <2 <2 <2
Perfluorooctadecanoic acid <2.0 <2 <2 <2
Perfluorooctane Sulfonamide <2.0 <2 <2 <2
Perfluoropentane sulfonic acid (PFPeS)<2.0 <2 <2 <2
Perfluoropentanoic Acid 7 17 26 48
Perfluorotetradecanoic Acid <2.0 <2 <2 <2
Perfluorotridecanoic Acid <2.0 <2 <2 <2
Perfluoroundecanoic Acid <2.0 <2 <2 <2
PFOA 8.1 8.5 8.7 10
PFOS 12 11 12 14
TR0795A Page 1 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
1 1 1 1
December 2019 January 2020 April 2020 May/June 2020
STW-LOC-1-122019 STW-LOC-1-122019 STW-LOC-1-4-042820 STW-LOC-1-2-052120
12/20/2019 1/29/2020 4/28/2020 5/20/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--------
9.8 B 13 13 24
14 12 7.6 <5
6.9 6.1 11 12
<2 <2 2 2.3
<2 <2 <2 <2
<2 <2 4.6 3.1
23 B 17 26 56
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
5 J 5.5 J 11 J 31 J
7.1 J 6.1 J 5.2 J 4.8 J
<2 <2 <2 <2
<2 <2 5.5 4.6
<2 <2 <2 <2
<2 <2 <2 <2
<2 2.3 J <2 6.6 J
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
54 48 70 100
66 62 86 140
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 <2.1 <2.1 --
------<2
<2.1 <2.1 <2.1 --
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
3.1 2.2 3.4 3.6 J
3.6 <2 5.1 5.6
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
8.8 4.8 4.2 5.1 J
<2 <2 <2 <2
3 2.4 4.1 4.8 J
15 6.3 8.5 11
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
9.7 5.4 11 9.8
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
5.4 3.8 5.5 5.5 J
6.8 5.4 8.3 9.0
TR0795A Page 2 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
1 2 3 4
August 2020 May/June 2020 May/June 2020 May/June 2020
STW-LOC-1-4-082620 STW-LOC-2-.33-052120 STW-LOC-3-2-052120 STW-LOC-4-2-052120
8/26/2020 5/20/2020 5/20/2020 5/20/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--------
13 2,700 2,700 620
5.0 <11 <11 12
14 41 25 6.9
2.5 10 11 3.3
<2 4 8 2
<2 <2 11 4.9
60 220 <28 65
<10 32 <20 <20
<2 11 <2 <2
<2 5 4 2
<2 26 J 17 J 17 J
3.0 19 J 5.2 J 2.2 J
<2 <2 <2 <2
6.5 4.7 3.1 <2
<2 <2 <2 <2
<2 2 <2 <2
<2 15 J 5.4 J 3.8 J
<2 <2.3 <2.3 <2
<2 <3 <3 <2
<2 <2 <2 <2
100 3,000 2,800 720
100 3,100 2,800 740
<2 <3 <3.2 <2
<2 <5 <5.4 <2.5
<20 <31 <34 <20
<20 <82 <87 <41
<2 <13 <14 <6.7
<4 <22 <23 <11
<20 <31 <34 <20
<2 <3.8 <4 <2
--------
<2 <2.8 <3 <2
--------
<20 <30 <32 <20
<2 <14 <15 <6.9
<2 <6.8 <7.2 <3.4
<20 <49 <52 <24
4.1 <3.1 <3.4 <2
4.3 <5.5 <5.9 <2.8
<2 <5 <5.4 <2.5
<2 <4.9 <5.2 <2.4
<2 <7.1 <7.5 <3.6
<2 <8.6 <9.2 <4.3
<2 <3 <3.2 <2
3.0 <3.9 <4.2 <2
--<14 <15 <7
3.6 <2.7 3 <2
7.1 <9.1 <9.7 <4.6
<2 <2.5 <2.7 <2
<2 <4.2 <4.5 <2.1
<2 <7.2 <7.7 <3.6
<2 <5.5 <5.9 <2.8
<2 <4.7 <5 <2.4
7.1 <7.7 <8.2 <3.9
<2 <4.6 <4.9 <2.3
<2 <20 <22 <10
<2 <17 <18 <8.7
5.1 18 26 9
7.4 <8.5 15 <4.3
TR0795A Page 3 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
5 6A 6A 6A
May/June 2020 April 2019 June 2019 August 2019
STW-LOC-5-1.99-052120 DSTW-LOC6A-042419 STW-LOC-6A-062719 STW-LOC6A-082119
5/20/2020 04/24/2019 06/27/2019 8/21/2019
TestAmerica TestAmerica TestAmerica TestAmerica
--------
100 13 66 19
<5 <5 UJ <5 UJ <5
19 11 J 11 J 12
4.5 <2 UJ <2 UJ <2
3 <2 UJ <2 UJ <2
9.2 <2 UJ <2 UJ <2
68 24 J 23 J 27
<20 <20 UJ <20 UJ <20
13 <2 UJ <2 UJ <2
51 <2 UJ <2 UJ <2
120 J 8.1 J 7.9 J <2
5.2 J 4.3 J <2 UJ 5.1 J
5 <2 UJ <2 UJ <2
9.9 <2 UJ <2 UJ 5.3
<2 <2 UJ <2 UJ <2
<2 <2 UJ <2 UJ <2
11 J 2.6 J 4 J 3.9 J
<2 <2 UJ <2 UJ <2
<2 <2 UJ <2 UJ <2
<2 <2 UJ <2 UJ <2
280 48 100 63
420 63 110 72
<2 <2.0 <2 <2
<2 ----<2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <60 <60 <2
<4 <110 <110 <4
<20 <20 <20 <20
<2 ----<2
--<2.1 <2.1 <2.1
<2 ------
--<2.1 <2.1 <2.1
<20 <20 <20 <20
<2 <37 UJ <37 <2
<2 <35 UJ <35 <2
<20 <20 <20 <20
2 2.4 3.6 4.3
3.4 7.6 11 8.7
<2 <2.0 <2 <2
<2 <2.0 <2 <2
<2 <2.0 <2 <2
<2 <2.0 <2 <2
<2 <2.0 <2 <2
<2 7.4 13 21
<2 <2.0 <2 <2
<2 3.7 5.3 6.5
<2 9.2 22 27
<2 <2.0 <2 <2
<2 <2.0 <2 <2
<2 <2.0 <2 <2
<2 <2.0 <2 <2
<2 <2.0 <2 <2
12 7.4 18 27
<2 <2.0 <2 <2
<2 <2.0 <2 <2
<2 <2.0 <2 <2
<2 8.6 8.3 11
2.1 14 14 18
TR0795A Page 4 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
6A 6A 6A 6A
October 2019 December 2019 January 2020 April 2020
STW-LOC6A-100919 STW-LOC-6A-122019 STW-LOC6A-012920 STW-LOC-6A-042820
10/9/2019 12/20/2019 1/29/2020 4/28/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--------
17 30 B 36 17
<5 UJ 13 13 J 9.9
12 7.7 16 11
2 <2 <2 2
<2 <2 <2 <2
<2 <2 <2 5.9
37 53 B 62 30
<20 22 24 <20
<2 <2 <2 <2
<2 <2 <2 <2
15 J 6.5 J 21 J 14 J
2.9 J 6.4 J 7.3 J 4.7 J
<2 <2 <2 <2
6.6 <2 <2 5.4
<2 <2 <2 <2
<2 <2 <2 <2
6 J 4.2 J 7.8 J 5 J
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
75 130 150 81
99 140 190 100
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
5.9 3.1 2.5 3.6
18 <2 4 5.8
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
36 11 5.3 4.7
<2 <2 <2 <2
8.9 3.6 2.9 4.8
48 16 7 9.2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
45 11 5.6 11
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
12 6.1 5.3 6.9
18 9.4 8.6 14
TR0795A Page 5 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
6A 6A 6B 6B
May/June 2020 August 2020 April 2019 June 2019
STW-LOC6A-060320 STW-LOC-6A-082620 DSTW-LOC6B-042419 STW-LOC-6B-062719
6/3/2020 8/26/2020 04/24/2019 06/27/2019
TestAmerica TestAmerica TestAmerica TestAmerica
--------
6.7 J 21 41 24
<2 UJ 24 <5 UJ <5 UJ
7.1 J 23 11 J 13 J
<2 UJ 3.4 <2 UJ <2 UJ
<2 UJ <2 <2 UJ <2 UJ
<2 UJ <2 <2 UJ <2 UJ
14 J 80 23 J 23 J
2 J <10 <20 UJ <20 UJ
<2 UJ <2 <2 UJ <2 UJ
<2 UJ <2 <2 UJ <2 UJ
7.6 J <2 11 J 13 J
2.4 J 10 3.6 J <2 UJ
<2 UJ <2 <2 UJ <2 UJ
<2 UJ <2 <2 UJ <2 UJ
<2 UJ <2 <2 UJ <2 UJ
<2 UJ <2 <2 UJ <2 UJ
3.6 J <2 6.6 J 5.8 J
<2 UJ <2 <2 UJ <2 UJ
<2 UJ <2 <2 UJ <2 UJ
<2 UJ <2 <2 UJ <2 UJ
30 150 75 60
43 160 96 79
<2 <2 <2.0 <2
<2 <2 ----
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <60 <60
<4 <4 <110 <110
<20 <20 <20 <20
<2 <2 ----
----<2.1 <2.1
<2 <2 ----
----<2.1 <2.1
<20 <20 <20 <20
<2 <2 <37 UJ <37
<2 <2 <35 UJ <35
<20 <20 <20 <20
3 4.2 2.3 3.6
3 5.5 7.1 9.2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
5 3.3 7.4 13
<2 --<2.0 <2
3.5 4.1 3.6 5.6
9.7 7.5 9.3 20
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
6.4 7.9 7.2 17
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
7.6 6 9.3 9.6
16 11 14 16
TR0795A Page 6 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
6B 6B 6B 6B
August 2019 October 2019 December 2019 January 2020
STW-LOC6B-082119 STW-LOC6B-100919 STW-LOC-6B-122019 STW-LOC6B-012920
8/21/2019 10/9/2019 12/20/2019 1/29/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--------
17 17 9 B 25
<5 <5 UJ 13 8.9 J
11 11 6.4 6.1
<2 2.1 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
37 30 19 B 26
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
12 J 11 J <2 3.4 J
2.5 J 2.8 J 6.4 J 5.1 J
<2 <2 <2 <2
4.4 6.5 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
3.2 J 4.7 J <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
69 67 47 66
87 85 54 75
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
4.3 6.9 3.3 2.4
8.4 18 <2 3.4
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
20 35 8.2 4.7
<2 <2 <2 UJ <2
5.8 8.5 3.4 2.6
27 48 16 6.3
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 UJ <2
<2 <2 <2 <2
<2 <2 <2 <2
26 46 10 5.5
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
8.8 11 4.9 4.2
15 16 7.2 5.9
TR0795A Page 7 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
6B 6B 6B 7A
April 2020 May/June 2020 August 2020 April 2019
STW-LOC-6B-042820 STW-LOC6B-060320 STW-LOC-6B-082620 DSTW-LOC7A-042419
4/28/2020 6/3/2020 8/26/2020 04/24/2019
TestAmerica TestAmerica TestAmerica TestAmerica
--------
12 4.5 J 27 14
9.8 <2 UJ 31 8 J
9.5 6.4 J 32 12 J
<2 <2 UJ 4.7 <2 UJ
<2 <2 UJ <2 <2 UJ
4.5 <2 UJ <2 <2 UJ
31 17 J 53 24 J
<20 <2 UJ <10 <20 UJ
<2 <2 UJ <2 <2 UJ
<2 <2 UJ <2 <2 UJ
10 J <2 UJ <2 5.3 J
4 J 2 J <2 4.2 J
<2 <2 UJ <2 <2 UJ
5.1 <2 UJ <2 <2 UJ
<2 <2 UJ <2 <2 UJ
<2 <2 UJ <2 <2 UJ
<2 <2 UJ <2 3.9 J
<2 <2 UJ <2 <2 UJ
<2 <2 UJ <2 <2 UJ
<2 <2 UJ <2 <2 UJ
72 28 150 58
86 30 150 71
<2 <2 <2 <2.0
<2 <2 <2 --
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <60
<4 <4 <4 <110
<20 <20 <20 <20
<2 <2 <2 --
<2.1 ----<2.1
--<2 <2 --
<2.1 ----<2.1
<20 <20 <20 <20
<2 <2 <2 <37
<2 <2 <2 <35
<20 <20 <20 <20
3.6 3.1 4.6 2.3
5.6 8.6 5.9 7
<2 <2 <2 <2.0
<2 <2 <2 <2.0
<2 <2 <2 <2.0
<2 <2 <2 <2.0
<2 <2 <2 <2.0
4.5 4.4 3.4 7.4
<2 <2 --<2.0
4.4 3 3.8 3.4
9.2 8.8 7.5 8.3
<2 <2 <2 <2.0
<2 <2 <2 <2.0
<2 <2 <2 2
<2 <2 <2 <2.0
<2 <2 <2 <2.0
11 7.5 8.1 6.5
<2 <2 <2 <2.0
<2 <2 <2 <2.0
<2 <2 <2 <2.0
6 6.6 5.6 8.8
9.8 9.3 9.7 14
TR0795A Page 8 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
7A 7A 7A 7A
June 2019 August 2019 October 2019 December 2019
STW-LOC7A-062819 STW-LOC7A-082219 STW-LOC7A-101019 STW-LOC-7A-122019
06/28/2019 8/22/2019 10/10/2019 12/20/2019
TestAmerica TestAmerica TestAmerica TestAmerica
--------
22 13 16 9.3 B
<5 6.7 <5 UJ 13
14 9.4 10 6.7
2.2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
22 23 28 21 B
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
3.4 J 11 J 11 J <2
<2 3.1 J 3.2 J 8.2 J
<2 <2 <2 <2
<2 4.5 6.6 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 4.8 J <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
60 57 61 50
64 71 80 58
<2 <2 <2 <2
--<2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<2 <4 <4 <4
<20 <20 <20 <20
--<2 <2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
3.6 4.1 4.9 3
8.8 8.8 18 4
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
14 20 33 8.6
<2 <2 <2 <2
5.2 6.1 8.8 3.3
20 26 49 16
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
19 26 46 11
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
9.4 8.9 11 5.5
15 15 15 8.1
TR0795A Page 9 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
7A 7A 7A 7A
January 2020 April 2020 May/June 2020 August 2020
STW-LOC7A-012920 STW-LOC-7A-4-042820 STW-LOC-7A-2-052120 STW-LOC-7A-4-082620
1/29/2020 4/28/2020 5/20/2020 8/26/2020
TestAmerica TestAmerica TestAmerica TestAmerica
------
7.8 13 200 14
12 14 <5 5.2
6 10 21 13
<2 2.3 10 2.0
<2 <2 12 <2
<2 4.3 17 <2
15 25 69 57
<20 <20 <20 <10
<2 <2 90 <2
<2 <2 380 <2
4.7 J 9.2 J 120 J <2
6 J 5.5 J 98 J 3.2
<2 <2 2.2 <2
<2 5.1 7.6 6.5
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 19 J <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
41 74 810 98
52 88 1,000 100
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 <2.1 ----
----<2 <2
<2.1 <2.1 ----
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
2 3.6 4.3 4.0
2.1 5.2 7 4.4
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
3.9 4.6 5.8 3.2
<2 <2 <2 --
2.5 4.6 4.3 4.1
5 9 9.2 6.8
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
5 10 14 6.7
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
3.9 6.4 36 5.8
6.8 11 10 10
TR0795A Page 10 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
7B 7B 7B 7B
April 2019 June 2019 June 2019 August 2019
DSTW-LOC7B-042419 STW-LOC7B-062719 STW-LOC7B-062719-D STW-LOC7B-082219
04/24/2019 06/27/2019 06/27/2019 8/22/2019
TestAmerica TestAmerica TestAmerica TestAmerica
----Field Duplicate --
21 18 18 42
51 J 69 65 1,100
26 J 25 25 300
6 J 10 10 100
2.5 J 9.7 10 64
<2 UJ 24 26 35
23 J 21 19 45
<20 UJ <20 <20 <20
<2 UJ <2 2.0 6.9
7 J 120 130 180
19 J 73 J 71 J 110 J
53 J 490 J 470 J 1,100 J
<2 UJ 2.2 2.3 4.1
2.1 J 9.2 9.8 48
<2 UJ <2 <2 <2
<2 UJ <2 <2 8.7
4 J 3.7 J <2 11 J
<2 UJ <2 <2 <2
<2 UJ <2 <2 <2
<2 UJ <2 <2 <2
140 310 320 1,900
210 870 860 3,200
<2.0 <2 <2 <2
----<2
<20 <20 <20 <20
<20 <20 <20 <20
900 J <2 <2 <2
<110 <2 <2 <4
<20 <20 <20 <20
----<2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<37 UJ <2 <2 <2
<35 <2 <2 <2
<20 <20 <20 <20
2.3 3.4 3.7 4
5.2 8.9 8.7 10
<2.0 <2 <2 <2
<2.0 <2 <2 <2
<2.0 <2 <2 <2
<2.0 <2 <2 <2
<2.0 <2 <2 <2
7 14 15 20
<2.0 <2 <2 <2
3.5 5.4 5.5 5.7
8.2 21 21 26
<2.0 <2 <2 <2
<2.0 <2 <2 <2
<2.0 <2 <2 <2
<2.0 <2 <2 <2
<2.0 <2 <2 <2
7.2 18 17 27
<2.0 <2 <2 <2
<2.0 <2 <2 <2
<2.0 <2 <2 <2
7.9 8.9 9.3 9.6
14 15 16 14
TR0795A Page 11 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
7B 7B 7B 7B
October 2019 December 2019 January 2020 April 2020
STW-LOC7B-101019 STW-LOC-7B-122019 STW-LOC7B-012920 STW-LOC-7B-4-042820
10/10/2019 12/20/2019 1/29/2020 4/28/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--------
23 29 B 19 16
24 J 25 17 9.8
17 9.2 9.4 10
5.7 2.1 2 <2
4.3 <2 <2 <2
9.8 <2 <2 6.3
35 29 B 24 22
<20 <20 <20 <20
<2 <2 <2 <2
71 3.1 <2 2.4
22 J 6.8 J 8.9 J 16 J
140 J 71 J 39 J 29 J
<2 <2 <2 <2
13 2.1 <2 5.7
<2 <2 <2 <2
<2 <2 <2 <2
5.5 J <2 3.6 J <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
200 100 71 72
370 180 120 120
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
6.6 3 2.2 3.4
19 4.2 2 5.1
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
33 8.6 3.9 4.5
<2 <2 <2 <2
8.7 3.3 2.8 4.4
49 16 6.3 8.9
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
46 11 5.1 10
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
11 7.1 4.6 6.3
14 7.6 6 10
TR0795A Page 12 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
7B 7B 7C 7C
May/June 2020 August 2020 May/June 2020 August 2020
STW-LOC-7B-2-052120 STW-LOC-7B-4-082620 STW-LOC-7C-2-052120 STW-LOC-7C-4-082620
5/20/2020 8/26/2020 5/20/2020 8/26/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--------
200 20 460 24
180 41 380 36
77 27 160 23
23 6.3 59 5.4
13 4.8 38 <2
19 5.2 41 <2
66 56 100 63
<20 <10 55 <10
85 <2 250 26
350 7.1 390 6.6
120 J <2 380 J <2
170 J 70 230 J 110
2.1 <2 7.8 <2
12 8.5 30 8.0
<2 <2 23 14
<2 <2 7.2 10
17 J 10 37 J 11
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
1,000 180 2,000 220
1,300 260 2,600 340
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
--------
<2 <2 <2 <2
--------
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
4 3.9 3.9 3.6
5.1 3.8 10 3.9
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
6.5 3.5 7.6 3.3
<2 --<2 --
4.6 4.2 4.4 4.00
11 6.8 11 6.9
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
15 7.4 31 7.8
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
31 6.1 36 5.9
11 9.9 9.8 9.8
TR0795A Page 13 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
8 8 8 8
April 2019 June 2019 August 2019 October 2019
DSTW-LOC8-042419 STW-LOC8-062819 STW-LOC8-082219 STW-LOC8-101019
04/24/2019 06/28/2019 8/22/2019 10/10/2019
TestAmerica TestAmerica TestAmerica TestAmerica
--------
120 100 460 120
1,200 J <21 20,000 240 J
480 360 4,900 95 J
150 200 1,700 48
<79 210 1,000 48
51 520 480 85 J
<570 <57 160 38
<47 34 72 28
<27 37 58 9.9
240 2,600 1,700 550
<160 760 J 340 J 37 J
690 J 3,500 J 4,600 J 600 J
<15 49 43 12
<54 190 530 54
<24 <2.4 <4.9 <2
<28 18 140 9.2
<70 29 J 39 J 7 J
<46 <4.6 <9.2 <2
<60 <6 <12 <2
<41 <4.1 <8.2 <2
2,200 4,300 31,000 1,300
2,900 8,600 36,000 2,000
<2.0 <2 <2 <2
----<2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<60 <6 <2 <2
<110 <11 <4 <4
<20 <20 <20 <20
----<2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<37 <3.7 <2 <2
<35 <3.5 <2 <2
<20 <20 <20 <20
2.4 4.3 4.5 5.2
5.7 18 24 26
<2.0 <2 <2 <2
<2.0 <2 <2 <2
<2.0 <2 <2 <2
<2.0 <2 <2 <2
<2.0 <2 <2 <2
3.7 16 22 26
<2.0 <2 <2 <2
3.1 4.7 4.6 4.5
4.9 25 31 40
<2.0 <2 <2 <2
<2.0 4.8 3.2 <2
<2.0 <2 <2 <2
<2.0 <2 <2 <2
<2.0 <2 <2 <2
4.2 22 39 43
<2.0 <2 <2 <2
<2.0 <2 <2 <2
<2.0 <2 <2 <2
8.2 12 16 9.1
<2.0 2.9 2.7 2.2
TR0795A Page 14 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
8 8 8 8
December 2019 January 2020 April 2020 May 2020
STW-LOC-8-122319 STW-LOC8-013120 STW-LOC-8-4-042820 STW-LOC-8-2-052120
12/23/2019 1/31/2020 4/28/2020 5/20/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--------
500 210 200 350
220 280 88 9,400
73 100 54 2,700
16 <58 14 720
13 J <79 17 120
14 76 36 78
130 1,000 60 140
91 <47 <20 57
12 29 8.1 24
61 200 J 69 210
26 J <160 21 J 84 J
620 J 280 J 340 J 560 J
<2 <15 <2 5
16 <54 12 170
<2 <24 <2 <2
2.8 <28 3.1 19
7.8 J <70 3.5 J <3.5
<2 <46 <2 <2.3
<2 <60 <2 <3
<2 <41 <2 <2
1,100 1,900 560 14,000
1,800 2,200 930 15,000
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 <2.1 <2.1 --
------<2
<2.1 <2.1 <2.1 --
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
3.1 2.7 5 5.2
12 3.5 8.8 8.8
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
11 6.7 7.3 9.7
<2 UJ <2 <2 <2
<2 <2 2.4 3.8
17 11 14 14
<2 <2 <2 <2
<2 <2 <2 <2
<2 UJ <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
21 13 16 23
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
28 16 9.6 13
<2 <2 <2 <2
TR0795A Page 15 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
8 8 9 9
June 2020 August 2020 April 2019 June 2019
STW-LOC8-4-060520 STW-LOC-8-4-082620 DSTW-LOC9-042419 STW-LOC9-062819
6/3/2020 8/26/2020 04/24/2019 06/28/2019
TestAmerica TestAmerica TestAmerica TestAmerica
--------
240 J 96 29 77
260 J 470 8.8 J <21
98 J 200 17 J 20
34 J 50 4.5 J 5.9
19 J 17 3.6 J <7.9
26 J 17 <2 UJ <3.4
71 J 52 25 J <57
39 J 15 <20 UJ <20
13 J <2 28 J 2,300
140 J 77 3.4 J 120
120 J 18 50 J 110 J
640 J 200 83 J 190 J
4.1 J 2.1 <2 UJ <2
25 J 30 2.8 J 61
<2 UJ 5.8 11 J 57
4.2 J 6.1 <2 UJ 6.7
3.2 J 17 7.5 J 53 J
<2 UJ <2 <2 UJ <4.6
<2 UJ <2 2.8 J <6
<2 UJ <2 <2 UJ <4.1
970 1,000 140 2,600
1,700 1,300 280 3,000
<2 <2 <2.0 <2
<2 <2 ----
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <60 <6
<4 <4 <110 <11
<20 <20 <20 <20
<2 <2 ----
----<2.1 <2.1
<2 <2 ----
----<2.1 <2.1
<20 <20 <20 <20
<2 <2 <37 <3.7
<2 <2 <35 <3.5
<20 <20 <20 <20
5 4.2 2.2 3.7
5.9 5.8 6.9 9.2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
5.4 4.6 7.5 13
<2 --<2.0 <2
4.1 2.7 3.3 5.5
7.6 8.4 9 21
<2 <2 <2.0 <2
<2 <2 <2.0 2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
12 17 8.6 19
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
12 9.4 8.9 9.3
2 <2 14 15
TR0795A Page 16 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
9 9 9 9
August 2019 October 2019 December 2019 January 2020
STW-LOC9-082219 STW-LOC9-101019 STW-LOC-9-122019 STW-LOC9-012920
8/22/2019 10/10/2019 12/20/2019 1/29/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--------
55 2,400 28 B 59
25 J 38 J 14 14
28 500 14 14
5.9 160 5 4.1
2.3 45 3.8 J 3.6
<2 26 3.2 4.1
48 110 27 B 18
<20 27 <20 <20
86 170 6.6 160 J
8 50 <2 8.7
81 J 300 J 8.3 J 80 J
160 J 1,500 J 49 J 150 J
<2 7.6 <2 <2
11 63 <2 3.1
19 110 3.7 10
2.1 34 <2 2.6
17 J 91 J 3.5 J 10 J
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
290 3,700 110 300
550 5,600 170 540
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
41 <20 <20 <20
<2 <2 <2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
4.1 6.3 3.1 2.1
9.1 54 4.5 3.2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
19 38 9.7 4.8
<2 <2 <2 <2
6.1 9.2 3.3 2.8
26 55 16 6
<2 <2 <2 <2
<2 3 <2 UJ <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
27 94 12 9.8
<2 <2 <2 <2
<2 <2 <2 UJ 2.2
<2 <2 <2 UJ <2
8.9 12 6.7 4.3
15 16 7.8 6.2
TR0795A Page 17 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
9 9 9 10
April 2020 May/June 2020 August 2020 April 2019
STW-LOC-9-4-042820 STW-LOC-9-2-052120 STW-LOC-9-4-082620 DSTW-LOC10-042419
4/28/2020 5/20/2020 8/26/2020 4/24/2019
TestAmerica TestAmerica TestAmerica TestAmerica
--------
25 3,200 51 320
11 390 5.7 58 J
13 1,700 15 88 J
2.9 760 3.8 24 J
<2 430 <2 20 J
4 590 <2 9.1 J
25 1,000 40 260 J
<20 630 <10 97 J
49 2,000 100 78 J
2.3 400 8.9 19 J
21 J 2,600 J 58 190 J
85 J 970 J 320 280 J
<2 65 <2 <2 UJ
10 200 3.2 14 J
3.3 330 71 8.5 J
<2 81 55 8.5 J
<2 240 J 19 150 J
<2 <2.3 <2 <2 UJ
<2 <3 <2 <2 UJ
<2 <2 <2 <2 UJ
150 12,000 350 1,000
250 16,000 750 1,600
<2 <2 <2 <2.0
<2 <2 <2 --
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <60
<4 <4 <4 <110
<20 <20 <20 <20
<2 <2 <2 --
<2.1 ----<2.1
--<2 <2 --
<2.1 ----<2.1
<20 <20 <20 <20
<2 <2 <2 <37
<2 <2 <2 <35
<20 <20 <20 <20
3.8 3.1 4.3 2.1
6 57 6.2 10
<2 <2 <2 <2.0
<2 2 <2 <2.0
<2 <2 <2 <2.0
<2 <2 <2 <2.0
<2 <2 <2 <2.0
4.6 36 4.2 8.4
<2 <2 --<2.0
4.7 3.9 4.5 3.5
9.8 15 7.0 9.3
<2 <2 <2 <2.0
<2 8.8 <2 <2.0
<2 <2 <2 <2.0
<2 <2 <2 <2.0
<2 <2 <2 <2.0
12 220 13 17
<2 <2 <2 <2.0
<2 <2 <2 <2.0
<2 3.2 <2 <2.0
6.4 55 6.2 10
12 10 12 12
TR0795A Page 18 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
10 10 10 10
August 2019 October 2019 December 2019 January 2020
STW-LOC10-082219 STW-LOC10-101019 STW-LOC-10-122019 STW-LOC10-012920
8/22/2019 10/10/2019 12/20/2019 1/29/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--------
1,700 15,000 230 8,300
490 J 1,700 34 22,000
250 7,400 32 23,000
88 3,300 12 870
87 2,100 11 J 750
42 1,900 9.2 340
180 1,300 58 810
63 590 23 420
380 23,000 40 650
510 3,000 8.8 300
870 J 1,200 J 35 J 280 J
730 J 3,400 J 100 J 380 J
23 78 <2 11
460 270 7 180
62 680 8.5 110
72 930 4 140
280 J 570 J 38 J 170 J
<2 <9.2 <2 <9.2
<2 <12 <2 <12
<2 <8.2 <2 <8.2
4,400 61,000 480 58,000
6,300 66,000 650 59,000
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 2.1 <2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
4.4 <2 3.1 <2
23 170 5.4 56
<2 <2 <2 <2
<2 14 <2 <2
<2 <2 <2 <2
<2 2.4 <2 <2
<2 <2 <2 <2
23 33 8.8 17
<2 <2 <2 <2
6 <2 3.3 <2
29 41 15 19
<2 <2 <2 <2
2.5 22 <2 3.9
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
47 200 12 85
<2 <2 <2 <2
<2 <2 <2 <2
<2 14 <2 <2
48 26 6.6 17
15 9 8.3 3.9
TR0795A Page 19 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
10 10A 10A 11
May/June 2020 May/June 2020 August 2020 May/June 2020
STW-LOC-10-2-052120 STW-LOC-10A-2-052120 STW-LOC-10A-4-082620 STW-LOC-11-1-052120
5/20/2020 5/20/2020 8/26/2020 5/20/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--------
1,700 2,600 56 320
5,300 13,000 <4 46
630 1,100 15 580
440 580 2.4 16
340 450 <3 24
560 510 <3.9 47
<280 <570 <31 120
120 300 <10 47
230 1,100 160 11
150 410 12 20
480 J 1,800 J 34 230 J
170 J 700 J 340 38 J
11 44 <2 <2
210 540 2.6 7.3
25 140 72 <2
44 89 49 8.7
160 J 330 J 9.9 83 J
<23 <46 <2 <2
<30 <60 <2 <2
<20 <41 <2.4 <2
9,800 21,000 370 1,200
11,000 24,000 750 1,600
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
--------
<2 <2 <2 <2
--------
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<2 <2 4.3 <2
62 78 6.4 11
<2 <2 <2 <2
<2 <2 <2 2.8
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
7.1 18 3.8 6.5
<2 <2 --<2
<2 <2 4.2 5.6
11 17 7.4 4.8
<2 <2 <2 <2
2.8 5.4 <2 4.8
<2 <2 <2 UJ <2
<2 <2 <2 <2
<2 <2 <2 <2
37 120 12 17
<2 <2 <2 <2
<2 <2 <2 <2
<2 2.2 <2 <2
5.1 14 6.3 12
<2 3.5 12 63
TR0795A Page 20 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
12 12 12 12
August 2019 December 2019 May/June 2020 August 2020
STW-LOC12-082219 STW-LOC-12-122019 STW-LOC-12-2-052120 STW-LOC-12-4-082620
8/22/2019 12/20/2019 5/20/2020 8/26/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--------
17 15 B 77 21
<5 20 <5 12 J
14 14 44 21
2.6 2.4 4.6 3.6
<2 <2 2.6 <2
<2 3 5.7 <2
26 50 B 83 52
<20 <20 <20 <10
<2 <2 <2 <2
<2 <2 9 <2
9.2 J <2 53 J 23 J
3 J 15 J 6.9 J 4.1 J
<2 <2 <2 <2
4.9 2.4 4.2 11 J
<2 <2 <2 <2
<2 <2 <2 <2
3.5 J <2 6.3 J 7.4 J
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
65 110 230 120
80 120 300 160
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 <2.1 ----
----<2 <2
<2.1 <2.1 ----
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
6.5 4.5 4.3 6.9
15 6.8 6.3 8.3
<2 <2 <2 <2
2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
33 11 7.8 6.3
<2 <2 <2 --
8.5 5.5 5.9 6.5
37 19 13 12
<2 <2 <2 <2 UJ
2.9 <2 <2 2.1
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
37 14 15 14
<2 <2 <2 <2
<2 <2 <2 <2 UJ
<2 <2 <2 <2
16 6.9 9.6 11
22 15 13 19
TR0795A Page 21 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
12 13 14 14
August 2020 May/June 2020 April 2019 June 2019
STW-LOC-12-4-082620 STW-LOC-10A-2-052120 DSTW-LOC14-042419 STW-LOC14-062819
8/26/2020 5/20/2020 04/24/2019 06/28/2019
TestAmerica TestAmerica TestAmerica TestAmerica
Field Duplicate ------
20 640 12 22
12 50 67 J <5
22 53 10 J 15
3.9 22 2.1 J 2.5
<2 24 <2 UJ <2
<2 23 <2 UJ <2
52 190 15 J 22
<10 84 <20 UJ <20
<2 170 <2 UJ <2
<2 33 <2 UJ <2
<2 UJ 120 J 5.7 J <2
4.0 190 J 2.3 J 2.1 J
<2 <2 <2 UJ <2
<2 UJ 9.5 <2 UJ <2
<2 7 <2 UJ <2
<2 7 <2 UJ <2
<2 UJ 57 J 3.2 J <2
<2 <2 <2 UJ <2
<2 <2 <2 UJ <2
<2 <2 <2 UJ <2
120 1,300 110 62
160 1,700 120 64
<2 <2 <2.0 <2
<2 <2 ----
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <60 <2
<4 <4 <110 <2
<20 <20 <20 <20
<2 <2 ----
----<2.1 <2.1
<2 <2 ----
----<2.1 <2.1
<20 <20 <20 <20
<2 <2 <37 <2
<2 <2 <35 <2
<20 <20 <20 <20
6.5 <2 <2.0 5.7
8.1 13 4.7 13
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
6.1 7.6 3.1 24
--<2 <2.0 <2
6.2 <2 3 7.9
12 3.7 4.4 36
<2 <2 <2.0 <2
2.0 3 <2.0 2.3
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
14 45 3.8 28
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
10 9.9 5.8 14
18 2.2 11 22
TR0795A Page 22 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
14 14 14 14
August 2019 October 2019 December 2019 April 2020
STW-LOC14-082219 STW-LOC14-101019 STW-LOC-14-122019 STW-LOC-14-4-042820
8/22/2019 10/10/2019 12/20/2019 4/28/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--------
14 15 21 B 39
<5 <5 UJ 19 25
14 6.7 13 21
<2 <2 <2 4.4
<2 <2 <2 <2
<2 <2 UJ <2 5.4
33 23 68 34
<20 <20 25 <20
<2 <2 <2 <2
<2 <2 <2 2.1
5 J 2.4 J <2 8.6 J
<2 <2 9.3 J 17 J
<2 <2 <2 <2
3.8 6 <2 4.7
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
65 51 150 140
70 53 160 160
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 39 J <20
<2 <2 <2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
4.2 9.6 4.5 3.5
10 27 6.8 5.3
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
21 50 11 4.7
<2 <2 <2 <2
6.1 13 5.1 4.7
27 72 20 8.7
<2 <2 <2 <2
<2 2.2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 2.1 <2 <2
27 67 14 9.9
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
10 15 7.5 6.4
15 20 11 12
TR0795A Page 23 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
14 14 15 15
May/June 2020 August 2020 April 2019 June 2019
STW-LOC-14-1.33-
052120 STW-LOC-14-4-082620 DSTW-LOC15-042419 STW-LOC15-062819
5/20/2020 8/26/2020 04/24/2019 06/28/2019
TestAmerica TestAmerica TestAmerica TestAmerica
--------
120 19 34 45
<5 8.7 8.4 J 12
15 17 17 J 16
3.9 2.5 4 J 3.2
<2 <2 3.2 J <2
<2 <2 <2 UJ <2
57 51 35 J 25
<20 <10 <20 UJ <20
3.1 <2 22 J 880
3.3 <2 4.3 J 41
21 J <2 42 J 80 J
6.8 J 3.2 71 J 250 J
<2 <2 <2 UJ <2
3.8 8.9 3 J 23
<2 <2 9.5 J 22
<2 <2 <2 UJ 3.6
9.9 J <2 10 J 33 J
<2 <2 <2 UJ <2
<2 <2 <2 UJ <2
<2 <2 <2 UJ <2
210 #REF!140 1,100
240 #REF!260 1,400
<2 <2 <2.0 <2
<2 <2 ----
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <60 <2
<4 <4 <110 <2
<20 <20 <20 <20
<2 <2 ----
----<2.1 <2.1
<2 <2 ----
----<2.1 <2.1
<20 <20 <20 <20
<2 <2 <37 3.1
<2 <2 <35 <2
<20 <20 <20 <20
3.1 6.1 2.3 3.7
5.9 7.8 6.5 9.4
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
5.5 5.8 7.5 14
<2 --<2.0 <2
4.1 6.2 3.5 5.7
9.5 11 7.9 22
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
12 12 8.2 18
<2 <2 <2.0 <2
<2 <2 <2.0 <2
<2 <2 <2.0 <2
15 10 8.5 9.5
9.3 17 14 15
TR0795A Page 24 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
15 15 15 15
August 2019 October 2019 December 2019 January 2020
STW-LOC15-082219 STW-LOC15-101019 STW-LOC-15-122019 STW-LOC15-012920
8/22/2019 10/10/2019 12/20/2019 1/29/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--------
43 140 35 85
12 <5 UJ 15 120
22 32 13 140
5.3 16 5 8.2
2.2 16 3.9 6.5
<2 15 3.1 5.3
38 45 31 B 23
<20 <20 <20 <20
92 150 24 100
8.2 28 2.2 8.5
63 J 250 J 11 J 120 J
140 J 1,700 J 58 J 360 J
<2 3.6 <2 <2
12 35 2 5.4
22 62 4.3 7.9
2.1 21 <2 2.7
15 J 71 J 4.7 J 22 J
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
260 560 140 510
480 2,600 210 1,000
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
4.1 6.5 3 2.2
9.2 22 <2 2.4
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
20 37 8.7 4.7
<2 <2 <2 <2
5.9 8.9 3.4 2.6
26 51 14 5.5
<2 <2 <2 <2
<2 2.4 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
28 68 10 10
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
9.4 11 4.8 4
16 16 8.2 6.2
TR0795A Page 25 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
15 15 15 15
April 2020 May/June 2020 May/June 2020 August 2020
STW-LOC-15-4-042820 STW-LOC-15-2-052120 STW-LOC-15-2-052120-
D STW-LOC-15-4-082620
4/28/2020 5/20/2020 5/20/2020 8/26/2020
TestAmerica TestAmerica TestAmerica TestAmerica
----Field Duplicate --
36 3,000 3,000 51
14 2,700 2,700 <2
14 1,100 1,100 7.3
3.8 420 470 <2
2.6 300 230 <2
6.1 300 310 <2
27 680 680 <20
<20 460 460 <10
140 2,200 2,400 51
7 400 420 3.8
47 J 2,800 J 2,900 J 15
330 J 1,100 J 1,200 J 150
<2 77 81 <2
11 250 250 <2
4.1 410 410 27
<2 77 75 18
6.3 J 260 J 270 J 3.4
<2 <4.6 <4.6 <2
<2 <6 <6 <2
<2 <4.1 <4.1 <2
270 12,000 13,000 160
650 17,000 17,000 330
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 ------
--<2 <2 <2
<2.1 ------
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
3.7 2.5 2.8 4.2
7.9 53 57 6.8
<2 <2 <2 <2
<2 2 2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
5 32 36 4.1
<2 <2 <2 --
4.6 3.1 3.3 4.3
9.3 14 15 7.6
<2 <2 <2 <2
<2 6 6.4 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
12 240 260 13
<2 <2 <2 <2
<2 <2 <2 <2
<2 2.1 2.7 <2
6.1 26 28 6.4
11 8 8.9 12
TR0795A Page 26 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
18 18 18 18
June 2019 August 2019 August 2019 August 2019
STW-LOC-18-062719 STW-LOC18-082119-1 STW-LOC18-082119-2 STW-LOC18-082119-3
06/27/2019 8/21/2019 8/21/2019 8/21/2019
TestAmerica TestAmerica TestAmerica TestAmerica
--------
4.1 7.1 11 7.6
<5 UJ <5 <5 <5
2.4 J 2.2 4.4 3.8
<2 UJ <2 <2 <2
<2 UJ <2 <2 <2
<2 UJ <2 <2 <2
<10 UJ <10 UJ 18 21
<20 UJ <20 <20 <20
<2 UJ <2 2 <2
<2 UJ <2 <2 <2
<2 UJ 3.5 J 4.1 J 2.3 J
<2 UJ <2 <2 <2
<2 UJ <2 <2 <2
<2 UJ <2 UJ <2 4.4
<2 UJ <2 <2 <2
<2 UJ <2 <2 <2
<2 UJ <2 2.1 J 3.2 J
<2 UJ <2 <2 <2
<2 UJ <2 <2 <2
<2 UJ <2 <2 <2
6.5 9.3 35 37
6.5 13 42 42
<2 <2 <2 <2
--<2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<60 <2 <2 <2
<110 <4 UJ <4 <4
<20 <20 <20 <20
--<2 <2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<37 <2 <2 <2
<35 <2 <2 <2
<20 <20 <20 <20
<2 <2 <2 <2
<3.3 14 J 7.1 J 7.9
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 2
<2 <2 <2 <2
2.4 5.1 9.2 8.9
<2 UJ <2 UJ <2 UJ <2 UJ
<2 <2 2.6 2.5
3.5 5.2 11 12
<2 <2 <2 <2
<2 <2 <2 <2
<2 UJ <2 UJ <2 UJ <2 UJ
<2 <2 <2 <2
<2 <2 <2 <2
3.6 3.7 J 11 11
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 2.8 5.4 5.1
<2 <2 6.4 7.6
TR0795A Page 27 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
18 18 18 18
August 2019 October 2019 December 2019 January 2020
STW-LOC18-082119-4 STW-LOC18-100919 STW-LOC-18-122019 STW-LOC18-012920
8/21/2019 10/9/2019 12/20/2019 1/29/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--------
120 16 12 B 6 J
<5 <5 UJ <5 <5
20 5.5 J 3.9 J 3.7 J
5.1 <2 <2 <2
3.2 <2 <2 <2
<2 <2 UJ <2 <2 UJ
64 J <10 UJ 19 B <10 UJ
26 <20 <20 <20 UJ
5 <2 <2 <2
6.4 <2 <2 <2
53 J 13 J 7.7 J <2
22 J <2 6.2 J <2
<2 <2 <2 <2
6.4 <2 UJ <2 UJ <2 UJ
<2 <2 <2 <2
2.3 <2 <2 <2
26 J 2.4 J 5.2 J <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
260 22 35 9.7
360 37 54 9.7
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <49 <20
<2 <2 <2 <2
<4 UJ <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 <2.1 <2.1 <2.1 UJ
--------
<2.1 <2.1 <2.1 <2.1 UJ
<20 <20 <20 <20
<2 <2 UJ <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<2 <2 <2 <2
12 J 17 J <3.3 110 J
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
6.3 22 2.8 <2
<2 <2 UJ <8.3 <89 UJ
<2 5.4 <2 <2
7.6 29 3.2 <2 UJ
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 UJ <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
7.3 27 J 3.4 <49 UJ
<2 <2 UJ <2 <2 UJ
<2 <2 <2 <2
<2 <2 <2 <2
4.2 6.7 3.3 <2
4.1 10 2.8 <2
TR0795A Page 28 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
18 18 18 19A
April 2020 May/June 2020 August 2020 April 2019
STW-LOC-18-4-042820 STW-LOC18-4-060520 STW-LOC-18-4-082620 DSTW-LOC19A-042419
4/28/2020 6/3/2020 8/26/2020 04/24/2019
TestAmerica TestAmerica TestAmerica TestAmerica
--------
6.5 3.6 J 9.5 30 J
<5 <2 UJ <2 < 5 UJ
3.5 2.8 J 2.8 4.8 J
<2 <2 UJ <2 <2 UJ
<2 <2 UJ <2 <2 UJ
4.6 <2 UJ <2 <2 UJ
15 <13 UJ <20 27 J
<20 <2 UJ <10 <20 UJ
<2 <2 UJ <2 <2 UJ
<2 <2 UJ <2 <2 UJ
<2 <2 UJ 10 <2 UJ
3.1 J <2 UJ <2 <2 UJ
<2 <2 UJ <2 <2 UJ
<2 <2 UJ <2 <2 UJ
<2 <2 UJ <2 <2 UJ
<2 <2 UJ <2 <2 UJ
<2 <2 UJ <2 <2 UJ
<2 <2 UJ <2 <2 UJ
<2 <2 UJ <2 <2 UJ
<2 <2 UJ <2 <2 UJ
30 6.4 12 62
33 6.4 22 62
<2 <2 <2 <2.0
<2 <2 <2 --
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <60
<4 <4 <4 <110
<20 <20 <20 <20 UJ
<2 <2 <2 --
<2.1 ----<2.1 UJ
--<2 <2 --
<2.1 ----<2.1 UJ
<20 <20 <20 <20
<2 UJ <7.5 <2 <37 UJ
<2 <2 <2 <35 UJ
<20 <20 <20 <20
<2 <2 <2 <2.0 UJ
<2 <3 4.8 J 4.3 J
<2 <2 <2 <2.0 UJ
<2 <2 <2 <2.0 UJ
<2 <2 <2 <2.0 UJ
<2 <2 <2 <2.0 UJ
<2 <2 <2 <2.0 UJ
<2 <2 2.4 <2.0 UJ
<2 UJ <2 UJ --<2.0 UJ
<2 <2 <2 <2.0 UJ
2.1 2.4 2.3 <2.0 UJ
<2 <2 <2 <2.0 UJ
<2 <2 <2 <2.0 UJ
<2 UJ <2 UJ <2 UJ <2.0 UJ
<2 <2 <2 <2.0 UJ
<2 <2 <2 <2.0 UJ
2.6 2.9 3.3 2.6 J
<2 <2 UJ <2 <2.0 UJ
<2 <2 <2 <2.0 UJ
<2 <2 <2 <2.0 UJ
<2 2 2.5 2.6 J
4.3 3.3 4.4 <2.0 UJ
TR0795A Page 29 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
19A 19A 19A 19A
June 2019 August 2019 October 2019 December 2019
STW-LOC-19A-062719 STW-LOC19A-082119 STW-LOC19A-100919 STW-LOC-19A-122019
06/27/2019 8/21/2019 10/9/2019 12/20/2019
TestAmerica TestAmerica TestAmerica TestAmerica
--------
4.5 J 18 7.3 380
<5 UJ <5 <5 16
2.6 J 5.1 7.1 35
<2 UJ <2 <2 UJ 9.7
<2 UJ <2 <2 UJ 4 J
<2 UJ <2 <2 UJ <2
<10 UJ 21 19 340
<20 UJ <20 <20 180
<2 UJ 4.5 <2 <2
<2 UJ <2 <2 <2
<2 UJ <2 UJ <2 UJ <2
<2 UJ <2 <2 UJ 11 J
<2 UJ <2 <2 <2
<2 UJ <2 2.1 2.2
<2 UJ <2 <2 <2
<2 UJ <2 <2 2.4
<2 UJ <2 <2 UJ 4.1 J
<2 UJ <2 <2 <2
<2 UJ <2 <2 <2
<2 UJ <2 UJ <2 UJ <2 UJ
7.1 49 36 970
7.1 49 36 980
<2 <2 <2 <2
--<2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<60 <2 <2 <2
<110 <4 <4 <4
<20 UJ <20 <20 <20
--<2 <2 <2
<2.1 UJ <2.1 <2.1 <2.1
--------
<2.1 UJ <2.1 <2.1 <2.1
<20 <20 <20 <20
<37 <2 <2 <2
<35 <2 <2 <2
<20 <20 <20 <20
<2 <2 <2 <2
2.4 J 2.9 6 3.2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
3.3 J 5.1 9.5 3.5
<2 UJ <2 UJ <2 UJ <2
<2 <2 <2 <2
6.1 J 6.8 15 7.8
<2 <2 <2 <2
<2 <2 <2 3.1 B
<2 UJ <2 UJ <2 UJ <2
<2 <2 <2 <2
<2 <2 <2 <2
5.3 7.1 15 6.3
<2 UJ <2 <2 UJ <2
<2 <2 <2 46 B
<2 <2 <2 15 B
3.1 J 3.7 3.3 14
<2 2.4 2.5 <2
TR0795A Page 30 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
19A 19A 19A 19A
January 2020 April 2020 May/June 2020 August 2020
STW-LOC19A-012920 STW-LOC-19A-042820 STW-LOC19A-060320 STW-LOC-19A-082620
1/29/2020 4/28/2020 6/3/2020 8/26/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--------
19 J 5 51 J 4.2
8.7 J <5 <2 UJ 5.5
9.3 4 10 J 4.9
2.9 <2 3.4 J <2
<2 <2 2.5 J <2
<2 5.4 <2 UJ <2
27 13 34 J <20
<20 <20 9.6 J <10
2.3 3 <2 UJ 3.1
<2 <2 <2 UJ <2
<2 <2 22 J <2
4.8 J <2 17 J <2
<2 <2 <2 UJ <2
<2 <2 <2 UJ <2
<2 <2 <2 UJ <2
<2 <2 2 J <2
<2 <2 11 J <2
<2 <2 <2 UJ <2
<2 <2 <2 UJ <2
<2 <2 <2 UJ <2
69 30 110 18
74 30 160 18
<2 UJ <2 <2 <2
<2 UJ <2 <2 <2
<20 UJ <20 <20 <20
<20 UJ <20 <20 <20
<2 UJ <2 <2 <2
<4 UJ <4 <4 <4
<20 UJ <20 <20 <20
<2 UJ <2 <2 <2
<2.1 UJ <2.1 ----
----<2 <2
<2.1 UJ <2.1 ----
<20 UJ <20 <20 <20
<2 UJ <2 <2 <2
<2 UJ <2 <2 <2
<20 UJ <20 <20 <20
<2 UJ <2 2.4 <2
8.6 J <2 5.2 <2
<2 UJ <2 <2 <2
<2 UJ <2 <2 <2
<2 UJ <2 <2 <2
<2 UJ <2 <2 <2
<2 UJ <2 <2 <2
2.9 J <2 3.4 <2
<2 UJ <2 UJ <2 --
<2 UJ <2 <2 <2
4.3 J 2.7 5.5 2.5
<2 UJ <2 <2 <2
<2 UJ <2 <2 <2
<2 UJ <2 UJ <2 <2 UJ
<2 UJ <2 <2 <2
<2 UJ <2 <2 <2
3.2 J 3.2 5.5 2.9
<2 UJ <2 <2 <2
<2 UJ <2 <2 <2
<2 UJ <2 <2 <2
4.4 J <2 12 2.7
7 J <2 2.4 <2
TR0795A Page 31 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
19B 19B 19B 19B
April 2019 June 2019 August 2019 October 2019
DSTW-LOC19B-042419 STW-LOC-19B-062719 STW-LOC19B-082119 STW-LOC19B-100919
04/24/2019 06/27/2019 8/21/2019 10/9/2019
TestAmerica TestAmerica TestAmerica TestAmerica
--------
22 9.6 26 5.9
<5 UJ <5 UJ <5 <5
9.8 J 3.1 J 5.3 3.9
<2 UJ <2 UJ <2 <2
<2 UJ <2 UJ <2 <2 UJ
<2 UJ <2 UJ <2 <2 UJ
39 J <10 UJ 26 12
<20 UJ <20 UJ <20 <20
<2 UJ <2 UJ 5 <2
<2 UJ 21 J 2.6 2.2
6.5 J <2 UJ <2 <2 UJ
3.5 J <2 UJ <2 <2
<2 UJ <2 UJ <2 <2
<2 UJ <2 UJ 3 3.2
<2 UJ <2 UJ <2 <2
<2 UJ <2 UJ <2 <2
5.3 J <2 UJ <2 <2
<2 UJ <2 UJ <2 <2
<2 UJ <2 UJ <2 <2
<2 UJ <2 UJ <2 UJ <2 UJ
71 34 68 27
86 34 68 27
<2.0 <2 <2 <2
----<2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<60 <60 <2 <2
<110 <110 <4 <4
<20 <20 <20 <20
----<2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<37 UJ <37 <2 <2
<35 UJ <35 <2 <2
<20 <20 <20 <20
<2 <2 <2 2.3
4.4 3 4.6 7.2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
2.2 4 7.9 12
<2 <2 UJ <2 UJ 6.2 J
<2 <2 <2 2.3
3.4 6.8 11 18
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 UJ <2 UJ <2 UJ
<2 <2 <2 <2
<2 <2 <2 <2
3.6 6 11 18
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
4.9 3.1 30 4.4
3.2 2.2 2.1 3.4
TR0795A Page 32 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
19B 19B 19B 19B
December 2019 January 2020 April 2020 May/June 2020
STW-LOC-19B-122019 STW-LOC19B-012920 STW-LOC-19B-042820 STW-LOC19B-060320
12/20/2019 1/29/2020 4/28/2020 6/3/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--------
22 B 75 54 2.2 J
5.6 14 J 37 <2 UJ
4.3 230 26 2.7 J
<2 19 6.2 <2 UJ
<2 <2 2.5 J <2 UJ
<2 <2 6.1 <2 UJ
35 B 120 44 <13 UJ
<20 46 <20 <2 UJ
<2 2.9 <2 <2 UJ
<2 <2 4.3 <2 UJ
<2 <2 22 J <2 UJ
2.2 J 5.3 J 22 J <2 UJ
<2 <2 <2 <2 UJ
<2 <2 5.1 <2 UJ
<2 <2 <2 <2 UJ
<2 <2 2.3 <2 UJ
<2 <2 12 J <2 UJ
<2 <2 <2 <2 UJ
<2 <2 <2 <2 UJ
<2 UJ <2 <2 <2 UJ
67 510 190 4.9
69 510 240 4.9
<2 <2 <2 <2
<2 <2 <2 <3.2
<20 <20 <20 <20
<20 <20 <20 <52
<2 <2 <2 <8.5
<4 <4 <4 <14
<20 <20 <20 <20
<2 <2 <2 <2.4
<2.1 <2.1 <2.1 --
------<2
<2.1 <2.1 <2.1 --
<20 <20 <20 <20
<2 <2 <2 <8.7
<2 <2 <2 <4.3
<20 <20 <20 <31
<2 <2 3.6 <2
2.2 5.9 5.6 3.7
<2 <2 <2 <3.2
<2 <2 <2 <3.1
<2 <2 <2 <4.5
<2 <2 <2 <5.5
<2 <2 <2 <2
2.7 3.5 5.1 <2.5
<2 UJ <2 <2 <8.9 UJ
<2 <2 2.8 3.7
5.2 5.8 9.1 <5.8
<2 <2 <2 <2
<2 <2 <2 <2.7
<2 UJ <2 <2 <4.6 UJ
<2 <2 <2 5.2
<2 <2 <2 <3
3.9 7.9 9.8 6.6
<2 <2 <2 <2.9 UJ
<2 <2 <2 <13
<2 <2 <2 <11
<2 3.2 9.6 <8.5
2.4 <2 4.7 7.8
TR0795A Page 33 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
19B 20 20 20
August 2020 April 2019 April 2019 June 2019
STW-LOC-19B-082620 DSTW-LOC20-042419 DSTW-LOC20-042419-D STW-LOC20-062819
8/26/2020 04/24/2019 04/24/2019 06/28/2019
TestAmerica TestAmerica TestAmerica TestAmerica
----Field Duplicate --
4.7 61 63 50
<2 53 J 56 J 48
6.2 30 J 31 J 28
<2 6.9 J 6.7 J 9.3
<2 3.7 J 3.5 J 8.7
<2 <2 UJ <2 UJ 20
<20 37 J 35 J 30
<10 <20 UJ <20 UJ <20
<2 5.3 J 5.5 J 260
<2 7.8 J 7.9 J 110
<2 28 J 27 J 69 J
<2 68 J 68 J 390 J
<2 <2 UJ <2 UJ 2
<2 2.9 J 2.4 J 14
<2 2 J <2 UJ 7.3
<2 <2 UJ <2 UJ <2
<2 6.6 J 7.8 J 12 J
<2 <2 UJ <2 UJ <2
<2 <2 UJ <2 UJ <2
<2 <2 UJ <2 UJ <2
11 210 210 590
11 310 310 1,100
<2 <2.0 <2.0 <2
<2 UJ ------
<20 <20 <20 <20
<20 <20 <20 <20
<2 <60 <60 <2
<4 <110 <110 <2
<20 <20 <20 <20
<2 UJ ------
--<2.1 <2.1 <2.1
<2 UJ ------
--<2.1 <2.1 <2.1
<20 <20 <20 <20
<2 UJ <37 <37 <2
<2 UJ <35 <35 <2
<20 <20 <20 <20
<2 2.2 2.2 3.8
2.2 6.5 5.9 8.8
<2 <2.0 <2.0 <2
<2 <2.0 <2.0 <2
<2 UJ <2.0 <2.0 <2
<2 <2.0 <2.0 <2
<2 UJ <2.0 <2.0 <2
<2 7.1 7 15
<8 <2.0 <2.0 <2
<2 UJ 3.5 3.5 5.8
2.9 7.8 7.7 23
<2 UJ <2.0 <2.0 <2
<2 UJ <2.0 <2.0 <2
<2 <2.0 UJ <2.0 <2
<2 UJ <2.0 <2.0 <2
<2 <2.0 <2.0 <2
3.9 6.7 7.6 17
<2 UJ <2.0 <2.0 <2
<2 <2.0 <2.0 <2
<2 <2.0 <2.0 <2
3.4 J 8.7 8.5 9.3
2.1 J 13 13 15
TR0795A Page 34 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
20 20 20 20
August 2019 August 2019 October 2019 October 2019
STW-LOC20-082219 STW-LOC20-082219-D STW-LOC20-101019 STW-LOC20-100919-D
8/22/2019 8/22/2019 10/10/2019 10/10/2019
TestAmerica TestAmerica TestAmerica TestAmerica
--Field Duplicate --Field Duplicate
49 J 71 J 30 J 34
650 J 630 24 J 21 J
210 J 210 18 19
71 71 5.7 5.7
44 46 4.3 4.6
19 22 7.6 J 7.3 J
39 46 34 27
<20 <20 <20 <20
39 40 17 16
70 67 46 41
63 J 74 J 31 J 18 J
540 J 640 J 190 J 160 J
<2 <2 <2 <2
28 28 13 J 8.7 J
8.6 8.3 3.8 3.3
6.4 6.3 <2 <2
11 J 12 J 6.9 J 5.4 J
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
1,200 1,200 200 190
1,800 2,000 430 370
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
4.2 4.2 6.3 6.2
10 10 19 24
<2 <2 <2 <2
<2 <2 <2 UJ 19 J
<2 <2 <2 <2
<2 <2 <2 3
<2 <2 <2 <2
20 20 34 J 100 J
<2 <2 <2 <2
5.9 6.3 8.6 8.7
26 27 48 J 92 J
<2 <2 <2 <2
<2 <2 <2 UJ 40 J
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
27 26 47 65
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 8.3
10 9.5 11 J 50 J
14 14 15 14
TR0795A Page 35 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
20 20 20 20
December 2019 December 2019 January 2020 January 2020
STW-LOC-20-122019 STW-LOC-20-122019-D STW-LOC20-012920 STW-LOC20-012920-D
12/20/2019 12/20/2019 1/29/2020 1/29/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--Field Duplicate --Field Duplicate
42 47 89 J 66 J
22 20 35 J 31
11 11 37 36
2.7 2.8 3.1 3
<2 <2 2.1 2.1
2.2 <2 <2 <2
33 B 32 B 27 31
<20 <20 <20 <20
5.3 5.5 18 18
2.2 2.1 2.9 2.8
7.7 J 6.3 J 21 J 22 J
49 J 44 J 85 J 82 J
<2 <2 <2 <2
2.4 2.2 2.6 2.3
<2 <2 <2 <2
<2 <2 <2 <2
4 J 3.3 J <2 7.5 J
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
120 120 220 190
180 180 320 300
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
3 3 2.2 2.2
5.4 4.5 3.8 3.2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
8.8 8.8 4.1 4
<2 <2 <2 <2
3.2 3.4 2.5 2.5
15 15 5.5 5.6
<2 <2 <2 <2
<2 <2 <2 <2
<2 UJ <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
11 11 5.9 5.7
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
5.7 5.9 4.3 4.2
7.9 8 6.6 6.5
TR0795A Page 36 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
20 20 20 20
April 2020 April 2020 May/June 2020 August 2020
STW-LOC-20-4-042820 STW-LOC-20-4-042820-
D STW-LOC-20-2-052120 STW-LOC-20-4-042820
4/28/2020 4/28/2020 5/20/2020 8/26/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--Field Duplicate ----
41 41 940 57
14 13 850 <2
13 13 330 14
2.5 2.7 130 3.2
<2 <2 69 <2
5.6 5.3 75 <2
31 30 200 <20
<20 <20 120 <10
30 32 720 24
3.2 3.2 310 4.0
18 J 16 J 780 J 12
93 J 91 J 440 J 86
<2 <2 20 <2
6.7 6.5 71 <2
<2 <2 150 12
<2 <2 20 9.6
3.8 J <2 71 J 4.8
<2 <2 <2.3 <2
<2 <2 <3 <2
<2 <2 <2 <2
150 150 4,000 150
260 250 5,300 260
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 <2.1 ----
----<2 <2
<2.1 <2.1 ----
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
3.5 3.6 3.9 4.1
6.1 6.3 20 6.0
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
4.8 4.6 13 3.8
<2 <2 <2 --
4.5 4.5 4.9 4.2
9 9.2 12 7.1
<2 <2 <2 <2
<2 <2 2.5 <2
<2 UJ <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
11 11 77 10
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
6.1 6 27 6.2
11 11 11 11
TR0795A Page 37 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
21A 21A 21A 21A
April 2019 June 2019 August 2019 October 2019
DSTW-LOC21A-042419 STW-LOC-21A-062719 STW-LOC21A-082119 STW-LOC21A-100919
04/24/2019 06/27/2019 8/21/2019 10/9/2019
TestAmerica TestAmerica TestAmerica TestAmerica
--------
33 40 57 97
11 J 12 J 9.5 J 11 J
16 J 15 J 13 28
2.9 J 2.9 J 2.4 12
2 J <2 UJ <2 9.6
<2 UJ <2 UJ 2.2 6.6
43 J 33 J 53 71
<20 UJ <20 UJ <20 25
2.1 J 9.7 J 12 7.7
<2 UJ 2.2 J 4.9 4.3
4.2 J 19 J 31 J 32 J
4.1 J 11 J 25 J 17 J
<2 UJ <2 UJ <2 <2
<2 UJ 2.5 J 33 8.4
<2 UJ <2 UJ <2 7.4
<2 UJ <2 UJ 3.8 3.9
3.4 J 4.1 J 34 J 19 J
<2 UJ <2 UJ <2 <2
<2 UJ <2 UJ <2 <2
<2 UJ <2 UJ <2 <2
110 120 190 290
120 150 280 360
<2.0 <2 <2 <2
----<2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<60 <60 <2 <2
<110 <110 <4 <4
<20 <20 <20 <20
----<2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<37 UJ <37 <2 <2
<35 UJ <35 <2 <2
<20 <20 <20 <20
2 4 4.5 6.8
5 9.8 12 17
<2.0 <2 <2 <2
<2.0 <2 <2 <2
<2.0 <2 <2 <2
<2.0 <2 <2 <2
<2.0 <2 <2 <2
3 14 23 31
<2.0 <2 <2 <2
3 6.2 6 9.8
4.4 23 29 41
<2.0 <2 <2 <2
<2.0 <2 <2 2
<2.0 <2 <2 <2
<2.0 <2 <2 <2
<2.0 <2 <2 <2
4.8 21 30 40
<2.0 <2 <2 <2
<2.0 <2 <2 <2
<2.0 <2 <2 <2
5.6 9.8 10 12
9.1 14 16 23
TR0795A Page 38 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
21A 21A 21A 21A
December 2019 January 2020 April 2020 May/June 2020
STW-LOC-21A-122019 STW-LOC21A-012920 STW-LOC-21A-042820 STW-LOC-21A-052120
12/20/2019 1/29/2020 4/28/2020 5/20/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--------
43 31 220 420
21 15 J 27 110
16 15 28 170
2.6 2.1 5.8 31
<2 <2 2.1 J 50
2.5 <2 7.8 460
54 B 34 43 180
23 <20 <20 48
2.7 <2 <2 75
<2 <2 <2 220
7.3 J <2 16 J 1,100 J
12 J 8.7 J 16 J 33 J
<2 <2 <2 18
2.1 <2 3.7 37
<2 <2 <2 5.2
<2 <2 <2 12
5 J <2 3.4 J 77 J
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
170 97 340 1,800
190 110 370 3,000
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 <2.1 <2.1 --
------<2
<2.1 <2.1 <2.1 --
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
2.4 2.6 3.7 2.2
5 5.2 27 11
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
6.2 5.2 5.3 7.6
<2 <2 <2 <2
3.3 3.3 4.5 3.1
10 8.2 11 7.7
<2 <2 <2 <2
<2 <2 <2 2.7
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
8.8 7.9 12 33
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
4 4.7 6.8 4.8
9.4 6.9 17 9.8
TR0795A Page 39 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
21A 22 22 22
August 2020 April 2019 June 2019 August 2019
STW-LOC-21A-082620 DSTW-LOC22-042419 STW-LOC-22-062719 STW-LOC22-082119
8/26/2020 04/24/2019 06/27/2019 8/21/2019
TestAmerica TestAmerica TestAmerica TestAmerica
--------
16 170 130 J 140
<2 <5 UJ 220 J 36 J
14 <2 UJ 540 J 45 J
2.2 3 J 27 J 5.5
<2 5.3 J 32 J 6.5
<2 <2 UJ <6.7 UJ 3.8 J
23 67 J 1,500 J 20 J
<10 <20 UJ 210 J <20
<2 2 J 180 J 47
<2 18 J 150 J 54
<2 160 J 500 J 59 J
4.2 170 J 13,000 J 770 J
<2 <2 UJ 23 J <2
<2 11 J 65 J 13 J
<2 <2 UJ <4.9 UJ <2
<2 2.1 J <5.6 UJ 3.9
<2 5.2 J 54 J 7.5 J
<2 <2 UJ <9.2 UJ <2
<2 <2 UJ <12 UJ <2
<2 <2 UJ <8.2 UJ <2 UJ
55 280 3,100 370
59 610 17,000 1,200
<2 <2.0 <2 <2
<2 ----<2
<20 <52 <20 <20
<20 <20 <20 <20
<2 <60 <60 <2
<4 <110 <110 <4
<20 <20 <20 <20
<2 ----<2
--<2.1 <2.1 UJ <2.1
<2 ------
--<2.1 <2.1 UJ <2.1
<20 <20 <20 <20
<2 <37 UJ <37 <2
<2 <35 UJ <35 <2
<20 <31 <20 <20
4.6 <2.0 3.4 <2
5.8 <3.5 UJ 37 J 5.4 J
<2 <3.2 <2 <2
<2 <3.1 2.4 <2
<2 <4.5 <2 <2
<2 <5.5 <2 <2
<2 <2.0 <2 <2
3.6 7.1 12 6.7
<2 <8.9 <2 <2
4.2 4.5 5.6 <2
7.3 <5.8 21 J 6.9
<2 <2.0 <2 <2
<2 <2.7 2.3 <2
<2 <4.6 <2 <2
<2 <3.5 <2 <2
<2 <3.0 <2 <2
9.1 20 22 J 8
<2 2.9 <2 <2
<2 <13 <2 <2
<2 <11 <2 <2
6.5 <8.5 9.8 7.5
5.4 <5.4 18 3.6
TR0795A Page 40 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
22 22 22 22
October 2019 October 2019 December 2019 January 2020
STW-LOC22-100919 STW-LOC22-100919-D STW-LOC-22-122019 STW-LOC22-012920
10/9/2019 10/9/2019 12/20/2019 1/29/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--Field Duplicate ----
27 27 <14 <150
37 J 56 J 25 J <5 UJ
21 23 12 J 10 J
7.2 8.1 5 3.5
6.7 8.5 4.1 J 3
7.1 J 14 J 2.3 J <2 UJ
40 37 <10 UJ <10 UJ
<20 <20 <20 UJ <20
70 73 25 J 58
63 J 130 J 25 J 18
18 J 26 J 28 J 40 J
210 J 300 J 490 J 260 J
<2 2.3 <2 <2
12 15 2.3 J <2 UJ
2.1 2.6 <2 <2
2.5 2.8 <2 <2
5 J 4.5 J 3 J <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 UJ <2
300 400 100 93
530 730 620 390
<2 <2 <2 <19
<2 <2 <2 <32
<20 <20 <20 <200
<20 <20 <20 <520
<2 <2 <2 <85
<4 <4 <4 <140
<20 <20 <20 <200
<2 <2 <2 <24
<2.1 <2.1 <2.1 <19
--------
<2.1 <2.1 <2.1 <19
<20 <20 <20 <190
<2 <2 <2 <87
<2 <2 <2 <43
<20 <20 <20 <310
3.7 3.6 <2 <20
16 J 18 J 130 J 79
<2 <2 <2 <32
<2 <2 <2 <31
<2 <2 <2 <45
<2 <2 <2 <55
<2 <2 <2 <19
24 24 4.1 J <25
<2 <2 <2 UJ <89
6.1 6.2 <2 28
34 33 <2 UJ <58
<2 <2 <2 <16
<2 2 <2 <27
<2 <2 <2 UJ <46
<2 <2 <2 <35
<2 <2 <2 <30
32 32 <2 UJ <49
<2 <2 <2 <29
<2 <2 <2 <130
<2 <2 <2 <110
8.4 8.4 4.5 <85
12 11 3.4 J <54
TR0795A Page 41 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
22 22 22 23A
April 2020 May/June 2020 August 2020 April 2019
STW-LOC-22-4-042820 STW-LOC22-4-060520 STW-LOC-22-4-082620 DSTW-LOC23A-042419
4/28/2020 6/3/2020 8/26/2020 04/24/2019
TestAmerica TestAmerica TestAmerica TestAmerica
--------
34 27 J 99 J 270
56 110 J <2 1,300
23 14 J 16 480
7.6 4.9 J 5.6 140
9.6 4 J 7.6 <79
3.7 <2 UJ 6.4 <34
11 37 J <20 700
<20 4.8 J <10 <47
67 86 J 19 2,700
30 34 J 59 140
12 J 30 J 270 180 J
370 J 640 J 1,200 2,200 J
<2 <2 UJ 2.7 <15
9.5 7.6 J 14 <54
<2 <2 UJ 33 65
2 3.6 J 14 32
2.6 J 3.4 J 330 <70
<2 <2 UJ <2 <46
<2 <2 UJ <2 <60
<2 <2 UJ <2 <41
250 330 280 5,800
640 1,000 2,100 8,200
<2 <2 <2 <2.0
<2 <3.2 <2 --
<20 <20 <20 <20
<26 <52 <20 UJ <20
<4.3 <8.5 <2 <60
<7 <14 <4 <110
<20 <20 <20 <20
<2 <2.4 <2 --
<2.1 ----<2.1
--<2 <2 --
<2.1 ----<2.1
<20 <20 <20 <20
<4.4 <8.7 <2 <37
<2.2 <4.3 <2 <35
<20 <31 <20 <20
<2 <2 2.4 <2.0
15 6.3 <2 R 160
<2 <3.2 <2 <2.0
<2 <3.1 <2 <2.0
<2.3 <4.5 <2 <2.0
<2.8 <5.5 <2 <2.0
<2 <2 <2 <2.0
3.1 <2.5 2.1 3.6
<4.5 UJ <8.9 UJ --<2.0
3.2 4.8 <2 2
<2.9 <5.8 3.7 J 6.6
<2 <2 <2 <2.0
<2 <2.7 <2 <2.0
<2.3 UJ <4.6 UJ <2 UJ <2.0
<2 <3.5 <2 <2.0
<2 <3 <2 <2.0
8 7.6 15 J 13
<2 <2.9 UJ <2 <2.0
<6.5 <13 <2 <2.0
<5.5 <11 <2 <2.0
6.7 8.6 4.0 20
<2.7 6.5 4.7 2.9
TR0795A Page 42 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
23A 23A 23A 23A
June 2019 August 2019 August 2019 August 2019
STW-LOC-23A-062719 STW-LOC23A-082119-1 STW-LOC23A-082119-2 STW-LOC23A-082119-3
06/27/2019 8/21/2019 8/21/2019 8/21/2019
TestAmerica TestAmerica TestAmerica TestAmerica
--------
170 11,000 25,000 15,000
320 1,200 1,300 1,600
240 280 350 390
87 73 110 110
<79 26 48 46
<34 UJ 11 22 19
1,300 82 120 <110
560 33 54 45
17,000 4,500 12,000 12,000
740 210 570 520
220 J 190 J 400 J 350 J
2,900 J 3,800 J 7,400 J 7,000 J
19 2 3.3 3.5
<54 49 100 94
110 52 150 130
28 23 61 52
<70 16 J 25 J 27 J
<46 <2.3 <9.2 <9.2
<60 <3 <12 <12
<41 <2 <8.2 <8.2
21,000 18,000 40,000 30,000
24,000 22,000 48,000 37,000
<2 <2 <2 <2
--<3.1 <3.1 <3.2
<20 <20 <20 <20
<20 <51 <50 <52
<60 <3 <12 <12
<110 <14 <13 <14
<20 <20 <20 <20
--<2.4 <2.3 <2.4
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<37 <2 <7.5 <7.5
<35 <2 <6.9 <6.9
<20 <30 <30 <31
3.8 3.5 3.7 3.5
70 55 54 51
<2 <3.1 <3.1 <3.2
2.8 <3 <3 <3.1
<2 <4.4 <4.3 <4.5
6.9 <5.4 <5.3 <5.5
<2 <2 <2 <2
14 24 25 26
42 <8.7 <8.6 <8.8
5.8 6.2 6 6.1
24 26 26 24
<2 <2 <2 <2
2.9 3.5 5.2 5
21 <4.5 <4.4 <4.6
<2 <3.4 <3.4 <3.5
<2 <2.9 <2.9 <3
29 31 34 34
30 <2.8 <2.8 <2.9
16 <13 <13 <13
4.3 <11 <11 <11
30 290 460 380
19 23 33 33
TR0795A Page 43 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
23A 23A 23A 23A
August 2019 October 2019 December 2019 January 2020
STW-LOC23A-082119-4 STW-LOC23A-100919 STW-LOC-23A-122019 STW-LOC23A-012920
8/21/2019 10/9/2019 12/20/2019 1/29/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--------
12,000 110 2,200 190
1,200 890 1,100 500 J
310 200 240 130
92 70 80 46
42 44 37 29
21 J 31 20 13
<110 <57 <57 33
42 20 33 <20
12,000 11,000 6,900 4,400
530 570 330 200
350 J 340 J 260 J 140 J
7,000 J 5,900 J 3,500 J 2,000 J
3.1 2.9 <2 <2
89 61 39 19
130 88 83 52
52 71 63 25
23 J 34 J 26 J 20 J
<9.2 <4.6 <4.6 <2.3
<12 <6 <6 <3
<8.2 <4.1 <4.1 <2
27,000 13,000 11,000 5,600
34,000 19,000 15,000 7,800
<2 <2 <2 <2
<3.1 <2 <2 <2
<20 <20 <20 <20
<50 <20 <20 <20
<12 3.3 2.8 <2
<13 <4 <4 <4
<20 <20 <20 <20
<2.3 <2 <2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<7.5 <2 <2 <2
<6.9 <2 <2 <2
<30 <20 <20 <20
3.9 6.7 2.3 3
49 18 180 45
<3.1 <2 <2 <2
5.1 4 2.4 <2
<4.3 <2 <2 <2
<5.3 4 <2 <2
<2 <2 <2 <2
23 31 15 9.1
<8.5 10 8.1 3.3
6.5 12 3.8 4
27 37 17 12
<2 <2 <2 <2
4.8 3.4 2.1 B <2
<4.4 6.8 4.9 <2
<3.3 2.1 <2 <2
<2.9 <2 <2 <2
32 43 18 13
<2.8 8 6.4 3.6
<12 6.9 5.2 B 2.4
<11 3.2 <2 <2
310 52 680 43
32 27 11 9.7
TR0795A Page 44 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
23A 23A 23A 23B
April 2020 May/June 2020 August 2020 June 2019
STW-LOC-23A-4-042820 STW-LOC23A-4-060520 STW-LOC-23A-2-082620 STW-LOC-23B-062719
4/28/2020 6/3/2020 8/26/2020 06/27/2019
TestAmerica TestAmerica TestAmerica TestAmerica
--------
130 870 J 69 3,200
1,000 1,800 J 520 160 J
230 400 J 110 150 J
65 180 J 44 67 J
20 69 J <30 61 J
<2 50 J <39 77 J
41 <150 UJ <310 19,000 J
<20 20 J <10 8,500 J
4,900 24,000 J 6,000 49 J
190 1,200 J 230 110 J
89 J 400 J 160 580 J
1,800 J 8,800 J 2,500 450 J
<2 5 J <8.7 4.5 J
26 100 J 24 33 J
30 190 J 47 5.1 J
8.9 54 J 7.4 21 J
5.6 J 19 J <36 210 J
<2.3 <2 UJ <3.4 <9.2 UJ
<3 <6.6 UJ <13 <12 UJ
<2 <12 UJ <24 <8.2 UJ
6,600 29,000 7,100 31,000
8,500 38,000 9,700 33,000
<2 <2 <2 <3.5
<2 <2 <2 --
<20 <20 <20 <37
<20 <20 <20 <20
<2 <2 2.9 <60
<4 <4 <4 <110
<20 <20 <20 20 J
<2 <2 <2 --
<2.1 ----<2.1
--<2 <2 --
<2.1 ----<2.1
<20 <20 <20 <20
<2 <2 <2 <37
<2 <2 <2 <35
<20 20 <20 <20
3.7 2.3 4.4 2.5
26 23 20 580
<2 <2 <2 <2
<2 4.8 2.0 <2
<2 <2 <2 <2
3.9 7.8 4.1 <2
<2 <2 <2 <2
6.4 8.3 4.6 10
3.8 6.4 --<2 UJ
4 3.8 3.8 <2
11 13 8.3 12
<2 <2 <2 <2
<2 3.1 <2 2.5
2.5 2 <2 <2 UJ
<2 <2 2.1 <2
<2 <2 <2 <2
15 20 11 68
3.9 9 3.4 <2 UJ
3.3 6.8 3.7 <2
2.8 6.1 2.4 <2
93 110 23 29
13 17 17 5
TR0795A Page 45 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
23B 23B 23B 23B
October 2019 December 2019 January 2020 April 2020
STW-LOC23B-100919 STW-LOC-23B-122019 STW-LOC23B-012920 STW-LOC-23B-042820
10/9/2019 12/20/2019 1/29/2020 4/28/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--------
17 240 31 35
200 13 11 J 19
56 7.3 7 15
19 <2 <2 2.9
10 <2 <2 <2
8.5 J <2 <2 4.1
<28 24 B 26 32
<20 <20 <20 <20
2,700 25 37 36
120 <2 <2 <2
100 J <2 <2 <2
1,700 J 26 J 34 J 19 J
<2 <2 <2 <2
20 <2 <2 4.2
20 <2 <2 <2
14 <2 <2 <2
10 J <2 <2 2.2 J
<2.3 <2 <2 <2
<3 <2 <2 <2
<2 <2 <2 <2
3,200 310 110 150
5,000 340 150 170
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
5.4 2.7 2 3.5
18 4 3.3 5.3
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
30 6.6 2.9 4.2
<2 <2 <2 <2
6.8 3.2 <2 3.9
43 12 3.8 8.2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
40 8.2 4 9.2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
13 26 12 8.6
14 7.9 5.3 9.3
TR0795A Page 46 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
23B 23B 24A 24A
May/June 2020 August 2020 April 2019 April 2019
STW-LOC23B-060320 STW-LOC-23B-082620 DSTW-LOC24A-042419 DSTW-LOC24A-042419-
D
6/3/2020 8/26/2020 4/24/2019 4/24/2019
TestAmerica TestAmerica TestAmerica TestAmerica
------Field Duplicate
57 25 16 J 14
3.7 <2 7.5 J <5 UJ
6.3 18 9.9 J 12 J
<2 2.8 <2 UJ <2 UJ
<2 <2 <2 UJ <2 UJ
<2 <2 <2 UJ <2 UJ
31 32 25 J 26 J
<2 <10 <20 UJ <20 UJ
32 33 <2 UJ <2 UJ
<2 2.0 <2 UJ <2 UJ
<2 <2 3.6 J 5.4 J
14 J 35 2.7 J 3.1 J
<2 <2 <2 UJ <2 UJ
<2 <2 <2 UJ <2 UJ
<2 <2 <2 UJ <2 UJ
<2 <2 <2 UJ <2 UJ
<2 <2 4 J 4.2 J
<2 <2 <2 UJ <2 UJ
<2 <2 <2 UJ <2 UJ
<2 <2 < UJ <2 UJ
130 110 58 52
140 150 69 65
<2 <2 <2.0 <2.0
<2 <2 ----
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <60 <60
<4 <4 <110 <110
<20 <20 <20 <20
<2 <2 ----
----<2.1 <2.1
<2 <2 ----
----<2.1 <2.1
<20 <20 <20 <20
<2 <2 <37 UJ <37 UJ
<2 <2 <35 UJ <35 UJ
<20 <20 <20 <20
3.1 4.4 2.3 2.3
5.2 5.5 6.3 5.8
<2 <2 <2.0 <2.0
<2 <2 <2.0 <2.0
<2 <2 <2.0 <2.0
<2 <2 <16 <2.0
<2 <2 <2.0 <2.0
3.4 3.6 7 7.3
<2 <2 <2.0 <2.0
2.6 4.0 3.9 3.8
6.8 7.5 8.5 8.8
<2 <2 <2.0 <2.0
<2 <2 2 <2.0
<2 <2 <2.0 <2.0
<2 <2 <2.0 <2.0
<2 <2 <2.0 <2.0
5.8 7.9 7 6.7
<2 <2 <5.9 <2.0
<2 <2 <14 <2.0
<2 <2 <2 <2.0
7.3 6.9 9.5 9.7
9.4 12 25 21
TR0795A Page 47 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
24A 24A 24A 24A
June 2019 June 2019 August 2019 August 2019
STW-LOC-24A-062719 STW-LOC-24A-062719-
D STW-LOC24A-082119 STW-LOC24A-082119-D
06/27/2019 06/27/2019 8/21/2019 8/21/2019
TestAmerica TestAmerica TestAmerica TestAmerica
--Field Duplicate --Field Duplicate
26 26 16 17
<5 UJ <5 UJ 11 12
14 J 14 J 12 13
2.3 J 2.3 J <2 2.1
<2 UJ <2 UJ <2 <2
<2 UJ <2 UJ <2 <2
30 J 30 J 26 28
<20 UJ <20 UJ <20 <20
2.2 J 2.2 J <2 <2
<2.2 J <2.2 J <2 <2
4.4 J 4.4 J 9.7 J 11 J
<2 UJ <2 UJ 4 J 4.2 J
<2 UJ <2 UJ <2 <2
2 J 2 J 4.7 5.3
<2 UJ <2 UJ <2 <2
4.4 J 4.4 J <2 <2
2.3 J 2.3 J 4.5 J 3.9 J
<2 UJ <2 UJ <2 <2
<2 UJ <2 UJ <2 <2
<2 UJ <2 UJ <2 <2
81 81 70 77
88 88 88 97
<2 <2 <2 <2
----<2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<60 <60 <2 <2
<110 <110 <4 <4
<20 <20 <20 <20
----<2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<37 <37 <2 <2
<35 <35 <2 <2
<20 <20 <20 <20
3.4 3.4 4.1 3.7
9.4 9.4 9.3 9
<2 <2 <2 <2
2.2 2.2 2.5 2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
13 13 19 18
<2 <2 <2 <2
6 6 6 5.8
21 21 26 26
<2 <2 <2 <2
2.7 2.7 2.7 2.1
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
17 17 25 27
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
11 J 11 J 11 10
30 J 30 J 27 J 22 J
TR0795A Page 48 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
24A 24A 24A 24A
December 2019 January 2020 January 2020 April 2020
STW-LOC-24A-122019 STW-LOC24A-012920 STW-LOC24A-012920-D STW-LOC-24A-042820
12/20/2019 1/29/2020 1/29/2020 4/28/2020
TestAmerica TestAmerica TestAmerica TestAmerica
----Field Duplicate --
18 B 11 8.7 10
12 9.9 J 9.3 7.1
6.1 6.5 6.2 8.8
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 4.6
41 B 46 47 27
22 23 25 <20
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 10 J
12 J 5.4 J 5.2 J 4 J
<2 <2 <2 <2
<2 <2 <2 5.3
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
99 96 96 63
110 100 100 77
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
3.1 2.1 2 3.6
<2 4.5 4.2 7.6
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 UJ <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
8.6 3.8 3.5 4.8
<2 <2 <2 <2
4.4 2.5 2.4 4.8
15 5.4 5.1 9
<2 <2 <2 <2
2.8 B <2 <2 <2
<2 <2 <2 <2 UJ
<2 <2 <2 <2
<2 <2 UJ <2 <2
10 4.8 4.5 10
<2 <2 <2 <2
16 B <2 <2 <2
3.1 B <2 <2 <2
7.6 3.9 3.5 6.8
17 6.3 6.2 17
TR0795A Page 49 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
24A 24A 24A 24A
April 2020 May/June 2020 May/June 2020 August 2020
STW-LOC-24A-042820-
D STW-LOC24A-060320 STW-LOC24A-060320-D STW-LOC-24A-082620
4/28/2020 6/3/2020 6/3/2020 8/26/2020
TestAmerica TestAmerica TestAmerica TestAmerica
Field Duplicate --Field Duplicate --
10 38 J 20 J 28
6.9 <2 UJ <2 UJ 18 J
8.5 6.4 J 7.4 J 26 J
<2 <2 UJ <2 UJ 4.1
<2 <2 UJ <2 UJ <2
5.1 <2 UJ <2 UJ <2
25 96 J 63 J 53 J
<20 140 J 53 J 18 J
<2 <2 UJ <2 UJ <2
<2 <2 UJ <2 UJ <2
11 J <2 UJ <2 UJ <2
3.4 J <2 UJ <2 UJ 7.9 J
<2 <2 UJ <2 UJ <2
5.1 <2 UJ <2 UJ <2
<2 <2 UJ <2 UJ <2
<2 <2 UJ <2 UJ <2
<2 <2 UJ <2 UJ 35 J
<2 <2 UJ <2 UJ <2
<2 <2 UJ <2 UJ <2
<2 <2 UJ <2 UJ <2
61 280 140 150
75 280 140 190
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 ------
--<2 <2 <2
<2.1 ------
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
3.7 3.2 2.9 4.3
7.3 13 13 6.1
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
5 6.1 6.1 3.5
<2 <2 <2 --
5 3.1 3.3 4.3
8.8 9.6 9.2 7.2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
10 11 11 8.7
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
6.6 6.1 6.8 6.6
16 8.9 J 12 J 13
TR0795A Page 50 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
24A 24B 24B 24B
August 2020 April 2019 June 2019 August 2019
STW-LOC-24A-082620-
D DSTW-LOC24B-042419 STW-LOC24B-062719 STW-LOC24B-082119
8/26/2020 04/24/2019 06/27/2019 8/21/2019
TestAmerica TestAmerica TestAmerica TestAmerica
Field Duplicate ------
30 14 10 8.9
18 11 J <5 <5
14 J 11 J 8.1 6.7
2.2 <2 UJ <2 <2
<2 <2 UJ <2 <2
<2 <2 UJ <2 <2
21 J 19 J 17 16
<10 <20 UJ <20 <20
<2 <2 UJ 77 <2
<2 <2 UJ 3.3 <2
3 5.1 J <2 5.3 J
4 J 4.3 J 11 J 2.4 J
<2 <2 UJ <2 <2
<2 <2 UJ <2 4.3
<2 <2 UJ <2 <2
<2 <2 UJ <2 <2
<2 3.8 J <2 2.2 J
<2 <2 UJ <2 <2
<2 <2 UJ <2 <2
<2 <2 UJ <2 <2
85 55 120 36
92 68 130 46
<2 <2.0 <2 <2
<2 ----<2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <60 <2 <2
<4 <110 <2 <4
<20 <20 <20 <20
<2 ----<2
--<2.1 <2.1 <2.1
<2 ------
--<2.1 <2.1 <2.1
<20 <20 <20 <20
<2 <37 2.9 <2
<2 <35 <2 <2
<20 <20 <20 <20
4.5 2.2 3.5 4.3
6.2 5.5 9.6 9.5
<2 <2.0 <2 <2
<2 <2.0 <2 <2
<2 <2.0 <2 <2
<2 <2.0 <2 <2
<2 <2.0 <2 <2
3.3 6 13 21
--<2.0 <2 <2
4.3 3.3 5 5.8
7.7 8 19 25
<2 <2.0 <2 <2
<2 <2.0 <2 <2
<2 <2.0 <2 <2
<2 <2.0 <2 <2
<2 <2.0 <2 <2
8.2 6.2 17 25
<2 <2.0 <2 <2
<2 <2.0 <2 <2
<2 <2.0 <2 <2
6.3 7.7 8.3 9.5
11 12 14 16
TR0795A Page 51 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
24B 24B 24B 24B
October 2019 December 2019 December 2019 January 2020
STW-LOC24B-100919 STW-LOC-24B-122019 STW-LOC-24B-122019-D STW-LOC24B-012920
10/9/2019 12/20/2019 12/20/2019 1/29/2020
TestAmerica TestAmerica TestAmerica TestAmerica
----Field Duplicate --
8.5 11 B 8.7 B 12
<5 UJ 12 13 8.2 J
7.1 6.5 5.1 6.2
2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
18 27 B 29 B 24
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
6.9 J <2 3.7 J <2
4.4 J 5.2 J 6.2 J 3.7 J
<2 <2 <2 <2
7 <2 <2 <2
9.6 <2 <2 <2
<2 <2 <2 <2
<2 <2 2.6 J <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
52 57 56 50
64 62 68 54
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
6.2 2.8 2.7 <2
18 3.9 J 3.9 3.9
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
34 6.8 J 6.8 2.8
<2 <2 <2 <2
8.5 3.1 3.2 2.1
49 13 J 12 4.1
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
46 8.3 J 9.9 4.3
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
11 4.6 J 4.6 3
15 7.5 7.9 5.3
TR0795A Page 52 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
24B 24B 24B 24C
April 2020 May/June 2020 August 2020 April 2019
STW-LOC-24B-042820 STW-LOC24B-060320 STW-LOC-24B-082620 DSTW-LOC24C-042419
4/28/2020 6/3/2020 8/26/2020 04/24/2019
TestAmerica TestAmerica TestAmerica --
--------
16 4.7 15 19
15 3.2 <2 11 J
12 5.8 13 12 J
2.4 <2 2.1 <2 UJ
<2 <2 <2 <2 UJ
5.6 <2 <2 <2 UJ
26 33 22 28 J
<20 <2 <10 <20 UJ
<2 <2 <2 14 J
<2 <2 <2 2.1 J
<2 <2 15 39 J
5.5 J <2 5.5 51 J
<2 <2 <2 <2 UJ
4.5 <2 <2 4 J
<2 <2 <2 6.8 J
<2 <2 <2 3.7 J
2.2 J <2 <2 36 J
<2 <2 <2 <2 UJ
<2 <2 <2 <2 UJ
<2 <2 <2 <2 UJ
82 47 52 100
89 47 73 230
<2 <2 <2 <2.0
<2 <2 <2 --
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <60
<4 <4 <4 <110
<20 <20 <20 <20
<2 <2 <2 --
<2.1 ----<2.1
--<2 <2 --
<2.1 ----<2.1
<20 <20 <20 <20
<2 <2 <2 <37
<2 <2 <2 <35
<20 <20 <20 <20
3.5 2.8 4.1 2
5.4 6.3 J 5.3 4.7
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
4.4 3.5 3.3 5.9
<2 <2 <2 <2
4.4 3.1 4.1 3.4
9.1 7.7 6.7 7
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
10 6.4 8.0 6.4
<2 <2 <2 <2.0
<2 <2 <2 <2.0
<2 <2 <2 <2.0
5.7 5.5 6.0 7.3
12 9 12 15
TR0795A Page 53 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
24C 24C 24C 24C
June 2019 August 2019 December 2019 January 2020
STW-LOC24C-062719 STW-LOC24C-082119 STW-LOC-24C-122019 STW-LOC24C-012920
06/27/2019 8/21/2019 12/20/2019 1/29/2020
TestAmerica TestAmerica TestAmerica TestAmerica
--------
16 13 270 11
<5 <5 <21 10 J
8.6 7.6 46 7.2
<2 <2 20 <2
<2 <2 13 <2
<2 <2 12 <2
14 23 61 B 26
<20 <20 31 <20
3.5 21 490 4.4
<2 3.3 130 <2
13 J 18 J 470 J 8 J
5.3 J 53 J 1,300 J 44 J
<2 <2 11 <2
2 6.7 260 4.7
<2 2.1 930 5.6
<2 <2 290 2.2
3.9 J 5.4 J 170 J <2
<2 <2 <4.6 <2
<2 <2 <6 <2
<2 <2 <4.1 <2
44 77 2,600 71
66 150 4,500 120
<2 <2 <2 <2
--<2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<2 <4 <4 <4
<20 <20 <20 <20
--<2 <2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
2.3 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
3.8 4.5 2.9 <2
8 8.4 5.3 3.3
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
13 22 7.1 2.8
<2 <2 <2 <2
5.1 6.1 3.2 2
21 27 13 3.9
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
17 26 11 4
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
7.9 9.8 5.3 2.8
15 13 8.1 5.5
TR0795A Page 54 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
24C 24C 24C TBLK
April 2020 May/June 2020 August 2020 April 2019
STW-LOC-24C-042820 STW-LOC24C-060320 STW-LOC-24C-082620 DSTW-TB-042519
4/28/2020 6/3/2020 8/26/2020 04/25/2019
TestAmerica TestAmerica TestAmerica TestAmerica
------Trip Blank
16 5.6 14 <4.0
15 3 7.4 <5 UJ
13 6.1 13 <2 UJ
2.2 <2 2.1 <2 UJ
<2 <2 <2 <2 UJ
5 <2 <2 <2 UJ
26 31 47 <10 UJ
<20 <2 <10 <20 UJ
16 8.9 2.7 <2 UJ
<2 <2 <2 <2 UJ
15 J 30 J 20 <2 UJ
25 J 22 J 14 <2 UJ
<2 <2 <2 <2 UJ
5.2 3.4 7.5 <2 UJ
5.9 2.6 <2 <2 UJ
2.4 <2 <2 <2 UJ
<2 3.4 J 11 <2 UJ
<2 <2 <2 <2 UJ
<2 <2 <2 <2 UJ
<2 <2 <2 <2 UJ
110 61 94 ND
150 120 140 ND
<2 <2 <2 <2
<2 <2 <2 --
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <60
<4 <4 <4 <110
<20 <20 <20 <20
<2 <2 <2 --
<2.1 ----<2.1
--<2 <2 --
<2.1 ----<2.1
<20 <20 <20 <20
<2 <2 <2 <37
<2 <2 <2 <35
<20 <20 <20 <20
3.5 2.9 4.0 <2
5.4 4.9 4.8 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
4.5 3.9 3.3 <2
<2 <2 --<2
4.3 2.8 4.0 <2
8.7 8 6.5 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
10 5.4 7.2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
6.5 5.7 5.5 <2
11 10 9.2 <2
TR0795A Page 55 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
TBLK TBLK TBLK TBLK
June 2019 August 2019 October 2019 December 2019
STW-TBLK-1 STW-TBLK-082219 STW-TBLK-100919 STW-TB-122619
06/28/2019 8/22/2019 10/9/2019 12/26/2019
TestAmerica TestAmerica TestAmerica TestAmerica
Trip Blank Trip Blank Trip Blank Trip Blank
<4 <2 <4 6.7
<5 <5 <5 <5
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<10 <10 <10 11
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
ND ND ND 18
ND ND ND 18
<2 <2 <2 <2
--<2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<2 <4 <4 <4
<20 <20 <20 <20
--<2 <2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 2.9
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 27
<2 <2 <2 5
<2 <2 <2 <2
<2 <2 <2 <2
TR0795A Page 56 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
TBLK TBLK TBLK TBLK
January 2020 April 2020 May/June 2020 August 2020
STW-LOCTB-012920 STW-LOC-TB-042820 STW-TB-052120 STW-TBLK-082620
1/29/2020 4/28/2020 5/20/2020 8/26/2020
TestAmerica TestAmerica TestAmerica TestAmerica
Trip Blank Trip Blank Trip Blank Trip Blank
<4 <4 <2 <4
<5 <5 <5 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<10 <10 <10 <20
<20 <20 <20 <10
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
ND ND ND ND
ND ND ND ND
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 <2.1 ----
----<2 <2
<2.1 <2.1 ----
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 --
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
TR0795A Page 57 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
EQBLK EQBLK EQBLK EQBLK
April 2019 April 2019 April 2019 June 2019
DSTW-EB-01-042419 DSTW-EB-02-042419 DSTW-EB-03-042419 STW-EQBLK-1
04/24/2019 04/24/2019 04/24/2019 06/28/2019
TestAmerica TestAmerica TestAmerica TestAmerica
Equipment Blank Equipment Blank Equipment Blank Equipment Blank
<4.0 <4.0 <4.0 <4
<5 UJ <5 UJ <5 UJ <5
<2 UJ <2 UJ <2 UJ <2
<2 UJ <2 UJ <2 UJ <2
<2 UJ <2 UJ <2 UJ <2
<2 UJ <2 UJ <2 UJ <2
<10 UJ <10 UJ <10 UJ <10
<20 UJ <20 UJ <20 UJ <20
<2 UJ <2 UJ <2 UJ <2
<2 UJ <2 UJ <2 UJ <2
<2 UJ <2 UJ <2 UJ <2
<2 UJ <2 UJ <2 UJ <2
<2 UJ <2 UJ <2 UJ <2
<2 UJ <2 UJ <2 UJ <2
<2 UJ <2 UJ <2 UJ <2
<2 UJ <2 UJ <2 UJ <2
<2 UJ <2 UJ <2 UJ <2
<2 UJ <2 UJ <2 UJ <2
<2 UJ <2 UJ <2 UJ <2
<2 UJ <2 UJ <2 UJ <2
ND ND ND ND
ND ND ND ND
<2.0 <2.0 <2.0 <2
--------
<20 <20 <20 <20
<20 <20 <20 <20
820 J 850 J 780 J <2
<110 <110 <110 <2
<20 <20 <20 <20
--------
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<37 UJ <37 UJ <37 <2
<35 <35 <35 <2
<20 <20 <20 <20
<2.0 <2.0 <2.0 <2
<2.0 <2.0 <2.0 <2
<2.0 <2.0 <2.0 <2
<2.0 <2.0 <2.0 <2
<2.0 <2.0 <2.0 <2
<2.0 <2.0 <2.0 <2
<2.0 <2.0 <2.0 <2
<2.0 <2.0 <2.0 <2
<2.0 <2.0 <2.0 <2
<2.0 <2.0 <2.0 <2
<2.0 <2.0 <2.0 <2
<2.0 <2.0 <2.0 <2
<2.0 <2.0 <2.0 <2
<2.0 <2.0 <2.0 <2
<2.0 <2.0 <2.0 <2
<2.0 <2.0 <2.0 <2
<2.0 <2.0 <2.0 <2
<2.0 <2.0 <2.0 <2
<2.0 <2.0 <2.0 <2
<2.0 <2.0 <2.0 <2
<2.0 <2.0 <2.0 <2
<2.0 <2.0 <2.0 <2
TR0795A Page 58 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
EQBLK EQBLK EQBLK EQBLK
June 2019 August 2019 August 2019 August 2019
STW-EQBLK-2 STW-EB-01-082119 STW-EB-02-082119 STW-EB-03-082119
06/27/2019 8/21/2019 8/21/2019 8/21/2019
TestAmerica TestAmerica TestAmerica TestAmerica
Equipment Blank Equipment Blank Equipment Blank Equipment Blank
<4 <2 <2 <2
<5 <5 <5 <5
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<10 <10 <10 <10
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
ND ND ND ND
ND ND ND ND
<2 <2 <2 <2
--<2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<2 <4 <4 <4
<20 <20 <20 <20
--<2 <2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 2 <2
<2 <2 <2 <2
<2 <2 <2 <2
TR0795A Page 59 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
EQBLK EQBLK EQBLK EQBLK
October 2019 October 2019 October 2019 December 2019
STW-EB-01-100919 STW-EB-02-100919 STW-EB-03-100919 STW-EQBLK-DR-
122019
10/9/2019 10/9/2019 10/9/2019 12/20/2019
TestAmerica TestAmerica TestAmerica TestAmerica
Equipment Blank Equipment Blank Equipment Blank Equipment Blank
<4 <4 <4 <4
<5 <5 <5 <5
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<10 <10 <10 10
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
ND ND ND 10
ND ND ND 10
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
TR0795A Page 60 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
EQBLK EQBLK EQBLK EQBLK
December 2019 January 2020 January 2020 April 2020
STW-EQBLK-IO-122019 STW-LOCEB1-012920 STW-LOCEB2-012920 STW-LOC-EB1-042820
12/20/2019 1/29/2020 1/29/2020 4/28/2020
TestAmerica TestAmerica TestAmerica TestAmerica
Equipment Blank Equipment Blank Equipment Blank Equipment Blank
<4 <4 <4 <4
<5 <5 UJ <5 UJ <5
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
10 <10 <10 <10
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
10 ND ND ND
10 ND ND ND
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
TR0795A Page 61 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
EQBLK EQBLK EB EB
April 2020 May/June 2020 August 2020 August 2020
STW-LOC-EB2-042820 STW-EB-052120 STW-EQBLK-DR-
082620 STW-EQBLK-IS-082620
4/28/2020 5/20/2020 8/26/2020 8/26/2020
TestAmerica TestAmerica TestAmerica TestAmerica
Equipment Blank Equipment Blank Equipment Blank Equipment Blank
<4 <2 <4 <4
<5 <5 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<10 <10 <20 <20
<20 <20 <10 <10
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
ND ND ND ND
ND ND ND ND
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 ------
--<2 <2 <2
<2.1 ------
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 ----
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
TR0795A Page 62 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
EB FBLK FBLK FBLK
August 2020 April 2019 June 2019 August 2019
STW-EQBLK-PP-082620 DSTW-TB-042519 STW-LOC-FBLK-1 STW-FB-082119
8/26/2020 04/25/2019 06/27/2019 8/21/2019
TestAmerica TestAmerica TestAmerica TestAmerica
Equipment Blank Field Blank Field Blank Field Blank
<4 <4.0 <4 <2
<2 <5 UJ <5 <5
<2 <2 UJ <2 <2
<2 <2 UJ <2 <2
<2 <2 UJ <2 <2
<2 <2 UJ <2 <2
<20 <10 UJ <10 <10
<10 <20 UJ <20 <20
<2 <2 UJ <2 <2
<2 <2 UJ <2 <2
<2 <2 UJ <2 <2
<2 <2 UJ <2 <2
<2 <2 UJ <2 <2
<2 <2 UJ <2 <2
<2 <2 UJ <2 <2
<2 <2 UJ <2 <2
<2 <2 UJ <2 <2
<2 <2 UJ <2 <2
<2 <2 UJ <2 <2
<2 <2 UJ <2 <2
ND ND ND ND
ND ND ND ND
<2 <2 <2 <2
<2 ----<2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <60 <2 <2
<4 <110 <2 <4
<20 <20 <20 <20
<2 ----<2
--<2.1 <2.1 <2.1
<2 ------
--<2.1 <2.1 <2.1
<20 <20 <20 <20
<2 <37 <2 <2
<2 <35 <2 <2
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
--<2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
TR0795A Page 63 of 65 December 2020
DocuSign Envelope ID: 3296F1CC-8476-4A30-97CB-604DAA2E6672
Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
FBLK FBLK FBLK FBLK
October 2019 December 2019 Jannuary 2020 April 2020
STW-FB-100919 STW-FBLK-122019 STW-LOCFB-012920 STW-LOC-FB-042820
10/9/2019 12/20/2019 1/29/2020 4/28/2020
TestAmerica TestAmerica TestAmerica TestAmerica
Field Blank Field Blank Field Blank Field Blank
<4 <4 UJ <4 <4
<5 <5 <5 UJ <5
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<10 10 <10 <10
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
ND 10 ND ND
ND 10 ND ND
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<20 <20 <20 <20
<2 <2 <2 <2
<4 <4 <4 <4
<20 <20 <20 <20
<2 <2 <2 <2
<2.1 <2.1 <2.1 <2.1
--------
<2.1 <2.1 <2.1 <2.1
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 <2 <2
<20 <20 <20 <20
<2 <2 <2 <2
<2 <2 UJ <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 UJ <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 UJ <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 UJ <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 <2 <2
<2 <2 UJ <2 <2
<2 <2 <2 <2
TR0795A Page 64 of 65 December 2020
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Table C1
ANALYTICAL RESULTS - ALL SAMPLING EVENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
Sampling Event
Field Sample ID
Date Sampled
Analytical Laboratory
QA/QCTable 3+ Lab SOP (ng/L)
HFPO-DA (EPA Method 537 Mod)
PFMOAA
PFO2HxA
PFO3OA
PFO4DA
PFO5DA
PMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ Compounds (17 compounds)*
Total Table 3+ Compounds (20 compounds)*
Other PFAS (ng/L)
10:2 Fluorotelomer sulfonate
F-53B Minor (11Cl-PF3OUdS)
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
2-(N-ethyl perfluoro-1-octanesulfonamido)-ethanol
2-(N-methyl perfluoro-1-octanesulfonamido)-ethanol
6:2 Fluorotelomer sulfonate
F-53B Major (9Cl-PF3ONS)
ADONA
DONA
NaDONA
N-ethyl perfluorooctane sulfonamidoacetic acid
N-ethylperfluoro-1-octanesulfonamide
N-methyl perfluoro-1-octanesulfonamide
N-methyl perfluorooctane sulfonamidoacetic acid
Perfluorobutane Sulfonic Acid
Perfluorobutanoic Acid
Perfluorodecane Sulfonic Acid
Perfluorodecanoic Acid
Perfluorododecane sulfonic acid (PFDoS)
Perfluorododecanoic Acid
Perfluoroheptane sulfonic acid (PFHpS)
Perfluoroheptanoic Acid
Perfluorohexadecanoic acid (PFHxDA)
Perfluorohexane Sulfonic Acid
Perfluorohexanoic Acid
Perfluorononanesulfonic acid
Perfluorononanoic Acid
Perfluorooctadecanoic acid
Perfluorooctane Sulfonamide
Perfluoropentane sulfonic acid (PFPeS)
Perfluoropentanoic Acid
Perfluorotetradecanoic Acid
Perfluorotridecanoic Acid
Perfluoroundecanoic Acid
PFOA
PFOS
FBLK FBLK
May/June 2020 August 2020
STW-FB-052120 STW-FBLK-082620
5/20/2020 8/26/2020
TestAmerica TestAmerica
Field Blank Field Blank
<2 <4 Notes:
<5 <2
<2 <2
<2 <2
<2 <2
<2 <2
<10 <20
<20 <10
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2 Bold - Analyte detected above associated reporting limit
<2 <2 EPA - Environmental Protection Agency
<2 <2 B - Not detected substantially above the level reported in the laboratory or field blanks.
<2 <2 J - Analyte detected. Reported value may not be accurate or precise.
<2 <2 ND - No Table 3+ compounds were detected above their associated reporting limits.
<2 <2 ng/L - nanograms per liter
<2 <2 QA/QC - Quality assurance/ quality control
<2 <2 R - Reject. The presence or absence of the analyte cannot be verified.
ND ND SOP - standard operating procedure
ND ND UJ – Analyte not detected. Reporting limit may not be accurate or precise.
-- - No data reported
<2 <2 < - Analyte not detected above associated reporting limit.
<2 <2
<20 <20
<20 <20
<2 <2
<4 <4
<20 <20
<2 <2
----
<2 <2
----
<20 <20
<2 <2
<2 <2
<20 <20
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 --
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
<2 <2
* - 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.
Samples collected in May 2020 and June 2020 are considered one sampling event, the May/June 2020
event. Locations containing stormwater were collected in May 2020 during a storm event. Locations that
had no influence from stormwater were collected in June 2020.
Locations sampled in May 2020 were collected on May 20, 2020, and sample bottles were retrieved on
May 21, 2020. Locations sampled in June 2020 were collected on June 3, 2020, and some sample bottles
were retrieved on June 5, 2020.
Total Table 3+ (17 compounds) excludes Hydrolyzed PSDA, R-PSDA and R-EVE because these 3
compounds are not considered accurate due to significant matrix interference issues. All detected
concentrations for these 3 compounds have been retrospectively J-qualified.
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