NCD047368642_Chemours_LCF-FCA Well Sampling Monthly Report and CL_February 2024_03152024

CChemours"
March 15, 2024
Sushma Masemore, P.E.
Assistant Secretary
N.C. Department of Environmental Quality
1601 Mail Service Center
Raleigh, NC 27699-1601
[e-mail]
The Chemours Company
Fayetteville Works
22828 NC Highway 87 W
Fayetteville, NC 28306
Re: Four Counties Private Well Sampling Monthly Report — February 2024
Dear Ms. Masemore,
Please find enclosed the Four Counties Private Well Sampling Monthly Report for
February 2024. This report is being submitted by Chemours in response to a request from the
North Carolina Department of Environmental Quality (NCDEQ) to provide monthly reports on
the activities conducted under the Interim Four Counties Sampling and Drinking Water Plan
(Version 3, dated June 1, 2022)1. The report was prepared by Chemours's consultant, Geosyntec
Consultants of NC, P.C.
If you have any questions, please contact me at [e-mail].
Sincerely,
Seth T. Bailey
Plant Manager
Chemours — Fayetteville Works
Enclosure
Four Counties Private Well Sampling Monthly Report — February 2024
1 Geosyntec, 2022. Interim Four Counties Sampling and Drinking Water Plan (New Hanover, Brunswick, Columbus
and Pender Counties), version 3, Chemours Fayetteville Works. June 1, 2022.

Geosyntec"'
consultants
Geosyntec Consultants of NC, P.C.
NC License No.: C-3500 and C-295
Four Counties Private Well Sampling
Monthly Report — February 2024
Chemours Fayetteville Works
Prepared for
The Chemours Company FC, LLC
22828 NC Highway 87
Fayetteville, NC 28306
Prepared by
Geosyntec Consultants of NC PC
2501 Blue Ridge Road, Suite 430
Raleigh, NC 2 760 7
Project Number TR1043
March 2024

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TABLE OF CONTENTS
1 Introduction and Objectives..................................................................................................1
2 Representative Sampling Activities in February 2024..........................................................2
2.1 Responses to Community Outreach.............................................................................2
2.2 Sampling Eligibility Screening....................................................................................3
3 Private Well Testing..............................................................................................................
6
3.1 Sample Collection........................................................................................................6
3.2 Attachment C Analytical Results.................................................................................6
3.3 NCDEQ Private Well Testing......................................................................................7
4 Replacement of Private Drinking Supplies...........................................................................9
4.1 Interim Replacement Drinking Supplies......................................................................9
4.2 Permanent Replacement Drinking Supplies..............................................................10
5 Data Gathering.....................................................................................................................12
6 Interim Plan Updates/Modifications....................................................................................13
7 Summary..............................................................................................................................14
8 References...........................................................................................................................16
LIST OF TABLES
Table 1
Community Outreach Metrics
Table 2
Summary of Cumulative Sampling Eligibility Screening
Table 3
Monthly and Cumulative Summary of Private Well Testing
Table 4
Summary of Attachment C PFAS Analytical Results
Table 5
Qualifying Locations for Interim Replacement Drinking Water Supply
Table 6
Replacement Drinking Water Supply
LIST OF FIGURES
Figure 1
Site Location
Figure 2A
Sampling Eligibility Screening
—February 2024 - Brunswick County
Figure 2B
Sampling Eligibility Screening
— February 2024 — Columbus County
Figure 2C
Sampling Eligibility Screening
— February 2024 — New Hanover County
Figure 2D
Sampling Eligibility Screening
— February 2024 — Pender County
TR1043 — Monthly Report — February 2024 i March 2024

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Figure 3 Sampling Eligibility Details — February 2024
Figure 4 Summary of Private Well Sampling — February 2024 and Cumulative
Figure 5 Attachment C PFAS Analytical Results — February 2024 and Cumulative
LIST OF APPENDICES
Appendix A Supplemental Tables and Figures
TR1043 — Monthly Report — February 2024 11 March 2024

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ACRONYMS AND ABBREVIATIONS
CFPUA Cape Fear Public Utility Authority
CO Consent Order
FEMA
Federal Emergency Management Agency
GAC
Granular Activated Carbon
HFPO-DA
Hexafluoropropylene Oxide Dimer Acid
LCFWASA
Lower Cape Fear Water and Sewer Authority
NCDEQ
North Carolina Department of Environmental Quality
ng/L
nanograms per liter
NHD
National Hydrography Database
NOAA
National Oceanic and Atmospheric Administration
PFAS
Per- and Polyfluoroalkyl Substances
PFMOAA
Perfluoro-2-Methoxyacetic Acid
PF02HxA
Perfluoro-3,5-Dioxahexanoic Acid
RO
Reverse Osmosis
USGS
United States Geological Survey
USPS
United States Postal Service
TR1043 — Monthly Report — February 2024 ]]1 March 2024

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1 INTRODUCTION AND OBJECTIVES
This Four Counties Private Well Sampling Monthly Report has been prepared by Geosyntec
Consultants of NC, P.C. (Geosyntec) for The Chemours Company FC, LLC (Chemours). This
document presents a summary of the activities conducted as part of the implementation of the
Interim Four Counties Sampling and Drinking Water Plan (Interim Plan; Version 3, dated
June 1, 2022; Geosyntec, 2022a) in New Hanover, Brunswick, Columbus, and Pender Counties
(the counties) of North Carolina (Figure 1).
In a response letter dated May 2, 2022, the North Carolina Department of Environmental Quality
(NCDEQ) requested Chemours provide monthly reports on the activities conducted under the
Interim Plan (NCDEQ, 2022). This is the twenty-second monthly report prepared since NCDEQ's
request. There are two primary objectives for this report:
1. Provide the status and results of Representative Sampling and Data Gathering
activities, as defined in the Interim Plan (Version 3, dated June 1, 2022), completed in
the four counties in the month of February 2024 and cumulatively since implementation
of the Interim Plan; and
2. Communicate to NCDEQ any updates or modifications to the Representative Sampling
Program.
The remainder of this monthly report is organized as follows:
• Section 2 provides updates on the properties contacted as part of community outreach,
sampling requests received, and sampling eligibility screening results;
• Section 3 presents results of the private well testing, including samples collected and
Attachment C per- and polyfluoroalkyl substances (PFAS) analytical results received in
February 2024. Section 3 also provides a summary of properties with private well samples
in exceedance of the Consent Order (CO) criteria and eligible for interim and permanent
replacement drinking water;
• Section 4 provides the status of data gathering efforts, including public record requests to
the counties and other entities and the collection of other supporting information from
online and third -party sources;
• Section 5 provides updates on the replacement drinking water supplies for qualifying
properties, including implementation of interim measures;
• Section 6 provides updates and/or modifications to the Interim Plan; and
• Section 7 summarizes report findings.
TR1043 — Monthly Report — February 2024 1 March 2024

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2 REPRESENTATIVE SAMPLING ACTIVITIES IN FEBRUARY 2024
Per the Interim Plan (Version 3; Geosyntec, 2022a), Representative Sampling activities included
testing eligible private wells identified through:
1. Community outreach via letter across the four counties;
2. Proximity to existing and future CO exceedances (i.e., within a quarter mile of a private
well where Attachment C PFAS concentrations exceed CO criteria);
3. Requests received via the call line or web form; and
4. Resampling of the 11 private wells sampled by NCDEQ.
Private wells that are the primary source of drinking water on a property are eligible for sampling
if they meet one of the four expanded sampling eligibility criteria established in November 2023
and agreed upon by Chemours and NCDEQ. The expanded sampling eligibility criteria were
incorporated into sampling eligibility determinations beginning in December 2023. Further details
on the expanded sampling eligibility criteria and implementation are provided in the November
2023 monthly report (Geosyntec, 2023a).
Updates on the community outreach activities and sampling eligibility are provided in the
subsections below.
2.1 Responses to Community Outreach
Community outreach was initiated in June 2022, which consisted of mailing well information and
sampling offer letters to properties across the four counties. Since then, additional properties
potentially eligible for sampling continue to be identified based on proximity to known CO
exceedances of Attachment C PFAS concentrations (as indicated by analytical results received to
date), proximity to water and/or sewer lines (as indicated by newly available information),
proximity to the expanded Cape Fear River buffer, and proximity to locations of biosolids
applications (as described in the November 2023 monthly report, Geosyntec, 2023a). Between
July 2022 and February 2024, additional well information and sampling offer letters were mailed
to 16,373 properties based on additionally identified addresses, additional public water
information, proximity to known CO exceedances of Attachment C PFAS concentrations, and the
expanded sampling eligibility criteria established in November 2023 and agreed upon by
Chemours and NCDEQ (Geosyntec, 2023a). Additional properties may continue to be identified
and mailed in upcoming months as more data become available.
As of February 29, 2024, 83,086 properties across the four counties were contacted via community
outreach and responses have been received from 32,281 properties (Table 1), a response rate of
39%. This total number of responses includes shared well users and any additional units on a
property that were identified after the letters were sent.
Per the Interim Plan (Version 3; Geosyntec, 2022a), owners/residents who have not responded to
the initial mailing effort from June 2022 were to be mailed a follow-up well information and
TR1043 — Monthly Report — February 2024 2 March 2024

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sampling offer letter after 90 days. To date, six follow-up letters have been mailed to unresponsive
owners/residents across the four counties in September 2022 (Geosyntec, 2022b), December 2022
(Geosyntec, 2023b), May 2023 (Geosyntec, 2023c), September 2023 (Geosyntec, 2023d),
November 2023, and February 2024 (Geosyntec, 2023e)1. The May, September, and November
2023 mailers were sent via certified mail per Chemours' March 16, 2023, letter regarding the
"Four Counties Assessment Workplan — Response to Comments".
Table 1. Community Outreach Metrics as of February 29, 2024
Metric
Total
Number of Properties Contacted via Community Outreach
83,086
Number of Properties that Responded to Community Outreach
32,281
Community Outreach Response Rate
39%
Notes:
Metrics include shared well users.
2.2 Sampling Eligibility Screening
A summary of the sampling eligibility screening completed as of February 29, 2024 is provided in
Table 2 below. Details related to the sampling eligibility screening are being provided on a weekly
basis to NCDEQ via an email transmittal.
' Follow-up letters were not sent to residences where previous letters sent via certified mail were returned as
undeliverable. For those cases, alternative address investigations are being conducted, and follow-up letters will
be sent to any new or updated addresses identified.
TR1043 — Monthly Report — February 2024 3 March 2024

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Table 2. Summary of Cumulative Sampling Eligibility Screening as of February 29, 2024
Totals By Screening Category
Totals By County
Call In and
Processed and
NCDEQ
New
Metric
Total
Online Web
Screened Well
Resampling
Hanover
Brunswick
Pender
Columbus
Form Requests
Information Letters
Location
Total Screened
31,852
2,098
29,744
10
10,908
12,702
6,333
1909
'
for Eligibility'
Total Eligible
10,406
1,394
9,002
10
5,037
1,261
3,663
445
for Sampling
Total Not
Eligible for
21,446
704
20,742
0
5,871
11,441
2,670
1,464
Sampling
Total
Scheduled for
7,967
1,205
6,754
8
3,877
849
3,027
214
Sampling
Notes:
1 —429 of the 32,281 responses to the community outreach are pending screening due to incomplete information, therefore only 31,852 properties have been
screened.
TR1043 — Monthly Report — February 2024 4 March 2024

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As of February 29, 2024, 31,852 properties have been screened for eligibility, and 10,406 of these
are eligible for sampling. Of these 10,406 eligible for sampling, 7,967 have been scheduled for
sampling, and 391 have declined sampling. The counts of the metrics presented in Table 2 include
properties that are connected to shared wells or community wells that were identified through the
community outreach (Table 1). More specifically, the following is a breakdown based on the three
Screening Categories:
• Call In Requests — 2,098 properties have been screened for eligibility, and of these, 1,394
are eligible for sampling. Of these 1,394 eligible for sampling, 1,205 have been scheduled
for sampling.
• Processed and Screened Well Information Letters — 29,744 properties have been screened
for eligibility, and of these, 9,002 are eligible for sampling. Of these 9,002 eligible for
sampling, 6,754 have been scheduled for sampling.
• NCDEQ Resampling Locations — 11 private wells (three private drinking water wells and
seven private wells used for irrigation purposes) at 10 locations were attempted to be
scheduled for resampling. Of these 10 locations, eight have been scheduled for sampling
(three private drinking water wells and five private wells used for irrigation purposes).
Figures 2A through 2D (February 2024) and Figures A1.1 through A1.4 (through February 29,
2024) show the results of screening by county. In general, the majority of properties screened as
of February 29, 2024 have been in Brunswick (12,702) and New Hanover (10,908), while fewer
properties have been in Pender (6,333) and Columbus (1,909).
Figure 3 (February 2024) and Figure A2 (through February 29, 2024) present the locations of
properties not eligible for sampling and rationale for not offering sampling to these
residents/owners. Among the 21,446 properties ineligible for sampling, 20,675 (approximately
96%) were ineligible because the owner/resident indicated that they were connected to a public
drinking water supply (293 from call in requests and 20,382 from letter responses). The remaining
771 properties (approximately 4%) were ineligible for other reasons including:
• The property is vacant or an empty lot;
• There is no drinking water source on the property, or the resident uses a commercial
filtration system; or
• The private drinking water well did not meet the sampling eligibility criteria.
TR1043 — Monthly Report — February 2024 5 March 2024

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3 PRIVATE WELL TESTING
Private well sampling was completed by Chemours' contractor Parsons of NC (Parsons) using
procedures outlined in the Interim Plan (Version 3; Geosyntec, 2022a). Samples were submitted
to a third -party laboratory approved by NCDEQ, for analysis of PFAS compounds and other
parameters.
3.1 Sample Collection
Table 3 summarizes the samples collected from private wells on 7,062 properties through February
29, 2024, which includes 261 properties that were sampled in February 2024. Figure 4 shows the
location of the private well samples collected in February 2024 and cumulatively.
Table 3. Monthly and Cumulative Summary of Private Well Testing
February 2024
Cumulative (through February 29,
2024
Samples
Analytical
Samples
Analytical
County
Collected
Results Received
Collected
Results
Received
Brunswick
62
61
824
775
Columbus
32
26
200
175
New Hanover
86
47
3,506
3,440
Pender
81
63
2,532
2,452
Total
261
197
7,062
6,842
Notes:
The numbers in this table reflect the number of unique properties sampled. Properties with more than one private well
where multiple samples were collected are counted here as one sample and one set of analytical results. In these cases,
the well with the highest relevant PFAS concentrations is used to assess eligibility for replacement drinking supplies
(see Section 4 for further details).
3.2 Attachment C Analytical Results
The list of Attachment C PFAS compounds is provided in Table A.1 and the Attachment C
analytical results received in February 2024 in the four counties are presented in Table A.2. The
list of other PFAS compounds and associated analytical results are provided in Tables A.1 and
A.3, respectively. Figure 5 shows the Attachment C PFAS concentrations in the private well
samples, which are presented based on the criteria outlined in Paragraphs 19 and 20 of the CO.
As of February 29, 2024, analytical results have been received for 6,842 properties, where
197 sample results were received in February 2024 (Table 3). Among the properties with analytical
results, 3,440 were in New Hanover, 2,452 in Pender, 775 in Brunswick, and 175 in Columbus.
Among the eight NCDEQ resampling locations in New Hanover, five of the private wells sampled
were used for irrigation purposes and/or the property is connected to public water.
A summary of the Attachment C PFAS compounds is provided in Table 4 below. Among the
6,842 properties with analytical results, 4,033 properties or 59% showed non -detects for all
Attachment C PFAS. Total Attachment C concentrations ranged from 0.48 nanograms per
TR1043 — Monthly Report — February 2024 6 March 2024

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liter (ng/L) to 8,438 ng/L for samples collected from private drinking water wells (i.e., excluding
NCDEQ resampling locations that do not have a private drinking water well).
In total, there were 1,540 properties with CO exceedances. Properties with CO exceedances had
Total Attachment C concentrations ranging from 10.0 ng/L to 8,438 ng/L.
Table 4. Summary of Attachment C PFAS Analytical Results as of February 29, 2024
Statistic
All
New
Brunswick
Pender
Columbus
Counties
Hanover
Total Results Received
6,842
3,440
775
2,452
175
All Attachment C PFAS Non-
4,033
1,722
438
1,709
164
Detect
Percent of Sample Non -Detect
59%
50%
57%
70%
94%
Range in Detected Total
0.48 — 8,438
1.8 — 8 438
1.1 — 6 065
0.48
2.9 — 152
Attachment C PFAS n /L 1
3,494
Range in Detected HFPO-DA
(ng/L)'
0.3 — 210
0.4 — 210
2.9 — 140
0.3 — 31
NA
Total CO Exceedances
1,540
819
223
491
7
Total Attachment C PFAS >
70 ng/L or Single Attachment
1,338
691
157
483
7
C PFAS > 10 ng/L
HFPO-DA >10 ng/L
202
128
66
8
0
Notes:
NA — not applicable
ng/L — nanograms per liter
1 - does not include NCDEQ resampling locations used for irrigation purposes.
In the properties with Attachment C PFAS detections (2,809 out of 6,842 properties), Perfluoro-
2-methoxyacetic acid (PFMOAA) and Perfluoro-3,5-dioxahexanoic acid (PF02HxA) were the
most frequently detected (2,580 and 1,464 properties, respectively), while Hexafluoropropylene
oxide dimer acid (HFPO-DA) was detected in 444 properties. HFPO-DA concentrations ranged
from 0.3 to 210 ng/L in the 444 properties with detected HFPO-DA, and 242 out of the
444 properties had concentrations less than 10 ng/L.
The list of other PFAS compounds and associated analytical results are provided in Tables A.1
and A.3, respectively.
3.3 NCDEQ Private Well Testing
NCDEQ conducted sampling at 11 properties in the four counties in January 2024 and the
analytical results for those samples were received from NCDEQ in February 2024. Analytical
results for the 11 locations are provided in Table A.4 which includes results provided by NCDEQ
and results from Chemours' Representative Sampling program.
TR1043 — Monthly Report — February 2024 7 March 2024

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The 11 properties sampled by NCDEQ were not previously sampled by Chemours when the
analytical data was received from NCDEQ. Six of the properties are eligible for sampling using
the expanded sampling eligibility criteria, and the remaining five properties do not meet the
expanded sampling eligibility criteria (Geosyntec, 2023a). For ten of the properties, the NCDEQ
collected samples did not exceed the CO criteria and are No Action and therefore confirmation
samples are not required. For one of the properties, the NCDEQ collected sample exceeded the
CO criteria and is eligible for RO. Bottled water was delivered to this property and a confirmation
sample was collected by Chemours in February 2024. The NCDEQ provided results for this
property are included in the counts of results received in this report, and confirmation sample
results for this property will be included in the March 2024 monthly report.
TR1043 — Monthly Report — February 2024 8 March 2024

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4 REPLACEMENT OF PRIVATE DRINKING SUPPLIES
4.1 Interim Replacement Drinking Supplies
Per the Interim Plan (Version 3; Geosyntec, 2022a), private wells with PFAS concentrations
exceeding the CO criteria are eligible for replacement drinking water supplies. The
owners/residents of these eligible private wells are delivered interim bottled water and enrolled in
the bottled water voucher card program within three days of receipt of the laboratory analytical
results. The voucher card will continue to be loaded for the duration of the Interim Plan (Version 3;
Geosyntec, 2022a), until permanent drinking water supply is provided.
PFAS concentrations in 1,540 out of 6,842 properties sampled and analytical results received up
to February 29, 2024 exceeded the CO criteria (Table 5). The locations of these properties in
exceedance of the CO criteria are shown on Figure 5. Including the properties connected to shared
wells or community well systems (indicated in parentheses in Table 5), there were 1,780 properties
that were above the CO criteria. No further action was required for properties that were vacant,
empty lots, connected to public water, or declined bottled water. Interim replacement drinking
water will be provided to these properties in the future, if new information about the property use
and/or primary drinking water source become available.
As of February 29, 2024, 848 properties were actively receiving bottled water as interim
replacement drinking water (Table 5), while the remaining eligible properties have had an RO or
GAC system installed or have been connected to public water (see Section 4.2; Table 6). Bottled
water deliveries to newly eligible properties occurred within three business days of receiving the
analytical results.
Table 5. Qualifying Private Wells for Interim Replacement Drinking Water Supply as of February
29, 2024
Metric
Total
New Hanover
Brunswick
Pender
Columbus
Number of Private Wells Above
1,540 (240)
819 (148)
223 (3)
491 (89)
7 (0)
the CO Criteria
Number of Locations Currently
Being Provided Interim
848
418
114
312
4
Re lacement Drinking Waters
Notes:
Values in parentheses indicate additional number of properties connected to shared wells or community wells that
have a CO exceedance.
1 — Number of Locations Provided Interim Replacement Drinking Water includes shared wells. The remaining
eligible properties have had an RO or GAC system installed or have been connected to public water (see Section
4.2; Table 6).
2 As outlined in Paragraphs 19 and 20 of the Consent Order, an exceedance is observed for a private well, if any
single Attachment C PFAS compound is greater than or equal to 10 ng/L, the sum of the Attachment C PFAS
compounds is greater than or equal to 70 ng/L, or hexafluoropropylene oxide dimer acid [HFPO-DA] is greater
than or equal to 10 ng/L.
TR1043 — Monthly Report — February 2024 9 March 2024

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4.2 Permanent Replacement Drinking Supplies
For properties that have private wells with Attachment C concentrations exceeding the CO criteria,
options for permanent replacement drinking supplies are being evaluated by Chemours, as
described below.
For properties with Attachment C PFAS concentrations greater than or equal to 10 ng/L (for one
PFAS) or 70 ng/L (for combined PFAS), the owner/resident will be offered up to three under -the -
sink water filtration systems (e.g., RO systems). Permanent replacement drinking water supplies
will be determined for eligible properties within the six months set forth in Paragraph 20 of the
CO.
For properties with HFPO-DA concentration greater than or equal to 10 ng/L, the options include
(i) connection to public water, if feasible and available, (ii) under -the -sink RO filtration systems
for every sink on the property, or (iii) whole house GAC water filtration system. Permanent
replacement drinking water supplies will be determined for eligible properties within the nine
months set forth in Paragraph 19 of the CO.
For GAC and RO eligible properties, owners/residents are being provided either an RO or GAC
offer letter with their results and interim replacement drinking water supply (Section 4.1), based
on Attachment C PFAS concentrations detected in the sample collected. The offer letters provide
further instructions for the owner/resident to indicate their preference for a permanent drinking
water supply for their property, which also includes connection to public water. A county -specific
public water evaluation process is being implemented for those that are GAC eligible based on the
available water main data and privacy agreements. If after 90 days, owners/residents have not
responded to the RO or GAC offer letter, a total of four follow-up offer letters will be mailed on a
quarterly basis. Updates on owner/resident responsiveness will be reported and communicated to
DEQ in future reports.
As of February 29, 2024, RO or GAC offer letters have been mailed to a total of 1,705 properties
across the four counties (Table 6)3. Among the 1,705 properties, 1,333 have responded to the RO
or GAC offer letters. RO systems have been installed at 760 properties, GAC systems have been
installed at 123 properties, and both RO and GAC systems have been installed at 4 properties. For
public water connections, 199 agreements have been signed and 60 public water connections have
been completed to date.
3 A total of 1,705 out of the 1,780 eligible properties have been sent an RO/GAC offer letter. In general, this
difference is due to community wells where results are being managed by the well owner.
TR1043 — Monthly Report — February 2024 10 March 2024

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Table 6. Replacement Drinking Water Supply as of February 29, 2024
Totals By County
New
Metric
Total
Hanover
Brunswick
Pender
Columbus
RO
Total Number of Properties Sent an
1,463
796
159
501
7
Offer Letter
Total Number of Responses to RO
1,118
595
124
397
2
Offers
Total Number of Properties with
760
460
81
217
2
RO Systems Installed
Total Number of Properties
56
5
6
45
0
Connected to Public Water
GAC
Total Number of Properties Sent an
Offer Letter
242
166
67
9
0
Total Number of Responses to
215
146
60
9
0
GAC Offers
Total Number of Properties with
123
82
39
2
0
GAC System Installed
Total Number of Properties with
Both RO and GAC Systems
4
3
0
1
0
Installed
Total Number of Properties
4
0
3
1
0
Connected to Public Water
TR1043 — Monthly Report — February 2024 11 March 2024

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5 DATA GATHERING
Chemours and its contractors continue to reach out, as necessary, to various entities to request
additional information that will support the objectives of the Interim Plan.
Geosyntec previously transmitted data request letters to each of the counties, Lower Cape Fear
Water and Sewer Authority (LCFWASA), Cape Fear Public Utility Authority (CFPUA), Aqua of
NC, Inc., Town of Wrightsville Beach, and Town of Carolina Beach. Geosyntec has also requested
copies of any available private drinking well logs or construction records from Brunswick,
Columbus, Pender, and New Hanover counties. Details on the dates of correspondence and a
summary of the data requested and received from each county or entity contacted are provided in
previous monthly reports (e.g., Geosyntec, 2023c). Additionally, Geosyntec received and reviewed
the GW-1 database, which includes location and well depth information for private wells. The
GW-1 database was transmitted via email to Geosyntec by Eric Aufderhaar of NCDEQ on
February 10, 2023.
On June 9, 2022, NCDEQ provided Chemours with contact information for 40 community and
non -community water systems in the four counties, which includes 121 groundwater wells. To fill
data gaps, Chemours reached out to the contacts for lists of customers connected to these systems
and for any available PFAS data. The list of public water providers contacted for this information
and data received to date are provided in previous monthly reports (e.g., Geosyntec, 2023c).
Chemours continues to maintain a list of the community wells being sampled and provides a
tracking file to DEQ on a weekly basis. The community well tracking sheet is provided in
Table A.S. As of February 29, 2024, 28 of these community wells have been sampled. Analytical
results have been received for all 28 community well systems sampled, and in total, there are
eleven CO exceedances (which are accounted for in the counts provided in Tables 5 and 6 in
Sections 4.1 and 4.2, respectively).
TR1043 — Monthly Report — February 2024 12 March 2024

Geosyntec
consultants
e;rns��lec L:arms1 om n[Nc. P.C.
N C f.icenee Nw C• 35 0and f_295
INTERIM PLAN UPDATES/MODIFICATIONS
There were no updates or modifications to the Interim Plan in the month of February 2024.
TR1043 — Monthly Report — February 2024 13 March 2024

Geosyntec
consultants
carmslmnm-FNC. r.C.
KC f.icemee tilt: C. S5W and 1: 295
r�KIIJ►A nA I_'I;7•g
In accordance with the Interim Plan (Version 3; Geosyntec, 2022a), Representative Sampling
activities have been ongoing since February 15, 2022 and included implementation of the
community outreach, screening of requests received through the call line and the online web form,
and sampling of eligible private wells and resampling of NCDEQ locations.
The mailing of an initial batch of letters as part of community outreach was initiated in June 2022.
Mailing of well information and sampling offer letters to other potentially eligible properties has
been ongoing since July 2022 based on additional information available (e.g., proximity to known
CO exceedances of Attachment C PFAS concentrations, and proximity to water and/or sewer lines)
and will continue in upcoming months.
As of February 29, 2024, 83,086 properties across the four counties were contacted via community
outreach and responses have been received from 32,281 properties.
As of February 29, 2024, a total of 31,852 properties were screened for eligibility (including shared
and community wells) and 10,406 were eligible for sampling. Samples were collected from 7,062
properties as of February 29, 2024, and analytical results have been received for 6,842 of these
properties, where 3,440 are in New Hanover (eight are NCDEQ resampling locations, and five out
of these eight are private wells used for irrigation purposes), 2,452 are in Pender, 775 are in
Brunswick and 175 are in Columbus.
PFAS concentrations in 1,540 out of 6,842 properties with results to date exceeded the CO criteria.
Including the properties connected to shared wells or community well systems, there were
1,780 properties that exceeded the CO criteria. As of February 29, 2024, 848 properties were
receiving bottled water as interim replacement drinking water.
As of February 29, 2024, 1,705 eligible owners/residents were provided either an RO or GAC
offer letter with their results, which also provided instructions for indicating their preference for a
permanent drinking water supply for their property. Residences who exceed the CO criteria but
were also known to be connected to public water, empty lots or vacant were not mailed an RO or
GAC offer letter. RO or GAC offer letters will be provided to these properties in the future, if new
information about the property use and/or primary drinking water source become available.
Among the 1,705 properties sent an offer letter, 1,333 have responded. RO systems, GAC systems,
and both RO and GAC systems have been installed at 760, 123, and 4 properties, respectively. For
public water connections, 199 agreements have been signed and 60 public water connections have
been completed to date. If after 90 days, owners/residents have not responded to the RO or GAC
offer letter, a total of four follow-up offer letters will be mailed on a quarterly basis. Updates on
owner/resident responsiveness will be reported and communicated to DEQ in future monthly
reports.
Responsiveness to data requests has varied, with counties/utilities being able or willing to respond
to different requests. Chemours has used online and third -party resources to gather as much data
as possible to implement the Representative Sampling Program and continues to communicate on
TR1043 — Monthly Report — February 2024 14 March 2024

Geosyntec
consultants
Geo'mu L:ous+kum or NC. P.C.
NC I.wmw Nw G 3500 and f 295
a regular basis with NCDEQ regarding updated data sources and data gaps, including sampling of
community wells.
The response rate from community outreach was 39% as of February 29, 2024, and will continue
to be monitored and reported in future monthly reports. For owners/residents who have not
responded to the well information and sampling offer letter mailing effort, another quarterly
follow-up letter (in addition to the previous ones outlined in Section 2.1) will be sent via mail.
TR1043 — Monthly Report — February 2024 15 March 2024

Geosyntec
consultants
e;rns��lec Carmslmnm n[ Nc. P.C.
N C f.icenee Nw C• 35 0and f_295
E. RD1W01Rpie ["i
Geosyntec, 2022a. Interim Four Counties Sampling and Drinking Water Plan (New Hanover,
Brunswick, Columbus and Pender Counties) version 3, Chemours Fayetteville Works. June
1, 2022.
Geosyntec, 2022b. Four Counties Private Well Sampling Monthly Report — September 2022,
Chemours Fayetteville Works. October 14, 2022.
Geosyntec, 2022c. Geosyntec Consultants of NC, P.C. 2022. Framework to Assess Table 3+ PFAS
in New Hanover, Brunswick, Columbus and Pender Counties: Chemours Fayetteville Works.
May 12, 2022.
Geosyntec, 2023a. Four Counties Private Well Sampling Monthly Report — November 2023,
Chemours Fayetteville Works. December 15, 2023.
Geosyntec, 2023b. Four Counties Private Well Sampling Monthly Report — December 2022,
Chemours Fayetteville Works. January 16, 2023.
Geosyntec, 2023c. Four Counties Private Well Sampling Monthly Report — May 2023, Chemours
Fayetteville Works. June 15, 2023.
Geosyntec, 2023d. Four Counties Private Well Sampling Monthly Report — August 2023,
Chemours Fayetteville Works. September 15, 2023.
Geosyntec, 2023e. Four Counties Private Well Sampling Monthly Report — October 2023,
Chemours Fayetteville Works. November 15, 2023.
North Carolina Department of Environmental Quality (NCDEQ). Re: Notice Regarding
Chemours' Obligations Under Consent Order and 1 SA NCAC 02L .0106 - Offsite
Groundwater Assessment and Provision of Replacement Drinking Water Supplies. May 2,
2022.
NCDEQ. Re: Response to Four Counties Assessment Workplan — Response to Chemours March
16, 2023 Comments. May 9, 2023.
TR1043 — Monthly Report — February 2024 16 March 2024

Figures
TR1043 — Monthly Report — February 2024

ROBESON
CUMBERLAND
BLAD
COLUMBUS
SAMPSON
BRUNSWICK
DUPLIN
PENDER
NEW HANOVER
ONSLOW
Legend
Cape Fear River
QSite Boundary
Four Counties Boundary
Surrounding North Carolina County
Notes:
1. County boundaries and major hydrography waterbodies were downloaded from
INC OneMap site (https://www.nconemap.gov).
2. Basemap source: Esri, HERE, Garmin, (c) OpenStreetMap contributors, and the
GIs user community.
Site Location
Chemours Fayetteville Works
North Carolina
GeosyntecO Geosyntec Consultants of NC, P.C. Figure
consultants NC License No.: C 3500 and C 295
Raleigh March 2024 1

N
BLADEN
COLUMBUS
•
O
Q
BRUNSWICK
O ct
O
PR
►•7
03 O
i
N�EW/ HANOV/ER
Legend
Q Requests Through Call Line or Web Form
NCDEQ Resampling Location
O Screened Well Information Letters
O Eligible For Sampling
O Eligibility Status Pending
• Not Currently Eligible for Sampling
River Buffer'
_Cape Fear River and Other Major Hydrography
Waterbodies
Four Counties Boundary
Surrounding North Carolina County
Notes:
NCDEQ -The North Carolina Department of Environmental Quality
1. The river buffer includes (i) the extent of the 100-year floodplain associated with
Cape Fear River as provided by the Federal Emergency Management Agency
(FEMA); (ii) the limits of saltwater marshes in the areas where Black River and
Northeast Cape Fear River meet Cape Fear to account for the possibility of tidal
backwash of Cape Fear River into these rivers; and (iii) the last half mile floodplain
of each tributary before it joins the Cape Fear River.
2. County boundaries and major hydrography waterbodies were downloaded from
NC OneMap site (https://www.nconemap.gov).
3. Basemap source: Esri, HERE, Garmin, (c) OpenStreetMap contributors, and the
GIs user community.
4 2 0 4 Miles
Sampling Eligibility Screening - February 2024
Brunswick County
Chemours Fayetteville Works
North Carolina
Geosyntecl:' Geosyntec Consultants of NC, RC. Figure
consultants NC License No.: C-3500 and C-295
2A
Raleigh March 2024

N SA P ON Legend
/ Q Requests Through Call Line or Web Form
NCDEQ Resampling Location
PENDER
O Screened Well Information Letters
O Eligible For Sampling
ROBESON BLADEN O Eligibility Status Pending
0 Q 0 Not Currently Eligible for Sampling
Sg � River Buffer'
0 Cape Fear River and Other Major Hydrography
0 O 0 _ Waterbodies
O O O 0 Four Counties Boundary
00 0 Surrounding North Carolina County
0
0 �
O � O g)g � 0 0 � 0 � Cb O O 0 O
00 0 � 0
0 0
COLUMBUS � ��
Q 0 Q
00 0
0
0
O
=_ 0
0
O Notes:
O NCDEQ -The North Carolina Department of Environmental Quality
1. The river buffer includes (i) the extent of the 100-year floodplain associated with
Cape Fear River as provided by the Federal Emergency Management Agency
(FEMA); (ii) the limits of saltwater marshes in the areas where Black River and
Northeast Cape Fear River meet Cape Fear to account for the possibility of tidal
backwash of Cape Fear River into these rivers; and (iii) the last half mile floodplain
O 0 of each tributary before it joins the Cape Fear River.
O 2. County boundaries and major hydrography waterbodies were downloaded from
NC OneMap site (https://www.nconemap.gov).
0 g BRUNSWICK 3. Basemap source: Esri, HERE, Garmin, (c) OpenStreetMap contributors, and the
GIs user community.
0
4 2 0 4 Miles
Sampling Eligibility Screening - February 2024
Columbus County
Chemours Fayetteville Works
North Carolina
GeosyntecO Geosyntec Consultants of NC, P.C. Figure
NC License No.: C-3500 and C-295
Q
consultants
2B
Raleigh March 2024
a Pm t- NAD83 North C... RUS: U— In Foot US

N N �� Legend
N PENDEI 0 Requests Through Call Line or Web Form
NCDEQ Resampling Location
L_�\✓`1f� � Screened Well Information Letters
Eligible For Sampling
\ Eligibility Status Pending
O • Not Currently Eligible for Sampling
River Buffer'
COLUMBUS 0
� _Cape Fear River and Other Major Hydrography
Waterbodies
• Four Counties Boundary
a 1 //�� • • Surrounding North Carolina County
i O
NEW HANOVER
>�♦ i
O
O
BRUNSWICK� O
Notes:
NCDEQ -The North Carolina Department of Environmental Quality
1. The river buffer includes (i) the extent of the 100-year floodplain associated with
Cape Fear River as provided by the Federal Emergency Management Agency
(FEMA); (ii) the limits of saltwater marshes in the areas where Black River and
Northeast Cape Fear River meet Cape Fear to account for the possibility of tidal
backwash of Cape Fear River into these rivers; and (iii) the last half mile floodplain
/ O of each tributary before it joins the Cape Fear River.
2. County boundaries and major hydrography waterbodies were downloaded from
NC OneMap site (https://www.nconemap.gov).
3. Basemap source: Esri, HERE, Garmin, (c) OpenStreetMap contributors, and the
GIs user community.
4 2 0 4 Miles
Sampling Eligibility Screening - February 2024
New Hanover County
Chemours Fayetteville Works
North Carolina
i
GeosMteC� GeosyntecConsultantsofNC,P.C. Figure
✓ g
NC License No.: C-3500 and C-295
consultants
ZC
Raleigh March 2024

N
Legend
Q Requests Through Call Line or Web Form
DUPLIN
NCDEQ Resampling Location
O Screened Well Information Letters
O Eligible For Sampling
O Eligibility Status Pending
• Not Currently Eligible for Sampling
River Buffer'
SAMPSON
_Cape Fear River and Other Major Hydrography
Waterbodies
ONSLOW
Four Counties Boundary
Surrounding North Carolina County
•
O
O
0
0
0
O
r
•
OO
E
PENDER
O
O
-
BLADEN
O
E
,, O
•
� O
•
Q
OO
E
0
O
( O cl�
U
Notes:
NCDEQ -The North Carolina Department of Environmental Quality
_
•
1. The river buffer includes (i) the extent of the 100-year floodplain associated with
Cape Fear River as provided by the Federal Emergency Management Agency
(FEMA); (ii) the limits of saltwater marshes in the areas where Black River and
�I
Northeast Cape Fear River meet Cape Fear to account for the possibility of tidal
rk
backwash of Cape Fear River into these rivers; and (iii) the last half mile floodplain
O
of each tributary before it joins the Cape Fear River.
i
2. County boundaries and major hydrography waterbodies were downloaded from
t ���,✓�
•
NC OneMap site (https://www.nconemap.gov).
3. Basemap source: Esri, HERE, Garmin, (c) OpenStreetMap contributors, and the
GIs user community.
a
`
E
4 2 0 4 Miles
-
0
Sampling Eligibility Screening - February 2024
COLUMBUS
Pender County
NEW HANOVER
-
BRUNSWICK
Chemours Fayetteville Works
AW
North Carolina
_
uu�. s
Geosyntec� GeosyntecConsultantsofNC,RC.
Figure
NC License No.: C-3500 and C-295
consultants
2D
a Projection: NAD83
North C...—US : U— In Foot US
�j
Raleigh
March 2024

N KE CUMBERLAND
ROBESON
BLAD
O
•
SAMPSON
BRUNSWICK
DUPLIN
•
PENDER
O
O
� ;`10601-
Ll
JNEW HANOVER0
Legend
• Resident Indicated Connection to Public Water
O Does Not Meet Sampling Eligibility Criteria'
• Other - Incomplete Information, Vacant/Empty Lot
River Buffer'
_Cape Fear River and Other Major Hydrography
Waterbodies
ONSLOW Four Counties Boundary
Surrounding North Carolina County
Notes:
1. Sampling Eligibility Criteria, as defined in the Interim Four Counties Sampling and
Drinking Water Plan (New Hanover, Brunswick, Columbus and Fender Counties),
version 3, dated June 1, 2022.
2. The river buffer includes (i) the extent of the 100-year floodplain associated with
Cape Fear River as provided by the Federal Emergency Management Agency
(FEMA); (ii) the limits of saltwater marshes in the areas where Black River and
Northeast Cape Fear River meet Cape Fear to account for the possibility of tidal
backwash of Cape Fear River into these rivers; and (III) the last half mile floodplain
of each tributary before it joins the Cape Fear River.
3. County boundaries and major hydrography waterbodies were downloaded from
NC OneMap site (https://www.nconemap.gov).
4. Basemap source: Esri, HERE, Garmin, (c) OpenStreetMap contributors, and the
GIs user community.
4 2 0 4 Miles
Sampling Eligibility Details - February 2024
Chemours Fayetteville Works
North Carolina
GeosMtecl�' Geosyntec Consultants of NC, RC. Figure
consultants NC License No.: C-3500 and C-295
3
Raleigh March 2024

CUMBERLAND
ROBESON
BLAD
0
• 00
0
• •O
• cb e
0 0 • • %•b 96 • • CZo i
• 4•• • 0
• �O
•O0 COLUMBUS
80 CC)
• 00
0b O
6 O
0 00 0® O O
O 0
O O
08 00
O S
O O 00
A
O
o
o •7,•4
® 0 e �t •
o
e
SAMPSON
o � Ir
Mb
A
BRUNSWICK
DUPLIN
Legend
O Samples Collected (February 2024)
0 Samples Previously Collected
River Buffer'
_Cape Fear River and Other Major Hydrography
Waterbodies
0 Four Counties Boundary
ONSLOW Surrounding North Carolina County
Notes:
1. The river buffer includes (i) the extent of the 100-year floodplain associated with
Cape Fear River as provided by the Federal Emergency Management Agency
(FEMA); (ii) the limits of saltwater marshes in the areas where Black River and
Northeast Cape Fear River meet Cape Fear to account for the possibility of tidal
backwash of Cape Fear River into these rivers; and (iii) the last half mile floodplain
of each tributary before it joins the Cape Fear River.
2. County boundaries and major hydrography waterbodies were downloaded from
INC OneMap site (https://www.nconemap.gov).
3. Basemap source: Esri, HERE, Garmin, (c) OpenStreetMap contributors, and the
GIs user community.
►����•I•nr�
Summary of Private Well Sampling
February 2024 and Cumulative
Chemours Fayetteville Works
North Carolina
GeosyntecO Geosyntec Consultants of NC, RC. Figure
consultants NC License No.: C-3500 and C-295
4
Raleigh March 2024

N KE CUMBERLAND
DUPLIN
SAMPSON
ROBESON 0
BLAD � °
O,0
o PENDER O o 0 0
O
�o •
O� •
° O o O
°OO Q) ° oo
O O 0N3
0900 °
O O
• o. • �• O
O
°O ° ° 900O�jo °�O Oho o WD O / • ° ° 0
°
o
°O Cols' ° � • • • O c� ° o
COLUMBUS o 0 0 0
80 iti NEW�HANOVEF
go U oft o ° •
O o°Oo o •
O 00 og 0 • / °
O
O
O
O� O O
BRUNSWICK
• �� °
• ° n ®° r
• R�
� p0 �
O •
O0 0
• /
Legend
• HFPO-DA >_ 10 ng/L
O Total Attachment C >_ 70 ng/L
O Single Attachment C PFAS >_ 10 ng/L
O No Action
0 O Result Received in the Reporting Period
WD ONSLOW River Buffer'
_Cape Fear River and Other Major Hydrography
Waterbodies
QFour Counties Boundary
Surrounding North Carolina County
Notes:
ng/L - Nanograms per liter
HFPO-DA - Hexafluoropropylene oxide dimer acid
PFAS - per- and polyfluoroalkyl substances
1. The river buffer includes (i) the extent of the 100-year floodplain associated with
Cape Fear River as provided by the Federal Emergency Management Agency
(FEMA); (ii) the limits of saltwater marshes in the areas where Black River and
Northeast Cape Fear River meet Cape Fear to account for the possibility of tidal
backwash of Cape Fear River into these rivers; and (iii) the last half mile floodplain
of each tributary before it joins the Cape Fear River.
2. County boundaries and major hydrography waterbodies were downloaded from
NC OneMap site (https://www.nconemap.gov).
3. Basemap source: Esri, HERE, Garmin, (c) OpenStreetMap contributors, and the
GIS user community.
4 2 0 4 Miles
Attachment C PFAS Analytical Results
February 2024 and Cumulative
Chemours Fayetteville Works
North Carolina
GeosyntecO Geosyntec Consultants of NC, RC. Figure
consultants NC License No.: C-3500 and C-295
5
Raleigh March 2024

Appendix A
Supplemental Tables and Figures
TR 1043 — Monthly Report — February 2024

Geosyntec Consultants of NC, P.C.
TABLE A.1
PFAS ANALYTES
Chemours Fayetteville Works, North Carolina
PFAS Grouping (Method)
Attachment
Table 3+
Other PFAS
Common Name
Chemical Name
CASRN
Chemical Formula
(Table 3+
(Method 537
C PFAS
SOP)
Mod
HFPO-DA'
✓
✓
✓
Hexafluoropropylene oxide dimer acid
13252-13-6
C6HF1103
PEPA
✓
✓
--
Perfluoro-2-ethoxypropionic acid
267239-61-2
C51-117903
PFECA-G
✓
✓
--
Perfluoro-4-isopropoxybutanoic acid
801212-59-9
C1211917903S
PFMOAA
✓
✓
--
Perfluoro-2-methoxyacetic acid
674-13-5
C31-117503
PF02HxA
✓
✓
--
Perfluoro-3,5-dioxahexanoic acid
39492-88-1
C41-117704
PF030A
✓
✓
--
Perfluoro-3,5,7-trioxaoctanoic acid
39492-89-2
C51-117905
PF04DA
✓
✓
--
Perfluoro-3,5,7,9-tetraoxadecanoic acid
39492-90-5
C61-1171106
PMPA
✓
✓
--
Perfluoro-2-methoxypropionic acid
13140-29-9
C4HF703
2,2,3,3-tetrafluoro-3-(11,1,1,2,3,3-hexafluoro-3-[(1,2,2,2-
Hydro -EVE Acid
__
✓
__
773804-62-9
C8112F1404
tetrafluoroethyl)oxy]propan-2-yl}oxy)propionic acid
2,2,3,3-tetrafluoro-3-(11,1,1,2,3,3-hexafluoro-3-[(11212-
EVE Acid
__
✓
__
69087-46-3
C811171304
trifluoroethenyl)oxy]propan-2-yl}oxy)propionic acid
PFECA B
--
✓
--
Perfluoro-3,6-dioxaheptanoic acid
151772-58-6
C51-117904
Pentanoic acid, 4-(2-carboxy- 1, 1,2,2-tetrafluoroethoxy)-
R-EVE
__
✓
__
2416366-22-6
C8H2F1205
2,2,3,3,4,5,5,5-octafluoro-
PF05DA
✓
✓
--
Perfluoro-3,5,7,9,11-pentaoxadodecanoic acid
39492-91-6
C71-1171307
Pentanoic acid, 2,2,3,3,4,5,5,5-octafluoro-4-(1,1,2,2-
R-PSDA
__
✓
--
2416366-18-0
C7H2F1206S
tetrafluoro-2-sulfoethox -
TR1043 Page 1 of 5 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.1
PFAS ANALYTES
Chemours Fayetteville Works, North Carolina
PFAS Grouping (Method)
Attachment
Table 3+
Other PFAS
Common Name
Chemical Name
CASRN
Chemical Formula
(Table 3+
(Method 537
C PFAS
SOP)
Mod
Ethanesulfonic acid, 1,1,2,2-tetrafluoro-2-[1,2,2,3,3-
R-PSDCA
__
✓
--
2416366-21-5
C6H2F12O4S
pentafluoro- l -(trifluoromethyl)propoxy]-
Acetic acid, 2-fluoro-2-[1,1,2,3,3,3-hexafluoro-2-(1,1,2,2-
Hydrolyzed PSDA
__
✓
__
2416366-19-1
C7H3F1107S
tetrafluoro-2-sulfoethoxy)propoxy]-
1,1,2,2,4,5,5,5-heptafluoro-3-oxapentanesulfonic acid; or 2-
NVHOS
--
✓
--
(1,2,2,2-ethoxy)tetrafluoroethanesulfonic acid; or 1-(1,1,2,2-
801209-99-4
C4H217804S
tetrafluoro-2-sulfoethoxy)-1,2,2,2-tetafluoroethane
PES
--
✓
--
Perfluoro-2-ethoxyethanesulfonic acid
113507-82-7
C4HF904S
Ethanesulfonic acid, 2-[l-[difluoro[(1,2,2-
PS Acid
✓
✓
--
trifluoroethenyl)oxy]methyl]-1,2,2,2-tetrafluoroethoxy]-
29311-67-9
C7HF1305S
1,1,2,2-tetrafluoro-
Ethanesulfonic acid, 2-[l-[difluoro(1,2,2,2-
Hydro-PS Acid
✓
✓
--
tetrafluoroethoxy)methyl]-1,2,2,2-tetrafluoroethoxy]-1,1,2,2-
749836-20-2
C7H2F14O5S
tetrafluoro-
PFHpAI
✓
--
✓
Perfluoroheptanoic acid
375-85-9
C7HF1302
PFBA
--
--
✓
Perfluorobutanoic acid
375-22-4
C4HF702
PFPeA
--
--
✓
Perfluoropentanoic acid
2706-90-3
C5HF902
PFHxA
--
--
✓
Perfluorohexanoic acid
307-24-4
C6HF1102
PFOA
--
--
✓
Perfluorooctanoic acid
335-67-1
C8HF150
PFNA
--
--
✓
Perfluorononanoic acid
375-95-1
C9HF1702
PFDA
--
--
✓
Perfluorodecanoic acid
335-76-2
ClOHF1902
TR1043 Page 2 of 5 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.1
PFAS ANALYTES
Chemours Fayetteville Works, North Carolina
Common Name
PFAS Grouping (Method)
Chemical Name
CASRN
Chemical Formula
Attachment
C PFAS
Table 3+
(Table 3+
SOP)
Other PFAS
(Method 537
Mod
PFUnDA
--
--
✓
Perfluoroundecanoic acid
2058-94-8
C11HF2102
PFDoDA
--
--
✓
Perfluorododecanoic acid
307-55-1
C12HF2302
PFTriDA
--
--
✓
Perfluorotridecanoic acid
72629-94-8
C13HF2502
PFTeDA
--
--
✓
Perfluorotetradecanoic acid
376-06-7
C14HF2702
PFHxDA
--
--
✓
Perfluorohexadecanoic acid
67905-19-5
C16HF3102
PFODA
--
--
✓
Perfluorooctadecanoic acid
16517-11-6
C18HF3502
PFBS
--
--
✓
Perfluorobutanesulfonic acid
375-73-5
C4HF9SO
PFPeS
--
--
✓
Perfluoropentanesulfonic acid
2706-91-4
C5HF1103S
PFHxS
--
--
✓
Perfluorohexanesulfonic acid
355-46-4
C6HF13SO3
PFHpS
--
--
✓
Perfluoroheptanesulfonic acid
375-92-8
C7HF1503S
PFOS
--
--
✓
Perfluorooctanesulfonic acid
1763-23-1
C8HF17SO3
PFNS
--
--
✓
Perfluorononanesulfonic acid
68259-12-1
C9HF1903S
PFDS
--
--
✓
Perfluorodecanesulfonic acid
335-77-3
C10HF2103S
PFDoDS
--
--
✓
Perfluorododecanesulfonic acid
79780-39-5
C12HF2503S
4:2 FTS
--
--
✓
4:2 Fluorotelomer sulfonic acid
757124-72-4
C6H5F903S
TR1043 Page 3 of 5 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.1
PFAS ANALYTES
Chemours Fayetteville Works, North Carolina
Common Name
PFAS Grouping (Method)
Chemical Name
CASRN
Chemical Formula
Attachment
C PFAS
Table 3+
(Table 3+
SOP)
Other PFAS
(Method 537
Mod
6:2 FTS
--
--
✓
6:2 Fluorotelomer sulfonic acid
27619-97-2
C8H5F13S03
8:2 FTS
--
--
✓
8:2 Fluorotelomer sulfonic acid
39108-34-4
C10H5F1703S
10:2 FTS
--
--
✓
10:2 Fluorotelomer sulfonic acid
120226-60-0
C12115172103
NEtPFOSAA
--
--
✓
N-ethyl perfluorooctane sulfonamidoacetic acid
2991-50-6
C121181717N04S
NEtPFOSA
--
--
✓
N-ethylperfluoro-l-octanesulfonamide
4151-50-2
C101161717NO2S
NEtPFOSAE
--
--
✓
N-ethyl perfluorooctane sulphonamidoethanol
1691-99-2
C12H10F17NO3S
NMePFOSAA
--
--
✓
N-methyl perfluorooctane sulfonamidoacetic acid
2355-31-9
C11H61717N04S
NMePFOSA
--
--
✓
N-methylperfluoro-l-octanesulfonamide
31506-32-8
C91-14F17NO2S
NMePFOSAE
--
--
✓
N-methyl perfluorooctane sulfonamidoethanol
24448-09-7
C11H8F17NO3S
PFOSA
--
--
✓
Perfluorooctane sulfonamide
754-91-6
C81121717NO2S
F-53B Major
--
--
✓
Perfluoro(2-((6-chlorohexyl)oxy)ethanesulfonic acid)
756426-58-1
C811C1F1604S
F-53B Minor
--
--
✓
Perfluoro(2-((8-chlorooctyl)oxy)ethanesulfonic acid)
763051-92-9
C10HCIF2004S
TR1043 Page 4 of 5 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.1
PFAS ANALYTES
Chemours Fayetteville Works, North Carolina
PFAS Grouping (Method)
Attachment
Table 3+
Other PFAS
Common Name
Chemical Name
CASRN
Chemical Formula
(Table 3+
(Method 537
C PFAS
SOP)
Mod
ADONA
--
--
✓
4,8-dioxa-3H-perfluorononanoate
958445-44-8
C71-12171204
NaDONA
--
--
✓
NaDONA
EVS1361
--
2' 2' 3-Trifluoro-3-(1' 1' 2' 2' 3' 3-hexafluoro-3-
DONA
--
--
✓
919005-14-4
C71-12171204
(trifluoromethoxy)propoxy)propanoic acid
Notes:
1 - HFPO-DA and PFHpA can be analyzed under methods Table 3+ SOP and EPA Method 537 Mod.
CASRN - Chemical Abstract Service Registry Number
EPA - Environmental Protection Agency
PFAS - Per- and Polyfluoroalkyl substances
SOP - Standard Operating Procedure
TR1043 Page 5 of 5 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.2
ATTACHMENT C PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1016611
1075312
1088211
1104154
1115870
1139113
1154543
1167076
1167076
1172123
1175525
1184643
1185696
1209035
Sample Purpose
FS
FS
FS
FS
FS
FS
FS
FS
DUP
FS
FS
FS
FS
FS
Sample Date
17-Jan-24
17-Jan-24
17-Jan-24
17-Jan-24
17-Jan-24
17-Jan-24
17-Jan-24
17-Jan-24
17-Jan-24
17-Jan-24
17-Jan-24
17-Jan-24
17-Jan-24
17-Jan-24
Sample Delivery Group
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
Lab Sample ID
320-109018-8
320-109018-6
320-109018-16
320-109018-12
320-109018-3
320-109018-5
320-109018-14
320-109018-9
320-109018-10
320-109018-15
320-109018-1
320-109018-7
320-109018-13
320-109018-2
CO Attachment C PFAS (ng/L)
Hfpo Dimer Acid
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
PFMOAA
<2
3
<2
<2
2.3
2.2
<2
<2
<2
4.2
<2
<2
<2
<2
PFO2HxA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO3OA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO4DA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO5DA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PMPA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PEPA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PS Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Hydro -PS Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA-G
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Perfluoroheptanoic Acid
1 <2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Total CO Attachment C PFAS (ng/L)
ND
3
ND
ND
2
2
ND
ND
ND
4
ND
ND
ND
ND
TR1043 Page 1 of 16 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.2
ATTACHMENT C PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1213140
1036893
1098310
1099558
1109808
1138013
1151744
1169360
1184968
1196187
1202626
1203647
1213305
1213305
Sample Purpose
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
DUP
Sample Date
17-Jan-24
18-Jan-24
18-Jan-24
18-Jan-24
18-Jan-24
18-Jan-24
18-Jan-24
18-Jan-24
18-Jan-24
18-Jan-24
18-Jan-24
18-Jan-24
18-Jan-24
18-Jan-24
Sample Delivery Group
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
Lab Sample ID
320-109018-4
320-109018-27
320-109018-28
320-109018-29
320-109018-26
320-109018-25
320-109018-22
320-109018-23
320-109018-30
320-109018-24
320-109018-21
320-109018-17
320-109018-18
320-109018-19
CO Attachment C PFAS (ng/L)
Hfpo Dimer Acid
<4
<4
<4
<4
<4
<4
13
<4
<4
<4
<4
<4
<4
<4
PFMOAA
<2
<2
<2
<2
<2
<2
680
<2
4.5
<2
<2
<2
<2
<2
PFO2HxA
<2
<2
<2
<2
<2
<2
69
<2
<2
<2
<2
<2
<2
<2
PFO3OA
<2
<2
<2
<2
<2
<2
5.8
<2
<2
<2
<2
<2
<2
<2
PFO4DA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO5DA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PMPA
<2
<2
<2
<2
<2
<2
9.9
<2
<2
<2
<2
<2
<2
<2
PEPA
<2
<2
<2
<2
<2
<2
3
<2
<2
<2
<2
<2
<2
<2
PS Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Hydro -PS Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA-G
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Perfluoroheptanoic Acid
1 <2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Total CO Attachment C PFAS (ng/L)
ND
ND
ND
ND
ND
ND
781
ND
5
ND
ND
ND
ND
ND
TR1043 Page 2 of 16 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.2
ATTACHMENT C PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1066037
1153518
1171552
1172458
1176702
1185925
1187554
1210611
1210679
1270027
1010424
1032476
1087639
1102673
Sample Purpose
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
Sample Date
19-Jan-24
19-Jan-24
19-Jan-24
19-Jan-24
19-Jan-24
19-Jan-24
19-Jan-24
19-Jan-24
19-Jan-24
19-Jan-24
22-Jan-24
22-Jan-24
22-Jan-24
22-Jan-24
Sample Delivery Group
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
410-158389-1
410-158389-1
410-158389-2
410-158389-2
Lab Sample ID
320-109018-35
320-109018-37
320-109018-40
320-109018-39
320-109018-36
320-109018-31
320-109018-32
320-109018-38
320-109018-34
320-109018-33
410-158389-17
410-158389-4
410-158389-24
410-158389-23
CO Attachment C PFAS (ng/L)
Hfpo Dimer Acid
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<3
<3
<3
<3
PFMOAA
<2
<2
<2
<2
2.3
3.1
<2
<2
<2
<2
<2
<2
<2
5.3
PFO2HxA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO3OA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO4DA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO5DA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<5
<5
<5
<5
PMPA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PEPA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PS Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<5
<5
<5
<5
Hydro -PS Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA-G
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Perfluoroheptanoic Acid
1 <2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Total CO Attachment C PFAS (ng/L)
ND
ND
ND
ND
2
3
ND
ND
ND
ND
ND
ND
ND
5
TR1043 Page 3 of 16 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.2
ATTACHMENT C PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1153483
1154000
1173166
1174844
1183744
1195363
1195363
1198522
1210326
1213039
1213406
1119160
1138691
1142275
Sample Purpose
FS
FS
FS
FS
FS
FS
DUP
FS
FS
FS
FS
FS
FS
FS
Sample Date
22-Jan-24
22-Jan-24
22-Jan-24
22-Jan-24
22-Jan-24
22-Jan-24
22-Jan-24
22-Jan-24
22-Jan-24
22-Jan-24
22-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
Sample Delivery Group
410-158389-2
410-158389-1
410-158389-1
410-158389-1
410-158389-1
410-158389-1
410-158389-1
410-158389-1
410-158389-1
410-158389-1
410-158389-2
410-158389-2
410-158389-2
410-158389-2
Lab Sample ID
410-158389-21
410-158389-19
410-158389-2
410-158389-18
410-158389-16
410-158389-10
410-158389-11
410-158389-20
410-158389-3
410-158389-1
410-158389-22
410-158389-26
410-158389-32
410-158389-27
CO Attachment C PFAS (ng/L)
Hfpo Dimer Acid
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFMOAA
<2
<2
<2
<2
<2
<2 UJ
<2
<2
<2
<2
<2
<2
<2
<2
PFO2HxA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO3OA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO4DA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO5DA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
PMPA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PEPA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PS Acid
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
Hydro -PS Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA-G
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Perfluoroheptanoic Acid
1 <2
1 <2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Total CO Attachment C PFAS (ng/L)
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
TR1043 Page 4 of 16 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.2
ATTACHMENT C PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1167463
1170165
1173647
1184679
1190143
1208701
1210369
1210371
1210373
1210570
1213353
1213422
1213422
1213432
Sample Purpose
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
DUP
FS
Sample Date
23-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
Sample Delivery Group
410-158389-2
410-158389-1
410-158389-2
410-158389-1
410-158389-2
410-158389-2
410-158389-2
410-158389-2
410-158389-2
410-158389-1
410-158389-1
410-158389-1
410-158389-1
410-158389-1
Lab Sample ID
410-158389-34
410-158389-8
410-158389-25
410-158389-9
410-158389-29
410-158389-30
410-158389-33
410-158389-31
410-158389-28
410-158389-7
410-158389-5
410-158389-13
410-158389-14
410-158389-6
CO Attachment C PFAS (ng/L)
Hfpo Dimer Acid
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFMOAA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
2.9
PFO2HxA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO3OA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO4DA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO5DA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
PMPA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PEPA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PS Acid
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
Hydro -PS Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA-G
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Perfluoroheptanoic Acid
1 <2
<2
<2
2.1
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Total CO Attachment C PFAS (ng/L)
ND
ND
ND
2
ND
ND
ND
ND
ND
ND
ND
ND
ND
3
TR1043 Page 5 of 16 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.2
ATTACHMENT C PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1045860
1058410
1058410
1062171
1073234
1105439
1137580
1151200
1161302
1179828
1184353
1196610
1200512
1200512
Sample Purpose
FS
FS
DUP
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
Sample Date
24-Jan-24
24-Jan-24
24-Jan-24
24-Jan-24
24-Jan-24
24-Jan-24
24-Jan-24
24-Jan-24
24-Jan-24
24-Jan-24
24-Jan-24
24-Jan-24
24-Jan-24
24-Jan-24
Sample Delivery Group
410-158516-1
410-158516-1
410-158516-1
410-158516-1
410-158516-1
410-158516-1
410-158516-1
410-158516-1
410-158516-1
410-158516-1
410-158516-1
410-158516-1
410-158516-1
410-158516-1
Lab Sample ID
410-158516-2
410-158516-10
410-158516-11
410-158516-3
410-158516-9
410-158516-6
410-158516-5
410-158516-17
410-158516-1
410-158516-8
410-158516-7
410-158516-16
410-158516-13
410-158516-14
CO Attachment C PFAS (ng/L)
Hfpo Dimer Acid
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFMOAA
<2
<2
<2
<2
<2
5.1
<2
<2
<2
<2
<2
<2
<2
<2
PFO2HxA
<2
<2
<2
<2
<2
2
<2
<2
<2
<2
<2
<2
<2
<2
PFO3OA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO4DA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO5DA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
PMPA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PEPA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PS Acid
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
Hydro -PS Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA-G
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Perfluoroheptanoic Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Total CO Attachment C PFAS (ng/L)
ND
ND
ND
ND
ND
7
ND
ND
ND
ND
ND
ND
ND
ND
TR1043 Page 6 of 16 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.2
ATTACHMENT C PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1200673
1207906
1010748
1023205
1060980
1072309
1116026
1124701
1133389
1153283
1156459
1182275
1186917
1207015
Sample Purpose
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
Sample Date
24-Jan-24
24-Jan-24
25-Jan-24
25-Jan-24
25-Jan-24
25-Jan-24
25-Jan-24
25-Jan-24
25-Jan-24
25-Jan-24
25-Jan-24
25-Jan-24
25-Jan-24
25-Jan-24
Sample Delivery Group
410-158516-1
410-158516-1
410-158810-1
410-158810-1
410-158720-1
410-158720-1
410-158810-1
410-158810-1
410-158810-1
410-158720-1
410-158810-1
410-158810-1
410-158810-1
410-158720-1
Lab Sample ID
410-158516-4
410-158516-15
410-158810-15
410-158810-14
410-158720-2
410-158720-3
410-158810-16
410-158810-3
410-158810-2
410-158720-1
410-158810-17
410-158810-13
410-158810-12
410-158720-4
CO Attachment C PFAS (ng/L)
Hfpo Dimer Acid
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFMOAA
<2
<2
<2
<2
<2
<2
2.6
<2
<2
<2
<2
<2
<2
<2
PFO2HxA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO3OA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO4DA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO5DA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
PMPA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PEPA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PS Acid
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
Hydro -PS Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA-G
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Perfluoroheptanoic Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Total CO Attachment C PFAS (ng/L)
ND
ND
ND
ND
ND
ND
3
ND
ND
ND
ND
ND
ND
ND
TR1043 Page 7 of 16 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.2
ATTACHMENT C PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1208275
1213226
1213230
1003893
1128969
1131641
1160664
1163434
1166441
1178926
1200843
1213310
1213536
1213536
Sample Purpose
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
DUP
Sample Date
25-Jan-24
25-Jan-24
25-Jan-24
26-Jan-24
26-Jan-24
26-Jan-24
26-Jan-24
26-Jan-24
26-Jan-24
26-Jan-24
26-Jan-24
26-Jan-24
26-Jan-24
26-Jan-24
Sample Delivery Group
410-158810-1
410-158720-1
410-158720-1
410-158810-1
410-158810-1
410-158810-1
410-158810-1
410-158810-1
410-158810-1
410-158810-1
410-158810-1
410-158810-1
410-158810-1
410-158810-2
Lab Sample ID
410-158810-1
410-158720-6
410-158720-5
410-158810-11
410-158810-7
410-158810-10
410-158810-4
410-158810-8
410-158810-9
410-158810-5
410-158810-18
410-158810-6
410-158810-20
410-158810-21
CO Attachment C PFAS (ng/L)
Hfpo Dimer Acid
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFMOAA
<2
<2
<2
<2
<2
<2
<2
5.2
<2
<2
<2
<2
<2
<2
PFO2HxA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO3OA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO4DA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO5DA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
PMPA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PEPA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PS Acid
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
Hydro -PS Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA-G
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Perfluoroheptanoic Acid
1 <2
<2
<2
<2
<2
<2
<2
4.1
<2
<2
<2
<2
<2
<2
Total CO Attachment C PFAS (ng/L)
ND
ND
ND
ND
ND
ND
ND
9
ND
ND
ND
ND
ND
ND
TR1043 Page 8 of 16 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.2
ATTACHMENT C PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1007135
1027280
1036834
1060324
1108492
1163975
1175993
1199700
1199700
1210613
1210677
1210679
1210681
1210683
Sample Purpose
FS
FS
FS
FS
FS
FS
FS
FS
DUP
FS
FS
FS
FS
FS
Sample Date
29-Jan-24
29-Jan-24
29-Jan-24
29-Jan-24
29-Jan-24
29-Jan-24
29-Jan-24
29-Jan-24
29-Jan-24
29-Jan-24
29-Jan-24
29-Jan-24
29-Jan-24
29-Jan-24
Sample Delivery Group
320-109207-1
320-109207-1
320-109207-1
320-109207-1
320-109207-1
320-109207-1
320-109207-1
320-109207-1
320-109207-1
320-109207-1
320-109207-1
320-109207-1
320-109207-1
320-109207-1
Lab Sample ID
320-109207-17
320-109207-11
320-109207-7
320-109207-1
320-109207-15
320-109207-18
320-109207-3
320-109207-8
320-109207-9
320-109207-4
320-109207-12
320-109207-13
320-109207-14
320-109207-16
CO Attachment C PFAS (ng/L)
Hfpo Dimer Acid
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
PFMOAA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO2HxA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO3OA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO4DA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO5DA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PMPA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PEPA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PS Acid
<2 UJ
<2 UJ
<2 UJ
<2 UJ
<2 UJ
<2 UJ
<2 UJ
<2 UJ
<2 UJ
<2 UJ
<2 UJ
<2 UJ
<2 UJ
<2 UJ
Hydro -PS Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA-G
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Perfluoroheptanoic Acid
1 <2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Total CO Attachment C PFAS (ng/L)
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
TR1043 Page 9 of 16 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.2
ATTACHMENT C PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1210685
1210687
1210689
1009359
1032184
1053394
1071681
1087488
1101195
1112061
1112061
1112763
1132425
1197261
Sample Purpose
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
DUP
FS
FS
FS
Sample Date
29-Jan-24
29-Jan-24
29-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
Sample Delivery Group
320-109207-1
320-109207-1
320-109207-1
320-109254-1
320-109254-1
320-109254-1
320-109254-1
320-109254-1
320-109254-1
320-109254-1
320-109254-1
320-109254-1
320-109254-1
320-109254-1
Lab Sample ID
320-109207-6
320-109207-5
320-109207-2
320-109254-12
320-109254-16
320-109254-7
320-109254-5
320-109254-8
320-109254-19
320-109254-1
320-109254-2
320-109254-6
320-109254-4
320-109254-11
CO Attachment C PFAS (ng/L)
Hfpo Dimer Acid
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
PFMOAA
<2
<2
<2
<2
<2
<2
<2
<2
17
3
<2
<2
<2
<2
PFO2HxA
<2
<2
<2
<2
<2
<2
<2
<2
2.1
<2
<2
<2
<2
<2
PFO3OA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO4DA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO5DA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PMPA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PEPA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PS Acid
<2 UJ
<2 UJ
<2 UJ
<2
<2 UJ
<2
<2
<2
<2 UJ
<2 UJ
<2
<2
<2
<2
Hydro -PS Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA-G
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Perfluoroheptanoic Acid
1 <2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Total CO Attachment C PFAS (ng/L)
ND
ND
ND
ND
ND
ND
ND
ND
19
3
ND
ND
ND
ND
TR1043 Page 10 of 16 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.2
ATTACHMENT C PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1203360
1209945
1210148
1210388
1213132
1213198
1269859
1046412
1047765
1070439
1083256
1086328
1091360
1122982
Sample Purpose
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
ITS
FS
Sample Date
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
05-Feb-24
05-Feb-24
05-Feb-24
05-Feb-24
05-Feb-24
05-Feb-24
05-Feb-24
Sample Delivery Group
320-109254-1
320-109254-1
320-109254-1
320-109254-1
320-109254-1
320-109254-1
320-109254-1
410-159829-1
410-159829-1
410-159829-1
410-159829-1
410-159829-1
410-159829-1
410-159829-1
Lab Sample ID
320-109254-17
320-109254-14
320-109254-10
320-109254-15
320-109254-18
320-109254-13
320-109254-9
410-159829-15
410-159829-3
410-159829-7
410-159829-8
410-159829-14
410-159829-9
410-159829-10
CO Attachment C PFAS (ng/L)
Hfpo Dimer Acid
<4
<4
<4
<4
<4
<4
<4
<3
<3
<3
<3
<3
<3
<3
PFMOAA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO2HxA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO3OA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO4DA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO5DA
<2
<2
<2
<2
<2
<2
<2
<5
<5
<5
<5
<5
<5
<5
PMPA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PEPA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PS Acid
<2 UJ
<2 UJ
<2
<2 UJ
<2 UJ
<2
<2
<5
<5
<5
<5
<5
<5
<5
Hydro -PS Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA-G
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Perfluoroheptanoic Acid
1 <2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Total CO Attachment C PFAS (ng/L)
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
TR1043 Page 11 of 16 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.2
ATTACHMENT C PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1123336
1126041
1157646
1160239
1162030
1173383
1185905
1210643
1001021
1051524
1060835
1083625
1108204
1108460
Sample Purpose
ITS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
ITS
FS
Sample Date
05-Feb-24
05-Feb-24
05-Feb-24
05-Feb-24
05-Feb-24
05-Feb-24
05-Feb-24
05-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
Sample Delivery Group
410-159829-1
410-159829-1
410-159829-1
410-159829-1
410-159829-1
410-159829-1
410-159829-1
410-159829-1
410-160110-1
410-160110-1
410-160110-1
410-160110-1
410-160110-1
410-160110-1
Lab Sample ID
410-159829-1
410-159829-6
410-159829-5
410-159829-11
410-159829-2
410-159829-13
410-159829-4
410-159829-12
410-160110-9
410-160110-8
410-160110-15
410-160110-17
410-160110-6
410-160110-16
CO Attachment C PFAS (ng/L)
Hfpo Dimer Acid
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFMOAA
<2
<2
<2
<2
<2
<2
<2
17
<2
770
13
<2
<2
<2
PFO2HxA
<2
<2
<2
<2
<2
<2
<2
21
<2
140
2.8
<2
<2
<2
PFO3OA
<2
<2
<2
<2
<2
<2
<2
<2
<2
14
<2
<2
<2
<2
PFO4DA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO5DA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
PMPA
<2
<2
<2
<2
<2
<2
<2
4.1
<2
7.7
<2
<2
<2
<2
PEPA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PS Acid
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
Hydro -PS Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA-G
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Perfluoroheptanoic Acid
1 <2
1 <2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Total CO Attachment C PFAS (ng/L)
ND
ND
ND
ND
ND
ND
ND
42
ND
932
16
ND
ND
ND
TR1043 Page 12 of 16 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.2
ATTACHMENT C PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1126391
1147726
1158815
1161850
1172107
1172563
1181882
1184297
1184349
1199374
1199374
1017946
1054690
1118249
Sample Purpose
FS
FS
FS
FS
ITS
ITS
FS
FS
FS
ITS
DUP
FS
FS
FS
Sample Date
06-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
07-Feb-24
07-Feb-24
07-Feb-24
Sample Delivery Group
410-160110-1
410-160110-1
410-160110-1
410-160110-1
410-160110-1
410-160110-1
410-160110-1
410-160110-1
410-160110-1
410-160110-1
410-160110-1
410-160110-2
410-160110-2
410-160110-2
Lab Sample ID
410-160110-2
410-160110-13
410-160110-12
410-160110-1
410-160110-14
410-160110-7
410-160110-10
410-160110-18
410-160110-11
410-160110-3
410-160110-4
410-160110-23
410-160110-21
410-160110-28
CO Attachment C PFAS (ng/L)
Hfpo Dimer Acid
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFMOAA
<2
<2
<2
<2
<2
<2
<2
<2 UJ
<2
<2
<2
<2
<2 UJ
<2
PFO2HxA
<2
<2
<2
<2
<2
<2
<2
<2 UJ
<2
<2
<2
<2
<2 UJ
<2
PFO3OA
<2
<2
<2
<2
<2
<2
<2
<2 UJ
<2
<2
<2
<2
<2 UJ
<2
PFO4DA
<2
<2
<2
<2
<2
<2
<2
<2 UJ
<2
<2
<2
<2
<2 UJ
<2
PFO5DA
<5
<5
<5
<5
<5
<5
<5
<5 UJ
<5
<5
<5
<5
<5 UJ
<5
PMPA
<2
<2
<2
<2
<2
<2
<2
<2 UJ
<2
<2
<2
<2
<2 UJ
<2
PEPA
<2
<2
<2
<2
<2
<2
<2
<2 UJ
<2
<2
<2
<2
<2 UJ
<2
PS Acid
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
Hydro -PS Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA-G
<2
<2
<2
<2
<2
<2
<2
<2 UJ
<2
<2
<2
<2
<2 UJ
<2
Perfluoroheptanoic Acid
1 <2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Total CO Attachment C PFAS (ng/L)
I ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
TR1043 Page 13 of 16 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.2
ATTACHMENT C PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1123736
1150857
1165328
1180476
1181854
1195893
1202997
1271871
1008066
1048497
1051998
1066043
1080848
1080848
Sample Purpose
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
DUP
Sample Date
07-Feb-24
07-Feb-24
07-Feb-24
07-Feb-24
07-Feb-24
07-Feb-24
07-Feb-24
07-Feb-24
08-Feb-24
08-Feb-24
08-Feb-24
08-Feb-24
08-Feb-24
08-Feb-24
Sample Delivery Group
410-160110-1
410-160110-2
410-160110-2
410-160110-2
410-160110-2
410-160110-2
410-160110-2
410-160110-1
410-160303-1
410-160303-1
410-160435-1
410-160435-1
410-160303-1
410-160303-1
Lab Sample ID
410-160110-20
410-160110-24
410-160110-29
410-160110-22
410-160110-26
410-160110-25
410-160110-27
410-160110-19
410-160303-1
410-160303-4
410-160435-1
410-160435-2
410-160303-5
410-160303-6
CO Attachment C PFAS (ng/L)
Hfpo Dimer Acid
<3
<3
<3
<3
<3
<3
<3
10
<3
<3
<3
<3
<3
<3
PFMOAA
<2
<2
<2
<2
<2
<2
<2
510
<2
<2
<2
<2
<2 Ri
<2
PFO2HxA
<2
<2
<2
<2
<2
<2
<2
120
<2
<2
<2
<2
<2
<2
PFO3OA
<2
<2
<2
<2
<2
<2
<2
29
<2
<2
<2
<2
<2
<2
PFO4DA
<2
<2
<2
<2
<2
<2
<2
3.9
<2
<2
<2
<2
<2
<2
PFO5DA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
PMPA
<2
<2
<2
<2
<2
<2
<2
17
<2
<2
<2
<2
<2
<2
PEPA
<2
<2
<2
<2
<2
<2
<2
3.3
<2
<2
<2
<2
<2
<2
PS Acid
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
Hydro -PS Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA-G
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Perfluoroheptanoic Acid
1 <2
<2
<2
<2
<2
<2
<2
3.3
<2
<2
<2
<2
<2
<2
Total CO Attachment C PFAS (ng/L)
ND
ND
ND
ND
ND
ND
ND
697
ND
ND
ND
ND
ND
ND
TR1043 Page 14 of 16 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.2
ATTACHMENT C PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1110827
1110910
1183363
1016745
1019146
1086541
1090267
1120669
1164069
1168922
Sample Purpose
FS
FS
FS
FS
FS
FS
FS
FS
FS
FS
Sample Date
08-Feb-24
08-Feb-24
08-Feb-24
09-Feb-24
09-Feb-24
09-Feb-24
09-Feb-24
09-Feb-24
09-Feb-24
09-Feb-24
Sample Delivery Group
410-160303-1
410-160303-1
410-160435-1
410-160435-1
410-160435-1
410-160435-1
410-160435-1
410-160435-1
410-160435-1
410-160435-1
Lab Sample ID
410-160303-2
410-160303-3
410-160435-3
410-160435-6
410-160435-8
410-160435-12
410-160435-7
410-160435-10
410-160435-11
410-160435-5
CO Attachment C PFAS (ng/L)
Hfpo Dimer Acid
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFMOAA
<2
14
<2
3.2
<2
14
2.7
<2
74
<2
PFO2HxA
<2
4.5
<2
<2
<2
<2
<2
<2
18
<2
PFO3OA
<2
<2
<2
<2
<2
<2
<2
<2
2.2
<2
PFO4DA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFO5DA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
PMPA
<2
2.3
<2
<2
<2
<2
<2
<2
<2
<2
PEPA
<2
<2
<2
<2
<2
<2
4.4
<2
<2
<2
PS Acid
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
Hydro -PS Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA-G
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Perfluoroheptanoic Acid
<2
<2
<2
2.3
<2
<2
<2
<2
<2
<2
Total CO Attachment C PFAS (ng/L)
ND
21
ND
6
ND
14
7
ND
94
ND
TR1043 Page 15 of 16 March 2024

Geosyntec Consultants of NC, P.C.
Regulatory Location ID
1201382
1210876
Sample Purpose
FS
FS
Sample Date
09-Feb-24
09-Feb-24
Sample Delivery Group
410-160435-1
410-160435-1
Lab Sample ID
410-160435-9
410-160435-4
CO Attachment C PFAS (ng/L)
Hfpo Dimer Acid
<3
<3
PFMOAA
<2
<2
PF02HxA
<2
<2
PF030A
<2
<2
PF04DA
<2
<2
PF05DA
<5
<5
PMPA
<2
<2
PEPA
<2
<2
PS Acid
<5
<5
Hydro -PS Acid
<2
<2
PFECA-G
<2
<2
Perfluoroheptanoic Acid
<2
<2
Total CO Attachment C PFAS (ng/L)
ND
ND
TABLE A.2
ATTACHMENT C PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Notes:
CO - Consent Order
DUP - field duplicate
FS - field sample
HFPO Dimer Acid - Hexafluoropropylene oxide dimer acid
Hydro -PS Acid - Ethanesulfonic acid, 2-[l-[difluoro(1,2,2,2-
tetrafluoroethoxy)methyl]-1,2,2,2-tetrafluoroethoxy]-1,1,2,2
-tetrafluoro-
J - associated result is estimated
ng/L - nanograms per liter
ND - Attachment C PFAS not detected above associated reporting limits
PEPA - Perfluoro-2-ethoxypropionic acid
PFAS - per- and polyfluoroalkyl substance
PFECA-G - Perfluoro-4-isopropoxybutanoic acid
PFMOAA - Perfluoro-2-methoxyacetic acid
PF02HxA - Perfluoro-3,5-dioxahexanoic acid
PF03DA - Perfluoro-3,5,7-trioxaoctanoic acid
PF04DA - Perfluoro-3,5,7,9-tetraoxadecanoic acid
PF05DA - Perfluoro-3,5,7,9,11-pentaoxadodecanoic acid
PS Acid - Ethanesulfonic acid, 2-
methyl] - 1,2,2,2-tetrafluoroethoxy]- 1, 1,2,2-tetrafluoro-
R - result does not meet acceptance criteria
UJ - analyte not detected and reporting limit is uncertain
< - analyte not detected above associated reporting limit
1. This R-qualified sample will be re -analyzed for PFMOAA. The reanalysis results will be presented in the next monthly report.
TR1043 Page 16 of 16 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.3
OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1016611
1075312
1088211
1209035
1104154
1115870
1139113
1185696
1154543
1167076
1167076
1172123
Sample Purpose
FS
ITS
FS
ITS
FS
ITS
FS
ITS
FS
ITS
DUP
ITS
Sample Date
17-Jan-24
17-Jan-24
17-Jan-24
17-Jan-24
17-Jan-24
17-Jan-24
17-Jan-24
17-Jan-24
17-Jan-24
17-Jan-24
17-Jan-24
17-Jan-24
Sample Delivery Group
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
Lab Sample ID
320-109018-8
320-109018-6
320-109018-16
320-109018-2
320-109018-12
320-109018-3
320-109018-5
320-109018-13
320-109018-14
320-109018-9
320-109018-10
320-109018-15
Table 3+ PFAS (ng/L)
R-PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Hydrolyzed PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-PSDCA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NVHOS
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
EVE Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Hydro -EVE Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-EVE
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PES
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA B
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
537 Mod PFAS (ng/L)
PFBA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
PFPeA
<2
<2
<2
<2
<2
<2
<2
3.2
<2
<2
<2
<2
PFHxA
<2
<2
<2
<2
<2
<2
<2
2.4
<2
<2
<2
<2
PFOA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFNA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFUnDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTriDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTeDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFODA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFBS
<2
<2
<2
<2
<2
2.5
<2
2.5
<2
<2
<2
<2
PFPeS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHpS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOS
<2
<2
<2
<2
<2
8
<2
<2
<2
<2
<2
5 J
PFNS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOSA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NMePFOSA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NMePFOSAE
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
NMePFOSAA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
NEtPFOSA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NEtPFOSAE
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NEtPFOSAA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
4:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
6:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
8:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
10:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
DONA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Major
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Minor
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
TR1043 Page 1 of 17 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.3
OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1175525
1184643
1213140
1036893
1098310
1099558
1109808
1138013
1169360
1151744
1213305
1213305
Sample Purpose
FS
ITS
FS
ITS
FS
ITS
FS
ITS
FS
ITS
FS
DUP
Sample Date
17-Jan-24
17-Jan-24
17-Jan-24
18-Jan-24
18-Jan-24
18-Jan-24
18-Jan-24
18-Jan-24
18-Jan-24
18-Jan-24
18-Jan-24
18-Jan-24
Sample Delivery Group
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
Lab Sample ID
320-109018-1
320-109018-7
320-109018-4
320-109018-27
320-109018-28
320-109018-29
320-109018-26
320-109018-25
320-109018-23
320-109018-22
320-109018-18
320-109018-19
Table 3+ PFAS (ng/L)
R-PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Hydrolyzed PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-PSDCA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NVHOS
<3
<3
<3
<3
<3
<3
<3
<3
<3
7.5
<3
<3
EVE Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Hydro -EVE Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-EVE
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PES
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA B
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
537 Mod PFAS (ng/L)
PFBA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
PFPeA
<2
<2
<2
<2
<2
<2
<2
<2
<2
3
<2
<2
PFHxA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFNA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFUnDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTriDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTeDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFODA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFBS
<2
<2
<2
2
2
2.1
<2
<2
<2
2.1
<2
<2
PFPeS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxS
<2
<2
<2
<2
2.1
<2
<2
<2
<2
2.1
<2
<2
PFHpS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOS
2.4 J
<2
<2
2.8
<2
<2
3.9
5.8
7.3
7.4
<2
6.6 J
PFNS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOSA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NMePFOSA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NMePFOSAE
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
NMePFOSAA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
NEtPFOSA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NEtPFOSAE
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NEtPFOSAA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
4:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
6:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
8:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
10:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
DONA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Major
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Minor
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
TR1043 Page 2 of 17 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.3
OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1184968
1196187
1202626
1203647
1210679
1210611
1066037
1153518
1171552
1172458
1176702
1185925
Sample Purpose
FS
ITS
FS
ITS
FS
ITS
FS
ITS
FS
ITS
FS
ITS
Sample Date
18-Jan-24
18-Jan-24
18-Jan-24
18-Jan-24
19-Jan-24
19-Jan-24
19-Jan-24
19-Jan-24
19-Jan-24
19-Jan-24
19-Jan-24
19-Jan-24
Sample Delivery Group
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
320-109018-1
Lab Sample ID
320-109018-30
320-109018-24
320-109018-21
320-109018-17
320-109018-34
320-109018-38
320-109018-35
320-109018-37
320-109018-40
320-109018-39
320-109018-36
320-109018-31
Table 3+ PFAS (ng/L)
R-PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Hydrolyzed PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-PSDCA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NVHOS
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
EVE Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Hydro -EVE Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-EVE
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PES
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA B
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
537 Mod PFAS (ng/L)
PFBA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
PFPeA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
2.6
PFHxA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFNA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFUnDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTriDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTeDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFODA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFBS
4
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
14
PFPeS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxS
2.5
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
2.7
PFHpS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOS
<2
5.1
7
<2
<2
<2
3.5
<2
<2
<2
<2
4.9
PFNS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOSA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NMePFOSA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NMePFOSAE
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
NMePFOSAA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
NEtPFOSA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NEtPFOSAE
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NEtPFOSAA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
4:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
6:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
8:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
10:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
DONA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Major
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Minor
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
TR1043 Page 3 of 17 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.3
OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1187554
1270027
1010424
1213039
1032476
1087639
1102673
1213406
1154000
1153483
1210326
1173166
Sample Purpose
FS
ITS
FS
ITS
FS
ITS
FS
ITS
FS
ITS
FS
ITS
Sample Date
19-Jan-24
19-Jan-24
22-Jan-24
22-Jan-24
22-Jan-24
22-Jan-24
22-Jan-24
22-Jan-24
22-Jan-24
22-Jan-24
22-Jan-24
22-Jan-24
Sample Delivery Group
320-109018-1
320-109018-1
410-158389-1
410-158389-1
410-158389-1
410-158389-2
410-158389-2
410-158389-2
410-158389-1
410-158389-2
410-158389-1
410-158389-1
Lab Sample ID
320-109018-32
320-109018-33
410-158389-17
410-158389-1
410-158389-4
410-158389-24
410-158389-23
410-158389-22
410-158389-19
410-158389-21
410-158389-3
410-158389-2
Table 3+ PFAS (ng/L)
R-PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Hydrolyzed PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-PSDCA
<3
<3
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NVHOS
<3
<3
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
EVE Acid
<2
<2
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
Hydro -EVE Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-EVE
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PES
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA B
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
537 Mod PFAS (ng/L)
PFBA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
PFPeA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOA
<2
<2
<2
<2
2.2
<2
<2
<2
<2
<2
<2
<2
PFNA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFUnDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTriDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTeDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxDA
<2
<2
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFODA
<2
<2
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFBS
<2
4
<2
<2
<2
2.1
<2
<2
3.6
<2
<2
<2
PFPeS
<2
<2
<2
<2
<2
2.1
<2
<2
<2
<2
<2
<2
PFHxS
<2
2.9
<2
<2
<2
9.2
<2
<2
<2
<2
<2
<2
PFHpS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOS
<2
<2
<2
<2
<2
2.1 J
<2
<2
<2
<2
<2
<2
PFNS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDS
<2
<2
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFOSA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NMePFOSA
<2
<2
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3 UJ
NMePFOSAE
<4
<4
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NMePFOSAA
<5
<5
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NEtPFOSA
<2
<2
<5
<5
<5 UJ
<5
<5
<5
<5
<5
<5
<5 UJ
NEtPFOSAE
<2
<2
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NEtPFOSAA
<5
<5
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
4:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
6:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
8:2 FTS
<2
<2
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
10:2 FTS
<2
<2
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
DONA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Major
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Minor
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
TR1043 Page 4 of 17 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.3
OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1174844
1183744
1195363
1195363
1198522
1213353
1208701
1213422
1213422
1213432
1210570
1119160
Sample Purpose
FS
ITS
FS
DUP
FS
ITS
FS
ITS
DUP
ITS
FS
ITS
Sample Date
22-Jan-24
22-Jan-24
22-Jan-24
22-Jan-24
22-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
Sample Delivery Group
410-158389-1
410-158389-1
410-158389-1
410-158389-1
410-158389-1
410-158389-1
410-158389-2
410-158389-1
410-158389-1
410-158389-1
410-158389-1
410-158389-2
Lab Sample ID
410-158389-18
410-158389-16
410-158389-10
410-158389-11
410-158389-20
410-158389-5
410-158389-30
410-158389-13
410-158389-14
410-158389-6
410-158389-7
410-158389-26
Table 3+ PFAS (ng/L)
R-PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Hydrolyzed PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-PSDCA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NVHOS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
EVE Acid
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
Hydro -EVE Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-EVE
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PES
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA B
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
537 Mod PFAS (ng/L)
PFBA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
PFPeA
<2
2.1
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxA
<2
2.6
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFNA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFUnDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTriDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTeDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxDA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFODA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFBS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFPeS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHpS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFNS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDS
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFOSA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NMePFOSA
<3
<3 UJ
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NMePFOSAE
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NMePFOSAA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NEtPFOSA
<5
<5 UJ
<5 UJ
<5
<5
<5
<5
<5
<5
<5
<5
<5
NEtPFOSAE
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NEtPFOSAA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
4:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
6:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
8:2 FTS
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
10:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
DONA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Major
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Minor
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
TR1043 Page 5 of 17 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.3
OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1210373
1138691
1142275
1173647
1190143
1210371
1210369
1167463
1170165
1184679
1045860
1058410
Sample Purpose
FS
ITS
FS
ITS
FS
ITS
FS
ITS
FS
ITS
FS
ITS
Sample Date
23-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
23-Jan-24
24-Jan-24
24-Jan-24
Sample Delivery Group
410-158389-2
410-158389-2
410-158389-2
410-158389-2
410-158389-2
410-158389-2
410-158389-2
410-158389-2
410-158389-1
410-158389-1
410-158516-1
410-158516-1
Lab Sample ID
410-158389-28
410-158389-32
410-158389-27
410-158389-25
410-158389-29
410-158389-31
410-158389-33
410-158389-34
410-158389-8
410-158389-9
410-158516-2
410-158516-10
Table 3+ PFAS (ng/L)
R-PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Hydrolyzed PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-PSDCA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NVHOS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
EVE Acid
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
Hydro -EVE Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-EVE
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PES
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA B
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
537 Mod PFAS (ng/L)
PFBA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
PFPeA
<2
<2
<2
<2
<2
<2
<2
<2
<2
4.6
<2
<2
PFHxA
<2
<2
<2
<2
<2
<2
<2
<2
<2
4.8
<2
<2
PFOA
<2
<2
<2
<2
<2
<2
<2
<2
<2
4.3
<2
<2
PFNA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFUnDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTriDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTeDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxDA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFODA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFBS
<2
<2
<2
<2
<2
<2
<2
<2
<2
8.4
<2
<2
PFPeS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHpS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOS
<2
<2
<2
2.6 J
<2
<2
<2
<2
<2
7.4
<2
<2
PFNS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDS
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFOSA
<2
<2
<2
3.8
<2
<2
<2
<2
<2
<2
<2
<2
NMePFOSA
<3
<3
<3
<3
<3
<3
<3
<3 UJ
<3
<3 UJ
<3 UJ
<3
NMePFOSAE
<3
<3
<3
<3
<3
<3
<3
<3 UJ
<3
<3
<3
<3
NMePFOSAA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NEtPFOSA
<5
<5
<5
<5
<5
<5
<5
<5 UJ
<5
<5 UJ
<5 UJ
<5
NEtPFOSAE
<3
<3
<3
<3
<3
<3
<3
<3 UJ
<3
<3 UJ
<3
<3
NEtPFOSAA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
4:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
6:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
8:2 FTS
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
10:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
DONA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Major
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Minor
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
TR1043 Page 6 of 17 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.3
OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1058410
1062171
1105439
1073234
1137580
1151200
1161302
1179828
1184353
1196610
1200673
1207906
Sample Purpose
DUP
ITS
FS
ITS
FS
ITS
FS
ITS
FS
ITS
FS
ITS
Sample Date
24-Jan-24
24-Jan-24
24-Jan-24
24-Jan-24
24-Jan-24
24-Jan-24
24-Jan-24
24-Jan-24
24-Jan-24
24-Jan-24
24-Jan-24
24-Jan-24
Sample Delivery Group
410-158516-1
410-158516-1
410-158516-1
410-158516-1
410-158516-1
410-158516-1
410-158516-1
410-158516-1
410-158516-1
410-158516-1
410-158516-1
410-158516-1
Lab Sample ID
410-158516-11
410-158516-3
410-158516-6
410-158516-9
410-158516-5
410-158516-17
410-158516-1
410-158516-8
410-158516-7
410-158516-16
410-158516-4
410-158516-15
Table 3+ PFAS (ng/L)
R-PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Hydrolyzed PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-PSDCA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NVHOS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
EVE Acid
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
Hydro -EVE Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-EVE
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PES
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA B
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
537 Mod PFAS (ng/L)
PFBA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
PFPeA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFNA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFUnDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTriDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTeDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxDA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFODA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFBS
<2
<2
<2
<2
<2
<2
2.5
<2
<2
<2
<2
<2
PFPeS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHpS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOS
<2
<2
<2
<2
<2
<2
3.1
<2
<2
<2
<2
<2
PFNS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDS
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFOSA
<2
<2
<2
<2
<2
5.7
<2
<2
3.7
<2
<2
<2
NMePFOSA
<3
<3 UJ
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NMePFOSAE
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NMePFOSAA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NEtPFOSA
<5
<5 UJ
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
NEtPFOSAE
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NEtPFOSAA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
4:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
6:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
8:2 FTS
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
10:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
DONA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Major
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Minor
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
TR1043 Page 7 of 17 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.3
OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1200512
1200512
1213226
1010748
1023205
1060980
1072309
1213230
1208275
1116026
1124701
1133389
Sample Purpose
FS
ITS
FS
ITS
FS
ITS
FS
ITS
FS
ITS
FS
ITS
Sample Date
24-Jan-24
24-Jan-24
25-Jan-24
25-Jan-24
25-Jan-24
25-Jan-24
25-Jan-24
25-Jan-24
25-Jan-24
25-Jan-24
25-Jan-24
25-Jan-24
Sample Delivery Group
410-158516-1
410-158516-1
410-158720-1
410-158810-1
410-158810-1
410-158720-1
410-158720-1
410-158720-1
410-158810-1
410-158810-1
410-158810-1
410-158810-1
Lab Sample ID
410-158516-13
410-158516-14
410-158720-6
410-158810-15
410-158810-14
410-158720-2
410-158720-3
410-158720-5
410-158810-1
410-158810-16
410-158810-3
410-158810-2
Table 3+ PFAS (ng/L)
R-PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Hydrolyzed PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-PSDCA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NVHOS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
EVE Acid
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
Hydro -EVE Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-EVE
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PES
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA B
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
537 Mod PFAS (ng/L)
PFBA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
PFPeA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOA
<2
<2
<2
<2
<2
<2
<2
<2
<2
2.3
<2
<2
PFNA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFUnDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTriDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTeDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxDA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFODA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFBS
<2
<2
<2
<2
<2
<2
<2
<2
<2
2.6
<2
<2
PFPeS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHpS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOS
<2
<2
<2
<2
<2
<2
<2
<2
<2
9.1
<2
<2
PFNS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDS
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFOSA
<2
<2
2.1
<2
<2
2.3
<2
<2
<2
<2
<2
<2
NMePFOSA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NMePFOSAE
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NMePFOSAA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NEtPFOSA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
NEtPFOSAE
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NEtPFOSAA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
4:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
6:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
8:2 FTS
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
10:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
DONA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Major
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Minor
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
TR1043 Page 8 of 17 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.3
OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1153283
1156459
1182275
1207015
1186917
1003893
1213310
1213536
1213536
1128969
1131641
1160664
1163434
Sample Purpose
FS
FS
ITS
FS
ITS
FS
ITS
FS
DUP
FS
ITS
FS
FS
Sample Date
25-Jan-24
25-Jan-24
25-Jan-24
25-Jan-24
25-Jan-24
26-Jan-24
26-Jan-24
26-Jan-24
26-Jan-24
26-Jan-24
26-Jan-24
26-Jan-24
26-Jan-24
Sample Delivery Group
410-158720-1
410-158810-1
410-158810-1
410-158720-1
410-158810-1
410-158810-1
410-158810-1
410-158810-1
410-158810-2
410-158810-1
410-158810-1
410-158810-1
410-158810-1
Lab Sample ID
410-158720-1
410-158810-17
410-158810-13
410-158720-4
410-158810-12
410-158810-11
410-158810-6
410-158810-20
410-158810-21
410-158810-7
410-158810-10
410-158810-4
410-158810-8
Table 3+ PFAS (ng/L)
R-PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Hydrolyzed PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-PSDCA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NVHOS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
EVE Acid
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
Hydro -EVE Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-EVE
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PES
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA B
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
537 Mod PFAS (ng/L)
PFBA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
PFPeA
<2
<2
<2
<2
3.1
<2
<2
<2
<2
<2
<2
<2
6.9
PFHxA
<2
<2
<2
<2
3.1
<2
<2
<2
<2
<2
<2
<2
7
PFOA
<2
<2
<2
3.9
3.2
<2
<2
<2
<2
<2
<2
<2
12
PFNA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFUnDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTriDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTeDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxDA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFODA
<3
<3
<3
<3
<3
<3
<3
<3 UJ
<3
<3
<3
<3
<3
PFBS
<2
<2
<2
<2
3.6
<2
<2
<2
<2
<2
<2
<2
2.4
PFPeS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxS
<2
<2
<2
<2
2.5
<2
<2
<2
<2
<2
<2
<2
4.2
PFHpS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOS
2.2
<2
<2
<2
16
<2
<2
<2
<2
<2
<2
<2
4 J
PFNS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDS
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFOSA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NMePFOSA
<3 UJ
<3
<3
<3
<3
<3
<3
<3
<3 UJ
<3
<3
<3
<3 UJ
NMePFOSAE
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NMePFOSAA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NEtPFOSA
<5 UJ
<5
<5
<5
<5
<5
<5 UJ
<5 UJ
<5 UJ
<5
<5
<5
<5 UJ
NEtPFOSAE
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NEtPFOSAA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
4:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
6:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
8:2 FTS
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
10:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
DONA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Major
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Minor
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
TR1043 Page 9 of 17 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.3
OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1166441
1178926
1200843
1210685
1210677
1210679
1210687
1210689
1210681
1210683
1007135
1027280
1036834
Sample Purpose
FS
FS
FS
FS
FS
FS
FS
ITS
FS
ITS
FS
ITS
FS
Sample Date
26-Jan-24
26-Jan-24
26-Jan-24
29-Jan-24
29-Jan-24
29-Jan-24
29-Jan-24
29-Jan-24
29-Jan-24
29-Jan-24
29-Jan-24
29-Jan-24
29-Jan-24
Sample Delivery Group
410-158810-1
410-158810-1
410-158810-1
320-109207-1
320-109207-1
320-109207-1
320-109207-1
320-109207-1
320-109207-1
320-109207-1
320-109207-1
320-109207-1
320-109207-1
Lab Sample ID
410-158810-9
410-158810-5
410-158810-18
320-109207-6
320-109207-12
320-109207-13
320-109207-5
320-109207-2
320-109207-14
320-109207-16
320-109207-17
320-109207-11
320-109207-7
Table 3+ PFAS (ng/L)
R-PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Hydrolyzed PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-PSDCA
<2
<2
<2
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NVHOS
<2
<2
<2
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
EVE Acid
<5
<5
<5
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Hydro -EVE Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-EVE
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PES
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA B
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
537 Mod PFAS (ng/L)
PFBA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
PFPeA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFNA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFUnDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTriDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTeDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxDA
<3
<3
<3
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFODA
<3
<3
<3
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFBS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFPeS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHpS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFNS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDS
<3
<3
<3
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOSA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NMePFOSA
<3
<3
<3
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NMePFOSAE
<3
<3
<3
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
NMePFOSAA
<2
<2
<2
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
NEtPFOSA
<5
<5
<5
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NEtPFOSAE
<3
<3
<3
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NEtPFOSAA
<3
<3
<3
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
4:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
6:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
8:2 FTS
<3
<3
<3
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
10:2 FTS
<5
<5
<5
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
DONA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Major
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Minor
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
TR1043 Page 10 of 17 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.3
OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1060324
1108492
1163975
1210613
1175993
1199700
1199700
1009359
1032184
1213132
1053394
1210148
1209945
Sample Purpose
FS
FS
ITS
FS
ITS
FS
DUP
FS
ITS
FS
ITS
FS
ITS
Sample Date
29-Jan-24
29-Jan-24
29-Jan-24
29-Jan-24
29-Jan-24
29-Jan-24
29-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
Sample Delivery Group
320-109207-1
320-109207-1
320-109207-1
320-109207-1
320-109207-1
320-109207-1
320-109207-1
320-109254-1
320-109254-1
320-109254-1
320-109254-1
320-109254-1
320-109254-1
Lab Sample ID
320-109207-1
320-109207-15
320-109207-18
320-109207-4
320-109207-3
320-109207-8
320-109207-9
320-109254-12
320-109254-16
320-109254-18
320-109254-7
320-109254-10
320-109254-14
Table 3+ PFAS (ng/L)
R-PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Hydrolyzed PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-PSDCA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NVHOS
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
EVE Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Hydro -EVE Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-EVE
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PES
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA B
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
537 Mod PFAS (ng/L)
PFBA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
PFPeA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFNA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFUnDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTriDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTeDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFODA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFBS
<2
<2
<2
<2
2.4
<2
<2
<2
<2
<2
<2
<2
<2
PFPeS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHpS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFNS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOSA
<2
<2
<2
3.2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NMePFOSA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NMePFOSAE
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
NMePFOSAA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
NEtPFOSA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NEtPFOSAE
2.7
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NEtPFOSAA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
4:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
6:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
8:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
10:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
DONA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Major
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Minor
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
TR1043 Page 11 of 17 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.3
OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1071681
1087488
1210388
1101195
1112061
1112061
1112763
1132425
1213198
1269859
1197261
1203360
1046412
Sample Purpose
FS
FS
ITS
FS
ITS
DUP
FS
FS
ITS
FS
ITS
FS
ITS
Sample Date
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
30-Jan-24
05-Feb-24
Sample Delivery Group
320-109254-1
320-109254-1
320-109254-1
320-109254-1
320-109254-1
320-109254-1
320-109254-1
320-109254-1
320-109254-1
320-109254-1
320-109254-1
320-109254-1
410-159829-1
Lab Sample ID
320-109254-5
320-109254-8
320-109254-15
320-109254-19
320-109254-1
320-109254-2
320-109254-6
320-109254-4
320-109254-13
320-109254-9
320-109254-11
320-109254-17
410-159829-15
Table 3+ PFAS (ng/L)
R-PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Hydrolyzed PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-PSDCA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<2
NVHOS
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<2
EVE Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<5
Hydro -EVE Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-EVE
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PES
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA B
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
537 Mod PFAS (ng/L)
PFBA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
PFPeA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFNA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFUnDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTriDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTeDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<3
PFODA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<3
PFBS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFPeS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHpS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFNS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<3
PFOSA
<2
<2
<2
<2
<2
<2
<2
<2
5.3
<2
<2
<2
<2
NMePFOSA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<3
NMePFOSAE
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<4
<3
NMePFOSAA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<2
NEtPFOSA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<5
NEtPFOSAE
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<3
NEtPFOSAA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<3
4:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
6:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
8:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<3
10:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<5
DONA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Major
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Minor
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
TR1043 Page 12 of 17 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.3
OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1047765
1210643
1070439
1083256
1086328
1091360
1122982
1123336
1126041
1157646
1160239
1162030
1173383
Sample Purpose
FS
FS
FS
FS
FS
FS
FS
ITS
FS
ITS
FS
ITS
FS
Sample Date
05-Feb-24
05-Feb-24
05-Feb-24
05-Feb-24
05-Feb-24
05-Feb-24
05-Feb-24
05-Feb-24
05-Feb-24
05-Feb-24
05-Feb-24
05-Feb-24
05-Feb-24
Sample Delivery Group
410-159829-1
410-159829-1
410-159829-1
410-159829-1
410-159829-1
410-159829-1
410-159829-1
410-159829-1
410-159829-1
410-159829-1
410-159829-1
410-159829-1
410-159829-1
Lab Sample ID
410-159829-3
410-159829-12
410-159829-7
410-159829-8
410-159829-14
410-159829-9
410-159829-10
410-159829-1
410-159829-6
410-159829-5
410-159829-11
410-159829-2
410-159829-13
Table 3+ PFAS (ng/L)
R-PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Hydrolyzed PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-PSDCA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NVHOS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
EVE Acid
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
Hydro -EVE Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-EVE
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PES
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA B
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
537 Mod PFAS (ng/L)
PFBA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
PFPeA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFNA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFUnDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTriDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTeDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxDA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFODA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFBS
<2
2.2
<2
4.7
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFPeS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHpS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFNS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDS
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFOSA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NMePFOSA
<3
<3
<3
<3
<3
<3
<3
<3
<3 UJ
<3
<3
<3
<3
NMePFOSAE
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NMePFOSAA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NEtPFOSA
<5
<5
<5
<5
<5
<5
<5
<5
<5 UJ
<5
<5
<5
<5
NEtPFOSAE
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NEtPFOSAA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
4:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
6:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
8:2 FTS
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
10:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
DONA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Major
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Minor
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
TR1043 Page 13 of 17 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.3
OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1185905
1001021
1051524
1060835
1083625
1108204
1108460
1126391
1158815
1147726
1181882
1161850
1172107
Sample Purpose
FS
FS
FS
FS
FS
FS
FS
ITS
FS
ITS
FS
ITS
FS
Sample Date
05-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
Sample Delivery Group
410-159829-1
410-160110-1
410-160110-1
410-160110-1
410-160110-1
410-160110-1
410-160110-1
410-160110-1
410-160110-1
410-160110-1
410-160110-1
410-160110-1
410-160110-1
Lab Sample ID
410-159829-4
410-160110-9
410-160110-8
410-160110-15
410-160110-17
410-160110-6
410-160110-16
410-160110-2
410-160110-12
410-160110-13
410-160110-10
410-160110-1
410-160110-14
Table 3+ PFAS (ng/L)
R-PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Hydrolyzed PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-PSDCA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NVHOS
<2
<2
5.8
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
EVE Acid
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
Hydro -EVE Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-EVE
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PES
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA B
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
537 Mod PFAS (ng/L)
PFBA
<5
<5
6.2
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
PFPeA
<2
<2
8.7
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxA
<2
<2
6.9
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOA
<2
<2
5.2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFNA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFUnDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTriDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTeDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxDA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFODA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFBS
<2
<2
6.9
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFPeS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHpS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOS
<2
4
4.5
2.2 J
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFNS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDS
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFOSA
<2
<2
<2
<2
<2
3.6
<2
2.8
<2
4.8
<2
<2
<2
NMePFOSA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NMePFOSAE
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NMePFOSAA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NEtPFOSA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
NEtPFOSAE
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NEtPFOSAA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
4:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
6:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
8:2 FTS
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
10:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
DONA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Major
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Minor
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
TR1043 Page 14 of 17 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.3
OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1172563
1184349
1184297
1199374
1199374
1017946
1054690
1118249
1123736
1150857
1165328
1180476
1181854
Sample Purpose
FS
FS
FS
FS
DUP
FS
FS
FS
FS
ITS
FS
ITS
FS
Sample Date
06-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
06-Feb-24
07-Feb-24
07-Feb-24
07-Feb-24
07-Feb-24
07-Feb-24
07-Feb-24
07-Feb-24
07-Feb-24
Sample Delivery Group
410-160110-1
410-160110-1
410-160110-1
410-160110-1
410-160110-1
410-160110-2
410-160110-2
410-160110-2
410-160110-1
410-160110-2
410-160110-2
410-160110-2
410-160110-2
Lab Sample ID
410-160110-7
410-160110-11
410-160110-18
410-160110-3
410-160110-4
410-160110-23
410-160110-21
410-160110-28
410-160110-20
410-160110-24
410-160110-29
410-160110-22
410-160110-26
Table 3+ PFAS (ng/L)
R-PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Hydrolyzed PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-PSDCA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NVHOS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
EVE Acid
<5
<5
<5 UJ
<5
<5
<5
<5 UJ
<5
<5
<5
<5
<5
<5
Hydro -EVE Acid
<2
<2
<2 UJ
<2
<2
<2
<2 UJ
<2
<2
<2
<2
<2
<2
R-EVE
<2
<2
<2 UJ
<2
<2
<2
<2 UJ
<2
<2
<2
<2
<2
<2
PES
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA B
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
537 Mod PFAS (ng/L)
PFBA
<5
<5
<5 UJ
<5
<5
<5
<5 UJ
<5
<5
<5
<5
<5
<5
PFPeA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFNA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFUnDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTriDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTeDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxDA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFODA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFBS
<2
<2
<2
2.8
2.5 J
<2
<2
<2
<2
<2
<2
<2
<2
PFPeS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHpS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOS
2.5 J
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFNS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDS
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFOSA
<2
<2
<2
<2
<2
<2
<2
<2
<2
2
<2
<2
11
NMePFOSA
<3
<3
<3
<3 UJ
<3
<3
<3
<3
<3
<3
<3
<3
<3
NMePFOSAE
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NMePFOSAA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NEtPFOSA
<5
<5
<5
<5 R
<5
<5 UJ
<5
<5
<5
<5
<5
<5
<5
NEtPFOSAE
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NEtPFOSAA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
4:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
6:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
8:2 FTS
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
10:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
DONA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Major
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Minor
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
TR1043 Page 15 of 17 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.3
OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1271871
1195893
1202997
1008066
1048497
1051998
1066043
1080848
1080848
1110827
1110910
1183363
1019146
Sample Purpose
FS
FS
ITS
FS
ITS
FS
ITS
FS
DUP
FS
ITS
FS
FS
Sample Date
07-Feb-24
07-Feb-24
07-Feb-24
08-Feb-24
08-Feb-24
08-Feb-24
08-Feb-24
08-Feb-24
08-Feb-24
08-Feb-24
08-Feb-24
08-Feb-24
09-Feb-24
Sample Delivery Group
410-160110-1
410-160110-2
410-160110-2
410-160303-1
410-160303-1
410-160435-1
410-160435-1
410-160303-1
410-160303-1
410-160303-1
410-160303-1
410-160435-1
410-160435-1
Lab Sample ID
410-160110-19
410-160110-25
410-160110-27
410-160303-1
410-160303-4
410-160435-1
410-160435-2
410-160303-5
410-160303-6
410-160303-2
410-160303-3
410-160435-3
410-160435-8
Table 3+ PFAS (ng/L)
R-PSDA
6.6 J
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
Hydrolyzed PSDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-PSDCA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NVHOS
9.9
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
EVE Acid
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
Hydro -EVE Acid
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
R-EVE
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PES
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFECA B
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
537 Mod PFAS (ng/L)
PFBA
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
PFPeA
5.6
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxA
4.3
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOA
5
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFNA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFUnDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTriDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFTeDA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxDA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFODA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFBS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFPeS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHxS
6.8
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFHpS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFOS
3.7
<2
<2
<2
2.3
<2
<2
<2
<2
<2
<2
<2
<2
PFNS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDS
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
PFOSA
3.7
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NMePFOSA
<3
<3
<3 UJ
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NMePFOSAE
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NMePFOSAA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
NEtPFOSA
<5
<5
<5 UJ
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
NEtPFOSAE
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
NEtPFOSAA
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
4:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
6:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
8:2 FTS
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
<3
10:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
<5
DONA
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Major
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Minor
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
TR1043 Page 16 of 17 March 2024

TABLE A.3
Geosyntec Consultants of NC, P.C.
OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Regulatory Location ID
1016745
1210876
1086541
1090267
1120669
1164069
1168922
1201382
Sample Purpose
ITS
FS
ITS
FS
ITS
FS
ITS
FS
Sample Date
09-Feb-24
09-Feb-24
09-Feb-24
09-Feb-24
09-Feb-24
09-Feb-24
09-Feb-24
09-Feb-24
Sample Delivery Group
410-160435-1
410-160435-1
410-160435-1
410-160435-1
410-160435-1
410-160435-1
410-160435-1
410-160435-1
Lab Sample ID
410-160435-6
410-160435-4
410-160435-12
410-160435-7
410-160435-10
410-160435-11
410-160435-5
410-160435-9
Table 3+ PFAS (ng/L)
R-PSDA
<2
<2
<2
2.5 J
<2
<2
<2
<2
Hydrolyzed PSDA
<2
<2
<2
<2
<2
<2
<2
<2
R-PSDCA
<2
<2
<2
<2
<2
<2
<2
<2
NVHOS
<2
<2
<2
<2
<2
<2
<2
<2
EVE Acid
<5
<5
<5
<5
<5
<5
<5
<5
Hydro -EVE Acid
<2
<2
<2
<2
<2
<2
<2
<2
R-EVE
<2
<2
<2
<2
<2
<2
<2
<2
PES
<2
<2
<2
<2
<2
<2
<2
<2
PFECA B
<2
<2
<2
<2
<2
<2
<2
<2
537 Mod PFAS (ng/L)
PFBA
<5
<5
<5
<5
<5
<5
<5
<5
PFPeA
4.7
<2
2.9
<2
<2
<2
<2
<2
PFHxA
5.9
<2
2.1
<2
<2
<2
<2
<2
PFOA
5.1
<2
<2
<2
<2
<2
<2
<2
PFNA
<2
<2
<2
<2
<2
<2
<2
<2
PFDA
<2
<2
<2
<2
<2
<2
<2
<2
PFUnDA
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDA
<2
<2
<2
<2
<2
<2
<2
<2
PFTriDA
<2
<2
<2
<2
<2
<2
<2
<2
PFTeDA
<2
<2
<2
<2
<2
<2
<2
<2
PFHxDA
<3
<3
<3
<3
<3
<3
<3
<3
PFODA
<3
<3
<3
<3
<3
<3
<3
<3
PFBS
5.6
<2
26 J
<2
<2
<2
<2
<2
PFPeS
7.2
<2
<2
<2
<2
<2
<2
<2
PFHxS
69
<2
<2
<2
<2
<2
<2
<2
PFHpS
2.3
<2
<2
<2
<2
<2
<2
<2
PFOS
160
<2
<2
<2
<2
<2
<2
<2
PFNS
<2
<2
<2
<2
<2
<2
<2
<2
PFDS
<2
<2
<2
<2
<2
<2
<2
<2
PFDoDS
<3
<3
<3
<3
<3
<3
<3
<3
PFOSA
<2
<2
<2
<2
<2
<2
<2
<2
NMePFOSA
<3
<3
<3
<3
<3
<3
<3
<3
NMePFOSAE
<3
<3
<3
<3
<3
<3
<3
<3
NMePFOSAA
<2
<2
<2
<2
<2
<2
<2
<2
NEtPFOSA
<5
<5
<5
<5
<5
<5
<5
<5
NEtPFOSAE
<3
<3
<3
<3
<3
<3
<3
<3
NEtPFOSAA
<3
<3
<3
<3
<3
<3
<3
<3
4:2 FTS
<2
<2
<2
<2
<2
<2
<2
<2
6:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
8:2 FTS
<3
<3
<3
<3
<3
<3
<3
<3
10:2 FTS
<5
<5
<5
<5
<5
<5
<5
<5
DONA
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Major
<2
<2
<2
<2
<2
<2
<2
<2
F-53B Minor
<2
<2
<2
<2
<2
<2
<2
<2
Notes:
DUP - field duplicate
FS - field sample
J - associated result is estimated
ng/L - nanograms per liter
PFAS - per- and polyfluoroalkyl substance
UJ - analyte not detected and reporting limit is uncertain
< - analyte not detected above associated reporting limit
R - result does not meet acceptance criteria
TR1043 Page 17 of 17 March 2024

TABLE A.4
PFAS ANALYTICAL RESULTS - NCDEQ JANUARY 2024 SAMPLED LOCATIONS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Within Sampling Eligibility Criteria'
Yes
Yes
Yes
Yes
Yes
Yes
No
Regulatory Location ID
1020613
1026796
1040950
1213044
1213117
1074633
1099976
Sample Date
01/31/2024
01/24/2024
01/31/2024
01/24/2024
01/24/2024
01/24/2024
01/24/2024
QA/QC
FS
FS
ITS
FS
FS
ITS
ITS
Sampling Program
NCDEQ Four Counties
NCDEQ Four Counties
NCDEQ Four Counties
NCDEQ Four Counties
NCDEQ Four Counties
NCDEQ Four Counties
NCDEQ Four Counties
Sample Delivery Group (SDG)
653725
652835
653725
652835
652835
652835
652835
Lab Sample ID
653725002
652835001
653725003
652835006
652835005
652835007
652835003
Mitigation Eligibility
RO
No Action
No Action
No Action
No Action
No Action
No Action
CO Attachment C PFAS (ng/L)
Hfpo Dimer Acid
<0.171
<0.166
<0.173
<0.172
<0.179
<0.185
<0.167
PFMOAA
11
1.96
0.722
<0.172
<0.179
0.992
0.555
PFO2HxA
3.02
0.334
<0.173
<0.172
<0.179
<0.185
<0.167
PFO3OA
0.604
<0.166
<0.173
<0.172
<0.179
<0.185
<0.167
PFO4DA
<0.171
<0.166
<0.173
<0.172
<0.179
<0.185
<0.167
PFO5DA
<0.171
<0.166
<0.173
<0.172
<0.179
<0.185
<0.167
PMPA
<0.171
<0.166
<0.173
<0.172
<0.179
<0.185
<0.167
PEPA
<0.171
<0.166
<0.173
<0.172
<0.179
<0.185
<0.167
PS Acid
<0.171
<0.166
<0.173
<0.172
<0.179
<0.185
<0.167
Hydro -PS Acid
<0.171
<0.166
<0.173
<0.172
<0.179
<0.185
<0.167
PFECA-G
<0.171
<0.166
<0.173
<0.172
<0.179
<0.185
<0.167
Perfluoroheptanoic Acid
<0.565
<0.547
<0.57
<0.567
<0.592
<0.61
<0.55
Total Attachment C (ng/L)
15
2.3
0.7
ND
ND
1.0
0.6
Other Table 3+ PFAS (ng/L)
R-PSDA
0.581
<0.166
<0.173
<0.172
<0.179
<0.185
<0.167
Hydrolyzed PSDA
<0.171
<0.166
<0.173
<0.172
<0.179
<0.185
<0.167
R-PSDCA
<0.171
<0.166
<0.173
<0.172
<0.179
<0.185
<0.167
NVHOS, Acid Form
<0.171
<0.166
<0.173
<0.172
<0.179
<0.185
<0.167
EVE Acid
<0.171
<0.166
<0.173
<0.172
<0.179
<0.185
<0.167
Hydro -EVE Acid
<0.171
<0.166
<0.173
<0.172
<0.179
<0.185
<0.167
R-EVE
<1.13
<1.09
<1.14
<1.13
<1.18
<1.22
<1.1
Perfluoro(2-ethoxyethane)sulfonic Acid
<0.171
<0.166
<0.173
<0.172
<0.179
<0.185
<0.167
PFECA B
<0.171
<0.166
<0.173
<0.172
<0.179
<0.185
<0.167
PPF Acid
4.26
<3.32
<17
<3.44
<3.59
<19
<3.34
HFPO Trimer Acid
<1.71
<1.66
<1.73
<1.72
<1.79
<1.85
<1.67
HFPO Tetramer Acid
<1.71
<1.66
<1.73
<1.72
<1.79
<1.85
<1.67
TR1043 Page 1 of 4 March 2024

TABLE A.4
PFAS ANALYTICAL RESULTS - NCDEQ JANUARY 2024 SAMPLED LOCATIONS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Within Sampling Eligibility Criteria'
Yes
Yes
Yes
Yes
Yes
Yes
No
Regulatory Location ID
1020613
1026796
1040950
1213044
1213117
1074633
1099976
Sample Date
01/31/2024
01/24/2024
01/31/2024
01/24/2024
01/24/2024
01/24/2024
01/24/2024
QA/QC
FS
FS
ITS
FS
FS
ITS
ITS
Sampling Program
NCDEQ Four Counties
NCDEQ Four Counties
NCDEQ Four Counties
NCDEQ Four Counties
NCDEQ Four Counties
NCDEQ Four Counties
NCDEQ Four Counties
Sample Delivery Group (SDG)
653725
652835
653725
652835
652835
652835
652835
Lab Sample ID
653725002
652835001
653725003
652835006
652835005
652835007
652835003
Mitigation Eligibility
RO
No Action
No Action
No Action
No Action
No Action
No Action
Other 537 Mod PFAS (ng/L)
11C1-PF3OUdS
<0.565
<0.547
<0.57
<0.567
<0.592
<0.61
<0.55
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
<1.13
<1.09
<1.14
<1.13
<1.18
<1.22
<1.1
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
<1.13
<1.09
<11
<1.13
<1.18
<1.22
<1.1
2-(N-ethyl perfluoro-l-octanesulfonamido)-ethanol
<1.13
<1.09
<1.14
<1.13
<1.18
<1.22
<1.1
2-(N-methyl perfluoro-l-octanesulfonamido)-ethanol
<1.13
<1.09
<1.14
<1.13
<1.18
<1.22
<1.1
6:2 Fluorotelomer sulfonate
<4.6
<4.46
<4.65
<4.62
<4.83
<4.97
<4.49
9C1-PF3ONS
<1.13
<1.09
<1.14
<1.13
<1.18
<1.22
<1.1
DONA
<0.565
<0.547
<0.57
<0.567
<0.592
<0.61
<0.55
N-Ethyl Perfluorooctane Sulfonamidoacetic Acid
<1.13
<1.09
<1.14
<1.13
<1.18
<1.22
<1.1
N-ethylperfluoro-l-octanesulfonamide
<1.13
<1.09
<1.14
<1.13
<1.18
<1.22
<1.1
N-methyl perfluoro-l-octanesulfonamide
<1.13
<1.09
<1.14
<1.13
<1.18
<1.22
<1.1
N-Methyl Perfluorooctane Sulfonamidoacetic Acid
<1.13
<1.09
<1.14
<1.13
<1.18
<1.22
<1.1
Perfluorobutane Sulfonic Acid
<0.565
<0.547
<0.57
<0.567
<0.592
<0.61
0.883
Perfluorobutanoic Acid
<0.684
<0.663
<0.691
<0.687
<0.718
<0.739
<0.667
Perfluorodecane Sulfonic Acid
<0.565
<0.547
<0.57
<0.567
<0.592
<0.61
<0.55
Perfluorodexanoic Acid
<0.667
<0.647
<0.674
<0.67
<0.7
<0.721
<0.65
Perfluorododecane Sulfonic Acid (PFDoS)
<0.565
<0.547
<0.57
<0.567
<0.592
<0.61
<0.55
Perfluorododecanoic Acid
<0.565
<0.547
<0.57
<0.567
<0.592
<0.61
<0.55
Perfluoroheptane Sulfonic Acid (PFHpS)
<0.565
<0.547
<0.57
<0.567
<0.592
<0.61
<0.55
Perfluorohexadecanoic Acid (PFHxDA)
<1.13
<1.09
<1.14
<1.13
<1.18
<1.22
<1.1
Perfluorohexane Sulfonic Acid
<0.565
<0.547
<0.57
<0.567
<0.592
<0.61
0.899
Perfluorohexanoic Acid
0.875
<0.663
<0.691
<0.687
<0.718
0.748
<0.667
Perfluorononanesulfonic Acid
<0.599
<0.58
<0.604
<0.601
<0.628
<0.647
<0.584
Perfluorononanoic Acid
<0.565
<0.547
<0.57
<0.567
<0.592
<0.61
<0.55
Perfluorooctadecanoic Acid
<1.13
<1.09
<1.14
<1.13
<1.18
<1.22
<1.1
Perfluorooctane Sulfonamide
<0.565
<0.547
<0.57
<0.567
<0.592
<0.61
<0.55
Perfluoropentane Sulfonic Acid (PFPeS)
<0.565
<0.547
<0.57
<0.567
<0.592
<0.61
<0.55
Perfluoropentanoic Acid
0.897
<0.547
<0.57
<0.567
<0.592
1.01
<0.55
Perfluorotetradecanoic Acid
<0.684
<0.663
<0.691
<0.687
<0.718
<0.739
<0.667
Perfluorotridecanoic Acid
<0.565
<0.547
<0.57
<0.567
<0.592
<0.61
<0.55
Perfluoroundecanoic Acid
<0.565
<0.547
<0.57
<0.567
<0.592
<0.61
<0.55
PFECA-A
<0.171
<0.166
<0.173
<0.172
<0.179
<0.185
<0.167
PFECA-F
<0.171
<0.166
<0.173
<0.172
<0.179
<0.185
<0.167
PFOA
1.37
<0.663
<0.691
<0.687
<0.718
<0.739
<0.667
PFOS
1.73
<0.663
<0.691
<0.687
<0.718
<0.739
<0.667
TR1043 Page 2 of 4 March 2024

TABLE A.4
PFAS ANALYTICAL RESULTS - NCDEQ JANUARY 2024 SAMPLED LOCATIONS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Within Sampling Eligibility Criteria'
No
No
No
No
Regulatory Location ID
1120034
1131694
1135285
1150758
Sample Date
O1/24/2024
01/31/2024
01/31/2024
01/31/2024
QA/QC
ITS
ITS
FS
FS
Sampling Program
NCDEQ Four Counties
NCDEQ Four Counties
NCDEQ Four Counties
NCDEQ Four Counties
Sample Delivery Group (SDG)
652835
653725
653725
653725
Lab Sample ID
652835004
653725004
653725005
653725006
Mitigation Eligibility
No Action
No Action
No Action
No Action
CO Attachment C PFAS (ng/L)
Hfpo Dimer Acid
<0.168
<0.171
<0.172
<0.173
PFMOAA
<0.168
<0.171
<0.172
<0.173
PFO2HxA
<0.168
<0.171
<0.172
<0.173
PFO3OA
<0.168
<0.171
<0.172
<0.173
PFO4DA
<0.168
<0.171
<0.172
<0.173
PFO5DA
<0.168
<0.171
<0.172
<0.173
PMPA
<0.168
<0.171
<0.172
<0.173
PEPA
<0.168
<0.171
<0.172
<0.173
PS Acid
<0.168
<0.171
<0.172
<0.173
Hydro -PS Acid
<0.168
<0.171
<0.172
<0.173
PFECA-G
<0.168
<0.171
<0.172
<0.173
Perfluoroheptanoic Acid
<0.553
<0.565
<0.569
<0.57
Total Attachment C (ng/L)
ND
ND
ND
ND
Other Table 3+ PFAS (ng/L)
R-PSDA
<0.168
<0.171
<0.172
<0.173
Hydrolyzed PSDA
<0.168
<0.171
<0.172
<0.173
R-PSDCA
<0.168
<0.171
<0.172
<0.173
NVHOS, Acid Form
<0.168
<0.171
<0.172
<0.173
EVE Acid
<0.168
<0.171
<0.172
<0.173
Hydro -EVE Acid
<0.168
<0.171
<0.172
<0.173
R-EVE
<1.11
<1.13
<1.14
<1.14
Perfluoro(2-ethoxyethane)sulfonic Acid
<0.168
<0.171
<0.172
<0.173
PFECA B
<0.168
<0.171
<0.172
<0.173
PPF Acid
<3.35
<17
<17
<3.46
HFPO Trimer Acid
<1.68
<1.71
<1.72
<1.73
HIPPO Tetramer Acid
<1.68
<1.71
<1.72
<1.73
TR1043 Page 3 of 4 March 2024

TABLE A.4
PFAS ANALYTICAL RESULTS - NCDEQ JANUARY 2024 SAMPLED LOCATIONS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Within Sampling Eligibility Criteria'
No
No
No
No
Regulatory Location ID
1120034
1131694
1135285
1150758
Sample Date
01/24/2024
01/31/2024
01/31/2024
01/31/2024
QA/QC
ITS
ITS
FS
FS
Sampling Program
NCDEQ Four Counties
NCDEQ Four Counties
NCDEQ Four Counties
NCDEQ Four Counties
Sample Delivery Group (SDG)
652835
653725
653725
653725
Lab Sample ID
652835004
653725004
653725005
653725006
Mitigation Eligibility
No Action
No Action
No Action
No Action
Other 537 Mod PFAS (ng/L)
l lCl-PF30UdS
<0.553
<0.565
<0.569
<0.57
1H,lH,2H,2H-perfluorodecanesulfonate (8:2 FTS)
<l.l 1
<1.13
<1.14
<1.14
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
<l.l 1
<1.13
<1.14
<1.14
2-(N-ethyl perfluoro-l-octanesulfonamido)-ethanol
<1.11
<1.13
<1.14
<1.14
2-(N-methyl perfluoro-l-octanesulfonamido)-ethanol
<1.11
<1.13
<1.14
<1.14
6:2 Fluorotelomer sulfonate
<4.51
<4.61
<4.63
<4.65
9C1-PF30NS
<1.11
<1.13
<1.14
<1.14
DONA
<0.553
<0.565
<0.569
<0.57
N-Ethyl Perfluorooctane Sulfonamidoacetic Acid
<l.l 1
<1.13
<1.14
<1.14
N-ethylperfluoro-l-octanesulfonamide
<1.11
<1.13
<1.14
<1.14
N-methyl perfluoro-l-octanesulfonamide
<1.11
<1.13
<1.14
<1.14
N-Methyl Perfluorooctane Sulfonamidoacetic Acid
<1.11
<1.13
<1.14
<1.14
Perfluorobctane Sulfonic Acid
<0.553
<0.565
<0.569
<0.57
Perfluorobutanoic Acid
<0.671
<0.685
<0.689
<0.691
Perfluorodecane Sulfonic Acid
<0.553
<0.565
<0.569
<0.57
Perfluorodecanoic Acid
<0.654
<0.668
<0.672
<0.674
Perfluorododecane Sulfonic Acid (PFDoS)
<0.553
<0.565
<0.569
<0.57
Perfluorododecanoic Acid
<0.553
<0.565
<0.569
<0.57
Perfluoroheptane Sulfonic Acid (PFHpS)
<0.553
<0.565
<0.569
<0.57
Perfluorohexadecanoic Acid (PFHxDA)
<1.11
<1.13
<1.14
<1.14
Perfluorohexane Sulfonic Acid
<0.553
<0.565
<0.569
<0.57
Perfluorohexanoic Acid
<0.671
<0.685
<0.689
<0.691
Perfluorononanesulfonic Acid
<0.587
<0.6
<0.603
<0.605
Perfluorononanoic Acid
<0.553
<0.565
<0.569
<0.57
Perfluorooctadecanoic Acid
<1.11
<1.13
<1.14
<1.14
Perfluorooctane Sulfonamide
<0.553
<0.565
<0.569
<0.57
Perfluoropentane Sulfonic Acid (PFPeS)
<0.553
<0.565
<0.569
<0.57
Perfluoropentanoic Acid
<0.553
<0.565
<0.569
<0.57
Perfluorotetradecanoic Acid
<0.671
<0.685
<0.689
<0.691
Perfluorotridecanoic Acid
<0.553
<0.565
<0.569
<0.57
Perfluoroundecanoic Acid
<0.553
<0.565
<0.569
<0.57
PFECA-A
<0.168
<0.171
<0.172
<0.173
PFECA-F
<0.168
<0.171
<0.172
<0.173
PFOA
<0.671
<0.685
<0.689
<0.691
PFOS
<0.671
<0.685
<0.689
<0.691
Notes:
1 - Expanded sampling eligibility criteria agreed to in November 2023
CO - Consent Order
FS - field sample
HFPO Dimer Acid - Hexafluoropropylene oxide dimer acid
HFPO Trimer Acid - Perfluoro-2,5-Dimethyl-3,6-Dioxanonanoic Acid
HFPO Tetramer Acid - Perfluoro-(2,5,8-trimethyl-3,6,9-trioxadodecanoic)acid
Hydro -PS Acid - Ethanesulfonic acid, 2-[1-[difluoro(1,2,2,2-
tetrafluoroethoxy)methyl]-1,2,2,2-tetrafluoroethoxy]-1,1,2,2
-tetrafluoro-
J - associated result is estimated
NCDEQ - North Carolina Department of Environmental Quality
ng/L - nanograms per liter
ND - Attachment C HAS not detected above associated reporting limits
PEPA - Perfluoro-2-ethoxypropionic acid
PFAS - per- and polyfluoroalkyl substance
PFECA-G - Perfluoro-4-isopropoxybutanoic acid
PFMOAA - Perfluoro-2-methoxyacetic acid
PF02HxA - Perfluoro-3,5-dioxahexanoic acid
PF03DA - Perfluoro-3,5,7-trioxaoctanoic acid
PF04DA - Perfluoro-3,5,7,9-tetraoxadecanoic acid
PF05DA - Perfluoro-3,5,7,9,1 1 -pentaoxadodecanoic acid
PS Acid - Ethanesulfonic acid, 2-
methyl]- 1,2,2,2-tetrafluoroethoxy] - 1, 1,2,2-tetrafluoro-
RO - Reverse osmosis
UJ - analyte not detected and reporting limit is uncertain
TR1043 Page 4 of 4 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.5
COMMUNITY WELLS SAMPLED (UP TO FEBRUARY 29, 2024)
Chemours Fayetteville Works, North Carolina
Number of
Drinking
Number of
Results
Water Wells
Properties
Date
Results
Managed By
PWS ID
System Name
Owner Name
Address
City
County
in System
Serviced
Sampled
Received
Owner
Result Category
Comments
COLLEGE VIEW
5736 MARKET ST
Single Attachment
NC0465112
Eston C Brinkley
W�kmngton
New Hanover
1
34
6/14/2022
Yes
No
MHP
UNIT 33
PFAS >= 10 ng/L
123 BROADVIEW
Single Attachment
NC0471114
SIDBURY'S MHP
Tom & Larry Sidburi
Hampstead
Pender
3
69
7/7/2022
Yes
Yes
LN
PFAS >= 10 ng/L
Joseph Rossi
NC7071022
HAMPSTEAD
(Hampstead Pines
218 CONIFER DR
Hampstead
Pender
2
70
7/14/2022
Yes
No
No Action
PINES
HOA)
NC0465624
POTTER'S SQUARE
Michael Swartz
5933 CAROLINA
Wilmington
New Hanover
1
8
8/17/2022
Yes
No
No Action
BUSINESS CNTR
BEACH RD
NC0465138
OAKLEY MHP
William J Hamilton
2202 OAKLEY RD
Castle Hayne
New Hanover
2
35
8/25/2022
YCs
No
No Action
Lot 1 and Lot 19 vacant.
MASONBORO
Masonboro Yacht
609 TRAILS END
NC0465465
YACHT CLUB &
Wilmington
New Hanover
1
1
7/29/2022
Yes
No Action
MARINA
Club & Marina
RD
Joseph W Davis
7658 MARKET ST
Single Attachment
NC7065075
LOST TREE LLC
W�hrungton
New Hanover
1
2
8/19/2022
Yes
No
2 tenant units in 1 building.
(Lost Tree LLC)
UNIT A
PFAS >= 10 ng/L
Janet and David Lon
NC7065037
SPECIALTY
(Long Family
312 CROWATAN
Castle Hayne
New Hanover
1
1
8/31/2022
Yes
No Action
ENGRAVING
Properties V LP'
RD
Glenn Williams
3941 US HWY 421
Single Attachment
NC7065069
PBSRE-WLM, LLC
(PBSRE-WLM,
Wilmington
New Hanover
1
1
9/2/2022
Yes
LLC
N
PFAS >= 10 ng/L
11 connections reported. During call, owne
NC7065056
SME INC USA
David Rouen Jr.
5949 CAROLINA
Wilmington
New Hanover
1
1
8/17/2022
Yes
No Action
indicated 1 tenant in building, which has —23
(SME INC USA)
BEACH RD
employees
MYRTLE GROVE
NC7065043
ANIMAL
Christian Bolz
6005 CAROLINA
Wilmington
New Hanover
1
1
8/17/2022
Yes
No Action
HOSPITAL
BEACH RD
Topsail Greens
NC0471122
TOPSAIL GREENS
Community
192 and 213
Hampstead
Pender
2
214
9/16/2022
Yes
No
No Action
S D
Associatior
CHAMPION DR
EAGLE ISLAND
2500 US HWY 421
Single Attachment
NC7065013
Carol B Flowers
Wilmington
New Hanover
1
1
9/13/2022
Yes
1 building used by 1 tenant.
FRUIT & SEAFOOD
N
PFAS >= 10 ng/L
WHISPERING
Whispering Pines
6547 CAROLINA
Single Attachment C
Services church and 1 mobile home for church
NC7065054
PINES BAPTIST
Wilmington
New Hanover
1
2
10/6/2022
Yes
CHURCH
Baptist Church
BEACH RD
PFAS >= 10 ng/L
employee.
The well services 2 nearby residences for potable
water and may be used by the clubhouse and slips f
ANCHORS BEND
A B Marina Owners
2127 CLEMMONS
HFPO-DA >= 10
drinking water. Following sampling, the marina an
NC0465210
Wilmington
New Hanover
3
10/13/2022
Yes
No
MARINA
Association Inc.
WAY
ng/L
two residences were mailed certificated results and
GAC offer letter. The Marina accepted the GAC
offer.
W Q GOODMAN
Alethea Jenkins (W
NC7065058
LLC
Q Goodman LLC)
7888 MARKET ST
Wilmington
New Hanover
1
1
10/11/2022
Yes
No action
NORTHGATE
1611 CASTLE
Single Attachment C
NC0465544
Fisher Holdings LLC
Wilmington
New Hanover
1
6
11/23/2022
Yes
No
Services 6 buildings, up to 15 business units.
BUSINESS PARK
HAYNE RD
PFAS >= 10 ng/L
TR1043 Page 1 of 3 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.5
COMMUNITY WELLS SAMPLED (UP TO FEBRUARY 29, 2024)
Chemours Fayetteville Works, North Carolina
Number of
Drinking
Number of
Results
Water Wells
Properties
Date
Results
Managed By
PWS_ID
System Name
Owner Name
Address
City
County
in System
Serviced
Sampled
Received
Owner
Result Category
Comments
5709
NC7065012
FELLOWSHIP
FELLOWSHIP
MURRAYVILLE
Wilmington
New Hanover
1
1
11/7/2022
Yes
No action
Services church building.
BAPTIST CHURCH
BAPTIST CHURCH
RD
NC7065003
INLET WATCH
INLET WATCH
801 PAOLI CT
Wilmington
New Hanover
150
1/18/2023
Yes
Yes
No action
Services clubhouse with food preparation area, and
YACHT CLUB
YACHT CLUB INC
STE A
150 wet slips
NCO465623
ROYS BAIT &
MARLEY, ROY
3821 US
Wilmington
New Hanover
1
1
1/26/2023
Yes
HFPO-DA >= 10
Services commercial property with cafe on -site
TACKLE SHOT
HIGHWAY 421 Is
n /L
Large industrial complex serviced by 4 drinking
CORNING
water wells and I irrigation well. Irrigation well
NCO465532
CORNING INC
INCORPORATED
310 N COLLEGE
Wilmington
New Hanover
4
TBD
8/2/2023
Yes
Yes
HFPO D >= 10
(Well 1) and 3 of 4 drinking water wells (Wells 2, 3
RD
ng/L
465532
and 5) sampled 8/2/2023.One drinking water well
(Well 4) was offline at time of sampling.
Spoke with owner of property who requested that
letter be reissued to her directly, rather than Hobbs
SWEETWATER
Enterprises LLC. She will review and call back if
NCO465644
TIPPETT, KINZY
8024 MARKET ST
Wilmington
New Hanover
TBD
TBD
TBD
TBD
TBD
TBD
LANDING
she wants sampling. Multiple attempts have been
made to make contact with owner to schedule
sampling but have been unresponsive so far.
Services I building with 3 tenant units. Multiph
NC7065022
SOUTH OAKS
FURR, Barbara
7946 MARKET ST
Wilmington
New Hanover
1
3
TBD
TBD
TBD
TBD
attempts have been made to make contact with
CENTER
owner to schedule sampling but have been
unresponsive so far.
LEA ACRES
LEA ACRES
Owner provided addresses and contact information
NCO471113
WATER CO INC
WATER CO INC
240 GAIL RD
Willard
Pender
1
46
6/26/2023
Yes
No
No action
for connected properties on 7/26/2023.
SOUTHERN
SOUTHERN
Services commercial building. No other propertie
Attachment
Single ApFAS
NC7065046
INDUSTRIAL
INDUSTRIAL
136 ROYMAC DR
Wilmington
New Hanover
1
1
1/3/2024
Yes
No
share this well. Results will be mailed to owner and
CONSTRUCTORS
CONSTRUCTORS
>t 10 ng L
tenant.
Multiple attempts have been made to make contac
NC7065023
MASTEC
MASTEC
3857 US HWY 421
Wilmington
New Hanover
TBD
TBD
TBD
lB l)
TBD
TBD
with owner to schedule sampling but have been
N
unresponsive so far.
ASSURANCE
Mobile home park identified at property previous)
NC7065073
MG COURT #1
ENTERPRISES,
6018 MYRTLE
Wilmington
New Hanover
TBD
TBD
TBD
TBD
TBD
TBD
marked as vacant according to real estate records.
LLC
GROVE RD
Contact information for Assurance Enterprises, LL
identified. Multiple attempts have been made to
ASSURANCE
NC7065074
MG COURT #2
ENTERPRISES,
6018 MYRTLE
Wilmington
New Hanover
TBD
TBD
TBD
1'BD
TBD
TBD
make contact with owner to schedule sampling but
LLC
GROVE RD
have been unresponsive so fat
This address is one of the locations serviced b:
FIGURE 8 ISLAND community well system. HO
NCO465119
FIGURE 8 ISLAND
Figure 8 Island HOA
15 BRIDGE RD
Wilmington
New Hanover
5
498
8/30/2023
Yes
Yes
No action
President declined sampling in September 2022.
Call team made contact again in August 2023 and
HOA president is amenable to sampling now. Well
sam led 08/30/2023.
NC7071024
COASTAL FITNESS
SZEM, BRAD
98 QUARTER
Hampstead
Pcndcr
1
3/24/2023
Yes
No
No action
Services fitness center and one other business that
CENTER
HORSE LN
leases s ace in the building
Property previously screened as ineligible for
SHADY HAVEN
4307 PARMELE
sampling based on original eligibility criteria.
NC0465164
POPE, WADE
Castle Hayne
New Hanover
21
12/27/2023
Yes
Yes
No action
MHP
RD TRLR 1
Property re -screened using expanded eligibility
criteria on 12/1/2023 and is eligible for sampling.
TR1043 Page 2 of 3 March 2024

Geosyntec Consultants of NC, P.C.
TABLE A.5
COMMUNITY WELLS SAMPLED (UP TO FEBRUARY 29, 2024)
Chemours Fayetteville Works, North Carolina
Number of
Drinking
Number of
Results
Water Wells
Properties
Date
Results
Managed By
PWS ID
System Name
Owner Name
Address
City
County
in System
Serviced
Sampled
Received
Owner
Result Category
Comments
Property previously screened as ineligible for
WEST PENDER
Pender Co. Board of
10750 NC
sampling based on original eligibility criteria.
NCO471444
Burgaw
Pender
2
1
12/20/2023
Yes
Yes
No action
MIDDLE SCHOOL
Education
HIGHWAY 53 W
Property re -screened using expanded eligibility
criteria on 12/1/2023 and is eligible for sampling.
Ball park. Well used for drinking water in
NC7065065
CAPE FEAR
OPTIMIST CLUB
3222 N KERR
Wilmington
New Hanover
1
1
1/22/2024
No
No
No action
buildings on property: main club building and
OPTIMIST PARK #3
OF CAPE FEAR
AVE
concession stand. Sample collected 1/22/202,
Community well record identified 2/l/2024. Cal
NC0471317
CEDAR ON THE
WILLIAM
FITZH
17077 US
Hampstead
Pender
TBD
TBD
TBD
TBD
TBD
TBD
team attempting to make contact with owner to
GREEN
LEE/JERENE LEE
HIGHWAY 17
collect information necessary to complete eligibili
screening
Community well record screened 2/1/2024. Propert
NC0424539
SOUTHERN TABLE
TBD
7722 SEVEN
Nakina
Columbus
TBD
TBD
TBD
TBD
TBD
TBD
in the process of being sold, call team will
RESTAURANT
CREEKS HWY
coordinate sampling with new owners after the sale
is completed
SCOTT'S HILL
Community well record screened 2/l/2024. Cal
NCO471480
BAPTIST CH-
Phil Ortego Sr Pastot
185 SCOTTS HILL
Wilmington
Pender
TBD
TBD
TBD
TBD
TBD
lB I)
team attempting to make contact to schedule
FRONT
LOOP RD
sampling
NEW HANOVER
Brian Kohlenberg
Community well record screened 2/20/2024
NC7065019
COUNTY
(Facility
5US
Wilmington
New Hanover
1
1
TBD
TBD
Yes
TBD
Services 3 buildings on the property and 38
LANDFILL
Su erintendent'
HIGHWAY 421 N
em to ees. Sampling scheduled for 3/5/202,
Notes:
ng/L nanograms per liter
PFAS Per- and polyfluroalkyl substances
TBD To be determined
TR1043 Page 3 of 3 March 2024

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River Buffer'
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Four Counties Boundary
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NEW HANOVER
Notes:
NCDEQ -The North Carolina Department of Environmental Quality
1. The river buffer includes (i) the extent of the 100-year floodplain associated with
Cape Fear River as provided by the Federal Emergency Management Agency
(FEMA); (ii) the limits of saltwater marshes in the areas where Black River and
Northeast Cape Fear River meet Cape Fear to account for the possibility of tidal
backwash of Cape Fear River into these rivers; and (iii) the last half mile floodplain
of each tributary before it joins the Cape Fear River.
2. County boundaries and major hydrography waterbodies were downloaded from
NC OneMap site (https://www.nconemap.gov).
3. Basemap source: Esri, HERE, Garmin, (c) OpenStreetMap contributors, and the
GIs user community.
4 2 0 4 Miles
Sampling Eligibility Screening - Cumulative
Brunswick County
Chemours Fayetteville Works
North Carolina
GeosyntecO Geosyntec Consultants of NC, RC. Figure
consultants NC License No.: C-3500 and C-295
A1.1
Raleigh March 2024

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Notes:
NCDEQ -The North Carolina Department of Environmental Quality
1. The river buffer includes (i) the extent of the 100-year floodplain associated with
Cape Fear River as provided by the Federal Emergency Management Agency
(FEMA); (ii) the limits of saltwater marshes in the areas where Black River and
Northeast Cape Fear River meet Cape Fear to account for the possibility of tidal
backwash of Cape Fear River into these rivers; and (iii) the last half mile floodplain
of each tributary before it joins the Cape Fear River.
2. County boundaries and major hydrography waterbodies were downloaded from
NC OneMap site (https://www.nconemap.gov).
3. Basemap source: Esri, HERE, Garmin, (c) OpenStreetMap contributors, and the
GIS user community.
4 2 0 4 Miles
Sampling Eligibility Screening - Cumulative
Columbus County
Chemours Fayetteville Works
North Carolina
GeosyntecO Geosyntec Consultants of NC, RC. Figure
consultants NC License No.: C-3500 and C-295
A1.2
Raleigh March 2024

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River Buffer'
_Cape Fear River and Other Major Hydrography
Waterbodies
Four Counties Boundary
Surrounding North Carolina County
Notes:
NCDEQ -The North Carolina Department of Environmental Quality
1. The river buffer includes (i) the extent of the 100-year floodplain associated with
Cape Fear River as provided by the Federal Emergency Management Agency
(FEMA); (ii) the limits of saltwater marshes in the areas where Black River and
Northeast Cape Fear River meet Cape Fear to account for the possibility of tidal
backwash of Cape Fear River into these rivers; and (iii) the last half mile floodplain
of each tributary before it joins the Cape Fear River.
2. County boundaries and major hydrography waterbodies were downloaded from
NC OneMap site (https://www.nconemap.gov).
3. Basemap source: Esri, HERE, Garmin, (c) OpenStreetMap contributors, and the
GIs user community.
4 2 0 4 Miles
Sampling Eligibility Screening - Cumulative
New Hanover County
Chemours Fayetteville Works
North Carolina
Geosyntecl�' Geosyntec Consultants of NC, RC. Figure
consultants NC License No.: C-3500 and C-295
A1.3
Raleigh March 2024

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River Buffer'
Cape Fear River and Other Major Hydrography
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_
Waterbodies
Four Counties Boundary
Surrounding North Carolina County
Notes:
NCDEQ -The North Carolina Department of Environmental Quality
1. The river buffer includes (i) the extent of the 100-year floodplain associated with
Cape Fear River as provided by the Federal Emergency Management Agency
(FEMA); (ii) the limits of saltwater marshes in the areas where Black River and
Northeast Cape Fear River meet Cape Fear to account for the possibility of tidal
backwash of Cape Fear River into these rivers; and (iii) the last half mile floodplain
of each tributary before it joins the Cape Fear River.
2. County boundaries and major hydrography waterbodies were downloaded from
NC OneMap site (https://www.nconemap.gov).
3. Basemap source: Esri, HERE, Garmin, (c) OpenStreetMap contributors, and the
GIs user community.
4 2 0 4 Miles
Sampling Eligibility Screening - Cumulative
Pender County
Chemours Fayetteville Works
North Carolina
GeosyntecO Geosyntec Consultants of NC, RC. Figure
consultants NC License No.: C-3500 and C-295
A1.4
Raleigh March 2024

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Notes:
1. Sampling Eligibility Criteria, as defined in the Interim Four Counties Sampling and
Drinking Water Plan (New Hanover, Brunswick, Columbus and Fender Counties),
version 3, dated June 1, 2022.
2. The river buffer includes (i) the extent of the 100-year floodplain associated with
Cape Fear River as provided by the Federal Emergency Management Agency
(FEMA); (ii) the limits of saltwater marshes in the areas where Black River and
Northeast Cape Fear River meet Cape Fear to account for the possibility of tidal
backwash of Cape Fear River into these rivers; and (III) the last half mile floodplain
of each tributary before it joins the Cape Fear River.
3. County boundaries and major hydrography waterbodies were downloaded from
NC OneMap site (https://www.nconemap.gov).
4. Basemap source: Esri, HERE, Garmin, (c) OpenStreetMap contributors, and the
GIs user community.
4 2 0 4 Miles
Sampling Eligibility Details - Cumulative
Chemours Fayetteville Works
North Carolina
Geosyntecl�' Geosyntec Consultants of NC, RC. Figure
consultants NC License No.: C-3500 and C-295
A2
Raleigh March 2024