NC0090042_Report_20250131

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Geosynteccl'
consultants
Geosyntec Consultants of NC, P.C.
NC License No.: C-3500 and C-295
Cape Fear River PFAS
Outfa11004 NPDES Permit
River Transect Monitoring - 2024 Report
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 TR1287
January 2025
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TABLE OF CONTENTS
1 Introduction...........................................................................................................................3
1.1 Monitoring and Report Objectives...............................................................................3
1.2 Report Organization.....................................................................................................4
2 Sampling Activities and Laboratory Analysis.......................................................................5
2.1 Sampling Activities......................................................................................................5
2.2 Laboratory Analyses....................................................................................................
5
3 PFAS Analytical Results.......................................................................................................6
3.1 Data Validation............................................................................................................
6
3.2 Equipment Blanks, Quality Assurance/Quality Control, and Duplicate Samples .......7
3.3 Analytical Results and Summary of Findings..............................................................7
3.4 Effects of River Flows.................................................................................................
8
3.5 Concentration Trends Over Time at River Transects..................................................
8
3.6 Concentration Trends Over Time at Tar Heel.............................................................9
4 PFAS Mass Discharge Calculations....................................................................................11
4.1 Mass Discharge Over Time at River Transects.........................................................11
4.2 Mass Loads Over Time at Tar Heel...........................................................................12
5 Request to Discontinue Transect Sampling.........................................................................14
6 Summary and Conclusions..................................................................................................15
References.....................................................................................................................................16
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LIST OF TABLES
Table 1 Transect and Sampling Locations
Table 2 River Transect Samples — Field Parameters (2024)
Table 3 Summary of Analytical List (2024)
Table 4A River Transect Samples — Analytical Data Results (March 2024)
Table 4B River Transect Samples — Analytical Data Results (May 2024)
Table 4C River Transect Samples — Analytical Data Results (September 2024)
Table 4D River Transect Samples — Analytical Data Results (November 2024)
Table 5 River Transect Samples — Mass Discharge Results (2024)
Table 6 Summary of River Transects Concentration and Mass Discharge by Year
LIST OF FIGURES
Figure 1 Cape Fear River Transect Sampling Locations
Figure 2 Box and Whisker Plots of Total Table 3+ (17 Compounds) Concentration and
Mass Discharge at River Transects by Year
Figure 3 Total Table 3+ (17 Compounds) Concentrations, Mass Discharge, and Daily Flow
and Precipitation at 004 NPDES River Transects and Tar Heel Ferry Road Bridge
Figure 4 Four -Quarter Rolling Average Concentrations at Tar Heel by Quarter
LIST OF APPENDICES
Appendix A Concentration Trends (2024)
Appendix B Field Forms
Appendix C Laboratory Reports and DVMs
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Geosyntec Consultants of NC, P.C. (Geosyntec) has prepared this Cape Fear River PFAS Outfall
004 NPDES Permit River Transect Monitoring - 2024 Report for The Chemours Company, FC,
LLC (Chemours). This annual report provides the quarterly monitoring results for per- and
polyfluoroalkyl substances (PFAS) concentrations collected in 2024 from four transects along the
Cape Fear River, pursuant to the requirements defined in Section A.(7.) of the Final National
Pollutant Discharge Eliminations System (NPDES) Permit for Outfall 004 dated September 15,
2022 (Permit NC0090042, hereinafter "Permit"). The first sampling event occurred on November
1 and 2, 2022, within 60 days of the approval of the Permit. This is the third annual report prepared
since issuance of the Permit.
Chemours operates the Fayetteville Works facility in Bladen County, North Carolina (the Site)
(Figure 1). The Site is within a 2,177-acre property at 22828 NC Highway 87, approximately 20
miles southeast of the city of Fayetteville. Prior to issuance of the Permit, Chemours installed
multiple remedies to capture PFAS at the Site and to prevent PFAS from reaching the Cape Fear
River, including the Outfall 003 treatment system, Outfall 002 stormwater treatment system
(SWTS), and on -site seep interim flow -through cells (FTCs). Since the issuance of the Permit,
Chemours installed additional remedies, including the groundwater extraction system, seep ex -situ
capture system, and the barrier wall remedy. The groundwater extraction and barrier wall were
fully operational on June 11, 2023, making 2024 the first complete year that these remedies were
fully operating.
In addition to sampling the four river transects, Chemours monitors the Cape Fear River at Tar
Heel Ferry Road Bridge (or Tar Heel), approximately 7 miles downstream of the Site. Tar Heel is
a well -mixed location along the Cape Fear River (Geosyntec, 2018) and is sampled more
frequently than the river transects (twice weekly since 2020'). Data collected from Tar Heel
provide a more comprehensive understanding of the river concentrations with time, as there is
inherent variability among in -river PFAS concentrations, river flows, and weather conditions (i.e.,
rainfall). It is therefore critical to incorporate the data collected from Tar Heel when evaluating
trends in the PFAS concentrations and mass discharges (or mass loads) at the Cape Fear River.
1.1 Monitoring and Report Objectives
The primary objectives of the monitoring are as follows:
1. Provide the concentration trends for the three PFAS indicator compounds (HFPO-DA,
PFMOAA, and PMPA) at the river transects, as per Permit requirements.
' CFR-TARHEEL is sampled pursuant to the requirements of paragraphs 1(a) and 1(b) of the Addendum to Consent
Order paragraph 12 (CO Addendum) and paragraph 16 of the executed Consent Order (CO) (dated February 25,
2019) between the North Carolina Department of Environmental Quality (NCDEQ), Cape Fear River Watch, and
Chemours.
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2. Compare the results from the river transect sampling to the results collected in the Cape
Fear River at Tar Heel Ferry Road Bridge (or Tar Heel).
3. Evaluate if there is a decrease in concentration and loads in the Cape Fear River since the
start of the river transect sampling program using data from the transect sampling and the
Tar Heel sampling programs that allow for Chemours to discontinue quarterly river transect
sampling program.
1.2 Report Organization
This report is organized as follows:
• Section 2 presents details of the field work conducted (e.g., samples collected,
measurements taken) and the laboratory analyses completed.
• Section 3 presents the sampling results.
• Section 4 presents the mass discharge calculations, and a comparison to the results from
Tar Heel.
• Section 5 requests discontinuing river transect sampling based on reductions in river
concentrations and loads presented in Sections 3 and 4.
• Section 6 provides a summary and conclusions of the river transect sampling in 2024.
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2 SAMPLING ACTIVITIES AND LABORATORY ANALYSIS
Field work associated with collecting data for this Outfall 004 NPDES Permit River Transect
monitoring program was completed by Parsons of NC (Parsons) and Geosyntec. Four sampling
events occurred during 2024:
• First Quarter 2024 (Q1 2024): March 12, 2024
• Second Quarter 2024 (Q2 2024): May 1, 2024
• Third Quarter 2024 (Q3 2024): September 4, 2024
• Fourth Quarter 2024 (Q4 2024): November 13, 2024
The scope of sampling and analysis conducted are presented below.
2.1 Sampling Activities
Surface water grab samples were collected and analysed for PFAS at the following four transects
along the Cape Fear River (Figure 1 and Table 1).
• Transect 1: North of Willis Creek
• Transect 2: Adjacent to the Site
• Transect 3: Between William O Huske Dam and Outfall 002
• Transect 4: Downstream of Outfall 003 and Georgia Branch Creek
Three grab samples were collected at each transect, which were nominally spaced at 1/4, %2 and 3/4
of the distance across the river. Each sample was collected at the middle depth between the river
surface and the bottom of the river at the sampling point. These samples were collected using a
peristaltic pump and new dedicated high -density polyethylene (HDPE) or low -density
polyethylene (LDPE2) tubing and dedicated silicone tubing for the pump head.
In 2024, for each quarterly event 12 primary samples (annual total of 48 primary samples) and one
field duplicate (annual total of 4 total field duplicates) were collected. Field parameters were
measured for the primary samples and are provided in Table 2 and the field forms are provided in
Appendix B.
2.2 Laboratory Analyses
Samples were sent to Eurofins Scientific (West Sacramento, California). As per the Permit
requirements, the samples were analyzed for Table 3+ Laboratory standard operating procedure
(SOP) (20 compounds). The list of analytes is presented in Table 3.
2 Results from equipment blank samples collected by Chemours support the continued use LDPE tubing.
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3 PFAS ANALYTICAL RESULTS
PFAS analytical results from samples collected at the river transects are presented in Table 4A
through 4D. In 2024, the samples were within the acceptable temperature requirements for
preservation during storage and shipping (i.e., between not frozen to 6°C with a target of 4°C) as
outlined in the Chemours PFAS Program QAPP (AECOM, 2018). The laboratory reports and Data
Verification Module (DVM) reports are provided in Appendix C. The analytical data have been
reviewed and validated. The duplicate samples have been compared to the primary samples.
Concentration trends for the three PFAS indicator compounds (HFPO-DA, PFMOAA, and PMPA;
reported in nanograms per liter [ng/L]) are presented in Appendix A, as concentration across the
river transects, starting from the west sample (i.e., closest to the Site) to center sample to east
sample (i.e., farthest from the site).
3.1 Data Validation
Laboratory analytical data for the samples collected in 2024 were reviewed using the Data
Verification Module (DVM) within the LocusTM Environmental Information Management (EIM)
system, a commercial data management software program. Following the DVM process, a manual
review of the data was conducted. The DVM and the manual review results were combined in a
DVM narrative report for each set of sample results which is consistent with Stage 2b of the
USEPA Guidance for Labeling Externally Validated Laboratory Analytical Data for Superfund
Use (USEPA, 2009). The DVM narrative report summarizes which samples were qualified (if
any), the specific reasons for the qualification, and any potential bias in reported results. The data
usability, in view of the project's data quality objectives (DQOs), was assessed, and the data were
entered into the EIM system.
The data were evaluated by the DVM against the following data usability checks:
• Hold time criteria
• Field and laboratory blank contamination
• Completeness of QA/QC samples
• Matrix spike/matrix spike duplicate recoveries and the relative percent differences (RPDs)
between these spikes
• Laboratory control sample/laboratory control sample duplicate recoveries and the RPD
between these spikes
• Surrogate spike recoveries for organic analyses
• RPD between field duplicate sample pairs
A manual review of the data was also conducted, which included visual inspection of sample
chromatograms for appropriate integration and retention time, verification that detections in field
or equipment blanks have been applied to all applicable samples, and review of temperature
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requirements for sample preservation during storage and shipping. Based on the results of the
DVM plus manual review, the following data evaluation qualifiers were applied to the analytical
results as required:
• J - Analyte present, reported value may not be accurate or precise.
• UJ - Analyte not present above the reporting limit, reporting limit may not be accurate or
precise.
B - Analyte present in a blank sample, reported value may have a high bias.
The DVM narrative reports are provided in Appendix D. Overall, the DQOs were met for accuracy
and precision. The data collected are believed to be complete, representative, and comparable, with
the exception of R-PSDA, Hydrolyzed PSDA, and R-EVE; matrix interference studies have shown
that quantitation of these compounds is inaccurate due to interferences by the sample matrix
(Geosyntec, 2020). Results for these three analytes are J-qualified as estimated.
3.2 Equipment Blanks, Quality Assurance/Quality Control, and Duplicate
Samples
One equipment blank sample and one field duplicate was collected for each monthly sampling
event, except the sampling event in May 2024, where an equipment blank was not collected. There
were no other quality assurance/quality control samples collected for this reporting period. The
reported PFAS were not detected in the equipment blanks. The results for the primary and duplicate
samples had relative percent differences less than 30% for the reported compounds.
3.3 Analytical Results and Summary of Findings
Within each transect, the indicator PFAS concentrations were not detected above the reporting
limit or detected at low concentrations, but either were similar or decreased from west to east. The
concentrations measured at the river transect were also within the observed range at Tar Heel
(Figure 2). Below the graphical presentation of results presented in Appendix A is described for
each quarter.
• Q1 2024 — March 2024 (Figure Al): The three PFAS indicator parameters were not
detected above the reporting limit at all locations, except for the west sample at Transect
4, where PFMOAA was detected at 2.2 ng/L.
• 02 2024 — May 2024 (Figure A2): The three PFAS indicator parameters were not detected
above the reporting limit at Transect 1. HFPO-DA was detected in the center and east
samples at Transects 3 (2.6 ng/L and 2.2 ng/L,, respectively), and in all three samples at
Transect 4 (4.2 ng/L to 6.1 ng/L). PFMOAA was detected in the west sample at Transect
2 (4.8 ng/L); in the center and east samples at Transects 3 (7.6 ng/L and 4.8 ng/L,
respectively); and in all three samples at Transect 4 (10 ng/L to 20 ng/L).
• 03 2024 — September 2024 (Figure A3): The three PFAS indicator parameters were not
detected above the reporting limit at Transect 1 and Transect 2. PFMOAA were detected
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in the west sample at Transect 3 (2.1 ng/L), and in the west and center samples at Transect
4 (3.2 ng/L and 2.1 ng/L, respectively).
• 04 2024 - November 2024 (Figure A4): The three PFAS indicator parameters were not
detected above the reporting limit at Transect 1. HFPO-DA was detected in all samples at
Transects 2 to 4 (2.3 ng/L to 5.3 ng/L) except for the center sample at Transect 2. PFMOAA
was detected in all samples at Transects 2 to 4 (2.3 ng/L to 15 ng/L).
The table below summarizes the range of concentrations at each river transect.
Table 3+ Concentrations Summary — 2024 (ng/L)
River
Transect
HFPO-DA
PFMOAA
PMPA
Total Table 3+ (17 Compounds)
1
ND
ND
ND
ND
2
ND to 2.5
ND to 4.8
ND
ND to 11
3
ND to 2.6
ND to 7.6
ND
ND to 14
4
ND to 6.1
ND to 20
ND
ND to 40
Note: ND — non -detect, not detected above the reporting limit.
3.4 Effects of River Flows
In previous years, Chemours completed each sampling event over a two-day period, which caused
variabilities in the river concentrations from the fluctuations of the river flows over the two days
(Geosyntec, 2023a; 2024a). In 2024, for each sampling event, Chemours was able to use the newly
re -furbished and re -opened W.O. Huske dam launch point to sample all the river transect locations
on the same date, which minimized the fluctuations of river flows.
PFAS concentrations will vary both between river transects and between sampling events,
particularly with changing river flow volumes. At lower river flows, as observed in the Q2 and Q4
sampling events, inflows of PFAS compounds from transport pathways such as offsite
groundwater will mix in lower volume of river water and consequently have higher concentrations.
Although the concentrations vary with changing river flows, the PFAS mass discharge (product of
concentration and flow rate; as described in Section 4) remains relatively consistent and low at the
river transects. An instance of this is demonstrated by observing PFMOAA at Transect 4 location
401. In 2024, the mass discharge values listed in Table 5 were 0.64, 0.67, 0.58 and 0.54 milligrams
per second (mg/s) while concentrations varied much more (2.2, 20, 3.2 and 15 ng/L). This same
phenomenon of greater variability in concentrations compared to more stability in mass discharge
is also observed in the data collected at Tar Heel and displayed in Figure 2.
3.5 Concentration Trends Over Time at River Transects
Figure 3 presents the box and whisker plots of the Total Table 3+ (17 compounds) concentrations
at the river transect grouped by sampling year (2022 through 2024). The groundwater extraction
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and barrier wall remedies were implemented in 2023, making 2024 the first full year of them being
fully operating. As shown in the table below, the median Total Table 3+ (17 compounds)
concentrations have been decreasing over the years (2022: 7.1 ng/L; 2023: 3.9 ng/L; and 2024:
non -detect). As well, the highest measured Total Table 3+ (17 compounds) concentration at
Transect 4, where the highest concentrations were generally observed, was lower in 2024 (40 ng/L)
than previous years (56 ng/L and 82 ng/L; Geosyntec 2023a; 2024a).
These results are summarized in in -text table below.
Concentration Ran es and Median B Year n /L
HFPO-DA
PFMOAA
PMPA
Total Table 3+
17 Compounds)
Year
Range
Median
Range
Median
Range
Median
Range
Median
2022
0 — 6.6
ND
0 - 27
ND
0-17
ND
0 — 56
7.1
2023
0 — 12
2.1
0 - 27
ND
0 — 43
ND
0 — 82
3.9
2024
0 — 6.1
ND
0 - 20
ND
ND
ND
0 - 40
ND
Note: ND — non -detect, not detected above the reporting limit.
These observations show that the Total Table 3+ (17 compounds) concentrations decreased in
2024, which corresponds to the first full year of operating the groundwater extraction and barrier
wall remedy.
3.6 Concentration Trends Over Time at Tar Heel
Figure 3 shows that the Total Table 3+ (17 compounds) concentration trends at the river transects
are consistent with Tar Heel, which consists of a much higher resolution of data over time. This
indicates that the PFAS concentrations at Tar Heel can provide an understanding of the PFAS
concentrations at the river transects.
The rolling four -quarter average concentrations for Total Table 3+ (17 compounds) and the three
PFAS indicator compounds (HFPO-DA, PFMOAA, and PMPA) were calculated to evaluate the
concentration trends at Tar Heel over a quarterly basis. A rolling four -quarter average
concentration captures the dynamics and inherent variability among river flows, and weather
conditions (i.e., rainfall), which is well represented within a four -quarter timeframe. Starting with
Q 12022 (which corresponds to four quarters after the end of the Tar Heel sampling baseline period
[Q2 2020 through Q1 2021]), these quarterly concentrations were averaged from the preceding
three quarters to calculate a rolling four -quarter PFAS average concentrations.
Using the mass assessment datasets from Tar Heel, the rolling four -quarter average concentrations
are either reducing over time or relatively consistent at low concentrations. Prior to the
groundwater extraction (Q1 2023), the concentrations had decreased to a range from 74 ng/L to 35
ng/L, due to the remedies that have been implemented at the Site. After the groundwater extraction
and barrier wall remedy had been fully operating (Q3 2023), the concentrations continued to
reduce and ranged from 22 to 28 ng/L. In addition, the last reported four -quarter average
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concentrations for HFPO-DA (2.9 ng/L), PFMOAA (7.0 ng/L), and PMPA (6.1 ng/L) were either
lower than historic values or already at low concentrations.
These results are presented in Figure 4 and summarized in in -text table below.
Rolling Four-
Quarter Period
Rolling Four Quarter Average Concentration (ng/L)
HFPO-DA
PFMOAA
PMPA
Total Table 3+
(17 Compounds)
Q2 2021 to Q1 2022
11.6
23.6
18.0
74.0
Q3 2021 to Q2 2022
8.7
16.4
11.9
54.6
Q4 2021 to Q3 2022
7.4
14.8
6.4
44.0
12022 to Q4 2022
6.3
12.9
3.6
35.7
2 2022 to Ql 2023
6.9
12.0
3.6
34.5
3 2022 to Q2 2023
6.4
9.7
3.5
29.3
Q4 2022 to Q3 2023
6.0
8.6
4.9
27.5
1 2023 to Q4 2023
6.0
8.0
6.2
27.5
2 2023 to Ql 2024
4.4
7.9
5.9
24.9
3 2023 to Q2 2024
3.9
8.4
7.0
26.0
4 2023 to Q3 2024
2.9
7.0
6.1
21.9
Note: The Four -Quarters includes the preceding three quarters.
Evaluating the data collected at Tar Heel using the rolling four -quarter average concentrations
show that the Total Table 3+ (17 compounds) concentrations have been decreasing since the
operation of the groundwater extraction and barrier wall remedy.
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4 PFAS MASS DISCHARGE CALCULATIONS
To evaluate loading at the river transects, the analytical results from the river transect and the flows
reported from W.O. Huske Dam (Station #2105500) were used to estimate the mass discharge for
the three PFAS indicator compounds and Total Table 3+ (17 compounds). Specifically, the mass
discharge is calculated as the product of the concentration of PFAS and the volumetric flow rate
(reported in mg/s).
Mass discharge is a robust method to understand loading to the river since concentration values
can be significantly influenced by variations in river flows. The mass discharge results of the PFAS
indicator compounds (HFPO-DA, PFMOAA, and PMPA) and Total Table 3+ (17 compounds) at
the river transects are provided in Table 5. The Total Table 3+ (17 compounds) mass discharge
results over time at Tar Heel3 and the river transects are plotted in Figure 3.
4.1 Mass Discharge Over Time at River Transects
Figure 2 presents the box and whisker plots of the Total Table 3+ (17 compounds) mass discharge
at the river transects grouped by sampling year (2022 through 2024). Similar to the concentration
trends, the highest Total Table 3+ (17 compounds) mass discharges decreased in 2024 (1.3 mg/s)
compared to previous years (2.3 mg/s to 2.7 mg/s; Geosyntec 2023a; 2024a), which corresponds
to the first complete year of both groundwater extraction and barrier wall remedy were fully
operating. The Total Table 3+ (17 compounds) mass discharge decreased since operating the
groundwater extraction and barrier wall remedy.
The in -text table below summarizes the river transects mass discharge by year.
Mass Discharge Ranges and Median By Year (mg/s)
Year
HFPO-DA
PFMOAA
PMPA
Total Table 3+ (17 Compounds)
Range
Median
Range
Median
Range
Median
Range
Median
2022
0-0.40
0
0-1.2
0
0-1.2
0
0-2.7
0.20
2023
0-0.69
0.06
0— 1.4
0
0— 1.6
0
0-2.3
0.20
2024
0-0.20
0
0— 0.67
0
0
0
0— 1.3
0
Note: A mass discharge of 0 mg/s indicates that all the compounds were not detected above the reporting limit.
The mass discharge values at the river transects also fall within the range observed at Tar Heel,
indicating a consistent relationship between the river transect and Tar Heel datasets.
3 The analytical results and mass discharge calculations in the Tar Heel, from January through November 2024,
have been reported in the quarterly Cape Fear River PFAS Mass Loading Assessment Reports (Geosyntec: 2024b;
2024c; and 2024d). Tar Heel results from the fourth quarter 2023 (October 2024 through December 2024) will
be provided in the Cape Fear River PFAS Mass Loading Assessment — Fourth Quarter 2024 Report, which is due
to DEQ on March 31, 2025.
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4.2 Mass Loads Over Time at Tar Heel
The mass loads estimated at the Cape Fear River are reported in the quarterly mass assessment
reports (Geosyntec, 2024b; 2024c; and 2024d), which is calculated as a product of the mass
discharge within a sampling time interval (pounds [lbs]).
Using the mass loads calculated for each time interval, the rolling four -quarter sum mass loads for
Total Table 3+ (17 compounds) were calculated to evaluate the mass loads at Tar Heel over a
quarterly basis. Similar to the rolling four -quarter average concentration, the rolling four -quarter
total mass loads allows for a quarterly cadence of evaluating Total PFAS mass load reductions
over time. This metric also captures the dynamics and inherent variability among river flows, and
weather conditions (i.e., rainfall), which is well represented within a four -quarter timeframe. The
in -text table below, which was also presented in the Cape Fear River PFAS Mass Loading
Assessment — Third Quarter 2024 Report (Geosyntec, 2024d), shows that the rolling four quarter
sum of Total Table 3+ (17 compounds) mass loads at the Cape Fear River have been reducing
from the baseline load over time. Prior to the groundwater extraction (Q1 2023), the total in -river
load had been reduced to between 167 lbs to 373 lbs (or 61% to 82% from the baseline load), due
to the onsite remedies that were in place. After the groundwater extraction and barrier wall remedy
have been fully operating (Q3 2023), loads are further reduced to between 99 lbs to 138 lbs per
rolling 12-month period (or 85% to 90% from the baseline load).
Evaluating the data collected at Tar Heel using the rolling total four -quarter loads show that the
Total Table 3+ (17 compounds) mass loads have been decreasing since the implementation of
onsite remedies, and that the highest percent reductions have been achieved during quarters with
the groundwater extraction system and barrier wall remedies fully operating.
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Rolling
Sum of Total Table 3+
Percent
Operation Status of Groundwater
Four-
(17 Compounds)
Reduction from
Extraction and Barrier Wall Remedy
Quarter
Rolling Four- Quarters
Baseline
During the Four -Quarter Period
Period
River Mass Load lbs
Q2 2020 to
Q 12021
947
--
• Not operation
(Baseline)*
Q2 2021** to
373
61%
• Not operation
Q 1 2022
Q3 2021 to
2 2022
237
75%
• Not operation
Q4 2021 to
Q3 2022
171
82%
• Not operation
Q1 2022 to
4 2022
167
82%
• Not operation
Q2 2022 to
146
85%
• Groundwater extraction system began
Q 1 2023
operating on March 14, 2023
• Groundwater extraction system operated
Q3 2022 to
138
85%
for one quarter (Q2 2023)
Q2 2023t
• Barrier wall remedy was completed on
June 11, 2023
• Groundwater extraction system operated
Q4 2022 to
139
85%
for one quarter (Q2 2023)
Q3 2023
• Both remedies operated for one quarter
Q3 2023
• Groundwater extraction system operated
Q1 2023 to
130
86%
for one quarter (Q2 2023)
Q4 2023
• Both remedies operated for two quarters
3 and Q4 2023
• Groundwater extraction system operated
Q2 2023 to
103
89%
for one quarter (Q2 2023)
Q 12024
• Both remedies operated for three quarters
Q3 2023 to Q 1 2024
Q3 2023 to
2 2024
99
90%
• Both remedies operated for all 4 quarters
Q4 2023 to
3 2024tt
116
88%
• Both remedies operated for all 4 quarters
Notes:
* Outfall 003 and Seep C FTC were installed during baseline period
** Seeps A to D FTCs and Outfall 002 SWTS were all installed by June 24, 2021
t Seep ex -situ capture systems were installed on April 20, 2023
tt Q3 2024 experienced extremely high river volumes due to tropical storms (e.g., Tropical Storm Debby)
(Geosyntec, 2024d)
TR1287 -Cape Fear River HAS Outfall 004 NPDES River Transect Monitoring- 2024 Report 13 January 2025

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
5 REQUEST TO DISCONTINUE TRANSECT SAMPLING
Sections 3 and 4 presented lines of evidence that demonstrate that the PFAS concentrations and
loads in the Cape Fear River are reduced (at the river transects and Tar Heel) since the
implementation of the groundwater extraction and barrier wall remedy. The evaluation of
concentrations, mass discharges, and mass loads at the river transects (Table 6) and at Tar Heel
show that PFAS has been reducing over time. The reduction is due to the multiple remedies that
Chemours has installed to capture PFAS at the Site and to prevent PFAS from reaching the Cape
Fear River, which includes the Seeps Flow -through cells, 004 Groundwater Treatment Plant,
Outfall 003 System, and Stormwater Treatment System.
In addition, the concentration and mass discharges estimated at the river transect are within the
range at Tar Heel. Since sampling at Tar Heel shall continue twice per week pursuant to the
requirements of paragraphs 1(a) and 1(b) of the Addendum to Consent Order paragraph 12 (CO
Addendum), additional sampling at the river transects would not give any new information on the
PFAS concentrations at the Cape Fear River.
The Permit states that sampling at the river transects shall continue until NCDEQ approves a
reduction. Since reductions at the river transects have been documented as required by the Permit,
Chemours requests to discontinue the river transect monitoring specified in Section A.(7.) of the
Permit. Chemours will continue to monitor the Cape Fear River at Tar Heel pursuant of paragraphs
1(a) and 1(b) of the COA.
TR1287 -Cape Fear River PFAS Outfall 004 NPDES River Transect Monitoring- 2024 Report 14 January 2025

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
6 SUMMARY AND CONCLUSIONS
The 2024 Outfall 004 NPDES Permit River Transect sampling program monitored indicator and
Table 3+ PFAS at four river transects along the Cape Fear River. Samples were collected every
quarter (March, May, September, and November 2024). Over 2024 both the concentrations and
mass discharge values have decreased this year compared to 2022 and 2023, indicating that the
groundwater extraction and barrier wall remedy have been effective to reduce PFAS from entering
the Cape Fear River.
The concentrations and mass discharge values at the river transects were within the observed range
in the Cape Fear River at Tar Heel, which is a well -mixed downstream location at the Cape Fear
River and sampled twice weekly. The concentration and mass discharge trends also closely align
with Tar Heel, indicating consistency between the river transect and Tar Heel datasets.
As per Permit requirements, sampling will continue until NCDEQ approves a reduction. Given
that reductions in concentration and mass discharge are observed at the river transects, that
reductions of mass loads are observed at Tar Heel, and that sample results at the river transects are
consistent with Tar Heel, Chemours requests to discontinue river transect monitoring specified in
Section A.(7.) of the Permit. Chemours will continue to monitor the Cape Fear River at Tar Heel
pursuant of paragraphs 1(a) and 1(b) of the COA.
TR1287 -Cape Fear River PFAS Outfall 004 NPDES River Transect Monitoring- 2024 Report 15 January 2025

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
1all 01wD1► 011\["I
AECOM, 2018. Poly and Perfluoroalkyl Substance Quality Assurance Project Plan for the
Chemours Corporate Remediation Group. August 2018.
Geosyntec. 2018. Assessment of the Chemical and Spatial Distribution of PFAS in the Cape Fear
River. Chemours Fayetteville Works. September 17, 2018.
Geosyntec. 2020. Matrix Interference During Analysis of Table 3+ Compounds. Chemours
Fayetteville Works. June 30, 2020.
Geosyntec. 2023a. Cape Fear River PFAS Outfall 004 NPDES Permit River Transect Monitoring
- 2022 Report, Chemours Fayetteville Works. January 27, 2023.
Geosyntec 2023b. Cape Fear River PFAS Mass Loading Assessment — Third Quarter 2023 Report,
Chemours Fayetteville Works. December 22, 2023.
Geosyntec. 2024a. Cape Fear River PFAS Outfall 004 NPDES Permit River Transect Monitoring
- 2023 Report, Chemours Fayetteville Works. January 29, 2024.
Geosyntec 2024b. Cape Fear River PFAS Mass Loading Assessment — First Quarter 2024 Report,
Chemours Fayetteville Works. June 28, 2024.
Geosyntec 2024c. Cape Fear River PFAS Mass Loading Assessment — Second Quarter 2024
Report, Chemours Fayetteville Works. September 27, 2024.
Geosyntec 2024d. Cape Fear River PFAS Mass Loading Assessment — Third Quarter 2024 Report,
Chemours Fayetteville Works. December 20, 2024.
TR1287 -Cape Fear River HAS Outfall 004 NPDES River Transect Monitoring- 2024 Report 16 January 2025

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Tables
TRI287 - Capc F-, Rivcr PFAS Outfall 004 NPDES Rivcr Transco Monironng-2024 Rcport

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Geosyntec Consultants of NC, P.C.
TABLE 1
TRANSECT AND SAMPLING LOCATIONS
Chemours Fayetteville Works, North Carolina
Transect
Description of Transect Location
Sampling Location
Location ID
Riverbank Section'
Transect 1
North of Willis Creek
Station 101
T1-101
West
Station 102
T1-102
Center
Station 103
T1-103
East
Transect 2
Adjacent to Site
Station 201
T2-201
West
Station 202
T2-202
Center
Station 203
T2-203
East
Transect 3
Between William O Huske Dam and Outfall 002
Station 301
T3-301
West
Station 302
T3-302
Center
Station 303
T3-303
East
Transect 4
Downstream of Outfall 003 and Georgia Branch
Creek
Station 401
T4-401
West
Station 402
T4-402
Center
Station 403
T4-403
East
Notes:
1. All samples were collected at the middle depth of the river.
TR1287 Page 1 of 1 January 2025

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-70B31 CBCE6DD
TABLE 2
RIVER TRANSECT SAMPLES - FIELD PARAMETERS (2024)
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sampling Event
Location ID
Sample ID
Date
Time
Temperature
oC
( )
Dissolved
Oxygen
(mg/L)
pH (S.U.)
Turbidity
TU )
Oxidation
Reduction
Potential (mV)
Specific
Conductivity
(µS/cm)
T1-101
004RT0324-T1-101-031224
3/12/2024
10:00
14.3
9.78
7.18
30.4
79.3
187.79
T1-102
004RT0324-T1-102-031224
3/12/2024
10:30
18.23
9.48
7.45
1 40.6
141.1
141.37
T1-103
004RT0324-T1-103-031224
3/12/2024
11:00
13.45
9.24
7.4
42.4
151.5
108.95
T2-201
004RT0324-T2-201-031224
3/12/2024
11:55
20.31
9.32
7.22
36.9
159.1
134.11
T2-202
004RT0324-T2-202-031224
3/12/2024
12:20
18.5
9.25
7.22
50.6
175.2
122.18
2024
T2-203
004RT0324-T2-203-031224
3/12/2024
12:50
17.75
9.21
7.27
41.6
178.7
91.66
March
T3-301
004RT0324-T3-301-031224
3/12/2024
13:20
19.14
9.23
7.07
38.8
171.5
105.05
T3-302
004RT0324-T3-302-031224
3/12/2024
13:50
18.31
9.09
7.35
48.1
169.6
1 86.35
T3-303
004RT0324-T3-303-031224
3/12/2024
14:10
17.46
9.19
7.09
42.2
176.7
86.73
T4401
004RT0324-T4-401-031224
3/12/2024
15:15
18.81
9.39
7.02
46.8
150.4
102.17
T4-402
004RT0324-T4-402-031224
3/12/2024
15:35
17.13
9.29
7.02
50.8
164.8
96.91
T4403
004RT0324-T4-403-031224
3/12/2024
16:05
17.42
9.2
7.19
45.5
165.2
88.18
T1-101
004RT0524-T1-101-050124
5/l/2024
12:50
28.86
7.87
7.22
9.48
120.1
112.53
T1-102
004RT0524-T1-102-050124
5/l/2024
12:30
27.66
8.06
7.26
8.58
113.9
1 120.6
T1-103
004RT0524-T1-103-050124
5/l/2024
12:15
27.1
8.1
7.4
10.2
88
211.65
T2-201
004RT0524-T2-201-050124
5/l/2024
14:15
26.99
8.02
7.24
9.18
120.4
110.9
T2-202
004RT0524-T2-202-050124
5/l/2024
14:00
26.79
7.72
7.21
8.32
114.1
111.62
2024
T2-203
004RT0524-T2-203-050124
5/l/2024
13:45
27.02
8.26
7.47
9.45
93.3
125.34
May
T3-301
004RT0524-T3-301-050124
5/l/2024
15:15
28.65
8.18
7.31
10.4
130.2
121.01
T3-302
004RT0524-T3-302-050124
5/l/2024
15:00
25.73
8
7.21
8.94
136.1
1 111.77
T3-303
004RT0524-T3-303-050124
5/l/2024
14:45
26.78
7.83
6.99
10.9
150.3
121.6
T4-401
004RT0524-T4-401-050124
5/l/2024
16:30
29.75
8.34
7.09
8.36
131.1
119.72
T4-402
004RT0524-T4-402-050124
5/l/2024
16:45
27.92
8.56
7.19
7.61
159.7
112.24
T4-403
004RT0524-T4-403-050124
5/l/2024
16:55
29.02
8.47
7.21
8.32
130.1
111.43
T1-101
004RT0924-T1-101-090424
9/4/2024
9:00
25.14
6.87
6.78
22.1
187.7
98.25
T1-102
004RT0924-T1-102-090424
9/4/2024
9:20
24.83
7.46
6.96
22.6
218
1 155.14
T1-103
004RT0924-T1-103-090424
9/4/2024
9:40
24.53
7.74
7.14
34.7
175.4
99.27
T2-201
004RT0924-T2-201-090424
9/4/2024
10:15
25.54
6.9
6.98
22
187.2
108.4
T2-202
004RT0924-T2-202-090424
9/4/2024
10:20
25.69
6.89
7.13
21.7
169.6
94.09
September 2024
T2-203
004RT0924-T2-203-090424
9/4/2024
10:35
25.29
7.03
7.12
20.3
173.7
93.97
T3-301
004RT0924-T3-301-090424
9/4/2024
10:55
25.55
7.12
6.94
22.1
184.1
116.18
T3-302
004RT0924-T3-302-090424
9/4/2024
11:05
25.54
7.12
7.16
17.3
156.5
1 93.75
T3-303
004RT0924-T3-303-090424
9/4/2024
11:15
26.06
1 7.19
1 7.32
1 22.7
152.5
96.04
T4-401
004RT0924-T4-401-090424
9/4/2024
13:40
27.83
7.33
7.06
24.7
185
121.03
T4402
004RT0924-T4402-090424
9/4/2024
13:55
28.25
7.14
7.11
27.3
184.4
99.35
T4-403
004RT0924-T4403-090424
9/4/2024
14:05
28.63
7.13
7.16
26.5
141.9
93.8
TR 1287 Page 1 of 2 January 2025

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-70B31 CBCE6DD
TABLE 2
RIVER TRANSECT SAMPLES - FIELD PARAMETERS (2024)
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sampling Event
Location ID
Sample ID
Date
Time
Temperature
oC
( )
Dissolved
Oxygen
(mg/L)
pH (S.U.)
Turbidity
TU )
Oxidation
Reduction
Potential (mV)
Specific
Conductivity
(µS/cm)
T1-101
004RT1124-T1-101-111324
11/13/2024
8:30
14
10.15
7.72
8.94
-19.5
189.17
T1-102
004RTI124-T1-102-111324
11/13/2024
9:05
13.76
10.56
7.68
1 8.92
21
117.41
T1-103
004RTI124-T1-103-111324
11/13/2024
9:20
14.07
9.14
8.1
8.86
64.8
104.2
T2-201
004RTI124-T2-201-111324
11/13/2024
11:40
18.75
8.45
7.22
10.3
-9.4
169.91
T2-202
004RTI124-T2-202-111324
11/13/2024
11:55
19.08
8.41
7.49
9.37
23.9
123.7
November 2024
T2-203
004RTI124-T2-203-111324
11/13/2024
12:15
20.41
8.04
7.49
8.45
47.1
125.47
T3-301
004RTI124-T3-301-111324
11/13/2024
12:40
19.8
7.97
7.51
7.9
4.7
165.14
T3-302
004RTI124-T3-302-111324
11/13/2024
12:55
19.52
8.17
7.53
7.19
-25.6
126.92
T3-303
004RTI124-T3-303-111324
11/13/2024
13:15
20.53
8.32
7.6
8.6
52.7
129.16
T4401
004RTI124-T4-401-111324
11/13/2024
15:30
17.27
9.64
6.9
7.99
1.9
147.27
T4402
004RTI124-T4-402-111324
11/13/2024
15:45
17.31
9.33
7.31
9.75
22
124.39
T4403
004RTI124-T4-403-111324
11/13/2024
15:55
16.99
9.73
7.37
8.43
33.7
113.88
Notes:
°C - degrees Celsius
mg/L - milligrams per liter
µS/cm - microsiemens per centimeter
mv- millivolts
NTU - Nephelometric Turbidity Units
S.U. - Standard Units
TR1287 Page 2 of 2 January 2025

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-70B31 CBCE6DD
TABLE 3 Geosyntec Consultants of NC, P.C.
ANALYTICAL LIST (2024)
Chemours Fayetteville Works, North Carolina
Analytical Method
Common Name
Chemical Name
CASRN
Chemical
Formula
HFPO-DA
Hexafluoropropylene oxide dimer acid
13252-13-6
C6HF11O3
PMPA
Perfluoro-2-methoxypropionic acid
13140-29-9
C4HF7O3
PFMOAA
Perfluoro-2-methoxyacetic acid
674-13-5
C3HF5O3
PEPA
Perfluoro-2-ethoxypropionic acid
267239-61-2
C5HF9O3
PFECA-G
Perfluoro-4-isopropoxybutanoic acid
801212-59-9
C12H9F9O3S
PFO2HxA
Perfluoro-3,5-dioxahexanoic acid
39492-88-1
C4HF7O4
PFO3OA
Perfluoro-3,5,7-trioxaoctanoic acid
39492-89-2
C5HF9O5
PFO4DA
Perfluoro-3,5,7,9-tetraoxadecanoic acid
39492-90-5
C6HF11O6
Hydro -EVE Acid
2,2,3,3-tetrafluoro-3-({1,1,1,2,3,3-hexafluoro-3-[(1,2,2,2-
tetrafluoroethyl)oxy]propan-2-yl]oxy)propionic acid
773804-62-9
C8H2F14O4
EVE Acid
2,2,3,3-tetrafluoro-3-({1,1,1,2,3,3-hexafluoro-3-[(1,2,2-
trifluoroethenyl)oxy]propan-2-yl]oxy)propionic acid
69087-46-3
C8HF13O4
PFECA B
Perfluoro-3,6-dioxaheptanoic acid
151772-58-6
C5HF9O4
R-EVE
Pentanoic acid, 4-(2-carboxy- 1, 1,2,2-tetrafluoroethoxy)-
2,2,3,3,4,5,5,5-octafluoro
2416366-22-6
C8H2F12O5
PFO5DA
Perfluoro-3,5,7,9,1 1 -pentaoxadodecanoic acid
39492-91-6
C7HF13O7
Table 3+Lab SOP
R-PSDA (Byproduct 4)
Pentanoic acid, 2,2,3,3,4,5,5,5-octafluoro-4-(1,1,2,2-
tetrafluoro-2-sulfoethoxy)
2416366-18-0
C7H2F12O6S
R-PSDCA (Byproduct 6)
Ethanesulfonic acid, 1,1,2,2-tetrafluoro-2-[1,2,2,3,3-
pentafluoro- l-(trifluoromethyl)propoxy]
2416366-21-5
C6H2F12O4S
Hydrolyzed PSDA (Byproduct 5)
Acetic acid, 2-fluoro-2-[1,1,2,3,3,3-hexafluoro-2-(1,1,2,2-
tetrafluoro-2-sulfoethoxy)propoxy]
2416366-19-1
C7H3F11O7S
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-
1132933-86-8
C4H2F8O4S
tetrafluoro-2-sulfoethoxy)-1,2,2,2-tetafluoroethane
PES
Perfluoro-2-ethoxyethanesulfonic acid
113507-82-7
C4HF9O4S
Ethanesulfonic acid, 2-[1-[difluoro[(1,2,2-
PS Acid (Byproduct 1)
trifluoroethenyl)oxy]methyl]-1,2,2,2-tetrafluoroethoxy]-
29311-67-9
C7HF13O5S
1,1,2,2-tetrafluoro
Ethanesulfonic acid, 2- [ 1 - [difluoro(1,2,2,2-
Hydro-PS Acid (Byproduct 2)
tetrafluoroethoxy)methyl]-1,2,2,2-tetrafluoroethoxy]-1,1,2,2
749836-20-2
C7H2F14O5S
tetrafluoro
Notes:
CASRN - Chemical Abstracts Service registry number
EPA - Environmental Protection Agency
PFAS - per- and polyfluoroalkyl substances
SOP - Standard Operating Procedure
TR1287 Page 1 of 1 January 2025

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
TABLE 4A Geosyntec Consultants of NC, P.C.
RIVER TRANSECT SAMPLES - ANALYTICAL RESULTS (MARCH 2O24)
Chemours Fayetteville Works, North Carolina
Location ID
T1-101
T1-102
T1-103
T1-103
T2-201
T2-202
T2-203
Field Sample ID
004RT0324-T1-101-
031224
004RT0324-T1-102-
031224
004RT0324-T1-103-
031224
004RT0324-T1-103-
031224-D
004RT0324-T2-201-
031224
004RT0324-T2-202-
031224
004RT0324-T2-203-
031224
Sample Date
3/12/2024
3/12/2024
3/12/2024
3/12/2024
3/12/2024
3/12/2024
3/12/2024
QA/QC
Field Duplicate
Sample Delivery Group (SDG)
320-110489-1
320-110489-1
320-110489-1
320-110489-1
320-110489-1
320-110489-1
320-110489-1
Lab Sample ID
320-110489-1
320-110489-2
320-110489-3
320-110489-4
320-110489-5
320-110489-6
320-110489-7
Table 3+ SOP (ngE)
Hf o Dimer Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PFMOAA
<2.0
<2.0
PF02HxA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PF030A
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PF04DA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PF05DA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PMPA
<10
<10
<10
<10
<10
<10
<10
PEPA
<10
<10
<10
<10
<10
<10
<10
PS Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Hydro -PS Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
R-PSDA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Hydrolyzed PSDA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
R-PSDCA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
NVHOS, Acid Form
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
EVE Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Hydro -EVE Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
R-EVE
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluoro(2-ethoxyethane)sulfonic Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PFECA B
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PFECA-G
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Total Table 3+ (17 compounds)"'
ND
ND
ND
ND
ND
ND
ND
Total Table 3+ (20 compounds)'
ND
ND
ND
ND
ND
ND
ND
Notes:
1 - Total Table 3+ was calculated including J qualified data but not
non -detect data. The total Table 3+ sum is rounded to two significant
figures.
2 - Total Table 3+ (17 Compounds) does not include R-PSDA,
Hydrolyzed PSDA and R-EVE.
Bold - Analyte detected above associated reporting limit.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting limit.
ND - No Table 3+ compounds were detected above their associated
reporting limits.
TR1287 Page 1 of 2 January 2025

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
TABLE 4A Geosyntec Consultants of NC, P.C.
RIVER TRANSECT SAMPLES - ANALYTICAL RESULTS (MARCH 2O24)
Chemours Fayetteville Works, North Carolina
Location ID
T3-301
T3-302
T3-303
T4-401
T4-402
T4-403
EB
Field Sample ID
004RT0324-T3-301-
031224
004RT0324-T3-302-
031224
004RT0324-T3-303-
031224
004RT0324-T4-401-
031224
004RT0324-T4-402-
031224
004RT0324-T4-403-
031224
004RT0324-EB-031324
Sample Date
3/12/2024
3/12/2024
3/12/2024
3/12/2024
3/12/2024
3/12/2024
3/13/2024
QA/QC
Equipment Blank
Sample Delivery Group SDG)
320-110489-1
320-110489-1
320-110489-1
320-110489-1
320-110489-1
320-110489-1
320-110489-1
Lab Sample ID
320-110489-8
320-110489-9
320-110489-10
320-110489-11
320-110489-12
320-110489-13
320-110489-14
Table 3+ SOP (ngE)
Hf o Dimer Acid
<2.0
<2.0
<2.0
<2.0
<2.0
2.2
<2.0
<2.0
<2.0
<2.0
PFMOAA
<2.0
<2.0
<2.0
<2.0
PF02HxA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PF030A
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PF04DA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PF05DA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PMPA
<10
<10
<10
<10
<10
<10
<10
PEPA
<10
<10
<10
<10
<10
<10
<10
PS Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Hydro -PS Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
R-PSDA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Hydrolyzed PSDA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
R-PSDCA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
NVHOS, Acid Form
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
EVE Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Hydro -EVE Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
R-EVE
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluoro(2-ethoxyethane)sulfonic Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PFECA B
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PFECA-G
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Total Table 3+ (17 compounds)"2
ND
ND
NO
2.2
NO
ND
NO
Total Table 3+ (20 compounds)'
NO
NO
NO
2.2
NO
NO
NO
Notes:
1 - Total Table 3+ was calculated including J qualified data but not
non -detect data. The total Table 3+ sum is rounded to two significant
figures.
2 - Total Table 3+ (17 Compounds) does not include R-PSDA,
Hydrolyzed PSDA and R-EVE.
Bold - Analyte detected above associated reporting limit.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting limit.
ND - No Table 3+ compounds were detected above their associated
reporting limits.
TR1287 Page 2 of 2 January 2025

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
TABLE 4B Geosyntec Consultants of NC, P.C.
RIVER TRANSECT SAMPLES - ANALYTICAL RESULTS (MAY 2024)
Chemours Fayetteville Works, North Carolina
Location ID
T1-101
T1-102
T1-103
T1-103
T2-201
T2-202
T2-203
Field Sample ID
004RT0524-T1-101-
050124
004RT0524-T1-102-
050124
004RT0524-T1-103-
050124
004RT0524-T1-103-
050124-D
004RT0524-T2-201-
050124
004RT0524-T2-202-
050124
004RT0524-T2-203-
050124
Sample Date
5/1/2024
5/1/2024
5/l/2024
5/1/2024
5/1/2024
5/1/2024
5/l/2024
QA/QC
Field Duplicate
Sample Deliver Group (SDG)
320-112042-1
320-112042-1
320-112042-1
320-112042-1
320-112042-1
320-112042-1
320-112042-1
Lab Sample ID
320-112042-4
320-112042-3
320-112042-1
320-112042-2
320-112042-7
320-112042-6
320-112042-5
Table 3+ SOP (ng/L)
Hfpo Dimer Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PFMOAA
<2.0
<2.0
<2.0
<2.0
4.8
<2.0
<2.0
PF02HxA
<2.0
<2.0
<2.0
<2.0
2.2
<2.0
<2.0
PF030A
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PF04DA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PF05DA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PMPA
<10
<10
<10
<10
<10
<10
<10
PEPA
<10
<10
<10
<10
<10
<10
<10
PS Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Hydro -PS Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
R-PSDA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Hydrolyzed PSDA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
R-PSDCA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
NVHOS, Acid Form
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
EVE Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Hydro -EVE Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
R-EVE
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluoro(2-ethoxyethane)sulfonic Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PFECA B
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PFECA-G
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Total Table 3+ 17 com ounds "2
ND
ND
ND
ND
7.0
ND
ND
Total Table 3+ 20 compounds)'
ND
ND
ND
ND
7.0
ND
ND
Notes:
1 - Total Table 3+ was calculated including J qualified data but not
non -detect data. The total Table 3+ sum is rounded to two significant
figures.
2 - Total Table 3+ (17 Compounds) does not include R-PSDA,
Hydrolyzed PSDA and R-EVE.
Bold - Analyte detected above associated reporting limit.
J - Analyte detected. Reported value may not be accurate or precise.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
-- - No data reported
< - Analyte not detected above associated reporting limit.
ND - No Table 3+ compounds were detected above their associated
reporting limits.
TR1287 Paget of 2 January 2025

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
TABLE 4B Geosyntec Consultants of NC, P.C.
RIVER TRANSECT SAMPLES - ANALYTICAL RESULTS (MAY 2024)
Chemours Fayetteville Works, North Carolina
Location ID
T3-301
T3-302
T3-303
T4-401
T4-402
T4403
Field Sample ID
004RT0524-T3-301-
050124
004RT0524-T3-302-
050124
004RT0524-T3-303-
050124
004RT0524-T4-401-
050124
004RT0524-T4-402-
050124
004RT0524-T4-403-
050124
Sample Date
5/1/2024
5/1/2024
5/l/2024
5/l/2024
5/1/2024
5/l/2024
QA/QC
Sample Deliver Group (SDG)
320-112042-1
320-112042-1
320-112042-1
320-112042-1
320-112042-1
320-112042-1
Lab Sample ID
320-112042-10
320-112042-9
320-112042-8
320-112042-13
320-112042-12
320-112042-11
Table 3+ SOP (n /L)
Hf o Dimer Acid
<2.0
2.6
2.2
6.1
4.8
4.2
PFMOAA
<2.0
7.6
4.8
20
13
10
PF02HxA
<2.0
3.4
2.8
8.9
5.9
5.4
PF030A
<2.0
<2.0
<2.0
2.3
<2.0
<2.0
PF04DA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PF05DA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PMPA
<10
<10
<10
<10
<10
<10
PEPA
<10
<10
<10
<10
<10
<10
PS Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Hydro -PS Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
R-PSDA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Hydrolyzed PSDA
<2.0
<2.0
<2.0
3.1 J
2.9 J
2.0 J
R-PSDCA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
NVHOS, Acid Form
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
EVE Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Hydro -EVE Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
R-EVE
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluoro(2-ethoxyethane)sulfonic Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PFECA B
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PFECA-G
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Total Table 3+ 17 com ounds "2
ND
14
9.8
37
24
20
Total Table 3+ 20 compounds)'
ND
14
9.8
40
27
22
Notes:
1 - Total Table 3+ was calculated including J qualified data but not
non -detect data. The total Table 3+ sum is rounded to two significant
figures.
2 - Total Table 3+ (17 Compounds) does not include R-PSDA,
Hydrolyzed PSDA and R-EVE.
Bold - Analyte detected above associated reporting limit.
J - Analyte detected. Reported value may not be accurate or precise.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
-- - No data reported
< - Analyte not detected above associated reporting limit.
ND - No Table 3+ compounds were detected above their associated
reporting limits.
TR1287 Page 2 of 2 January 2025

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
TABLE 4C Geosyntec Consultants of NC, P.C.
RIVER TRANSECT SAMPLES - ANALYTICAL RESULTS (SEPTEMBER 2024)
Chemours Fayetteville Works, North Carolina
Location ID
T1-101
T1-101
T1-102
T1-103
T2-201
T2-202
T2-203
Field Sample ID
004RT0904-T1-101-
090424
004RT0904-T1-101-
090424-D
004RT0904-T1-102-
090424
004RT0904-T1-103-
090424
004RT0904-T2-201-
090424
004RT0904-T2-202-
090424
004RT0904-T2-203-
090424
Sample Date
09/04/2024
09/04/2024
09/04/2024
09/04/2024
09/04/2024
09/04/2024
09/04/2024
QA/QC
Field Duplicate
Sample Delivery Group (SDG)
320-115204-1
320-115204-1
320-115204-1
320-115204-1
320-115204-1
320-115204-1
320-115204-1
Lab Sample ID
320-115204-1
320-115204-2
320-115204-3
320-1152044
320-115204-5
320-115204-6
320-115204-7
Table 3+ SOP (ng/L)
Hfpo Dimer Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PFMOAA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PF02HxA
<2.0
<2.0
<2.0
<2.0
2.0
<2.0
<2.0
PF030A
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PF04DA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PF05DA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PMPA
<10
<10
<10
<10
<10
<10
<10
PEPA
<10
<10
<10
<10
<10
<10
<10
PS Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Hydro -PS Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
R-PSDA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Hydrolyzed PSDA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
R-PSDCA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
NVHOS
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
EVE Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Hydro -EVE Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
R-EVE
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PES
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PFECA B
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PFECA-G
<2.0
< .
I < .
1 <2.0
< .
I <2.0
<2.0
Total Table 3+ (17 compounds)"'
ND
ND
ND
ND
2.0
ND
ND
Total Table 3+ (20 compounds)'
ND
ND
ND
ND
2.0
ND
ND
Notes:
1 - Total Table 3+ was calculated including J qualified data but not
non -detect data. The total Table 3+ sum is rounded to two significant
figures.
2 - Total Table 3+ (17 Compounds) does not include R-PSDA,
Hydrolyzed PSDA and R-EVE.
Bold - Analyte detected above associated reporting limit.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting limit.
ND - No Table 3+ compounds were detected above their associated
reporting limits.
TR1287 Page 1 of January 2025

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
TABLE 4C Geosyntec Consultants of NC, P.C.
RIVER TRANSECT SAMPLES - ANALYTICAL RESULTS (SEPTEMBER 2024)
Chemours Fayetteville Works, North Carolina
Location ID
T3-301
T3-302
T3-303
T4401
T4402
T4403
EB
Field Sample ID
004RT0904-T3-301-
090424
004RT0904-T3-302-
090424
004RT0904-T3-303-
090424
004RT0904-T4-401-
090424
004RT0904-T4402-
090424
004RT0904-T4403-
090424
004RT0904-EB-090424
Sample Date
09/04/2024
09/04/2024
09/04/2024
09/04/2024
09/04/2024
09/04/2024
09/04/2024
QA/QC
Equipment Blank
Sample Delivery Group (SDG)
320-115204-1
320-115204-1
320-115204-1
320-115204-1
320-115204-1
320-115204-1
320-115204-1
Lab Sample ID
320-115204-8
320-115204-9
320-115204-10
320-115204-11
320-115204-12
320-115204-13
320-115204-14
Table 3+ SOP (ng/L)
HfPo Dimer Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PFMOAA
2.1
<2.0
<2.0
3.2
2.1
<2.0
<2.0
PF02HxA
<2.0
<2.0
<2.0
2.7
<2.0
<2.0
<2.0
PF030A
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PF04DA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PF05DA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PMPA
<10
<10
<10
<10
<10
<10
<10
PEPA
<10
<10
<10
<10
<10
<10
<10
PS Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Hydro -PS Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
R-PSDA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Hydrolyzed PSDA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
R-PSDCA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
NVHOS
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
EVE Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Hydro -EVE Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
R-EVE
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PES
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PFECA B
1 <2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PFECA-G
<2.0
1 <2.0
1 <2.0
1 <2.0
1 <2.0
1 <2.0
1 <2.0
Total Table 3+ (17 compounds)"'
2.1
ND
ND
5.9
2.1
ND
ND
Total Table 3+ (20 compounds)'
2.1
ND
ND
5.9
2.1
ND
ND
Notes:
1 - Total Table 3+ was calculated including J qualified data but not
non -detect data. The total Table 3+ sum is rounded to two significant
figures.
2 - Total Table 3+ (17 Compounds) does not include R-PSDA,
Hydrolyzed PSDA and R-EVE.
Bold - Analyte detected above associated reporting limit.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting limit.
ND - No Table 3+ compounds were detected above their associated
reporting limits.
TR1287 Page 2 of 2 January 2025

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
TABLE 4D Geosyntec Consultants of NC, P.C.
RIVER TRANSECT SAMPLES - ANALYTICAL RESULTS (NOVEMBER 2024)
Chemours Fayetteville Works, North Carolina
Location ID
T1-101
T1-101
T1-102
T1-103
T2-201
T2-202
T2-203
Field Sample ID
004RT1124-T1-101-
111324
004RT1124-T1-101-
111324-D
004RT1124-T1-102-
111324
004RT1124-T1-103-
111324
004RT1124-T2-201-
111324
004RT1124-T2-202-
111324
004RT1124-T2-203-
111324
Sample Date
11/13/2024
11/13/2024
11/13/2024
11/13/2024
11/13/2024
11/13/2024
11/13/2024
QA/QC
Field Duplicate
Sample Deliver Group (SDG)
320-117074-1
320-117074-1
320-117074-1
320-117074-1
320-117074-1
320-117074-1
320-117074-1
Lab Sample ID
320-117074-1
320-117074-2
320-117074-3
320-1170744
320-117074-5
320-117074-6
320-117074-7
Table 3+PFAS (ng/L)
Hf o Dimer Acid
<2.0
<2.0
<2.0
<2.0
2.5
<2.0
2.6
PFMOAA
<2.0
<2.0
<2.0
<2.0
4.7
2.3
4.2
PF02HxA
<2.0
<2.0
<2.0
<2.0
3.7
2.3
3.5
PF030A
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PF04DA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PF05DA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PMPA
<10
<10
<10
<10
<10
<10
<10
PEPA
<10
<10
<10
<10
<10
<10
<10
PS Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Hydro -PS Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
R-PSDA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Hydrolyzed PSDA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
R-PSDCA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
NVHOS
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
EVE Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Hydro -EVE Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
R-EVE
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PES
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PFECA B
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PFECA-G
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Total Table 3+ (17 compounds)"'
ND
ND
NO
ND
11
4.6
10
Total Table 3+ (20 compounds)'
ND
ND
ND
ND
11
4.6
10
Notes:
1 - Total Table 3+ was calculated including J qualified data but not
non -detect data. The total Table 3+ sum is rounded to two significant
figures.
2 - Total Table 3+ (17 Compounds) does not include R-PSDA,
Hydrolyzed PSDA and R-EVE.
Bold - Analyte detected above associated reporting limit.
J - Analyte detected. Reported value may not be accurate or precise.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting limit.
ND - No Table 3+ compounds were detected above their associated
reporting limits.
TR1287 Page 1 of 2 January 2025

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
TABLE 4D Geosyntec Consultants of NC, P.C.
RIVER TRANSECT SAMPLES - ANALYTICAL RESULTS (NOVEMBER 2024)
Chemours Fayetteville Works, North Carolina
Location ID
T3-301
T3-302
T3-303
T4401
T4402
T4403
EB
Field Sample ID
004RT1124-T3-301-
111324
004RT1124-T3-302-
111324
004RT1124-T3-303-
111324
004RT1124-T4401-
111324
004RT1124-T4-402-
111324
004RT1124-T4403-
111324
004RT1124-EB-11324
Sample Date
11/13/2024
11/13/2024
11/13/2024
11/13/2024
11/13/2024
11/13/2024
11/13/2024
QA/QC
Equipment Blank
Sample Delivery Group (SDG)
320-117074-1
320-117074-1
320-117074-1
320-117046-1
320-117046-1
320-117046-1
320-117047-1
Lab Sample ID
320-117074-8
320-117074-9
320-117074-10
320-117046-1
320-117046-2
320-117046-3
320-117047-1
Table 3+PFAS (ng/L)
Hf o Dimer Acid
2.6
2.3
2.8
5.3
3.4
4.1
<2.0
PFMOAA
4.7
3.5
2.9
15
10
8.9
<2.0
PF02HxA
3.7
3.3
3.3
8.4
5.7
5.3
<2.0
PF030A
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PF04DA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PF05DA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PMPA
<10
<10
<10
<10
<10
<10
<10
PEPA
<10
<10
<10
<10
<10
<10
<10
PS Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Hydro -PS Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
R-PSDA
<2.0
<2.0
2.0 J
2.9 J
3.1 J
2.0 J
<2.0
Hydrolyzed PSDA
<2.0
<2.0
<2.0
3.1 J
3.0 J
2.9 J
<2.0
R-PSDCA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
NVHOS
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
EVE Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Hydro -EVE Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
R-EVE
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PES
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PFECA B
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PFECA-G
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Total Table 3+ (17 compounds)"'
11
9.1
9.0
29
19
18
ND
Total Table 3+ (20 compounds)'
11
9.1
11
35
25
23
ND
Notes:
1 - Total Table 3+ was calculated including J qualified data but not
non -detect data. The total Table 3+ sum is rounded to two significant
figures.
2 - Total Table 3+ (17 Compounds) does not include R-PSDA,
Hydrolyzed PSDA and R-EVE.
Bold - Analyte detected above associated reporting limit.
J - Analyte detected. Reported value may not be accurate or precise.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
< - Analyte not detected above associated reporting limit.
ND - No Table 3+ compounds were detected above their associated
reporting limits.
TR1287 Page 2 of 2 January 2025

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
TABLE 5 Geosyntec Consultants of NC, P.C.
RIVER TRANSECT SAMPLES - MASS DISCHARGE (2024)
Chemours Fayetteville Works, North Carolina
Sampling
Event
Location
Field Sample ID
Sample Date
TotalAnalytes
Flow (ft3/s)'
Mass Discharge
(mg/s)'
Total Table 3+
(17 compounds)'
HFPO-DA
PFMOAA
PMPA
T1-101
004RT0324-T1-101-031224
3/12/2024
20
9,520
0
0
0
0
T1-102
004RT0324-T1-102-031224
3/12/2024
20
9,630
0
0
0
0
T1-103
004RT0324-T1-103-031224
3/12/2024
20
9,750
0
0
0
0
c
T2-201
004RT0324-T1-I03-031224-D
3/12/2024
20
9,750
0
0
0
0
T2-201
004RT0324-T2-201-031224
3/12/2024
20
9,860
0
0
0
0
T2-202
004RT0324-T2-202-031224
3/12/2024
20
9,920
0
1 0
0
0
T2-203
004RT0324-T2-203-031224
3/12/2024
20
9,950
0
0
0
0
N
T3-301
004RT0324-T3-301-031224
3/12/2024
20
10,000
0
0
0
0
T3-302
004RT0324-T3-302-031224
3/12/2024
20
10,100
0
0
0
0
p,
T3-303
004RT0324-T3-303-031224
3/12/2024
20
10,100
0
0
0
0
T4-401
004RT0324-T4-401-031224
3/12/2024
20
10,200
0.64
0
0.64
0
T4-402
004RT0324-T4-402-031224
3/12/2024
20
10,200
0
0
0
0
T4-403
004RT0324-T4-403-031224
3/12/2024
20
10,300
0
0
0
0
T1-101
004RT0524-T1-101-050124
5/l/2024
20
1,170
0
0
0
0
T1-102
004RT0524-T 1 - 102-050124
5/l/2024
20
1,170
0
0
0
0
T1-103
004RT0524-T1-103-050124
5/l/2024
20
1,170
0
0
0
0
N
T1-103
004RT0524-T 1 - 103 -050124-D
5/l/2024
20
1,170
0
0
0
0
T2-201
004RT0524-T2-201-050124
5/l/2024
20
1,170
0.23
0
0.16
0
T2-202
004RT0524-T2-202-050124
5/l/2024
20
1,160
0
0
0
0
T2-203
004RT0524-T2-203-050124
5/l/2024
20
1,160
0
0
0
0
c
T3-301
004RT0524-T3-301-050124
5/l/2024
20
1,170
0
0
0
0
N
T3-302
004RT0524-T3-302-050124
5/l/2024
20
1,170
1 0.46
0.086
0.25
0
O'
T3-303
004RT0524-T3-303-050124
5/l/2024
20
1,180
0.33
0.074
0.16
0
T4-401
004RT0524-T4-401-050124
5/l/2024
20
1,180
1.3
0.20
0.67
0
T4-402
004RT0524-T4-402-050124
5/l/2024
20
1,180
0.9
0.16
0.43
0
T4-403
004RT0524-T4-403-050124
5/l/2024
20
1,180
0.7
0.14
0.33
0
Tl-101
004RT0904-T1-101-090424
9/4/2024
20
6,170
0
0
0
0
T1-101
004RT0904-T1-101-090424-D
9/4/2024
20
6,170
0
0
0
0
N
T1-102
004RT0904-T1-102-090424
9/4/2024
20
6,190
0
0
0
0
T1-103
004RT0904-T1-103-090424
9/4/2024
20
6,210
0
0
0
0
a
T2-201
004RT0904-T2-201-090424
9/4/2024
20
6,210
0.35
0
0
0
T2-202
004RT0904-T2-202-090424
9/4/2024
20
6,210
0
0
0
0
T2-203
004RT0904-T2-203-090424
9/4/2024
20
6,240
0
0
0
0
T3-301
004RT0904-T3-301-090424
9/4/2024
20
6,260
0.37
0
0.37
1 0
c
T3-302
004RT0904-T3-302-090424
9/4/2024
20
6,260
0
0
0
0
T3-303
004RT0904-T3-303-090424
9/4/2024
20
6,260
0
0
0
0
O'
T4-401
004RT0904-T4-401-090424
9/4/2024
20
6,380
1.1
0
0.58
0
T4-402
004RT0904-T4-402-090424
9/4/2024
20
1 6,380
0.38
0
0.38
0
T4-403
004RT0904-T4-403-090424
9/4/2024
20
6,380
0
0
0
0
T1-101
004RT1124-T1-101-111324
11/13/2024
20
1,250
0
0
0
0
T1-101
004RT1124-T1-101-111324-D
11/13/2024
20
1,250
0
0
0
0
N
T1-102
004RT1124-T1-102-111324
11/13/2024
20
1,270
0
0
0
0
T1-103
004RT1124-T1-103-111324
11/13/2024
20
1,270
0
0
0
0
a
T2-201
004RT1124-T2-201-111324
11/13/2024
20
1,290
0.40
0.091
1 0.17
0
£
T2-202
004RT I 124-T2-202-111324
11/13/2024
20
1,210
0,17
0
0,083
0
Z
T2-203
004RT1124-T2-203-111324
11/13/2024
20
1,280
1 0.36
0
0.15
0
T3-301
004RT1124-T3-301-111324
11/13/2024
20
1,280
0.40
0.09
0.17
0
c
T3-302
004RT1124-T3-302-111324
11/13/2024
20
1,280
0.33
0.083
0.13
0
T3-303
004RT1124-T3-303-111324
11/13/2024
20
1,290
0.33
0.10
0.11
0
T4-401
004RT1124-T4-401-111324
11/13/2024
20
1,280
1.1
0.19
0.54
0
T4-402
004RT I124-T4-402-111324
11/13/2024
20
1,280
0.69
0.12
0.36
0
T4-403
004RT1124-T4-403-111324
11/13/2024
20
1,280
0.65
0.15
0.32
0
Notes:
-- - not calculated
ft3/s - cubic feet per second
mg/s - milligrams per second
1 - Flow data are from the USGS gauging station #02105500 located at the W.O. Huske Dam.
2 - A mass discharge of 0 mg/s indicate that all the compounds were not detected above the reporting limit.
3 - The mass discharge for Total Table 3+ (17 compounds) was only calculated for months when the full list of Table 3+ (20 compounds) was analyzed.
TR1287 Page 3 of 3 January 2025

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
TABLE 6 Geosyntec Consultants of NC, P.C.
SUMMARY OF RIVER TRANSECTS CONCENTRATION AND MASS DISCHARGE BY YEAR
Chemours Fayetteville Works, North Carolina
Concentration (ng/L)
Mass Discharge (mg/s)l
Year
HFPO-DA
PFMOAA
PMPA
Total Table 3+
(17 compounds)
HFPO-DA
PFMOAA
PMPA
Total Table 3+
(17 compounds)
Range
Median
Range
Median
Range
Median
Range
Median
Range
Median
Range
Median
Range
Median
Range
Median
2022
0-6.6
ND
0-27
ND
0-17
ND
0-56
7.1
0-0.40
0
0-1.24
0
0-1.2
0
0-2.7
0.20
20232
0-12
2.1
0-27
ND
0-43
ND
0-82
3.9
0-0.69
0.06
0-1.4
0
0-1.6
0
0-2.3
0.20
2024
0-6.1
ND
0-20
ND
ND
ND
0-40
ND
0-0.20
0
0-0.67
0
0
0
0-1.3
0
Notes:
mg/s - milligrams per second
ng/L - nanograms per liter
ND - non -detect, the compound was not detected above the reporting limit
1 - A mass discharge of 0 mg/s indicate that all the compounds were not detected above the reporting limit.
2 - The concentration and mass discharge for Total Table 3+ (17 compounds) was only calculated for months when the full list of Table 3+ (20 compounds) was analyzed.
TR1287 Page 1 of 1 January 2025

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Figures
TRI287 - Capc F-, Rivcr HAS Outfall 004 NPDES Rivcr Transco M—it-mg-2024 Rcport

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
100 50 0 100 Feet
Sta1,2
Sta4tion1 n
1O Station
6
N
Wil/is
Creek
)3 Trans
U
1
NI .�► ✓J
1' IL
�p
7
t
r
T
100 50 0 100 Feet TransectB�
0
Lock and D
/ Lock and Dam SeeK
Station 303 -
� Station 301 �
CD
Station 302 11
-
v
CD I
1
100 50 0 100 Feet
100 50 0 100 Feet
Legend
1,000 500 0 1,000 Feet
❑ Site River Water Intake Location
Nearby Tributary
Q W.O. Huske Dam — — —
- Observed Seep
❑ Flow Through Cell
Site Boundary
Cape Fear River Transect
❑ Outfall 003 Treatment System
North Forcemain
Sampling Locations
O Station Sampling Location
South Forcemain
Chemours Fayetteville Works, North Carolina
Stormwater Treatment System
Barrier Wall
Transect Sampling Location ® 004 Groundwater Treatment Pad and Break Tank
Geosyntec`l=
Notes:
1. The outline of Cape Fear River is approximate and is based on open data from ArcGIS Online and North Carolina Department
GeosyntecConsultants ofNC,P.0
NC License No.: C 3500 and C 295
COriSUltaritS
Figure
of Environmental Quality Online GIS.
2. Basemap source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the
GIS User Community.
Raleigh
January 2025

Docusign Envelope ID: 1FCOFDFF-525E-4254-BED4-70B31CBCE6DD
140 ;
a
c
7 120
CL
O J
E
O 's 100 O
c
~ 80 O °: °
o v 60 ^ �O
CO:0
40 O (j' O O;O O
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6 �° h � �°
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20
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16
z3
c 14
7
O
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Con3 $
+ T) 6 i ❑8 6
M
O 0 ° •
4
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50,000
45,000
40,000
35,000
O
30,000 LL
25,000 >_
20,000
Q ❑ N
15,000 ILL
O O a)
10,000
U
5,000
0
T 5
a)
4
c
c
O
3 0
U
a)
2 0-
0 T
F__ 0 nn ^ ^ n ^ n n^n^nnn ^ " 0
\VV \VV \VV \V� \V� \VP) \V� \V� \V� \V� \V� \V� \V� \�'� \V� \`V� \V� \V� \V� \V�
^L ^� �� \"�� \^ \�j^ \^�� 4j\�j� co\�0 `\�0 \�b o,\V1 ^p\�1 `^\,� ^y�O ^\�� ��� ^,\�h �J 4j\�� ;6 `\rP) j\ o,\�
Total Daily Precipitation
O Tar Heel Composite Sample
Cape Fear River Flow
❑ Tar Heel Grab Sample
O River Transect 1 Sample
O River Transect 2 Sample
River Transect 3 Sample
O River Transect 4 Sample
Notes:
A concentration of 0 ng/L and mass discharge of 0 mg/s indicate that all
the compounds were not detected above the reporting limit.
Flow and precipitation data are from the USGS gauging station #02105500
located at the W.O. Huske Dam.
Abbrevations:
BW - Barrier Wall
ft3/s - cubic feet per second
GWEC - Groundwater extraction and conveyance system
mg/s - milligrams per second
ND - not detected above the detection limit
ng/L - nanograms per liter

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
-------------i
90
80
•
2024 is the first full I
J
70
i year that Groundwater
I Extraction and Barrier i
�-
60
° _
' Wall Remedy were fully
�
50
I I
i operating. I
4
40
'
�
U
30
•
I I
= I
C:
0
20
� I
10
a
I �
0
I �
3.0
I
2.5
�
E
I
I I
m
2.0
I i
CM
I I
c"
1.5
' I
U
o I
' I
0
1.0
°
o
I i
m
0.5
x
'
'
°
I
— -- — — — — — — — — — —�
❑ 2022 ■ 2023 ❑ 2024
Box and Whisker Plots of Total Table 3+ (17 Compounds)
Concentration and Mass Discharge at River Transects by Year
Notes:
mg/s - milligrams per second
Chemours Fayetteville Works, North Carolina
ng/L - nanograms per liter
- The mass discharge for Total Table 3+ (17 compounds) was only calculated for months when the full list of Table
3+ (20 compounds) was analyzed, which does not include R-PSDA, Hydrolyzed PSDA and R-EVE.
Geosyntec Figure
GeosyntecConsultants ofNC, P.0
consultants NC License No.: C-3500 and C-295
3
Raleigh January 2025

Docusign Envelope ID: 1FCOFDFF-525E-4254-BED4-70B31CBCE6DD
J
c' 70
C
O
cu 60
L
^C
W
c 50
O
U
m
�
40
m
Q 30
(D
20
L
O
IL 10
0)
C
ry
0 0
Groundwater Extraction System (March 14, 2023)
Barrier Wall Remedy (June 11, 2023)
i
i
I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
Lm U,1GJ
Q1 2022 Q2 2022 Q3 2022 Q4 2022 Q1 2023 Q2 2023 Q3 2023 Q4 2023 Q1 2024 Q2 2024 Q3 2024
End of Four -Quarters'
HFPO-DA ■ PFMOAA ■ PMPA Total Table 3+ (17 Compounds)
Notes:
ng/L - nanograms per liter
1 - The Four -Quarters includes the preceding three quarters.
2 - For 2023, the mass discharge for Total Table 3+ (17 compounds) was only calculated for months when the full
list of Table 3+ (20 compounds) was analyzed.
3 - Total Table 3+ (17 compounds) does not include R-PSDA, Hydrolyzed PSDA and R-EVE.
Four -Quarter Rolling Average Concentrations
Tar Heel by Quarter
Chemours Fayetteville Works, North Carolina
Geosyntecl'- GeosyntecConsultants ofNC, P.C.I Figure
consultants lic
ense cense No.: C-3500 and C-295
4
Raleigh January 2025

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Appendix A
Concentration Trend Figures
TRI287 - Capc F-, Rivcr PFAS Outfall 004 NPDES Rivcr Transco M—it-mg-2024 Rcport

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
30
25
20
c
5
I0II M
30
25
20
c
c
0
-M 15
L
U
U 10
5
ND
Transect 1 - North of Willis Creek
Flow: 9,630 cfs
Gage Height: 5.37 ft
West Sample Center Sample East Sample
(T1-101) (T1-102) (T1-103)
Transect 3 - Between W.O. Huske Dam and Outfall 002
Flow: 10,100 cfs
Gage Height: 5.53 ft
West Sample Center Sample East Sample
(T3-301) (T3-302) (T3-303)
Legend:
Notes:
■ HFPO-DA
cfs - cubic feet per second
11,000
• PFMOAA
ft-fee
NDt
-non-detect (see note 2)
* PMPA
ng/L - nanograms per liter
10,000
HFPO-DA - Hexafluoropropylene oxide dimer acid
PFMOAA - Perfluoro-2-methoxyacetic acid U
PMPA - Perfluoro-2-methoxypropionic acid -'
9,000
1. All samples along the river transects were collected at the middle depth of the river. 0
2. The reporting detection limits are: HFPO-DA: 2 ng/L; PFMOAA: 2 ng/L; and PMPA: 10 ng/L.
3. Gage height, total precipitation, and flow data are from the USGS gauging station #02105500 located at IL
8 000
the W.O. Huske Dam.
4. The gage height and flow posted on each graph corresponds to the sampling date and time that the
center sample was collected. The total precipitation represents the total from the start date and time to the
7 000
Ca
25
20
c
c
0
15
L
W
U
v 10
5
ND
30
25
20
c
0
15
L
y-+
U
U 10
5
ND
Transect 1
West Sample Center Sample East Sample
(T2-201) (T2-202) (T2-203)
Transect 4 - Downstream of Outfall 003 and Georgia Branch Creek
Flow: 10,200 cfs
Gage Height: 5.58 ft
West Sample Center Sample East Sample
(T4-401) (T4-402) (T4-403)
Transect 4
Transect 2 �- Transect 3
end date and time of the sampling event.
3/12/2024 0:00 3/12/2024 6:00 3/12/2024 12:00 3/12/2024 18:00 3/13/2024 0:00
Date and Time
Total Preciaitation: 0 inchesl

Docusian Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
30
25
20
c
5
ND
30
25
20
c
c
0
15
L
U
U 10
5
ND
Transect 1 - North of Willis Creek
Flow: 1,140 cfs
Gage Height: 1.41 ft
West Sample Center Sample East Sample
(T1-101) (T1-102) (T1-103)
Transect 3 - Between W.O. Huske Dam and Outfall 002
Flow: 1,140 cfs
Gage Height: 1.41 ft
West Sample Center Sample East Sample
(T3-301) (T3-302) (T3-303)
Legend:
Notes:
■ HFPO-DA
cfs - cubic feet per second
2,000
• PFMOAA
ft-fee
NDt
-non-detect (see note 2)
* PMPA
ng/L - nanograms per liter
1,800
HFPO-DA - Hexafluoropropylene oxide dimer acid
PFMOAA - Perfluoro-2-methoxyacetic acid
U 1,600
PMPA - Perfluoro-2-methoxypropionic acid
1. All samples along the river transects were collected at the middle depth of the river.
O
2. The reporting detection limits are: HFPO-DA: 2 ng/L; PFMOAA: 2 ng/L; and PMPA: 10 ng/L.
1,400
3. Gage height, total precipitation, and flow data are from the USGS gauging station #02105500 located at
IL
the W.O. Huske Dam.
1,200
4. The gage height and flow posted on each graph corresponds to the sampling date and time that the
center sample was collected. The total precipitation represents the total from the start date and time to the
1 000
Ca
25
20
c
c
0
15
L
W
U
v 10
5
ND
30
25
20
5
ND
West Sample Center Sample East Sample
(T2-201) (T2-202) (T2-203)
Transect 4 - Downstream of Outfall 003 and Georgia Branch Creek
Flow: 1,160 cfs
Gage Height: 1.42 ft
LAX LAX
West Sample Center Sample East Sample
(T4-401) (T4-402) (T4-403)
Transect 2 Transect 3
Transect 1 Transect 4
end date and time of the sampling event.
5/1/2024 0:00 5/1/2024 6:00
5/1/2024 12:00
Date and Time
5/1/2024 18:00 5/2/2024 0:00
Total PreciDitation: 0 inchesl

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
30
25
20
c
5
I0II M
30
25
20
c
c
0
—M 15
L
U
U 10
5
ND
Transect 1 - North of Willis Creek
Flow: 6,190 cfs
Gage Height: 4.06 ft
West Sample Center Sample East Sample
(T1-101) (T1-102) (T1-103)
Transect 3 - Between W.O. Huske Dam and Outfall 002
Flow: 6,260 cfs
Gage Height: 4.09 ft
West Sample Center Sample East Sample
(T3-301) (T3-302) (T3-303)
Legend:
Notes:
■ HFPO-DA
cfs - cubic feet per second
7,000
• PFMOAA
fl- feet
ND - non -detect (see note 2)
6,900
*PMPA
ng/L- nanogramsperliter
6,800
HFPO-DA- Hexafluoropropylene oxide dimer acid
6,700
PFMOAA - Perfluoro-2-methoxyacetic acid
6,600
PMPA - Perfluoro-2-methoxypropionic acid
6,500
1. All samples along the river transects were collected at the middle depth of the river.
O 6,400
2. The reporting detection limits are: HFPO-DA: 2 ng/L; PFMOAA: 2 ng/L; and PMPA: 10 ng/L.
3. Gage height, total precipitation, and flow data are from the USGS gauging station #02105500 located at
LL 6,300
the W.O. Huske Dam.
6,200
4. The gage height and flow posted on each graph corresponds to the sampling date and time that the
6,100
center sample was collected. The total precipitation represents the total from the start date and time to the
6 000
Ca
25
20
c
c
0
15
L
W
U
v 10
5
ND
30
25
20
c
0
15
L
y-+
U
U 10
Transect 1
5
ND
West Sample Center Sample East Sample
(T2-201) (T2-202) (T2-203)
Transect 4 - Downstream of Outfall 003 and Georgia Branch Creek
Flow: 6,380 cfs
Gage Height: 4.14 ft
West Sample Center Sample East Sample
(T4-401) (T4-402) (T4-403)
Transect 2 Transect 3
Transect 4
end date and time of the sampling event.
9/4/2024 0:00 9/4/2024 6:00 9/4/2024 12:00 9/4/2024 18:00 9/5/2024 0:00
Date and Time
Total Preciaitation: 0 inchesl

Docusian Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
30
25
20
c
5
ND
30
25
20
c
c
0
—M 15
L
U
U 10
5
ND
Transect 1 - North of Willis Creek
Flow: 1,270 cfs
Gage Height: 1.57 ft
West Sample Center Sample East Sample
(T1-101) (T1-102) (T1-103)
Transect 3 - Between W.O. Huske Dam and Outfall 002
Flow: 1,280 cfs
Gage Height: 1.58 ft
■ 1 ■
West Sample Center Sample East Sample
(T3-301) (T3-302) (T3-303)
Legend:
Notes:
■ HFPO-DA
cfs - cubic feet per second
3,000
• PFMOAA
ft-fee
NDt
-non-detect (see note 2)
*PMPA
ng/L- nanogramsperliter
2,500
HFPO-DA - Hexafluoropropylene oxide dimer acid
PFMOAA - Perfluoro-2-methoxyacetic acid U
PMPA - Perfluoro-2-methoxypropionic acid -
2,000
1. All samples along the river transects were collected at the middle depth of the river.
o
2. The reporting detection limits are: HFPO-DA: 2 ng/L; PFMOAA: 2 ng/L; and PMPA: 10 ng/L.
3. Gage height, total precipitation, and flow data are from the USGS gauging station #02105500 located at IL
1,500
the W.O. Huske Dam.
4. The gage height and flow posted on each graph corresponds to the sampling date and time that the
center sample was collected. The total precipitation represents the total from the start date and time to the
1 000
Ca
25
20
c
c
0
15
L
W
U
v 10
5
ND
30
25
20
c
0
15
L
y-+
U
U 10
Transect 1
5
ND
West Sample Center Sample East Sample
(T2-201) (T2-202) (T2-203)
Transect 4 - Downstream of Outfall 003 and Georgia Branch Creek
Transect 2
Flow: 1,280 cfs
Gage Height: 1.58 ft
LAX
West Sample Center Sample East Sample
(T4-401) (T4-402) (T4-403)
Transect 3
.,— Transect 4
end date and time of the sampling event.
11 /13/2024 0:00 11 /13/2024 6:00 11 /13/2024 12:00 11 /13/2024 18:00 11 /14/2024 0:00
Date and Time
Total PreciDitation: 0 inchesl

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Appendix B
Field Forms
TRI287 - Capc F-, Rivcr PFAS Outfall 004 NPDES Rivcr Transco M—it-mg-2024 Rcport

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemour5 Fayetteville
Samplers: ERIN JANIGA KEN STUART
Date: 03-12-2024
SURFACE WATER SAMPLING RECORD
Location ID: 101
Sampling Event: 004 Transact Sampling
Time.
Project Manager: Tracy Ovbey
Event Type: Sampling
Spi ID
S I Date Time
p.
DO
Redox
urbidi
Spec. Cond.
Temp.
Color
Odor
DA/OC
m /L
my
NTU
pS/cm
°G
004RT0324-T1-101
031224
03-12-202410:00
7.18
9.78
79.30
30.40
187.79
1430
Slight yellow,No
sI' htl haz
Sampling Data
Sampling Method: Peri Pump Grab
Sampling Location: River Right
Total Depth to Bottom of Channel (ft): 26.5
WEATHER CONDITIONS
Temperature (F):
Sky:
Wind (mph)
.00
LS�.nn.yPrecipdation: on
5
oil
Tubing Depth (ft): 13 Distance to River Right: 22
Multi Meter Used: Insitu Aqua Troll Distance to River Lett: 65
Multi Meter ID: 706720 Distance to River (Right/Left) Units: 0
Latitude: 34.8515458
Longitude:-78.8269711 Q
GPS Location if collected)
General Comments:
Sample Comments:
P PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemour5 Fayetteville
Samplers: ERIN JANIGA KEN STUART
Date: 03-12-2024
SURFACE WATER SAMPLING RECORD
Location ID: 102
Sampling Event: 004 Transact Sampling
Time.
Project Manager: Tracy Ovbey
Event Type: Sampling
Spi ID
S I Date Time
is.
DO
Redox
urbidi
Spec. Cond.
Temp.
Color
Odor
DA/OC
m /L
my
NTU
pS/cm
°G
[iiht
004RT0324-T1-102
031224
03-12-202410:30
7.45
9.48
141.10
40.60
141.37W18.23
ht haib
lbw
No
MS MS.
Sampling Data
Sampling Method: P. Pump Grab
Sampling Location: Center of River
Total Depth to Bottom of Channel (R): 26
WEATHER CONDITIONS
Temperature (F):
Sky:
Wind (mph)
.00
LS�.nnyPrecipdation: one
5
01
Tubing Depth (ft): 13 Distance to River Right: 45
Multi Meter Used: Insdu Aqua Troll Distance to River Left: 42
Multi Meter ID: 706720 Distance to River (Right(Left) Units: 0
Latitude: 34.8515695236934
Longitude:-78.8266917793033 Q
GPS Location (d collected)
General Comments:IN
1116.
Sample Comments:
left
P PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemours Fayetteville
Samplers: ERIN JANIGA KEN STUART
Date: 03-12-2024
SURFACE WATER SAMPLING RECORD
Location ID: 103
Sampling Event: 004 Transect Sampling
Time: 10:54
Project Manager: Tracy Ovbey
Event Type: Sampling
S I ID
S I Date Time
p.bDO
Redox
urbidi
SpewCond.
Temp.
Color
Odor
CA1QC
/LmV
NTU
u-m004RT0324-T-103-
031224
03-12-202411:00
7.404
151.50
42.40
108.95
1345
Slightlyhazy,
sI' htl Ilow
No
CUP
Semolina Data
Sampling Method: P. Pump Grab
Sampling Location: River Left
Total Depth to Bottom of Channel (IQ: 24.4
WEATHER CONDITIONS
Temperature IF):
Sky:
Precipitation:
Wind (mph)
58.00
Sunny
None
5
eft
Tubing Depth (ft): 12.2 Distance to River Right: 64
Mufti Meter Used: Insitu Aqua Troll Distance to River Left: 24
Multi Meter ID: 706720 Distance to River (Right/Left) Units: 0
Latitude: 34.8516481653594
Longitude:-78.8265001088671
GPS Location (if collected)
General Comments:
Sample Comments:
P PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemour5 Fayetteville
Samplers: ERIN JANIGA KEN STUART
Date: 03-12-2024
SURFACE WATER SAMPLING RECORD
Location ID: 201
Sampling Event: 004 Transact Sampling
Time.
Project Manager: Tracy Ovbey
Event Type: Sampling
Spi ID
S I Date Time
is.
DO
Redox
urbidi
Spec. Cond.
Temp.
Color
Odor
DA/OC
m /L
my
NTU
pS/cm
°G
004RT0324-T2-201
031224
03-12-202411:55
7.22
9.32
159.10
36.90
134.11
20.31
Clear
No
Sampling Data
Sampling Method: P. Pump Grab
Sampling Location: River Right
Total Depth to Bottom of Channel (ft): 22.1
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
62.00
Sunny
None
5
ll
Tubing Depth (ft): 11 Distance to River Right: 22
Multi Meter Used: Insdu Aqua Troll Distance to River Lett: 67
Multi Meter ID: 706720 Distance to River (Right/Left) Units: 0
Latitude: 34.8449206961589
Longitude:-78.8245285035654
I
GPS Location if collected)
General Comments:
1116.
Sample Comments:
left
P PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemour5 Fayetteville
Samplers: ERIN JANIGA KEN STUART
Date: 03-12-2024
SURFACE WATER SAMPLING RECORD
Location ID: 202
Sampling Event: 004 Transact Sampling
Time.
Project Manager: Tracy Ovbey
Event Type: Sampling
Spi ID
S I Date Time
is.
DO
Redox
urbidi
Spec. Cond.
Temp.
Color
Odor
DA/OC
m /L
my
NTU
pS/cm
°C
004RT0324-T2-202
031224
03-12-202412:20
7.22
9.25
175.20
50.60
122.18
18.50
Clear w
articles
No
Sampling Data
Sampling Method: P. Pump Grab
Sampling Location: Center of River
Total Depth to Bottom of Channel (R): 23.5
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
62.00
Sunny
None
5
0
Tubing Depth (ft): 12.5 Distance to River Right: 46
Multi Meter Used: Insdu Aqua Troll Distance to River Left: 44
Multi Meter ID: 706720 Distance to River (Right/Left) Units: 0
Latitude: 34.8450619779629
Longitude:-78.8242892348481
I
GPS Location if collected)
General Comments:
Sample Comments7 how
River right
P PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemour5 Fayetteville
Samplers: ERIN JANIGA KEN STUART
Date: 03-12-2024
SURFACE WATER SAMPLING RECORD
Location ID: 203
Sampling Event: 004 Transact Sampling
Time.
Project Manager: Tracy Ovbey
Event Type: Sampling
Spi ID
S I Date Time
is.
DO
Redox
urbidi
Spec. Cond.
Temp.Larticlas
Odor
DA/OC
m /L
my
NTU
pS/cm
°C
004RT0324-T-203-
031224
03-12-202412:50
7.27
9.21
178.70
41.60
91.66
17.75
h
No
Sampling Data
Sampling Method: P. Pump Grab
Sampling Location: River Left
Total Depth to Bottom of Channel (ft): 25.11
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
62.00
Sunny
None
5
left
Tubing Depth (ft): 12.5 Distance to River Right: 62
Multi Meter Used: Insdu Aqua Troll Distance to River Lett: 27
Multi Meter ID: 706720 Distance to River (Right(Left) Units: 0
Latitude: 34.8450151901532
Longitude:-78.8241167001616
I
CPS Location (d collected)
General Comments:
Sample Comments:
River right
P PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemour5 Fayetteville
Samplers: ERIN JANIGA KEN STUART
Date: 03-12-2024
SURFACE WATER SAMPLING RECORD
Location ID: 301
Sampling Event: 004 Transact Sampling
Time.
Project Manager: Tracy Ovbey
Event Type: Sampling
Spi ID
S I Date Time
is.
DO
Redox
urbidi
Spec. Cond.
Temp.
Color
Odor
DA/OC
m /L
my
NTU
pS/cm
°G
004RT0324-T3-301
031224
03-12-202413:20
7.07
9.23
171.50
38.80
105.05
19.14
Clear
No
Sampling Data
Sampling Method: P. Pump Grab
Sampling Location: River Right
Total Depth to Bottom of Channel (ft): 21.5
WEATHER CONDITIONS
Temperature (F):
Sky:
Wind (mph)
.00
LS�.nnyPrecipdation: one
5
oil
Tubing Depth (ft): 10.75 Distance to River Right: 23
Multi Meter Used: Insdu Aqua Troll Distance to River Left: 68
Multi Meter ID: 706720 Distance to River (Right/Left) Units: 0
Latitude: 34.8378742553525
Longitude:-78.8234608372244
GPS Location if collected)
General Comments:IN
1116.
Sample Comments:
left
P PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemour5 Fayetteville
Samplers: ERIN JANIGA KEN STUART
Date: 03-12-2024
SURFACE WATER SAMPLING RECORD
Location ID: 302
Sampling Event: 004 Transact Sampling
Time.
Project Manager: Tracy Ovbey
Event Type: Sampling
Spi ID
S I Date Time
is.
DO
Redox
urbidi
Spec. Cord.
Temp.
Color
Odor
OA/OC
m /L
my
NTU
pS/cm
°G
004RT0324-T3-302
031224
03-12-202413:50
7.35
9.09
169.60
48.10
86.35
18.31
Clear
No
Sampling Data
Sampling Method: P. Pump Grab
Sampling Location: Center of River
Total Depth to Bottom of Channel (R): 22.8
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind(mph)
66.00
Sunny
None
5
oil
Tubing Depth (ft): 11.4 Distance to River Right: 48
Multi Meter Used: Insdu Aqua Troll Distance to River Left: 41
Multi Meter ID: 706720 Distance to River (Right/Left) Units: 0
Latitude: 34.8377512403365
Longitude:-78.8230150642725
GPS Location if collected)
General Comments:
Sample Comments7 bill
River left
P PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemour5 Fayetteville
Samplers: ERIN JANIGA KEN STUART
Date: 03-12-2024
SURFACE WATER SAMPLING RECORD
Location ID: 303
Sampling Event: 004 Transact Sampling
Time.
Project Manager: Tracy Ovbey
Event Type: Sampling
Spi ID
S I Date Time
is.
DO
Redox
urbidi
Spec. Cond.
Temp.LZrkle.
Odor
DA/OC
m /L
my
NTU
pS/cm
°C
004RT0324-T3-303
031224
03-12-202414:10
7.09
A.
176.70
42.20
86.73
1746
Clear
No
Sampling Data
Sampling Method: Pad Pump Grab
Sampling Location: River Left
Total Depth to Bottom of Channel (ft): 23.4
WEATHER CONDITIONS
Temperature (F):
Sky:
Wind (mph)
.00
LS�.nnyPrecipdation: one
5
left
Tubing Depth (ft): 11.75 Distance to River Right: 64
Multi Meter Used: Insdu Aqua Troll Distance to River Lett: 27
Multi Meter ID: 706720 Distance to River (Right/Left) Units: 0
Latitude: 34.8378583078199
Longitude:-78.8230374239092
GPS Location if collected)
General Comments:
1116.
Sample Comments:
right
P PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemour5 Fayetteville
Samplers: ERIN JANIGA KEN STUART
Date: 03-12-2024
SURFACE WATER SAMPLING RECORD
Location ID: 401
Sampling Event: 004 Transact Sampling
Time.
Project Manager: Tracy Ovbey
Event Type: Sampling
Spi ID
S I Date Time
is.
DO
Redox
urbidi
Spec. Cond.
Temp.Larticlas
Odor
DA/OC
m /L
my
NTU
pS/cm
°C
004RT0324-T4-401
031224
03-12-202415:15
7.02
9.39
150.40
46.80
102.17W18.81
h
NO
Sampling Data
Sampling Method: Peri Pump Grab
Sampling Location: River Right
Total Depth to Bottom of Channel (ft): 24.1
WEATHER CONDITIONS
Temperature (F):
Sky:
Wind (mph)
.00
LS�.nnyPrecipdation: one
5
oil
Tubing Depth (ft): 12 Distance to River Right: 25
Multi Meter Used: Insdu Aqua Troll Distance to River Lett: 67
Multi Meter ID: 706720 Distance to River (Right/Left) Units: 0
LatiWde: 34.8144667
Longitude:-78.821112
GPS Location if collected)
General Comments:
1116.
Sample Comments:
left
P PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemour5 Fayetteville
Samplers: ERIN JANIGA KEN STUART
Date: 03-12-2024
SURFACE WATER SAMPLING RECORD
Location ID: 402
Sampling Event: 004 Transact Sampling
Time.
Project Manager: Tracy Ovbey
Event Type: Sampling
Spi ID
S I Date Time
is.
DO
Redox
urbidi
Spec. Cond.
Temp.
ONdoor
DA/OC
m /L
my
NTU
pScm
°C
LZrkle.
004RT0324-T4-402
031224
03-12-202415:35
7.02
9.29
164.80
50.80
96.91
1713
Clear
Sampling Data
Sampling Method: P. Pump Grab
Sampling Location: Center of River
Total Depth to Bottom of Channel (R): 21.8
WEATHER CONDITIONS
Temperature (F):
Sky:
Wind (mph)
.00
LS�.nnyPrecipdation: one
5
left
Tubing Depth (ft): 11 Distance to River Right: 46
Multi Meter Used: Insdu Aqua Troll Distance to River Left: 47
Multi Meter ID: 706720 Distance to River (Right/Left) Units: 0
Latitude: 34.8143039
Longitude:-78.8208939
GPS Location if collected)
General Comments:
1116.
Sample Comments:
right
P PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemour5 Fayetteville
Samplers: Erin Jani a, Kenneth Stuart
Date: 03-12-2024
SURFACE WATER SAMPLING RECORD
Location ID: 403
Sampling Event: 004 Transact Sampling
Time.
Project Manager: Tracy Ovbey
Event Type: Sampling
Spi ID
S I Date Time
is.
DO
Redox
urbidi
Spec. Cond.
Temp.
ONdoor
DA/OC
m /L
my
NTU
pScm
°C
LZrrle.
004RT0324-T4-403
031224
03-12-202416:05
7.19
9.20
165.20
5.50
88.18
1742
Clear
Sampling Data
Sampling Method: P. Pump Grab
Sampling Location: River Left
Total Depth to Bottom of Channel (ft): 18.5
WEATHER CONDITIONS
Temperature (F):
Precipitation: Wind(mph)
�12]0Sky:
0
Tubing Depth (ft): 9.25 Distance to River Right: 65
Multi Meter Used: Insdu Aqua Troll Distance to River Lett: 27
Multi Meter ID: 706720 Distance to River (Right/Left) Units: 0
LatiWde: 34.8144341
Longitude:-78.8206774
GPS Location if collected)
General Comments:
Sample Comments:
right
P PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
SURFACE WATER SAMPLING RECORD
Site Name: Chemours Fayetteville Location ID: 101 Project Manager: Tracy Ovbey
Samplers: DEBORAH AVERS SAIRA BOHAMI Sampling Event: 004 Transact Sampling Event Type: Sampling
Date: 05-01-2024 Time: 12:42
Spi ID
Spl Date Time
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
QAIQC
mg/L
my
NTU
p5/om
C
004RT0524-Ti-101-
050124
05-01-202412:50
7.22
7.87
120.10
9.48
112.53
28.86
Clear
No
—
Samplinq Data
Sampling Method: Pari Pump Grab
Sampling Location: River Right
Total Depth to Bottom of Channel (ft): 20.4
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind(mph)
77.00
Sunny
None
3
RL
Tubing Depth (ft): 10 Distance to River Right: 29
Multi Meter Used: Insitu Aqua Troll Distance to River Left:
Multi Meter ID: F 706682 Distance to River (RlghttLeft) Units: 0
Latitude: 34.8513754205608
Longitude:-78.8269341894774
GPS Location (if collected)
General Comments:
Sample Comments:
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemours Fayetteville
Samplers: DEBORAH AVERS SAIRA BOHAM
Date: 05-01-2024
SURFACE WATER SAMPLING RECORD
Location ID: 102
Sampling Event: 004 Transact Sampling
Time: 12;23
Project Manager: Tracy Ovbey
Event Type: Sampling
Sampling Data
Sampling Method: Peri Pump Grab
Sampling Location: Center of River
Total Depth to Bottom of Channel (ft): 22.1
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
77.00
Sunny
None
3
RL
Tubing Depth (ft): 1U Distance to River Right: 43
Multi Meter Used: Insitu Aqua Troll Distance to River Left: 41
Multi Meter ID: 706682 Distance to River (RlghtlLeft) Units: 0
Latitude: 34.85142136
Longitude:-78.82680492 s
.i
GPS Location (if collected)
General Comments:
Sample Comments:
RR
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemours Fayetteville
Samplers: DEBORAH AVERS SAIRA BOHAM
Date: 05-01-2024
SURFACE WATER SAMPLING RECORD
Location ID: 103
Sampling Event: 004 Transact Sampling
Time: 12:00
Project Manager: Tracy Ovbey
Event Type: Sampling
Spi ID
Spi Data Time
pH
DO
Redo,
Turbiditt
Spec. Cond.
Temp.
Color
Odor
QA/QC
mg/L
mV
NTU
pS/cm
oC
004RT0524-Tl-103-
050124
05-01-202412:15
7.40
8.10
88.00
10.20
211.65
27.10
Clear
No
DUPIMSIMSD
Sampling Data
Sampling Method: Peri Pump Grab
Sampling Location: River Left
Total Depth to Bottom of Channel (ft): 20.2
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind(mph)
77.00
Sunny
None
3
Tubing Depth (ft): 10 Distance to River Right: 56
Multi Meter Used: Insitu Aqua Troll Distance to River Left: 27
Multi Meter ID: 706682 Distance to River (RlghtlLeft) Units: 0
'k
Latitude: 34.85126274 -
Longitude:-78.82661174
GPS Location (if collected)
General Comments:
Sample Comments:
RR
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
SURFACE WATER SAMPLING RECORD
Site Name: Chemoura Fayetteville Location ID: 201 Project Manager: Tracy Ovbey
Samplers: DEBORAH AYERS SAIRA BOHAMI Sampling Event: 004 Transact Sampling Event Type: Sampling
Dale: 05-01-2024 Time: 14:11
Spl ID
Spi Date Time
pH
DO
Redo,
Turbidity
Spec. Cond.
Temp.
Color
Odor
QA/QC
m /L
my
NTU
PS/cm
�C
004RT0524-T2-201-
050124
05-01-202414:15
7.24
8.02
120.40
9.18
110.90
26.99
Clear
No
--
Sampling Data
Sampling Method: Pen Pump Grab
Sampling Location: River Right
Total Depth to Bottom of Channel (ft): 18.5
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
82.00
Sunny
None
10
Tubing Depth (ft): Distance to River Right: 30
Multi Meter Used: Insitu Aqua Troll Distance to River Left: 59
Multi Meter ID: 706682 Distance to River (RlghtlLeft) Units: 0
Latitude: 34.8450749153094
Longitude:-78.8246117105418
I
GPS Location (if collected)
General Comments:
Sample Comments:
RR
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
SURFACE WATER SAMPLING RECORD
Site Name: Chemours Fayetteville Location ID: 202 Project Manager: Tracy Ovbey
Samplers: DEBORAH AYERS SAIRA BOHAMI Sampling Event: 004 Transact Sampling Event Type: Sampling
Dale: 05-01-2024 Time: 13:59
Spl ID
Spi Date Time
pH
DO
Red..
Turbidity
Spec. Cond.
Temp.
Color
Odor
QA/QC
mg/L
mV
NTU
PS/cm
�C
004RT0524-T2-202-
050124
05-01-202414:00
7.21
7.72
114.10
8.32
111.62
26.79
Clear
No
--
Sampling Data
Sampling Method: r Pen Pump Grab
Sampling Location: Center of River
Total Depth to Bottom of Channel (ft): 21
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
79.00
Sunny
None
3
RL
Tubing Depth (ft): 10.5 Distance to River Right: 45
Multi Meter Used: Insitu Aqua Troll Distance to River Left: 44
Multi Meter ID: 706682 Distance to River (Right(Left) Units: 0
Latitude: 34.8450715179252 S
Longitude:-78.8244171151103 0
GPS Location (If collected)
General Comments:
Sample Comments:
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
SURFACE WATER SAMPLING RECORD
Site Name: Chemours Fayetteville Location ID: 203 Project Manager: Tracy Ovbey
Samplers: DEBORAH AVERS SAIRA BOHAMI Sampling Event: 004 Trans. Ct Sampling Event Type: Sampling
Date: 05-01-2024 Time: 13:40
-
---------
Sampling Data
Sampling Method: Pert Pump Grab
Sampling Location: River Left
Total Depth to Bottom of Channel (ft): 21
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
78.00
Sunny
None
3
RL
Tubing Depth (ft): 10.5 Distance to River Right: 59
Multi Meter Used: Inshu Aqua Troll Distance to River Left: 27
Multi Meter ID: 706682 Distance to River (RIghtli Units: 0
Latitude: 34.8449628684552
Longitude:-78.824324624171 Q
SIPS Location (if collected)
General Comments:
Sample Comments:
PARSON5

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
SURFACE WATER SAMPLING RECORD
Site Name: Chemours Fayetteville Location ID: 301 Project Manager: Tracy Ovbey
Samplers: DEBORAH AVERS SAIRA BOHAMI Sampling Event: 004 Transact Sampling Event Type: Sampling
Date: 05-01-2024 Time: 15;12
Sampling Data
Sampling Method: Pon Pump Grab
Sampling Location: River Right
Total Depth to Bottom of Channel (ft): 18.7
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
82.00
Sunny
None
10
RR
Tubing Depth (ft): 9.6 Distance to River Right: 25
Multi Meter Used: Inshu Aqua Troll Distance to River Left: 63
Multi Meter ID: 706682 Distance to River (RIghULeft) Units: 0
Latitude: 34.8380609925248
Longitude:-78.8234522444133
GPS Location (if colledetl)
General Comments:
Sample Comments:
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
SURFACE WATER SAMPLING RECORD
Site Name: Chemours Fayetteville Location ID: 302 Project Manager: Tracy Ovbey
Samplers: DEBORAH AVERS SAIRA BOHAMI Sampling Event: 004 Transact Sampling Event Type: Sampling
Date: 05-01-2024 Time: 14:58
Sampling Data
Sampling Method: Peri Pump Grab
Sampling Location: Center of River
Total Depth to Bottom of Channel (ft): 19.7
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
82.00
Sunny
None
10
RL
Tubing Depth (ft): 10 Distance to River Right: 44
Multi Meter Used: Insitu Aqua Troll Distance to River Left: 44
Multi Meter ID: 706682 Distance to River (RlghtlLeft) Units: 0
Latitude: 34.8381877046643
Longitude:-78.8233008386022
GPS Location (if collected)
General Comments:
Sample Comments:
RR
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
SURFACE WATER SAMPLING RECORD
Site Name: Chemours Fayetteville Location ID: 303 Project Manager: Tracy Ovbey
Samplers: DEBORAH AVERS SAIRA BOHAMI Sampling Event: 004 Transact Sampling Event Type: Sampling
Date: 05-01-2024 Time: 14:40
Spi ID
Spi Date Time
pH
DO
Redo.
Turbidit
Spec. Cond.
Temp.
Color
Odor
QA/QC
mg/L
my
NTU
pS/cm
�C
004RT0524-T3-303-
050124
05-01-202414:45
6.99
7.83
150.30
10.90
121.60
26.78
Clear
No
--
Samolino Data
Sampling Method: Pari Pump Grab
Sampling Location: River Left
Total Depth to Bottom of Channel (ft): 18.7
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind(mph)
83.00
Sunny
None
10
Tubing Depth (ft): Distance to River Right: 59
Multi Meter Used: Insitu Aqua Troll Distance to River Left: 31
Multi Meter ID: 706682 Distance to River (RlghtlLefQ Units: 0
Latitude: 34.838135608391
Longitude:-78.8231455173016
GPS Location (if collected)
General Comments:
Sample Comments:
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
SURFACE WATER SAMPLING RECORD
Site Name: Chemours Fayetteville Location ID: 401 Project Manager: Tracy Ovbey
Samplers: DEBORAH AYERS SAIRA BOHAMI Sampling Event: 004 Transact Sampling Event Type: Sampling
Dale: 05-01-2024 Time: 16:22
Spi ID
Spi Date Time
pH
DO
Redo,
Turbidity
Spec. Cond.
Tamp.
Color
Odor
QA/QC
m /L
my
NTU
PS/cm
�C
004RT0524-T4401-
050124
05-01-202416:30
7.09
8.34
131.10
8.36
119.72
29.75
Clear
No
--
Sampling Data
Sampling Method: r Pen Pump Grab
Sampling Location: River Left
Total Depth to Bottom of Channel (ft): 11.1
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
82.00
Sunny
None
3
RR
Tubing Depth (ft): 5.5 Distance to River Right: 29
Multi Meter Used: Insitu Aqua Troll Distance to River Left: 52
Multi Meter ID: 706682 Distance to River (Right(Left) Units: 0
Latitude: 34.814433788009
Longitude:-78.8211864371426 0
OPS Location (If collected)
General Comments:
Sample Comments:
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
SURFACE WATER SAMPLING RECORD
Site Name: Chemours Fayetteville Location ID: 402 Project Manager: Tracy Ovbey
Samplers: DEBORAH AVERS SAIRA BOHAMI Sampling Event: 004 Transact Sampling Event Type: Sampling
Date: 05-01-2024 Time: 16:39
Spi ID
Spl Date Time
pH
DO
Redo,
Turbidity
Spec. Cond.
Tamp.
Color
Odor
QAIQC
m /L
my
NTU
PS/cm
oC
004RT0524-T4-402-
050124
05-01-202416:45
7.19
8.56
159.70
7.61
112.24
27.92
Clear
No
—
Samolina Data
Sampling Method: Pon Pump Grab
Sampling Location: Center of River
Total Depth to Bottom of Channel (ft): 12.7
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
83.00
Sunny
None
6
Tubing Depth (ft): © Distance to River Right: 40
Multi Meter Used: Insitu Aqua Troll Distance to River Left: 42
Multi Meter ID: F 706682 Distance to River (Right/Left) Units: 0
Latitude: 34.8143535794361
Longitude:-78.8209209403021
GPS Location (if collected)
General Comments:
Sample Comments:
RL
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
SURFACE WATER SAMPLING RECORD
Site Name: Chemours Fayetteville Location ID: 403 Project Manager: Tracy Ovbey
Samplers: DEBORAH AVERS SAIRA BOHAMI Sampling Event: 004 Transact Sampling Event Type: Sampling
Date: 05-01-2024 Time: tg;5q
Samolinn Data
Sampling Method: Pari Pump Grab
Sampling Location: River Right
Total Depth to Bottom of Channel (ft): 8.5
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipita8on:
Wind (mph)
84.00
Sunny
None
3
RL
Tubing Depth (ft): ® Distance to River Right: 52
Multi Meter Used: Insitu Aqua Troll Distance to River Left: 27
Multi Meter ID: F 706682 Distance to River (RlghtlLeft) Units: 0
Latitude: 34.8140578730098
Longitude:-78.8205944700897 Q
GPS Location (it collected)
General Comments:
Sample Comments:
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemoum Fayetteville
Samplers: GRANT WALLACE Brandon Weidner
Data 09-04-2024
SURFACE WATER SAMPLING RECORD
L—till ID: 101
Sampling Event: 004 Transact Sampling
Time: 08:56
Project Manager Tmcy Ovbey
Event Type: Sampling
Samulina Data
Sampling Method: Ped Pump Grab
Sampling Location: River Right
Total Depth to Bottom of Channel (ft): 22.6
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
80.00
Sunny
None
10
Tubing Depth (ft): 11 Distance to River Right: 18
Multi Meter Used: In-h-Aqua Troll 7 Distance to River Left: F
Multi Meter ID: 706770 Distance to River (Right/Left) Units: 0
Latitude: 34.8517908600039
Longitude:-78,8269102106172
i
GPS Location (if collected)
General Comments: ELI
Sample Comments:
River left
P PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemoum Fayefteville
Samplers: GRANT WALLACE Brandon Weidner
Date: 09-04-2024
SURFACE WATER SAMPLING RECORD
Location ID: 102
Sampling Event: 004 Transact Sampling
Time: 09:14
Project Manager. Tracy Ovbey
Event Type: Sampling
Spl ID
S I Date Time
pH
DO Red-
Turbidit7
Spec. Conti.
Temp.
Color
Odor
OAIOC
th my
NTU
pS/—
oC
004RT0924-T1-102-090424
09-04-202409:20
6.96
218.00
22.60
155.14
24.83
Clear
No
Semolina Data
Sampling Method: Pen Pump Grab
Sampling Location: Center of River
Total Depth to Bottom of Channel (ft): 21.5
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
80.00
Sunny
None
10
Tubing Depth (ft): 11 Distance to River Right: 40
Multi Meter Used: Insitu Aqua Troll Distance to River Left: 39
Multi Meter ID: 706770 Distance to River (Right/Left) Units: 0
Latitude: 34.8516889351813
Longitude:-78.8266416716116
7
GPS Location (if collected)
General Comments:
Sample Comments:
River left
PPARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemoura Fayetteville
Samplers: BRANDON WEIDNERDEBORAH AVERSGRANT WALLACE
Date: 09-04-2024
SURFACE WATER SAMPLING RECORD
Location ID: 103
Sampling Event: 004 Transact Sampling
Time: 09:32
Project Manager. Tracy Ovbey
Event Type: Sampling
Spi ID
S I Date Time
H DO Red-
Turbidiy
Spee. Cond.
Temp.
Color
Odor
OAIOC
my
NTU
PS/cm
^C
004RT0924-T1-103-090424
11111111[09-04-202409:40
175.40
34.70
%27
24.53
Clear
No
Samokna Data
Sampling Method: Pen Pump Grab
Sampling Location: River Left
Total Depth to Bottom of Channel (f): 21
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
80.00
Sunny
None
10
Tubing Depth (f): 10 Distance to River Right: 62
Multi Meter Used: Insitu Aqua Troll Distance to River Left: 19
Multi Meter ID: 706770 Distance to River (Right(Left) Units: 0
Latitude: 34.8517783767202
Longitude:-78,8264908045441 s
I
DIPS Location (if collected)
General Comments:
Sample Comments:
Lk� �
River right
P PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemours Fayetteville
Samplers: BRANDON WEIDNER DEBORAH AVERS GRANT WALLACE
Date: 09-04-2024
SURFACE WATER SAMPLING RECORD
Location ID: 201
Sampling Event: 004 Transact Sampling
Time: 09:63
Project Manager: Tracy Ovbey
Event Type: Sampling
Samolina Data
Sampling Method: Pen Pump Grab
Sampling Location: River Right
Total Depth to Bottom of Channel (ft): 21.9
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
80.00
Sunny
None
10
River righl
Tubing Depth di 11 Distance to River Right: 21
Multi Meter Used: Insitu Aqua Troll Distance to River Left: 67
Multi Meter ID: 70fi770 Distance to River (Right/Left) Units: 0
Latitude: 34.8503753999715
Longitude:-78.8264407706099 js
1
.PS Location (if collected)
General Comments:
Sample Comments:
left
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemours Fayetteville
Samplers: BRANDON WEIDNER DEBORAH AVERS GRANT WALLACE
Date: 09-04-2024
SURFACE WATER SAMPLING RECORD
Location ID: 202
Sampling Event: 004 Transact Sampling
Time: 10:17
Project Manager. Tracy Ovbey
Event Type: Sampling
Spi ID
S I Date Time
pH
DO Red-
Turbidiy
Bpee. Conti.
Temp.
Color
Odor
OAIOC
m
NTU
pS/cm004RT0924-T2-202-090424
09-04-202410:20-11P
7.13
E..gv
169.60
21.70
94.09
25.69
Clear with
particulate
None
Sampling Data
Sampling Method: Pen Pump Grab
Sampling Location: Center of River
Total Depth to Bottom of Channel (ft): 21.8
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
85.00
Sunny
None
10
River right
Tubing Depth (ft): 11.5 Distance to River Right: 45
Multi Meter Used: Insitu Aqua Troll Distance to River Left: 43
Multi Meter ID: 706770 Distance to River (Right(Left) Units: 0
Latitude: 34.8449506999759
Longitude:-78.8243742605986
I
DIPS Location (if collected)
General Comments:
Sample Comments:
left
PPAW50114S

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemoum Fayetteville
Samplers: BRANDON W EIDNER DEBORAH AVERS GRANT WALLACE
Data: 09-04-2024
SURFACE WATER SAMPLING RECORD
Location ID: 203
Sampling Event: 004 Transect Sampling
Time: 10:32
Project Manager: Tracy Ovbey
Event Type: Sampling
Sampling Dala
Sampling Method: Per! Pump Grab
Sampling Location: River Left
Total Depth to Bottom of Channel (ft): 23.1
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
85.00
Sunny
None
10
Tubing Depth (ft): 11.5 Distance to River Right: 70
Multi Meter Used: Insitu Aqua Troll Dlstance to River Left: 19
Multi Meter ID: 706770 Distance to River (Right/Left) Units: 0
Latitude: 34.8451341883217
Longitude:-78,8240697666171
I
GPS Location (if collected)
General Comments:
Sample Comments:
River left
P PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
S lte Name: Chemours Fayetteville
Samplers: BRANDON WEIDNER DEBORAH AVERS GRANT WALLACE
Data 09-04-2024
SURFACE WATER SAMPLING RECORD
Location ID: 301
Sampling Event: 004 Transact Sampling
Time: L 10:50
Project Manager: Tracy Ovbey
Event Type: Sampling
Sol ID
S I Date Time
R
DO Redox
Turbidly
Spec. Cond.
Temp.
Color
Odor
OAIOC
m L my
NTU
PS/cm
�C
004RT0924-T3-301-090424
09A4-202410:55
6.94::�
7. 184.10
22.10
11
25.55
Clear with
particles
None
Samolina Data
Sampling Method: Pan Pump Grab
Sampling Location: River Right
Total Depth to Bottom of Channel (ft): 20.5
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
85.00
Sunny
None
10
Tubing Depth (ft): 10 Distance to River Right: 24
Multi Meter Used: Insitu Aqua Troll Distance to River Left: 67
Multi Meter ID: 706770 Distance to River (RightlLeft) Units: 0
Latitude: 34.8379344124523
Longitude:-78.8234599450034
GPS Location (if collected)
General Comments:
Sample Comments:
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemoura Fayetteville
Samplers: BRANDON W EIDNER DEBORAH AVERS GRANT WALLACE
Data: 09-04-2024
SURFACE WATER SAMPLING RECORD
Location ID: 302
Sampling Event: 004 Transact Sampling
Time: 11:01
Project Manager Tmcy Ovbey
Event Type: Sampling
Sampling Data
Sampling Method: Ped Pump Grab
Sampling Location: Center of River
Total Depth to Bottom of Channel (ft): 19.2
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
85.00
Sunny
None
10
River right
Tubing Depth (ft): 95 Distance to River Right:
Multi Meter Used: Insftu Aqua Troll Distance to River Left:
Multi Meter ID: 706770 Distance to River (Right/Left) Units: 0
Latitude: 34.8378671372849
Longitude:-78,8232622469956
GPS Location (if collected)
General Comments:
Sample Comments:
River left
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemours Fayetteville
Samplers: BRANDON WEIDNER DEBORAH AVERS GRANT WALLACE
Date: 09-04-2024
SURFACE WATER SAMPLING RECORD
LocationlD: 303
Sampling Event 004 Transact Sampling
Time: 11:12
Project Manager: Tracy Ovbey
Event Type: Sampling
Spl ID
S I Date Time pH
DO Retloa
Turbldftj
Spec. Cond.
Temp.
Color
Odor
OAIOC
m /L mV
NTU
PS/cm
aC
004RT0924-T3-303-090424
09-04-202411:15
152.50
22.70
96.04
26.0fi
Clearwith
particles
None
Sampling Data
Sampling Method: Pen Pump Grab
Sampling Location: River Left
Total Depth to Bottom of Channel (ft): 22.8
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
85.00
Sunny
None
10
River right
Tubing Depth (ft): 11.5 Distance to River Right 69
Multi Meter Used: Insilu Aqua Troll Distance to River Left: 25
Multi Meter ID: 706770 Distance to River (RighULeft) Units: 0
Latitude: 34.8378380005198
Longitude:-788229619378002
GPS Location (if collected)
General Comments:
Sample Comments:
River left
P PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemours Fayetteville
Samplers: BRANDON WEIDNER DEBORAH AVERS GRANT WALLACE
Date: 09-04-2024
SURFACE WATER SAMPLING RECORD
Location ID: 401
Sampling Event: 004 Transact Sampling
Time: 13:36
Project Manager: Tracy Ovbey
Event Type: Sampling
Spi ID
S I Data Time
pH
DO Redoz
Turbldip
Spec. Cond.
Temp.
Color
Odor
DAfOC
m /L mV
NTU
PS/cm
"C
004RT0924-T4401-090424
09-04-202413:40
7.06
7.3 185.00
24.70
121.03
2783
Clear with
particulates
None
Samplina Data
Sampling Method: Pen Pump Grab
Sampling Location: River Right
Total Depth to Bottom of Channel (ft): 22.3
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
85.00
Sunny
None
10
Right
Tubing Depth (ft): 11 Distance to River Right: 23
Multi Meter Used: Insitu Aqua Troll Distance to River Left: 58
Multi Meter ID: 70fi770 Distance to River (RighVI-eft) Units: 0
Latitude: 34.8138535679093
Longitude:-78.820N74169304
.IS Location (if collected)
General Comments:
Sample Comments:
'-t
or.PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemours Fayetteville
Samplers: BRANDON WEIDNERDEBORAH AVERSGRANT WALLACE
Date: 09-04-2024
SURFACE WATER SAMPLING RECORD
Location ID: 402
Sampling Event: 004 Transact Sampling
Time:
Project Manager: Tracy Ovbey
Event Type: Sampling
Spi ID
S I Date Time
pH
DO Red-
TurbIdItl
Spa.. Cond.
Temp.
Color
Odor
OAIOC
my
NTU
PS/cm
^C
004RT0924-T4402-090424
09-04-2024 13:55
7,11
184.40
27.30
99.35
28.25
Hazy
None
Sampling Data
Sampling Method: Pen Pump Grab
Sampling Location: Center of River
Total Depth to Bottom of Channel (ft): 17.5
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
85.00
Sunny
None
10
U
Tubing Depth (ft): Distance to River Right: 42
Multi Meter Used: Insitu Aqua Troll Distance to River Left: 40
Multi Meter ID: 706770 Distance to River (Right(Left) Units: 0
Latitude: 34.8138634432fi95
Longitude:-78,8208072192214
DIPS Location (if collected)
General Comments:
Sample Comments:
PPARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemours Fayetteville
Samplers: BRANDON WEIDNER DEBORAH AVERS GRANT WALLACE
Date: 09-04-2024
SURFACE WATER SAMPLING RECORD
Location ID: 403
Sampling Event: 004 Tmnsect Sampling
Time: 13:56
Project Manager: Tracy Ovbey
Event Type: Sampling
Sampling Data
Sampling Method: Red Pump Grab
Sampling Location: River Left
Total Depth to Bottom of Channel (ft): 12.5
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
85.00
Sunny
None
15
River right
Tubing Depth di Distance to River Right: 59
Multi Meter Used: Insitu Aqua Troll Distance to River Left: 20
Multi Meter ID: 70fi770 Distance to River (RighVLeft) Units: 0
Latitude: 34.813868577239
Longitude:-78,8206221806065
.IS Location (if collected)
General Comments:
Sample Comments:
left
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemours Fayetteville
Samplers: BRANDON WEIDNERGRANT WALLACE
Date: 11-13-2024
SURFACE WATER SAMPLING RECORD
Location ID: 101
Sampling Event: 004 Transact Sampling
Time: oa:zs
Project Manager: Tracy Obey
Event Type: Sampling
S I ID
S I Date Time
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
OAIOC
m /L
my
NTU
PS/cm
C
004RT1124-T1-101-
111324
11-13-202408:30
7.72
10.15
-19.So
8.94
189.17
14.0o
Clear
None
DUPIMSIMSD
Sampling Data
Sampling Method: Ped Pump Grab Tubing Depth (ft): 10 Distance to River Right: 24
Sampling Location: River Right Multi Meter Used: Insltu Aqua Troll Distance to River Left: 57
Total Depth to Bottom of Channel (ft): 20 Multi Meter ID: 766679 Distance to River (Right/Left) Units: 0
WEATHER CONDITIONS
Temperature (F):
Sky.
Precipitation:
Wind(mph)
44.00
Sunny
None
11
Latitude: 34.8516345396962
Longitude:-78.826929526477
i
GPS Location (if collected)
General Comments.
Sample Comments:
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name:
Chemours Fayetteville
Samplers:
BRANDON WEIDNER
Date:
11-13-2024
SURFACE WATER SAMPLING RECORD
Location ID: 102
Sampling Event: 004 Transem Sampling
Time: 08:53
Project Manager: Tracy Ovbey
Event Type: Sampling
S I ID
S I Date Time pH DO Radon,
Turbid
Spec. Cond.
Temp.
Color
Odor "OC
m /L my
NTU
pS/cm
�C
004RT1124-Ti-102-
111324
11-13-202409:05 21.00
8.92
117.41
13.76
Clear
Sampling Data
Sampling Method: Pen Pump Grab
Sampling Location: Center of River
Total Depth to Bottom of Channel (ft): 22
WEATHER CONDITIONS
Temperature (F):
Sky.
Precipitation:
Wind (Mph)
44.00
Sunny
None
11
Right
Tubing Depth (ft): 11 Distance to River Right: 38
Mufti Meter Used: Insitu Aqua Troll Distance to River Left: 41
Mufti Meter ID: 766679 Distance to River (Right/Left) Units: 0
Latitude: 34,8516087234345
Longitude:-78.8266016264249
i
GPS Location (if collected)
General Comments -
Sample Comments:
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemours Fayetteville
Samplers: BRANDON WEIDNERGRANTWALLACE
Date: 11-13-2024
SURFACE WATER SAMPLING RECORD
Location ID: 103
Sampling Event: 004 Transect Sampling
Time: pg;ig
Project Manager: Tracy Ovbey
Event Type: Sampling
S I ID
S I Date Time
H
DO
Red—
Turbid
Spec. Cond.
Temp.
Color
Odor
DA/OC
m /L
mV
NTU
PS/cm
C
004RT1124-T1-103-
111324
11.13-202409:20
8.10
64.80
8.86
104.20
14.07
Clear
None
Sampling Data
Sampling Method: Pert Pump Gmb
Sampling Location: River Lett
Total Depth to Bottom of Channel (ft): r 18
WEATHER CONDITIONS
Temperature (E):
Sky:
Precipitation:
Wind(mph)
50.00
Sunny
None
10
Tubing Depth (fi 0 Distance to River Right: 70
Multi Meter Used: Insftu Aqua Troll Distance to River Left: 19
Mufti Meter ID: 766679 Distance to River (Right/Left) Units: 0
Latitude: 34.8514952743751
Longitude:-78.8265532628436 S
SIPS Location (if collected)
General Comments:
Sample Comments:
Left
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemours Fayetteville
Samplers: BRANDON WEIDNERGRANT WALLACE
Date: 11-13-2024
SURFACE WATER SAMPLING RECORD
Location ID: 201
Sampling Event: 004 Tmnsect Sampling
Time: 11:38
Project Manager: Tracy Ovbey
Event Type: Sampling
3 I ID
S I Date Time pH DO Radon, Turbid
Spec. Cond.
Temp.
Color
Odor
DA/OC
m /L my NTU
PS/cm
C
004RT1124-T2-201-
1 11324
11-13-202411:40 10.30
169.91
18.75
Clear
No-
Sampling Data
Sampling Method: P. Pump Grab
Sampling Location: River Right
Total Depth to Bottom of Channel (ft): 19.9
WEATHER CONDITIONS
Temperature(F):
Sky.
Precipitation:
Wind(mph)
Sunny
None
10
Tubing Depth (ft): 10 Distance to River Right: 23
Multi Meter Used: Insltu Aqua Troll Distance to River Left: 64
Multi Meter ID: 766679 Distance to River (Right/Left) Units:
Latitude: 34,845029432359
Longitude:-78.8245103415836
GPS Location (if collected)
General Comments:
Sample Comments: —
Left
P PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Ste Name:
Chemours Fayetteville
Samplers:
BRANDON WEIDNERGRANT WALLACE
Dale:
11-13-2024
SURFACE WATER SAMPLING RECORD
Location ID: 202
Sampling Event: 004 Transact Sampling
Time: 11:s0
Project Manager: Tracy Ovbey
Event Type: Sampling
S I ID
S I Date Time
P. DO Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor "QC
m /L my
NTU
pS/cm
C
004RT1124-T2-202-
111324
11-13-202411:55
7.4g 23.90
9.37
123.70
19.08
Clear
None
Sampling Data
Sampling Method: Pert Pump Grab
Sampling Location: Center of River
Total Depth to Bottom of Channel (ft): 19.5
WEATHER CONDITIONS
Temperature(F):
Sky:
Precipitation:
Wind(mph)
s'.00
Sunny
None
1p
Tubing Depth (ft): 10 Distance to River Right: 48
Multi Meter Used: Insitu Aqua Troll Distance to River Left: 40
Multi Meter ID: 766679 Distance to River (Right/Left) Units: 0
Latitude: 34.8452488286745
Longitude:-78.8242935855676
I
GPS Location df collected)
General Comments:
Sample Comments:
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemours Fayetteville
Samplers: BRANDON WEIDNERGRANT WALLACE
Date: 11-13-2024
SURFACE WATER SAMPLING RECORD
Location ID: 203
Sampling Event: 004 Transact Sampling
Time: 12:08
Project Manager: Tracy Ovbey
Event Type: Sampling
3 I ID
S I Date Time pH DO Radon, Turbid
Spec. Cond.
Temp.
Color
Odor
DA/OC
m /L my NTU
PS/cm
C
004RT1124-T2-203-
1 11324
11-13-202412:15 8.45
125.47
20.41
Clear
No-
Sampling Data
Sampling Method: P. Pump Grab
Sampling Location: River Left
Total Depth to Bottom of Channel (ft): 22.2
WEATHER CONDITIONS
Temperature(F):
Sky.
Precipitation:
Wind(mph)
ao.00
Sunny
None
y
Tubing Depth (ft): 11 Distance to River Right: 22
Multi Meter Used: Insltu Aqua Troll Distance to River Left: 65
Multi Meter ID: 766679 Distance to River (Right/Left) Units:
Latitude: 34,8451223038461
Longitude:-78.8241460640718
GPS Location (if collected)
General Comments:
Sample Comments: —
Left
P PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemours Fayetteville
Samplers: BRANDON WEIDNERGRANTWALLACE
Date: 11-13-2024
SURFACE WATER SAMPLING RECORD
Location ID: 301
Sampling Event: 004 Transact Sampling
Time: 1y;g0
Project Manager: Tracy Ovbey
Event Type: Sampling
S I ID
S I Date Time DO
Redox
TurbiditySpec.
Cond.
Temp.
Color
Odor
DA/OC
m /L
pS/cm
aC
004RT1124-T3-301-
111324
4H
11-13-2024 12:40
�1,1
165.14
1g-.0
Clear
None
Sampling Data
Sampling Method: P. Pump Grab
Sampling Location: River Right
Total Depth to Bottom of Channel (ft): F19
WEATHER CONDITIONS
Temperature (F):
Sky.
Precipitation:
Wind (Mph)
61.00
Sunny
None
9
Tubing Depth (ft): 9.5 Distance to River Right: 24
Multi Meter Used: Insflu Aqua Troll Distance to River Left: 66
Multi Meter ID: 766679 Distance to River (Right/Left) Units: 0
Latitude: 34.8380350694385
Longitude:-78.8234538865078
GPS Location (if collected)
General Comments:
Sample Comments:
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Ste Name:
Chemours Fayedeville
Samplers:
BRANDON WEIDNERGRANT WALLACE
Date:
11-13-2024
SURFACE WATER SAMPLING RECORD
Location ID: 302
Sampling Event: 004 Tmnsect Sampling
Time: 2:54
Project Manager: Tracy Ovbey
Event Type: Sampling
Bpi ID
S I Date Time
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
OAIOC
m /L
my
NTU
PS/cm
C
004RT1124-T3-302-
111324
11-13-202412.55
7.53
8.17
-25.60
7.19
126.92
19.52
Clear
None
Sampling Data
Sampling Method: Pert Pump Grab
Sampling Location: Center of River
Total Depth to Bottom of Channel (ft): 16.7
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind hniph)
61.00
Sunny
N.-
9
Right
Tubing Depth (ft): ® Distance to River Right: 47
Multi Meter Used: Insitu Aqua Troll Distance to River Left: 42
Multi Meter ID: 766679 Distance to River (RighULeft) Units: 0
Latitude: 34,8379860353049
Longitude:-78.8231332787115
GPS Location (it collected)
General Comments:
Sample Comments:
Left
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Ste Name: Chemours Fayedeville
Samplers: BRANDON WEIDNERGRANT WALLACE
Date: 11-13-2024
SURFACE WATER SAMPLING RECORD
Location ID: 303
Sampling Event: 004 Transact Sampling
Time: a:10
Project Manager: Tracy Ovbey
Event Type: Sampling
S I ID
S I Date Time
PH DO Radon, Turbidity
Spec. Cond.
Temp.
Color
Odor
OA/OC
m /L my
PS/cm
C
004RT1124-T3-303-
111324
11-13-202413:15
7.60
129.16
20.53
Clear
None
Sampling Data
Sampling Method: Pert Pump Grab
Sampling Location: River Left
Total Depth to Bottom of Channel (ft): 20.1
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (.ph)
6200.
Sunny
N.-
9
Tubing Depth (ft): 10 Distance to River Right: 65
Mufti Meter Used: Insflu Aqua Troll Distance to River Left: 24
Multi Meter ID: 766679 Distance to River (Right/Left) Units: 0
Latitude: i 34,8379639908996
Longitude:-78.8228202984471
GPS Location (it collected)
General Comments.
Sample Comments:
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Ste Name:
Chemours Fayetteville
Samplers:
BRANDON WEIDNERCHARLES PACE
Dale:
11-13-2024
SURFACE WATER SAMPLING RECORD
Location ID: 401
Sampling Event: 004 Tmnsect Sampling
Time: 5:25
Project Manager: Tracy Ovbey
Event Type: Sampling
S I ID
S I Date Time
p.
DO Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
OAIOC
m /L mV
NTU
PS/cm
C
004RT1124-T4-401-
111324
11-13-202415:30
6.90
9.64
7.99
147.27
17.27
Clear
None
Sampling Data
Sampling Method: Pert Pump Grab
Sampling Location: River Right
Total Depth to Bottom of Channel (ft): 17.6
WEATHER CONDMIONS
Temperature (F):
Sky:
Precipitation:
Wind(mph)
6200.
Sunny
None
9
Right
Tubing Depth (ft): 8.6 Distance to River Right: 21
Muttt Meter Used: Insflu Aqua Troll Distance to River Left: 59
Multi Meter ID: 766679 Distance to River (Right/Left) Units: 0
Latitude: 34.813997028428
Longitude:-78.8209208753694
GPS Location (if collected)
General Comments.
Sample Comments:
Left
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Ste Name:
Chemours Fayetteville
Samplers:
BRANDON WEIDNERCHARLES PACE
Dale:
11-13-2024
SURFACE WATER SAMPLING RECORD
Location ID: 402
Sampling Event: 004 Transact Sampling
Time: 15:40
Project Manager: Tracy Ovbey
Event Type: Sampling
Bpi ID
S I Date Time
pH DO Radon,
Turbidity
Spec. Cond.
Temp.
Color
Odor
DA/OC
m /L my
NTU
PS/cm
C
004RT1124-T4-402-
111324
11-13-202415.45
7.3 22.00
9.75
124.39
17.31
Clear
None
Sampling Data
Sampling Method: Pert Pump Gmb
Sampling Location: Center of River
Total Depth to Bottom of Channel (ft): 10.9
WEATHER CONDITIONS
Temperature(F):
Sky:
Precipitation:
Wind (mph)
a2.00
Sunny
None
g
Tubing Depth (ft): 5.5 Distance to River Right: 43
Multi Meter Used: Insitu Aqua Troll Distance to River Left: 39
Multi Meter ID: 766679 Distance to River (Right/Left) Units: 0
Latitude: 34,8139408277672
Longitude:-78.8207318634529
.PS Location (if collected)
General Comments.
Sample Comments:
PARSONS

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Site Name: Chemoum Fayetteville
Samplers: BRANDON WEIDNERCHARLES PACE
Data: 11-13-2024
SURFACE WATER SAMPLING RECORD
Location ID: 403
Sampling Event: 004 Transact Sampling
Time: 15:53
Project Manager: Tracy Ovbay
Event Type: Sampling
Spec. Cond.
Temp.
S I ID
S I Date Time
p.
DO
Redo
Turbldlh
Color
Odor
QA/QC
m /L
my
NTU
PS/Cm
oC
004RT1124-T4-403
111324
11-13-202415:55
7.37
9.73
33.70
8.43
113.88
16.99
Clear
None
Sampling Data
Sampling Method: Peri Pump Grab
Sampling Location: River Left
Total Depth to Bottom of Channel (ft): 7.4
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind(mph)
62.00
Sunny
None
9
Right
Tubing Depth (it): 3.5 Distance to River Right: 57
Multi Meter Used: Insitu Aqua Troll Distance to River Left: 21
Multi Meter ID: 766679 Distance to River (Right/Left) Units: 0
Latitude: 34.8141641635772
Longitude:-78.8205107488472
GPS Location (if Collected)
General Comments:
Sample Comments:
FIAR501115

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Appendix C
Lab Reports and DVMs
TRI287 - Capc F— Rivcr PFAS Outfall 004 NPDES Rivcr Transco M—it-mg-2024 Rcport

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
ADQM Data Review
Site: Chemours Fayetteville
Project: River Transect Sampling 1 Q24
Project Reviewer: Bridget Gavaghan

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Sample Summary
Field Sample ID
Lab Sample ID
Sample
Filtered
Sample Date
Sample
Sample
Matrix
Time
Purpose
004RT0324-T1-101-
320-110489-1
Water
N
03/12/2024
10:00
FS
031224
004RT0324-T1-102-
320-110489-2
Water
N
03/12/2024
10:30
FS
031224
004RT0324-T1-103-
320-110489-3
Water
N
03/12/2024
11:00
FS
031224
004RT0324-T1-103-
320-110489-4
Water
N
03/12/2024
11:00
DUP
031224-D
004RT0324-T2-201-
320-110489-5
Water
N
03/12/2024
11:55
FS
031224
004RT0324-T2-202-
320-110489-6
Water
N
03/12/2024
12:20
FS
031224
004RT0324-T2-203-
320-110489-7
Water
N
03/12/2024
12:50
FS
031224
004RT0324-T3-301-
320-110489-8
Water
N
03/12/2024
13:20
FS
031224
004RT0324-T3-302-
320-110489-9
Water
N
03/12/2024
13:50
FS
031224
004RT0324-T3-303-
320-110489-10
Water
N
03/12/2024
14:10
FS
031224
004RT0324-T4-401-
320-110489-11
Water
N
03/12/2024
15:15
FS
031224
004RT0324-T4-402-
320-110489-12
Water
N
03/12/2024
15:35
FS
031224
004RT0324-T4-403-
320-110489-13
Water
N
03/12/2024
16:05
FS
031224
004RT0324-EB-
320-110489-14
Blank
NJ
03/13/2024
09:00
EB
031324
Water
* FS=Field Sample
DUP=Field Duplicate
FB=Field Blank
EB=Equipment Blank
TB=Trip Blank

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Analytical Protocol
Lab Name
Lab Method
Parameter Category
Sampling Program
Eurofins Environ
Testing Northern
CI. Spec. Table 3
Per- and Polyfluorinated
River Transect Sampling 1 Q24
Cali
Compound SOP
Alkyl Substances (PFAS)

Docusign Envelope ID: 1FCOFDFF-525E-4254-BED4-70B31CBCE6DD
ADQM Data Review Checklist
DVM
Laboratory
Exception
Item
Description
Yes
No*
Narrative
Report
Report (ER)
Report
#
Did samples meet laboratory acceptability
A
requirements upon receipt (i.e., intact, within
X
temperature, properly preserved, and no
headspace where applicable)?
B
Were samples received by the laboratory in
X
agreement with the associated chain of custody?
C
Was the chain of custody properly completed by
X
X
the laboratory and/or field team?
D
Were samples prepped/analyzed by the laboratory
X
within method holding times?
Were data review criteria met for method blanks,
LCSs/LCSDs, MSs/MSDs, PDSs, SDs, replicates,
E
surrogates, sample results within calibration range,
X
total/dissolved samples, field duplicates,
field/equipment/trip blanks?
F
Were all data usable and not Rqualified?
X
ER#
Description
Other QA/QC Items to Note:
See DVM Narrative Report, Laboratory Report, and/or ER # for further details as indicated.
The electronic data submitted for this project were reviewed via the Data Verification Module (DVM)
process. The data are acceptable for use without qualification.
The lab reports due to a large page count are stored on a network shared drive and are available to be
posted on external shared drives, or on a flash drive.

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Data Verification Module (DVM)
The DVM is an internal review process used by the ADQM group to assist with the determination of data
usability. The electronic data deliverables received from the laboratory are loaded into the Locus EIM TM
database and processed through a series of data quality checks, which are a combination of software,
Locus ElMW database Data Verification Module (DVM), and manual reviewer evaluations. The data are
evaluated against the following data usability checks:
• Field and laboratory blank contamination
• US EPA hold time criteria
• Missing Quality Control (QC) samples
• Matrix spike (MS)/matrix spike duplicate (MSD) recoveries and the relative percent differences
(RPDs) between these spikes
• Laboratory control sample (LCS)/laboratory control sample duplicate (LCSD) recoveries and the
RPD between these spikes
• Surrogate spike recoveries for organic analyses
• Difference/RPD between field duplicate sample pairs
• RPD between laboratory replicates for inorganic analyses
• Difference/percent difference between total and dissolved sample pairs
There are two qualifier fields in EIM:
Laboratory Qualifier is the qualifier assigned by the laboratory and may not reflect the usability of
the data. This qualifier may have many different meanings and can vary between labs and over time
within the same lab. Please refer to the laboratory report for a description of the laboratory qualifiers.
As they are laboratory descriptors they are not to be used when evaluating the data.
Validation Qualifier is the 3rd party formal validation qualifier if this was performed. Otherwise this
field contains the qualifier resulting from the ADQM DVM review process. This qualifier assesses the
usability of the data and may not equal the laboratory qualifier. The DVM applies the following data
evaluation qualifiers to analysis results, as warranted:
Qualifier
Definition
B
Not detected substantially above the level reported in the laboratory or field
blanks.
R
Unusable result. Anal to may or may not be present in the sample.
J
Anal to present. Reported value may not be accurate or precise.
UJ
Not detected. Reporting limit may not be accurate or precise.
The Validation Status Code field is set to "DVM" if the ADQM DVM process has been performed. If the
DVM has not been run, the field will be blank.
If the DVM has been run (Validation Status Code equals "DVM"), use the Validation Qualifier.
If the data have been validated by a third party, the field "Validated By" will be set to the validator (e.g.,
ESI for Environmental Standards, Inc.)

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
ADQM Data Review
Site: Chemours Fayetteville
Project: River Transect Sampling 2Q24 (updated)
Project Reviewer: Michael Aucoin

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Sample Summary
Sample
Sample
Sample
Field Sample ID
Lab Sample ID
Matrix
Filtered
Sample Date
Time
Purpose
004RT0524-T1-103-
Surface
050124
320-112042-1
Water
N
05/01/2024
12:50
FS
004RT0524-T3-301-
Surface
050124
320-112042-10
Water
N
05/01/2024
14:45
FS
004RT0524-T4-403-
Surface
050124
320-112042-11
Water
N
05/01/2024
16:30
FS
004RT0524-T4-402-
Surface
050124
320-112042-12
Water
N
05/01/2024
16:45
FS
004 RT0524-T4-401-
Surface
050124
320-112042-13
Water
N
05/01/2024
16:55
FS
004RT0524-T1-103-
Surface
050124-D
320-112042-2
Water
N
05/01/2024
12:15
DUP
004 RT0524-T 1-102-
Surface
050124
320-112042-3
Water
N
05/01/2024
12:30
FS
004RT0524-T1-101-
Surface
050124
320-112042-4
Water
N
05/01/2024
12:15
FS
004RT0524-T2-203-
Surface
050124
320-112042-5
Water
N
05/01/2024
14:15
FS
004RT0524-T2-202-
Surface
050124
320-112042-6
Water
N
05/01/2024
14:00
FS
004RT0524-T2-201-
Surface
050124
320-112042-7
Water
N
05/01/2024
13:45
FS
004RT0524-T3-303-
Surface
050124
320-112042-8
Water
N
05/01/2024
15:15
FS
004RT0524-T3-302-
Surface
050124
320-112042-9
Water
N
05/01/2024
15:00
FS
* FS=Field Sample
DUP=Field Duplicate
FB=Field Blank
EB=Equipment Blank
TB=Trip Blank

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Analytical Protocol
Lab Name
Lab Method
Parameter Category
Sampling Program
Eurofins Environ
Testing Northern
CI. Spec. Table 3
Per- and Polyfluorinated
River Transect Sampling 2Q24
Cali
Compound SOP
Alkyl Substances (PFAS)

Docusign Envelope ID: 1FCOFDFF-525E-4254-BED4-70B31CBCE6DD
ADQM Data Review Checklist
DVM
Laboratory
Exception
Item
Description
Yes
No*
Narrative
Report
Report (ER)
Report
#
Did samples meet laboratory acceptability
A
requirements upon receipt (i.e., intact, within
X
temperature, properly preserved, and no
headspace where applicable)?
B
Were samples received by the laboratory in
X
agreement with the associated chain of custody?
C
Was the chain of custody properly completed by
X
X
the laboratory and/or field team?
D
Were samples prepped/analyzed by the laboratory
X
within method holding times?
Were data review criteria met for method blanks,
LCSs/LCSDs, MSs/MSDs, PDSs, SDs, replicates,
E
surrogates, sample results within calibration range,
X
total/dissolved samples, field duplicates,
field/equipment/trip blanks?
F
Were all data usable and not Rqualified?
X
ER#
Description
Other QA/QC Items to Note:
See DVM Narrative Report, Laboratory Report, and/or ER # for further details as indicated.
The electronic data submitted for this project were reviewed via the Data Verification Module (DVM)
process. The data are acceptable for use without qualification, except as noted on the attached DVM
Narrative Report.
The lab reports due to a large page count are stored on a network shared drive and are available to be
posted on external shared drives, or on a flash drive.

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Data Verification Module (DVM)
The DVM is an internal review process used by the ADQM group to assist with the determination of data
usability. The electronic data deliverables received from the laboratory are loaded into the Locus El TM
database and processed through a series of data quality checks, which are a combination of software,
Locus ElMW database Data Verification Module (DVM), and manual reviewer evaluations. The data are
evaluated against the following data usability checks:
• Field and laboratory blank contamination
• US EPA hold time criteria
• Missing Quality Control (QC) samples
• Matrix spike (MS)/matrix spike duplicate (MSD) recoveries and the relative percent differences
(RPDs) between these spikes
• Laboratory control sample (LCS)/laboratory control sample duplicate (LCSD) recoveries and the
RPD between these spikes
• Surrogate spike recoveries for organic analyses
• Difference/RPD between field duplicate sample pairs
• RPD between laboratory replicates for inorganic analyses
• Difference/percent difference between total and dissolved sample pairs
• Temperature upon laboratory receipt not to exceed 10 C (manual check)
There are two qualifier fields in EIM:
Laboratory Qualifier is the qualifier assigned by the laboratory and may not reflect the usability of
the data. This qualifier may have many different meanings and can vary between labs and over time
within the same lab. Please refer to the laboratory report for a description of the laboratory qualifiers.
As they are laboratory descriptors they are not to be used when evaluating the data.
Validation Qualifier is the 3rd party formal validation qualifier if this was performed. Otherwise this
field contains the qualifier resulting from the ADQM DVM review process. This qualifier assesses the
usability of the data and may not equal the laboratory qualifier. The DVM applies the following data
evaluation qualifiers to analysis results, as warranted:
Qualifier
Definition
B
Not detected substantially above the level reported in the laboratory or field
blanks.
R
Unusable result. Anal to may or may not be present in the sample.
J
Anal to present. Reported value may not be accurate or precise.
UJ
Not detected. Reporting limit may not be accurate or precise.
The Validation Status Code field is set to "DVM" if the ADQM DVM process has been performed. If the
DVM has not been run, the field will be blank.
If the DVM has been run (Validation Status Code equals "DVM"), use the Validation Qualifier.
If the data have been validated by a third party, the field "Validated By" will be set to the validator (e.g.,
ESI for Environmental Standards, Inc.)

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
DVM Narrative Report
Site: Fayetteville Sampling Program: River Transect Sampling 2Q24 Validation Options: LABSTATS
Validation Reason Code: Uncertainty around the analysis of R-PSDA, Hydrolyzed PSDA and R-EVE; J-qualifier added to all detects in the data set, even if there was no matrix spike analyzed for that
particular sample.
Date
Validation
Analytical
Field Sample ID
Sampled Lab Sample ID
Analyte
Result Units
Type
MDL PQL
Qualifier
Method Pre -prep
004RT0524-T4-401-
05/01/2024 320-112042-13
Hydrolyzed PSDA
0.0031 UG/L
PQL
0.0020
J
Cl. Spec. Table 3
050124
Compound SOP
004RT0524-T4-402-
05/01/2024 320-112042-12
Hydrolyzed PSDA
0.0029 UG/L
PQL
0.0020
J
Cl. Spec. Table 3
050124
Compound SOP
004RT0524-T4-403-
05/01/2024 320-112042-11
Hydrolyzed PSDA
0.0020 UG/L
PQL
0.0020
J
Cl. Spec. Table 3
050124
Compound SOP
Prep
PFAS_DI_Prep
PFAS_DI_Prep
PFAS_DI_Prep
Page 1 of 1

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
ADQM Data Review
Site: Chemours Fayetteville
Project: River Transect Sampling 3Q24 (updated)
Project Reviewer: Michael Aucoin

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Sample Summary
Sample
Sample
Sample
Field Sample ID
Lab Sample ID
Matrix
Filtered
Sample Date
Time
Purpose
004RT0904-T1-101-
Surface
090424
320-115204-1
Water
N
09/04/2024
09:00
FS
004RT0904-T1-101-
Surface
090424-D
320-115204-2
Water
N
09/04/2024
09:00
DUP
004RT0904-T1-102-
Surface
090424
320-115204-3
Water
N
09/04/2024
09:20
FS
004RT0904-T1-103-
Surface
090424
320-115204-4
Water
N
09/04/2024
09:40
FS
004 RT0904-T2-201-
Surface
090424
320-115204-5
Water
N
09/04/2024
10:15
FS
004RT0904-T2-202-
Surface
090424
320-115204-6
Water
N
09/04/2024
10:20
FS
004RT0904-T2-203-
Surface
090424
320-115204-7
Water
N
09/04/2024
10:35
FS
004RT0904-T3-301-
Surface
090424
320-115204-8
Water
N
09/04/2024
10:55
FS
004RT0904-T3-302-
Surface
090424
320-115204-9
Water
N
09/04/2024
11:05
FS
004RT0904-T3-303-
Surface
090424
320-115204-10
Water
N
09/04/2024
11:15
FS
004RT0904-T4-401-
Surface
090424
320-115204-11
Water
N
09/04/2024
13:40
FS
004RT0904-T4-402-
Surface
090424
320-115204-12
Water
N
09/04/2024
13:55
FS
004RT0904-T4-403-
Surface
090424
320-115204-13
Water
N
09/04/2024
14:05
FS
004RT0904-EB-
Blank
090424
320-115204-14
Water
N
09/04/2024
14:20
EB
* FS=Field Sample
DUP=Field Duplicate
FB=Field Blank
EB=Equipment Blank
TB=Trip Blank

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Analytical Protocol
Lab Name
Lab Method
Parameter Category
Sampling Program
Eurofins Environ
Testing Northern
CI. Spec. Table 3
Per- and Polyfluorinated
River Transect Sampling 3Q24
Cali
Compound SOP
Alkyl Substances (PFAS)

Docusign Envelope ID: 1FCOFDFF-525E-4254-BED4-70B31CBCE6DD
ADQM Data Review Checklist
DVM
Laboratory
Exception
Item
Description
Yes
No*
Narrative
Report
Report (ER)
Report
#
Did samples meet laboratory acceptability
A
requirements upon receipt (i.e., intact, within
X
temperature, properly preserved, and no
headspace where applicable)?
B
Were samples received by the laboratory in
X
agreement with the associated chain of custody?
C
Was the chain of custody properly completed by
X
the laboratory and/or field team?
D
Were samples prepped/analyzed by the laboratory
X
within method holding times?
Were data review criteria met for method blanks,
LCSs/LCSDs, MSs/MSDs, PDSs, SDs, replicates,
E
surrogates, sample results within calibration range,
X
total/dissolved samples, field duplicates,
field/equipment/trip blanks?
F
Temperature upon laboratory receipt meets range
X
not frozen to 6 C manual check)?
G
Were all data usable and not R qualified?
X
ER#
Description
Other QA/QC Items to Note:
See DVM Narrative Report, Laboratory Report, and/or ER # for further details as indicated.
The electronic data submitted for this project were reviewed via the Data Verification Module (DVM)
process. The data are acceptable for use without qualification, as noted on the attached DVM Narrative
Report.
The lab reports due to a large page count are stored on a network shared drive and are available to be
posted on external shared drives, or on a flash drive.

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Data Verification Module (DVM)
The DVM is an internal review process used by the ADQM group to assist with the determination of data
usability. The electronic data deliverables received from the laboratory are loaded into the Locus El TM
database and processed through a series of data quality checks, which are a combination of software,
Locus ElMW database Data Verification Module (DVM), and manual reviewer evaluations. The data are
evaluated against the following data usability checks:
• Field and laboratory blank contamination
• US EPA hold time criteria
• Missing Quality Control (QC) samples
• Matrix spike (MS)/matrix spike duplicate (MSD) recoveries and the relative percent differences
(RPDs) between these spikes
• Laboratory control sample (LCS)/laboratory control sample duplicate (LCSD) recoveries and the
RPD between these spikes
• Surrogate spike recoveries for organic analyses
• Difference/RPD between field duplicate sample pairs
• RPD between laboratory replicates for inorganic analyses
• Difference/percent difference between total and dissolved sample pairs
• Temperature upon laboratory receipt meets range not frozen to 6 C (manual check).
There are two qualifier fields in EIM:
Laboratory Qualifier is the qualifier assigned by the laboratory and may not reflect the usability of
the data. This qualifier may have many different meanings and can vary between labs and over time
within the same lab. Please refer to the laboratory report for a description of the laboratory qualifiers.
As they are laboratory descriptors they are not to be used when evaluating the data.
Validation Qualifier is the 3rd party formal validation qualifier if this was performed. Otherwise this
field contains the qualifier resulting from the ADQM DVM review process. This qualifier assesses the
usability of the data and may not equal the laboratory qualifier. The DVM applies the following data
evaluation qualifiers to analysis results, as warranted:
Qualifier
Definition
B
Not detected substantially above the level reported in the laboratory or field
blanks.
R
Unusable result. Anal to may or may not be present in the sample.
J
Anal to present. Reported value may not be accurate or precise.
UJ
Not detected. Reporting limit may not be accurate or precise.
The Validation Status Code field is set to "DVM" if the ADQM DVM process has been performed. If the
DVM has not been run, the field will be blank.
If the DVM has been run (Validation Status Code equals "DVM"), use the Validation Qualifier.
If the data have been validated by a third party, the field "Validated By" will be set to the validator (e.g.,
ESI for Environmental Standards, Inc.)

Docusign Envelope ID: 1 FC0FDFF-525E-4254-BED4-70B31 CBCE6DD
/�_COM Imagined.
/�"�1� Delivered.
DVM Narrative Report
Site: Fayetteville Sampling Program: River Transect Sampling 3Q24 Validation Options: LABSTATS
The electronic data submitted for this project was reviewed via the DVM process. The data is acceptable for use without qualification.

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
ADQM Data Review
Site: Chemours Fayetteville
Project: River Transect Sampling 4Q24
Project Reviewer: Michael Aucoin

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Sample Summary
Sample
Sample
Sample
Field Sample ID
Lab Sample ID
Matrix
Filtered
Sample Date
Time
Purpose
004RT 1 124-T4-401 -
Surface
111324
320-117046-1
Water
N
11/13/2024
15:30
FS
004RT1124-T4-402-
Surface
111324
320-117046-2
Water
N
11/13/2024
15:45
FS
004 RT 1124-T4-403-
Surface
111324
320-117046-3
Water
N
11/13/2024
15:55
FS
BLANK
004RT1 124-EB-1 1324
320-117047-1
WATER
N
11/13/2024
14:20
FS
004RT 1124-T 1-101-
Surface
111324
320-117074-1
Water
N
11/13/2024
08:30
FS
004RT1124-T3-303-
Surface
111324
320-117074-10
Water
N
11/13/2024
13:15
FS
004 RT 1124-T 1-101-
Surface
111324-D
320-117074-2
Water
N
11/13/2024
08:30
DUP
004RT1124-T1-102-
Surface
111324
320-117074-3
Water
N
11/13/2024
09:05
FS
004RT1124-T1-103-
Surface
111324
320-117074-4
Water
N
11/13/2024
09:20
FS
004RT1124-T2-201-
Surface
111324
320-117074-5
Water
N
11/13/2024
11:40
FS
004RT1124-T2-202-
Surface
111324
320-117074-6
Water
N
11/13/2024
11:55
FS
004RT1124-T2-203-
Surface
111324
320-117074-7
Water
N
11/13/2024
12:15
FS
004RT1124-T3-301-
Surface
111324
320-117074-8
Water
N
11/13/2024
12:40
FS
004RT1124-T3-302-
Surface
111324
320-117074-9
Water
N
11/13/2024
12:55
FS
* FS=Field Sample
DUP=Field Duplicate
FB=Field Blank
EB=Equipment Blank
TB=Trip Blank

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Analytical Protocol
Lab Name
Lab Method
Parameter Category
Sampling Program
Eurofins Environ
Testing Northern
Cl. Spec. Table 3
Per- and Polyfluorinated
River Transect Sampling 4Q24
Cali
Compound SOP
Alkyl Substances (PFAS)

Docusign Envelope ID: 1FCOFDFF-525E-4254-BED4-70B31CBCE6DD
ADQM Data Review Checklist
DVM
Laboratory
Exception
Item
Description
Yes
No*
Narrative
Report
Report (ER)
Report
#
Did samples meet laboratory acceptability
A
requirements upon receipt (i.e., intact, within
X
temperature, properly preserved, and no
headspace where applicable)?
B
Were samples received by the laboratory in
X
X
agreement with the associated chain of custody?
C
Was the chain of custody properly completed by
X
the laboratory and/or field team?
D
Were samples prepped/analyzed by the laboratory
X
within method holding times?
Were data review criteria met for method blanks,
LCSs/LCSDs, MSs/MSDs, PDSs, SDs, replicates,
E
surrogates, sample results within calibration range,
X
X
X
total/dissolved samples, field duplicates,
field/equipment/trip blanks?
F
Temperature upon laboratory receipt meets range
X
not frozen to 6 C manual check)?
G
Were all data usable and not R qualified?
X
ER#
Description
Other QA/QC Items to Note:
See DVM Narrative Report, Laboratory Report, and/or ER # for further details as indicated.
The electronic data submitted for this project were reviewed via the Data Verification Module (DVM)
process. The data are acceptable for use without qualification, except as noted on the attached DVM
Narrative Report.
The lab reports due to a large page count are stored on a network shared drive and are available to be
posted on external shared drives, or on a flash drive.

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
Data Verification Module (DVM)
The DVM is an internal review process used by the ADQM group to assist with the determination of data
usability. The electronic data deliverables received from the laboratory are loaded into the Locus EIMTM
database and processed through a series of data quality checks, which are a combination of software,
Locus ElMW database Data Verification Module (DVM), and manual reviewer evaluations. The data are
evaluated against the following data usability checks:
• Field and laboratory blank contamination
• US EPA hold time criteria
• Missing Quality Control (QC) samples
• Matrix spike (MS)/matrix spike duplicate (MSD) recoveries and the relative percent differences
(RPDs) between these spikes
• Laboratory control sample (LCS)/laboratory control sample duplicate (LCSD) recoveries and the
RPD between these spikes
• Surrogate spike recoveries for organic analyses
• Difference/RPD between field duplicate sample pairs
• RPD between laboratory replicates for inorganic analyses
• Difference/percent difference between total and dissolved sample pairs
• Temperature upon laboratory receipt meets range not frozen to 6 C (manual check)
There are two qualifier fields in EIM:
Laboratory Qualifier is the qualifier assigned by the laboratory and may not reflect the usability of
the data. This qualifier may have many different meanings and can vary between labs and over time
within the same lab. Please refer to the laboratory report for a description of the laboratory qualifiers.
As they are laboratory descriptors they are not to be used when evaluating the data.
Validation Qualifier is the 3rd party formal validation qualifier if this was performed. Otherwise this
field contains the qualifier resulting from the ADQM DVM review process. This qualifier assesses the
usability of the data and may not equal the laboratory qualifier. The DVM applies the following data
evaluation qualifiers to analysis results, as warranted:
Qualifier
Definition
B
Not detected substantially above the level reported in the laboratory or field
blanks.
R
Unusable result. Anal to may or may not be present in the sample.
J
Anal to present. Reported value may not be accurate or precise.
UJ
Not detected. Reporting limit may not be accurate or precise.
The Validation Status Code field is set to "DVM" if the ADQM DVM process has been performed. If the
DVM has not been run, the field will be blank.
If the DVM has been run (Validation Status Code equals "DVM"), use the Validation Qualifier.
If the data have been validated by a third party, the field "Validated By" will be set to the validator (e.g.,
ESI for Environmental Standards, Inc.)

Docusign Envelope ID: 1 FCOFDFF-525E-4254-BED4-7OB31 CBCE6DD
DVM Narrative Report
Site: Fayetteville Sampling Program: River Transect Sampling 4Q24 Validation Options: LABSTATS
Validation Reason Code: Uncertainty around the analysis of R-PSDA, Hydrolyzed PSDA and R-EVE; J-qualifier added to all detects in the data set, even if there was no matrix spike analyzed for that
particular sample.
Field Sample ID
004RT1124-T4-401-
111324
004RT1124-T4-401-
111324
004RT1124-T4-402-
111324
004RT1124-T4-402-
111324
004RT1124-T4-403-
111324
004RT1124-T4-403-
111324
004RT1124-T3-303-
111324
Date
Validation
Analytical
Sampled Lab Sample ID
Analyte
Result
Units
Type
MDL PQL
Qualifier
Method
11/13/2024 320-117046-1
R-PSDA
0.0029
UG/L
PQL
0.0020
J
Cl. Spec. Table 3
Compound SOP
11/13/2024 320-117046-1
Hydrolyzed PSDA
0.0031
UG/L
PQL
0.0020
J
Cl. Spec. Table 3
Compound SOP
11/13/2024 320-117046-2
R-PSDA
0.0031
UG/L
PQL
0.0020
J
Cl. Spec. Table 3
Compound SOP
11/13/2024 320-117046-2
Hydrolyzed PSDA
0.0030
UG/L
PQL
0.0020
J
Cl. Spec. Table 3
Compound SOP
11/13/2024 320-117046-3
R-PSDA
0.0020
UG/L
PQL
0.0020
J
Cl. Spec. Table 3
Compound SOP
11/13/2024 320-117046-3
Hydrolyzed PSDA
0.0029
UG/L
PQL
0.0020
J
Cl. Spec. Table 3
Compound SOP
11/13/2024 320-117074-10
R-PSDA
0.0020
UG/L
PQL
0.0020
J
Cl. Spec. Table 3
Compound SOP
Pre -prep
Prep
PFAS_DI_Prep
PFAS_DI_Prep
PFAS_DI_Prep
PFAS_DI_Prep
PFAS_DI_Prep
PFAS_DI_Prep
PFAS_DI_Prep
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