2024.06.27_CCOA.p1_Q1 2024_Mass Loading Assessment Appendices

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consultants
Geosyntec Consultants of NC, P.C.
NC License No.: C-3500 and C-295
Appendix A
Cape Fear River PFAS Mass Loading Model
TRI 156 - Cape Fear River PFAS Mass Loading Assessment— First Quarter 2024 Report 19 June 2024

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Appendix A: Cape Fear River PFAS Mass LoadinIZ Model consultants
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1 INTRODUCTION AND OBJECTIVE
The objective of this appendix is to estimate the mass discharge from the identified PFAS transport
pathways using a Cape Fear River mass loading model developed and described in the Cape Fear
River Mass Loading Calculation Protocol Version 2 (Geosyntec, 2020a) and to assess
contributions by pathway. The following sections describe the transport pathways, the results from
the mass loading model, and the limitations of the mass loading model. Supporting tables for the
Mass Loading Model are provided in Attachment ATTL
The one-year period of monthly sampling of the mass loading model pathways per Consent Order
(CO) Paragraph 1(b) was completed in December 2021. Quarterly sample collection was initiated
in January 2022 and will continue for a period of 4 years (through Q4 2025) (Geosyntec, 2020a).
1.1 Mass Loading Model Transport Pathways
The nine potential pathways representing compartments to the mass loading model were identified
as potential contributors of PFAS to river PFAS concentrations (Geosyntec, 2020a). Remedies
have been implemented to capture PFAS and prevent HAS from reaching the Cape Fear River at
five of the nine pathways. In addition, these remedies have had a positive effect on reducing PFAS
from the remaining pathways without remedies in place (e.g., the Thermal Oxidizer reduces aerial
deposition [Transport Pathway 3] which also reduces deposition on Willis Creek [Transport
Pathway 2]). The pathways are described below:
• Transport Pathway 1: Upstream Cape Fear River and Groundwater — This pathway is
comprised of contributions from non-Chemours related PFAS sources on the Cape Fear
River and tributaries upstream of the Site, and upstream offsite groundwater with PFAS
present from aerial deposition.
• Transport Pathway 2: Willis Creek — Groundwater and stormwater discharge and aerial
deposition to Willis Creek and then to the Cape Fear River.
• Transport Pathway 3 (Remedy: Thermal Oxidizer and Carbon Bed Air Emission
Treatment): Direct aerial deposition of PFAS on the Cape Fear River (see Attachment
ATT2 for further details).
• Transport Pathway 4 (Remedy: Stormwater Capture and Treatment in the
Monomers IXM Manufacturing Area): Outfall 002 — Comprised of (i) water drawn from
the Cape Fear River and used as non -contact cooling water, (ii) treated non-Chemours
process water, (iii) Site stormwater, (iv) steam condensate, and (v) power neutralization
discharge, which are then discharged through Outfall 002.
• Transport Pathway 5 (Remedy: Barrier Wall and Groundwater Extraction
Treatment): Onsite Groundwater — Direct upwelling of onsite groundwater to the Cape
Fear River from the Black Creek Aquifer. Additional details are provided in Attachment
ATT3.
TRI 156 -Cape Fear River PFAS Mass Loading Assessment First Quarter 2024 Report 1 June 2024

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Appendix A: Cape Fear River PFAS Mass LoadinIZ Model consultants
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• Transport Pathway 6 (Remedy: Seep Flow -Through Cells): Seeps — Onsite
groundwater seeps A, B, C and D and the offsite Lock and Dam Seep originating above
the Cape Fear River water level on the bluff face from the facility that then discharge into
the Cape Fear River.
• Transport Pathway 7 (Remedy: Outfall 003 Stream Capture and Treatment System):
Outfall 003 Stream (previously referred to as Old Outfall 002) — Groundwater discharge
and stormwater runoff to the Outfall 003 Stream that flows into the Cape Fear River.
• Transport Pathway 8: Adjacent and Downstream Offsite Groundwater — Offsite
groundwater adjacent and downstream of the Site upwelling to the Cape Fear River.
• Transport Pathway 9: Georgia Branch Creek — Groundwater, stormwater discharge and
aerial deposition to Georgia Branch Creek and then to the Cape Fear River.
For the Q 1 2024 mass loading model assessments, data sources used as model inputs for each
potential pathway are described in Table A1.
TRI 156 -Cape Fear River PFAS Mass Loading Assessment First Quarter 2024 Report 2 June 2024

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Appendix A: Cape Fear River PFAS Mass LoadinjZ Model consultants
Geosyntec Consultants of NC, P.C.
NC License No.: C-3500 and C-295
2 SAMPLING ACTIVITIES AND LABORATORY ANALYSIS
The mass loading model sampling program for this reporting period consisted of collecting
concentration and flow data from the various PFAS transport pathways during the reporting period
(January 2023). A total of 39 water samples were collected, which includes surface water (seep,
creeks, Outfall 003 Stream, Outfall 002, and Cape Fear River) and groundwater. The sample
collection and flow measurement methods of each pathway are outlined in Table A2. The field
forms are provided in Appendix C. Details of the sampling methods and flow measurement
methods can be found in Cape Fear River Mass Loading Calculation Protocol Version 2
(Geosyntec, 2020a).
2.1 Flow Measurements
The flow rates measured for the seep and surface water events are reported in Table A2. Details
on the flow calculations for each model transport pathway along with measurement methods at
each flow gauging location are provided in Attachment Tables ATT 1-1 to ATT 1-10.
2.2 Surface Water Sample Collection
The seep water, surface water, and river water samples were collected from January 24 to 26, 2024.
The three downstream samples along the Cape Fear River (Bladen Bluffs, Tar Heel, and Kings
Bluff) were sampled from January 24 to 25, 2024. A total of 15 primary samples and 1 duplicate
sample were collected. Due to high water levels, three locations were offset upstream at an
alternate location as close as possible to the mouth of the surface water body:
• Willis Creek: approximately 0.28 miles upstream
• Georgia Branch Creek: 1.1 miles upstream
• Outfall 003 stream: 0.059 miles upstream
The Lock and Dam Seep was sampled this quarter, as shown in the photo below:
TR 1156 - Cape Fear River PFAS Mass Loading Assessment First Quarter 2024 Report 3 June 2024

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However, the Lock and Dam North was not sampled during this sampling event because the seep
was under water on January 24, 2024, as shown in the photo below:
-- 4' 1,
rez_"' L�0* aawi
Field parameters recorded for these samples are provided in Table A2.
2.3 Water Levels and Groundwater Sample Collection
One synoptic water level survey of the onsite groundwater monitoring well network was completed
on January 11, 2024 (Table A3). From January 15 to February 7, 2024, groundwater samples were
collected from 21 locations, including 18 of the 20 monitoring wells outlined in CO Paragraph 16
(Table A4). This list of groundwater wells is derived from the Corrective Action Plan (CAP)
(Geosyntec, 2019). The groundwater field parameters are provided in Table A4.
2.4 Laboratory Analyses
Samples were sent to Eurofins Scientific (West Sacramento, CA) and were analyzed for Table 3+
and other PFAS compounds using Method 537 Mod Max (56 compounds which includes PFPrA).
TRI 156 -Cape Fear River PFAS Mass Loading Assessment First Quarter 2024 Report 4 June 2024

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Appendix A: Cape Fear River PFAS Mass LoadinjZ Model consultants
Geosyntec Consultants of NC, P.C.
NC License No.: C-3500 and C-295
3 PFAS ANALYTICAL RESULTS
The analytical results from samples during the Q1 2024 surface water and groundwater sampling
events are presented in Tables A5 and A6, respectively. During this sampling event, all 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 D of the main report. The analytical data have been reviewed and validated.
The duplicate samples have also been compared to the primary samples.
3.1 Data Validation
Laboratory analytical data for the samples collected during the Q 1 2024 reporting period 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
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:
TRI 156 -Cape Fear River PFAS Mass Loading Assessment First Quarter 2024 Report 5 June 2024

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• 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. During this sampling event, all 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 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
these compounds is inaccurate due to interferences by the sample matrix (Geosyntec, 2020b).
Results for these three analytes are J-qualified as estimated.
3.1.1. Correction of PFPrA Concentration
On April 23, 2024, Eurofins- Sacramento informed Chemours via email that a calculation error had
been incorporated into the preparation of calibration standards for perfluoropropanoic acid
(PFPrA) under the laboratory's 537 Mod Max methodology. The error resulted in a 36% low bias
in PFPrA concentrations. The error affected Chemours samples collected on behalf of the
Fayetteville Works Site between June 2023 and April 2024. Chemours informed NCDEQ of the
PFPrA calculation error via telephone on May 15, 2024, and provided NCDEQ with Eurofins-
Sacramento's memo describing their root cause analysis of the PFPrA calculation error on May
22, 2024.
PFPrA results that were calculated incorrectly have been corrected by Eurofins-Sacramento and
provided to Chemours. These results fall into two categories: 1) results that were corrected before
being reported to NCDEQ, and 2) results that were reported to NCDEQ before being corrected.
The PFPrA results for Q 1 2024 provided in this report fall into category 1). They are being
reported here for the first time. PFPrA results from July 2023 to December 2023 that have been
provided in previous reports in this sampling program fall into category 2). Appendix E of this
report provides a table of the results in category 2) with corrected PFPrA concentration values.
Additional detail is provided in a letter submitted to NCDEQ by Chemours on June 18, 2024,
which is provided in Appendix F.
3.2 Surface Water PFASAnalytical Results
For the surface and seep water samples, two equipment blanks were collected on January 25, 2024.
PFAS were not detected above associated reporting limits in these field blanks. Two field
duplicates were collected at the Lock -Dam Seep location on January 24, 2024. PFAS results for
the primary (CAP 1 Q24-LOCK-DAM-SEEP-012424) and duplicate samples (CAP 1 Q24-LOCK-
DAM-SEEP-012424-D) had relative percent differences of less than 30% for the reported
compounds, except for PFO4DA.
TRI 156 -Cape Fear River PFAS Mass Loading Assessment First Quarter 2024 Report 6 June 2024

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Appendix A: Cape Fear River PFAS Mass LoadinjZ Model consultants
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Analytical results for the seep, surface, and river water samples are summarized in Table A5 (Table
3+) and Attachment Table ATT1-11 (Mod 537). Figure Al shows the Total Table 3+ (17
compounds) concentrations reported for samples collected in Q 12024 that corresponds to the mass
loading model transport pathways. Figure A2 and A3 show the Total Table 3+ (17 compounds)
concentrations and HFPO-DA concentrations at upstream and downstream locations along the
Cape Fear River.
Among the collected river samples, Total Table 3+ (17 compounds) concentrations ranged from
non -detect below associated reporting limits (upstream sample at CFR MILE 76 on January 24,
2024) to 5.2 ng/L (downstream sample at CFR KINGS on January 25, 2024).
For the creeks, the Total Table 3+ (17 compounds) concentrations were 1,400 ng/L and 1,500 ng/L
at Willis Creek and Georgia Branch, respectively. These concentrations are within the range of
concentrations observed during previous events (Geosyntec: 2020b,c,d; 2021a,b,c,d; 2022a,b,c,d;
2023a,b,c,d; 2024a).
Among the Seeps and Outfall 002 Stream, Seep D effluent had the lowest Total Table 3+ (17
compounds) concentrations (25 ng/L), while Lock -Dam Seep had the highest Total Table 3+ (17
compounds) concentration (110,000 ng/L). The analytical results for the Seeps influent are not
included in this report but are provided in CFR Long -Term Remedy Performance Monitoring
Report #5 (Geosyntec 2024b).
Figure A3 shows the HFPO-DA concentrations in the four near-site/downstream river sampling
locations. HFPO-DA concentrations were either below 10 ng/L or non -detect (i.e. below the
associated reporting limits) (CFR BLADEN, CFR MILE 76, and CFR TARHEEL on January 24,
2024 and CFR KINGS and CFR TARHEEL on January 25, 2024).
3.3 Groundwater PFAS Analytical Results
For the groundwater samples, the following observations were noted for the QA/QC samples:
• Four equipment blank samples were collected during the sampling event. No PFAS were
detected above the associated reporting limits in any of the equipment blank samples.
• Two field duplicates were collected at the PIW-7D location on January 15, 2024, and the
PW-09 location on January 23, 2024. PFAS results for the primary (CAP1Q24-PIW-7D-
011524 and CAP 1 Q24-PW-09-012324 and duplicate sample (CAP 1 Q24-PIW-7D-
011524-D and CAP 1 Q24-PW-09-012324-D) had relative percent differences of less than
30% for the reported compounds.
Individual PFAS and Total PFAS concentrations for the groundwater samples collected in Q 1
2024 are summarized in Tables A6 (Table 3+), Attachment Table ATT1-12 (Mod 537), and Figure
A4. Total Table 3+ (17 compounds) concentrations ranged from non -detect below the associated
reporting limits (PW-09) to 340,000 ng/L (LTW-05). In general, the next highest concentrations
TRI 156 -Cape Fear River PFAS Mass Loading Assessment First Quarter 2024 Report 7 June 2024

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were observed in the LTW, PZ, and PIW wells near the mouths of the seeps adjacent to the river
(Figure A4).
On an aquifer basis, lower individual and Total Table 3+ (17 compounds) concentrations are
observed in wells screened in the Surficial Aquifer. The results from the Q1 2024 monitoring are
consistent with trends observed at these wells in previous monitoring events (Geosyntec:
2020b,c,d; 2021a,b,c,d; 2022a,b,c,d; 2023a,b,c,d; 2024a).
3.4 Groundwater Elevations
Groundwater elevations were calculated for onsite and offsite wells screened in the Perched Zone,
Surficial Aquifer, and Black Creek Aquifer from the synoptic water level measurement survey
performed in January 2024 (Table A4). Groundwater elevations from these synoptic water levels
are presented on the Perched Zone, Surficial Aquifer, and Black Creek Aquifer maps (Figures A5-
1, A5-2, and A5-3, respectively).
TRI 156 -Cape Fear River HAS Mass Loading Assessment First Quarter 2024 Report 8 June 2024

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Appendix A: Cape Fear River PFAS Mass LoadinjZ Model consultants
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4 MASS LOADING MODEL ASSESSMENT
The Total PFAS mass discharge per pathway to the Cape Fear River is summarized in Table A7.
These mass discharge values from the mass loading model assessment are considered as a
`snapshot' in time. Analyte-specific mass discharges estimated from the Mass Loading Model are
provided in Attachment ATT I.
4.1 Model -Estimated PFAS Mass Discharge
The model -estimated Total Table 3+ (17 compounds) mass discharge from the potential transport
pathways during Q 1 2024 is 1.33 mg/s (Attachment able ATT 1-13) and represents the mass
discharge estimated downgradient of the remedies (i.e., after the water passes through the
remedies, "after remedies"). Further, this quarter's mass discharge value of 1.33 mg/s continues
to be less than the historical "after remedies" mass discharge estimates from mass loading model
events prior to the operation of the groundwater extraction system (historical "after remedies" prior
to operation of groundwater extraction system ranged from 2.3 to 24 mg/s) (Geosyntec: 2019b;
2020b,c,d; 2021a; 2021b; 2021c; 2021d; 2021e; 2022b; 2022c; 2022d; 2023a).
4.2 Comparison ofBefore Remedies and Current PFAS Mass Discharge
This section compares Q 1 2024 mass discharge values downgradient of the remedies (i.e., after
the water passes through the remedies, "after remedies") to mass discharge values from past
quarters upgradient of the remedies (i.e., before the water passes through the remedies, "before
remedies", or where no remedies were implemented) (Geosyntec: 2019b; 2020b; 2020c; 2020d;
2021 a; 2021 b; 2021 c; 2021 d; 2021 e; 2022b; 2022c; 2022d; 2023a). The in -text table and figure
below summarize the historical before remedies Total Table 3+ (17 compounds) mass discharge
from Q3 2020 to Q4 2022 and the after remedies mass discharge for this quarter. The pathways
with remedies (Seeps, Outfall 003 Stream, Outfall 002, and onsite groundwater) have substantially
lower mass discharges, i.e., lower contributions to total mass discharge to the river, than the
historical before remedies mass discharges. The remaining pathways have mass discharges that
are within the range of previous values.
The in -text table and figure indicate three major findings:
1. The Ql 2024 mass discharges to the Cape Fear River are either equivalent to historical
levels or significantly lower. Note that the mass discharge of 0.79 mg/s for Georgia Branch
Creek was at the higher end of the range of before remedies mass discharges. However, the
Total Table 3+ (17 compounds) concentration of 1,500 was within the range of previous
events (1,300 to 3,100 ng/L), and it was the higher flow volume (11.97 MG) that resulted
in the higher mass discharge estimate. This estimate is also similar to a previous Q1 event
in January 2021, where the concentration and the flow were 1,500 ng/L and 11.84 MG,
respectively, resulting in a mass discharge of 0.78 mg/s.
TRI 156 -Cape Fear River PFAS Mass Loading Assessment First Quarter 2024 Report 9 June 2024

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2. The pathways with remedies (Seeps, Outfall 003 Stream and Onsite Groundwater) all show
a significant mass discharge decrease in Q 12024 compared to historical, pre-remediation
ranges.
3. The total mass discharge to the Cape Fear River from the Site is much lower in Q 1 2024
compared to historical before remedies mass discharges.
Model Transport Pathway
Historical Before Remedies Total
Table 3+ (17 Compounds) Mass
Discharge (mg/s)1
Min Median Max
Q1 2024 Total Table
3+ (17 Compounds)
Mass Discharge
(mg/s)
Aerial Deposition
0.01
0.01
0.02
0.01
Upstream River and Groundwater
0
0.27
4.5
0
Willis Creek
0.31
0.57
0.96
0.37
Seeps
3.0
5.4
8.4
0.08
Onsite Groundwater
1.5
3.6
9.6
0.04
Outfall002
0.006
0.10
0.68
0.03
Georgia Branch Creek
0.10
0.32
0.78
0.79
Outfa11003 Stream
0.63
2.5
4.7
0.01
Offsite Groundwater
0
0.10
1.7
0
Tota12
6.7
14
24
1.33
1- Historical Before remedies mass discharge values taken from mass loading model assessments conducted between
April 2020 to November 2022, which pre -date the installation of the groundwater extraction and barrier wall remedy
which significantly altered the hydrologic conditions at site.
2 - Total values for historical before remedies mass discharge come from individual mass loading model assessments
and therefore do not equal the sum of the values above.
TRI 156 -Cape Fear River PFAS Mass Loading Assessment First Quarter 2024 Report 10 June 2024

Appendix A: Cape Fear River PFAS Mass Loading Model
Transport Pathway
Onsite Groundwater
Seeps
Outfall 003 Stream
Upstream River Water and Groundwater
Willis Creek
Georgia Branch Creek
Outfall 002
Adjacent and Downstream Groundwater
Aerial Deposition on Water Features
Cape Fear River at Tar Heel
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O �
O �
O ❑®
® E3®m
E3 9D] ® m ❑
® 0®m
0 0.01 0.1 1 10 100
Total Table 3+ (17 Compounds) Mass Discharge (mg/s)
OHistorical Data - Before Remedies ■Tar Heel (Before Oct 1, 2020)
OQ1 2024 oTar Heel (January 24, 2024)
4.3 Variability in Input Parameters
The mass loading model assessments provide PFAS mass discharge estimates for a `snapshot' in
time. While controlling for temporal variability, the model -based mass discharge estimates contain
some level of uncertainty due to the inherent variability, and measurement error in the input
parameters (e.g., flow and concentrations).
TR 1 156 -Cape Fear River PFAS Mass Loading Assessment First Quarter 2024 Report J J June 2024

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5 SUMMARY
The objective of the mass loading model assessments is to provide HAS mass discharge estimates
for a `snapshot' in time. In Q 12024, 39 water samples collected from the PFAS transport pathways
(seeps, creeks, Outfall 003 Stream, Outfall 002, groundwater) were used to estimate the mass
discharge to the Cape Fear River. The model -estimated Total Table 3+ (17 compounds) mass
discharge from the potential transport pathways during Q1 2024 is 1.33 mg/s. The mass discharge
continues to be less than the after remedies mass discharge estimates from mass loading model
events prior to the operation of the groundwater extraction system. This quarter, the mass discharge
from Georgia Branch Creek was within the higher end of the range of previous events because the
flow volume was higher while the concentrations remained within the range of previous quarters.
The implementation of remedies (Outfall 003 treatment system, Seeps FTCs, and the groundwater
extraction and barrier wall remedy) show significant mass discharge decreases in Q1 2024
compared to historical, pre-remediation ranges. The pathways with remedies have substantially
lower mass discharges than the historical before remedies mass discharges. While the remaining
pathways have mass discharges that are within the range of historical discharge values, the mass
discharge at Georgia Branch Creek was at the higher end of the range of historical discharge values
because of the higher flow volume and not the concentration.
Quarterly sample collection and evaluation will continue through Q4 2025. The data will continue
to be incorporated into the mass loading model to estimate mass discharge to the Cape Fear River,
and sensitivity assessments on the model will continue to be evaluated annually.
TRI 156 -Cape Fear River PFAS Mass Loading Assessment First Quarter 2024 Report 12 June 2024

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Appendix A: Cape Fear River PFAS Mass LoadinjZ Model consultants
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REFERENCES
AECOM, 2018. Poly and Perfluoroalkyl Substance Quality Assurance Project Plan for the
Chemours Corporate Remediation Group. August 2018.
Geosyntec. 2019.On and Offsite Assessment. Chemours Fayetteville Works. September 30, 2019.
Geosyntec, 2020a. Cape Fear River Mass Loading Calculation Protocol Version 2, Chemours
Fayetteville Works. November 18, 2020.
Geosyntec. 2020b. Matrix Interference During Analysis of Table 3+ Compounds. Chemours
Fayetteville Works. June 30, 2020.
Geosyntec. 2020c. Cape Fear River Table 3+ PFAS Mass Loading Assessment — First Quarter
2020 Report, Chemours Fayetteville Works. July 31, 2020.
Geosyntec. 2020d. Cape Fear River PFAS Mass Loading Assessment — Second Quarter 2020
Report, Chemours Fayetteville Works. September 30, 2020.
Geosyntec. 2020e. Cape Fear River PFAS Mass Loading Assessment — Third Quarter 2020 Report,
Chemours Fayetteville Works. December 23, 2020.
Geosyntec, 2021 a. Cape Fear River PFAS Mass Loading Assessment — Fourth Quarter 2020
Report, Chemours Fayetteville Works. March 31, 2021.
Geosyntec, 2021b. Cape Fear River HAS Mass Loading Assessment— First Quarter 2021 Report,
Chemours Fayetteville Works. June 30, 2021.
Geosyntec 2021c. Cape Fear River PFAS Mass Loading Assessment Second Quarter 2021
Report, Chemours Fayetteville Works. September 30, 2021.
Geosyntec 2021 d. Cape Fear River PFAS Mass Loading Assessment — Third Quarter 2021 Report,
Chemours Fayetteville Works. December 23, 2021.
Geosyntec 2022a. Cape Fear River PFAS Mass Loading Assessment — Fourth Quarter 2021
Report, Chemours Fayetteville Works. March 31, 2022.
Geosyntec 2022b. Cape Fear River PFAS Mass Loading Assessment — First Quarter 2022 Report,
Chemours Fayetteville Works. June 30, 2022.
Geosyntec 2022c. Cape Fear River PFAS Mass Loading Assessment — Second Quarter 2022
Report, Chemours Fayetteville Works. September 30, 2022.
Geosyntec 2022d. Cape Fear River PFAS Mass Loading Assessment — Third Quarter 2022 Report,
Chemours Fayetteville Works. December 28, 2022.
Geosyntec 2023a. Cape Fear River PFAS Mass Loading Assessment Fourth Quarter 2022
Report, Chemours Fayetteville Works. March 31, 2023.
TRI 156 -Cape Fear River PFAS Mass Loading Assessment First Quarter 2024 Report 13 June 2024

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Geosyntec 2023b. Cape Fear River PFAS Mass Loading Assessment — First Quarter 2023 Report,
Chemours Fayetteville Works. June 29, 2023.
Geosyntec 2023c. Cape Fear River PFAS Mass Loading Assessment — Second Quarter 2023
Report, Chemours Fayetteville Works. September 29, 2023.
Geosyntec 2023d. Cape Fear River PFAS Mass Loading Assessment — Third Quarter 2023 Report,
Chemours Fayetteville Works. December 22, 2023.
Geosyntec. 2024a. Cape Fear River PFAS Mass Loading Assessment — Fourth Quarter 2023
Report, Chemours Fayetteville Works. March 28, 2024.
Geosyntec. 2024b. CFR Long -Term Remedy Performance Monitoring Report #5. Chemours
Fayetteville Works. June 27, 2024.
List of Attachments:
ATT1: Supplemental Tables to the Mass Loading Model
ATT2: Supporting Calculations — Direct Aerial Deposition on Cape Fear River
ATT3: Supporting Calculations — Onsite Groundwater Pathway
TRI 156 -Cape Fear River PFAS Mass Loading Assessment First Quarter 2024 Report 14 June 2024

TABLE Al Geosyntec Consultants NC, P.C.
PFAS MASS LOADING MODEL POTENTIAL PATHWAYS
Chemours Fayetteville Works, North Carolina
Transport
Pathway
potential PFAS Transport
I
Analytical Data Source for Mass Loading Model
1
Flow Data Source for Mass Loading Model
Number
pathway
Measured flow rates from USGS gauging station at W.O. Huske Dam during January
1
Upstream River and
Measured from Cape Fear River Mile 76 samples collected in January 2024
2024 volumetrically adjusted for flow pathways between River Mile 76 and W.O. Huske
Groundwater
as reported in Table A5.
2
Dam.
2
Willis Creek
Measured from Willis Creek samples collected in January 2024 as reported
Measured flow rates through Marsh-McBirney method during January 2024 as reported
in Table A5.
in Attachment ATTL
3
Aerial Deposition on River
Estimated from air deposition modeling3.
Estimated from air deposition modeling3.
4
Outfall 002
Measured from Outfall 002 samples collected in January 2024 as reported
Measured daily Outfall 002 flow rates recorded in Facility discharge monitoring reports,
in Table A5.
summarized in Attachment ATT 1.
Measured from monitoring well samples collected in January 2024 as
Estimated as the sum of the mass flux from the Black Creek Aquifer calculated from a
5
Onsite Groundwater
reported in Table A6.
transect along the Cape Fear River. Further details and supporting calculations provided
in Attachment ATT2.
Measured flow rates through bucket and time for Lock and Dam Seep during January
6
Seeps
Measured from Seeps A, B, C, D, and Lock and Dam Seep samples
2024 as reported in Appendix C. Flow -Through Cell flow data for Seeps A, B, C and D
collected in January 2024 as reported in Table A5.
were used as the flumes were decommisioned following Q2 2022 CAP sampling event.
No flow was observed at Seeps A, B, and D.
7
Outfall 003 Stream
Measured from Outfall 003 Stream samples collected in January 2024 as
Measured flow rates through Marsh-McBirney method during January 2024 as reported
reported in Table A5.
in Attachment ATTL
Adjacent and Downstream
Estimated using a scaling factor applied to upstream mass discharge. Refer
Estimated using a scaling factor applied to upstream mass discharge. Refer to Cape Fear
8
Groundwater
to Cape Fear River PFAS Mass Loading Calculation Protocol Version 2
River PFAS Mass Loading Calculation Protocol Version 2 (Geosyntec, 2020a) for
(Geosyntec, 2020a) for details.
details.
9
Georgia Branch Creek
Measured from Georgia Branch Creek samples collected in January 2024
Measured flow rates through Marsh-McBirney method during January 2024 as reported
as reported in Table A5.
I in Attachment ATTI.
Notes:
1 - Flow and concentration data are multiplied together to estimate the PFAS mass discharge in the Cape Fear River originating from each pathway.
2 - Cape Fear River flow rates measured at USGS gauging station #02105500 located at William O Huske Lock & Dam accessed from https://waterdata.usgs.gov.
3 - ERM, 2018. Modeling Report: HFPO-DA Atmospheric Deposition and Screening Groundwater Effects. 27 April 2018.
TR1156 Page 1 of 1 June 2024

TABLE A2
SURFACE WATER SAMPLE SUMMARY, FIELD PARAMETERS, AND FLOW MEASUREMENTS - Q1 2024
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Sample Collection and Field Parameters
Flow Measurement Method'
Pathway / Location
Location ID
Location Description
Sample ID
QA/QC
Dissolved
Specific
Instantaneous
Sample Date and
Sample Collection
Hours
pH
Oxygen
ORP
Turbidity
Conductivity
Temperature
Flow Measurement
Flow Rate
Time
Method
a
Composited
(5.U.)
(mg/L)
(mV)
(NTU)
(AS/cm)
(�C)
Method
ft3/8 3
Upstream River
Water and
CFR-RM-76
Cape Fear River Mile 76
CAP1Q24-CFR-RM76-012424
1/24/2024 9:15
Grab
0
7.49
6.9
110.6
33.2
628.6
8.93
USGS Data
10,844
Groundwater
Willis Creek
WC-6
Upstream of mouth of willis creek
CAP 1Q24-WC-6-24-012524
1/25/2024 7:00
Composite
24
5.54
9.59
30.4
4.52
196.99
10.31
Marsh-McBirney Flow
9.3
Water Drawn Through the Intake
Intake River Water
RIVER WATER
Sampled at the Power Area at the
RIVER-WATER-INTAKE2-24012524
1/25/2024 7:06
Composite
24
7.87
9.5
54
34.4
184.05
13.92
Facility DMRs
17
at Facility
INTAKE2
Site
Upstream of Outfall 002 in open
Outfall 002
OUTFALL-002
CAP 1Q24-OUTFALL-002-24012524
1/25/2024 7:24
Composite
24
7.8
9.43
78.5
29.7
178.97
14.49
Facility DMRs
25
channel
Seep A
SEEP -A
Effluent Basin of Seep A FTC
CAP 1 Q24-SEEP-A-EFF-24012524
1/25/2024 7:12
Composite
24
7.38
9.1
99.5
3.46
387.12
9.1
FTC'
0.078
Seep B
SEEP-B
Effluent Basin of Seep B FTC
CAP I Q24-SEEP-B-EFF-24012624
1/26/2024 8:47
Composite
24
8.22
8.59
94.8
40.8
159.8
12.43
FTC'
0.031
Seep C
SEEP-C
Effluent Basin of Seep C FTC
CAP I Q24-SEEP-C-EFF-24012524
1/25/2024 7:24
Composite
24
8.06
6.53
104
9.01
268.34
13.73
FTC'
0.050
Seep D
SEEP-D
Effluent Basin of Seep D FTC
CAP I Q24-SEEP-D-EFF-24012624
1/26/2024 8:30
Composite
24
8.21
8.47
114.8
10.8
135.68
10.91
FTC'
0.010
Souhside of the boat ramp at the
CAP1Q24-LOCK-DAM-SEEP012424
DUP/MS/MSD
1/24/2024 12:15
Grab
0
6.66
6.51
203
21.6
472.13
16.1
Bottle and Stopwatch
0.026
Lock and Dam Seep
LOCK -DAM -SEEP
Lock and Dam Seep
CAP I Q24-LOCK-DAM-SEEPO 12424-D
Field Duplciate
1/24/2024 12:15
Grab
0
6.66
6.51
203
21.6
472.13
16.1
Bottle and Stopwatch
0.026
Lock and Dam
Northside of the boat ramp at the
3
LOCK -DAM -NORTH
CAP 1Q24-LOCK-DAMNORTH-012424
--
--
--
--
--
--
--
--
--
--
Bottle and Stopwatch
--
North
Lock and Dam Seep
Outfall 003 Stream
OLDOF-lB
Mouth of Outfall 003 stream
CAP IQ24-OLDOF-1B-24012524
1/25/20247:36
Composite
24
8.08
8.43
4.9
5.21
290.47
17.59
Facility DMRs
0.1
Georgia Branch
GBC-5
Upstream of mouth of Georgia
CAP 1 Q24-GBC-5-012424
1/24/2024 12:10
Grab
0
6.29
9.73
78.5
2.68
134.88
18.82
Marsh-McBimey Flow
19
Creek
branch creek
Tar Heel Ferry Road
Cape Fear River at Tar Heel Ferry
CAP1Q24-CFR-TARHEEL-24012524
1/25/2024 10:24
Composite
24
7.54
9.8
118.8
39.2
126.47
14.81
USGS Data'
10,164
Bridge
CFR-TARHEEL
Road Bridge
a
CAP1Q24-CFR-TARHEEL012424
1/24/2024 14:10
Grab
0
7.23
10.86
79.7
64
153.74
13.34
USGS Data
10,900
Bladen Bluffs
CFR-BLADEN
Cape Fear River at Bladen Bluffs
CAPIQ24-CFRBLADEN-012424
1/24/2024 13:50
Grab
0
7.18
11.37
53.3
35.4
238.05
14.37
USGS Data?
10,800
Kings Bluffs
CFR-KINGS
Cape Fear River at Kings Bluff Raw
CAP1Q24-CFRKINGS-012524
1/25/2024 12:07
Grab
0
7.97
10.52
46.5
38.2
130.17
15.3
USGS Data'
11,200
Water
Notes:
1 - Flow measurement methods are described in Table Al. Supplemented flow measurement data are included in Attachment ATTI.
2 - Samples with a compositing duration of zero (0) hours are grab samples.
3 - No seep was found at Lock and Dam North. No sample was taken.
4 - The volumetric flow rate for upstream river water and groundwater was estimated by subtracting inflows from Willis Creek, upwelling groundwater, seeps to the river, and Outfall 002 and by adding the river water intake from Chemours to the flow rate measurement from the W.O. Huske Dam.
5 - FTCs were used as the flumes installed at the Seeps A, B, C, and D were decomissioned following Q2 2022 sampling event.
6 - Flow rate measured at USGS gauging station #02105500 located at William O Huske Lock & Dam used to estimate flow rate at Tar Heel Ferry Road Bridge during grab sample collection.
7 - Flow rate measured at USGS gauging station #02105500 located at William O Huske Lock & Dam used to estimate flow rate at Bladen Bluff during sample collection.
8 - Flow rate measured at USGS gauging station #02105769 located at Lock #1 near Kelly used to estimate flow rate at Kings Bluff during sample collection.
-- - not measured/not sampled
DMRs - Discharge Monitoring Reports
FTC - Flow -through cell
USGS - United States Geological Survey
°C - degrees Celsius
mg/L - milligrams per liter
µS/cm - microsiemens per centimeter
mV- millivolts
NTU - Nephelometric Turbidity Units
ORP - oxidation reduction potential
S.U. - Standard Units
TR1156 Page 1 of 1 June 2024

TABLE A3 Geosyntec Consultants of NC, P.C.
GROUNDWATER ELEVATIONS - Q] 2024
Chemours Fayetteville Works, North Carolina
Area
Water BearingUnit
Well ID
Gauging Date
Northing
(ft, SPCS NAD83)s
Easting
(it, SPCS NAD83)s
Screened Interval
(It)
TOC Elevation
(it, NAVD 88)°
Depth to Water
(It from TOC)
Water Level (it,
NAVD88)°
Onsite
Black Creek Aquifer
BCA-01
01/11/24
399779.96
2050662.48
91-101
146.25
66.78
79.47
Onsite
Black Creek Aquifer
BCA-02
01/11/24
396242.02
2051062.07
92-102
148.37
78.22
70.15
Onsite
Black Creek Aquifer
BCA-03R
01/11/24
398582.23
2049522.22
88-98
150.82
56.42
94.40
Onsite
Black Creek Aquifer
BCA-04
01/11/24
395877.67
2047823.03
94-104
150.31
34.49
115.82
Offsite
Black Creek Aquifer
BLADEN-1DR
01/11/24
387522.25
2050247.40
NM
76.54
19.28
57.26
Offsite
Surficial Aquifer
BLADEN-IS
01/11/24
387518.97
1 2050233.35
5-10
76.74
10.15
66.59
Offsite
Black Creek Aquifer
BLADEN-213
01/11/24
368827.09
2042878.34
70-75
138.27
18.41
119.86
Offsite
Surficial Aquifer
BLADEN-2S
01/11/24
368821.46
2042882.92
10-20
138.04
3.93
134.11
Offsite
Black Creek Aquifer
BLADEN-313
01/11/24
396856.98
2059006.56
33.75-43.75
75.52
9.82
65.70
Offsite
Surficial Aquifer
BLADEN-3S
01/11/24
396862.31
2059012.93
5-15
74.27
7.75
66.52
Offsite
Black Creek Aquifer
BLADEN-413
01/11/24
363255.12
2087636.87
46.75-51.75
59.66
1.10
58.56
Offsite
Surficial Aquifer
BLADEN-4S
01/11/24
363263.19
2087637.46
4.75-14.75
59.68
4.89
54.79
Offsite
Black Creek Aquifer
CUMBERLAND-113
01/11/24
431459.95
2011071.39
40-50
174.60
4.08
170.52
Offsite
Surficial Aquifer
CUMBERLAND-IS
01/11/24
431459.95
2011071.39
15-25
174.73
3.30
171.43
Offsite
Black Creek Aquifer
CUMBERLAND-213
01/11/24
449987.54
2074019.14
47-57
129.23
3.28
125.95
Offsite
Surficial Aquifer
CUMBERLAND-2S
01/11/24
449979.10
2074020.86
7-17
129.06
2.28
126.78
Offsite
Black Creek Aquifer
CUMBERLAND-313
01/11/24
423248.12
2060409.16
22-27
78.79
7.21
71.58
Offsite
Surficial Aquifer
CUMBERLAND-3S
01/11/24
423254.64
2060413.30
9-14
79.06
6.66
72.40
Offsite
Black Creek Aquifer
CUMBERLAND4D
01/11/24
413095.77
2078249.95
57-67
119.22
14.45
104.77
Offsite
Surficial Aquifer
CUMBERLAND4S
01/11/24
413086.63
2078255.53
10-20
119.36
7.27
112.09
Offsite
Black Creek Aquifer
CUMBERLAND-5DR
01/11/24
405619.17
2138238.59
NM
106.67
8.12
98.63
Offsite
Surficial Aquifer
CUMBERLAND-5S
01/11/24
405623.27
2138233.37
14-24
106.65
3.21
103.44
Onsite
Black Creek Aquifer
EW-1
NM
399934.65
2051297.51
40-60
91.33
NM
NM
Onsite
Black Creek Aquifer
EW-2
NM
396164.48
2052232.61
40-65
77.25
NM
NM
Onsite
Black Creek Aquifer
EW-3
NM
395059.78
2052214.66
37-67
76.48
NM
NM
Onsite
Black Creek Aquifer
EW4
NM
398581.51
2051805.58
53-73
80.64
NM
NM
Onsite
Black Creek Aquifer
EW-5
NM
397200.16
2052052.65
37-67
78.50
NM
NM
Onsite
Perched Zone
FTA-01
01/11/24
397906.09
2049370.01
12.0-22.0
149.60
16.85
132.75
Onsite
Perched Zone
FTA-02
01/11/24
397784.99
2049203.29
11.5-22.0
149.30
17.84
131.46
Onsite
Perched Zone
FTA-03
01/11/24
397766.23
2049310.46
12.0-22.0
150.10
17.99
132.11
Onsite
Surficial Aquifer
INSHU-01
01/11/24
401657.39
2046078.99
7.0-17.0
89.12
5.88
83.24
Onsite
Surficial Aquifer
INS1TU-02
01/11/24
401863.46
2049136.62
7.0-17.0
113.12
NM
NM
Onsite
Floodplain Deposits
LTW-01
01/11/24
399565.01
2052150.62
11.0-26.0
52.71
17.93
34.78
Onsite
Black Creek Aquifer
LTW-02
01/11/24
398847.57
2052355.48
28.0-38.0
51.39
10.92
40.47
Onsite
Floodplain Deposits
LTW-03
01/11/24
398114.45
2052558.35
15.0-30.0
51.75
14.83
36.92
Onsite
Floodplain Deposits
LTW-04
01/11/24
397279.61
2052584.95
12.0-27.0
50.66
12.14
38.52
Onsite
Black Creek Aquifer
LTW-05
01/11/24
396430.31
2052740.40
29.044.0
50.94
11.20
39.74
Onsite
Perched Zone
MW-11
01/11/24
396544.40
2049051.06
11.5-21.5
148.53
23.65
124.88
Onsite
Perched Zone
MW-12S
01/11/24
397262.90
2049269.37
17.5-22.5
151.08
21.03
130.05
Onsite
Surficial Aquifer
MW-13D
01/11/24
397119.02
2049821.12
57-67
148.65
49.35
99.30
Onsite
Surficial Aquifer
MW-14D
01/11/24
396974.49
2049074.56
62-72
149.73
45.76
103.97
Onsite
Surficial Aquifer
MW-15DRR
01/11/24
398580.71
2049511.75
52.5-62.5
150.92
53.81
97.11
Onsite
Surficial Aquifer
MW-16D
01/11/24
398493.70
2048402.84
72-82
148.41
41.92
106.49
Onsite
Surficial Aquifer
MW-17D
01/11/24
398401.74
2047366.50
57-67
146.12
35.62
110.50
Onsite
Surficial Aquifer
MW-18D
01/11/24
400947.30
2046574.35
50-60
108.10
24.26
83.84
Onsite
Surficial Aquifer
MW-19D
01/11/24
401151.43
2048272.93
46-56
139.36
56.77
82.59
Onsite
Perched Zone
MW-IS
01/11/24
397080.69
2049117.99
21.0-24.0
148.88
19.23
129.65
Onsite
Surficial Aquifer
MW-20D
01/11/24
400791.01
2048733.71
65-75
137.20
53.26
83.94
Onsite
Surficial Aquifer
MW-21D
01/11/24
399501.88
2047074.92
72-82
151.42
50.86
100.56
Onsite
Surficial Aquifer
MW-22D
01/11/24
398518.40
2048362.48
52-72
149.09
41.85
107.24
Onsite
Perched Zone
MW-23
01/11/24
396237.61
2051063.25
9.5-14.5
148.34
14.66
133.68
Onsite
Perched Zone
MW-24
01/11/24
397303.94
2048767.69
18.8-23.8
150.31
22.07
128.24
Onsite
Perched Zone
MW-25
01/11/24
396753.37
2050989.82
12-17
147.59
14.10
133.49
Onsite
Perched Zone
MW-26
01/11/24
396265.18
2051484.67
5-10
147.70
DRY
DRY
Onsite
Perched Zone
MW-27
01/11/24
396010.33
2051472.00
10-15
146.83
14.30
132.53
Onsite
Perched Zone
MW-28
01/11/24
395719.79
2051165.93
9-14
144.70
13.56
131.14
Onsite
Perched Zone
MW-30
01/11/24
397340.79
2050776.09
10-15
147.67
12.99
134.68
Onsite
Perched Zone
MW-31
01/11/24
396390.70
2049622.88
17-22
147.70
NM
NM
Onsite
Perched Zone
MW-32
01/11/24
396359.58
2049651.79
13-18.5
147.11
NM
NM
Onsite
Perched Zone
MW-33
01/11/24
396337.51
2049678.56
12-17
146.82
NM
NM
Onsite
Perched Zone
MW-34
01/11/24
396352.90
2049619.09
17-22
147.97
NM
NM
Onsite
Perched Zone
MW-35
01/11/24
396332.94
2049631.16
14-19
147.54
NM
NM
Onsite
Perched Zone
MW-36
01/11/24
396320.09
2049651.17
12-17
147.89
NM
NM
Onsite
Perched Zone
MW-7S
01/11/24
397444.52
2049809.73
NM
147.47
10.95
136.52
Onsite
Perched Zone
MW-8S
01/11/24
397096.48
2049867.77
NM
146.48
NM
NM
Onsite
Perched Zone
MW-9S
01/11/24
396760.16
2049734.30
17.5-22.5
154.39
21.65
132.74
Onsite
Perched Zone
NAF-01
01/11/24
398348.58
2050339.68
5.0-15.0
148.65
9.86
138.79
Onsite
Perched Zone
NAF-02
01/11/24
398660.16
2050634.55
5.0-15.0
149.28
10.40
138.88
Onsite
Perched Zone
NAF-03
01/11/24
398578.63
2050743.04
5.0-15.0
149.41
10.51
138.90
Onsite
Perched Zone
NAF-04
01/11/24
398445.89
2050713.13
5.0-15.0
146.77
6.89
139.88
Onsite
Perched Zone
NAF-06
01/11/24
398808.81
2050913.93
2.75-12.75
145.43
11.15
134.28
Onsite
Perched Zone
NAF-07
01/11/24
398898.69
2050618.12
5.5-15.5
149.03
9.06
139.97
Onsite
Perched Zone
NAF-08A
01/11/24
398098.22
2050886.93
5.0-15.0
147.74
7.90
139.84
Onsite
Surficial Aquifer
NAF-08B
01/11/24
398095.97
2050880.18
43.5-53.5
147.83
56.46
91.37
Onsite
Perched Zone
NAF-09
01/11/24
397708.78
2050807.44
7.0-17.0
148.62
12.19
136.43
Onsite
Perched Zone
NAF-10
01/11/24
397611.81
2050425.20
8.25-18.25
149.25
11.95
137.30
Onsite
Perched Zone
NAF-11A
01/11/24
398907.08
2050999.77
2.5-7.5
139.74
5.49
134.25
Onsite
Surficial Aquifer
NAF-11B
01/11/24
398911.13
2050995.88
33.5-43.5
140.74
DRY
DRY
Onsite
Perched Zone
NAF-12
01/11/24
398270.56
2050777.49
18-23
145.79
6.89
138.90
Onsite
Black Creek Aquifer
OW-1
01/11/24
399930.53
2051287.87
40-50
95.01
38.03
56.98
Onsite
Black Creek Aquifer
OW-10
01/11/24
399948.17
2051291.21
40-50
94.39
37.39
57.00
Onsite
Black Creek Aquifer
OW-11
01/11/24
401683.39
2049913.61
74-84
94.92
48.68
46.24
Onsite
Black Creek Aquifer
OW-12
01/11/24
401731.33
2050721.09
50-60
83.65
49.77
33.88
Onsite
Black Creek Aquifer
OW-13
01/11/24
400769.33
2051210.62
50-60
85.12
51.98
33.14
Onsite
Black Creek Aquifer
OW-14
01/11/24
400311.42
2051608.03
46-56
80.67
46.57
34.10
Onsite
Black Creek Aquifer
OW-15
01/11/24
399719.91
2051608.62
34-44
87.86
30.83
57.03
Onsite
Black Creek Aquifer
OW-16
01/11/24
399828.66
2051993.25
15-25
52.94
17.61
35.33
Onsite
Black Creek Aquifer
OW-17
01/11/24
399433.03
2051661.47
58-68
89.67
56.68
32.99
Onsite
Black Creek Aquifer
OW-18
01/11/24
398846.69
2051836.19
45-55
90.88
44.41
46.47
Onsite
Black Creek Aquifer
OW-19
01/11/24
398067.23
2051976.50
70-80
86.68
56.51
30.17
TRl 156 Page 1 of 3 June 2024

TABLE A3 Geosyntec Consultants of NC, P.C.
GROUNDWATER ELEVATIONS - Ql 2024
Chemours Fayetteville Works, North Carolina
Area
Water BearingUnitt
Well ID
Gauging Date
Northing
(ft, SPCS NAD83)t
Easting
(it SPCS NAD83)e
Screened Interval
(ft)
TOC Elevation
(it, NAVD 88)°
Depth to Water
(ft from TOC)
Water Level (it,
NAVD88)°
Onsite
Black Creek Aquifer
OW-2
01/11/24
398572.28
2051801.62
63-73
84.37
49.83
34.54
Onsite
Black Creek Aquifer
OW-20
01/11/24
398229.85
2052080.86
48-58
69.59
30.51
39.08
Onsite
Black Creek Aquifer
OW-21
01/11/24
397521.83
2051950.75
57-67
80.85
49.86
30.99
Onsite
Black Creek Aquifer
OW-22
01/11/24
397325.34
2052218.74
43-53
66.63
27.61
39.02
Onsite
Black Creek Aquifer
OW-23
01/11/24
396776.73
2052355.66
45-55
67.83
28.84
38.99
Onsite
Black Creek Aquifer
OW-24
01/11/24
396677.42
2052158.17
50-60
78.67
49.73
28.94
Onsite
Black Creek Aquifer
OW-25
01/11/24
396182.38
2052428.46
45-55
70.91
31.20
39.71
Onsite
Black Creek Aquifer
OW-26
01/11/24
395503.74
2052268.81
50-60
80.85
38.90
41.95
Onsite
Black Creek Aquifer
OW-27
01/11/24
395555.17
2052622.16
33-43
55.60
15.31
40.29
Onsite
Black Creek Aquifer
OW-28
01/11/24
395570.57
2052838.21
20-30
48.49
8.05
40.44
Onsite
Black Creek Aquifer
OW-29
01/11/24
395193.45
2052143.81
42-52
85.67
41.36
44.31
Onsite
Black Creek Aquifer
OW-3
01/11/24
398601.08
2051812.32
63-73
84.64
50.30
34.34
Onsite'
Black Creek Aquifer
OW-30
01/11/24
394988.72
2052537.53
49-59
70.92
30.83
40.09
Onsite
Black Creek Aquifer
OW-31
01/11/24
394812.07
2051595.90
85-95
106.10
66.33
39.77
Onsite'
Black Creek Aquifer
OW-33
01/11/24
395116.90
2052806.54
19-29
48.59
8.22
40.37
Onsite
Surficial Aquifer
OW-34
01/11/24
398593.54
2051813.31
23-33
83.76
16.04
67.72
Onsite
Surficial Aquifer
OW-35
01/11/24
398060.78
2051977.75
20-30
87.45
18.93
68.52
Onsite
Surficial Aquifer
OW-36
01/11/24
397257.46
2051997.45
11-21
80.61
18.31
62.30
Onsite
Black Creek Aquifer
OW-38
01/11/24
394885.22
2051883.97
60-70
123.70
61.64
62.06
Onsite
Black Creek Aquifer
OW-4
NM
395049.16
2052210.81
47-57
80.85
NM
NM
Onsite'
Black Creek Aquifer
OW-40
01/11/24
394588.05
2052521.39
49-59
72.88
32.32
40.56
Onsite
Black Creek Aquifer
OW-01
01/11/24
401683.74
2050119.92
82-92
93.66
47.70
45.96
Onsite
Black Creek Aquifer
OW-02
01/11/24
401696.05
2050448.24
58-68
87.37
41.72
45.65
Onsite
Black Creek Aquifer
OW-03
01/11/24
400937.73
2051116.17
40-50
76.94
44.87
32.07
Onsite
Black Creek Aquifer
OW-04
01/11/24
399741.48
2051736.45
34-44
73.18
38.46
34.72
Onsite
Black Creek Aquifer
OW-05
01/11/24
398836.07
2051955.99
50-60
77.10
36.73
40.37
Onsite
Black Creek Aquifer
OW-06
01/11/24
398164.94
2052050.69
59-69
72.05
32.99
39.06
Onsite
Black Creek Aquifer
OW-47
01/11/24
397243.89
2052136.32
49-59
71.47
32.71
38.76
Onsite
Black Creek Aquifer
OW-48
01/11/24
396698.39
2052275.93
42-52
69.54
30.61
38.93
Onsite
Black Creek Aquifer
OW-49
01/11/24
396180.56
2052348.51
53-63
79.56
39.90
39.66
Onsite
Black Creek Aquifer
OW-5
01/11/24
395070.03
2052196.97
54-64
81.61
NM
NM
Onsite
Black Creek Aquifer
OW-55
01/11/24
401761.92
2050875.02
43-58
75.45
43.04
32.41
Onsite
Black Creek Aquifer
OW-57
01/11/24
401781.20
2050174.65
33-43
68.87
24.04
44.83
Onsite
Black Creek Aquifer
OW-6
01/11/24
396168.41
2052223.54
50-60
80.53
NM
NM
Onsite
Black Creek Aquifer
OW-7
01/11/24
397180.06
2052052.69
57-67
81.45
51.06
30.39
Onsite
Black Creek Aquifer
OW-8
01/11/24
397202.33
2052041.98
57-67
82.30
52.69
29.61
Onsite
Black Creek Aquifer
OW-9
01/11/24
395075.14
2052211.07
54-64
79.78
NM
NM
Onsite
Black Creek Aquifer
PIW-IODR
O1/11/24
395093.99
2052297.30
53-58
75.91
35.13
40.78
Onsite
Surficial Aquifer
PIW-10S
O1/11/24
395104.95
2052296.98
7-17
76.32
19.84
56.48
Onsite
Black Creek Aquifer
PIW-ll
01/11/24
401911.03
2050416.29
47-57
67.02
23.18
43.84
Onsite
Black Creek Aquifer
PIW-12
01/11/24
401703.10
2051025.77
64-74
83.78
52.96
30.82
Onsite
Black Creek Aquifer
PIW-13
01/11/24
401464.29
2051122.60
54-64
83.18
55.31
27.87
Onsite
Black Creek Aquifer
PIW-14
01/11/24
401163.98
2051186.57
56-66
87.43
56.94
30.49
Onsite
Black Creek Aquifer
PIW-15
01/11/24
400706.51
2051532.80
34-44
67.85
32.87
34.98
Onsite
Black Creek Aquifer
PIW-16D
O1/11/24
396257.96
2046587.07
90-100
150.06
26.63
123.43
Onsite
Surficial Aquifer
PIW-16S
O1/11/24
396267.84
2046586.09
35-45
149.74
23.04
126.70
Onsite
Black Creek Aquifer
PIW-ID
O1/11/24
400548.00
2051801.28
24.5-29.5
52.16
18.39
33.77
Onsite
Floodplain Deposits
PIW-IS
O1/11/24
400541.03
2051792.39
7.8-17.8
54.04
20.67
33.37
Onsite
Black Creek Aquifer
PIW-2D
O1/11/24
399925.40
2051315.80
40-50
96.19
39.22
56.97
Onsite
Black Creek Aquifer
PIW-3D
O1/11/24
399711.25
2052086.94
19-24
53.42
18.33
35.09
Onsite
Black Creek Aquifer
PIW-4D
O1/11/24
398816.52
2052101.94
32.3-37.3
52.85
12.59
40.26
Onsite
Surficial Aquifer
PIW-5SR
O1/11/24
398545.10
2051977.53
9.8-19.8
79.02
DRY
DRY
Onsite
Floodplain Deposits
PIW-6S
O1/11/24
398117.93
2052539.79
18-28
53.40
16.46
36.94
Onsite
Black Creek Aquifer
PIW-7D
O1/11/24
396787.77
2052595.65
29-34
48.93
9.80
39.13
Onsite
Floodplain Deposits
PIW-7S
01/11/24
396786.97
2052589.10
7-17
47.97
9.37
38.60
Onsite
Black Creek Aquifer
PIW-8D
O1/11/24
396403.37
2052682.10
35.5-40
48.66
8.90
39.76
Onsite
Black Creek Aquifer
PIW-91)
O1/11/24
396155.84
2052250.84
40-05
79.64
NM
NM
Onsite
Surficial Aquifer
PIW-9S
01/11/24
396148.52
2052251.03
24.8-29.8
79.64
NM
NM
Onsite
Perched Zone
PW-01
01/11/24
399064.80
2049654.30
11-21
149.55
15.08
134.47
Onsite
Surficial Aquifer
PW-02
01/11/24
399779.06
2050649.47
50-60
146.43
43.17
103.26
Onsite
Surficial Aquifer
PW-03
01/11/24
397339.81
2050765.32
35-45
147.97
44.12
103.85
Onsite
Surficial Aquifer
PW-04
01/11/24
394659.55
2050940.66
17-27
97.75
29.06
68.69
Onsite
Surficial Aquifer
PW-05
01/11/24
395873.10
2047812.93
65-75
150.34
35.91
114.43
Onsite
Surficial Aquifer
PW-06
01/11/24
392868.00
2045288.77
19-29
147.69
21.01
126.68
Onsite
Surficial Aquifer
PW-07
01/11/24
390847.71
2049258.26
28-38
148.16
41.11
107.05
Onsite
Black Creek Aquifer
PW-09
01/11/24
402000.08
2048979.11
44-54
72.93
25.22
47.70
Onsite
Black Creek Aquifer
PW-IORR
O1/11/24
398532.45
2051965.91
57-67
79.97
40.39
39.58
Onsite
Black Creek Aquifer
PW-l1
01/11/24
394354.36
2052226.72
53-63
73.26
32.62
40.64
Onsite
Black Creek Aquifer
PW-12
01/11/24
399500.45
2047063.51
109-119
150.61
62.64
87.97
Onsite
Black Creek Aquifer
PW-13
01/11/24
397584.26
2048029.18
120-130
149.36
39.18
110.18
Onsite
Black Creek Aquifer
PW-14
01/11/24
397325.65
2050766.36
136-146
147.97
56.72
91.25
Onsite
Black Creek Aquifer
PW-15R
01/11/24
398900.88
2051011.75
110-120
136.14
66.53
69.61
Onsite
Surficial Aquifer
PZl
01/11/24
394928.45
2051910.97
28-38
126.65
NM
NM
Onsite
Perched Zone
PZII
01/11/24
398646.25
2049820.94
15-20
151.03
10.78
140.25
Onsite
Perched Zone
PZ72
01/11/24
399091.19
2048978.89
15.1-20.1
149.89
19.70
130.19
Onsite
Perched Zone
PZ73
01/11/24
397707.82
2050985.25
7.1-12.1
148.14
11.54
136.60
Onsite
Perched Zone
PZ14
01/11/24
397589.92
2050618.27
9.0-14.0
148.38
12.00
136.38
Onsite
Perched Zone
PZ15
01/11/24
396806.39
2050107.50
10.2-15.2
147.76
13.57
134.19
Onsite
Perched Zone
PZ17
01/11/24
396614.82
2048872.69
21.1-26.1
150.08
NM
NM
Onsite
Perched Zone
PZ-19R
O1/11/24
397998.66
2049919.52
16-21
150.05
14.08
135.97
Onsite
Surficial Aquifer
PZ2
01/11/24
396631.77
2052167.77
15-25
78.05
NM
NM
Onsite
Perched Zone
PZ20R
O1/11/24
398185.81
2049784.60
15-20
151.29
15.48
135.81
Onsite
Perched Zone
PZ-21R
O1/11/24
398445.16
2049883.13
17-22
150.67
13.61
137.06
Onsite
Black Creek Aquifer
PZ22
01/11/24
397271.94
2052585.34
42.547.5
50.70
11.75
38.95
Onsite
Perched Zone
PZ24
01/11/24
396117.94
2050744.07
11-16
147.53
14.13
133.40
Onsite
Perched Zone
PZ25R
01/11/24
395971.54
2050748.23
NM
147.51
NM
NM
Onsite
Perched Zone
PZ26
01/11/24
396059.78
2050382.35
11-16
147.70
12.80
134.90
Onsite
Perched Zone
PZ27
01/11/24
395922.11
2050376.76
12-17
147.17
14.23
132.94
Onsite
Perched Zone
PZ28
01/11/24
396304.55
2049933.79
13-18
148.64
13.26
135.38
Onsite
Perched Zone
PZ29
01/11/24
396377.59
2049771.59
12-18
147.74
NM
NM
TRl 156 Page 2 of 3 June 2024

TABLE A3 Geosyntec Consultants of NC, P.C.
GROUNDWATER ELEVATIONS - Ql 2024
Chemours Fayetteville Works, North Carolina
Area
Water Bearing Unit'
Well ID
Gauging Date
Northing ,
(ft, SPCS NAD83)
Easting s
(it, SPCS NAD83)
Screened Interval
(ft)
TOC Elevation
(it, NAVD 88)
Depth to Water
(ft from TOC)
Water Level (it,
NAVD88)
Onsite
Perched Zone
PZ-31
01/11/24
396428.73
2049594.36
14-19
148.00
NM
NM
Onsite
Perched Zone
PZ32
01/11/24
396418.47
2049713.79
13-18
148.47
NM
NM
Onsite
Perched Zone
PZ33
01/11/24
396308.92
2049707.66
12.5-17.5
146.72
NM
NM
Onsite
Perched Zone
PZ34
01/11/24
396292.05
2049595.04
13.5-18.5
147.70
NM
NM
Onsite
Perched Zone
PZ35
01/11/24
398232.64
2050020.49
13-18
150.43
13.79
136.64
Onsite
Perched Zone
PZ36
01/11/2403960121..4621
17
2051331.44
5-8.5
135.20
NM
NM
Onsite
Perched Zone
PZ37
01/11/2440
2051050.05
5-8
135.56
NM
NM
Onsite
Perched Zone
PZ38
01/11/2401
2050569.66
5-9
137.34
NM
NM
Onsite
Perched Zone
PZ39
01/11/2487
2050238.18
5-10
137.93
NM
NM
Onsite
Perched Zone
PZAO
01/11/2402
2050031.90
5-9
138.51
NM
NM
Onsite
Perched Zone
PZA1
01/11/2429
2050048.97
5-8.5
138.13
NM
NM
Onsite
Perched Zone
PZA2
01/11/2473
2050230.23
3-7
138.17
NM
NM
Onsite
Pcrchcd Zone
PZA3
01/11/2461
2050567.89
5-9
137.06
NM
NM
Onsite
Perched Zone
PZA4
01/11/24
396082.75
2051045.25
5-7
136.26
NM
NM
Onsite
Perched Zone
PZA5
01/11/24
396124.41
2051323.03
24
135.69
NM
NM
Onsite
Surficial Aquifer
PZL
01/11/24
396745.80
2048684.01
13-28
147.86
DRY
DRY
Offaite
Black Creek Aquifer
ROBESON-1D
01/11/24
381416.28
2020158.93
42.75-52.75
156.36
13.02
143.34
Offsite
Surficial Aquifer
ROBESON-IS
01/11/24
381408.19
2020156.86
17-27
156.66
11.51
145.15
Onsite
Surficial Aquifer
SMW-01
01/11/24
395297.97
2043688.29
5.0-15.0
150.58
13.61
136.97
Onsite
Perched Zone
SMW-02
01/11/24
399982.23
2050655.91
5.0-20.0
144.59
DRY
DRY
Onsite
Surficial Aquifer
SMW-02B
01/11/24
399983.75
2050654.77
43.0-53.0
147.93
DRY
DRY
Onsite
Perched Zone
SMW-03
01/11/24
399779.32
2049445.32
10.0-20.0
151.09
NM
NM
Onsite
Black Creek Aquifer
SMW-03B
01/11/24
399785.75
2049421.54
72-82
150.43
65.01
85.42
Onsite
Perched Zone
SMW-04A
01/11/24
399668.71
2048387.57
19.5-34.5
148.09
DRY
DRY
Onsite
Surficial Aquifer
SMW-04B
01/11/24
399666.21
2048392.37
43.0-53.0
147.65
51.88
95.77
Onsite
Perched Zone
SMW-05
01/11/24
399334.07
2048557.33
10.0-20.0
148.10
NM
NM
Onsite
Surficial Aquifer
SMW-05PR
01/11/24
399391.46
2049235.07
45.0-60.0
149.66
50.43
99.23
Onsite
Perched Zone
SMW-06
01/11/24
399172.35
2048759.48
12.0-22.0
150.97
NM
NM
Onsite
Surficial Aquifer
SMW-06B
01/11/24
399144.74
2048764.94
58-68
150.32
53.78
96.54
Onsite
Perched Zone
SMW-07
01/11/24
398931.13
2048611.74
13.0-23.0
146.79
19.35
127.44
Onsite
Perched Zone
SMW-08
01/11/24
399064.97
2048468.78
21.0-31.0
151.02
NM
NM
Onsite
Surficial Aquifer
SMW-08B
01/11/24
399058.33
2048478.84
58-68
148.81
46.96
101.85
Onsite
Surficial Aquifer
SMW-09
01/11/24
401076.89
2050017.41
52-62
141.43
62.05
79.38
Onsite
Black Creek Aquifer
SMW-10
01/11/24
402307.31
2047923.84
39-49
76.26
29.47
46.79
Onsite
Surficial Aquifer
SMW-11
01/11/24
401996.15
2048975.38
13-23
71.95
16.02
55.93
Onsite
Black Creek Aquifer
SMW-12
01/11/24
401314.20
2051007.22
88-98
118.22
89.25
28.97
Notes:
1 - Area - refers to location of well within site property boundary (`Onsite") and outside property boundary ("Offsite").
2 - Water Bearing Unit - refers to primary aquifer unit well screen is estimated to be screened within.
3 - Northing and Easting provided in North Carolina State Plane System (wne 3200), North American Datum 1983.
4 - Vertical datum is North American Vertical Datum of 1988.
5 - OW-30, OW-33, and OW-40 are within the USACE property but are labeled as onsite wells.
DRY - Well was dry at time of monitoring event.
ft - feet
NAVD88 - North American Vertical Datum of 1988
NM - Not measured, well inaccessible during monitoring event.
SPCS NAD83 - State Plane Coordinate System North American Datum 1983
TOC - top of casing
TR1156 Page 3 of 3 June 2024

TABLE A4
GROUNDWATER SAMPLE SUMMARY, FIELD PARAMETERS, AND FLOW MEASUREMENTS - Q1 2024
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Area
Location ID
Water Bearing Unit
Adjacent Surface Water Feature
Synoptic Water
Level Date
Sample ID
QA/QC
Sample Collection and Field Parameters
Sample Date and
Time
PH (S.U.)
Dissolved Oxygen
(mg/L)
ORP (mV)
Turbidity
(NTU)
Specific Conductivity
(Its/cm)Temperature
(°C)
Offsite
BLADEN-1DR
Black Creek Aquifer
Georgia Branch Creek
1/11/2024
CAP1Q24-BLADEN-1DR011524
1/15/2024 10:25
5.71
0.02
28.50
5.04
66.87
17.17
Onsite
LTW-01
Floodplain Deposits
Cape Fear River
1/11/2024
CAP I Q24-LTW-0 1 -0 11724
1/17/2024 13:40
4.21
1.69
273.20
11.60
116.19
14.92
Onsite
LTW-02
Black Creek Aquifer
Cape Fear River
1/11/2024
CAP I Q24-LTW-02-011724
1/17/202412:40
4.95
0.10
134.90
3.39
83.42
16.03
Onsite
LTW-03
Floodplain Deposits
Cape Fear River
1/11/2024
CAP I Q24-LTW-03-013124
1/31/2024 11:05
4.31
0.54
279.20
16.10
106.00
15.24
Onsite
LTW-04
Floodplain Deposits
Cape Fear River
1/11/2024
CAP I Q24-LTW-04-011624
1/16/2024 13:05
4.78
0.11
223.80
15.20
70.70
15.88
Onsite
LTW-05
Black Creek Aquifer
Cape Fear River
1/11/2024
CAP I Q24-LTW-05-011524
1/15/2024 12:19
4.43
0.00
204.50
17.40
137.74
17.78
Onsite
OW-28
Black Creek Aquifer
Cape Fear River
1/11/2024
CAPIQ24-OW-28-011824
1/18/202412:06
4.56
0.04
106.60
0.63
47.66
15.53
Onsite
OW-33
Black Creek Aquifer
Cape Fear River
1/11/2024
CAPIQ24-OW-33-013024
1/30/202412:14
4.38
0.14
210.60
4.09
64.76
17.05
Onsite
PIW-lD
Black Creek Aquifer
Cape Fear River / Willis Creek
1/11/2024
CAP IQ24-PIW-1D-012224
1/22/2024 12:04
3.78
0.00
286.90
5.84
174.25
15.95
Onsite
PIW-lS
Floodplain Deposits
Cape Fear River / Willis Creek
1/11/2024
CAP1Q24-PIW-lS-011624
1/16/2024 15:47
3.8
2.71
311
3.35
213.57
14.28
Onsite
PIW-3D
Black Creek Aquifer
Cape Fear River
1/11/2024
CAP IQ24-PIW-3D-011824
1/18/2024 13:21
5.78
0.07
18.40
2.30
102.68
16.26
Onsite
PIW-7D
Black Creek Aquifer
Cape Fear River
1/11/2024
CAP I Q24-PIW-7D-0 11524
DUP/MS/MSD
1/15/2024 13:11
4.39
0.00
-0.80
0.99
113.51
17.30
1/11/2024
CAP1Q24-PIW-7D-011524-D
Field Duplicate
1/15/202413:11
4.39
0.00
-0.80
0.99
113.51
17.30
Onsite
PIW-7S
Floodplain Deposits
Cape Fear River
1/11/2024
CAP1Q24-PIW-7S-011524
1/15/2024 15:20
5.65
0.00
90.31
8.06
139.69
17.07
Onsite
PW-04
Surficial Aquifer
Outfall003
1/11/2024
CAP I Q24-PW-04-011724-Z
1/17/202415:55
3.86
8.11
362.10
40.60
539.05
13.70
Onsite
PW-06
Surficial Aquifer
Georgia Branch Creek
1/11/2024
CAP1Q24-PW-06-011524
1/15/2024 14:35
4.43
5.52
315.10
1.57
53.74
17.28
Onsite
PW-07
Surficial Aquifer
Georgia Branch Creek
1/11/2024
CAP1Q24-PW-07-020724
2/7/2024 10:40
9.06
12.28
-31.90
134.00
408.93
14.43
Onsite
PW-09
Black Creek Aquifer
Willis Creek
1/11/2024
CAPIQ24-PW-09-092324
DUP/MS/MSD
1/23/2024 14:40
6.61
0.13
-63.5
19.4
67.32
16.87
1/11/2024
CAP I Q24-PW-09-092324-D
Field Duplicate
1/23/202414:40
6.61
0.13
-63.5
19.4
67.32
16.87
Onsite
PZ-22
Black Creek Aquifer
Cape Fear River
1/11/2024
CAPIQ24-PZ-22-011624
1/16/2024 15:20
4.57
0.15
76.30
9.44
82.41
15.30
Onsite
SMW-10
Black Creek Aquifer
Willis Creek
1/11/2024
CAPIQ24-SMW-10-011724
1/17/202414:39
5.71
0.00
-60.40
16.30
113.40
12.62
Onsite
SMW-II
Surficial Aquifer
Willis Creek
1/11/2024
CAPIQ24-SMW-11-011824
1/18/202415:25
4.25
4.03
238.20
1.01
48.26
15.80
Onsite
SMW-12
Black Creek Aquifer
Willis Creek
1/11/2024
CAP I Q24-SMW-12-011624
1/16/202415:06
3.80
0.55
198.70
2.79
133.25
11.91
Notes:
1 - Water Bearing Unit - refers to the primary aquifer unit where the well screen is estimated to be located.
-- - not measured/not sampled
°C - degrees Celsius
mg/L - milligrams per liter
µS/cm - microsiemens per centimeter
mv- millivolts
NTU - Nephelometric Turbidity Units
ORP - oxidation reduction potential
S.U. - Standard Units
"-Z" in Sample ID denotes field filtration
TR1156 Page 1 of 1 June 2024

TABLE A5
Geosyntec Consultants of NC, P.C.
SEEP AND SURFACE WATER ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Location ID
CFR-BLADEN
CFR-KINGS
CFR-MILE-76
CFR-TARHEEL
Field Sample ID
CAPIQ24-CFR-BLADEN-012424
CAP IQ24-CFR-KINGS-012524
CAP IQ24-CFR-RM-76-012424
CAP I Q24-CFR-TARHEEL-0 12424
Sample Date
1/24/2024
1/25/2024
1/24/2024
1/24/2024
QA/QC
Sample Deliver Group (SDG)
320-109128-1
320-109128-1
320-109128-1
320-109128-1
Lab Sample ID
320-109128-5
320-109128-7
320-109128-4
320-109128-6
Table 3+ (ng/L)
HFPO-DA
<4.0
<4.0
<4.0
<4.0
PFMOAA
<2.0
3.1
<2.0
<2.0
PFO2HxA
<2.0
<2.0
<2.0
<2.0
PFO3OA
<2.0
<2.0
<2.0
<2.0
PFO4DA
<2.0
<2.0
<2.0
<2.0
PFO5DA
<2.0
<2.0
<2.0
<2.0
PMPA
2.3
2.1
<2.0
2.2
PEPA
<2.0
<2.0
<2.0
<2.0
PS Acid
<2.0
<2.0
<2.0
<2.0
Hydro -PS Acid
<2.0
<2.0
<2.0
<2.0
R-PSDA
<2.0
<2.0
<2.0
<2.0
Hydrolyzed PSDA
<2.0
<2.0
<2.0
<2.0
R-PSDCA
<3.0
<3.0
<3.0
<3.0
NVHOS
<3.0
<3.0
<3.0
<3.0
EVE Acid
<2.0
<2.0
<2.0
<2.0
Hydro -EVE Acid
<2.0
<2.0
<2.0
<2.0
R-EVE
<2.0
<2.0
<2.0
<2.0
Perfluoro(2-ethoxyethane)sulfonic Acid
<2.0
<2.0
<2.0
<2.0
PFECA B
<2.0
<2.0
<2.0
<2.0
PFECA-G
<2.0
<2.0
<2.0
<2.0
PFPrA
12
12
19
12
Perfluoroheptanoic Acid
3.4
2.6
3.1
3.1
Total Attachment Ci'2
2.3
5.2
ND
2.2
Total Table 3+ (17 compounds)2'3
2.3
5.2
ND
2.2
Total Table 3+ (18 compounds) 2,41
14
1 17
1 19
1 14
Total Table 3+ (21 compounds)1
14
1 17
1 19
1 14
TR1156 Page 1 of 5 June 2024

TABLE A5
Geosyntec Consultants of NC, P.C.
SEEP AND SURFACE WATER ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Location ID
CFR-TARHEEL
GBC-5
Lock -Dam Seep
Lock -Dam Seep
Field Sample ID
CAP 1 Q24-CFR-TARHEEL-24-
012524
CAPIQ24-GBC-5-012424
CAP IQ24-LOCK-DAM-SEEP-
012424
CAP IQ24-LOCK-DAM-SEEP-
012424-D
Sample Date
1/25/2024
1/24/2024
1/24/2024
1/24/2024
QA/QC
Field Duplicate
Sample Deliver Group (SDG)
320-109127-1
320-109128-1
320-109128-1
320-109128-1
Lab Sample ID
320-109127-7
320-109128-1
320-109128-2
320-109128-3
Table 3+ (ng/L)
HFPO-DA
<4.0
360
6,500
7,300 J
PFMOAA
2.2
72
55,000
48,000 J
PF02HxA
<2.0
340
22,000
23,000 J
PF030A
<2.0
39
11,000 J
13,000 J
PF04DA
<2.0
18
1,500 J
2,800 J
PF05DA
<2.0
2.4
150
200 J
PMPA
2.1
470
5,800
5,600 J
PEPA
<2.0
160
2,300
2,000 J
PS Acid
<2.0
<2.0
<50
<50 UJ
Hydro -PS Acid
<2.0
27
160
160 J
R-PSDA
<2.0
70 J
690 J
530 J
Hydrolyzed PSDA
<2.0
<2.0
430 J
480 J
R-PSDCA
<3.0
<3.0
<180
<180 UJ
NVHOS
<3.0
3.7
880
940 J
EVE Acid
<2.0
<2.0
<50
<50 UJ
Hydro -EVE Acid
<2.0
<2.0
140
170 J
R-EVE
<2.0
21 J
180 J
210 J
Perfluoro(2-ethoxyethane)sulfonic Acid
<2.0
<2.0
<36
<36 UJ
PFECA B
<2.0
<2.0
<78
<78 UJ
PFECA-G
<2.0
<2.0
<36
<36 UJ
PFPrA
12
550
19,000
18,000 J
Perfluoroheptanoic Acid
3.3
2.2
68
75 J
Total Attachment C1'2
4.3
1,500
100,000
100,000
Total Table 3+ (17 compounds)2'3
4.3
1,500
110,000
100,000
Total Table 3+ (18 compounds) 2,41
16
1 2,000
1 120,000
120,000
Total Table 3+ (21 compounds)1
16
1 2,100
1130,000
120,000
TR1156 Page 2 of 5 June 2024

TABLE A5
Geosyntec Consultants of NC, P.C.
SEEP AND SURFACE WATER ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Location ID
OLDOF-1
OUTFALL 002
River Water Intake 2
SEEP-A-EFF
Field Sample ID
CAP1Q24-OLDOF-1B-24-012524
CAP IQ24-OUTFALL-002-24-
012524
RIVER-WATER-INTAKE2-24-
012524
CAP1Q24-SEEP-A-EFF-24-012524
Sample Date
1/25/2024
1/25/2024
1/25/2024
1/25/2024
QA/QC
Sample Deliver Group (SDG)
320-109127-1
320-109127-1
320-109127-1
320-109127-1
Lab Sample ID
320-109127-6
320-109127-5
320-109127-2
320-109127-3
Table 3+ (ng/L)
HFPO-DA
260
23
6.4
<4.0
PFMOAA
990
16
12
20
PF02HxA
450
11
8.5
2.6
PF030A
110 J
3.0
<2.0
<2.0
PF04DA
41 J
<2.0
<2.0
<2.0
PF05DA
31
<2.0
<2.0
<2.0
PMPA
150
8.9
7.5
6.2
PEPA
50
<2.0
<2.0
<2.0
PS Acid
<2.0
3.9
<2.0
<2.0
Hydro -PS Acid
15
2.5
<2.0
<2.0
R-PSDA
19 J
18 J
3.0 J
<2.0
Hydrolyzed PSDA
36 J
27 J
2.9 J
<2.0
R-PSDCA
<3.0
<3.0
<3.0
<3.0
NVHOS
19
7.7
<3.0
<3.0
EVE Acid
<2.0
<2.0
<2.0
<2.0
Hydro -EVE Acid
7.5
<2.0
<2.0
<2.0
R-EVE
13 J
3.6 J
<2.0
<2.0
Perfluoro(2-ethoxyethane)sulfonic Acid
<2.0
<2.0
<2.0
<2.0
PFECA B
<2.0
<2.0
<2.0
<2.0
PFECA-G
<2.0
<2.0
<2.0
<2.0
PFPrA
590
92
82
38
Perfluoroheptanoic Acid
<2.0
3.1
2.9
<2.0
Total Attachment C1'2
2,100
68
34
29
Total Table 3+ (17 compounds)2'3
2,100
76
34
29
Total Table 3+ (18 compounds) 2,4
2,700
170
120
67
Total Table 3+ (21 compounds)21
2,800
1 220
120
67
TR1156 Page 3 of 5 June 2024

TABLE A5
Geosyntec Consultants of NC, P.C.
SEEP AND SURFACE WATER ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Location ID
SEEP-B-EFF
SEEP-C-EFF
SEEP-D-EFF
WC-6
Field Sample ID
CAP IQ24-SEEP-B-EFF-24-012624
CAP1Q24-SEEP-C-EFF-24-012524
CAP1Q24-SEEP-D-EFF-24-012624
CAP1Q24-WC-6-24-012524
Sample Date
1/26/2024
1/25/2024
1/26/2024
1/25/2024
QA/QC
Sample Deliver Group (SDG)
320-109219-1
320-109127-1
320-109219-1
320-109127-1
Lab Sample ID
320-109219-1
320-109127-4
320-109219-2
320-109127-1
Table 3+ (ng/L)
HFPO-DA
6.0
6.6
<4.0
170
PFMOAA
66
37
23
600
PFO2HxA
8.3
7.5
<2.0
250
PFO3OA
<2.0
<2.0
<2.0
33
PFO4DA
<2.0
<2.0
<2.0
6.1
PFO5DA
<2.0
<2.0
<2.0
<2.0
PMPA
18
13
2.2
220
PEPA
4.5
<2.0
<2.0
49
PS Acid
<2.0 UJ
<2.0
<2.0 UJ
<2.0
Hydro -PS Acid
<2.0
<2.0
<2.0
7.7
R-PSDA
<2.0
<2.0
<2.0
30
Hydrolyzed PSDA
2.2 J
<2.0
<2.0
100 J
R-PSDCA
<3.0
<3.0
<3.0
<3.0
NVHOS
<3.0
<3.0
<3.0
12
EVE Acid
<2.0
<2.0
<2.0
<2.0
Hydro -EVE Acid
<2.0
<2.0
<2.0
3.2
R-EVE
<2.0
<2.0
<2.0
15 J
Perfluoro(2-ethoxyethane)sulfonic Acid
<2.0
<2.0
<2.0
<2.0
PFECA B
<2.0
<2.0
<2.0
<2.0
PFECA-G
<2.0
<2.0
<2.0
<2.0
PFPrA
55
130
25
400
Perfluoroheptanoic Acid
<2.0
<2.0
<2.0
<2.0
Total Attachment C1'2
100
64
25
1,300
Total Table 3+ (17 compounds) 2'3
100
64
25
1,400
Total Table 3+ (18 compounds) 2,4
160
190
1 50
1 1,800
Total Table 3+ (21 compounds)
160
190
1 50
1 1,900
TR1156 Page 4 of 5 June 2024

TABLE A5
Geosyntec Consultants of NC, P.C.
SEEP AND SURFACE WATER ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Location ID
EB
EB
Field Sample ID
CAP1Q24-EQBLK-IS-012524
CAPIQ24-EQBLK-PP-012524
Sample Date
1/25/2024
1/25/2024
QA/QC
Equipment Blank
Equipment Blank
Sample Deliver Group (SDG)
320-109127-1
320-109127-1
Lab Sample ID
320-109127-9
320-109127-8
Table 3+ (ng/L)
HFPO-DA
<4.0
<4.0
PFMOAA
<2.0
<2.0
PFO2HxA
<2.0
<2.0
PFO3OA
<2.0
<2.0
PFO4DA
<2.0
<2.0
PFO5DA
<2.0
<2.0
PMPA
<2.0
<2.0
PEPA
<2.0
<2.0
PS Acid
<2.0
<2.0
Hydro -PS Acid
<2.0
<2.0
R-PSDA
<2.0
<2.0
Hydrolyzed PSDA
<2.0
<2.0
R-PSDCA
<3.0
<3.0
NVHOS
<3.0
<3.0
EVE Acid
<2.0
<2.0
Hydro -EVE Acid
<2.0
<2.0
R-EVE
<2.0
<2.0
Perfluoro(2-ethoxyethane)sulfonic Acid
<2.0
<2.0
PFECA B
<2.0
<2.0
PFECA-G
<2.0
<2.0
PFPrA
<5.0
<5.0
Perfluoroheptanoic Acid
<2.0
<2.0
Total Attachment C1,2
ND
ND
Total Table 3+ (17 compounds)2,3
ND
ND
Total Table 3+ (18 compounds) 2,4
ND
ND
Total Table 3+ (21 compounds)
ND
ND
Notes:
Bold - Analyte detected above associated reporting limit
J - Analyte detected. Reported value may not be accurate or precise.
ND - no analytes were detected above the associated reporting limits.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
SDG - Sample Delivery Group
< - Analyte not detected above associated reporting limit.
UJ - Analyte not detected. Reporting limit may not be accurate or precise.
1 - Total Attachment C does not include Perfluoroheptanoic acid (PFHpA).
2 - Total Table 3+ and Total Attachment C were calculated including J
qualified data but not non -detect data. The sum is rounded to two significant
figures.
3 - Total Table 3+ (17 compounds) does not include PFHpA, R-PSDA,
Hydrolyzed PSDA, R-EVE, and PFPrA.
4 - Total Table 3+ (18 compounds) does not include PFHpA, R-PSDA,
Hydrolyzed PSDA, and R-EVE.
TR1156 Page 5 of 5 June 2024

TABLE A6
Geosyntec Consultants of NC, P.C.
GROUNDWATER ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Water Bearing Unit
Black Creek Aquifer
Floodplain Deposits
Black Creek Aquifer
Floodplain Deposits
Location ID
BLADEN-1DR
LTW-01
LTW-02
LTW-03
Field Sample ID
CAPIQ24-BLADEN-IDR-011524
CAP1Q24-LTW-01-011724
CAP 1Q24-LTW-02-011724
CAP 1Q24-LTW-03-013124
Sample Date
1/15/2024
1/17/2024
1/17/2024
1/31/2024
QA/QC
Sample Delivery Group (SDG)
320-108762-2
320-109020-1
320-109020-1
320-109381-1
Lab Sample ID
320-108762-10
320-109020-1
320-109020-2
320-109381-7
Table 3+ (ng/L)
HFPO-DA
160 J
15,000
12,000
7,800
PFMOAA
28 J
12,000
32,000
86,000
PF02HxA
110 J
17,000
28,000
28,000
PF030A
14 J
3,300
5,200
3,800
PF04DA
<2.0 UJ
950
200
150
PF05DA
<2.0 UJ
140
<130
<130
PMPA
320 J
15,000
14,000
11,000
PEPA
110 J
6,800
5,100
29200
PS Acid
<2.0 UJ
<50
<50
<50 UJ
Hydro -PS Acid
<2.0 UJ
200
<55
<55
R-PSDA
12 J
830 J
780 J
770 J
Hydrolyzed PSDA
<2.0 UJ
83 J
1,800 J
5,300 J
R-PSDCA
<3.0 UJ
<180
<180
<180
NVHOS
<3.0 UJ
270
450
19100
EVE Acid
<2.0 UJ
<50
<50
<50 UJ
Hydro -EVE Acid
<2.0 UJ
51
<30
42
R-EVE
4.7 J
310 J
440 J
320 J
Perfluoro(2-ethoxyethane)sulfonic Acid
<2.0 UJ
<36
<36
<36
PFECA B
<2.0 UJ
<78
<78
<78
PFECA-G
<2.0 UJ
<36
<36
<36
PFPrA
190 J
15,000
23,000
47,000
Perfluoroheptanoic Acid
<2.0 UJ
40
<31
<31
Total Attachment C2'3
740
70,000
97,000
140,000
Total Table 3+ (17 compounds) 3 ' 4
740
71,000
97,000
140,000
Total Table 3+ (18 compounds)3,5
930
86,000
120,000
190,000
Total Table 3+ (21 compounds)31
950
1 87,000
1 120,000
1 190,000
TR1156 Pagel of 8 June 2024

TABLE A6
Geosyntec Consultants of NC, P.C.
GROUNDWATER ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Water Bearing Unit
Floodplain Deposits
Black Creek Aquifer
Black Creek Aquifer
Black Creek Aquifer
Location ID
LTW-04
LTW-05
OW-28
OW-33
Field Sample ID
CAP 1Q24-LTW-04-011624
CAP 1Q24-LTW-05-011524
CAP1Q24-OW-28-011824
CAP1Q24-OW-33-013024
Sample Date
1/16/2024
1/15/2024
1/18/2024
1/30/2024
QA/QC
Sample Delivery Group (SDG)
320-108762-1
320-108762-1
320-109020-1
320-109381-1
Lab Sample ID
320-108762-5
320-108762-9
320-109020-9
320-109381-5
Table 3+ (ng/L)
HFPO-DA
17,000
31,000
3,800
49400
PFMOAA
559000
200,000
1,600
7,700
PF02HxA
26,000
68,000
3,300
3,800
PF030A
5,100
21,000
620
560
PF04DA
560
2,300
85
<50
PF05DA
<130
<130
<130
<130
PMPA
16,000
9,200
5,700
4,500
PEPA
5,500
1,800
2,800
1,300
PS Acid
<50
<50
<50
<50 UJ
Hydro -PS Acid
150
330
84
<55
R-PSDA
19400 J
1,300 J
280 J
210 J
Hydrolyzed PSDA
2,800 J
2,600 J
<34
38 J
R-PSDCA
<180
<180
<180
<180
NVHOS
1,200
2,100
<160
<160
EVE Acid
<50
<50
<50
<50 UJ
Hydro -EVE Acid
370
1,300
<30
<30
R-EVE
1,100 J
1,500 J
120 J
140 J
Perfluoro(2-ethoxyethane)sulfonic Acid
<36
<36
<36
<36
PFECA B
<78
<78
<78
<78
PFECA-G
<36
<36
<36
<36
PFPrA
43,000 J
120,000 B
6,500
7,300
Perfluoroheptanoic Acid
68
310
<31
<31
Total Attachment C2'3
130,000
330,000
18,000
22,000
Total Table 3+ (17 compounds) 3 ' 4
130,000
340,000
18,000
22,000
Total Table 3+ (18 compounds)3'5
1709000
4609000
249000
309000
Total Table 3+ (21 compounds)3
180,000
460,000
25,000
30,000
TR1156 Page 2 of 8 June 2024

TABLE A6
Geosyntec Consultants of NC, P.C.
GROUNDWATER ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Water Bearing Unit
Floodplain Deposits
Black Creek Aquifer
Black Creek Aquifer
Black Creek Aquifer
Location ID
PIW-1S
PIW-11)
PIW-31)
PIW-71)
Field Sample ID
CAP1Q24-PIW-1S-011624
CAP1Q24-PIW-1D-012224
CAP 1Q24-PIW-3D-011824
CAP 1Q24-PIW-7D-011524
Sample Date
1/16/2024
1/22/2024
1/18/2024
1/15/2024
QA/QC
Sample Delivery Group (SDG)
320-108762-1
320-109019-1
320-109020-1
320-108762-1
Lab Sample ID
320-108762-7
320-109019-1
320-109020-7
320-108762-1
Table 3+ (ng/L)
HFPO-DA
11400
8,600
15,000
14,000
PFMOAA
390 J
10,000
25,000
150,000
PF02HxA
19200
9,800
27,000
38,000
PF030A
240
1,900
5,600
6,500
PF04DA
110
250
1,800
870
PF05DA
<130
<130
380
<130
PMPA
1,100
9,800
16,000
5,600
PEPA
330
3,700
6,100
19100
PS Acid
<50
<50
<50
<50
Hydro -PS Acid
230
95
340
110
R-PSDA
110 J
380 J
780 J
570 J
Hydrolyzed PSDA
<34
<34
470 J
19100 J
R-PSDCA
<180
<180
<180
<180
NVHOS
<160
<160
360
1,300
EVE Acid
<50
<50
<50
<50
Hydro -EVE Acid
30
32
100
320
R-EVE
<39
180 J
390 J
540 J
Perfluoro(2-ethoxyethane)sulfonic Acid
<36
<36
<36
<36
PFECA B
<78
<78
<78
<78
PFECA-G
<36
<36
<36
<36
PFPrA
1,300 J
11,000
22,000
71,000 J
Perfluoroheptanoic Acid
<31
<31
44
100
Total Attachment C2'3
5,000
44,000
97,000
220,000
Total Table 3+ (17 compounds) 3 ' 4
5,000
44,000
98,000
220,000
Total Table 3+ (18 compounds)3's1
6,300
55,000
120,000
290,000
Total Table 3+ (21 compounds)31
6,400
1 56,000
1 120,000
1 290,000
TR1156 Page 3 of 8 June 2024

TABLE A6
Geosyntec Consultants of NC, P.C.
GROUNDWATER ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Water Bearing Unit
Black Creek Aquifer
Floodplain Deposits
Surficial Aquifer
Surficial Aquifer
Location ID
PIW-7D
PIW-7S
PW-04
PW-04
Field Sample ID
CAP1Q24-PIW-7D-011524-D
CAP1Q24-PIW-7S-011524
CAP1Q24-PW-04-011724
CAP1Q24-PW-04-011724-Z
Sample Date
1/15/2024
1/15/2024
1/17/2024
1/17/2024
QA/QC
Field Duplicate
Sample Delivery Group (SDG)
320-108762-1
320-108762-1
320-109020-1
320-109020-1
Lab Sample ID
320-108762-2
320-108762-3
320-109020-5
320-109020-6
Table 3+ (ng/L)
HFPO-DA
14,000
13,000
1,000
19100
PFMOAA
140,000
17,000
370
410
PF02HxA
45,000
13,000
1,000
1,400
PF030A
6,300
3,800
450
570
PF04DA
940
400
110
86
PF05DA
<130
<130
<130
<130
PMPA
5,500
9,500
1,400
1,500
PEPA
19100
3,800
590
650
PS Acid
<50
<50
<50
<50
Hydro -PS Acid
95
230
<55
<55
R-PSDA
560 J
790 J
130 J
130 J
Hydrolyzed PSDA
19100 J
45 J
<34
<34
R-PSDCA
<180
<180
<180
<180
NVHOS
1,200
680
<160
<160
EVE Acid
<50
<50
<50
<50
Hydro -EVE Acid
310
360
<30
<30
R-EVE
600 J
880 J
66 J
65 J
Perfluoro(2-ethoxyethane)sulfonic Acid
<36
<36
<36
<36
PFECA B
<78
<78
<78
<78
PFECA-G
<36
<36
<36
<36
PFPrA
739000 J
179000 J
1,400
1,600
Perfluoroheptanoic Acid
100
56
<31
<31
Total Attachment C2'3
210,000
61,000
4,900
5,700
Total Table 3+ (17 compounds) 3 ' 4
210,000
62,000
4,900
5,700
Total Table 3+ (18 compounds)3,5
290,000
79,000
6,300
7,300
Total Table 3+ (21 compounds)31
290,000
80,000
6,500
7,500
TR1156 Page 4 of 8 June 2024

TABLE A6
Geosyntec Consultants of NC, P.C.
GROUNDWATER ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Water Bearing Unit
Surficial Aquifer
Surficial Aquifer
Black Creek Aquifer
Black Creek Aquifer
Location ID
PW-06
PW-07
PW-09
PW-09
Field Sample ID
CAPIQ24-PW-06-011524
CAPIQ24-PW-07-020724
CAPIQ24-PW-09-012324
CAP1Q24-PW-09-012324-D
Sample Date
1/15/2024
2/7/2024
1/23/2024
1/23/2024
QA/QC
Field Duplicate
Sample Delivery Group (SDG)
320-108762-1
320-109816-1
320-109223-1
320-109223-1
Lab Sample ID
320-108762-8
320-109816-1
320-109223-1
320-109223-2
Table 3+ (ng/L)
HFPO-DA
950
<190 UJ
<4.0
<4.0
PFMOAA
130 J
84 J
<2.0
<2.0
PF02HxA
730
230 J
<2.0
<2.0
PF030A
<110
<110 UJ
<2.0
<2.0
PF04DA
<50
<50 UJ
<2.0
<2.0
PF05DA
<130
<130 UJ
<2.0
<2.0
PMPA
900
230 J
<2.0
<2.0
PEPA
360
<60 UJ
<2.0
<2.0
PS Acid
<50
<50 UJ
<2.0
<2.0
Hydro -PS Acid
<55
<55 UJ
<2.0
<2.0
R-PSDA
42 J
46 J
<2.0
<2.0
Hydrolyzed PSDA
<34
<34 UJ
<2.0
<2.0
R-PSDCA
<180
<180 UJ
<3.0
<3.0
NVHOS
<160
<160 UJ
<3.0
<3.0
EVE Acid
<50
<50 UJ
<2.0
<2.0
Hydro -EVE Acid
<30
<30 UJ
<2.0
<2.0
R-EVE
<39
<39 UJ
<2.0
<2.0
Perfluoro(2-ethoxyethane)sulfonic Acid
<36
<36 UJ
<2.0
<2.0
PFECA B
<78
<78 UJ
<2.0
<2.0
PFECA-G
<36
<36 UJ
<2.0
<2.0
PFPrA
950 J
450 J
<5.0
<5.0
Perfluoroheptanoic Acid
<31
<31 UJ
<2.0
<2.0
Total Attachment C2,3
3,100
840
ND
ND
Total Table 3+ (17 compounds) 3,4
3,100
840
ND
ND
Total Table 3+ (18 compounds)3,5
4,000
1,300
ND
ND
Total Table 3+ (21 compounds)3
4,100
1,400
ND
ND
TR1156 Page 5 of 8 June 2024

TABLE A6
Geosyntec Consultants of NC, P.C.
GROUNDWATER ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Water Bearing Unit
Black Creek Aquifer
Black Creek Aquifer
Surficial Aquifer
Black Creek Aquifer
Location ID
PZ-22
SMW-10
SMW-11
SMW-12
Field Sample ID
CAPIQ24-PZ-22-011624
CAPIQ24-SMW-10-011724
CAPIQ24-SMW-11-011824
CAPIQ24-SMW-12-011624
Sample Date
1/16/2024
1/17/2024
1/18/2024
1/16/2024
QA/QC
Sample Delivery Group (SDG)
320-108762-1
320-109020-1
320-109020-1
320-108762-1
Lab Sample ID
320-108762-6
320-109020-4
320-109020-8
320-108762-4
Table 3+ (ng/L)
HFPO-DA
11,000
4.9
5,200
1,900
PFMOAA
150,000
160
9,500
9,600
PF02HxA
42,000
17
4,900
3,200
PF030A
5,100
<2.0
1,200
490
PF04DA
220
<2.0
340
<50
PF05DA
<130
<2.0
<130
<130
PMPA
6,300
23
3,600
1,900
PEPA
1,400
<2.0
1,200
300
PS Acid
<50
<2.0
<50
<50
Hydro -PS Acid
<55
<2.0
<55
<55
R-PSDA
440 J
<2.0
120 J
65 J
Hydrolyzed PSDA
1,100 J
<2.0
88 J
<34
R-PSDCA
<180
<3.0
<180
<180
NVHOS
1,300
<3.0
160
<160
EVE Acid
<50
<2.0
<50
<50
Hydro -EVE Acid
73
<2.0
<30
<30
R-EVE
300 J
<2.0
88 J
45 J
Perfluoro(2-ethoxyethane)sulfonic Acid
<36
<2.0
<36
<36
PFECA B
<78
<2.0
<78
<78
PFECA-G
<36
<2.0
<36
<36
PFPrA
72,000 J
210
5,500
6,400 J
Perfluoroheptanoic Acid
36
<2.0
32
<31
Total Attachment C2,3
220,000
200
26,000
17,000
Total Table 3+ (17 compounds) 3,4
220,000
200
26,000
17,000
Total Table 3+ (18 compounds)3,5
290,000
410
32,000
24,000
Total Table 3+ (21 compounds)31
290,000
410
32,000
1 24,000
TR1156 Page 6 of 8 June 2024

TABLE A6
Geosyntec Consultants of NC, P.C.
GROUNDWATER ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Water Bearing Unit'
--
--
--
Location ID
EB
EB
EB
Field Sample ID
CAP 1Q24-EQBLK-PP-011724
CAP1Q24-EQBLK-BAILER-
012224
CAP1Q24-EQBLK-BAILER-
012224-Z
Sample Date
1/17/2024
1/22/2024
1/22/2024
QA/QC
Equipment Blank
Equipment Blank
Equipment Blank
Sample Delivery Group (SDG)
320-108762-1
320-109019-1
320-109019-1
Lab Sample ID
320-108762-11
320-109019-6
320-109019-7
Table 3+ (ng/L)
HFPO-DA
<4.0
<4.0
<4.0
PFMOAA
<2.0
<2.0
<2.0
PF02HxA
<2.0
<2.0
<2.0
PF030A
<2.0
<2.0
<2.0
PF04DA
<2.0
<2.0
<2.0
PF05DA
<2.0
<2.0
<2.0
PMPA
<2.0
<2.0
<2.0
PEPA
<2.0
<2.0
<2.0
PS Acid
<2.0
<2.0
<2.0
Hydro -PS Acid
<2.0
<2.0
<2.0
R-PSDA
<2.0
<2.0
<2.0
Hydrolyzed PSDA
<2.0
<2.0
<2.0
R-PSDCA
<3.0
<3.0
<3.0
NVHOS
<3.0
<3.0
<3.0
EVE Acid
<2.0
<2.0
<2.0
Hydro -EVE Acid
<2.0
<2.0
<2.0
R-EVE
<2.0
<2.0
<2.0
Perfluoro(2-ethoxyethane)sulfonic Acid
<2.0
<2.0
<2.0
PFECA B
<2.0
<2.0
<2.0
PFECA-G
<2.0
<2.0
<2.0
PFPrA
<5.0
<5.0
<5.0
Perfluoroheptanoic Acid
<2.0
<2.0
<2.0
Total Attachment C 2 ' 3
ND
ND
ND
Total Table 3+ (17 compounds)3'4
ND
ND
ND
Total Table 3+ (18 compounds)3's
ND
ND
ND
Total Table 3+ (21 compounds) 3
ND
ND
ND
TR1156 Page 7 of 8 June 2024

TABLE A6
GROUNDWATER ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Water Bearing Unit'
--
Location ID
EB
Field Sample ID
CAP1Q24-EQBLK-DV-012224
Sample Date
1/22/2024
QA/QC
Equipment Blank
Sample Delivery Group (SDG)
320-109019-1
Lab Sample ID
320-109019-5
Table 3+ (ng/L)
HFPO-DA
<4.0
PFMOAA
<2.0
PF02HxA
<2.0
PF030A
<2.0
PF04DA
<2.0
PF05DA
<2.0
PMPA
<2.0
PEPA
<2.0
PS Acid
<2.0
Hydro -PS Acid
<2.0
R-PSDA
<2.0
Hydrolyzed PSDA
<2.0
R-PSDCA
<3.0
NVHOS
<3.0
EVE Acid
<2.0
Hydro -EVE Acid
<2.0
R-EVE
<2.0
Perfluoro(2-ethoxyethane)sulfonic Acid
<2.0
PFECA B
<2.0
PFECA-G
<2.0
PFPrA
<5.0
Perfluoroheptanoic Acid
<2.0
Total Attachment C2'3
ND
Total Table 3+ (17 com ounds)3'4
ND
Total Table 3+ (18 com ounds)3'5
ND
Total Table 3+ (21 com ounds)3
ND
Geosyntec Consultants of NC, P.C.
Notes:
B - analyte detected in an associated blank
J - Analyte detected. Reported value may not be accurate or precise
ND - no Table 3+ analytes were detected above the associated reporting limits
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
SDG - Sample Delivery Group
UJ — Analyte not detected. Reporting limit may not be accurate or precise.
"-Z" in Sample ID denotes field filtration
< - Analyte not detected above associated reporting limit.
-- - not applicable
1 - Refers to the primary aquifer unit that the well screen is estimated to be
screened within
2 - Total Attachment C does not include Perfluoroheptanoic acid (PFHpA).
3 - Total Table 3+ and Total Attachment C were calculated including J qualified
data but not non -detect data. The sum is rounded to two significant figures.
4 - Total Table 3+ (17 compounds) does not include PFHpA, R-PSDA,
Hydrolyzed PSDA, R-EVE, and PFPrA.
5 - Total Table 3+ (18 compounds) does not include PFHpA, R-PSDA,
Hydrolyzed PSDA, and R-EVE.
TR1156 Page 8 of 8 June 2024

TABLE A7
SUMMARY OF TOTAL PFAS MASS DISCHARGE BY PATHWAY AFTER REMEDIES
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Pathway
Pathway Name
Total Flow Volume
on Sample Date
(MG)'
Total Attachment C
Total Table 3+ (17
compounds)
Total Table 3+ (18 compounds)
Total Table 3+ (21 compounds)
Concentration
(ng/L)
Mass Discharge
(mg/s)
Concentration
(ng/L)
Mass Discharge
(mg/s)
Concentration
(ng/L)
Mass Discharge
(mg/s)
Concentration
(ng/L)
Mass Discharge
(mg/s)
I
Upstream River Water and Groundwater
7,009
0.0
0.0
0.0
0.0
19
5.83
19
5.83
2
Willis Creek
6.00
1,300
0.34
1,400
0.37
1,800
0.47
1,900
0.50
3
Aerial Deposition on Water Features
--
--
0.01
--
0.01
--
0.01
--
0.01
4
Outfall 002'
16
34
0.02
42
0.03
50
0.03
100
0.07
4A
Stormwater Treatment System
--
--
--
--
--
5
Onsite Groundwater
--
--
0.04
--
0.04
--
0.05
--
0.05
6A
Seep A
0.05
29
6.4E-05
29
6.4E-05
67
1.5E-04
67
0.00
6B
Seep B
0.02
100
8.7E-05
100
8.7E-05
160
1.4E-04
160
1.4E-04
6C
Seep C
0.03
64
9.1E-05
64
9.1E-05
190
2.7E-04
190
2.7E-04
6D
Seep D
0.01
25
7.3E-06
25
7.3E-06
50
1.5E-05
50
1.5E-05
6E
Lock and Dam Seep
0.02
100,000
0.07
110,000
0.08
120,000
0.09
130,000
0.10
6F
Lock and Dam Seep North
--
--
--
--
7
Outfall 003 Stream'0
9.4E-02
2,100
0.01
2,100
0.01
2,700
0.01
2,800
0.01
8
Offsite Adjacent and Downstream Groundwater
--
--
0.0
--
0.0
--
2.20
--
2.20
9
Georgia Branch Creek
11.97
1,500
0.79
1,500
0.79
2,000
1.05
2,100
1.10
Calculated Total Table 3+ Loading (mg/s) at Tar Heel
1.28
1.33
9.75
9.87
Notes:
1 - Total flow volume is determined based on measurements taken over 24-hour sample collection
period for all locations except Willis Creek, Lock and Dam Seep, Outfall 003, and Georgia Branch
Creek. At these locations, the total flow volume was estimated based on the instantaneous flow
measurement.
2 - Mass discharge calculations for Total Attachment C does not include Perfluorohepthanoic acid
(PFHpA).
3 - Total Table 3+ (17 compounds) does not include PFHpA, R-PSDA, Hydrolyzed PSDA, R-EVE
and PFPrA.
4 - Total Table 3+ (18 compounds) does not include PFHpA, R-PSDA, Hydrolyzed PSDA, and R-
EVE.
5 - The volumetric flow rate for upstream river water and groundwater was estimated by
subtracting inflows from Willis Creek, upwelling groundwater, seeps to the river, and Outfall 002
and by adding the river water intake from Chemours to the flow rate measurement from the W.O.
Huske Dam.
6 - Total PFAS concentrations at the Intake River Water at Facility location are subtracted from
Outfall 002 concentrations to compute the mass discharge at Outfall 002.
7 - The stormwater treatment system captures PFAS originating from Stormwater in the
Monomers/IXM area that would otherwise flow to Outfall 002 during storm events. During the
January sampling event there was no stormwater flow to the stormwater treatment system, so there
was no mass loading calculated for this location.
8 - Due to transient conditions as a result of the groundwater remedy installation and commissioning, gradient measurements are impacted from these
activities and should be considered estimates.
9 - There was insufficient flow observed at Lock and Dam Seep North at the time of sampling and therefore samples were not collected and mass
discharge could not be calculated.
10 - For January 2024, the concentrations from the stream sample collected downgradient from the Outfall 003 treatment system and effluent samples
collected at the effluent basins of the Seep A, B, C and D flow -through cells were used to calculate the After Remedy mass discharge for these
pathways.
TR1156 Page 1 of 1 June 2024

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me
HFPO
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Concentration
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ot detected.••reporting limit.
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530
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PW-06
3,100
SMW-10
200 \ ) SMW-12
Creek \_�_ 17,000
PW-09 SMW-11
\ ND / ND 26,000
PIW-1D
44,000
PIW-1 S
5,000
PIW-3D
98,000
Seep A
LTW-03
i R LTW-02
140,000
� Alm 97,00o f � Seep B
_ wt
+, f PZ-22
LTW-04 CD 220,000
LTW-05
PIW-7D 340,000
220,000 / 210,000
� PIW-7S
_ 62,000
OW-28
18,000
PW-04
4,900
PW-ll
62,000
PW-07
540
�LllrSeep C
00,
Seep D
OW-33
22,000
t
Lock and Dam
Seep North
N Legend
Surficial Aquifer Monitoring
— — Observed Seep
Well
Black Creek Aquifer
Nearby Tributary
Monitoring Well
—Site Boundary
Floodplain Deposits
Monitoring Well
North Forcemain
❑
Flow -Through Cell
South Forcemain
ElOutfall
003 Treatment
Barrier Wall
System
Groundwater Treatment
■
Stormwater Treatment
F/71 Pad and Break Tank
Syste m
PIW-1 D� Location Name
44,000 Total Table 3+
Concentration
(ng/L)
Notes:
ND - no Table 3+ analytes (17 compounds) were detected above the
associated reporting limits
1. All results are in nanograms per liter.
2. Total Table 3+ (17 compounds) does not include PFHpA, R-PSDA,
Hydrolyzed PSDA, R-EVE, and PFPrA.
3. Non -detect values were not included in sum of total Table 3+ results.
4. Total Table 3+ results include J-qualified data.
5. The outline of Cape Fear River is approximate and is based on
open data from ArcGIS Online and North Carolina Department of
Environmental Quality Online GIS.
6. Basemap sources: Esri, Maxar, Earthstar Geographics, and the GIS
User Community.
N
V � Y s
Lock and Dam Seep 2
1 0.5 0 1 Mlles
;! 1,500 750 0 1,500 Feet
Total Table 3+ Concentrations
(17 Compounds) in Groundwater - Q1 2024
Chemours Fayetteville Works, North Carolina
Ge o syn to c'i Geosyntec Consultants of NC, P.C. Figure
consultants NC license No.: C-3500 and C-295
A4
Raleigh I June 2024

Appendix A: Cape Fear River PFAS Mass Loading Model
Geosyntec
consultants
Attachment ATT1
Geosyntec Consultants of NC, P.C.
NC License No.: C-3500 and C-295
Supplemental Tables to the Mass Loading
Model
TR 1 156 -Cape Fear River PEAS Mass Loading Assessment First Quarter 2024 Report 15 .Julie 2024

TABLE ATT1-1 Geosyntec Consultants of NC, P.C.
SEEP A FLOW THROUGH CELL (FTC) DATA
Chemours Fayetteville Works, North Carolina
Date/Time
Flow Rate (gP m)
Bypass Spillway
Flow Rate (gpm)
Bypass Spillway
Volume (gal)
Flow Volume'
(gal)
1/24/2024 8:08
41.4
0
0
622
1/24/2024 8:23
31.5
0
0
473
1/24/2024 8:38
36.4
0
0
546
1/24/2024 8:53
39.4
0
0
591
1/24/2024 9:08
34.4
0
0
516
1/24/2024 9:23
30.6
0
0
459
1/24/2024 9:38
43.9
0
0
658
1/24/2024 9:53
26.0
0
0
391
1/24/202410:08
33.8
0
0
507
1/24/202410:23
39.4
0
0
591
1/24/202410:38
30.0
0
0
450
1/24/2024 10:53
19.6
0
0
293
1/24/202411:08
22.6
0
0
339
1/24/202411:23
22.6
0
0
339
1/24/2024 11:3 8
21.2
0
0
318
1/24/202411:53
22.0
0
0
330
1/24/202412:08
20.4
0
0
305
1/24/202412:23
22.3
0
0
335
1/24/2024 12:38
12.3
0
0
184
1/24/202412:53
29.1
0
0
436
1/24/202413:08
26.6
0
0
400
1/24/202413:23
26.0
0
0
391
1/24/202413:38
22.9
0
0
343
1/24/202413:53
27.2
0
0
409
1/24/202414:08
32.5
0
0
487
1/24/202414:23
34.7
0
0
521
1/24/202414:38
23.7
0
0
356
1/24/2024 14:53
22.6
0
0
339
1/24/202415:08
39.1
0
0
586
1/24/202415:23
22.0
0
0
330
1/24/202415:38
20.6
0
0
310
1/24/202415:53
36.4
0
0
546
1/24/2024 16:08
31.2
0
0
468
1/24/2024 16:23
28.1
0
0
422
1/24/202416:38
45.6
0
0
685
1/24/202416:53
33.1
0
0
497
1/24/202417:08
32.8
0
0
492
1/24/202417:23
38.0
0
0
571
1/24/202417:38
60.6
0
0
909
1/24/202417:53
38.0
0
0
571
1/24/202418:08
52.9
0
0
794
TR1156 Pagel of 3 June 2024

TABLE ATT1-1 Geosyntec Consultants of NC, P.C.
SEEP A FLOW THROUGH CELL (FTC) DATA
Chemours Fayetteville Works, North Carolina
Date/Time
Flow Rate (gP m)
Bypass Spillway
Flow Rate (gpm)
Bypass Spillway
Volume (gal)
Flow Volume'
(gal)
1/24/202418:23
39.1
0
0
586
1/24/202418:38
54.4
0
0
817
1/24/202418:53
48.9
0
0
733
1/24/2024 19:08
47.8
0
0
717
1/24/202419:23
46.4
0
0
695
1/24/202419:38
44.9
0
0
674
1/24/202419:53
41.1
0
0
616
1/24/2024 20:08
31.5
0
0
473
1/24/2024 20:23
41.1
0
0
616
1/24/2024 20:38
29.7
0
0
445
1/24/2024 20:53
35.4
0
0
531
1/24/2024 21:08
31.5
0
0
473
1/24/2024 21:23
51.1
0
0
766
1/24/2024 21:38
34.1
0
0
511
1/24/2024 21:53
47.8
0
0
717
1/24/2024 22:08
38.7
0
0
581
1/24/2024 22:23
31.5
0
0
473
1/24/2024 22:38
41.4
0
0
622
1/24/2024 22:53
40.4
0
0
606
1/24/2024 23:08
40.4
0
0
606
1/24/2024 23:23
31.9
0
0
478
1/24/2024 23:38
38.0
0
0
571
1/24/2024 23:53
37.4
0
0
561
1/25/2024 0:08
40.8
0
0
611
1/25/2024 0:23
35.7
0
0
536
1/25/2024 0:38
38.0
0
0
571
1/25/2024 0:53
38.4
0
0
576
1/25/20241:08
40.1
0
0
601
1/25/20241:23
40.8
0
0
611
1/25/20241:38
43.5
0
0
653
1/25/20241:53
39.7
0
0
596
1/25/2024 2:08
42.1
0
0
632
1/25/2024 2:23
39.4
0
0
591
1/25/2024 2:38
44.2
0
0
663
1/25/2024 2:53
52.2
0
0
783
1/25/2024 3:08
38.0
0
0
571
1/25/2024 3:23
27.2
0
0
409
1/25/2024 3:38
39.7
0
0
596
1/25/2024 3:53
40.4
0
0
606
1/25/2024 4:08
38.7
0
0
581
1/25/2024 4:23
42.1
0
0
632
TR1156 Page 2 of 3 June 2024

TABLE ATTl-1 Geosyntec Consultants of NC, P.C.
SEEP A FLOW THROUGH CELL (FTC) DATA
Chemours Fayetteville Works, North Carolina
Date/Time
Flow Rate (gpm)
Bypass Spillway
Flow Rate (gpm)
Bypass Spillway
Volume (gal)
Flow Volumes
(gal)
1/25/2024 4:38
25.2
0
0
377
1/25/2024 4:53
35.4
0
0
531
1/25/2024 5:08
50.0
0
0
750
1/25/2024 5:23
44.6
0
0
669
1/25/2024 5:38
46.4
0
0
695
1/25/2024 5:53
30.6
0
0
459
1/25/2024 6:08
41.8
0
0
627
1/25/2024 6:23
50.3
0
0
755
1/25/2024 6:38
44.6
0
0
669
1/25/2024 6:53
46.7
0
0
701
1/25/2024 7:08
41.8
0
0
627
Total Flow Volume (gal)
50,654
Notes:
gal - gallons
gpm - gallons per minute
FTC - Flow Through Cell
1 - Flow volumes are calculated as the total volume of flow passing through the Flow through cell
(FTC) for the duration of the interval (15 mins). Where the interval duration is calculated as the time
between the present recording and the previous recording.
TR1156 Page 3 of 3 June 2024

TABLE ATTl-2 Geosyntec Consultants of NC, P.C.
SEEP B FLOW THROUGH CELL (FTC) DATA
Chemours Fayetteville Works, North Carolina
Date/Time
Flow Rate (gpm)
Bypass Spillway
Flow Rate (gpm)
Bypass Spillway
Volume (gal)
Flow Volume'
(gal)
O1/24/24 9:52
5
0
0
79
01/24/24 10:07
11
0
0
163
01/24/24 10:22
14
0
0
211
01/24/2410:37
7
0
0
112
01/24/2410:52
2
0
0
28
01/24/2411:07
4
0
0
59
01/24/2411:22
4
0
0
57
01/24/2411:37
3
0
0
46
01/24/2411:52
4
0
0
62
01/24/2412:07
3
0
0
43
01/24/2412:22
4
0
0
59
01/24/2412:37
0
0
0
0
01/24/2412:52
7
0
0
107
01/24/2413:07
7
0
0
107
01/24/2413:22
7
0
0
98
01/24/2413:37
5
0
0
74
01/24/2413:52
7
0
0
104
O1/24/24 14:07
11
0
0
159
O1/24/24 14:22
12
0
0
183
01/24/2414:37
5
0
0
79
01/24/2414:52
4
0
0
67
O1/24/24 15:07
14
0
0
215
01/24/2415:22
5
0
0
74
01/24/2415:37
4
0
0
62
01/24/24 15:52
14
0
0
207
O1/24/24 16:07
10
0
0
156
01/24/2416:22
8
0
0
127
01/24/2416:37
22
0
0
328
O1/24/24 16:52
12
0
0
179
O1/24/24 17:07
12
0
0
183
O1/24/24 17:22
14
0
0
215
01/24/2417:37
31
0
0
471
O1/24/24 17:52
15
0
0
218
01/24/2418:07
26
0
0
384
O1/24/24 18:22
16
0
0
233
01/24/2418:37
27
0
0
402
01/24/2418:52
23
0
0
345
01/24/2419:07
23
0
0
341
01/24/2419:22
21
0
0
316
01/24/2419:37
21
0
0
316
O1/24/24 19:52
18
0
0
268
O1/24/24 20:07
11
0
0
163
O1/24/24 20:22
16
0
0
244
TR1156 Page 1 of 3 June 2024

TABLE ATTl-2 Geosyntec Consultants of NC, P.C.
SEEP B FLOW THROUGH CELL (FTC) DATA
Chemours Fayetteville Works, North Carolina
Date/Time
Flow Rate m
(gp )
Bypass Spillway
Flow Rate (gpm)
Bypass Spillway
Volume (gal)
Flow Volume'
(gal)
O1/24/24 20:37
10
0
0
149
O1/24/24 20:52
13
0
0
193
O1/24/24 21:07
11
0
0
163
O1/24/24 21:22
24
0
0
358
O1/24/24 21:37
12
0
0
183
O1/24/24 21:52
23
0
0
345
O1/24/24 22:07
16
0
0
237
O1/24/24 22:22
11
0
0
159
O1/24/24 22:37
18
0
0
264
O1/24/24 22:52
17
0
0
256
O1/24/24 23:07
18
0
0
264
O1/24/24 23:22
12
0
0
183
O1/24/24 23:37
15
0
0
229
O1/24/24 23:52
15
0
0
226
O1/25/24 0:07
18
0
0
264
O1/25/24 0:22
14
0
0
204
O1/25/24 0:37
16
0
0
233
O1/25/24 0:52
17
0
0
248
01 /25/24 1:07
17
0
0
248
O1/25/24 1:22
16
0
0
237
O1/25/24 1:37
19
0
0
287
01 /25/24 1:52
16
0
0
241
O1/25/24 2:07
18
0
0
268
O1/25/24 2:22
14
0
0
211
O1/25/24 2:37
18
0
0
271
O1/25/24 2:52
23
0
0
349
O1/25/24 3:07
14
0
0
215
O1/25/24 3:22
7
0
0
101
O1/25/24 3:37
15
0
0
226
O1/25/24 3:52
16
0
0
244
O1/25/24 4:07
16
0
0
233
O1/25/24 4:22
19
0
0
279
O1/25/24 4:37
7
0
0
101
O1/25/24 4:52
13
0
0
200
O1/25/24 5:07
23
0
0
341
O1/25/24 5:22
20
0
0
295
O1/25/24 5:37
21
0
0
312
O1/25/24 5:52
10
0
0
149
O1/25/24 6:07
18
0
0
268
O1/25/24 6:22
24
0
0
354
O1/25/24 6:37
20
0
0
295
O1/25/24 6:52
22
0
0
324
O1/25/24 7:07
18
0
0
271
O1/25/24 7:22
18
0
0
275
TR1156 Page 2 of 3 June 2024

TABLE ATTl-2 Geosyntec Consultants of NC, P.C.
SEEP B FLOW THROUGH CELL (FTC) DATA
Chemours Fayetteville Works, North Carolina
Date/Time
Flow Rate (gpm)
Bypass Spillway
Flow Rate (gpm)
Bypass Spillway
Volume (gal)
Flow Volume'
(gal)
O1/25/24 7:37
21
0
0
308
O1/25/24 7:52
18
0
0
271
O1/25/24 8:07
24
0
0
358
O1/25/24 8:22
14
0
0
211
O1/25/24 8:37
21
0
0
316
O1/25/24 8:52
20
0
0
295
Total Flow Volume (gal)
19,858
Notes:
gal - gallons
gpm - gallons per minute
FTC - Flow Through Cell
1 - Flow volumes are calculated as the total volume of flow passing through the Flow through cell (FTC) for the
duration of the interval (15 mins). Where the interval duration is calculated as the time between the present
recording and the previous recording.
TR1156 Page 3 of 3 June 2024

TABLE ATTl-3 Geosyntec Consultants of NC, P.C.
SEEP C FLOW THROUGH CELL (FTC) DATA
Chemours Fayetteville Works, North Carolina
Date/Time
Flow Rate m
(gp )
Bypass Spillway
Flow Rate (gpm)
Bypass Spillway
Volume (gal)
Flow Volume'
(gal)
1/24/2024 8:27
19.4
0
0
291
1/24/2024 8:42
25.3
0
0
379
1/24/2024 8:57
30.4
0
0
455
1/24/2024 9:12
23.8
0
0
358
1/24/2024 9:27
19.4
0
0
291
1/24/2024 9:42
35.5
0
0
532
1/24/2024 9:57
17.6
0
0
265
1/24/202410:12
22.9
0
0
343
1/24/202410:27
26.0
0
0
391
1/24/2024 10:42
19.9
0
0
298
1/24/2024 10:57
10.2
0
0
153
1/24/2024 11:12
12.5
0
0
187
1/24/2024 11:27
11.7
0
0
176
1/24/2024 11:42
10.0
0
0
150
1/24/2024 11:57
11.9
0
0
178
1/24/202412:12
8.8
0
0
132
1/24/2024 12:27
12.9
0
0
193
1/24/202412:42
3.9
0
0
58
1/24/2024 12:57
19.2
0
0
288
1/24/2024 13:12
15.5
0
0
232
1/24/2024 13:27
15.9
0
0
239
1/24/2024 13:42
14.1
0
0
211
1/24/2024 13:57
17.0
0
0
255
1/24/2024 14:12
18.5
0
0
278
1/24/202414:27
24.3
0
0
365
1/24/2024 14:42
14.1
0
0
211
1/24/2024 14: 5 7
10.8
0
0
161
1/24/202415:12
26.3
0
0
394
1/24/2024 15:27
13.1
0
0
196
1/24/2024 15:42
10.4
0
0
156
1/24/202415:57
23.8
0
0
358
1/24/202416:12
20.8
0
0
312
1/24/2024 16:27
15.3
0
0
229
1/24/202416:42
33.0
0
0
495
1/24/202416:57
21.2
0
0
319
1/24/202417:12
23.1
0
0
347
TR1156 Pagel of 3 June 2024

TABLE ATTl-3 Geosyntec Consultants of NC, P.C.
SEEP C FLOW THROUGH CELL (FTC) DATA
Chemours Fayetteville Works, North Carolina
Date/Time
Flow Rate m
(gp )
Bypass Spillway
Flow Rate (gpm)
Bypass Spillway
Volume (gal)
Flow Volume'
(gal)
1/24/202417:27
24.3
0
0
365
1/24/202417:42
48.2
0
0
723
1/24/202417:57
25.3
0
0
379
1/24/202418:12
39.4
0
0
590
1/24/202418:27
26.0
0
0
391
1/24/202418:42
38.5
0
0
578
1/24/202418:57
34.9
0
0
524
1/24/202419:12
34.4
0
0
515
1/24/202419:27
32.2
0
0
483
1/24/202419:42
30.1
0
0
452
1/24/202419:57
28.0
0
0
421
1/24/2024 20:12
19.9
0
0
298
1/24/2024 20:27
26.5
0
0
398
1/24/2024 20:42
16.6
0
0
248
1/24/2024 20:57
23.1
0
0
347
1/24/2024 21:12
16.8
0
0
252
1/24/2024 21:27
35.5
0
0
532
1/24/2024 21:42
20.8
0
0
312
1/24/2024 21:57
32.5
0
0
487
1/24/2024 22:12
24.6
0
0
368
1/24/2024 22:27
17.2
0
0
258
1/24/2024 22:42
26.5
0
0
398
1/24/2024 22:57
24.1
0
0
361
1/24/2024 23:12
24.6
0
0
368
1/24/2024 23:27
17.0
0
0
255
1/24/2024 23:42
23.6
0
0
354
1/24/2024 23:57
22.4
0
0
336
1/25/2024 0:12
25.3
0
0
379
1/25/2024 0:27
20.8
0
0
312
1/25/2024 0:42
22.6
0
0
340
1/25/2024 0:57
23.6
0
0
354
1/25/20241:12
25.1
0
0
376
1/25/20241:27
24.6
0
0
368
1/25/20241:42
29.8
0
0
448
1/25/20241:57
23.8
0
0
358
1/25/2024 2:12
27.8
0
0
417
TR1156 Page 2 of 3 June 2024

TABLE ATTl-3 Geosyntec Consultants of NC, P.C.
SEEP C FLOW THROUGH CELL (FTC) DATA
Chemours Fayetteville Works, North Carolina
Date/Time
Flow Rate m
(gpm)
Bypass Spillway
Flow Rate (gpm)
Bypass Spillway
Volume (gal)
Flow Volumes
(gal)
1/25/2024 2:27
25.3
0
0
379
1/25/2024 2:42
29.8
0
0
448
1/25/2024 2:57
36.0
0
0
540
1/25/2024 3:12
23.4
0
0
350
1/25/2024 3:27
14.3
0
0
214
1/25/2024 3:42
23.4
0
0
350
1/25/2024 3:57
24.8
0
0
372
1/25/2024 4:12
24.1
0
0
361
1/25/2024 4:27
24.6
0
0
368
1/25/2024 4:42
12.3
0
0
184
1/25/2024 4:57
20.1
0
0
301
1/25/2024 5:12
33.8
0
0
507
1/25/2024 5:27
29.8
0
0
448
1/25/2024 5:42
30.6
0
0
459
1/25/2024 5:57
17.0
0
0
255
1/25/2024 6:12
28.0
0
0
421
1/25/2024 6:27
35.5
0
0
532
1/25/2024 6:42
28.0
0
0
421
1/25/2024 6:57
31.4
0
0
471
1/25/2024 7:12
25.1
0
0
376
1/25/2024 7:27
25.8
0
0
387
Total Flow Volume (gal)
325364
Notes:
gal - gallons
gpm - gallons per minute
FTC - Flow Through Cell
1 - Flow volumes are calculated as the total volume of flow passing through the Flow through cell (FTC) for
the duration of the interval (15 mins). Where the interval duration is calculated as the time between the present
recording and the previous recording.
TR1156 Page 3 of 3 June 2024

TABLE ATTl-4 Geosyntec Consultants of NC, P.C.
SEEP D FLOW THROUGH CELL (FTC) DATA
Chemours Fayetteville Works, North Carolina
Date/Time
Flow Rate m
(gp )
Bypass Spillway
Flow Rate (gpm)
Bypass Spillway
Volume (gal)
Flow Volumes
(gal)
O1/24/24 9:29
0.9
0
0
13
O1/24/24 9:44
13.0
0
0
195
O1/24/24 9:59
0.0
0
0
0
01 /24/24 10:14
2.8
0
0
42
01/24/2410:29
5.2
0
0
78
01 /24/24 10:44
1.0
0
0
15
01/24/2410:59
0.0
0
0
0
01/24/2411:14
0.0
0
0
0
01/24/2411:29
0.0
0
0
0
01/24/2411:44
0.0
0
0
0
01/24/2411:59
0.0
0
0
0
01/24/2412:14
0.0
0
0
0
01/24/2412:29
0.0
0
0
0
01/24/2412:44
0.0
0
0
0
01/24/2412:59
0.0
0
0
0
01/24/2413:14
0.0
0
0
0
01/24/2413:29
0.0
0
0
0
01/24/2413:44
0.0
0
0
0
01/24/2413:59
0.0
0
0
0
01/24/2414:14
0.0
0
0
0
01/24/2414:29
3.4
0
0
51
01/24/2414:44
0.0
0
0
0
01/24/2414:59
0.0
0
0
0
01/24/2415:14
4.7
0
0
70
01/24/2415:29
0.0
0
0
0
01/24/2415:44
0.0
0
0
0
01/24/2415:59
3.3
0
0
49
01/24/24 16:14
1.3
0
0
20
01/24/2416:29
0.0
0
0
0
01 /24/24 16:44
10.3
0
0
154
O1/24/24 16:59
1.6
0
0
25
01/24/2417:14
3.6
0
0
53
01/24/2417:29
3.6
0
0
53
01/24/2417:44
26.9
0
0
404
01/24/2417:59
4.7
0
0
70
01 /24/24 18:14
18.0
0
0
269
01/24/2418:29
5.2
0
0
78
01 /24/24 18:44
16.4
0
0
246
O1/24/24 18:59
12.5
0
0
188
01 /24/24 19:14
11.4
0
0
171
01 /24/24 19:29
10.3
0
0
154
01/24/2419:44
8.6
0
0
129
01/24/2419:59
1 7.0
0
0
105
O1/24/24 20:14
1 1.8
0
1 0
27
TR1156 Page 1 of 3 June 2024

TABLE ATTl-4 Geosyntec Consultants of NC, P.C.
SEEP D FLOW THROUGH CELL (FTC) DATA
Chemours Fayetteville Works, North Carolina
Date/Time
Flow Rate m
(gp )
Bypass Spillway
Flow Rate (gpm)
Bypass Spillway
Volume (gal)
Flow Volumes
(gal)
O1/24/24 20:29
6.1
0
0
91
O1/24/24 20:44
0.0
0
0
0
O1/24/24 20:59
3.0
0
0
44
01 /24/24 21:14
0.0
0
0
0
01 /24/24 21:29
14.4
0
0
216
01 /24/24 21:44
1.2
0
0
18
O1/24/24 21:59
11.2
0
0
167
O1/24/24 22:14
4.7
0
0
70
O1/24/24 22:29
0.0
0
0
0
O1/24/24 22:44
5.7
0
0
86
O1/24/24 22:59
3.6
0
0
53
O1/24/24 23:14
4.7
0
0
70
O1/24/24 23:29
0.0
0
0
0
O1/24/24 23:44
3.1
0
0
47
O1/24/24 23:59
3.1
0
0
47
O1/25/24 0:14
5.0
0
0
75
O1/25/24 0:29
1.3
0
0
20
O1/25/24 0:44
2.8
0
0
42
O1/25/24 0:59
3.0
0
0
44
01/25/241:14
4.8
0
0
73
01/25/241:29
5.4
0
0
80
01/25/241:44
8.6
0
0
129
01/25/241:59
3.4
0
0
51
O1/25/24 2:14
7.0
0
0
105
O1/25/24 2:29
5.4
0
0
80
O1/25/24 2:44
9.0
0
0
135
O1/25/24 2:59
14.9
0
0
224
O1/25/24 3:14
4.0
0
0
60
O1/25/24 3:29
0.0
0
0
0
O1/25/24 3:44
3.6
0
0
53
O1/25/24 3:59
4.8
0
0
73
O1/25/24 4:14
4.2
0
0
63
O1/25/24 4:29
4.5
0
0
68
O1/25/24 4:44
0.0
0
0
0
O1/25/24 4:59
2.4
0
0
36
O1/25/24 5:14
13.2
0
0
198
O1/25/24 5:29
8.2
0
0
123
O1/25/24 5:44
10.1
0
0
151
O1/25/24 5:59
0.0
0
0
0
O1/25/24 6:14
8.2
0
0
123
O1/25/24 6:29
15.2
0
0
227
O1/25/24 6:44
8.2
0
0
123
O1/25/24 6:59
11.2
0
0
167
O1/25/24 7:14
5.2
0
0
78
TR1156 Page 2 of 3 June 2024

TABLE ATTl-4 Geosyntec Consultants of NC, P.C.
SEEP D FLOW THROUGH CELL (FTC) DATA
Chemours Fayetteville Works, North Carolina
Date/Time
Flow Rate (gpm)
Bypass Spillway
Flow Rate (gpm)
Bypass Spillway
Volume (gal)
Flow Volume'
(gal)
O1/25/24 7:29
6.6
0
0
99
O1/25/24 7:44
7.8
0
0
117
O1/25/24 7:59
4.8
0
0
73
O1/25/24 8:14
13.5
0
0
202
O1/25/24 8:29
3.1
0
0
47
Total Flow Volume (gal)
I --
6,706
Notes:
gal - gallons
gpm - gallons per minute
FTC - Flow Through Cell
1 - Flow volumes are calculated as the total volume of flow passing through the Flow through cell (FTC) for the
duration of the interval (15 mins). Where the interval duration is calculated as the time between the present
recording and the previous recording.
TR1156 Page 3 of 3 June 2024

TABLE ATT1-5 Geosymec Consultants of NC, P.C.
OUTFALL 003 STREAM VOLUMETRIC DISCHARGE CALCULATIONS
Chemours Fayetteville Works, North Carolina
Measurement
Point
Distance Along
Measured Cross
Section
Measured Water
Column Depth
Calculated Creek
a
Cell Area
Measured Creek
Velocity
Cell Velocity
Calculated
Discharge
Through Creek
Cell Areal
(ft)
(ft)
(ft�)
(ft/s)
(ft/s)
(ft3/s)
East Bank
0
0
0.02
0
0.06
0.001
B
0.5
0.08
0.04
0.10
0.12
0.01
T
0.5
0
0.15
B
1
0.08
0.05
0.10
0.25
0.01
T
1
0
0.14
B
1.5
0.13
0.05
0.28
0.27
0.01
T
1.5
0
0.46
B
2
0.08
0.05
0.12
0.23
0.01
T
2
0
0.21
B
2.5
0.13
0.07
0.23
0.24
0.02
T
2.5
0
0.35
B
3
0.17
0.10
0.14
0.22
0.02
T
3
0
0.24
B
3.5
0.25
0.13
0.17
0.24
0.03
M
3.5
0.13
0.24
T
3.5
0
0.26
B
4
0.25
0.09
0.10
0.22
0.02
M
4
0.13
0.24
T
4
0
0.29
B
4.5
0.13
0.05
0.13
0.14
0.01
T
4.5
0
0.25
B
5
0.08
0.04
0.06
0.06
0.003
T
5
0
0.10
B
5.5
0.08
0.02
0.05
0.02
0.0005
T
5.5
0
0.04
West Bank
6
0
0
Associated Measurement Notes
Location: Chemours Fayetteville
Station: Outfall 003 Treatment Plant Effluent Stream
Total Volumetric Discharge
(ft3/s) 0.15
(gpm) 65
(L/s) 4.1
Date: January 24, 2024
Acronyms
- - data not measured or calculated
B - Bottom depth of water
ft - feet
ftZ - square feet
ft3/s - cubic feet per second
gpm - gallons per minute
L/s - liters per second
M - Middle depth of water
T - Top depth of water (i.e., 0 ft)
Notes
1 - Discharge is calculated as product of creek velocity measured at the mid -depth (feet per second) times the cross sectional area of each
2 - Measurement cell areas are calculated assuming a trapezoidal geometry based on distances between measurement points and the
measured water column depths. A measurement cell is an areal section from the width of the river channel.
TR1156 Page 1 of 1 June 2024

TABLE ATT1-6 Geosyntec Consultants of NC, P.C.
WILLIS CREEK VOLUMETRIC DISCHARGE CALCULATIONS
Chemours Fayetteville Works, North Carolina
Measurement Point
Distance Along
Measured Cross
Section
Measured Water
Column Depth
Calculated Creek
a
Cell Area
Measured Creek
Velocity
Cell Velocity
Calculated Discharge
Through Creek Cell
�
Area
(ft)
(ft)
(ft)
(ft/s)
(ft/s)
(ft3/s)
South Bank
0
0.00
1.08
0.00
0.26
0.28
B
2
1.08
1.96
0.03
0.49
0.95
M
2
0.54
0.51
T
2
0.00
0.62
B
4
0.88
1.46
0.23
0.50
0.72
M
4
0.44
0.46
T
4
0.00
0.49
B
6
0.58
1.08
0.28
0.59
0.64
M
6
0.29
0.53
T
6
0.00
0.57
B
8
0.50
1.04
0.25
0.62
0.64
M
8
0.25
0.65
T
8
0.00
0.85
B
10
0.54
1.21
0.25
0.63
0.76
M
10
0.27
0.58
T
10
0.00
0.81
B
12
0.67
1.58
0.38
0.80
1.27
M
12
0.33
0.68
T
12
0.00
0.91
B
14
0.92
1.92
0.55
0.79
1.50
M
14
0.46
0.92
T
14
0.00
0.97
B
16
1.00
2.50
0.28
0.63
1.56
M
16
0.50
0.65
T
16
0.00
0.93
B
18
1.50
2.50
0.19
0.36
0.90
M
18
0.75
0.60
T
18
0.00
0.59
B
20
1.00
1.00
0.05
0.06
0.06
M
20
0.50
0.12
T
20
0.00
0.18
North Bank
22
0.00
0
Associated Measurement Notes
Location: Chemours Fayetteville
Station: Willis Creek 06 (SW-WC-06)
Total Volumetric Discharge
(ft3/s) 9.3
(gpm) 4,166
(L/s) 263
Date: January 24, 2024
Acronyms
- - data not measured or calculated
B - Bottom depth of water
ft - feet
ftz - square feet
ft3/s - cubic feet per second
gpm - gallons per minute
L/s - liters per second
M - Middle depth of water
T - Top depth of water (i.e., 0 ft)
Notes
1 - Discharge is calculated as product of creek velocity measured at the mid -depth (feet per second) times the cross sectional area of each measurement cell.
2 - Measurement cell areas are calculated assuming a trapezoidal geometry based on distances between measurement points and the measured water column
depths. A measurement cell is an areal section from the width of the river channel.
TR1156 Page 1 of 1 June 2024

TABLE ATT1-7 Geosyntec Consultants of NC, P.C.
GEORGIA BRANCH CREEK VOLUMETRIC DISCHARGE CALCULATIONS
Chemours Fayetteville Works, North Carolina
Location
Distance Along
Measured Cross
Section
Measured Water
Column Depth
Calculated Creek
z
Cell Area
Measured Creek
Velocity
Cell Velocity
Calculated Discharge
Through Creek Cell
Areal
(ft)
(ft)
ft�
(ft/s)
(ft/s)
ft3/s
SW Bank
0
0
8.50
0
0.10
0.87
B
1
17
17.50
0.06
0.213
3.72
M
1
12
0
M
1
6
0.21
T
1
0
0.19
B
2
18
18.00
0.08
0.21
3.74
M
2
12
0.21
M
2
6
0.23
T
2
0
0.2
B
3
18
17.50
0.13
0.21
3.68
M
3
12
0.17
M
3
6
0.22
T
3
0
0.19
B
4
17
16.00
0.19
0.22
3.52
M
4
12
0.22
M
4
6
0.23
T
4
0
0.2
B
5
15
13.50
0.17
0.15
2.06
M
5
12
0.21
M
5
6
0.22
T
5
0
0.18
B
6
12
10.00
0.06
0.08
0.80
M
6
6
0.09
T
6
0
0.07
B
7
8
4.00
0.02
0.04
0.14
M
7
4
0.07
T
7
0
0.05
NE Bank
8
0
0
Associated Measurement Notes
Location: Chemours Fayetteville
Station: Georgia Branch 05 (SW-GB-01)(L/s)
Total Volumetric Discharge
(ft3/s) 18.5
(gpm) 8,311
524
Date: January 24, 2024
Acronyms
- - data not measured or calculated
B - Bottom depth of water
ft - feet
ftz - square feet
ft3/s - cubic feet per second
gpm - gallons per minute
L/s - liters per second
M - Middle depth of water
T - Top depth of water (i.e., 0 ft)
Notes
1 - Discharge is calculated as product of creek velocity measured at the middle -depth (feet per second) times the cross sectional area of each measurement cell.
2 - Measurement cell areas are calculated assuming a trapezoidal geometry based on distances between measurement points and the measured water column
depths. A measurement cell is an areal section from the width of the river channel.
TR1156 Page 1 of 1 June 2024

TABLE ATTI-8 Geosyntee Consultants of NC, P.C.
OUTFALL 002 FLOW RATE
Chemours Fayetteville Works, North Carolina
Approximate Total
Q12024
Date
Outfall 002 Flow
Total Daily
Hours of Sample
Volume during 24
Quarterly Event
(MGD)
Volume (gal)
Collection
hour Sample
Collection (gal)
01 /24/2024
18.861
18, 861,000
15.6
12,259, 650
Jan 20241
01/25/2024
12.034
12,034,000
7.4
3,710,483
1/24/2024 8:24:00 AM to 1/25/2024 7:24:00 AM
23.0
15,970,133
Notes:
Daily flow rates collected from facility Discharge Monitoring Reports.
1 - Total flow volume for 24-hour temporal composite sample collected at 7:24 AM on 1/25/24 approximated based on
flow rates for 1/24/24 and 1/25/24.
Acronyms:
gal - gallons
MGD - millions of gallons per day
TR1156 Page 1 of 1 June 2024

Geosyntec Consultants of NC, P.C.
TABLE ATT1-9
FLOW DATA FOR W.O'HUSKE LOCK NR TAR HEEL, NC
Chemours Fayetteville Works, North Carolina
Q1 2024
Quarterly Event
Pathway/ Location
Sample Collection
Timepoint
1
Flow Gauging Location
Flow Rate (ft Grab Sample Instantaneous
s/s) 2
Jan 2024
Upstream River Water and
01/24/24 14:10
William O Huske Lock and
10,900
Groundwater
Dam
Notes:
1 - Flow rate measured at USGS gauging station #02105500 located at William O Huske Lock & Dam, North Carolina.
2 - Instantaneous flow rate for grab samples is the recorded flow rate at the time of grab sample collection.
Acronyms:
ft3/s - cubic feet per second
MGD - millions of gallons per day
TR1156 Page 1 of 1 June 2024

TABLE ATT1-10 Geosyntee Consultants of NC, P.C.
CHEMOURS FACILITY INTAKE FLOW RATE
Chemours Fayetteville Works, North Carolina
Intake Flow
Approximate Total
Q1 2024
Date
River Water Total
Total Daily
Hours of Sample
Volume during 24
Quarterly Event
Daily Flow
Volume (gal)
Collection
hour Sample
Average (gpm)
Collection (gal)
1/24/2024
8,155
11,743,690
15.9
7,780,194
Jan 20241
1/25/2024
8,260
11,894,745
7.10
3,518,862
1/24/24 8:06:00 AM to 1/25/24 7:06:00 AM
23.0
11,299,056
Notes:
Daily flow rates collected from facility Discharge Monitoring Reports.
1 - Total flow volume for 24-hour temporal composite sample collected at 7:06 am on 1/25/24 approximated based on
flow rates for 1/24/24 and 1/25/24.
Acronyms:
gal - gallons
gpm - gallons per minute
TR1156 Page 1 of 1 June 2024

TABLE ATT1-11
SEEP AND SURFACE WATER OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
CFR-BLADEN
CFR-KINGS
CFR-MILE-76
CFR-TARHEEL
CFR-TARHEEL
GBC-5
LOCK -DAM SEEP
Field Sample ID
CAP1Q24-CFR-BLADEN-
012424
CAP1Q24-CFR-KINGS-
012524
CAP1Q24-CFR-RM-76-
012424
CAP1Q24-CFR-TARHEEL
012424
CAP1Q24-CFR-TARHEEL
24-012524
CAPIQ24-GBC-5-012424
CAP1Q24-LOCK-DAM-
SEEP-012424
Sample Date
1/24/2024
1/25/2024
1/24/2024
1/24/2024
1/25/2024
1/24/2024
1/24/2024
QA/QC
Sample Matrix
LIQUID
LIQUID
LIQUID
LIQUID
Liquid
LIQUID
LIQUID
Sample Delivery Group(SDG)
320-109128-1
320-109128-1
320-109128-1
320-109128-1
320-109127-1
320-109128-1
320-109128-1
Lab Sample ID
320-109128-5
320-109128-7
320-109128-4
320-109128-6
320-109127-7
320-109128-1
320-109128-2
537 Mod (ng/L)
10:2 Fluorotelomer sulfonate
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<84
l l Cl-PF30UdS
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<40
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<58
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<30
2-(N-ethyl perfluoro-l-octanesulfonamido)-ethanol
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<110
2-(N-methyl perfluoro-l-octanesulfonamido)-ethanol
<4.0
<4.0
<4.0
<4.0
<4.0
<4.0
<180
6:2 Fluorotelomer sulfonate
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<310
9C1-PF30NS
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<30
DONA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<50
N-Ethyl Perfluorooctane Sulfonamidoacetic Acid
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<160
N-ethylperfluoro-l-octanesulfonamide
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<110
N-methyl perfluoro-l-octanesulfonamide
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<54
N-Methyl Perfluorooctane Sulfonamidoacetic Acid
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<150
Perfluorobutane Sulfonic Acid
4.8
4.3
5.6
4.8
5.0
2.8
<25
Perfluorobutanoic Acid
<5.0 UJ
<5.0 UJ
<5.0 UJ
<5.0 UJ
<5.0
<5.0 UJ
<300
Perfluorodecane Sulfonic Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<40
Perfluorodecanoic Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<39
Perfluorododecane Sulfonic Acid (PFDoS)
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<120
Perfluorododecanoic Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<69
Perfluoroheptane Sulfonic Acid (PFHpS)
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<24
Perfluoroheptanoic Acid
3.4
2.6
3.1
3.1
3.3
2.2
68
Perfluorohexadecanoic Acid (PFHxDA)
<2.0
<2.0
<2.0
<2.0 UJ
<2.0
<2.0
<110
Perfluorohexane Sulfonic Acid
3.2
2.7
3.2
3.0
3.4
<2.0
<71
Perfluorohexanoic Acid
7.5
6.2
7.2
7.4
7.7
2.2
<73
Perfluorononanesulfonic Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<46
Perfluorononanoic Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<34
Perfluorooctadecanoic Acid
<2.0
<2.0
<2.0
<2.0 UJ
<2.0 UJ
<2.0
<120
Perfluorooctane Sulfonamide
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<120
Perfluoropentane Sulfonic Acid (PFPeS)
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<38
Perfluoropentanoic Acid
6.9
5.8
6.9
6.7
6.7
7.6
360
Perfluorotetradecanoic Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<91
Perfluorotridecanoic Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<160
Perfluoroundecanoic Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<140
PFOA
7.2
6.5
6.8
6.9
7.5
4.2
<110
PFOS
1 12
1 11
1 12
1 12
1 12
1 <2.0
1 <68
TR1156 1 of 3 June 2024

TABLE ATT1-11
SEEP AND SURFACE WATER OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
LOCK -DAM SEEP
OLDOF-1
OUTFALL 002
RIVER WATER INTAKE
2
SEEP-A-EFF
SEEP-B-EFF
SEEP-C-EFF
Field Sample ID
CAP1Q24-LOCK-DAM-
SEEP-012424-D
CAP1Q24-OLDOF-1B-24-
012524
CAP1Q24-OUTFALL-002-
24-012524
RIVER -WATER-
INTAKE2-24-012524
CAP1Q24-SEEP-A-EFF-24
012524
CAP I Q24-SEEP-B-EFF-24-CAP1Q24-SEEP-C-EFF-24
012624
012524
Sample Date
1/24/2024
1/25/2024
1/25/2024
1/25/2024
1/25/2024
1/26/2024
1/25/2024
QA/QC
Field Duplicate
Sample Matrix
LIQUID
Liquid
Liquid
Liquid
Liquid
Liquid
Liquid
Sample Delivery Group (SDG)
320-109128-3
320-109127-1
320-109127-1
320-109127-1
320-109127-1
320-109219-1
320-109127-1
Lab Sample ID
320-109128-3
320-109127-6
320-109127-5
320-109127-2
320-109127-3
320-109219-1
320-109127-4
537 Mod (ng/L)
10:2 Fluorotelomer sulfonate
<84 UJ
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
11C1-PF30UdS
<40 UJ
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
<58 UJ
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
<30 UJ
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
2-(N-ethyl perfluoro-l-octanesulfonamido)-ethanol
<110 UJ
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
2-(N-methyl perfluoro-l-octanesulfonamido)-ethanol
<180 UJ
<4.0
<4.0
<4.0
<4.0
<4.0
<4.0
6:2 Fluorotelomer sulfonate
<310 UJ
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
9C1-PF30NS
<30 UJ
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
DONA
<50 UJ
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
N-Ethyl Perfluorooctane Sulfonamidoacetic Acid
<160 UJ
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
N-ethylperfluoro- 1 -octanesulfonamide
<110 UJ
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
N-methyl perfluoro-l-octanesulfonamide
<54 UJ
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
N-Methyl Perfluorooctane Sulfonamidoacetic Acid
<150 UJ
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
Perfluorobutane Sulfonic Acid
<25 UJ
<2.0
4.8
4.6
<2.0
<2.0
<2.0
Perfluorobutanoic Acid
<300 UJ
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
Perfluorodecane Sulfonic Acid
<40 UJ
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluorodecanoic Acid
<39 UJ
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluorododecane Sulfonic Acid (PFDoS)
<120 UJ
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluorododecanoic Acid
<69 UJ
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluoroheptane Sulfonic Acid (PFHpS)
<24 UJ
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluoroheptanoic Acid
75 J
<2.0
3.1
2.9
<2.0
<2.0
<2.0
Perfluorohexadecanoic Acid (PFHxDA)
<110 UJ
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluorohexane Sulfonic Acid
<71 UJ
<2.0
2.9
2.8
<2.0
<2.0
<2.0
Perfluorohexanoic Acid
<73 UJ
<2.0
7.3
7.4
<2.0
<2.0
<2.0
Perfluorononanesulfonic Acid
<46 UJ
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluorononanoic Acid
<34 UJ
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluorooctadecanoic Acid
<120 UJ
<2.0 UJ
<2.0 UJ
<2.0 UJ
<2.0 UJ
<2.0
<2.0 UJ
Perfluorooctane Sulfonamide
<120 UJ
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluoropentane Sulfonic Acid (PFPeS)
<38 UJ
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluoropentanoic Acid
430 J
6.7
7.2
6.9
<2.0
<2.0
<2.0
Perfluorotetradecanoic Acid
<91 UJ
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluorotridecanoic Acid
<160 UJ
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluoroundecanoic Acid
<140 UJ
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PFOA
<110 UJ
<2.0
6.9
6.4
<2.0
<2.0
<2.0
PFOS
<68 UJ
1 <2.0
1 9.9
1 8.9
1 <2.0
1 <2.0
1 <2.0
TR1156 2 of 3 June 2024

TABLE ATT1-11
SEEP AND SURFACE WATER OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Location ID
SEEP-D-EFF
WC-6
EB
EB
Field Sample ID
CAP1Q24-SEEP-D-EFF-24
012624
CAP1Q24-WC-6-24-012524
CAP1Q24-EQBLK-IS-
012524
CAP1Q24-EQBLK-PP-
012524
Sample Date
1/26/2024
1/25/2024
1/25/2024
1/25/2024
QA/QC
Equipment Blank
Equipment Blank
Sample Matrix
Liquid
Liquid
LIQUID
LIQUID
Sample Delivery Group (SDG)
320-109219-1
320-109127-1
320-109127-1
320-109127-1
Lab Sample ID
320-109219-2
320-109127-1
320-109127-9
320-109127-8
537 Mod (ng/L)
10:2 Fluorotelomer sulfonate
<2.0
<2.0
<2.0
<2.0
11C1-PF30UdS
<2.0
<2.0
<2.0
<2.0
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
<2.0
<2.0
<2.0
<2.0
11-1,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
<2.0
<2.0
<2.0
<2.0
2-(N-ethyl perfluoro-l-octanesulfonamido)-ethanol
<2.0
<2.0
<2.0
<2.0
2-(N-methyl perfluoro-l-octanesulfonamido)-ethanol
<4.0
<4.0
<4.0
<4.0
6:2 Fluorotelomer sulfonate
<5.0
<5.0
<5.0
<5.0
9C1-PF30NS
<2.0
<2.0
<2.0
<2.0
DONA
<2.0
<2.0
<2.0
<2.0
N-Ethyl Perfluorooctane Sulfonamidoacetic Acid
<5.0
<5.0
<5.0
<5.0
N-ethylperfluoro- 1 -octanesulfonamide
<2.0
<2.0
<2.0
<2.0
N-methyl perfluoro- 1 -octanesulfonamide
<2.0
<2.0
<2.0
<2.0
N-Methyl Perfluorooctane Sulfonamidoacetic Acid
<5.0
<5.0
<5.0
<5.0
Perfluorobutane Sulfonic Acid
<2.0
7.3
<2.0
<2.0
Perfluorobutanoic Acid
<5.0
<5.0
<5.0
<5.0
Perfluorodecane Sulfonic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorodecanoic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorododecane Sulfonic Acid (PFDoS)
<2.0
<2.0
<2.0
<2.0
Perfluorododecanoic Acid
<2.0
<2.0
<2.0
<2.0
Perfluoroheptane Sulfonic Acid (PFHpS)
<2.0
<2.0
<2.0
<2.0
Perfluoroheptanoic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorohexadecanoic Acid (PFHxDA)
<2.0
<2.0
<2.0
<2.0
Perfluorohexane Sulfonic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorohexanoic Acid
<2.0
2.8
<2.0
<2.0
Perfluorononanesulfonic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorononanoic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorooctadecanoic Acid
<2.0
<2.0 UJ
<2.0 UJ
<2.0 UJ
Perfluorooctane Sulfonamide
<2.0
<2.0
<2.0
<2.0
Perfluoropentane Sulfonic Acid (PFPeS)
<2.0
<2.0
<2.0
<2.0
Perfluoropentanoic Acid
<2.0
6.0
<2.0
<2.0
Perfluorotetradecanoic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorotridecanoic Acid
<2.0
<2.0
<2.0
<2.0
Perfluoroundecanoic Acid
<2.0
<2.0
<2.0
<2.0
PFOA
<2.0
4.6
<2.0
<2.0
PFOS
1 <2.0
1 <2.0
1 <2.0
1 <2.0
Geosyntec Consultants of NC, P.C.
Notes:
Bold - Analyte detected above associated reporting limit
J - Analyte detected. Reported value may not be accurate
or precise
UJ - Analyte not detected. Reporting limit may not be
accurate or precise.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
< - Analyte not detected above associated reporting limit.
-- - Not measured / Not Applicable
TR1156 3 of 3 June 2024

TABLE ATT1-12
GROUNDWATER OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Water Bearing Unit'
Black Creek Aquifer
Black Creek Aquifer
Black Creek Aquifer
Floodplain Deposits
Floodplain Deposits
Black Creek Aquifer
Location ID
BLADEN-1DR
LTW-01
LTW-02
LTW-03
LTW-04
LTW-05
Field Sample ID
CAP1Q24-BLADEN-IDR-011524
CAP1Q24-LTW-01-011724
CAP1Q24-LTW-02-011724
CAP1Q24-LTW-03-013124
CAP1Q24-LTW-04-011624
CAP1Q24-LTW-05-011524
Sample Date
1/15/2024
1/17/2024
1/17/2024
1/31/2024
1/16/2024
1/15/2024
QA/QC
Sample Delivery Group(SDG)
320-108762-1
320-109020-1
320-109020-1
320-109381-1
320-108762-1
320-108762-1
Lab Sample ID
320-108762-10
320-109020-1
320-109020-2
320-109381-7
320-108762-5
320-108762-9
537Mod (ng/L)
10:2 Fluorotelomer sulfonate
<84
<84
<84
<84
<84
<84
l l Cl-PF30UdS
<40
<40
<40
<40
<40
<40
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
<58
<58
<58
<58
<58
<58
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
<30
<30
<30
<30
<30
<30
2-(N-ethyl perfluoro-l-octanesulfonamido)-ethanol
<110
<110
<110
<110
<110
<110
2-(N-methyl perfluoro-l-octanesulfonamido)-ethanol
<180
<180
<180
<180
<180
<180
6:2 Fluorotelomer sulfonate
<310
<310
<310
<310
<310
<310
9C1-PF30NS
<30
<30
<30
<30
<30
<30
DONA
<50
<50
<50
<50
<50
<50
N-Ethyl Perfluorooctane Sulfonamidoacetic Acid
<160
<160
<160
<160
<160
<160
N-ethylperfluoro-l-octanesulfonamide
<110
<110
<110
<110
<110
<110
N-methyl perfluoro-l-octanesulfonamide
<54
<54
<54
<54
<54
<54
N-Methyl Perfluorooctane Sulfonamidoacetic Acid
<150
<150
<150
<150
<150
<150
Perfluorobutane Sulfonic Acid
<25
<25
<25
<25
<25
<25
Perfluorobutanoic Acid
<300
<300
<300
<300
<300
420
Perfluorodecane Sulfonic Acid
<40
<40
<40
<40
<40
<40
Perfluorodecanoic Acid
<39
<39
<39
<39
<39
<39
Perfluorododecane Sulfonic Acid (PFDoS)
<120
<120
<120
<120
<120
<120
Perfluorododecanoic Acid
<69
<69
<69
<69
<69
<69
Perfluoroheptane Sulfonic Acid (PFHpS)
<24
<24
<24
<24
<24
<24
Perfluoroheptanoic Acid
<31
40
<31
<31
68
310
Perfluorohexadecanoic Acid (PFHxDA)
<110
<110
<110
<110
<110
<110
Perfluorohexane Sulfonic Acid
<71
<71
<71
<71
<71
<71
Perfluorohexanoic Acid
<73
<73
<73
<73
<73
99
Perfluorononanesulfonic Acid
<46
<46
<46
<46
<46
<46
Perfluorononanoic Acid
<34
<34
<34
<34
<34
<34
Perfluorooctadecanoic Acid
<120
<120
<120
<120
<120
<120
Perfluorooctane Sulfonamide
<120
<120
<120
<120
<120
<120
Perfluoropentane Sulfonic Acid (PFPeS)
<38
<38
<38
<38
<38
<38
Perfluoropentanoic Acid
<61
220
320
560 J
1,100
2,700
Perfluorotetradecanoic Acid
<91
<91
<91
<91
<91
<91
Perfluorotridecanoic Acid
<160
<160
<160
<160
<160
<160
Perfluoroundecanoic Acid
<140
<140
<140
<140
<140
<140
PFOA
<110
<110
<110
<110
<110
<110
PFOS
<68
1 <68
1 <68
1 <68
1 <68
1 <68
TR1156 1 of 5 June 2024

TABLE ATT1-12
GROUNDWATER OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Water Bearing Unit'
Black Creek Aquifer
Black Creek Aquifer
Floodplain Deposits
Black Creek Aquifer
Black Creek Aquifer
Black Creek Aquifer
Location ID
OW-28
OW-33
PIW-1S
PIW-1D
PIW-3D
PIW-7D
Field Sample ID
CAP4Q23-OW-28-011824
CAP1Q24-OW-33-013024
CAP1Q24-PIW-1S-011624
CAP1Q24-PIW-1D-012224
CAP1Q24-PIW-3D-011824
CAP1Q24-PIW-7D-011524-D
Sample Date
01/18/2024
01/30/2024
1/16/2024
1/22/2024
1/18/2024
1/15/2024
QA/QC
Field Duplicate
Sample Delivery Group(SDG)
320-109020-1
320-109381-1
320-108762-1
320-109019-1
320-109020-1
320-108762-1
Lab Sample ID
320-109020-9
320-109381-5
320-108762-7
320-109019-1
320-109020-7
320-108762-2
537 Mod (ng/L)
10:2 Fluorotelomer sulfonate
<84
<84
<84
<84
<84
<84
l l Cl-PF30UdS
<40
<40
<40
<40
<40
<40
1H,1H,2H,2H-perfluorodexanesulfonate (8:2 FTS)
<58
<58
<58
<58
<58
<58
11-1,1H,2H,21-1-perfluorohexanesulfonate (4:2 FTS)
<30
<30
<30
<30
<30
<30
2-(N-ethyl perfluoro-l-octanesulfonamido)-ethanol
<110
<110
<110
<110
<110
<110
2-(N-methyl perfluoro-l-octanesulfonamido)-ethanol
<180
<180
<180
<180
<180
<180
6:2 Fluorotelomer sulfonate
880
<310
<310
1,200
<310
<310 UJ
9C1-PF30NS
<30
<50
<160
<110
<54
<30
<30
<30
<30
<30
DONA
<50
<50
<50
<50
<50
N-Ethyl Perfluorooctane Sulfonamidoacetic Acid
<160
<160
<160
<160
<160
N-ethylperfluoro-l-octanesulfonamide
<110
<110
<110
<110
<110
N-methyl perfluoro-l-octanesulfonamide
<54
<54
<54
<54
<54
N-Methyl Perfluorooctane Sulfonamidoacetic Acid
<150
<150
<150
<150
<150
<150
Perfluorobutane Sulfonic Acid
<25
<25
<25
<25
<25
<25
Perfluorobutanoic Acid
<300
<300
<300
<300
<300
<300
Perfluorodecane Sulfonic Acid
<40
<40
<40
<40
<40
<40
Perfluorodecanoic Acid
<39
<39
<39
<39
<39
<39
Perfluorododecane Sulfonic Acid (PFDoS)
<120
<120
<120
<120
<120
<120
Perfluorododecanoic Acid
<69
<69
<69
<69
<69
<69
Perfluoroheptane Sulfonic Acid (PFHpS)
<24
<24
<24
<24
<24
<24
Perfluoroheptanoic Acid
<31
<31
<31
<31
44
100
Perfluorohexadecanoic Acid (PFHxDA)
<110
<110
<110
<110
<110
<110
Perfluorohexane Sulfonic Acid
<71
<71
<71
<71
<71
<71
Perfluorohexanoic Acid
<73
<73
<73
<73
<73
<73
Perfluorononanesulfonic Acid
<46
<46
<46
<46
<46
<46
Perfluorononanoic Acid
<34
<34
<34
<34
<34
<34
Perfluorooctadecanoic Acid
<120
<120
<120
<120
<120
<120
Perfluorooctane Sulfonamide
<120
<120
<120
<120
<120
<120
Perfluoropentane Sulfonic Acid (PFPeS)
<38
<38
<38
<38
<38
<38
Perfluoropentanoic Acid
69
120 J
<61
150
250
1,300
Perfluorotetradecanoic Acid
<91
<91
<91
<91
<91
<91
Perfluorotridecanoic Acid
<160
<160
<160
<160
<160
<160
Perfluoroundecanoic Acid
<140
<140
<140
<140
<140
<140
PFOA
<110
<110
<110
<110
<110
<110
PFOS
<68
1 <68
1 <68
1 <68
1 <68
1 <68
TR1156 2 of 5 June 2024

TABLE ATT1-12
GROUNDWATER OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Water Bearing Unit'
Floodplain Deposits
Surficial Aquifer
Surficial Aquifer
Surficial Aquifer
Surficial Aquifer
Black Creek Aquifer
Location ID
PIW-7S
PW-04
PW-04
PW-06
PW-07
PW-09
Field Sample ID
CAP1Q24-PIW-7S-011524
CAP1Q24-PW-04-011724
CAP1Q24-PW-04-011724-Z
CAP1Q24-PW-06-011524
CAP1Q24-PW-07-020724
CAP1Q24-PW-09-012324
Sample Date
1/15/2024
1/17/2024
1/17/2024
1/15/2024
2/7/2024
1/23/2024
QA/QC
Sample Delivery Group (SDG)
320-108762-1
320-109020-1
320-109020-1
320-108762-1
320-109816-1
320-109223-1
Lab Sample ID
320-108762-3
320-109020-5
320-109020-6
320-108762-8
320-109816-1
320-109223-1
537 Mod (ng/L)
10:2 Fluorotelomer sulfonate
<84
<84
<84
<84
<84 UJ
<2.0
l lC1-PF30UdS
<40
<40
<40
<40
<40 UJ
<2.0
1H,1H,2H,2H-perfluorodexanesulfonate (8:2 FTS)
<58
<58
<58
<58
<58 UJ
<2.0
11-1,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
<30
<30
<30
<30
<30 UJ
<2.0
2-(N-ethyl perfluoro-l-octanesulfonamido)-ethanol
<110
<110
<110
<110
<110 UJ
<2.0
2-(N-methyl perfluoro-l-octanesulfonamido)-ethanol
<180
<180
<180
<180
<180 UJ
<4.0
6:2 Fluorotelomer sulfonate
<310
<310
<310
<310 UJ
<310 UJ
<5.0
9C1-PF30NS
<30
<30
<30
<30
<30 UJ
<2.0
DONA
<50
<160
<110
<50
<50
<50
<50 UJ
<2.0
N-Ethyl Perfluorooctane Sulfonamidoacetic Acid
<160
<160
<160
<160 UJ
<5.0
N-ethylperfluoro-l-octanesulfonamide
<110
<110
<110
<110 UJ
<2.0
N-methyl perfluoro-l-octanesulfonamide
<54
<54
<54
<54
<54 UJ
<2.0
N-Methyl Perfluorooctane Sulfonamidoacetic Acid
<150
<150
<150
<150
<150 UJ
<5.0
Perfluorobutane Sulfonic Acid
<25
<25
<25
<25
<25 UJ
<2.0
Perfluorobutanoic Acid
<300
<300
<300
<300
<300 UJ
<5.0 UJ
Perfluorodecane Sulfonic Acid
<40
<40
<40
<40
<40 UJ
<2.0
Perfluorodecanoic Acid
<39
<39
<39
<39
<39 UJ
<2.0
Perfluorododecane Sulfonic Acid (PFDoS)
<120
<120
<120
<120
<120 UJ
<2.0
Perfluorododecanoic Acid
<69
<69
<69
<69
<69 UJ
<2.0
Perfluoroheptane Sulfonic Acid (PFHpS)
<24
<24
<24
<24
<24 UJ
<2.0
Perfluoroheptanoic Acid
56
<31
<31
<31
<31 UJ
<2.0
Perfluorohexadecanoic Acid (PFHxDA)
<110
<110
<110
<110
<110 UJ
<2.0
Perfluorohexane Sulfonic Acid
<71
<71
<71
<71
<71 UJ
<2.0
Perfluorohexanoic Acid
<73
<73
<73
<73
<73 UJ
<2.0
Perfluorononanesulfonic Acid
<46
<46
<46
<46
<46 UJ
<2.0
Perfluorononanoic Acid
<34
<34
<34
<34
<34 UJ
<2.0
Perfluorooctadecanoic Acid
<120
<120
<120
<120
<120 UJ
<2.0
Perfluorooctane Sulfonamide
<120
<120
<120
<120
<120 UJ
<2.0
Perfluoropentane Sulfonic Acid (PFPeS)
<38
<38
<38
<38
<38 UJ
<2.0
Perfluoropentanoic Acid
580
<61
<61
<61
<61 UJ
<2.0
Perfluorotetradecanoic Acid
<91
<91
<91
<91
<91 UJ
<2.0
Perfluorotridecanoic Acid
<160
<160
<160
<160
<160 UJ
<2.0
Perfluoroundecanoic Acid
<140
<140
<140
<140
<140 UJ
<2.0
PFOA
<110
<110
<110
<110
<110 UJ
<2.0
PFOS
<68
1 <68
1 <68
1 <68
1 <68 UJ
<2.0
TR1156 3 of 5 June 2024

TABLE ATT1-12
GROUNDWATER OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Water Bearing Unit'
Black Creek Aquifer
Black Creek Aquifer
Surficial Aquifer
Surficial Aquifer
Black Creek Aquifer
--
Location ID
PW-09
PZ-22
SMW-10
SMW-11
SMW-12
EB
Field Sample ID
CAP1Q24-PW-09-012324-D
CAP1Q24-PZ-22-011624
CAP1Q24-SMW-10-011724
CAP1Q24-SMW-11-011824
CAP1Q24-SMW-12-011624
CAP1Q24-EQBLK-PP-011724
Sample Date
1/23/2024
1/16/2024
1/17/2024
1/18/2024
1/16/2024
1/17/2024
QA/QC
Field Duplicate
Equipment Blank
Sample Delivery Group (SDG)
320-109223-1
320-108762-1
320-109020-1
320-109020-1
320-108762-1
320-108762-1
Lab Sample ID
320-109223-2
320-108762-6
320-109020-4
320-109020-8
320-108762-4
320-108762-11
537 Mod (ng/L)
10:2 Fluorotelomer sulfonate
<2.0
<84
<2.0
<84
<84
<2.0
l l Cl-PF30UdS
<2.0
<40
<2.0
<40
<40
<2.0
1H,1H,2H,2H-perfluorodexanesulfonate (8:2 FTS)
<2.0
<58
<2.0
<58
<58
<2.0
11-1,1H,2H,21-1-perfluorohexanesulfonate (4:2 FTS)
<2.0
<30
<2.0
<30
<30
<2.0
2-(N-ethyl perfluoro-l-octanesulfonamido)-ethanol
<2.0
<110
<2.0
<110
<110
<2.0
2-(N-methyl perfluoro-l-octanesulfonamido)-ethanol
<4.0
<180
<4.0
<180
<180
<4.0
6:2 Fluorotelomer sulfonate
<5.0
<310 UJ
<5.0
<310
<310
<5.0
9C1-PF30NS
<2.0
<30
<2.0
<30
<30
<2.0
DONA
<2.0
<50
<2.0
<50
<50
<2.0
N-Ethyl Perfluorooctane Sulfonamidoacetic Acid
<5.0
<160
<5.0
<160
<160
<5.0
N-ethylperfluoro-l-octanesulfonamide
<2.0
<110
<2.0
<110
<110
<2.0
N-methyl perfluoro-l-octanesulfonamide
<2.0
<54
<2.0
<54
<54
<2.0
N-Methyl Perfluorooctane Sulfonamidoacetic Acid
<5.0
<150
<5.0
<150
<150
<5.0
Perfluorobutane Sulfonic Acid
<2.0
<5.0
<2.0
<25
<2.0
<25
<25
<2.0
Perfluorobutanoic Acid
<300
<5.0
<300
<300
<5.0
Perfluorodecane Sulfonic Acid
<40
<2.0
<40
<40
<2.0
Perfluorodecanoic Acid
<2.0
<39
<2.0
<39
<39
<2.0
Perfluorododecane Sulfonic Acid (PFDoS)
<2.0
<120
<2.0
<120
<120
<2.0
Perfluorododecanoic Acid
<2.0
<69
<2.0
<69
<69
<2.0
Perfluoroheptane Sulfonic Acid (PFHpS)
<2.0
<24
<2.0
<24
<24
<2.0
Perfluoroheptanoic Acid
<2.0
36
<2.0
32
<31
<2.0
Perfluorohexadecanoic Acid (PFHxDA)
<2.0
<110
<2.0
<110
<110
<2.0
Perfluorohexane Sulfonic Acid
<2.0
<71
<2.0
<71
<71
<2.0
Perfluorohexanoic Acid
<2.0
<73
<2.0
<73
<73
<2.0
Perfluorononanesulfonic Acid
<2.0
<46
<2.0
<46
<46
<2.0
Perfluorononanoic Acid
<2.0
<34
<2.0
<34
<34
<2.0
Perfluorooctadecanoic Acid
<2.0
<120
<2.0
<120
<120
<2.0
Perfluorooctane Sulfonamide
<2.0
<120
<2.0
<120
<120
<2.0
Perfluoropentane Sulfonic Acid (PFPeS)
<2.0
<38
<2.0
<38
<38
<2.0
Perfluoropentanoic Acid
<2.0
880
<2.0
<61
83
<2.0
Perfluorotetradecanoic Acid
<2.0
<91
<2.0
<91
<91
<2.0
Perfluorotridecanoic Acid
<2.0
<160
<2.0
<160
<160
<2.0
Perfluoroundecanoic Acid
<2.0
<2.0
<140
<2.0
<140
<140
<2.0
PFOA
<110
<2.0
230
<110
<2.0
PFOS
<2.0
1 <68
1 <2.0
1 <68
1 <68
1 <2.0
TR1156 4 of 5 June 2024

TABLE ATT1-12
GROUNDWATER OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Water Bearing Unit'
--
--
--
--
Location ID
EB
EB
EB
EB
Field Sample ID
CAP1Q24-EQBLK-BAILER-
012224
CAP1Q24-EQBLK-BAILER-
012224-Z
CAP1Q24-EQBLK-DV-012224
CAP1Q24-EQBLK-BP-020224
Sample Date
1/22/2024
1/22/2024
1/22/2024
2/2/2024
QA/QC
Equipment Blank
Equipment Blank
Equipment Blank
Equipment Blank
Sample Delivery Group (SDG)
320-109019-1
320-109019-1
320-109019-1
320-109475-1
Lab Sample ID
320-109019-6
320-109019-7
320-109019-5
320-109475-3
537 Mod (ng/L)
10:2 Fluorotelomer sulfonate
<2.0
<2.0
<2.0
<2.0
l l Cl-PF30UdS
<2.0
<2.0
<2.0
<2.0
1H,1H,2H,2H-perfluorodexanesulfonate (8:2 FTS)
<2.0
<2.0
<2.0
<2.0
11-1,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
<2.0
<2.0
<2.0
<2.0
2-(N-ethyl perfluoro-l-octanesulfonamido)-ethanol
<2.0
<2.0
<2.0
<2.0
2-(N-methyl perfluoro-l-octanesulfonamido)-ethanol
<4.0
<4.0
<4.0
<4.0
6:2 Fluorotelomer sulfonate
<5.0
<5.0
<5.0
<5.0
9C1-PF30NS
<2.0
<2.0
<2.0
<2.0
DONA
<2.0
<2.0
<2.0
<2.0
N-Ethyl Perfluorooctane Sulfonamidoacetic Acid
<5.0
<5.0
<5.0
<5.0
N-ethylperfluoro-l-octanesulfonamide
<2.0
<2.0
<2.0
<2.0
N-methyl perfluoro-l-octanesulfonamide
<2.0
<2.0
<2.0
<2.0
N-Methyl Perfluorooctane Sulfonamidoacetic Acid
<5.0
<5.0
<5.0
<5.0
Perfluorobutane Sulfonic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorobutanoic Acid
<5.0
<5.0
<5.0
<5.0
Perfluorodecane Sulfonic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorodecanoic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorododecane Sulfonic Acid (PFDoS)
<2.0
<2.0
<2.0
<2.0
Perfluorododecanoic Acid
<2.0
<2.0
<2.0
<2.0
Perfluoroheptane Sulfonic Acid (PFHpS)
<2.0
<2.0
<2.0
<2.0
Perfluoroheptanoic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorohexadecanoic Acid (PFHxDA)
<2.0
<2.0
<2.0
<2.0
Perfluorohexane Sulfonic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorohexanoic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorononanesulfonic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorononanoic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorooctadecanoic Acid
<2.0
<2.0
<2.0
<2.0 UJ
Perfluorooctane Sulfonamide
<2.0
<2.0
<2.0
<2.0
Perfluoropentane Sulfonic Acid (PFPeS)
<2.0
<2.0
<2.0
<2.0
Perfluoropentanoic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorotetradecanoic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorotridecanoic Acid
<2.0
<2.0
<2.0
<2.0
Perfluoroundecanoic Acid
<2.0
<2.0
<2.0
<2.0
PFOA
<2.0
<2.0
<2.0
<2.0
PFOS
<2.0
1 <2.0
1 <2.0
1 <2.0
Geosyntec Consultants of NC, P.C.
Notes:
1 - Refers to the primary aquifer unit that the well screen is
estimated to be screened within.
Bold - Analyte detected above associated reporting limit.
J - Analyte detected. Reported value may not be accurate or
precise.
UJ - Analyte not detected. Reporting limit may not be
accurate or precise.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
SDG - Sample Delivery Group
"-Z" in Sample ID denotes field filtration
< - Analyte not detected above associated reporting limit. --
- Not measured / Not Applicable
TR1156 5 of 5 June 2024

TABLE ATT1-13
TABLE 3+ PFAS MASS DISCHARGE BY PATHWAY DOWNGRADIENT OF REMEDIES (AFTER REMEDIES)
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Pathway Number'
1
2
4
4A
Pathway Name
Upstream River Water and
Groundwater
Willis Creek
3
Outfall 002
a
Stormwater Treatment System
Flow (MG)
7,009
6
16
--
Program
CAP SW Sampling 1Q24
CAP SW Sampling 1Q24
CAP SW Sampling 1Q24
STS Compliance Sampling
Location ID
CFR-MILE-76
WC-6
OUTFALL 002
STS DISCHARGE
Field Sample ID
CAP 1Q24-CFR-RM-76-012424
CAP1Q24-WC-6-24-012524
CAP1Q24-OUTFALL-002-24-
012524
--
Sample Date and Time
01/24/24
01/25/24
01/25/24
Sample Deliver Group (SDG)
320-109128-1
320-109127-1
320-109127-1
--
Lab Sample ID
320-109128-4
320-109127-1
320-109127-5
Sample Type
Grab
Composite
Composite
--
Table 3+ Lab SOP Mass Discharge 6 (mg/s)
HFPO-DA
ND
0.04
0.01
--
PFMOAA
ND
0.16
2.8E-03
--
PF02HxA
ND
0.07
1.7E-03
--
PF030A
ND
0.01
ND
--
PF04DA
ND
1.6E-03
ND
--
PF05DA
ND
ND
ND
--
PMPA
0.95
0.06
9.8E-04
--
PEPA
ND
0.01
ND
--
PS Acid
ND
ND
ND
Hydro -PS Acid
ND
2.0E-03
ND
--
R-PSDA
ND
7.9E-03
0.01
Hydrolyzed PSDA
ND
0.03
0.02
--
R-PSDCA
ND
ND
ND
--
NVHOS, Acid Form
ND
3.2E-03
ND
--
EVE Acid
ND
ND
ND
Hydro -EVE Acid
ND
8.4E-04
ND
--
R-EVE
ND
3.9E-03
ND
--
PES
ND
ND
ND
--
PFECA B
ND
ND
ND
--
PFECA-G
ND
ND
ND
--
PFPrA
5.83
0.11
7.0E-03
--
Total Attachment C Mass Discharge 7,8
ND
0.34
0.02
--
Total Table 3+ Mass Discharge (17 compounds) 7,9
ND
0.37
0.03
--
Total Table 3+ Mass Discharge (18 compounds) 7 '10
5.83
0.47
0.03
--
Total Table 3+ Mass Discharge (21 Compounds) 7
5.83
0.50
0.07
--
TR1156 Page 1 of 4 June 2024

TABLE ATT1-13
TABLE 3+ PFAS MASS DISCHARGE BY PATHWAY DOWNGRADIENT OF REMEDIES (AFTER REMEDIES)
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Pathway Number'
5
6A
6B
6C
Pathway Name
Onsite Groundwater
Seep A
Seep B
Seep C
Flow (MG)
--
0.05
0.02
0.03
Program
--
CAP SW Sampling 1Q24
CAP SW Sampling 1Q24
CAP SW Sampling 1Q24
Location ID
--
SEEP-A-EFF
SEEP-B-EFF
SEEP-C-EFF
Field Sample ID
--
CAP1Q24-SEEP-A-EFF-24-012524
CAP1Q24-SEEP-B-EFF-24-012624
CAP1Q24-SEEP-C-EFF-24-012524
Sample Date and Time
--
01/25/24
01/26/24
01/25/24
Sample Deliver Group (SDG)
--
320-109127-1
320-109219-1
320-109127-1
Lab Sample ID
--
320-109127-3
320-109219-1
320-109127-4
Sample Type
--
Composite
Composite
Composite
Table 3+ Lab SOP Mass Discharge 6 (mg/s)
HFPO-DA
3.7E-03
ND
5.2E-06
9.4E-06
PFMOAA
0.02
4.4E-05
5.7E-05
5.2E-05
PF02HxA
0.01
5.8E-06
7.2E-06
1.1E-05
PF030A
1.6E-03
ND
ND
ND
PF04DA
1.4E-04
ND
ND
ND
PF05DA
ND
ND
ND
ND
PMPA
3.1E-03
1.4E-05
1.6E-05
1.8E-05
PEPA
1.1E-03
ND
3.9E-06
ND
PS Acid
ND
ND
ND
ND
Hydro -PS Acid
3.6E-05
ND
ND
ND
R-PSDA
1.9E-04
ND
ND
ND
Hydrolyzed PSDA
3.2E-04
ND
1.9E-06
ND
R-PSDCA
ND
ND
ND
ND
NVHOS, Acid Form
2.1E-04
ND
ND
ND
EVE Acid
ND
ND
ND
ND
Hydro -EVE Acid
5.6E-05
ND
ND
ND
R-EVE
1.3E-04
ND
ND
ND
PES
ND
ND
ND
ND
PFECA B
ND
ND
ND
ND
PFECA-G
ND
ND
ND
ND
PFPrA
ND
8.4E-05
4.8E-05
1.8E-04
Total Attachment C Mass Discharge 7,8
0.04
6.4E-05
8.7E-05
9.1E-05
Total Table 3+ Mass Discharge 17 compounds) 7,9
0.04
6.4E-05
8.7E-05
9.1E-05
Total Table 3+ Mass Discharge (18 compounds) 7,10
0.05
1.5E-04
1.4E-04
2.7E-04
Total Table 3+ Mass Discharge 21 Com ounds)7
0.05
1.5E-04
1.4E-04
2.7E-04
TR1156 Page 2 of 4 June 2024

TABLE ATT1-13
TABLE 3+ PFAS MASS DISCHARGE BY PATHWAY DOWNGRADIENT OF REMEDIES (AFTER REMEDIES)
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Pathway Number'
6D
6E
6F
7
Pathway Name
Seep D
Lock and Dam Seep
Lock and Dam North
Outfall 003 Stream
Flow (MG)
0.01
0.02
--
0.09
Program
CAP SW Sampling 1Q24
CAP SW Sampling 1Q24
--
CAP SW Sampling 1Q24
Location ID
SEEP-D-EFF
Lock -Dam Seep
Lock -Dam North
OLDOF-1
Field Sample ID
CAP1Q24-SEEP-D-EFF-24-012624
CAP1Q24-LOCK-DAM-SEEP-012424
--
CAP1Q24-OLDOF-1B-24-012524
Sample Date and Time
01/26/24
01/24/24
--
01/25/24
Sample Deliver Group (SDG)
320-109219-1
320-109128-1
--
320-109127-1
Lab Sample ID
320-109219-2
320-109128-2
--
320-109127-6
Sample Type
Composite
Grab
Grab
Composite
Table 3+ Lab SOP Mass Discharge 6 (mg/s)
--
HFPO-DA
ND
4.8E-03
ND
1.1E-03
PFMOAA
6.8E-06
0.04
ND
4.1E-03
PF02HxA
ND
0.02
ND
1.8E-03
PF030A
ND
8.1E-03
ND
4.5E-04
PF04DA
ND
1.1E-03
ND
1.7E-04
PF05DA
ND
1.1E-04
ND
1.3E-04
PMPA
6.5E-07
4.3E-03
ND
6.2E-04
PEPA
ND
1.7E-03
ND
2.1E-04
PS Acid
ND
ND
ND
ND
Hydro -PS Acid
ND
1.2E-04
ND
6.2E-05
R-PSDA
ND
5.1E-04
ND
7.8E-05
Hydrolyzed PSDA
ND
3.2E-04
ND
1.5E-04
R-PSDCA
ND
ND
ND
ND
NVHOS, Acid Form
ND
6.5E-04
ND
7.8E-05
EVE Acid
ND
ND
ND
ND
Hydro -EVE Acid
ND
1.0E-04
ND
3.1E-05
R-EVE
ND
1.3E-04
ND
5.3E-05
PES
ND
ND
ND
ND
PFECA B
ND
ND
ND
ND
PFECA-G
ND
ND
ND
ND
PFPrA
7.3E-06
0.01
ND
2.4E-03
Total Attachment C Mass Discharge 7,8
7.3E-06
0.07
ND
0.01
Total Table 3+ Mass Discharge 17 compounds) 7,9
7.3E-06
0.08
ND
0.01
Total Table 3+ Mass Discharge (18 compounds) 7,10
1.5E-05
0.09
ND
0.01
Total Table 3+ Mass Discharge (21 Com ounds)7
1.5E-05
0.10
ND
0.01
TR1156 Page 3 of 4 June 2024

TABLE ATT1-13
TABLE 3+ PFAS MASS DISCHARGE BY PATHWAY DOWNGRADIENT OF REMEDIES (AFTER REMEDIES)
Chemours Fayetteville Works, North Carolina
Pathway Number'
9
Sum of All Pathways
Pathway Name
Georgia Branch Creek
Flow MG
12
Program
CAP SW Sampling 1 Q24
Location ID
GBC-5
Field Sample ID
CAP1Q24-GBC-5-012424
Sample Date and Time2
01/24/24
Sample Deliver Group SDG
320-109128-1
Lab Sample ID
320-109128-1
Sample Type
Grab
Table 3+ Lab SOP Mass Discharge 6 (mg/s)
HFPO-DA
0.19
0.25
PFMOAA
0.04
0.27
PF02HxA
0.18
0.27
PF030A
0.02
0.04
PF04DA
9.4E-03
0.01
PF05DA
1.3E-03
1.5E-03
PMPA
0.25
1.27
PEPA
0.08
0.10
PS Acid
ND
ND
Hydro -PS Acid
0.01
0.02
R-PSDA
0.04
0.06
Hydrolyzed PSDA
ND
0.04
R-PSDCA
ND
ND
NVHOS, Acid Form
1.9E-03
6.0E-03
EVE Acid
ND
ND
Hydro -EVE Acid
ND
1.0E-03
R-EVE
0.01
0.02
PES
ND
ND
PFECA B
ND
ND
PFECA-G
ND
ND
PFPrA
0.29
ND
Total Attachment C Mass Dischar e7,8
0.79
1.28
Total Table 3+ Mass Discharge 17 com ounds 7,9
0.79
1.32
Total Table 3+ Mass Discharge (18 com ounds)7,10
1.05
7.55
Total Table 3+ Mass Discharge 21 Com ounds 7
1.10
7.67
Geosyntec Consultants of NC, P.C.
Notes:
1 - Pathway 3 (Aerial Deposition on Water Features) and Pathway 8 (Offsite Adjacent and
Downstream Groundwater) are not included in this table. Loading from Pathway 3 was
estimated using relative concentration ratios from offsite wells, and loading from Pathway
8 was estimated by scaling to the upstream offsite groundwater loading. Further details are
provided in Attachment 2 and Cape Fear River PFAS Mass Loading Calculation Protocol
Version 2 (Geosyntec, 2020a).
2 - For composite samples, the end of the composite sample time period is listed as the
sample date.
3 - Total Table 3+ concentrations at the Intake River Water at the Facility are subtracted
from Outfall 002 concentrations to compute the mass discharge at Outfall 002.
4 - The stormwater treatment system treats PFAS originating from Stormwater in the
Monomers/IXM area that would otherwise flow to Outfall 002 during storm events. When
stormwater is being treated by the stormwater treatment system, HFPO-DA, PFMOAA,
and PMPA concentrations are measured in the stormwater treatment system influent and
effluent flows. The concentrations and mass loads reported here are the sum of these 3
compounds in the stormwater treatment system influent flow.
5 - Due to transient conditions as a result of the groundwater remedy installation and
commissioning, gradient measurements are impacted from these activities and should be
considered estimates.
6 - Mass discharge by analyte is calculated based on Table 3+ concentrations in Tables A5
and A6, and flow volumes reported in Table A2.
7 - Total PFAS mass discharge is based on the summed Total PFAS concentrations
reported in Table A5 and Table A6, which are rounded to two significant figures.
8 - Total Attachment C does not include Perfluoroheptanoic acid (PFHpA).
9 - Total Table 3+ (17 compounds) does not include Perfluoroheptanoic acid (PFHpA), R-
PSDA, Hydrolyzed PSDA, R-EVE, and PFPrA.
10 - Total Table 3+ (17 compounds) does not include Perfluoroheptanoic acid (PFHpA), R-
PSDA, Hydrolyzed PSDA, and R-EVE.
Bold - Analyte detected above associated reporting limit
SOP - Standard Operating Procedure
MG - million gallons ; mg/s - milligrams per second
ND - Analyte not detected above associated reporting limit.
TR1156 Page 4 of 4 June 2024

Geosyntec
Appendix A: Cape Fear River PFAS Mass Loading Model consultants
Geosyntec Consultants of NC, P.C.
NC License No.: C-3500 and C-295
Attachment ATT2
Direct Aerial Deposition on Cape Fear River
TR 1 156 -Cape Fear River PEAS Mass Loading Assessment First Quarter 2024 Report 16 .Julie 2024

Geosynteco
Attachment ATT2: Supporting Calculations — Direct Aerial consultants
Deposition on Cape Fear River
Geosyntec Consultants of NC, P.C.
NC License No.: C-3500 and C-295
Introduction and Objective
Nine pathways (Table Al of Appendix A) were identified as potentially contributing to observed
Cape Fear River per- and polyfluoroalkyl substances (PFAS) concentrations. These pathways
include direct PFAS aerial deposition to the Cape Fear River. This pathway was identified as
Transport Pathway Number 3 in the PFAS mass loading model. The mass discharge (mass per unit
time measured in milligrams per second [mg/s]) from direct aerial deposition of PFAS to the Cape
Fear River was estimated by scaling air deposition modeling results for Hexafluoropropylene
oxide dimer acid (HFPO-DA; ERM, 2018). The objective of the supporting calculations presented
in this appendix is to estimate aerially deposited PFAS directly on the Cape Fear River during a
mass loading event.
Approach
HFPO-DA mass loading directly to the Cape Fear River was estimated using the reported aerial
extent and deposition contours modeled for October 2018 (ERM, 2018). As depicted in
Table ATT2-1, the HFPO-DA air loading data (micrograms per meters squared [µg/m2]) provided
from ERM (2018) was used to calculate the net hourly deposition rate (nanograms per meters
squared per hour [ng/m2/hr]) using the Equation 1 below:
Equation 1: Net Hourly Deposition Rate
M
DRNET LAIR
tA1R
where,
DRNET = Net hourly deposition rate with units of mass per area per time (M L-2 V), typically
in ng/m2/hr;
MLAiR = Air mass loading of HFPO-DA with units of mass per area (M L-2), typically µg/m2;
and
tAIR = Time that air mass loading was modeled (T), typically hours.
Depositional area along the river was calculated using available data for river width and computed
river lengths where deposition contours were modeled. Eighteen sections (Figure ATT 2-1)
provided from FEMA (2007) were selected along the Cape Fear River to measure the average river
width (m). As depicted in Figures ATT2-2 through ATT2-6, sections along the Cape Fear River
with HFPO-DA concentrations contours ranging from 40 to 640 µg/m2 were selected, and the
length of the Cape Fear River along each of the sections was measured. The average river width
calculated in Table ATT2-2 and section lengths from Figures ATT2-2 through ATT2-6 were used
to calculate section areas (m2) as described in Equation 2 below:
TRI156- Cape Fear River HAS Mass Loading Assessment - First Quarter 2024 Report 1 June 2024

Geosynteco
Attachment ATT2: Supporting Calculations — Direct Aerial consultants
Deposition on Cape Fear River
Geosyntec Consultants of NC, P.C.
NC License No.: C-3500 and C-295
Equation 2: Cape Fear River Surface Area for Each Section
AS=LSxWS
where,
As = Total spatial area over which deposition occurs between contours (L2) in section "s",
typically in m2;
s = Section along the Cape Fear River with HFPO-DA concentrations contours ranging from
40 to 640 µg/m2 (five sections in total);
L = Total length of river within section "s ", typically in m; and
Ws = Average river width in section "s", typically in m.
Start and end deposition rates (ng/m2/hr) for each section along the Cape Fear River will be
estimated based on the deposition contours and corresponding net hourly deposition rate (Table
ATT2-1); a combined deposition rate for each section will be calculated as the average of the start
and end deposition rates. River velocity (meters per hour [m/hr]) will be estimated from measured
flow rates from USGS (2024) and the calculated river cross sectional area. Section lengths will be
used to calculate HFPO-DA travel time based on the river velocities in Table ATT2-3. The
combined deposition rate (ng/m2/hr) from Table ATT2-1, section area (m2), and travel time (hr)
will be used to calculate mass HFPO-DA deposited (ng) as follows in Equation 3 below.
Equation 3: Total HFPO-DA Mass Discharge to Cape Fear River
s
MDHFPO—DA - Y, DRAVG,s X AS X is
s=1
where,
MDHFPo_DA = total mass discharge of HFPO-DA into the river across all sections, with units
of mass per time (M T-1), typically mg/s;
s = section along the Cape Fear River with HFPO-DA concentrations contours ranging from
40 to 640 µg/m2;
S = total number of sections along the Cape Fear River with HFPO-DA concentrations contours
ranging from 40 to 640 µg/m2, five in total;
DRAVG'I = average deposition rate based from the ERM model (2018) in section "s", typically
in ng/m2/hr;
AS = spatial area over which deposition occurs in section "s", typically in m2; and
is = travel time through the river length in section "s", typically in hr.
As reported in the Corrective Action Plan (Geosyntec, 2019), ten offsite groundwater seeps south
of Outfall 003 (Seeps E to M) were identified on the west bank of the Cape Fear River south of
TRI156- Cape Fear River HAS Mass Loading Assessment - First Quarter 2024 Report 2 June 2024

Geosynteco
Attachment ATT2: Supporting Calculations — Direct Aerial consultants
Deposition on Cape Fear River
Geosyntec Consultants of NC, P.C.
NC License No.: C-3500 and C-295
the Site. Seeps E to M were sampled in October 2019 and Seeps E to K were sampled in March
2020 and analyzed for PFAS. The results of both sampling events indicate that Seeps E to M show
an aerial deposition PFAS signature (concentrations decrease in seeps more distant from the Site).
Accordingly, the offsite seep data were used to build a relationship between HFPO-DA and other
PFAS compounds (Figure ATT 2-7). A scaling factor (Table ATT2-4) was used to estimate mass
discharge of Total PFAS compounds to the Cape Fear River as shown in Equation 4. Table ATT2-
5 shows the estimated mass discharges of HFPO-DA and Total PFAS compounds to the Cape Fear
River.
Equation 4: Total PFAS Mass Discharge to Cape Fear River
MDPFAS — MDHFPO—DA X R
where,
MDPFAS = total mass discharge of PFAS compounds into the river, typically in mg/s;
MDHFPo_DA = total mass discharge of HFPO-DA into the river, typically in mg/s; and
R = average ratio of measured HFPO-DA to PFAS compounds across the nine offsite seeps.
References
ERM, 2018. Modeling Report: HFPO-DA Atmospheric Deposition and Screening Groundwater
Effects. 27 April 2018.
Federal Emergency Management Agency (FEMA), 2007. "A Report of Flood Hazards in Bladen
County, North Carolina and Incorporated Areas." (2007) Flood Insurance Study, Federal
Emergency Management Agency. North Carolina Flood Risk Information System
Engineering Model. Cape Fear River ADJ. HEC-RAS 5.0.7.
Geosyntec, 2019. Corrective Action Plan. Chemours Fayetteville Works. December 31, 2019.
USGS, 2024. USGS 02105500 Cape Fear River at Wilm O Huske Lock near Tarheel, NC.
Available at: https://waterdata.usgs.gov/nwis/uv?site—no=02105500
TRI156- Cape Fear River PFAS Mass Loading Assessment - First Quarter 2024 Report 3 June 2024

TABLE ATT2-1 Geosyntec Consultants NC, P.C.
NET HOURLY HFPO-DA DEPOSITION RATE
Chemours Fayetteville Works, North Carolina
Air Loading
(µg/m2)
Air Loading
(ng/m2)
Time (year)
Time (hour)
Net Hourly
Deposition Rate
(ng/m /hr)
40
40,000
1
8,760
4.6
80
80,000
1
8,760
9.1
160
160,000
1
8,760
18.3
320
320,000
1
8,760
36.5
640
640,000
1
8,760
73.1
Notes:
1. HFPO-DA model values are from ERM (2018). Modeling Report: HFPO-DA Atmospheric Deposition
and Screening Groundwater Effects. 27 April 2018.
2. Air deposition contours are shown in Figures ATT2 through ATT6.
3. Net hourly deposition rates are used in the mass discharge calculations, Table ATT2-5.
Abbreviations:
µg/m2: micrograms per meter square.
ng /L: nanograms per liter.
ng/m2/hr: nanograms per meter square per hour.
TR1156 Page 1 of 1 June 2024

TABLE ATT2-2 Geosyntec Consultants of NC, P.C.
ESTIMATION OF CAPE FEAR RIVER AVERAGE WIDTH
Chemours Fayetteville Works, North Carolina
Cross section ID
HEC-RAS Model
Easting (ft)
Northing (ft)
Cape Fear River Width at
Point ID **
Cross Section (m)
0
2,052,368
399,949
1
2,052,366
399,949
2
2,052,334
399,946
619506
3
2,052,254
399,938
84
4
2,052,155
399,928
5
2,052,095
399,922
6
2,052,093
399,922
18
2,053,460
394,655
19
2,053,436
394,649
20
2,053,281
394,613
21
2,053,277
394,612
614224
22
2,053,180
394,590
163
23
2,053,079
394,566
24
2,052,977
394,543
25
2,052,949
394,536
26
2,052,924
394,531
7
2,053,113
396,901
8
2,053,070
396,895
9
2,052,990
396,886
616535
91
10
2,052,891
396,874
11
2,052,831
396,867
12
2,052,815
396,865
21
2,053,373
393,937
22
2,053,349
393,931
23
2,053,271
393,913
613542
89
24
2,053,174
393,891
25
2,053,115
393,877
26
2,053,081
393,869
13
2,053,209
394,897
14
2,053,130
394,878
614517
15
2,053,032
394,854
76***
16
2,052,974
394,840
17
2,052,961
394,837
31
2,053,769
390,652
32
2,053,729
390,645
610240
33
2,053,643
390,630
60***
34
2,053,602
390,623
35
2,053,572
390,618
27
2,053,560
392,482
28
2,053,430
392,455
612082
72
29
2,053,370
392,443
30
2,053,322
392,433
1271
2,054,059
387,249
1272
2,054,022
387,215
1273
2,053,995
387,190
1274
2,053,946
387,145
606667
101
1275
2,053,861
387,067
1276
2,053,812
387,023
1277
2,053,801
387,012
1278
2,053,727
386,945
1193
2,053,950
388,876
1194
2,053,902
388,874
1195
2,053,843
388,871
608468
1196
2,053,717
388,866
107
1197
2,053,659
388,864
1198
2,053,650
388,863
1199
2,053,600
388,861
1271
2,054,059
387,249
1272
2,054,022
387,215
1273
2,053,995
387,190
1274
2,053,946
387,145
606667
101
1275
2,053,861
387,067
1276
2,053,812
387,023
1277
2,053,801
387,012
1278
2,053,727
386,945
TR1156 Page 1 of June 2024

TABLE ATT2-2 Geosyntec Consultants of NC, P.C.
ESTIMATION OF CAPE FEAR RIVER AVERAGE WIDTH
Chemours Fayetteville Works, North Carolina
HEC-RAS Model
Cape Fear River Width at
Cross section ID
Point ID **
Easting (ft)
Northing (ft)
Cross Section (m)
1498
2,057,643
382,269
1499
2,057,610
382,246
1500
2,057,556
382,208
600052
1501
2,057,461
382,141
87
1502
2,057,408
382,103
1503
2,057,398
382,096
1504
2,057,358
382,067
1331
2,055,879
386,154
1332
2,055,812
386,120
1333
2,055,753
386,090
604474
95
1334
2,055,647
386,037
1335
2,055,588
386,007
1336
2,055,566
385,996
1565
2,058,901
380,593
1566
2,058,830
380,549
1567
2,058,774
380,515
597968
116
1568
2,058,675
380,453
1569
2,058,619
380,418
1570
2,058,518
380,356
1406
2,056,453
383,857
1407
2,056,356
383,798
1408
2,056,301
383,763
602061
104
1409
2,056,202
383,702
1410
2,056,146
383,667
1411
2,056,113
383,647
1717
2,060,560
377,186
1718
2,060,482
377,157
1719
2,060,421
377,134
594185
100
1720
2,060,312
377,094
1721
2,060,250
377,071
1722
2,060,232
377,065
1644
2,059,549
379,003
1645
2,059,534
378,996
1646
2,059,474
378,970
596259
84
1647
2,059,368
378,923
1648
2,059,308
378,896
1649
2,059,275
378,881
2042
2,061,270
371,304
2043
2,061,246
371,290
2044
2,061,179
371,252
587968
93
2045
2,061,092
371,203
2046
2,061,042
371,174
2047
2,060,966
371,131
1825
2,060,295
374,663
1826
2,060,270
374,661
1827
2,060,201
374,658
591595
91
1828
2,060,079
374,653
1829
2,060,010
374,650
1830
2,059,995
374,649
1931
2,060,424
373,459
1932
2,060,378
373,442
1933
2,060,372
373,439
590322
1934
2,060,311
373,416
100
1935
2,060,202
373,376
1936
2,060,140
373,353
1937
2,060,097
373,336
Average River Cross Section Width (m) =
99
Notes:
*Cross sections locations are shown in Figure ATT2-1.
**Model point ID: are locations with northing, easting, and river depths provided in the HEC-RAS model.
1 - Data provided from: "A Report of Flood Hazards in Bladen County, North Carolina and Incorporated Areas." RiverADJ. HEC-RAS 5.0.7.
(2007) Flood Insurance Study, Federal Emergency Management Agency. North Carolina Flood Risk Information System Engineering Model.
Cape Fear RiverADJ. HEC-RAS 5.0.7.
2 - The horizontal datum is North American Datum 1983 projected into North Carolina East State Plane (3200).
3 - The vertical datum is North American Datum 1988 projected into North Carolina East State Plane (3200).
Abbreviations:
ft: feet
m: meter
TR1156 Page 2 of June 2024

Geosyntec Consultants of NC, P.C.
TABLE ATT2-3
SUMMARY OF FLOW IN CAPE FEAR RIVER AT WILM O'HUSKE LOCK NR TARHEEL, NC
Chemours Fayetteville Works, North Carolina
USGS Reported
Average
USGS Reported
USGS Reported Total
USGS Reported
Measured
Estimated
Calculated Total
Calculated
Date
1
Average Gage
12
Average
River Width
River Depth
3
Z Value
Cross Sectional
River
Discharge
Height' (ft)
Precipitation ' (inches)
Discharge (L/s)
(ft)
(ft)
Area (ft)
Velocity (ft/s)
(cfs)
1/24/20241
10860.63
5.79
0
307,539
323
22
2
6,217
1.7
1/25/20241
9137.81
5.19
0
258,754
323
22
2
6,076
1.5
Average River Velocity: 1.6
Notes:
1 - Measurements are recorded from the USGS flow gauging station at the W.O. Huske Dam, ID 02105500 (USGS, 2023).
2 - The minimum value recorded by a USGS raingage is 0.01 inches. Anything detected below this threshold is recorded as 0 inches.
3 - Z value is an estimated factor used to compute total cross sectional area from river depth.
cfs: cubic feet per second
ft: feet
ft 2 : feet squared
ft/s: feet per second
L/s: Liter per second
USGS - United States Geological Survey
TR1156 Page 1 of 1 June 2024

TABLE ATT24 Geosyntec Consultants of NC, P.C.
RATIO OF OTHER PFAS COMPOUNDS TO HFPO-DA
Chemours Fayetteville Works, North Carolina
Location ID
SEEP-E
SEEP-E
SEEP-F
SEEP-F
SEEP-G
SEEP-G
SEEP-H
Field Sample ID
SEEP-E-0930
Seep E-030420
SEEP-F-0923
Seep F-030420
SEEP-G-0911
Seep G-030420
SEEP-11-0905
Sample Date
10/22/2019
3/4/2020
10/22/2019
3/4/2020
10/22/2019
3/4/2020
10/22/2019
QA/QC
--
--
--
--
--
Sample Delivery Group (SDG)
320-55576-1
2091227
320-55576-1
2091227
320-55576-1
2091227
320-55576-1
Lab Sample ID
320-55576-1
1274949
320-55576-2
1274953
320-55576-3
1274957
320-55576-4
Table 3+ SOP (ng/L)
HFPO-DA
1,200
950
1,100
1,100
700
730
550
PFMOAA
480 J
390
900
730
190
220
140
PF02HxA
800
470
810
640
470
410
350
PF030A
170
83
130
110
57
56
28
PF04DA
83
17
7.3
9.1
9
7.9
<2
PF05DA
46
<2
<2
<2
<2
<2
<2
PMPA
2,300
1,800
2,800
2,100
1,500
1,500
1,200
PEPA
710
600
870
710
490
520
360
PS Acid
<2
<2
<2
<2
<2
<2
<2
Hydro -PS Acid
90
24
9.6
10
22
11
16
R-PSDA
220 J
53 J
92
68 J
79 J
44 J
39 J
Hydrolyzed PSDA
2.1 J
<2
<2.9
<2
<2
<2
<2
R-PSDCA
<2
<2
<2
<2
<2
<2
<2
NVHOS
15
6
12
8
5.4
5
4.3
EVE Acid
<2
<2
<2
<2
<2
<2
<2
Hydro -EVE Acid
7.7
2.3
2
<2
<2
<2
<2
R-EVE
76
20
60
40
39
28
21 J
PES
<2
<2
<2.3
<2
<2
<2
<2
PFECA B
<2
<2
<3
<2
<2
<2
<2
PFECA-G
<2
<2
<2
<2
<2
<2
<2
Total Attachment C (ng/L)1'Z
5,900
4,300
6,600
5,400
3,400
3,500
2,600
Total Table 3+ (17 compounds) (ng/L)2,3
5,900
4,300
6,600
5,400
3,400
3,500
2,600
Ratio of Total Attachment C to HFPO-DA
4.9
4.5
6.0
4.9
4.9
4.8
4.7
Ratio of Total Table 3+ (17 compounds) to HFPO-DA
4.9
4.5
6.0
4.9
4.9
4.8
4.7
Average Ratio of Total Attachment C to HFPO-DA
4.85
Average Ratio of Total Table 3+ (17 compounds) to HFPO-DA
4.87
TR1156 Page 1 of 3 June 2024

TABLE ATT24 Geosyntec Consultants of NC, P.C.
RATIO OF OTHER PFAS COMPOUNDS TO HFPO-DA
Chemours Fayetteville Works, North Carolina
Location ID
SEEP-H
SEEP -I
SEEP -I
SEEP-J
SEEP-J
SEEP-K
SEEP-K
Field Sample ID
Seep H-030420
SEEP-I-0856
Seep I-030420
SEEP-J-0843
Seep J-030420
SEEP-K-0835
Seep K-030420
Sample Date
3/4/2020
10/22/2019
3/4/2020
10/22/2019
3/4/2020
10/22/2019
3/4/2020
QA/QC
--
--
--
--
--
Sample Delivery Group (SDG)
2091227
320-55576-1
2091227
320-55576-1
2091227
320-55576-1
2091227
Lab Sample ID
1274961
320-55576-5
1274965
320-55576-6
1274969
320-55576-7
1274973
Table 3+ SOP (ng/L)
HFPO-DA
540
570
470
580
250
640
490
PFMOAA
180
130
200
180 J
140
160
210
PF02HxA
330
300
280
350 J
130
320
230
PF030A
30
17
18
120 J
16
41
28
PF04DA
<2
<2
<2
58
4.7
11
5
PF05DA
<2
<2
<2
20 J
2.2
4.8
<2
PMPA
1,100
1,200
1,100
810 J
660
1,300
1,000
PEPA
360
390
390
260
200
400
350
PS Acid
<2
<2
<2
<2
<2
<2
<2
Hydro -PS Acid
9.3
12
12
37
6.9
70
16
R-PSDA
30 J
53 J
36
110 J
23
130 J
49
Hydrolyzed PSDA
<2
<2
<2
<2
<2
<2
<2
R-PSDCA
<2
<2
<2
<2
<2
<2
<2
NVHOS
3.7
4.4
4.5
8.1 J
2.8
5.2
4.7
EVE Acid
<2
<2
<2
<2
<2
<2
<2
Hydro -EVE Acid
<2
<2
<2
2.7
<2
3.5
<2
R-EVE
20
23 J
17
16
13
46 J
25
PES
<2
<2
<2
<2
<2
<2
<2
PFECA B
<2
<2
<2
<2
<2
<2
<2
PFECA-G
<2
<2
<2
<2
<2
<2
<2
Total Attachment C (ng/L)1'Z
2,500
2,600
2,500
2,400
1,400
2,900
2,300
Total Table 3+ (17 compounds) (ng/L)2,3
2,600
2,600
2,500
2,400
1,400
3,000
2,300
Ratio of Total Attachment C to HFPO-DA
4.6
4.6
5.3
4.1
5.6
4.5
4.7
Ratio of Total Table 3+ (17 compounds) to HFPO-DA
4.8
4.6
5.3
4.1
5.6
4.7
4.7
Average Ratio of Total Attachment C to HFPO-DA
4.85
Average Ratio of Total Table 3+ (17 compounds) to HFPO-DA
4.87
TR1156 Page 2 of 3 June 2024

TABLE ATT24 Geosyntec Consultants of NC, P.C.
RATIO OF OTHER PFAS COMPOUNDS TO HFPO-DA
Chemours Fayetteville Works, North Carolina
Location ID
SEEP-L
SEEP-M
Field Sample ID
SEEP-L-0825
SEEP-M-0818
Sample Date
10/22/2019
10/22/2019
QA/QC
--
--
Sample Delivery Group (SDG)
320-55576-1
320-55576-1
Lab Sample ID
320-55576-8
320-55576-9
Table 3+ SOP (ng/L)
HFPO-DA
520
570
PFMOAA
130
100
PF02HxA
220
190
PF030A
18
15
PF04DA
2.7
<2
PF05DA
<2
<2
PMPA
1,200
1,300
PEPA
350
410
PS Acid
<2
<2
Hydro -PS Acid
44
28
R-PSDA
120 J
78 J
Hydrolyzed PSDA
<2
<2
R-PSDCA
<2
<2
NVHOS
5.9
5.6
EVE Acid
<2
<2
Hydro -EVE Acid
<2
<2
R-EVE
44 J
26 J
PES
<2
<2
PFECA B
<2
<2
PFECA-G
<2
<2
Total Attachment C (ng/L)1,2
2,500
2,600
Total Table 3+ (17 compounds) (ng/L)2,3
2,500
2,600
Ratio of Total Attachment C to HFPO-DA
4.8
4.6
Ratio of Total Table 3+ (17 compounds) to HFPO-DA
4.8
4.6
Average Ratio of Total Attachment C to HFPO-DA
4.85
Average Ratio of Total Table 3+ (17 compounds) to HFPO-DA
4.87
Notes:
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.
1 - Total Attachment C does not include Perfluoroheptanoic acid (PFHpA).
2 - Total Table 3+ and Total Attachment C were calculated including J qualified
data but not non -detect data. The sum is rounded to two significant figures.
3 - Total Table 3+ (17 compounds) does not include PFHpA, R-PSDA,
Hydrolyzed PSDA, R-EVE, and PFPrA.
TR1156 Page 3 of 3 June 2024

TABLE ATT2-5
CALCULATION OF HFPO-DA DEPOSITED MASS AND MASS FLUX
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants NC, P.C.
Section'
Start Air Loading
Z
(ug/m)
End Air
Loading
(ug/mZ)
Start Deposition
2 z
Rate (ng/m /hr)
End Deposition Rate
z 2
(ng/m /hr)
Average Deposition
Rate
(ng/m2/hr)
Section
3
Distance
(m)
Average River
Width (m)
Section Area
z
(m)
4
River Velocity
(ft/s)
River
Velocity
(m/hr)
Travel Time
(hrs)
Mass
Deposited
(mg)
Mass Discharge
(mg/s)
Center
160
160
18.3
18.3
18.3
903
98.59
89,028
1.6
1783.64
0.51
0.8
0.00045
Up River Section 1
160
80
18.3
9.1
13.7
490
98.59
48,300
1.6
1783.64
0.27
0.2
0.00018
Up River Section 2
80
40
9.1
4.6
6.8
909
98.59
89,570
1.6
1783.64
0.51
0.3
0.00017
Down River Section 1
160
80
18.3
9.1
13.7
586
98.59
57,813
1.6
1783.64
0.33
0.3
0.00022
Down River Section 2
80
40
9.1
4.6
6.8
565
98.59
55,672
1.6
1783.64
0.32
0.1
0.00011
Total HFPO-DA: 0.0011
Total Attachment C 5 : 0.01
Total Table 3+ (17 Compounds)6: 0.006
Notes:
1 - River cross sections are shown in Figure ATT2-1.
2 - Based on model deposition rate, Table ATT2-1.
3 - Section distances are measured in GIS as shown on Figures ATT2-2 through ATT2-6.
4 - River velocity is calculated as an average from USGS discharge data between January 24 and January 25, 2024, Table ATT2-3
5 - Total Attachment C does not include Perfluoroheptanoic acid (PFHpA).
6 - Total Table 3+ (17 compounds) does not include PFHpA, R-PSDA, Hydrolyzed PSDA, R-EVE, and PFPrA.
µg/m2/yr: micrograms per meter square per year
ft/s: feet per second
hr: hours
m/hr: meters per hour
m: meter
m 2 : meter square
mg/s: milligrams per second
mg: milligrams
ng/m2/hr: nanograms per meter square per hour
TR1156 Page 1 of 1 June 2024

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616535
614517
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608468
P x
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J
5
s
5
-
591595
•{
5
.
1 0.5 0
1 Miles
Legend
Cross Section
Cape Fear River Cross Sections Locations
Notes:
1. Cape Fear River cross section locations obtained from "A Report of Flood
Chemours Fayetteville Works, North Carolina
Hazards in Bladen County, North Carolina and Incorporated Areas." (2007)
Flood Insurance Study, Federal Emergency Management Agency. North
Carolina Flood Risk Information System Engineering Model. Cape Fear FFpp (�
GeoSynteC
RiverADJ. HEC-RAS5.0.7.
2. Cross sections used for calculation of average river widths for
Geosyntec Consultants ofNC, P.C.
NC License No.: C-3soo and C-295
consultants
Figure
calculation of aerial mass loading.
3. Basemap source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics,
ATT2-1
CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS
User Community
Raleigh June 2024
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Length (m): 903.00
�s
f / O T• r
AL
r �
Legend Notes: 1 0.5 0 1 Miles
tlg / m2/ yr - micrograms per square meter per year
Site Boundary
HFPO-DA deposition model contours for October 2018 from
Modeled Deposition Contours, October 2018 Scenario ERM, 2018, Modeling Report: HFPO-DA Atmospheric Deposition
40 pg/m2/yr and Screening Groundwater Effects. 27 April 2018. Measurement Of Cape Fear River Length
at Down -River Section 2
80 pg/m2/yr Basemap source: Esri, DigitalGlobe, GeoEye, Earthstar Chemours Fayetteville Works, North Carolina
Geographics, CNES/Airbus IDS, USDA, USGS, AeroGRID, IGN,
160 pg/m2/yr and the GIS User Community
320 pg/m2/yr Geosynte& CeosyntecConsultants ofNC, P.C. Figure
NC License No.: C-3500 and C-295
640 tlg/m2/yr consultants
ATT2-2
Raleigh June 2024
roiechon: 1 3 fate ane ort aro ina 3 eet nits in oot

ngth
•1:
.05
-
i � �, rr� •
Legend
Notes:
tlg / m2/ yr - micrograms per square meter per year
Site Boundary
Modeled Deposition Contours, October 2018 Scenario
HFPO-DA deposition model contours for October 2018 from
ERM, 2018, Modeling Report: HFPO-DA Atmospheric Deposition
40 pg/m2/yr
and Screening Groundwater Effects. 27 April 2018.
80 pg/m2/yr
Basemap source: Esri, DigitalGlobe, GeoEye, Earthstar
160 pg/m2/yr
Geographics, CNES/Airbus IDS, USDA, USGS, AeroGRID, IGN,
and the GIS User Community
320 pg/m2/yr
640 pg/m2/yr
1' II
1 0.5 0 1 Miles
Measurement of Cape Fear River Length
at Up -River Section 2
Chemours Fayetteville Works, North Carolina
Ge o syn to & Geosyntec Consultants of NC, P.C. Figure
consultants NC License No.: C-3500 and C-295
ATT2-4
Raleigh June 2024

;9A O
IAi-
�0&'
Length (m): 586.39
Legend
Notes:
tlg / m2/ yr - micrograms per square meter per year
Site Boundary
Modeled Deposition Contours, October 2018 Scenario
HFPO-DA deposition model contours for October 2018 from
ERM, 2018, Modeling Report: HFPO-DA Atmospheric Deposition
40 pg/m2/yr
and Screening Groundwater Effects. 27 April 2018.
80 pg/m2/yr
Basemap source: Esri, DigitalGlobe, GeoEye, Earthstar
160 pg/m2/yr
Geographics, CNES/Airbus IDS, USDA, USGS, AeroGRID, IGN,
and the GIS User Community
320 pg/m2/yr
640 pg/m2/yr
W — -,e-m*
1 0.5 0 1 Miles
Measurement of Cape Fear River Length
at Down -River Section 1
Chemours Fayetteville Works, North Carolina
Ge o syn to & Geosyntec Consultants of NC, P.C. Figure
consultants NC License No.: C-3500 and C-295
ATT2-5
Raleigh June 2024

•� `fir t' , ,w V����,�' � �� F .� � �,
Ott
Legend
Notes:
tlg / m2/ yr - micrograms per square meter per year
Site Boundary
Modeled Deposition Contours, October 2018 Scenario
HFPO-DA deposition model contours for October 2018 from
ERM, 2018, Modeling Report: HFPO-DA Atmospheric Deposition
40 pg/m2/yr
and Screening Groundwater Effects. 27 April 2018.
80 pg/m2/yr
Basemap source: Esri, DigitalGlobe, GeoEye, Earthstar
160 pg/m2/yr
Geographics, CNES/Airbus IDS, USDA, USGS, AeroGRID, IGN,
and the GIS User Community
320 pg/m2/yr
640 pg/m2/yr
W& I ^fq -k -11�- -
1 0.5 0 1 Miles
Measurement of Cape Fear River Length
at Down -River Section 2
Chemours Fayetteville Works, North Carolina
Ge o syn to & Geosyntec Consultants of NC, P.C. Figure
consultants NC License No.: C-3500 and C-295
ATT2-6
Raleigh June 2024

Appendix A: Cape Fear River PFAS Mass Loading Model
Geosyntec
consultants
Attachment ATT3
Geosyntec Consultants of NC, P.C.
NC License No.: C-3500 and C-295
Onsite Groundwater Pathway
TR 1 156 -Cape Fear River PEAS Mass Loading Assessment First Quarter 2024 Report 17 .Julie 2024

Geosyntec°
Attachment ATT3: Supporting Calculations — Onsite consultants
Groundwater Pathway
Geosyntec consultants of NC, P.C.
NC License No.: C-3500 and C-295
Introduction and Objective
Based on the conceptual site model, the Black Creek Aquifer and the Flood Plain deposits at the
river bank are the primary hydrogeologic units that are potentially in hydraulic connection with
the Cape Fear River. The Cape Fear River stage is lower than the top of the Black Creek Aquifer,
except during peak rainfall or flooding, indicating that the Cape Fear River is a discharge boundary
for the aquifer. Onsite groundwater from the Black Creek Aquifer discharging to the Cape Fear
River is therefore a potential pathway for per- and polyfluoroalkyl substances (PFAS) mass
loading to the Cape Fear River. This pathway was identified as Transport Pathway Number 5 in
the PFAS mass loading in this report. The objective of the supporting calculations presented in
this appendix is to estimate PFAS mass loading from onsite groundwater discharge based on
calculated PFAS mass flux for segments of the Black Creek Aquifer along the river frontage.
Prior to Q2 2023, hydraulic gradients were derived from potentiometric maps. Since Q2 2023,
hydraulic gradients were estimated between well pairs downgradient of the remedy, since the prior
method is considered not appropriate for these new conditions since barrier wall results in a
discontinuous potentiometric surface. This change will continue to be incorporated in future mass
loading assessments.
Approach
The PFAS mass loading from onsite groundwater discharge was estimated as follows. Supporting
data are provided in Table ATT3-1:
The Cape Fear River frontage was divided into nine segments (Figure ATT3-1). Each
segment includes one well pair, consisting o£
a. One primary groundwater monitoring well that is considered representative of the
Black Creek Aquifer and that is included in the Corrective Action Plan' (Geosyntec,
2019); and
b. One secondary paired groundwater monitoring well that is generally west of the
groundwater monitoring well, east of the Barrier Wall remedy, and also considered
representative of the Black Creek Aquifer.
2. The thickness of the Black Creek Aquifer (h) was estimated for each segment based on
the segment length and the cross -sectional area of the Black Creek Aquifer, as
determined by the three-dimensional hydrostratigraphic model of the Site, constructed
using CTech's Earth Volumetric Studio (EVS) software (Geosyntec, 2019):
' The Black Creek Aquifer is not observed in boreholes from Segment 4 suggesting a localized "pinch -out" of the
Black Creek Aquifer in Segment 4. The monitoring well used to determine HAS mass loading in this segment
is screened in the Floodplain Deposits (LTW-03).
TRI156- Cape Fear River HAS Mass Loading Assessment - First Quarter 2024 Report 1 June 2024

Geosynteco
Attachment ATT3: Supporting Calculations — Onsite consultants
Groundwater Pathway
Geosyntec Consultants of NC, P.C.
NC License No.: C-3500 and C-295
A
h= l
where,
h = the Black Creek Aquifer thickness [ft];
A = the cross -sectional area of the Black Creek Aquifer [ft2]; and
Z = the segment length [ft].
The EVS model output for each segment is presented in Figure ATT3-2.
3. The hydraulic gradient (i) for each segment was derived based on the groundwater
elevations and distance between each well within the well pair (Figure ATT3-3):
—dh
ti= d
where,
i = the hydraulic gradient [ft/ft];
Ah = the head difference between the two wells [ft]; and
d = the distance between the two wells [ft]
Unlike past quarterly reports, only a single hydraulic gradient value was estimated for
each segment (i.e., no lower and upper bound values). Based on the hydrographs from
wells along the river presented in Figure ATT34, hydraulic gradients in the aquifer are
relatively constant over time. With the exception of large changes in the river level
(over 10 feet), these wells respond to river level fluctuation in the subdued manner.
4. The hydraulic conductivity (K) was estimated for each segment using the results of
constant rate tests performed at five extraction wells installed in the Black Creek
Aquifer upstream of the river frontage (Geosyntec, 2021). The extraction wells used to
determine the hydraulic conductivity for each segment are as follows, based on their
locations relative to the segments (Figure ATT 3-1):
TRI156- Cape Fear River HAS Mass Loading Assessment - First Quarter 2024 Report 2 June 2024

Attachment ATT3: Supporting Calculations — Onsite
Groundwater Pathway
Extraction Well
Segment
EW-1
1
2
EW-4
3
4
EW-5
5
6
EW-2
7
EW-3
8
9
Geosynteco
consultants
Geosyntec Consultants of NC, P.C.
NC License No.: C-3500 and C-295
5. The total HAS concentration for each segment was determined based on grab samples
collected from the primary groundwater monitoring wells. HAS analytical results for
these groundwater samples are presented in Table ATT1-15-1 and ATT1-15-2 in
Attachment 1.
6. Mass flux for each segment, representing the PFAS mass loading to the river from
groundwater, was determined as follows:
Q = lhKiCf
where,
Q = the mass flux [mg/sec];
Z = the segment length [ft];
h = the Black Creek Aquifer thickness [ft];
K = the hydraulic conductivity of the aquifer [ft/sec];
i = the hydraulic gradient [ft/ft], using an upper and lower contour elevation
difference;
C = the total PFAS concentration [ng/L]; and
f = the conversion factor between cubic feet and liters and between ng and mg.
The mass flux is interpreted as zero for segments where a negative hydraulic gradient
was computed (i.e., groundwater flow is moving away from the river). Parameters
listed above were used to estimate groundwater flow rates, shown in Table ATT3-2.
Potential Future Methodology Modifications
The groundwater flows in the Black Creek Aquifer have changed due to the implementation of the
groundwater extraction system and the barrier wall construction remedy. Adjustments to this
calculation methodology were made since Q2 2023 and may be required in future assessments
based on changes in conditions or refinement of Site knowledge.
TRI156- Cape Fear River HAS Mass Loading Assessment - First Quarter 2024 Report 3 June 2024

Geosynteco
Attachment ATT3: Supporting Calculations — Onsite consultants
Groundwater Pathway
Geosyntec Consultants of NC, P.C.
NC License No.: C-3500 and C-295
References
Geosyntec, 2019. Corrective Action Plan. Chemours Fayetteville Works. December 2019.
Geosyntec, 2021. Cape Fear River PFAS Mass Loading Assessment — Fourth Quarter 2020 Report,
Chemours Fayetteville Works. March 31, 2021.
TRI156- Cape Fear River HAS Mass Loading Assessment - First Quarter 2024 Report 4 June 2024

TABLE ATT3-1
ONSITE GROUDWATER PATHWAY SUPPORTING DATA
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC P.C.
Total Attachment C
Total Table 3+ (17 Compounds)
Total Table 3+ (18 Compounds)
Total Table 3+ (21 Compounds)
Se went
g
Primary Well
y
Sample Date
p
Segment
Length (ft)
Cross -sectional
Area of Black
�
Creek Aquifer
(ft�)
Average
Thickness of
Black Creek
Aquifer (ft)
Secondary
z
Paired Well
Difference in
Hydraulic
Y
s
Head (ft)
Difference in
Distance (ft)
Hydraulic
Gradient
(ft/ft)
Hydraulic
4
Conductivity
(ft/sec)
Concentration
(ng/L)
s
Mass Loading
(mg/s)
Concentration
(ng/L)
s
Mass Loading
(mg/s)
r
Concentration
(ng/L)
Mass Loading
(mg/s)
Concentration
(ng/L)
s
Mass Loading
(mg/s)
1
PIW-1D
1/22/2024
1,150
13,400
11.7
OW-14
-0.46
305.47
0.0015
1.71E-04
44,000
0.0043
44,000
0.004
55,000
0.0054
56,000
0.0055
2
PIW-31)
1/18/2024
873
11,010
12.6
OW-44
0.22
351.79
0.0000
1.71E-04
97,000
0
98,000
0
120,000
0
120,000
0
3
LTW-02
1/17/2024
875
5,560
6.4
OW-45
-0.13
399.66
0.0003
1.02E-04
97,000
0.0005
97,000
0.0005
120,000
0.0006
120,000
0.0006
4
LTW-03
1/31/2024
729
2,800
3.9
OW-46
-1.55
510.17
0.0030
1.02E-04
140,000
0.0035
140,000
0.003
190,000
0.0047
190,000
0.0047
5
PZ-22
1/16/2024
656
15,200
23.2
OW-22
-0.21
370.47
0.0006
3.28E-04
220,000
0.0177
220,000
0.018
290,000
0.0233
290,000
0.0233
6
PIW-7D
1/15/2024
524
16,000
30.5
OW-48
0.20
331.98
0.0000
3.28E-04
220,000
0
220,000
0
290,000
0
290,000
0
7
LTW-05
1/15/2024
672
11,800
19.4
OW-25
-0.30
398.47
0.0008
1.28E-04
330,000
0.0117
340,000
0.012
j 460,000
0.0164
460,000
0.0164
8
OW-28
1/18/2024
594
15,500
26.0
OW-27
-0.33
216.60
0.0015
2.59E-04
18,000
0.0031
18,000
0.003
24,000
0.0041
25,000
0.0043
9
OW-33
1/30/2024
1607
46,300
28.8
OW-30
0.27
297.99
0.0000
2.59E-04
22,000
0
22,000
0
30,000
0
30,000
0
Total
--
0.0408
--
0.0411
--
0.0545
--
0.0548
Notes
1 - Cross sectional areas were determined using the three-dimensional hydrostratigraphic model of the Site, constructed using CTech's Earth Volumetric Studio (EVS) software (Figure ATT3-2).
2 - Second paired well is east of the Barrier Wall remedy and west of the primary well.
3 - Groundwater elevation difference for hydraulic gradient based on water levels measured on January 31, 2024 (Figure ATT3-3).
4 - Hydraulic conductivity values are based on constant rate pumping test results from extraction wells described in Attachment ATT3.
5 - Attachment C does not include Perfluorohepthanoic acid (PFHpA).
6 - Total Table 3+ (17 compounds) does not include PFHpA, R-PSDA, Hydrolyzed PSDA, R-EVE, and PFPrA.
7 - Total Table 3+ (18 compounds) does not include PFHpA, R-PSDA, Hydrolyzed PSDA, and R-EVE.
8 - Detailed PFAS Concentrations provided in Appendix A.
9 - A value of zero represents a negative mass loading value (i.e., computed negative gradient).
-- not applicable
ft - feet
ft/sec - feet per second
ftz - square feet
mg/s - milligrams per second
ng/L - nanograms per liter
TR1156 Page 1 of 1 June 2024

TABLE ATT3-2 Geosyntee Consultants of NC, P.C.
NOVEMBER 2023 ONSITE GROUNDWATER FLOW RATE
Chemours Fayetteville Works, North Carolina
Segment
Cross -sectional
Area of Black
Creek Aquifer'
(ft)
Hydraulic
i 2
Gradient"
(ft/ft)
Hydraulic
Conductivit y
(ft/sec)
Flow Upper Bound
(ft3/sec)
Flow Upper Bound
(gal /day)
1
13,400
0.0015
1.71E-04
3.44E-03
2,222
2
11,010
0
1.71E-04
0
0
3
5,560
0.0003
1.02E-04
1.84E-04
119
4
2,800
0.0030
1.02E-04
8.75E-04
565
5
15,200
0.0006
3.28E-04
2.83E-03
1,832
6
16,000
0
3.28E-04
0
0
7
11,800
0.0008
1.28E-04
1.13E-03
733
8
15,500
0.0015
2.59E-04
6.10E-03
3,945
9
1 46,300
1 0
1 2.59E-04
0
0
0.016
10,294
Notes
1 - Supporting data for cross -sectional area, hydraulic gradient, and hydraulic conductivity provided in Table ATT3-1.
2 - Hydraulic gradient based on water levels measured on January 31, 2024 (Figure ATT3-3).
ft - feet
ft2 - square feet
ft/sec - feet per second
ft3/sec - cubic feet per second
gal/day - gallons per day
TR1156 Page 1 of 1 June 2024

I0.5 025 0 0.5 Mllas
v
X
�] 'M(Segment 1
u
ment 2
Segment 3 Legend
p _
See A
riooupiam ueposits
Monitoring Well
Segment Line
LTW-03
Black Creek Aquifer
Monitoring Well
North Forcemain
— Segment 4
Well Pair for Gradient
Calculation
South Forcemain
Barrier Wall
See B
__ p
Extraction Well ---
—- Distance Between Wells
/--]Seament 5 — — — Observed Seep
Nearby Tributary
Site Boundary
ment 6
i� Notes:
OW-25 1 PIW-7S 1. Due to the scale of the map, pairs of wells that are in close proximity have been
y_` LTW-05 offset for visibility. Therefore, the placement of these wells on this map do not
See C reflect their true geographic coordinates.
EW_2 p 2. The outline of Cape Fear River is approximate and is based on open data from
® ArcGIS Online and North Carolina Department of Environmental Quality
Segment 7 online GIS.
3. Constant rate tests conducted at extraction wells were used to calculate hydraulic
conductivity for nearby segments as shown in TableATT3-1 and described in
OW-28 the AttachmentATT3.
— SeeD 4. Basemap source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics,
p CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community.
OW-2�7
Segment 8 1,000 500 0 1,000 Feet
EW-,3
AL
� OW-33
0W-30 Black Creek Aquifer Segments
for Groundwater Pathway
Chemours Fayetteville Works, North Carolina
Outfall 003
"',—Segment 9 Geosynteci�
Geosyntec Consultants of NC, P.C. Figure
Lock;and Dam Seep North NC license No.: C-3500 and C 295
Lock,and Dam Seep consultants
ATT3-1
Raleigh June 2024

50
40
20
0
>
w 10
0
-10
0
50
40
0 30
>
Q
z
m 20
0
> 10
>
W
0
-10
0
PIW-1S/D River Pump Station Basin
North South
17
_ ----- - ---- ----------- --- —--------
Segment 1
250 500 750 1,000
Distance Along Transect Line (feet)
50
50
40
w 20
0
m
>
w 10
-10 T
0
250 500
Distance Along Transect Line (feet)
-----------------------------�
Segment 8
250 500
Distance Along Transect Line (feet)
50
40
W
00
j 30
z
9 20
O
w
w 10
J
40
0 30
Q
z
20
0
50
40
00
00
j 30
Q
z
a�
20
0
m
w 10
0
-10'
0
I PIW-3D I LTW-01 1
o South
2, , km
Segment 2
750 1U 0 250 500
Distance Along Transect Line (feet)
250 500 750
Distance Along Transect Line (feet)
50 PIW7S/D 50
North South
50
40
w 20
0
>
w 10
40
-----
40
0 30
��------------
-
00
30
Q
Z
z
20
-----------
-
z
°'
20
oCO
_.....
_....� _..... _.....
c
p
10
---- -----
(D
W
10
W_.....
_..., _..... _.....
0
---------------
0
Segment 6
10 0
250 500
10 0
Distance Along Transect Line (feet)
0 250 500 750 1,000
Distance Along Transect Line (feet)
0
-10
0
250 500 75
Distance Along Transect Line (feet) 0
Legend
IWell screen(1)
Units
E::] Floodplain Deposits
0 Black Creek Confining Unit
= Black Creek Aquifer
M] Upper Cape Fear Confining Unit
1,250 1,500
Notes:
NAVD88 — feet North America Datum of 1988
Vertical Exaggeration = 10x
1. Wells are projected onto the cross-section.
PIW-1s
f
' � Segment 1
OW-1"- PIW-1❑
EW�. ; Segment
OW-4{ {= Plw-3o
�� �LT-W-02
5egment 3
4
+`ow45 Seep A.
E •%'-4'� LTW 03
(Segment 4
^� y Seep B
� 1 Segment 5
rnv-22 . `t`
-^ 1 ELN-5
1+
j OW-48
e' I
OW-27f
EW-3
DN
and Dam .Seep Nc
Lock and Dam
PZ-22
Segment 6
PIW-7❑
5 PIW-7S L7W-05
��Seep C
rSgment 7
r
OW-28
¢±- Seep D
OW-33

M
'A.`'�
:,L� `:
0.5 0.25 0 0.5 Miles
19i
23
E.A
�gment 1
0.0015
SMW-036 r57.41 36.32 Segment 2 Legend
85.38 BCA-01-0.0006 Black Creek Aquifer
79.56 PIW-3D Barrier Wall
Monitoring Well
057 13 36.45 Floodplain Deposits - Nearby Tributary
OW-17 3e ment 3 Monitoring Well
33.22 g Transect Line
Ow-45 0.0003 - - Observed Seep
40.20 Site Boundary
OW-18 - North Forcemain
PW-15R 46.33 CV LTW-02
AWOL69.34 v 40.07
South Forcemain
• Plw-aD Seep A
e{�y�G. ar 4001 PW-10RR G Segment 1� Segment Number
OW-3 39.79 N 0.0015 Hydraulic Gradient (ft/ft)
"r � t 34.69 OW-20 -� LTW-03
�^37.98
�.
t ° -f ry ,� 39.53 0.0030 ft - feet
?'14 OW"19 OVV-52 -53 ft NAVD88 - feet North American Vertical Datum 1988.
_ r 30.57 OW 39.05 Seep B
1 OW-21 39 48 1. Depth to water measurements were collected on January 31, 2024, and are
I� 81 26 31.45 OW 22 PZ-22 provided in the Geosyntec, 2024. CFR Long -Term Remedy Performance
OW-47 39 61 39.40 Monitoring Report #5. Chemours Fayetteville Works. June 30, 2024. Wells
OW-8 39.39 Segment 5 screened within the Black Creek Aquifer that were not measured on this day are
R. 30.25 _ 0.0006 not shown.
2. Due to transient conditions as a result of the groundwater remedyinstallation
j PI 8 2 39W6 D and commissioning, potentiometric surfaces are impacted from these activities
OW-23 and should be considered estimates.
?s- 39.38 3. Ground surface elevation contours are derived from Lidar scans performed on
0W-24 Segment 6 December 1, 2019 and December 19, 2019 by Spectral Data Consultants, Inc.
'; , BCA-02 29.63 OWL -0.0006 4. Seep locations identified visually as reported in Geosyntec, 2019. Seeps and
70 28 OW 25 39.26 LTW-05 Creeks Investigation Report. Chemours Fayetteville Works. 26 August 2019.
■`'` 38.76 5. Awell pair was assigned for each segment. The hydraulic gradients were then
iR 39.06 Seep C derived at each segment by calculating the different between groundwater
OW-51 elevation at each well and dividing the remainder by the distance between the two
1 Segment 7 wells. The well pairs for each segment are provided in Table ATT3-1.
OW-49 The outline of Cape Fear River is approximate and is based on open data from
39.04
0.0008 6. ArcGIS Online and North Carolina Department of Environmental Quality Online
- Seep D OW-28 GIs (MajorHydro shapefile).
39.99 7. Basemap source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics,
T F Ow 98 Segment 8 CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIs User Community.
A► ` OW-50 -/
OW-29 40.53 OW`R OW-27 0.0015 1,000 500 0 1,000 Feet
44:44
40r77 40.32
PIW-1 OD R 0W-33
41.53 0W-30 40.42
OW-31 OW-4R 40.15
40:02 40:97 Se ment 9
2.ow-ao ---Segment
g Groundwater Elevation Map and
62..8 8 -32 ao87-0.0009 Hydraulic Gradients - January 2024
3OW .�.
38.49 PW-11 Chemours Fayetteville Works, North Carolina
OW-39 �1.13 t'
ao.89 - � Lock and
�%
Outfall 003 Seen North p Geosyntec Geosyntec Consultants of NC, RG Figure
N - - NC license No.: C-3500 and C-295
.� consultants
A►TT3-3
Raleigh June 2024

70
W
0
00
50
Q
z
40
o_
a-J
M
11�J 30
L
M
20
C
0
rLy
V
M
0
M M M M M O O O C> O O O O O 0 0 0 r-I r-I . -I r-I r-I r-I r-I r-I r-I r-I r-I r-I N N rI%j N N N N N N N N N N m m m m m m m m m m m m
r-I r-I r-I ri r1 N ['V [V N N" N fV N CV N N N iV CV rV N N N CV N f V N N N f V N t V N N N f V N C4 [V N N N CV N N CV N N N fV CV N N
000000000000000000000000000000000000000000000000000000
N N N N N N N N N N N N N N N N N N N N N N N N N N N N N CV N N fV N N N CV N CV [V N N N N N N CV N N N f'V [V N N
tw i1 ;. • 7 U C-0 L L �` C trA CL ;. • 7 U C-0 L L �` C tuD CL a--' > U C-0 L L 7► C W CL 4-1 7 La U A L L L �` _� W CL U> U
Q] Q N CO O i fl 3 U❑ N CO O i ❑ 7 O¢ CI1 ❑❑ Q Q iJ? Z❑ QLn z❑��2Q -1 QLnQz❑—�Ii 4 Ln� ❑
p 3 00 n L. � I.f ] ' N N �{ r-I O Ol O ' w n r- LD � Ln ' fy} N N rl r-iCDt--I r-I N 00 n n LD LO
ri r-I r-I r-I r-I r-I r-I r-I r-I r-I r-I 0 [Y"I fYi m CO N N C'V [ V N N
Date
• LTW-01
• LTW-02
LTW-03
•
LTW-04
• LTW-05
a PIW-1D
PIW-2D
• PIW-3D
• PIW-4D
PIW-6S
• PIW-7D
•
PIW-7S
• PIW-8D
• PW-11
SMW-12
• W.O. Huske Dam
Notes:
ft - feet
NAVD88 - North American Vertical Datum of 1988 NAVD88 - North American Vertical Datum of 1988
70
60,
40
L
30
/'�
aj
20
0
10i�
C

GeosMte&
consultants
Geosyntec Consultants of NC, P.C.
NC License No.: C-3500 and C-295
Appendix B
Supplemental Tables
TR 1156 - Cape Fear River PFAS Mass Loading Assessment— First Quarter 2024 Report 20 June 2024

TABLE Bl-1
OUTFALL 003 CAPTURED MASS LOAD BY COMPOUND AND TIME INTERVAL - Ql 2024
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Interval Details
Calculated Captured Mass Load (lbs)'
A
U
d
A
-It
k
Q�
Q
Q
.b
rn
a
•a
W
W
A
V
Total Flow
Oa.
O
A
cc
O
A
�
O
�
W4
Ua
U
Total Table 3+Duration
ID
Start Time
End Time
(hours)
(MG)
W
�
a
a
W
A
a
a
a
a.
=
a'0a
4
=
4
Z
W
W
xOa
W
vi
W
WW
aInterval
(17 compounds)'
OF003 2024_Q1_1
l/l/24 0:00
1/31/24 23:59
744
13.2
0.46
1.5
0.55
0.16
0.076
0.049
0.28
0.10
0.060
0.020
0.018
0.033
0
0.022
0.0024
0.015
0.0090
0
0
0
3.2
OF003 2024_Q1_2
2/l/24 0:00
2/29/24 23:59
696
10.6
0.36
1.3
0.47
0.13
0.068
0.035
0.25
0.084
0.037
0.022
0.020
0.055
0.00055
0.018
0.0017
0.010
0.0099
0
0
0
2.8
OF003_2024_Q1_3
3/l/24 0:00
3/31/24 23:59
744
13.2
0.41
1.0
0.46
0.12
0.062
0.034
0.25
0.084
0.0069
0.023
0.017
0.051
0.00054
0.017
0
0.010
0.0076
0
0
0
2.5
Total
37.0
1.2
3.7
1.5
0.41
0.21
0.12
0.78
0.27
0.10
0.065
0.055
0.14
0.0011
0.057
0.0041
0.034
0.027
0
0
0
8.5
Notes:
1 - The calculated captured mass load is a product of the concentration difference in the influent and the effluent samples and total flow at the influent for the sampling interval.
2 - Total Table 3+ (17 compounds) does not include PFHpA, R-PSDA, Hydrolyzed PSDA, R-EVE, and PFPrA.
Where mass loads are equal to 0 lbs, the compound was not detected above the reporting limit.
OF003 - previously Old Outfall 002 treatment system
lbs - pounds
MG - million gallons
TR1156 Page 1 of 1 June 2024

TABLE Bl-2 Geosyntec Consultants of NC, P.C.
STORMWATER TREATMENT SYSTEM CAPTURED MASS LOAD
BY COMPOUND AND DATE - Q1 2024
Chemours Fayetteville Works, North Carolina
Date'
Total Flow
(MG)2
Calculated
Captured Mass Load (lbs) 3,4
HFPO-DA
PFMOAA
PMPA
Total of 3
Compounds 5
1/8/24
0.11
0.005
0.0033
0.0006
0.009
1/9/24
0.18
0.009
0.0055
0.0011
0.015
1/10/24
0.17
0.008
0.0044
0.0009
0.014
1/11/24
0.16
0.008
0.0043
0.0009
0.013
1/12/24
0.13
0.006
0.0034
0.0007
0.011
1/13/24
0.21
0.010
0.0055
0.0011
0.017
1/14/20246
0.19
0.009
0.0036
0.0007
0.013
1/15/20246
0.12
0.005
0.0022
0.0004
0.008
2/14/24
0.09
0.007
0.0020
0.0004
0.009
2/15/24
0.14
0.011
0.0032
0.0006
0.015
2/16/24
0.12
0.011
0.0030
0.0005
0.014
2/17/24
0.07
0.006
0.0017
0.0003
0.008
3/2/24
0.13
0.011
0.0066
0.0009
0.019
3/3/24
0.15
0.014
0.0079
0.0011
0.023
3/4/24
0.13
0.012
0.0063
0.0009
0.019
3/5/24
0.08
0.007
0.0038
0.0006
0.011
3/6/24
0.05
0.005
0.0025
0.0004
0.007
3/7/24
0.15
0.009
0.0043
0.0008
0.014
3/8/24
0.15
0.009
0.0043
0.0008
0.014
3/9/24
0.13
0.008
0.0036
0.0007
0.012
3/10/24
0.07
0.004
0.0020
0.0004
0.007
3/27/24
0.07
0.008
0.0021
0.0004
0.010
3/28/24
0.10
0.011
0.0028
0.0006
0.014
3/29/24
0.11
0.012
0.0031
0.0006
0.015
Total
1 3.0
1 0.20
0.091
0.016
0.31
Notes:
1 - Listed dates are days when flow was recorded at the Stormwater Treatment System.
2 - Total daily flows were based on the volume recorded via a totalizer at the Stormwater
Treatment System effluent.
3 - The calculated captured mass load is a product of the concentration difference in the influent
and the effluent samples and total flow at the effluent for the sampling date.
4 - For days where only flow was recorded, the concentrations from the closest date were used to
calculate mass loads.
5 - Only HFPO-DA, PFMOAA and PMPA are recorded at this location. Thus, the total captured
mass load presented here is summed over these three compounds only.
6 - For the sampling event representing treatment on l/14/2024 and 1/15/2024, the reporting limits
at the Stormwater Treatment System effluent for HFPO-DA, PFMOAA, and PMPA were higher
than typical at 81 ng/L, 80 ng/L, and 620 ng/L, respectively. Effluent sample results were non -
detect and it was assumed that all influent mass load was captured.
TR1156 Page 1 of 1 June 2024

TABLE B2
SEEP AND SURFACE WATER OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
CFR-BLADEN
CFR-KINGS
CFR-MILE-76
CFR-TARHEEL
CFR-TARHEEL
GBC-5
Field Sample ID
CAP1Q24-CFR-BLADEN-
012424
CAP1Q24-CFR-KINGS-
012524
CAP1Q24-CFR-RM-76-
012424
CAP1Q24-CFR-TARHEEL
012424
CAP1Q24-CFR-TARHEEL•
24-012524
CAP1Q24-GBC-5-012424
Sample Date
1/24/2024
1/25/2024
1/24/2024
1/24/2024
1/25/2024
1/24/2024
QA/QC
Sample Delivery Group (SDG)
320-109128-1
320-109128-1
320-109128-1
320-109128-1
320-109127-1
320-109128-1
Lab Sample ID
320-109128-5
320-109128-7
320-109128-4
320-109128-6
320-109127-7
320-109128-1
537Mod (ng/L)
10:2 Fluorotelomer sulfonate
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
11 Cl-PF30UdS
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
111,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
<2.0
<2.0
<2.0
<2.0
<2.0
2-(N-ethyl perfluoro-l-octanesulfonamido)-ethanol
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
2-(N-methyl perfluoro-l-octanesulfonamido)-ethanol
<4.0
<4.0
<4.0
<4.0
<4.0
<4.0
6:2 Fluorotelomer sulfonate
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
9C1-PF30NS
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
DONA
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
N-Ethyl Perfluorooctane Sulfonamidoacetic Acid
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
N-ethylperfluoro-l-octanesulfonamide
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
N-methyl perfluoro-l-octanesulfonamide
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
N-Methyl Perfluorooctane Sulfonamidoacetic Acid
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
Perfluorobutane Sulfonic Acid
4.8
4.3
5.6
4.8
5.0
2.8
Perfluorodutanoic Acid
<5.0 UJ
<5.0 UJ
<5.0 UJ
<5.0 UJ
<5.0
<5.0 UJ
Perfluorodecane Sulfonic Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluorodecanoic Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluorododecane Sulfonic Acid (PFDoS)
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluorododecanoic Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluoroheptane Sulfonic Acid (PFHpS)
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluorohepanoic Acid
3.4
2.6
3.1
3.1
3.3
2.2
Perfluorohexadecanoic Acid (PFHxDA)
<2.0
<2.0
<2.0
<2.0 UJ
<2.0
<2.0
Perfluorohexane Sulfonic Acid
3.2
2.7
3.2
3.0
3.4
<2.0
Perfluorohexanoic Acid
7.5
6.2
7.2
7.4
7.7
2.2
Perfluorononanesulfonic Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluorononanoic Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluorooctadecanoic Acid
<2.0
<2.0
<2.0
<2.0 UJ
<2.0 UJ
<2.0
Perfluorooctane Sulfonamide
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluoropentane Sulfonic Acid (PFPeS)
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluoropentanoic Acid
6.9
5.8
6.9
6.7
6.7
7.6
Perfluorotetradecanoic Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluorotridecanoic Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
Perfluoroundecanoic Acid
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
PFOA
7.2
6.5
6.8
6.9
7.5
4.2
PFOS
12
11
12
12
12
<2.0
TR1156 1 of 4 June 2024

TABLE B2
SEEP AND SURFACE WATER OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC, P.C.
Location ID
LOCK -DAM SEEP
LOCK -DAM SEEP
OLDOF-1
OUTFALL 002
RIVER WATER INTAKE
2
SEEP-A-EFF
Field Sample ID
CAP1Q24-LOCK-DAM-
SEEP-012424
CAP1Q24-LOCK-DAM-
SEEP-012424-D
CAP1Q24-OLDOF-113-24-
012524
CAP1Q24-OUTFALL-002-
24-012524
RIVER -WATER-
INTAKE2-24-012524
CAP1Q24-SEEP-A-EFF-24
012524
Sample Date
1/24/2024
1/24/2024
1/25/2024
1/25/2024
1/25/2024
1/25/2024
QA/QC
Field Duplicate
Sample Delivery Group (SDG)
320-109128-1
320-109128-1
320-109127-1
320-109127-1
320-109127-1
320-109127-1
Lab Sample ID
320-109128-2
320-109128-3
320-109127-6
320-109127-5
320-109127-2
320-109127-3
537Mod (ng/L)
10:2 Fluorotelomer sulfonate
<84
<84
<2.0
<2.0
<2.0
<2.0
11 Cl-PF30UdS
<40
<40
<2.0
<2.0
<2.0
<2.0
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
<58
<30
<58
<2.0
<2.0
<2.0
<2.0
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
39
<2.0
<2.0
<2.0
<2.0
2-(N-ethyl perfluoro-l-octanesulfonamido)-ethanol
<110
<110
<2.0
<2.0
<2.0
<2.0
2-(N-methyl perfluoro-l-octanesulfonamido)-ethanol
<180
<180
<4.0
<4.0
<4.0
<4.0
6:2 Fluorotelomer sulfonate
<310
1,700 J
<5.0
<5.0
<5.0
<5.0
9C1-PF3ONS
<30
<30
<2.0
<2.0
<2.0
<2.0
DONA
<50
<50
<2.0
<2.0
<2.0
<2.0
N-Ethyl Perfluorooctane Sulfonamidoacetic Acid
<160
<160
<5.0
<5.0
<5.0
<5.0
N-ethylperfluoro-l-octanesulfonamide
<110
<110
<2.0
<2.0
<2.0
<2.0
N-methyl perfluoro-l-octanesulfonamide
<54
<54
<2.0
<2.0
<2.0
<2.0
N-Methyl Perfluorooctane Sulfonamidoacetic Acid
<150
<150
<5.0
<5.0
<5.0
<5.0
Perfluorobutane Sulfonic Acid
<25
<25
<2.0
4.8
4.6
<2.0
Perfluorobutanoic Acid
<300
<300
<5.0
<5.0
<5.0
<5.0
Perfluorodecane Sulfonic Acid
<40
<40
<2.0
<2.0
<2.0
<2.0
Perfluorodecanoic Acid
<39
<39
<2.0
<2.0
<2.0
<2.0
Perfluorododecane Sulfonic Acid (PFDoS)
<120
<120
<2.0
<2.0
<2.0
<2.0
Perfluorododecanoic Acid
<69
<69
<2.0
<2.0
<2.0
<2.0
Perfluoroheptane Sulfonic Acid (PFHpS)
<24
<24
<2.0
<2.0
<2.0
<2.0
Perfluoroheptanoic Acid
68
99
<2.0
3.1
2.9
<2.0
Perfluorohexadecanoic Acid (PFHxDA)
<110
<110
<2.0
<2.0
<2.0
<2.0
Perfluorohexane Sulfonic Acid
<71
<71
<2.0
2.9
2.8
<2.0
Perfluorohexanoic Acid
<73
<73
<2.0
7.3
7.4
<2.0
Perfluorononanesulfonic Acid
<46
<46
<2.0
<2.0
<2.0
<2.0
Perfluorononanoic Acid
<34
<34
<2.0
<2.0
<2.0
<2.0
Perfluorooctadecanoic Acid
<120
<120
<2.0 UJ
<2.0 UJ
<2.0 UJ
<2.0 UJ
Perfluorooctane Sulfonamide
<120
<120
<2.0
<2.0
<2.0
<2.0
Perfluoropentane Sulfonic Acid (PFPeS)
<38
<38
<2.0
<2.0
<2.0
<2.0
Perfluoropentanoic Acid
360
350
6.7
7.2
6.9
<2.0
Perfluorotetradecanoic Acid
<91
<91
<2.0
<2.0
<2.0
<2.0
Perfluorotridecanoic Acid
<160
<160
<2.0
<2.0
<2.0
<2.0
Perfluoroundecanoic Acid
<140
<140
<2.0
<2.0
<2.0
<2.0
PFOA
<110
<110
<2.0
6.9
6.4
<2.0
PFOS
<68
70
<2.0
9.9
8.9
<2.0
TR1156 2 of 4 June 2024

TABLE B2
SEEP AND SURFACE WATER OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Location ID
SEEP-B-EFF
SEEP-C-EFF
SEEP-D-EFF
WC-6
Field Sample ID
CAP1Q24-SEEP-B-EFF-24
012624
CAP1Q24-SEEP-C-EFF-24
012524
CAP1Q24-SEEP-D-EFF-24
012624
CAP IQ24-WC-6-24-012524
Sample Date
1/26/2024
1/25/2024
1/26/2024
1/25/2024
QA/QC
Sample Delivery Group (SDG)
320-109219-1
320-109127-1
320-109219-1
320-109127-1
Lab Sample ID
320-109219-1
320-109127-4
320-109219-2
320-109127-1
537 Mod (ng/L)
10:2 Fluorotelomer sulfonate
<2.0
<2.0
<2.0
<2.0
110-PF30UdS
<2.0
<2.0
<2.0
<2.0
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
<2.0
<2.0
<2.0
<2.0
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
<2.0
<2.0
<2.0
<2.0
2-(N-ethyl perfluoro-l-octanesulfonamido)-ethanol
<2.0
<2.0
<2.0
<2.0
2-(N-methyl perfluoro-l-octanesulfonamido)-ethanol
<4.0
<4.0
<4.0
<4.0
6:2 Fluorotelomer sulfonate
<5.0
<5.0
<5.0
<5.0
9C1-PF30NS
<2.0
<2.0
<2.0
<2.0
DONA
<2.0
<2.0
<2.0
<2.0
N-Ethyl Perfluorooctane Sulfonamidoacetic Acid
<5.0
<5.0
<5.0
<5.0
N-ethylperfluoro-l-octanesulfonamide
<2.0
<2.0
<2.0
<2.0
N-methyl perfluoro-l-octanesulfonamide
<2.0
<2.0
<2.0
<2.0
N-Methyl Perfluorooctane Sulfonamidoacetic Acid
<5.0
<5.0
<5.0
<5.0
Perfluorobutane Sulfonic Acid
<2.0
<2.0
<2.0
7.3
Perfluorobutanoic Acid
<5.0
<5.0
<5.0
<5.0
Perfluorodecane Sulfonic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorodecanoic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorododecane Sulfonic Acid (PFDoS)
<2.0
<2.0
<2.0
<2.0
Perfluorododecanoic Acid
<2.0
<2.0
<2.0
<2.0
Perfluoroheptane Sulfonic Acid (PFHpS)
<2.0
<2.0
<2.0
<2.0
Perfluoroheptanoic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorohexadecanoic Acid (PFHxDA)
<2.0
<2.0
<2.0
<2.0
Perfluorohexane Sulfonic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorohexanoic Acid
<2.0
<2.0
<2.0
2.8
Perfluorononanesulfonic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorononanoic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorooctadecanoic Acid
<2.0
<2.0 UJ
<2.0
<2.0 UJ
Perfluorooctane Sulfonamide
<2.0
<2.0
<2.0
<2.0
Perfluoropentane Sulfonic Acid (PFPeS)
<2.0
<2.0
<2.0
<2.0
Perfluoropentanoic Acid
<2.0
<2.0
<2.0
6.0
Perfluorotetradecanoic Acid
<2.0
<2.0
<2.0
<2.0
Perfluorotridecanoic Acid
<2.0
<2.0
<2.0
<2.0
Perfluoroundecanoic Acid
<2.0
<2.0
<2.0
<2.0
PFOA
<2.0
<2.0
<2.0
4.6
PFOS
<2.0
<2.0
<2.0
<2.0
Geosyntec Consultants of NC, P.C.
TR1156 3 of 4 June 2024

TABLE B2
SEEP AND SURFACE WATER OTHER PFAS ANALYTICAL RESULTS
Chemours Fayetteville Works, North Carolina
Location ID
EB
EB
Field Sample ID
CAP1Q24-EQBLK-IS-
012524
CAP1Q24-EQBLK-PP-
012524
Sample Date
1/25/2024
1/25/2024
QA/QC
Equipment Blank
Equipment Blank
Sample Delivery Group (SDG)
320-109127-1
320-109127-1
Lab Sample ID
320-109127-9
320-109127-8
537Mod (ng/L)
10:2 Fluorotelomer sulfonate
<2.0
<2.0
11 Cl-PF30UdS
<2.0
<2.0
1H,1H,2H,2H-perfluorodecanesulfonate (8:2 FTS)
<2.0
<2.0
1H,1H,2H,2H-perfluorohexanesulfonate (4:2 FTS)
<2.0
<2.0
2-(N-ethyl perfluoro-l-octanesulfonamido)-ethanol
<2.0
<2.0
2-(N-methyl perfluoro-l-octanesulfonamido)-ethanol
<4.0
<4.0
6:2 Fluorotelomer sulfonate
<5.0
<5.0
9C1-PF30NS
<2.0
<2.0
DONA
<2.0
<2.0
N-Ethyl Perfluorooctane Sulfonamidoacetic Acid
<5.0
<5.0
N-ethylperfluoro-l-octanesulfonamide
<2.0
<2.0
N-methyl perfluoro-l-octanesulfonamide
<2.0
<2.0
N-Methyl Perfluorooctane Sulfonamidoacetic Acid
<5.0
<5.0
Perfluorobutane Sulfonic Acid
<2.0
<2.0
Perfluorobutanoic Acid
<5.0
<5.0
Perfluorodecane Sulfonic Acid
<2.0
<2.0
Perfluorodecanoic Acid
<2.0
<2.0
Perfluorododecane Sulfonic Acid (PFDoS)
<2.0
<2.0
Perfluorododecanoic Acid
<2.0
<2.0
Perfluoroheptane Sulfonic Acid (PFHpS)
<2.0
<2.0
Perfluorohepanoic Acid
<2.0
<2.0
Perfluorohexadecanoic Acid (PFHxDA)
<2.0
<2.0
Perfluorohexane Sulfonic Acid
<2.0
<2.0
Perfluorohexanoic Acid
<2.0
<2.0
Perfluorononanesulfonic Acid
<2.0
<2.0
Perfluorononanoic Acid
<2.0
<2.0
Perfluorooctadecanoic Acid
<2.0 UJ
<2.0 UJ
Perfluorooctane Sulfonamide
<2.0
<2.0
Perfluoropentane Sulfonic Acid (PFPeS)
<2.0
<2.0
Perfluoropentanoic Acid
<2.0
<2.0
Perfluorotetradecanoic Acid
<2.0
<2.0
Perfluorotridecanoic Acid
<2.0
<2.0
Perfluoroundecanoic Acid
<2.0
<2.0
PFOA
<2.0
<2.0
PFOS
<2.0
<2.0
Notes:
Bold - Analyte detected above associated reporting limit
B - Analyte detected in an associated blank
EPA - Environmental Protection Agency
J - Analyte detected. Reported value may not be accurate
or precise
UJ - Analyte not detected. Reporting limit may not be
accurate or precise.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
< - Analyte not detected above associated reporting limit.
-- - Not measured / Not Applicable
Geosyntec Consultants of NC, P.C.
TR1156 4 of 4 June 2024

TABLE B3 Geosyntec Consultants of NC, P.C.
FLOW SUMMARY FOR CAPE FEAR RIVER LOCATIONS
Chemours Fayetteville Works, North Carolina
Ql 2024
Sample Collection
�
Travel Time Offset
Adjusted Flow Gauging
Composite Sample 24
Grab Sample Instantaneous
Quarterly Event
Pathway/ Location
Timepoint
Flow Gauging Location
z
(hr)
Timepoint
Hour Flow Volume
a 4
Flow Rate (ft /s)
(MGD)s
Upstream River Water and
01/24/24 9:15
William O Huske Lock and
--
01/24/24 9:15
10,844
Groundwater
Dam
Tarheel (Grab Sample)
01/24/24 14:10
William O HDuasmke Lock and
3
01/24/24 11:00
--
10,900
January 2024
Tarheel (Composite Sample)
01/25/24 10:24
William O HDuasmke Lock and
3
01/25/24 7:00
6,570
--
Bladen Bluff
01/24/24 13:50
William O Huske Lock and
2
01/24/24 11:30
--
10,800
Kings Bluff
01/25/24 12:07
Cape Fear River Lock and
--
01/25/24 12:07
11,200
Dam #1
Notes:
1 - Flow rate measured at USGS gauging station #02105500 located at William O Huske Lock & Dam and USGS gauging station # 02105769 located at Lock and Dam #1 near Kelly, North Carolina.
2 - Flow rates measured at William O Huske Lock and Dam were used for mass loading assessments at Tar heel and Bladen Bluff sample locations. Travel times between William O Huske Lock and Dam and the
downstream locations were estimated based on the results of a numerical model of the Cape Fear River developed by Geosyntec which developed a regression curve between the USGS reported gage heights at
William O Huske Lock and Dam and travel times.
3 - Total flow volume for composite samples is based on measurements taken over 24-hour sample collection period.
4 - Instantaneous flow rate for grab samples is the recorded flow rate at the time of grab sample collection.
Acronyms:
fl3/s - cubic feet per second
hr - hours
MGD - millions of gallons per day
TR1156 Page 1 of 1 June 2024

TABLE B4 Geosyntec Consultants of NC, P.C.
FLOW DATA FOR W.O'HUSKE LOCK NR TAR HEEL, NC
Chemours Fayetteville Works, North Carolina
Date and Time
Flow Rate
(ft3/sec)
Flow Volume
gal)
Gage Height (ft)
Precipitation (in)'
1/24/2024 0:00
11900
80,116,155
6.14
0
1/24/2024 0:15
11900
80,116,155
6.14
0
1/24/2024 0:30
11900
80,116,155
6.14
0
1/24/2024 0:45
11900
80,116,155
6.13
0
1/24/20241:00
11900
80,116,155
6.13
0
1/24/20241:15
11900
80,116,155
6.13
0
1/24/20241:30
11900
80,116,155
6.13
0
1/24/20241:45
11900
80,116,155
6.13
0
1/24/2024 2:00
11800
79,442,910
6.11
0
1/24/2024 2:15
11800
79,442,910
6.11
0
1/24/2024 2:30
11800
79,442,910
6.11
0
1/24/2024 2:45
11800
79,442,910
6.11
0
1/24/2024 3:00
11800
79,442,910
6.1
0
1/24/2024 3:15
11800
79,442,910
6.1
0
1/24/2024 3:30
11700
78,769,665
6.09
0
1/24/2024 3:45
11700
78,769,665
6.09
0
1/24/2024 4:00
11700
78,769,665
6.08
0
1/24/2024 4:15
11700
78,769,665
6.07
0
1/24/2024 4:30
11700
78,769,665
6.07
0
1/24/2024 4:45
11700
78,769,665
6.06
0
1/24/2024 5:00
11600
78,096,420
6.05
0
1/24/2024 5:15
11600
78,096,420
6.04
0
1/24/2024 5:30
11500
77,423,175
6.02
0
1/24/2024 5:45
11600
78,096,420
6.03
0
1/24/2024 6:00
11500
77,423,175
6.01
0
1/24/2024 6:15
11500
77,423,175
6
0
1/24/2024 6:30
11500
77,423,175
6
0
1/24/2024 6:45
11400
76,749,930
5.99
0
1/24/2024 7:00
11400
76,749,930
5.98
0
1/24/2024 7:15
11400
76,749,930
5.97
0
1/24/2024 7:30
11400
76,749,930
5.96
0
1/24/2024 7:45
11300
76,076,685
5.95
0
1/24/2024 8:00
11300
76,076,685
5.93
0
1/24/2024 8:15
11200
75,403,440
5.92
0
1/24/2024 8:30
11200
75,403,440
5.92
0
1/24/2024 8:45
11200
75,403,440
5.9
0
1/24/2024 9:00
11100
74,730,195
5.88
0
1/24/2024 9:15
11100
74,730,195
5.87
0
1/24/2024 9:30
11000
74,056,950
5.85
0
1/24/2024 9:45
11100
74,730,195
5.86
0
1/24/202410:00
11000
74,056,950
5.85
0
1/24/202410:15
11000
74,056,950
5.84
0
1/24/202410:30
11000
74,056,950
5.83
0
1/24/202410:45
10900
73,383,705
5.82
0
1/24/202411:00
10900
73,383,705
5.81
0
1/24/202411:15
10900
73,383,705
5.8
0
1/24/202411:30
10800
72,710,460
5.79
0
1/24/202411:45
10800
72,710,460
5.79
0
1/24/202412:00
10800
72,710,460
5.78
0
1/24/202412:15
10800
72,710,460
5.76
0
1/24/202412:30
10700
72,037,215
5.75
0
1/24/202412:45
10700
72,037,215
5.74
0
TR1156 Page 1 of 4 June 2024

TABLE B4 Geosyntec Consultants of NC, P.C.
FLOW DATA FOR W.O'HUSKE LOCK NR TAR HEEL, NC
Chemours Fayetteville Works, North Carolina
Date and Time
Flow Rate
(ft3/sec)((gal)
Flow Volume
Gage Height (ft)
Precipitation (in)'
1/24/202413:00
10700
72,037,215
5.73
0
1/24/202413:15
10600
71,363,970
5.72
0
1/24/202413:30
10600
71,363,970
5.71
0
1/24/202413:45
10600
71,363,970
5.7
0
1/24/202414:00
10600
71,363,970
5.7
0
1/24/202414:15
10600
71,363,970
5.69
0
1/24/202414:30
10500
70,690,725
5.67
0
1/24/202414:45
10500
70,690,725
5.67
0
1/24/202415:00
10500
70,690,725
5.67
0
1/24/202415:15
10500
70,690,725
5.66
0
1/24/202415:30
10400
70,017,480
5.65
0
1/24/202415:45
10400
70,017,480
5.64
0
1/24/202416:00
10400
70,017,480
5.63
0
1/24/202416:15
10300
69,344,235
5.62
0
1/24/202416:30
10300
69,344,235
5.62
0
1/24/202416:45
10300
69,344,235
5.61
0
1/24/202417:00
10300
69,344,235
5.6
0
1/24/202417:15
10300
69,344,235
5.6
0
1/24/202417:30
10200
68,670,990
5.58
0
1/24/202417:45
10200
68,670,990
5.58
0
1/24/202418:00
10200
68,670,990
5.57
0
1/24/202418:15
10200
68,670,990
5.56
0
1/24/202418:30
10200
68,670,990
5.56
0
1/24/202418:45
10100
67,997,745
5.55
0
1/24/202419:00
10100
67,997,745
5.55
0
1/24/202419:15
10100
67,997,745
5.54
0
1/24/202419:30
10100
67,997,745
5.53
0
1/24/202419:45
10100
67,997,745
5.53
0
1/24/2024 20:00
10100
67,997,745
5.52
0
1/24/2024 20:15
10100
67,997,745
5.52
0
1/24/2024 20:30
10000
67,324,500
5.51
0
1/24/2024 20:45
10000
67,324,500
5.5
0
1/24/2024 21:00
10000
67,324,500
5.5
0
1/24/2024 21:15
9970
67,122,527
5.49
0
1/24/2024 21:30
9970
67,122,526
5.49
0
1/24/2024 21:45
9970
67,122,526
5.49
0
1/24/2024 22:00
9920
66,785,904
5.47
0
1/24/2024 22:15
9920
66,785,904
5.47
0
1/24/2024 22:30
9950
66,987,877
5.48
0
1/24/2024 22:45
9920
66,785,904
5.47
0
1/24/2024 23:00
9920
66,785,904
5.47
0
1/24/2024 23:15
9860
66,381,957
5.45
0
1/24/2024 23:30
9890
66,583,931
5.46
0
1/24/2024 23:45
9830
66,179,983
5.44
0
1/25/2024 0:00
9860
66,381,957
5.45
0
1/25/2024 0:15
9800
65,978,010
5.43
0
1/25/2024 0:30
9770
65,776,036
5.42
0
1/25/2024 0:45
9770
65,776,036
5.42
0
1/25/20241:00
9770
65,776,037
5.42
0
1/25/20241:15
9750
65,641,387
5.41
0
1/25/20241:30
9690
65,237,440
5.39
0
1/25/20241:45
9690
65,237,441
5.39
0
TR1156 Page 2 of 4 June 2024

TABLE B4 Geosyntec Consultants of NC, P.C.
FLOW DATA FOR W.O'HUSKE LOCK NR TAR HEEL, NC
Chemours Fayetteville Works, North Carolina
Date and Time
Flow Rate
(ft3/sec)((gal)
Flow Volume
Gage Height (ft)
Precipitation (in)'
1/25/2024 2:00
9660
65,035,467
5.38
0
1/25/2024 2:15
9660
65,035,467
5.38
0
1/25/2024 2:30
9630
64,833,494
5.37
0
1/25/2024 2:45
9630
64,833,493
5.37
0
1/25/2024 3:00
9600
64,631,520
5.36
0
1/25/2024 3:15
9600
64,631,520
5.36
0
1/25/2024 3:30
9580
64,496,871
5.35
0
1/25/2024 3:45
9580
64,496,871
5.35
0
1/25/2024 4:00
9520
64,092,924
5.33
0
1/25/2024 4:15
9520
64,092,924
5.33
0.01
1/25/2024 4:30
9520
64,092,924
5.33
0
1/25/2024 4:45
9520
64,092,924
5.33
0
1/25/2024 5:00
9460
63,688,977
5.31
0
1/25/2024 5:15
9440
63,554,328
5.3
0
1/25/2024 5:30
9410
63,352,355
5.29
0
1/25/2024 5:45
9410
63,352,354
5.29
0
1/25/2024 6:00
9410
63,352,354
5.29
0
1/25/2024 6:15
9380
63,150,381
5.28
0
1/25/2024 6:30
9350
62,948,407
5.27
0
1/25/2024 6:45
9350
62,948,407
5.27
0
1/25/2024 7:00
9350
62,948,408
5.27
0
1/25/2024 7:15
9320
62,746,434
5.26
0
1/25/2024 7:30
9300
62,611,785
5.25
0.01
1/25/2024 7:45
9300
62,611,785
5.25
0
1/25/2024 8:00
9270
62,409,811
5.24
0
1/25/2024 8:15
9240
62,207,838
5.23
0
1/25/2024 8:30
9210
62,005,865
5.22
0
1/25/2024 8:45
9210
62,005,864
5.22
0
1/25/2024 9:00
9180
61,803,891
5.21
0
1/25/2024 9:15
9180
61,803,891
5.21
0
1/25/2024 9:30
9180
61,803,891
5.21
0
1/25/2024 9:45
9160
61,669,242
5.2
0
1/25/202410:00
9160
61,669,242
5.2
0
1/25/202410:15
9160
61,669,242
5.2
0
1/25/202410:30
9100
61,265,295
5.18
0
1/25/202410:45
9100
61,265,295
5.18
0.01
1/25/202411:00
9100
61,265,295
5.18
0
1/25/202411:15
9100
61,265,295
5.18
0
1/25/202411:30
9070
61,063,322
5.17
0
1/25/202411:45
9070
61,063,321
5.17
0
1/25/202412:00
9070
61,063,321
5.17
0
1/25/202412:15
9050
60,928,673
5.16
0
1/25/202412:30
9050
60,928,672
5.16
0
1/25/202412:45
9020
60,726,699
5.15
0
1/25/202413:00
8990
60,524,726
5.14
0
1/25/202413:15
8990
60,524,725
5.14
0
1/25/202413:30
8990
60,524,725
5.14
0
1/25/202413:45
8960
60,322,752
5.13
0
1/25/202414:00
8960
60,322,752
5.13
0
1/25/202414:15
8960
60,322,752
5.13
0
1/25/202414:30
8940
60,188,103
5.12
0
1/25/202414:45
8960
60,322,752
5.13
0
TR1156 Page 3 of 4 June 2024

TABLE B4 Geosyntec Consultants of NC, P.C.
FLOW DATA FOR W.O'HUSKE LOCK NR TAR HEEL, NC
Chemours Fayetteville Works, North Carolina
Date and Time
Flow Rate
(ft3/sec)
Flow Volume
(gal)
Gage Height (ft)
Precipitation (in)'
1/25/202415:00
8940
60,188,103
5.12
0
1/25/202415:15
8940
60,188,103
5.12
0.06
1/25/202415:30
8910
59,986,129
5.11
0
1/25/202415:45
8910
59,986,129
5.11
0
1/25/202416:00
8910
59,986,130
5.11
0
1/25/202416:15
8850
59,582,182
5.09
0
1/25/202416:30
8880
59,784,156
5.1
0
1/25/202416:45
8850
59,582,183
5.09
0
1/25/202417:00
8880
59,784,156
5.1
0
1/25/202417:15
8850
59,582,182
5.09
0
1/25/202417:30
8850
59,582,183
5.09
0
1/25/202417:45
8830
59,447,533
5.08
0
1/25/202418:00
8830
59,447,533
5.08
0
1/25/202418:15
8830
59,447,534
5.08
0
1/25/202418:30
8830
59,447,533
5.08
0
1/25/202418:45
8800
59,245,560
5.07
0
1/25/202419:00
8830
59,447,534
5.08
0
1/25/202419:15
8800
59,245,560
5.07
0.01
1/25/202419:30
8800
59,245,560
5.07
0
1/25/202419:45
8800
59,245,560
5.07
0
1/25/2024 20:00
8800
59,245,560
5.07
0
1/25/2024 20:15
8770
59,043,586
5.06
0
1/25/2024 20:30
8770
59,043,587
5.06
0
1/25/2024 20:45
8770
59,043,586
5.06
0
1/25/2024 21:00
8770
59,043,586
5.06
0
1/25/2024 21:15
8770
59,043,587
5.06
0
1/25/2024 21:30
8770
59,043,586
5.06
0
1/25/2024 21:45
8740
58,841,613
5.05
0
1/25/2024 22:00
8770
59,043,587
5.06
0
1/25/2024 22:15
8770
59,043,586
5.06
0
1/25/2024 22:30
8740
58,841,613
5.05
0
1/25/2024 22:45
8720
58,706,964
5.04
0
1/25/2024 23:00
8740
58,841,613
5.05
0
1/25/2024 23:15
8740
58,841,613
5.05
0
1/25/2024 23:30
8720
58,706,964
5.04
0
1/25/2024 23:45
8720
58,706,964
5.04
0
Notes
Measurements are recorded from the USGS flow gauging station at the W.O. Huske Dam, ID
02105500 (USGS, 2021).
1 - The minimum value recorded by a USGS raingage is 0.01 inches. Anything detected below this
threshold is recorded as zero inches.
ft3/sec - cubic feet per second
ft - feet
gal - gallons
in - inches
USGS - United States Geological Survey
TR1156 Page 4 of 4 June 2024

TABLE B5 Geosyntec Consultants of NC, P.C.
FLOW DATA FOR LOCK #1 NR KELLY, NC
Chemours Fayetteville Works, North Carolina
Date
Time
Discharge (cubic
ft/sec)
Seconds
Volume (gal)
1/25/2024
2:45
11,800
8100
714,986,190
1/25/2024
5:00
--
900
0
1/25/2024
5:15
--
900
0
1/25/2024
5:30
11,700
900
78,769,665
1/25/2024
5:45
11,600
900
78,096,420
1/25/2024
6:00
11,600
900
78,096,420
1/25/2024
6:15
11,700
900
78,769,665
1/25/2024
6:30
11,600
900
78,096,420
1/25/2024
6:45
11,600
900
78,096,420
1/25/2024
7:00
11,600
900
78,096,420
1/25/2024
7:15
11,500
900
77,423,175
1/25/2024
7:30
11,500
900
77,423,175
1/25/2024
7:45
11,500
900
77,423,175
1/25/2024
8:00
11,500
900
77,423,175
1/25/2024
8:15
11,500
900
77,423,175
1/25/2024
8:30
11,500
900
77,423,175
1/25/2024
8:45
11,400
900
76,749,930
1/25/2024
9:00
11,400
900
76,749,930
1/25/2024
9:15
11,400
900
76,749,930
1/25/2024
9:30
11,400
900
76,749,930
1/25/2024
9:45
11,300
900
76,076,685
1/25/2024
10:00
11,300
900
76,076,685
1/25/2024
10:15
11,300
900
76,076,685
1/25/2024
10:30
11,400
900
76,749,930
1/25/2024
10:45
11,300
900
76,076,685
1/25/2024
11:00
11,300
900
76,076,685
1/25/2024
11:15
11,300
900
76,076,685
1/25/2024
11:30
11,300
900
76,076,685
1/25/2024
11:45
11,300
900
76,076,685
1/25/2024
12:00
119200
900
75,4039440
1/25/2024
12:15
11,200
900
75,403,440
1/25/2024
12:30
119200
900
7594039440
1/25/2024
12:45
11,200
900
75,403,440
1/25/2024
13:00
11,200
900
75,403,440
1/25/2024
13:15
11,100
900
74,730,195
1/25/2024
13:30
11,100
900
74,730,195
1/25/2024
13:45
11,100
900
74,730,195
1/25/2024
14:00
11,100
900
74,730,195
1/25/2024
14:15
11,100
900
74,730,195
1/25/2024
14:30
11,100
900
74,730,195
1/25/2024
14:45
11,100
900
74,730,195
1/25/2024
15:00
11,100
900
74,730,195
1/25/2024
15:15
11,000
900
74,056,950
1/25/2024
15:30
11,000
900
74,056,950
1/25/2024
15:45
11,000
900
74,056,950
1/25/2024
16:00
11,000
900
74,056,950
1/25/2024
16:15
11,000
900
74,056,950
1/25/2024
16:30
11,000
900
74,056,950
1/25/2024
16:45
11,000
900
74,056,950
1/25/2024
17:00
10,900
900
73,383,705
1/25/2024
17:15
10,900
900
73,383,705
TR1156 Page 1 of 2 June 2024

TABLE B5 Geosyntec Consultants of NC, P.C.
FLOW DATA FOR LOCK #1 NR KELLY, NC
Chemours Fayetteville Works, North Carolina
Date
Time
Discharge (cubic
ft/sec)
Seconds
Volume (gal)
1/25/2024
17:30
10,900
900
73,383,705
1/25/2024
17:45
10,900
900
73,383,705
1/25/2024
18:00
10,900
900
73,383,705
1/25/2024
18:15
10,800
900
72,710,460
1/25/2024
18:30
10,800
900
72,710,460
1/25/2024
18:45
10,800
900
72,710,460
1/25/2024
19:00
10,800
900
72,710,460
1/25/2024
19:15
10,800
900
72,710,460
1/25/2024
19:30
10,700
900
72,037,215
1/25/2024
19:45
10,800
900
72,710,460
1/25/2024
20:00
10,800
900
72,710,460
1/25/2024
20:15
10,700
900
72,037,215
1/25/2024
20:30
10,700
900
72,037,215
1/25/2024
20:45
10,700
900
72,037,215
1/25/2024
21:00
10,600
900
71,363,970
1/25/2024
21:15
10,600
900
71,363,970
1/25/2024
21:30
10,600
900
71,363,970
1/25/2024
21:45
10,600
900
71,363,970
1/25/2024
22:00
10,600
900
71,363,970
1/25/2024
22:15
10,600
900
71,363,970
1/25/2024
22:30
10,600
900
71,363,970
1/25/2024
22:45
10,500
900
70,690,725
1/25/2024
23:00
10,500
900
70,690,725
1/25/2024
23:15
10,500
900
70,690,725
1/25/2024
23:30
10,500
900
70,690,725
1/25/2024
23:45
10,500
900
70,690,725
Notes
Measurements are recorded from the USGS flow gauging station at Lock #1 near Kelly, ID 02105769
(USGS, 2021).
fe/sec - cubic feet per second
ft - feet
gal - gallons
USGS - United States Geological Survey
TR1156 Page 2 of 2 June 2024

TABLE B6
Table 3+ PFAS MASS DISCHARGE AT DOWNSTREAM LOCATIONS
Chemours Fayetteville Works, North Carolina
Pathway Number
--
--
--
--
Pathway Name
Tar Heel Ferry Road Bridge ''2
Tar Heel Ferry Road Bridge
Bladen Blufe
Kings B1uff2
Flow (MG)
--
6,570
--
--
Instantaneous Flow ft3/sec
10,900
--
10,800
11,200
Program
CAP SW Sampling 1Q24
CAP SW Sampling 1Q24
CAP SW Sampling 1Q24
CAP SW Sampling 1Q24
Location ID
CFR-TARHEEL
CFR-TARHEEL
CFR-BLADEN
CFR-KINGS
Field Sample ID
CAP1Q24-CFR-TARHEEL-012424
CAP1Q24-CFR-TARHEEL-24-012524
CAPIQ24-CFR-BLADEN-012424
CAPIQ24-CFR-KINGS-012524
Sample Date and Time'
1/24/2024
1/25/2024
1/24/2024
1/25/2024
Sample Deliver Group (SDG)
320-109128-1
320-109127-1
320-109128-1
320-109128-1
Lab Sample ID
320-109128-6
320-109127-7
320-109128-5
320-109128-7
Sample Type
Grab
Composite
Grab
Grab
Table 3+ Mass Discharge 3 (mg/s)
HFPO-DA
ND
ND
ND
ND
PFMOAA
ND
0.63
ND
0.98
PF02HxA
ND
ND
ND
ND
PF030A
ND
ND
ND
ND
PF04DA
ND
ND
ND
ND
PF05DA
ND
ND
ND
ND
PMPA
0.68
0.60
0.70
0.67
PEPA
ND
ND
ND
ND
PS Acid
ND
ND
ND
ND
Hydro -PS Acid
ND
ND
ND
ND
R-PSDA
ND
ND
ND
ND
Hydrolyzed PSDA
ND
ND
ND
ND
R-PSDCA
ND
ND
ND
ND
NVHOS, Acid Form
ND
ND
ND
ND
EVE Acid
ND
ND
ND
ND
Hydro -EVE Acid
ND
ND
ND
ND
R-EVE
ND
ND
ND
ND
PES
ND
ND
ND
ND
PFECA B
ND
ND
ND
ND
PFECA-G
ND
ND
ND
ND
PFPrA
3.70
3.45
3.67
3.81
Total Attachment C Mass Discharge4,5
0.68
1.24
0.70
1.65
Total Table 3+ Mass Discharge (17 compounds) 4,6
0.68
1.24
0.70
1.65
Total Table 3+ Mass Discharge (18 compounds)4,'
4.32
4.61
4.28
5.39
Total Table 3+ Mass Discharge (21 com ounds)4
4.32
4.61
4.28
5.39
Notes:
1 - A paired composite sample was collected at Tar Heel Ferry Road Bridge on July 27, 2023.
2 - Mass discharge values for grab samples collected at Tar Heel Ferry Road Bridge, Bladen Bluff, and Kings Bluff are determined based on instantaneous flow rates.
3 - Mass discharge by analyte is calculated based on Table 3+ concentrations in Table 3, and 24-hour flow volumes reported in Table B5.
4 - Total PFAS mass discharge is based on the summed Total PFAS concentrations reported in Table 3, which are rounded to two significant figures.
5 - Total Attachment C does not include Perfluoroheptanoic acid (PFHpA).
6 - Total Table 3+ (17 compounds) does not include Perfluoroheptanoic acid (PFHpA), R-PSDA, Hydrolyzed PSDA, R-EVE, and PFPrA.
7 - Total Table 3+ (18 compounds) does not include Perfluoroheptanoic acid (PFHpA), R-PSDA, Hydrolyzed PSDA, and R-EVE.
Bold - Analyte detected above associated reporting limit
ft3/sec - cubic feet per second
mg/s - milligrams per second
ND - Analyte not detected above associated reporting limit.
Geosyntec Consultants of NC, P.C.
TR1156 Page 1 of 1 June 2024

GeosMte&
consultants
Geosyntec Consultants of NC, P.C.
NC License No.: C-3500 and C-295
Appendix C
Field Forms
TR 1156 - Cape Fear River PFAS Mass Loading Assessment— First Quarter 2024 Report 21 June 2024

Site Name: Chem.— Fayetleville
Samplers: DEBORAH AVERSKEN STUARTSAIRA BOHAM
Data 01-03-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: Weekly River
Time: 13:01
Project Manager: Tracy Ovbey
Event Type: Sampling
-------------
Sampling Data
Sampling Method: Pen Pump Grab
ISCO Start Data and Time: _
ISCO End Date and Time:
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
53.00
Sunny
None
3
Staff gauge
Multi Meter Lead: Inailu Aqua Troll
Multi Meta, ID: 708720
Latitude: 34.745176]]31]12
Longitude:-78.7854037284264 Y'
Staff Gauge Water Level Reading (ff): 4.5
Temperature Reading (degrees C): 16 GPS Location (if collected)
Rain Reading (mm) 0
General Comment: Grab for CFR-TARHEEL-010324 at 1305 and at up ISCOs
Sampling Comments. Switched pump heads with DEQ ISCO because original Tarheel ISCO would not calibrate
PARSONS

Site Name: Chemours Fayetteville
Samplers: DEBORAH AVERS FELIPE SILVA SAIRA BOHAM
Data 01-05-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event Weekly River
Time: 11:z7
Project Manager Tracy Ovbey
Event Type: Sampling
Semolina Data
Sampling Methotl: Pen Pump Grab
ISCO Start Date and Time: _
ISCO End Data and Time:
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind(ri
39.00
Sunny
None
6
Multi Meter Usetl: Insitu Aqua Troll
Multi Meter ID: 706720
Latitude: 34,7449803279796
Longitude: _78.7852036084909 0
Stag Gauge W a[er Level Reading (ft): 6 '
Temperature Reading (degrees C): 20 GPS Location (if collected)
Rain Reading (mm) 0
General Comment: ISCO malfunctioned and did not run yesterday, collected grab and setup DIED to run 1/8/24
Sampling Comments:
P PARiMm

Site Name: Chemours Fayetteville
Samplers: BRANDON WEIDNER SAIRA BOHAM
Data 01-08-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: Weekly River
Time: 10:05
Project Manager: ra�
Event Type. Samplin
-------------
Semolina Data
Sampling Method: Pan Pump Grab
ISCO Start Data and Time: _
ISCO End Data and Time:
WEATHER CONDITIONS
Temperature (F).
Sky:
Precipitation:
Wind (mph)
42.00
Party Cloudy
None
6
Multi Meter Used: Insilu Aqua Troll
Multi Meter ID: ]O6]20
Latitude: 34.7449143294808
Longitude:-78.7851602600047 V
Staff Gauge Water Level Reading (ft): gpera'
r
Temperature Reading (degrees C): 9 GPS Location (i(collectetl)
Rain Reading (mm) 10
General Comment: TARHEEL ISCO did not run, missing sample distribution ram. DEO ISCO ran but sample silicon was pinched and no sample Flowed into sample container; ..at for 1/9/24
Sampling Comments: Collected 118/24 grab using ISCO
V's
SCos
pPARSONS

Site Name: Chemours Fayaft,,Wle
Samplers: BRANDON WEIDNER
Data 01-10-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: 7 Weekly River
Time: 12:15
Project Manager: Tracy Ovbey
Event Type: Sampling
Sampling Data
Sampling Method: ISCO Composite
ISCO Start Date and Time: 01-09-2024 00:01
ISCO End Date and Time: 01-09-2024 23:01
WEATHER CONDITIONS
Temperature (F).
Sky:
Preapitation:
Wind (mph)
47.00
Sunny
None
16
Multi Meter Used: Insilu Aqua Troll
Multi Meter ID: 706720
Latitude: 34,7449674349914
Longitude:-78.7851820093699 9
Staff Gauge Water Level Reading (ff): 9.5
Temperature Reading (degrees C): 12 GPS Location (it collected)
Rain Reading (mm) 34
General Comment: Collected samples and removed ISCOs due to possible flooding over night; Collect.d CFR-TARHEEL-24-010924 and partial sample from 1-10-24.
Sampling Comments:
PARSONS

Slte Name: Chemours Fayetteville
Samplers: DEBORAH AYERSIFELIPE SILVAI
Uri. 1 01-11-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: Weekly River
Time: 15:09
Project Manager Tmcy Ovbey
Event Type: Sampling
S I ID
S I Date Time
Parameters
IN
DO
R:tl-
urbiditl
Spec. Cond.
Temp.
Color
Odor
gA/QC
Date Time
m /L
mV
NTU
VS/cm
aC
CFR-TARHEEL-111124
01-11-212415:30
1-11-2024 15:31
8.70
10.03
122.80
298.00
6.72
17.07
C111dy/Brown
No
1
1
1
Samolina Data
Sampling Method: Bailer
ISCO Start Date antl Time: --
ISCO End Date antl Time:
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
55.00
Sunny
None
0
Mulb Meter Used: InsiW Aqua Troll
MuIB Meter ID: 706751
Latitude: 34.744877680031
Longitude:-78.7854519438005 V
SIaH Gauge Water Level Reading (%): 15
Temperoture Reatling (degrees C): 13 GPS Location (if collected)
Rain Reeding (mm) o
General Comment: Collected CFR-TARHEEL-011124
Sampling Comments:
P PARSONS

She Name: Chemours Fayetteville
Samplers' KEN STUART
Date', 01-12-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: Weekly River
Time: oe:az
Project Manager: Tmcy Ovbey
Event Type: Sampling
Sampling Data
Sampling Method: Bailer
ISCO Start Date and Time: --
ISCO End Data and Time:
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
36.00
Sunny
None
7
M
Mulb Meter Used: InsiW Aqua Troll
MuIB Meter ID: 706682
Latitutle: 34.7450003
Longitude:-78.785229 V
Staff Gauge Water Level Reading (9): >15 ft.
Temperature Reading (degr
ees C): 6 GPS Location (if collected)
Rain Reading (mm) 0
General Comment: River high ISCO removed
Sampling Comments: 01-1
P PARSONS

Site Name: Chemoura Fayetteville
Samplers: HERBERT WATTS KEN STUART
Data 01-16-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: Weekly River
Time: 10:2g
Project Manager Tracy Ovbey
Event Type: Sampling
$ I ID
S 1 Dale Time
Parameters
pH
DO
Red*,
Turbid
Spec. Coml.
Temp.
Color
Odor
DAIOC
Data Tlme
m /L
mV
NTU
pS/cm
"C
CFR-TARHEEL-111624
01-16-212411:21
01-16-2024 11:21
7.12
11.09
118.30
245.02
196.36
11.53
Tan dowdy
None
1
1
I
Samolina Dala
Sampling Method: Pan Pump Grab
ISCO Start Date and Time: _
ISCO End Data and Time:
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation: Wind(mph)
ARain
MOO Meter Used: Insilu Aqua Troll
Multi Meter ID: 706751
Latitude: 34.7450007
Longitude:-78.7851355 9
Staff Gauge Water Level Reading (ft): >15 ft
Temperature Reading (degrees C): 10 GPS Location (R collected)
Rain Reading (mm) 11
General Comment: Re installed ISCO to start at 011724 at 0001
Sampling Comments: River just came down to past the had
r PARSONS

Site Name: Chemoure Fayetteville
Samplers: DEBORAH AYERSSAIRA BOHAM
Data 01-19-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: Weekly River
Time: 09:04
Project Manager Tracy Ovbey
Event Type: Sampling
$ I ID
S I Date Time
Parameters
pH
DO
Retloz
Turbid
Spec. Cond.
Temp.
Color
Odor
OAIOC
Date Time
m /L
mV
NTU
PS/cm
"C
CFR-TARHEEL-14-111824
01-18-101423:11
01-19-2024 09:10
8.11
9A4
9.60
75.50
314.26
11.03
Cloudy
No
1
1
1
1
Samolina Data
Sampling Method: ISCO Composite
ISCO Start Data and Time: 01-18-2024 00:01
ISCO End Data and Time: 01-18-202423:01
WEATHER CONDITIONS
Temperature (F).
Sky:
Precipitation:
Wind (mph)
48.00
Sunny
None
12
Multi Meter Used: Insitu Aqua Troll
Multi Meter ID: F 706720
Latitude: 34.7454318033355
Longitude:-78.7850288132745 0
Staff Gauge Water Level Reading (ft): 14.7
Temperature Reading (degrees C): 12 GPS Location (H collected)
Rain Reading (ram) 2
General Comment Collected CFR-Tarhee1-24-011724, and CFR-Tarheel-24-011BM; no errors
Sampling Comments:
r PARSONS

Slte Name: Chemours Fayetteville
Samplers: BEN KRAUSEIBRANDON WEIDNERIBROCK SHATTUCKI
Uri. 1 01-23-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: Weekly River
Time: 13:50
Project Manager Tmcy Ovbey
Event Type: Sampling
Samolina Data
Sampling Method: Bottle Grab
ISCO Start Date antl Time: --
ISCO End Dale antl Time:
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
54.00
Cloudy
None
3
Mulb Meter Used: InsiW Aqua Troll
MuIB Meter ID: 706682
Latitutle: 34,7aaga08332211
Longitude:-78.7851865590352 V
Soff Gauge Water Level Reading (ft): 10.1
Temperature Reeding (degrees C): 15 GPS Location (if collected)
Rain Reatling (mm) 0
General Comment: Collected CFR-Tarheel-24-011924-no errors,CFR-Tarheel-24-012024-no errors,CFR-Tarheel-21-012124- powerfailure, and colleced CFR-Tarheel-23-012224-p—rfailure, and; Set up CAP -CO
Sampling Comments:
P PARSONS

Slte Name: Chemoum Fayetteville
Samplers: BEBORAH AVERSISAIRA BOHAMI
Data 1 01-26-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: 6 Weekly River
Time: 11:16
Project Manager: Tmcy Ovbey
Event Type: Sampling
Sampling Data
Sampling Method: ISCO Composite
ISCO Stan Date and Time: 01-24-2024 00:01
ISCO End Data and Time: 01-24-202423:01
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
72.00
Party Sunny
None
11
Multi Meter Used: InsiW Aqua Troll
MuIB Meter ID: 706682
Latitutle: M.7449488195031 1p
Longitude:-78.7850100929116 9
Staff Gauge Water Level Reading (H): 7.7
1
Temperature Reading (degrees C): 25 GPS Location (if collected)
Rain Reading (mm) 4
General Comment: Colleded CFR-TARHEEL-10-012324- partial due to equipment malfunction, CFR-TARHEEL-24-012424-no emom, and CFR-TARHEEL-20-012524- partial due to power failure
Sampling Comments:
INQ
P PARSONS

Site Name: Chemoum Fayetteville
Samplers: BRANDON WEIDNERERIN JANIGA
Data 01-30-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: Weekly River
Time: 15:05
Project Manager Tracy Ovbey
Event Type: I Sampling
S I ID
S I Data Time
Parameters
pH
DO
Redo,
Turbidity
Spec. Cond.
Temp.
Color
Odor
DAIOC
Date Time
m /L
mV
NTU
`-an
"C
CFR-TARHEEL-113024
01-30-212411:15
01-30-2024 15:10
7.46
10.43
74.10
126.00
187.78
15.81
Harytan
No
1
1
1
1
1
Samolina Data
Sampling Method: Bottle Grab
ISCO Start Date and Time:
ISCO End Data and Time:
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
57.00
Sunny
None
5
Multi Meter Used: Insitu Aqua Troll
Multi Meter ID: 706682
Latitude: 34.7449015504934
Longitude:-78.7851737918117 V
Staff Gauge Water Level Reading (ft): 11.7
Temperature Reading (degrees C): 58 GPS Location (8 collected)
Rain Reading (mm) 1
General Comment:
Sampling Comments: I Tmheel ISCO had a power tailure.tading on Saturday 112-24, No Composite samples were collectetl from 1/2T - 1/30. A grab sample was taken on 1/30. Tarheel ISCO was reset antl programmed to start Wednesday 1/31/24.
PARSONS

Slte Name: Chemoum Fayetteville
Samplers: MYTLVN MARINGERISAIRA BOHAMI
Data 1 02-02-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: 6 Weekly River
Time: 09:17
Project Manager: Tracy Ovbey
Event Type: Sampling
Sampling Data
Sampling Method: ISCO Composite
ISCO Start Date and Time: 02-01-2024 00:01
ISCO End Data and Time: 02-01-202423:01
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
44.00
Partly Sunny
None
5
Mulct Meter Used: InsiW Aqua Troll
Multi Meter ID: 766679
Latitude: 34.7452983604469
Longitude: _78.7851319472455 V
Staff Gauge Water Level Reading (ft): 7.5
Temperature Reading (degrees C): 10 GPS Location (if collected)
Rain Reading (mm) 5
General Comment: Collected CFR-TARHEEL-24-013124 and CFR-TARHEEL-24-020124; no errors
Sampling Comments:
P PARSONS

Slte Name: Chemours Fayetteville
Samplers' BRANDON WEIDNERI
Data 1 02-06-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: 6 Weekly River
Time: 13:58
Project Manager: Tmcy Ovbey
Event Type: Sampling
S I ID
S I Date Time
Parameters
H
DO
R:tl-
urbiditl
Spec. Cond.
Temp.
Color
Odor
gA/QC
Dale Time
m /L
mV
NTU
VS/cm
aC
CFR-TARHEEL-24-020524
02-05-212423:11
2-06-2024 14:06
8.51
5.44
-74.00
46.40
355.64
19.08
Cloudy
None
1
1
Sampling Data
Sampling Method: ISCO Composite
ISCO Start Date and Time: 02-05-2024 00:01
ISCO End Data and Time: 02-05-2024 23:01
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
52.00
Sunny
None
18
Multi Meter Used: InsiW Aqua Troll
MulB Meter ID: 766679
Latitude: 34.7449520939422
Longitude:-78.7851504320405 V
SIaH Gauge Water Level Reading (H): 5.5
Temperoture Reatling (degrees C(' 16 GPS Location (if collected)
Rain Reading (mm) 0
General Comment: Collected samples CFR-TARHEEL-24-020224, CFR-TARHEEL-24-020324, CFR-TARHEEL-24-020424, and CFR-TARHEEL-24-020524; No errors
Sampling Comments:
Ism setup
P PARSONS

Slte Name: Chemoum Fayetteville
Samplers' BRANDON WEIDNERI
Data 1 02-05-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: 6 Weekly River
Time: s0
Project Manager: Tracy Ovbey
Event Type: Maintenance
-�
AMR
Sampling Data
Sampling Method: L
ISCO Start Data and Time:
ISCO End Data and Time:
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
52.00
Sunny
None
15
Mulct Meter Used:
Multi Meter ID:
Latitude:
Longitude:
Staff Gauge Water Level Reading (ft): 5.5
Temperature Reading (degrees C): 15 GPS Location (if collected)
Rain Reading (mm) 0
General Comment: Replaced solar panel and redid all wiring
Sampling Comments:
Broken solar panel, replaced with — new ones
P PARSONS

Slte Name: Chemou a Fayetteville
Samplers: BEBORAH AVERSISAIRA BOHAMI
Data 1 02-09-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: Weekly River
Time: 09:19
Project Manager: Tmcy Ovbey
Event Type: Sampling
S I ID
S I Date Time
Pammelenc
H
DO
Retlox
urbiditl
Spec. Cond.
Temp.
Color
Odor
gA/QC
Dale Time
nn/L
mV
NTU
VS/cm
aC
CFR-TARHEEL-24-120824
02-08-212423:11
2-09-2024 09:21
1.99
9.68
-19.40
40.30
462.57
10.84
Clear
No
1
1
1
Sampling Data
Sampling Method: ISCO Composite
ISCO Start Date and Time: 02-08-2024 00:01
ISCO End Data and Time: 02-08-2024 23:01
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
45.00
Cloudy
None
3
Multi Meter Used: InsiW Aqua Troll
Muld Meter ID: 706682
Latitude: 34.7454527247047
Longitude:-78.7850851666478 Q`
SIaH Gauge Water Level Reading (%): 3 - r
Temperoture Reatling (degrees C): 8 GPS Location (if collected)
Rain Reading (mm) 0
General Comment: Collected CFR-TARHEEL-24-020624, CFR-TARHEEL-24.020724, and CFR-TARHEEL-24-020824; DEC, set to run on 2/12/24
Sampling Comments: Recallbraletl (initial grab gave 200ml- instead of 100mL)
P PARSONS

Site Name: Chemours Fayetteville
Samplers: DEBORAH AVERSHERBERT WATTS
Data 02-13-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event Weekly River
Time: 0905
Project Manager: Tracy Ovbey
Event Type: Sampling
-------------
Sampling Data
Sampling Methotl: ISCO Composite
ISCO Start Date and Time: 02-12-2024 00:01
ISCO End Data and Tme: 02-12-2024 23:01
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind(mph)
54.00
Sunny
None
21
Multi Meter Used: Insilu Aqua Troll
Multi Meter ID. 706662
Latitude: 34.7450309115617
Longitude:-78.785120270037 9
Staff Gauge We., Level Reading m): 2.5
Temperature Reading (degrees C): 13 GPS Location (if collected)
Rain Reading (mm) 32
General Comment'. Collected CFR-TARHEEL-24-020924, CFR-TARHEEL-24-021024, CFR-TARHEEL-24-.21124, and CFR-TARHEEL-24-021224; no errors; picked up 2112 DEC -no errors
Sampling Comments: Grab gave 75mL instead of 100mL; did not recalibrale, will check again -e pickup
ISCO setup
p Pkil

Site Name: Chemours Fayetteville
Samplers: DEBORAH AYERSSAIRA BOHAM
Data 02-28-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: Weekly River
Time: 09:09
Project Manager Tracy O.ey
Event Type:
-------------
Sampling Data
Sampling Method: ISCO Composite
ISCO Start Data and Time: 02-19-2024 00:01
ISCO End Data and Time: 02-19-2024 23:01
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (rl
58.00
Cloudy
Rain
17
Staggauge
Multi Meter Used: Im lu Aqua Troll
Multi Meter ID: 766679
Latitude: 34.7454059408322
Longitude:-78.7850870649367 V
Staff Gauge Water Level Reading (ft): 2.5
Temperature Reading (degrees C): 14 GPS Location (If collected)
Rain Reading (mot 0
General Comment: Collected CFR-TARHEEL-24-021924, CFR-TARHEEL-24-022024, CFR-TARHEEL-24-022124, CFR-TARHEEL-24-022224; no errors
Sampling Comments:
PARSONS

Site Name: Chemou s Fayetteville
Samplers: DEBORAH AVERS SAIRA BOHAM
Data 02-23-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: Weekly River
Time: 09:09
Project Manager:
Event Type:
Sampling Data
Sampling Method. ISCO Composite
ISCO Start Date and Time: 02-22-2024 00:01
ISCO End Data and Time: 02-22-202423:01
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
58.00
Cloudy
Rain
17
Staff gauge
Mulb Meter Used: InsiW Aqua Troll
Molt Meter ID: 766679
Latitude; 347454059408322
Longitude:-78.7850870649367 V
Staff Gauge Water Level Reading (ff): 2.5
Temperature Reading (degrees C): 14 GPS Location (if collected)
Rain Reading (mm) 0
General Comment: Collected CFR-TARHEEL-24-021924, CFR-TARHEEL-24-022024, CFR-TARHEEL-24-022124, CFR-TARHEEL-24-022224; no errors
Sampling Comments:
P PARSONS

Site Name: Chemoum Fayetteville
Samplers: BRANDON WEIDNERBROCK SHATTUCKFELIPE SILVA
Data 02-27-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: Weekly River
Time: 11:25
Project Manager: Tracy Ovbey
Event Type: Sampling
S I ID
S I Date Time
Parameters
pH
DO
Redo,
Turbidity
Spec. Carat.
Temp.
Color
Odor
gA/DC
Date Time
m IL
mV
NTU
P--rh
"C
CFR-TARHEEL-24-022624
1 02-26-212423:01
1 02-27-2024 11:30
8.30
8.78
20.00
1 15.90
1 382.36
14.78
1 Clear
No
Samalina Data
Sampling Method: ISCO Composite
ISCO Start Date and Time: 02-26-2024 00:01
ISCO End Data and Time: 02-26-2024 23:01
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
63.00
Cloudy
Rain
13
Multi Meter Used: Insitu Aqua Troll
Multi Meter ID: 706720
Latitude: 34.7449801024374
Longitude:-78.7851853855688 91
Staff Gauge Water Level Reading (ff): 1.8
Temperature Reading (degrees C): 17 GPS Location (if collected)
Rain Reading (mm) 3
General Comment: Recalibmted volume for ISCO; collected CFR-TARHEEL-24-022324, CFR-TARHEEL-24-022424, CFR-TARHEEL-24-022524, and CFR-TARHEEL-24-022624; no errors
Sampling Comments:
p PARSONS

Slte Name: Chemoum Fayetteville
Samplers: BRANDON WEIDNERSAIRA BOHAM
Date. 02-28-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: Weekly River
Time: 09:03
Project Manager Tmcy Ovbey
Event Type: Maintenance
��
jai
�aai
Semolina Data
Sampling Method:
ISCO Start Date end Time:
ISCO End Dale end Time:
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
63.00
Partly Cloudy
None
15
Mulb Meter Used:
MuIB Meter ID:
Latitude: M.7449440012583 ` 7
Longitude:-78.785160362734 �r
Sla%Gauge Water Level Reading (%): 2
Tempemture Reeding (degrees C): 13 GPS Location (if collected)
Rain Reatling (mm) 0
General Comment: ISCO not pulling enough water- mcalibratetl 01-1
Sampling Comments:
SCO setup
P PARSONS

Slte Name: Chemours Fayetteville
Samplers: FELIPE SILVAISAIRA BOHAMI
Date. 03-01-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: Weekly River
Time: 09:43
Project Manager: Tmcy Ovbey
Event Type: Sampling
$ I ID
S I Data Time
Parameters
pH
DO
Retlox
Turbid
Spec. Canal.
Temp.
Color
Odor
DAIQC
Date Time
MOIL
mV
NTU
pScm
oC
CFR-TARHEEL-14-022924
02-29-212423:11
03-01-2024 09:50
8.40
7.74
-11.10
13.10
1 320.53
14.19
1 Clear
No
Sampling Data
Sampling Method: ISCO Composite
ISCO Start Date and Time: 02-29-2024 00:01
ISCO End Data and Time: 02-29-2024 23:01
WEATHER CONDITIONS
Temperature (F).
Sky:
Precipitation:
Wind (mph)
49.00
Partly Sunny
None
6
Staff Gauge
Multi Meter Used: Insilu Aqua Troll
Multi Meter ID: ]O6]20
Latitude; 34,744818823587 '!
Longitude:-78.7874793993961 V
2 SIaHmpeGaugmtue rWatereatlinLevg (eldReading (%): ..
Tee RegreeC22 s ): P. Location (if collected)
Rain Reading (mm) 9
General Comment: Collected CFR-TARHEEL-24-022724, CFR-TARHEEL-24-022824, and CFR-TARHEEL-24-022924; no emors
Sampling Comments:
Setup
PPARSONS

Site Name: Chemours Fayetteville
Samplers: FELIPE SILVA KEN STUART
Data 03-OS-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: Weekly River
Tlme: 11:41
Project Manager: Tracy Ovbey
Event Type: Sampling
-------------
Sampling Data
Sampling Method: ISCO Composite
ISCO Start Data and Time: 03-04-2024 00:01
ISCO End Date and Tlme: 03-04-2024 23:01
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
66.00
Sunny
None
0
Multi Meter Used: Insitu Aqua Troll
M.Ib Meter ID: F 706720
Latitude: 34.7449732
Longitude: _78,7851937 IF
Staff Gauge Water Level Reading (ft): 7.6
Temperature Reading (degrees Ck Im CPS Location (if collected)
Rain Reading (mm) 20
General Cammenl: Collected CFR-TARHEEL-24-030424, CFR-TARHEEL-24-030324, CFR-TARHEEL-24-030224, and CFR-TARHEEL-24-030124; no errors
Sampling Comments:
p PAi

Site Na.,: Chemours Fayatleville
Samplers: FELIPE SILVA KEN STUART
Data 03-OS-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event Weekly River
The: 10:38
Project Manager: Tracy Ovbey
Event Type: Sampling
-------------
Samelinp Data
Sampling Method: Bailer
ISCO Start Data and Ti... _
ISCO End Data and Time:
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind(mph)
59.00
Sunny
None
9
Mull, Meter U.,al 7 nsitu Aqua Tmll
Multi Meter ID: 706720
Latitude: 34,7449614888883
Longitude:-78.7851932644844 V-
Staff Gauge Water Level Reading (ff): 8.5
TempereWre Reading (degrees C): 21 GPS Location (ff collected)
Rain Reading (mm) 1 32.5
General Comment Collected CFR-TARHEEL-24-030524, CFR-TARHEEL-24-030624, CFR-TARHEEL-24-030724 and partial sample CFR-TARHEEL-10-030824 sample time 0901 and a grab CFR-TARHEEL-030824 ® 1010; no errors; pulled ISCO due
to possible flooding
Sampling Comments:
StaRgauge
0j PARSONS

Site Name: Chemours Fayatleville
Samplers: BROCK SHATTUCKERIN JANIGAKEN STUART
Data 03-13-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event 77 Weekly River
Time: 09:50
Project Manager Tracy Ovbey
Event Type: Sampling
-------------
S.—Imo Data
Sampling Method: ISCO Composite
ISCO Start Date and Time: 03-12-2024 00:15
ISCO End Data and Time: 03-12-2024 23:15
WEATHER CONDITIONS
Temperature (F).
Sky:
Precipitation:
Wind (mph)
56,00
Sunny
None
5
Multi Meter J.ad:
Multi Meter ID:
Latltude: 34.7449647121382
Longitude:-78.7851802341613
Stag Gauge Wale, Level Reading (ft): 8
Temperature Reading (degrees C): 19 GPS Location (if collected)
Rain Reading hum) 0
General Comment: Picked up OAIOC sample
Sampling Comments:
P PARSOM

Site Name: Chemours Fayeft—lle
Samplers: SAIRA BOHAM TIM SMITH
Data 03-15-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event Weekly River
Time: 09:32
Project Manager Tracy Ovbey
Event Type: Sampling
Sampling Data
Sampling Methotl: ISCO Composite
ISCO Start Data and Time: 03-14-2024 00:01
ISCO End Data and Time: 03 142024 23:01
WEATHER CONDITIONS
Temperature (F):
Sky:
Procipi.tlon:
Wind(mph)
62.00
Sunny
None
9
Multi Meter Usetl: Insitu Aqua Troll
Multi Meter ID: 706720
Latitude: 34,7449283203166
Longitude: _78.7851028542682 V
Stag Gauge Water Level Reading (ft): 7 '
Temperature Reading (degrees C): 24 GPS Location (if collected)
Rain Reading (mm) 0
General Comment: Collected CFR-TARHEEL-24-031224, CFR-TARHEEL-24-031324, and CFR-TARHEEL-24-031424 ; no errors
Sampling Comments:
Q
p PARS m

Site Name: Chemours Fayetteville
Samplers: GRANT WALLACE SAIRA BOHAM TIM SMITH
Data 03-1&2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: Weekly River
Time: 09:35
Project Manager Tracy Ovbey
Event Type:
$ I ID
S I Data Time
Parameters
H
DO
Redoz
1 Turbid
Spec. Cord.
Temp.
Color
Odor
DAIOC
Date Time
m /L
my
NTII
pS/cm
"C
CFR-TARHEEL-14-031124
03-18-101423:11
3-19-2024 09:40
1.22
8.38
88.30
25.20
887.83
11.79
Clear
No
1
1 1
1
1
1
1
1
1
Semolina Data
Sampling Method: ISCO Composite
ISCO Start Data and Time: 03-18-2024 00:01
ISCO End Data and Time: 03-18-202423:01
WEATHER CONDITIONS
Temperature (F).
Sky:
Precipitation:
Wind (mph)
40.00
Partly Sunny
None
8
ON
Multi Meter Used: Insitu Aqua Troll
Multi Meter ID: F 706720
Latitude: 34.7449332980918
Longitude:-78.7851680359539 V
Staff Gauge Water Level Reading (ft): 3
Temperature Reading (degrees C): 8 GPS Location ('rf collepetl)
Rain Reading (mm) 0
General Comment Collected CFR-TARHEEL-24-031524, CFR-TARHEEL-24-031624, CFR-TARHEEL-24-031724, and CFR-TARHEEL-24-031824; no an,
Sampling Comments:
ISCO shed
P PARSONS

Site Name: Chemoms Fayetteville
Samplers: HERBERT WATTSSAIRA BOHAM
Data 03-22-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: Weekly River
Time: 09:05
Project Manager: Tmcy Ovbey
Event Type: Sampling
S I ID
S I Date Time
Parameters
pH
DO
Retlox
Turbitlity
Spec. Conti.
Temp.
Color
Odor
gA/QC
Date Tlme
mull-
mV
NTU
p5/cm
aC
CFR-TARHEEL-24-032124
03-21-202A 23:01
03-22-2024 09:12
7.23
9.65
36.40
15.40
155.55
13.98
Clear
No
1
1
1
1
Semolina Data
Sampling Method. ISCO Composite
ISCO Start Data and Time: 03-21-2024 00:01
ISCO End Data and Time: 03-21-2024 23:01
WEATHER CONDMONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
52.00
Partly Cloudy
None
3
Multi Meter Used: InsiW Aqua Troll
Multi Meter ID: 706720
Latitude: 34.7449529704799
Longitude:-78.7851468728466 V
Staff Gauge Water Level Reading (tt): 2
Temperature Reading (degrees C): 12 GPS Location (if collected)
Rain Reading (mm) 0
General Comment: Collected CFR-TARHEEL-24-031924, CFR-TARHEEL-24 032024, and CFR-TARHEEL-24-032124; no.—.; re..libmted grab volume
Sampling Comments:
i
P PARSONS

Site Name: Chemou s Fayetteville
Samplers: DRANDON WEIDNERGRANT WALLACE
Date: 03-26-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: Weekly River
Time: 11:39
Project Manager:
Event Type: Sam II
$ 1 ID
S I Date Time
Parameters
pH
DO
Ratlox
Turbid
Spec. Cord.
Temp.
Color
Odor
gA/QC
Date Time
m L
mV
NTU
pS/cm
"C
CFR-TARHEEL-24-032524
1 03-25-202A 23:01
03-26-2024 11:41
6.84
9.49
144.80
13.00
113.99
16.23
1 Clear
No
Si molinc Data
Sampling Method. ISCO Composite
ISCO Start Date and Time: 03-25-2024 00:01
ISCO End Data and Time: 03-25-2024 23:01
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
57.00
Sunny
None
q
Staff gauge
Mulct Meter Used: Insitu Aqua Troll
Multi Meter ID: 706720
Latitude: 34.7449496533968
Longitude:-78.7852356379349 V'
Staff Gauge Water Level Reading (ft): 3
Temperature Reading (degrees C): 22 GPS Location (if collected)
Rain Reading (mm) 11
General Comment: Colleded CFR-TARHEEL-24-032224, CFR-TARHEEL-24-032323, CFR-TARHEEL-24-032424, and CFR-TARHEEL-24-032524; no errs
Sampling Comments: Ants found nesting in DEO ISCO, removed them and sprayed shack
shed sprayed for ants
P PARSONS

Site Name: Chemoum Fayetteville
Samplers: DEBORAH AYERSSAIRA BOHAM
Data 03-29-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: Weekly River
Time: 09:41
Project Manager:
Event Type:
-------------
Samolino Data
Sampling Method: ISCO Composite
ISCO Start Dale and Time: 03-28-2024 00:01
ISCO End Data and Time: 03-28-202423:01
WEATHER CONDITIONS
Temperature (F).
Sky:
Precipitation:
Wind (mph)
46.00
Sunny
None
7
Muth Meter Used: Insilu Aqua Troll
Multi Meter ID: ]O6]20
Latitude: 34.7454226263294
Longitude:-78.7850914299671 V
Staff Gauge Water Level Reading (ft): 11.8
Temperature Reading (degrees C): 20 GPS Location (if collected)
Rain Reading (mm) 22
General Comment: Collected 1TR-TAR1EEL-24-032624, CFR-TARHEEL-24-032724, 17R-TARHEEL-24-032824 antl padial 17R-TARIiEE111-032924 and grab for CIFR-TARHEEL-032924 at 0955; no errors
Sampling Comments: Pulled ISCOs due to rising River
ISCOa before removal
PPARSONS

Site Name: Chemoum Fayetteville
Samplers: KEN STUARTISAIRA BOHAM
Date: 01-24-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-BLADEN
Sampling Event: Quarterly CAP
Time: 1g;gp
Project Manager: Tracy Ovbey
Event Type: Sampling
S I ID
S I Data Time
H DO
Redo.
Turbid'
Speo. Cond.
Tamp.
Color
Odor
QAIQC
m /L
my
NTU
pS/cm
aC
CAP1Q24-CFR-
BLADEN-012424
01-24-202413:50
11.37
53.30
35.40
238.05
14.37
Clear
No
—
Sampling Data
Sampling Method:rump urar, —
Sampling Location: Thatweg
Total Depth to Bottom of Channel (ft): 22.5
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind(mph)
70.00
Partly Cloudy
None
8
Right
Tubing Depth (ft): 11.25 Distance to River Right: 41
Will Meter Used: Insitu Aqua Troll Distance to River Left: 43
Will Meter ID: 706682 Distance to River (Right/Left) Units: 0
Latitude: 34.7720648750113
Longitude:-78.7979368877799
I
GPS Location (9 collected)
General Comments:
Sample Commems:
B
PAR5Of115

Site Name: Chemours Fayetteville
Samplers: DEBORAH AVERS FELIPE SILV
Dale: 01-25-2024
SURFACE WATER SAMPLING RECORD
Location ID:
CFR-KINGS
Sampling Event:
Quarterly CAP
Time:
58
Project Manager: Tracy Ovbey
Event Type: Sampling
S I ID
S I Dale Time
p.
DO
Redo.
Turbidih
Spa.. Cond.
Tamp.
Color
Odor
QNQC
m /L
mV
NTU
PS/cm
aC
CAPiQ24-CFR-
KINGS-012524
01-25-202412:07
7.97
10.52
46.50
X20
180.17
15.80
Cloudy
No
—
Sampling Data
Sampling Method: Per! Pump Grab
Sampling Location: Thalweg
Total Depth to Bottom of Channel (ft): 20.6
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
72.00
Cloudy
Rain
11
Tubing Depth (ft): 10 Distance to River Right: 59
Multi Meter Used: Insitu Aqua Troll Distance to River Left: 42
Multi Meter ID: 706682 Distance to River (Right/Left) Units: 0
Latitude: -78,29 57126 909
144
Longitude:-78.2945712681445
CPS Location (if collected)
General Comments:
Sample Comments:
0

Site Name: Chemours Fayetteville
Samplers: KEN STUARTISAIRA BOHAM
Date: 01-24-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-RM-76
Sampling Event: Quarterly CAP
Time: pg;pi
Project Manager: Tracy Ovbey
Event Type: Sampling
S I ID
S I Data Time
PH
DO
Redox
Tubidit,
Spec. Cond.
Temp.
Color
Odor
OA/OC
m /L
mV
NTU
pS/cm
C
CAP1Q24-CFR-RM-
76-012424
01-24-202409:15
T49
6.90
110.60
33.20
628.60
8.93
Clear
No
--
Sampling Data
Sampling Method: Peri Pump Grab
Sampling Location: Thatweg
Total Depth to Bottom of Channel (ft): 26
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind(mph)
52.00
Partly Cloudy
None
6
General Comments:
Sample Commems:
w
Tubing Depth (ft): 13
Multi Meter Used: Instlu Aqua Troll
Mull! Meter ID: 706682
34.8534149188811
-78.8270908565009
Distance to River Right: 24
Distance to River Left: 61
Distance to River (Right/Left) Units: 0
""11 -- ( -
GPS Location (if collected)
PAR5Of115

Site Name: Chemours Fayetteville
Samplers: BRANDON WEIDNERDESORAHAVERSJacobK
Dale: 01-24-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: Quarterly CAP
Time: 13:45
Project Manager: Tracy Ovbey
Event Type: Sampling
S I ID
S I Date
Time
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
QA/QC
m /L
my
NTU
PS/cm
"C
CAP1024-CFR-TARHEEL-24
012524
01-25-202410:24
7.54
9.80
118.80
39.20
126.47
14.M
Cloudy
No
—
Sampling Data
Sampling Method: ISCO Composite
ISCO Start Date and Time: 01-24-2024 11:24
ISCO End Date and Time: 01-25-2024 10:24
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
70.00
Cloudy
None
12
Multi Meter Used: Insitu Aqua Troll
Multi Meter ID: 706720
Latitude: 34.7449602370951 '
Longitude:-78.7851794738437 0'
GPS Location (if collected)
General Comments:
Sample Comments:
P PARSONS

Site Name: Chemours Fayetteville
Samplers: KEN STUART SAIRA BOHAM
Dale: 01-24-2024
SURFACE WATER SAMPLING RECORD
Location ID: CFR-TARHEEL
Sampling Event: Quarterly CAP
Time: 14:00
Project Manager: Tracy Ovbey
Event Type: Sampling
S I ID
S I Date
Time
pH
DO
Red-
Turbidity
Spec. Cond.
Temp.
Color
Odor
QA/QC
m /L
my
NTU
PS/cm
C
CAP7Q24-CFR-TARHEEL-
012424
01-24-202414:10
7.23
10.86
79.70
64.00
153.74
13.34
Murky
None
—
Sampling Data
Sampling Method: Pan Pump Grab
Water Quality Condition: Clear
34.7439013866
-78.784591341:
General Comments:
Sampling Comments:
Multi Meter Used: Insitu Aqua Troll Flow Rate:
Multi Meter ID: 706682 Flow Rate Units:
P PARSONS

Site Name: Chemours Fayetteville
Samplers: BRANDON WEIDNERDEBORAHAVERSJacobK
Date: 01-24-2024
SURFACE WATER SAMPLING RECORD
Location ID: GBC-5
Sampling Event: Quarterly CAP
Time: 12:06
Project Manager: Tracy Ovbey
Event Type: Sampling
S I ID
S I Date
Time
pH
DO
Red-
Turbidity
Spec. Cond.
Temp.
Color
Odor
QA/QC
m /L
my
NTU
PS/cm
C
CAP7Q24-GBC-5-012424
01-24-202412:10
6.29
9.73
78.50
2.68
134.88
18.82
Clear
None
—
Sampling Data
Sampling Method: Bottle Grab
Water Quality Condition: Clear
34.8160917289
-78.83248991&
General Comments:
Sampling Comments:
Multi Meter Used: Insitu Aqua Troll Flow Rate:
Multi Meter ID: 706720 Flow Rate Units:
P PARSONS

Site Name: Chemours Fayetteville
Samplers: FELIPE SILVAKEN STUARTSAIRA BOHAM
Dale: 01-24-2024
SURFACE WATER SAMPLING RECORD
Location ID: Lock -Dam North
Sampling Event: Quarterly CAP
Time: 12:00
Project Manager: Tracy Ovbey
Event Type: Sampling
S I ID
S I Date
Time
pH
DO
Red-
Turbidity
Spec. Cond.
Temp.
Color
Odor
QA/QC
m /L
mV
NTU
PS/cm
C
CAP1Q24-LOCK-DAM-
NORTH-012424
Sampling Data
Sampling Method:
Water Quality Condition:
WEATHER CONDITIONS Latitude:
Temperature IF):rNone
.00 Longitude:
Sky:
Precipitation:
Wind (mph) 6
No north seep
34.8339452
-78.8237191
Multi Meter Used:
Multi Meter ID:
General Comments: No north seep and no sample
Sampling Comments: No north seep and no sample
Flow Rate: L__AM
Flow Rate Units:
GPS Location (if collected)
P PARSONS

SURFACE WATER SAMPLING RECORD
Site Name: Chemours Fayetteville Location ID: Lock -Dam Seep Project Manager: Tracy Ovbey
Samplers: FELIPE SILVAKEN STUARTSAIRA BOHAMI Sampling Event: Quarterly CAP Event Type: Sampling
Dale: 01-24-2024 Time: 7 11:55
S I ID
S I Date
Time
pH
DO
Red-
Turbidity
Spec. Cond.
Temp.
Color
Odor
QA/QC
m /L
mV
NTU
PS/cm
C
CAPi Q24-LOCK-DAM-SEEP
012424
01-24-202412:15
6.66
6.51
203.00
21.60
472.13
16.10
Clear
None
DUPMSMSD
Sampling Data
Sampling Method: Bottle Grab
Water Quality Condition: Clear
WEATHER CONDITIONS Latitude:
Temperature (F): F�l
00 Longitude:
Sky: udy
Precipitation: ne
Wind (mph) 6
Seep coming out of trees
34.8339048
-78.8237419
Multi Meter Used: Insitu Aqua Troll Flow Rate: 1 11.7
Multi Meter ID: 706682 Flow Rate Units: 9Prn
General Comments: Seep moved away from boat ramp
Sampling Comments:
P PARSONS

Site Name: Chemours Fayetteville
Samplers: BRANDON WEIDNERDEBORAHAVERSJacobK
Dale: 01-24-2024
SURFACE WATER SAMPLING RECORD
Location ID: 0LDOF-1B
Sampling Event: Quarterly CAP
Time: 10:48
Project Manager: Tracy Ovbey
Event Type: Sampling
S I ID
S I Date
Time
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
QA/QC
m /L
my
NTU
PS/cm
"C
CAP7 Q24-OLDOF-1B-24-
012524
01-25-202407:36
8.08
8.43
4.90
5.21
290.47
17.59
Clear
No
—
Sampling Data
Sampling Method: ISCO Composite
ISCO Start Date and Time: 01-24-2024 08:36
ISCO End Date and Time: 01-25-2024 07:36
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
60.00
Partly Cloudy
None
9
Multi Meter Used: Insitu Aqua Troll
Multi Meter ID: 1 706720
Latitude: 34.8330022391544
Longitude:-78.824949962535 G
GPS Location (if collected)
General Comments:
Sample Comments:
P PARSONS

Site Name: Chemours Fayetteville
Samplers: BRANDON WEIDNERDESORAHAVERSJacobK
Dale: 01-24-2024
SURFACE WATER SAMPLING RECORD
Location ID: OUTFACE 002
Sampling Event: Quarterly CAP
Time: 09:53
Project Manager: Tracy Ovbey
Event Type: Sampling
S I ID
S I Date
Time
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
QA/QC
m /L
my
NTU
PS/cm
"C
CAP70,24-OUTFALL-002-24-
012524
01-25-202407:24
7.89
9.43
78.50
29.70
178.97
14.49
Clear
No
—
Sampling Data
Sampling Method: ISCO Composite
ISCO Start Date and Time: 01-24-2024 08:24
ISCO End Date and Time: 01-25-2024 07:24
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
55.00
Cloudy
None
6
Multi Meter Used: Insitu Aqua Troll
Multi Meter ID: 1 706720
Latitude: 34.8383271218206
Longitude:-78.8286765098171 V
GPS Location (if collected)
General Comments:
Sample Comments:
P PARSONS

Site Name:
Chemours Fayetteville
Samplers:
BRANDON WEIDNERDESORAH AVERS
Dale:
01-24-2024
SURFACE WATER SAMPLING RECORD
Location ID: RIVER WATER INTAKE2
Sampling Event: Quarterly CAP
Time: 09:34
Project Manager: Tracy Ovbey
Event Type: Sampling
S I ID
S I Date
Time
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
QA/QC
m /L
mV
NTU
pS/cm
"C
RIVER-WATER-INTAKE2-24-
012524
01-25-202407:06
7.87
9.50
54.00
34.40
184.05
13.92
Clear
No
—
Sampling Data
Sampling Method: ISCO Composite
ISCO Start Date and Time: 01-24-2024 08:06
ISCO End Date and Time: 01-25-2024 07:06
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
56.00
Cloudy
None
8
Multi Meter Used: Insitu Aqua Troll
Multi Meter ID: 1 706720
Latitude: 34.8435300090369
Longitude:-78.8354740227633 9 p
GPS Location (if collected)
General Comments:
Sample Comments:
P PARSONS

Site Name: Chemours Fayetteville
Samplers: BRANDON WEIDNERDESORAHAVERSJacobK
Dale: 01-24-2024
SURFACE WATER SAMPLING RECORD
Location ID: SEEP -A
Sampling Event: Quarterly CAP
Time: 09:07
Project Manager: Tracy Ovbey
Event Type: Sampling
S I ID
S I Date
Time
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
OA/OC
m /L
my
NTU
PS/cm
"C
CAP1024-SEEP-A-EFF-24-
012524
01-25-2024 07:12
7.38
9.10
99.50
3.46
387.12
9.10
Clear
No
Sampling Data
Sampling Method: ISCO Composite
ISCO Start Date and Time: 01-24-2024 08:12
ISCO End Date and Time: 01-25-2024 07:12
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
57.00
Cloudy
None
3
Multi Meter Used: Insitu Aqua Troll
Multi Meter ID: 1 706720
Latitude: 34.8452268530935
Longitude:-78.8252823936303
GPS Location (if collected)
General Comments:
Sample Comments:
P PARSONS

Site Name: Chemours Fayetteville
Samplers: BRANDON WEIDNERDEBORAHAVERSJacobK
Dale: 1/25/2024
SURFACE WATER SAMPLING RECORD
Location ID: SEEP-B
Sampling Event: Quarterly CAP
Time: 9:36
Project Manager: Tracy Ovbey
Event Type: Sampling
S I ID
S I Date
Time
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
OA/OC
m /L
my
NTU
PS/cm
"C
CAP7O24-SEEP-B-EFF-24-
012624
1/26/20248:47
8.22
8.59
94.80
40.80
159.80
12.43
Clear
No
Sampling Data
Sampling Method: ISCO Composite
ISCO Start Date and Time: 1/25/2024 9:47
ISCO End Date and Time: 1/26/2024 8:47
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
55.00
Partly Cloudy
None
6
Multi Meter Used: Insitu Aqua Troll
Multi Meter ID: 1 706720
Latitude: 34.8423235103187
Longitude:-78.8250849248054 V
GPS Location (if collected)
General Comments:
Sample Comments:
P PARSONS

Site Name: Chemours Fayetteville
Samplers: BRANDON WEIDNERDESORAHAVERSJacobK
Dale: 01-24-2024
SURFACE WATER SAMPLING RECORD
Location ID: SEEP-C
Sampling Event: Quarterly CAP
Time: 08:24
Project Manager: Tracy Ovbey
Event Type: Sampling
S I ID
S I Date
Time
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
QA/QC
m /L
my
NTU
PS/cm
"C
CAP1Q24-SEEP-C-EFF-24-
012524
01-25-202407:24
8.06
6.53
104.00
9.01
268.34
13.73
Clear
No
—
Sampling Data
Sampling Method: ISCO Composite
ISCO Start Date and Time: 01-24-2024 08:24
ISCO End Date and Time: 01-25-2024 07:24
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
60.00
Partly Cloudy
None
9
Multi Meter Used: Insitu Aqua Troll
Multi Meter ID: 706720
Latitude: 34.8383929953947
Longitude:-78.8244865065019 t
GPS Location (if collected)
General Comments:
Sample Comments:
P PARSONS

Site Name: Chemours Fayetteville
Samplers: BRANDON WEIDNERDESORAHAVERSJacobK
Dale: 1/25/2024
SURFACE WATER SAMPLING RECORD
Location ID: SEEP-D
Sampling Event: Quarterly CAP
Time: 9:25
Project Manager: Tracy Ovbey
Event Type: Sampling
S I ID
S I Date
Time
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
QA/QC
m /L
my
NTU
PS/cm
"C
CAP1Q24-SEEP-D-EFF-24-
012624
1/26120248:30
8.21
8.47
114.80
10.80
135.68
10.91
Clear
No
Sampling Data
Sampling Method: ISCO Composite
ISCO Start Date and Time: 1/25/2024 9:30
ISCO End Date and Time: 1/26/2024 8:30
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
60.00
Partly Cloudy
None
9
Multi Meter Used: Insitu Aqua Troll
Multi Meter ID: 706720
Latitude: 34.8367616315465
Longitude:-78.8243892235815 0
GPS Location (if collected)
General Comments:
Sample Comments:
k,
P PARSONS

Site Name:
Chemours Fayetteville
Samplers:
BRANDON WEIDNERDESORAH AVERS
Dale:
01-24-2024
SURFACE WATER SAMPLING RECORD
Location ID: WC-6
Sampling Event: Quarterly CAP
Time: 07:50
Project Manager: Tracy Ovbey
Event Type: Sampling
S I ID
S I Data
1 Time
PH
DO
Redo.
Turbidi
Spec. Cond.
Temp.
Color
Odor
OA/QC
m /L
mV
NTU
pS/cm
"C
CAP1 Q24-WC-6-24-012524
01-25-202407:00
5.54
9.59
30.40
4.52
196.99
10.31
Clear
No
—
Sampling Data
Sampling Method: ISCO Composite
ISCO Start Date and Time: 01-24-2024 08:00
ISCO End Date and Time: 01-25-2024 07:00
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
53.00
Cloudy
None
5
Multi Meter Used: Insitu Aqua Troll
Multi Meter ID: 706720
Latitude: 34.8540956256956
Longitude:-78.8297805388092 Q
-PS Location (if collected)
General Comments:
Sample Comments:
P PARSONS

RECORD OF WELL SAMPLING
Site Name: Chemours Fayetteville Well ID: BLADEN-1DR
Samplers: FELIPE SILVAISAIRA BOHAM Event: Quarterly CAP
Purging Data Pump Depth: 40
Pump Loc: within screen
Method: Peristaltic Pump Date: 01-15-2024 Time: 09:05
Well Diameter: Inches
Project Manager: Tracy Ovbey
WATER VOLUME CALCULATION
_ (Total Depth of Well - Depth To Water ) x Casing Volume per Foot
Water Volume =
4.491
Initial Depth to Water (ft.):
77 19.4 Depth to Well Bottom (ft.): 47.47
Time
DTW
Pump Rate
Vol.
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
Comments
24 hr
ft
mL/min
mL
pH units
mg/L
mV
NTIJ
PS/cm
°C
09:40
20.16
340.00
3400.00
5.65
0.19
33.10
22.60
69.81
17.17
Clear
Yes
09:45
19.97
340.00
1700.00
5.73
0.12
21.20
19.40
70.01
16.54
Clear
Yes
0950
19.94
340.00
1700.00
5.74
0.07
20.90
20.50
70.73
16.66
Clear
Yes
09:55
19.90
340.00
1700.00
5.75
0.07
22.00
16.90
70.22
16.62
Clear
Yes
10:00
19.91
340.00
1700.00
5.76
0.05
21.20
12.70
69.55
16.84
Clear
Yes
10:05
19.94
340.00
1700.00
5.73
0.04
23.00
9.73
69.31
17.00
Clear
Yes
1010
19.95
340.00
1700.00
5.72
0.03
25.20
7.81
69.25
16.93
Clear
Yes
10:15
19.95
340.00
1700.00
5.71
0.03
26.90
7.38
69.20
16.76
Clear
Yes
10:20
19.95
340.00
1700.00
5.7
0.02
27.70
6.32
68.93
17.12
Clear
Yes
10:25
19.95
340.00
1700.00
5.71
0.02
28.50
5.041
68.87
17.17
Clear
Yes
Screen Interval:
Sampling Data
Method: I Low Flow
Field Filtered: No
Field Parameters
STABILIZED PARAMETERS
pH
5.71
Spec. Cond.(pS/cm)
68.87
Turbidity (NTIJ)
5.04
Temp.(°C)
17.17
DO (mg/L)
0.02
ORP (mV)
28.50
Date: 01-15-2024 Time: 10:25
Sample ID: CAP1Q24-BLADEN-IDR-
011524
Duplicatel D:
QA/QQ
Purge Start Time: 09:30
Total Volume Purged (mL): 18700
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
43.00
Partly Sunny
None
6
i roue -11,g
r realingeseiei w°rltl

RECORD OF WELL SAMPLING
Site Name: Chemours Fayetteville Well ID: LTW-01
Samplers: FELIPE SILVA Event: Quarterly CAP
Purging Data Pump Depth: 24
Pump Loc: within screen
Method: Peristaltic Pump I Date: 09-97-2024 Time: 12:58
Well Diameter: Inches
Project Manager: Tracy Ovbey
WATER VOLUME CALCULATION
_ (Total Depth of Well - Depth To Water) x Casing Volume per Foot
Water Volume = W 2.067
Initial Depth to Water (ft.): 1 15.83 Depth to Well Bottom (ft.): 28.75
Time
DTW
Pump Rate
Vol.
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
Comments
24 hr
ft
mL/min
mL
pH units
mg/L
mV
NTU
PS/cm
°C
13:10
16.72
240.00
1200.00
4.13
1.69
259.30
M.90
11,,,,V
14.21
Cloudy
No
13:15
16.72
240.00
1200.00
4.13
1.65
259.90
45.40
117.28
14.84
Cloudy
No
13:20
16.72
240.00
1200.00
4.13
1.60
264.90
40.70
117.27
15.08
Clear
No
13:25
16.72
240.00
1200.00
4.14
1.60
269.50
37.00
117.13
14.71
Clear
No
13:30
16.72
240.00
1200.00
4.17
1.68
271.10
22.20
116.62
14.55
Clear
No
13:35
16.72
240.00
1200.00
4.19
1.68
271.70
16.70
116.25
14.72
Clear
No
13:40
16.72
240.00
1200.00
4.21
1.69
273.20
11.60
116.19
14.92
Clear
No
Screen Interval: 1 11.0-26.0
Sampling Data
Method: I Low Flow
Field Filtered: No
Field Parameters
STABILIZED PARAMETERS
pH
4.21
Spec. Cond.(pS/cm)
116.19
Turbidity (NTU)
11.60
Temp.(°C)
14.92
DO (mg/L)
1.69
ORP (mV)
273.20
Date: 01-17-2024 Time: 1340
Sample ID: CAP1Q24-LTW-01-011724
Duplicate) D:
QA/QC:
Purge Start Time: 1 13:05
Total Volume Purged (mL):1 8400
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
1/25/1900 0:00
Sunny
None
6
i r 11,g-f
r realingeseiei worltl

RECORD OF WELL SAMPLING
Site Name: Chemours Fayetteville Well ID: LTW-02
Samplers: FELIPE SILVA Event: Quarterly CAP
Purging Data Pump Depth: 35
Pump Loc: within screen
Method: Peristaltic Pump I Date: 09-97-2024 Time: 10:54
Well Diameter: Inches
Project Manager: Tracy Ovbey
WATER VOLUME CALCULATION
_ (Total Depth of Well - Depth To Water) x Casing Volume per Foot
Water Volume = W 4.875
Initial Depth to Water (ft.): 1 10.21 Depth to Well Bottom (ft.):
Time
DTW
Pump Rate
Vol.
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
Comments
24 hr
ft
mL/min
mL
pH units
mg/L
mV
NTU
PS/cm
°C
12:10
10.32
240.00
6480.00
4.91
0.31
195.00
7.61
79.82
14.85
Clear
No
12:15
10.31
240.00
1200.00
4.95
0.17
166.00
7.42
78.55
15.59
Clear
No
12:19
10.31
240.00
960.00
4.92
0.15
160.00
4.39
82.36
15.68
Clear
No
Ap
12:25
10.32
240.00
1440.00
4.94
0.13
153.90
6.17
82.94
15.80
Clear
No
12:30
10.32
240.00
1200.00
4.94
0.11
144.50
5.65
83.33
15.75
Clear
No
12:35
10.32
240.00
1200.00
4.96
0.11
139.30
2.94
83.60
15.60
Clear
No
12:39
10.32
240.00
960.00
4.95
0.10
134.90
3.39
83.42
16.03
Clear
No
Screen Interval: 1 28.0-38.0
Sampling Data
Method: I Low Flow
Field Filtered: No
Field Parameters
STABILIZED PARAMETERS
pH
4.95
Spec. Cond.(pS/cm)
83.42
Turbidity (NTU)
3.39
Temp.(°C)
16.03
DO (mg/L)
0.10
ORP (mV)
134.90
Date: 01-17-2024 Time: 1240
Sample ID: CAP1Q24-LTW-02-011724
Duplicate) D:
QA/QC:
Purge Start Time: 1 12:05
Total Volume Purged (mL):1 13440
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
28.00
Sunny
None
6
i-11,g-f
r realingeseiei worltl

RECORD OF WELL SAMPLING
Site Name: Chemours Fayetteville Well ID: LTW-03
Samplers: ERIN JANIGA Kate maringer Event: Quarterly CAP
Purging Data Pump Depth: 25
Pump Loc: within screen
Method: Date: 01-31-2024 Time: 10:16
Well Diameter: Inches
Project Manager: Tracy Ovbey
WATER VOLUME CALCULATION
_ (Total Depth of Well - Depth To Water) x Casing Volume per Foot
Water Volume = 3.042
Initial Depth to Water (ft.): 1 13.77 Depth to Well Bottom (ft.): 32.78
Time
DTW
Pump Rate
Vol.
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
Comments
24 hr
ft
mL/min
mL
pH units
mg/L
mV
NTU
PS/cm
°C
10:35
14.17
280.00 1
1400.00
4.16
1.20
303.70
37.10
112.00
15.50
Clear
No
10:40
14.29
280.00
1400.00
4.25
0.94
296.00
19.80
109.00
15.83
Clear
No
10:45
14.25
160.00
800.00
4.31
0.70
279.10
12.20
107.00
15.71
Clear
No
10:50
14.25
160.00
800.00
4.29
0.63
280.30
17.90
106.00
15.41
Clear
No
10:55
14.25
160.00
800.00
4.31
0.57
281.20
16.40
106.00
15.29
Clear
Yes
1100
14.28
160.00
800.00
4.3
0.56
284.60
15.10
106.00
15.30
Clear
No
11:05
14.25
160.00
960.00
4.31
0.54
279.20
16.10
106.00
15.24
Clear
No
Screen Interval: 1 15.0-30.0
Sampling Data
Method: I Low Flow
Field Filtered: No
Field Parameters
STABILIZED PARAMETERS
pH
4.31
Spec. Cond.(pS/cm)
106.00
Turbidity (NTU)
16.10
Temp.(°C)
15.24
DO (mg/L)
0.54
ORP (mV)
279.20
Date: 01-31-2024 Time: 1105
Sample ID: CAP1Q24-LTW-03-013124
Duplicate) D:
QA/QC:
Purge Start Time: 1 10:30
Total Volume Purged (mL):1 6960
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
46.00
Cloudy
None
8
i r roue
r rea11,glingeseiei worltl

RECORD OF WELL SAMPLING
Site Name: Chemours Fayetteville Well ID: LTW-04
Samplers: FELIPE SILVA Event: Quarterly CAP
Purging Data Pump Depth: 20
Pump Loc: within screen
Method: Peristaltic Pump I Date: Ot-16-2024 Time: 11:02
Well Diameter: Inches
Project Manager: Tracy Ovbey
WATER VOLUME CALCULATION
_ (Total Depth of Well - Depth To Water) x Casing Volume per Foot
Water Volume = W 2.749
Initial Depth to Water (ft.): 11.31 Depth to Well Bottom ft): 28.49
Time
DTW
Pump Rate
Vol.
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
Comments
24 hr
ft
mL/min
mL
pH units
mg/L
mV
NTU
PS/cm
°C
11:25
13.13
275.00
1375.00
4
0.38
260.40
176.00
89.16
15.69
Cloudy
No
1130
14.11
275.00
1375.00
4.03
0.27
275.40
196.00
87.82
15.29
Cloudy
No
11:35
15.00
210.00
1050.00
4.05
0.32
282.40
124.00
87.05
15.45
Cloudy
No
11:40
15.11
210.00
1050.00
4.08
0.29
285.60
116.00
86.33
15.47
Cloudy
No
11:44
15.50
210.00
840.00
4.07
0.27
296.80
109.00
85.92
15.39
Cloudy
No
1149
15.65
210.00
1050.00
4.23
0.24
290.80
83.00
79.98
15.52
Cloudy
No
11:54
15.82
210.00
1050.00
4.28
0.21
284.20
67.80
77.98
15.59
Cloudy
No
12:00
15.89
200.00
1200.00
4.28
0.22
299.90
61.40
77.69
15.33
Cloudy
No
12:04
15.95
200.00
800.00
4.41
0.18
282.40
60.80
74.34
15.38
Particulates
No
1209
16.00
200.00
1000.00
4.5
0.16
272.30
40.70
73.04
15.17
Cloudy
No
12:14
16.04
200.00
1000.00
4.56
0.14
264.40
34.00
71.70
15.50
Clear
No
12:19
16.08
200.00
1000.00
4.63
0.12
256.90
31.40
70.99
15.49
Clear
No
12:23
16.13
200.00
800.00
4.67
0.12
247.30
31.70
70.91
15.77
Clear
No
12:30
16.18
200.00
1400.00
4.73
0.12
239.00
28.50
70.61
15.74
Clear
No
12:35
16.91
200.00
1000.00
4.72
0.12
236.50
26.00
70.88
16.06
Clear
No
12:40
16.26
200.00
1000.00
4.72
0.12
235.20
27.50
71.17
15.68
Clear
No
12:45
16.26
200.00
1000.00
4.71
0.12
236.00
24.10
71.36
15.78
Clearly
No
1248
16.29
200.00
600.00
4.74
0.12
231.50
21.90
71.08
15.83
Clearly
No
12:55
16.30
200.00
1400.00
4.81
0.11
224.10
20.10
70.34
16.07
Clear
No
13:00
16.32
200.00
1000.00
4.8
0.11
223.80
17.50
70.27
15.88
Clear
No
1305
16.34
200.00
1000.00
4.78
0.11
223.80
15.20
70.70
15.88
Clear
No
Sampling Data
Field Parameters
Screen Interval: 12.0-27.0
Purge Start Time: 11:22
Method: I Low Flow Date: 01-16-2024 Time: 1305 Total Volume Purged (mL): 21990
Field Filtered: No
STABILIZED PARAMETERS
pH
4.78
Spec. Cond.(pS/cm)
70.70
Turbidity (NTU)
15.20
Temp.(°C)
15.88
DO (mg/L)
0.11
ORP (mV)
223.80
Sample ID: CAP1Q24-LTW-04-011624
Duplicatel D:
QA/QQ
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
43.00
Cloudy
Rain
3
i r rcus
r rea11,glingeseier worltl

RECORD OF WELL SAMPLING
Site Name: Chemours Fayetteville Well ID: LTW-05
Samplers: FELIPE SILVAISAIRA BOHAM Event: Quarterly CAP
Purging Data Pump Depth: 30
Pump Loc: within screen
Method: Peristaltic Pump Date: 01-15-2024 Time: 10:59
Well Diameter: Inches
Project Manager: Tracy Ovbey
WATER VOLUME CALCULATION
_ (Total Depth of Well - Depth To Water ) x Casing Volume per Foot
Water Volume =
5.994
Initial Depth to Water (ft.):
9.81 Depth to Well Bottom (ft.): 47.27
Time
DTW
Pump Rate
Vol.
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
Comments
24 hr
ft
mL/min
mL
pH units
mg/L
mV
NTIJ
PS/cm
°C
11:30
10.00
360.00
3240.00
4.43
0.10
225.00
16.80
130.97
17.64
Clear
Yes
11:35
10.00
360.00
1800.00
4.43
0.04
219.80
18.40
134.77
17.54
Clear
Yes
1140
10.00
360.00
1800.00
4.43
0.03
217.20
19.70
136.81
17.67
Clear
Yes
11:45
9.99
360.00
1800.00
4.43
0.01
215.50
20.00
140.86
17.69
Clear
Yes
11:50
9.99
360.00
1800.00
4.44
0.00
212.30
20.30
141.25
17.59
Clear
Yes
11:55
10.98
360.00
1800.00
4.44
0.00
211.40
22.10
140.91
17.71
Clear
Yes
1200
10.94
280.00
1400.00
4.44
0.00
208.20
19.80
140.19
17.76
Clear
Yes
12:05
9.94
280.00
1400.00
4.43
0.00
204.50
17.40
137.74
17.78
Clear
Yes
Screen Interval: 29.0-44.0
Sampling Data
Method: I Low Flow
Field Filtered:
Field Parameters
STABILIZED PARAMETERS
pH
4.43
Spec. Cond.(pS/cm)
137.74
Turbidity (NTIJ)
17.40
Temp.(°C)
17.78
DO (mg/L)
0.00
ORP (mV)
204.50
Date: 01-15-2024 Time: 1219
Sample ID: CAP1Q24-LTW-05-011524
Duplicate) D:
QA/QC:
Purge Start Time: 11:21
Total Volume Purged (mL): 15040
WEATHER CONDITIONS
Temperature (F).
Sky:
Precipitation:
Wind (mph)
50.00
Partly Sunny
None
3
i roue -11,g
r rearingeseier worltl

i—11,g—f
r realingeseier worltl

i—11,g—f
r realingeseier worltl

RECORD OF WELL SAMPLING
Site Name: Chemours Fayetteville Well ID: OW-33
Samplers: BRANDON WEIDNERIERIN JANIGA Event: Quarterly CAP
Purging Data Pump Depth: 28
Pump Loc: within screen
Method: Peristaltic Pump M Date: 01-30-2024 Time: 11:11
Well Diameter: Inches
Project Manager: Tracy Ovbey
WATER VOLUME CALCULATION
_ (Total Depth of Well - Depth To Water) x Casing Volume per Foot
Water Volume =
Initial Depth to Water (ft.):
I W Depth to Well Bottom (ft.):32.03
Time
DTW
Pump Rate
Vol.
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
Comments
24 hr
ft
mL/min
mL
pH units
mg/L
mV
NTU
pS/cm
°C
1134
8.24
280.00
1400.00
5.49
0.22
59.10
16.80
69.07
M.94
Clear
Yes
11:39
8.24
280.00
1400.00
4.5
0.21
97.60
15.90
66.00
17.01
Clear
Yes
11:44
8.24
280.00
1400.00
4.44
0.19
167.50
15.60
65.00
17.05
Clear
Yes
11:49
8.24
280.00
1400.00
4.44
0.17
185.00
10.50
64.77
17.09
Clear
Yes
11:54
8.24
280.00
1400.00
4.42
0.16
193.40
10.10
64.66
17.22
Clear
Yes
11:59
8.24
280.00
1400.00
4.42
0.15
198.80
7.43
65.56
16.98
Clear
Yes
12:04
8.24
280.00
1400.00
4.41
0.14
200.20
5.75
64.51
17.36
Clear
Yes
12:09
8.24
280.00
1400.00
4A
0.14
207.70
4.58
64.40
17.24
Clear
Yes
1214
8.24
280.00
1400.00
4.38
0.14
210.60
4.09
64.76
17.05
Clear
Yes
Sampling Data
Field Parameters
Screen Interval:
Purge Start Time:
Method: Low Flow Date: 01-30-2024 Time: 12: 44 Total Volume Purged (mL):
Field Filtered: No
STABILIZED PARAMETERS
pH
4.38
Spec. Cond.(pS/cm)
64.76
Turbidity (NTU)
4.09
Temp.(°C)
17.05
DO (mg/L)
0.14
ORP (mV)
210.60
Sample ID: CAP1Q24-OW-33-013024
Duplicatel D:
QA/QC:
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
49.00
Sunny
None
6
i roue -11,g
r realingeseiei worltl

RECORD OF WELL SAMPLING
Site Name: Chemours Fayetteville Well ID: PIW-1D
Samplers: BRANDON WEIDNER Event: Quarterly CAP
Purging Data Pump Depth: 27
Pump Loc: within screen
Method: Peristaltic Pump Date: Ot-t 8-2024 Time: 14:05
Well Diameter: Inches
Project Manager: Tracy Ovbey
WATER VOLUME CALCULATION
_ (Total Depth of Well - Depth To Water ) x Casing Volume per Foot
Water Volume =
2.48
Initial Depth to Water (ft.):
96.13 Depth to Well Bottom (ft.): 31.63
Time
DTW
Pump Rate
Vol.
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
Comments
24 hr
ft
mL/min
mL
pH units
mg/L
mV
NTIJ
PS/cm
°C
14:25
16.21
175.00
3150.00
3.73
0.31
322.50
228.00
155.64
15.26
Cloudy
No
14:30
16.21
175.00
875.00
3.71
0.22
337.30
228.00
156.06
15.31
Cloudy
No
14:35
16.21
175.00
875.00
3.7
0.19
369.80
170.00
156.26
15.16
Cloudy
No
14:40
16.21
175.00
875.00
3.7
0.19
362.60
124.00
108.19
15.30
Cloudy
No
14:45
16.21
175.00
875.00
3.69
0.16
369.10
94.80
106.59
15.42
Cloudy
No
14:50
16.21
175.00
875.00
3.69
0.16
373.90
93.00
111.25
15.22
Cloudy
No
1455
16.21
175.00
875.00
3.68
0.15
383.30
80.30
92.48
15.43
Cloudy
No
15:00
16.21
175.00
875.00
3.68
0.12
378.50
62.80
28.13
15.38
Cloudy
No
15:05
16.21
175.00
875.00
3.67
0.14
383.40
52.30
20.13
15.50
Cloudy
No
15:10
16.21
175.00
875.00
3.67
0.12
1 385.60
47.101
18.92
15.50
Cloudy
No
15:15
16.21
175.00
875.00
3.67
0.11
388.00
39.80
17.55
15.61
Clear
No
15:20
16.21
175.00
875.00
3.66
0.11
388.20
31.30
13.22
15.66
Clear
No
15:25
16.21
175.00
875.00
3.66
0.12
391.20
32.40
141.91
15.87
Clear
No
unable to stabilize; vall continue 1/22
11:14
17.02
250.00
-62750.00
3.84
0.17
321.90
3.30
194.86
15.06
Clear
No
resume purge from 1/18
11:19
17.02
250.00
1250.00
3.82
0.17
333.80
20.60
191.76
15.10
Clear
No
11:24
17.02
250.00
1250.00
3.81
0.17
344.80
1 26.601
183.81
15.37
Clear
No
11:29
17.02
250.00
1250.00
3.8
0.13
349.40
22.10
169.47
15.31
Clear
No
11:34
17.02
250.00
1250.00
3.8
0.07
350.20
17.80
161.01
15.54
Clear
No
11:39
17.02
250.00
1250.00
3.79
0.05
354.30
11.80
157.16
15.89
Clear
No
11:44
17.02
250.00
1250.00
3.79
0.02
368.70
12.60
161.26
15.93
Clear
No
11:49
17.02
250.00
1250.00
3.79
0.01
372.30
9.94
166.77
15.83
Clear
No
11:54
17.02
250.00
1250.00
3.79
0.00
1 379.50
1 3.44
173.00
16.02
Clear
No
11:59
17.02
250.00
1250.00
3.79
0.00
380.90
7.33
174.93
15.84
Clear
No
12:04
17.02
250.00
1250.00
3.78
0.00
386.90
5.84
174.25
15.95
Clear
No
Screen Interval:
Sampling Data
Method: I Low Flow
Field Filtered: No
Field Parameters
STABILIZED PARAMETERS
pH
3.78
Spec. Cond.(pS/cm)
174.25
Turbidity (NTIJ)
5.84
Temp.(°C)
15.95
DO (mg/L)
0.00
ORP (mV)
386.90
Date: 01-22-2024 Time: 1204
Sample ID: CAP1024-PIW-lD-012224
Duplicatel D:
QA/QC:
Purge Start Time: 14:07
Total Volume Purged (mL): -36600
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
53.00
Sunny
None
i roue -11,g
r rearingeseier w°rltl

RECORD OF WELL SAMPLING
Site Name: Chemours Fayetteville Well ID: PIWAS
Samplers: HERBERT WATTSIKEN STUART Event: Quarterly CAP
Purging Data Pump Depth: 21
Pump Loc: within screen
Method: Peristaltic Pump M Date: 01-16-2024 Time: 14:29
Well Diameter: Inches
Project Manager: Tracy Ovbey
WATER VOLUME CALCULATION
_ (Total Depth of Well - Depth To Water) x Casing Volume per Foot
Water Volume =
Initial Depth to Water (ft.):
1 16.22 Depth to Well Bottom (ft.):22.01
Time
DTW
Pump Rate
Vol.
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
Comments
24 hr
ft
mL/min
mL
pH units
mg/L
mV
NTU
pS/cm
°C
1522
16.29
175.00
0.00
3.7
2.76
250.60
12.20
221.16
14.38
Clear
None
15:27
16.30
175.00
875.00
3.68
2.71
273.00
9.05
220.95
14.36
Clear
None
15:32
16.30
175.00
875.00
3.69
2.78
290.40
7.74
216.94
14.60
Clear
None
15:37
16.31
175.00
875.00
3.76
2.68
321.70
5.95
216.38
14.29
Clear
None
15:42
16.31
175.00
875.00
3.77
2.66
311.70
4.50
214.62
14.26
Clear
None
15:47
16.31
175.00
875.00
3.8
2.71
311.00
3.35
213.57
14.28
Clear
None
Screen Interval:
Sampling Data
Method: I Low Flow
Field Filtered: No
Field Parameters
STABILIZED PARAMETERS
pH
3.80
Spec. Cond.(pS/cm)
213.57
Turbidity (NTU)
3.35
Temp.(°C)
14.28
DO (mg/L)
2.71
ORP (mV)
311.00
Date: 01-16-2024 Time: 1547
Sample ID: CAP1Q24-PIW-1S-011624
Duplicate) D:
QA/QC:
Purge Start Time: 15:16
Total Volume Purged (ml-): 4375
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
47.00
Cloudy
Rain
0
i roue -11,g
r realingeseiei worltl

RECORD OF WELL SAMPLING
Site Name: Chemours Fayetteville Well ID: F PIW-3D
Samplers: BRANDON WEIDNER Event:I Quarterly CAP
Purging Data Pump Depth: 23
Pump Loc: within screen
Method: Peristaltic Pump Date: 01-18-2024 Time: 11:36
Well Diameter: Inches
Project Manager: Tracy Ovbey
WATER VOLUME CALCULATION
_ (Total Depth of Well - Depth To Water ) x Casing Volume per Foot
Water Volume =
1.632
Initial Depth to Water ft.:
16.69 Depth to Well Bottom ft.: 1 26.89
Time
DTW
Pump Rate
Vol.
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
Comments
24 hr
ft
mL/min
mL
old units
m /L
mV
NTU
PS/cm
oC
12:41
16.77
175.00
8575.00
5.77
0.20
-45.80
13.30
106.58
16.25
Clear
No
12:46
16.78
175.00
875.00
5.72
0.15
-17.50
8.35
99.33
16.16
Clear
No
12:51
16.78
175.00
875.00
5.72
0.13
3.80
6.87
99.11
16.24
Clear
No
12:56
16.78
175.00
875.00
5.74
0.10
12.70
5.98
99.90
16.40
Clear
No
13:01
16.78
175.00
875.00
5.74
0.10
16.30
4.75
101.71
16.47
Clear
No
13:06
16.78
175.00
875.00
5.75
0.08
17.40
3.33
100.92
16.41
Clear
No
13:11
16.78
175.00
875.00
5.75
0.07
18.30
3.31
100.83
16.56
Clear
No
13:16
16.78
175.00
875.00
5.76
0.07
18.50
3.32
102.12
16.86
Clear
No
13:21
16.78
175.00
875.00
5.78
0.07
18.40
2.30
102.68
16.26
Clear
No
Screen Interval:
Samolino Data
Method It. Flow
Field Filtered: No
Field Parameters
STABILIZED PARAMETERS
pH
5.78
Spec. Cond.(pS/cm)
102.68
Turbidity (NTU)
2.30
Temp.(°C)
16.26
DO (mg/L)
0.07
ORP (mV)
18.40
Date: 01-18-2024 Time: 13:21
Sample ID: CAP1Q24-PIW-3D-011824
DuplicatelD:
QA/QC:
Purge Start Time: 11:52
Total Volume Purged (ml-): 15575
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
46.00
Sunny
None
8
Tcrearinga sa er worltl

RECORD OF WELL SAMPLING
Site Name: Chemours Fayetteville Well ID: PIW-4D
Samplers: FELIPE SILVA Jacob kantola Event: Quarterly CAP
Purging Data Pump Depth: 35
Pump Loc: within screen
Method: Peristaltic Pump I Date: Ot-22-2024 Time: 14:05
Well Diameter: Inches
Project Manager: Tracy Ovbey
WATER VOLUME CALCULATION
_ (Total Depth of Well - Depth To Water) x Casing Volume per Foot
Water Volume = W 4.517
Initial Depth to Water (ft.): 1 12.56 Depth to Well Bottom (ft.):
Time
DTW
Pump Rate
Vol.
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
Comments
24 hr
ft
mL/min
mL
pH units
mg/L
mV
NTU
PS/cm
°C
14:30
12.59
300.00
2400.00
6.22
0.02
-63.80
10.10
58.48
22.05
Clear
Yes
14:35
12.58
300.00
1500.00
6.26
0.00
-78.40
7.63
58.30
22.13
Clear
Yes
AW
14:40
12.59
300.00
1500.00
6.29
0.00
-85.90
7.96
58.15
22.03
Clear
Yes
14:45
12.59
300.00
1500.00
6.31
0.00
-92.10
9.11
58.32
22.10
Clear
Yes
Screen Interval:
Samolina Data
Method: I Low Flow
Field Filtered: No
Field Parameters
STABILIZED PARAMETERS
pH
6.31
Spec. Cond.(pS/cm)
58.32
Turbidity (NTU)
9.11
Temp.(°C)
22.10
DO (mg/L)
0.00
ORP (mV)
-92.10
Date: 01-22-2024 Time: 1445
Sample ID: CAP1Q24-PIW-4D-012224
Duplicate) D:
QA/QC:
Purge Start Time: 14:22
Total Volume Purged (mL): 6900
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
53
Sunny
None
8
i rcus
-11,g
r realingeseiei worltl

RECORD OF WELL SAMPLING
Site Name: Chemours Fayetteville Well ID: PIW-7D
Samplers: DEBORAH AYERS Event: Quarterly CAP
Purging Data Pump Depth: 35.5
Pump Loc: within screen
Method: Peristaltic Pump I Date: Ot-15-2024 Time: 09:45
Well Diameter: Inches
Project Manager: Tracy Ovbey
WATER VOLUME CALCULATION
_ (Total Depth of Well - Depth To Water) x Casing Volume per Foot
Water Volume = 4.546
Initial Depth to Water ft): 8.63 Depth to Well Bottom (ft.): 37.04
Time
DTW
Pump Rate
Vol.
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
Comments
24 hr
ft
mL/min
mL
pH units
mg/L
mV
NTU
PS/cm
°C
10:08
8.61
240.00
1920.00
4.44
0.13
167.30
38.90
119.81
15.76
Clear
No
10:13
8.61
240.00
1200.00
4.47
0.11
141.50
17.10
118.70
15.93
Clear
No
10:18
8.61
240.00
1200.00
4.47
0.08
113.70
7.66
118.54
15.90
Clear
No
10:23
8.61
240.00
1200.00
4.48
0.05
99.20
6.15
118.02
15.92
Clear
No
10:28
8.61
240.00
1200.00
4.47
0.06
a4.50
6.99
122.30
16.38
Clear
No
10:33
8.61
240.00
1200.00
4.46
0.04
76.10
3.16
115.63
16.58
Clear
No
10:38
8.61
4.46
22.30
4.46
0.04
67.00
2.13
116.70
16.60
Clear
No
10:43
8.61
240.00
1200.00
4.45
0.02
59.10
2.05
115.66
16.64
Clear
No
10:48
8.61
240.00
1200.00
4.45
0.01
52.30
2.29
116.41
16.77
Clear
No
10:53
8.61
240.00
1200.00
4.44
0.01
47.10
8.951
115.84
16.59
Clear
No
10:58
8.61
240.00
1200.00
4.44
0.03
49.90
3.14
116.36
16.75
Clear
No
11:04
8.61
240.00
1440.00
4.44
0.03
42.50
2.15
115.93
16.76
Clear
No
11:09
8.61
240.00
1200.00
4.43
0.03
37.90
2.17
117.02
16.91
Clear
No
1114
8.61
240.00
1200.00
4.42
0.03
35.50
3.27
115.34
17.05
Clear
No
11:19
8.61
240.00
1200.00
4.42
0.03
32.60
2.25
116.71
17.01
Clear
No
11:24
8.61
240.00
1200.00
4.42
0.02
28.10
1.961
117.60
17.23
Clear
No
11:29
8.61
240.00
1200.00
4.41
0.02
24.70
1.68
115.58
17.12
Clear
No
11:35
8.61
240.00
1440.00
4.41
0.02
21.60
1.69
115.97
17.22
Clear
None
11:40
8.61
240.00
1200.00
4.4
0.01
19.40
1.88
116.89
17.18
Clear
None
11:45
8.61
240.00
1200.00
4.4
0.01
16.20
1.29
115.12
17.26
Clear
None
11:51
8.61
240.00
1440.00
4.4
0.00
14.70
1.29
113.71
17.34
Clear
None
11:55
8.61
240.00
960.00
4.4
0.02
12.60
1.48
114.84
17.43
Clear
None
12:01
8.61
240.00
1440.00
4.4
0.03
11.50
1.49
112.79
17.50
Clear
None
12:05
8.61
240.00
960.00
4.4
0.10
9.70
1.37
115.97
17.39
Clear
None
12:10
8.61
240.00
1200.00
4.39
0.11
9.10
1.38
116.37
17.49
Clear
None
12:15
8.61
240.00
1200.00
4.39
0.03
8.10
4.04
116.40
17.42
Clear
No
12:21
6.81
240.00
1440.00
4.38
0.03
10.00
1.95
115.11
17.60
Clear
No
12:25
8.61
240.00
960.00
4.39
0.01
7.60
4.91
113.49
17.59
Clear
No
1231
8.61
240.00
1440.00
4.39
0.00
5.70
1.98
110.15
17.51
Clear
No
12:36
8.61
240.00
1200.00
4.39
0.00
4.30
1.93
113.86
17.67
Clear
No
12:40
8.61
240.00
960.00
4.39
0.00
2.50
1.90
114.96
17.46
Clear
No
12:46
8.61
240.00
1440.00
4.39
0.00
0.10
0.92
114.67
17.44
Clear
No
1251
8.61
240.00
1200.00
4.39
0.01
-1.30
1.55
115.55
17.53
Clear
No
12:56
8.61
240.00
1200.00
4.39
0.01
-1.70
1.36
114.90
17.32
Clear
No
13:01
6.81
240.00
1200.00
4.39
0.00
-1.50
1.00
114.24
17.28
Clear
No
13:06
6.81
240.00
1200.00
4.4
0.00
-1.50
0.91
114.06
17.27
Clear
No
1311
8.61
240.00
1200.00
4.39
0.00
-0.80
0.99
113.51
17.30
Clear
No
Screen Interval: 24.5 to 29.5
Sampling Data
Method: I Low Flow
Field Filtered: No
Field Parameters
STABILIZED PARAMETERS Sample ID:
pH 4.39 Duplicatel D:
Purge Start Time: 10:00
Date: 01-15-2024 Time: 1311 Total Volume Purged (ml-): 44662.3
CAP1Q24-PIW-7D-011524 WEATHER CONDITIONS
CAP1024-PIW-7D-011524-D Temperature(F): 48.00
i-11,g-f
r realingeseiei worltl

Spec. Cond.(pS/cm)
113.51
Turbidity (NTU)
0.99
Temp.(°C)
17.30
DO (mg/L)
0.00
ORP (mV)
-0.80
QA/QC: DupIMSIMSD
Sky: Sunny
Precipitation: None
Wind (mph) 4
i roue —11,g
r realingeseierxwltl

RECORD OF WELL SAMPLING
Site Name: Chemours Fayetteville Well ID: PIW-7S
Samplers: DEBORAH AYERS Event: Quarterly CAP
Purging Data Pump Depth: 15
Pump Loc: within screen
Method: Peristaltic Pump I Date: Ot-t 5-2024 Time: 14:00
Well Diameter: Inches
Project Manager: Tracy Ovbey
WATER VOLUME CALCULATION
_ (Total Depth of Well - Depth To Water) x Casing Volume per Foot
Water Volume = U 1.934
Initial Depth to Water (ft.): 8.13 Depth to Well Bottom (ft.):
Time
DTW
Pump Rate
Vol.
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
Comments
24 hr
ft
mL/min
mL
pH units
mg/L
mV
NTU
PS/cm
°C
14:08
8.58
245.00
1960.00
4.83
0.12
210.49
72.90
138.59
17.01
Cloudy
No
14:13
8.59
245.00
1225.00
4.86
0.07
207.15
64.50
136.85
17.05
Cloudy
No
14:18
8.59
245.00
1225.00
4.94
0.04
201.39
40.80
133.67
17.11
Clear
No
14:23
8.60
245.00
1225.00
5.16
0.02
182.75
30.40
129.43
17.07
Clear
No
14:28
8.60
245.00
1225.00
5.21
0.02
171.96
25.00
130.18
17.10
Clear
No
14:33
8.60
245.00
1225.00
5.37
0.01
156.02
15.40
129.98
17.20
Clear
I No
14:38
8.60
245.00
1225.00
5.36
0.01
153.23
16.40
131.74
17.20
Clear
No
14:43
8.60
245.00
1225.00
5.53
0.00
134.48
9.39
134.50
17.08
Clear
No
14:48
8.60
245.00
1225.00
5.52
0.00
125.03
11.50
135.33
17.08
Clear
No
1455
8.60
245.00
1715.00
5.55
0.00
1 116.79
8.751
136.33
17.14
Clear
No
15:00
6.80
1 245.00
1225.00
1 5.55
0.00
110.81
10.90
136.73
17.10
Clear
No
15:05
8.60
245.00
1225.00
5.65
0.00
102.52
7.76
140.07
17.08
Clear
No
15:10
8.60
245.00
1225.00
5.62
0.00
95.59
9.14
138A4
17.07
Clear
No
15:15
8.60
240.00
1200.00
5.66
0.00
90.91
5.96
140.37
17.01
Clear
No
15:20
8.60
245.00
1225.00
5.65
0.00
90.31
8.06
139.69
17.07
Clear
No
Sampling Data
Field Parameters
Screen Interval: 1 7.8 - 17.8
Purge Start Time: 14:00
Method: Low Flow Date: 01-15-2024 Time: 1520 Total Volume Purged (ml-): 19575
Field Filtered: No
STABILIZED PARAMETERS
pH
5.65
Spec. Cond.(pS/cm)
139.69
Turbidity (NTU)
8.06
Temp.(°C)
17.07
DO (mg/L)
0.00
ORP (mV)
90.31
Sample ID: CAP1024-PIW-7S-011524
Duplicate) D:
QA/QC:
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
61.00
Sunny
None
12
i-11,g-f
r realingeseiei worltl

RECORD OF WELL SAMPLING
Site Name: Chemours Fayetteville Well ID: PW-04
Samplers: DEBORAH AYERS Event: Quarterly CAP
Purging Data Pump Depth:
Pump Loc: within screen
Method: Bailer Date: 1/15/2024 Time: 09:19
Well Diameter: Inches
Project Manager: Tracy Ovbey
WATER VOLUME CALCULATION
_ (Total Depth of Well - Depth To Water) x Casing Volume per Foot
Water Volume = 0.445
Initial Depth to Water (ft.): 1 29.03 Depth to Well Bottom (ft.): 30.81
Time
DTW
Pump Rate
Vol.
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
Comments
24 hr
ft
mUmin
mL
pH units
mg/L
mV
NTU
PS/cm
°C
09:25
29.03
0.00
3.39
3.36
207.80
5.11
457.23
18.56
Clear
No
Bailed approximately 1400 mL
15:53
29.03
0.00
3.38
4.06
353.02
12.20
507.98
18.74
Clear
No
11:54
28.94
0.00
3.26
10.39
390.00
28.93
413.52
13.06
Cloudy
No
Bailed 1030 mLs
16:10
29.27
0.00
3.32
0.75
384.40
392.98
13.44
Clear
No
Bailed 1050 mL
09:08
28.99
0.00
4.27
3.76
102.20
161.00
700.86
13.13
Cloudy
No
Bailed approximately 1400 mLs
15:55
1 29.01
0.00
3.86
8.11
362.10
40.60
539.05
13.70
Clear
No
Screen Interval: 56-66
Sampling Data
Method: I Low Flow
Field Filtered: Yes
Field Parameters
STABILIZED PARAMETERS
pH
3.86
Spec. Cond.(pS/cm)
539.05
Turbidity (NTU)
40.60
Temp.(°C)
13.70
DO (mg/L)
8.11
ORP (mV)
362.10
Date: 01-17-2024 Time: 15:55
Sample ID: CAP1Q24-PW-04-011724-Z
Duplicatel D:
QA/QC:
Purge Start Time: 09:49
Total Volume Purged (ml-): 0
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
45.00
Cloudy
None
0
i r.'we, rl.us
r realingeseiei worltl

RECORD OF WELL SAMPLING
Site Name: Chemours Fayetteville Well ID: PW-06
Samplers: FELIPE SILVAISAIRA BOHAM Event: Quarterly CAP
Purging Data Pump Depth: 25
Pump Loc: within screen
Method: Peristaltic Pump Date: 01-15-2024 Time: 13:56
Well Diameter: Inches
Project Manager: Tracy Ovbey
WATER VOLUME CALCULATION
_ (Total Depth of Well - Depth To Water ) x Casing Volume per Foot
Water Volume =
1.925
Initial Depth to Water (ft.):
1 20.86 Depth to Well Bottom (ft.): 32.89
Time
DTW
Pump Rate
Vol.
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
Comments
24 hr
ft
mL/min
mL
pH units
mg/L
mV
NTIJ
PS/cm
°C
14:15
22.15
320.00
1600.00
4.47
6.40
287.90
7.44
50.80
17.23
Clear
No
14:20
22.25
320.00
1600.00
4.45
6.25
303.40
1.88
51.67
17.29
Clear
No
1425
22.26
320.00
1600.00
4.43
5.86
311.30
1.44
53.92
17.23
Clear
No
14:30
22.12
320.00
1600.00
4.41
5.58
312.80
1.14
57.08
17.27
Clear
No
14:35
22.01
320.00
1600.00
4.43
5.52
315.10
1 1.57
53.74
17.28
Clear
No
Sampling Data
Field Parameters
Screen Interval: 35-45
Purge Start Time:
Method: I Low Flow Date: 01-15-2024 Time: 1435 Total Volume Purged (mL):
Field Filtered: No
STABILIZED PARAMETERS
pH
4.43
Spec. Cond.(pS/cm)
53.74
Turbidity (NTIJ)
1.57
Temp.(°C)
17.28
DO (mg/L)
5.52
ORP (mV)
315.10
Sample ID: CAP1Q24-PW-06-011524
Duplicate) D:
QA/QC:
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
60.00
Partly Sunny
None
6
i roue -11,g
r realingeseiei worltl

RECORD OF WELL SAMPLING
Site Name: Chemours Fayetteville Well ID: PW-07
Samplers: HERBERT WATTSISAIRA BOHAM Event: Quarterly CAP
Purging Data Pump Depth:
Pump Loc:
Method: Bailer Date: 01-29-2024 Time: 09:01
Well Diameter: Inches
Project Manager: Tracy Ovbey
WATER VOLUME CALCULATION
_ (Total Depth of Well - Depth To Water) x Casing Volume per Foot
Water Volume =
Initial Depth to Water (ft.):
1 41.15 Depth to Well Bottom (ft.): 41.76
Time
DTW
Pump Rate
Vol.
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
Comments
24 hr
ft
mL/min
mL
pH units
mg/L
mV
NTU
pS/cm
°C
0901
41.15
0.00
5.86
7.13
98.60
24.60
185.11
21.96
Clear
No
Approximately 251 mL bailed
16:00
41.15
0.00
5.2
6.65
137.40
9.68
36.69
22.80
Clear
No
Approximately 260ml. bailed
09:24
41.20
0.00
7.77
2.25
95.30
23.90
748.49
21.02
Clear
No
Approximately 245 mL bailed
09:13
41.14
0.00
7.29
8.46
41.10
56.20
0.24
14.51
Clear
No
Approximately 251 mL bailed
10:30
41.35
0.00
9.06
12.28
-31.90
134.00
408.93
14.43
Cloudy
F
No
Screen Interval: 90-100
Sampling Data
Method: Low Flow
Field Filtered: I No
Field Parameters
STABILIZED PARAMETERS
pH
9.06
Spec. Cond.(pS/cm)
408.93
Turbidity (NTU)
134.00
Temp.(°C)
14.43
DO (mg/L)
12.28
ORP (mV)
-31.90
Date: 02-07-2024 Time: 1040
Sample ID: CAP1Q24-PW-07-020724
Duplicatel D:
QA/QC:
Purge Start Time: 09:01
Total Volume Purged (mL): 0
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
57.00
Sunny
None
5
i-11,g-f
r realingeseier worltl

RECORD OF WELL SAMPLING
Site Name: Chemours Fayetteville Well ID: PW-09
Samplers: FELIPE SILVA Event: Quarterly CAP
Purging Data Pump Depth: 45
Pump Loc: within screen
Method: Double valve pump Date: Ot-23-2024 Time: 11:34
Well Diameter: Inches
Project Manager: Tracy Ovbey
WATER VOLUME CALCULATION
_ (Total Depth of Well - Depth To Water) x Casing Volume per Foot
Water Volume = W 5.187
Initial Depth to Water ft): 1 25.24 Depth to Well Bottom (ft.):
Time
DTW
Pump Rate
Vol.
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
Comments
24 hr
ft
mL/min
mL
pH units
mg/L
mV
NTU
PS/cm
°C
11:40
31.77
660.00
3300.00
11.18
1.75
-18.10
12.80
309.76
17.07
Clear
No
11:45
32.69
600.00
3000.00
10.3
1.18
-26.60
32.70
134.18
16.95
Clear
No
11:50
32.81
480.00
2400.00
9.29
0.08
-34.90
74.50
116.98
16.29
Cloudy
No
11:55
32.67
500.00
2500.00
8.7
0.06
-192.70
51.00
102.75
16.96
Cloudy
No
12:00
32.54
500.00
2500.00
7.6
0.10
-205.50
43.00
96.59
16.95
Cloudy
No
12:05
32.43
500.00
2500.00
7.32
0.20
-145.48
34.40
90.41
16.89
Clear
No
12:10
32.33
500.00
2500.00
7.14
0.20
-122.80
35.10
86.72
16.97
Clear
No
12:15
32.21
500.00
2500.00
7.08
0.26
-122.90
32.70
83.95
16.92
Clear
No
12:20
32.15
500.00
2500.00
6.85
0.21
-100.90
30.90
82.33
16.93
Clear
No
12:25
32.09
500.00
2500.00
6.96
0.18
1 -106.50
30.901
80.87
16.97
Clear
No
12:30
32.05
500.00
2500.00
6.89
0.18
-100.40
31.50
79.03
16.98
Clear
No
12:35
32.01
500.00
2500.00
6.88
0.19
-92.20
30.30
78.43
17.00
Clear
No
12:40
32.00
500.00
2500.00
6.78
0.15
-92.20
30.80
77.13
16.99
Clear
No
12:45
32.00
500.00
2500.00
6.7
0.20
-89.90
29.10
76.24
17.02
Clear
No
12:50
32.00
500.00
2500.00
6.76
0.16
-88.70
31.40
75.78
17.00
Clear
No
12:55
32.00
500.00
2500.00
6.76
0.12
-86.00
31.40
75.00
17.00
Clear
No
13:00
32.00
500.00
2500.00
6.76
0.15
83.70
27.50
74.15
17.03
Clear
No
13:05
32.00
500.00
2500.00
6.77
0.19
-81.70
28.50
73.81
73.82
Clear
No
13:10
32.00
500.00
2500.00
6.77
0.18
-83.00
26.10
73.20
17.05
Clear
No
13:15
32.00
500.00
2500.00
6.71
0.20
-77.70
26.60
72.81
17.04
Clear
No
1320
32.00
500.00
2500.00
6.67
0.15
-71.90
29.401
72.10
17.04
Clear
No
13:25
32.00
500.00
2500.00
6.71
0.14
-76.30
24.50
71.34
17.05
Clear
No
13:30
32.00
500.00
2500.00
6.41
0.17
-75.20
23.60
71.20
17.06
Clear
No
13:35
32.00
500.00
2500.00
6.43
0.15
-74.50
23.20
71.02
17.09
Clear
No
1340
32.00
500.00
2500.00
6.68
0.21
-72.10
22.00
70.68
17.09
Clear
No
13:45
32.00
500.00
2500.00
6.71
0.18
-71.90
22.80
70.43
17.09
Clear
No
13:50
32.00
500.00
2500.00
6.61
0.14
-71.40
23.801
70.08
17.08
Clear
No
13:55
32.00
500.00
2500.00
6.39
0.16
-71.00
23.30
69.93
17.09
Clear
No
1400
32.00
500.00
2500.00
6.57
0.12
-61.20
26.50
69.74
17.10
Clear
No
14:05
32.00
500.00
2500.00
6.67
0.15
66.90
21.40
69.46
17.08
Clear
No
14:10
32.00
500.00
2500.00
6.63
0.14
-67.80
19.70
69.25
17.10
Clear
No
14:15
32.00
500.00
2500.00
6.55
0.14
-65.30
20.40
68.80
17.11
Clear
No
1420
32.00
500.00
2500.00
6.66
0.12
-67.80
19.40
68.84
17.09
Clear
No
14:25
32.00
240.00
1200.00
6.41
0.00
-67.30
20.00
67.48
16.90
Clear
No
14:30
32.00
240.00
1200.00
6.6
0.13
-61.10
18.60
67.42
16.89
Clear
No
14:35
32.00
240.00
1200.00
6.61
0.13
-62.20
19.20
67.28
16.87
Clear
No
1440
32.00
240.00
1200.00
6.61
0.13
-63.50
19.40
67.32
16.87
Clear
No
Screen Interval: 11 -21
Sampling Data
Method: I Low Flow
Field Filtered: No
Field Parameters
STABILIZED PARAMETERS Sample ID:
pH 6.61 Duplicatel D:
Purge Start Time: 11:35
Date: 09-23-2024 Time: 1440 Total Volume Purged (ml-): 88500
CAP1Q24-PW-09-092324 WEATHER CONDITIONS
CAP1024-PW-09-092324-D Temperature (F): 49.00
i-11,g-f
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Spec. Cond.(pS/cm)
67.32
Turbidity (NTU)
19.40
Temp.(°C)
16.87
DO (mg/L)
0.13
ORP (mV)
-63.50
QA/QC: DupIMSIMSD
Sky: Cloudy
Precipitation: None
Wind (mph) 3
i roue —11,g
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RECORD OF WELL SAMPLING
Site Name: Chemours Fayetteville Well ID: PZ-22
Samplers: FELIPE SILVA Event: Quarterly CAP
Purging Data Pump Depth: 44
Pump Loc: within screen
Method: Peristaltic Pump I Date: Ot-t 6-2024 Time: 14:34
Well Diameter: Inches
Project Manager: Tracy Ovbey
WATER VOLUME CALCULATION
_ (Total Depth of Well - Depth To Water) x Casing Volume per Foot
Water Volume = W 1.64
Initial Depth to Water (ft.): 1 10.73 Depth to Well Bottom (ft.): 50.73
Time
DTW
Pump Rate
Vol.
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
Comments
24 hr
ft
mL/min
mL
pH units
mg/L
mV
NTU
PS/cm
°C
14:56
10.73
200.00
0.00
4.87
0.28
95.20
272.00
82.54
14.48
Cloudy
Yes egg
15:00
11.73
200.00
800.00
4.72
0.22
85.10
72.30
82.48
15.10
Cloudy
Yes
15:05
11.73
200.00
1000.00
4.67
0.18
82.10
39.10
82.32
15.00
Clear
Yes
15:10
11.73
200.00
1000.00
4.64
0.15
80.50
20.60
82.58
15.20
Clear
Yes
15:15
11.73
200.00
1000.00
4.6
0.14
78.00
11.30
82.36
15.27
Clear
Yes
1520
11.73
200.00
1000.00
4.57
0.15
76.30
9.44
82.41
15.30
Clear
Yes
Screen Interval: 10.2-15.2
Sampling Data
Method: I Low Flow
Field Filtered: No
Field Parameters
STABILIZED PARAMETERS
pH
4.57
Spec. Cond.(pS/cm)
82.40
Turbidity (NTU)
9.44
Temp.(°C)
15.30
DO (mg/L)
0.15
ORP (mV)
76.30
Date: 01-16-2024 Time: 15:20
Sample ID: CAP1Q24-PZ-22-011624
Duplicatel D:
QA/QC:
Purge Start Time: 14:50
Total Volume Purged (mL): 4800
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
43.00
Cloudy
Rain
11
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i—11,g—f
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Sampling Data
Field Parameters
Screen Interval: 45.0-60.0
Purge Start Time: 10:40
Method: I Low Flow Date: 01-17-2024 Time: 1439 Total Volume Purged (mL): 34500
Field Filtered: No
STABILIZED PARAMETERS
pH
5.71
Spec. Cond.(pS/cm)
113.40
Turbidity (NTU)
16.30
Temp.CC)
12.62
DO (mg/L)
0.00
ORP (mV)
-60.40
Sample ID: CAP1Q24-SMW-10-011724
Duplicatel D:
QA/QC:
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
27.00
Sunny
None
3
i roue —11,g
r realingeseierxwltl

RECORD OF WELL SAMPLING
Site Name: Chemours Fayetteville Well ID: SMW-11
Samplers: DEBORAH AYERSIFELIPE SILVA Event: Quarterly CAP
Purging Data Pump Depth: 20
Pump Loc: within screen
Method: Peristaltic Pump M Date: 01-18-2024 Time: 14:33
Well Diameter: Inches
Project Manager: Tracy Ovbey
WATER VOLUME CALCULATION
_ (Total Depth of Well - Depth To Water) x Casing Volume per Foot
Water Volume =
Initial Depth to Water (ft.):
1 15.89 Depth to Well Bottom (ft.):25.79
Time
DTW
Pump Rate
Vol.
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
Comments
24 hr
ft
mL/min
mL
pH units
mg/L
mV
NTU
pS/cm
°C
1500
15.96
260.00
1820.00
4.1
4.41
145.90
9.83
48.02
15.12
Clear
No
15:05
15.97
260.00
1300.00
4.19
4.18
186.00
6.71
48.82
15.74
Clear
No
15:10
15.97
260.00
1300.00
4.2
4.39
213.20
3.36
46.44
15.74
Clear
No
15:15
15.97
260.00
1300.00
4.22
4.16
228.90
2.02
46.34
15.72
Clear
No
1520
15.97
260.00
1300.00
4.24
4.33
235.10
1.54
47.48
15.75
Clear
No
15:25
15.97
260.00
1300.00
4.25
4.03
238.20
1.01
48.26
15.80
Clear
No
Screen Interval: 1 12.0-22.0
Sampling Data
Method: I Low Flow
Field Filtered: No
Field Parameters
STABILIZED PARAMETERS
pH
4.25
Spec. Cond.(pS/cm)
48.26
Turbidity (NTU)
1.01
Temp.(°C)
15.80
DO (mg/L)
4.03
ORP (mV)
238.20
Date: 01-18-2024 Time: 1525
Sample ID: CAP1Q24-SMW-11-011824
Duplicate) D:
QA/QC:
Purge Start Time: 14:53
Total Volume Purged (ml-): 8320
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
52.00
Sunny
None
12
i roue -11,g
r realingeseiei worltl

RECORD OF WELL SAMPLING
Site Name: Chemours Fayetteville Well ID: SMW-12
Samplers: DEBORAH AYERS Event: Quarterly CAP
Purging Data Pump Depth: 97
Pump Loc: within screen
Method: Double valve pump Date: Ot-16-2024 Time: 13:19
Well Diameter: Inches
Project Manager: Tracy Ovbey
WATER VOLUME CALCULATION
_ (Total Depth of Well - Depth To Water) x Casing Volume per Foot
Water Volume = W 2.224
Initial Depth to Water (ft.): 1 88.12 Depth to Well Bottom (ft.):
Time
DTW
Pump Rate
Vol.
pH
DO
Redox
Turbidity
Spec. Cond.
Temp.
Color
Odor
Comments
24 hr
ft
mL/min
mL
pH units
mg/L
mV
NTU
PS/cm
°C
1446
88.21
170.00
2040.00
3.81
0.52
264.55
1.86
131,11V
11.41
Clear
No
14:51
88.18
170.00
850.00
3.8
0.52
227.20
5.83
129.94
11.98
Clear
No
14:56
88.19
170.00
850.00
3.78
0.52
214.00
3.22
134.63
12.15
Clear
No
lip
15:01
88.21
170.00
850.00
3.79
0.54
201.50
4.13
133.59
11.92
Clear
No
15:06
88.19
170.00
850.00
3.8
0.55
198.70
2.79
133.25
11.91
Clear
No
Sampling Data
Field Parameters
Screen Interval: 58 to 68
Purge Start Time: 14:22
Method: I Low Flow Date: 01-16-2024 Time: 1506 Total Volume Purged (mL): 5440
Field Filtered: No
STABILIZED PARAMETERS
pH
3.80
Spec. Cond.(pS/cm)
133.25
Turbidity (NTU)
2.79
Temp.(°C)
11.91
DO (mg/L)
0.55
ORP (mV)
198.70
Sample ID: CAP1Q24-SMW-12-011624
Duplicatel D:
QA/QQ
WEATHER CONDITIONS
Temperature (F):
Sky:
Precipitation:
Wind (mph)
48.00
Cloudy
None
3
i-11,g-f
r realingeseiei worltl

GeosMte&
consultants
Geosyntec Consultants of NC, P.C.
NC License No.: C-3500 and C-295
Appendix D
Laboratory Reports and DVM
Report
TRI 156 - Cape Fear River PFAS Mass Loading Assessment— First Quarter 2024 Report 22 June 2024

ADQM Data Review
Site: Chemours Fayetteville
Project: 2024 Tarheel Sampling 1Q24
Project Reviewer: Bridget Gavaghan

Sample Summary
Field Sample ID
Lab Sample
ID
Sample
Matrix
Filtered
Sample
Date
Sample
Time
Sample
Purpose
CFR-TARHEEL-010324
320-108552-1
Surface Water
N
01/03/2024
13:05
FS
CFR-TARHEEL-010524
320-108552-2
Surface Water
N
01/05/2024
11:35
FS
CFR-TARHEEL-010924
320-108696-1
Surface Water
N
01/09/2024
23:01
FS
CFR-TARHEEL-010924-D
320-108696-2
Surface Water
N
01/09/2024
23:01
DUP
CFR-TARHEEL-011124
320-108696-3
Surface Water
N
01/11/2024
15:30
FS
CFR-TARHEEL-12-011024
320-109022-1
Surface Water
N
01/10/2024
12:01
FS
CFR-TARHEEL-011624
320-109022-2
Surface Water
N
01/16/2024
11:20
FS
CFR-TARHEEL-24-011824
320-109022-3
Surface Water
N
01/18/2024
23:01
FS
CFR-TARHEEL-24-012024
320-109227-1
Surface Water
N
01/20/2024
23:01
FS
CFR-TARHEEL-24-012424
320-109227-2
Surface Water
N
01/24/2024
23:01
FS
CFR-TARHEEL-013024
320-109476-1
Surface Water
N
01/30/2024
15:15
FS
CFR-TARHEEL-24-020124
320-109476-2
Surface Water
N
02/01/2024
23:01
FS
CFR-TARHEEL-24-020524
320-109634-1
Surface Water
N
02/05/2024
23:01
FS
CFR-TARHEEL-24-020824
320-109634-2
Surface Water
N
02/08/2024
23:01
FS
CFR-TARHEEL-24-012624
320-109815-1
Surface Water
N
01/26/2024
23:01
FS
CFR-TARHEEL-24-021224
320-109815-2
Surface Water
N
02/12/2024
23:01
FS
CFR-TARHEEL-24-021224-D
320-109815-3
Surface Water
N
02/12/2024
23:01
DUP
CFR-TARHEEL-24-021324
320-109815-4
Surface Water
N
02/13/2024
23:01
FS
CFR-TARHEEL-24-021924
320-110015-1
Surface Water
N
02/19/2024
23:01
FS
CFR-TARHEEL-24-022224
320-110015-2
Surface Water
N
02/22/2024
23:01
FS
CFR-TARHEEL-24-022624
320-110211-1
Surface Water
N
02/26/2024
23:01
FS
CFR-TARHEEL-24-022924
320-110211-2
Surface Water
N
02/29/2024
23:01
FS
CFR-TARHEEL-24-030424
320-110617-1
Surface Water
N
03/04/2024
23:01
FS
CFR-TARHEEL-24-030724
320-110617-2
Surface Water
N
03/07/2024
23:01
FS
CFR-TARHEEL-24-031224
320-110617-3
Surface Water
N
03/12/2024
23:15
FS
CFR-TARHEEL-24-031224-D
320-110617-4
Surface Water
N
03/12/2024
23:15
DUP
CFR-TARHEEL-24-031424
320-110617-5
Surface Water
N
03/14/2024
23:01
FS
CFR-TARHEEL-24-031824
320-110617-6
Surface Water
N
03/18/2024
23:01
FS
CFR-TARHEEL-24-032124
320-111108-1
Surface Water
N
03/21/2024
23:01
FS
CFR-TARHEEL-24-032524
320-111108-2
Surface Water
N
03/25/2024
23:01
FS
CFR-TARHEEL-24-032824
320-111108-3
Surface Water
N
03/28/2024
23:01
FS
* FS=Field Sample
DUP=Field Duplicate
FB=Field Blank
EB=Equipment Blank
TB=Trip Blank

Analytical Protocol
Lab Name
Lab Method
Parameter Category
Sampling Program
Eurofins Environ Testing
Northern Cali
537 Modified
Per- and Polyfluorinated Alkyl
Substances (PFAS)
2024 Tarheel Sampling

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
heads ace 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
X
the laboratory and/or field team?
D
Were samples prepped/analyzed by the laboratory
X
X
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
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. Overall, 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.

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
• Temperature upon laboratory receipt meets the range of not frozen to 60C with a target of 40C
(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.)

DVM Narrative Report
Site: Fayetteville Sampling Program: 2024 Tarheel Sampling Validation Options: LABSTATS
Validation Reason Code: Associated LCS and/or LCSD analysis had relative percent recovery (RPR) values less than the lower control limit but above 10%. The actual detection limits may be higher
than reported.
Date
Field Sample ID Sampled Lab Sample ID Analyte
CFR-TARHEEL-24-020524 02/05/2024 320-109634-1 PS Acid
CFR-TARHEEL-24-020824 02/08/2024 320-109634-2 PS Acid
Validation
Analytical
Result Units Type MDL PQL Qualifier
Method
0.0020 UG/L PQL 0.0020 UJ
537 Modified
0.0020 UG/L PQL 0.0020 UJ
537 Modified
Pre -prep
Prep
3535
3535
Page 1 of 7

Site: Fayetteville Sampling Program: 2024 Tarheel Sampling Validation Options
Validation Reason Code: The preparation hold time for this sample was exceeded. The reporting limit may be biased low.
Date
Validation
Analytical
Field Sample ID Sampled Lab Sample ID
Analyte
Result
Units
Type
MDL PQL
Qualifier
Method
CFR-TARHEEL-12-011024 01/10/2024 320-109022-1
PFECA B
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-12-011024 01/10/2024 320-109022-1
R-PSDA
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-12-011024 01/10/2024 320-109022-1
Hydrolyzed PSDA
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-12-011024 01/10/2024 320-109022-1
R-PSDCA
0.0030
UG/L
PQL
0.0030
UJ
537 Modified
CFR-TARHEEL-12-011024 01/10/2024 320-109022-1
R-EVE
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-12-011024 01/10/2024 320-109022-1
PEPA
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-12-011024 01/10/2024 320-109022-1
PS Acid
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-12-011024 01/10/2024 320-109022-1
PF030A
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-12-011024 01/10/2024 320-109022-1
PF04DA
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-12-011024 01/10/2024 320-109022-1
PF05DA
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-12-011024 01/10/2024 320-109022-1
EVE Acid
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-12-011024 01/10/2024 320-109022-1
Hydro -PS Acid
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-12-011024 01/10/2024 320-109022-1
Hydro -EVE Acid
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-12-011024 01/10/2024 320-109022-1
NVHOS, Acid Form
0.0030
UG/L
PQL
0.0030
UJ
537 Modified
CFR-TARHEEL-12-011024 01/10/2024 320-109022-1
PFECA-G
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-012624 01/26/2024 320-109815-1
Perfluoro(2-
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
ethoxyethane)sulfonic
CFR-TARHEEL-24-012624 01/26/2024 320-109815-1
Hfpo Dimer Acid
0.0040
UG/L
PQL
0.0040
UJ
537 Modified
CFR-TARHEEL-24-012624 01/26/2024 320-109815-1
PFECA B
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-012624 01/26/2024 320-109815-1
R-PSDA
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-012624 01/26/2024 320-109815-1
Hydrolyzed PSDA
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-012624 01/26/2024 320-109815-1
R-PSDCA
0.0030
UG/L
PQL
0.0030
UJ
537 Modified
CFR-TARHEEL-24-012624 01/26/2024 320-109815-1
R-EVE
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-012624 01/26/2024 320-109815-1
PEPA
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
LABSTATS
Pre -prep
Prep
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
Page 2 of 7

Site: Fayetteville Sampling Program: 2024 Tarheel Sampling Validation Options
Validation Reason Code: The preparation hold time for this sample was exceeded. The reporting limit may be biased low.
Date
Validation
Analytical
Field Sample ID Sampled Lab Sample ID
Analyte
Result
Units
Type
MDL PQL
Qualifier
Method
CFR-TARHEEL-24-012624 01/26/2024 320-109815-1
PS Acid
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-012624 01/26/2024 320-109815-1
EVE Acid
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-012624 01/26/2024 320-109815-1
Hydro -PS Acid
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-012624 01/26/2024 320-109815-1
Hydro -EVE Acid
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-012624 01/26/2024 320-109815-1
NVHOS, Acid Form
0.0030
UG/L
PQL
0.0030
UJ
537 Modified
CFR-TARHEEL-24-012624 01/26/2024 320-109815-1
PFECA-G
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-030424 03/04/2024 320-110617-1
Perfluoro(2-
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
ethoxyethane)sulfonic
CFR-TARHEEL-24-030424 03/04/2024 320-110617-1
PMPA
0.0038
UG/L
PQL
0.0038
UJ
537 Modified
CFR-TARHEEL-24-030424 03/04/2024 320-110617-1
Hfpo Dimer Acid
0.0040
UG/L
PQL
0.0040
UJ
537 Modified
CFR-TARHEEL-24-030424 03/04/2024 320-110617-1
PFECA B
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-030424 03/04/2024 320-110617-1
R-PSDA
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-030424 03/04/2024 320-110617-1
Hydrolyzed PSDA
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-030424 03/04/2024 320-110617-1
R-PSDCA
0.0030
UG/L
PQL
0.0030
UJ
537 Modified
CFR-TARHEEL-24-030424 03/04/2024 320-110617-1
R-EVE
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-030424 03/04/2024 320-110617-1
PEPA
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-030424 03/04/2024 320-110617-1
PS Acid
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-012624 01/26/2024 320-109815-1
PF02HxA
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-012624 01/26/2024 320-109815-1
PF030A
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-012624 01/26/2024 320-109815-1
PF04DA
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-012624 01/26/2024 320-109815-1
PF05DA
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-030424 03/04/2024 320-110617-1
PF02HxA
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-030424 03/04/2024 320-110617-1
PF030A
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-030424 03/04/2024 320-110617-1
PF04DA
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
LABSTATS
Pre -prep
Prep
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
Page 3 of 7

Site: Fayetteville Sampling Program: 2024 Tarheel Sampling Validation Options
Validation Reason Code: The preparation hold time for this sample was exceeded. The reporting limit may be biased low.
Date
Validation
Analytical
Field Sample ID Sampled Lab Sample ID
Analyte
Result
Units
Type
MDL PQL
Qualifier
Method
CFR-TARHEEL-24-030424 03/04/2024 320-110617-1
PF05DA
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-030424 03/04/2024 320-110617-1
EVE Acid
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-030424 03/04/2024 320-110617-1
Hydro -PS Acid
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-030424 03/04/2024 320-110617-1
Hydro -EVE Acid
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-24-030424 03/04/2024 320-110617-1
NVHOS, Acid Form
0.0030
UG/L
PQL
0.0030
UJ
537 Modified
CFR-TARHEEL-24-030424 03/04/2024 320-110617-1
PFECA-G
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CFR-TARHEEL-12-011024 01/10/2024 320-109022-1
Perfluoro(2-
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
ethoxyethane)sulfonic
LABSTATS
Pre -prep
Prep
3535
3535
3535
3535
3535
3535
3535
Page 4 of 7

Site: Fayetteville
Validation Reason Code
Sampling Program: 2024 Tarheel Sampling Validation Options: LABSTATS
High relative percent difference (RPD) observed between LCS and LCSD samples. The reported result may be imprecise.
Date
Validation
Analytical
Field Sample ID Sampled Lab Sample ID
Analyte
Result
Units
Type
MDL PQL
Qualifier
Method
CFR-TARHEEL-24-022624 02/26/2024 320-110211-1
PF02HxA
0.0028
ug/L
PQL
0.0020
J
537 Modified
CFR-TARHEEL-24-022624 02/26/2024 320-110211-1
PFMOAA
0.0046
ug/L
PQL
0.0020
J
537 Modified
CFR-TARHEEL-24-022924 02/29/2024 320-110211-2
PF02HxA
0.0029
ug/L
PQL
0.0020
J
537 Modified
CFR-TARHEEL-24-022924 02/29/2024 320-110211-2
PFMOAA
0.0062
ug/L
PQL
0.0020
J
537 Modified
Pre -prep
Prep
3535
3535
3535
3535
Page 5 of 7

Site: Fayetteville Sampling Program: 2024 Tarheel Sampling Validation Options: LABSTATS
Validation Reason Code: High relative percent difference (RPD) observed between MS and MSD samples. The reported result may be imprecise.
Date Validation Analytical
Field Sample ID Sampled Lab Sample ID Analyte Result Units Type MDL PQL Qualifier Method Pre -prep Prep
CFR-TARHEEL-24-031224 03/12/2024 320-110617-3 PFMOAA 0.0026 ug/L PQL 0.0020 J 537 Modified 3535
Page 6 of 7

Site: Fayetteville Sampling Program: 2024 Tarheel Sampling Validation Options
Validation Reason Code: The preparation hold time for this sample was exceeded. The reported result may be biased low.
Date
Validation
Analytical
Field Sample ID Sampled Lab Sample ID
Analyte
Result
Units
Type
MDL PQL
Qualifier
Method
CFR-TARHEEL-12-011024 01/10/2024 320-109022-1
PMPA
0.0067
UG/L
PQL
0.0020
J
537 Modified
CFR-TARHEEL-12-011024 01/10/2024 320-109022-1
Hfpo Dimer Acid
0.0042
UG/L
PQL
0.0040
J
537 Modified
CFR-TARHEEL-24-030424 03/04/2024 320-110617-1
PPF Acid
0.0099
UG/L
PQL
0.0050
J
537 Modified
CFR-TARHEEL-24-030424 03/04/2024 320-110617-1
PPF Acid
0.0062
UG/L
PQL
0.0050
J
537 Modified
CFR-TARHEEL-24-030424 03/04/2024 320-110617-1
PFMOAA
0.0021
ug/L
PQL
0.0020
J
537 Modified
CFR-TARHEEL-24-012624 01/26/2024 320-109815-1
PPF Acid
0.0069
UG/L
PQL
0.0050
J
537 Modified
CFR-TARHEEL-24-012624 01/26/2024 320-109815-1
PPF Acid
0.011
UG/L
PQL
0.0050
J
537 Modified
CFR-TARHEEL-24-012624 01/26/2024 320-109815-1
PFMOAA
0.0023
ug/L
PQL
0.0020
J
537 Modified
CFR-TARHEEL-24-030424 03/04/2024 320-110617-1
Perfluoroheptanoic
0.0036
UG/L
PQL
0.0020
J
537 Modified
Acid
CFR-TARHEEL-24-012624 01/26/2024 320-109815-1
Perfluoroheptanoic
0.0030
UG/L
PQL
0.0020
J
537 Modified
Acid
CFR-TARHEEL-24-012624 01/26/2024 320-109815-1
PMPA
0.0021
UG/L
PQL
0.0020
J
537 Modified
CFR-TARHEEL-12-011024 01/10/2024 320-109022-1
PPF Acid
0.011
UG/L
PQL
0.0050
J
537 Modified
CFR-TARHEEL-12-011024 01/10/2024 320-109022-1
PPF Acid
0.017
UG/L
PQL
0.0050
J
537 Modified
CFR-TARHEEL-12-011024 01/10/2024 320-109022-1
PFMOAA
0.0045
ug/L
PQL
0.0020
J
537 Modified
CFR-TARHEEL-12-011024 01/10/2024 320-109022-1
Perfluoroheptanoic
0.0028
UG/L
PQL
0.0020
J
537 Modified
Acid
CFR-TARHEEL-12-011024 01/10/2024 320-109022-1
PF02HxA
0.0040
ug/L
PQL
0.0020
J
537 Modified
LABSTATS
Pre -prep
Prep
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
Page 7 of 7

ADQM Data Review
Site: Chemours Fayetteville
Project: CAP GW 1 Q24 Sampling
Project Reviewer: Bridget Gavaghan

Sample Summary
Field Sample ID
Lab Sample ID
Sample
Matrix
Filtered
Sample
Date
Sample
Time
Sample Purpose
CAP1 Q24-PIW-7D-01 1524
320-108762-1
Groundwater
N
01/15/2024
13:11
FS
CAP1 Q24-BLADEN-1 DR-01 1524
320-108762-10
Groundwater
N
01/15/2024
10:25
FS
CAP1 Q24-EQBLK-PP-01 1724
320-108762-11
Blank Water
N
01/17/2024
13:00
EB
CAP1 Q24-PIW-7D-01 1524-D
320-108762-2
Groundwater
N
01/15/2024
13:11
DUP
CAP1 Q24-PIW-7S-01 1524
320-108762-3
Groundwater
N
01/15/2024
15:20
FS
CAP1 Q24-SMW-1 2-011624
320-108762-4
Groundwater
N
01/16/2024
15:06
FS
CAP 1Q24-LTW-04-011624
320-108762-5
Groundwater
N
01/16/2024
13:05
FS
CAP1Q24-PZ-22-011624
320-108762-6
Groundwater
N
01/16/2024
15:20
FS
CAP1 Q24-PIW-1 S-01 1624
320-108762-7
Groundwater
N
01/16/2024
15:47
FS
CAP1Q24-PW-06-011524
320-108762-8
Groundwater
N
01/15/2024
14:35
FS
CAP 1Q24-LTW-05-011524
320-108762-9
Groundwater
N
01/15/2024
12:05
FS
CAP1Q24-PIW-1D-012224
320-109019-1
Groundwater
N
01/22/2024
12:04
FS
CAP1Q24-PIW-10DR-012224
320-109019-2
Groundwater
N
01/22/2024
11:00
FS
CAP1 Q24-PIW-4D-01 2224
320-109019-3
Groundwater
N
01/22/2024
14:45
FS
CAP1Q24-PIW-8D-012224
320-109019-4
Groundwater
N
01/22/2024
13:10
FS
CAP1 Q24-EQBLK-DV-01 2224
320-109019-5
Blank Water
N
01/22/2024
16:05
EB
CAP1 Q24-EQBLK-BAILER-01 2224
320-109019-6
Blank Water
N
01/22/2024
16:20
EB
CAP1 Q24-EQBLK-BAILER-01 2224-Z
320-109019-7
Blank Water
Y
01/22/2024
16:25
EB
CAP1Q24-LTW-01-011724
320-109020-1
Groundwater
N
01/17/2024
13:40
FS
CAP 1Q24-LTW-02-011724
320-109020-2
Groundwater
N
01/17/2024
12:40
FS
CAP1Q24-OW-37-011724
320-109020-3
Groundwater
N
01/17/2024
10:15
FS
CAP1Q24-SMW-10-011724
320-109020-4
Groundwater
N
01/17/2024
14:39
FS
CAP1Q24-PW-04-011724
320-109020-5
Groundwater
N
01/17/2024
15:55
FS
CAP1Q24-PW-04-011724-Z
320-109020-6
Groundwater
Y
01/17/2024
15:55
FS
CAP1 Q24-PIW-3D-01 1824
320-109020-7
Groundwater
N
01/18/2024
13:21
FS
CAP1 Q24-SMW-1 1-011824
320-109020-8
Groundwater
N
01/18/2024
15:25
FS
CAP1Q24-OW-28-011824
320-109020-9
Groundwater
N
01/18/2024
12:06
FS
CAP1Q24-PW-09-012324
320-109223-1
Groundwater
N
01/23/2024
14:40
FS
CAP1Q24-PW-09-012324-D
320-109223-2
Groundwater
N
01/23/2024
14:40
DUP
CAP1Q24-OW-32-012924
320-109381-1
Groundwater
N
01/29/2024
14:45
FS
CAP1Q24-PW-11-013124
320-109381-10
Groundwater
N
01/31/2024
14:27
FS
CAP1Q24-OW-4R-012924
320-109381-2
Groundwater
N
01/29/2024
11:00
FS
CAP1Q24-OW30-013024
320-109381-3
Groundwater
N
01/30/2024
15:15
FS
CAP1Q24-OW-40-013024
320-109381-4
Groundwater
N
01/30/2024
13:45
FS
CAP1Q24-OW-33-013024
320-109381-5
Groundwater
N
01/30/2024
12:14
FS
CAP1Q24-PW-10RR-013124
320-109381-6
Groundwater
N
01/31/2024
12:35
FS
CAP 1Q24-LTW-03-013124
320-109381-7
Groundwater
N
01/31/2024
11:05
FS
CAP1 Q24-PIW-6S-01 3124
320-109381-8
Groundwater
N
01/31/2024
12:47
FS
CAP1Q24-OW-51-013124
320-109381-9
Groundwater
N
01/31/2024
12:32
FS
CAP1Q24-OW-56-020124
320-109475-1
Groundwater
N
02/01/2024
15:00
FS

Field Sample ID
Lab Sample ID
Sample
Matrix
Filtered
Sample
Date
Sample
Time
Sample Purpose
CAP 1 Q24-PIW-1 1-020124
320-109475-2
Groundwater
N
02/01/2024
11:45
FS
CAP 1 Q24-EQBLK-B P-020224
320-109475-3
Blank Water
N
02/02/2024
10:50
EB
CAP1Q24-OW-55-020524
320-109475-4
Groundwater
N
02/05/2024
12:30
FS
CAP1 Q24-PIW-1 5-020524
320-109475-5
Groundwater
N
02/05/2024
15:10
FS
CAP1Q24-OW-54-020624
320-109475-6
Groundwater
N
02/06/2024
11:50
FS
CAP1Q24-OW-57-020624
320-109475-7
Groundwater
N
02/06/2024
13:25
FS
CAP1Q24-PW-07-020724
320-109816-1
Groundwater
N
02/07/2024
10:40
FS
FS=Field Sample
DUP=Field Duplicate
FB=Field Blank
EB=Equipment Blank
TB=Trip Blank

Analytical Protocol
Lab Name
Lab Method
Parameter Category
Sampling Program
Eurofins Environ Testing
537
Per- and Polyfluorinated Alkyl Substances
CAP GW Sampling
Northern Cali
Modified
PFAS
1Q24

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
X
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
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. Overall, 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.

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.)

DVM Narrative Report
Site: Fayetteville Sampling Program: CAP GW Sampling 1Q24 Validation Options: LABSTATS
Validation Reason Code: The preparation hold time for this sample was exceeded by a factor of 2. The reported result may be biased low.
Date
Validation
Analytical
Field Sample ID
Sampled Lab Sample ID
Analyte
Result
Units
Type
MDL PQL
Qualifier
Method
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Perfluoropentane
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
011524
Sulfonic Acid (PFPeS)
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
6:2 Fluorotelomer
0.0050
ug/L
PQL
0.0050
UJ
537 Modified
011524
sulfonate
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
PS Acid
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
011524
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
N-Ethyl Perfluorooctane
0.0050
UG/L
PQL
0.0050
UJ
537 Modified
011524
Sulfonamidoacetic Acid
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Perfluorohexanoic
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
011524
Acid
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Perfluorododecanoic
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
011524
Acid
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
N-methyl perfluoro-1-
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
011524
octanesulfonamide
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
PFOA
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
011524
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Perfluorodecanoic
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
011524
Acid
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Perfluorodecane
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
011524
Sulfonic Acid
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Perfluorohexane
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
011524
Sulfonic Acid
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Perfluorobutanoic Acid
0.0050
UG/L
PQL
0.0050
UJ
537 Modified
011524
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Perfluorobutane
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
011524
Sulfonic Acid
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Perfluoroheptanoic
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
011524
Acid
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Perfluoroheptane
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
011524
Sulfonic Acid (PFHpS)
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Perfluorononanoic
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
011524
Acid
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Perfluorotetradecanoic
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
011524
Acid
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
1H,1H,2H,2H-
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
011524
perFluorodecanesulfonate (8:2
FTS)
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Perfluoro(2-
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
011524
ethoxyethane)sulfonic
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
10:2 Fluorotelomer
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
011524
sulfonate
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
PFECA B
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
011524
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Perfluorooctadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
011524
Acid
Pre -prep
Prep
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
Page 1 of 22

Site: Fayetteville
Validation Reason Code
Sampling Program: CAP GW Sampling 1Q24 Validation Options: LABSTATS
The preparation hold time for this sample was exceeded by a factor of 2. The reported result may be biased low.
Date
Validation
Analytical
Field Sample ID
Sampled Lab Sample ID
Analyte
Result
Units
Type
MDL PQL
Qualifier
Method
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
2-(N-ethyl perfluoro-1-
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
011524
octanesulfonamido)-ethanol
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
PFOS
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
011524
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Perfluoroundecanoic
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
011524
Acid
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
N-Methyl Perfluorooctane
0.0050
UG/L
PQL
0.0050
UJ
537 Modified
011524
Sulfonamidoacetic Acid
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Hydrolyzed PSDA
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
011524
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
R-PSDCA
0.0030
UG/L
PQL
0.0030
UJ
537 Modified
011524
CAP1Q24-BLADEN-11DR-
01/15/2024 320-108762-10
2-(N-methyl perfluoro-1-
0.0040
ug/L
PQL
0.0040
UJ
537 Modified
011524
octanesulfonamido)-ethanol
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
PF04DA
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
011524
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
PF05DA
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
011524
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
N-ethylperfluoro-1-
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
011524
octanesulfonamide
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Perfluorohexadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
011524
Acid (PFHxDA)
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Perfluorononanesulfon
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
011524
is Acid
CAP1Q24-BLADEN-11DR-
01/15/2024 320-108762-10
EVE Acid
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
011524
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Perfluorotridecanoic
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
011524
Acid
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Hydro -PS Acid
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
011524
CAP1Q24-BLADEN-11DR-
01/15/2024 320-108762-10
Perfluorooctane
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
011524
Sulfonamide
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
9CI-PF30NS
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
011524
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
1H,1H,2H,2H-
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
011524
Pe rfluorohexanesulfonate (4:2
FTS)
CAP1Q24-BLADEN-11DR-
01/15/2024 320-108762-10
11CI-PF3OUdS
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
011524
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Hydro -EVE Acid
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
011524
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Perfluorododecane
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
011524
Sulfonic Acid (PFDoS)
CAP1Q24-BLADEN-11DR-
01/15/2024 320-108762-10
NVHOS, Acid Form
0.0030
UG/L
PQL
0.0030
UJ
537 Modified
011524
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
PFECA-G
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
011524
Pre -prep
Prep
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
Page 2 of 22

Site: Fayetteville
Validation Reason Code
Sampling Program: CAP GW Sampling 1Q24 Validation Options: LABSTATS
The preparation hold time for this sample was exceeded by a factor of 2. The reported result may be biased low.
Date
Validation
Analytical
Field Sample ID
Sampled Lab Sample ID
Analyte
Result
Units
Type
MDL PQL
Qualifier
Method
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
DONA
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
011524
CAP1Q24-EQBLK-BP-
02/02/2024 320-109475-3
Perfluorooctadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
020224
Acid
CAP1Q24-EQBLK-BP-
02/02/2024 320-109475-3
Perfluorooctadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
020224
Acid
CAP1Q24-EQBLK-BP-
02/02/2024 320-109475-3
PS Acid
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
020224
CAP1Q24-EQBLK-BP-
02/02/2024 320-109475-3
PS Acid
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
020224
CAP1Q24-EQBLK-BP-
02/02/2024 320-109475-3
EVE Acid
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
020224
CAP1Q24-EQBLK-BP-
02/02/2024 320-109475-3
EVE Acid
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
020224
CAP 1Q24-LTW-03-013124
01/31/2024 320-109381-7
PS Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP 1Q24-LTW-03-013124
01/31/2024 320-109381-7
EVE Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1Q24-OW-33-013024
01/30/2024 320-109381-5
PS Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1Q24-OW-33-013024
01/30/2024 320-109381-5
EVE Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1Q24-OW-32-012924
01/29/2024 320-109381-1
PS Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1Q24-OW-32-012924
01/29/2024 320-109381-1
EVE Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1Q24-OW-40-013024
01/30/2024 320-109381-4
PS Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1Q24-OW-40-013024
01/30/2024 320-109381-4
EVE Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1Q24-OW-4R-012924
01/29/2024 320-109381-2
PS Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1Q24-OW-4R-012924
01/29/2024 320-109381-2
EVE Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1Q24-OW-51-013124
01/31/2024 320-109381-9
PS Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1Q24-OW-51-013124
01/31/2024 320-109381-9
EVE Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1Q24-OW-54-020624
02/06/2024 320-109475-6
PS Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1Q24-OW-54-020624
02/06/2024 320-109475-6
EVE Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1Q24-OW-55-020524
02/05/2024 320-109475-4
PS Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1Q24-OW-55-020524
02/05/2024 320-109475-4
EVE Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
Pre -prep
Prep
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
Page 3 of 22

Site: Fayetteville
Validation Reason Code
Sampling Program: CAP GW Sampling 1Q24 Validation Options: LABSTATS
The preparation hold time for this sample was exceeded by a factor of 2. The reported result may be biased low.
Date
Validation
Analytical
Field Sample ID
Sampled Lab Sample ID
Analyte
Result
Units
Type
MDL PQL
Qualifier
Method
CAP1Q24-OW-56-020124
02/01/2024 320-109475-1
PS Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1Q24-OW-56-020124
02/01/2024 320-109475-1
EVE Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1Q24-OW30-013024
01/30/2024 320-109381-3
PS Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1Q24-OW30-013024
01/30/2024 320-109381-3
EVE Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1 Q24-PIW-1 5-020524
02/05/2024 320-109475-5
PS Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1 Q24-PIW-1 5-020524
02/05/2024 320-109475-5
EVE Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1Q24-OW-57-020624
02/06/2024 320-109475-7
EVE Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1 Q24-PIW-1 1-020124
02/01/2024 320-109475-2
PS Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1 Q24-PIW-1 1-020124
02/01/2024 320-109475-2
EVE Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1Q24-PIW-6S-013124
01/31/2024 320-109381-8
PS Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1Q24-PIW-6S-013124
01/31/2024 320-109381-8
EVE Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluoro(2-
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
ethoxyethane)sulfonic
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
10:2 Fluorotelomer
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
sulfonate
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PFECA B
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorooctadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
2-(N-ethyl perfluoro-1-
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
octanesu Ifonamido)-ethanol
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PFOS
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluoroundecanoic
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
N-Methyl Perfluorooctane
0.0050
UG/L
PQL
0.0050
UJ
537 Modified
Sulfonamidoacetic Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluoropentane
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
Sulfonic Acid (PFPeS)
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
6:2 Fluorotelomer
0.0050
ug/L
PQL
0.0050
UJ
537 Modified
sulfonate
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PS Acid
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
N-Ethyl Perfluorooctane
0.0050
UG/L
PQL
0.0050
UJ
537 Modified
Sulfonamidoacetic Acid
Pre -prep
Prep
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
Page 4 of 22

Site: Fayetteville
Validation Reason Code
Sampling Program: CAP GW Sampling 1Q24 Validation Options: LABSTATS
The preparation hold time for this sample was exceeded by a factor of 2. The reported result may be biased low.
Date
Validation
Analytical
Field Sample ID
Sampled Lab Sample ID
Analyte
Result
Units
Type
MDL PQL
Qualifier
Method
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorohexanoic
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorododecanoic
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
N-methyl perfluoro-1-
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
octanesulfonamide
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Hydrolyzed PSDA
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
R-PSDCA
0.0030
UG/L
PQL
0.0030
UJ
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
2-(N-methyl perfluoro-1-
0.0040
ug/L
PQL
0.0040
UJ
537 Modified
octanesu Ifonamido)-ethanol
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorodecanoic
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorodecane
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
Sulfonic Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorohexane
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
Sulfonic Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorobutane
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
Sulfonic Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluoroheptane
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
Sulfonic Acid (PFHpS)
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorononanoic
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorotetradecanoic
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
1H,1H,2H,2H-
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
perfluorodecanesulfonate (8:2
FTS)
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PF05DA
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
N-ethylperfluoro-1-
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
octanesulfonamide
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorohexadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
Acid (PFHxDA)
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorononanesulfon
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
is Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
EVE Acid
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorotridecanoic
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorooctane
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
Sulfonamide
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
9CI-PF30NS
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
1H,1H,2H,2H-
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
perfluorohexanesulfonate (4:2
FTS)
Pre -prep
Prep
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
Page 5 of 22

Site: Fayetteville
Validation Reason Code
Sampling Program: CAP GW Sampling 1Q24 Validation Options: LABSTATS
The preparation hold time for this sample was exceeded by a factor of 2. The reported result may be biased low.
Date
Validation
Analytical
Field Sample ID
Sampled Lab Sample ID
Analyte
Result
Units
Type
MDL PQL
Qualifier
Method
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
11CI-PF3OUdS
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorododecane
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
Sulfonic Acid (PFDoS)
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
NVHOS, Acid Form
0.0030
UG/L
PQL
0.0030
UJ
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PFECA-G
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
DONA
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
CAP1Q24-PW-10RR-
01/31/2024 320-109381-6
PS Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
013124
CAP1Q24-PW-10RR-
01/31/2024 320-109381-6
EVE Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
013124
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PF030A
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
CAP1Q24-PW-11-013124 01/31/2024 320-109381-10 EVE Acid 0.050 UG/L PQL 0.050 UJ 537 Modified
Pre -prep
Prep
3535
3535
3535
3535
3535
3535
3535
3535
3535
Page 6 of 22

Site: Fayetteville
Sampling Program:
CAP GW Sampling 1Q24
Validation Options: LABSTATS
Validation Reason Code: Associated MS and/or MSD analysis had relative percent recovery (RPR) values less than the lower control limit but above the rejection limit. The reported result may be
biased low.
Date
Validation Analytical
Field Sample ID
Sampled Lab Sample ID
Analyte
Result Units Type MDL
PQL Qualifier Method Pre -prep Prep
CAP1Q24-OW-56-020124
02/01/2024 320-109475-1
PS Acid
0.050 UG/L PQL
0.050 UJ 537 Modified 3535
CAP1Q24-OW-56-020124
02/01/2024 320-109475-1
EVE Acid
0.050 UG/L PQL
0.050 UJ 537 Modified 3535
Page 7 of 22

Site: Fayetteville
Sampling Program:
CAP GW Sampling 1Q24
Validation Options: LABSTATS
Validation Reason Code: Associated LCS and/or LCSD analysis had relative
percent recovery (RPR) values less than the lower control limit
but above 10%. The actual detection limits may be higher
than reported.
Date
Validation
Analytical
Field Sample ID
Sampled Lab Sample ID
Analyte
Result
Units
Type MDL
PQL
Qualifier
Method Pre -prep
Prep
CAP1Q24-EQBLK-BP-
02/02/2024 320-109475-3
Perfluorooctadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
3535
020224
Acid
CAP1Q24-EQBLK-BP-
02/02/2024 320-109475-3
PS Acid
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
3535
020224
CAP1Q24-EQBLK-BP-
02/02/2024 320-109475-3
EVE Acid
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
3535
020224
CAP1Q24-OW-54-020624
02/06/2024 320-109475-6
PS Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
3535
CAP1Q24-OW-54-020624
02/06/2024 320-109475-6
EVE Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
3535
CAP1Q24-OW-55-020524
02/05/2024 320-109475-4
PS Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
3535
CAP1Q24-OW-55-020524
02/05/2024 320-109475-4
EVE Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
3535
CAP1 Q24-PIW-1 5-020524
02/05/2024 320-109475-5
PS Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
3535
CAP1 Q24-PIW-1 5-020524
02/05/2024 320-109475-5
EVE Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
3535
CAP1Q24-OW-57-020624
02/06/2024 320-109475-7
EVE Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
3535
CAP1 Q24-PIW-1 1-020124
02/01/2024 320-109475-2
PS Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
3535
CAP1 Q24-PIW-1 1-020124
02/01/2024 320-109475-2
EVE Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
3535
Page 8 of 22

Site: Fayetteville Sampling Program: CAP GW Sampling 1Q24 Validation Options: LABSTATS
Validation Reason Code: Associated MS and/or MSD analysis had relative percent recovery (RPR) values less than the lower control limit. The actual detection limits may be higher than reported.
Date
Field Sample ID Sampled Lab Sample ID Analyte
CAP1Q24-OW-32-012924 01/29/2024 320-109381-1 Perfluorononanoic
Acid
CAP1Q24-PW-09-012324 01/23/2024 320-109223-1 Perfluorobutanoic Acid
Validation Analytical
Result Units Type MDL PQL Qualifier Method Pre -prep
0.034 UG/L PQL 0.034 UJ 537 Modified
0.0050 UG/L PQL 0.0050 UJ 537 Modified
Prep
3535
3535
Page 9 of 22

Site: Fayetteville Sampling Program: CAP GW Sampling 1Q24 Validation Options: LABSTATS
Validation Reason Code: The preparation hold time for this sample was exceeded. The reporting limit may be biased low.
Date
Field Sample ID
Sampled Lab Sample ID
Analyte
Result
Units
Type
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
PPF Acid
0.31
UG/L
PQL
011524
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
PPF Acid
0.31
UG/L
PQL
011524
CAP1Q24-PIW-7D-011524- 01/15/2024 320-108762-2
6:2 Fluorotelomer
0.31
ug/L
PQL
D
sulfonate
CAP1Q24-PW-06-011524
01/15/2024 320-108762-8
6:2 Fluorotelomer
0.31
ug/L
PQL
sulfonate
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluoro(2-
0.036
UG/L
PQL
ethoxyethane)sulfonic
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
10:2 Fluorotelomer
0.084
ug/L
PQL
sulfonate
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PFECA B
0.078
UG/L
PQL
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorooctadecanoic
0.12
ug/L
PQL
Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
2-(N-ethyl perfluoro-1-
0.11
ug/L
PQL
octanesu Ifonamido)-ethanol
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PFOS
0.068
UG/L
PQL
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluoroundecanoic
0.14
UG/L
PQL
Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
N-Methyl Perfluorooctane
0.15
UG/L
PQL
Sulfonamidoacetic Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluoropentane
0.038
ug/L
PQL
Sulfonic Acid (PFPeS)
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
6:2 Fluorotelomer
0.31
ug/L
PQL
sulfonate
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PS Acid
0.050
UG/L
PQL
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
N-Ethyl Perfluorooctane
0.16
UG/L
PQL
Sulfonamidoacetic Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorohexanoic
0.073
UG/L
PQL
Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorododecanoic
0.069
UG/L
PQL
Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
N-methyl perfluoro-1-
0.054
ug/L
PQL
octanesulfonamide
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PFOA
0.11
UG/L
PQL
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Hydrolyzed PSDA
0.034
UG/L
PQL
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
R-PSDCA
0.18
UG/L
PQL
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
R-EVE
0.039
UG/L
PQL
Validation
Analytical
MDL PQL
Qualifier
Method
0.31
UJ
537 Modified
0.31
UJ
537 Modified
0.31
UJ
537 Modified
0.31
UJ
537 Modified
0.036
UJ
537 Modified
0.084
UJ
537 Modified
0.078
UJ
537 Modified
0.12
UJ
537 Modified
0.11
UJ
537 Modified
0.068
UJ
537 Modified
0.14
UJ
537 Modified
0.15
UJ
537 Modified
0.038
UJ
537 Modified
0.31
UJ
537 Modified
0.050
UJ
537 Modified
0.16
UJ
537 Modified
0.073
UJ
537 Modified
0.069
UJ
537 Modified
0.054
UJ
537 Modified
0.11
UJ
537 Modified
0.034
UJ
537 Modified
0.18
UJ
537 Modified
0.039
UJ
537 Modified
Pre -prep
Prep
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
Page 10 of 22

Site: Fayetteville Sampling Program: CAP GW Sampling 1Q24 Validation Options: LABSTATS
Validation Reason Code: The preparation hold time for this sample was exceeded. The reporting limit may be biased low.
Date
Field Sample ID
Sampled Lab Sample ID
Analyte
Result
Units
Type
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
2-(N-methyl perfluoro-1-
0.18
ug/L
PQL
octanesulfonamido)-ethanol
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PEPA
0.060
UG/L
PQL
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorodecanoic
0.039
UG/L
PQL
Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorodecane
0.040
UG/L
PQL
Sulfonic Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorohexane
0.071
UG/L
PQL
Sulfonic Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorobutanoic Acid
0.30
UG/L
PQL
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Hfpo Dimer Acid
0.19
UG/L
PQL
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluoropentanoic
0.061
UG/L
PQL
Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorobutane
0.025
UG/L
PQL
Sulfonic Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluoroheptanoic
0.031
UG/L
PQL
Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluoroheptane
0.024
ug/L
PQL
Sulfonic Acid (PFHpS)
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorononanoic
0.034
UG/L
PQL
Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorotetradecanoic
0.091
UG/L
PQL
Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
1H,1H,2H,2H-
0.058
ug/L
PQL
perfluorodecanesulfonate (8:2
FTS)
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PF05DA
0.13
ug/L
PQL
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
N-ethylperfluoro-1-
0.11
UG/L
PQL
octanesulfonamide
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorohexadecanoic
0.11
ug/L
PQL
Acid (PFHxDA)
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorononanesulfon
0.046
ug/L
PQL
is Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
EVE Acid
0.050
UG/L
PQL
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorotridecanoic
0.16
UG/L
PQL
Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Hydro -PS Acid
0.055
ug/L
PQL
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorooctane
0.12
UG/L
PQL
Sulfonamide
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
9CI-PF30NS
0.030
ug/L
PQL
Validation
Analytical
MDL PQL
Qualifier
Method
0.18
UJ
537 Modified
0.060
UJ
537 Modified
0.039
UJ
537 Modified
0.040
UJ
537 Modified
0.071
UJ
537 Modified
0.30
UJ
537 Modified
0.19
UJ
537 Modified
0.061
UJ
537 Modified
0.025
UJ
537 Modified
0.031
UJ
537 Modified
0.024
UJ
537 Modified
0.034
UJ
537 Modified
0.091
UJ
537 Modified
0.058
UJ
537 Modified
0.13
UJ
537 Modified
0.11
UJ
537 Modified
0.11
UJ
537 Modified
0.046
UJ
537 Modified
0.050
UJ
537 Modified
0.16
UJ
537 Modified
0.055
UJ
537 Modified
0.12
UJ
537 Modified
0.030
UJ
537 Modified
Pre -prep
Prep
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
Page 11 of 22

Site: Fayetteville Sampling Program: CAP GW Sampling 1Q24 Validation Options
Validation Reason Code: The preparation hold time for this sample was exceeded. The reporting limit may be biased low.
Date
Validation
Analytical
Field Sample ID
Sampled Lab Sample ID
Analyte
Result
Units
Type
MDL PQL
Qualifier
Method
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
1H,1H,2H,2H-
0.030
ug/L
PQL
0.030
UJ
537 Modified
perFluorohexanesulfonate (4:2
FTS)
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
11CI-PF3OUdS
0.040
ug/L
PQL
0.040
UJ
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Hydro -EVE Acid
0.030
UG/L
PQL
0.030
UJ
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorododecane
0.12
ug/L
PQL
0.12
UJ
537 Modified
Sulfonic Acid (PFDoS)
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
NVHOS, Acid Form
0.16
UG/L
PQL
0.16
UJ
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PFECA-G
0.036
UG/L
PQL
0.036
UJ
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
DONA
0.050
ug/L
PQL
0.050
UJ
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PF030A
0.11
ug/L
PQL
0.11
UJ
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PF04DA
0.050
ug/L
PQL
0.050
UJ
537 Modified
CAP1Q24-PZ-22-011624
01/16/2024 320-108762-6
6:2 Fluorotelomer
0.31
ug/L
PQL
0.31
UJ
537 Modified
sulfonate
LABSTATS
Pre -prep
Prep
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
Page 12 of 22

Site: Fayetteville
Validation Reason Code
Sampling Program: CAP GW Sampling 1Q24 Validation Options: LABSTATS
High relative percent difference (RPD) observed between LCS and LCSD samples. The reported result may be imprecise.
Date
Validation
Analytical
Field Sample ID
Sampled Lab Sample ID
Analyte
Result Units
Type
MDL PQL
Qualifier
Method
CAP1Q24-PZ-22-011624
01/16/2024 320-108762-6
PPF Acid
72 UG/L
PQL
0.31
J
537 Modified
CAP1Q24-PIW-7D-011524-
01/15/2024 320-108762-2
PPF Acid
73 UG/L
PQL
0.31
J
537 Modified
D
CAP1Q24-PIW-7D-011524
01/15/2024 320-108762-1
PPF Acid
71 UG/L
PQL
0.31
J
537 Modified
Pre -prep
Prep
3535
3535
3535
Page 13 of 22

Site: Fayetteville
Sampling Program:
CAP GW Sampling 1Q24
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
Prep
CAP1Q24-SMW-11-
01/18/2024 320-109020-8
R-PSDA
0.12
UG/L
PQL
0.035
J
537 Modified
3535
011824
CAP1Q24-SMW-11-
01/18/2024 320-109020-8
R-PSDA
0.12
UG/L
PQL
0.035
J
537 Modified
3535
011824
CAP1Q24-SMW-11-
01/18/2024 320-109020-8
Hydrolyzed PSDA
0.088
UG/L
PQL
0.034
J
537 Modified
3535
011824
CAP1Q24-SMW-11-
01/18/2024 320-109020-8
Hydrolyzed PSDA
0.088
UG/L
PQL
0.034
J
537 Modified
3535
011824
CAP1Q24-SMW-11-
01/18/2024 320-109020-8
R-EVE
0.088
UG/L
PQL
0.039
J
537 Modified
3535
011824
CAP1Q24-SMW-11-
01/18/2024 320-109020-8
R-EVE
0.088
UG/L
PQL
0.039
J
537 Modified
3535
011824
CAP1Q24-SMW-12-
01/16/2024 320-108762-4
R-PSDA
0.065
UG/L
PQL
0.035
J
537 Modified
3535
011624
CAP1Q24-SMW-12-
01/16/2024 320-108762-4
R-EVE
0.045
UG/L
PQL
0.039
J
537 Modified
3535
011624
CAP1Q24-PZ-22-011624
01/16/2024 320-108762-6
R-PSDA
0.44
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-PZ-22-011624
01/16/2024 320-108762-6
Hydrolyzed PSDA
1.1
UG/L
PQL
0.034
J
537 Modified
3535
CAP1Q24-PZ-22-011624
01/16/2024 320-108762-6
R-EVE
0.30
UG/L
PQL
0.039
J
537 Modified
3535
CAP1Q24-PW-11-013124
01/31/2024 320-109381-10
R-PSDA
0.30
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-PW-11-013124
01/31/2024 320-109381-10
Hydrolyzed PSDA
0.85
UG/L
PQL
0.034
J
537 Modified
3535
CAP1Q24-PW-11-013124
01/31/2024 320-109381-10
R-EVE
0.11
UG/L
PQL
0.039
J
537 Modified
3535
CAP1Q24-PW-10RR-
01/31/2024 320-109381-6
R-PSDA
0.084
UG/L
PQL
0.035
J
537 Modified
3535
013124
CAP1Q24-PW-10RR-
01/31/2024 320-109381-6
Hydrolyzed PSDA
0.084
UG/L
PQL
0.034
J
537 Modified
3535
013124
CAP1Q24-PW-10RR-
01/31/2024 320-109381-6
R-EVE
0.12
UG/L
PQL
0.039
J
537 Modified
3535
013124
CAP1Q24-PIW-7S-011524
01/15/2024 320-108762-3
R-PSDA
0.79
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-PIW-7S-011524
01/15/2024 320-108762-3
Hydrolyzed PSDA
0.045
UG/L
PQL
0.034
J
537 Modified
3535
CAP1Q24-PIW-7S-011524
01/15/2024 320-108762-3
R-EVE
0.88
UG/L
PQL
0.039
J
537 Modified
3535
CAP1Q24-PIW-8D-012224
01/22/2024 320-109019-4
R-PSDA
2.6
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-PIW-8D-012224
01/22/2024 320-109019-4
Hydrolyzed PSDA
5.3
UG/L
PQL
0.034
J
537 Modified
3535
CAP1Q24-PIW-8D-012224
01/22/2024 320-109019-4
R-EVE
2.3
UG/L
PQL
0.039
J
537 Modified
3535
Page 14 of 22

Site: Fayetteville
Sampling Program:
CAP GW Sampling 1Q24
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
Prep
CAP1Q24-PW-04-011724
01/17/2024 320-109020-5
R-PSDA
0.13
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-PW-04-011724
01/17/2024 320-109020-5
R-PSDA
0.13
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-PW-04-011724
01/17/2024 320-109020-5
R-EVE
0.066
UG/L
PQL
0.039
J
537 Modified
3535
CAP1Q24-PW-04-011724
01/17/2024 320-109020-5
R-EVE
0.066
UG/L
PQL
0.039
J
537 Modified
3535
CAP 1Q24-PW-04-011724-
01/17/2024 320-109020-6
R-PSDA
0.13
UG/L
PQL
0.035
J
537 Modified
3535
Z
CAP 1Q24-PW-04-011724-
01/17/2024 320-109020-6
R-PSDA
0.13
UG/L
PQL
0.035
J
537 Modified
3535
Z
CAP 1Q24-PW-04-011724-
01/17/2024 320-109020-6
R-EVE
0.065
UG/L
PQL
0.039
J
537 Modified
3535
Z
CAP 1Q24-PW-04-011724-
01/17/2024 320-109020-6
R-EVE
0.065
UG/L
PQL
0.039
J
537 Modified
3535
Z
CAP1Q24-PW-06-011524
01/15/2024 320-108762-8
R-PSDA
0.042
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-PIW-7D-011524
01/15/2024 320-108762-1
R-PSDA
0.57
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-PIW-7D-011524
01/15/2024 320-108762-1
Hydrolyzed PSDA
1.1
UG/L
PQL
0.034
J
537 Modified
3535
CAP1Q24-PIW-7D-011524
01/15/2024 320-108762-1
R-EVE
0.54
UG/L
PQL
0.039
J
537 Modified
3535
CAP1Q24-PIW-7D-011524-
01/15/2024 320-108762-2
R-PSDA
0.56
UG/L
PQL
0.035
J
537 Modified
3535
D
CAP1Q24-PIW-7D-011524-
01/15/2024 320-108762-2
Hydrolyzed PSDA
1.1
UG/L
PQL
0.034
J
537 Modified
3535
D
CAP1Q24-PIW-7D-011524-
01/15/2024 320-108762-2
R-EVE
0.60
UG/L
PQL
0.039
J
537 Modified
3535
D
CAP1 Q24-PIW-1 5-020524
02/05/2024 320-109475-5
R-PSDA
0.19
UG/L
PQL
0.035
J
537 Modified
3535
CAP1 Q24-PIW-1 5-020524
02/05/2024 320-109475-5
R-EVE
0.13
UG/L
PQL
0.039
J
537 Modified
3535
CAP1Q24-OW30-013024
01/30/2024 320-109381-3
R-PSDA
0.34
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-OW30-013024
01/30/2024 320-109381-3
Hydrolyzed PSDA
0.52
UG/L
PQL
0.034
J
537 Modified
3535
CAP1Q24-OW30-013024
01/30/2024 320-109381-3
R-EVE
0.27
UG/L
PQL
0.039
J
537 Modified
3535
CAP1Q24-PIW-1D-012224
01/22/2024 320-109019-1
R-PSDA
0.38
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-PIW-1D-012224
01/22/2024 320-109019-1
R-EVE
0.18
UG/L
PQL
0.039
J
537 Modified
3535
CAP1Q24-PIW-1S-011624
01/16/2024 320-108762-7
R-PSDA
0.11
UG/L
PQL
0.035
J
537 Modified
3535
Page 15 of 22

Site: Fayetteville Sampling Program: CAP GW Sampling 1Q24 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
Prep
CAP1Q24-PIW-3D-011824
01/18/2024 320-109020-7
R-PSDA
0.78
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-PIW-3D-011824
01/18/2024 320-109020-7
R-PSDA
0.78
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-PIW-3D-011824
01/18/2024 320-109020-7
Hydrolyzed PSDA
0.47
UG/L
PQL
0.034
J
537 Modified
3535
CAP1Q24-PIW-3D-011824
01/18/2024 320-109020-7
Hydrolyzed PSDA
0.47
UG/L
PQL
0.034
J
537 Modified
3535
CAP1Q24-PIW-3D-011824
01/18/2024 320-109020-7
R-EVE
0.39
UG/L
PQL
0.039
J
537 Modified
3535
CAP1Q24-PIW-3D-011824
01/18/2024 320-109020-7
R-EVE
0.39
UG/L
PQL
0.039
J
537 Modified
3535
CAP1Q24-PIW-4D-012224
01/22/2024 320-109019-3
R-PSDA
0.020
UG/L
PQL
0.0020
J
537 Modified
3535
CAP1Q24-PIW-4D-012224
01/22/2024 320-109019-3
Hydrolyzed PSDA
0.080
UG/L
PQL
0.0020
J
537 Modified
3535
CAP1Q24-PIW-4D-012224
01/22/2024 320-109019-3
R-EVE
0.012
UG/L
PQL
0.0020
J
537 Modified
3535
CAP1Q24-PIW-6S-013124
01/31/2024 320-109381-8
R-PSDA
0.73
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-PIW-6S-013124
01/31/2024 320-109381-8
Hydrolyzed PSDA
4.3
UG/L
PQL
0.034
J
537 Modified
3535
CAP1Q24-PIW-6S-013124
01/31/2024 320-109381-8
R-EVE
0.36
UG/L
PQL
0.039
J
537 Modified
3535
CAP1Q24-PIW-10DR-
01/22/2024 320-109019-2
R-PSDA
0.61
UG/L
PQL
0.035
J
537 Modified
3535
012224
CAP1Q24-PIW-10DR-
01/22/2024 320-109019-2
Hydrolyzed PSDA
2.3
UG/L
PQL
0.034
J
537 Modified
3535
012224
CAP1Q24-PIW-10DR-
01/22/2024 320-109019-2
R-EVE
0.40
UG/L
PQL
0.039
J
537 Modified
3535
012224
CAP1 Q24-PIW-1 1-020124
02/01/2024 320-109475-2
R-PSDA
0.23
UG/L
PQL
0.035
J
537 Modified
3535
CAP1 Q24-PIW-1 1-020124
02/01/2024 320-109475-2
Hydrolyzed PSDA
2.8
UG/L
PQL
0.034
J
537 Modified
3535
CAP1 Q24-PIW-1 1-020124
02/01/2024 320-109475-2
R-EVE
0.077
UG/L
PQL
0.039
J
537 Modified
3535
CAP1Q24-OW-57-020624
02/06/2024 320-109475-7
R-PSDA
1.2
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-OW-57-020624
02/06/2024 320-109475-7
Hydrolyzed PSDA
15
UG/L
PQL
0.034
J
537 Modified
3535
CAP1Q24-OW-57-020624
02/06/2024 320-109475-7
R-EVE
0.21
UG/L
PQL
0.039
J
537 Modified
3535
CAP1Q24-OW-56-020124
02/01/2024 320-109475-1
R-PSDA
0.14
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-OW-56-020124
02/01/2024 320-109475-1
R-EVE
0.11
UG/L
PQL
0.039
J
537 Modified
3535
Page 16 of 22

Site: Fayetteville Sampling Program: CAP GW Sampling 1Q24 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
Prep
CAP1Q24-OW-55-020524
02/05/2024 320-109475-4
R-PSDA
0.10
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-OW-55-020524
02/05/2024 320-109475-4
R-EVE
0.085
UG/L
PQL
0.039
J
537 Modified
3535
CAP1Q24-OW-54-020624
02/06/2024 320-109475-6
R-PSDA
0.078
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-OW-54-020624
02/06/2024 320-109475-6
R-EVE
0.042
UG/L
PQL
0.039
J
537 Modified
3535
CAP1Q24-OW-51-013124
01/31/2024 320-109381-9
R-PSDA
0.65
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-OW-51-013124
01/31/2024 320-109381-9
Hydrolyzed PSDA
1.4
UG/L
PQL
0.034
J
537 Modified
3535
CAP1Q24-OW-51-013124
01/31/2024 320-109381-9
R-EVE
0.70
UG/L
PQL
0.039
J
537 Modified
3535
CAP1Q24-OW-4R-012924
01/29/2024 320-109381-2
R-PSDA
0.57
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-OW-4R-012924
01/29/2024 320-109381-2
Hydrolyzed PSDA
2.3
UG/L
PQL
0.034
J
537 Modified
3535
CAP1Q24-OW-4R-012924
01/29/2024 320-109381-2
R-EVE
0.39
UG/L
PQL
0.039
J
537 Modified
3535
CAP1Q24-OW-33-013024
01/30/2024 320-109381-5
R-PSDA
0.21
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-OW-33-013024
01/30/2024 320-109381-5
Hydrolyzed PSDA
0.038
UG/L
PQL
0.034
J
537 Modified
3535
CAP1Q24-OW-33-013024
01/30/2024 320-109381-5
R-EVE
0.14
UG/L
PQL
0.039
J
537 Modified
3535
CAP1Q24-OW-37-011724
01/17/2024 320-109020-3
R-PSDA
0.10
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-OW-37-011724
01/17/2024 320-109020-3
R-PSDA
0.10
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-OW-37-011724
01/17/2024 320-109020-3
Hydrolyzed PSDA
0.083
UG/L
PQL
0.034
J
537 Modified
3535
CAP1Q24-OW-37-011724
01/17/2024 320-109020-3
Hydrolyzed PSDA
0.083
UG/L
PQL
0.034
J
537 Modified
3535
CAP1Q24-OW-40-013024
01/30/2024 320-109381-4
R-PSDA
0.20
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-OW-40-013024
01/30/2024 320-109381-4
Hydrolyzed PSDA
0.065
UG/L
PQL
0.034
J
537 Modified
3535
CAP1Q24-OW-40-013024
01/30/2024 320-109381-4
R-EVE
0.10
UG/L
PQL
0.039
J
537 Modified
3535
CAP 1Q24-LTW-04-011624
01/16/2024 320-108762-5
R-PSDA
1.4
UG/L
PQL
0.035
J
537 Modified
3535
CAP 1Q24-LTW-04-011624
01/16/2024 320-108762-5
Hydrolyzed PSDA
2.8
UG/L
PQL
0.034
J
537 Modified
3535
CAP 1Q24-LTW-04-011624
01/16/2024 320-108762-5
R-EVE
1.1
UG/L
PQL
0.039
J
537 Modified
3535
Page 17 of 22

Site: Fayetteville Sampling Program: CAP GW Sampling 1Q24 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
Prep
CAP 1Q24-LTW-05-011524
01/15/2024 320-108762-9
R-PSDA
1.3
UG/L
PQL
0.035
J
537 Modified
3535
CAP 1Q24-LTW-05-011524
01/15/2024 320-108762-9
Hydrolyzed PSDA
2.6
UG/L
PQL
0.034
J
537 Modified
3535
CAP 1Q24-LTW-05-011524
01/15/2024 320-108762-9
R-EVE
1.5
UG/L
PQL
0.039
J
537 Modified
3535
CAP1Q24-OW-28-011824
01/18/2024 320-109020-9
R-PSDA
0.28
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-OW-28-011824
01/18/2024 320-109020-9
R-PSDA
0.28
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-OW-28-011824
01/18/2024 320-109020-9
R-EVE
0.12
UG/L
PQL
0.039
J
537 Modified
3535
CAP1Q24-OW-28-011824
01/18/2024 320-109020-9
R-EVE
0.12
UG/L
PQL
0.039
J
537 Modified
3535
CAP1Q24-OW-32-012924
01/29/2024 320-109381-1
R-PSDA
0.22
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-OW-32-012924
01/29/2024 320-109381-1
Hydrolyzed PSDA
0.65
UG/L
PQL
0.034
J
537 Modified
3535
CAP1Q24-OW-32-012924
01/29/2024 320-109381-1
R-EVE
0.14
UG/L
PQL
0.039
J
537 Modified
3535
CAP1Q24-LTW-01-011724
01/17/2024 320-109020-1
R-PSDA
0.83
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-LTW-01-011724
01/17/2024 320-109020-1
R-PSDA
0.83
UG/L
PQL
0.035
J
537 Modified
3535
CAP1Q24-LTW-01-011724
01/17/2024 320-109020-1
Hydrolyzed PSDA
0.083
UG/L
PQL
0.034
J
537 Modified
3535
CAP1Q24-LTW-01-011724
01/17/2024 320-109020-1
Hydrolyzed PSDA
0.083
UG/L
PQL
0.034
J
537 Modified
3535
CAP1Q24-LTW-01-011724
01/17/2024 320-109020-1
R-EVE
0.31
UG/L
PQL
0.039
J
537 Modified
3535
CAP1Q24-LTW-01-011724
01/17/2024 320-109020-1
R-EVE
0.31
UG/L
PQL
0.039
J
537 Modified
3535
CAP 1Q24-LTW-02-011724
01/17/2024 320-109020-2
R-PSDA
0.78
UG/L
PQL
0.035
J
537 Modified
3535
CAP 1Q24-LTW-02-011724
01/17/2024 320-109020-2
R-PSDA
0.78
UG/L
PQL
0.035
J
537 Modified
3535
CAP 1Q24-LTW-02-011724
01/17/2024 320-109020-2
Hydrolyzed PSDA
1.8
UG/L
PQL
0.034
J
537 Modified
3535
CAP 1Q24-LTW-02-011724
01/17/2024 320-109020-2
Hydrolyzed PSDA
1.8
UG/L
PQL
0.034
J
537 Modified
3535
CAP 1Q24-LTW-02-011724
01/17/2024 320-109020-2
R-EVE
0.44
UG/L
PQL
0.039
J
537 Modified
3535
CAP 1Q24-LTW-02-011724
01/17/2024 320-109020-2
R-EVE
0.44
UG/L
PQL
0.039
J
537 Modified
3535
CAP 1Q24-LTW-03-013124
01/31/2024 320-109381-7
R-PSDA
0.77
UG/L
PQL
0.035
J
537 Modified
3535
Page 18 of 22

Site: Fayetteville
Sampling Program:
CAP GW Sampling 1Q24
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 Prep
CAP 1Q24-LTW-03-013124
01/31/2024 320-109381-7
Hydrolyzed PSDA
5.3 UG/L PQL
0.034 J 537 Modified 3535
CAP 1Q24-LTW-03-013124
01/31/2024 320-109381-7
R-EVE
0.32 UG/L PQL
0.039 J 537 Modified 3535
Page 19 of 22

Site: Fayetteville
Validation Reason Code
Sampling Program: CAP GW Sampling 1Q24 Validation Options: LABSTATS
The preparation hold time for this sample was exceeded by a factor of 2. The reported result may be biased low.
Date
Validation
Analytical
Field Sample ID
Sampled Lab Sample ID
Analyte
Result
Units
Type
MDL PQL
Qualifier
Method
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PF04DA
0.060
ug/L
PQL
0.0020
J
537 Modified
CAP1Q24-PW-11-013124
01/31/2024 320-109381-10
Perfluoropentanoic
0.23
UG/L
PQL
0.061
J
537 Modified
Acid
CAP1Q24-PW-11-013124
01/31/2024 320-109381-10
PS Acid
0.097
UG/L
PQL
0.050
J
537 Modified
CAP1Q24-PW-11-013124
01/31/2024 320-109381-10
Perfluoroheptanoic
0.11
UG/L
PQL
0.031
J
537 Modified
Acid
CAP1Q24-PW-10RR-
01/31/2024 320-109381-6
Perfluoropentanoic
0.52
UG/L
PQL
0.061
J
537 Modified
013124
Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Hydro -EVE Acid
0.0071
UG/L
PQL
0.0020
J
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Hydro -PS Acid
0.016
ug/L
PQL
0.0020
J
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PPF Acid
0.45
UG/L
PQL
0.0050
J
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PFMOAA
0.078
ug/L
PQL
0.0020
J
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PF02HxA
0.25
ug/L
PQL
0.0020
J
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluoroheptanoic
0.0025
UG/L
PQL
0.0020
J
537 Modified
Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluoropentanoic
0.0059
UG/L
PQL
0.0020
J
537 Modified
Acid
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Hfpo Dimer Acid
0.12
UG/L
PQL
0.0040
J
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
Perfluorobutanoic Acid
0.0094
UG/L
PQL
0.0050
J
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PEPA
0.053
UG/L
PQL
0.0020
J
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
R-EVE
0.029
UG/L
PQL
0.0020
J
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PFOA
0.0037
UG/L
PQL
0.0020
J
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
R-PSDA
0.092
UG/L
PQL
0.0020
J
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PMPA
0.26
UG/L
PQL
0.0020
J
537 Modified
CAP1Q24-OW30-013024
01/30/2024 320-109381-3
Perfluoropentanoic
0.46
UG/L
PQL
0.061
J
537 Modified
Acid
CAP1Q24-PIW-6S-013124
01/31/2024 320-109381-8
Perfluoropentanoic
0.76
UG/L
PQL
0.061
J
537 Modified
Acid
CAP1Q24-OW-57-020624
02/06/2024 320-109475-7
PS Acid
0.33
UG/L
PQL
0.050
J
537 Modified
CAP1Q24-OW-51-013124
01/31/2024 320-109381-9
Perfluoroheptanoic
0.20
UG/L
PQL
0.031
J
537 Modified
Acid
Pre -prep
Prep
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
Page 20 of 22

Site: Fayetteville
Validation Reason Code
Sampling Program: CAP GW Sampling 1Q24 Validation Options: LABSTATS
The preparation hold time for this sample was exceeded by a factor of 2. The reported result may be biased low.
Date
Validation
Analytical
Field Sample ID
Sampled Lab Sample ID
Analyte
Result
Units
Type
MDL PQL
Qualifier
Method
CAP1Q24-OW-51-013124
01/31/2024 320-109381-9
Perfluoropentanoic
1.4
UG/L
PQL
0.061
J
537 Modified
Acid
CAP1Q24-OW-33-013024
01/30/2024 320-109381-5
Perfluoropentanoic
0.12
UG/L
PQL
0.061
J
537 Modified
Acid
CAP1Q24-OW-40-013024
01/30/2024 320-109381-4
Perfluoropentanoic
0.075
UG/L
PQL
0.061
J
537 Modified
Acid
CAP 1Q24-LTW-03-013124
01/31/2024 320-109381-7
Perfluoropentanoic
0.56
UG/L
PQL
0.061
J
537 Modified
Acid
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
PPF Acid
0.19
UG/L
PQL
0.0050
J
537 Modified
011524
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
PFMOAA
0.028
ug/L
PQL
0.0020
J
537 Modified
011524
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
PEPA
0.11
UG/L
PQL
0.0020
J
537 Modified
011524
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Perfluoropentanoic
0.0032
UG/L
PQL
0.0020
J
537 Modified
011524
Acid
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
R-EVE
0.0047
UG/L
PQL
0.0020
J
537 Modified
011524
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
R-PSDA
0.012
UG/L
PQL
0.0020
J
537 Modified
011524
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
PMPA
0.32
UG/L
PQL
0.0020
J
537 Modified
011524
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
Hfpo Dimer Acid
0.16
UG/L
PQL
0.0040
J
537 Modified
011524
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
PF02HxA
0.11
ug/L
PQL
0.0020
J
537 Modified
011524
CAP1Q24-BLADEN-1DR-
01/15/2024 320-108762-10
PF030A
0.014
ug/L
PQL
0.0020
J
537 Modified
011524
Pre -prep
Prep
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
Page 21 of 22

Site: Fayetteville Sampling Program: CAP GW Sampling 1Q24 Validation Options
Validation Reason Code: The preparation hold time for this sample was exceeded. The reported result may be biased low.
Date
Validation
Analytical
Field Sample ID
Sampled Lab Sample ID
Analyte
Result
Units
Type
MDL PQL
Qualifier
Method
CAP1Q24-SMW-12-
01/16/2024 320-108762-4
PPF Acid
6.4
UG/L
PQL
0.31
J
537 Modified
011624
CAP1Q24-SMW-12-
01/16/2024 320-108762-4
PPF Acid
4.0
UG/L
PQL
0.31
J
537 Modified
011624
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PPF Acid
0.35
UG/L
PQL
0.31
J
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PPF Acid
0.56
UG/L
PQL
0.31
J
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PFMOAA
0.084
ug/L
PQL
0.051
J
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PF02HxA
0.23
ug/L
PQL
0.069
J
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
R-PSDA
0.046
UG/L
PQL
0.035
J
537 Modified
CAP1Q24-PW-07-020724
02/07/2024 320-109816-1
PMPA
0.23
UG/L
PQL
0.043
J
537 Modified
CAP1Q24-PW-06-011524
01/15/2024 320-108762-8
PPF Acid
0.95
UG/L
PQL
0.31
J
537 Modified
CAP1Q24-PW-06-011524
01/15/2024 320-108762-8
PPF Acid
0.59
UG/L
PQL
0.31
J
537 Modified
CAP1Q24-PW-06-011524
01/15/2024 320-108762-8
PFMOAA
0.13
ug/L
PQL
0.051
J
537 Modified
CAP1Q24-PIW-7S-011524
01/15/2024 320-108762-3
PPF Acid
17
UG/L
PQL
0.31
J
537 Modified
CAP1Q24-PIW-7S-011524
01/15/2024 320-108762-3
PPF Acid
11
UG/L
PQL
0.31
J
537 Modified
CAP1Q24-PIW-1S-011624
01/16/2024 320-108762-7
PPF Acid
1.3
UG/L
PQL
0.31
J
537 Modified
CAP1Q24-PIW-IS-011624
01/16/2024 320-108762-7
PPF Acid
0.79
UG/L
PQL
0.31
J
537 Modified
CAP1Q24-PIW-1S-011624
01/16/2024 320-108762-7
PFMOAA
0.39
ug/L
PQL
0.051
J
537 Modified
CAP 1Q24-LTW-04-011624
01/16/2024 320-108762-5
PPF Acid
43
UG/L
PQL
0.31
J
537 Modified
CAP 1Q24-LTW-04-011624
01/16/2024 320-108762-5
PPF Acid
28
UG/L
PQL
0.31
J
537 Modified
LABSTATS
Pre -prep
Prep
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
Page 22 of 22

ADQM Data Review
Site: Chemours Fayetteville
Project: CAP SW Sampling 1 Q24
Project Reviewer: Bridget Gavaghan

Sample Summary
Field Sample ID
Lab Sample ID
Sample
Filtered
Sample
Sample
Sample
Matrix
Date
Time
Purpose
Surface
CAP 1 Q24-WC-6-24-012524
320-109127-1
Water
N
01/25/2024
07:00
FS
RIVER-WATER-INTAKE2-24-012524
320-109127-2
Surface
N
01/25/2024
07:06
FS
Water
CAP 1 Q24-SEEP-A-EFF-24-012524
320-109127-3
Surface
N
01/25/2024
07:12
FS
Water
CAP 1 Q24-SE EP-C-E FF-24-012524
320-109127-4
Surface
N
01/25/2024
07:24
FS
Water
Surface
CAP 1 Q24-OUTFALL-002-24-012524
320-109127-5
Water
N
01/25/2024
07:24
FS
CAP1Q24-OLDOF-1B-24-012524
320-109127-6
Surface
N
01/25/2024
07:36
FS
Water
CAP1Q24-CFR-TARHEEL-24-012524
320-109127-7
Surface
N
01/25/2024
10:24
FS
Water
CAP1 Q24-EQBLK-PP-01 2524
320-109127-8
Blank
N
01/25/2024
13:50
EB
Water
CAP1Q24-EQBLK-IS-012524
320-109127-9
Blank
N
01/25/2024
13:35
EB
Water
CAP1Q24-GBC-5-012424
320-109128-1
Surface
N
01/24/2024
12:10
FS
Water
CAP1Q24-LOCK-DAM-SEEP-012424
320-109128-2
Surface
N
01/24/2024
12:15
FS
Water
CAP1Q24-LOCK-DAM-SEEP-012424-D
320-109128-3
Surface
N
01/24/2024
12:15
DUP
Water
CAP1Q24-CFR-RM-76-012424
320-109128-4
Surface
N
01/24/2024
09:15
FS
Water
CAP1 Q24-CFR-BLADEN-01 2424
320-109128-5
Surface
N
01/24/2024
13:50
FS
Water
CAP1Q24-CFR-TARHEEL-012424
320-109128-6
Surface
N
01/24/2024
14:10
FS
Water
CAP1 Q24-CFR-KINGS-01 2524
320-109128-7
Surface
N
01/25/2024
12:07
FS
Water
CAP1Q24-SEEP-B-EFF-24-012624
320-109219-1
Surface
N
01/26/2024
08:47
FS
Water
CAP1Q24-SEEP-D-EFF-24-012624
320-109219-2
Surface
N
01/26/2024
08:30
FS
Water
CAP 1 Q24-WC-1 -24-022224
320-109943-1
Surface
N
02/22/2024
09:06
FS
Water
CAP 1 Q24-WC-2-24-022224
320-109943-2
Surface
N
02/22/2024
08:50
FS
Water
CAP 1 Q24-WC-3-24-022224
320-109943-3
Surface
N
02/22/2024
08:27
FS
Water
CAP1Q24-WC-3-24-022224-D
320-109943-4
Surface
N
02/22/2024
08:27
DUP
Water
CAP1Q24-EQBLK-IS-022224
320-109943-5
Blank
N
02/22/2024
15:30
EB
Water
* FS=Field Sample
DUP=Field Duplicate
FB=Field Blank
EB=Equipment Blank
TB=Trip Blank

Analytical Protocol
Lab Name
Lab Method
Parameter Category
Sampling Program
Eurofins Environ Testing
537
Per- and Polyfluorinated Alkyl
CAP SW Sampling 1 Q24
Northern Cali
Modified
Substances (PFAS)

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
heads ace 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
X
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
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. Overall, 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.

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
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.).

DVM Narrative Report
Site: Fayetteville Sampling Program: CAP SW Sampling 1Q24 Validation Options: LABSTATS
Validation Reason Code: Only one surrogate has relative percent recovery (RPR) values outside control limits and the parameter is a PFC (Nondetects).
Date
Validation
Analytical
Field Sample ID Sampled Lab Sample ID
Analyte
Result Units Type MDL PQL Qualifier
Method Pre -prep Prep
CAP1Q24-CFR-TARHEEL- 01/24/2024 320-109128-6
Perfluorooctadecanoic
0.0020 ug/L PQL 0.0020 UJ
537 Modified 3535
012424
Acid
CAP1Q24-CFR-TARHEEL- 01/24/2024 320-109128-6
Perfluorohexadecanoic
0.0020 ug/L PQL 0.0020 UJ
537 Modified 3535
012424
Acid (PFHxDA)
Page 1 of 10

Site: Fayetteville
Validation Reason Code
Sampling Program: CAP SW Sampling 1 Q24 Validation Options: LABSTATS
The preparation hold time for this sample was exceeded by a factor of 2. The reported result may be biased low.
Date
Validation
Analytical
Field Sample ID
Sampled Lab Sample ID
Analyte
Result
Units
Type
MDL PQL
Qualifier
Method
CAP1Q24-EQBLK-IS-
02/22/2024 320-109943-5
Perfluorooctadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
022224
Acid
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
PFECA B
0.078
UG/L
PQL
0.078
UJ
537 Modified
SEEP-012424-D
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
Perfluorooctadecanoic
0.12
ug/L
PQL
0.12
UJ
537 Modified
SEEP-012424-D
Acid
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
2-(N-ethyl perfluoro-1-
0.11
ug/L
PQL
0.11
UJ
537 Modified
SEEP-012424-D
octanesulfonamido)-ethanol
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
PFOS
0.068
UG/L
PQL
0.068
UJ
537 Modified
SEEP-012424-D
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
Perfluoroundecanoic
0.14
UG/L
PQL
0.14
UJ
537 Modified
SEEP-012424-D
Acid
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
N-Methyl Perfluorooctane
0.15
UG/L
PQL
0.15
UJ
537 Modified
SEEP-012424-D
Sulfonamidoacetic Acid
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
Perfluoro(2-
0.036
UG/L
PQL
0.036
UJ
537 Modified
SEEP-012424-D
ethoxyethane)sulfonic
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
10:2 Fluorotelomer
0.084
ug/L
PQL
0.084
UJ
537 Modified
SEEP-012424-D
sulfonate
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
R-PSDCA
0.18
UG/L
PQL
0.18
UJ
537 Modified
SEEP-012424-D
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
2-(N-methyl perfluoro-l-
0.18
ug/L
PQL
0.18
UJ
537 Modified
SEEP-012424-D
octanesulfonamido)-ethanol
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
6:2 Fluorotelomer
0.31
ug/L
PQL
0.31
UJ
537 Modified
SEEP-012424-D
sulfonate
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
PS Acid
0.050
UG/L
PQL
0.050
UJ
537 Modified
SEEP-012424-D
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
N-Ethyl Perfluorooctane
0.16
UG/L
PQL
0.16
UJ
537 Modified
SEEP-012424-D
Sulfonamidoacetic Acid
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
Perfluorohexanoic
0.073
UG/L
PQL
0.073
UJ
537 Modified
SEEP-012424-D
Acid
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
Perfluorododecanoic
0.069
UG/L
PQL
0.069
UJ
537 Modified
SEEP-012424-D
Acid
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
N-methyl perfluoro-1-
0.054
ug/L
PQL
0.054
UJ
537 Modified
SEEP-012424-D
octanesulfonamide
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
PFOA
0.11
UG/L
PQL
0.11
UJ
537 Modified
SEEP-012424-D
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
Perfluorodecanoic
0.039
UG/L
PQL
0.039
UJ
537 Modified
SEEP-012424-D
Acid
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
Perfluorodecane
0.040
UG/L
PQL
0.040
UJ
537 Modified
SEEP-012424-D
Sulfonic Acid
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
Perfluorohexane
0.071
UG/L
PQL
0.071
UJ
537 Modified
SEEP-012424-D
Sulfonic Acid
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
Perfluorobutanoic Acid
0.30
UG/L
PQL
0.30
UJ
537 Modified
SEEP-012424-D
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
Perfluorobutane
0.025
UG/L
PQL
0.025
UJ
537 Modified
SEEP-012424-D
Sulfonic Acid
Pre -prep
Prep
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
Page 2 of 10

Site: Fayetteville
Validation Reason Code
Sampling Program: CAP SW Sampling 1 Q24 Validation Options: LABSTATS
The preparation hold time for this sample was exceeded by a factor of 2. The reported result may be biased low.
Date
Field Sample ID
Sampled Lab Sample ID
Analyte
Result
Units
Type
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
Perfluoroheptane
0.024
ug/L
PQL
SEEP-012424-D
Sulfonic Acid (PFHpS)
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
Perfluorononanoic
0.034
UG/L
PQL
SEEP-012424-D
Acid
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
Perfluorotetradecanoic
0.091
UG/L
PQL
SEEP-012424-D
Acid
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
1H,1H,2H,2H-
0.058
ug/L
PQL
SEEP-012424-D
perfluorodecanesulfonate (8:2
FTS)
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
Perfluoropentane
0.038
ug/L
PQL
SEEP-012424-D
Sulfonic Acid (PFPeS)
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
N-ethylperfluoro-1-
0.11
UG/L
PQL
SEEP-012424-D
octanesulfonamide
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
Perfluorohexadecanoic
0.11
ug/L
PQL
SEEP-012424-D
Acid (PFHxDA)
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
Perfluorononanesulfon
0.046
ug/L
PQL
SEEP-012424-D
is Acid
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
EVE Acid
0.050
UG/L
PQL
SEEP-012424-D
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
Perfluorotridecanoic
0.16
UG/L
PQL
SEEP-012424-D
Acid
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
PFECA-G
0.036
UG/L
PQL
SEEP-012424-D
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
DONA
0.050
ug/L
PQL
SEEP-012424-D
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
Perfluorooctane
0.12
UG/L
PQL
SEEP-012424-D
Sulfonamide
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
9CI-PF30NS
0.030
ug/L
PQL
SEEP-012424-D
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
1H,1H,2H,2H-
0.030
ug/L
PQL
SEEP-012424-D
perfluorohexanesulfonate (4:2
FTS)
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
11CI-PF3OUdS
0.040
ug/L
PQL
SEEP-012424-D
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
Perfluorododecane
0.12
ug/L
PQL
SEEP-012424-D
Sulfonic Acid (PFDoS)
Validation
Analytical
MDL PQL
Qualifier
Method
0.024
UJ
537 Modified
0.034
UJ
537 Modified
0.091
UJ
537 Modified
0.058
UJ
537 Modified
0.038
UJ
537 Modified
0.11
UJ
537 Modified
0.11
UJ
537 Modified
0.046
UJ
537 Modified
0.050
UJ
537 Modified
0.16
UJ
537 Modified
0.036
UJ
537 Modified
0.050
UJ
537 Modified
0.12
UJ
537 Modified
0.030
UJ
537 Modified
0.030
UJ
537 Modified
0.040
UJ
537 Modified
0.12
UJ
537 Modified
Pre -prep
Prep
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
Page 3 of 10

Site: Fayetteville
Sampling Program:
CAP SW Sampling 1Q24
Validation Options: LABSTATS
Validation Reason Code: Associated LCS and/or LCSD analysis had relative
percent recovery (RPR) values less than the lower control limit
but above 10%. The actual detection limits may be higher
than reported.
Date
Validation
Analytical
Field Sample ID
Sampled Lab Sample ID
Analyte
Result
Units
Type MDL
PQL
Qualifier
Method Pre -prep
Prep
CAP1Q24-CFR-BLADEN-
01/24/2024 320-109128-5
Perfluorobutanoic Acid
0.0050
UG/L
PQL
0.0050
UJ
537 Modified
3535
012424
CAP1Q24-CFR-KINGS-
01/25/2024 320-109128-7
Perfluorobutanoic Acid
0.0050
UG/L
PQL
0.0050
UJ
537 Modified
3535
012524
CAP1Q24-CFR-RM-76-
01/24/2024 320-109128-4
Perfluorobutanoic Acid
0.0050
UG/L
PQL
0.0050
UJ
537 Modified
3535
012424
CAP1Q24-CFR-TARHEEL-
01/24/2024 320-109128-6
Perfluorobutanoic Acid
0.0050
UG/L
PQL
0.0050
UJ
537 Modified
3535
012424
CAP1Q24-CFR-TARHEEL-
01/25/2024 320-109127-7
Perfluorooctadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
3535
24-012524
Acid
CAP1Q24-EQBLK-IS-
01/25/2024 320-109127-9
Perfluorooctadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
3535
012524
Acid
CAP1Q24-EQBLK-PP-
01/25/2024 320-109127-8
Perfluorooctadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
3535
012524
Acid
CAP1Q24-GBC-5-012424
01/24/2024 320-109128-1
Perfluorobutanoic Acid
0.0050
UG/L
PQL
0.0050
UJ
537 Modified
3535
CAP1Q24-0LD0E-1B-24-
01/25/2024 320-109127-6
Perfluorooctadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
3535
012524
Acid
CAP1Q24-SEEP-B-EFF-
01/26/2024 320-109219-1
PS Acid
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
3535
24-012624
CAP1Q24-SEEP-C-EFF-
01/25/2024 320-109127-4
Perfluorooctadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
3535
24-012524
Acid
CAP1Q24-SEEP-D-EFF-
01/26/2024 320-109219-2
PS Acid
0.0020
UG/L
PQL
0.0020
UJ
537 Modified
3535
24-012624
CAP1Q24-OUTFALL-002-
01/25/2024 320-109127-5
Perfluorooctadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
3535
24-012524
Acid
CAP1Q24-SEEP-A-EFF-
01/25/2024 320-109127-3
Perfluorooctadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
3535
24-012524
Acid
CAP1Q24-WC-6-24-
01/25/2024 320-109127-1
Perfluorooctadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
3535
012524
Acid
RIVER-WATER-INTAKE2-
01/25/2024 320-109127-2
Perfluorooctadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
3535
24-012524
Acid
Page 4 of 10

Site: Fayetteville Sampling Program: CAP SW Sampling 1Q24 Validation Options
Validation Reason Code: The preparation hold time for this sample was exceeded. The reporting limit may be biased low.
Date
Validation
Analytical
Field Sample ID
Sampled Lab Sample ID
Analyte
Result
Units
Type
MDL PQL
Qualifier
Method
CAP1Q24-CFR-TARHEEL-
01/25/2024 320-109127-7
Perfluorooctadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
24-012524
Acid
CAP1Q24-EQBLK-IS-
01/25/2024 320-109127-9
Perfluorooctadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
012524
Acid
CAP1Q24-EQBLK-PP-
01/25/2024 320-109127-8
Perfluorooctadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
012524
Acid
CAP1Q24-SEEP-C-EFF-
01/25/2024 320-109127-4
Perfluorooctadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
24-012524
Acid
CAP1Q24-OUTFALL-002-
01/25/2024 320-109127-5
Perfluorooctadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
24-012524
Acid
CAP1Q24-SEEP-A-EFF-
01/25/2024 320-109127-3
Perfluorooctadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
24-012524
Acid
CAP1Q24-WC-6-24-
01/25/2024 320-109127-1
Perfluorooctadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
012524
Acid
RIVER-WATER-INTAKE2-
01/25/2024 320-109127-2
Perfluorooctadecanoic
0.0020
ug/L
PQL
0.0020
UJ
537 Modified
24-012524
Acid
LABSTATS
Pre -prep
Prep
3535
3535
3535
3535
3535
3535
3535
3535
Page 5 of 10

Site: Fayetteville
Validation Reason Code
Sampling Program: CAP SW Sampling 1Q24 Validation Options: LABSTATS
High relative percent difference (RPD) observed between field duplicate and parent sample. The reported result may be imprecise.
Date
Validation
Analytical
Field Sample ID
Sampled Lab Sample ID
Analyte
Result
Units
Type
MDL PQL
Qualifier
Method
CAP1Q24-WC-3-24-
02/22/2024 320-109943-3
PMPA
0.083
UG/L
PQL
0.0034
J
537 Modified
022224
CAP1Q24-WC-3-24-
02/22/2024 320-109943-3
Hfpo Dimer Acid
0.050
UG/L
PQL
0.015
J
537 Modified
022224
CAP1Q24-WC-3-24-
02/22/2024 320-109943-3
R-PSDA
0.0033
UG/L
PQL
0.0028
J
537 Modified
022224
CAP1Q24-WC-3-24-
02/22/2024 320-109943-3
Perfluorobutane
0.0043
UG/L
PQL
0.0020
J
537 Modified
022224
Sulfonic Acid
CAP1Q24-WC-3-24-
02/22/2024 320-109943-3
PF02HxA
0.044
ug/L
PQL
0.0055
J
537 Modified
022224
CAP1Q24-WC-3-24-
02/22/2024 320-109943-3
PFMOAA
0.022
ug/L
PQL
0.0041
J
537 Modified
022224
CAP1Q24-WC-3-24-
02/22/2024 320-109943-4
PMPA
0.14
UG/L
PQL
0.0020
J
537 Modified
022224-D
CAP1Q24-WC-3-24-
02/22/2024 320-109943-4
Hfpo Dimer Acid
0.094
UG/L
PQL
0.0040
J
537 Modified
022224-D
CAP1Q24-WC-3-24-
02/22/2024 320-109943-4
R-PSDA
0.0092
UG/L
PQL
0.0020
J
537 Modified
022224-D
CAP1Q24-WC-3-24-
02/22/2024 320-109943-4
Perfluorobutane
0.0064
UG/L
PQL
0.0020
J
537 Modified
022224-D
Sulfonic Acid
CAP1Q24-WC-3-24-
02/22/2024 320-109943-4
PF02HxA
0.086
ug/L
PQL
0.0020
J
537 Modified
022224-D
CAP1Q24-WC-3-24-
02/22/2024 320-109943-4
PFMOAA
0.038
ug/L
PQL
0.0020
J
537 Modified
022224-D
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
6:2 Fluorotelomer
1.7
ug/L
PQL
0.31
J
537 Modified
SEEP-012424-D
sulfonate
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
PF04DA
2.8
ug/L
PQL
0.050
J
537 Modified
SEEP-012424-D
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-2
PF04DA
1.5
ug/L
PQL
0.050
J
537 Modified
SEEP-012424
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-2
PF04DA
1.5
ug/L
PQL
0.050
J
537 Modified
SEEP-012424
Pre -prep
Prep
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
Page 6 of 10

Site: Fayetteville
Sampling Program:
CAP SW Sampling 1 Q24
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 Prep
RIVER-WATER-INTAKE2-
01/25/2024 320-109127-2
R-PSDA
0.0030
UG/L
PQL
0.0020
J
537 Modified
3535
24-012524
RIVER-WATER-INTAKE2-
01/25/2024 320-109127-2
Hydrolyzed PSDA
0.0029
UG/L
PQL
0.0020
J
537 Modified
3535
24-012524
CAP1Q24-WC-6-24-
01/25/2024 320-109127-1
R-PSDA
0.030
UG/L
PQL
0.0020
J
537 Modified
3535
012524
CAP1Q24-WC-6-24-
01/25/2024 320-109127-1
Hydrolyzed PSDA
0.10
UG/L
PQL
0.0020
J
537 Modified
3535
012524
CAP1Q24-WC-6-24-
01/25/2024 320-109127-1
R-EVE
0.015
UG/L
PQL
0.0020
J
537 Modified
3535
012524
CAP1Q24-SEEP-B-EFF-
01/26/2024 320-109219-1
Hydrolyzed PSDA
0.0022
UG/L
PQL
0.0020
J
537 Modified
3535
24-012624
CAP1Q24-OUTFALL-002-
01/25/2024 320-109127-5
R-PSDA
0.018
UG/L
PQL
0.0020
J
537 Modified
3535
24-012524
CAP1Q24-OUTFALL-002-
01/25/2024 320-109127-5
Hydrolyzed PSDA
0.027
UG/L
PQL
0.0020
J
537 Modified
3535
24-012524
CAP1Q24-OUTFALL-002-
01/25/2024 320-109127-5
R-EVE
0.0036
UG/L
PQL
0.0020
J
537 Modified
3535
24-012524
CAP1Q24-WC-1-24-
02/22/2024 320-109943-1
R-PSDA
0.036
UG/L
PQL
0.0020
J
537 Modified
3535
022224
CAP1Q24-WC-1-24-
02/22/2024 320-109943-1
Hydrolyzed PSDA
0.16
UG/L
PQL
0.0020
J
537 Modified
3535
022224
CAP1Q24-WC-1-24-
02/22/2024 320-109943-1
R-EVE
0.018
UG/L
PQL
0.0020
J
537 Modified
3535
022224
CAP1Q24-WC-2-24-
02/22/2024 320-109943-2
R-PSDA
0.012
UG/L
PQL
0.0020
J
537 Modified
3535
022224
CAP1Q24-WC-2-24-
02/22/2024 320-109943-2
Hydrolyzed PSDA
0.014
UG/L
PQL
0.0020
J
537 Modified
3535
022224
CAP1Q24-WC-2-24-
02/22/2024 320-109943-2
R-EVE
0.0077
UG/L
PQL
0.0020
J
537 Modified
3535
022224
CAP1Q24-WC-3-24-
02/22/2024 320-109943-4
R-EVE
0.0046
UG/L
PQL
0.0020
J
537 Modified
3535
022224-D
CAP1Q24-0LD0E-1B-24-
01/25/2024 320-109127-6
R-PSDA
0.019
UG/L
PQL
0.0020
J
537 Modified
3535
012524
CAP1Q24-0LD0E-1B-24-
01/25/2024 320-109127-6
Hydrolyzed PSDA
0.036
UG/L
PQL
0.0020
J
537 Modified
3535
012524
CAP1Q24-0LD0E-1B-24-
01/25/2024 320-109127-6
R-EVE
0.013
UG/L
PQL
0.0020
J
537 Modified
3535
012524
CAP1Q24-L0CK-DAM-
01/24/2024 320-109128-3
R-EVE
0.18
UG/L
PQL
0.039
J
537 Modified
3535
SEEP-012424-D
CAP1Q24-L0CK-DAM-
01/24/2024 320-109128-3
R-PSDA
0.61
UG/L
PQL
0.035
J
537 Modified
3535
SEEP-012424-D
CAP1Q24-L0CK-DAM-
01/24/2024 320-109128-3
Hydrolyzed PSDA
0.42
UG/L
PQL
0.034
J
537 Modified
3535
SEEP-012424-D
CAP1Q24-L0CK-DAM-
01/24/2024 320-109128-2
R-PSDA
0.69
UG/L
PQL
0.035
J
537 Modified
3535
SEEP-012424
Page 7 of 10

Site: Fayetteville
Sampling Program:
CAP SW Sampling 1 Q24
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
Prep
CAP1Q24-L0CK-DAM-
01/24/2024 320-109128-2
R-PSDA
0.69 UG/L
PQL
0.035
J
537 Modified
3535
SEEP-012424
CAP1Q24-L0CK-DAM-
01/24/2024 320-109128-2
Hydrolyzed PSDA
0.43 UG/L
PQL
0.034
J
537 Modified
3535
SEEP-012424
CAP1Q24-L0CK-DAM-
01/24/2024 320-109128-2
Hydrolyzed PSDA
0.43 UG/L
PQL
0.034
J
537 Modified
3535
SEEP-012424
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-2
R-EVE
0.18 UG/L
PQL
0.039
J
537 Modified
3535
SEEP-012424
CAP1Q24-L0CK-DAM-
01/24/2024 320-109128-2
R-EVE
0.18 UG/L
PQL
0.039
J
537 Modified
3535
SEEP-012424
CAP1Q24-GBC-5-012424
01/24/2024 320-109128-1
R-PSDA
0.070 UG/L
PQL
0.0020
J
537 Modified
3535
CAP1Q24-GBC-5-012424
01/24/2024 320-109128-1
R-EVE
0.021 UG/L
PQL
0.0020
J
537 Modified
3535
Page 8 of 10

Site: Fayetteville
Validation Reason Code
Sampling Program: CAP SW Sampling 1 Q24 Validation Options: LABSTATS
The preparation hold time for this sample was exceeded by a factor of 2. The reported result may be biased low.
Date
Validation
Analytical
Field Sample ID
Sampled Lab Sample ID
Analyte
Result
Units
Type
MDL PQL
Qualifier
Method
CAP1Q24-L0CK-DAM-
01/24/2024 320-109128-3
NVHOS, Acid Form
0.94
UG/L
PQL
0.16
J
537 Modified
SEEP-012424-D
CAP1Q24-L0CK-DAM-
01/24/2024 320-109128-3
Hydro -EVE Acid
0.17
UG/L
PQL
0.030
J
537 Modified
SEEP-012424-D
CAP1Q24-L0CK-DAM-
01/24/2024 320-109128-3
Hydro -PS Acid
0.16
ug/L
PQL
0.055
J
537 Modified
SEEP-012424-D
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
PPF Acid
18
UG/L
PQL
0.31
J
537 Modified
SEEP-012424-D
CAP1Q24-L0CK-DAM-
01/24/2024 320-109128-3
PFMOAA
48
ug/L
PQL
0.051
J
537 Modified
SEEP-012424-D
CAP1Q24-L0CK-DAM-
01/24/2024 320-109128-3
PF02HxA
23
ug/L
PQL
0.069
J
537 Modified
SEEP-012424-D
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
PF030A
13
ug/L
PQL
0.11
J
537 Modified
SEEP-012424-D
CAP1Q24-L0CK-DAM-
01/24/2024 320-109128-3
PF05DA
0.20
ug/L
PQL
0.13
J
537 Modified
SEEP-012424-D
CAP1Q24-L0CK-DAM-
01/24/2024 320-109128-3
Perfluoroheptanoic
0.075
UG/L
PQL
0.031
J
537 Modified
SEEP-012424-D
Acid
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
PEPA
2.0
UG/L
PQL
0.060
J
537 Modified
SEEP-012424-D
CAP1Q24-L0CK-DAM-
01/24/2024 320-109128-3
Perfluoropentanoic
0.43
UG/L
PQL
0.061
J
537 Modified
SEEP-012424-D
Acid
CAP1Q24-L0CK-DAM-
01/24/2024 320-109128-3
R-EVE
0.21
UG/L
PQL
0.039
J
537 Modified
SEEP-012424-D
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
PMPA
5.6
UG/L
PQL
0.043
J
537 Modified
SEEP-012424-D
CAP1Q24-L0CK-DAM-
01/24/2024 320-109128-3
Hfpo Dimer Acid
7.3
UG/L
PQL
0.19
J
537 Modified
SEEP-012424-D
CAP1Q24-L0CK-DAM-
01/24/2024 320-109128-3
R-PSDA
0.53
UG/L
PQL
0.035
J
537 Modified
SEEP-012424-D
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-3
Hydrolyzed PSDA
0.48
UG/L
PQL
0.034
J
537 Modified
SEEP-012424-D
Pre -prep
Prep
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
3535
Page 9 of 10

Site: Fayetteville
Sampling Program:
CAP SW Sampling 1Q24
Validation Options: LABSTATS
Validation Reason Code: Associated MS and/or MSD analysis had relative percent recovery (RPR) values less than the lower
control limit but above the rejection limit. The reported
result may be
biased low.
Date
Validation Analytical
Field Sample ID
Sampled Lab Sample ID
Analyte
Result Units Type MDL
PQL
Qualifier Method Pre -prep
Prep
CAP1Q24-0LD0E-1B-24-
01/25/2024 320-109127-6
PF030A
0.11 ug/L PQL
0.0020
J 537 Modified
3535
012524
CAP1Q24-0LD0E-1B-24-
01/25/2024 320-109127-6
PF04DA
0.041 ug/L PQL
0.0020
J 537 Modified
3535
012524
CAP1Q24-L0CK-DAM-
01/24/2024 320-109128-2
PF030A
11 ug/L PQL
0.11
J 537 Modified
3535
SEEP-012424
CAP1Q24-LOCK-DAM-
01/24/2024 320-109128-2
PF030A
11 ug/L PQL
0.11
J 537 Modified
3535
SEEP-012424
Page 10 of 10

GeosMte&
consultants
Geosyntec Consultants of NC, P.C.
NC License No.: C-3500 and C-295
Appendix E
Correction of PFPrA Concentration
TR 1156 - Cape Fear River PFAS Mass Loading Assessment— First Quarter 2024 Report 23 June 2024

TABLE El Geosyntec Consultants NC, P.C.
REVISED AND ORIGINAL PFPRA CONCENTRATIONS
TARHEEL SAMPLING AND MASS LOADING MODEL
Chemours Fayetteville Works, North Carolina
Location
Sample ID
Sample Date
Sample Delivery
Group
Laboratory
Sample ID
PFPrA Concentration (ng/L)
Factor
(revised
concentration /
original
concentration)
Revised
Concentration
Original
Concentration
BLADEN-IDR
CAP3Q23-BLADEN-IDR-071223
7/12/2023
320-102527-1
320-102527-9
240
160
1.50
BLADEN-IDR
CAP4Q23-BLADEN-IDR-010424
1/4/2024
320-108551-1
320-108551-1
200
130
1.54
CFR-BLADEN
CAP3Q23-CFR-BLADEN-072623
7/26/2023
320-103017-1
1 320-103017-5
44
26
1.69
CFR-BLADEN
CAP4Q23-CFR-BLADEN-120623
12/6/2023
320-107896-1
320-107896-1
49
31
1.58
CFR-KINGS
CAP3Q23-CFR-KINGS-080123
8/1/2023
320-103199-1
320-103199-2
32
21
1.52
CFR-KINGS
CAP4Q23-CFR-KINGS-121423
12/14/2023
320-108081-1
320-108081-1
44 J
28 J
1.57
CFR-MILE-76
CAP3Q23-CFR-RM-76-072623
7/26/2023
320-103017-1
320-103017-1
27
17
1.59
CFR-MILE-76
CAP4Q23-CFR-RM-76-112223
11/22/2023
320-107648-1
320-107648-1
20
11
1.82
CFR-TARHEEL
CAP3Q23-CFR-TARHEEL-072723
7/27/2023
320-103017-1
320-103017-6
44
26
1.69
CFR-TARHEEL
CAP3Q23-CFR-TARHEEL-6-072723
7/27/2023
320-103199-1
320-103199-1
32
20
1.60
CFR-TARHEEL
CAP4Q23-CFR-TARHEEL-120623
12/6/2023
320-107896-1
320-107896-2
50
32
1.56
CFR-TARHEEL
CAP4Q23-TARHEEL-24-112423
11/24/2023
320-107480-1
320-107480-8
37
25
1.48
CFR-TARHEEL
CFR-TARHEEL-121823
12/18/2023
320-108237-1
320-108237-2
37 J
24 J
1.54
CFR-TARHEEL
CFR-TARREEL-121923
12/19/2023
320-108237-1
320-108237-3
<5
<5
CFR-TARHEEL
CFR-TARHEEL-24-100523
10/5/2023
320-105969-1
320-105969-1
40
26
1.54
CFR-TARHEEL
CFR-TARHEEL-24-101023
10/10/2023
320-105969-1
320-105969-2
40
26
1.54
CFR-TARHEEL
CFR-TARHEEL-24-101023-D
10/10/2023
320-105969-1
320-105969-3
40
27
1.48
CFR-TARHEEL
CFR-TARHEEL-24-101223
10/12/2023
320-106157-1
320-106157-1
1 38
25
1.52
CFR-TARHEEL
CFR-TARHEEL-24-101623
10/16/2023
320-106157-1
320-106157-2
55
36
1.53
CFR-TARHEEL
CFR-TAREEEL-24-101923
10/19/2023
320-106379-1
320-106379-1
42
26
1.62
CFR-TARHEEL
CFR-TARHEEL-24-102323
10/23/2023
320-106379-1
320-106379-2
41
26
1.58
CFR-TARHEEL
CFR-TARHEEL-24-102623
10/26/2023
320-106734-1
320-106734-1
26
17
1.53
CFR-TARHEEL
CFR-TARBEEL-24-103023
10/30/2023
320-106734-1
320-106734-2
29 J
19 J
1.53
CFR-TARHEEL
CFR-TAREEEL-24-110223
11/2/2023
320-106957-1
320-106957-1
55
34
1.62
CFR-TARHEEL
CFR-TARHEEL-24-110623
11/6/2023
320-106957-1
320-106957-2
1 35
23
1.52
CFR-TARHEEL
CFR-TARHEEL-24-110923
11/9/2023
320-107164-1
320-107164-1
37
24
1.54
CFR-TARHEEL
CFR-TARHEEL-24-111323
11/13/2023
320-107164-1
320-107164-2
40
27
1.48
CFR-TARHEEL
CFR-TARHEEL-24-111323-D
11/13/2023
320-107164-1
320-107164-3
41
27
1.52
CFR-TARHEEL
CFR-TARHEEL-24-111623
11/16/2023
320-107540-1
320-107540-1
45
30
1.50
CFR-TARHEEL
CFR-TARHEEL-24-112023
11/20/2023
320-107540-1
320-107540-2
65
44
1.48
CFR-TARHEEL
CFR-TARHEEL-24-112123
11/21/2023
320-107540-1
320-107540-3
47
31
1.52
CFR-TARHEEL
CFR-TARHEEL-24-112223
11/22/2023
320-107540-1
1 320-1075404
41
27
1.52
CFR-TARHEEL
CFR-TARHEEL-24-112723
11/27/2023
320-107657-1
320-107657-1
523
33 J
1.58
CFR-TARHEEL
CFR-TARHEEL-24-113023
11/30/2023
320-107657-1
320-107657-2
50 J
32 J
1.56
CFR-TARHEEL
CFR-TARHEEL-24-120423
12/4/2023
320-107894-1
320-107894-1
50
31
1.61
CFR-TARHEEL
CFR-TARHEEL-24-120723
12/7/2023
320-107894-1
320-107894-2
46
29
1.59
CFR-TARHEEL
CFR-TARHEEL-24-121123
12/11/2023
320-108044-1
320-108044-1
41
26
1.58
CFR-TARHEEL
CFR-TARHEEL-24-121223
12/12/2023
320-108044-1
320-108044-2
38
24
1.58
CFR-TARHEEL
CFR-TARHEEL-24-121223-D
12/12/2023
320-108044-1
1 320-108044-3
47
30
1.57
CFR-TARHEEL
CFR-TARHEEL-24-121723
12/17/2023
320-108237-1
320-108237-1
24 J
15 J
1.60
CFR-TARHEEL
CFR-TARHEEL-24-122523
12/25/2023
320-108425-1
320-108425-1
15
9.8
1.53
CFR-TARHEEL
CFR-TARHEEL-24-122723
12/27/2023
320-108425-1
320-108425-2
17
11
1.55
EB
CAP3Q23-EQBLK-BAILER-102423
10/24/2023
320-106378-1
320-106378-1
15
<5
--
EB
CAP3Q23-EQBLK-BAILER-102423-Z
10/24/2023
320-106378-1
320-106378-2
<5
<5
--
EB
CAP3Q23-EQBLK-BP-071123
7/11/2023
320-102509-1
320-102509-10
<5
<5
--
EB
CAP3Q23-EQBLK-DV-071223
7/12/2023
320-102509-1
320-102509-11
<5
<5
-
EB
CAP3Q23-EQBLK-DV-081623
8/16/2023
320-104043-1
1 320-104043-6
<5
<5
--
EB
CAP3Q23-EQBLK-FILTER-071423
7/14/2023
320-102718-1
320-102718-11
<5
<5
--
EB
CAP3Q23-EQBLK-PP-071223
7/12/2023
320-102527-1
320-102527-10
<5
<5
-
EB
CAP3Q23-EQBLK-PP-071723
7/17/2023
320-102718-1
320-102718-10
15
15
--
EB
CAP3Q23-EQBLK-PP-080423
8/4/2023
320-104043-1
320-1040434
<5 UJ
<5 UJ
--
EB
CAP3Q23-EQBLK-PP-081823
8/18/2023
320-104043-1
320-104043-5
<5
<5
--
EB
CAP3Q23-EQBLK-PP-102423
10/24/2023
320-106378-1
320-106378-3
1 <5
<5
-
EB
CAP3Q23-EQBLK-PP-102423-Z
10/24/2023
320-106378-1
320-106378-4
15
<5
-
EB
CAP4Q23-EQBLK-DV-110823
11/8/2023
320-106887-1
320-106887-6
<5
<5
--
EB
CAP4Q23-EQBLK-DV-110823-Z
11/8/2023
320-106887-1
320-106887-5
<5
<5
--
EB
CAP4Q23-EQBLK-PP-010424
1/4/2024
320-108551-1
320-108551-2
<5
<5
--
EB
CAP4Q23-EQBLK-PP-110823
11/8/2023
320-106887-1
320-106887-9
<5
<5
-
EB
CAP4Q23-EQBLK-PP-110823-Z
11/8/2023
320-106887-1
320-106887-8
<5
<5
--
EB
CAP4Q23-EQBLK-BAILER-110923
11/9/2023
320-107233-1
320-107233-6
<5
<5
--
EB
CAP4Q23-EQBLK-BAILER-110923-Z
11/9/2023
320-107233-1
320-107233-7
<5
<5
-
EB
CAP3Q23-EQBLK-IS-072723
7/27/2023
320-103017-1
320-103017-7
15
<5
--
EB
CAP3Q23-EQBLK-PP-072723
7/27/2023
320-103017-1
320-103017-8
<5
<5
--
GBG1
CAP3Q23-GBC-1-072623
7/26/2023
320-103017-1
320-103017-2
540
330
1.64
GBC-1
CAP4Q23-GBC-1-112223
11/22/2023
320-107648-1
320-107648-2
680
410
1.66
Lock -Dam North
CAP3Q23-LOCK-DAM-NORTH-072623
1 7/26/2023
320-103017-1
320-103017-4
1 5,500
3,300
1.67
Lock -Dam North
CAP4Q23-LOCK-DAM-NORTH-112223
11/22/2023
1 320-107648-1
320-107648-5
4,800
3,000
1.60
Lock -Dam Seep
CAP3Q23-LOCK-DAM-SEEP-072623
7/26/2023
320-103017-1
320-103017-3
22,000
13,000
1.69
Lock -Dam Seep
CAP4Q23-LOCK-DAM-SEEP-112223
11/22/2023
320-107648-1
320-107648-3
9,000 J
5,600 J
I.61
Lock -Dam Seep
CAP4Q23-LOCK-DAM-SEEP-112223-D
11/22/2023
320-107648-1
320-1076484
8,600 J
10,000 J
0.86
TRI 156 Page 1 of 2 June 2024

TABLE El Geosyntec Consultants NC, P.C.
REVISED AND ORIGINAL PFPRA CONCENTRATIONS
TARHEEL SAMPLING AND MASS LOADING MODEL
Chemours Fayetteville Works, North Carolina
Location
Sample ID
Sample Date
Sample Delivery
Group
Laboratory
Sample ID
PFPrA Concentration (ng/L)
Factor
(revised
concentration /
original
concentration)
Revised
Concentration
Original
Concentration
LTW-01
CAP3Q23-LTW-01-071323
7/13/2023
320-102712-1
320-102712-2
22,000
14,000
1.57
LTW-01
CAP4Q23-LTW-01-110323
11/3/2023
320-106773-1
320-106773-1
24,000
14,000
1.71
LTW-02
CAP3Q23-LTW-02-071223
7/12/2023
320-102527-1
320-102527-8
16,000
11,000
1 1.45
LTW-02
CAP4Q23-LTW-02-110323
11/3/2023
320-106772-1
320-106772-7
21,000
13,000
1.62
LTW-03
CAP3Q23-LTW-03-071223
7/12/2023
320-102527-1
320-102527-5
62,0001
37,000
1.68
LTW-03
CAP4Q23-LTW-03-111323
11/13/2023
320-107233-1
320-107233-3
61,0001
38,0001
1.61
LTW-04
CAP3Q23-LTW-04-071123
7/11/2023
320-102527-1
320-102527-1
53,000
29,000
1.83
LTW-04
CAP4Q23-LTW-04-110223
11/2/2023
320-106772-1
320-106772-5
48,000
30,000
1.60
LTW-05
CAP3Q23-LTW-05-071123
7/11/2023
320-102509-1
320-102509-6
1 83,0001
52,0001
1.60
LTW-05
CAP4Q23-LTW-05-110223
11/2/2023
320-106772-1
320-106772-1
120,000
68,000
1.76
OLDOF-1
CAP3Q23-OLDOF-1-24-072723
7/27/2023
320-103013-1
320-103013-6
1,400
920
1.52
OLDOF-1
CAP4Q23-OLDOF-1-24-112323
11/23/2023
320-107480-1
320-107480-9
1,600
1,000
1.60
OUTFALL 002
CAP3Q23-OUTFALL-002-24-072723
7/27/2023
320-103016-1
320-103016-4
730
460
1.59
OUTFALL 002
OUTFALL-002-24-072723-D
7/27/2023
320-103016-1
320-103016-5
730
480
1.52
OUTFALL 002
CAP4Q23-OUTFALL-002-112323
11/23/2023
320-107480-1
320-107480-6
230
150
1.53
OW-28
CAP3Q23-OW-28-071123
7/11/2023
320-102509-1
320-102509-5
5,200
3,500
1.49
OW-28
CAP4Q23-OW-28-110223
11/2/2023
320-106772-1
320-106772-6
5,500
3,500
1.57
OW-33
CAP3Q23-OW-33-071223
7/12/2023
320-102527-1
320-102527-3
9,900
5,400
1.83
OW-33
CAP4Q23-OW-33-110223
11/2/2023
320-106773-1
320-106773-3
9,400
6,000
1.57
OW-33
CAP4Q23-OW-33-110223-D
11/2/2023
320-106773-1
320-106773-4
9,000
5,900
1.53
PIW-11)
CAP3Q23-PIW-ID-080223
8/2/2023
320-103526-1
320-103526-4
12,0001
7,800
1.54
PIW-113
CAP4Q23-PIW-ID-110723
11/7/2023
320-106887-1
320-106887-1
12,000
1 7,500
1.60
PIW-11)
CAP4Q23-PIW-1D-I10723-Z
11/7/2023
320-106887-1
320-106887-2
12,000
7,700
1.56
PIW-3D
CAP3Q23-PIW-3D-071323
7/13/2023
320-102712-1
320-102712-1
19,000
11,000
1.73
PIW-31)
CAP4Q23-PIW-3D-110323
11/3/2023
320-106773-1
320-106773-2
21,000
13,000
1.62
PIW-7D
CAP3Q23-PIW-7D-071123
7/11/2023
320-102509-1
320-102509-3
79,000 J
49,000 J
1.61
PIW-71)
CAP4Q23-PIW-7D-110223
11/2/2023
320-106772-1
320-106772-3
86,000
52,000
1.65
PIW-7S
CAP3Q23-PIW-7S-071123
7/11/2023
320-102509-1
320-102509-2
14,000
9,700
1.44
PIW-7S
CAP4Q23-PIW-7S-110223
11/2/2023
320-106772-1
320-106772-2
18,000
12,000
1.50
PW-04
CAP3Q23-PW-04-072823
7/28/2023
320-103202-1
320-103202-5
1,400
900
1.56
PW-04
CAP3Q23-PW-04-072823-Z
7/28/2023
320-103202-1
320-103202-6
1,600
890
1.80
PW-04
CAP4Q23-PW-04-110923
11/9/2023
320-107233-1
320-107233-1
1,500
960
1.56
PW-04
CAP4Q23-PW-04-110923-Z
11/9/2023
320-107233-1
320-107233-2
1,500
980
1.53
PW-06
CAP3Q23-PW-06-071023
7/10/2023
320-102399-1
320-102399-11
920
620
1.48
PW-06
CAP4Q23-PW-06-110623
11/6/2023
320-106773-1
320-106773-5
840
520
1.62
PW-09
CAP3Q23-PW-09-081023
8/10/2023
320-104266-1
320-104266-1
15 UJ
<5 UJ
--
PW-09
CAP3Q23-PW-09-081023-Z
8/10/2023
320-104266-1
320-104266-2
<5 UJ
<5 UJ
--
PW-09
CAP4Q23-PW-09-110823
11/8/2023
320-106887-1
320-106887-4
<5 UJ
<5 UJ
--
PW-09
CAP4Q23-PW-09-110823-Z
11/8/2023
320-106887-1
320-106887-7
<5 UJ
<5 UJ
--
P7-22
CAP3Q-P7,22-071123
7/11/2023
320-102527-1
320-102527-2
76,000
48,000
1.59
PZ-22
CAP4Q23-PZ-22-110223
11/2/2023
320-106772-1
320-106772-4
84,000
51,000
1.65
River Water Intake 2
RIVER-WATER-INTAKE2-072623
7/26/2023
320-103013-1
1 320-103013-5
1,100
680
1.62
River Water Intake 2
RIVER-WATER-INTAKE2-24-072823
7/28/2023
320-103199-1
320-103199-3
210
130
1.62
River Water Intake 2
RIVER-WATER-INTAKE2-24-112323
11/23/2023
320-107480-1
320-107480-5
1,800
1,200
1.50
SEEP-A-EFF
CAP3Q23-SEEP-A-EFF-24-072723
7/27/2023
320-103013-2
320-103013-1
3,700 J
2,300 J
1.61
SEEP-B-EFF
CAP3Q23-SEEP-B-EFF-24-072723
7/27/2023
320-103013-2
320-103013-2
1,700J
1,1001
1.55
SEEP-C
CAP4Q23-SEEP-C-112323
11/23/2023
320-107480-1
320-1074804
22
14
1.57
SEEP-C-EFF
CAP3Q23-SEEP-C-EFF-24-072723
7/27/2023
1 320-103013-2
320-103013-3
330 J
200 J
1.65
SEEP-D-EFF
CAP3Q23-SEEP-D-EFF-24-072723
7/27/2023
320-103013-1
320-103013-4
370
240
1.54
SMW-10
CAP3Q23-SMW-10-071723
7/17/2023
320-102716-1
320-102716-9
210
130
1.62
SMW-10
CAP4Q23-SMW-I0-111623
11/16/2023
320-107233-1
320-107233-5
230
160
1.44
SMW-11
CAP3Q23-SMW-I1-071723
7/17/2023
320-102716-1
320-102716-11
4,500
3,000
1.50
SMW-1l
CAP4Q23-SMW-I1-110723
11/7/2023
320-106887-1
320-106887-3
6,100
3,800
1.61
SMW-12
CAP3Q23-SMW-12-071823
1 7/18/2023
320-102688-1
320-102688-5
5,900
3,900
1.51
SMW-12
CAP4Q23-SMW-12-110823
11/8/2023
320-107233-1
320-1072334
7,000
4,600
1.52
WC-1
CAP3Q23-WC-1-24-072723
7/27/2023
320-103016-1
320-103016-1
770
500
1.54
WC-1
CAP4Q23-WC-1-112323
11/23/2023
320-107480-1
320-107480-1
250
170
1.47
WC-1
CAP4Q23-WC-1-112323-D
11/23/2023
320-107480-1
320-107480-7
330
210
1.57
Notes:
* PFPrA concentrations were revised following the discovery of a calculation error by the analytical laboratory
- revised and/or original concentration is non -detect; factor not calculated
J - analyte detected; reported value may not be accurate or precise
ng/L - nanograms per liter
PFPrA - perfluoropropanoic acid
UJ - analyte not detected; reporting limit may not be accurate or precise
< - analyte not detected above associated reporting limit
TRl 156 Page 2 of 2 June 2024

GeosMte&
consultants
Geosyntec Consultants of NC, P.C.
NC License No.: C-3500 and C-295
Appendix F
Letter to NCDEQ on Updated PFPrA
Calculation Discussion
TRI 156 - Cape Fear River PFAS Mass Loading Assessment— First Quarter 2024 Report 24 June 2024

9 Chemours-
June 18, 2024
The Chemours Company
Fayetteville Works
22828 NC Highway 87 W
Fayetteville, NC 28306
Updated PFPrA Calculation Discussion and Table of Previously Reported Results Along
with Revised, Corrected Results, Chemours Fayetteville Works, Fayetteville, NC
Perfluoropropanoic acid (PFPrA) is a Table 3+ compound that was added to the Fayetteville Works
commercial analytical suite in June 2023. It is considered an "early eluter" because it is a small
compound (with a three -carbon backbone) that is not retained well on chromatographic columns
and is subject to interferences from the sample matrix, which makes it difficult to analyze.
Analytical improvements such as better sample cleanup using solid -phase extraction cartridges
have made it possible for PFPrA to be analyzed by commercial analytical laboratories Method
537Mod Max.
Certified PFPrA standards did not become available until July 2023. Prior to July 2023,
commercial analytical laboratories were creating their own PFPrA standards from neat liquid
PFPrA. It should be noted that when commercially prepared dilutions of PFPrA were first offered
as certified solutions in July 2023, it was unclear if the solutions were correctly preserved to
prevent esterification (short -chain fluorinated acids were believed to be prone to conversion to the
methyl ester when prepared as methanolic solutions). One of Chemours' commercial analytical
laboratories, Eurofins-Sacramento, conducted an internal comparative investigation in Q1 2024 to
assess the validity of commercial standards. PFPrA standards were purchased from 3 vendors and
compared to a standard correctly prepared at Eurofins- Sacramento. The comparative investigation
indicated that the commercial standards were acceptable, and their use has now been implemented.
On April 23, 2024, Eurofins-Sacramento, informed Chemours via email that a calculation error
had been incorporated into the preparation of calibration standards for PFPrA under the
laboratory's 537 Mod Max methodology. This error occurred when PFPrA standard solutions
prepared at Eurofins-Sacramento did not correctly incorporate the density of neat liquid PFPrA
when adding a known volume of neat liquid PFPrA to water, resulting in the incorrect calculation
of the concentration of the standards. The density of PFPrA was assumed to be 1.0 grams per
milliliter (g/ml), but the true density of liquid PFPrA is 1.56 g/ml. The neat liquid PFPrA was
purchased from Sigma -Aldrich and was 97% pure (see Attachment 1 for Certificate of Analysis).
This level of purity is acceptable under Eurofins-Sacramento's Standard Operating Procedure, and
is slightly purer than the purity of 96% allowed when making standards under EPA Method 537,
from which Eurofins-Sacramento derives its Method 537 Mod Max.
For example, a standard solution created by adding 1.0 milliliters of PFPrA liquid to 1.0 liters of
water was incorrectly determined to have a PFPrA concentration of 1.0 grams per liter (1.0 g/L),
and the correct PFPrA concentration was 1.56 g/L.

The error resulted in a 36% low bias (36% = 100*[1.56 — 1.0]/1.56) in PFPrA concentrations
reported for approximately 550 Chemours samples collected at and in the vicinity of the
Fayetteville Works Site and reported between June 2023 and April 2024. Eurofins-Sacramento is
now using the newly available commercially available certified standards to prepare calibration
curves for PFPrA. Consequently, this error will not be repeated in the future. Chemours informed
the North Carolina Department of Environmental Quality (NCDEQ) of the PFPrA calculation error
via telephone on May 15, 2024, and provided NCDEQ with Eurofins-Sacramento's memo
describing their root cause analysis of the PFPrA calculation error on May 22, 2024 (Attachment
2). PFPrA results that were incorrectly calculated have been corrected by Eurofins-Sacramento
and revised PFPrA results have been provided to Chemours (Table 1).
Due to the requirement for fully defensible Level 4 data for PFPrA, the existing PFPrA results
were not simply multiplied by 1.56 to correct for the low bias, but rather the laboratory generated
the revised PFPrA data through their laboratory information management system (LIMS). Once
reported, the original quantitative data becomes a permanent record in the LIMS, which
necessitates regenerating the quantitative data in order to incorporate a fundamental change in the
calculation basis, such as updated concentrations of calibration standards, and reporting of revised
results. Re -generation of quantitative data includes re -integration of all analyte responses as well
as generation of new calibration response factors and associated calculations of analyte
concentrations. Note that this is a necessary process for many commercial analytical laboratories
when regeneration of results from raw data is required.
Re -integrating chromatographic peaks in both standards and samples may yield different
integrated areas than were originally generated. The different integrated areas in turn yield
different concentrations than expected. A change in concentration due to re -integration can occur
with either automated or manual re -integration but is more likely to occur with manual re-
integration because manual integrations are more subjective than automated integrations. In the
current case, the revised PFPrA concentrations were expected to increase by a factor of 1.56, but
this was not always observed (Table 1). When the PFPrA (or the associated isotope dilution analyte
(IDA)) concentration is low or is impacted by chromatographic interferences, small changes in
integrations may have a significant effect on the results, as described below:
• Samples that contain very small amounts of PFPrA (i.e., the signal-to-noise ratio is large)
- small changes in integration of the PFPrA results in changes to the revised PFPrA
concentration that vary from the factor of 1.56;
• Samples with low IDA response due to extract dilutions necessitated by high target analyte
concentrations - small changes in integration of the IDA results in changes to the revised
PFPrA concentration that vary from the factor of 1.56. Chemours maintains an inventory
of dilutions required for specific sampling locations, so when these locations are sampled
in the future the expected concentrations can be addressed without adverse impacts on the
IDA response; and
• Samples with significant effects from the matrix - the presence of chromatographic
interferences means that the signal-to-noise ratio is large, whether or not the PFPrA or IDA
2

concentrations are small (although matrix effects tend to be more significant at lower
PFPrA or IDA concentrations), which makes integration of the PFPrA and/or the IDA more
variable.
Consequently, each revised PFPrA concentration may not show an increase of exactly 1.56 over
the original concentration (in a few cases, the revised PFPrA concentration is actually lower than
the initial PFPrA concentration). However, the revised PFPrA concentrations increased by an
average factor of 1.57 over the original concentrations, which is close to the expected increase of
1.56. The range in the factor was 0.81 to 2.56, with a standard deviation of 0.14. Ninety-two
percent of the factors fall within one standard deviation of the average (i.e., 92 % of the factors are
between 1.43 and 1.71).
For upcoming Q1 2024 reports due on June 30, 2024, the PFPrA results will be corrected before
they are submitted to NCDEQ. These reports will also include an appendix that provides corrected
PFPrA results for samples collected between June 2023 to December 2023 that were previously
submitted to NCDEQ. Revised lab reports for these 2023 samples will be uploaded to the shared
OneDrive folder at the same time as the lab reports associated with the Q 12024 reports.
Chemours is committed to producing good quality analytical data and will continue to work with
its commercial analytical laboratories to monitor analytical data quality, implement improvements
to analytical methods and communicate with NCDEQ regarding analytical issues.
Enclosures
Table 1 - Revised and Original PFPrA Concentrations
Attachment 1 — Sigma Aldrich Certificate of Analysis for Pentafluoropropionic Acid
Attachment 2 - RE: Investigation and Corrective Action for PFPrA Error

TABLE 1
REVISED AND ORIGINAL PFPRA CONCENTRATIONS
Chemours Fayetteville Works, North Carolina
Sampling Program
Sample ID
Sample Date
Sample Delivery
Group
Laboratory
Sample ID
PFPrA Concentration (ng/L)
Factor
(revised
concentration /
original
concentration)
Revised
Concentration*
Original
Concentration
2023 Perched Zone Sampling
FAY-D-EB-092023
20-Sep-23
320-105128-1
320-105128-1
<5
<5
2023 Perched Zone Sampling
FAY-D-EB-122023
20-Dec-23
320-108308-1
320-108308-1
<5
<5
2023 Perched Zone Sampling
FAY-D-MW-24-092023
20-Sep-23
320-105128-1
320-105128-5
300,000
200,000
1.50
2023 Perched Zone Sampling
FAY-D-MW-24-122023
20-Dec-23
320-108308-1
320-108308-5
150,000 J
170,000 J
0.88
2023 Perched Zone Sampling
FAY-D-NAF-03-092023
20-Sep-23
320-105128-1
320-105128-4
360,000
220,000
1.64
2023 Perched Zone Sampling
FAY-D-NAF-03-122023
20-Dec-23
320-108308-1
320-108308-3
320,000J
370,000J
0.86
2023 Perched Zone Sampling
FAY-D-NAF-03-122023-D
20-Dec-23
320-108308-1
320-108308-4
250,000J
220,000J
1.14
2023 Perched Zone Sampling
FAY-D-NAF-12-092023
20-Sep-23
320-105128-1
320-105128-2
150,000
93,000
1.61
2023 Perched Zone Sampling
FAY-D-NAF-12-092023-D
20-Sep-23
320-105128-1
320-105128-3
190,000
120,000
1.58
2023 Perched Zone Sampling
FAY-D-NAF-12-122023
20-Dec-23
320-108308-1
320-108308-2
350,000J
430,000J
0.81
CAP GW Sampling 3 23
CAPS 23-BCA-04-072023
20-Jul-23
320-102901-1
320-102901-5
79
51
1.55
CAP GW Sampling 3 23
CAPS 23-MW-17D-072023
20-Jul-23
320-102901-1
320-102901-6
1,400
900
1.56
CAP GW Sampling 3 23
CAPS 23-NAF-01-072123
21-Jul-23
320-102898-1
320-102898-1
350,000
220,000
1.59
CAP GW Sampling 3 23
CAPS 23-NAF-02-072023
20-Jul-23
320-102901-1
320-102901-9
1,100,000
660,000
1.67
CAP GW Sampling 3 23
CAPS 23-NAF-03-072023
20-Jul-23
320-102901-1
320-102901-10
58,000 J
37,000 J
1.57
CAP GW Sampling 3 23
CAPS 23-NAF-09-072023
20-Jul-23
320-102901-1
320-102901-1
67,000
42,000
1.60
CAP GW Sampling 3 23
CAPS 23-NAF-10-072023
20-Jul-23
320-102901-1
1 320-102901-2
4,900
3,100
1.58
CAP GW Sampling 3 23
CAPS 23-OW-55-072523
25-Jul-23
320-102898-1
320-102898-7
2,900
1,800
1.61
CAP GW Sampling 3 23
CAPS 23-PIW-12-072423
24-Jul-23
320-102898-1
320-102898-5
2,800
1,700
1.65
CAP GW Sampling 3 23
CAPS 23-PIW-13-072423
24-Jul-23
320-102898-1
320-102898-6
4,600
2,800
1.64
CAP GW Sampling 3 23
CAPS 23-PIW-14-072423
24-Jul-23
320-102898-1
320-102898-4
6,700
4,300
1.56
CAP GW Sampfing 3 23
CAP3 23-PIW-15-072523
25-Jul-23
320-102898-1
320-102898-8
14,000
9,000
1.56
CAP GW Sampling 3 23
CAPS 23-PIW-2D-072023
20-Jul-23
320-102901-1
320-102901-7
18,000
12,000
1.50
CAP GW Sampling 3023
CAPS 23-PW-05-072023
20-Jul-23
320-102901-1
320-102901-4
1,100
790
1.39
CAP GW Sampling 3 23
CAPS 23-PZ-13-072023
20-Jul-23
320-102901-1
320-102901-3
51,000
33,000
1.55
CAP GW Sampling 3 23
CAPS 23-PZ-14-072123
21-Jul-23
320-102898-1
320-102898-2
13,000
7,900
1.65
CAP GW Sarnpling 3 23
CAPS 23-SMW-04B-072023
20-Jul-23
320-102901-1
320-102901-8
3,800
2,400
1.58
CAP GW Sarnpling 3 23
CAPS 23-SMW-05PR-072123
21-Jul-23
320-102898-1
320-102898-3
23,000
15,000
1.53
CAP GW Saxnpling 4 23
CAP4 23-BLADEN-IDR-010424
04-Jan-24
320-108551-1
320-108551-1
200
130
1.54
CAP GW Sampling 4 23
CAP4 23-E BLK-DV-110823
08-Nov-23
320-106887-1
320-106887-6
<5
<5
CAP GW Sampling 4023
CAP4 23-E BLK-DV-110823-Z
08-Nov-23
320-106887-1
320-106887-5
<5
<5
CAP GW Sampling 4 23
CAP4 23-E BLK-PP-010424
04-Jan-24
320-108551-1
320-108551-2
<5
<5
CAP GW Sampling 4 23
CAP4 23-E BLK-PP-110823
08-Nov-23
320-106887-1
320-106887-9
<5
<5
CAP GW Sampling 4 23
CAP4 23-E BLK-PP-110823-Z
08-Nov-23
320-106887-1
320-106887-8
<5
<5
CAP GW Sampling 4 23
CAP4 23-LTW-01-110323
03-Nov-23
320-106773-1
320-106773-1
24,000
14,000
1.71
CAP GW Sampling 4 23
CAP4 23-LTW-02-110323
03-Nov-23
320-106772-1
320-106772-7
21,000
13,000
1.62
CAP GW Sampling 4 23
CAP4 23-LTW-04-110223
02-Nov-23
320-106772-1
320-106772-5
48,000
30,000
1.60
CAP GW Sampling 4023
CAP4 23-LTW-05-110223
02-Nov-23
320-106772-1
320-106772-1
120,000
68,000
1.76
CAP GW Sampling 4 23
CAP4 23-OW-28-110223
02-Nov-23
320-106772-1
320-106772-6
5,500
3,500
1.57
CAP GW Sampling 4 23
CAP4 23-OW-33-110223
02-Nov-23
320-106773-1
320-106773-3
9,400
6,000
1.57
CAP GW Sampling 4 23
CAP4 23-OW-33-110223-D
02-Nov-23
320-106773-1
320-106773-4
9,000
5,900
1.53
CAP GW Sampling 4 23
CAP4 23-PIW-1D-110723
07-Nov-23
320-106887-1
320-106887-1
12,000
7,500
1.60
CAP GW Sampling 4 23
CAP4 23-PIW-1D-110723-Z
07-Nov-23
320-106887-1
320-106887-2
12,000
7,700
1.56
CAP GW Sampling 4 23
CAP4 23-PIW-3D-110323
03-Nov-23
320-106773-1
320-106773-2
21,000
13,000
1.62
CAP GW SamDling 4023
CAP4 23-PIW-7D-110223
02-Nov-23
320-106772-1
320-106772-3
86,000
52,000
1.65
CAP GW Sampling 4 23
CAP4 23-PIW-7S-110223
02-Nov-23
320-106772-1
320-106772-2
18,000
12,000
1.50
CAP GW Sampling 4 23
CAP4 23-PW-06-110623
06-Nov-23
320-106773-1
320-106773-5
840
520
1.62
CAP GW Sampling 4 23
CAP4 23-PW-09-110823
08-Nov-23
320-106887-1
320-106887-4
<5 UJ
<5 UJ
CAP GW Sampling 4 23
CAP4 23-PW-09-110823-Z
08-Nov-23
320-106887-1
320-106887-7
<5 UJ
<5 UJ
CAP GW Sampling 4 23
CAP4 23-PZ-22-110223
02-Nov-23
320-106772-1
320-106772-4
84,000
51,000
1.65
CAP GW Sampling 4 23
CAP4 23-SMW-11-110723
07-Nov-23
320-106887-1
320-106887-3
6,100
3,800
1.61
CAP MW Sampling 3 23
CAPS 23-BCA-01-070723
07-Jul-23
320-102399-1
320-102399-1
34,000
18,000
1.89
CAP MW Sampling 3 23
CAPS 23-BCA-02-070723
07-Jul-23
320-102399-1
1 320-102399-2
13,000
7,300
1.78
CAP MW Sampling 3 23
CAPS 23-BCA-03R-071123
I I-Jul-23
320-102509-1
320-102509-9
110,000 J
69,000 J
1.59
CAP MW Sampling 3 23
CAPS 23-BLADEN-IDR-071223
12-Jul-23
320-102527-1
320-102527-9
240
160
1.50
CAP MW Sampling 3 23
CAPS 23-BLADEN-2D-080223
02-Aug-23
320-103526-1
320-103526-3
<5
<5
CAP MW Sampling 3 23
CAPS 23-BLADEN-2S-080123
01-Aug-23
320-103526-1
320-103526-2
77
48
1.60
CAP MW Sampling 3 23
CAPS 23-BLADEN-3D-082323
23-Aug-23
320-104207-1
320-104207-1
<5
<5
CAP MW Sampling 3 23
CAPS 23-BLADEN-3S-082223
22-Aug-23
320-104225-1
320-104225-5
80
49
1.63
CAP MW Sampling 3 23
CAPS 23-BLADEN-4D-082323
23-Aug-23
320-104207-1
320-104207-2
<5
<5
CAP MW Sampling 3 23
CAPS 23-BLADEN-4S-082323
23-Aug-23
320-104225-1
320-104225-7
16
10
1.60
CAP MW Sampling 3 23
CAPS 23-BLADEN-4S-082323-Z
23-Aug-23
320-104225-1
320-104225-8
16
9.9
1.62
CAP MW Sampling 3 23
CAPS 23-CUMBERLAND-1D-072823
28-Jul-23
320-103202-1
320-103202-2
39
24
1.63
CAP MW Sampling 3 23
CAPS 23-CUMBERLAND-1S-072723
27-Jul-23
320-103202-1
320-103202-1
37
23
1.61
CAP MW Sampling 3 23
CAPS 23-CUMBERLAND-2D-072823
28-Jul-23
320-103202-1
320-1032024
5.7 B
<5
CAP MW Sampling 3023
CAPS 23-CUMBERLAND-2S-072823
28-Jul-23
320-103202-1
320-103202-3
39
23
1.70
CAP MW Sampling 3 23
CAPS 23-CUMBERLAND-3D-082223
22-Aug-23
320-104207-1
320-104207-4
<5
<5
CAP MW Sampling 3 23
CAPS 23-CUMBERLAND-3S-082223
22-Aug-23
320-104207-1
320-104207-6
27
17
1.59
CAP MW Sampling 3 23
CAPS 23-CUMBERLAND-4D-082223
22-Aug-23
320-104225-1
320-104225-4
<5
<5
CAP MW Sampling 3 23
CAPS 23-CUMBERLAND-4S-082223
22-Aug-23
320-104225-1
320-104225-6
96
62
1.55
CAP MW Sampling 3 23
CAPS 23-CUMBERLAND-5DR-082423
24-Aug-23
320-104225-1
320-104225-3
<5
<5
CAP MW Sampling 3 23
CAPS 23-CUMBERLAND-5S-082423
24-Aug-23
320-104225-1
320-104225-10
22
13
1.69
CAP MW Sampling 3 23
CAP3 23-E BLK-BAILER-102423
24-Oct-23
320-106378-1
320-106378-1
<5
<5
CAP MW Sampling 3 23
CAPS 23-E BLK-BAILER-102423-Z
24-Oct-23
320-106378-1
320-106378-2
<5
<5
CAP MW Sampling 3 23
CAPS 23-E BLK-BP-071123
11-Jul-23
320-102509-1
320-102509-10
<5
<5
CAP MW Saxapling 3 23
CAPS 23-E BLK-DV-071223
12-Jul-23
320-102509-1
320-102509-11
<5
<5
CAP MW Sampling 3 23
CAPS 23-E BLK-DV-081623
16-Aug-23
320-104043-1
320-104043-6
<5
<5
CAP MW Sampling 3 23
CAP3 23-E BLK-FILTER-071423
14-Jul-23
320-102718-1
320-102718-11
<5
<5
Page 1 of 5 June 2024

TABLE 1
REVISED AND ORIGINAL PFPRA CONCENTRATIONS
Chemours Fayetteville Works, North Carolina
Sampling Program
Sample ID
Sample Date
Sample Delivery
Group
Laboratory
Sample ID
PFPrA Concentration (ng/L)
Factor
(revised
concentration /
original
concentration)
Revised
Concentration*
Original
Concentration
CAP MW Sampling 3 23
CAPS 23-E BLK-PP-071223
12-Jul-23
320-102527-1
320-102527-10
<5
<5
CAP MW Sampling 3 23
CAPS 23-E BLK-PP-071723
17-Jul-23
320-102718-1
320-102718-10
<5
<5
CAP MW Sampling 3 23
CAPS 23-E BLK-PP-080423
04-Aug-23
320-104043-1
320-104043-4
<5 UJ
<5 UJ
CAP MW Sampling 3 23
CAPS 23-E BLK-PP-081823
18-Aug-23
320-104043-1
320-104043-5
<5
<5
CAP MW Sampling 3 23
CAPS 23-E BLK-PP-102423
24-Oct-23
320-106378-1
320-106378-3
<5
<5
CAP MW Sampling 3 23
CAPS 23-E BLK-PP-102423-Z
24-Oct-23
320-106378-1
320-106378-4
<5
<5
CAP MW Sampling 3 23
CAPS 23-FTA-01-071923
19-Jul-23
320-102791-1
320-102791-1
280
180
1.56
CAP MW Sampling 3 23
CAPS 23-FTA-02-071923
19-Jul-23
320-102791-1
320-102791-2
21,000
14,000
1.50
CAP MW Sampling 3 23
CAPS 23-FTA-02-071923-D
19-Jul-23
320-102791-1
320-102791-3
21,000
13,000
1.62
CAP MW Sampling 3 23
CAPS 23-FTA-03-071923
19-Jul-23
320-102791-1
320-102791-4
14,000
8,600
1.63
CAP MW Sarapling 3 23
CAPS 23-INSITU-01-071323
13-Jul-23
320-102712-1
320-102712-8
850
530
1.60
CAP MW Sarapling 3 23
CAPS 23-LTW-Ol-071323
13-Jul-23
320-102712-1
320-102712-2
22,000
14,000
1.57
CAP MW Sarapling 3 23
CAPS 23-LTW-02-071223
12-Jul-23
320-102527-1
320-102527-8
16,000
11,000
1.45
CAP MW Sarapling 3 23
CAPS 23-LTW-03-071223
12-Jul-23
320-102527-1
320-102527-5
62,000 J
37,000
1.68
CAP MW Sarapling 3 23
CAPS 23-LTW-04-071123
11-Jul-23
320-102527-1
320-102527-1
53,000
29,000
1.83
CAP MW Sanapling 3 23
CAPS 23-LTW-05-071123
11-Jul-23
320-102509-1
320-102509-6
83,000 J
52,000 J
1.60
CAP MW Sanapling 3023
CAPS 23-MW-24-071823
18-Jul-23
320-102688-1
320-102688-1
240,000
150,000
1.60
CAP MW Sanapling 3 23
CAPS 23-MW-13D-071023
10-Jul-23
320-102399-1
320-102399-9
61,000 J
39,000 J
1.56
CAP MW Sampling 3 23
CAPS 23-MW-14D-071323
13-Jul-23
320-102716-1
320-102716-2
130,000
83,000
1.57
CAP MW Sampling 3 23
CAPS 23-MW-15DRR-071123
11-Jul-23
320-102509-1
320-102509-1
8,800
5,300
1.66
CAP MW Sampling 3 23
CAPS 23-MW-16D-071223
12-Jul-23
320-102527-1
320-102527-7
1,000
630
1.59
CAP MW Sampling 3 23
CAPS 23-MW-18D-071723
17-Jul-23
320-102716-1
320-102716-6
680
430
1.58
CAP MW Sampling 3 23
CAP3 23-MW-19D-071023
10-Jul-23
320-102399-1
320-102399-10
960
640
1.50
CAP MW Sampling 3 23
CAPS 23-MW-12S-071823
18-Jul-23
320-102688-1
320-102688-2
6,600
4,300
1.53
CAP MW Sampling 3 23
CAPS 23-MW-20D-071123
11-Jul-23
320-102509-1
320-102509-7
4,900
3,300
1.48
CAP MW Sampling 3 23
CAPS 23-MW-20D-071123-D
11-Jul-23
320-102509-1
320-102509-8
5,300
3,300
1.61
CAP MW Sampling 3 23
CAPS 23-MW-21D-071423
14-Jul-23
320-102716-1
320-102716-4
800
500
1.60
CAP MW Sampling 3 23
CAPS 23-MW-22D-071223
12-Jul-23
320-102527-1
320-102527-4
970
580
1.67
CAP MW Sarapling 3 23
CAPS 23-MW-23-071723
17-Jul-23
320-102718-1
320-102718-2
2,500
1,400
1.79
CAP MW Sarapling 3 23
CAPS 23-MW-1S-071823
18-Jul-23
320-102688-1
320-102688-3
11,000
6,600
1.67
CAP MW Sampling 3 23
CAPS 23-MW-25-071823
18-Jul-23
320-102718-1
320-102718-7
10,000
6,700
1.49
CAP MW Sampling 3 23
CAPS 23-MW-27-071323
13-Jul-23
320-102712-1
320-102712-7
40,000
26,000
1.54
CAP MW Sampling 3 23
CAPS 23-MW-28-071323
13-Jul-23
320-102712-1
320-102712-4
730
460
1.59
CAP MW Sanapling 3 23
CAPS 23-MW-30-071823
18-Jul-23
320-102718-1
320-102718-5
7,000
4,700
1.49
CAP MW Sanapling 3 23
CAPS 23-MW-7S-071823
18-Jul-23
320-102718-1
320-102718-6
5,700
3,900
1.46
CAP MW Sampling 3 23
CAPS 23-MW-9S-071823
18-Jul-23
320-102718-1
320-102718-9
2,900
1,800
1.61
CAP MW Sampling 3 23
CAPS 23-NAF-04-081723
17-Aug-23
320-104207-1
320-104207-7
160,000
100,000
1.60
CAP MW Sampling 3 23
CAPS 23-NAF-05A-102423
24-Oct-23
320-106358-1
320-106358-1
240,000
150,000
1.60
CAP MW Sampling 3 23
CAPS 23-NAF-05A-102423-D
24-Oct-23
320-106358-1
320-106358-2
240,000
150,000
1.60
CAP MW Sampling 3 23
CAPS 23-NAF-05A-102423-D-Z
24-Oct-23
320-106358-1
320-106358-4
240,000
150,000
1.60
CAP MW Sampling 3 23
CAPS 23-NAF-05A-102423-Z
24-Oct-23
320-106358-1
320-106358-3
190,000
120,000
1.58
CAP MW Sampling 3 23
CAPS 23-NAF-06-071923
19-Jul-23
320-102796-1
320-102796-1
380,000
240,000
1.58
CAP MW Sampling 3 23
CAPS 23-NAF-06-071923-Z
19-Jul-23
320-102796-1
320-102796-2
410,000
250,000
1.64
CAP MW Sampling 3 23
CAPS 23-NAF-07-071923
19-Jul-23
320-102796-1
320-102796-3
3,600
2,100
1.71
CAP MW Sarapling 3 23
CAPS 23-NAF-08A-081723
17-Aug-23
320-104225-1
320-104225-2
41,000
26,000
1.58
CAP MW Sampling 3 23
CAPS 23-NAF-11A-071923
19-Jul-23
320-102796-1
320-102796-4
15,000
9,400
1.60
CAP MW Sampling 3 23
CAPS 23-NAF-12-081723
17-Aug-23
320-104225-1
320-104225-1
200,000
130,000
1.54
CAP MW Sampling 3 23
CAPS 23-NAF-13-102423
24-Oct-23
320-106358-1
320-106358-5
10,000
6,600
1.52
CAP MW Sampling 3 23
CAPS 23-NAF-13-102423-Z
24-Oct-23
320-106358-1
320-106358-6
10,000
6,600
1.52
CAP MW Sampling 3 23
CAP3 23-OW-28-071123
11-Jul-23
320-102509-1
320-102509-5
5,200
3,500
1.49
CAP MW Sarnpling 3 23
CAPS 23-OW-30-071323
13-Jul-23
320-102712-1
320-102712-10
19,000
12,000
1.58
CAP MW Sampling 3023
CAPS 23-OW-30-071323-Z
13-Jul-23
320-102712-1
320-102712-11
19,000
12,000
1.58
CAP MW Sampling 3 23
CAPS 23-OW-32-090823
08-Sep-23
320-104780-1
320-104780-1
990
640
1.55
CAP MW Sampling 3 23
CAPS 23-OW-32-090823-D
08-Sep-23
320-104780-1
320-104780-2
970
620
1.56
CAP MW Sampling 3 23
CAP3 23-OW-32-090823-D-Z
08-Sep-23
320-104780-1
320-104780-4
930
620
1.50
CAP MW Sampling 3 23
CAPS 23-OW-32-090823-Z
08-Sep-23
320-104780-1
320-104780-3
1,000
650
1.54
CAP MW Sampling 3 23
CAPS 23-OW-33-071223
12-Jul-23
320-102527-1
320-102527-3
9,900
5,400
1.83
CAP MW Sampling 3 23
CAP3 23-OW-37-081023
10-Aug-23
320-104266-1
320-104266-3
8,200 J
5,200 J
1.58
CAP MW Sampling 3 23
CAPS 23-OW-40-071323
13-Jul-23
320-102712-1
320-102712-9
5,700
3,700
1.54
CAP MW Sampling 3 23
CAPS 23-OW-4R-080423
04-Aug-23
320-103526-1
320-103526-7
25,000
17,000
1.47
CAP MW Sarapling 3 23
CAPS 23-OW-51-080323
03-Aug-23
320-103526-1
320-103526-6
92,000
60,000
1.53
CAP MW Sampling 3 23
CAPS 23-OW-56-073123
31-Jul-23
320-103202-1
320-103202-9
2,200
1,400
1.57
CAP MW Sampling 3 23
CAPS 23-OW-57-073123
31-Jul-23
320-103202-1
320-103202-10
44,000
28,000
1.57
CAP MW Sampling 3 23
CAPS 23-PIW-IODR-071423
14-Jul-23
320-102716-1
320-102716-5
26,000
17,000
1.53
CAP MW Sampling 3 23
CAPS 23-PIW-lOS-071323
13-Jul-23
320-102712-1
320-102712-5
5,300
3,100
1.71
CAP MW SarnDlina 3023
CAPS 23-PIW-11-073123
31-Jul-23
320-103202-1
320-103202-8
3,400
2,000
1.70
CAP MW Sampling 3 23
CAPS 23-PIW-16D-071423
14-Jul-23
320-102716-1
320-102716-3
<5
<5
CAP MW Sampling 3 23
CAPS 23-PIW-16S-071023
10-Jul-23
320-102399-1
320-102399-7
1,100
770
1.43
CAP MW Sampling 3 23
CAP3 23-PIW-1D-080223
02-Aug-23
320-103526-1
320-103526-4
12,000 J
7,800
1.54
CAP MW Sampling 3 23
CAPS 23-PIW-3D-071323
13-Jul-23
320-102712-1
320-102712-1
19,000
11,000
1.73
CAP MW Sampling 3 23
CAPS 23-PIW-4D-071323
13-Jul-23
320-102712-1
320-102712-3
880
550
1.60
CAP MW Sampling 3 23
CAPS 23-PIW-5SR-080423
04-Aug-23
320-103526-1
320-103526-8
44,000
29,000
1.52
CAP MW Sampling 3 23
CAP3 23-PIW-5SR-080423-Z
04-Aug-23
320-103526-1
320-103526-9
40,000
26,000
1.54
CAP MW Sampling 3 23
CAPS 23-PIW-6S-071223
12-Jul-23
320-102527-1
320-102527-6
64,000 J
50,000 J
1.28
CAP MW Sampling 3 23
CAPS 23-PIW-7D-071123
11-Jul-23
320-102509-1
320-102509-3
79,000 J
49,000 J
1.61
CAP MW Sampling 3 23
CAP3 23-PIW-7S-071123
11-Jul-23
320-102509-1
320-102509-2
14,000
9,700
1.44
CAP MW Sampling 3 23
CAPS 23-PIW-8D-071123
11-Jul-23
320-102509-1
320-102509-4
57,000
34,000
1.68
CAP MW Sampling 3 23
CAP3 23-PW-01-071723
17-Jul-23
320-102716-1
320-102716-10
48,000
33,000
1.45
Page 2 of 5 June 2024

TABLE 1
REVISED AND ORIGINAL PFPRA CONCENTRATIONS
Chemours Fayetteville Works, North Carolina
Sampling Program
Sample ID
Sample Date
Sample Delivery
Group
Laboratory
Sample ID
PFPrA Concentration (ng/L)
Factor
(revised
concentration /
original
concentration)
Revised
Concentration*
Original
Concentration
CAP MW Sampling 3 23
CAPS 23-PW-02-071923
19-Jul-23
320-102796-1
320-102796-5
6,400
4,000
1.60
CAP MW Sampling 3 23
CAPS 23-PW-02-071923-Z
19-Jul-23
320-102796-1
320-102796-6
6,600
4,300
1.53
CAP MW Sampling 3 23
CAPS 23-PW-03-071923
19-Jul-23
320-102796-1
320-102796-7
76,000
47,000
1.62
CAP MW Sampling 3 23
CAPS 23-PW-04-072823
28-Jul-23
320-103202-1
320-103202-5
1,400
900
1.56
CAP MW Sampling 3 23
CAPS 23-PW-04-072823-Z
28-Jul-23
320-103202-1
320-103202-6
1,600
890
1.80
CAP MW Sampling 3 23
CAPS 23-PW-06-071023
10-Jul-23
320-102399-1
320-102399-11
920
620
1.48
CAP MW Sampling 3 23
CAPS 23-PW-09-081023
10-Aug-23
320-104266-1
320-104266-1
<5 UJ
<5 UJ
CAP MW Sampling 3 23
CAPS 23-PW-09-081023-Z
10-Aug-23
320-104266-1
320-104266-2
<5 UJ
<5 UJ
CAP MW Sampling 3 23
CAPS 23-PW-IORR-080323
03-Aug-23
320-103526-1
320-103526-5
60,000
39,000
1.54
CAP MW Sampling 3 23
CAPS 23-PW-11-070723
07-Jul-23
320-102399-1
320-102399-3
25,000
17,000
1.47
CAP MW Sarapling 3 23
CAPS 23-PW-12-071723
17-Jul-23
320-102716-1
320-102716-7
22
14
1.57
CAP MW Sarapling 3 23
CAPS 23-PW-13-071323
13-Jul-23
320-102716-1
320-102716-1
<5
<5
CAP MW Sarapling 3 23
CAPS 23-PW-14-070723
07-Jul-23
320-102399-1
320-102399-4
35,000
24,000
1.46
CAP MW Sarapling 3 23
CAPS 23-PW-14-070723-D
07-Jul-23
320-102399-1
320-102399-5
36,000
24,000
1.50
CAP MW Sarapling 3 23
CAPS 23-PW-15R-070723
07-Jul-23
320-102399-1
320-102399-6
91,000 J
58,000 J
1.57
CAP MW Sanapling 3 23
CAPS 23-PZ-11-071723
17-Jul-23
320-102716-1
320-102716-8
2,700
1,500
1.80
CAP MW Sanapling 3023
CAP3 23-PZ-15-071823
18-Jul-23
320-102718-1
320-102718-8
4,500
3,000
1.50
CAP MW Sanapling 3 23
CAP3 23-PZ-19R-081523
15-Aug-23
320-104207-1
320-104207-3
14,000
8,900
1.57
CAP MW Sampling 3 23
CAPS 23-PZ-20R-081523
15-Aug-23
320-104207-1
320-104207-5
13,000
8,200
1.59
CAP MW Sampling 3 23
CAPS 23-PZ-21R-081523
15-Aug-23
320-104225-1
320-104225-9
4,700
2,900
1.62
CAP MW Sampling 3 23
CAPS 23-PZ-24-071723
17-Jul-23
320-102718-1
320-102718-4
2,900
1,700
1.71
CAP MW Sampling 3 23
CAPS 23-PZ-26-071723
17-Jul-23
320-102718-1
320-102718-1
130
91
1.43
CAP MW Sampling 3 23
CAPS 23-PZ-27-071323
13-Jul-23
320-102712-1
320-102712-6
350
230
1.52
CAP MW Sampling 3 23
CAPS 23-PZ-28-071723
17-Jul-23
320-102718-1
320-102718-3
440
310
1.42
CAP MW Sampling 3 23
CAPS 23-PZ-35-082123
21-Aug-23
320-104266-1
320-104266-4
8,700
5,400
1.61
CAP MW Sampling 3 23
CAPS 23-PZ-35-082123-D
21-Aug-23
320-104266-1
320-104266-5
8,600
5,400
1.59
CAP MW Sarapling 3 23
CAPS 23-ROBESON-1D-072823
28-Jul-23
320-103202-1
320-103202-7
23 B
13
1.77
CAP MW Sarapling 3 23
CAPS 23-ROBESON-1S-080123
01-Aug-23
320-103526-1
320-103526-1
39
26
1.50
CAP MW Sampling 3 23
CAPS 23-SMW-Ol-071023
10-Jul-23
320-102399-1
320-102399-8
610
400
1.53
CAP MW Sampling 3 23
CAPS 23-SMW-03B-071923
19-Jul-23
320-102791-1
320-102791-5
150,000
95,000
1.58
CAP MW Sampling 3023
CAPS 23-SMW-06B-081623
16-Aug-23
320-104043-1
320-104043-1
260,000
170,000
1.53
CAP MW Sampling 3 23
CAPS 23-SMW-07-071823
18-Jul-23
320-102688-1
320-102688-4
1,000
500
2.00
CAP MW Sampling 3 23
CAPS 23-SMW-08B-081623
16-Aug-23
320-104043-1
320-104043-2
31,000
20,000
1.55
CAP MW Sampling 3 23
CAPS 23-SMW-08B-081623-D
16-Aug-23
320-104043-1
320-104043-3
31,000
20,000
1.55
CAP MW Sampling 3 23
CAPS 23-SMW-09-071923
19-Jul-23
320-102791-1
320-102791-6
4,800
3,100
1.55
CAP MW Sampling 3 23
CAPS 23-SMW-10-071723
17-Jul-23
320-102716-1
320-102716-9
210
130
1.62
CAP MW Sampling 3 23
CAPS 23-SMW-11-071723
17-Jul-23
320-102716-1
320-102716-11
4,500
3,000
1.50
CAP MW Sampling 3 23
CAPS 23-SMW-12-071823
18-Jul-23
320-102688-1
320-102688-5
5,900
3,900
1.51
CAP MW Sampling 3 23
CAPS-PZ-22-071123
II-Jul-23
320-102527-1
320-102527-2
76,000
48,000
1.58
CAP MW Sampling 4 23
CAP4 23-E BLK-BAILER-110923
09-Nov-23
320-107233-1
320-107233-6
<5
<5
CAP MW Sampling 4 23
CAP4 23-E BLK-BAILER-110923-Z
09-Nov-23
320-107233-1
320-107233-7
<5
<5
CAP MW Sampling 4 23
CAP4 23-LTW-03-111323
13-Nov-23
320-107233-1
320-107233-3
61,000 J
38,000 J
1.61
CAP MW Sampling 4 23
CAP4 23-PW-04-110923
09-Nov-23
320-107233-1
320-107233-1
1,500
960
1.56
CAP MW Sarapling 4 23
CAP4 23-PW-04-110923-Z
09-Nov-23
320-107233-1
320-107233-2
1,500
980
1.53
CAP MW Sampling 4023
CAP4 23-SMW-10-111623
16-Nov-23
320-107233-1
320-107233-5
230
160
1.44
CAP MW Sampling 4 23
CAP4 23-SMW-12-110823
08-Nov-23
320-107233-1
320-107233-4
7,000
4,600
1.52
CAP SW Sampling 3 23
CAPS 23-CFR-BLADEN-072623
26-Jul-23
320-103017-1
320-103017-5
44
26
1.69
CAP SW Sampling 3 23
CAPS 23-CFR-KINGS-080123
01-Aug-23
320-103199-1
320-103199-2
32
21
1.52
CAP SW Sampling 3 23
CAPS 23-CFR-RM-76-072623
26-Jul-23
320-103017-1
320-103017-1
27
17
1.59
CAP SW Sampling 3 23
CAPS 23-CFR-TARHEEL-072723
27-Jul-23
320-103017-1
320-103017-6
44
26
1.69
CAP SW Sampling 3 23
CAPS 23-CFR-TARHEEL-6-072723
27-Jul-23
320-103199-1
320-103199-1
32
20
1.60
CAP SW Sampling 3 23
CAP3 23-E BLK-IS-072723
27-Jul-23
320-103017-1
320-103017-7
<5
<5
CAP SW Sampling 3 23
CAPS 23-E BLK-PP-072723
27-Jul-23
320-103017-1
320-103017-8
<5
<5
CAP SW Sampling 3 23
CAPS 23-GBC-1-072623
26-Jul-23
320-103017-1
320-103017-2
540
330
1.64
CAP SW Sampling 3 23
CAPS 23-LOCK-DAM-NORTH-072623
26-Jul-23
320-103017-1
320-103017-4
5,500
3,300
1.67
CAP SW Sampling 3 23
CAPS 23-LOCK-DAM-SEEP-072623
26-Jul-23
320-103017-1
320-103017-3
22,000
13,000
1.69
CAP SW Sampling 3 23
CAPS 23-OLDOF-1-24-072723
27-Jul-23
320-103013-1
320-103013-6
1,400
920
1.52
CAP SW Sampling 3 23
CAPS 23-OUTFALL-002-24-072723
27-Jul-23
320-103016-1
320-103016-4
730
460
1.59
CAP SW Sampling 3023
CAPS 23-SEEP-A-EFF-24-072723
27-Jul-23
320-103013-2
320-103013-1
3,700 J
2,300 J
1.61
CAP SW Sampling 3 23
CAPS 23-SEEP-B-EFF-24-072723
27-Jul-23
320-103013-2
320-103013-2
1,700 J
1,100 J
1.55
CAP SW Sampling 3 23
CAPS 23-SEEP-C-EFF-24-072723
27-Jul-23
320-103013-2
320-103013-3
330 J
200 J
1.65
CAP SW Sampling 3 23
CAPS 23-SEEP-D-EFF-24-072723
27-Jul-23
320-103013-1
320-103013-4
370
240
1.54
CAP SW Sampling 3 23
CAPS 23-WC-1-24-072723
27-Jul-23
320-103016-1
320-103016-1
770
500
1.54
CAP SW Sampling 3 23
CAPS 23-WC-2-24-072723
27-Jul-23
320-103016-1
320-103016-2
570
360
1.58
CAP SW Sampling 3 23
CAPS 23-WC-3-24-072723
27-Jul-23
320-103016-1
320-103016-3
280
180
1.56
CAP SW Sampling 3023
OUTFALL-002-24-072723-D
27-Jul-23
320-103016-1
320-103016-5
730
480
1.52
CAP SW Sampling 3 23
RIVER-WATER-INTAKE2-072623
26-Jul-23
320-103013-1
320-103013-5
1 1,100
680
1.62
CAP SW Sampling 3 23
RNER-WATER-INTAKE2-24-072823
28-Jul-23
320-103199-1
320-103199-3
210
130
1.62
CAP SW Sampling 4 23
CAP4 23-CFR-BLADEN-120623
06-Dec-23
320-107896-1
320-107896-1
49
31
1.58
CAP SW Sampling 4 23
CAP4 23-CFR-KINGS-121423
14-Dec-23
320-108081-1
320-108081-1
44 J
28 J
1.57
CAP SW Sampling 4 23
CAP4 23-CFR-RM-76-112223
22-Nov-23
320-107648-1
320-107648-1
20
11
1.82
CAP SW Sampling 4 23
CAP4 23-CFR-TARHEEL-120623
06-Dec-23
320-107896-1
320-107896-2
50
32
1.56
CAP SW Sampling 4023
CAP4 23-GBC-1-112223
22-Nov-23
320-107648-1
320-107648-2
680
410
1.66
CAP SW Sampling 4 23
CAP4 23-LOCK-DAM-NORTH-112223
22-Nov-23
320-107648-1
320-107648-5
4,800
3,000
1.60
CAP SW Sampling 4 23
CAP4 23-LOCK-DAM-SEEP-112223
22-Nov-23
320-107648-1
320-107648-3
9,000 J
5,600 J
1.61
CAP SW Sampling 4 23
CAP4 23-LOCK-DAM-SEEP-112223-D
22-Nov-23
0-1077
0-107648-4
600
1,,000 J
0.86
CAP SW Sampling 4 23
2-Nov-2
0-10
320-9
1,600J
1000
1.60480-1
CAP SW Sampling 4 23
CAP4 23-OUTFALL-002-112323
23-Nov-23
320-107480-1
320-107480-6
230
150
1.53
Page 3 of 5 June 2024

TABLE 1
REVISED AND ORIGINAL PFPRA CONCENTRATIONS
Chemours Fayetteville Works, North Carolina
Sampling Program
Sample ID
Sample Date
Sample Delivery
Group
Laboratory
Sample ID
PFPrA Concentration (ng/L)
Factor
(revised
concentration /
original
concentration)
Revised
Concentration*
Original
Concentration
CAP SW Sampling 4 23
CAP4 23-SEEP-C-112323
23-Nov-23
320-107480-1
320-107480-4
22
14
1.57
CAP SW Sampling 4 23
CAP4 23-TARHEEL-24-112423
24-Nov-23
320-107480-1
320-107480-8
37
25
1.48
CAP SW Sawlina 4023
CAP4 23-WC-1-112323
23-Nov-23
320-107480-1
320-107480-1
250
170
1.47
CAP SW Sampling 4 23
CAP4 23-WC-1-112323-D
23-Nov-23
320-107480-1
320-107480-7
330
210
1.57
CAP SW Sampling 4 23
CAP4 23-WC-2-112323
23-Nov-23
320-107480-1
320-107480-2
340 J
220 J
1.55
CAP SW Sampling 4 23
CAP4 23-WC-3-112323
23-Nov-23
320-107480-1
320-107480-3
150
96
1.56
CAP SW Sampling 4 23
RIVER-WATER-INTAKE2-24-112323
23-Nov-23
320-107480-1
320-107480-5
1,800
1,200
1.50
PI Dry Sampling 11/23
DITrailerOutlet-112823
28-Nov-23
320-107660-1
320-107660-3
<5
<5
PII Dry Sampling 11/23
STW-LOC-16-112823
28-Nov-23
320-107660-1
320-107660-4
150,000
95,000
1.58
P I I Dry Sam lin 11/23
STW-LOC-18-4-112823
28-Nov-23
320-107656-1
320-107656-2
43 J
<25 UJ
PII Dry Sampling 11/23
STW-LOC-19A-112823
28-Nov-23
320-107660-1
320-107660-1
46
29
1.59
PI Dry Sampling 11/23
STW-LOC-19B-112823
28-Nov-23
320-107660-1
320-107660-5
25
16
1.56
PI Dry Sampling 11/23
STW-LOC-22-4-112823
28-Nov-23
320-107656-1
320-107656-3
250
160
1.56
P11 Dry Sampling 11/23
STW-LOC-22-4-112823-D
28-Nov-23
320-107656-1
320-107656-4
270
170
1.59
P11 Dry Sampling 11/23
STW-LOC-23C-1-4-112823
28-Nov-23
320-107656-1
320-107656-5
170
120
1.42
PI Dry Sampling 11/23
STW-LOC-23C-2-4-112823
28-Nov-23
320-107656-1
320-107656-6
54
35
1.54
P I I Dry Sam lin 11/23
STW-LOC-23C-3-4-112823
28-Nov-23
320-107656-1
320-107656-7
20
13
1.54
PI Dry Sampling 11/23
STW-LOC-8-4-112823
28-Nov-23
320-107656-1
320-107656-1
870
570
1.53
PI Dry Sampling 11/23
STW-LOC-9A-112823
28-Nov-23
320-107660-1
320-107660-2
110
69
1.59
PI Dry Sampling 11/23
STW-LOC-EB-DR-112823
28-Nov-23
320-107660-1
320-107660-6
<5
<5
PII Dry Sampling 11/23
STW-LOC-EB-IS-112823
28-Nov-23
320-107660-1
320-107660-8
<5
<5
PI Dry Sampling 11/23
STW-LOC-FB-112823
28-Nov-23
320-107660-1
320-107660-7
<5
<5
P I I Dry Sampling 8/23
STW-LOC-l0A-4-080423
04-Aug-23
320-103457-1
320-103457-2
820
540
1.52
P I I Dry Sam lin 8/23
STW-LOC-11-3.66-080423
04-Aug-23
320-103457-1
320-103457-3
230
150
1.53
P I I Dry Sampling 8/23
STW-LOC-12-4-080423
04-Aug-23
320-103457-1
320-103457-4
150
95
1.58
P I I Dry Sampling 8/23
STW-LOC-13-4-080423
04-Aug-23
320-103457-1
320-103457-5
110
68
1.62
P I I Dry Sampling 8/23
STW-LOC-1-4-080423
04-Aug-23
320-103460-1
320-103460-1
150
94
1.60
P I I Dry Sampling 8/23
STW-LOC-14-4-080423
04-Aug-23
320-103457-1
320-103457-6
110
66
1.67
P I I Dry Sampling 8/23
STW-LOC-15-4-080423
04-Aug-23
320-103457-1
320-103457-7
930
610
1.52
P I I Dry Sampling 8/23
STW-LOC-16-080723
07-Aug-23
320-103451-1
320-103451-4
1,400,000
490,000
2.86
PH DrvSamD1inR 8/23
STW-LOC-18-4-080723
07-Aug-23
320-103461-1
320-103461-6
250
160
1.56
P I I Dry Sampling 8/23
STW-LOC-18-4-080723-D
07-Aug-23
320-103461-1
320-103461-7
250
160
1 1.56
P I I Dry Sampling 8/23
STW-LOC-19A-080723
07-Aug-23
320-103451-1
320-103451-1
99
64
1.55
PI Dry Sampling 8/23
STW-LOC-19B-080723
07-Aug-23
320-103451-1
320-103451-2
72
46
1.57
PI Dry Sampling 8/23
STW-LOC-20-4-080423
04-Aug-23
320-103457-1
320-103457-8
470
310
1.52
P I I Dry Sampling 8/23
STW-LOC-21A-080423
04-Aug-23
320-103457-1
320-103457-9
280
180
1.56
P I I Dry Sampling 8/23
STW-LOC-22-4-080723
07-Aug-23
320-103461-1
320-103461-1
140 J
911
1.54
P I I Dry Sam hn 8/23
STW-LOC-23C-1-4-080723
07-Aug-23
320-103461-1
320-103461-3
330
200
1.65
P I I Dry Sampling 8/23
STW-LOC-23C-2-2-080723
07-Aug-23
320-103461-1
320-103461-4
70
44
1.59
P I I Dry Sampling 8/23
STW-LOC-23C-3-4-080723
07-Aug-23
320-103461-1
320-103461-5
210
130
1.62
P I I Dry Sampling 8/23
STW-LOC-2-4-080423
04-Aug-23
320-103460-1
320-103460-2
120
80
1.50
P I I Dry Sampling 8/23
STW-LOC-3-4-080423
04-Aug-23
320-103460-1
320-103460-3
330
190
1.74
P I I Dry Sampling 8/23
STW-LOC-4-4-080423
04-Aug-23
320-103460-1
320-103460-4
130
78
1.67
P I I Dry Sampling 8/23
STW-LOC-5-3-080423
04-Aug-23
320-103460-1
320-103460-5
50
26
1.92
P I I Dry Sam lin 8/23
STW-LOC-7A-4-080423
04-Aug-23
320-103460-1
320-103460-6
140
91
1.54
P I I Dry Sampling 8/23
STW-LOC-7A-4-080423-D
04-Aug-23
320-103460-1
320-103460-7
150
95
1.58
P I I Dry Sampling 8/23
STW-LOC-7B-4-080423
04-Aug-23
320-103460-1
320-103460-8
170
110
1.55
P I I Dry Sampling 8/23
STW-LOC-7C-4-080423
04-Aug-23
320-103460-1
320-103460-9
180
120
1.50
P I I Dry Sampling 8/23
STW-LOC-8-3-080723
07-Aug-23
320-103461-1
320-103461-2
150
93
1.61
P I I Dry Sampling 8/23
STW-LOC-9-4-080423
04-Aug-23
320-103457-1
320-103457-1
750
490
1.53
PI Dry Sampling 8/23
STW-LOC-9A-080723
07-Aug-23
320-103451-1
320-103451-3
460
290
1.59
PI I Dry Sam lin 8/23
STW-LOC-DITrailerOutlet-080823
08-Aug-23
320-103451-1
320-103451-5
<5
<5
P I I Dry Sampling 8/23
STW-LOC-EB-DR-080723
07-Aug-23
320-103451-1
320-103451-9
<5
<5
P I I Dry Sampling 8/23
STW-LOC-EB-IS-080423
04-Aug-23
320-103451-1
320-103451-7
<5
<5
P I I Dry Sampling 8/23
STW-LOC-EB-IS-080723
07-Aug-23
320-103451-1
320-103451-8
<5
<5
P I I Dry Sampling 8/23
STW-LOC-FB-080423
04-Aug-23
320-103451-1
320-103451-6
<5
<5
P I I Dry Sampling 8/23
STW-LOC-FB-080723
07-Aug-23
320-103451-1
320-103451-10
<5
<5
PII Full Sampling 11/23
STW-LOC-1-4-112123
21-Nov-23
320-107670-1
320-107670-1
120 J
76
1.58
PI Full Sampling 11/23
STW-LOC-11-2.66-112223
22-Nov-23
320-107659-1
320-107659-1
220
140
1.57
PI Full Sampling 11/23
STW-LOC-12-4-112223
22-Nov-23
320-107659-1
320-107659-2
120
74
1.62
PI Full Sampling 11/23
STW-LOC-13-4-112223
22-Nov-23
320-107659-1
320-107659-3
170
110
1.55
PI Full Sampling 11/23
STW-LOC-l0A-4-112123
21-Nov-23
320-107670-1
320-107670-10
340
210
1.62
PI Full Sampling 11/23
STW-LOC-14-4-112123
21-Nov-23
320-107659-1
320-1076594
87
54
1.61
PI Full Sampling 11/23
STW-LOC-14-4-112123-D
21-Nov-23
320-107659-1
320-107659-5
88
55
1.60
PI Full Sampling 11/23
STW-LOC-15-4-112123
21-Nov-23
320-107659-1
320-107659-6
340
220
1.55
PI Full Sampling 11/23
STW-LOC-20-4-112123
21-Nov-23
320-107659-1
320-107659-7
240
150
1.60
PI Full Sampling 11/23
STW-LOC-21B-112223
22-Nov-23
320-107659-1
320-107659-8
120
72
1.67
PI I Full Sampling 11/23
STW-LOC-EB-IS-112223
22-Nov-23
320-107670-1
320-107670-11
<5
<5
PI I Full Sampling 11/23
STW-LOC-2-4-112223
22-Nov-23
320-107670-1
320-107670-2
96
63
1.52
PI Full Sampling 11/23
STW-LOC-3-3.66-112223
22-Nov-23
320-107670-1
320-107670-3
280
190
1.47
PI Full Sampling 11/23
STW-LOC-44-112223
22-Nov-23
320-107670-1
320-107670-4
73
48
1.52
PI Full Sampling 11/23
STW-LOC-5-4-112223
22-Nov-23
320-107670-1
320-107670-5
54
36
1.50
PI Full Sampling 11/23
STW-LOC-7A-4-112123
21-Nov-23
320-107670-1
320-107670-6
130J
82
1.59
PI Full Sampling 11/23
STW-LOC-7B-4-112123
21-Nov-23
320-107670-1
320-107670-7
1901
120
1.58
PI Full Sampling 11/23
STW-LOC-7C-4-112123
21-Nov-23
320-107670-1
320-107670-8
1801
110
1.64
PI Full Sampling 11/23
STW-LOC-9-4-112123
21-Nov-23
320-107670-1
320-107670-9
290
180
1.61
PI Full Sampling 11/23
STW-LOC-FB-112223
22-Nov-23
320-107659-1
320-107659-9
<5
<5
PI I Sampling 9/23
DITrailerOutlet-092523
26-Sep-23
320-105406-1
320-105406-10
75
75
Page 4 of 5 June 2024

TABLE 1
REVISED AND ORIGINAL PFPRA CONCENTRATIONS
Chemours Fayetteville Works, North Carolina
Sampling Program
Sample ID
Sample Date
Sample Delivery
Group
Laboratory
Sample ID
PFPrA Concentration (ng/L)
Factor
(revised
concentration /
original
concentration)
Revised
Concentration*
Original
Concentration
P I I Sampling 9/23
STW-LOC-l0A-4-092223
22-Sep-23
320-105437-1
320-105437-2
900
640
1.41
PH Sampling 9/23
STW-LOC-12-092523
25-Sep-23
320-105437-1
320-105437-3
86
55
1.56
Pll Sampling 9/23
STW-LOC-13-4-092223
22-Sep-23
320-105437-1
320-105437-4
170
110
1.55
PH Sampling 9/23
STW-LOC-14-092623
26-Sep-23
320-105410-1
320-105410-1
110
69
1.59
Pll Sampling 9/23
STW-LOC-14-4-092223
22-Sep-23
320-105437-1
320-105437-5
78
49
1.59
PH Sampling 9/23
STW-LOC-16-092523
25-Sep-23
320-105406-1
320-105406-8
120,000 J
79,000 J
1.52
P I I Sampling 9/23
STW-LOC-18-4-092523
25-Sep-23
320-105406-1
320-105406-2
54
34
1.59
P I I Sampling 9/23
STW-LOC-19B-092523
25-Sep-23
320-105406-1
320-105406-9
46
29
1.59
PH Sampling 9/23
STW-LOC-20-4-092223
22-Sep-23
320-105437-1
320-105437-6
180
120
1.50
PH Sampling 9/23
STW-LOC-21B-092523
25-Sep-23
320-105437-1
320-105437-7
290
200
1.45
P I I Sampling 9/23
STW-LOC-22-4-092523
25-Sep-23
320-105406-1
320-105406-3
920J
560J
1.64
P I I Sampling 9/23
STW-LOC-23C-1-4-092523
25-Sep-23
320-105406-1
320-1054064
43
1 27
1.59
P I I Sampling 9/23
STW-LOC-23C-14-092523-D
25-Sep-23
320-105406-1
320-105406-5
40
25
1.60
PH Sampling 9/23
STW-LOC-23C-2-4-092523
25-Sep-23
320-105406-1
320-105406-6
48
31
1.55
PH Sampling 9/23
STW-LOC-2-4-092323
23-Sep-23
320-105410-1
320-105410-2
60
38
1.58
PH Sampling 9/23
STW-LOC-3-4-092323
23-Sep-23
320-105410-1
320-105410-3
150
95
1.58
P11 Sampling 9/23
STW-LOC-4-4-092323
23-Sep-23
320-105410-1
320-105410-4
78
50
1.56
PH Sampling 9/23
STW-LOC-5-4-092323
23-Sep-23
320-105410-1
320-105410-5
37
24
1.54
PH Sampling 9/23
STW-LOC-7A-080423
25-Sep-23
320-105410-1
320-105410-6
290
210
1.38
Pll Sampling 9/23
STW-LOC-7B-4-092223
22-Sep-23
320-105410-1
320-105410-7
310
200
1.55
Pll Sampling 9/23
STW-LOC-7B4-092323-D
22-Sep-23
320-105410-1
320-105410-8
320
210
1.52
P I I Sampling 9/23
STW-LOC-7C-4-092223
22-Sep-23
320-105410-1
320-105410-9
340
230
1.48
P I I Sampling 9/23
STW-LOC-8-4-092523
25-Sep-23
320-105406-1
320-105406-1
1,600
970
1.65
PH Sampling 9/23
STW-LOC-9-4-092223
22-Sep-23
320-105437-1
1 320-105437-1
920
650
1.42
P I I Sampling 9/23
STW-LOC-9A-092523
25-Sep-23
320-105406-1
320-105406-7
510
330
1.55
P I I Sampling 9/23
STW-LOC-EB-DR-092523
25-Sep-23
320-105437-1
320-105437-12
<5
<5
PH Sampling 9/23
STW-LOC-EB-IS-092223
22-Sep-23
320-105437-1
320-105437-10
<5
<5
P I I Sampling 9/23
STW-LOC-EB-IS-092523
25-Sep-23
320-105437-1
320-105437-11
<5
<5
P I I Sampling 9/23
STW-LOC-FB-092223
22-Sep-23
320-105437-1
320-105437-8
<5
<5
PH Sampling 9/23
STW-LOC-FB-092523
25-Sep-23
320-105437-1
320-105437-9
<5
<5
TarheelSampling
CFR-TARHEEL-121823
18-Dec-23
320-108237-1
320-108237-2
37 J
24 J
1.54
TarheelSampling
CFR-TARHEEL-121923
19-Dec-23
320-108237-1
1 320-108237-3
<5
<5
TarheelSampling
CFR-TARHEEL-24-100523
05-Oct-23
320-105969-1
320-105969-1
40
26
1.54
TarheelSampling
CFR-TARHEEL-24-101023
10-Oct-23
320-105969-1
320-105969-2
40
26
1.54
TarheelSampling
CFR-TARHEEL-24-101023-D
10-Oct-23
320-105969-1
320-105969-3
40
27
1.48
TarheelSampling
CFR-TARHEEL-24-101223
12-Oct-23
320-106157-1
320-106157-1
38
25
1.52
Tazheel Sampling
CFR-TARHEEL-24-101623
16-Oct-23
320-106157-1
320-106157-2
55
36
1.53
Tazheel Sampling
CFR-TARHEEL-24-101923
19-Oct-23
320-106379-1
320-106379-1
42
26
1.62
Tazheel Sampling
CFR-TARHEEL-24-102323
23-00-23
320-106379-1
320-106379-2
41
26
1.58
Tazheel Sampling
CFR-TARHEEL-24-102623
26-Oct-23
320-106734-1
1 320-106734-1
26
17
1.53
Tazheel Sampling
CFR-TARHEEL-24-103023
30-Oct-23
320-106734-1
320-106734-2
29 J
19 J
1.53
Tazheel Sampling
CFR-TARHEEL-24-110223
02-Nov-23
320-106957-1
320-106957-1
55
34
1.62
Tazheel Sampling
CFR-TARHEEL-24-110623
06-Nov-23
320-106957-1
320-106957-2
35
23
1.52
Tazheel Sampling
CFR-TARHEEL-24-110923
09-Nov-23
320-107164-1
320-107164-1
37
24
1.54
TarheelSampling
CFR-TARHEEL-24-111323
13-Nov-23
320-107164-1
320-107164-2
40
27
1.48
Tazheel Sampling
CFR-TARHEEL-24-111323-D
13-Nov-23
320-107164-1
320-107164-3
41
27
1.52
Tazheel Sampling
CFR-TARHEEL-24-111623
16-Nov-23
320-107540-1
320-107540-1
45
30
1.50
Tazheel Sampling
CFR-TARIIEEL-24-112023
20-Nov-23
320-107540-1
1 320-107540-2
65
44
1.48
Tazheel Sampling
CFR-TARIIEEL-24-112123
21-Nov-23
320-107540-1
320-107540-3
47
31
1.52
TarheelSampling
CFR-TARHEEL-24-112223
22-Nov-23
320-107540-1
320-107540-4
41
27
1.52
TarheelSampling
CFR-TARHEEL-24-112723
27-Nov-23
320-107657-1
320-107657-1
52 J
33 J
1.58
Tarheel Sampling
CFR-TARHEEL-24-113023
30-Nov-23
320-107657-1
320-107657-2
50 J
32 J
1.56
Tazheel Sampling
CFR-TARHEEL-24-120423
04-Dec-23
320-107894-1
320-107894-1
50
31
1.61
Tazheel Sampling
CFR-TARHEEL-24-120723
07-Dec-23
320-107894-1
320-107894-2
46
29
1.59
Tazheel Sampling
CFR-TARHEEL-24-121123
II-Dec-23
320-108044-1
320-108044-1
41
26
1.58
Tazheel Sampling
CFR-TARHEEL-24-121223
12-Dec-23
320-108044-1
1 320-108044-2
38
24
1.58
Tazheel Sampling
CFR-TARHEEL-24-121223-D
12-Dec-23
320-108044-1
320-108044-3
47
30
1.57
Tazheel Sampling
CFR-TARHEEL-24-121723
17-Dec-23
320-108237-1
320-108237-1
24J
15J
1.60
Tazheel Sam lin
CFR-TARHEEL-24-122523
25-2ec-23
320-108425-1
320-108425-1
15
9.8
1.53
Tazheel Sam lin
CFR-TARHEEL-24-122723
27-Dec-23
320-108425-1
320-108425-2
17
11
1.55
Notes.,
* - PFPrA conceentrations were revised folliwng the discovery of a calculation error by the analytical laboratory
-- - revised and/or original concentration is non -detect; factor not calculated
B - analyte detected in associated method blank
J - analyte detected; reported value may not be accurate or precise
ng/L - nanograms per liter
PFPrA - perfluoropropanoic acid
UJ - analyte not detected; reporting limit may not be accurate or precise
< - analyte not detected above associated reporting limit
Minimum factor = 0.81
Average factor = 1.57
Ma in um facto- 2.86
Standard deviation = 0.14
Page 5 of 5 June 2024

IIII II IIII INIIIIII III III
3780325
ID: ProplonicAcd_00004
Eq).W1729 Prpd: Opn:0411824
PENTAFLUOROPROPIONIC ACID
3050 Spruce Street, Saint Louis, MO 63103, USA
Website: www.sigmaaldrich.com
Email USA: [e-mail]
Outside USA: [e-mail]
Product Name: Certificate of Analysis
Pentaffuoroprop(onic acid - 97%
Product Number:
245917
Batch Number:
MKCV1747
Brand:
ALDRICH
CAS Number:
422-64-0
MDL Number:
MFCD00004170
Formula:
C3 HF5O2
Formula Weight:
164.03 g/mol
Quality Release Date:
06 OCT 2023
Test
Appearance (Color)
Appearance (Form)
Infrared Spectrum
Titration with NaOH
GC (area %)
Larry Coers, Director
Quality Control
Milwaukee, WI US
0
F3C OH
F F
Specification Result
Colorless to Faint Yellow and Colorless
Colorless to Faint Orange
Liquid Liquid
Conforms to Structure Conforms
96.5-103.5% 99.7%
> 96.5 % 100.0 %
Sigma -Aldrich warrants, that at the time of the quality release or subsequent retest date this product conformed to the information
contained in this publication. The current Specification sheet may be available at Sigma-Aldrich.com. For further inquiries, please contact
Technical Service. Purchaser must determine the suitability of the product for its particular use. See reverse side of invoice or packing
slip for additional terms and conditions of sale.
Version Number: 1 Page 1 of 1

tiff eurofins
May 22, 2024
Environment Testing
TestAmerica
The Chemours Company
1007 Market Street
Wilmington, DE 19801
Attn: Michael Aucoin, Corporate Remediation Group
RE: Investigation and Corrective Action for PFPrA Error
Dear Mr. Aucoin,
It is the policy of Eurofins Sacramento to conduct its business with honesty and integrity, to
produce accurate and useable environmental analytical test results and related services, and to
provide the best possible service to our clients. As such, we routinely conduct internal data
reviews to assess our adherence to method requirements and Quality Assurance protocols. If
any issues are noted during these reviews that impact the quality of data, we will notify affected
clients and correct the issue.
Eurofins Sacramento recently identified a calculation error that was incorporated into the
preparation of calibration standards for target analyte Perfluoropropanoic Acid (PFPrA) under
the laboratory's 537M methodology. The calculation error yielded an assigned concentration for
calibration standards that was 36% lower than the actual concentration of PFPrA. Use of these
standards to quantitate PFPrA in client samples (including Chemours) has imparted a low bias
of the same magnitude to results for this analyte reported between May, 2023 and April, 2024.
Root Cause Analysis -
The laboratory conducted a root cause investigation and determined that the incorrect
concentration of PFPrA was assigned to calibration standards when the standards preparation
chemist did not incorporate the density of the pure liquid PFPrA source material (1.56 g/ml) into
the calculated concentration of the initial intermediate dilution prepared from this neat material.
The incorrect assigned concentration for the initial dilution of the PFPrA source material was
then propagated into all `daughter' solutions prepared from the initial dilution, including
calibration solutions.
The laboratory further concluded that the primary root cause of the lapse was insufficient
training of the standards preparation chemist regarding correct preparation of calibration
solutions from neat materials.
Corrective Actions -
The laboratory's standards preparation SOP has been updated to specifically emphasize
density corrections when preparing intermediate solutions volumetrically from neat source
materials, and all standards preparation chemists have been re-trained regarding the content of
the updated SOP.
Eurofins TestAmerica 880 Riverside Parkway T 1 916-373-5600
West Sacramento, CA 95605 www.TestAmericalne.com

Additionally, the laboratory has secured commercially prepared/vendor-certified solutions of
PFPrA for use in the preparation of calibration standards and fortification solutions. Use of the
commercial solutions with certified concentrations of PFPrA will preclude the need to dilute neat
liquid reference materials in the future, and associated corrections for density will no longer be
required. Vendor -certified solutions of PFPrA are now available from several commercial
suppliers, which will facilitate the use of these solutions to provide independent `second -source'
verification of calibration standards.
Eurofins Sacramento prides itself on supplying its clients with reliable quality data, and we have
applied the utmost diligence to our root cause investigation and corrective actions. We are
confident the corrective actions described above and summarized below will prevent recurrence
of any similar error. In summary, these corrective actions include the following:
1) Updated standards preparation SOP emphasizing correct use of density in standards
preparation.
2) Additional training of standards preparation chemists.
3) Use of vendor -certified solutions as the primary source for calibration standards in lieu of
neat liquid PFPrA source materials.
4) Use of second -source vendor -certified solutions (alternate supplier) to verify primary
standards.
Please do not hesitate to contact us if you have additional questions.
Sincerely,
Eric Redman
VP of Technical Services
Eurofins Environment Testing Northern California
Cc: Lam Leung (Chemours)
Sathya Yalvigi (Chemours)
Kevin Garon (Chemours)