2020.11.30_CCOA.p4d_Outfall002ChannelGroundwaterUpwellingInvestigation

OUTFALL 002 CHANNEL NEAR
DUPONT
Groundwater Upwelling Investigation

Chemours Fayetteville Works

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

Prepared by
Geosyntec Consultants of NC, P.C.
2501 Blue Ridge Road, Suite 430
Raleigh, NC 27607
Geosyntec Project Number TR0795
November 2020

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11/30/2020

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TABLE OF CONTENTS
1. INTRODUCTION AND BACKGROUND ......................................................... 1
2. SCOPE AND METHODS .................................................................................... 3
2.1 Analytical Methods ...................................................................................... 3
2.1.1 Sample Packing, Shipping, and Field QA/QC Samples ................. 3
2.2 Investigation Round 1 .................................................................................. 4
2.2.1 Surface Water Composite Sampling ............................................... 4
2.2.2 Channel Water Level Measurements .............................................. 5
2.3 Investigation Round 2 .................................................................................. 5
2.4 Investigation Round 3 .................................................................................. 5
2.4.1 Piezometer Installation and Sampling ............................................. 5
2.4.2 Piezometer Water Level Measurement ........................................... 6
2.4.3 Piezometer Groundwater Sampling ................................................ 6
2.4.4 Thermal Survey ............................................................................... 8
2.4.5 TAR Flow Measurement ................................................................. 8
2.4.6 Outfall Channel Near DuPont Surface Water Samples................... 8
2.4.7 Outfall Channel Sediment Sampling ............................................... 9
2.5 Investigation Round 4 .................................................................................. 9
3. RESULTS ............................................................................................................. 9
3.1 Data Quality ............................................................................................... 10
3.1.1 Table 3+ 17 Compounds ............................................................... 11
3.2 Investigation Round 1 ................................................................................ 12
3.3 Investigation Round 2 ................................................................................ 12
3.4 Investigation Round 3 ................................................................................ 13
3.4.1 Sediment Sampling ....................................................................... 13
3.4.2 Piezometer Installation and Sampling ........................................... 13
3.4.3 Thermal Survey ............................................................................. 14
3.4.4 TAR Flow Measurement and Surface Water Samples ................. 14
3.5 Investigation Round 4 ................................................................................ 15
4. GROUNDWATER UPWELLING ASSESSMENT .......................................... 15
4.1 Groundwater Upwelling Rates .................................................................. 15
4.2 Groundwater Upwelling Mass Discharge .................................................. 17
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4.3 Comparison to Outfall 002 flows and Cape Fear River Mass Loads ........ 17
5. SUMMARY ........................................................................................................ 18
6. REFERENCES ................................................................................................... 19

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LIST OF TABLES
Table 1: Field Parameter Measurements
Table 2: Groundwater and Surface Water Elevations
Table 3: Surface Water Analytical Results – Round 1
Table 4: Surface Water Analytical Results – Round 2
Table 5: Surface Water Analytical Results – Round 3
Table 6: Groundwater Analytical Results – Round 3
Table 7: Sediment Analytical Results – Round 3
Table 8: Surface Water Analytical Results – Round 4
Table 9: Outfall Channel Measured and Calculated Groundwater Upwelling Rates
Table 10: Table 3+ PFAS Mass Discharge

LIST OF FIGURES
Figure 1: Site Location Map
Figure 2: Outfall Channel Investigation Area
Figure 3: Sediment Sampling Locations
Figure 4: Surface Water Results – Round 1
Figure 5: Surface Water Sample Location 7C Transect Results – Round 2
Figure 6: Surface Water Results – Round 2
Figure 7: Surface Water Samples – Round 2 Compounds with Increasing Concentration
Figure 8: Cross-Sections of Piezometer and Outfall Channel Levels
Figure 9: Piezometer Water Levels
Figure 10: Thermal Survey Observations
Figure 11: TAR Flow Measurements
Figure 12: Surface Water Results – Round 4
Figure 13: Mass Discharge Increases
Figure 14: Mass Discharge Comparison (Linear Scale)
Figure 15: Mass Discharge Comparison (Log Scale)

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LIST OF APPENDICES
Appendix A: Laboratory Reports and DVM Workbooks
Appendix B: Piezometer Borehole Logs
ACRONYMS AND ABBREVIATIONS
CO Addendum Addendum to Consent Order Paragraph 12
DVM Data Verification Module
DQO Data Quality Objectives
EIM Environmental Information Management
ft feet
ft bgs feet below the ground surface
GPM gallons per minute
HDPE high-density polyethylene
HFPO-DA hexafluoropropylene oxide dimer acid
MGD millions of gallons per day
ng/kg nanograms per kilogram
ng/L nanograms per liter
NCCW non-contact cooling water
PEPA perfluoroethoxypropyl carboxylic acid
PFMOAA perfluoro-2-methoxyacetic acid
PFAS per- and polyfluoroalkyl substances
PMPA perfluoromethoxypropyl carboxylic acid
RPD relative percent differences
QA/QC quality assurance/quality control
TAR turn-around
µg/s micrograms per second

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EXECUTIVE SUMMARY
This report has been prepared by Geosyntec Consultants of NC, P.C. (Geosyntec) for the
Chemours Company FC, LLC (Chemours) pursuant to paragraph 4(d) of the Addendum
to Consent Order1 Paragraph 12 (CO Addendum) of the Consent Order2 (CO) amongst
Chemours, the North Carolina Department of Environmental Quality (NCDEQ) and Cape
Fear River Watch (CFRW). Paragraph 4(d) requires Chemours to “Complete
investigation to determine whether DuPont non-contact cooling water is causing
groundwater containing PFAS to infiltrate into the outfall channel”
During normal operations between January and November 2020, the operations from
Chemours and its tenants, DuPont and Kuraray, resulted in facility discharges at Outfall
002 of primarily non-contact cooling water (NCCW) at flow rates between 7.2 to 36.5
million gallons per day (MGD) with a median flow of 21.9 MGD. These flows pass
through the Outfall Channel near DuPont. DuPont uses approximately 100,000 gallons
per day of NCCW some of which infiltrates to groundwater and contributes to increasing
water levels in the nearby area on top of naturally occurring water level elevations from
rainfall recharge.
Between July and November 2020 a series of investigations were performed to evaluate
if additional loadings of Table 3+ per- and polyfluoroalkyl substances (PFAS)3 entered
the Outfall Channel near the DuPont Area at the Chemours Fayetteville Works Facility
(the Facility), and degree to which groundwater was potentially upwelling into the Outfall
Channel and contributing to these loadings. The scope and findings of each investigation
are summarized in the list below:
• Round 1 July 2020: Collection of temporal composite surface water samples
upstream and downstream along the outfall channel near DuPont demonstrated a
consistent increase in Table 3+ PFAS mass load between the two locations;
• Round 2 September 2020: Additional surface water sample collection with
additional locations between the upstream and downstream locations which
demonstrated continuous increases in PFAS loads as water travels down the
channel;
• Round 3 October 2020: During TAR, after sediment removal from the Outfall
Channel, a thermal survey was completed and identified areas of groundwater
upwelling into the channel. These additional flows were measured using flumes
in the Outfall Channel and samples were collected to calculate mass loading

1 The CO Addendum was entered into court on August 13, 2020. 2 The CO was entered into court on February 25, 2019. 3 Table 3+ Method PFAS compounds are often related to operations at the Facility
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increases from groundwater upwelling. Piezometers were installed to measure
groundwater gradients and groundwater Table 3+ PFAS concentrations; and
• Round 4 November 2020: After TAR, surface water samples were collected
upstream and downstream in the Outfall Channel to quantify mass discharge
increases associated with groundwater upwelling.
Overall, the results of the investigation demonstrated that Table 3+ PFAS mass loads
were increasing in the Outfall Channel near DuPont, and that groundwater containing
Table 3+ PFAS was upwelling into the Outfall Channel near DuPont. While the
infiltrating DuPont NCCW does contribute to the upwelling in the Outfall Channel, this
upwelling may also occur from existing water levels caused by rainfall recharge.
Both the groundwater upwelling rates and mass discharge increases associated with the
groundwater upwelling were very small compared to Outfall flows and Cape Fear River
mass loads respectively. The groundwater upwelling rate in the Outfall Channel near the
DuPont area was measured and calculated to be between 7 and 17 gpm equivalent to
approximately 0.05% to 0.11% of the median Outfall 002 flow. Meanwhile, the Table 3+
PFAS mass discharge values of 7 to 15 µg/s where equivalent to between 0.05% and
0.19% of the measured first and second quarter Table 3+ Cape Fear River PFAS mass
discharge values as shown in the figure below for PFAS mass discharge increases from
the Outfall channel on October 18, 2020 and November 4 and 5, 2020.

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1. INTRODUCTION AND BACKGROUND
This report was prepared by Geosyntec Consultants of NC, P.C. (Geosyntec) for the
Chemours Company FC, LLC (Chemours) pursuant to the requirements of paragraph 4(d)
of the Addendum to Consent Order Paragraph 12 (CO Addendum). A series of
investigations were completed to assess if there were additional loadings of Table 3+ per-
and polyfluoroalkyl substances (PFAS)4 along the Outfall Channel near the DuPont
(DuPont de Nemours, Inc ) Area at the Chemours Fayetteville Works, North Carolina site
(the Facility, Figure 1), and if DuPont non-contact cooling water (NCCW) use at the
Facility was contributing to these increases. The purpose of this report is to describe the
investigation program conducted, the results of the investigation program and provide a
summary of these results.
The Site conveyance network at the Facility transmits flows of NCCW, treated non-
Chemours process and sanitary waters, and stormwater to Outfall 002 where these flows
discharge to the Cape Fear River. In 2020, during facility operations these flows have
ranged from 7.2 to 36.5 million of gallons per day (MGD), with a median flow of 21.9
MGD5. These flows converge together in the Channel to Outfall 002 near the DuPont
Area (Figure 1). After the last DuPont water addition of NCCW, no additional surface
water flows enter the channel before discharging at Outfall 002.
The DuPont Area is adjacent to this section of the Outfall Channel. DuPont utilizes
approximately 100,000 gallons per day (i.e. 0.1 MGD) of NCCW (Chemours, 2019).
DuPont releases this NCCW to a series of ditches where some the water infiltrates into
the sub-surface, becoming groundwater. These water additions result in water levels
increases adjacent to the channel and are a contributing factor to groundwater upwelling
into the channel.
The investigations described in this report were performed over successive rounds
starting in July 2020 through November 2020 to assess if loading increases were
occurring and the magnitude of increases associated with groundwater upwelling. The
investigation first collected data to determine if the loading increases were indeed
occurring and were not potential artifacts of sampling biases or potential randomness in
the data set. Then subsequent scopes were implemented to assess the degree to which
groundwater could be and was contributing PFAS to the observed loading increases. The
investigation scopes were implemented before, during and after the facility turn-around
(TAR) period in October 2020. During TAR 2020, the facility paused production

4 Table 3+ Method PFAS compounds are often related to operations at the Chemours Fayetteville Works Site (the Site). 5 7.2 to 36.5 MGD is equivalent to 5,000 to 25,300 gallons per minute
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activities, including discharge of NCCW water through the outfall channel, to perform
routine annual maintenance and removed sediment from the Outfall channel.
The remainder of this document is organized as follows:
• Section 2 – Scope and Methods which describes the investigations conducted and
the methods used to implement the investigation;
• Section 3 – Results which describes the results of the investigation;
• Section 4 – Groundwater Upwelling Assessment which evaluates the degree of
groundwater upwelling and associated mass loading;
• Section 5 – Summary which describes this investigation and its findings.

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2. SCOPE AND METHODS
The sequence, scope and purpose of the investigations are shown in the table below and
described in the following subsections. Parsons of NC conducted the field work and
sampling activities described in this document.
Round Period Scope Purpose
1 Jul.
2020
Composite surface water sampling
upstream and downstream in
channel
Assess if loadings occur in
Outfall Channel near
DuPont
2 Sep.
2020
Higher resolution composite
sampling in upstream and
downstream channel
Refine understanding of
loadings occurring in
Outfall Channel near
DuPont
3 Oct.
2020
Install piezometers near channel,
during facility TAR:
- measure flow in channel
- collect water samples,
- conduct thermal survey of
channel,
- collect sediment samples
Assess potential for
loadings from
groundwater based on
TAR and post-TAR
conditions
4 Nov.
2020
Composite surface water sampling
upstream and downstream in
channel
Assess potential loadings
from groundwater after
TAR

2.1 Analytical Methods
Surface water samples collected for analysis during Rounds 1, 2, 3 and 4 were sent to
external laboratories for analysis by the Table 3+ Method. Groundwater samples
collected during Round 3 were sent to the onsite laboratory for analysis by the Table 3+
method.
2.1.1 Sample Packing, Shipping, and Field QA/QC Samples
Upon sample collection, each containerized sample was placed into an insulated sample
cooler. Wet ice was placed around the sample containers within heavy-duty plastic bags
within the sample cooler.
A chain-of-custody form was completed by the field sample custodian for each sample
shipment. Sample locations, sample identification numbers, description of samples,
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number of samples collected, and specific laboratory analyses will be recorded on the
chain-of-custody form.
QA/QC activities were performed in the field and in the laboratories to document the data
quality. Field QA/QC samples were collected and analyzed along with the investigative
samples to determine the potential bias and variability introduced in sample collection,
storage, handling and shipping. Field QA/QC samples were collected including
equipment blanks, field blanks and field duplicates.
2.2 Investigation Round 1
Investigation Round 1 was completed in July 2020 in the Outfall Channel near the DuPont
Area. Five sets of paired 24-hour composite samples were collected at Locations 7C and
20 (Figure 2) on July 16, 23, 27, 28, and 31, 2020, respectively. The samples were taken
at these locations to assess the potential for increases in loading from channel conditions
between the upstream and downstream locations. Samples were sent to an external
laboratory for analysis by the Table 3+ method.
2.2.1 Surface Water Composite Sampling
During Rounds 1, 2 and 4 autosamplers were used to collect 24-hour integrated samples
from the Outfall channel near the DuPont Area. During Round 3 autosamplers were used
with 4-hour integrated samples. The autosamplers collected sample aliquots every hour
for the 24-hour composite samples and every 15 minutes for the 4-hour samples.
The autosampler sample tubing was positioned at a minimum of 2 inches above the
bottom of the channel with the open end of the sample tubing pointed in the downstream
direction to minimize the potential for sediment accumulation and uptake. Autosampler
materials consisted of high-density polyethylene (HDPE) tubing, silicon tubing, and an
HDPE sample reservoir. Water from the sample reservoir was decanted into laboratory
supplied bottles (e.g. 250-milliliter [mL] HDPE bottles for PFAS analysis) and then sent
to an approved laboratory. Field parameters was measured during sample collection by
collecting water directly from the water stream at the beginning of sample collection. The
following water quality parameters were recorded:
• pH;
• Temperature (°C);
• Specific Conductivity (microSiemens per second – µS/cm);
• DO (milligrams per liter – mg/L);
• ORP (milliVolts – mV);
• Turbidity (nephelometric turbidity units – NTU)
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• Odor; and,
• Color.
2.2.2 Channel Water Level Measurements
Water depth was measured at locations across the Outfall Channel using a survey rod and
confirmed based on existing staff gauges. This procedure was also performed during other
investigative rounds.
2.3 Investigation Round 2
Investigation Round 2 was conducted on September 16 and 24, 2020 in the Outfall
Channel near DuPont. Surface water sampling and analysis was conducted to further
assess findings from Round 1 and to further evaluate the spatial nature of the increase in
PFAS loading. Figure 2 shows the locations sampled during Round 2. The details of each
sample are provided below.
• At Location 7C, three 24-hour composite samples were collected to evaluate the
distribution of PFAS concentrations across a sampling transect (i.e., East side,
middle, West side).
• 24-hour composite samples were collected from three (7E, 7D, 7F) points along
the Outfall Channel between Location 7C and Location 20 (Figure 2).
• Location 20 was replaced by Location 20A, approximately 40 feet (ft) upstream
of Location 20 to assess if samples collected at Location 20 are affected by
increased velocity near where the flows discharge to Outfall 002 where the Outfall
Channel enters a sump to a set of buried piping to the Cape Fear River.
2.4 Investigation Round 3
Investigation Round 3 was conducted before and during the TAR in the Outfall Channel
near the DuPont Area to assess the potential contributions from groundwater upwelling
to increased PFAS loads along the Outfall Channel after sediment was removed from the
channel. During TAR, a de minimis amount of non-contact cooling water or process
water is transported in the conveyance network. The investigations took place along the
Outfall Channel between Location 7C and 20 from October 5 through October 19, 2020.
Details for the scope of work conducted in Round 3 are outlined below.
2.4.1 Piezometer Installation and Sampling
Piezometers were installed at ten locations directly north and south of the Outfall Channel
to evaluate the groundwater elevation at the Outfall Channel between October 6 and
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November 5, 2020. The new piezometers, PZ-36 through PZ-45, were used to assess
groundwater elevations and concentrations immediately adjacent to the channel.
Continuous soil cores were collected during well installation for logging. Piezometers
were installed following well construction standards outlined in 15A NCAC 2C. Wells
were developed to remove materials that may be introduced into the subsurface during
drilling. Well development continued until turbidity readings were less than 50 NTUs or
had stabilized following development for an extended period (e.g., turbidity readings that
have not improved for an hour and 3 or more consecutive measurements are within 10%
of each other). Ten one-inch PVC piezometers were installed in total. The piezometers
were installed at depths ranging from 7 to 17 ft bgs and screened lengths of the wells
ranged from 3 to 10 ft bgs with typical intervals between 5 to 9 ft bgs.
2.4.2 Piezometer Water Level Measurement
Water level measurements for piezometers and other nearby monitoring wells were
collected in multiple investigation rounds. At each location, notes on well condition,
weather, date and time of collection, depth to bottom of well and depth to water level
from top of casing was recorded.
Pressure transducers were installed to monitor water levels in site piezometers. The
pressure transducers were installed at a depth of 4-10 feet below the ground surface (ft
bgs), approximately 1 foot above the bottom of the well, upon deployment. Barometric
correction on the logged data was conducted to be able to interpret the continuous data
set.
2.4.3 Piezometer Groundwater Sampling
Groundwater sampling was completed on October 5, 2020 at the newly installed
piezometers, except PZ-38 and PZ-43 which did not produce sufficient water for
sampling. Field equipment was inspected by the program onsite supervisor and calibrated
daily prior to use according to the manufacturer’s recommended guidelines. Field
parameters were measured with a water quality meter after sample collection and
included the following:
• pH;
• Temperature (degrees Celsius [°C]);
• Specific Conductivity (microsiemens per centimeter [µS/cm]);
• Dissolved Oxygen (DO) (milligrams per liter [mg/L]);
• Oxidation-Reduction Potential (ORP) (millivolts [mV];
• Turbidity (nephelometric turbidity units [NTU]);
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• Odor; and,
• Color.
Non-dedicated or non-disposable sampling equipment was decontaminated immediately
before sample collection in the following manner:
1. De-ionized water rinse;
2. Scrub with de-ionized water containing non-phosphate detergent (i.e.,
Alconox®); and
3. De-ionized water rinse.
Disposable equipment (e.g. gloves, tubing, etc.) were not be reused. New sample
containers were used for each sample.
Groundwater samples were collected using low-flow sampling techniques as summarized
below:
1. New disposable or dedicated HDPE tubing was placed at the midpoint of the
well’s screened interval.
2. Water was purged through a flow-through cell attached to a water quality meter
capable of measuring pH, temperature, specific conductivity, DO, and ORP.
3. Water was pumped using a peristaltic pump, with dedicated silicone tubing for
the pump head.
4. Groundwater was pumped directly from submerged tubing through the pump head
to a flow-through cell until field parameters (pH, temperature, specific
conductivity, DO, ORP) and was stabilized within ±10% over three consecutive
readings within a five-minute interval. If field parameters stabilized, but turbidity
remained stable yet elevated greater than 20 NTU, field personnel purged five
well volumes prior to sample collection.
5. Water levels in the designated wells were monitored during purging so that
minimum draw-down of the water column was maintained.
6. Once flow-through cell readings were stable, the flow-through cell was
disconnected, the tubing cut to provide a new clean end and samples were
collected from the discharge of the peristaltic pump in new 250 mL laboratory-
supplied HDPE bottles.
7. Sample identification information (e.g., well/sample identification number,
sample time and date, samplers’ names, preservative, and analytical parameters)
were recorded on the bottle label with permanent ink after the sample was
collected.
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2.4.4 Thermal Survey
A thermal survey was conducted to identify areas of potential groundwater upwelling.
Groundwater temperatures usually reflect the mean annual temperature of a location. For
example, at the Fayetteville Works Site perched zone groundwater temperatures in the
newly installed piezometers near the Outfall Channel were between 23.7 to 30°C (Table
1), while surface water temperatures are close to seasonal average temperature, ranging
from 11.2 to 34.4°C (Table 1) depending on the month the sample was collected (i.e.
warm temperatures in July versus cooler temperatures in November. Forecasted ambient
temperatures for the area were monitored ahead of the survey. The survey was conducted
on October 17, 2020 between 07:30 and 09:30 where ambient air temperatures ranged
between 11 to 18°C.
A thermal imaging camera was used to identify areas of upwelling. Infrared photographs
and corresponding visible light photographs were taken of the bottom and sides of the
Outfall Channel, at least every ten feet, or more frequently if a temperature contrast was
observed. If a temperature contrast was identified through the infrared camera, the
location in the Outfall Channel transect was described in the field notes, and the
coordinates of the location were documented. The observations for this program are
described later in the results section.
2.4.5 TAR Flow Measurement
Flow was measured entering and leaving the Outfall Channel by installing flumes at
Location 7C and Location 20A during TAR. Extra-large 60o trapezoidal flumes were
installed using a pond liner and bentonite to create a seal with the Outfall Channel bottom.
Sandbags were used to funnel water towards the flumes. Data loggers were installed to
measure water elevations in the flumes. The water elevations were then used to calculate
flow rates after the data was barometrically corrected. Flow readings were collected once
every five minutes and data was downloaded before the flumes were removed at the end
of TAR. The measured water flow at both locations was used to calculate the difference
in flow entering and leaving the Outfall Channel to quantify the flow from groundwater
into the Outfall Channel. Flow measurements were recorded between October 15 to 19,
2020.
2.4.6 Outfall Channel Near DuPont Surface Water Samples
Two 4-hour composite surface water samples were collected from the flume installed at
Location 7C and 20A during the TAR on October 18, 2020. Samples were analyzed for
Table 3+ PFAS at the onsite laboratory.
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2.4.7 Outfall Channel Sediment Sampling
During the TAR when the Facility was releasing de minimis water to the Outfall Channel,
sediment samples were collected from nine sample locations along the Outfall Channel
(Figure 3) and analyzed by the Table 3+ solids standard operating procedure. The
sediment sampling was completed on October 12, 2020. All equipment was inspected
prior to use. A location-specific field form and a picture of the sample location was used
to document field conditions.
Sediment samples were collected as spatial composites from at least three locations across
the transect at each location. Samples were collected from approximately the top 2 inches
of sediment. Collected sediment was homogenized before being placed in the sample jars.
Any overlying water in the sample jar after collection was decanted.
The sample bottles for sediment PFAS analysis were 4-ounce HDPE soil jars. For all
samples, jars were pre-cleaned by the vendor to minimize the risk of unplanned sample
contamination from the sample container (i.e., blank contamination).
Sample jars were filled, and the caps were securely fastened after sample collection. For
each sample, at least 11 grams of sediment was collected into each jar. Each sample was
labeled with a unique sample identification number, date, time and location of sampling,
and the initials of the individual collecting the sample. A field form was used to record
information regarding additional items such as quality assurance/quality control
(QA/QC), sample identification, and field observations.
2.5 Investigation Round 4
Surface water sampling and water level evaluation was conducted on November 4 and 5,
2020 after TAR was completed. At four surface water locations (7C-2, 7C, 7E and 20A)
24-hour composite samples for were collected. These locations corresponded to the
surface water sample collection completed in Rounds 1 and 2 and an additional location
(7C-2) upstream of Location 7C, to evaluate PFAS increases in the Outfall Channel
related to observed groundwater upwelling during TAR.
Depth to water was measured for monitoring wells in the vicinity of the Outfall Channel
and the piezometers. Surface water depth was measured at locations in the Outfall
Channel corresponding to these wells.
3. RESULTS
The results of the four rounds of investigation are presented in the sub-sections below.
Data is summarized in figures and tables, as follows:
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• The field parameter measurements recorded from the investigations are provided
in Table 1.
• The measured groundwater and surface water elevations are provided in Table 2.
• Surface water Table 3+ PFAS analytical results from samples collected for
Rounds 1, 2, and 3 are provided in Table 3, Table 4, and Table 5, respectively.
• Groundwater Table 3+ PFAS analytical results from Round 3 are provided in
Table 6.
• Sediment Table3+ PFAS analytical results are provided in Table 7.
• The surface water Table 3+ PFAS analytical results from Round 4 are provided
in Table 8.
The remainder of this section describes the data quality of the results, which Table 3+
PFAS analytes are reported in this results section, and then the results of each
investigation round.
3.1 Data Quality
The analytical data were reviewed using the Data Verification Module (DVM) within the
Locus™ Environmental Information Management (EIM) system, a commercial software
program used to manage data. Following the DVM process, a manual review of the data
was conducted. The DVM and the manual review results were combined in a data review
narrative report for each set of sample results, which were consistent with Stage 2b of the
USEPA Guidance for Labeling Externally Validated Laboratory Analytical Data for
Superfund Use (USEPA-540-R-08-005, 2009). The narrative report summarizes which
samples were qualified (if any), the specific reasons for the qualification, and any
potential bias in reported results. The data usability, in view of the project’s data quality
objectives (DQOs), was assessed, and the data were entered into the EIM system.
The data were evaluated by the DVM against the following data usability checks:
• Hold time criteria;
• Field and laboratory blank contamination;
• Completeness of quality assurance/quality control samples;
• Matrix spike/matrix spike duplicate recoveries and the relative percent differences
(RPDs) between these spikes;
• Laboratory control sample/control sample duplicate recoveries and the RPD
between these spikes;
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• Surrogate spike recoveries for organic analyses; and
• RPD between field duplicate sample pairs.
A manual review of the data was also conducted and includes instrument-related quality
control results for calibration standards, blanks, and recoveries, and manual review of all
chromatographic peaks for Table 3+ compounds. The data review process (DVM plus
manual review) applied the following data evaluation qualifiers to the analytical results
as required:
• J Analyte present, reported value may not be accurate or precise;
• UJ Analyte not present below the reporting limit, reporting limit may not be
accurate or precise; and
• B Analyte present in a blank sample, reported value may have a high bias.
The data review process described above was performed for all laboratory chemical
analytical data generated for the sampling event. The DQOs were met for the analytical
results for accuracy and precision. The data collected are believed to be complete,
representative and comparable, with the exception of R-PSDA, Hydrolyzed PSDA, and
R-EVE.
3.1.1 Table 3+ 17 Compounds
As reported in the Matrix Interference During Analysis of Table 3+ Compounds memorandum
(Geosyntec, 2020a), matrix interference studies conducted by the analytical laboratory
(TestAmerica, Sacramento) have shown that the quantitation of three compounds (R-
PSDA [formerly Byproduct 4], Hydrolyzed PSDA [formerly Byproduct 5], and R-EVE)
is inaccurate due to interferences by the sample matrix in both groundwater and surface
water. Given the matrix interference issues, Total Table 3+ PFAS concentrations are
calculated and presented in the tables of this report in two ways: (i) summing over 17 of
the 20 Table 3+ compounds “Total Table 3+ (sum of 17 compounds)”, i.e., excluding
results of R-PSDA, Hydrolyzed PSDA, and R-EVE, and (ii) summing over 20 of the
Table 3+ compounds “Total Table 3+ (sum of 20 compounds)”. Expressing these data as
a range represents possible values of what these results might be without matrix
interferences. In other words, the sum of all 17 compounds is an underestimate of the
actual value while the sum of the 20 compounds is likely an overestimate of the actual
value.
For clarity the text and figures of this report describe the Table 3+ 17 compound sums
while both Table 3+ and Table 20 compounds sums are included in the tables.
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3.2 Investigation Round 1
Five sets of paired 24-hour composite samples were collected at Locations 7C and 20.
The results for these samples are provided in Table 3 and plotted in Figure 4. The results
indicate that PFAS concentrations were consistently higher at Location 20 than Location
7C at each of the five sample times. The total Table 3+ PFAS (17 compounds)
concentrations at the downstream location 20A ranged from 30 - 80 nanograms per liter
(ng/L) greater than the upstream location 7C. The compound (of the Table 3+ 17
compounds set) with the greatest concentration change between the two locations was
HFPO-DA6 with maximum observed increases of 46 ng/L and 50 ng/L, respectively.
3.3 Investigation Round 2
Composite surface water samples (24-hr) were collected along a transect at Location 7C
(east, west, and middle). Individual composite samples from the middle of the channel
were also collected at downstream locations 7D, 7E, 7F, and 20A on two different
sampling days (September 16 and 24, 2020). The results from this surface water sampling
event are provided in Table 4. The results from the channel transect samples at location
7C are shown in Figure 5 and the other samples in Figure 6 and Figure 7.
The Location 7C channel transect samples indicate that PFAS concentrations in the center
of the channel were the highest for both sampling days. Additionally, concentrations on
the West side of the channel were the lowest on both sampling days. Concentrations in
the middle of the channel compared to the West side of the channel were greater by
approximately a factor of 3 showing heterogeneity in channel concentrations.
The analytical results from surface water samples collected from locations in the channel
between 7C and 20A are shown in Figure 6 and Figure 7. Figure 6 shows the
concentrations for all Table 3+ PFAS, while Figure 7 shows only the analytes with higher
concentrations at Location 20A than at Location 7C. On September 16, 2020,
concentrations of PMPA7 and PFMOAA8 were higher at Location 7C than at Location
20A, and on September 24, 2020, concentrations of PMPA and PEPA9 were higher at
Location 7C than Location 20A. These observations may be related to the heterogeneity
observed in the transect samples collected at Location 7C, described above. Removing
these analytes from plots in Figure 7, the remaining Table 3+ PFAS concentrations are
observed to increase along the length of the Outfall Channel. Excluding PMPA and

6 HFPO-DA - hexafluoropropylene oxide dimer acid 7 PMPA - perfluoromethoxypropyl carboxylic acid 8 PFMOAA - perfluoro-2-methoxyacetic acid 9 PEPA - perfluoroethoxypropyl carboxylic acid
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PFMOAA on September 16, 2020, Table 3+ PFAS mass loading increased by 78 ng/L,
and excluding PMPA and PEPA on September 24, 2020, Table 3+ PFAS mass loading
increased by 18 ng/L. The compound with the greatest loading increase between the two
locations was Hydro-PS Acid with a maximum observed mass discharge increase of 22
ng/L.
3.4 Investigation Round 3
Investigation Round 3 was conducted before and during the October 2020 TAR and
aimed to assess if groundwater was upwelling into the channel and evaluate the relative
potential contribution of PFAS loading increases from groundwater upwelling. The
results of the Round 3 are described below.
3.4.1 Sediment Sampling
Sediment samples were collected at nine locations within the Outfall Channel on October
12, 2020 (Figure 3). The results of the sediment sampling are provided in Table 7. The
total Table 3+ PFAS concentrations in the sediments ranged from non-detect to9,900
nanograms per kilogram (µg/kg). Sediment concentrations were highest where cooling
water channel loadings from the Monomers IXM area had joined the Outfall Channel
with the highest concentration observed at location 7D. The sediment results did exhibit
some spatial variability as is common in soil and sediment samples. For instance, the
parent and duplicate samples at Location 3 had total Table 3+ values of 84 and 6.1 µg/kg,
respectively. Across all the sampling locations, the compound with the highest recorded
concentration was PS-Acid at 9,600 µg/kg at Location 7D.
3.4.2 Piezometer Installation and Sampling
Ten new piezometers (PZ-36 through PZ-45) were installed directly north and south of
the Outfall Channel (Figure 2) to evaluate groundwater elevations directly adjacent to the
channel. Water levels were taken in each of the new piezometers and surface water
elevations were collected adjacent to the piezometers in the channel, provided in Table 2.
The results of the water level measurements are presented in the cross sections shown in
Figure 8. In four (4) of the five (5) cross-sections, hydraulic gradients between the
northern piezometer and the channel water level ranged between 0.02 and 0.17 (Table 9)
suggesting upwelling of groundwater into the channel could potentially occur (water
levels were higher in the piezometer than the Outfall Channel). At Transect 3 piezometer
pair PZ-38 and PZ-43 had groundwater levels below the level of the Outfall Channel
surface water both before, during and after the facility TAR indicating that groundwater
recharge from the channel to the sub-surface was potentially possible here.

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Dataloggers were used to monitor water levels in the piezometers for a period of 31 days
(October 5 to November 6, 2020) during this investigation. Figure 9 shows the
groundwater levels over the monitoring period. Piezometer water levels stay relatively
consistent during normal operations, however after TAR began when both DuPont no
longer discharges NCCW and water flow through the Outfall channel is ceased,
groundwater levels decreased 0.2 – 1.3 ft in elevation. The correlation between the
groundwater levels and TAR suggests a potential hydraulic connection between surface
water flows (DuPont NCCW and Outfall Channel) and groundwater.
Groundwater samples were collected from the eight piezometers in which there was
sufficient water to collect a sample; samples were not collected from PZ-38 and PZ-48 as
these wells were dry or did not produce sufficient water for sampling. The results from
these samples are presented in Table 6. The highest Table 3+ groundwater concentrations
were in PZ-36, PZ-37, PZ-44 and PZ-45 located in transects 4 and 5 nearest Location
20/20A. The concentration of Table 3+ PFAS in these wells ranged from 12,000 to 20,000
ng/L. For the two upgradient piezometers, PZ-44 and PZ-45, HFPO-DA was the highest
concentration compound with concentrations ranging between 6,000 and 7,500 ng/L. For
the two downgradient piezometers, PZ-36 and PZ-37, PFMOAA was the highest
concentration compound with concentrations ranging between 9,300 to 13,000 ng/L. The
concentration of Table 3+ PFAS in the other piezometers were comparatively lower with
total Table 3+ PFAS concentrations ranging between 340 ng/L in a duplicate sample from
PZ-41 to 3,000 ng/L in a sample from PZ-40.
3.4.3 Thermal Survey
Areas of potential groundwater upwelling into the Outfall Channel were assessed during
TAR by monitoring temperature differentials using a thermal camera. A photo log of
locations with observable temperature gradients indicating areas of groundwater
upwelling into the Outfall Channel is shown in Figure 10. Areas of upwelling were
observed along the channel from upstream of Location 7C to Location 20A. Upwelling
was evidenced by the increased temperature flows of water entering the channel.
3.4.4 TAR Flow Measurement and Surface Water Samples
Flow was measured entering and leaving the Outfall Channel by installing flumes at
Locations 7C and Location 20A during TAR. The results of the measurements from the
flumes is shown in Figure 11. Precipitation recorded in a rate of inches of precipitation
per 15-minute interval (inrain/15 min) is indicated on a secondary vertical axis in Figure
11. There were only two rain events on October 16, 2020 (3:15 am and 10:30 am),
resulting in a cumulative 0.01 inrain and 0.02 inrain, respectively.
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Figure 11 shows that Location 20A had an average flowrate of approximately 17 gallons
per minute (gpm) greater than the flowrate at Location 7C. At times the flow rate at 20A
reached up to 50 gpm greater than location 7C flow rates. There was a 70 minute period
on October 17, 2020 where Location 7C had a greater flow rate then Location 20A. This
difference in flow is attributed to a volume of water moving through the channel with the
delay in flow increases due to travel time resulting in higher apparent flow differences.
Surface water samples were collected once from the flumes installed at Location 7C and
20A during TAR and submitted for Table 3+ PFAS analysis. The results from this
sampling event are provided in Table 5. The concentration of Table 3+ PFAS at Location
7C was 21,000 ng/L compared to 14,000 ng/L at Location 20A (Table 5).
3.5 Investigation Round 4
Surface water sampling and water level measurements were conducted from November
3 to November 5, 2020. Table 3+ PFAS results of the 24-hour composite samples for two
surface water locations (7C and 20A) are provided in Table 8. An increase in Table 3+
PFAS (17 compounds) of 19-37 ng/L was measured during sampling events on
November 4 and 5, 2020. The compounds with the greatest observed concentration
increases were PMPA and HFPO-DA at 30 ng/L and 16 ng/L, respectively.
Depth to water was measured at site piezometers and surface water depth was measured
at locations in the Outfall Channel adjacent to these wells. The measurements of these
water elevations are provided in Table 2. The water levels demonstrated that groundwater
discharge was potentially possible after TAR similar to during TAR conditions (Table 9).
4. GROUNDWATER UPWELLING ASSESSMENT
The results of the investigations demonstrated that groundwater containing Table 3+
PFAS is upwelling into portions of the Outfall Channel near DuPont. This section
assesses the magnitude of groundwater upwelling rates and associated mass discharge
increases in the Outfall Channel and then compares these quantities to Outfall 002 flows
and Cape Fear River Table 3+ PFAS mass loads.
4.1 Groundwater Upwelling Rates
During TAR the increase in flow of 17 gpm between locations upstream and downstream
study are locations, 7C and 20A, were interpreted to originate from groundwater
upwelling based on the lack of other surface water inflows and the results of the thermal
survey. Using this measured upwelling rate, Darcy’s law was used to calculate a
combined hydraulic conductivity “𝐾𝐾” and area “𝐴𝐴” parameter “𝐾𝐾𝐴𝐴” to use in an
application of Darcy’s law described below in Equation 1. This “𝐾𝐾𝐴𝐴” parameter was then
used to estimate the magnitude of groundwater upwelling during non-TAR conditions
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when the Outfall Channel was also transmitting regular site water use flows by applying
Equation 1 with the “𝐾𝐾𝐴𝐴” parameter and the gradients calculated from measured Outfall
Channel and groundwater elevations. The results of these calculations are provided in
Table 9.
Using the gradient scaling method for groundwater upwelling rate estimations the pre-
TAR upwelling rate was calculated to be 11 gpm and the post-TAR upwelling rate was
calculated to be 7 gpm. Both of these values are lower than the 17 gpm upwelling rate
measured during TAR due to the lower gradients that exist when the channel is full of
NCCW, but do indicate that groundwater upwelling conditions are expected during non-
TAR conditions when the Outfall Channel is transmitting NCCW flows.
While infiltrating DuPont NCCW contributes upwelling groundwater, this upwelling may
potentially occur even if no DuPont NCCW was infiltrating. During TAR, even at the end
of TAR when no DuPont NCCW had been infiltrating for a period of at least two weeks
there was measurable flow upwelling into the Outfall Channel.
Equation 1: Groundwater Discharge Rate Calculation 𝑄𝑄=𝑖𝑖𝐾𝐾𝐴𝐴
where, 𝑄𝑄 = is the calculated (or measured) groundwater flow rate; 𝐾𝐾 = is the hydraulic conductivity of the material groundwater is flowing through; 𝐴𝐴 = is the area groundwater is flowing through; and 𝑖𝑖 = is the calculated hydraulic gradient calculated per Equation 2 below.

Equation 2: Hydraulic Gradient Calculation 𝑖𝑖=ℎ1 − ℎ2𝑑𝑑1−2
where, 𝑖𝑖 = is the calculated hydraulic gradient; ℎ1 = is the hydraulic head at location 1; ℎ2 = is the hydraulic head at location 2; and 𝑑𝑑1−2 = is the distance between locations 1 and 2 in the same length units as hydraulic
head.
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4.2 Groundwater Upwelling Mass Discharge
Table 3+ PFAS mass discharge increases were calculated for Outfall Channel between
the upstream and downstream locations (7C to 20A) for surface water samples collected
on October 18, 2020 and November 4 and 5, 2020. These dates correspond to Outfall
Channel conditions after sediment had been removed enabling the assumption that any
mass discharge increases were associated with Table 3+ PFAS present in upwelling
groundwater. The results of this calculation are shown below in the table below and in
Figure 13 and in Table 10. Groundwater upwelling into the Outfall Channel is associated
with between a 7 to 15 µg/s Table 3+ PFAS mass discharge increase.
Date Mass Discharge
Increase (µg/s)
October 18, 2020 14
November 4, 2020 7
November 5, 2020 15

4.3 Comparison to Outfall 002 flows and Cape Fear River Mass Loads
The groundwater upwelling rate and associated Table 3+ PFAS mass discharge are very
small compared to Outfall Channel flows and Cape Fear River Mass loads. As shown in
the first table below, the groundwater upwelling rates during the post-TAR conditions
were equivalent to between 0.11% to 0.12% of the total flow. These percentages remain
similar as well when considering the minimum and maximum estimated groundwater
upwelling rates compared to median 2020 Outfall 002 flows of 15,200-gpm (i.e. 21.9
MGD) producing a range of 0.05% to 0.11% of flows originating from groundwater
upwelling.
Scenario
Outfall
Flow (gpm)
Groundwater
Upwelling
(gpm)
Groundwater as
Percentage of
Total Flow (%)
October 18, 2020 (TAR) 19 17 89 %
November 4, 2020 5,800 7 0.12 %
November 5, 2020 6,300 7 0.11 %
Med. Outfall – Min Groundwater 15,200 7 0.05%
Med. Outfall – Max Groundwater 15,200 17 0.11%

Similarly, as shown in the table below and in Figure 14 and Figure 15, groundwater
upwelling Table 3+ PFAS mass discharge into the channel is very small compared to
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TR0795 18 November 2020
Cape Fear River measured mass discharge values. Groundwater upwelling in the Outfall
Channel, which then reaches the Cape Fear River, is equivalent to between 0.05% and
0.19% of the measured mass discharge from the first and second quarter 2020 mass
loading models results (Geosyntec, 2020b).
Date
Outfall Channel
Mass Discharge
Increase (µg/s)
Percentage of 1Q
2020* River Mass
Discharge (%)
Percentage of 2Q
2020* River Mass
Discharge (%)
October 18, 2020 14 0.10 % 0.18 %
November 4, 2020 7 0.05 % 0.09 %
November 5, 2020 15 0.11 % 0.19 %
* The Cape Fear River mass discharge values reported for the first and second quarter
2020 mass loading assessment were 13,400 and 8,000 µg/s.
5. SUMMARY
Pursuant to CO Addendum Paragraph 4(d), Chemours assessed the potential for the
infiltration of DuPont NCCW to cause Table 3+ PFAS mass discharge increases in the
Outfall Channel near DuPont. During normal operations the facility discharges at Outfall
002 between 7.2 to 36.5 MGD with a median flow of 21.9 MGD. All these flows pass
through the Outfall Channel near DuPont. DuPont uses approximately 100,000 gallons
per day of NCCW some of which infiltrates to groundwater and contributes to increasing
water levels in the nearby area on top of naturally occurring water level elevations from
rainfall recharge.
A series of investigations were conducted between July and November 2020. The
investigations demonstrated that Table 3+ PFAS mass discharge was increasing along
this section of the Outfall Channel and that groundwater containing Table 3+ PFAS was
upwelling into the Outfall Channel. While the infiltrating DuPont NCCW does contribute
to the upwelling in the Outfall Channel, this upwelling may also occur from existing water
levels caused by rainfall recharge.
Both the groundwater upwelling rates and mass discharge increases associated with the
groundwater upwelling were very small compared to Outfall flows and Cape Fear River
mass loads respectively. The groundwater upwelling rate in the Outfall Channel near the
DuPont area was measured and calculated to be between 7 and 17 gpm, equivalent to
approximately 0.05% to 0.11% of the median Outfall 002 flow. Meanwhile, the Table 3+
PFAS mass discharge values of 7 to 15 µg/s where equivalent to between 0.05% and
0.19% of the measured first and second quarter Table 3+ Cape Fear River PFAS mass
discharge values.
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6. REFERENCES
AECOM, 2018. Poly and Perfluoroalkyl Substance Quality Assurance Project Plan for
the Chemours Corporate Remediation Group. August 2018.
Chemours, 2020. Chemours Fayetteville Works NPDES Permit Application Update. July
2019
Geosyntec, 2019a. Cape Fear River PFAS Loading Reduction Plan. Chemours
Fayetteville Works. August 2019.
Geosyntec, 2020a. Cape Fear River Table 3+ PFAS Mass Loading Assessment – First
Quarter 2020 Report. Chemours Fayetteville Works. July 2020.
Geosyntec, 2020b. Cape Fear River PFAS Mass Loading Assessment – Second Quarter
2020 Report. Chemours Fayetteville Works. September 2020.

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TR0795 November 2020

TABLES

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TABLE 1
FIELD PARAMETER MEASUREMENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants NC, P.C.
Location Type Location Date pH (S.U.)
Dissolved
Oxygen (mg/L)
Oxidation
Reduction Potential (mV)
Turbidity (NTU)
Specific
Conductance
(µS/cm)
Temperature
(oC)
10/5/2020 5.7 6.3 131 6.82 50.2 24.3
10/5/2020 5.5 5.6 148 129 52.2 24.5
10/5/2020 6.0 5.8 142 885 129 26.2
10/5/2020 5.7 0.4 -107 1060 332 25.4
10/5/2020 5.0 0.3 153 1510 80.9 24.4
10/21/2020 5.5 1.6 150 16.4 60.2 23.7
10/5/2020 5.6 3.0 184 218 331 25.7
10/21/2020 5.7 3.7 129 2.76 265 24.6
10/5/2020 5.2 5.5 165 4760 92.4 26.0
10/21/2020 5.8 1.6 -10.2 5.80 350 30.0
10/5/2020 6.1 4.9 165 4830 261 30.0
10/5/2020 4.9 2.7 198 1520 68.3 24.7
10/21/2020 4.8 5.2 102 15.1 78.7 25.5
10/5/2020 5.7 4.0 79.8 1070 147 25.2
10/21/2020 4.3 3.8 210 6.01 42.6 24.6
07/16/20 7.7 6.8 -17.0 13.9 190 32.7
07/23/20 7.9 3.8 128 12.4 189 34.4
07/27/20 7.6 7.0 123 13.9 190 33.7
07/28/20 7.5 6.7 89.0 39.6 381 32.8
07/31/20 6.9 8.4 193 8.01 339 11.2
09/16/20 7.6 7.4 52.7 10.4 190 28.9
09/24/20 8.0 7.77 -48.2 15.4 216 25.1
11/04/20 8.3 9.0 32.6 10.0 300 20.3
11/05/20 7.8 8.6 126 20.1 265 24.4
09/16/20 7.6 7.2 51.1 8.42 182 29.7
09/24/20 7.9 8.0 -35.5 18.4 205 24.6
11/04/20 8.6 8.6 -25.9 8.35 691 20.0
11/05/20 7.8 8.7 147 19.7 265 22.7
09/16/20 7.6 7.2 54.0 10.5 167 29.2
09/24/20 7.8 8.1 -21.1 22.2 208 24.3
11/04/20 8.3 8.9 18.2 10.4 266 19.6
11/05/20 7.8 8.3 171 10.3 253 23.3
11/04/20 8.3 8.6 11.2 12.1 404 20.2
11/05/20 7.8 8.7 151 17.1 301 24.6
11/04/20 8.3 8.9 18.2 10.4 266 19.6
11/05/20 7.7 8.5 92.9 18.1 289 24.9
11/04/20 8.3 8.8 8.10 11.6 310 19.3
11/05/20 7.8 8.5 153 16.5 257 22.8
09/16/20 7.8 7.4 42.0 10.5 201 28.9
09/24/20 7.8 7.9 -0.900 19.7 194 24.7
09/16/20 7.9 7.3 13.9 7.66 225 28.5
09/24/20 7.8 8.1 9.40 13.5 192 24.7
11/04/20 8.6 8.6 -32.2 7.72 369 20.8
11/05/20 7.7 9.0 134 12.8 244 21.5
11/04/20 8.5 9.0 -25.2 8.33 422 19.7
11/05/20 7.9 8.9 120 17.5 235 21.0
11/04/20 8.6 8.7 -28.8 6.99 772 21.1
11/05/20 7.8 8.9 8.90 9.73 237 20.8
09/16/20 8.4 6.9 -18.8 9.38 396 28.7
09/24/20 7.9 8.9 25.4 14.9 189 24.7
Surface Water
7C East
7C West
7C
7C Mid
7C-2 Mid
7C-2 East
7C-2 West
7E Mid
7E North
7E South
7D
7E
7F
PZ-41Groundwater
PZ-36
PZ-37
PZ-38
PZ-39
PZ-40
PZ-42
PZ-43
PZ-44
PZ-45
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TABLE 1
FIELD PARAMETER MEASUREMENTS
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants NC, P.C.
Location Type Location Date pH (S.U.)
Dissolved
Oxygen (mg/L)
Oxidation
Reduction Potential (mV)
Turbidity (NTU)
Specific
Conductance
(µS/cm)
Temperature
(oC)
07/16/20 7.9 6.8 -14.4 13.8 180 32.8
07/23/20 7.3 7.0 220 12.4 182 34.2
07/27/20 7.4 7.0 145 13.7 289 32.2
07/28/20 7.4 7.2 134 14.1 247 32.4
07/31/20 6.5 8.2 214 9.34 1390 12.6
09/16/20 8.6 5.6 -19.5 7.32 922 28.1
09/24/20 7.8 8.3 19.9 14.3 196 24.7
11/04/20 8.5 8.7 0.900 16.3 356 19.2
11/05/20 8.1 9.2 77.8 15.3 253 20.9
11/04/20 8.4 9.0 4.40 31.1 347 19.6
11/05/20 8.2 9.2 67.8 25.1 274 21.1
11/04/20 8.6 9.3 -6.80 5.72 381 19.8
11/05/20 8.1 9.6 81.8 9.32 249 20.7
Notes:
°C - degrees Celsius
mg/L - milligrams per liter
mS/cm - millisiemens per centimeter
mV- millivolts
NTU - nephelometric Turbidity Unit
S.U. - Standard Units
For spatial composite samples collected in November, field parameters were collected at individual sample
locations before water was composited together.
Surface Water
20A South
20
20A Mid
20A North
20A
TR0795 Page 2 of 2 November 2020
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
TABLE 2GROUNDWATER AND SURFACE WATER ELEVATIONS Chemours Fayetteville Works, North CarolinaGeosyntec Consultants of NC P.C.ProgramAquifer1Well IDNorthing (ft, SPCS NAD83)2Easting (ft, SPCS NAD83)2Gauging Date Screened Interval (ft)TOC Elevation (NAVD 88)3Depth to Water (from TOC)Water Level (ft NAVD88)2020.10 Open Channel Perched Zone10/8/20205 - 8.5135.22.44132.762020.10 Open Channel Perched Zone10/18/20205 - 8.5135.22.90132.302020.10 Open Channel Perched Zone11/3/20205 - 8.5135.22.84132.362020.10 Open Channel Perched Zone10/8/20205 - 8135.562.44133.122020.10 Open Channel Perched Zone10/18/20205 - 8135.563.16132.402020.10 Open Channel Perched Zone11/3/20205 - 8135.562.89132.672020.10 Open Channel Perched Zone10/8/20205 -9137.344.18133.162020.10 Open Channel Perched Zone10/18/20205 - 9137.344.80132.542020.10 Open Channel Perched Zone11/3/20205 - 9137.344.80132.542020.10 Open Channel Perched Zone10/8/20205 - 10137.933.37134.562020.10 Open Channel Perched Zone10/18/20205 - 10137.934.37133.562020.10 Open Channel Perched Zone11/3/20205 - 10137.933.84134.092020.10 Open Channel Perched Zone10/8/20205 - 9138.513.70134.812020.10 Open Channel Perched Zone10/18/20205 - 9138.514.52133.992020.10 Open Channel Perched Zone11/3/20205 - 9138.514.15134.362020.10 Open Channel Perched Zone10/8/20205 - 8.5138.132.89135.242020.10 Open Channel Perched Zone10/18/20205 - 8.5138.133.82134.312020.10 Open Channel Perched Zone11/3/20205 - 8.5138.133.50134.632020.10 Open Channel Perched Zone10/8/20205 - 7138.172.81135.362020.10 Open Channel Perched Zone10/18/20205 - 7138.174.35133.822020.10 Open Channel Perched Zone11/3/20205 - 7138.173.80134.372020.10 Open Channel Perched Zone10/8/20205 - 9137.064.39132.672020.10 Open Channel Perched Zone10/18/20205 - 9137.065.80131.262020.10 Open Channel Perched Zone11/3/20205 - 9137.067.69129.372020.10 Open Channel Perched Zone10/8/20205 - 7136.262.84133.422020.10 Open Channel Perched Zone10/18/20205 - 7136.263.47132.792020.10 Open Channel Perched Zone11/3/20205 - 7136.263.24133.022020.10 Open Channel Perched Zone10/8/20202 - 4135.692.50133.192020.10 Open Channel Perched Zone10/18/20202 - 4135.692.67133.022020.10 Open Channel Perched Zone11/3/20202 - 4135.692.87132.822020.10 Open Channel--10/8/2020------134.902020.10 Open Channel--10/18/2020------134.262020.10 Open Channel--11/3/2020------134.872020.10 Open Channel--10/8/2020------134.402020.10 Open Channel--10/18/2020------133.172020.10 Open Channel--11/3/2020------133.852020.10 Open Channel--10/8/2020------133.702020.10 Open Channel--10/18/2020------133.132020.10 Open Channel--11/3/2020------133.752020.10 Open Channel--10/8/2020------133.102020.10 Open Channel--10/18/2020------132.212020.10 Open Channel--11/3/2020------132.832020.10 Open Channel--10/8/2020------132.802020.10 Open Channel--10/18/2020------131.172020.10 Open Channel--11/3/2020------132.07Notes:1 - Aquifer - refers to primary aquifer unit well screen is estimated to be screened within.2 - Northing and Easting provided in North Carolina State Plane System (zone 3200), North American Datum 1983.3 - Vertical datum is North American Vertical Datum of 1988.ft - feet ; TOC - top of casingNAVD88 - North American Vertical Datum of 1988SPCS NAD83 - State Plane Coordinate System North American Datum 1983PZ-41(Transect 1)PZ-42(Transect 2)PZ-43(Transect 3)PZ-44 (Transect 4)PZ-45(Transect 5)PZ-36 (Transect 5)PZ-37 (Transect 4)PZ-38 (Transect 3)PZ-39(Transect 2)PZ-40(Transect 1)Surface Water Transect 1Surface Water Transect 2Surface Water Transect 3Surface Water Transect 4Surface Water Transect 5396086.17396042.4395970.01395921.87395943.02395979.29395961.73396011.61396082.75396124.41395961.1551395941.8002395990.8102396062.5752396105.292051331.442051050.052050569.662050238.182050031.92050048.972050230.232050567.892051045.252051323.032050040.4352050234.2052050568.7752051047.652051327.235TR0795 Page 1 of 1November 2020DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
TABLE 3 SURFACE WATER ANALYTICAL RESULTS - ROUND 1 Chemours Fayetteville Works, North CarolinaGeosyntec Consultants of NC P.C.Sampling ProgramOpen Channel Sampling Open Channel Sampling Open Channel Sampling Open Channel Sampling Open Channel Sampling Open Channel SamplingLocation IDLoc7CLoc7CLoc7CLoc7CLoc7CLoc7CField Sample ID LOC-7C-24-071620LOC-7C-24-071620-DLOC-7C-24-072320LOC-7C-24-072720LOC-7C-24-072820LOC-7C-24-073120Sample Date7/16/20207/16/20207/23/20207/27/20207/28/20207/31/2020QA/QCDuplicateSample TypeCompositeCompositeCompositeCompositeCompositeCompositeSample Delivery Group (SDG) 320-62878-1 320-62878-1 320-63032-1 320-63286-1 320-63295-1 320-63455-1Lab Sample ID 320-62878-1320-62878-2320-63032-2320-63286-2320-63295-2320-63455-2Table 3+ SOP (ng/L)HFPO-DA323221152255PFMOAA262821<2<2<2PFO2HxA222118121515PFO3OA4.64.54.42.42.43.1PFO4DA2.1<22.6<2<2<2PFO5DA<2<2<2<2<2<2PMPA555933313737PEPA<10<10<10<10<10<10PS Acid13133.93.21225Hydro-PS Acid7.27.37.25.46.76.8R-PSDA28 J30 J<2<2<2<2Hydrolyzed PSDA98 J100 J73 J55 J100 J80 JR-PSDCA<2<2<2<2<2<2NVHOS8.5 J4.6 J2.82.83.7<2EVE Acid3.93.6<2<23.710Hydro-EVE Acid<2<2<2<2<2<2R-EVE5.9 J6.5 J<2<2<2<2PES<2<2<2<2<2<2PFECA B<2<2<2<2<2<2PFECA-G<2<2<2<2<2<2Total Table 3+ (17 compounds)17017011072100150Total Table 3+ (20 compounds)310310190130200230TR0795Page 1 of 4November 2020DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
TABLE 3 SURFACE WATER ANALYTICAL RESULTS - ROUND 1 Chemours Fayetteville Works, North CarolinaGeosyntec Consultants of NC P.C.Sampling ProgramLocation IDField Sample IDSample DateQA/QCSample TypeSample Delivery Group (SDG)Lab Sample IDTable 3+ SOP (ng/L)HFPO-DAPFMOAAPFO2HxAPFO3OAPFO4DAPFO5DAPMPAPEPAPS AcidHydro-PS AcidR-PSDAHydrolyzed PSDAR-PSDCANVHOSEVE AcidHydro-EVE AcidR-EVEPESPFECA BPFECA-GTotal Table 3+ (17 compounds)Total Table 3+ (20 compounds)Open Channel Sampling Open Channel Sampling Open Channel Sampling Open Channel Sampling Open Channel Sampling Open Channel SamplingLOC20LOC20LOC20LOC20LOC20LOC20LOC-20-24-071620LOC-20-24-071620-DLOC-20-24-072320LOC-20-24-072720LOC-20-24-072820LOC-20-24-0731207/16/20207/16/20207/23/20207/27/20207/28/20207/31/2020DuplicateCompositeCompositeCompositeCompositeCompositeComposite320-62878-1 320-62878-1 320-63032-1 320-63286-1 320-63295-1 320-63455-1320-62878-3320-62878-4320-63032-1320-63286-1320-63295-1320-63455-1787754465355252517<2<2<22525241717185.4 J4.67.52.73.23.22.72.23.42.522.2<2<2<2<2<2<2696428414338<10<10<10<10<10<103027201435407.67.47.45.57.56.841 J36 J<2<227 J<2140 J130 J82 J77 J150 J96 J<2<2<2<2<2<24.24.43.44.14.1<26.87.33.8<21216<2<2<2<2<2<210 J8.8 J<2<23.4 J<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2250240170130180180440420250210360280TR0795Page 2 of 4November 2020DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
TABLE 3 SURFACE WATER ANALYTICAL RESULTS - ROUND 1 Chemours Fayetteville Works, North CarolinaGeosyntec Consultants of NC P.C.Sampling ProgramLocation IDField Sample IDSample DateQA/QCSample TypeSample Delivery Group (SDG)Lab Sample IDTable 3+ SOP (ng/L)HFPO-DAPFMOAAPFO2HxAPFO3OAPFO4DAPFO5DAPMPAPEPAPS AcidHydro-PS AcidR-PSDAHydrolyzed PSDAR-PSDCANVHOSEVE AcidHydro-EVE AcidR-EVEPESPFECA BPFECA-GTotal Table 3+ (17 compounds)Total Table 3+ (20 compounds)Open Channel Sampling Open Channel Sampling Open Channel Sampling Open Channel Sampling Open Channel Sampling Open Channel SamplingEBEBEBEBFBLKFBLKEQBLK-20-071720EQBLK-7C-071720LOC-20-EB-072820LOC-7C-EB-072820FBLK-20-071720FBLK-7C-0717207/17/20207/17/20207/28/20207/28/20207/17/20207/17/2020GrabGrabEquipment BlankEquipment BlankField BlankField BlankGrabGrabGrabGrabGrabGrab320-62878-1320-62878-1320-63295-1320-63295-1320-62878-1320-62878-1320-62878-7320-62878-5320-63295-5320-63295-3320-62878-8320-62878-6<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<20<20<20<20<20<20<10<10<10<10<10<10<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2NDNDNDNDNDNDNDNDNDNDNDNDTR0795Page 3 of 4November 2020DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
TABLE 3 SURFACE WATER ANALYTICAL RESULTS - ROUND 1 Chemours Fayetteville Works, North CarolinaGeosyntec Consultants of NC P.C.Sampling ProgramLocation IDField Sample IDSample DateQA/QCSample TypeSample Delivery Group (SDG)Lab Sample IDTable 3+ SOP (ng/L)HFPO-DAPFMOAAPFO2HxAPFO3OAPFO4DAPFO5DAPMPAPEPAPS AcidHydro-PS AcidR-PSDAHydrolyzed PSDAR-PSDCANVHOSEVE AcidHydro-EVE AcidR-EVEPESPFECA BPFECA-GTotal Table 3+ (17 compounds)Total Table 3+ (20 compounds)Open Channel Sampling Open Channel SamplingFBLKFBLKLOC-20-FB-072820LOC-7C-FB-0728207/28/20207/28/2020Field BlankField BlankGrabGrab320-63295-1320-63295-1320-63295-6320-63295-4Notes:<2<2Bold - Analyte detected above associated reporting limit<2<2J - Analyte detected. Reported value may not be accurate or precise<2<2ND - no Table 3+ analytes were detected above the associated reporting limits<2<2ng/L - nanograms per liter<2<2QA/QC - Quality assurance/ quality control<2<2SDG - Sample Delivery Group<20<20SOP - standard operating procedure<10<10UJ - Analyte not detected. Reporting limit may not be accurate or precise.<2<2< - Analyte not detected above associated reporting limit.<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2NDNDNDNDTR0795Page 4 of 4November 2020DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
TABLE 4 SURFACE WATER ANALYTICAL RESULTS - ROUND 2 Chemours Fayetteville Works, North CarolinaGeosyntec Consultants of NC P.C.Sampling ProgramSupplemental Open Channel SamplingSupplemental Open Channel SamplingSupplemental Open Channel SamplingSupplemental Open Channel SamplingSupplemental Open Channel SamplingLocation IDLOC7CLoc7CLOC7CLOC7DLOC7EField Sample ID LOC-7C-EAST-24-091620 LOC-7C-MID-24-SPLIT-A-091620 LOC-7C-WEST-24-091620LOC-7D-24-091620LOC-7E-24-091620Sample Date9/16/20209/16/20209/16/20209/16/20209/16/2020QA/QCSample TypeCompositeCompositeCompositeCompositeCompositeSample Delivery Group (SDG)320-64773-1320-64771-1320-64773-1320-64773-1320-64773-1Lab Sample ID320-64773-2320-64771-1320-64773-1320-64773-3320-64773-4Table 3+ (ng/L)HFPO-DA3930233132PFMOAA<213 J<2<2<2PFO2HxA109.59.89.910PFO3OA<2<2<2<2<2PFO4DA<2<2<2<2<2PFO5DA<2<2<2<2<2PMPA<2066<20<20<20PEPA<10<10<10<10<10PS Acid5022153030Hydro-PS Acid3214112122R-PSDA41 J32 J5.7 J16 J30 JHydrolyzed PSDA100 J82 J54 J80 J84 JR-PSDCA5.52.3<23.23.7NVHOS7.1103.45.96EVE Acid198.85.71212Hydro-EVE Acid5.92.6<23.64R-EVE16 J29 J2 J18 J21 JPES<2<2<2<2<2PFECA B<2<2<2<2<2PFECA-G<2<2<2<2<2Total Table 3+ (17 compounds)17018068120120Total Table 3+ (20 compounds)330320130230250TR0795Page 1 of 4November 2020DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
TABLE 4 SURFACE WATER ANALYTICAL RESULTS - ROUND 2 Chemours Fayetteville Works, North CarolinaGeosyntec Consultants of NC P.C.Sampling ProgramLocation IDField Sample IDSample DateQA/QCSample TypeSample Delivery Group (SDG)Lab Sample IDTable 3+ (ng/L)HFPO-DAPFMOAAPFO2HxAPFO3OAPFO4DAPFO5DAPMPAPEPAPS AcidHydro-PS AcidR-PSDAHydrolyzed PSDAR-PSDCANVHOSEVE AcidHydro-EVE AcidR-EVEPESPFECA BPFECA-GTotal Table 3+ (17 compounds)Total Table 3+ (20 compounds)Supplemental Open Channel SamplingSupplemental Open Channel SamplingSupplemental Open Channel SamplingSupplemental Open Channel SamplingSupplemental Open Channel SamplingLOC7F LOC20ALOC7C LOC7C LOC7CLOC-7F-24-091620 LOC-20A-21-SPLIT-A-091620LOC-7C-EAST-24-092420 LOC-7C-MID-24-SPLIT-A-092420 LOC-7C-WEST-24-0924209/16/2020 9/16/20209/24/2020 9/24/2020 9/24/2020CompositeCompositeComposite Composite Composite320-64773-1320-64782-1320-65182-1320-65175-1320-65182-1320-64773-5320-64782-1320-65182-2320-65175-1320-65182-13444332725<2<2 UJ7.98.7 J101011 J141312<22.53.12.32.7<2<2<2<2<2<2<2<2<2<2<203537190 J46<10<10<1080<103538431610273630161118 J77 J100 J22 J46 J76 J96 J71 J49 J56 J4.46.12.9<2<26144.24.2<214195.52.6<24.86.52<2<211 J52 J16 J6.8 J5.2 J<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2140210180360120240440370440220TR0795Page 2 of 4November 2020DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
TABLE 4 SURFACE WATER ANALYTICAL RESULTS - ROUND 2 Chemours Fayetteville Works, North CarolinaGeosyntec Consultants of NC P.C.Sampling ProgramLocation IDField Sample IDSample DateQA/QCSample TypeSample Delivery Group (SDG)Lab Sample IDTable 3+ (ng/L)HFPO-DAPFMOAAPFO2HxAPFO3OAPFO4DAPFO5DAPMPAPEPAPS AcidHydro-PS AcidR-PSDAHydrolyzed PSDAR-PSDCANVHOSEVE AcidHydro-EVE AcidR-EVEPESPFECA BPFECA-GTotal Table 3+ (17 compounds)Total Table 3+ (20 compounds)Supplemental Open Channel SamplingSupplemental Open Channel SamplingSupplemental Open Channel SamplingSupplemental Open Channel SamplingSupplemental Open Channel SamplingLOC7DLOC7ELOC7FLOC20AEBLOC-7D-24-092420LOC-7E-24-092420LOC-7F-24-092420 LOC-20A-24-SPLIT-A-092420EB-SPLIT-A-0916209/24/20209/24/20209/24/20209/24/20209/16/2020Equipment BlankComposite Composite Composite CompositeGrab320-65182-1 320-65182-1320-65182-1 320-65177-1320-64799-1320-65182-3 320-65182-4320-65182-5 320-65177-1320-64799-127 29 28 30<28.4 9.5 8.7 18 J<213 12 13 14<22.9 2.8 3 2.7<2<2 <2 <2 <2<2<2 <2 <2 <2<233 28 52 28<20<10 <10 <10 <10<1017 19 20 23<217 16 17 19<262 J 54 J 67 J 56 J<254 J 51 J 58 J 58 J<2<2 <2 <22<23.9 2.8 2.6 3.5<232.933.4<2<2 <2 <2 <2<212 J 6.3 J 8.3 J 7.1 J<2<2 <2 <2 <2<2<2 <2 <2 <2<2<2 <2 <2 <2<2130 120 150 140ND250 230 280 260NDTR0795Page 3 of 4November 2020DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
TABLE 4 SURFACE WATER ANALYTICAL RESULTS - ROUND 2 Chemours Fayetteville Works, North CarolinaGeosyntec Consultants of NC P.C.Sampling ProgramLocation IDField Sample IDSample DateQA/QCSample TypeSample Delivery Group (SDG)Lab Sample IDTable 3+ (ng/L)HFPO-DAPFMOAAPFO2HxAPFO3OAPFO4DAPFO5DAPMPAPEPAPS AcidHydro-PS AcidR-PSDAHydrolyzed PSDAR-PSDCANVHOSEVE AcidHydro-EVE AcidR-EVEPESPFECA BPFECA-GTotal Table 3+ (17 compounds)Total Table 3+ (20 compounds)Supplemental Open Channel SamplingSupplemental Open Channel SamplingSupplemental Open Channel SamplingEBFBLKFBLKEB-SPLIT-A-092420FB-SPLIT-A-091620FB-SPLIT-A-0924209/24/20209/16/20209/24/2020Equipment BlankField BlankField BlankGrabGrabGrab320-65186-1320-64799-1320-65186-1320-65186-1320-64799-5320-65186-5<2<2<2Notes:<2<2<2Bold - Analyte detected above associated reporting limit<2<2<2J - Analyte detected. Reported value may not be accurate or precise<2<2<2ND - no Table 3+ analytes were detected above the associated reporting limits<2<2<2ng/L - nanograms per liter<2<2<2 QA/QC - Quality assurance/ quality control<20<20<20 SDG - Sample Delivery Group<10<10<10 SOP - standard operating procedure<2<2<2 UJ - Analyte not detected. Reporting limit may not be accurate or precise.<2<2<2< - Analyte not detected above associated reporting limit.<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2NDNDNDNDNDNDTR0795Page 4 of 4November 2020DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
TABLE 5 SURFACE WATER ANALYTICAL RESULTS - ROUND 3 Chemours Fayetteville Works, North CarolinaGeosyntec Consultants of NC P.C.Sampling ProgramSupplemental Open Channel SamplingSupplemental Open Channel SamplingSupplemental Open Channel SamplingSupplemental Open Channel SamplingSupplemental Open Channel SamplingLocation IDLoc7CLoc7CLOC20AEBFBLKField Sample ID LOC-7C-4-101820LOC-7C-4-101820-DLOC-20A-4-101820LOC-EB-102020LOC-FB-102020Sample Date10/18/202010/18/202010/18/202010/20/202010/20/2020QA/QCDuplicateEquipment BlankField BlankSample TypeCompositeCompositeCompositeGrabGrabSample Delivery Group (SDG)320-65801-1320-65801-1320-65801-1320-65801-1320-65801-1Lab Sample ID320-65801-2320-65801-3320-65801-1320-65801-4320-65801-5Table 3+ SOP (ng/L)HFPO-DA8,4008,6007,000<2<2PFMOAA6906701,600<2<2PFO2HxA1,1001,1001,200<2<2PFO3OA460470240<2<2PFO4DA370370210<2<2PFO5DA290290130<2<2PMPA<6206601,700<20<20PEPA520540760<10<10PS Acid5,4005,300920<2<2Hydro-PS Acid970950220<2<2R-PSDA1700 J1900 J360 J<2<2Hydrolyzed PSDA5200 J5600 J960 J<2<2R-PSDCA11011016<2<2NVHOS49051076<2<2EVE Acid1,9001,900270<2<2Hydro-EVE Acid47048072<2<2R-EVE680 J720 J170 J<2<2PES58554.7<2<2PFECA B<27<13<2.7<2<2PFECA-G<48<24<4.8<2<2Total Table 3+ (17 Compounds) 21,00022,00014,000NDNDTotal Table 3+ (20 Compounds)21,00022,00014,000NDNDNotes:Bold - Analyte detected above associated reporting limitEPA - Environmental Protection AgencyND - no Table 3+ analytes were detected above the associated reporting limitsng/L - nanograms per literQA/QC - Quality assurance/ quality controlSDG - Sample Delivery GroupSOP - standard operating procedure< - Analyte not detected above associated reporting limit.TR0795Page 1 of 1November 2020DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
TABLE 6GROUNDWATER ANALYTICAL RESULTS - ROUND 3 Chemours Fayetteville Works, North CarolinaGeosyntec Consultants of NC P.C.Sampling Program Open Channel Sampling Open Channel Sampling Open Channel Sampling Open Channel Sampling Open Channel Sampling Open Channel Sampling Open Channel SamplingLocation ID PZ 36PZ 37PZ 39PZ 40PZ 42Field Sample IDPZ_36_102120PZ_37_102120PZ_39_102120PZ_40_102120PZ_41_102120 PZ_41_102120_D PZ_42_102120Sample Date10/21/202010/21/202010/21/202010/21/202010/21/202010/21/202010/21/2020QA/QCField DuplicateSample TypeGrab Grab Grab Grab Grab Grab Grab Sample Delivery Group (SDG)--------------Lab Sample ID--------------Table 3+ SOP (ng/L)HFPO-DA410680100300120< 100250PFMOAA9,30013,0001601,200< 100< 100< 100PFO2HxA2,0003,200200640180160280PFO3OA500880< 100100< 100< 100< 100PFO4DA<100240< 100< 100< 100< 100< 100PFO5DoA<100170< 100170< 100< 100< 100PMPA330840250500200180440PEPA<500< 500< 500< 500< 500< 500< 500PS Acid<100< 100< 100< 100< 100< 100< 100Hydro-PS Acid<100250< 100< 100< 100< 100< 100R-PSDA150 J230 J< 100170 J100 J110 J130 JHydrolyzed PSDA130 J320 J< 100< 100< 100< 100< 100R-PSDCA< 100< 100< 100< 100< 100< 100< 100NVHOS< 500< 500< 500< 500< 500< 500< 500EVE< 100< 100< 100< 100< 100< 100< 100Hydro-EVE< 100< 100< 100< 100< 100< 100< 100R-EVE< 100< 100< 100< 100< 100< 100< 100PES< 100< 100< 100< 100< 100< 100< 100PFECA_B< 100< 100< 100< 100< 100< 100< 100PFECA_G< 100< 100< 100< 100< 100< 100< 100Total Table 3+ (17 Compounds)13,00019,0007102,900500340970Total Table 3+ (20 Compounds)13,00019,0007102,900500340970PZ 41TR0795Page 1 of 2November 2020DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
TABLE 6GROUNDWATER ANALYTICAL RESULTS - ROUND 3 Chemours Fayetteville Works, North CarolinaGeosyntec Consultants of NC P.C.Sampling ProgramLocation IDField Sample IDSample DateQA/QCSample TypeSample Delivery Group (SDG)Lab Sample IDTable 3+ SOP (ng/L)HFPO-DAPFMOAAPFO2HxAPFO3OAPFO4DAPFO5DoAPMPAPEPAPS AcidHydro-PS AcidR-PSDAHydrolyzed PSDAR-PSDCANVHOSEVEHydro-EVER-EVEPESPFECA_BPFECA_GTotal Table 3+ (17 Compounds)Total Table 3+ (20 Compounds)Open Channel Sampling Open Channel Sampling Open Channel Sampling Open Channel SamplingPZ 44PZ 45EQBLKFBLKPZ_44_102120PZ_45_102120EB_PP_102120FB_10212010/21/202010/21/202010/21/202010/21/2020Equipment BlankField BlankGrab Grab Grab Grab ----------------6,0007,500< 100< 100Notes:500650< 100< 100Bold - Analyte detected above associated reporting limit1,6001,200< 100< 100160210< 100< 100180170< 100< 100ng/L - nanograms per liter< 100< 100< 100< 100QA/QC - Quality assurance/ quality control2,5002,600< 100< 100SDG - Sample Delivery Group770810< 500< 500SOP - standard operating procedure< 100< 100< 100< 100< - Analyte not detected above associated reporting limit.120< 100 < 100 < 100250 J 270 J< 100 < 100< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100< 500 < 500 < 500 < 500< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100180 170< 100 < 100< 100 < 100 < 100 < 100< 100 < 100 < 100 < 100< 100 < 100 < 100 < 10012,000 13,000ND ND12,000 13,000ND NDData reported in this table was provided by the Chemours Onsite Laboratory.TR0795Page 2 of 2November 2020DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
TABLE 7
SEDIMENT ANALYTICAL RESULTS - ROUND 3
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC P.C.
LocID LOC1 LOC3 LOC3 LOC4 LOC5 LOC7C LOC7D
Field Sample ID SED1-101220 SED3-101220 SED3-101220-D SED4-101220 SED5-101220 SED7C-101220 SED7D-101220Sample Date 10/12/2020 10/12/2020 10/12/2020 10/12/2020 10/12/2020 10/12/2020 10/12/2020
QA/QC Duplicate
Sample Matrix Solid Solid Solid Solid Solid Solid Solid
Sample Delivery Group (SDG)320-65553-1 320-65553-1 320-65553-1 320-65553-1 320-65553-1 320-65553-1 320-65553-1Lab Sample ID 320-65553-1 320-65553-2 320-65553-3 320-65553-4 320-65553-5 320-65553-6 320-65553-10
Table 3+ SOP (µg/kg)(µg/kg)(µg/kg)(µg/kg)(µg/kg)(µg/kg)(µg/kg)
Hfpo Dimer Acid <1 <1 <1 2 <4.1 <4.1 <17
PFMOAA <1 46 J 3.6 J 14 <3.6 <3.6 <15
PFO2HxA <1 16 J 1.4 J 8 <3.4 <3.4 <14PFO3OA<1 9.1 J <1 7 <5.3 <5.3 <22
PFO4DA <1 5.3 J <1 4 <11 <11 <45
PFO5DA <1 3.2 J <1 2 <10 <10 <41
PMPA <1 <1 <1 <1 <7 <7 <28PEPA<1 <1 <1 <1 <4.4 <4.3 <18
PS Acid <1 <1 <1 <1 2,100 1,400 9,600
Hydro-PS Acid <1 4.4 J 1.1 J 6 82 41 320
R-PSDA <1 <1 <1 <1 <9.2 <9.1 <37
Hydrolyzed PSDA <2 <2 <2 4.2 J <15 <15 <62
R-PSDCA <1 <1 <1 <1 <3.9 <3.8 <16
NVHOS <1 2.2 <1 1.8 <4.6 <4.6 <19
EVE Acid <1 <1 <1 <1 <3.6 <3.6 <15
Hydro-EVE Acid <1 <1 <1 <1 <4.1 <4.1 <17
R-EVE <2 <2 <2 <2 <12 <12 <50
PES <1 <1 <1 <1 <4.1 <4.1 <17
PFECA B <1 <1 <1 <1 <6.1 <6 <24
PFECA-G <1 <1 <1 <1 <9 <8.9 <36
Total Table 3+ (17 compounds)ND 86 6 45 2,200 1,400 9,900
Total Table 3+ (20 compounds)ND 86 6 49 2,200 1,400 9,900
Other (%)
Percent Moisture 20 28 27 30 26 31 27
Percent Solids 80 72 73 70 74 70 74
TR0795 Page 1 of 2 November 2020
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
TABLE 7
SEDIMENT ANALYTICAL RESULTS - ROUND 3
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants of NC P.C.
LocID
Field Sample IDSample Date
QA/QC
Sample Matrix
Sample Delivery Group (SDG)Lab Sample ID
Table 3+ SOP
Hfpo Dimer Acid
PFMOAA
PFO2HxAPFO3OA
PFO4DA
PFO5DA
PMPAPEPA
PS Acid
Hydro-PS Acid
R-PSDAHydrolyzed PSDA
R-PSDCA
NVHOS
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)
Total Table 3+ (20 compounds)
Other (%)
Percent Moisture
Percent Solids
LOC7E LOC7F LOC20A EB FBLK
SED7E-101220 SED7F-101220 SED20A-101220 SEDEB-101220 SEDFB-10122010/12/2020 10/12/2020 10/12/2020 10/12/2020 10/12/2020
Equipment blank Field blank
Solid Solid Solid Liquid Liquid
320-65553-1 320-65553-1 320-65553-1 320-65553-1 320-65553-1320-65553-9 320-65553-8 320-65553-7 320-65553-12 320-65553-11(µg/kg)(µg/kg)(µg/kg)(ng/L)(ng/L)
<10 <8.8 <7.9 <2 <2
<9 <7.7 14 <2 <2 Notes:
<8.4 <7.2 <6.5 <2 <2 Bold - Analyte detected above associated reporting limit<13 <11 <10 <2 <2 µg/kg - micrograms per kilogram
<28 <24 <21 <2 <2 ng/L - nanograms per liter
<25 <22 <20 <2 <2 QA/QC - Quality assurance/ quality control
<17 <15 <14 <20 <20 SDG - Sample Delivery Group<11 <9.3 <8.4 <10 <10 SOP - standard operating procedure
4,400 3,200 2,500 <2 <2 < -Analyte not detected above associated reporting limit.
160 110 77 <2 <2
<23 <20 <18 <2 <2
<38 <32 <29 <2 <2
<9.6 <8.2 <7.5 <2 <2
<11 <9.8 <8.8 <2 <2
<9 <7.7 <7 <2 <2
<10 <8.8 <7.9 <2 <2
<31 <26 <24 <2 <2
<10 <8.8 <7.9 <2 <2
<15 <13 <12 <2 <2
<22 <19 <17 <2 <24,600 3,300 2,600 ND ND
4,600 3,300 2,600 ND ND
25 32 29 ----
76 68 71 ----
TR0795 Page 2 of 2 November 2020
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
TABLE 8 SURFACE WATER ANALYTICAL RESULTS - ROUND 4Chemours Fayetteville Works, North CarolinaGeosyntec Consultants of NC P.C.Sampling Program Open Channel Sampling Open Channel Sampling Open Channel Sampling Open Channel Sampling Open Channel Sampling Open Channel SamplingLocation IDLoc7C-2Loc7CLOC7ELOC7ELOC20ALoc7C-2Field Sample ID LOC-7C-2-24-110420LOC-7C-24-110420LOC-7E-24-110420LOC-7E-24-110420-DLOC-20A-24-110420LOC-7C-2-24-110520Sample Date11/4/202011/4/202011/4/202011/4/202011/4/202011/5/2020QA/QCDuplicateSample TypeCompositeCompositeCompositeCompositeCompositeCompositeSample Delivery Group (SDG)320-66421-1320-66421-1320-66421-1320-66421-1320-66421-1320-66446-1Lab Sample ID320-66421-3320-66421-2320-66421-4320-66421-5320-66421-1320-66446-3LOC-7C-2-24-110420LOC-7C-24-110420LOC-7E-24-110420 LOC-7E-24-110420-DDuplicate LOC-20A-24-110420LOC-7C-2-24-110520Table 3+ SOP (ng/L)HFPO-DA373833345432PFMOAA251921221918PFO2HxA171616151921PFO3OA4.85.84.445.96.1PFO4DA3.132.42.332.8PFO5DA<2<2<2<2<2<2PMPA322728242827PEPA<10<10<10<10<10<10PS Acid10117.27.2104.8Hydro-PS Acid5.34.84.94.864.6R-PSDA24 J21 J19 J18 J9.5 J7.2 JHydrolyzed PSDA48 J44 J38 J39 J51 J32 JR-PSDCA<2<2<2<2<2<2NVHOS24.23.33.72.8<2EVE Acid332<22.9<2Hydro-EVE Acid<2<2<2<2<2<2R-EVE8.2 J5.8 J5.1 J5.6 J4 J<2PES<2<2<2<2<2<2PFECA B<2<2<2<2<2<2PFECA-G<2<2<2<2<2<2Total Table 3+ (17 compounds)140130120120150120Total Table 3+ (20 compounds)220200180180220160TR0795Page 1 of 3November 2020DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
TABLE 8 SURFACE WATER ANALYTICAL RESULTS - ROUND 4Chemours Fayetteville Works, North CarolinaGeosyntec Consultants of NC P.C.Sampling ProgramLocation IDField Sample IDSample DateQA/QCSample TypeSample Delivery Group (SDG)Lab Sample IDTable 3+ SOP (ng/L)HFPO-DAPFMOAAPFO2HxAPFO3OAPFO4DAPFO5DAPMPAPEPAPS AcidHydro-PS AcidR-PSDAHydrolyzed PSDAR-PSDCANVHOSEVE AcidHydro-EVE AcidR-EVEPESPFECA BPFECA-GTotal Table 3+ (17 compounds)Total Table 3+ (20 compounds)Open Channel Sampling Open Channel Sampling Open Channel Sampling Open Channel Sampling Open Channel Sampling Open Channel SamplingLoc7CLOC7ELOC20ALOC20AFBLKEBLOC-7C-24-110520LOC-7E-24-110520LOC-20A-24-110520LOC-20A-24-110520-DLOC-FB-110420LOC-EB-11042011/5/202011/5/202011/5/202011/5/202011/4/202011/4/2020DuplicateField BlankEquipment BlankCompositeCompositeCompositeCompositeCompositeComposite320-66446-1320-66446-1320-66446-1320-66446-1320-66421-1320-66421-1320-66446-2320-66446-1320-66446-4320-66446-5320-66421-6320-66421-7LOC-7C-24-110520LOC-7E-24-110520LOC-20A-24-110520 LOC-20A-24-110520-DDuplicate LOC-FB-110420Field Blank LOC-EB-110420Equipment Blank36344749<2<2191926 J18 J<2<228222425<2<28.76.46.87.9<2<23.93.133.4<2<22<2<2<2<2<2<20<203029<20<20<10<10<10<10<10<108.66.58.18<2<24.954.75<2<28.8 J9.1 J18 J7.2 J<2<226 J33 J35 J29 J<2<2<2<2<2<2<2<22.1<22.6<2<2<22.2<2<2<2<2<2<2<2<2<2<2<23.2 J2.2 J5.4 J<2 UJ<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<2<212096150150NDND150140210180NDNDTR0795Page 2 of 3November 2020DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
TABLE 8 SURFACE WATER ANALYTICAL RESULTS - ROUND 4Chemours Fayetteville Works, North CarolinaGeosyntec Consultants of NC P.C.Sampling ProgramLocation IDField Sample IDSample DateQA/QCSample TypeSample Delivery Group (SDG)Lab Sample IDTable 3+ SOP (ng/L)HFPO-DAPFMOAAPFO2HxAPFO3OAPFO4DAPFO5DAPMPAPEPAPS AcidHydro-PS AcidR-PSDAHydrolyzed PSDAR-PSDCANVHOSEVE AcidHydro-EVE AcidR-EVEPESPFECA BPFECA-GTotal Table 3+ (17 compounds)Total Table 3+ (20 compounds)Open Channel Sampling Open Channel SamplingFBLK EBLOC-FB-110520 LOC-EB-11052011/5/2020 11/5/2020Field Blank Equipment BlankComposite Composite320-66446-1 320-66446-1320-66446-6 320-66446-7LOC-FB-110520Field Blank LOC-EB-110520Equipment Blank<2 <2<2 <2<2 <2<2 <2Notes:<2 <2Bold - Analyte detected above associated reporting limit<2 <2 B - analyte detected in an associated blank<20 <20 J - Analyte detected. Reported value may not be accurate or precise<10<10ND - no Table 3+ analytes were detected above the associated reporting limits<2<2ng/L - nanograms per liter<2<2QA/QC - Quality assurance/ quality control<2<2SDG - Sample Delivery Group<2<2SOP - standard operating procedure<2<2UJ - Analyte not detected. Reporting limit may not be accurate or precise.<2<2< - Analyte not detected above associated reporting limit.<2<2<2<2<2<2<2<2<2<2<2<2NDNDNDNDTR0795Page 3 of 3November 2020DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
TABLE 9
OUTFALL CHANNEL NEAR DUPONT MEASURED AND CALCULATED GROUNDWATER UPWELLING RATES
Chemours Fayetteville Works, North Carolina
Geosyntec Consultants NC, P.C.
Facility Status Parameter Transect 1
(PZ-41)
Transect 2
(PZ-42)
Transect 3
(PZ-43)
Transect 4
(PZ-44)
Transect 5
(PZ-45)
Open Channel
(Combined)
Piezometer Groundwater Elevation (ft. asl.)135.2 135.4 132.7 133.4 133.2
Channel Water Elevation (ft. asl.)134.9 134.4 133.7 133.1 132.8
Distance Between Piezometer and Channel Water (ft)11.8 10.1 9.9 10.3 10.8
Head Gradient 0.03 0.09 -0.10 0.03 0.04 0.05
Estimated Upwelling Rate (gpm)11
Piezometer Groundwater Elevation (ft. asl.)134.3 133.8 131.3 132.8 133.0
Channel Water Elevation (ft. asl.)134.3 133.2 133.1 132.2 131.2
Distance Between Piezometer and Channel Water (ft)11.8 10.1 9.9 10.3 10.8
Head Gradient 0.00 0.06 -0.19 0.06 0.17 0.07
KA Parameter 231
Measured Upwelling Rate (gpm)17
Piezometer Groundwater Elevation (ft. asl.)134.6 134.4 129.4 133.0 132.8
Channel Water Elevation (ft. asl.)134.9 133.8 133.8 132.8 132.1
Distance Between Piezometer and Channel Water (ft)11.8 10.1 9.9 10.3 10.8
Head Gradient -0.02 0.05 -0.44 0.02 0.07 0.03
Estimated Upwelling Rate (gpm) 7
Notes:
1)Gradient calculations were performed using piezometers located between the open channel and the facility.
2)Positive gradients indicate upwelling conditions in the Open Channel are possible while negative gradient indicate recharge from the Open Channel is possible.
3)The combined head gradient value is an average of the head gradients at Transects 1, 2, 4, and 5.
4)Transect 3 which is not in direct hydraulic connection with the open channel was not included in this combined assessment.
5)The 17 gpm increase in flow between Locations 7C and 20A during TAR on October 18, 2020 is interpreted to originate from upwelling groundwater.
6)The groundwater upwelling rates on October 8 and November 3, 2020 were estimated using Darcy's Law where Q = iKA; where Q is the upwelling flow rate, i is the gradient
and KA is the product of hydraulic conductivity (K) and area (A). Gradients (i) were calculated for each date and KA was estimated using the measured
upwelling rates on October 18, 2020.
Abbreviations:
ft asl - feet above sea level
gpm - gallons per minute
TAR - turnaround
Nov 3, 2020
(Post-TAR)
Oct 18, 2020
(TAR)
Oct 8, 2020
(Pre-TAR)
TR0795 Page 1 of 1 November 2020
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
TABLE 10TABLE 3+ PFAS MASS DISCHARGE Chemours Fayetteville Works, North CarolinaGeosyntec Consultants of NC P.C.Sample DateLocation IDsLoc7C (Flume) Loc20A (Flume)Loc7CLoc20ALoc7CLoc20AField Sample IDs LOC-7C-4-101820LOC-20A-4-101820LOC-7C-24-110420LOC-20A-24-110420LOC-7C-24-110520LOC-20A-24-110520Flow Rates (gpm) 0.4017.05,8275,8276,3086,308Mass Discharge (µg/sec)HFPO-DA0.217.57.314206.014195.0PFMOAA0.0181.71.77.07.00.07.6102.4PFO2HxA0.0281.31.35.97.01.1119.6-1.4PFO3OA0.0120.260.252.12.20.103.52.7-0.80PFO4DA0.00940.230.221.11.10.01.61.2-0.40PFO5DA0.00740.140.13NDND0.00.80ND-0.80PMPAND1.81.89.9100.10ND1212PEPA0.0130.80.81NDND0.0NDND0.0PS Acid0.140.990.854.03.7-0.303.43.2-0.20Hydro-PS Acid0.0250.240.221.82.20.402.01.9-0.10R-PSDA0.0430.390.357.73.5-4.23.57.23.7Hydrolyzed PSDA0.131.00.8716193.010144.0R-PSDCA0.00280.0170.014NDND0.0NDND0.0NVHOS0.0120.0820.0701.51.0-0.500.841.00.16EVE Acid0.0480.290.241.11.10.00.88ND-0.88Hydro-EVE Acid0.0120.0770.065NDND0.0NDND0.0R-EVE0.0170.180.162.11.5-0.601.32.10.80PES0.00150.00500.0035NDND0.0NDND0.0PFECA BNDND0.0NDND0.0NDND0.0PFECA-GNDND0.0NDND0.0NDND0.0Total Table 3+ (17 Compounds)0.53151448557.0466115Total Table 3+ (20 Compounds)0.74171674795.061842310/18/202011/4/202011/5/2020Notes:Bold - Difference in mass discharge at upstream and downstream locations is non-zero.1 - The delta is the difference in mass discharge calculated at the downstream locations (Loc20A) and upstream locations (Loc7C). Negative values indicate higher discharge at the upstream location. Zero values indicate non-detect concentrations at both locations or the same concentrations at both locations.2-Flow rates of the date of October 18, 2020 during facility turnaround were determined using flumes for each location (7C and 20A). Flow rates for the other dates occurringafter facility turnaround were retrieved from Facility Discharge Monitoring Reports; flow rates for these dates were assumed to be equivalent at the upstream and downstreamlocations (7C and 20A).Abbreviations:gpm - gallons per minuteµg/sec - micrograms per secondDelta1Delta1Delta1TR0795Page 1 of 1November 2020DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF

TR0795 November 2020
FIGURES

DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
")
")
")
Willis Creek
Old Outfall 002Cape Fear RiverOutfall 002
W.O. Huske Dam
Site River Water Intake
NC Highway 87Seep A
Seep B
Seep C
Seep D
GBCTributary1GeorgiaBranchCreek
Site Location Map
Figure
1Raleigh
1,000 0 1,000500 Feet
³
November 2020
Notes:1. The outline of Cape Fear River is approximate and is based on open data from ArcGIS Online and North Carolina Department ofEnvironmental Quality Online GIS (MajorHydro shapefile).2. Basemap sources: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GISUser Community
Chemours Fayetteville Works, North Carolina
Legend
")Site Features
Site Boundary
Nearby Tributary
Observed Seep (Natural Drainage)
Site Conveyance Network
Areas at Site
Chemours Monomers IXM
Former DuPont PMDF Area
Wastewater Treatment Plant
Kuraray SentryGlas®Leased Area
Kuraray Trosifol®Leased Area
DuPont Polyvinyl FluorideLeased Area
Chemours PolymerProcessing Aid Area Power - Filtered andDemineralized WaterProductionKuraray Laboratory
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Transect 5
Transect 1
Transect 4
Transect 2
Transect 3
@A
@A
@A
@A
@A
@A @A
@A
@A
@A
Location 7C(Flume)
Location 20A(Flume)
#*
#*
#*
#*
#*
#*
Location 20
Location 7C(Surface Water)
Location 7D Location 7E
Location 7F
Location 20A(Surface Water)Cooling WaterChannelDuPont Area
Open Channel
to Outfall 002
PZ-36
PZ-37
PZ-38
PZ-39PZ-40
PZ-41 PZ-42
PZ-43
PZ-44
PZ-45
Surface Water and Groundwater Sampling and Monitoring Locations
Chemours Fayetteville Works, North Carolina
Figure
2Raleigh
100 0 10050 Feet
³
November 2020
Notes:Basemap sources: Esri, DigitalGlobe, GeoEye, EarthstarGeographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN,and the GIS User Community
Legend
#*Surface Water Sample Locations
Flume Locations
@A Piezometer Locations
Transect Line
Discharge Areas
Cooling Water Channel
Open Channel to Outfall
DuPont Area
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
!(!(
!(!(
!(
!(
!(
!(!(
Open Channel to Outfall 002
Waste WaterTreatment PlantDischarge
DuPont Area
Cooling Water Channel
WoodLi
nedTrenchSED1
SED3 SED4
SED5
SED7C SED7D SED7E SED7F SED20A
Sediment Sampling Locations
Chemours Fayetteville Works, North Carolina
Figure
3Raleigh
400 0 400200 Feet
³
November 2020
Legend
!( Open Channel Sediment Sampling Location
Discharge Areas
Wood Lined Trench
Cooling Water Channel
Open Channel to Outfall 002
DuPont Area
Wastewater Treatment Plant Discharge
Notes:
Locations correspond to sediment locations collected in October 2019 orsurface water locations collected in September 2020. Samples should becollected in the vicinity of these locations depending on where sediment ispresent. Coordinates for updated locations should be documented uponsample collection.
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Surface Water Results - Round 1
Chemours Fayetteville Works, North Carolina
Figure
4RaleighNovember 2020
0
50
100
150
200
250
300
Concentration (ng/L)Total Table 3+ Concentration
Location 7C Location 20
Notes:
Data shown is Table 3+ (17 compounds) concentrations
Abbreviations:
ng/L -nanograms per liter
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Surface Water Transect Results - Round 2
Chemours Fayetteville Works, North Carolina
Figure
5RaleighNovember 2020
9/24/209/16/20
0
50
100
150
200
250
300
350
400
Concentration (ng/L)0
50
100
150
200
250
300
350
400
Concentration (ng/L)HFPO-DA PFMOAA PFO2HxA PFO3OA PFO4DA
PFO5DA PMPA PEPA PS Acid Hydro-PS Acid
R-PSDCA NVHOS EVE Acid Hydro-EVE Acid PES
PFECA B PFECA-G
MidWest East MidWest East
Notes:
Data shown is Table 3+ (17 compounds) concentrations
Abbreviations:
ng/L -nanograms per liter
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Surface Water Results - Round 2
Chemours Fayetteville Works, North Carolina
Figure
6RaleighNovember 2020
0
50
100
150
200
250
300
350
400
LOC7C LOC7D LOC7E LOC7F LOC20AConcentration (ng/L)HFPO-DA PFMOAA PFO2HxA PFO3OA PFO4DA
PFO5DA PMPA PEPA PS Acid Hydro-PS Acid
R-PSDCA NVHOS EVE Acid Hydro-EVE Acid PES
PFECA B PFECA-G
Notes:
Data shown is Table 3+ (17 compounds) concentrations
Abbreviations:
ng/L -nanograms per liter
Channel Flow Direction
0
50
100
150
200
250
300
350
400
LOC7C LOC7D LOC7E LOC7F LOC20AConcentration (ng/L)9/16/20 9/24/20
Channel Flow Direction
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Surface Water Samples - Round 2 Compounds
with Increasing Concentration
Chemours Fayetteville Works, North Carolina
Figure
7RaleighNovember 2020
Notes:
September 16 2020 does not show PMPA and PFOMAA concentrations
September 24 2020 does not show PMPA and PEPA concentrations
Data shown is Table 3+ (17 compounds) concentrations
Abbreviations:
ng/L -nanograms per liter
9/16/20 9/24/20
0
20
40
60
80
100
120
140
160
180
200
LOC7C LOC7D LOC7E LOC7F LOC20AConcentration (ng/L)Channel Flow Direction
0
20
40
60
80
100
120
140
LOC7C LOC7D LOC7E LOC7F LOC20AConcentration (ng/L)HFPO-DA PFMOAA PFO2HxA PFO3OA PFO4DA
PFO5DA PS Acid Hydro-PS Acid R-PSDCA NVHOS
EVE Acid Hydro-EVE Acid PES PFECA B PFECA-G
Channel Flow Direction
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
_#*_#*_#*
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126PZ-40PZ-41Elevation (NAVD88)TAR – October 18, 2020
_#*_#*
_#*
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126PZ-40PZ-41Elevation (NAVD88)Pre-TAR – October 8, 2020
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126PZ-40PZ-41Elevation (NAVD88)Post-TAR – November 3, 2020
_#*_#*_#*
Transect 1 – PZ-40 to PZ-41
0 10 205 Feet
Water Table
_#*Lithology
Clay
Clayey Sand
Sand
Sandy Clay
Silty Sand
Chemours Fayetteville Works, North Carolina
Figure
8ARaleighNovember 2020
Notes:TAR – Plant Turnaround – October 2020
Pre-TAR measurements taken October 8, 2020
TAR measurements taken October 18, 2020
Post-TAR measurements taken November 3, 2020
Ground surface and piezometer elevations determined based on surveys by Donaldson Garret and Associates and by Freeland Clinkscales and Associates.
Legend
Ground Surface
Borehole
Well Screen
Channel Liner
Vertical Exaggeration 2X
³
Water Level
Interpreted potentiometric surfaces based on measured water levels
134.81134.90135.24 134.81134.90135.24
133.99134.26134.31
134.36134.87134.63
133.99134.26134.31
134.36134.87134.63
Transect 5
Transect 1
Transect 4
Transect 2 Transect 3PZ-41 PZ-42
PZ-44
PZ-45
PZ-36
PZ-37
PZ-38
PZ-39PZ-40
PZ-43
³
0 200 400100 Feet
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
_#*_#*
_#*
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126 PZ-39PZ-42Elevation (NAVD88)Post-TAR – November 3, 2020
_#*_#*
_#*
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126 PZ-39PZ-42Elevation (NAVD88)TAR – October 18, 2020
_#*_#*
_#*
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126 PZ-39PZ-42Elevation (NAVD88)Pre-TAR – October 8, 2020
Transect 2 – PZ-42 to PZ-39
0 10 205 Feet
Water Table
_#*Lithology
Clay
Clayey Sand
Sand
Sandy Clay
Silty Sand
Chemours Fayetteville Works, North Carolina
Figure
8BRaleighNovember 2020
Notes:TAR – Plant Turnaround – October 2020
Pre-TAR measurements taken October 8, 2020
TAR measurements taken October 18, 2020
Post-TAR measurements taken November 3, 2020
Ground surface and piezometer elevations determined based on surveys by Donaldson Garret and Associates and by Freeland Clinkscales and Associates.
Legend
Ground Surface
Borehole
Well Screen
Vertical Exaggeration 2X
³
Water Level
Interpreted potentiometric surfaces based on measured water levelsChannel Liner
Transect 5
Transect 1
Transect 4
Transect 2 Transect 3PZ-41 PZ-42
PZ-44
PZ-45
PZ-36
PZ-37
PZ-38
PZ-39PZ-40
PZ-43
³
0 200 400100 Feet
134.56134.40135.36
133.56133.17133.82
134.09133.85134.37
134.56134.40135.36
133.56133.17133.82
134.09133.85134.37
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
_#*
_#*
_#*
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126PZ-43PZ-38Elevation (NAVD88)Post-TAR – November 3, 2020
_#*
_#*
_#*
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126PZ-43PZ-38Elevation (NAVD88)TAR – October 18, 2020
_#*
_#*_#*
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126PZ-43PZ-38Elevation (NAVD88)Pre-TAR – October 8, 2020
?? Transect 3 – PZ-43 to PZ-38
0 10 205 Feet
Water Table
_#*Lithology
Clay
Clayey Sand
Sand
Sandy Clay
Silty Sand
Chemours Fayetteville Works, North Carolina
Figure
8CRaleighNovember 2020
Notes:TAR – Plant Turnaround – October 2020
Pre-TAR measurements taken October 8, 2020
TAR measurements taken October 18, 2020
Post-TAR measurements taken November 3, 2020
Ground surface and piezometer elevations determined based on surveys by Donaldson Garret and Associates and by Freeland Clinkscales and Associates.
Legend
Ground Surface
Borehole
Well Screen
Vertical Exaggeration 2X
³
Water Level
Interpreted potentiometric surfaces based on measured water levelsChannel Liner
Transect 5
Transect 1
Transect 4
Transect 2 Transect 3PZ-41 PZ-42
PZ-44
PZ-45
PZ-36
PZ-37
PZ-38
PZ-39PZ-40
PZ-43
³
0 200 400100 Feet
133.16
133.70
132.67
132.54133.13
131.26
132.54
133.75
129.37
133.16
133.70
132.67
132.54133.13
131.26
132.54
133.75
129.37
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
_#*_#*_#*
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126 PZ-37PZ-44Elevation (NAVD88)Post-TAR – November 3, 2020
_#*_#*
_#*
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126 PZ-37PZ-44Elevation (NAVD88)TAR – October 18, 2020
_#*_#*
_#*
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126 PZ-37PZ-44Elevation (NAVD88)Pre-TAR – October 8, 2020
Transect 4 – PZ-44 to PZ-37
0 10 205 Feet
Water Table
_#*Lithology
Clay
Clayey Sand
Sand
Sandy Clay
Silty Sand
Chemours Fayetteville Works, North Carolina
Figure
8DRaleighNovember 2020
Notes:TAR – Plant Turnaround – October 2020
Pre-TAR measurements taken October 8, 2020
TAR measurements taken October 18, 2020
Post-TAR measurements taken November 3, 2020
Ground surface and piezometer elevations determined based on surveys by Donaldson Garret and Associates and by Freeland Clinkscales and Associates.
Legend
Ground Surface
Borehole
Well Screen
Vertical Exaggeration 2X
³
Water Level
Interpreted potentiometric surfaces based on measured water levelsChannel Liner
Transect 5
Transect 1
Transect 4
Transect 2 Transect 3PZ-41 PZ-42
PZ-44
PZ-45
PZ-36
PZ-37
PZ-38
PZ-39PZ-40
PZ-43
³
0 200 400100 Feet
133.12133.10133.42
132.40132.21132.79
132.67132.83133.02
133.12133.10133.42
132.40132.21132.79
132.67132.83133.02
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
_#*_#*
_#*
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126 PZ-36PZ-45Post-TAR – November 3, 2020
Elevation (NAVD88)_#*_#*
_#*
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126 PZ-36PZ-45TAR – October 18, 2020
Elevation (NAVD88)_#*_#*
_#*
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126 PZ-36PZ-45Pre-TAR – October 8, 2020
Elevation (NAVD88)Transect 5
Transect 1
Transect 4
Transect 2 Transect 3PZ-41 PZ-42
PZ-44
PZ-45
PZ-36
PZ-37
PZ-38
PZ-39PZ-40
PZ-43
³
0 200 400100 Feet
Transect 5 – PZ-45 to PZ-36
0 10 205 Feet
Water Table
_#*Lithology
Clay
Clayey Sand
Sand
Sandy Clay
Silty Sand
Chemours Fayetteville Works, North Carolina
Figure
8ERaleighNovember 2020
Notes:TAR – Plant Turnaround – October 2020
Pre-TAR measurements taken October 8, 2020
TAR measurements taken October 18, 2020
Post-TAR measurements taken November 3, 2020
Ground surface and piezometer elevations determined based on surveys by Donaldson Garret and Associates and by Freeland Clinkscales and Associates.
Legend
Ground Surface
Borehole
Well Screen
Vertical Exaggeration 2X
³
Water Level
Interpreted potentiometric surfaces based on measured water levelsChannel Liner
132.76132.80133.19
132.30
131.17
133.02
132.36132.07132.82
132.76132.80133.19
132.30
131.17
133.02
132.36132.07132.82
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Piezometer Water Levels
Chemours Fayetteville Works, North Carolina
Figure
9RaleighNovember 2020
0
0.05
0.1
0.15
0.2
132
133
134
135
136
Total Precipitation (in/15 min)Groundwater Level (ft NAVD88)PZ-41
PZ-40
PZ-39
PZ-42
PZ-37
PZ-44
PZ-36
PZ-45
TAR starts
TAR ends
Precipitation
Notes:
1)Elevations are from barometrically adjusted level logger data
2)Transect 3 and PZ-25R are not included in this figure, these locations are often dry
3)Total cumulative precipitation over the monitored period is 2.08 inches
Abbreviations:
ft NAVD88 -feet North American Vertical Datum of 1988
in/15min -Inches of precipitation every 15 miuntes
TAR -Turnaround
PZ -Piezometer
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Cooling WaterChannelDuPont Area
Open Channel
to Outfall 002
Thermal Imaging Survey
Chemours Fayetteville Works, North Carolina
Figure
10Raleigh
100 0 10050 Feet
³
November 2020
Notes:1.Images shown here are instances where there was observations ofgroundwater upwelling into the open channel.2.Thermal Survey was conducted on October 17th 2020, between07:30 and 09:30.
Basemap sources: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community
Legend
Thermal Image Locations
Discharge Areas
Cooling Water Channel
Open Channel to Outfall 002
DuPont Area
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
TAR Flow Measurements
Chemours Fayetteville Works, North Carolina
Figure
11RaleighNovember 2020
Notes:
1)Average delta between location 20A & 7C is 16.9 GPM (no time offset applied).
2) Total precipitation over the period shown is a cumulative 0.03 inches.
3) All precipitation occured on November 16th 2020.
Abbreviations:
TAR -Turnaround
in/15min -Inches of precipitation every 15 minutes
gpm -Gallon per minute
0.000
0.002
0.003
0.005
0.007
0.009
0.010
0.012
0
10
20
30
40
50
60
70
Precipitation (in/15min)Flow (gpm)Location 7C Location 20A Precipitation
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Surface Water Results - Round 4
Chemours Fayetteville Works, North Carolina
Figure
12RaleighNovember 2020
0
20
40
60
80
100
120
140
160
Concentration (ng/L)PFECA-G PFECA B PES Hydro-EVE Acid EVE Acid
NVHOS R-PSDCA Hydro-PS Acid PS Acid PEPA
PMPA PFO5DA PFO4DA PFO3OA PFO2HxA
PFMOAA HFPO-DA
Channel Flow Direction
0
20
40
60
80
100
120
140
160
LOC7C-2 LOC7C LOC7E LOC20AConcentration (ng/L)Channel Flow Direction
Notes:
Data shown is Table 3+ (17 compounds) concentrations
Abbreviations:
ng/L -nanograms per liter
LOC7C-2 LOC7C LOC7E LOC20A
11/3/20 11/4/20
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Mass Discharge Increases
Chemours Fayetteville Works, North Carolina
Figure
13RaleighNovember 2020
-10
-5
0
5
10
15
20
25
30
October 18, 2020 November 4, 2020 November 5, 2020Mass Discharge (μg/sec)Mass Discharge Changes Between Locations 7C and 20/20A
(Upstream to Downstream)
PFECA-G
PFECA B
PES
Hydro-EVE Acid
EVE Acid
NVHOS
R-PSDCA
Hydro-PS Acid
PS Acid
PEPA
PMPA
PFO5DA
PFO4DA
PFO3OA
PFO2HxA
PFMOAA
HFPO-DA
Notes:
1)Data shown is Table 3+ (17 compounds) data
2)Mass discharges are shown for dates listed below that are interpreted to represent groundwater
upwelling mass discharge increases:
-October 18, 2020 - during TAR
-November 4, 2020 - after TAR
-November 5, 2020 - after TAR
Abbreviations:
μg/sec -micrograms per second
TAR -Turnaround
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Mass Discharge Comparison (Linear Scale)
Chemours Fayetteville Works, North Carolina
Figure
14RaleighNovember 2020
0
5,000
10,000
15,000
October 18, November 4,
2020
November 5,
2020
CFR-TARHEEL -
Q1 2020
CFR-TARHEEL -
Q2 2020Mass Discharge (μg/sec)Total Table 3+ (17 Compounds)
Notes:
1) Data shown is Table 3+ (17 compounds) data
2) October 18, 2020 (during TAR) = 14 μg/sec
3) November 4, 2020 (after TAR) = 7 μg/sec
4) November 5, 2020 (after TAR) = 15 μg/sec
5) CFR-TARHEEL results come from the Cape Fear River time integrated composite sample
collected at the Tar Heel Ferry Road Bridge approximately seven river miles downstream of the
Site.
Abbreviations:
μg/sec -micrograms per second
TAR -Turnaround
2020
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Mass Discharge Comparison (Log Scale)
Chemours Fayetteville Works, North Carolina
Figure
15RaleighNovember 2020
1
10
100
1,000
10,000
100,000
November 5,
2020
CFR-TARHEEL -
Q1 2020
CFR-TARHEEL -
Q2 2020Mass Discharge (μg/sec)Total Table 3+ (17 Compounds)
Notes:
1) Data shown is Table 3+ (17 compounds) data
2) October 18, 2020 (during TAR) = 14 μg/sec
3) November 4, 2020 (after TAR) = 7 μg/sec
4) November 5, 2020 (after TAR) = 15 μg/sec
5) CFR-TARHEEL results come from the Cape Fear River time integrated composite sample
collected at the Tar Heel Ferry Road Bridge approximately seven river miles downstream of the
Site.
Abbreviations:
μg/sec -micrograms per second
TAR -Turnaround
October 18, November 4,
2020 2020
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF

TR0795 November 2020

APPENDIX A
Laboratory Reports and DVM Workbooks

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

DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
ADQM Data Review Narrative 1 of 3
ADQM DATA REVIEW
NARRATIVE
Site Chemours FAY – Fayetteville
Project Open Channel Sampling
Project Reviewer Michael Aucoin, AECOM as a Chemours contractor
Sampling Dates July 16 - 17, 2020
July 23, 2020
July 27 - 28, 2020
July 31, 2020
Analytical Protocol
Laboratory Analytical Method Parameter(s)
TestAmerica - Sacramento Cl. Spec. Table 3
Compound SOP
Table 3+ compounds incl HFPO-DA
Sample Receipt
The following items are noted for this data set:
•All samples were received in satisfactory condition and within EPA temperature guidelines on:
July 21, 2020
July 24, 2020
July 31, 2020
August 6, 2020
Data Review
The electronic data submitted for this project was reviewed via the Data Verification Module (DVM)
process.
Overall the data is acceptable for use without qualification, except as noted below:
•Due to uncertainty from observed matrix effects during the analysis of R-PSDA, Hydrolyzed
PSDA and R-EVE, a J-qualifier has been added to all positive results in the data set, if not already
qualified by the DVM and even if there was no matrix spike analyzed for that particular sample,
and the results should be considered to be estimated values.
•Some analytical results have been qualified J as estimated, due to poor recovery of a matrix spike,
or poor field duplicate or lab replicate precision. See the Data Verification Module (DVM)
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
ADQM Data Review Narrative 2 of 3
Narrative Report for which samples were qualified, the specific reasons for qualification, and
potential bias in reported results.
Attachments
The DVM Narrative report is attached. The lab reports due to a large page count are stored on an
AECOM network shared drive and are available to be posted on external shared drives, or on a flash
drive.
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
ADQM Data Review Narrative 3 of 3
Data Verification Module (DVM)
The DVM is an internal review process used by the ADQM group to assist with the determination of data
usability. The electronic data deliverables received from the laboratory are loaded into the Locus EIM™
database and processed through a series of data quality checks, which are a combination of software
(Locus EIM™ database Data Verification Module (DVM)) and manual reviewer evaluations. The data is
evaluated against the following data usability checks:
•Field and laboratory blank contamination
•US EPA hold time criteria
•Missing Quality Control (QC) samples
•Matrix spike(MS)/matrix spike duplicate (MSD) recoveries and the relative percent differences
(RPDs) between these spikes
•Laboratory control sample(LCS)/control sample duplicate (LCSD) recoveries and the RPD
between these spikes
•Surrogate spike recoveries for organic analyses
•RPD between field duplicate sample pairs
•RPD between laboratory replicates for inorganic analyses
•Difference / percent difference between total and dissolved sample pairs.
There are two qualifier fields in EIM:
Lab Qualifier is the qualifier assigned by the lab and may not reflect the usability of the data. This
qualifier may have many different meanings and can vary between labs and over time within the same
lab. Please refer to the laboratory report for a description of the lab qualifiers. As they are lab
descriptors they are not to be used when evaluating the data.
Validation Qualifier is the 3rd party formal validation qualifier if this was performed. Otherwise this
field contains the qualifier resulting from the ADQM DVM review process. This qualifier assesses
the usability of the data and may not equal the lab qualifier. The DVM applies the following data
evaluation qualifiers to analysis results, as warranted:
Qualifier Definition
B Not detected substantially above the level reported in the laboratory
or field blanks.
R Unusable result. Analyte may or may not be present in the sample.
J Analyte present. Reported value may not be accurate or precise.
UJ Not detected. Reporting limit may not be accurate or precise.
The Validation Status Code field is set to “DVM” if the ADQM DVM process has been performed. If the DVM
has not been run, the field will be blank.
If the DVM has been run (Validation Status Code equals “DVM”), use the Validation Qualifier.
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
DVM Narrative ReportAssociated MS and/or MSD analysis had relative percent recovery (RPR) values higher than the upper control limit. The reported result may be biasedhigh.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Open Channel SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResult TypeField Sample IDPrepUnitsLOC-20-24-071620 07/16/2020 320-62878-3R-PSDA0.041 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20-24-071620 07/16/2020 320-62878-3R-PSDA0.036 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20-24-071620 07/16/2020 320-62878-3Hydrolyzed PSDA0.14 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20-24-071620 07/16/2020 320-62878-3Hydrolyzed PSDA0.13 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20-24-071620 07/16/2020 320-62878-3R-EVE0.010 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20-24-071620 07/16/2020 320-62878-3R-EVE0.0098 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7C-24-071620 07/16/2020 320-62878-1R-PSDA0.028 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7C-24-071620 07/16/2020 320-62878-1R-PSDA0.029 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7C-24-071620 07/16/2020 320-62878-1Hydrolyzed PSDA0.098 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7C-24-071620 07/16/2020 320-62878-1Hydrolyzed PSDA0.099 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7C-24-071620 07/16/2020 320-62878-1R-EVE0.0059 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7C-24-071620 07/16/2020 320-62878-1R-EVE0.0061 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLPage 1 of 3DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
High relative percent difference (RPD) observed between field duplicate and parent sample. The reported result may be imprecise.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Open Channel SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsLOC-7C-24-07162007/16/2020320-62878-1NVHOS0.0085UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7C-24-07162007/16/2020320-62878-1NVHOS0.0089UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7C-24-071620-D07/16/2020320-62878-2NVHOS0.0046UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLPage 2 of 3DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Quality review criteria exceeded between the REP (laboratory replicate) and parent sample. The reported result may be imprecise.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Open Channel SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsLOC-20-24-07162007/16/2020320-62878-3PFO3OA0.0054ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20-24-07162007/16/2020320-62878-3PFO3OA0.0043ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLPage 3 of 3DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
ADQM Data Review Narrative 1 of 3
ADQM DATA REVIEW
NARRATIVE
Site Chemours FAY – Fayetteville
Project Supplemental Open Channel Sampling
Project Reviewer Michael Aucoin, AECOM as a Chemours contractor
Sampling Dates September 15 - 16, 2020
September 24, 2020
October 12, 2020
October 18, 2020
November 4 - 5, 2020
Analytical Protocol
Laboratory Analytical Method Parameter(s)
TestAmerica - Sacramento Cl. Spec. Table 3
Compound SOP
Table 3+ compounds incl HFPO-DA
TestAmerica - Denver 9060A TOC
TestAmerica - Denver SM 2540 D TSS
Alpha Analytical 9060A TOC
Alpha Analytical SM 2540 D TSS
Sample Receipt
The following items are noted for this data set:
•All samples were received in satisfactory condition and within EPA temperature guidelines on:
September 18, 2020
September 26, 2020
September 30, 2020
October 13, 2020
October 21, 2020
November 5 - 6, 2020
Data Review
The electronic data submitted for this project was reviewed via the Data Verification Module (DVM)
process.
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
ADQM Data Review Narrative 2 of 3
Overall the data is acceptable for use without qualification, except as noted below:
•Some TOC results were qualified B and the reported results may be biased high, or false
positives, due to a comparable concentration found in an associated equipment or field blank.
•Due to uncertainty from observed matrix effects during the analysis of R-PSDA, Hydrolyzed
PSDA and R-EVE, a J-qualifier has been added to all positive results in the data set, if not already
qualified by the DVM and even if there was no matrix spike analyzed for that particular sample,
and the results should be considered to be estimated values.
•Some analytical results have been qualified J as estimated, and non-detect results qualified UJ
indicating an estimated reporting limit, due to poor recovery of a matrix spike or lab control
spike, or poor field duplicate or lab replicate precision. See the Data Verification Module (DVM)
Narrative Report for which samples were qualified, the specific reasons for qualification, and
potential bias in reported results.
•TOC and TSS results were reported by the laboratory to the method detection limit (MDL);
results reported between the MDL and the limit of quantitation (LOQ) are qualified J and should
be considered to be estimated values.
Attachments
The DVM Narrative report is attached. The lab reports due to a large page count are stored on an
AECOM network shared drive and are available to be posted on external shared drives, or on a flash
drive.
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
ADQM Data Review Narrative 3 of 3
Data Verification Module (DVM)
The DVM is an internal review process used by the ADQM group to assist with the determination of data
usability. The electronic data deliverables received from the laboratory are loaded into the Locus EIM™
database and processed through a series of data quality checks, which are a combination of software
(Locus EIM™ database Data Verification Module (DVM)) and manual reviewer evaluations. The data is
evaluated against the following data usability checks:
•Field and laboratory blank contamination
•US EPA hold time criteria
•Missing Quality Control (QC) samples
•Matrix spike(MS)/matrix spike duplicate (MSD) recoveries and the relative percent differences
(RPDs) between these spikes
•Laboratory control sample(LCS)/control sample duplicate (LCSD) recoveries and the RPD
between these spikes
•Surrogate spike recoveries for organic analyses
•RPD between field duplicate sample pairs
•RPD between laboratory replicates for inorganic analyses
•Difference / percent difference between total and dissolved sample pairs.
There are two qualifier fields in EIM:
Lab Qualifier is the qualifier assigned by the lab and may not reflect the usability of the data. This
qualifier may have many different meanings and can vary between labs and over time within the same
lab. Please refer to the laboratory report for a description of the lab qualifiers. As they are lab
descriptors they are not to be used when evaluating the data.
Validation Qualifier is the 3rd party formal validation qualifier if this was performed. Otherwise this
field contains the qualifier resulting from the ADQM DVM review process. This qualifier assesses
the usability of the data and may not equal the lab qualifier. The DVM applies the following data
evaluation qualifiers to analysis results, as warranted:
Qualifier Definition
B Not detected substantially above the level reported in the laboratory
or field blanks.
R Unusable result. Analyte may or may not be present in the sample.
J Analyte present. Reported value may not be accurate or precise.
UJ Not detected. Reporting limit may not be accurate or precise.
The Validation Status Code field is set to “DVM” if the ADQM DVM process has been performed. If the DVM
has not been run, the field will be blank.
If the DVM has been run (Validation Status Code equals “DVM”), use the Validation Qualifier.
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
DVM Narrative ReportContamination detected in equipment blank(s). Sample result does not differ significantly from the analyte concentration detected in the associatedequipment blank(s).LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Supplemental Open Channel SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResult TypeField Sample IDPrepUnitsLOC-SEEP-A-1-091620 09/16/2020 280-140581-4 Carbon1.5 MG/L0.359060AB1.0MDLLOC-SEEP-A-1-24-091520 09/15/2020 280-140581-3 Carbon1.5 MG/L0.359060AB1.0MDLLOC-SEEP-B-1-091620-D 09/16/2020 280-140581-7 Carbon1.8 MG/L0.359060AB1.0MDLLOC-SEEP-B-1-24-091520 09/15/2020 280-140581-5 Carbon1.7 MG/L0.359060AB1.0MDLLOC-SEEP-B-1-24-091520-D09/15/2020 280-140581-8 Carbon1.9 MG/L0.359060AB1.0MDLPage 1 of 20DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Contamination detected in Field Blank(s). Sample result does not differ significantly from the analyte concentration detected in the associated fieldblank(s).LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Supplemental Open Channel SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsLOC-SEEP-B-1-09162009/16/2020280-140581-6Carbon2.4MG/L0.359060AB1.0MDLPage 2 of 20DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
High relative percent difference (RPD) observed between field duplicate and parent sample. The reported result may be imprecise.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Supplemental Open Channel SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsSEEP-B-1-SPLIT-A-091620-D-Z09/16/2020320-64813-11PFO5DA0.078ug/LCl. Spec. Table 3Compound SOPUJPFAS_DI_Prep0.078PQLSEEP-B-1-SPLIT-B-091620-D-Z09/16/2020320-64813-12PES0.0067UG/LCl. Spec. Table 3Compound SOPUJPFAS_DI_Prep0.0067PQLCFR-TARHEEL-SPLIT-A-092420-D-Z09/24/2020320-65180-11R-EVE0.0020UG/LCl. Spec. Table 3Compound SOPUJPFAS_DI_Prep0.0020PQLLOC-20A-24-110520-D11/05/2020320-66446-5R-EVE0.0020UG/LCl. Spec. Table 3Compound SOPUJPFAS_DI_Prep0.0020PQLLOC-SEEP-B-1-SPLIT-A-09162009/16/2020320-64813-5PES0.0067UG/LCl. Spec. Table 3Compound SOPUJPFAS_DI_Prep0.0067PQLPage 3 of 20DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Associated MS and/or MSD analysis had relative percent recovery (RPR) values less than the lower control limit. The actual detection limits may behigher than reported.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Supplemental Open Channel SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsLOC-SEEP-B-1-24-SPLIT-A-09152009/15/2020320-64813-1PFECA-G0.048UG/LCl. Spec. Table 3Compound SOPUJPFAS_DI_Prep0.048PQLLOC-SEEP-B-1-24-SPLIT-A-09152009/15/2020320-64813-1PFECA-G0.048UG/LCl. Spec. Table 3Compound SOPUJPFAS_DI_Prep0.048PQLSEEP-B-1-24-SPLIT-B-091520-Z09/15/2020320-64813-4PFECA-G0.048UG/LCl. Spec. Table 3Compound SOPUJPFAS_DI_Prep0.048PQLSEEP-B-1-24-SPLIT-B-091520-Z09/15/2020320-64813-4PFECA-G0.048UG/LCl. Spec. Table 3Compound SOPUJPFAS_DI_Prep0.048PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3R-PSDCA0.017UG/LCl. Spec. Table 3Compound SOPUJPFAS_DI_Prep0.017PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3R-PSDCA0.017UG/LCl. Spec. Table 3Compound SOPUJPFAS_DI_Prep0.017PQLSEEP-A-1-24-SPLIT-B-091520-Z09/15/2020320-64780-4R-PSDCA0.017UG/LCl. Spec. Table 3Compound SOPUJPFAS_DI_Prep0.017PQLSEEP-A-1-24-SPLIT-B-091520-Z09/15/2020320-64780-4R-PSDCA0.017UG/LCl. Spec. Table 3Compound SOPUJPFAS_DI_Prep0.017PQLLOC-20A-24-SPLIT-A-091620-Z09/16/2020320-64782-3PFMOAA0.0020ug/LCl. Spec. Table 3Compound SOPUJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-A-091620-Z09/16/2020320-64782-3PFMOAA0.0020ug/LCl. Spec. Table 3Compound SOPUJPFAS_DI_Prep0.0020PQLLOC-20A-21-SPLIT-A-09162009/16/2020320-64782-1PFMOAA0.0020ug/LCl. Spec. Table 3Compound SOPUJPFAS_DI_Prep0.0020PQLLOC-20A-21-SPLIT-A-09162009/16/2020320-64782-1PFMOAA0.0020ug/LCl. Spec. Table 3Compound SOPUJPFAS_DI_Prep0.0020PQLPage 4 of 20DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Associated LCS and/or LCSD analysis had relative percent recovery (RPR) values higher than the upper control limit. The reported result may bebiased high.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Supplemental Open Channel SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsLOC-7C-EAST-24-09242009/24/2020L2040786-02Total SuspendedSolids9.9MG/L5.02540 D-1997J5.0MDLLOC-7C-WEST-24-09242009/24/2020L2040786-01Total SuspendedSolids5.2MG/L5.02540 D-1997J5.0MDLLOC-7D-24-09242009/24/2020L2040786-03Total SuspendedSolids8.4MG/L5.02540 D-1997J5.0MDLLOC-7E-24-09242009/24/2020L2040786-04Total SuspendedSolids6.5MG/L5.02540 D-1997J5.0MDLLOC-7F-24-09242009/24/2020L2040786-05Total SuspendedSolids5.1MG/L5.02540 D-1997J5.0MDLPage 5 of 20DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Associated MS and/or MSD analysis had relative percent recovery (RPR) values higher than the upper control limit. The reported result may be biasedhigh.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Supplemental Open Channel SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3NVHOS1.2UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.015PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3NVHOS1.2UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.015PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3PMPA22UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.62PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3PMPA23UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.62PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3Hfpo Dimer Acid30UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.081PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3R-PSDA2.5UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3R-PSDA2.5UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3Hydrolyzed PSDA40UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3Hydrolyzed PSDA40UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLLOC-20A-24-SPLIT-A-091620-Z09/16/2020320-64782-3R-PSDA0.070UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-A-091620-Z09/16/2020320-64782-3R-PSDA0.075UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-A-091620-Z09/16/2020320-64782-3Hydrolyzed PSDA0.092UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-A-091620-Z09/16/2020320-64782-3Hydrolyzed PSDA0.10UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-A-091620-Z09/16/2020320-64782-3R-EVE0.050UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-A-091620-Z09/16/2020320-64782-3R-EVE0.051UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-21-SPLIT-B-09162009/16/2020320-64782-2R-PSDA0.077UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLPage 6 of 20DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Associated MS and/or MSD analysis had relative percent recovery (RPR) values higher than the upper control limit. The reported result may be biasedhigh.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Supplemental Open Channel SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsLOC-20A-21-SPLIT-B-09162009/16/2020320-64782-2R-PSDA0.079UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-21-SPLIT-B-09162009/16/2020320-64782-2Hydrolyzed PSDA0.074UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-21-SPLIT-B-09162009/16/2020320-64782-2Hydrolyzed PSDA0.079UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-21-SPLIT-B-09162009/16/2020320-64782-2R-EVE0.054UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-21-SPLIT-B-09162009/16/2020320-64782-2R-EVE0.057UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-11052011/05/2020320-66446-4R-PSDA0.018UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-11052011/05/2020320-66446-4R-EVE0.0054UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-21-SPLIT-A-09162009/16/2020320-64782-1R-PSDA0.077UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-21-SPLIT-A-09162009/16/2020320-64782-1R-PSDA0.071UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-21-SPLIT-A-09162009/16/2020320-64782-1Hydrolyzed PSDA0.096UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-21-SPLIT-A-09162009/16/2020320-64782-1Hydrolyzed PSDA0.089UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-21-SPLIT-A-09162009/16/2020320-64782-1R-EVE0.052UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-21-SPLIT-A-09162009/16/2020320-64782-1R-EVE0.048UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-A-09242009/24/2020320-65177-1R-PSDA0.056UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-A-09242009/24/2020320-65177-1R-PSDA0.053UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-A-09242009/24/2020320-65177-1Hydrolyzed PSDA0.058UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-A-09242009/24/2020320-65177-1Hydrolyzed PSDA0.055UG/LCl. Spec. Table 3CompoundJPFAS_DI_Prep0.0020PQLPage 7 of 20DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Associated MS and/or MSD analysis had relative percent recovery (RPR) values higher than the upper control limit. The reported result may be biasedhigh.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Supplemental Open Channel SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsSOPLOC-20A-24-SPLIT-A-09242009/24/2020320-65177-1R-EVE0.0071UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-A-09242009/24/2020320-65177-1R-EVE0.0065UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-A-092420-Z09/24/2020320-65177-3R-PSDA0.060UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-A-092420-Z09/24/2020320-65177-3R-PSDA0.062UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-A-092420-Z09/24/2020320-65177-3Hydrolyzed PSDA0.060UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-A-092420-Z09/24/2020320-65177-3Hydrolyzed PSDA0.063UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-A-092420-Z09/24/2020320-65177-3R-EVE0.0090UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-A-092420-Z09/24/2020320-65177-3R-EVE0.0092UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-B-091620-Z09/16/2020320-64782-4R-PSDA0.080UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-B-091620-Z09/16/2020320-64782-4R-PSDA0.083UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-B-091620-Z09/16/2020320-64782-4Hydrolyzed PSDA0.083UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-B-091620-Z09/16/2020320-64782-4Hydrolyzed PSDA0.085UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-B-091620-Z09/16/2020320-64782-4R-EVE0.060UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-B-091620-Z09/16/2020320-64782-4R-EVE0.063UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-B-09242009/24/2020320-65177-2R-PSDA0.026UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-B-09242009/24/2020320-65177-2R-PSDA0.029UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLPage 8 of 20DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Associated MS and/or MSD analysis had relative percent recovery (RPR) values higher than the upper control limit. The reported result may be biasedhigh.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Supplemental Open Channel SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsLOC-20A-24-SPLIT-B-09242009/24/2020320-65177-2Hydrolyzed PSDA0.052UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-B-09242009/24/2020320-65177-2Hydrolyzed PSDA0.052UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-B-09242009/24/2020320-65177-2R-EVE0.0069UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-B-09242009/24/2020320-65177-2R-EVE0.0063UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-B-092420-Z09/24/2020320-65177-4R-PSDA0.031UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-B-092420-Z09/24/2020320-65177-4R-PSDA0.032UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-B-092420-Z09/24/2020320-65177-4Hydrolyzed PSDA0.048UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-B-092420-Z09/24/2020320-65177-4Hydrolyzed PSDA0.048UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-B-092420-Z09/24/2020320-65177-4R-EVE0.0068UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-B-092420-Z09/24/2020320-65177-4R-EVE0.0070UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7C-MID-24-SPLIT-A-09162009/16/2020320-64771-1R-PSDA0.032UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7C-MID-24-SPLIT-A-09162009/16/2020320-64771-1R-PSDA0.029UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7C-MID-24-SPLIT-A-09162009/16/2020320-64771-1Hydrolyzed PSDA0.082UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7C-MID-24-SPLIT-A-09162009/16/2020320-64771-1Hydrolyzed PSDA0.075UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7C-MID-24-SPLIT-A-09162009/16/2020320-64771-1R-EVE0.029UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7C-MID-24-SPLIT-A-09162009/16/2020320-64771-1R-EVE0.027UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7C-MID-24-SPLIT-A-09242009/24/2020320-65175-1R-PSDA0.022UG/LCl. Spec. Table 3CompoundJPFAS_DI_Prep0.0020PQLPage 9 of 20DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Associated MS and/or MSD analysis had relative percent recovery (RPR) values higher than the upper control limit. The reported result may be biasedhigh.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Supplemental Open Channel SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsSOPLOC-7C-MID-24-SPLIT-A-09242009/24/2020320-65175-1R-PSDA0.025UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7C-MID-24-SPLIT-A-09242009/24/2020320-65175-1Hydrolyzed PSDA0.049UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7C-MID-24-SPLIT-A-09242009/24/2020320-65175-1Hydrolyzed PSDA0.050UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7C-MID-24-SPLIT-A-09242009/24/2020320-65175-1R-EVE0.0068UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7C-MID-24-SPLIT-A-09242009/24/2020320-65175-1R-EVE0.0069UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7E-24-11042011/04/2020320-66421-4R-PSDA0.019UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7E-24-11042011/04/2020320-66421-4R-PSDA0.019UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7E-24-11042011/04/2020320-66421-4R-EVE0.0051UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7E-24-11042011/04/2020320-66421-4R-EVE0.0050UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSEEP-B-1-24-SPLIT-A-091520-Z09/15/2020320-64813-3NVHOS1.8UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.015PQLSEEP-B-1-24-SPLIT-A-091520-Z09/15/2020320-64813-3NVHOS1.8UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.015PQLSEEP-B-1-24-SPLIT-A-091520-Z09/15/2020320-64813-3PMPA34UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.62PQLSEEP-B-1-24-SPLIT-A-091520-Z09/15/2020320-64813-3PMPA34UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.62PQLSEEP-B-1-24-SPLIT-A-091520-Z09/15/2020320-64813-3Hfpo Dimer Acid28UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.081PQLSEEP-B-1-24-SPLIT-A-091520-Z09/15/2020320-64813-3R-PSDA2.5UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-B-1-24-SPLIT-A-091520-Z09/15/2020320-64813-3R-PSDA2.4UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLPage 10 of 20DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Associated MS and/or MSD analysis had relative percent recovery (RPR) values higher than the upper control limit. The reported result may be biasedhigh.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Supplemental Open Channel SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsSEEP-B-1-24-SPLIT-A-091520-Z09/15/2020320-64813-3Hydrolyzed PSDA37UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-B-1-24-SPLIT-A-091520-Z09/15/2020320-64813-3Hydrolyzed PSDA37UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-B-1-24-SPLIT-A-091520-Z09/15/2020320-64813-3R-EVE2.6UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-B-1-24-SPLIT-A-091520-Z09/15/2020320-64813-3R-EVE2.7UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-B-1-24-SPLIT-A-091520-Z09/15/2020320-64813-3PEPA13UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.016PQLSEEP-B-1-24-SPLIT-A-091520-Z09/15/2020320-64813-3PEPA13UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.016PQLSEEP-B-1-24-SPLIT-A-091520-Z09/15/2020320-64813-3PFO2HxA40ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.027PQLSEEP-B-1-24-SPLIT-A-091520-Z09/15/2020320-64813-3PFO2HxA39ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.027PQLSEEP-B-1-24-SPLIT-A-091520-Z09/15/2020320-64813-3PFO3OA7.7ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.039PQLSEEP-B-1-24-SPLIT-A-091520-Z09/15/2020320-64813-3PFO3OA7.1ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.039PQLSEEP-B-1-24-SPLIT-A-091520-Z09/15/2020320-64813-3PFO4DA0.79ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.059PQLSEEP-B-1-24-SPLIT-A-091520-Z09/15/2020320-64813-3PFO4DA0.74ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.059PQLSEEP-B-1-24-SPLIT-A-091520-Z09/15/2020320-64813-3PFMOAA150ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.080PQLSEEP-B-1-24-SPLIT-A-091520-Z09/15/2020320-64813-3PFMOAA150ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.080PQLSEEP-B-1-24-SPLIT-A-091520-Z09/15/2020320-64813-3Hydro-EVE Acid0.85UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.014PQLSEEP-B-1-24-SPLIT-A-091520-Z09/15/2020320-64813-3Hydro-EVE Acid0.81UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.014PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3R-EVE1.4UG/LCl. Spec. Table 3CompoundJPFAS_DI_Prep0.072PQLPage 11 of 20DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Associated MS and/or MSD analysis had relative percent recovery (RPR) values higher than the upper control limit. The reported result may be biasedhigh.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Supplemental Open Channel SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsSOPSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3R-EVE1.4UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3PEPA7.9UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.016PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3PEPA8.1UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.016PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3PS Acid0.024UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.020PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3PS Acid0.024UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.020PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3PFO2HxA42ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.027PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3PFO2HxA44ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.027PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3PFO3OA13ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.039PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3PFO3OA13ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.039PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3PFO4DA5.4ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.059PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3PFO4DA5.7ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.059PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3PFO5DA0.25ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.078PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3PFO5DA0.26ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.078PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3PFMOAA100ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.080PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3PFMOAA110ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.080PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3Hydro-PS Acid0.011ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0061PQLPage 12 of 20DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Associated MS and/or MSD analysis had relative percent recovery (RPR) values higher than the upper control limit. The reported result may be biasedhigh.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Supplemental Open Channel SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3Hydro-PS Acid0.012ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0061PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3Hydro-EVE Acid1.5UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.014PQLSEEP-A-1-24-SPLIT-A-091520-Z09/15/2020320-64780-3Hydro-EVE Acid1.6UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.014PQLPage 13 of 20DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
High relative percent difference (RPD) observed between field duplicate and parent sample. The reported result may be imprecise.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Supplemental Open Channel SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsLOC-SEEP-B-1-SPLIT-A-09162009/16/2020320-64813-5R-PSDCA0.055UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.017PQLLOC-SEEP-B-1-SPLIT-A-09162009/16/2020320-64813-5PFO5DA0.19ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.078PQLLOC-SEEP-B-1-SPLIT-A-091620-D09/16/2020320-64813-9PES0.045UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0067PQLLOC-SEEP-B-1-SPLIT-A-091620-D09/16/2020320-64813-9R-PSDCA0.086UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.017PQLLOC-SEEP-B-1-SPLIT-A-091620-D09/16/2020320-64813-9PFO5DA0.27ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.078PQLLOC-SEEP-B-1-SPLIT-A-091620-Z09/16/2020320-64813-7PFO5DA0.18ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.078PQLLOC-SEEP-B-1-SPLIT-B-091620-Z09/16/2020320-64813-8PES0.014UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0067PQLSED3-10122010/12/2020320-65553-2PFO2HxA26UG/KGCl. Spec. Table 3Compound SOPJShake_Bath_14D1.0PQLSED3-10122010/12/2020320-65553-2PFO3OA15UG/KGCl. Spec. Table 3Compound SOPJShake_Bath_14D1.0PQLSED3-10122010/12/2020320-65553-2PFO4DA5.3UG/KGCl. Spec. Table 3Compound SOPJShake_Bath_14D1.0PQLSED3-10122010/12/2020320-65553-2PFO4DA8.2UG/KGCl. Spec. Table 3Compound SOPJShake_Bath_14D1.0PQLSED3-10122010/12/2020320-65553-2PFO5DA3.2UG/KGCl. Spec. Table 3Compound SOPJShake_Bath_14D1.0PQLSED3-10122010/12/2020320-65553-2PFO5DA4.1UG/KGCl. Spec. Table 3Compound SOPJShake_Bath_14D1.0PQLSED3-10122010/12/2020320-65553-2PFMOAA81UG/KGCl. Spec. Table 3Compound SOPJShake_Bath_14D1.0PQLSED3-10122010/12/2020320-65553-2Hydro-PS Acid4.4UG/KGCl. Spec. Table 3Compound SOPJShake_Bath_14D1.0PQLSED3-10122010/12/2020320-65553-2Hydro-PS Acid5.3UG/KGCl. Spec. Table 3Compound SOPJShake_Bath_14D1.0PQLSED3-101220-D10/12/2020320-65553-3PFO2HxA1.4UG/KGCl. Spec. Table 3Compound SOPJShake_Bath_14D1.0PQLPage 14 of 20DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
High relative percent difference (RPD) observed between field duplicate and parent sample. The reported result may be imprecise.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Supplemental Open Channel SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsSED3-101220-D10/12/2020320-65553-3PFMOAA3.6UG/KGCl. Spec. Table 3Compound SOPJShake_Bath_14D1.0PQLSED3-101220-D10/12/2020320-65553-3Hydro-PS Acid1.1UG/KGCl. Spec. Table 3Compound SOPJShake_Bath_14D1.0PQLLOC-20A-24-110520-D11/05/2020320-66446-5PFMOAA0.018ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-11052011/05/2020320-66446-4R-PSDA0.015UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-11052011/05/2020320-66446-4R-EVE0.0049UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-11052011/05/2020320-66446-4PFMOAA0.026ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-11052011/05/2020320-66446-4PFMOAA0.025ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-110520-D11/05/2020320-66446-5R-PSDA0.0072UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLCFR-TARHEEL-SPLIT-A-092420-Z09/24/2020320-65180-7R-EVE0.037UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLCFR-TARHEEL-SPLIT-B-09242009/24/2020320-65180-6Hydrolyzed PSDA0.0093UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLCFR-TARHEEL-SPLIT-B-09242009/24/2020320-65180-6PFMOAA0.012ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLCFR-TARHEEL-SPLIT-B-092420-D09/24/2020320-65180-10Hydrolyzed PSDA0.013UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLCFR-TARHEEL-SPLIT-B-092420-D09/24/2020320-65180-10PFMOAA0.017ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLCFR-TARHEEL-SPLIT-B-092420-D-Z09/24/2020320-65180-12Hydrolyzed PSDA0.0069UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLCFR-TARHEEL-SPLIT-B-092420-Z09/24/2020320-65180-8Hydrolyzed PSDA0.011UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLPage 15 of 20DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Quality review criteria exceeded between the REP (laboratory replicate) and parent sample. The reported result may be imprecise.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Supplemental Open Channel SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsLOC-20A-21-SPLIT-A-09162009/16/2020320-64782-1PFO2HxA0.011ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-21-SPLIT-A-09162009/16/2020320-64782-1PFO2HxA0.0098ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLPage 16 of 20DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Associated MS and/or MSD analysis had relative percent recovery (RPR) values less than the lower control limit but above the rejection limit. Thereported result may be biased low.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Supplemental Open Channel SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsSED3-10122010/12/2020320-65553-2PFO3OA9.1UG/KGCl. Spec. Table 3Compound SOPJShake_Bath_14D1.0PQLLOC-20A-24-SPLIT-A-09242009/24/2020320-65177-1PFMOAA0.018ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-A-09242009/24/2020320-65177-1PFMOAA0.018ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-B-09242009/24/2020320-65177-2PFMOAA0.0093ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-B-09242009/24/2020320-65177-2PFMOAA0.0093ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-B-092420-Z09/24/2020320-65177-4PFMOAA0.0082ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-20A-24-SPLIT-B-092420-Z09/24/2020320-65177-4PFMOAA0.0079ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7C-MID-24-SPLIT-A-09162009/16/2020320-64771-1PFMOAA0.013ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7C-MID-24-SPLIT-A-09162009/16/2020320-64771-1PFMOAA0.012ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7C-MID-24-SPLIT-A-09242009/24/2020320-65175-1PMPA0.19UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.020PQLLOC-7C-MID-24-SPLIT-A-09242009/24/2020320-65175-1PMPA0.19UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.020PQLLOC-7C-MID-24-SPLIT-A-09242009/24/2020320-65175-1PFMOAA0.0087ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-7C-MID-24-SPLIT-A-09242009/24/2020320-65175-1PFMOAA0.0091ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLLOC-SEEP-B-1-24-SPLIT-B-09152009/15/2020320-64813-2R-PSDCA0.056UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.017PQLLOC-SEEP-B-1-24-SPLIT-B-09152009/15/2020320-64813-2R-PSDCA0.055UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.017PQLLOC-SEEP-B-1-24-SPLIT-A-09152009/15/2020320-64813-1R-PSDCA0.052UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.017PQLPage 17 of 20DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Associated MS and/or MSD analysis had relative percent recovery (RPR) values less than the lower control limit but above the rejection limit. Thereported result may be biased low.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Supplemental Open Channel SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsLOC-SEEP-B-1-24-SPLIT-A-09152009/15/2020320-64813-1R-PSDCA0.049UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.017PQLLOC-SEEP-B-1-24-SPLIT-A-09152009/15/2020320-64813-1PFMOAA160ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.080PQLLOC-SEEP-B-1-24-SPLIT-A-09152009/15/2020320-64813-1PFMOAA170ug/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.080PQLPage 18 of 20DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Associated MS and/or MSD analysis had relative percent recovery (RPR) values less than the rejection level. The reported result may be biased low.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Supplemental Open Channel SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsSED3-10122010/12/2020320-65553-2PFO2HxA16UG/KGCl. Spec. Table 3Compound SOPJShake_Bath_14D1.0PQLSED3-10122010/12/2020320-65553-2PFMOAA46UG/KGCl. Spec. Table 3Compound SOPJShake_Bath_14D1.0PQLPage 19 of 20DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
The result is estimated since the concentration is between the method detection limit and practical quantitation limit.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Supplemental Open Channel SamplingAnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsEB-09162009/16/2020280-140581-14Carbon0.47MG/L0.359060AJ1.0MDLEB-09242009/24/2020L2040786-06Total Organic Carbon0.28MG/L0.119060AJ0.50MDLFB-09162009/16/2020280-140581-15Carbon0.50MG/L0.359060AJ1.0MDLFB-09242009/24/2020L2040786-07Total Organic Carbon0.31MG/L0.119060AJ0.50MDLPage 20 of 20DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF

TR0795 November 2020

APPENDIX B
Piezometer Borehole Logs

DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Fayetteville Site Investigation
The Chemours Company FC, LLC
Project Number: 452344.02000
Date Started : 10/2/20
Date Completed : 10/2/20
Drilling Method : Direct-Push
Sampling Method : Macrocore
Drilling Firm : SAEDACCO
Lead Driller/License # : Brian Ewing/4240
Geologist : Brandon Weidner
Boring Log By : Karen Teague
LOG OF BORING: PZ-25R
(Page 1 of 2)
Northing : 395,971.54
Easting : 2,050,748.23
Depth
in
feet
0
1
2
3
4
5
6
7
8
9
10
DESCRIPTION
SILTY SAND: brown (10YR 4/3), fine to
medium-grained, soft/friable, subangular,
damp
CLAYEY SAND: brown (7.5YR 4/6), fine
to medium-grained, stiff to firm, damp,
slightly plastic
SAND: brown (7.5YR 4/6),
medium-grained, with clay, loose to soft,
damp
1" layer of very fine to fine-grained sand USCSSM
SC
SP
SP GRAPHICSurf.
Elev.
145.03
145.03
144.03
143.03
142.03
141.03
140.03
139.03
138.03
137.03
136.03
Depth
in
feet
0
1
2
3
4
5
6
7
8
9
10
147.51
Piezometer: PZ-25R
Grout
Bentonite
Sand
Riser
Screen
Well Construction
Information
WELL RISER
Material : PVC
Diameter : 1"
WELL SCREEN
Material : PVC
Diameter : 1"
Slot Size : 0.010"
Length : 10'
SAND PACK
Material : Sand
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Fayetteville Site Investigation
The Chemours Company FC, LLC
Project Number: 452344.02000
Date Started : 10/2/20
Date Completed : 10/2/20
Drilling Method : Direct-Push
Sampling Method : Macrocore
Drilling Firm : SAEDACCO
Lead Driller/License # : Brian Ewing/4240
Geologist : Brandon Weidner
Boring Log By : Karen Teague
LOG OF BORING: PZ-25R
(Page 2 of 2)
Northing : 395,971.54
Easting : 2,050,748.23
Depth
in
feet
10
11
12
13
14
15
16
17
18
19
20
DESCRIPTION
CLAY: yellowish brown (10YR 5/6),
moderate plasticity, firm to hard, damp USCSSP GRAPHICSurf.
Elev.
145.03
135.03
134.03
133.03
132.03
131.03
130.03
129.03
128.03
127.03
126.03
Depth
in
feet
10
11
12
13
14
15
16
17
18
19
20
147.51
Piezometer: PZ-25R
Sand
Screen
Well Construction
Information
WELL RISER
Material : PVC
Diameter : 1"
WELL SCREEN
Material : PVC
Diameter : 1"
Slot Size : 0.010"
Length : 10'
SAND PACK
Material : Sand
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Fayetteville Site Investigation
The Chemours Company FC, LLC
Project Number: 452344.02000
Date Started : 9/30/20
Date Completed : 9/30/20
Drilling Method : Direct-Push
Sampling Method : Macrocore
Drilling Firm : SAEDACCO
Lead Driller/License # : Brian Ewing/4240
Geologist : Brandon Weidner
Boring Log By : Karen Teague
LOG OF BORING: PZ-36
(Page 1 of 1)
Northing : 396,086.17
Easting : 2,051,331.44
Depth
in
feet
0
1
2
3
4
5
6
7
8
9
10
11
DESCRIPTION
SILTY SAND: Reddish yellow (7.5YR
6/6), fine grained, subrounded grains,
damp
SAND: brown (7.5 YR 5/6),
medium-grained, subrounded grains,
saturated, full of heavy minerals (metals)
light gray (7.5YR 7/1)
SAND: light grey (7.5YR 7/1), medium to
increasing coarse-grained, subangular,
saturated, well sorted, trace heavy metals
CLAY: dark grey (7.5YR 4/1), stiff, damp,
medium plasticity, micaceous, interbedded
very fine-grained sand, light grey (7.5YR
7/1)
END of BORING USCSSM
SP
SP
SW
CL GRAPHICSurf.
Elev.
135.37
135.37
134.37
133.37
132.37
131.37
130.37
129.37
128.37
127.37
126.37
125.37
Depth
in
feet
0
1
2
3
4
5
6
7
8
9
10
11
135.20
Piezometer: PZ-36
Grout
Bentonite
Sand
Riser
Screen
Well Construction
Information
WELL RISER
Material : PVC
Diameter : 1"
WELL SCREEN
Material : PVC
Diameter : 1"
Slot Size : 0.010"
Length : 3.5'
SAND PACK
Material : Sand
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Fayetteville Site Investigation
The Chemours Company FC, LLC
Project Number: 452344.02000
Date Started : 9/28/20
Date Completed : 9/29/20
Drilling Method : Direct-Push
Sampling Method : Macrocore
Drilling Firm : SAEDACCO
Lead Driller/License # : Brian Ewing/4240
Geologist : Brandon Weidner
Boring Log By : Karen Teague
LOG OF BORING: PZ-37
(Page 1 of 1)
Northing : 396,042.40
Easting : 2,051,050.05
Depth
in
feet
0
1
2
3
4
5
6
7
8
9
10
11
DESCRIPTION
SILTY SAND: medium-brown (10YR 5/6),
medium-grained, roots present, damp, soft
Yellowish brown (10YR 6/8),
medium-grained, moist, loose sand
Light grey (10YR 7/1), medium-grained,
subangular grains, moist
Subrounded grains, loose sand, trace
heavy minerals (metals)
CLAY: very soft, mottled
yellowish-brown (10YR 5/4) and
brownish-yellow (10YR 6/6), damp,
medium plasticity
SAND: dark grey (7.5YR 4/1),
medium-stiff, damp, interbedded very
fine-grained light grey sand (7.5YR 7/1),
micaceous
END of BORING USCSSM
SM
SM
SM
CL
SP GRAPHICSurf.
Elev.
135.83
135.83
134.83
133.83
132.83
131.83
130.83
129.83
128.83
127.83
126.83
125.83
Depth
in
feet
0
1
2
3
4
5
6
7
8
9
10
11
135.56
Piezometer: PZ-37
Grout
Bentonite
Sand
Riser
Screen
Well Construction
Information
WELL RISER
Material : PVC
Diameter : 1"
WELL SCREEN
Material : PVC
Diameter : 1"
Slot Size : 0.010"
Length : 3'
SAND PACK
Material : Sand
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Fayetteville Site Investigation
The Chemours Company FC, LLC
Project Number: 452344.02000
Date Started : 9/29/20
Date Completed : 9/29/20
Drilling Method : Direct-Push
Sampling Method : Macrocore
Drilling Firm : SAEDACCO
Lead Driller/License # : Brian Ewing/4240
Geologist : Brandon Weidner
Boring Log By : Karen Teague
LOG OF BORING: PZ-38
(Page 1 of 1)
Northing : 395,970.01
Easting : 2,050,569.66
Depth
in
feet
0
1
2
3
4
5
6
7
8
9
10
11
DESCRIPTION
CLAYEY SAND: strong brown (7.5YR
5/6), fine to increasing medium-grained,
decreasing clay with depth, damp, loose,
roots, trace mica
SILTY SAND: brownish yellow (10YR
6/6), fine-grained, subrounded grains,
very loose, damp
SILTY SAND: interbedded colors of
yellow brown (10YR 5/8), brownish
yellow (10YR 6/8) and brown (10YR 5/3),
fine to medium-grained increasing grains
size with depth, subrounded, moist, loose
SILTY SAND: brownish yellow (10YR
6/6), medium to increasing course grains
with depth, subrounded grains, trace
heavy minerals throughout
Light grey (10YR 7/1), large grains
CLAY: dark grey (10YR 4/1), high
plasticity, firm to hard, medium to
coarse-grained sand 1/2" thick, loose; last
2" is pink (7.5YR 7/3)
END of BORING USCSSC
SM
SM
SM
SM
CL GRAPHICSurf.
Elev.
137.56
137.56
136.56
135.56
134.56
133.56
132.56
131.56
130.56
129.56
128.56
127.56
Depth
in
feet
0
1
2
3
4
5
6
7
8
9
10
11
137.34
Piezometer: PZ-38
Grout
Bentonite
Sand
Riser
Screen
Well Construction
Information
WELL RISER
Material : PVC
Diameter : 1"
WELL SCREEN
Material : PVC
Diameter : 1"
Slot Size : 0.010"
Length : 4'
SAND PACK
Material : Sand
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Fayetteville Site Investigation
The Chemours Company FC, LLC
Project Number: 452344.02000
Date Started : 9/30/20
Date Completed : 9/30/20
Drilling Method : Direct-Push
Sampling Method : Macrocore
Drilling Firm : SAEDACCO
Lead Driller/License # : Brian Ewing/4240
Geologist : Brandon Weidner
Boring Log By : Karen Teague
LOG OF BORING: PZ-39
(Page 1 of 1)
Northing : 395,921.87
Easting : 2,050,238.18
Depth
in
feet
0
1
2
3
4
5
6
7
8
9
10
11
12
13
DESCRIPTION
CLAYEY SAND: strong brown (7.5YR
5/6), fine to medium-grained, subrounded,
low plasticity, moist
SANDY CLAY: light grey (7.5YR 7/1),
medium plasticity, very fine-grained,
subrounded
SAND: light grey (7.5YR 7/1), very fine to
fine-grained, heavy minerals (metals)
present, saturated, very loose
Yellow (10YR 7/6)
SAND: light grey (10YR 7/1),
medium-grained to decreasing grain size
with depth, subangular, loose, metals,
saturated
Very fine-grained
CLAY: mottled brownish yellow (10YR
6/6) and yellowish brown (10YR 6/8),
high plasticity, soft, damp
SANDY CLAY: dark grey, (10YR 4/1),
very fine-grained sand, medium plasticity,
damp, micaceous
END of BORING USCSSC
CL
SP
SP
SW
SP
CL
CL GRAPHICSurf.
Elev.
138.21
138.21
137.21
136.21
135.21
134.21
133.21
132.21
131.21
130.21
129.21
128.21
127.21
126.21
Depth
in
feet
0
1
2
3
4
5
6
7
8
9
10
11
12
13
137.93
Piezometer: PZ-39
Grout
Bentonite
Sand
Riser
Screen
Well Construction
Information
WELL RISER
Material : PVC
Diameter : 1"
WELL SCREEN
Material : PVC
Diameter : 1"
Slot Size : 0.010"
Length : 5'
SAND PACK
Material : Sand
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Fayetteville Site Investigation
The Chemours Company FC, LLC
Project Number: 452344.02000
Date Started : 9/29/20
Date Completed : 9/29/20
Drilling Method : Direct-Push
Sampling Method : Macrocore
Drilling Firm : SAEDACCO
Lead Driller/License # : Brian Ewing/4240
Geologist : Brandon Weidner
Boring Log By : Karen Teague
LOG OF BORING: PZ-40
(Page 1 of 1)
Northing : 395,943.02
Easting : 2,050,031.90
Depth
in
feet
0
1
2
3
4
5
6
7
8
9
10
11
12
13
DESCRIPTION
SILTY SAND: strong brown (7.5YR 5/8),
very fine to fine-grained, subangular,
loose, damp
CLAYEY SAND: strong brown (7.5YR
5/6), damp, roots, firm
CLAYEY SAND: brown (7.5YR 5/3),
medium-grained, subrounded, moist,
lighter brown grains at 5'
SAND: light brown, fine-grained
(medium-grained at 7' and 9'), heavy
minerals, moist, 1/2" clay lenses
throughout section
Saturated
CLAY: mottled brownish yellow (10YR
6/6) with yellowish brown (10YR 6/8),
very soft, high plasticity, moist
Very dark grey (7.5YR 3/1), high
plasticity, hard, damp
END of BORING USCSSM
SC
SC
SP
SP
CL
CL GRAPHICSurf.
Elev.
138.80
138.8
137.8
136.8
135.8
134.8
133.8
132.8
131.8
130.8
129.8
128.8
127.8
126.8
Depth
in
feet
0
1
2
3
4
5
6
7
8
9
10
11
12
13
138.51
Piezometer: PZ-40
Grout
Bentonite
Sand
Riser
Screen
Well Construction
Information
WELL RISER
Material : PVC
Diameter : 1"
WELL SCREEN
Material : PVC
Diameter : 1"
Slot Size : 0.010"
Length : 4'
SAND PACK
Material : Sand
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Fayetteville Site Investigation
The Chemours Company FC, LLC
Project Number: 452344.02000
Date Started : 9/30/20
Date Completed : 9/30/20
Drilling Method : Direct-Push
Sampling Method : Macrocore
Drilling Firm : SAEDACCO
Lead Driller/License # : Brian Ewing/4240
Geologist : Brandon Weidner
Boring Log By : Karen Teague
LOG OF BORING: PZ-41
(Page 1 of 1)
Northing : 395,979.29
Easting : 2,050,048.97
Depth
in
feet
0
1
2
3
4
5
6
7
8
9
10
11
12
13
DESCRIPTION
SILTY SAND: very pale brown (10YR
7/4), fine-grained, subangular grains,
loose, damp, roots
medium-grained
CLAYEY SAND: light grey (10YR 7/1),
very fine-grained, low plasticity, stiff,
damp
SAND: very pale brown (10YR 7/3), very
fine-grained, subrounded, loose,
saturated
SAND: very pale brown (10YR 7/4), very
fine to medium-grained with depth, heavy
minerals, saturated
2" layer of light grey (10YR 7/1)
CLAY: mottled brownish yellow (10YR
6/6), yellowish brown (10YR 6/8) and
dark grey (7.5YR 4/1), fine to
medium-grained, micaceous
END of BORING USCSSM
SM
SC
SP
SW
SW
CL GRAPHICSurf.
Elev.
138.34
138.34
137.34
136.34
135.34
134.34
133.34
132.34
131.34
130.34
129.34
128.34
127.34
126.34
Depth
in
feet
0
1
2
3
4
5
6
7
8
9
10
11
12
13
138.13
Piezometer: PZ-41
Grout
Bentonite
Sand
Riser
Screen
Well Construction
Information
WELL RISER
Material : PVC
Diameter : 1"
WELL SCREEN
Material : PVC
Diameter : 1"
Slot Size : 0.010"
Length : 3.5'
SAND PACK
Material : Sand
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Fayetteville Site Investigation
The Chemours Company FC, LLC
Project Number: 452344.02000
Date Started : 9/30/20
Date Completed : 9/30/20
Drilling Method : Direct-Push
Sampling Method : Macrocore
Drilling Firm : SAEDACCO
Lead Driller/License # : Brian Ewing/4240
Geologist : Brandon Weidner
Boring Log By : Karen Teague
LOG OF BORING: PZ-42
(Page 1 of 1)
Northing : 395,961.73
Easting : 2,050,230.23
Depth
in
feet
0
1
2
3
4
5
6
7
8
9
10
11
12
13
DESCRIPTION
SILTY SAND: very pale brown (10YR
8/2), fine-grained sand, increasing to
medium-grained with depth, subrounded,
loose, moist
White (7.5YR 8/1)
Very pale brown (10YR 8/2)
CLAYEY SAND: light grey (10YR 7/1),
medium-grained, subrounded, medium
plasticity
SAND: light grey (10YR 7/1), fine to
medium-grained, finer grains with depth,
subrounded, loose, saturated
very fine to fine-grained, dense, very
stiff, damp
CLAY: mottled yellowish brown (10YR
6/6) and brownish yellow (10YR 6/8),
interbedded light grey layers (10YR 7/1),
high plasticity, moist, soft
Dark grey (7.5YR 4/1), high plasticity,
wood fragments (reddish color), stiff
END of BORING USCSSM
SM
SM
SC
SP
SP
CL
CL GRAPHICSurf.
Elev.
138.44
138.44
137.44
136.44
135.44
134.44
133.44
132.44
131.44
130.44
129.44
128.44
127.44
126.44
Depth
in
feet
0
1
2
3
4
5
6
7
8
9
10
11
12
13
138.17
Piezometer: PZ-42
Grout
Bentonite
Sand
Riser
Screen
Well Construction
Information
WELL RISER
Material : PVC
Diameter : 1"
WELL SCREEN
Material : PVC
Diameter : 1"
Slot Size : 0.010"
Length : 4'
SAND PACK
Material : Sand
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Fayetteville Site Investigation
The Chemours Company FC, LLC
Project Number: 452344.02000
Date Started : 10/1/20
Date Completed : 10/1/20
Drilling Method : Direct-Push
Sampling Method : Macrocore
Drilling Firm : SAEDACCO
Lead Driller/License # : Brian Ewing/4240
Geologist : Brandon Weidner
Boring Log By : Karen Teague
LOG OF BORING: PZ-43
(Page 1 of 1)
Northing : 396,011.61
Easting : 2,050,567.89
Depth
in
feet
0
1
2
3
4
5
6
7
8
9
10
11
12
13
DESCRIPTION
SILTY SAND: brown (10YR 5/3), very
fine to fine-grained, subangular, damp,
roots
CLAYEY SAND: yellowish brown (10YR
5/4), fine-grained, subrounded, damp
SAND: pinkish grey (7.5YR 7/2), very fine
to fine-grained, trace coarse-grains and
heavy minerals
Yellow (10YR 8/6), fine-grained, damp,
heavy minerals
trace mica
Light grey 1" layer
SAND: reddish yellow (7.5YR 6/8)
medium-grained, subangular, saturated
CLAY: mottled brownish yellow (10YR
6/6) and yellowish brown (10YR 6/8),
medium stiff, high plasticity, damp
SILTY SAND: alternating white (7.5YR
8/1) and reddish yellow (7.5YR 7/6)
END of BORING USCSSM
SC
SP
SP
SP
SP
SP
CL
SM GRAPHICSurf.
Elev.
137.20
137.2
136.2
135.2
134.2
133.2
132.2
131.2
130.2
129.2
128.2
127.2
126.2
125.2
Depth
in
feet
0
1
2
3
4
5
6
7
8
9
10
11
12
13
137.06
Piezometer: PZ-43
Grout
Bentonite
Sand
Riser
Screen
Well Construction
Information
WELL RISER
Material : PVC
Diameter : 1"
WELL SCREEN
Material : PVC
Diameter : 1"
Slot Size : 0.010"
Length : 4'
SAND PACK
Material : Sand
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Fayetteville Site Investigation
The Chemours Company FC, LLC
Project Number: 452344.02000
Date Started : 10/1/20
Date Completed : 10/1/20
Drilling Method : Direct-Push
Sampling Method : Macrocore
Drilling Firm : SAEDACCO
Lead Driller/License # : Brian Ewing/4240
Geologist : Brandon Weidner
Boring Log By : Karen Teague
LOG OF BORING: PZ-44
(Page 1 of 1)
Northing : 396,082.75
Easting : 2,051,045.25
Depth
in
feet
0
1
2
3
4
5
6
7
8
9
10
11
12
13
DESCRIPTION
SILTY SAND: brown (10YR 5/3),
fine-grained, subangular, roots, damp,
loose
SAND: light brown (7.5YR 6/4),
medium-grained, subangular, very loose,
damp
Pinkish white (7.5YR 8/2), subangular,
very loose, moist
SAND: yellowish brown (10YR 6/8),
medium to coarse-grained, subangular,
trace clay, saturated
SILTY SAND: light grey (10YR 7/1),
coarse-grained, subangular, trace metals,
saturated
CLAY: dark grey (7.5YR 4/1), high
plasticity, stiff, damp, interbedded with
very fine sands througout, micaceous and
medium plasticity
mottled yellowish brown (10YR 6/6) and
(10YR 6/8), soft
END of BORING USCSSM
SP
SP
SP
SM
CL
CL GRAPHICSurf.
Elev.
136.44
136.44
135.44
134.44
133.44
132.44
131.44
130.44
129.44
128.44
127.44
126.44
125.44
124.44
Depth
in
feet
0
1
2
3
4
5
6
7
8
9
10
11
12
13
136.26
Piezometer: PZ-44
Grout
Bentonite
Sand
Riser
Screen
Well Construction
Information
WELL RISER
Material : PVC
Diameter : 1"
WELL SCREEN
Material : PVC
Diameter : 1"
Slot Size : 0.010"
Length : 2'
SAND PACK
Material : Sand
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF
Fayetteville Site Investigation
The Chemours Company FC, LLC
Project Number: 452344.02000
Date Started : 10/1/20
Date Completed : 10/1/20
Drilling Method : Direct-Push
Sampling Method : Macrocore
Drilling Firm : SAEDACCO
Lead Driller/License # : Brian Ewing/4240
Geologist : Brandon Weidner
Boring Log By : Karen Teague
LOG OF BORING: PZ-45
(Page 1 of 1)
Northing : 396,124.41
Easting : 2,051,323.03
Depth
in
feet
0
1
2
3
4
5
6
7
8
9
10
11
12
13
DESCRIPTION
SILTY SAND: brown (10YR 5/3),
fine-grained, loose, roots, damp
CLAYEY SAND: strong brown (7.5YR
4/6), medium-grained, subangular, loose,
moist
Light grey layer (7.5YR 7/1)
Saturated, increased clay with depth
CLAY: mottled, brownish yellow (10YR
6/6), yellowish brown (10YR 6/8) and
dark grey (7.5YR 4/1), high plasticity
damp
Dark grey (7.5YR 4/1)
END of BORING USCSSM
SC
SC
SC
CL
CL
CL GRAPHICSurf.
Elev.
135.83
135.83
134.83
133.83
132.83
131.83
130.83
129.83
128.83
127.83
126.83
125.83
124.83
123.83
Depth
in
feet
0
1
2
3
4
5
6
7
8
9
10
11
12
13
135.69
Piezometer: PZ-45
Grout
Bentonite
Sand
Riser
Screen
Well Construction
Information
WELL RISER
Material : PVC
Diameter : 1"
WELL SCREEN
Material : PVC
Diameter : 1"
Slot Size : 0.010"
Length : 2'
SAND PACK
Material : Sand
DocuSign Envelope ID: 71814081-4C1E-4593-B546-CA7F36013DAF