2021.11.30_CCOA.p2a_Interim Seep Remediation O-M Report_No5

TR0795A ES-1 November 2021
EXECUTIVE SUMMARY
This Operations and Maintenance Report #5 (O&M Report #5) has been prepared to document the
operations, maintenance, and performance of the flow-through cells at Seeps A, B, C, and D from
September 1 through October 31, 2021. The median flow rate processed by the Seep A, B, and C,
and D FTCs was 81, 113, 53, and 84 gallons per minute (gpm), respectively. As documented in
the previous O&M Reports #1 through #4, the FTC systems are capable of capturing total base
flow under favorable hydraulic conditions, and additionally capture and treat a portion of wet
weather flow as well. In total, over the two-month reporting period, the systems processed
approximately 32,100,000 gallons of seep flow. Composite samples from performance monitoring
indicated the PFAS removal efficiency of the captured base flow ranged from approximately 89.0
to >99.9%, and the FTCs are estimated to have prevented approximately 59.7 pounds (lbs) of
PFAS from being discharged to the Cape Fear River in the reporting period, and 180.7 lbs of PFAS
over the lifetime of the systems to date.

TR0795A i November 2021
TABLE OF CONTENTS
EXECUTIVE SUMMARY .............................................................................................................1
1. Introduction ...............................................................................................................................4
2. Inspections, Operation, and Maintenance .................................................................................5 2.1 Inspections .......................................................................................................................5
2.2 Duty Cycling ...................................................................................................................5
2.3 FTC Management During River Flooding ......................................................................6
2.4 Material Changeouts ........................................................................................................6
2.5 Issues Encountered and Resolutions ...............................................................................6
3. Data Collected ..........................................................................................................................8
3.1 Pressure Transducers .......................................................................................................8
3.2 Rainfall and River Stage ..................................................................................................8
3.3 Operational and Treatment Performance Monitoring .....................................................8
3.3.1 Performance Monitoring .....................................................................................9
3.3.2 Breakthrough Monitoring ....................................................................................9
3.3.3 Water Quality Monitoring ...................................................................................9
3.3.4 Rain Event Monitoring ........................................................................................9
3.4 Deviations ......................................................................................................................10
3.4.1 Performance Monitoring and Wet Weather Sampling Deviations ....................10
4. Results.....................................................................................................................................11 4.1 System Flowrates and Operational Periods ...................................................................11
4.1.1 System Flowrate ................................................................................................11
4.1.2 Bypass Flow ......................................................................................................12
4.2 Performance Monitoring Analytical Results ................................................................12
4.3 System Effectiveness .....................................................................................................13
4.4 Wet Weather Sampling Results .....................................................................................13
4.5 River Elevation and Precipitation ..................................................................................14
4.6 Water Quality ................................................................................................................14
4.7 GAC Usage ....................................................................................................................15
5. Summary .................................................................................................................................16
6. References ...............................................................................................................................17

TR0795A ii November 2021
LIST OF TABLES
Table 1a-d Summary of Operations and Maintenance Activities – Seeps A-D
Table 2a-d Sampling Summary – Seeps A-D
Table 3a-d Summary of Performance Monitoring Analytical Results – Seeps A-D
Table 4a-d Summary of Wet Weather Analytical Results – Seeps A-D
Table 5 Cape Fear River Elevation and Precipitation Statistics
Table 6a-d Water Quality Data – Seeps A-D

LIST OF FIGURES
Figure 1 River Level and Seep C FTC As-Built Elevations
Figure 2a-d Measured Discharge Flowrate – Seeps A-D
Figure 3a-d Influent Water Elevation and Bypass Flow – Seeps A-D
Figure 4 Seep B Turbidity Logging and Precipitation (September - October 2021)

LIST OF APPENDICES
Appendix A Transducer Data Reduction
Appendix B Laboratory Analytical Data Review Narrative

TR0795A iii November 2021
LIST OF ACRONYMS AND ABBREVIATIONS
% percent
CO Addendum Addendum to Consent Order Paragraph 12
DB Discharge Basin
DO Dissolved oxygen
ESB Effluent Stilling Basin
FB1 Filter Bed-1
FB2 Filter Bed-2
FTC flow-through cell
ft msl feet mean sea level
GAC granular activated carbon
gpm gallons per minute
HDPE high-density polyethylene
HFPO-DA hexafluoropropylene oxide dimer
IC Inlet Chamber
IP Individual Permit
ISB Influent Stilling Basin
lbs pounds
mg/L milligrams per liter
ng/L nanograms per liter
NTU nephelometric turbidity units
O&M Operation and Maintenance
PFAS per- and polyfluoroalkyl substances
PFD Process Flow Diagram
PFMOAA perfluoro-2-methoxyacetic acid
PMPA perfluoromethoxypropyl carboxylic acid
TB Transfer Basin
TSS total suspended solids
USGS United States Geological Survey

TR0795A 4 November 2021
1. INTRODUCTION
Geosyntec Consultants of NC, PC (Geosyntec) has prepared this Interim Seep Remediation
Operation and Maintenance (O&M) Report #5 (“O&M Report #5”) on behalf of The Chemours
Company FC, LLC (Chemours) to provide a summary report of Operations and Maintenance for
the flow-through cells (FTCs) installed as the interim remediation systems at Seeps A, B, C and D
at the Chemours Fayetteville Works Site (the Site). This O&M Report #5 has been prepared for
the operational period of September 1 through October 31, 2021. The next O&M Report (#6) will
cover the bimonthly period of November 1 through December 31, 2021.
As the O&M Report #1 from March 31, 2021 presented FTC performance data for the first time,
detailed information was provided on the hydraulic mechanics of the system, flood management
practices, data collection methodology and reduction process, and flow calculation formulas. As a
simplifying step for presentation clarity, at various sections in this O&M Report #5, reference is
made to these details in O&M Report #1. For an overview of the hydraulic functionality of the
system, see Section 1.1 of O&M Report #1.

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2. INSPECTIONS, OPERATION, AND MAINTENANCE
The following sections describe the inspections, operation, and maintenance activities completed
at the four FTCs during the current reporting period (September 1 through October 31, 2021).
2.1 Inspections
Per the CO Addendum, routine inspections occurred on a weekly basis (at a minimum), and also
occurred after 0.5 inch or greater rain events within a 24-hour period. An Inspection Form was
filled out by operation, maintenance, and monitoring personnel during each inspection.
The routine inspections included, but were not limited to:
• documenting the system duty cycle (i.e., lead/lag orientation of the GAC filter beds)
• measuring and collecting operational parameters/data, notably water elevation data that are
used to evaluate influent flowrate and the occurrence (if any) of bypass
• documenting any potential observed issues, such as sediment accumulation in the
impoundment basin, structural problems, GAC fouling, and debris that is impairing flow
through the system
• inspecting the autosamplers
• photographing the conditions observed, including any bypass flow
A summary of the inspection and maintenance events completed during this reporting period is
provided in Tables 1a-d for Seeps A-D, respectively. Further details of these events are provided
in the following subsections.
2.2 Duty Cycling
As described in Section 1.1 of the O&M Report #1, the Seep FTCs are constructed of two filter
beds which operate in series. Tables 1a-d detail the filter bed configurations for Seeps A, B, C, and
D over the reporting period of September 1 through October 31, 2021. The approximate number
of days each filter bed was in lead during the reporting period for Seeps A, B, C, and D is
summarized in the table below:

Seep FB1 Lead (days) FB2 Lead (days) Total Uptime in Reporting
Period (days)
A 59 2 61
B 6 55 61
C 42 19 61
D 53 8 61

TR0795A 6 November 2021
2.3 FTC Management During River Flooding
As described in the Interim Seeps Remediation System Plan (Geosyntec, 2020), to treat total base
flow of each seep, it was necessary to install the interim remedies within the floodway. The
historical river elevations were referenced to develop the design elevations of key features such as
the spillway and the top of the wall. Additionally, an action level was developed for autosampler
removal to prevent damage to electronic components by flood waters. Based on a review of the
historical record, a W.O. Huske Lock and Dam gage height of 10 feet (or approximately 38 ft
above mean sea level) was selected as the action level for removing autosamplers. Review of
historical river stage data indicated that once the river level exceeded this action level, it would
typically continue to rise past the level of the FTC walls.
The Cape Fear River was below the action level during the full reporting period (September 1
through October 31, 2021). More details regarding the Cape Fear River are described in Section
4.5.
2.4 Material Changeouts
As discussed in the Interim Seeps Remediation System Plan (Geosyntec, 2020), when
breakthrough monitoring sampling indicated the concentration of PFAS in the midpoint of the
system reached approximately 30% of the concentration of PFAS in the influent, a GAC changeout
was scheduled. The table below summarizes the material changeouts through this reporting period:
Seep Filter Bed GAC Changeout
Date (GAC Age/Lead Days)
B FB1 September 9, 2021 94/90
C FB1 October 1, 2021 95/69
C FB2 October 18, 2021 84/20
D FB1 October 26, 2021 125/123.5

2.5 Issues Encountered and Resolutions
Observations from routine inspections noted fine-grained sediment with the addition of algae
accumulating on the surface of the filter beds, especially in the lead filter bed. The table below
summarizes the average turbidity, in nephelometric turbidity units (NTU), prior to construction of
each FTC (Geosyntec, 2020) and the average turbidity following startup of each system through
this reporting period (September 1 through October 31, 2021):

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Seep
Average Turbidity
Prior to Construction
(NTU)
Average Turbidity Since
Startup (NTU)
Average Turbidity
During Storm Events
(NTU)*
A 13 54 352
B 11 24 16
C 28 58 52
D 5 59 18
*The rain event from September 22, 2021 was selected as a representative storm for all four seeps.
As documented in O&M Reports #1, #2, #3, and #4, sediment management techniques were
developed and refined, including:
• Scrubbing and vacuuming the geocomposite layer above the GAC;
• Periodic replacement of both the geocomposite and the top few inches of GAC underneath
the geocomposite;
• Installation of a turbidity curtain in the upstream impoundment; Installation of rip rap
aprons in front of the FTC inlet chambers, with geocomposite above the rip rap, to provide
additional surface area for sediment deposition prior to entering the flow-through cell;
Addition of masonry sand on top of the stone layer in the Inlet Chamber (IC) to reduce
sediment loading into the filter beds; and
• Installation of tarps to cover all FTC chambers, most notably the filter beds, to reduce
sunlight reaching the geocomposite layer and minimize algae growth.
In addition, since O&M Report #4, GreenClean®, a commercial biocide, has been applied to
the inlet basins and lead filter bed at Seeps B and D to reduce algae and/or bacterial growth.

TR0795A 8 November 2021
3. DATA COLLECTED
The FTC includes design components to measure water levels in the system, precipitation, water
quality, and PFAS removal performance. The W.O. Huske Lock and Dam gage station is also used
to reference nearby precipitation and river levels.
3.1 Pressure Transducers
The Influent Chamber (IC) and Effluent Stilling Basin (ESB) are each equipped with a stilling well
in which a non-vented Levelogger® is installed below the operational water level. The water levels
acquired from processing the transducer data are used to estimate flows the system processes, and
to record the occurrence of flow that is diverted past the system via the Bypass Spillway. Section
4.1 of the O&M Report #1 describes the process used to calculate the flowrates through the FTC
based on the water levels.
The pressure transducer data were downloaded regularly as part of routine inspections (weekly at
a minimum). Additionally, manual water level measurements were collected in the basins and
stilling wells whenever transducers were downloaded to equilibrate the transducer readings
(discussed in Section 4.1).
3.2 Rainfall and River Stage
Precipitation and river stage are monitored by using the United States Geological Survey (USGS)
weather monitoring station at the W.O. Huske Dam (gage 02105500). This station is
approximately 1,200 feet from Seep C and records precipitation and river elevation data every 15
minutes. During this reporting period, a disparity was observed between the USGS W.O. Huske
Dam precipitation and local rain gauges at Seeps A-D, in which the Huske rain gauge consistently
recorded less rainfall than local gauges at the FTCs, in some instances by a significant margin
(e.g., on October 26, the USGS rain gauge recorded no precipitation, but both the Seep A and Seep
C rain gauges recorded 0.53 inches). In future reports, both data sets will be presented. At Seeps
A and C, local rain gauge telemetry data was available beginning October 10 and is included in
this report. Seep B and D telemetry equipment is expected to be installed in November 2021 and
will be presented in O&M Report #6.
3.3 Operational and Treatment Performance Monitoring
Operational and performance monitoring of the system includes the composite collection of water
samples from various locations in the system, and direct measurement of water quality parameters.
The operational and performance monitoring is completed on a regular basis to evaluate:
• PFAS removal efficiency (i.e., performance monitoring)
• breakthrough of PFAS compounds between GAC filter beds, using grab samples on an as-
needed basis (i.e., breakthrough monitoring)
• water quality parameters specified in the CO Addendum

TR0795A 9 November 2021
• potential effects of 0.5-inch rain events on PFAS concentrations (i.e., wet weather
monitoring)
3.3.1 Performance Monitoring
Composite samples for performance monitoring are collected using portable, battery-powered
autosamplers (e.g., Teledyne ISCO 6712 Full-Size Portable Sampler). At the end of the sampling
period, the operation, maintenance, and monitoring personnel fill laboratory-supplied sample
containers from the common container within the autosampler. Sampling is conducted in
accordance with the PFAS Quality Assurance Project Plan (AECOM, 2018). Any adjustments
made to address potential deficiencies (e.g., low battery power, river flooding) are documented on
the Inspection Form.
During this reporting period, four performance monitoring samples were collected for Seeps A, C,
and D, and five performance monitoring samples each were collected for Seep B (Table 2). Dates
of composite periods for each sample are listed in Table 2.
Samples were stored on wet ice in a cooler until shipment to an external laboratory (Eurofins
TestAmerica Laboratories Sacramento or Lancaster). Chain-of-custody documents were
completed and included with each shipment. Performance monitoring samples were analyzed for
Table 3+ PFAS, as outlined in the Interim Seep Remediation System Plan (Geosyntec, 2020).
3.3.2 Breakthrough Monitoring
Grab samples were collected from the IC, TB, and ESB at Seeps A-D for evaluation of system
performance and the need for GAC changeouts. Nine breakthrough monitoring samples each were
collected from Seeps A and D during this reporting period, ten breakthrough monitoring samples
were collected from Seep B, and seven breakthrough monitoring samples were collected from Seep
C during this reporting period (35 total).
3.3.3 Water Quality Monitoring
The water quality in the IC and ESB at Seeps A-D was monitored at the same minimum frequency
as performance monitoring described above – at least twice per month. Dissolved oxygen (DO),
pH, turbidity, specific conductivity, temperature, and total suspended solids (TSS) were measured
using a calibrated In-Situ Aqua TROLL 500 Multiparameter Sonde.
3.3.4 Rain Event Monitoring
Wet weather samples were collected at a frequency of once per calendar month following a rain
event of at least 0.5 inches within a 24-hour period. Composite samples for wet weather monitoring
are collected using Teledyne ISCO 6712 Full-Size Portable Samplers (the same make and model
as performance monitoring discussed above, but a dedicated set for wet weather sampling only).
The wet weather autosamplers are equipped with Teledyne 674 rain gauges that measure rainfall
depth. When rainfall exceeds 0.5 inches in a 24-hour period, the rain gauge sends a signal to the
Teledyne 6712 to begin a sampling cycle, where the autosampler collects aliquots every hour for

TR0795A 10 November 2021
24 hours. Operation, maintenance, and monitoring personnel fill sample containers and follow the
same sample collection protocols for wet weather as described in Section 3.3.1 above.
Wet weather monitoring samples were analyzed for Table 3+ PFAS, as outlined in the Interim
Seep Remediation System Plan (Geosyntec, 2020). Table 2 lists the wet weather sample collected
at Seeps A-D during the reporting period and the associated cumulative rainfall prior to the
sampling timeframe.
3.4 Deviations
Deviations for each of the data types collected are described below.
3.4.1 Transducer Monitoring Deviations
One instance of transducer downloads was unsuccessful during this reporting period:
(1) The effluent transducer data at Seep C was inadvertently overwritten during retrieval on
the November 1 O&M field event (i.e., data from October 25 through November 1 was lost
on the transducer itself). However, telemetry equipment was installed at Seep C on October
10, and was able to retrieve the majority of data during this period. A small portion (as
shown in Figure 2c) was not retrieved likely due to intermittent satellite transmission
issues.
3.4.2 Performance Monitoring and Wet Weather Sampling Deviations
The planned number of performance monitoring samples were collected at Seeps A-D per the
Interim Seep Remediation Plan (Geosyntec, 2020). Deviations in sample composite lengths are
described below.
• A GAC changeout was completed on September 9 at Seep B, interrupting the two-week
composite sample that began on September 1. A second composite sample was collected
from September 9 through 23, following the GAC changeout. A third composite sample
for the month of September was collected from September 24 through October 1 to cover
the remainder of the month.
Wet weather samples were collected at Seeps A-D per the Interim Seep Remediation Plan
(Geosyntec, 2020) with no deviations noted.

TR0795A 11 November 2021
4. RESULTS
The results for each type of data collected are described in detail in the following subsections. A
brief overview of the results is as follows:
Reporting Period
Metric Seep A Seep B Seep C Seep D Total
Duration 61 days (September 1 - October 31, 2021)
Rainfall, Actual (in) 4.20 (September 1 - October 31, 2021)
Rainfall, Historical
Average (in) 7.53 (September 1 - October 31, 2004-2020)
River Above
Spillway (days) 0 0 0 0 N/A
Operational Period (days) 61 61 61 61 N/A
Median Flow Rate (gpm) 81 113 53 84 366
Seep Volume Treated (gallons) 8,000,000 10,400,000 4,800,000 8,900,000 32,100,000
PFAS Removed
(lbs) 15.9 29.3 5.3 9.2 59.7
GAC Replaced
(lbs) 0 18,000 12,000 18,000 48,000

4.1 System Flowrates and Operational Periods
4.1.1 System Flowrate
A detailed discussion of pressure transducer water level measurements in the Effluent Stilling
Basin, and the data reduction process to convert these levels to flow rates, is provided in Sections
3.1, 3.4.1, and 4.1.1 of O&M Report #1. This data reduction process, updated for the current
reporting period, is provided in Appendix A. Figures 2A-D show the measurable flowrates through
the FTC over the reporting period for Seeps A-D, respectively.

TR0795A 12 November 2021
The flowrate statistics calculated from measurable discharge flowrates for Seeps A-D for the
current reporting period are tabulated below:
Flowrate Metric Seep A Seep B Seep C Seep D
Median Flow Rate (gpm) during
the Reporting Period 116 113 53 84
95th percentile Flow Rate (gpm)
during the Reporting Period 261 236 101 231
Design Basis Flow Rate * (gpm) 205 226 76 183
* The design basis flow rate was selected as the 95th percentile value of dry weather base flow from flume
pre-design data.
Using the measured and extrapolated flowrate calculations, approximately 8,000,000 gallons,
10,400,000 gallons, 4,800,000 gallons, and 8,900,000 gallons of water (32,100,000 gallons total)
were treated by the Seeps A, B, C, and D FTCs, respectively, from September 1 through October
31, 2021.
4.1.2 Bypass Flow
A discussion of pressure transducer water level measurements in the FTC Influent Stilling Basin
(ISB), and the data reduction process to convert these levels to the elevation of the bypass spillway,
is provided in Section 3.1, 3.4.1, and 4.1.2 of O&M Report #1. This data reduction process,
updated for the current reporting period, is provided in Appendix A.
The influent water level elevation and occurrences of bypass flow for Seeps A-D for the reporting
period are shown in Figures 3A-D. Bypass flow was more frequently observed at Seeps A and C
than at Seeps B and D. Bypass flow at Seeps A and C was caused by several days of heavy rainfall,
including September 21 (1.6 inches), October 4 (1.02 inches), and October 26 (0.53 inches). The
total rainfall received in September was approximately 2.68 inches, which is approximately half
of the historical September average (4.30 inches). The total rainfall in October was approximately
2.61 inches, approximately two-thirds the historical October average (3.24 inches). Seeps B and
D FTCs captured all wet weather flow.
4.2 Performance Monitoring Analytical Results
Analytical results for the composite performance monitoring samples are provided in Table 3 and
summarized below. Laboratory analytical results are compiled in Appendix B. A total of 34
composite samples from Seeps A-D were submitted for analytical results.
Analytical Result – Performance
Monitoring Seep A Seep B Seep C Seep D
Average Influent Total Table 3+
PFAS, 17 compounds (ng/L) 207,000 302,000 133,000 120,000

TR0795A 13 November 2021
Average Effluent Total Table 3+
PFAS, 17 compounds (ng/L) 55 182 5,895 3
Average Removal Efficiency (%) >99.9 99.9 96.8 >99.9

The Seep C result (96.8%) is due to the composite sample collected over the second half of
September (89.0%, as shown in Table 3c). This exceeds the requirements of the CO Addendum
(80%) but is less than typical. The O&M staff had operated Seep C in parallel operation mode
beginning on September 24, with both filter beds processing as Lead and no beds processing as
Lag, to respond to high flow loads from the September 21-22 rain events and develop more
freeboard below the spillway. A breakthrough sample was collected on September 27; results were
available on September 30 and indicated that there was unexpected early breakthrough of PFAS
in FB1. The suspect bed was replaced on October 1 and the operational mode was returned to
normal (FB1 Lag/FB2 Lead). Subsequent breakthrough sampling showed a return to normal
removal efficiency.
4.3 System Effectiveness
System effectiveness, defined by the percentage removal of the combined concentrations of the
three indicator parameters (HFPO-DA, PFMOAA and PMPA), is determined on a monthly
average basis for the system using volume weighted concentrations of the influent and effluent
samples. Volume weighted concentrations were developed in the event that either the influent and
effluent autosamplers have different compositing durations or that the two composite sampling
periods in the month have different durations (e.g., 14 days and 10 days). Both circumstances could
arise due to a potential equipment malfunction or severe weather event. Weighting by volume
provides a representative assessment of mass present in both the influent and effluent over time;
samples corresponding to greater flow volumes will have a proportionately higher weight. System
effectiveness is calculated using the equation presented in Section 4.3 of the O&M Report #1.
Based on the system flowrate data (Section 4.1.1) and the performance monitoring composite
sample data of the three indicator compounds (Section 4.2), the overall system effectiveness for
Seeps A-D was calculated to be 98.9%. The system effectiveness for the individual Seeps is
presented below:
System
Effectiveness
Seep A Seep B Seep C Seep D Overall
Average Sep Oct Sep Oct Sep Oct Sep Oct
% 99.97 99.99 99.90 99.92 93.03 98.75 100 >99.99 98.94

4.4 Wet Weather Sampling Results
Wet weather monitoring samples (September 22 or 23, and October 10 or 26) were collected at
Seeps A-D during the reporting period (Table 2), and their analytical results are shown in Table 4

TR0795A 14 November 2021
and summarized below. Laboratory analytical results are compiled in Appendix B. As noted in
Paragraph 2(a)(iii) in the CO Addendum, these results are not to be used to determine compliance
under Paragraph 2(a)(vi).
Analytical Result – Wet Weather
Monitoring Seep A Seep B Seep C Seep D
Average Influent Total Table 3+
PFAS, 17 compounds (ng/L) 156,000 205,600 98,000 87,600
Average Effluent Total Table 3+
PFAS, 17 compounds (ng/L) 30 137 604 3
Average Removal Efficiency (%) >99.9 99.9 99.3 >99.9

4.5 River Elevation and Precipitation
The Cape Fear River was monitored using the existing USGS weather monitoring station at the
W.O. Huske Dam (gage 02105500), as described in Section 3.2.
Three key river elevations, in reference to the FTC at Seeps A-D were monitored for their effect
on system performance:
(i) When the river rises above the top of the GAC, head differentials throughout the FTC
are reduced and flow through the system is hindered.
(ii) When the river rises above the invert of the Bypass Spillway, the influent and effluent
water elevation are equal and flow through the system ceases.
(iii) When the river rises above the top of the FTC walls, maintenance is required to repair
any damages from flooding.
A statistical summary of the Cape Fear River elevation relative to these key elevations is provided
in Table 5. The Cape Fear River did not rise above the elevation level of any key features (GAC,
wall, spillway, discharge pipe) of any FTCs during the reporting period, except above the discharge
pipe at Seep A for approximately 2 days. The changes in elevation of the Cape Fear River during
the reporting period (September 1 through October 31, 2021) are shown in Figure 1. For clarity of
presentation, Figure 1 shows the key FTC elevations at Seep C only.
4.6 Water Quality
The water quality measurements collected during reporting period are provided in Table 6 and
described below:
• DO: No significant differences were observed in the fluctuations of DO between influent
and effluent locations in Seeps A, B, and C. In Seep D, the DO level increased on a median
basis by 1.1 mg/L. The minimum average effluent DO across all four FTCs was 5.6 mg/L,

TR0795A 15 November 2021
indicating that aerobic conditions are maintained during the process. The FTC systems do
not involve biological activity to treat influent water, therefore, DO is not expected to
decrease or increase significantly over the system’s residence time.
• Temperature: At all four seeps, the median temperature of the influent was within 5% of
the median temperature of the effluent during this reporting period. Due to the relatively
short residence time in the FTC, temperature is not expected to change significantly
throughout the FTC.
• Specific Conductance: Similar to the above parameters, there appeared to be only a minor
effect on conductivity. The FTC is expected to have little effect on the anion/cation content
of the seep baseflow. For all four Seeps, the difference in median specific conductance
across influent and effluent locations ranged between −27.5 and 10.2 uS/cm.
• pH: From the IC to the ESB, the median pH of treated water increased for all four Seeps.
The increase in median pH from the IC to the ESB across the Seeps was between 0.4 and
1.2 Standard Units. This effect was anticipated and is likely a result of the inflow’s contact
with the concrete walls of the FTC and the GAC in the filter beds.
• Turbidity and TSS: The median turbidity of the influent water at Seeps A, B, C, and D
ranged from 3.5 to 47.2 NTU. The FTCs significantly decreased the turbidity of the influent
water. The decrease in median turbidity across all four Seeps was at least 82%. The TSS
was observed to be 0.0 mg/L for all influent and effluent monitoring locations.
4.7 GAC Usage
At Seep B, 18,000 lbs of GAC was replaced in FB1. At Seep C, 6,000 lbs of GAC was replaced
in FB1 and 6,000 lbs of GAC was replaced in FB2. At Seep D, 18,000 lbs of GAC were replaced
at FB1. No GAC was replaced at Seep A during the reporting period.

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5. SUMMARY
The following summarizes the FTC’s performance after the completion of the latest reporting
period (September 1 through October 31, 2021):
• Conclusions reached from the previous months of operation, as documented in previous
O&M Reports, remain unchanged. Flow data from Seeps A, B, C, and D indicate the
systems are capable of treating more than the design basis flow rate under favorable
hydraulic conditions. Wet weather flow is frequently captured, in some cases fully
captured, and treated equally to dry weather flows when captured.
• Performance monitoring results indicate the PFAS removal efficiency of captured baseflow
at Seeps A-D ranges from 96.8 to >99.9%. To date, the A-D FTCs have prevented
approximately 180.7 lbs of PFAS from being discharged to the Cape Fear River.
The next reporting period (November 1 through December 31, 2021) will be detailed in O&M
Report #6, to be submitted no later than January 31, 2021. Additionally, the overall scope of O&M
activities will continue to be evaluated, and a modification may potentially be proposed after six
months of operation at all four systems, as permitted under Paragraph 2(a)(iv).

TR0795A 17 November 2021
6. REFERENCES
AECOM, 2018. Poly and Perfluoroalkyl Substance Quality Assurance Project Plan. August 2018.
Geosyntec, 2020. Interim Seep Remediation System Plan. Chemours Fayetteville Works. 31
August 2020.
Geosyntec, 2021a. Interim Seep Remediation Operation and Maintenance Report #1. Chemours
Fayetteville Works. 31 March 2021.
Geosyntec, 2021b. Interim Seep Remediation Operation and Maintenance Report #2. Chemours
Fayetteville Works. 31 May 2021.
Geosyntec, 2021c. Interim Seep Remediation Operation and Maintenance Report #3. Chemours
Fayetteville Works. 30 July 2021.
Geosyntec, 2021d. Interim Seep Remediation Operation and Maintenance Report #4. Chemours
Fayetteville Works. 30 September 2021.

TR0795A
TABLES

Table 1a
Summary of Operations and Maintenance Activities - Seep A
Reporting Period 5 (September - October 2021)
Chemours Fayetteville Works
Fayetteville, North Carolina
FB1 FB2 FB1 FB2 Transducers
Downloaded Maintenance Activities Completed Notes
Operational Mode
Arrival DepartureDays Since
Startup
Bypass
Spillway
Flow?
Sampling Performed
Date
Breakthrough
Monitoring
Performance
Monitoring
Wet Weather
Monitoring
09/02/2021 128 No Lead Lag Lead Lag Skimmed and fluffed FB1.4 inches of freeboard pre-service.
09/03/2021 129 No Lead Lag Lead Lag Adjusted valves to maintain FB1 in lead and FB2 in lag.Reservoir basin drawdown. Greater than 12 inch of freeboard.
09/07/2021 133 No X Lead Lag Lead Lag X N/A
GAC accumulation observed in effluent stilling basin. Concrete spalling on
influent and effluent side of the Seep. 18 inches of freeboard. Effluent
datalogger pipe connector broke and dropped datalogger and chain to
bottom of pipe.
09/09/2021 135 No Lead Lag Lead Lag N/A Post-storm inspection. Rain gauge reading of 0.6 inches. 10 inches of
freeboard.
09/10/2021 136 No Lead Lag Lead Lag
Skimmed, fluffed, and placed new fabric in FB1. Flushed inlet basin.
Removed GAC from effluent stilling basin. Recovered and repaired
datalogger.
Concrete spalling on influent and effluent sides. Rain gauge reading of 1/16
inches. 12 inches of freeboard.
09/13/2021 139 No X Lead Lag Lead Lag X N/A N/A
09/16/2021 142 --X Lead Lag Lead Lag N/A N/A
09/17/2021 143 No Lead Lag Lead Lag Skimmed, fluffed, and replaced fabric in FB1. Flushed influent stilling basin.
Dewatered FB1 and influent stilling basin to conduct maintenance.N/A
09/20/2021 146 No X Lead Lag Lead Lag X N/A 18 inches of freeboard.
09/22/2021 148 No X Lead Lag Lead Lag NA Bypassed during the night. Rain gauge reading of 1 and 7/8 inches.
09/23/2021 149 Yes Lead Lag Lead Lag N/A Rain gauge reading of 2 and 1/16 inches.
09/24/2021 150 Yes Lead Lag Lead Lag Wet vacuumed FB1. Water level in reservoir basin was high.
09/27/2021 153 Yes X Lead Lag Closed Lead X Started to skim and hard rake FB1. Left FB2 as sole processor during
maintenance of FB1.N/A
09/28/2021 154 No Closed Lead Lead Lag Skimmed, fluffed, and replaced fabric in FB1. FB2 was sole processor to
dewater FB1 for maintenance. Flushed influent.13 inches of freeboard.
10/04/2021 160 No X X Lead Lag Lead Lag X N/A N/A
10/05/2021 161 Yes Lead Lag Lead Lag Vacuumed FB2. W3 was raised 0.5 inches.Rain gauge reading of 0.9 inches.
10/08/2021 164 No Lead Lag Lead Lag Wet vacuumed FB1. FB2 utilized as lead for 4 hours.Stormwater from rain events filled the reservoir and kept the water levels
high in the influent basin.
10/11/2021 167 Yes X Lead Lag Lead Lag X N/A Rain gauge reading of 0.6 inches.
10/12/2021 168 Yes Lead Lag Lead Lag Skimmed, fluffed, and replaced fabric in FB1. Flushed inlet stilling basin.Stopped bypassing after service.
10/14/2021 170 No Lead Lag Lead Lag Vacuumed FB2.7.5 inches of freeboard.
10/15/2021 171 No X Lead Lag Lead Lag N/A 7 inches of freeboard.
10/18/2021 174 No X Lead Lag Lead Lag X N/A N/A
10/19/2021 175 Yes Lead Lag Lead Lag Vacuumed and fluffed FB1 and FB2. Dewatered beds to conduct
maintenance.N/A
10/22/2021 178 --X Lead Lag Lead Lag Flushed inlet basin. Vacuumed, fluffed, and replaced fabric at FB1.N/A
10/25/2021 181 No X Lead Lag Lead Lag X N/A 16 inches of freeboard. Spillway wet from last week.
10/26/2021 182 No Lead Lag Lead Lag N/A Rain gauge reading of 0.5 inches. 7 inches of freeboard.
10/28/2021 184 No Lead Lag Lead Lag Wet vacuumed top of fabric at FB1.5.5 inches of freeboard.
10/29/2021 185 Yes X Lead Lag Lead Lag Wet vacuumed FB1. Rain gauge reading of 0.6 inches.
Notes
FB1 - Filter Bed 1
FB2 - Filter Bed 2
FTC - flow through cell
GAC - granulated activated carbon
ISCO - Teledyne ISCO Autosampler
mm - millimeters
N/A - Not Applicable
TR0795A Page 1 of 4 November 2021
Table 1b
Summary of Operations and Maintenance Activities - Seep B
Reporting Period 5 (September - October 2021)
Chemours Fayetteville Works
Fayetteville, North Carolina
FB1 FB2 FB1 FB2 Transducers
Downloaded Maintenance Activities Completed Notes
Breakthrough
Monitoring
Performance
Monitoring
Wet Weather
Monitoring
ArrivalDays Since
Startup
Bypass Spillway
Flow?
Sampling Performed Operational Mode
Departure
Date
09/02/2021 87 --Lead Lag Parallel Parallel Valves switched to parallel.N/A
09/03/2021 88 No Parallel Parallel Lead Lag Valves switched to FB1 lead and FB2 lag.N/A
09/07/2021 92 No X Lead Lag Lag Lead X N/A Concrete sides are settling and forming gaps. Secondary bypass on NE end of
Seep.
09/09/2021 94 No X Changeout Lead Lag Lead Installed GAC in FB1 and wet vacuumed FB2.N/A
09/13/2021 98 No X Lag Lead Lag Lead X N/A Appeared to be bacteria mat across the top surface of FB1.
09/16/2021 101 No Lag Lead Lag Lead
Skimmed, fluffed, and installed new fabric in FB2. Adjusted valves to
dewater FB2. Flushed and removed 6 inches of gravel from inlet basin.
Installed inlet weir in order to flush inlet basin.
Raised height of datalogger in influent stilling basin by 3.5 inches.
09/20/2021 105 No X Lag Lead Lag Lead X N/A 12 inches of freeboard.
09/22/2021 107 No X Lag Lead Lag Lead N/A Bypassed overnight.
09/23/2021 108 No Lag Lead Lag Lead N/A Rain gauge reading of 2 inches.
09/24/2021 109 No X Lag Lead Lag Lead Wet vacuumed FB2. Water was in spillway, but was not bypassing. Water was high and murky in
FBs. Influent ISCO missed one aliquot (#28).
09/27/2021 112 No X Lag Lead Lag Lead N/A N/A
09/28/2021 113 No Lag Lead Lag Lead X N/A N/A
09/29/2021 114 No Lag Lead Lag Lead Skimmed and fluffed FB2. Flushed inlet basin.No freeboard, but not bypassing.
10/01/2021 116 No X Lag Lead Lag Lead N/A 12 inches of freeboard.
10/04/2021 119 No X Lag Lead Lag Lead X N/A N/A
10/05/2021 120 No Lag Lead Lag Lead N/A Evidence of bypass in spillway. 2 inches of freeboard. Rain gauge reading of
1.1 inches.
10/07/2021 122 No Lag Lead Lag Lead Vacuumed FB2.Water flow observed north of flow through cell outlet.
10/11/2021 126 No X Lag Lead Lag Lead X N/A No evidence of bypass in the spillway. Rain gauge reading of 13 mm.
10/13/2021 128 No Lag Lead Lag Lead FB2 maintenance. Isolated FB2 for maintenance.Secondary bypass on northeast end of Seep.
10/15/2021 130 No X Lag Lead Lag Lead Wet vacuumed FB1. Adjusted valve to allow more water to enter lag bed for
maintenance.11 inches of freeboard.
10/18/2021 133 No X Lag Lead Lag Lead X N/A 8.5 inches of freeboard. Secondary bypass on northeast end of Seep.
10/20/2021 135 No Lag Lead Lag Lead Skimmed and fluffed FB1 and FB2.6.5 inches of freeboard.
10/22/2021 137 --X Lag Lead Lag Lead N/A N/A
10/25/2021 140 No X Lag Lead Lag Lead X N/A 9.5 inches of freeboard. Flow observed at north slope of outlet.
10/26/2021 141 No Lag Lead Lag Lead Inlet basin isolated. Administered biocide to lead bed. Wet vacuumed FB2.N/A
10/27/2021 142 No X Lag Lead Lag Lead N/A 9 inches of freeboard. Secondary bypass on northeast end.
10/29/2021 144 No X Lag Lead Lag Lead Wet vacuumed FB2. 4 inches of freeboard. Rain gauge reading of 0.5 inches. Secondary bypass on
northeast end.
Notes
FB1 - Filter Bed 1
FB2 - Filter Bed 2
FTC - flow through cell
GAC - granulated activated carbon
ISCO - Teledyne ISCO Autosampler
mm - millimeters
N/A - Not Applicable
TR0795A Page 2 of 4 November 2021
Table 1c
Summary of Operations and Maintenance Activities - Seep C
Reporting Period 5 (September - October 2021)
Chemours Fayetteville Works
Fayetteville, North Carolina
FB1 FB2 FB1 FB2Performance
Monitoring
Wet Weather
Monitoring
Arrival Departure
Operational Mode
Transducers
DownloadedDate
Bypass Spillway
Flow?
Sampling Performed
Days Since
Startup Maintenance Activities Completed Notes
Breakthrough
Monitoring
09/01/2021 260 No Lead Lag Lead Lag FB1 and influent stilling basin maintenance.N/A
09/02/2021 261 --Lead Lag Parallel Parallel N/A N/A
09/03/2021 262 No Lead Lag Lead Lag Valve adjustment.N/A
09/07/2021 266 No X Lead Lag Lead Lag X N/A N/A
09/09/2021 268 No Lead Lag Lead Lag N/A Post-storm inspection. Less than half an inch of freeboard. Rain gauge reading between 9/16 and 5/8 inches.
09/13/2021 272 No X Lead Lag Lead Lag X N/A N/A
09/16/2021 275 --X --------N/A N/A
09/20/2021 279 No X Lead Lag Lead Lag X N/A 9 inches of freeboard.
09/22/2021 281 Yes Lead Lag Lead Lag N/A Rain gauge reading of 2.25 inches. Effluent sample only collected 1-9
samples. Grab sample collected in the effluent.
09/23/2021 282 Yes X Lead Lag Lead Lag N/A Rain gauge reading of 2 inches.
09/24/2021 283 Yes Lead Lag Parallel Parallel Wet vacuumed FB1 and FB2. Water in FB2 was high and murky.
09/27/2021 286 No X Parallel Parallel Parallel Parallel N/A 4.5 inches of freeboard.
09/28/2021 287 No Parallel Parallel Parallel Parallel X N/A N/A
09/30/2021 289 No Parallel Parallel Changeout Lead
Removed sand and spent fabric from inlet. Flushed inlet basins. Trimmed
datalogger casing and reset dataloggers height and telemetry height to 35.5
inches from top of casing. Isolated FB1 for removal of spent GAC.
N/A
10/01/2021 290 No X Changeout Lead Lag Lead FB1 GAC changeout.During GAC changeout, noted unknown layer of sediment 12 inches from
bottom of cell.
10/04/2021 293 No Lag Lead Lag Lead X N/A N/A
10/05/2021 294 Yes Lag Lead Lag Lead N/A Impoundment water very turbid from storm water runoff. Rain gauge reading
of 1.125 inches.
10/07/2021 296 Yes Lag Lead Lag Lead Wet vacuumed FB2.Silt flow from uphill construction. Stopped bypassing after service.
10/11/2021 300 Yes X Lag Lead Lag Lead X N/A Rain gauge reading of 12 mm.
10/12/2021 301 Yes Lag Lead Lag Lead Wet vacuumed and fluffed FB2. FB1 used as sole processor during
maintenance of FB2.
High turbidity observed in the reservoir basin from recent rain. GAC
observed at bottom of effluent basin.
10/15/2021 304 No X Lead Closed Lead Closed Vacuumed FB2. Removed matting and bricks.11 inches of freeboard.
10/18/2021 307 --Lead Changeout Lead Lag FB2 GAC changeout.N/A
10/19/2021 308 No Lead Lag Lead Lag Wet vacuumed FB1. FB1 intake shutoff for 3.5 hours. Turbid water.
10/21/2021 310 No Lead Lag Lead Lag Skimmed, fluffed, raked, and replaced fabric at FB1. FB1 dewatered for
maintenance.N/A
10/22/2021 311 --X Lead Lag Lead Lag N/A N/A
10/25/2021 314 No X Lead Lag Lead Lag X N/A 7.5 inches of freeboard.
10/26/2021 315 No Lead Lag Lead Lag Wet vacuumed FB1 and FB2.Rain gauge reading of 5/8 inches. No freeboard.
10/27/2021 316 No X Lead Lag Lead Lag N/A N/A
10/29/2021 318 No X Lead Lag Lead Lag N/A Reservoir appeared turbid.
Notes
FB1 - Filter Bed 1
FB2 - Filter Bed 2
FTC - flow through cell
GAC - granulated activated carbon
ISCO - Teledyne ISCO Autosampler
mm - millimeters
N/A - Not Applicable
TR0795A Page 3 of 4 November 2021
Table 1d
Summary of Operations and Maintenance Activities - Seep D
Reporting Period 5 (September - October 2021)
Chemours Fayetteville Works
Fayetteville, North Carolina
FB1 FB2 FB1 FB2Date
Days Since
Startup
Bypass Spillway
Flow?
Sampling Performed
Breakthrough
Monitoring
Performance
Monitoring
Wet Weather
Monitoring
Arrival Departure Transducers
Downloaded
Operational Mode
Maintenance Activities Completed Notes
09/02/2021 71 --Lead Lag Parallel Parallel Valves positioned to parallel processing. N/A
09/07/2021 76 No X Lead Lag Lead Lag X Pumped down inlet basin. Removed sand and replaced fabric.2 inches of freeboard. Bacteria present under fabric and inlet basin.
09/09/2021 78 No Lead Lag Lead Lag N/A Influent ISCO had intact tubing loose and missed 32-34 sample aliquots.
Rain gauge reading of 3/4 inches. 1 inch of freeboard.
09/13/2021 82 No X Lead Lag Lead Lag X N/A N/A
09/16/2021 85 No X Lead Lag Lead Lag N/A N/A
09/20/2021 89 No X Lead Lag Lead Lag X N/A N/A
09/21/2021 90 No Lead Lag Lead Lag Flushed inlet basin and wet vacuumed FB1 surface. Temporarily installed W1
and isolated FB1. Reversed after 2.5 hours.N/A
09/22/2021 91 No Lead Lag Lead Lag N/A Rain gauge reading of 2.75 inches. 14 inches of freeboard. Influent sampled
missed aliquot #2.
09/23/2021 92 No X Lead Lag Lead Lag N/A Rain gauge reading of 2.75 inches. 11 inches of freeboard.
09/27/2021 96 No X Lead Lag Closed Lead X Dewatered FB1 for maintenance.3 inches of freeboard.
09/28/2021 97 No Closed Lead Lead Lag Skimmed, fluffed, and added new fabric in FB1. Flushed inlet basin.15 inches of freeboard. Bacteria growth on FB1.
10/01/2021 100 No X Lead Lag Lead Lag N/A 12 inches of freeboard.
10/04/2021 103 No X Lead Lag Lead Lag X N/A N/A
10/05/2021 104 No Lead Lag Lead Lag N/A Rain gauge reading of 1.25 inches. Impoundment turbid from storm runoff.
Signs of heavy runoff along gravel road above Seep D.
10/06/2021 105 No Lead Lag Lead Lag Wet vacuumed FB1.Turbid water in FB1 from 10/04/2021 rain event. Flow increased immediately
after wet vacuuming.
10/11/2021 110 No X Lead Lag Lead Lag X N/A Rain gauge reading of 17 mm.
10/13/2021 112 No Lead Lag Lead Lag Skimmed, fluffed, and added new fabric in FB1.2 inches of freeboard.
10/15/2021 114 No X Lead Lag Lead Lag N/A More than 7 inches of freeboard.
10/18/2021 117 No X Lead Lag Lead Lag X N/A 8.5 inches of freeboard. Secondary bypass at northeast end of Seep. Strong
sewage odor noted at Seep.
10/21/2021 120 No Lead Lag Lead Lag Vacuumed and fluffed FB1. Skimmed and fluffed FB2. Replaced fabric on
both FB1 and FB2.N/A
10/22/2021 121 --X Lead Lag Lead Lag N/A N/A
10/25/2021 124 No X Lead Lag Lead Lag X N/A
Water observed flowing through downgradient riprap slope on northeast side
of dam. Iron staining observed on rocks above discharge pipe. Yellowish hue
in reservoir.
10/26/2021 125 No Lead Lag Changeout Lead Carbon changeout at FB1. FB2 was turned on as primary processor at 1600.Rain gauge reading of 0.5 inches. 6 inches of freeboard.
10/27/2021 126 No X Changeout Lead Changeout Lead N/A N/A
10/29/2021 128 No X Lag Lead Lag Lead N/A Rain gauge reading of 0.5 inches. 15 inches of freeboard.
Notes
FB1 - Filter Bed 1
FB2 - Filter Bed 2
FTC - flow through cell
GAC - granulated activated carbon
ISCO - Teledyne ISCO Autosampler
mm - millimeters
N/A - Not Applicable
W1 - Weir 1
TR0795A Page 4 of 4 November 2021
Table 2a
Sampling Summary - Seep A
Reporting Period 5 (September - October 2021)
Chemours Fayetteville Works
Fayetteville, North Carolina
Sample ID Composite Period
SEEP-A-INFLUENT-336-091421
SEEP-A-EFFLUENT-336-091421
SEEP-A-INFLUENT-252-100121
SEEP-A-EFFLUENT-336-100121
SEEP-A-INFLUENT-336-101521
SEEP-A-EFFLUENT-336-101521
SEEP-A-INFLUENT-336-102921
SEEP-A-EFFLUENT-336-102921
Sample ID Sample Date Sample Time Cumulative Rainfall
(inches)
SEEP-A-INFLUENT-RAIN-24-092221
SEEP-A-EFFLUENT-RAIN-24-092221
SEEP-A-INFLUENT-RAIN-24-101021
SEEP-A-EFFLUENT-RAIN-24-101021
Notes
1 Sample Identification Label Key: "Seep - [A, B, C, or D] - [Sample Location Inside FTC] - [# of Aliquots in Composite Sample] - [MMDDYY]"
2 Precipitation data obtained from the USGS gauge #02105500 at the William O. Huske Lock and Dam.
September 17 - October 1, 2021 October 1, 2021
October 1 - October 15, 2021 October 15, 2021
October 15 - October 29, 2021
September 14, 2021
October 29, 2021
Wet Weather Composite Sample
September 1 - September 14, 2021
September 22, 2021 09:02 1.69
October 10, 2021 14:15 0.35
Performance Monitoring Composite Samples
Sample Date
TR0795A Page 1 of 4 November 2021
Table 2b
Sampling Summary - Seep B
Reporting Period 5 (September - October 2021)
Chemours Fayetteville Works
Fayetteville, North Carolina
Sample ID Composite Period
SEEP-B-INFLUENT-210-090921
SEEP-B-EFFLUENT-210-090921
SEEP-B-INFLUENT-330-092321
SEEP-B-EFFLUENT-336-092321
SEEP-B-INFLUENT-168-100121
SEEP-B-EFFLUENT-168-100121
SEEP-B-INFLUENT-336-101521
SEEP-B-EFFLUENT-336-101521
SEEP-B-INFLUENT-198-102921
SEEP-B-EFFLUENT-336-102921
Sample ID Sample Date Sample Time Cumulative Rainfall
(inches)
SEEP-B-INFLUENT-RAIN-24-092221
SEEP-B-EFFLUENT-RAIN-24-092221
SEEP-B-INFLUENT-RAIN-16-102621
SEEP-B-EFFLUENT-RAIN-24-102621
Notes
1
2 Sample Identification Label Key: "Seep - [A, B, C, or D] - [Sample Location Inside FTC] - [# of Aliquots in Composite Sample] - [MMDDYY]"
3 Precipitation data for the September 22 sample was obtained from the USGS gauge #02105500 at the William O. Huske Lock and Dam.
4 Precipitation data for the October 26 sample was obtained from telemetry rain gauge data at Seep A. Seep B telemetry equipment is expected to be
installed in November 2021.
A GAC changeout was completed on September 9, interrupting the two-week compostie sample that began on September 1. A second composite
sample was collected from September 9 through 23, following the GAC changeout. A third composite sample for the month of September was
collected from September 24 through October 1 to cover the remainder of the month.
Wet Weather Composite Sample
Performance Monitoring Composite Samples
Sample Date
September 1 - September 9, 2021 September 9, 2021
September 9 - September 23, 2021 September 23, 2021
September 24 - October 1, 2021 October 1, 2021
October 1 - October 15, 2021 October 15, 2021
October 26, 2021 23:21 0.54
September 22, 2021 10:05 1.69
October 15 - October 29, 2021 October 29, 2021
TR0795A Page 2 of 4 November 2021
Table 2c
Sampling Summary - Seep C
Reporting Period 5 (September - October 2021)
Chemours Fayetteville Works
Fayetteville, North Carolina
Sample ID Composite Period
SEEP-C-INFLUENT-336-091421
SEEP-C-EFFLUENT-336-091421
SEEP-C-INFLUENT-330-100121
SEEP-C-EFFLUNT-336-100121
SEEP-C-INFLUENT-336-101521
SEEP-C-EFFLUENT-336-101521
SEEP-C-INFLUENT-336-102921
SEEP-C-EFFLUENT-336-102921
Sample ID Sample Date Sample Time Cumulative Rainfall
(inches)
SEEP-C-INFLUENT-RAIN-24-092321
SEEP-C-EFFLUENT-RAIN-24-092321
SEEP-C-INFLUENT-RAIN-21-102621
SEEP-C-EFFLUENT-RAIN-16-102621
Notes
1 Sample Identification Label Key: "Seep - [A, B, C, or D] - [Sample Location Inside FTC] - [# of Aliquots in Composite Sample] - [MMDDYY]"
2 Precipitation data for the September 23 sample was obtained from the USGS gauge #02105500 at the William O. Huske Lock and Dam.
3 Precipitation data for the October 26 sample was obtained from telemetry rain gauge data at Seep C.
September 23, 2021 14:15 0.39
October 26, 2021 23:00 0.54
October 1 - October 15, 2021 October 15, 2021
September 17 - October 1, 2021 October 1, 2021
October 15 - October 29, 2021 October 29, 2021
Wet Weather Composite Sample
Sample Date
Performance Monitoring Composite Samples
September 1 - September 14, 2021 September 14, 2021
TR0795A Page 3 of 4 November 2021
Table 2d
Sampling Summary - Seep D
Reporting Period 5 (September - October 2021)
Chemours Fayetteville Works
Fayetteville, North Carolina
Sample ID Composite Period
SEEP-D-INFLUENT-318-091421
SEEP-D-EFFLUENT-336-091421
SEEP-D-INFLUENT-336-100121
SEEP-D-EFFLUENT-330-100121
SEEP-D-INFLUENT-282-101521
SEEP-D-EFFLUENT-336-101521
SEEP-D-INFLUENT-336-102921
SEEP-D-EFFLUENT-336-102921
Sample ID Sample Date Sample Time Cumulative Rainfall
(inches)
SEEP-D-INFLUENT-RAIN-24-092321
SEEP-D-EFFLUENT-RAIN-24-092321
SEEP-D-INFLUENT-RAIN-21-102621
SEEP-D-EFFLUENT-RAIN-24-102621
Notes
1 Sample Identification Label Key: "Seep - [A, B, C, or D] - [Sample Location Inside FTC] - [# of Aliquots in Composite Sample] - [MMDDYY]"
2 Precipitation data for the September 23 sample was obtained from the USGS gauge #02105500 at the William O. Huske Lock and Dam.
3 Precipitation data for the October 26 sample was obtained from telemetry rain gauge data at Seep C. Seep D telemetry equipment is expected to be
installed in November 2021.
September 1 - September 14, 2021 September 14, 2021
October 26, 2021 23:01 0.54
September 17 - October 1, 2021 October 1, 2021
October 1 - October 15, 2021 October 15, 2021
Sample Date
Performance Monitoring Composite Samples
Wet Weather Composite Sample
October 15 - October 29, 2021 October 29, 2021
September 23, 2021 0.7911:13
TR0795A Page 4 of 4 November 2021
Table 3a
Summary of Performance Monitoring Analytical Results - Seep A
Reporting Period 5 (September - October 2021)
Chemours Fayetteville Works
Fayetteville, NC
SEEP-A-INFLUENT-
336-091421
SEEP-A-EFFLUENT-
336-091421
SEEP-A-INFLUENT-
252-100121
SEEP-A-EFFLUENT-
336-100121
SEEP-A-INFLUENT-
336-101521
SEEP-A-EFFLUENT-
336-101521
SEEP-A-INFLUENT-
336-102921
SEEP-A-EFFLUENT-
336-102921
Sample Date:Sample Date:Sample Date:Sample Date:Sample Date:Sample Date:Sample Date:Sample Date:
14-Sep-21 14-Sep-21 1-Oct-21 1-Oct-21 15-Oct-21 15-Oct-21 29-Oct-21 29-Oct-21
Hfpo Dimer Acid 25,000 7.6 >99.9%32,000 4.6 >99.9%25,000 2.9 >99.9%25,000 2.5 >99.9%PFMOAA 75,000 74 99.9%76,000 27 >99.9%68,000 23 >99.9%72,000 12 >99.9%
PFO2HxA 45,000 16 >99.9%43,000 7.5 >99.9%43,000 5.8 >99.9%41,000 4.9 >99.9%
PFO3OA 17,000 3.4 >99.9%14,000 <2.0 100.0%16,000 <2.0 100.0%16,000 <2.0 100.0%
PFO4DA 7,600 <2.0 100.0%7,700 <2.0 100.0%8,800 <2.0 100.0%7,500 <2.0 100.0%
PFO5DA 4,800 <2.0 100.0%4,000 <2.0 100.0%4,800 <2.0 100.0%3,700 <2.0 100.0%
PMPA 22,000 28 99.9%20,000 <10 100.0%20,000 <10 100.0%18,000 <10 100.0%
PEPA 8,800 <20 100.0%7,400 <20 100.0%7,200 <20 100.0%6,800 <20 100.0%PS Acid 3,900 <2.0 100.0%4,600 <2.0 100.0%4,800 <2.0 100.0%3,400 <2.0 100.0%Hydro-PS Acid 1,400 <2.0 100.0%1,600 <2.0 100.0%1,600 <2.0 100.0%1,700 <2.0 100.0%R-PSDA 2,300 J <2.0 100.0%2,700 J <2.0 100.0%2,300 J <2.0 100.0%2,600 J <2.0 100.0%Hydrolyzed PSDA 26,000 J 6.3 J >99.9%28,000 J 2.6 J >99.9%27,000 J <2.0 100.0%30,000 J <2.0 100.0%R-PSDCA 51 <2.0 100.0%48 <2.0 100.0%52 <2.0 100.0%51 <2.0 100.0%NVHOS, Acid Form 1,200 <2.0 100.0%1,300 <2.0 100.0%1,100 <2.0 100.0%1,300 <2.0 100.0%
EVE Acid 500 <2.0 100.0%620 <2.0 100.0%530 <2.0 100.0%390 <2.0 100.0%
Hydro-EVE Acid 1,800 <2.0 100.0%1,900 <2.0 100.0%1,600 <2.0 100.0%1,700 <2.0 100.0%
R-EVE 1,100 J <2.0 100.0%1,100 J <2.0 100.0%1,100 J <2.0 100.0%1,200 J <2.0 100.0%
PES <6.7 <2.0 100.0%<6.7 <2.0 100.0%<6.7 <2.0 100.0%<6.7 <2.0 100.0%
PFECA B <27 <2.0 100.0%<27 <2.0 100.0%<27 <2.0 100.0%<27 <2.0 100.0%
PFECA-G <48 <2.0 100.0%<48 <2.0 100.0%<48 <2.0 100.0%<48 <2.0 100.0%
Total Table 3+ (17 compounds)1,2 210,000 130 99.9%210,000 39 >99.9%200,000 32 >99.9%200,000 19 >99.9%
Total Table 3+ (20 compounds)1 240,000 140 99.9%250,000 42 >99.9%230,000 32 >99.9%230,000 19 >99.9%
Notes
1 - Total Table 3+ was calculated including J qualified data but not non-detect data. The total Table 3+ sum is rounded to two significant figures.
2 - Total Table 3+ (17 Compounds) does not include R-PSDA, Hydrolyzed PSDA and R-EVE.Bold - Analyte detected above associated reporting limit.J - Analyte detected. Reported value may not be accurate or precise.ng/L - nanograms per literQA/QC - Quality assurance/ quality controlSOP - standard operating procedure
< - Analyte not detected above associated reporting limit.
ND - No Table 3+ compounds were detected above their associated reporting limits.
Sample Identification Label Key: "Seep - [A, B, C, or D] - [Sample Location Inside FTC] - [# of Aliquots in Composite Sample] - [MMDDYY]"
Percent Removal Percent Removal
Table 3 + SOP (ng/ L)
Percent Removal Percent Removal
TR0795A Page 1 of 5 November 2021
Table 3b
Summary of Performance Monitoring Analytical Results - Seep B
Reporting Period 5 (September - October 2021)
Chemours Fayetteville Works
Fayetteville, NC
SEEP-B-INFLUENT-
210-090921
SEEP-B-EFFLUENT-
210-090921
SEEP-B-INFLUENT-
330-092321
SEEP-B-EFFLUENT-
336-0923321
SEEP-B-INFLUENT-
168-100121
SEEP-B-EFFLUENT-
168-100121
SEEP-B-INFLUENT-
336-101521
SEEP-B-EFFLUENT-
336-101521
Sample Date:Sample Date:Sample Date:Sample Date:Sample Date:Sample Date:Sample Date:Sample Date:
9-Sep-21 9-Sep-21 23-Sep-21 23-Sep-21 1-Oct-21 1-Oct-21 15-Oct-21 15-Oct-21
Hfpo Dimer Acid 21,000 2.6 >99.9%50,000 30 99.9%66,000 17 >99.9%32,000 8.7 >99.9%
PFMOAA 92,000 2.3 >99.9%180,000 260 99.9%170,000 100 99.9%80,000 76 99.9%
PFO2HxA 34,000 <2.0 100.0%68,000 39 99.9%66,000 14 >99.9%37,000 9.4 >99.9%
PFO3OA 8,600 <2.0 100.0%16,000 5.3 >99.9%16,000 2 >99.9%9,100 <2.0 100.0%
PFO4DA 1,400 <2.0 100.0%2,700 <2.0 100.0%2,900 <2.0 100.0%1,900 <2.0 100.0%
PFO5DA 150 <2.0 100.0%340 <2.0 100.0%480 <2.0 100.0%360 <2.0 100.0%
PMPA 25,000 <10 100.0%52,000 130 99.8%71,000 61 99.9%41,000 40 99.9%
PEPA 9,900 <20 100.0%24,000 35 99.9%34,000 <20 100.0%19,000 <20 100.0%
PS Acid 560 <2.0 100.0%1,800 <2.0 100.0%2,200 <2.0 100.0%1,900 <2.0 100.0%
Hydro-PS Acid 620 <2.0 100.0%1,500 <2.0 100.0%1,900 <2.0 100.0%1,000 <2.0 100.0%
R-PSDA 3,900 J <2.0 100.0%5,100 J 4.3 J 99.9%7,100 J <2.0 100.0%4,100 J <2.0 100.0%
Hydrolyzed PSDA 32,000 J <2.0 100.0%42,000 J 23 J 99.9%54,000 J 6.2 J >99.9%30,000 J 3.6 J >99.9%
R-PSDCA 40 <2.0 100.0%86 <2.0 100.0%110 <2.0 100.0%64 <2.0 100.0%
NVHOS, Acid Form 1,900 <2.0 100.0%3,900 2.7 99.9%4,500 <2.0 100.0%2,400 <2.0 100.0%
EVE Acid 340 <2.0 100.0%1,500 <2.0 100.0%1,900 <2.0 100.0%1,300 <2.0 100.0%
Hydro-EVE Acid 1,300 <2.0 100.0%3,000 <2.0 100.0%3,800 <2.0 100.0%2,100 <2.0 100.0%
R-EVE 1,900 J <2.0 100.0%3,100 J 3.7 J 99.9%4,400 J <2.0 100.0%2,600 J <2.0 100.0%
PES <6.7 <2.0 100.0%<6.7 <2.0 100.0%<6.7 <2.0 100.0%<6.7 <2.0 100.0%
PFECA B <27 <2.0 100.0%<27 <2.0 100.0%<27 <2.0 100.0%<27 <2.0 100.0%
PFECA-G <48 <2.0 100.0%<48 <2.0 100.0%<48 <2.0 100.0%<48 <2.0 100.0%
Total Table 3+ (17 compounds)1,2 200,000 4.9 >99.9%400,000 500 99.9%440,000 190 >99.9%230,000 130 99.9%
Total Table 3+ (20 compounds)1 230,000 4.9 >99.9%460,000 530 99.9%510,000 200 >99.9%270,000 140 99.9%
Notes
1 - Total Table 3+ was calculated including J qualified data but not non-detect data. The total Table 3+ sum is rounded to two significant figures.
2 - Total Table 3+ (17 Compounds) does not include R-PSDA, Hydrolyzed PSDA and R-EVE.
Bold - Analyte detected above associated reporting limit.J - Analyte detected. Reported value may not be accurate or precise.ng/L - nanograms per literQA/QC - Quality assurance/ quality controlSOP - standard operating procedure< - Analyte not detected above associated reporting limit.ND - No Table 3+ compounds were detected above their associated reporting limits.
Sample Identification Label Key: "Seep - [A, B, C, or D] - [Sample Location Inside FTC] - [# of Aliquots in Composite Sample] - [MMDDYY]"
Table 3 + SOP (ng/ L)
Percent Removal Percent RemovalPercent Removal Percent Removal
TR0795A Page 2 of 5 November 2021
Table 3b
Summary of Performance Monitoring Analytical Results - Seep B
Reporting Period 5 (September - October 2021)
Chemours Fayetteville Works
Fayetteville, NC
SEEP-B-INFLUENT-
198-102921
SEEP-B-EFFLUENT-
336-102921
Sample Date:Sample Date:
29-Oct-21 29-Oct-21
Hfpo Dimer Acid 24,000 5.2 >99.9%
PFMOAA 110,000 36 >99.9%
PFO2HxA 42,000 6.5 >99.9%
PFO3OA 10,000 <2.0 100.0%
PFO4DA 1,600 <2.0 100.0%
PFO5DA 130 <2.0 100.0%
PMPA 31,000 27 99.9%
PEPA 12,000 <20 100.0%
PS Acid 840 <2.0 100.0%
Hydro-PS Acid 680 <2.0 100.0%
R-PSDA 3,500 J <2.0 100.0%
Hydrolyzed PSDA 32,000 J <2.0 100.0%
R-PSDCA 39 <2.0 100.0%
NVHOS, Acid Form 2,300 <2.0 100.0%
EVE Acid 600 <2.0 100.0%
Hydro-EVE Acid 1,400 <2.0 100.0%
R-EVE 1,800 J <2.0 100.0%
PES <6.7 <2.0 100.0%
PFECA B <27 <2.0 100.0%
PFECA-G <48 <2.0 100.0%
Total Table 3+ (17 compounds)1,2 240,000 75 >99.9%
Total Table 3+ (20 compounds)1 270,000 75 >99.9%
Notes
1 - Total Table 3+ was calculated including J qualified data but not non-detect data. The total Table 3+ sum is rounded to t
2 - Total Table 3+ (17 Compounds) does not include R-PSDA, Hydrolyzed PSDA and R-EVE.
Bold - Analyte detected above associated reporting limit.J - Analyte detected. Reported value may not be accurate or precise.ng/L - nanograms per literQA/QC - Quality assurance/ quality controlSOP - standard operating procedure< - Analyte not detected above associated reporting limit.ND - No Table 3+ compounds were detected above their associated reporting limits.
Sample Identification Label Key: "Seep - [A, B, C, or D] - [Sample Location Inside FTC] - [# of Aliquots in Composite Sa
Percent Removal
Table 3 + SOP (ng/ L)
TR0795A Page 3 of 5 November 2021
Table 3c
Summary of Performance Monitoring Analytical Results - Seep C
Reporting Period 5 (September - October 2021)
Chemours Fayetteville Works
Fayetteville, NC
SEEP-C-INFLUENT-
336-091421
SEEP-C-EFFLUENT-
336-091421
SEEP-C-INFLUENT-
330-100121
SEEP-C-EFFLUENT-
336-100121
SEEP-C-INFLUENT-
336-101521
SEEP-C-EFFLUENT-
336-101521
SEEP-C-INFLUENT-
336-102921
SEEP-C-EFFLUENT-
336-102921
Sample Date:Sample Date:Sample Date:Sample Date:Sample Date:Sample Date:Sample Date:Sample Date:
14-Sep-21 14-Sep-21 1-Oct-21 1-Oct-21 15-Oct-21 15-Oct-21 29-Oct-21 29-Oct-21
Hfpo Dimer Acid 18,000 4.7 >99.9%32,000 3,600 88.8%15,000 32 99.8%18,000 11 99.9%PFMOAA 51,000 82 99.8%86,000 9,800 88.6%42,000 1,200 97.1%51,000 230 99.5%
PFO2HxA 24,000 10 >99.9%40,000 4,100 89.8%21,000 58 99.7%24,000 24 99.9%
PFO3OA 8,000 <2.0 100.0%13,000 1,300 90.0%6,900 8.5 99.9%8,100 2.3 >99.9%
PFO4DA 2,300 <2.0 100.0%4,100 380 90.7%2,700 6.5 99.8%2,500 <2.0 100.0%
PFO5DA <78 <2.0 100.0%140 <16 100.0%120 <2.0 100.0%<78 <2.0 100.0%
PMPA 8,900 15 99.8%14,000 1,500 89.3%8,200 230 97.2%8,400 31 99.6%
PEPA 2,900 <20 100.0%4,500 510 88.7%2,800 <20 100.0%2,800 <20 100.0%PS Acid <20 <2.0 100.0%<20 <3.9 100.0%<20 <2.0 100.0%<20 <2.0 100.0%Hydro-PS Acid 340 <2.0 100.0%630 76 87.9%370 <2.0 100.0%430 <2.0 100.0%R-PSDA 630 J <2.0 100.0%1,200 J 140 J 88.3%600 J <2.0 100.0%830 J <2.0 100.0%Hydrolyzed PSDA 860 J <2.0 100.0%1,500 J 150 J 90.0%720 J <2.0 100.0%980 J <2.0 100.0%R-PSDCA <17 <2.0 100.0%23 <3.5 100.0%<17 <2.0 100.0%<17 <2.0 100.0%NVHOS, Acid Form 640 <2.0 100.0%1,200 130 89.2%570 <2.0 100.0%730 <2.0 100.0%
EVE Acid <17 <2.0 100.0%<17 <3.5 100.0%<17 <2.0 100.0%<17 <2.0 100.0%
Hydro-EVE Acid 1,200 <2.0 100.0%2,000 240 88.0%1,000 <2.0 100.0%1,300 <2.0 100.0%
R-EVE 610 J <2.0 100.0%1,000 J 110 J 89.0%540 J <2.0 100.0%690 J <2.0 100.0%
PES <6.7 <2.0 100.0%<6.7 <2.0 100.0%<6.7 <2.0 100.0%<6.7 <2.0 100.0%
PFECA B <27 <2.0 100.0%<27 <5.3 100.0%<27 <2.0 100.0%<27 <2.0 100.0%
PFECA-G <48 <2.0 100.0%<48 <9.6 100.0%<48 <2.0 100.0%<48 <2.0 100.0%
Total Table 3+ (17 compounds)1,2 120,000 110 99.9%200,000 22,000 89.0%100,000 1,500 98.5%120,000 300 99.8%
Total Table 3+ (20 compounds)1 120,000 110 99.9%200,000 22,000 89.0%100,000 1,500 98.5%120,000 300 99.8%
Notes
1 - Total Table 3+ was calculated including J qualified data but not non-detect data. The total Table 3+ sum is rounded to two significant figures.
2 - Total Table 3+ (17 Compounds) does not include R-PSDA, Hydrolyzed PSDA and R-EVE.Bold - Analyte detected above associated reporting limit.J - Analyte detected. Reported value may not be accurate or precise.ng/L - nanograms per literQA/QC - Quality assurance/ quality controlSOP - standard operating procedure
< - Analyte not detected above associated reporting limit.
ND - No Table 3+ compounds were detected above their associated reporting limits.
Sample Identification Label Key: "Seep - [A, B, C, or D] - [Sample Location Inside FTC] - [# of Aliquots in Composite Sample] - [MMDDYY]"
Percent Removal Percent Removal Percent Removal
Table 3 + SOP (ng/ L)
Percent Removal
TR0795A Page 4 of 5 November 2021
Table 3d
Summary of Performance Monitoring Analytical Results - Seep D
Reporting Period 5 (September - October 2021)
Chemours Fayetteville Works
Fayetteville, NC
SEEP-D-INFLUENT-
318-091421
SEEP-D-EFFLUENT-
336-091421
SEEP-D-INFLUENT-
336-100121
SEEP-D-EFFLUENT-
330-100121
SEEP-D-INFLUENT-
282-101521
SEEP-D-EFFLUENT-
336-101521
SEEP-D-INFLUENT-
336-102921
SEEP-D-EFFLUENT-
336-102921
Sample Date:Sample Date:Sample Date:Sample Date:Sample Date:Sample Date:Sample Date:Sample Date:
14-Sep-21 14-Sep-21 1-Oct-21 1-Oct-21 15-Oct-21 15-Oct-21 29-Oct-21 29-Oct-21
Hfpo Dimer Acid 12,000 <2.0 100.0%25,000 <2.0 100.0%12,000 <2.0 100.0%13,000 <2.0 100.0%
PFMOAA 46,000 <2.0 100.0%86,000 <2.0 100.0%44,000 <2.0 100.0%50,000 10 >99.9%
PFO2HxA 21,000 <2.0 100.0%36,000 <2.0 100.0%22,000 <2.0 100.0%22,000 <2.0 100.0%
PFO3OA 6,400 <2.0 100.0%10,000 <2.0 100.0%6,900 2.7 >99.9%7,000 <2.0 100.0%
PFO4DA 1,700 <2.0 100.0%2,900 <2.0 100.0%2,100 <2.0 100.0%1,800 <2.0 100.0%
PFO5DA <78 <2.0 100.0%160 <2.0 100.0%110 <2.0 100.0%88 <2.0 100.0%
PMPA 7,000 <10 100.0%11,000 <10 100.0%7,300 <10 100.0%6,500 <10 100.0%
PEPA 2,300 <20 100.0%3,700 <20 100.0%2,400 <20 100.0%2,100 <20 100.0%
PS Acid <20 <2.0 100.0%<20 <2.0 100.0%<20 <2.0 100.0%<20 <2.0 100.0%
Hydro-PS Acid 250 <2.0 100.0%430 <2.0 100.0%310 <2.0 100.0%300 <2.0 100.0%
R-PSDA 540 J <2.0 100.0%1,200 J <2.0 100.0%750 J <2.0 100.0%890 J <2.0 100.0%
Hydrolyzed PSDA 1,300 J <2.0 100.0%2,600 J <2.0 100.0%1,600 J 5.2 J 99.7%1,900 J <2.0 100.0%
R-PSDCA <17 <2.0 100.0%<17 <2.0 100.0%<17 <2.0 100.0%<17 <2.0 100.0%
NVHOS, Acid Form 590 <2.0 100.0%1,100 <2.0 100.0%660 <2.0 100.0%700 <2.0 100.0%
EVE Acid <17 <2.0 100.0%<17 <2.0 100.0%<17 <2.0 100.0%<17 <2.0 100.0%
Hydro-EVE Acid 860 <2.0 100.0%1,500 <2.0 100.0%930 <2.0 100.0%1,000 <2.0 100.0%
R-EVE 620 J <2.0 100.0%1,100 J <2.0 100.0%680 J <2.0 100.0%690 J <2.0 100.0%
PES <6.7 <2.0 100.0%<6.7 <2.0 100.0%<6.7 <2.0 100.0%<6.7 <2.0 100.0%
PFECA B <27 <2.0 100.0%<27 <2.0 100.0%<27 <2.0 100.0%<27 <2.0 100.0%
PFECA-G <48 <2.0 100.0%<48 <2.0 100.0%<48 <2.0 100.0%<48 <2.0 100.0%
Total Table 3+ (17 compounds)1,2 98,000 ND 100.0%180,000 ND 100.0%99,000 2.7 >99.9%100,000 10 >99.9%
Total Table 3+ (20 compounds)1 100,000 ND 100.0%180,000 ND 100.0%100,000 7.9 >99.9%110,000 10 >99.9%
Notes
1 - Total Table 3+ was calculated including J qualified data but not non-detect data. The total Table 3+ sum is rounded to two significant figures.
2 - Total Table 3+ (17 Compounds) does not include R-PSDA, Hydrolyzed PSDA and R-EVE.Bold - Analyte detected above associated reporting limit.J - Analyte detected. Reported value may not be accurate or precise.ng/L - nanograms per literQA/QC - Quality assurance/ quality controlSOP - standard operating procedure
UJ – Analyte not detected. Reporting limit may not be accurate or precise.
< - Analyte not detected above associated reporting limit.
ND - No Table 3+ compounds were detected above their associated reporting limits.
Sample Identification Label Key: "Seep - [A, B, C, or D] - [Sample Location Inside FTC] - [# of Aliquots in Composite Sample] - [MMDDYY]"
Table 3 + SOP (ng/ L)
Percent Removal Percent Removal Percent Removal Percent Removal
TR0795A Page 5 of 5 November 2021
Table 4a
Summary of Wet Weather Analytical Results - Seep A
Reporting Period 5 (September - October 2021)
Chemours Fayetteville Works
Fayetteville, NC
SEEP-A-INFLUENT-
RAIN-24-092221
SEEP-A-EFFLUENT-
RAIN-24-092221
SEEP-A-INFLUENT-
RAIN-24-101021
SEEP-A-EFFLUENT-
RAIN-24-101021
Sample Date:Sample Date:Percent Removal Sample Date:Sample Date:Percent Removal
22-Sep-21 22-Sep-21 10-Oct-21 10-Oct-21
Hfpo Dimer Acid 19,000 2.4 >99.9%25,000 2.7 >99.9%PFMOAA 50,000 21 >99.9%67,000 25 >99.9%PFO2HxA 30,000 4.7 >99.9%31,000 4.6 >99.9%
PFO3OA 11,000 <2.0 100.0%10,000 <2.0 100.0%PFO4DA 5,100 <2.0 100.0%5,500 <2.0 100.0%PFO5DA 2,800 <2.0 100.0%2,600 <2.0 100.0%
PMPA 14,000 <10 100.0%14,000 <10 100.0%PEPA 5,200 <20 100.0%5,000 <20 100.0%
PS Acid 3,400 <2.0 100.0%4,800 <2.0 100.0%
Hydro-PS Acid 1,000 <2.0 100.0%1,300 <2.0 100.0%R-PSDA 1,800 J <2.0 100.0% 1,700 UJ <2.0 100.0%
Hydrolyzed PSDA 22,000 J <2.0 100.0% 19,000 UJ <2.0 100.0%
R-PSDCA 37 <2.0 100.0%37 <2.0 100.0%NVHOS, Acid Form 920 <2.0 100.0%1,000 <2.0 100.0%
EVE Acid 520 <2.0 100.0%580 <2.0 100.0%Hydro-EVE Acid 1,200 <2.0 100.0%1,400 <2.0 100.0%R-EVE 830 J <2.0 100.0% 710 UJ <2.0 100.0%
PES <6.7 <2.0 100.0%41 <2.0 100.0%PFECA B <27 <2.0 100.0% <27 <2.0 100.0%
PFECA-G <48 <2.0 100.0% <48 <2.0 100.0%
Total Table 3+ (17 Compounds) [1,2]140,000 28 >99.9%170,000 32 >99.9%
Total Table 3+ (20 Compounds) [1]170,000 28 >99.9%190,000 32 >99.9%
Notes:
1 - Total Table 3+ was calculated including J qualified data but not non-detect data. The total Table 3+ sum is rounded to two significant figures.
2 - Total Table 3+ (17 Compounds) does not include R-PSDA, Hydrolyzed PSDA and R-EVE.
Bold - Analyte detected above associated reporting limit.J - Analyte detected. Reported value may not be accurate or precise.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality controlSOP - standard operating procedure
< - Analyte not detected above associated reporting limit.
ND - No Table 3+ compounds were detected above their associated reporting limits.Sample Identification Label Key: "Seep - [A, B, C, or D] - [Sample Location Inside FTC] - [# of Aliquots in Composite Sample] - [MMDDYY]"
Table 3+ SOP (ng/L)
TR0795A Page 1 of 4 November 2021
Table 4b
Summary of Wet Weather Analytical Results - Seep B
Reporting Period 5 (September - October 2021)
Chemours Fayetteville Works
Fayetteville, NC
SEEP-B-INFLUENT-
RAIN-24-092221
SEEP-B-EFFLUENT-
RAIN-24-92221
SEEP-B-INFLUENT-
RAIN-24-102621
SEEP-B-EFFLUENT-
RAIN-16-102621
Sample Date:Sample Date:Percent Removal Sample Date:Sample Date:Percent Removal
22-Sep-21 22-Sep-21 26-Oct-21 26-Oct-21
Hfpo Dimer Acid 33,000 17 99.9%27,000 4.5 >99.9%PFMOAA 62,000 110 99.8%88,000 30 >99.9%PFO2HxA 28,000 16 99.9%35,000 5.1 >99.9%
PFO3OA 7,200 2.4 >99.9%9,000 <2.0 100.0%PFO4DA 1,200 <2.0 100.0%1,500 <2.0 100.0%PFO5DA 310 <2.0 100.0%170 <2.0 100.0%
PMPA 40,000 65 99.8%29,000 24 99.9%PEPA 20,000 <20 100.0%13,000 <20 100.0%
PS Acid 2,500 <2.0 100.0%1,100 <2.0 100.0%
Hydro-PS Acid 960 <2.0 100.0%820 <2.0 100.0%R-PSDA 4,200 J <2.0 100.0%3,200 J <2.0 100.0%
Hydrolyzed PSDA 31,000 J 11 J >99.9%28,000 J <2.0 100.0%
R-PSDCA 63 <2.0 100.0%40 <2.0 100.0%NVHOS, Acid Form 2,500 <2.0 100.0%2,200 <2.0 100.0%
EVE Acid 2,100 <2.0 100.0%840 <2.0 100.0%Hydro-EVE Acid 2,200 <2.0 100.0%1,500 <2.0 100.0%R-EVE 2,800 J <2.0 100.0%1,900 J <2.0 100.0%
PES <6.7 <2.0 100.0%<6.7 <2.0 100.0%PFECA B <27 <2.0 100.0%<27 <2.0 100.0%
PFECA-G <48 <2.0 100.0%<48 <2.0 100.0%
Total Table 3+ (17 Compounds) [1,2]200,000 210 99.9%210,000 64 >99.9%
Total Table 3+ (20 Compounds) [1]240,000 220 99.9%240,000 64 >99.9%
Notes:
1 - Total Table 3+ was calculated including J qualified data but not non-detect data. The total Table 3+ sum is rounded to two significant figures.
2 - Total Table 3+ (17 Compounds) does not include R-PSDA, Hydrolyzed PSDA and R-EVE.
Bold - Analyte detected above associated reporting limit.J - Analyte detected. Reported value may not be accurate or precise.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality controlSOP - standard operating procedure
< - Analyte not detected above associated reporting limit.
ND - No Table 3+ compounds were detected above their associated reporting limits.Sample Identification Label Key: "Seep - [A, B, C, or D] - [Sample Location Inside FTC] - [# of Aliquots in Composite Sample] - [MMDDYY]"
Table 3+ SOP (ng/L)
TR0795A Page 2 of 4 November 2021
Table 4c
Summary of Wet Weather Analytical Results - Seep C
Reporting Period 5 (September - October 2021)
Chemours Fayetteville Works
Fayetteville, NC
SEEP-C-INFLUENT-
RAIN-24-092321
SEEP-C-EFFLUENT-
RAIN-24-092321
SEEP-C-INFLUENT-
RAIN-16-102621
SEEP-C-EFFLUENT-
RAIN-21-102621
Sample Date:Sample Date:Percent Removal Sample Date:Sample Date:Percent Removal
23-Sep-21 23-Sep-21 26-Oct-21 26-Oct-21
Hfpo Dimer Acid 12,000 13 99.9%19,000 5 >99.9%PFMOAA 35,000 940 97.3%53,000 69 99.9%PFO2HxA 16,000 37 99.8%24,000 10 >99.9%
PFO3OA 5,100 <2.0 100.0%7,900 <2.0 100.0%PFO4DA 1,800 <2.0 100.0%2,700 <2.0 100.0%PFO5DA <78 <2.0 100.0%94 <2.0 100.0%
PMPA 6,100 120 98.0%8,700 13 99.9%PEPA 2,000 <20 100.0%2,800 <20 100.0%
PS Acid <20 <2.0 100.0%<20 <2.0 100.0%
Hydro-PS Acid 290 <2.0 100.0%400 <2.0 100.0%R-PSDA 530 J <2.0 100.0%790 J <2.0 100.0%
Hydrolyzed PSDA 700 J <2.0 100.0%1,000 J <2.0 100.0%
R-PSDCA <17 <2.0 100.0%<17 <2.0 100.0%NVHOS, Acid Form 470 <2.0 100.0%700 <2.0 100.0%
EVE Acid <17 <2.0 100.0%<17 <2.0 100.0%Hydro-EVE Acid 890 <2.0 100.0%1,300 <2.0 100.0%R-EVE 480 J <2.0 100.0%700 J <2.0 100.0%
PES <6.7 <2.0 100.0%<6.7 <2.0 100.0%PFECA B <27 <2.0 100.0%<27 <2.0 100.0%
PFECA-G <48 <2.0 100.0%<48 <2.0 100.0%
Total Table 3+ (17 Compounds) [1,2]80,000 1,100 98.6%120,000 97 99.9%
Total Table 3+ (20 Compounds) [1]81,000 1,100 98.6%120,000 97 99.9%
Notes:
1 - Total Table 3+ was calculated including J qualified data but not non-detect data. The total Table 3+ sum is rounded to two significant figures.
2 - Total Table 3+ (17 Compounds) does not include R-PSDA, Hydrolyzed PSDA and R-EVE.
Bold - Analyte detected above associated reporting limit.J - Analyte detected. Reported value may not be accurate or precise.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality controlSOP - standard operating procedure
< - Analyte not detected above associated reporting limit.
ND - No Table 3+ compounds were detected above their associated reporting limits.Sample Identification Label Key: "Seep - [A, B, C, or D] - [Sample Location Inside FTC] - [# of Aliquots in Composite Sample] - [MMDDYY]"
Table 3+ SOP (ng/L)
TR0795A Page 3 of 4 November 2021
Table 4d
Summary of Wet Weather Analytical Results - Seep D
Reporting Period 5 (September - October 2021)
Chemours Fayetteville Works
Fayetteville, NC
SEEP-D-INFLUENT-
RAIN-24-092321
SEEP-D-EFFLUENT-
RAIN-24-092321
SEEP-D-INFLUENT-
RAIN-21-102621
SEEP-D-EFFLUENT-
RAIN-24-102621
Sample Date:Sample Date:Percent Removal Sample Date:Sample Date:Percent Removal
23-Sep-21 23-Sep-21 26-Oct-21 26-Oct-21
Hfpo Dimer Acid 11,000 <2.0 100.0%14,000 <2.0 100.0%PFMOAA 35,000 2.9 >99.9%50,000 3 >99.9%PFO2HxA 16,000 <2.0 100.0%21,000 <2.0 100.0%
PFO3OA 4,800 <2.0 100.0%6,800 <2.0 100.0%PFO4DA 1,300 <2.0 100.0%1,800 <2.0 100.0%PFO5DA 110 <2.0 100.0%100 <2.0 100.0%
PMPA 5,600 <10 100.0%6,100 <10 100.0%PEPA 1,800 <20 100.0%2,000 <20 100.0%
PS Acid <20 <2.0 100.0%<20 <2.0 100.0%
Hydro-PS Acid 200 <2.0 100.0%270 <2.0 100.0%R-PSDA 560 J <2.0 100.0%780 J <2.0 100.0%
Hydrolyzed PSDA 1,400 J <2.0 100.0%1,700 J <2.0 100.0%
R-PSDCA <17 <2.0 100.0%<17 <2.0 100.0%NVHOS, Acid Form 470 <2.0 100.0%680 <2.0 100.0%
EVE Acid <17 <2.0 100.0%<17 <2.0 100.0%Hydro-EVE Acid 700 <2.0 100.0%960 <2.0 100.0%R-EVE 460 J <2.0 100.0%660 J <2.0 100.0%
PES <6.7 <2.0 100.0%<6.7 <2.0 100.0%PFECA B <27 <2.0 100.0%<27 <2.0 100.0%
PFECA-G <48 <2.0 100.0%<48 <2.0 100.0%
Total Table 3+ (17 Compounds) [1,2]77,000 2.9 >99.9%100,000 3.0 >99.9%
Total Table 3+ (20 Compounds) [1]79,000 2.9 >99.9%110,000 3.0 >99.9%
Notes:
1 - Total Table 3+ was calculated including J qualified data but not non-detect data. The total Table 3+ sum is rounded to two significant figures.
2 - Total Table 3+ (17 Compounds) does not include R-PSDA, Hydrolyzed PSDA and R-EVE.
Bold - Analyte detected above associated reporting limit.J - Analyte detected. Reported value may not be accurate or precise.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality controlSOP - standard operating procedure
< - Analyte not detected above associated reporting limit.
ND - No Table 3+ compounds were detected above their associated reporting limits.Sample Identification Label Key: "Seep - [A, B, C, or D] - [Sample Location Inside FTC] - [# of Aliquots in Composite Sample] - [MMDDYY]"
Table 3+ SOP (ng/L)
TR0795A Page 4 of 4 November 2021
Table 5
Cape Fear River Elevation and Local Precipitation Statistics
Reporting Period 5 (September - October 2021)Chemours Fayetteville WorksFayetteville, NC
Percent of
Reporting Period Number of Days Percent of
Reporting Period Number of Days Percent of
Reporting Period Number of Days Percent of
Reporting Period Number of Days
C 320 61 0%0.0 0%0.0 0%0.0 0%0.0
A 187 61 0%0.0 0%0.0 0%0.0 1%1.9
B 146 61 0%0.0 0%0.0 0%0.0 0%0.0
D 130 61 0%0.0 0%0.0 0%0.0 0%0.0
4.2
7.53
40.67
35.94
43.44
Notes
1 River elevation and precipitation data from USGS Huske Lock and Dam site 02105500.
2 The historical average was calculated using available data when the Huske rain gauge was operable.
3
Historical Year-to-Date Average (2004-2020)2
The precipitation data downloaded from USGS for the site 02105500 had missing rainfall information from May 7 through May 27. Onsite meteorological data was used to supplement this gap.
River Above Spillway Elevation River Above GAC Elevation River Above Discharge Pipe# of Days in Reporting Period
Current Reporting Period Historical Average (Sep - Oct 2004-2020)2
1.7%2.2%3.7%9.6%
Historical Annual Average (2004-2020)2
Seep # of Days of Operation on Record
River Above Wall Elevation
Precipitation (inches)
Current Reporting Period (Sep - Oct 2021)
Historical Annual Average (2007-2020)
2021 Year-to-Date3
TR0795A Page 1 of 1 November 2021
Table 6a
Water Quality Data - Seep A
Reporting Period 5 (September - October 2021)
Chemours Fayetteville Works
Fayetteville, North Carolina
Influent Effluent Difference Influent Effluent Difference Influent Effluent Difference Influent Effluent Difference Influent Effluent Difference Influent Effluent Difference
9/7/2021 5.4 1.9 -3.5 5.2 7.4 2.2 205 529 324 22 22 0 5.00 0.34 -4.66 0 0 0
9/13/2021 6.1 4.9 -1.2 4.0 4.8 0.8 163 144 -19 25 24 -1 7.14 0.64 -6.5 0 0 0
9/14/2021 7.5 7.6 0.1 3.8 5.4 1.6 201 140 -61 27 26 -1 0.50 0.33 -0.17 0 0 0
9/20/2021 5.8 4.6 -1.2 4.0 4.9 0.9 191 199 8 22 22 0 3.87 0.65 -3.22 0 0 0
9/22/2021 4.6 5.3 0.7 7.7 7.5 -0.2 174 113 -61 24 23 -1 352.00 2.11 -349.89 0 0 0
10/1/2021 8.3 8.1 -0.2 3.9 4.3 0.4 160 128 -32 22 22 0 6.36 0.81 -5.55 NM NM --
10/11/2021 6.9 6.9 0.0 4.8 5.2 0.4 143 133 -10 22 23 1 8.84 0.31 -8.53 NM NM --
10/15/2021 7.1 7.7 0.6 4.4 4.9 0.5 126 132 6 25 24 -1 2.03 0.00 -2.03 0 0 0
10/18/2021 4.2 3.4 -0.8 3.8 4.3 0.5 165 143 -22 18 19 1 6.11 0.51 -5.6 NM NM --
10/29/2021 4.2 5.8 1.6 3.1 4.1 1 154 122 -32 16 16 0 4.88 0.00 -4.88 NM NM --
Average 6.0 5.6 -0.4 4.5 5.3 0.8 168.2 178.4 10.2 22.3 22.2 -0.1 39.7 0.6 -39.1 0.0 0.0 0.0
Median 5.9 5.5 -0.4 4.0 4.9 0.9 164.1 136.6 -27.5 22.4 22.4 0.0 5.6 0.4 -5.2 0.0 0.0 0.0
Notes:
DO dissolved oxygen
mg/L milligrams per liter
SU standard units
NTU neophelometric turbidity units
µS/cm microSiemens per centimeter
TSS total suspended solids
NM Not Measured
pH Specific Conductance
(mg/L)(SU)(µS/cm)Date
DO Temperature Turbidity
(°C)(NTU)
TSS
(mg/L)
TR0795A Page 1 of 4 November 2021
Table 6b
Water Quality Data - Seep B
Reporting Period 5 (September - October 2021)
Chemours Fayetteville Works
Fayetteville, North Carolina
Influent Effluent Difference Influent Effluent Difference Influent Effluent Difference Influent Effluent Difference Influent Effluent Difference Influent Effluent Difference
9/7/2021 2.9 3.4 0.5 4.2 4.7 0.5 129 136 7 23 22 -1 2.28 0.52 -1.76 0 0 0
9/9/2021 7.7 7.2 -0.5 7.0 7.0 0 135 174 39 25 25 0 7.74 0.84 -6.90 0 0 0
9/13/2021 4.7 3.8 -0.9 4.5 6.2 1.7 126 125 -1 24 24 0 1.58 0.62 -0.96 0 0 0
9/20/2021 4.8 5.6 0.8 4.8 5.3 0.5 120 154 34 24 24 0 3.58 0.60 -2.98 0 0 0
9/22/2021 6.1 NM --4.8 NM --82 NM --25 NM --15.90 NM --0 NM --
9/23/2021 8.3 7.5 -0.8 5.5 6.0 0.5 493 952 459 19 20 1 3.51 14.15 10.64 0 0 0
10/1/2021 8.3 8.2 -0.1 4.7 6.9 2.2 193 387 194 23 25 2 0.86 0.84 -0.02 NM NM --
10/11/2021 5.1 6.2 1.1 7.1 7.6 0.5 128 108 -20 21 22 1 3.70 0.40 -3.30 0 0 0
10/15/2021 7.5 7.5 0 5.6 6.0 0.4 113 114 1 23 25 2 4.57 0.03 -4.54 0 0 0
10/18/2021 3.7 4.1 0.4 5.0 5.5 0.5 122 121 -1 19 20 1 12.68 1.44 -11.24 NM NM --
10/26/2021 5.7 8.2 2.5 4.7 5.9 1.2 130 130 0 21 204 183 2.23 0.00 -2.23 NM NM --
10/29/2021 1.8 5.4 3.6 4.5 5.1 0.6 124 116 -8 17 17 0 0.24 0.00 -0.24 NM NM --
Average 5.6 6.1 0.5 5.2 6.0 0.8 157.9 228.9 71.0 22.1 38.8 17.0 4.9 1.8 -3.1 0.0 0.0 0.0
Median 5.4 6.2 0.8 4.8 6.0 1.2 127.3 130.3 3.0 23.2 23.5 1.0 3.5 0.6 -2.9 0.0 0.0 0.0
Notes:
DO dissolved oxygen
mg/L milligrams per liter
SU standard units
NTU neophelometric turbidity units
µS/cm microSiemens per centimeter
TSS total suspended solids
NM Not Measured
(mg/L)
TSS
Date
DO
(mg/L)
pH
(SU)
Specific Conductance
(µS/cm)
Temperature
(°C)
Turbidity
(NTU)
TR0795A Page 2 of 4 November 2021
Table 6c
Water Quality Data - Seep C
Reporting Period 5 (September - October 2021)
Chemours Fayetteville Works
Fayetteville, North Carolina
Influent Effluent Difference Influent Effluent Difference Influent Effluent Difference Influent Effluent Difference Influent Effluent Difference Influent Effluent Difference
9/7/2021 5.4 5.5 0.1 4.9 5.7 0.8 86 101 15 24 24 0 1.09 0.48 -0.61 0 0 0
9/13/2021 NM 5.3 --NM 6.2 --NM 82 --NM 27 --NM 0.71 --NM 0 --
9/14/2021 6.8 7.5 0.7 5.7 5.3 -0.4 85 90 5 26 26 0 0.42 1.67 1.30 0 0 0
9/20/2021 4.9 6.3 1.4 4.7 5.5 0.8 85 84 -1 26 25 -1 1.26 0.61 -0.70 0 0 0
9/23/2021 5.9 5.8 -0.1 6.8 6.9 0.1 107 104 -3 28 28 0 51.60 3.77 -47.80 0 0 0
10/11/2021 3.5 6.4 2.9 6.4 6.6 0.2 85 127 42 21 21 0 172.00 8.89 -163.10 0 0 0
10/15/2021 7.4 7.2 -0.2 6.2 5.9 -0.3 81 113 32 25 25 0 116.00 12.50 -103.50 0 0 0
10/18/2021 5.1 1.9 -3.2 5.0 7.9 2.9 83 87 4 20 21 1 16.15 1.11 -15.10 NM NM --
10/26/2021 9.1 8.6 -0.5 5.5 6.8 1.3 86 153 67 16 15 -1 47.17 0.86 -46.30 NM NM --
Average 6.2 6.2 0.0 5.7 6.3 0.6 84.3 100.4 16.1 23.4 23.6 0.2 51.5 4.4 -47.1 0.0 0.0 0.0
Median 5.9 6.4 0.5 5.7 6.1 0.4 85.3 95.5 10.2 24.3 24.5 0.2 47.2 1.4 -45.8 0.0 0.0 0.0
Notes:
DO dissolved oxygen
mg/L milligrams per liter
SU standard units
NTU neophelometric turbidity units
µS/cm microSiemens per centimeter
TSS total suspended solids
NM Not Measured
Date
DO
(mg/L)(mg/L)
TSS
(SU)(µS/cm)(°C)(NTU)
pH Specific Conductance Temperature Turbidity
TR0795A Page 3 of 4 November 2021
Table 6d
Water Quality Data - Seep D
Reporting Period 5 (September - October 2021)
Chemours Fayetteville Works
Fayetteville, North Carolina
Influent Effluent Difference Influent Effluent Difference Influent Effluent Difference Influent Effluent Difference Influent Effluent Difference Influent Effluent Difference
9/7/2021 2.1 4.6 2.5 4.0 4.8 0.8 146 152 6 22 23 1 4.55 0.36 -4.19 0 0 0
9/13/2021 5.6 5.1 -0.5 4.0 4.8 0.8 154 126 -28 25 22 -3 8.53 0.87 -7.66 0 0 0
9/14/2021 7.5 7.5 0.0 3.7 4.6 0.9 166 130 -36 27 27 0 29.20 0.47 -28.73 0 0 0
9/20/2021 4.7 6.8 2.1 4.0 4.6 0.6 144 126 -18 23 23 0 13.12 1.74 -11.38 0 0 0
9/23/2021 5.4 1.7 -3.7 5.2 7.7 2.5 127 642 515 24 24 0 17.50 0.54 -16.96 0 0 0
10/1/2021 7.9 7.9 0.0 3.9 4.7 0.8 159 136 -23 29 25 -4 2.44 1.42 -1.02 NM NM --
10/11/2021 4.8 7.1 2.3 7.1 9.1 2.0 153 171 18 20 21 1 7.05 0.97 -6.08 0 0 0
10/15/2021 7.7 7.2 -0.5 4.1 4.4 0.3 296 158 -138 22 24 2 0.65 0.00 -0.65 0 0 0
10/26/2021 9.1 9.0 -0.1 6.4 5.7 -0.7 136 132 -4 14 13 -1 78.35 2.39 -75.96 NM NM --
Average 6.1 5.9 -0.2 4.7 5.7 1.0 158.6 193.1 34.5 22.8 22.3 -0.5 17.7 1.0 -16.7 0.0 0.0 0.0
Median 5.8 6.9 1.1 4.1 4.8 0.7 149.4 143.9 -5.5 22.8 23.1 0.3 10.8 0.9 -9.9 0.0 0.0 0.0
Notes:
DO dissolved oxygen
mg/L milligrams per liter
SU standard units
NTU neophelometric turbidity units
µS/cm microSiemens per centimeter
TSS total suspended solids
NM Not Measured
Date
DO
(mg/L)
TSS
(mg/L)
pH
(SU)
Specific Conductance
(µS/cm)
Temperature
(°C)
Turbidity
(NTU)
TR0795A Page 4 of 4 November 2021

TR0795A

FIGURES

Legend
River--GAC Changeout
Notes:
As-built survey information for Seep C from RMA Surveying October 2020.
River elevation from USGS Huske Lock and Dam site 02105500, converted to NAVD88.
For clarity of presentation, Figure 1 shows Seep C elevations only.
FB1/FB2 = Filter Bed 1/Filter Bed 2
GAC = Granular Activated Carbon Raleigh, NC November 2021
River Level & FTC As-Built Elevations
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
1
Top of Wall
Spillway
Top of GAC
Discharge Invert
Seep C -FB2Seep B -FB1 Seep D -FB1
25
30
35
40
45
50
55
9/1/2021 9/11/2021 9/21/2021 10/1/2021 10/11/2021 10/21/2021 10/31/2021Elevation, feet above sea level, NAVD88River Elevation During Flow Through Cell Operation (09/01/2021 through 10/31/2021)
Seep C -FB1
Legend−Measured Discharge Flowrate
81 112
190 295
682 882
Notes:
gpm - gallons per minute
Figure 2a depicts the measured discharge flowrate (solid green) of water processed through the filter beds calculated using the Effluent Stilling Basin transducer data.
Raleigh, NC November 2021
Fayetteville, North Carolina
Figure
2a
Flowrate Statistics (gpm)
(09/01 -
10/31)Since Startup
Median
95th percentile
Max
Measured Discharge Flowrate
(Sep - Oct 2021) - Seep A
Chemours Fayetteville Works
0
100
200
300
400
500
600
700
9/1/219/3/219/5/219/7/219/9/219/11/219/13/219/15/219/17/219/19/219/21/219/23/219/25/219/27/219/29/2110/1/2110/3/2110/5/2110/7/2110/9/2110/11/2110/13/2110/15/2110/17/2110/19/2110/21/2110/23/2110/25/2110/27/2110/29/2110/31/21Flowrate (gpm)
Legend−Measured Discharge Flowrate
113 106
236 242
535 1,153
Raleigh, NC November 2021
Chemours Fayetteville WorksFayetteville, North Carolina
Figure
2b
Measured Discharge Flowrate
(Sep - Oct 2021) - Seep B
Flowrate Statistics (gpm)
(09/01 -
10/31)Since Startup
Median
95th percentile
MaxNotes:
gpm - gallons per minute
Figure 2b depicts the measured discharge flowrate (solid green) of water processed through the filter beds calculated using the Effluent Stilling Basin transducer data.
0
100
200
300
400
500
600
700
9/1/219/5/219/9/219/13/219/17/219/21/219/25/219/29/2110/3/2110/7/2110/11/2110/15/2110/19/2110/23/2110/27/2110/31/21Flowrate (gpm)
Legend−Measured Discharge Flowrate Transducer Data Gap--Imputed Discharge Flowrate 53 81
101 160
189 372
Notes:
gpm - gallons per minute
Raleigh, NC November 2021
Measured Discharge Flowrate
(Sep - Oct 2021) - Seep C
Fayetteville, North Carolina
Figure
Flowrate Statistics (gpm)
2c
Chemours Fayetteville Works
Median
95th percentile
Max
(09/01 -
10/31)Since Startup
Figure 2c depicts the measured discharge flowrate (solid green) of water processed through the filter beds calculated using the Effluent Stilling Basin transducer data.
Effluent transducer data from October 25, 10:15 through October 31, 23:59 was not retrieved. Telemetry data collected at the Seep was used for this time period. Telemetry data from
10/29/2021 20:45 to 10/30/2021 13:00 and 10/30/2021 16:45 to 10/31/2021 12:00 was not retrieved due to intermittent satellite transmission issues. Where transducer data was
missing (grey shading) but flow through the System was observed (i.e., non-flooding conditions), flowrate was extrapolated (dashed green). The imputed flowrate was calculated using
the measured flowrates before and after the data gap. Section 3 describes the gaps in transducer data record.
0
50
100
150
200
250
9/1/219/3/219/5/219/7/219/9/219/11/219/13/219/15/219/17/219/19/219/21/219/23/219/25/219/27/219/29/2110/1/2110/3/2110/5/2110/7/2110/9/2110/11/2110/13/2110/15/2110/17/2110/19/2110/21/2110/23/2110/25/2110/27/2110/29/2110/31/21Flowrate (gpm)
Legend−Measured Discharge Flowrate
84 118
231 311
564 763
Notes:
gpm - gallons per minute
Figure 2d depicts the measured discharge flowrate of water processed through the filter beds calculated using the Effluent Stilling Basin transducer data.
Raleigh, NC November 2021
Figure
2d
Flowrate Statistics (gpm)
(09/01 -
10/31)Since Startup
Median
95th percentile
Max
Measured Discharge Flowrate
(Sep - Oct 2021) - Seep D
Chemours Fayetteville Works
Fayetteville, North Carolina
0
100
200
300
400
500
600
700
9/1/219/5/219/9/219/13/219/17/219/21/219/25/219/29/2110/3/2110/7/2110/11/2110/15/2110/19/2110/23/2110/27/2110/31/21Flowrate (gpm)
Legend−Influent Chamber/Impoundment Water Elevation USGS Precipitation (daily totals)−Impoundment Water Elevation Above Bypass Spillway Telemetry Precipitation (daily totals)
Bypass Spillway Elevation
Notes:
Figure 3a depicts the influent transducer data that was collected during the reporting period (blue line). Instances of impoundment bypass flow are shown in orange.
Raleigh, NC November 2021
Influent Water Elevation and Bypass
Flow (Sep - Oct 2021) - Seep A
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
3a
Precipitation data obtained from USGS gauge# 02105500 at the William O. Huske Lock and Dam and telemetry rain gauge installed at Seep A. Telemetry data became available on
October 10, 2021.
38
38.5
39
39.5
40
40.5
41
41.5
42
42.5
43
9/1/219/5/219/9/219/13/219/17/219/21/219/25/219/29/2110/3/2110/7/2110/11/2110/15/2110/19/2110/23/2110/27/2110/31/21Elevation (ft msl)0
0.5
1
1.5
2
Precipitation (in)
Legend−Influent Chamber/Impoundment Water Elevation USGS Precipitation (daily totals)−Impoundment Water Elevation Above Bypass Spillway Telemetry Precipitation (daily totals)
Bypass Spillway Elevation
Notes:
Figure 3b shows the influent transducer data that was collected during the reporting period (blue line). Instances of impoundment bypass flow are shown in orange.
Raleigh, NC November 2021
Influent Water Elevation and Bypass
Flow (Sep - Oct 2021) - Seep B
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
3b
Precipitation data obtained from USGS gauge# 02105500 at the William O. Huske Lock and Dam and telemetry rain gauge installed at Seep A. Telemetry data became available on
October 10, 2021. Seep B telemetry equipment is expected to be installed in November 2021.
39
39.5
40
40.5
41
41.5
42
42.5
43
9/1/219/5/219/9/219/13/219/17/219/21/219/25/219/29/2110/3/2110/7/2110/11/2110/15/2110/19/2110/23/2110/27/2110/31/21Elevation (ft msl)0
0.5
1
1.5
2
Precipitation (in)
Legend−Influent Chamber/Impoundment Water Elevation USGS Precipitation (daily totals)−Impoundment Water Elevation Above Bypass Spillway Telemetry Precipitation (daily totals)
Bypass Spillway Elevation
Raleigh, NC November 2021 3c
Fayetteville, North Carolina
Figure
Influent Water Elevation and Bypass
Flow (Sep - Oct 2021) - Seep C
Chemours Fayetteville Works
Notes:
Figure 3c shows the influent transducer data that was collected during the reporting period (blue line). Instances of impoundment bypass flow are shown in orange. Precipitation
data obtained from USGS gauge# 02105500 at the William O. Huske Lock and Dam and telemetry rain gauge installed at Seep C. Telemetry data became available on October
10, 2021.
39
39.5
40
40.5
41
41.5
42
42.5
43
9/1/219/5/219/9/219/13/219/17/219/21/219/25/219/29/2110/3/2110/7/2110/11/2110/15/2110/19/2110/23/2110/27/2110/31/21Elevation (ft msl)0
0.5
1
1.5
2
Precipitation (in)
Legend−Influent Chamber/Impoundment Water Elevation USGS Precipitation (daily totals)−Impoundment Water Elevation Above Bypass Spillway Telemetry Precipitation (daily totals)
Bypass Spillway Elevation
Raleigh, NC November 2021
Influent Water Elevation and Bypass
Flow (Sep - Oct 2021) - Seep D
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
3d
Notes:
Figure 3d shows the influent transducer data that was collected during the reporting period (blue line). Instances of impoundment bypass flow are shown in orange. Precipitation
data obtained from USGS gauge# 02105500 at the William O. Huske Lock and Dam and telemetry rain gauge installed at Seep C. Telemetry data became available on October
10, 2021. Seep D telemetry equipment is expected to be installed in November 2021.
38
38.5
39
39.5
40
40.5
41
41.5
42
42.5
43
9/1/219/5/219/9/219/13/219/17/219/21/219/25/219/29/2110/3/2110/7/2110/11/2110/15/2110/19/2110/23/2110/27/2110/31/21Elevation (ft msl)0
0.5
1
1.5
2
Precipitation (in)
Legend−Turbidity
Precipitation (daily totals)
Notes
NTU - Nephelometric Turbidity Unit
Turbidity data logged with a AquaTROLL Turbidiy Sensor placed in the Influent Stilling Basin.
Raleigh, NC November 2021
Seep D Turbidity Logging and
Precipitation (Sep - Nov 2021)
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
4
0
50
100
150
200
250
300
350
400
9/1/219/3/219/5/219/7/219/9/219/11/219/13/219/15/219/17/219/19/219/21/219/23/219/25/219/27/219/29/2110/1/2110/3/2110/5/2110/7/2110/9/21Turbidity (NTU)0
0.5
1
1.5
2
Precipitation (in)

TR0795A
APPENDIX A
Transducer Data Reduction

Legend−Discharge Basin Elevation−Weir 3 Elevation
Notes:
Figure A1-A shows the discharge basin transducer data that was collected during the reporting period.
Raleigh, NC November 2021
Discharge Basin Water Elevation -
Seep A
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
A1-A
36
36.5
37
37.5
38
38.5
39
9/1/219/3/219/5/219/7/219/9/219/11/219/13/219/15/219/17/219/19/219/21/219/23/219/25/219/27/219/29/2110/1/2110/3/2110/5/2110/7/2110/9/2110/11/2110/13/2110/15/2110/17/2110/19/2110/21/2110/23/2110/25/2110/27/2110/29/2110/31/21Elevation (ft msl)
Legend−Discharge Basin Water Elevation USGS Precipitation (daily totals)−River Stage Telemetry Precipitation (daily totals)−Weir 3 Elevation
Notes:
Raleigh, NC November 2021
Discharge Basin Water Elevation and
External Forcings - Seep A
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
A2-A
As water can flow through the flow-through cell both as a result of wet weather inflow and elevated river levels from flooding, Figure A2-A compares the available transducer data to
precipitation from the telemetry rain gauge installed at Seep A, which became available on October 10, 2021, and precipitation and river stage elevation data available from the USGS Huske
Lock and Dam.
29
31
33
35
37
39
41
9/1/219/3/219/5/219/7/219/9/219/11/219/13/219/15/219/17/219/19/219/21/219/23/219/25/219/27/219/29/2110/1/2110/3/2110/5/2110/7/2110/9/2110/11/2110/13/2110/15/2110/17/2110/19/2110/21/2110/23/2110/25/2110/27/2110/29/2110/31/21Elevation (ft msl)0
0.5
1
1.5
2
Precipitation (in)
Legend−Influent Chamber/Impoundment Elevation
Notes:
Figure A3-A shows the influent transducer data that was collected during the reporting period.
Raleigh, NC November 2021
Inlet Chamber Water Elevation -
Seep A
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
A3-A
38
38.5
39
39.5
40
40.5
41
41.5
42
9/1/219/3/219/5/219/7/219/9/219/11/219/13/219/15/219/17/219/19/219/21/219/23/219/25/219/27/219/29/2110/1/2110/3/2110/5/2110/7/2110/9/2110/11/2110/13/2110/15/2110/17/2110/19/2110/21/2110/23/2110/25/2110/27/2110/29/2110/31/21Elevation (ft msl)
Legend−Inlet Chamber Water Elevation USGS Precipitation (daily totals)−River Stage Telemetry Precipitation (daily totals)
Bypass Spillway Elevation
Notes:
Raleigh, NC November 2021
Inlet Chamber Water Elevation and
External Forcings - Seep A
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
A4-A
As water can flow through the Bypass Spillway both as a result of wet weather inflow and elevated river levels from flooding, Figure A4-A compares the available transducer data to
precipitation from the telemetry rain gauge installed at Seep A, which became available on October 10, 2021, and precipitation and river stage elevation data available from the USGS Huske
Lock and Dam.
29
31
33
35
37
39
41
43
9/1/219/3/219/5/219/7/219/9/219/11/219/13/219/15/219/17/219/19/219/21/219/23/219/25/219/27/219/29/2110/1/2110/3/2110/5/2110/7/2110/9/2110/11/2110/13/2110/15/2110/17/2110/19/2110/21/2110/23/2110/25/2110/27/2110/29/2110/31/21Elevation (ft msl)0
0.5
1
1.5
2
Precipitation (in)
Legend−Discharge Basin Elevation−Weir 3 Elevation
Notes:
Figure A1-B shows the discharge basin transducer data that was collected during the reporting period.
Raleigh, NC November 2021
Discharge Basin Water Elevation -
Seep B
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
A1-B
37
37.2
37.4
37.6
37.8
38
38.2
38.4
38.6
38.8
39
9/1/219/3/219/5/219/7/219/9/219/11/219/13/219/15/219/17/219/19/219/21/219/23/219/25/219/27/219/29/2110/1/2110/3/2110/5/2110/7/2110/9/2110/11/2110/13/2110/15/2110/17/2110/19/2110/21/2110/23/2110/25/2110/27/2110/29/2110/31/21Elevation (ft msl)
Legend−Discharge Basin Water Elevation USGS Precipitation (daily totals)−River Stage Telemetry Precipitation (daily totals)−Weir 3 Elevation
Notes:
Raleigh, NC November 2021
Discharge Basin Water Elevation and
External Forcings - Seep B
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
A2-B
As water can flow through the flow-through cell both as a result of wet weather inflow and elevated river levels from flooding, Figure A2-B compares the available transducer data to precipitation from the
telemetry rain gauge installed at Seep A, which became available on October 10, 2021, and precipitation and river stage elevation data available from the USGS Huske Lock and Dam.
29
31
33
35
37
39
41
9/1/219/3/219/5/219/7/219/9/219/11/219/13/219/15/219/17/219/19/219/21/219/23/219/25/219/27/219/29/2110/1/2110/3/2110/5/2110/7/2110/9/2110/11/2110/13/2110/15/2110/17/2110/19/2110/21/2110/23/2110/25/2110/27/2110/29/2110/31/21Elevation (ft msl)0
0.5
1
1.5
2
Precipitation (in)
Legend−Influent Chamber/Impoundment Elevation
Notes:
Figure A3-B shows the influent transducer data that was collected during the reporting period.
Raleigh, NC November 2021
Inlet Chamber Water Elevation -
Seep B
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
A3-B
38
38.5
39
39.5
40
40.5
41
41.5
42
9/1/219/3/219/5/219/7/219/9/219/11/219/13/219/15/219/17/219/19/219/21/219/23/219/25/219/27/219/29/2110/1/2110/3/2110/5/2110/7/2110/9/2110/11/2110/13/2110/15/2110/17/2110/19/2110/21/2110/23/2110/25/2110/27/2110/29/2110/31/21Elevation (ft msl)
Legend−Inlet Chamber Water Elevation USGS Precipitation (daily totals)−River Stage Transducer Precipitation (daily totals)
Bypass Spillway Elevation
Notes:
Raleigh, NC November 2021
Inlet Chamber Water Elevation and
External Forcings - Seep B
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
A4-B
As water can flow through the Bypass Spillway both as a result of wet weather inflow and elevated river levels from flooding, Figure A4-B compares the available transducer data to precipitation from the
telemetry rain gauge installed at Seep A, which became available on October 10, 2021, and precipitation and river stage elevation data available from the USGS Huske Lock and Dam.
29
31
33
35
37
39
41
43
9/1/219/3/219/5/219/7/219/9/219/11/219/13/219/15/219/17/219/19/219/21/219/23/219/25/219/27/219/29/2110/1/2110/3/2110/5/2110/7/2110/9/2110/11/2110/13/2110/15/2110/17/2110/19/2110/21/2110/23/2110/25/2110/27/2110/29/2110/31/21Elevation (ft msl)0
0.5
1
1.5
2
Precipitation (in)
Legend−Discharge Basin Elevation Transducer Data Gap−Weir 3 Elevation
Notes:
Figure A1-C shows the discharge basin transducer data that was collected during the reporting period.
Transducer data from October 29, 20:45 to October 30, 13:00 and October 30, 16:45 to October 31, 12:00 was not retrieved. Section 3 describes the gaps in transducer data record.
Raleigh, NC November 2021 A1-C
Figure
Discharge Basin Water Elevation -
Seep C
Chemours Fayetteville Works
Fayetteville, North Carolina
37
37.5
38
38.5
39
39.5
40
9/1/219/3/219/5/219/7/219/9/219/11/219/13/219/15/219/17/219/19/219/21/219/23/219/25/219/27/219/29/2110/1/2110/3/2110/5/2110/7/2110/9/2110/11/2110/13/2110/15/2110/17/2110/19/2110/21/2110/23/2110/25/2110/27/2110/29/2110/31/21Elevation (ft msl)
Legend−Discharge Basin Water Elevation Transducer Data Gap−River Stage USGS Precipitation (daily totals)−Weir 3 Elevation Telemetry Precipitation (daily totals)
Notes:
Raleigh, NC November 2021 A2-C
Figure
Discharge Basin Water Elevation and
External Forcings - Seep C
Chemours Fayetteville Works
Fayetteville, North Carolina
Transducer data from October 29, 20:45 to October 30, 13:00 and October 30, 16:45 to October 31, 12:00 was not retrieved. Section 3 describes the gaps in transducer data record.
As water can flow through the flow-through cell both as a result of wet weather inflow and elevated river levels from flooding, Figure A2-C compares the available transducer data to precipitation from the
telemetry rain gauge installed at Seep C, which became available on October 10, 2021, and precipitation and river stage elevation data available from the USGS Huske Lock and Dam.
29
31
33
35
37
39
41
9/1/219/3/219/5/219/7/219/9/219/11/219/13/219/15/219/17/219/19/219/21/219/23/219/25/219/27/219/29/2110/1/2110/3/2110/5/2110/7/2110/9/2110/11/2110/13/2110/15/2110/17/2110/19/2110/21/2110/23/2110/25/2110/27/2110/29/2110/31/21Elevation (ft msl)0
0.5
1
1.5
2
Precipitation (in)
Legend−Influent Chamber/Impoundment Elevation
Notes:
Figure A3-C shows the influent transducer data that was collected during the reporting period.
Raleigh, NC November 2021
Figure
A3-C
Fayetteville, North Carolina
Inlet Chamber Water Elevation -
Seep C
Chemours Fayetteville Works
39
39.5
40
40.5
41
41.5
42
42.5
43
9/1/219/3/219/5/219/7/219/9/219/11/219/13/219/15/219/17/219/19/219/21/219/23/219/25/219/27/219/29/2110/1/2110/3/2110/5/2110/7/2110/9/2110/11/2110/13/2110/15/2110/17/2110/19/2110/21/2110/23/2110/25/2110/27/2110/29/2110/31/21Elevation (ft msl)
Legend−Inlet Chamber Water Elevation USGS Precipitation (daily totals)−River Stage Telemetry Precipitation (daily totals)
Bypass Spillway Elevation
Notes:
Raleigh, NC November 2021 A4-C
Inlet Chamber Water Elevation and
External Forcings - Seep C
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
As water can flow through the Bypass Spillway both as a result of wet weather inflow and elevated river levels from flooding, Figure A4-C compares the available transducer data to precipitation from the telemetry
rain gauge installed at Seep C, which became available on October 10, 2021, and precipitation and river stage elevation data available from the USGS Huske Lock and Dam.
29
31
33
35
37
39
41
43
9/1/219/3/219/5/219/7/219/9/219/11/219/13/219/15/219/17/219/19/219/21/219/23/219/25/219/27/219/29/2110/1/2110/3/2110/5/2110/7/2110/9/2110/11/2110/13/2110/15/2110/17/2110/19/2110/21/2110/23/2110/25/2110/27/2110/29/2110/31/21Elevation (ft msl)0
0.5
1
1.5
2
Precipitation (in)
Legend−Discharge Basin Elevation−Weir 3 Elevation
Notes:
Figure A1-D shows the discharge basin transducer data that was collected during the reporting period.
Raleigh, NC November 2021
Discharge Basin Water Elevation -
Seep D
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
A1-D
37
37.2
37.4
37.6
37.8
38
38.2
38.4
38.6
38.8
39
9/1/219/3/219/5/219/7/219/9/219/11/219/13/219/15/219/17/219/19/219/21/219/23/219/25/219/27/219/29/2110/1/2110/3/2110/5/2110/7/2110/9/2110/11/2110/13/2110/15/2110/17/2110/19/2110/21/2110/23/2110/25/2110/27/2110/29/2110/31/21Elevation (ft msl)
Legend−Discharge Basin Water Elevation USGS Precipitation (daily totals)−River Stage Telemetry Precipitation (daily totals)−Weir 3 Elevation
Notes:
Raleigh, NC November 2021
Discharge Basin Water Elevation and
External Forcings - Seep D
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
A2-D
As water can flow through the flow-through cell both as a result of wet weather inflow and elevated river levels from flooding, Figure A2-D compares the available transducer data to precipitation from the
telemetry rain gauge installed at Seep C, which became available on October 10, 2021, and precipitation and river stage elevation data available from the USGS Huske Lock and Dam.
29
31
33
35
37
39
41
9/1/219/3/219/5/219/7/219/9/219/11/219/13/219/15/219/17/219/19/219/21/219/23/219/25/219/27/219/29/2110/1/2110/3/2110/5/2110/7/2110/9/2110/11/2110/13/2110/15/2110/17/2110/19/2110/21/2110/23/2110/25/2110/27/2110/29/2110/31/21Elevation (ft msl)0
0.5
1
1.5
2
Precipitation (in)
Legend−Influent Chamber/Impoundment Elevation
Notes:
Figure A3-D shows the influent transducer data that was collected during the reporting period.
Raleigh, NC November 2021
Inlet Chamber Water Elevation -
Seep D
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
A3-D
38
38.5
39
39.5
40
40.5
41
41.5
42
9/1/219/3/219/5/219/7/219/9/219/11/219/13/219/15/219/17/219/19/219/21/219/23/219/25/219/27/219/29/2110/1/2110/3/2110/5/2110/7/2110/9/2110/11/2110/13/2110/15/2110/17/2110/19/2110/21/2110/23/2110/25/2110/27/2110/29/2110/31/21Elevation (ft msl)
Legend−Inlet Chamber Water Elevation USGS Precipitation (daily totals)−River Stage Telemetry Precipitation (daily totals)
Bypass Spillway Elevation
Notes:
Raleigh, NC November 2021
Inlet Chamber Water Elevation and
External Forcings - Seep D
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
A4-D
As water can flow through the Bypass Spillway both as a result of wet weather inflow and elevated river levels from flooding, Figure A4-D compares the available transducer data to precipitation from the telemetry
rain gauge installed at Seep C, which became available on October 10, 2021, and precipitation and river stage elevation data available from the USGS Huske Lock and Dam.
29
31
33
35
37
39
41
43
9/1/219/3/219/5/219/7/219/9/219/11/219/13/219/15/219/17/219/19/219/21/219/23/219/25/219/27/219/29/2110/1/2110/3/2110/5/2110/7/2110/9/2110/11/2110/13/2110/15/2110/17/2110/19/2110/21/2110/23/2110/25/2110/27/2110/29/2110/31/21Elevation (ft msl)0
0.5
1
1.5
2
Precipitation (in)

TR0795A

APPENDIX B
Laboratory Analytical Data Review Narrative
(Full lab reports to be uploaded to OneDrive and EQuIS)

ADQM Data Review
Site: Chemours Fayetteville
Project: Seep Flow Through Cell Sampling 2021 (select lots)
Project Reviewer: Michael Aucoin

Sample Summary
Field Sample ID Lab Sample ID Sample Matrix Filtered Sample Date Sample Time Sample Purpose
SEEP-B-INFLUENT-210-090921 320-78765-1 Other liquid N 09/09/2021 12:00 FS
SEEP-B-EFFLUENT-210-090921 320-78765-2 Other liquid N 09/09/2021 12:00 FS
SEEP-A-INFLUENT-
336-091421 320-79069-
1 Other liquid N 09/14/2021 18:00 FS
SEEP-A-EFFLUENT-336-091421 320-79069-2 Other liquid N 09/14/2021 18:00 FS
SEEP-C-INFLUENT-336-091421 320-79069-3 Other liquid N 09/14/2021 18:00 FS
SEEP-C-EFFLUENT-336-091421 320-79069-4 Other liquid N 09/14/2021 18:00 FS
SEEP-D-INFLUENT-318-091421 320-79069-5 Other liquid N 09/14/2021 18:00 FS
SEEP-D-EFFLUENT-336-091421 320-79069-6 Other liquid N 09/14/2021 18:00 FS
SEEP-A-EFFLUENT-336-091421-D 320-79069-7 Other liquid N 09/14/2021 18:00 DUP SEEP-FBLK-091421 320-79069-8 Blank Water N 09/14/2021 17:00 FB SEEP-A-INFLUENT-RAIN-24-092221 320-79419-1 Other liquid N 09/22/2021 09:02 FS
SEEP-A-EFFLUENT-RAIN-24-092221 320-79419-2 Other liquid N 09/22/2021 09:07 FS SEEP-C-INFLUENT-RAIN-24-092321 320-79419-3 Other liquid N 09/23/2021 14:15 FS
SEEP-C-EFFLUENT-RAIN-24-092321 320-79419-4 Other liquid N 09/23/2021 14:15 FS SEEP-D-INFLUENT-RAIN-24-092321 320-79419-5 Other liquid N 09/23/2021 11:21 FS
SEEP-D-EFFLUENT-320-79419-6 Other liquid N 09/23/2021 11:13 FS

RAIN-24-092321
SEEP-B-
EFFLUENT-RAIN-24-092221 320-79419-7 Other liquid N 09/22/2021 10:50 FS
SEEP-B-INFLUENT-RAIN-24-092221 320-79419-8 Other liquid N 09/22/2021 10:05 FS
SEEP-EQBLK-092221 320-79419-9 Blank Water N 09/22/2021 10:00 EB
SEEP-B-INFLUENT-330-092321 320-79639-1 Other liquid N 09/23/2021 11:01 FS
SEEP-B-
EFFLUENT-336-092321 320-79639-2 Other liquid N 09/23/2021 11:00 FS SEEP-A-INFLUENT-252-100121 320-79696-1 Other liquid N 10/01/2021 06:03 FS SEEP-A-EFFLUENT-336-100121 320-79696-2 Other liquid N 10/01/2021 12:01 FS
SEEP-B-EFFLUENT-168-100121 320-79696-3 Other liquid N 10/01/2021 06:00 FS
SEEP-B-INFLUENT-168-100121 320-79696-4 Other liquid N 10/01/2021 06:00 FS
SEEP-C-
INFLUENT-330-100121 320-79696-5 Other liquid N 10/01/2021 12:01 FS SEEP-C-EFFLUENT-336-100121 320-79696-6 Other liquid N 10/01/2021 12:01 FS SEEP-D-INFLUENT-336-100121 320-79696-7 Other liquid N 10/01/2021 12:01 FS SEEP-FBLK-100121 320-79696-8 Blank Water N 10/01/2021 15:00 FB
SEEP-D-
EFFLUENT-330-100121 320-79696-9 Other liquid N 10/01/2021 06:01 FS SEEP-A-EFFLUENT-RAIN-24-101021 320-80482-1 Other liquid N 10/10/2021 14:15 FS
SEEP-A-INFLUENT-RAIN-24-101021 320-80482-2 Other liquid N 10/10/2021 14:28 FS SEEP-B-INFLUENT-336-101521 320-80526-1 Other liquid N 10/15/2021 10:00 FS

SEEP-FBLK-
101521
320-80526-
10 Blank Water N 10/15/2021 10:00 FB
SEEP-B-EFFLUENT-336-101521 320-80526-2 Other liquid N 10/15/2021 10:00 FS
SEEP-D-INFLUENT-282-101521 320-80526-3 Other liquid N 10/15/2021 10:00 FS SEEP-D-EFFLUENT-336-101521 320-80526-4 Other liquid N 10/15/2021 10:00 FS SEEP-C-INFLUENT-336-101521 320-80526-5 Other liquid N 10/15/2021 10:00 FS SEEP-C-EFFLUENT-
336-101521
320-80526-
6 Other liquid N 10/15/2021 10:00 FS
SEEP-A-INFLUENT-336-101521 320-80526-7 Other liquid N 10/15/2021 10:00 FS
SEEP-A-EFFLUENT-336-101521 320-80526-8 Other liquid N 10/15/2021 10:00 FS
SEEP-D-EFFLUENT-336-101521-D 320-80526-9 Other liquid N 10/15/2021 10:00 DUP
SEEP-A-INFLUENT-336-102921 320-81060-1 Other liquid N 10/29/2021 10:00 FS
SEEP-A-
EFFLUENT-336-102921 320-81060-2 Other liquid N 10/29/2021 10:00 FS SEEP-B-INFLUENT-198-102921 320-81060-3 Other liquid N 10/29/2021 10:00 FS SEEP-B-EFFLUENT-336-102921 320-81060-4 Other liquid N 10/29/2021 10:00 FS SEEP-C-INFLUENT-336-102921 320-81060-5 Other liquid N 10/29/2021 10:00 FS
SEEP-C-
EFFLUENT-336-102921 320-81060-6 Other liquid N 10/29/2021 10:00 FS SEEP-D-INFLUENT-336-102921 320-81060-7 Other liquid N 10/29/2021 10:00 FS SEEP-D-EFFLUENT-336-102921 320-81060-8 Other liquid N 10/29/2021 10:00 FS SEEP-B-INFLUENT-Rain-16-102621 320-81062-1 Other liquid N 10/26/2021 23:21 FS

SEEP-B-EFFLUENT-
Rain-24-102621 320-81062-2 Other liquid N 10/26/2021 23:28 FS SEEP-C-INFLUENT-Rain-21-102621 320-81062-3 Other liquid N 10/26/2021 23:27 FS SEEP-C-EFFLUENT-Rain-16-102621 320-81062-4 Other liquid N 10/26/2021 23:00 FS
SEEP-D-INFLUENT-Rain-21-
102621
320-81062-
5 Other liquid N 10/26/2021 23:01 FS
SEEP-D-EFFLUENT-Rain-24-102621 320-81062-6 Other liquid N 10/26/2021 23:01 FS SEEP-EQBLK-102621 320-81062-7 Blank Water N 10/26/2021 16:00 EB
* FS=Field Sample DUP=Field Duplicate FB=Field Blank EB=Equipment Blank TB=Trip Blank

Analytical Protocol

Lab Name Lab Method Parameter Category Sampling Program
Eurofins TestAmerica, Sacramento Cl. Spec. Table 3 Compound SOP
Per- and Polyfluorinated Alkyl Substances (PFAS) Seep Flow Through Cell Sampling 2021

ADQM Data Review Checklist

Item Description Yes No* DVM Narrative Report
Laboratory Report
Exception Report (ER) #
A
Did samples meet laboratory acceptability requirements upon receipt (i.e., intact, within temperature, properly preserved, and no headspace where applicable)? X
B Were samples received by the laboratory in agreement with the associated chain of custody? X
C Was the chain of custody properly completed by the laboratory and/or field team? X
D Were samples prepped/analyzed by the laboratory within method holding times? X
E
Were QA/QC criteria met by the laboratory (method blanks, LCSs/LCSDs, MSs/MSDs, PDSs, SDs, duplicates/replicates, surrogates, total/dissolved differences/RPDs, sample results within calibration range)?
X X
F Were field/equipment/trip blanks (if collected) detected at levels not requiring sample data qualification? X
G Were all data usable and not R qualified? X
ER# Description:

Other QA/QC Items to Note:

* See DVM Narrative Report, Lab Report, or ER # for further details as indicated.
The electronic data submitted for this project was reviewed via the Data Verification Module (DVM) process. The data is acceptable for use without qualification, except as noted on the attached DVM Narrative Report. The lab reports due to a large page count are stored on a network shared drive and are available to be posted on external shared drives, or on a flash drive.

Data Verification Module (DVM)
The DVM is an internal review process used by the ADQM group to assist with the determination of data usability. The electronic data deliverables received from the laboratory are loaded into the Locus EIM™ 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)/laboratory control sample duplicate (LCSD) recoveries and the RPD between these spikes
• Surrogate spike recoveries for organic analyses
• Difference/RPD between field duplicate sample pairs
• RPD between laboratory replicates for inorganic analyses
• Difference/percent difference between total and dissolved sample pairs There are two qualifier fields in EIM: 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. If the data has been validated by a third party, the field “Validated By” will be set to the validator (e.g., ESI for Environmental Standards, Inc.).
DVM Narrative ReportHigh relative percent difference (RPD) observed between field duplicate and parent sample. The reported result may be imprecise.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Seep Flow Through Cell Sampling 2021AnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResult TypeField Sample IDPrepUnitsSEEP-D-EFFLUENT-336-10152110/15/2021 320-80526-4Hydrolyzed PSDA0.0052 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSEEP-D-EFFLUENT-336-10152110/15/2021 320-80526-4Hydrolyzed PSDA0.0052 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLPage 1 of 7
Uncertainty around the analysis of R-PSDA, Hydrolyzed PSDA and R-EVE; J-qualifier added to all detects in the data set, even if there was no matrixspike analyzed for that particular sample.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Seep Flow Through Cell Sampling 2021AnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResult TypeField Sample IDPrepUnitsSEEP-B-INFLUENT-210-09092109/09/2021 320-78765-1R-PSDA3.9 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-B-INFLUENT-210-09092109/09/2021 320-78765-1Hydrolyzed PSDA32 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-B-INFLUENT-210-09092109/09/2021 320-78765-1R-EVE1.9 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-A-EFFLUENT-336-09142109/14/2021 320-79069-2Hydrolyzed PSDA0.0063 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSEEP-A-EFFLUENT-336-09142109/14/2021 320-79069-2Hydrolyzed PSDA0.0065 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSEEP-A-EFFLUENT-336-091421-D09/14/2021 320-79069-7Hydrolyzed PSDA0.0057 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSEEP-A-INFLUENT-336-09142109/14/2021 320-79069-1R-PSDA2.3 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-A-INFLUENT-336-09142109/14/2021 320-79069-1Hydrolyzed PSDA26 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-A-INFLUENT-336-09142109/14/2021 320-79069-1R-EVE1.1 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-C-INFLUENT-336-09142109/14/2021 320-79069-3R-PSDA0.63 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-C-INFLUENT-336-09142109/14/2021 320-79069-3Hydrolyzed PSDA0.86 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-C-INFLUENT-336-09142109/14/2021 320-79069-3R-EVE0.61 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-D-INFLUENT-318-09142109/14/2021 320-79069-5R-PSDA0.54 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-D-INFLUENT-318-09142109/14/2021 320-79069-5Hydrolyzed PSDA1.3 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-D-INFLUENT-318-09142109/14/2021 320-79069-5R-EVE0.62 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-A-INFLUENT-RAIN-24-09222109/22/2021 320-79419-1R-PSDA1.8 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLPage 2 of 7
Uncertainty around the analysis of R-PSDA, Hydrolyzed PSDA and R-EVE; J-qualifier added to all detects in the data set, even if there was no matrixspike analyzed for that particular sample.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Seep Flow Through Cell Sampling 2021AnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResult TypeField Sample IDPrepUnitsSEEP-A-INFLUENT-RAIN-24-09222109/22/2021 320-79419-1Hydrolyzed PSDA22 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-A-INFLUENT-RAIN-24-09222109/22/2021 320-79419-1R-EVE0.83 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-B-EFFLUENT-RAIN-24-09222109/22/2021 320-79419-7Hydrolyzed PSDA0.011 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSEEP-B-INFLUENT-RAIN-24-09222109/22/2021 320-79419-8R-PSDA4.2 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-B-INFLUENT-RAIN-24-09222109/22/2021 320-79419-8Hydrolyzed PSDA31 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-B-INFLUENT-RAIN-24-09222109/22/2021 320-79419-8R-EVE2.8 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-C-INFLUENT-RAIN-24-09232109/23/2021 320-79419-3R-PSDA0.53 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-C-INFLUENT-RAIN-24-09232109/23/2021 320-79419-3Hydrolyzed PSDA0.70 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-C-INFLUENT-RAIN-24-09232109/23/2021 320-79419-3R-EVE0.48 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-D-INFLUENT-RAIN-24-09232109/23/2021 320-79419-5R-PSDA0.56 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-D-INFLUENT-RAIN-24-09232109/23/2021 320-79419-5Hydrolyzed PSDA1.4 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-D-INFLUENT-RAIN-24-09232109/23/2021 320-79419-5R-EVE0.46 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-B-EFFLUENT-336-09232109/23/2021 320-79639-2R-PSDA0.0043 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSEEP-B-EFFLUENT-336-09232109/23/2021 320-79639-2Hydrolyzed PSDA0.023 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSEEP-B-EFFLUENT-336-09232109/23/2021 320-79639-2R-EVE0.0037 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSEEP-B-INFLUENT-330-09232109/23/2021 320-79639-1R-PSDA5.1 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-B-INFLUENT-330-09232109/23/2021 320-79639-1Hydrolyzed PSDA42 UG/LCl. Spec. Table 3CompoundJPFAS_DI_Prep0.038PQLPage 3 of 7
Uncertainty around the analysis of R-PSDA, Hydrolyzed PSDA and R-EVE; J-qualifier added to all detects in the data set, even if there was no matrixspike analyzed for that particular sample.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Seep Flow Through Cell Sampling 2021AnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResult TypeField Sample IDPrepUnitsSOPSEEP-B-INFLUENT-330-09232109/23/2021 320-79639-1R-EVE3.1 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-A-EFFLUENT-336-10012110/01/2021 320-79696-2Hydrolyzed PSDA0.0026 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSEEP-A-INFLUENT-252-10012110/01/2021 320-79696-1R-PSDA2.7 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-A-INFLUENT-252-10012110/01/2021 320-79696-1Hydrolyzed PSDA28 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-A-INFLUENT-252-10012110/01/2021 320-79696-1R-EVE1.1 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-C-EFFLUENT-336-10012110/01/2021 320-79696-6R-PSDA0.14 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.014PQLSEEP-C-EFFLUENT-336-10012110/01/2021 320-79696-6Hydrolyzed PSDA0.15 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0076PQLSEEP-C-EFFLUENT-336-10012110/01/2021 320-79696-6R-EVE0.11 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.014PQLSEEP-C-INFLUENT-330-10012110/01/2021 320-79696-5R-PSDA1.2 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-C-INFLUENT-330-10012110/01/2021 320-79696-5Hydrolyzed PSDA1.5 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-C-INFLUENT-330-10012110/01/2021 320-79696-5R-EVE1.0 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-B-EFFLUENT-168-10012110/01/2021 320-79696-3Hydrolyzed PSDA0.0062 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSEEP-B-INFLUENT-168-10012110/01/2021 320-79696-4R-PSDA7.1 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-B-INFLUENT-168-10012110/01/2021 320-79696-4Hydrolyzed PSDA54 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-B-INFLUENT-168-10012110/01/2021 320-79696-4R-EVE4.4 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-D-INFLUENT-336-10012110/01/2021 320-79696-7R-PSDA1.2 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLPage 4 of 7
Uncertainty around the analysis of R-PSDA, Hydrolyzed PSDA and R-EVE; J-qualifier added to all detects in the data set, even if there was no matrixspike analyzed for that particular sample.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Seep Flow Through Cell Sampling 2021AnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResult TypeField Sample IDPrepUnitsSEEP-D-INFLUENT-336-10012110/01/2021 320-79696-7Hydrolyzed PSDA2.6 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-D-INFLUENT-336-10012110/01/2021 320-79696-7R-EVE1.1 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-A-INFLUENT-RAIN-24-10102110/10/2021 320-80482-2R-PSDA1.7 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-A-INFLUENT-RAIN-24-10102110/10/2021 320-80482-2Hydrolyzed PSDA19 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-A-INFLUENT-RAIN-24-10102110/10/2021 320-80482-2R-EVE0.71 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-A-INFLUENT-336-10152110/15/2021 320-80526-7R-PSDA2.3 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-A-INFLUENT-336-10152110/15/2021 320-80526-7Hydrolyzed PSDA27 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-A-INFLUENT-336-10152110/15/2021 320-80526-7R-EVE1.1 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-B-EFFLUENT-336-10152110/15/2021 320-80526-2Hydrolyzed PSDA0.0036 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSEEP-B-INFLUENT-336-10152110/15/2021 320-80526-1R-PSDA4.1 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-B-INFLUENT-336-10152110/15/2021 320-80526-1Hydrolyzed PSDA30 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-B-INFLUENT-336-10152110/15/2021 320-80526-1R-EVE2.6 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-C-INFLUENT-336-10152110/15/2021 320-80526-5R-PSDA0.60 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-C-INFLUENT-336-10152110/15/2021 320-80526-5Hydrolyzed PSDA0.72 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-C-INFLUENT-336-10152110/15/2021 320-80526-5R-EVE0.54 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-D-INFLUENT-282-10152110/15/2021 320-80526-3R-PSDA0.75 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-D-INFLUENT-282-10152110/15/2021 320-80526-3Hydrolyzed PSDA1.6 UG/LCl. Spec. Table 3CompoundJPFAS_DI_Prep0.038PQLPage 5 of 7
Uncertainty around the analysis of R-PSDA, Hydrolyzed PSDA and R-EVE; J-qualifier added to all detects in the data set, even if there was no matrixspike analyzed for that particular sample.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Seep Flow Through Cell Sampling 2021AnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResult TypeField Sample IDPrepUnitsSOPSEEP-D-INFLUENT-282-10152110/15/2021 320-80526-3R-EVE0.68 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-A-INFLUENT-336-10292110/29/2021 320-81060-1R-PSDA2.6 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-A-INFLUENT-336-10292110/29/2021 320-81060-1Hydrolyzed PSDA30 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-A-INFLUENT-336-10292110/29/2021 320-81060-1R-EVE1.2 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-B-INFLUENT-198-10292110/29/2021 320-81060-3R-PSDA3.5 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-B-INFLUENT-198-10292110/29/2021 320-81060-3Hydrolyzed PSDA32 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-B-INFLUENT-198-10292110/29/2021 320-81060-3R-EVE1.8 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-B-INFLUENT-Rain-16-10262110/26/2021 320-81062-1R-PSDA3.2 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-B-INFLUENT-Rain-16-10262110/26/2021 320-81062-1Hydrolyzed PSDA28 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-B-INFLUENT-Rain-16-10262110/26/2021 320-81062-1R-EVE1.9 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-C-INFLUENT-336-10292110/29/2021 320-81060-5R-PSDA0.83 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-C-INFLUENT-336-10292110/29/2021 320-81060-5Hydrolyzed PSDA0.98 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-C-INFLUENT-336-10292110/29/2021 320-81060-5R-EVE0.69 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-C-INFLUENT-Rain-21-10262110/26/2021 320-81062-3R-PSDA0.79 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-C-INFLUENT-Rain-21-10262110/26/2021 320-81062-3Hydrolyzed PSDA1.0 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-C-INFLUENT-Rain-21-10262110/26/2021 320-81062-3R-EVE0.70 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLPage 6 of 7
Uncertainty around the analysis of R-PSDA, Hydrolyzed PSDA and R-EVE; J-qualifier added to all detects in the data set, even if there was no matrixspike analyzed for that particular sample.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Seep Flow Through Cell Sampling 2021AnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResult TypeField Sample IDPrepUnitsSEEP-D-INFLUENT-336-10292110/29/2021 320-81060-7R-PSDA0.89 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-D-INFLUENT-336-10292110/29/2021 320-81060-7Hydrolyzed PSDA1.9 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-D-INFLUENT-336-10292110/29/2021 320-81060-7R-EVE0.69 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-D-INFLUENT-Rain-21-10262110/26/2021 320-81062-5R-PSDA0.78 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-D-INFLUENT-Rain-21-10262110/26/2021 320-81062-5Hydrolyzed PSDA1.7 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-D-INFLUENT-Rain-21-10262110/26/2021 320-81062-5R-EVE0.66 UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLPage 7 of 7