2021.10.21_CCOA.p.2a_SeepDEffectivenessReport

TR0795A ii October 2021
TABLE OF CONTENTS
1 INTRODUCTION ....................................................................................................................1
2 SEEP D CONSTRUCTION .....................................................................................................2
2.1 Permits Obtained .............................................................................................................2
2.2 Construction and Startup Sequence .................................................................................2
3 SEEP D PERFORMANCE EVALUATION............................................................................3 3.1 Base Flow Capture ..........................................................................................................3
3.1.1 System Flowrate ..................................................................................................3
3.1.2 Bypass Flow ........................................................................................................3
3.2 PFAS Removal ................................................................................................................4
3.2.1 Performance Monitoring Sampling .....................................................................4
3.2.2 Performance Monitoring Sampling Results ........................................................4
3.2.3 System Effectiveness ...........................................................................................4
4 SUMMARY ..............................................................................................................................6
5 REFERENCES .........................................................................................................................7

TR0795A iii October 2021
LIST OF TABLES
Table 1 Sampling Summary (August - September 2021)
Table 2 Performance Monitoring Analytical Results (August - September 2021)

LIST OF FIGURES
Figure 1 River Level and FTC As-Built Elevations (August 2021 - September 2021)
Figure 2 Measured Discharge Flowrate (August - September 2021)
Figure 3 Influent Water Elevation (August - September 2021)

LIST OF APPENDICES
Appendix A Section 401 WQC/Section 404 Certificate of Completion
Appendix B Bladen County NCDEQ Stormwater Permit
Appendix C Civil As-Built Record Drawings
Appendix D Mechanical As-Built Record Drawings
Appendix E Transducer Data Reduction
Appendix F Laboratory Analytical Data Review Narrative

TR0795A iv October 2021
LIST OF ACRONYMS AND ABBREVIATIONS
CO Addendum Addendum to Consent Order Paragraph 12
ESB Effluent Stilling Basin
FTC flow-through cell
GAC granular activated carbon
gpm gallons per minute
HFPO-DA hexafluoropropylene oxide dimer
IC Inlet Chamber
ISB influent Stilling Basin
ng/L nanograms per liter
NCDEQ North Carolina Department of Environmental Quality
NCDPS North Carolina Department of Public Safety
NCNFIP Division of Emergency Management National Flood Insurance Program
O&M Operations and Maintenance
PFAS per- and polyfluoroalkyl substances
PFMOAA perfluoro-2-methoxyaceticacid
PMPA perfluoromethoxypropyl carboxylic acid
USACE United States Army Corps of Engineers
WQC Water Quality Certification

TR0795A 1 October 2021
1 INTRODUCTION
Geosyntec Consultants of NC, P.C. (Geosyntec) has prepared this Interim Seep Remediation Seep
D Effectiveness Demonstration Report (“Effectiveness Report”) on behalf of The Chemours
Company FC, LLC (Chemours). This report provides a record of construction completion and
demonstration of interim effectiveness for the flow-through cell (FTC) installed as the interim
remediation system at Seep D at the Chemours Fayetteville Works Site (the Site).
Pursuant to requirements of Paragraph 2(a)(vi) of the Addendum to Consent Order Paragraph 12
(CO Addendum), within four months after the construction of each seep’s FTC, Chemours shall
submit a report demonstrating that:
i. the FTC intercepted total base flow (during dry weather flow) at each seep; and
ii. removed per- and polyfluoroalkyl substances (PFAS) - as measured by influent and
effluent concentrations of indicator parameters hexafluoropropylene oxide dimer
(HFPO-DA), perfluoromethoxypropyl carboxylic acid (PMPA), and perfluoro-2-
methoxyaceticacid (PFMOAA) - at a minimum removal efficiency of 80% on a
monthly average basis (the “Interim Effectiveness Demonstration”) for each of the
second and third full calendar months of operation.
Construction was complete at Seep D on June 24, 2021, and startup commenced thereafter.
Therefore, this Effectiveness Report details the performance record of August and September 2021
(the second and third full calendar months of operation, respectively). Note that the fourth
Operations and Maintenance (O&M) Report was submitted on September 30, 2021 (O&M Report
#4, Geosyntec, 2021) for the reporting period of July 1, 2021 through August 31, 2021; therefore,
some overlap in data presentation (August 2021) is included herein.
As the O&M Report #1 from March 31, 2021 presented performance data for the first time,
information was provided that is generally applicable to all four FTCs regarding hydraulic
mechanics, 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
Effectiveness Report, 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.

TR0795A 2 October 2021
2 SEEP D CONSTRUCTION
This section describes the regulatory permits that were obtained for the Seep D FTC, and the
construction and startup sequence that was performed immediately following.
2.1 Permits Obtained
The following permits were obtained prior to construction:
• December 18, 2020: Section 401 Water Quality Certification (WQC) and Section 404
Permit, permit modification to SAW-2019-00206, from NCDEQ and the United States
Army Corps of Engineers (USACE) respectively, was previously provided in Appendix A
of the Seep A Effectiveness Report (Geosyntec 2021). The original permit was authorized
for Seep C on October 5, 2020, and was modified for Seeps A, B, and D. Proof of payment
of stream and wetland mitigation credits for Seeps A, B, and D was submitted on December
29, 2020 and the USACE issued approval for in-stream construction that same day. The
Certificate of Completion for Seeps A, B, and D is provided in Appendix A.
• January 14, 2021: Stormwater discharge (i.e., land disturbance) permit from Bladen
County, North Carolina Department of Environmental Quality (NCDEQ), project ID
BLADE-2021-009 (for Seep D), provided herein as Appendix B.
2.2 Construction and Startup Sequence
Construction initiated with access road and laydown area clearing and grading on March 16, 2021.
In-stream construction began on April 8, 2021 and was completed on April 12, with sheet pile
installation beginning immediately after. As shown in the civil as-built record drawings (Appendix
C), two rows of sheet pile were installed (the upgradient and downgradient faces of the FTC).
Concrete formwork began on April 26, with the slab and walls poured on May 20. Mechanical
work (piping and valving) began on May 28. The mechanical as-built record drawings are provided
in Appendix D. Hydrostatic testing to evaluate the water tightness of each FTC chamber was
performed on June 22. The FTC was put into service on June 24.

TR0795A 3 October 2021
3 SEEP D PERFORMANCE EVALUATION
The following sections describe the evaluation of base flow capture and PFAS removal efficiency,
per the requirements of Paragraph 2(a)(vi).
The elevation of the Cape Fear River relative to key elevations of the FTC for the August –
September reporting period is shown in Figure 1. The river elevation was not a factor that affected
the Seep D FTC performance during the reporting period but is shown for consistency between
other Seep reports.
3.1 Base Flow Capture
3.1.1 System Flowrate
A detailed discussion of pressure transducer water level measurements in the Effluent Stilling
Basin (ESB), 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 (March 31, 2021). This data reduction process,
updated for the Effectiveness Report period of August - September 2021, is provided in Appendix
E.
Figure 2 shows the measurable discharge flowrates through the FTC over the reporting period. The
median of the measured flowrate through the FTC during the reporting period was 122 gallons per
minute (gpm), as compared to the pre-design median value of 150 gpm (from flumes prior to
construction). It should be noted that due to schedule limitations, the available pre-design data set
for Seep D was much smaller than the other Seeps (only 7 days of dry weather and 7 days of wet
weather data were available). Therefore, this pre-design median value of 150 gpm may have been
biased high.
The calculated 95th percentile value of treated flow over the reporting period was 304 gpm, as
compared to the 95th percentile value of pre-design dry weather base flow (the design basis
treatment flow) of 183 gpm. The higher value of calculated 95th percentile of treated flow, as
compared to the design basis dry weather flow, is attributed to capture of wet weather flow by the
system. Based on these results, the system is capable of treating more than the design basis under
favorable hydraulic conditions.
Using the measured flowrate calculations, approximately 12,600,000 gallons of water was treated
by the FTC from August 1 through September 30, 2021.
3.1.2 Bypass Flow
A detailed 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 Effectiveness Report period of August - September 2021, is provided in
Appendix E.

TR0795A 4 October 2021
The resulting figure for influent water level elevation is provided in Figure 3. As shown, there was
no bypass flow in August and September. This is attributed to fairly dry conditions in these two
months and continued improvement in FTC operations. In August, approximately 2.73 inches of
rain fell, which is approximately half the historical average of 5.24 inches. In September,
approximately 2.68 inches of rain fell, which is approximately two-thirds the historical average of
4.30 inches. Overall, the total rainfall in the reporting period (5.41 inches) was approximately half
the historical average (9.53 inches).
Three separate rain events with at least 0.5 inches of rainfall occurred in August and September.
Maintenance events were conducted following each rain event to maintain good working
conditions. A total of seven GAC maintenance events were conducted to improve the processing
capacity of the system.
3.2 PFAS Removal
The sections that follow discuss the FTC performance monitoring sampling procedures, and
analytical results, and the overall efficiency of PFAS removal by the FTC.
3.2.1 Performance Monitoring Sampling
Five performance monitoring samples – a minimum of twice per calendar month per CO
Addendum Paragraph 2(a)(iii) – were collected during this reporting period (Table 1). Sampling
procedures using the Teledyne autosamplers are described in Section 3.3.1 in the O&M Report #1.
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). The
Laboratory Analytical Data Review Narrative is provided in Appendix F. Full lab reports will be
uploaded to OneDrive and EquIS.
3.2.2 Performance Monitoring Sampling Results
Analytical results for the five composite performance monitoring samples are provided in Table 2
and described below.
Total Table 3+ PFAS compounds (17 compounds) in the influent ranged from 89,000 to 180,000
nanograms per liter (ng/L). The average and median total Table 3+ (17 compounds) concentrations
were approximately 110,000 and 100,000 ng/L, respectively. Within each influent sample, the
constituents of highest concentration were PFMOAA, PFO2HxA, and HFPO-DA.
Total Table 3+ PFAS compounds (17 compounds) in the effluent ranged from non-detect in all
compounds, up to 36 ng/L, representing a minimum removal efficiency of 99.97% in the five
composite samples.
3.2.3 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

TR0795A 5 October 2021
average basis for the system using volume weighted concentrations of the influent and effluent
samples. Volume weighted concentrations were developed so that if 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 3.1.1) and the performance monitoring composite
sample data of the three indicator compounds (Section 3.2.2), the monthly average system
effectiveness was calculated to be 99.99% and >99.99% for August and September 2021,
respectively. This value is similar to the Table 3+ removal efficiency described in Section 3.2.2
which is due to the fact that the removal efficiency was mostly steady throughout the reporting
period, and that the influent and effluent composite periods were nearly identical.

TR0795A 6 October 2021
4 SUMMARY
The following summarizes the evaluation of Seep D FTC’s effectiveness at capturing total
baseflow and removing PFAS for the second and third full calendar months of operation (August
and September 2021).
• Flow data from the FTC demonstrates the system can treat more than the design basis flow
rate under favorable hydraulic conditions (i.e., the 95th percentile of measured flow was
304 gpm as compared to the pre-construction estimated 95th percentile of dry weather flow
value of 183 gpm). The Seep D FTC treated both dry and wet weather flow intercepted by
the FTC during the reporting period.
• Performance monitoring results from the composite samples indicate the removal
efficiency, based on the Total Table 3+ 17 Compounds, was at least 99.97% and on average
was 99.99%. The System Effectiveness flow-weighted calculation yielded a similar result
(99.99% in August and >99.99% in September). The system prevented an estimated 11.55
lbs of PFAS from being discharged to the Cape Fear River during the reporting period.

TR0795A 7 October 2021
5 REFERENCES
Geosyntec, 2020. Interim Seep Remediation System Plan. Chemours Fayetteville Works. 31
August 2020.
Geosyntec, 2021. Interim Seep Remediation System Plan Operations and Maintenance Report #1.
Chemours Fayetteville Works. 31 March 2021.
Geosyntec, 2021. Interim Seep Remediation Seep C Effectiveness Demonstration Report.
Chemours Fayetteville Works. 16 April 2021.
Geosyntec, 2021. Interim Seep Remediation System Plan Operations and Maintenance Report #2.
Chemours Fayetteville Works. 28 May 2021.
Geosyntec, 2021. Interim Seep Remediation System Plan Operations and Maintenance Report #3.
Chemours Fayetteville Works. 30 July 2021.
Geosyntec, 2021. Interim Seep Remediation Seep A Effectiveness Demonstration Report.
Chemours Fayetteville Works. 26 August 2021.
Geosyntec, 2021. Interim Seep Remediation System Plan Operations and Maintenance Report #4.
Chemours Fayetteville Works. 30 September 2021.

TR0795A
TABLES

Table 1
Sampling Summary - Seep D
(August - September 2021)
Chemours Fayetteville Works
Fayetteville, North Carolina
Sample ID Composite Period
SEEP-D-INFLUENT-306-081721
SEEP-D-EFFLUENT-336-081721
SEEP-D-INFLUENT-24-082021
SEEP-D-EFFLUENT-24-082021
SEEP-D-INFLUENT-24-082821
SEEP-D-EFFLUENT-24-082821
SEEP-D-INFLUENT-318-091421
SEEP-D-EFFLUENT-336-091421
SEEP-D-INFLUENT-336-100121
SEEP-D-EFFLUENT-330-100121
Sample ID Sample Date Sample Time Cumulative Rainfall
(inches)
SEEP-D-INFLUENT-RAIN-24-081821
SEEP-D-EFFLUENT-RAIN-24-081821
SEEP-D-INFLUENT-RAIN-24-092321
SEEP-D-EFFLUENT-RAIN-24-092321
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 obtained from the USGS gauge #02105500 at the William O. Huske Lock and Dam
Wet Weather Composite Sample
Performance Monitoring Composite Samples
Sample Date
August 19 - August 20, 2021 August 20, 2021
August 3 - August 17, 2021 August 17, 2021
August 28, 2021August 27 - August 28, 2021
The Seep A autosamplers malfunctioned from August 17-19, interrupting the collection of aliquots early in the 14-day composite cycle. O&M staff re-
programmed the Seep D samplers to be consistent with Seep A and collect two, 24-hour composites on August 20 and 28 to complete the monthly
sampling program.
September 1 - September 14, 2021 September 14, 2021
September 17 - October 1, 2021 October 1, 2021
September 23, 2021 11:13 0.79
August 18, 2021 19:00 0.43
TR0795A Page 1 of 1 October 2021
Table 2
Summary of Performance Monitoring Analytical Results - Seep D
(August - September 2021)
Chemours Fayetteville Works
Fayetteville, NC
Percent Removal
Hfpo Dimer Acid 11,000 <2.0 100.0%13,000 5.3 > 99.9%12,000 <2.0 100.0%
PFMOAA 55,000 <2.0 UJ 100.0%60,000 15 > 99.9%45,000 <2.0 100.0%PFO2HxA 18,000 <2.0 100.0%18,000 11 99.9%17,000 <2.0 100.0%PFO3OA 5,100 <2.0 100.0%5,500 4.4 99.9%5,000 <2.0 100.0%PFO4DA 1,400 <2.0 100.0%1,600 <2.0 100.0%1,500 <2.0 100.0%PFO5DA <78 <2.0 100.0%110 <2.0 100.0%<78 <2.0 100.0%PMPA 7,100 <10 100.0%7,000 <10 100.0%5,100 <10 100.0%PEPA 1,600 <20 100.0%1,900 <20 100.0%1,700 <20 100.0%PS Acid <20 <2.0 100.0%<20 <2.0 100.0%<20 <2.0 100.0%Hydro-PS Acid 220 <2.0 100.0%270 <2.0 100.0%250 <2.0 100.0%R-PSDA 730 J <2.0 100.0%560 J <2.0 100.0%430 J <2.0 100.0%Hydrolyzed PSDA 2,000 <2.0 100.0%1,300 J <2.0 100.0%980 J <2.0 100.0%R-PSDCA <17 <2.0 100.0%<17 <2.0 100.0%<17 <2.0 100.0%
NVHOS, Acid Form 720 <2.0 100.0%630 <2.0 100.0%560 <2.0 100.0%
EVE Acid <17 <2.0 100.0%<17 <2.0 100.0%<17 <2.0 100.0%
Hydro-EVE Acid 830 <2.0 100.0%950 <2.0 100.0%870 <2.0 100.0%
R-EVE 730 <2.0 100.0%580 J <2.0 100.0%320 J <2.0 100.0%
PES <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%
PFECA-G <48 <2.0 100.0%<48 <2.0 100.0%<48 <2.0 100.0%
Total Table 3+ (17 compounds)1,2 100,000 ND 100.0%110,000 36 > 99.9%89,000 ND 100.0%
Total Table 3+ (20 compounds)1 100,000 ND 100.0%110,000 36 > 99.9%91,000 ND 100.0%
Notes
1 - Total Table 3+ was calculated including J qualified data but not non-detect data.
The Total Table 3+ sum is rounded to two significant figures.
2 - Total Table 3+ (17 Compounds) does not include R-PSDA, Hydrolyzed PSDA
and R-EVE.
Bold - Analyte detected above associated reporting limit.
J - Analyte detected. Reported value may not be accurate or precise.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
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)
SEEP-D-INFLUENT-
306-081721
Sample Date:
17-Aug-21
SEEP-D-EFFLUENT-
336-081721
Sample Date:
17-Aug-21
SEEP-D-INFLUENT-
24-082021
Sample Date:
20-Aug-21
Percent Removal
SEEP-D-INFLUENT-
24-082821
Sample Date:
28-Aug-21
SEEP-D-EFFLUENT-
24-082821
Sample Date:
28-Aug-21
Percent Removal
SEEP-D-EFFLUENT-
24-082021
Sample Date:
20-Aug-21
TR0795A Page 1 of 2 October 2021
Table 2
Summary of Performance Monitoring Analytical Results - Seep D
(August - September 2021)
Chemours Fayetteville Works
Fayetteville, NC
Hfpo Dimer Acid
PFMOAA
PFO2HxA
PFO3OAPFO4DAPFO5DAPMPAPEPAPS AcidHydro-PS AcidR-PSDAHydrolyzed PSDA
R-PSDCA
NVHOS, Acid Form
EVE Acid
Hydro-EVE Acid
R-EVE
PES
PFECA B
PFECA-G
Total Table 3+ (17 compounds)1,2
Total Table 3+ (20 compounds)1
Notes
1 - Total Table 3+ was calculated including J qualified data but not non-detect data.
The Total Table 3+ sum is rounded to two significant figures.
2 - Total Table 3+ (17 Compounds) does not include R-PSDA, Hydrolyzed PSDA
and R-EVE.
Bold - Analyte detected above associated reporting limit.
J - Analyte detected. Reported value may not be accurate or precise.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure
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)
12,000 <2.0 100.0%25,000 <2.0 100.0%
46,000 <2.0 100.0%86,000 <2.0 100.0%21,000 <2.0 100.0%36,000 <2.0 100.0%6,400 <2.0 100.0%10,000 <2.0 100.0%1,700 <2.0 100.0%2,900 <2.0 100.0%<78 <2.0 100.0%160 <2.0 100.0%7,000 <10 100.0%11,000 <10 100.0%
2,300 <20 100.0%3,700 <20 100.0%<20 <2.0 100.0%<20 <2.0 100.0%
250 <2.0 100.0%430 <2.0 100.0%
540 J <2.0 100.0%1,200 J <2.0 100.0%
1,300 J <2.0 100.0%2,600 J <2.0 100.0%
<17 <2.0 100.0%<17 <2.0 100.0%
590 <2.0 100.0%1,100 <2.0 100.0%
<17 <2.0 100.0%<17 <2.0 100.0%
860 <2.0 100.0%1,500 <2.0 100.0%
620 J <2.0 100.0%1,100 J <2.0 100.0%
<6.7 <2.0 100.0%<6.7 <2.0 100.0%
<27 <2.0 100.0%<27 <2.0 100.0%
<48 <2.0 100.0%<48 <2.0 100.0%
98,000 ND 100.0%180,000 ND 100.0%
100,000 ND 100.0%180,000 ND 100.0%
Percent Removal
SEEP-D-INFLUENT-
336-100121
Sample Date:
01-Oct-21
SEEP-D-EFFLUENT-
330-100121
Sample Date:
01-Oct-21
SEEP-D-INFLUENT-
318-091421
Sample Date:
14-Sept-21
SEEP-D-EFFLUENT-
336-091421
Sample Date:
14-Sept-21
Percent Removal
TR0795A Page 2 of 2 October 2021

TR0795A

FIGURES

Legend
River
Notes:
As-built survey information from RMA Surveying October 2020 and Donaldson Garrett & Associates August 2021.
River elevation from USGS W.O. Huske Lock and Dam site 02105500, converted to NAVD88.
GAC = Granular Activated Carbon
Raleigh, NC October 2021
River Level & FTC As-Built Elevations - Seep
D
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
1
Top of WallSpillway
Top of GAC
Discharge Invert
25
30
35
40
45
50
55
01-Aug 16-Aug 31-Aug 15-Sep 30-SepElevation, feet above sea level, NAVD88River Elevation During Seep D Flow Through Cell Operation (8/01/2021 through 09/30/2021)
Legend−Measured Discharge Flowrate
122 138
304 323
564 763
Notes:
gpm - gallons per minute
Figure 2 depicts the measured discharge flowrate of water processed through the filter beds calculated using the Effluent Stilling Basin transducer data.
Raleigh, NC October 2021
Figure
2
Flowrate Statistics (gpm)
(08/01 -
09/30)Since Startup
Median
95th percentile
Max
Measured Discharge Flowrate - Seep D
Chemours Fayetteville Works
Fayetteville, North Carolina
0
100
200
300
400
500
600
700
800
8/1/218/5/218/9/218/13/218/17/218/21/218/25/218/29/219/2/219/6/219/10/219/14/219/18/219/22/219/26/219/30/21Flowrate (gpm)
Legend−Influent Chamber/Impoundment Water Elevation Precipitation (daily totals)
Bypass Spillway Elevation
Notes:
Figure 3 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.
Raleigh, NC October 2021
Influent Water Elevation - Seep D
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
3
38
38.5
39
39.5
40
40.5
41
41.5
42
42.5
43
8/1/218/5/218/9/218/13/218/17/218/21/218/25/218/29/219/2/219/6/219/10/219/14/219/18/219/22/219/26/219/30/21Elevation (ft msl)0
1
2
3
4
5
Precipitation (in)

TR0795A
APPENDIX A
Section 401 WQC/Section 404 Certificate of
Completion

TR0795A
APPENDIX B
Bladen County NCDEQ Stormwater Permit

Certificate of Coverage
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF ENERGY, MINERAL, AND LAND RESOURCES
GENERAL PERMIT NO. NCG010000
NC Reference No. NCG01-2021-0287
Certificate of Coverage No. NCC210287
STORMWATER DISCHARGES
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards and regulations
promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water
Pollution Control Act, as amended,
The Chemours Company
is hereby authorized to discharge stormwater associated with CONSTRUCTION ACTIVITIES to surface waters of North
Carolina from a site located at:
Seep D Remediation System
22828 NC-87
Hollow
Bladen County
in accordance with the effluent limitations, monitoring requirements, and other conditions set forth in N.C. General Permit
No. NCG010000.
This Certificate of Coverage is affiliated with E&SC Plan Project No. BLADE-2021-009
This Certificate of Coverage shall become effective 1/21/2021.
This Certificate of Coverage shall remain in effect until rescinded or expired.
This Certificate of Coverage will expire on the anniversary of its effective date unless it is renewed by payment of the
annual administration and compliance fee.

for Brian Wrenn
Director, Division of Energy, Mineral, and Land Resources
By the Authority of the Environmental Management Commission

TR0795A
APPENDIX C
Civil As-Built Record Drawings

CAPE FEAR RIVERXCAPE FEAR RIVERCAPE F
E
AR

RI
V
ER
45
46
44
43
42
474035
35 COVER SHEETPROJECT NUMBER:
43-20631D
DRAWING:
G-1
DESIGNED BY:
REVIEWED BY:DRAWN BY:
APPROVED BY:
TJD
NSS DKK
DAH
DATE:
SCALE:
AS SHOWN
November 9, 2020
Fayetteville, North Carolina
The Chemours Company
As-Built
Seep D Interim Remediation System
No.DateDescriptionBy:1Revisions23456November 9, 2020
Fayetteville, North CarolinaChemours Interim Seep D Remediation Project4/13/2021R1NSS8/30/2021As-BuiltNSS
CAPE FEAR RIVERWETLANDS
FLOWLINE
OF SEEP D
EXISTING CLEARED AREA
EQUIPMENT AND
MATERIAL STAGING AREA5%45
46
44
43
42
47403535ðððððððð
ððððððððEXISTING ROAD
ROADSIDE SWALE (TYP.)
Q10 = 0.33 CFS
V10 = 1.43 FPS
24.6
RIPRAP
ARMORED SLOPE
(TYP.)
SHEET PILE
INLET WEIR
EL 38.35
NORTH EMBANKMENT
CREST
EL 41.10
FILTER BOX T.B.D.
(BY OTHERS)
OUTLET PIPE TO SEEP FLOWLINE
WITH RIPRAP APRON
RIPRAP
ARMORED SLOPE
(TYP.)
MAINTENANCE PLATFORM
EL 41.25
ROADSIDE SWALE (TYP.)
Q10 = 0.43 CFS
V10 = 1.35 FPS
ðPROJECT NUMBER:
43-20631D
DRAWING:
C-1
DESIGNED BY:
REVIEWED BY:DRAWN BY:
APPROVED BY:
TJD
NSS DKK
DATE:
SCALE:
AS SHOWN
November 9, 2020
No.DateDescriptionBy:1Revisions23456CIVIL SITE PLANN Fayetteville, North CarolinaChemours Interim Seep D Remediation ProjectDAH
4/13/2021R1NSS2 8/30/2021As-BuiltNSS2
2
5%45
46
44
43
42
47403535ðððððððð
ðððððððððPROJECT NUMBER:
43-20631D
DRAWING:
C-2
DESIGNED BY:
REVIEWED BY:DRAWN BY:
APPROVED BY:
TJD
NSS DKK
DATE:
SCALE:
AS SHOWN
November 9, 2020
No.DateDescriptionBy:1Revisions23456ACCESS PLANN Fayetteville, North CarolinaChemours Interim Seep D Remediation ProjectDAH
4/13/2021R1NSS2 8/30/2021As-BuiltNSS2
PROJECT NUMBER:
43-20631D
DRAWING:
C-3
DESIGNED BY:
REVIEWED BY:DRAWN BY:
APPROVED BY:
NSS
DATE:
SCALE:
AS SHOWN
November 9, 2020
No.DateDescriptionBy:1Revisions23456CROSS -SECTIONSFayetteville, North CarolinaChemours Interim Seep D Remediation ProjectTJD
DKK
DAH
4/13/2021R1NSS2 8/30/2021As-BuiltNSS2
2
403535PROJECT NUMBER:
43-20631D
DRAWING:
C-4
DESIGNED BY:
REVIEWED BY:DRAWN BY:
APPROVED BY:
TJD
NSS DKK
DATE:
SCALE:
AS SHOWN
November 9, 2020
No.DateDescriptionBy:1Revisions23456SHEET PILE PLAN AND PROFILEFayetteville, North CarolinaChemours Interim Seep D Remediation ProjectN
DAH
4/13/2021R1NSS2
2
8/30/2021As-BuiltNSS2
2
2
PROJECT NUMBER:
43-20631D
DRAWING:
C-5
DESIGNED BY:
REVIEWED BY:DRAWN BY:
APPROVED BY:
NSS
DATE:
SCALE:
AS SHOWN
November 9, 2020
No.DateDescriptionBy:1Revisions23456IMPOUNDMENT SECTIONSFayetteville, North CarolinaChemours Interim Seep D Remediation ProjectTJD
DKK
DAH
4/13/2021R1NSS2 8/30/2021As-BuiltNSS2
2
2
1" PLATE
Ø 6" PIPE
Ø 10" PIPE
SLEEVE
SEALING
COMPOUND
LINK-SEAL
MODULAR SEAL
1" PLATE
SEALING
COMPOUND
LINK-SEAL
MODULAR SEAL
Ø 8" PIPE
Ø 12" PIPE
SLEEVE
SEALING
COMPOUND
Fayetteville, North CarolinaPROJECT NUMBER:
43-20631D
DRAWING:
D-1
DESIGNED BY:
REVIEWED BY:DRAWN BY:
APPROVED BY:
NSS
DATE:
SCALE:
AS SHOWN
November 9, 2020
No.DateDescriptionBy:1Revisions23456Typical DetailsChemours Interim Seep D Remediation ProjectTJD
DKK
DAH
4/13/2021R1NSS8/30/2021As-BuiltNSS
EXISTING
NATIVE EARTH
24" THI
C
K
6.0'
3'
6" MIN. SIZE
RIPRAP
3 1
12"
*USE 12" Ø CULVERT VALUES IN TABLE FOR 8" Ø PIPE DOWNSTREAM OF FILTER
BED (TYP) TO CONSTRUCT OUTLET PROTECTION.
*Fayetteville, North CarolinaPROJECT NUMBER:
43-20631D
DRAWING:
D-2
DESIGNED BY:
REVIEWED BY:DRAWN BY:
APPROVED BY:
NSS
DATE:
SCALE:
AS SHOWN
November 9, 2020
No.DateDescriptionBy:1Revisions23456Typical DetailsChemours Interim Seep D Remediation ProjectTJD
DKK
DAH
4/13/2021R1NSS8/30/2021As-BuiltNSS

TR0795A
APPENDIX D
Mechanical As-Built Record Drawings

© 2020 Microsoft
Corporat
ion © 2020
Maxar ©CNES (2020)
Dist
ribut
ion Airbus DS THE CHEMOURS COMPANYFAYETTEVILLE WORKS PROJECTSEEP D REMEDIATION SYSTEMMECHANICAL RECORD DRAWINGSWILLIS CREEK AND CAPE FEAR RIVER CORRIDORFAYETTEVILLE, BLADEN AND CUMBERLAND COUNTIESSTATE OF NORTH CAROLINAOCTOBER 2021VICINITY MAPSOURCE: U.S. BUREAU OF THE CENSUSSCALE: 1" = 30 MILESLOCATION MAPSOURCE: MICROSOFT CORPORATION BING MAPS 2017SCALE: 1" = 3,000'NN03,000SCALE IN FEETPREPARED FOR: PREPARED BY:22828 NC-87FAYETTEVILLE, NC 28306910.483.4681ATRIUM AT BLUE RIDGE2501 BLUE RIDGE ROAD, SUITE 430RALEIGH, NC 27607919.870.0576SITEF1EDC23BA1234567854678FEDCBATHE CHEMOURS COMPANYSEEP D INTERIM REMEDIATION SYSTEMPROJECT:SITE:TITLE:APPROVED BY:REVIEWED BY:DRAWING NO.:DRAWN BY:DESIGN BY:CHECKED BY:FILE:PROJECT NO.:DATE:OCTOBER 2021TR0795ADATEREVAPPDESCRIPTIONDRNATRIUM AT BLUE RIDGE2501 BLUE RIDGE ROAD, SUITE 430RALEIGH, NC 27607919.870.0576THIS DRAWING MAY NOT BE ISSUEDFOR PROJECT TENDER ORCONSTRUCTION, UNLESS SEALED.SIGNATUREDATEAS-BUILT CONSTRUCTIONRECORD DRAWINGSFAYETTEVILLE WORKS SITEAS-BUILT CONSTRUCTION RECORD DRAWING SUBMITTAL0 10.29.21JFHCASGEOSYNTEC-PW-01\DOCUMENTS\CLIENTS\C\CHEMOURS\TR0795A - CHEMOURS\CADD\05 - INTERIM REMEDIAL DESIGN - SEEP D\DRAWINGS\SHEETS\TR0795-G01
COVER SHEETCMDSJFHJWEJJDCASG-01TR0795-G01.dwgSEEP DLIST OF DRAWINGSDRAWING NO.DRAWING TITLEG-01COVER SHEETG-02NOTES AND SYMBOLSC-01CONSTRUCTION DETAILS IC-02CONSTRUCTION DETAILS IIC-03CONSTRUCTION DETAILS IIIC-04CONSTRUCTION DETAILS IVC-05PLATFORM DETAILSD-01PROCESS FLOW DIAGRAM
F1EDC23BA1234567854678FEDCBATHE CHEMOURS COMPANYSEEP D INTERIM REMEDIATION SYSTEMPROJECT:SITE:TITLE:APPROVED BY:REVIEWED BY:DRAWING NO.:DRAWN BY:DESIGN BY:CHECKED BY:FILE:PROJECT NO.:DATE:OCTOBER 2021TR0795ADATEREVAPPDESCRIPTIONDRNATRIUM AT BLUE RIDGE2501 BLUE RIDGE ROAD, SUITE 430RALEIGH, NC 27607919.870.0576THIS DRAWING MAY NOT BE ISSUEDFOR PROJECT TENDER ORCONSTRUCTION, UNLESS SEALED.SIGNATUREDATEAS-BUILT CONSTRUCTIONRECORD DRAWINGSFAYETTEVILLE WORKS SITEAS-BUILT CONSTRUCTION RECORD DRAWING SUBMITTAL0 10.29.21JFH CAS
GEOSYNTEC-PW-01\DOCUMENTS\CLIENTS\C\CHEMOURS\TR0795A - CHEMOURS\CADD\05 - INTERIM REMEDIAL DESIGN - SEEP D\DRAWINGS\SHEETS\TR0795-G02
NOTES AND SYMBOLSCMDSJFHJWEJJDCASG-02TR0795-G02.dwgHATCH PATTERN LEGENDABBREVIATIONSDETAIL AND SECTION IDENTIFICATION LEGEND213EXAMPLE: DETAIL NUMBER 2 WHICH ISPRESENTED ON DRAWING NO. 13 WAS FIRSTREFERENCED ON DRAWING NO. 5.AASHTO AMERICAN ASSOCIATION OF STATE HIGHWAY AND TRANSPORTATION OFFICIALSAPP APPROVED BY℄CENTER LINEDRN DRAWN BYDWG DRAWINGEEAST OR EASTINGEL ELEVATIONFT FEETHDPE HIGH DENSITY POLYETHYLENEH:V HORIZONTAL TO VERTICAL LENGTH RATIO FOR A SLOPEHWY HIGHWAYIN INCH INV INVERTMAX MAXIMUMMIN MINIMUMMSL MEAN SEA LEVELNNORTH OR NORTHINGNAD NORTH AMERICAN DATUMNAVD88 NORTH AMERICAN VERTICAL DATUM OF 1988NCDEQ NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITYNO. NUMBERNPDES NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEMN.S.A. NATIONAL STONE ASSOCIATIONNTS NOT TO SCALEOC ON CENTEROZ OUNCEPFAS PER- AND POLYFLUOROALKYL SUBSTANCESPROJ PROJECTRCP REINFORCED CONCRETE PIPERD ROADREV REVISIONSSOUTHSWP STORMWATER PIPETYP TYPICALU.S. UNITED STATESUSEPA UNITED STATES ENVIRONMENTAL PROTECTION AGENCYW WESTW.S. WATER SURFACE% PERCENT OR PERCENTILEEXAMPLE: SECTION LETTER "A" WHICH ISPRESENTED ON DRAWING NO. 9 WAS FIRSTREFERENCED ON DRAWING NO. 5.A5DETAILTITLE OF DETAILSCALE: 1" = 100' (HORIZONTAL); 1" = 20' (VERTICAL)25DETAILTITLE OF DETAILSCALE: 1" = 1'DRAWING ON WHICHABOVE DETAIL WASFIRST REFERENCEDDETAIL NUMBERDETAIL NUMBERDRAWING ON WHICH ABOVEDETAIL IS PRESENTEDSECTION LETTERSTART OF SECTION (0+00)END OF SECTIONDRAWING ON WHICH ABOVESECTION IS PRESENTEDSECTION LETTERDRAWING ON WHICHABOVE SECTION WASFIRST REFERENCEDA9A9CONCRETEGRANULAR ACTIVATED CARBONGRAVELPIPE EMBEDMENT FILLRIPRAPTRENCH BACKFILL/ EARTHEN FILL
TRANSFERBASINFILTER BED 2FILTER BED 1INLETCHAMBEREFFLUENTSTILLING BASINDISCHARGEBASIN47'-8"22'20'5'20'8"8"15'8"8"8"5'8"7'19'-10"12'-6"8"6'-8"8"12'-6"INFLUENTSTILLING BASIN5'BYPASSSPILLWAY FLUME5'6"T1T2DISCHARGE BASIN DRAINTO SEEP CHANNEL8" SCH 80 PVC PIPEINLET CHAMBER WEIR(W1)DOWNWARD OPENINGDISCHARGE WEIR (W3)INLET PIPE MANIFOLD8" SCH 80 PVC PIPEINFLUENT STILLINGBASIN FLOW BAFFLE8" TRANSFER BASINMANIFOLD PIPING8" SCH 80 PVC BUTTERFLY VALVE WITHEXTENSION SPINDLE AND LEVER8" TRANSFER BASINMANIFOLD SCH 80 PVCUNDERDRAIN COLLECTION SYSTEM6" PERFORATED SCH 80 PVC PIPEFILTER BED 1 INLET PIPEWITH BLIND FLANGE4" SCH 80 PVCTRANSDUCERSTILLING WELLTRANSDUCERSTILLING WELL8" BUTTERFLY VALVE WITHEXTENSION SPINDLE AND LEVER4" SCH 80 PVC BUTTERFLY VALVE ANDEXTENSION SPINDLE AND LEVERFILTER BED INLET PIPE4" SCH 80 PVCCONSTRUCTIONJOINTREINFORCEDCONCRETE SLABFOOTER2'FOOTER2'8"29'-6"FILTER BED 2 INLET PIPEWITH BLIND FLANGE4" SCH 80 PVC8"8"8"8"MAINTENANCE PLATFORM3C-043C-04AC-02AC-02BC-02BC-02CC-02CC-02DC-03DC-03EC-03EC-03FC-03FC-03GC-04GC-04HC-04HC-04IC-04IC-046" RISER PIPE SUMP ACCESSDC-03OVERFLOW WEIR (W2)(NOTE 1)CONSTRUCTION DETAILS ICMDSJFHJWEJJDCASC-01TR0795-C01.dwgF1EDC23BA1234567854678FEDCBATHE CHEMOURS COMPANYSEEP D INTERIM REMEDIATION SYSTEMPROJECT:SITE:TITLE:APPROVED BY:REVIEWED BY:DRAWING NO.:DRAWN BY:DESIGN BY:CHECKED BY:FILE:PROJECT NO.:DATE:OCTOBER 2021TR0795ADATEREVAPPDESCRIPTIONDRNATRIUM AT BLUE RIDGE2501 BLUE RIDGE ROAD, SUITE 430RALEIGH, NC 27607919.870.0576THIS DRAWING MAY NOT BE ISSUEDFOR PROJECT TENDER ORCONSTRUCTION, UNLESS SEALED.SIGNATUREDATEAS-BUILT CONSTRUCTIONRECORD DRAWINGSFAYETTEVILLE WORKS SITEAS-BUILT CONSTRUCTION RECORD DRAWING SUBMITTAL0 10.29.21JFHCASGEOSYNTEC-PW-01\DOCUMENTS\CLIENTS\C\CHEMOURS\TR0795A - CHEMOURS\CADD\05 - INTERIM REMEDIAL DESIGN - SEEP D\DRAWINGS\SHEETS\TR0795-C01
024SCALE IN FEETNOTES:1. WEIR 2 (W2) WALL OPENING WAS FILLED WITH REINFORCED CONCRETE.1SCALE: 1" = 2'PLANFLOW THROUGH CELLC-01
3'GRANULARACTIVATED CARBON1'3'TRANSFER BASINMANIFOLD PIPING8" SCH 80 PVC (TYP)FILTER BED INLET PIPE4" SCH 80 PVC (TYP)#5 STONE LAYERGEOCOMPOSITE(NOTE 3)6" PENETRATIONINFLUENT STILLING BASIN7'-6"19'-10"47'-8"8'-2"4'-6"2'-6"2'3'INLET CHAMBEREFFLUENTSTILLING BASININLET CHAMBER WEIR(W1) (NOTE 1)8" THICK REINFORCEDCONCRETE WALL (TYP)DOWNWARD OPENINGDISCHARGE WEIR (W3)(NOTE 1)INFLUENT STILLING BASINFLOW BAFFLEGEOCOMPOSITE(NOTE 3)12'-6"DISCHARGEBASIN24" W X 24" HWEIR OPENING8" TRANSFER BASINMANIFOLD PIPINGSCH 80 PVC4'-8"2'-9"12" PENETRATION3'7'5'#5 STONE LAYER4'-8"8" BUTTERFLY VALVEWITH EXTENSION SPINDLEAND LEVER (TYP)PLATFORM (TYP)FILTER BED 1INLET PIPE MANIFOLD8" SCH 80 PVC PIPEFILTER BED 2INLET PIPE MANIFOLD8" SCH 80 PVC PIPE7'-6"47'-8"8'-2"8" THICK REINFORCEDCONCRETE WALL4'-8"12" PENETRATIONFILTER BED 2FILTER BED 1TRANSFERBASIN2'-10"4'-8"4'-434"3'-114"TRANSFER BASINMANIFOLD PIPING8" SCH 80 PVC (TYP)7'-6"47'-8"8'-2"FILTER BED 2FILTER BED 1TRANSFERBASIN10" PENETRATION (TYP)PLATFORM (TYP)20'5'20'4'-8"4" BUTTERFLY VALVE WITHEXTENSION SPINDLE AND LEVER (TYP)GRANULARACTIVATED CARBONUNDERDRAIN COLLECTION SYSTEM6" PERFORATED SCH 80 PVC PIPE (TYP)FILTER BED INLET PIPE4" SCH 80 PVC (TYP)6" PENETRATION(TYP) (NOTE 2)3'-114"2"2"4C-054C-052'-014"1/4" STEELANCHOR PLATE(TYP)W8X18 STEEL BEAM(TYP)6C-055C-05OVERFLOW WEIR (W2)(NOTE 2)CONSTRUCTION DETAILS IICMDSJFHJWEJJDCASC-02TR0795-C02.dwgF1EDC23BA1234567854678FEDCBATHE CHEMOURS COMPANYSEEP D INTERIM REMEDIATION SYSTEMPROJECT:SITE:TITLE:APPROVED BY:REVIEWED BY:DRAWING NO.:DRAWN BY:DESIGN BY:CHECKED BY:FILE:PROJECT NO.:DATE:OCTOBER 2021TR0795ADATEREVAPPDESCRIPTIONDRNATRIUM AT BLUE RIDGE2501 BLUE RIDGE ROAD, SUITE 430RALEIGH, NC 27607919.870.0576THIS DRAWING MAY NOT BE ISSUEDFOR PROJECT TENDER ORCONSTRUCTION, UNLESS SEALED.SIGNATUREDATEAS-BUILT CONSTRUCTIONRECORD DRAWINGSFAYETTEVILLE WORKS SITEAS-BUILT CONSTRUCTION RECORD DRAWING SUBMITTAL0 10.29.21JFH CAS
GEOSYNTEC-PW-01\DOCUMENTS\CLIENTS\C\CHEMOURS\TR0795A - CHEMOURS\CADD\05 - INTERIM REMEDIAL DESIGN - SEEP D\DRAWINGS\SHEETS\TR0795-C02
024SCALE IN FEETNOTES:1. THE WEIRS WERE PURCHASED FROM GOLDEN HARVEST INC., AS FOLLOWS:THE INLET CHAMBER WEIR (W1) IS A 30.5" X 36" STAINLESSS STEEL WEIR GATE,HANDLE LIFT, MANUFACTURER DRAWING NUMBER MD GH-42.THE DOWNWARD OPENING DISCHARGE WEIR (W3) IS A 24"X24" STAINLESS STEELWEIR GATE, GEAR OPERATED, MANUFACTURER DRAWING NUMBER MD GH-66.2. WEIR 2 (W2) WALL OPENING WAS FILLED WITH REINFORCED CONCRETE.3. THE GEOCOMPOSITE INSTALLED ABOVE THE STONE LAYERS (INLET CHAMBER AND EACHFILTER BED) AND ABOVE THE GAC LAYERS (FILTER BEDS) WAS 200 MIL GEONET FROMAGRU AMERICA, INC. THE GEOTEXTILE (DOUBLE SIDED) WAS APPARENT OPENING SIZE0.180 MM AND 8 OZ/SQUARE YARD MASS PER UNIT AREA.ASCALE: 1" = 2'SECTIONFLOW THROUGH CELL SECTION AC-01BSCALE: 1" = 2'SECTIONFLOW THROUGH CELL SECTION BC-01CSCALE: 1" = 2'SECTIONFLOW THROUGH CELL SECTION CC-01
INFLUENTSTILLING BASINTRANSFERBASINPLATFORM (TYP)12" PENETRATION(TYP)8'-2"BYPASS SPILLWAY FLUME7'-6"2'FOOTER8" THICK REINFORCEDCONCRETE WALLUNDERDRAIN COLLECTION SYSTEM6" PERFORATED SCH 80 PVC PIPE (TYP)22'2'-9"2"15'5'5'1'6'4C-052'8" TRANSFER BASINMANIFOLD PIPINGSCH 80 PVC8" BUTTERFLY VALVE WITHEXTENSION SPINDLE AND LEVER (TYP)8" THICK REINFORCEDCONCRETE WALL4'-8"PLATFORM8'-2"BYPASS SPILLWAY FLUME7'-6"2'FOOTER22'5'2'INFLUENTSTILLING BASIN5'1'5'2'-6"6'16'-4"5" (TYP)10" PENETRATIONUNDERDRAIN COLLECTION SYSTEM6" PERFORATED SCH 80 PVC PIPE (TYP)FILTER BED INLET PIPE4" SCH 80 PVC (TYP)6" PENETRATION2'-10"FLOW BAFFLETRANSFER BASINMANIFOLD PIPING8" SCH 80 PVC (TYP)2'-9"4C-05INFLUENTSTILLING BASIN1'5'6"1'FILTER BED WALLRIPRAPBYPASS SPILLWAY(BY OTHERS)8"6" REINFORCEDCONCRETE SLABCONSTRUCTION JOINTFILL SOIL PLACED IN ACCORDANCEWITH CIVIL DESIGN BY OTHERCONSTRUCTION DETAILS IIICMDSJFHJWEJJDCASC-03TR0795-C03.dwgF1EDC23BA1234567854678FEDCBATHE CHEMOURS COMPANYSEEP D INTERIM REMEDIATION SYSTEMPROJECT:SITE:TITLE:APPROVED BY:REVIEWED BY:DRAWING NO.:DRAWN BY:DESIGN BY:CHECKED BY:FILE:PROJECT NO.:DATE:OCTOBER 2021TR0795ADATEREVAPPDESCRIPTIONDRNATRIUM AT BLUE RIDGE2501 BLUE RIDGE ROAD, SUITE 430RALEIGH, NC 27607919.870.0576THIS DRAWING MAY NOT BE ISSUEDFOR PROJECT TENDER ORCONSTRUCTION, UNLESS SEALED.SIGNATUREDATEAS-BUILT CONSTRUCTIONRECORD DRAWINGSFAYETTEVILLE WORKS SITEAS-BUILT CONSTRUCTION RECORD DRAWING SUBMITTAL0 10.29.21JFH CAS
GEOSYNTEC-PW-01\DOCUMENTS\CLIENTS\C\CHEMOURS\TR0795A - CHEMOURS\CADD\05 - INTERIM REMEDIAL DESIGN - SEEP D\DRAWINGS\SHEETS\TR0795-C03
024SCALE IN FEETDSCALE: 1" = 2'SECTIONFLOW THROUGH CELL SECTION DC-01ESCALE: 1" = 2'SECTIONFLOW THROUGH CELL SECTION EC-01FSCALE: 1" = 2'SECTIONBYPASS SPILLWAY FLOW MEASUREMENT FLUMEC-01
8'-2"7'-6"8" THICK REINFORCEDCONCRETE WALLBYPASS SPILLWAYFLUME5'8"FILTER BED 13'4'-6"2'-6"1'-11"8"CONSTRUCTIONJOINT (TYP)2'CONSTRUCTIONJOINTINLET CHAMBER WEIR(W1) (NOTE 1)8'-2"7'-6"8" THICK REINFORCEDCONCRETE WALLBYPASS SPILLWAYFLUME5'8"8"CONSTRUCTIONJOINT (TYP)2'CONSTRUCTIONJOINTINLET PIPE MANIFOLD8" SCH 80 PVC PIPE8" TRANSFER BASINMANIFOLD PIPINGSCH 80 PVC12" PENETRATION12" PENETRATIONFILTER BED 24'-8"3'-114"OVERFLOW WEIR (W2)(NOTE 2)8'-2"FILTER BED 27'-6"8" THICK REINFORCEDCONCRETE WALLBYPASS SPILLWAYFLUMEDISCHARGEBASIN WEIRDOWNWARD OPENINGDISCHARGE WEIR (W3)(NOTE 1)8"2'3'2'8"CONSTRUCTIONJOINT (TYP)2'CONSTRUCTIONJOINT5'INLET PIPE MANIFOLD8" SCH 80 PVC PIPE12" PENETRATION2'-4"4'-8"1'-8"2'-6"SLAB FLOORFLOWTHROUGHCELL WALLSOLINST 3001 LT F30/M10TRANSDUCER2" PVC PIPETOP OF WALLBOLT AND NUTNON-STRETCHTRANSDUCER CABLEANCHOR BRACKET2'BAROLOGGER 3001OR EQUIVALENT1/2" (MAX)DIAMETER HOLES2" PVC PIPE SECURED TOA FIXED LOCATION ABOVEMAXIMUM WATER LEVEL2" PVC CAP2" PVC CAP WITHDRAIN HOLE1'F1EDC23BA1234567854678FEDCBATHE CHEMOURS COMPANYSEEP D INTERIM REMEDIATION SYSTEMPROJECT:SITE:TITLE:APPROVED BY:REVIEWED BY:DRAWING NO.:DRAWN BY:DESIGN BY:CHECKED BY:FILE:PROJECT NO.:DATE:OCTOBER 2021TR0795ADATEREVAPPDESCRIPTIONDRNATRIUM AT BLUE RIDGE2501 BLUE RIDGE ROAD, SUITE 430RALEIGH, NC 27607919.870.0576THIS DRAWING MAY NOT BE ISSUEDFOR PROJECT TENDER ORCONSTRUCTION, UNLESS SEALED.SIGNATUREDATEAS-BUILT CONSTRUCTIONRECORD DRAWINGSFAYETTEVILLE WORKS SITEAS-BUILT CONSTRUCTION RECORD DRAWING SUBMITTAL0 10.29.21JFH CAS
GEOSYNTEC-PW-01\DOCUMENTS\CLIENTS\C\CHEMOURS\TR0795A - CHEMOURS\CADD\05 - INTERIM REMEDIAL DESIGN - SEEP D\DRAWINGS\SHEETS\TR0795-C04
CONSTRUCTION DETAILS IVCMDSJFHJWEJJDCASC-04TR0795-C04.dwg3SCALE: 1" = 1'DETAILTRANSDUCER STILLING WELLC-01HSCALE: 1" = 2'SECTIONOVERFLOW WEIR (W2)C-01ISCALE: 1" = 2'SECTIONDOWNWARD OPENING DISCHARGE WEIR (W3)C-01GSCALE: 1" = 2'SECTIONINLET CHAMBER WEIR (W1)C-012SCALE: 1" = 6"DETAILBAROMETRIC PRESSURETRANSDUCER ENCLOSUREC-04NOTES:1. THE WEIRS WERE PURCHASED FROM GOLDEN HARVEST INC., AS FOLLOWS:THE INLET CHAMBER WEIR (W1) IS A 30.5" X 36" STAINLESSS STEEL WEIR GATE,HANDLE LIFT, MANUFACTURER DRAWING NUMBER MD GH-42.THE DOWNWARD OPENING DISCHARGE WEIR (W3) IS A 24"X24" STAINLESS STEELWEIR GATE, GEAR OPERATED, MANUFACTURER DRAWING NUMBER MD GH-66.2. WEIR 2 (W2) WALL OPENING WAS FILLED WITH REINFORCED CONCRETE.
TRANSFERBASINFILTER BED 2FILTER BED 1INLETCHAMBEREFFLUENTSTILLING BASINDISCHARGEBASININFLUENTSTILLING BASINBYPASSSPILLWAY FLUMEDISCHARGE BASIN DRAINTO SEEP CHANNEL8" SCH 80 PVC PIPEINLET PIPE MANIFOLD8" SCH 80 PVC PIPE (TYP)INFLUENT STILLINGBASIN FLOW BAFFLE8" TRANSFER BASINMANIFOLD PIPING8" TRANSFER BASINMANIFOLD (TYP)UNDERDRAIN COLLECTION SYSTEM6" PERFORATED SCH 80 PVC PIPE (TYP)FILTER BED 1 INLET PIPE4" SCH 80 PVC (TYP)4" SCH 80 PVC BUTTERFLY VALVE ANDEXTENSION SPINDLE AND LEVER (TYP)FILTER BED INLET PIPE4" SCH 80 PVC (TYP)FILTER BED 2 INLET PIPE4" SCH 80 PVC (TYP)MAINTENANCE PLATFORMBYPASS SPILLWAY8" BUTTERFLY VALVE WITHEXTENSION SPINDLE AND LEVER(TYP)6C-0515'5'7'19'-10"12'-6"5'5'4"3'-2"UPWARD OPENING ACCESS DOOR.2' WIDTH (MAX) (TYP)RECTANGULAR WEIRWITH HAND PULL (TYP)ADJUSTABLE(DOWNWARDOPENING) WEIR WITHGEAR ACTUATORSTEEL ANCHOR PLATE (TYP)W8X18 STEEL BEAM (TYP)5'5'5'3'9"PLATFORM GRATINGTRANSDUCERSTILLING WELL3C-043C-04T1T2TRANSDUCERSTILLING WELL818"8"2"4"2"4116"4116"1/4" STEEL ANCHOR PLATE(2) 7/8" DIA HOLE THRUFOR (2) 3/4" ANCHOR BOLTW8X18 STEEL BEAM4"4"138"514"138"3/16"5C-05W8X18 STEEL BEAMPLATFORM1/4" STEEL ANCHOR PLATE4"6"2"3"8"112"4C-056C-05TOP OF WALLNUTWASHER3/4" DIA CAST-INANCHOR BOLTPLATFORM DETAILSCMDSJFHJWEJJDCASC-05TR0795-C06.dwgF1EDC23BA1234567854678FEDCBATHE CHEMOURS COMPANYSEEP D INTERIM REMEDIATION SYSTEMPROJECT:SITE:TITLE:APPROVED BY:REVIEWED BY:DRAWING NO.:DRAWN BY:DESIGN BY:CHECKED BY:FILE:PROJECT NO.:DATE:OCTOBER 2021TR0795ADATEREVAPPDESCRIPTIONDRNATRIUM AT BLUE RIDGE2501 BLUE RIDGE ROAD, SUITE 430RALEIGH, NC 27607919.870.0576THIS DRAWING MAY NOT BE ISSUEDFOR PROJECT TENDER ORCONSTRUCTION, UNLESS SEALED.SIGNATUREDATEAS-BUILT CONSTRUCTIONRECORD DRAWINGSFAYETTEVILLE WORKS SITEAS-BUILT CONSTRUCTION RECORD DRAWING SUBMITTAL0 10.29.21JFH CAS
GEOSYNTEC-PW-01\DOCUMENTS\CLIENTS\C\CHEMOURS\TR0795A - CHEMOURS\CADD\05 - INTERIM REMEDIAL DESIGN - SEEP D\DRAWINGS\SHEETS\TR0795-C06
063SCALE IN FEET4SCALE: 1" = 2'PLANPLATFORM INSTALLATIONC-026SCALE: 1" = 6"DETAILSTEEL ANCHOR PLATEC-055SCALE: 1" = 6"DETAILANCHOR BOLT DETAILC-05
DISCHARGE BASIN DRAINTO SEEP CHANNEL8" SCH 80 PVC PIPE8" SCH 80 PVC BUTTERFLY VALVE (TYP)UNDERDRAIN COLLECTION SYSTEM6" PERFORATED PVC PIPE (TYP)8" SCH 80 PVCBUTTERFLY VALVE (TYP)4" SCH 80 PVC BUTTERFLY (TYP)DOWNWARD OPENINGDISCHARGE WEIR (W3)OVERFLOW WEIR (W2)(NOTE 1)INLET CHAMBERWEIR (W1)FILTER BED 2(FB2)FILTER BED 1(FB1)INLET CHAMBEREFFLUENTSTILLING BASINDISCHARGEBASINTRANSFERBASININFLUENTSTILLING BASINOPERATIONAL MODEFLOWCONTROLDEVICEFB1 LEAD/FB2LAGFB1 LAG/FB2LEADFB1CHANGEOUT(FB2 OPEN)FB2CHANGEOUT(FB1 OPEN)VALVE V1OPENCLOSEDCLOSEDCLOSEDVALVE V2CLOSEDOPENCLOSEDCLOSEDVALVE V3CLOSEDOPENCLOSEDOPENVALVE V4OPENCLOSEDOPENCLOSEDVALVE V5CLOSEDOPENCLOSEDCLOSEDVALVE V6CLOSEDOPENCLOSEDCLOSEDVALVE V7CLOSEDOPENCLOSEDCLOSEDVALVE V8CLOSEDOPENCLOSEDCLOSEDVALVE V9CLOSEDOPENCLOSEDCLOSEDVALVE V10 CLOSEDOPENCLOSEDCLOSEDVALVE V11OPENCLOSEDCLOSEDCLOSEDVALVE V12OPENCLOSEDCLOSEDCLOSEDVALVE V13OPENCLOSEDCLOSEDCLOSEDVALVE V14OPENCLOSEDCLOSEDCLOSEDVALVE V15OPENCLOSEDCLOSEDCLOSEDVALVE V16OPENCLOSEDCLOSEDCLOSEDVALVE V17OPENCLOSEDCLOSEDOPENVALVE V18 CLOSEDOPENOPENCLOSEDWEIR W1OPENOPENOPENOPENWEIR W2PERMANENTLY CLOSED: CANNOT BE OPENEDWEIR W3OPENOPENOPENOPENV11V12V13V14V15V16V10V9V8V7V6V5V1V2V4V3W1W2W3V18V17INLETCHAMBERFILTER BED 1 (FB1)FILTER BED 2 (FB2)EFFLUENTSTILLINGBASINDISCHARGEBASINWEIR W1WEIR W3PONDEDINLET WATERDISCHARGETO SEEPCHANNELTRANSFER BASIN8" SCH 80 PVC BUTTERFLY VALVE (TYP)UNDERDRAIN COLLECTION SYSTEM6" PERFORATED PVC (TYP)INFLUENT STILLING BASINWEIR W2W1W3V1V4V13V14V15V16V17W24" SCH 80 PVCBUTTERFLY (TYP)8" SCH 80 PVCBUTTERFLY VALVE (TYP)V11V12V2V3V8V7V6V5V18V10V9INLETCHAMBERFILTER BED 1 (FB1)FILTER BED 2 (FB2)EFFLUENTSTILLINGBASINDISCHARGEBASINWEIR W1WEIR W3PONDEDINLET WATERDISCHARGETO SEEPCHANNELTRANSFER BASIN8" SCH 80 PVC BUTTERFLY VALVE (TYP)UNDERDRAIN COLLECTION SYSTEM6" PERFORATED PVC (TYP)INFLUENT STILLING BASINWEIR W2W1W3V1V4V17W24" SCH 80 PVCBUTTERFLY (TYP)8" SCH 80 PVCBUTTERFLY VALVE (TYP)V2V3V18V13V14V15V16V11V12V8V7V6V5V10V96" RISER PUMP SUMP ACCESS (TYP) PROCESS FLOW DIAGRAMCMDSJFHJWEJJDCASD-01TR0795-D01.dwgF1EDC23BA1234567854678FEDCBATHE CHEMOURS COMPANYSEEP D INTERIM REMEDIATION SYSTEMPROJECT:SITE:TITLE:APPROVED BY:REVIEWED BY:DRAWING NO.:DRAWN BY:DESIGN BY:CHECKED BY:FILE:PROJECT NO.:DATE:OCTOBER 2021TR0795ADATEREVAPPDESCRIPTIONDRNATRIUM AT BLUE RIDGE2501 BLUE RIDGE ROAD, SUITE 430RALEIGH, NC 27607919.870.0576THIS DRAWING MAY NOT BE ISSUEDFOR PROJECT TENDER ORCONSTRUCTION, UNLESS SEALED.SIGNATUREDATEAS-BUILT CONSTRUCTIONRECORD DRAWINGSFAYETTEVILLE WORKS SITEAS-BUILT CONSTRUCTION RECORD DRAWING SUBMITTAL0 10.29.21JFH CAS
GEOSYNTEC-PW-01\DOCUMENTS\CLIENTS\C\CHEMOURS\TR0795A - CHEMOURS\CADD\05 - INTERIM REMEDIAL DESIGN - SEEP D\DRAWINGS\SHEETS\TR0795-D01
8TABLEOPERATIONAL MODED-017PLANFLOW THROUGH CELL VALVE SCHEMATICD-019SCHEMATICFLOW THROUGH CELL SYSTEM FLOWWITH FILTER BED 1 IN LEAD POSITIONAND FILTER BED 2 IN LAG POSITIOND-0110SCHEMATICFLOW THROUGH CELL SYSTEM FLOWWITH FILTER BED 2 IN LEAD POSITIONAND FILTER BED 1 IN LAG POSITIOND-01NOTES:1. WEIR 2 (W2) WALL OPENING WAS FILLED WITH REINFORCED CONCRETE.

TR0795A
APPENDIX E
Transducer Data Reduction

Legend−Discharge Basin Elevation−Weir 3 Elevation
Notes:
Figure E1 shows the discharge basin transducer data that was collected during the reporting period.
Raleigh, NC October 2021
Discharge Basin Water Elevation -
Seep D
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
E1
37
37.2
37.4
37.6
37.8
38
38.2
38.4
38.6
38.8
39
8/1/218/3/218/5/218/7/218/9/218/11/218/13/218/15/218/17/218/19/218/21/218/23/218/25/218/27/218/29/218/31/219/2/219/4/219/6/219/8/219/10/219/12/219/14/219/16/219/18/219/20/219/22/219/24/219/26/219/28/219/30/21Elevation (ft msl)
Legend−Discharge Basin Water Elevation Precipitation (daily totals)−River Stage−Weir 3 Elevation
Raleigh, NC October 2021
Discharge Basin Water Elevation and
External Forcings - Seep DNotes:
As water can flow through the flow-through cell both as a result of wet weather inflow and elevated river levels from flooding, Figure E2 compares the available transducer data
to precipitation and river stage elevation data available from the USGS Huske Lock and Dam.
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
E2
29
31
33
35
37
39
41
8/1/218/3/218/5/218/7/218/9/218/11/218/13/218/15/218/17/218/19/218/21/218/23/218/25/218/27/218/29/218/31/219/2/219/4/219/6/219/8/219/10/219/12/219/14/219/16/219/18/219/20/219/22/219/24/219/26/219/28/219/30/21Elevation (ft msl)0
1
2
3
4
5
Precipitation (in)
Legend−Influent Chamber/Impoundment Elevation
Notes:
Figure E3 shows the influent transducer data that was collected during the reporting period.
Raleigh, NC October 2021
Inlet Chamber Water Elevation -
Seep D
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
E3
38
38.5
39
39.5
40
40.5
41
41.5
42
8/1/218/3/218/5/218/7/218/9/218/11/218/13/218/15/218/17/218/19/218/21/218/23/218/25/218/27/218/29/218/31/219/2/219/4/219/6/219/8/219/10/219/12/219/14/219/16/219/18/219/20/219/22/219/24/219/26/219/28/219/30/21Elevation (ft msl)
Legend−Inlet Chamber Water Elevation Precipitation (daily totals)−River Stage
Bypass Spillway Elevation
Raleigh, NC October 2021
Inlet Chamber Water Elevation and
External Forcings - Seep DNotes:
As water can flow through the Bypass Spillway both as a result of wet weather inflow and elevated river levels from flooding, Figure E4 compares the available transducer data
to precipitation and river stage elevation data available from the USGS Huske Lock and Dam.
Chemours Fayetteville Works
Fayetteville, North Carolina
Figure
E4
29
31
33
35
37
39
41
43
8/1/218/3/218/5/218/7/218/9/218/11/218/13/218/15/218/17/218/19/218/21/218/23/218/25/218/27/218/29/218/31/219/2/219/4/219/6/219/8/219/10/219/12/219/14/219/16/219/18/219/20/219/22/219/24/219/26/219/28/219/30/21Elevation (ft msl)0
1
2
3
4
5
Precipitation (in)

TR0795A

APPENDIX F
Laboratory Analytical Data Review Narratives
(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-A-
INFLUENT-
336-081721 320-77803-
1 Other liquid N 08/17/2021 10:00 FS
SEEP-D-
EFFLUENT-
336-
081721-D 320-77803-
10 Other liquid N 08/17/2021 10:00 DUP
SEEP-A-
EFFLUENT-
306-081721 320-77803-
2 Other liquid N 08/17/2021 10:00 FS
SEEP-C-
INFLUENT-
336-081721 320-77803-
3 Other liquid N 08/17/2021 10:00 FS
SEEP-C-
EFFLUENT-
336-081721 320-77803-
4 Other liquid N 08/17/2021 10:00 FS
SEEP-D-
INFLUENT-
306-081721 320-77803-
5 Other liquid N 08/17/2021 10:00 FS
SEEP-D-
EFFLUENT-
336-081721 320-77803-
6 Other liquid N 08/17/2021 10:00 FS
SEEP-B-
INFLUNET-
336-081721 320-77803-
7 Other liquid N 08/17/2021 10:00 FS
SEEP-B-
EFFLUENT-
336-081721 320-77803-
8 Other liquid N 08/17/2021 10:00 FS
SEEP-
FBLK-
081721 320-77803-
9 Blank Water N 08/17/2021 10:00 FB
SEEP-A-
INFLUENT-
24-082021 320-78111-
1 Surface
Water N 08/20/2021 19:00 FS
SEEP-A-
EFFLUENT-
24-082021 320-78111-
2 Surface
Water N 08/20/2021 19:00 FS
SEEP-C-
INFLUENT-
24-082021 320-78111-
3 Surface
Water N 08/20/2021 19:00 FS
SEEP-C-
EFFLUENT-
24-082021 320-78111-
4 Surface
Water N 08/20/2021 19:00 FS
SEEP-D-
INFLUENT-
24-082021 320-78111-
5 Surface
Water N 08/20/2021 19:00 FS
SEEP-D-
EFFLUENT-
24-082021 320-78111-
6 Surface
Water N 08/20/2021 19:00 FS
SEEP-B-
INFLUENT-
24-082021 320-78111-
7 Surface
Water N 08/20/2021 19:00 FS

SEEP-B-
EFFLUENT-
24-082021 320-78111-
8 Surface
Water N 08/20/2021 19:00 FS
SEEP-A-
INFLUENT-
24-082821 320-78428-
1 Other liquid N 08/28/2021 19:00 FS
SEEP-A-
EFFLUENT-
24-082821 320-78428-
2 Other liquid N 08/28/2021 19:00 FS
SEEP-C-
INFLUENT-
24-082821 320-78428-
3 Other liquid N 08/28/2021 19:00 FS
SEEP-C-
EFFLUENT-
24-082821 320-78428-
4 Other liquid N 08/28/2021 19:00 FS
SEEP-D-
INFLUENT-
24-082821 320-78428-
5 Other liquid N 08/28/2021 19:00 FS
SEEP-D-
EFFLUENT-
24-082821 320-78428-
6 Other liquid N 08/28/2021 19:00 FS
SEEP-B-
INFLUENT-
24-082821 320-78428-
7 Other liquid N 08/28/2021 19:00 FS
SEEP-B-
EFFLUENT-
24-082821 320-78428-
8 Other liquid N 08/28/2021 19:00 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-D-
INFLUENT-
336-100121
320-79696-
7 Other liquid N 10/01/2021 12:01 FS

SEEP-D-
EFFLUENT-
330-100121
320-79696-
9 Other liquid N 10/01/2021 06:01 FS

* FS=Field Sample
DUP=Field Duplicate
FB=Field Blank
EB=Equipment Blank
TB=Trip Blank

Analytical Protocol

Lab Name Lab Method Parameter Category Sampling Program
Eurofins 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 ReportAssociated MS and/or MSD analysis had relative percent recovery (RPR) values less than the lower control limit. The actual detection limits may behigher than reported.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Seep Flow Through Cell Sampling 2021AnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsSEEP-D-EFFLUENT-336-08172108/17/2021320-77803-6PFMOAA0.0020ug/LCl. Spec. Table 3Compound SOPUJPFAS_DI_Prep0.0020PQLSEEP-D-EFFLUENT-336-08172108/17/2021320-77803-6PFMOAA0.0020ug/LCl. Spec. Table 3Compound SOPUJPFAS_DI_Prep0.0020PQLPage 1 of 6
Associated LCS and/or LCSD analysis had relative percent recovery (RPR) values higher than the upper control limit. The reported result may bebiased high.LABSTATSValidation Options:Validation ReasonFayettevilleSite:Sampling Program:Seep Flow Through Cell Sampling 2021AnalyticalMethodAnalyteDateSampledPQLValidationQualifierLab Sample IDPre-prepMDLResultTypeField Sample IDPrepUnitsSEEP-D-INFLUENT-306-08172108/17/2021320-77803-5R-PSDA0.73UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-A-INFLUENT-336-08172108/17/2021320-77803-1R-PSDA2.1UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-B-INFLUNET-336-08172108/17/2021320-77803-7R-PSDA4.8UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-C-INFLUENT-336-08172108/17/2021320-77803-3R-PSDA0.88UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLPage 2 of 6
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-prepMDLResultTypeField Sample IDPrepUnitsSEEP-D-INFLUENT-306-08172108/17/2021320-77803-5Hydrolyzed PSDA2.0UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-D-INFLUENT-306-08172108/17/2021320-77803-5R-EVE0.73UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-A-EFFLUENT-24-08202108/20/2021320-78111-2Hydrolyzed PSDA0.0022UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSEEP-A-INFLUENT-24-08202108/20/2021320-78111-1R-PSDA1.7UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-A-INFLUENT-24-08202108/20/2021320-78111-1Hydrolyzed PSDA19UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-A-INFLUENT-24-08202108/20/2021320-78111-1R-EVE0.97UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-B-INFLUENT-24-08202108/20/2021320-78111-7R-PSDA4.0UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-B-INFLUENT-24-08202108/20/2021320-78111-7Hydrolyzed PSDA29UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-B-INFLUENT-24-08202108/20/2021320-78111-7R-EVE3.2UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-C-INFLUENT-24-08202108/20/2021320-78111-3R-PSDA0.58UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-C-INFLUENT-24-08202108/20/2021320-78111-3Hydrolyzed PSDA0.70UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-C-INFLUENT-24-08202108/20/2021320-78111-3R-EVE0.55UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-D-INFLUENT-24-08202108/20/2021320-78111-5R-PSDA0.56UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-D-INFLUENT-24-08202108/20/2021320-78111-5Hydrolyzed PSDA1.3UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-D-INFLUENT-24-08202108/20/2021320-78111-5R-EVE0.58UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-A-EFFLUENT-24-08282108/28/2021320-78428-2R-PSDA0.0075UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLPage 3 of 6
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-prepMDLResultTypeField Sample IDPrepUnitsSEEP-A-EFFLUENT-24-08282108/28/2021320-78428-2Hydrolyzed PSDA0.073UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSEEP-A-EFFLUENT-24-08282108/28/2021320-78428-2R-EVE0.0053UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSEEP-A-INFLUENT-24-08282108/28/2021320-78428-1R-PSDA2.2UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-A-INFLUENT-24-08282108/28/2021320-78428-1Hydrolyzed PSDA23UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-A-INFLUENT-24-08282108/28/2021320-78428-1R-EVE1.0UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-B-INFLUENT-24-08282108/28/2021320-78428-7R-PSDA3.6UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-B-INFLUENT-24-08282108/28/2021320-78428-7Hydrolyzed PSDA23UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-B-INFLUENT-24-08282108/28/2021320-78428-7R-EVE2.2UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-A-EFFLUENT-336-09142109/14/2021320-79069-2Hydrolyzed PSDA0.0063UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSEEP-A-EFFLUENT-336-09142109/14/2021320-79069-2Hydrolyzed PSDA0.0065UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSEEP-A-EFFLUENT-336-091421-D09/14/2021320-79069-7Hydrolyzed PSDA0.0057UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSEEP-A-INFLUENT-336-09142109/14/2021320-79069-1R-PSDA2.3UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-A-INFLUENT-336-09142109/14/2021320-79069-1Hydrolyzed PSDA26UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-A-INFLUENT-336-09142109/14/2021320-79069-1R-EVE1.1UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-C-INFLUENT-24-08282108/28/2021320-78428-3R-PSDA0.79UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-C-INFLUENT-24-08282108/28/2021320-78428-3Hydrolyzed PSDA0.92UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-C-INFLUENT-24-08282108/28/2021320-78428-3R-EVE0.64UG/LCl. Spec. Table 3CompoundJPFAS_DI_Prep0.072PQLPage 4 of 6
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-prepMDLResultTypeField Sample IDPrepUnitsSOPSEEP-C-INFLUENT-336-09142109/14/2021320-79069-3R-PSDA0.63UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-C-INFLUENT-336-09142109/14/2021320-79069-3Hydrolyzed PSDA0.86UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-C-INFLUENT-336-09142109/14/2021320-79069-3R-EVE0.61UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-D-INFLUENT-24-08282108/28/2021320-78428-5R-PSDA0.43UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-D-INFLUENT-24-08282108/28/2021320-78428-5Hydrolyzed PSDA0.98UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-D-INFLUENT-24-08282108/28/2021320-78428-5R-EVE0.32UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-D-INFLUENT-318-09142109/14/2021320-79069-5R-PSDA0.54UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-D-INFLUENT-318-09142109/14/2021320-79069-5Hydrolyzed PSDA1.3UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-D-INFLUENT-318-09142109/14/2021320-79069-5R-EVE0.62UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-D-INFLUENT-336-10012110/01/2021320-79696-7R-PSDA1.2UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.071PQLSEEP-D-INFLUENT-336-10012110/01/2021320-79696-7Hydrolyzed PSDA2.6UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-D-INFLUENT-336-10012110/01/2021320-79696-7R-EVE1.1UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-A-EFFLUENT-306-08172108/17/2021320-77803-2Hydrolyzed PSDA0.0058UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.0020PQLSEEP-A-INFLUENT-336-08172108/17/2021320-77803-1Hydrolyzed PSDA23UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-A-INFLUENT-336-08172108/17/2021320-77803-1R-EVE0.81UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-B-INFLUNET-336-08172108/17/2021320-77803-7Hydrolyzed PSDA32UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLPage 5 of 6
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-prepMDLResultTypeField Sample IDPrepUnitsSEEP-B-INFLUNET-336-08172108/17/2021320-77803-7R-EVE2.8UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLSEEP-C-INFLUENT-336-08172108/17/2021320-77803-3Hydrolyzed PSDA1.2UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.038PQLSEEP-C-INFLUENT-336-08172108/17/2021320-77803-3R-EVE0.80UG/LCl. Spec. Table 3Compound SOPJPFAS_DI_Prep0.072PQLPage 6 of 6