TABLE OF CONTENTS
1INTRODUCTION ....................................................................................................................1

2

SEEP B CONSTRUCTION .....................................................................................................2
2.1 Permits Obtained .............................................................................................................2
2.2 Construction and Startup Sequence .................................................................................2

3

SEEP B 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 ...........................................................................................54

SUMMARY..............................................................................................................................55

REFERENCES .........................................................................................................................6

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LIST OF TABLES
Table 1

Sampling Summary – Seep B (August – September 2021)

Table 2

Performance Monitoring Analytical Results – Seep B (August – September 2021)
LIST OF FIGURES

Figure 1

River Level and FTC As-Built Elevations – Seep B (August – September 2021)

Figure 2

Measured Discharge Flowrate – Seep B (August – September 2021)

Figure 3

Influent Water Elevation and Bypass Flow – Seep B (August – September 2021)

Figure 4

Turbidity Logging and Precipitation – Seep B (August 2021)
LIST OF APPENDICES

Appendix A

Bladen County NCDEQ Stormwater Permit

Appendix B

Civil As-Built Record Drawings

Appendix C

Mechanical As-Built Record Drawings

Appendix D

Transducer Data Reduction

Appendix E

Laboratory Analytical Data Review Narrative

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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 Basinng/Lnanograms 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

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1

INTRODUCTION

Geosyntec Consultants of NC, P.C. (Geosyntec) has prepared this Interim Seep Remediation Seep
B Effectiveness Demonstration Report (“Effectiveness Report”) on behalf of The Chemours
Company FC, LLC (Chemours). This report provides a record of construction completion anddemonstration of interim effectiveness for the flow-through cell (FTC) installed as the interim
remediation system at Seep B 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 shallsubmit a report demonstrating that:i.

the FTC intercepted total base flow (during dry weather flow) at each seep; andii.

removed per- and polyfluoroalkyl substances (PFAS) - as measured by influent andeffluent concentrations of indicator parameters hexafluoropropylene oxide dimer(HFPO-DA), perfluoromethoxypropyl carboxylic acid (PMPA), and perfluoro-2methoxyaceticacid (PFMOAA) - at a minimum removal efficiency of 80% on amonthly average basis (the “Interim Effectiveness Demonstration”) for each of thesecond and third full calendar months of operation.

Substantial completion of construction was achieved at Seep B on June 8, 2021, and startup
commenced thereafter. Therefore, this Effectiveness Report details the performance record ofAugust 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 hydraulicmechanics, flood management practices, data collection methodology and reduction process, andflow calculation formulas. As a simplifying step for presentation clarity, at various sections in thisEffectiveness Report, reference is made to these details in O&M Report #1. For an overview ofthe hydraulic functionality of the system, see Section 1.1 of O&M Report #1.

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2

SEEP B CONSTRUCTION

This section describes the regulatory permits that were obtained for the Seep B FTC, and theconstruction 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 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 was included in the Seep D Effectiveness Reportsubmitted on October 21, 2021.

•

January 14, 2021: Stormwater discharge (i.e., land disturbance) permit from BladenCounty, North Carolina Department of Environmental Quality (NCDEQ), project ID
BLADE-2021-008 (for Seep B), provided herein as Appendix A.

2.2

Construction and Startup Sequence

Construction initiated with access road and laydown area clearing and grading on December 2,
2020. In-stream construction began on March 12, 2021.
The in-stream earthwork was completed on March 22, with sheet pile installation beginning
immediately after. As shown in the civil as-built record drawings (Appendix B), two rows of sheet
pile were installed (the upgradient and downgradient faces the FTC). Concrete formwork began
on April 12, with the slab and walls poured on May 4. Mechanical work (piping and valving) began
on May 12. The mechanical as-built record drawings are provided in Appendix C. Hydrostatic
testing to evaluate the water tightness of each FTC chamber was performed May 26. The FTC was
put into service on June 8. The elevation of the Cape Fear River relative to key elevation of the
FTC for the August – September reporting period is shown in Figure 1.
Some construction elements continued after substantial completion allowed for startup of thesystem, namely:•

Regrading of seep channel; and•Installation of riprap; and•Surface restoration.

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3

SEEP B PERFORMANCE EVALUATION

The following sections describe the evaluation of base flow capture and PFAS removal efficiency,
per the requirements of Paragraph 2(a)(vi).
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
D.
Figure 2 shows the measurable discharge flowrates through the FTC over the reporting period.
Effluent transducer data was inadvertently overwritten during retrieval on the August 30 O&M
field event. Data was lost for August 27 through 30, 2021 and flowrates were imputed for theeffluent data gap duration. The imputed flowrates were calculated as the median of measured
flowrates three days before and after the data gap.
The median of the measured flowrate through the FTC during the reporting period was 79 gallons
per minute (gpm), as compared to the pre-design median value of 149 gpm (from flumes prior toconstruction). The calculated 95th percentile value of treated flow over the reporting period was
184 gpm, as compared to the 95th percentile value of pre-design dry weather base flow (the designbasis treatment flow) of 226 gpm. The lower values of the calculated flows, as compared to thedesign basis flows, is attributed to low rainfall during a hot summer reporting period of highevapotranspiration rates. 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).
As noted in the next subsection, there was very limited bypass in the reporting period, primarily
one instance in early August after a 1.1-inch rainstorm. Hence, although the calculated statisticalvalues for this Seep B reporting period are less than the pre-design set, they are the result of nearlycomplete capture of both dry and wet weather flow. It is also noted that since startup, the 95%
percentile value of treated flow is 244 gpm, which is higher than the 95th percentile value of predesign dry weather base flow, and based on these results, the system is capable of treating morethan the design basis under favorable hydraulic conditions.
Using the measured flowrate calculations, approximately 8,000,000 gallons of water was treatedby 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
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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 inAppendix E. Influent transducer data was inadvertently overwritten during retrieval on the August
30 O&M field event. Influent data was lost for August 27 through 30, 2021.
The resulting figure for influent water level elevation, and occurrences of bypass flow, is provided
in Figure 3. As shown, bypass flow was only observed in August, primarily due to a 1.1-inch rain
event around August 6. The other rain events were captured by the system, including a 0.6-inchrain event around September 8, and a 1.6-inch rain event around September 21.
Overall, three separate rain events with at least 0.5 inches of rainfall occurred in August and
September. Figure 4 presents the relationship observed between precipitation and turbidity.
Maintenance events were conducted following each rain event to either return the system to acondition of no bypass or maintain the condition of no bypass. A total of nine GAC maintenanceevents 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, andanalytical results, and the overall efficiency of PFAS removal by the FTC.
3.2.1

Performance Monitoring Sampling

Six 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 andincluded 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 six composite performance monitoring samples are provided in Table 2
and described below.
Total Table 3+ PFAS compounds (17 compounds) in the influent ranged from 200,000 to 440,000
nanograms per liter (ng/L). The average and median total Table 3+ (17 compounds) concentrations
were approximately 280,000 and 220,000 ng/L, respectively. Within each influent sample, theconstituents of highest concentration were PFMOAA, PMPA, and HFPO-DA.
Total Table 3+ PFAS compounds (17 compounds) in the effluent ranged from non-detect in all
samples, to 502 ng/L, representing a minimum removal efficiency of 99.88% in the six composite
samples.

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3.2.3

System Effectiveness

System effectiveness, defined by the percentage removal of the combined concentrations of thethree 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 so that if either the influent and effluent
autosamplers have different compositing durations or that the two composite sampling periods inthe 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 arepresentative assessment of mass present in both the influent and effluent over time; samples
corresponding to greater flow volumes will have a proportionately higher weight. Systemeffectiveness 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 system effectiveness wascalculated to be >99.99% in August and 99.91% in September. 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.

4

SUMMARY

The following summarizes the evaluation of Seep B FTC’s effectiveness at capturing total
baseflow and removing PFAS for the second and third full calendar months of operation (Augustand September 2021).
•

Flow data from the FTC demonstrates the system can treat more than the design basis flowrate under favorable hydraulic conditions (i.e., the 95th percentile of measured flow since
startup was 244 gpm as compared to the pre-construction estimated 95th percentile of dry
weather flow value of 226 gpm). FTC process flow rates can be affected by sedimentaccumulating within the filter beds and river levels increasing above the discharge pipe,
both of which affect the dynamic head losses through the system. Nonetheless, the system
has demonstrated the ability to process total base flow and will likely continue to treat atleast a portion of wet weather flow during future operation.

•

Performance monitoring results from the composite samples indicate the removal
efficiency, based on the Total Table 3+ 17 Compounds, was at least 99.88% and on average
was 99.97%. The System Effectiveness flow-weighted calculation yielded a similar result(>99.99% in August and 99.91% in September). The system prevented an estimated 23.27
lbs of PFAS from being discharged to the Cape Fear River during the reporting period.

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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.
Geosyntec, 2021. Interim Seep Remediation Seep D Effectiveness Demonstration Report.
Chemours Fayetteville Works. 21 October 2021.

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TABLES

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Table 1
Sampling Summary - Seep B(August - September 2021)
Chemours Fayetteville Works
Fayetteville, North Carolina
Performance Monitoring Composite Samples
Sample ID
SEEP-B-INFLUENT-336-081721
SEEP-B-EFFLUENT-336-081721
SEEP-B-INFLUENT-24-082021
SEEP-B-EFFLUENT-24-082021
SEEP-B-INFLUENT-24-082821
SEEP-B-EFFLUENT-24-082821
SEEP-B-INFLUENT-210-090921
SEEP-B-EFFLUENT-210-090921
SEEP-B-INFLUENT-330-092321
SEEP-B-EFFLUENT-330-092321
SEEP-B-INFLUENT-168-100121
SEEP-B-EFFLUENT-168-100121

Composite Period

Sample Date

August 3 - August 17, 2021

August 17, 2021

August 19 - August 20, 2021

August 20, 2021

August 27 - August 28, 2021

August 28, 2021

September 1 - September 9, 2021

September 9, 2021

September 9 - September 23, 2021

September 23, 2021

September 24 - October 1, 2021

October 1, 2021

Wet Weather Composite Sample
Sample ID
SEEP-B-INFLUENT-RAIN-24-081821
SEEP-B-EFFLUENT-RAIN-24-081821
SEEP-B-INFLUENT-RAIN-24-092221
SEEP-B-EFFLUENT-RAIN-24-092221

Sample Date

Sample Time

Cumulative Rainfall(inches)

August 18, 2021

19:00

0.43

September 22, 2021

10:05

1.69

Notes
1 The Seep A autosamplers malfunctioned from August 17-19, interrupting the collection of aliquots early in the 14-day composite cycle. O&M staff reprogrammed the Seep B samplers to be consistent with Seep A and collect two, 24-hour composites on August 20 and 28 to complete the monthly
sampling program.
2 A GAC changeout was completed on September 9, 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.
3 Sample Identification Label Key: "Seep - [A, B, C, or D] - [Sample Location Inside FTC] - [# of Aliquots in Composite Sample] - [MMDDYY]"
4 Precipitation data obtained from the USGS gauge #02105500 at the William O. Huske Lock and Dam

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Table 2
Summary of Performance Monitoring Analytical Results - Seep B(August - September 2021)
Chemours Fayetteville Works
Fayetteville, NC

SEEP-B-INFLUENT- SEEP-B-EFFLUENT336-081721
336-081721
Sample Date:
Sample Date:
17-Aug-21
17-Aug-21
Table 3 + SOP (ng/ L)

Hfpo Dimer Acid
PFMOAAPFO2HxAPFO3OAPFO4DAPFO5DAPMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCANVHOS, Acid Form
EVE AcidHydro-EVE Acid
R-EVE
PES
PFECA BPFECA-GTotal Table 3+ (17 compounds)1,2
Total Table 3+ (20 compounds)

1

34,00071,00024,000
6,300
1,400
340
42,00018,0002,800
1,100
4,800 J
32,000
68
2,400
3400
2,200
2,800
<6.7
<27
<48
210,000

<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<10
<20
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
ND

250,000

ND

Percent Removal

SEEP-B-INFLUENT- SEEP-B-EFFLUENT24-082021
24-082021
Sample Date:
Sample Date:
20-Aug-21
20-Aug-21

100.0%

41,00079,00026,000
6,500
2,200
660
49,00020,0003,100
1,500
4,000 J
29,000 J
91
2,600
3700
3,000
3,200 J
<6.7
<27
<48
240,000

<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<10
<20
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
ND

100.0%

270,000

ND

100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%

Percent Removal

SEEP-B-INFLUENT- SEEP-B-EFFLUENT24-082821
24-082821
Sample Date:
Sample Date:
28-Aug-21
28-Aug-21

Percent Removal

100.0%

32,00070,00028,000
7,200
1,500
300
32,00017,0001,300
1,000
3,600 J
23,000 J
63
2,100
860
2,000
2,200 J
<6.7
<27
<48
200,000

<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<10
<20
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
ND

100.0%

100.0%

220,000

ND

100.0%

100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%

100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
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 REVE.
Bold - Analyte detected above associated reporting limit.
J - Analyte detected. Reported value may not be accurate or precise.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure< - Analyte not detected above associated reporting limit.
ND - No Table 3+ compounds were detected above their associated reporting limits.
Sample Identification Label Key: "Seep - [A, B, C, or D] - [Sample Location Inside FTC] [# of Aliquots in Composite Sample] - [MMDDYY]"

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Table 2
Summary of Performance Monitoring Analytical Results - Seep B(August - September 2021)
Chemours Fayetteville Works
Fayetteville, NC

SEEP-B-INFLUENT- SEEP-B-EFFLUENT210-090921
210-090921
Sample Date:
Sample Date:
09-Sept-21
09-Sept-21
Table 3 + SOP (ng/ L)

Hfpo Dimer Acid
PFMOAAPFO2HxAPFO3OAPFO4DAPFO5DAPMPA
PEPA
PS Acid
Hydro-PS Acid
R-PSDA
Hydrolyzed PSDA
R-PSDCANVHOS, Acid Form
EVE AcidHydro-EVE Acid
R-EVE
PES
PFECA BPFECA-GTotal Table 3+ (17 compounds)1,2
Total Table 3+ (20 compounds)

1

21,00092,00034,000
8,600
1,400
150
25,000
9,900
560
620
3,900 J
32,000 J
40
1,900
340
1,300
1,900 J
<6.7
<27
<48
200,000

2.6
2.3
<2.0
<2.0
<2.0
<2.0
<10
<20
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
4.9

230,000

4.9

Percent Removal

SEEP-B-INFLUENT- SEEP-B-EFFLUENT330-092321
330-092321
Sample Date:
Sample Date:
23-Sept-21
23-Sept-21

Percent Removal

30
260
39
5.3
<2.0
<2.0
130
35
<2.0
<2.0
4.3 J
23 J
<2.0
2.7
<2.0
<2.0
3.7 J
<2.0
<2.0
<2.0
500

99.9%
99.9%
99.9%
> 99.9%100.0%
100.0%
99.8%
99.9%
100.0%
100.0%
99.9%
99.9%
100.0%
99.9%
100.0%
100.0%
99.9%
100.0%
100.0%
100.0%> 99.9%50,000180,000
68,00016,0002,700
340
52,00024,0001,800
1,500
5,100 J
42,000 J
86
3,900
1500
3,000
3,100 J
<6.7
<27
<48
400,000> 99.9%460,000530> 99.9%> 99.9%100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%SEEP-B-INFLUENT- SEEP-B-EFFLUENT168-100121
168-100121
Sample Date:
Sample Date:
01-Oct-21
01-Oct-21

Percent Removal

17
100
14
2
<2.0
<2.0
61
<20
<2.0
<2.0
<2.0
6.2 J
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
190

> 99.9%99.9%> 99.9%> 99.9%100.0%
100.0%
99.9%
100.0%
100.0%
100.0%
100.0%> 99.9%100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%

99.9%

66,000170,000
66,00016,0002,900
48071,00034,0002,200
1,900
7,100 J
54,000 J
110
4,500
1900
3,800
4,400 J
<6.7
<27
<48
440,000

99.9%

510,000

200

100.0%

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 REVE.
Bold - Analyte detected above associated reporting limit.
J - Analyte detected. Reported value may not be accurate or precise.
ng/L - nanograms per liter
QA/QC - Quality assurance/ quality control
SOP - standard operating procedure< - Analyte not detected above associated reporting limit.
ND - No Table 3+ compounds were detected above their associated reporting limits.
Sample Identification Label Key: "Seep - [A, B, C, or D] - [Sample Location Inside FTC] [# of Aliquots in Composite Sample] - [MMDDYY]"

TR0795A

Page 2 of 2

November 2021

FIGURES

TR0795A

River Elevation During Seep B Flow Through Cell Operation (8/01/2021 through 09/30/2021)

Elevation, feet above sea level, NAVD88

55

50

45
Top of Wall
Spillway40

Top of GAC

35Discharge Invert

30

25
01-AugLegend16-Aug31-Aug15-Sep30-SepRiver

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

River Level & FTC As-Built Elevations - Seep
B
Chemours Fayetteville Works
Fayetteville, North Carolina

FigureRaleigh, NC

November 2021

1

500
450
400

Flowrate (gpm)

350
300
250
200
150
100
50

−
--

Legend

9/30/21

9/26/21

9/22/21

9/18/21

9/14/21

9/10/21

9/6/21

9/2/21

8/29/21

8/25/21

8/21/21

8/17/21

8/13/21

8/9/21

8/5/21

8/1/210

Flowrate Statistics (gpm)
Measured Discharge Flowrate
Imputed Discharge Flowrate

Transducer Data Gap

Medianth
95 percentileMax(08/01 09/30)

79
184
535

Since Startup

98
244
1,153

Notes:
gpm - gallons per minute
Figure 2 depicts the measured discharge flowrate (solid green) of water processed through the filter beds calculated using the Effluent Stilling Basin transducer data. Transducer datafrom August 27, 16:34 through August 30, 15:08 was not retrieved. 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 as the median of measured flowrates from 3 days before and after the data gap. Section 3
describes the gaps in transducer data record.

Measured Discharge Flowrate(August - September 2021) - Seep B
Chemours Fayetteville Works
Fayetteville, North Carolina

FigureRaleigh, NC

November 2021

2

43
42.5
42

Elevation (ft msl)

41.5
41
40.5
40
39.5

9/30/21

9/26/21

9/22/21

9/18/21

9/14/21

9/10/21

9/6/21

9/2/21

8/29/21

8/25/21

8/21/21

8/17/21

8/13/21

8/9/21

8/5/21

8/1/21

39

Precipitation (in)

2
1.5
1
0.5
0

−−

Legend

Influent Chamber/Impoundment Water Elevation
Impoundment Water Elevation Above Bypass Spillway
Bypass Spillway Elevation

Precipitation (daily totals)
Transducer Data Gap

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.
Transducer data from August 27, 16:34 to August 30, 15:08 were not retrieved. Section 3 describes the gaps in transducer data record.

Influent Water Elevation and Bypass
Flow (Aug - Sept 2021) - Seep B
Chemours Fayetteville Works
Fayetteville, North Carolina

FigureRaleigh, NC

November 2021

3

1,000900

Turbidity (NTU)

800
700
600
500
400
300
200
100

Precipitation (in)−Legend

8/9/21

8/7/21

8/5/21

8/3/21

8/1/21

0

2
1.5
1
0.5
0

Turbidity
Precipitation (daily totals)

Notes
NTU - Nephelometric Turbidity Unit
Turbidity data logged with a AquaTROLL Turbidiy Sensor placed in the Influent Stilling Basin.
The peak values recorded by the turbidity sensor (over 1,000 NTU) may be biased high, as the sensors can become clogged during high sediment-loading events. The interpretationof the turbidity data in the report is largely derived on the timing of the readings (i.e., baseline dry weather turbidity is very low and spikes after rain events). For clarity, the y-axis
above is limited to 1,000 NTU.

Seep B Turbidity Logging andPrecipitation (August 2021)
Chemours Fayetteville Works
Fayetteville, North Carolina

FigureRaleigh, NC

November 2021

4

APPENDIX A
Bladen County NCDEQ Stormwater Permit

TR0795A

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. NCG01-2021-0166
Certificate of Coverage No. NCC210166
STORMWATER DISCHARGESNATIONAL 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:
Chemours Seep B Remediation System
22828 NC-87
Hollow
Bladen Countyin 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-2021-008

This Certificate of Coverage shall become effective 1/12/2021.
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 theannual administration and compliance fee.

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

APPENDIX B
Civil As-Built Record Drawings

TR0795A

CAPE

COVER SHEET

Chemours Interim Seep B Remediation Project

Fayetteville, North Carolina
Seep B Interim Remediation System
As-Built
November 9, 2020

FEAR
RIVER

FLOWLINE OF
SEEP B

RIPRAP ARMOREDSLOPE (TYP.)NORTH EMBANKMENT CREST
EL 42.10

35

40

WETLANDS

3H:1V

40

35

OUTLET PIPE TO SEEP FLOWLINE
WITH RIPRAP APRONFILTER BOX T.B.D.
(BY OTHERS)INLET WEIR
EL 39.35

37

RIPRAP ARMOREDSLOPE (TYP.)

40

3H:1V

40

SHEET
PILE

43

44

48

45

45

MAINTENANCE PLATFORM
EL 42.34

45

ROADSIDE SWALE (TYP.)
Q10 = 2.65 CFS
V10 = 2.22 FPS

5%

46

49

ROADSIDE SWALE (TYP.)
Q 10= 1.70 CFS
V 10 = 2.02 FPS

20.0

EQUIPMENT AND
MATERIAL STAGING AREA

47

48

Fayetteville, North Carolina

The Chemours Company

51

50

49

EXISTING
CLEARED AREA

REVIEWED BY:

DRAWN BY:

DKK

NSS

APPROVED BY:

DESIGNED BY:

DAH

TJD
SCALE:CAPE

AS SHOWNNSS

As-Built

DRAWING:

G-1
PROJECT NUMBER:

43-20631B

6

5

4

3

2

8/30/2021

Description
No.

Date

Revisions

X

By:

RIVER

November 9, 2020

1

FEAR

DATE:

FLOWLINE OF
SEEP B

RIPRAP ARMOREDSLOPE (TYP.)

OUTLET PIPE TO SEEP FLOWLINE
WITH RIPRAP APRON

40

1V
3H:

CIVIL SITE PLAN

FILTER BOX T.B.D.
(BY OTHERS)

37
40

SHEET
PILE

ð

ð

43

ð

ð
ð

ð

ROADSIDE SWALE (TYP.)
Q10 = 2.65 CFS
V10 = 2.22 FPS

ð

ð

45

45

ð

ð

5%

48

45

MAINTENANCE PLATFORM
EL 42.34

ð

44

Fayetteville, North Carolina

40

35

35

40

1V
3H:

INLET WEIR
EL 39.35

RIPRAP ARMOREDSLOPE (TYP.)

Chemours Interim Seep B Remediation Project

NORTH EMBANKMENT CREST
EL 42.10

ð

49

20.0
ð

ð

EQUIPMENT AND
MATERIAL STAGING AREAðð

REVIEWED BY:

DRAWN BY:

47

DKK

NSS

APPROVED BY:

DESIGNED BY:

DAH

TJD
ð

ð

SCALE:

48

AS SHOWN

ð

DATE:

By:

NSS

November 9, 2020

ð

51

50
As-Built

DRAWING:

C-1
N
PROJECT NUMBER:

43-20631B

6

5

4

3

8/30/2021
2

No.

1

Date

Description

49

EXISTING
CLEARED AREA

Revisions

ROADSIDE SWALE (TYP.)
Q10 = 1.70 CFS
V10 = 2.02 FPS

ð

46

ð

WETLANDSDRAWING:

C-2

N
PROJECT NUMBER:

43-20631B

6

TJD

5

DESIGNED BY:

4

NSS

3

NSS

By:

ð

DRAWN BY:

2

As-Built

Description

48

8/30/2021

Date

ð

ð

47

1

No.

51

50

49

Revisions

ð

ð

ð

ð

ð

ð

49

ð

ð

ð

ð

ð

ð

ð

45
ð

ð

45

45

ð

ð

ACCESS PLAN

40

35

40

Fayetteville, North Carolina

Chemours Interim Seep B Remediation Project

ð

40

48

37
44

ð

40

35
43

46

REVIEWED BY:DKKAPPROVED BY:DAHSCALE:AS SHOWN

DATE:

November 9, 2020

DRAWING:

C-3

PROJECT NUMBER:

43-20631B

6

5

NSS

By:

TJD

4

As-Built

Description

NSS

3

8/30/2021

Date

DESIGNED BY:

2

1

No.

RevisionsDRAWN BY:
REVIEWED BY:DKKAPPROVED BY:DAHSCALE:AS SHOWN

DATE:

November 9, 2020

Fayetteville, North Carolina

Chemours Interim Seep B Remediation Project

CROSS -SECTIONSTJDDRAWING:

C-4

PROJECT NUMBER:

43-20631B

6

DESIGNED BY:

5

NSS

By:

NSS

4

As-Built

Description

Fayetteville, North Carolina

Chemours Interim Seep B Remediation ProjectN3

8/30/2021

Date

DRAWN BY:

2

1

No.

40

SHEET PILE PLAN AND PROFILE

40

Revisions

37
ð

35

40

35
43

REVIEWED BY:DKKAPPROVED BY:DAHSCALE:AS SHOWN

DATE:

November 9, 2020

40

DRAWING:

C-5

PROJECT NUMBER:

43-20631B

6

5

NSS

By:

TJD

4

As-Built

Description

NSS

3

8/30/2021

Date

DESIGNED BY:

2

1

No.

RevisionsDRAWN BY:
REVIEWED BY:DKKAPPROVED BY:DAHSCALE:AS SHOWN

DATE:

November 9, 2020

Fayetteville, North Carolina

Chemours Interim Seep B Remediation Project

IMPOUNDMENT SECTIONS

1" PLATE

LINK-SEALMODULAR SEALSEALINGCOMPOUNDØ 12" PIPESLEEVE

1" PLATESEALINGCOMPOUNDØ 10" PIPESLEEVE

Ø 6" PIPE

Fayetteville, North Carolina

Typical Details

Chemours Interim Seep B Remediation ProjectØ 8" PIPEREVIEWED BY:

DRAWN BY:

DKK

NSS

APPROVED BY:

DESIGNED BY:

DAH

TJD
SCALE:AS SHOWN
DATE:

NSS

As-Built

DRAWING:

D-1
PROJECT NUMBER:

43-20631B

6

5

4

3

2

8/30/2021
1

No.

Date

Description

By:

November 9, 2020

Revisions

LINK-SEALMODULAR SEAL

6.0'

Typical Details

EXISTING
NATIVE EARTH

Fayetteville, North Carolina

1*

REVIEWED BY:

DRAWN BY:

DKK

NSS

APPROVED BY:

DESIGNED BY:

DAH

TJD
SCALE:AS SHOWN
DATE:

NSS

As-Built

DRAWING:

D-2
PROJECT NUMBER:

43-20631B

6

5

2

8/30/2021
1

Date

Description

By:

November 9, 2020

No.

*USE 12" Ø CULVERT VALUES IN TABLE FOR 8" Ø PIPE DOWNSTREAM OF FILTER
BED (TYP) TO CONSTRUCT OUTLET PROTECTION.

Revisions3

Chemours Interim Seep B Remediation Project

24

12"

6" MIN. SIZERIPRAP

K

4

HIC
"T

3

3'

APPENDIX C
Mechanical As-Built Record Drawings

TR0795A

1

3

2

5

4

6

7

8

THE CHEMOURS COMPANYFAYETTEVILLE WORKS PROJECTSEEP B REMEDIATION SYSTEMMECHANICAL RECORD DRAWINGSAAWILLIS CREEK AND CAPE FEAR RIVER CORRIDORFAYETTEVILLE, BLADEN AND CUMBERLAND COUNTIESSTATE OF NORTH CAROLINANOVEMBER 2021

B

B

N

N

LIST OF DRAWINGSCSITEDRAWING NO.

DRAWING TITLE

G-01

COVER SHEET

G-02

NOTES AND SYMBOLS

C-01

CONSTRUCTION DETAILS I

C-02

CONSTRUCTION DETAILS II

C-03

CONSTRUCTION DETAILS III

C-04

CONSTRUCTION DETAILS IV

C-05

PLATFORM DETAILS

D-01

PROCESS FLOW DIAGRAMCSEEP BD

D© 2020 Microsoft Corporation © 2020 Maxar ©CNES (2020) Distribution Airbus DS

GEOSYNTEC-PW-01\DOCUMENTS\CLIENTS\C\CHEMOURS\TR0795A - CHEMOURS\CADD\03 - INTERIM REMEDIAL DESIGN - SEEP B\DRAWINGS\SHEETS\TR0795-G01

SOURCE: U.S. BUREAU OF THE CENSUS

SOURCE: MICROSOFT CORPORATION BING MAPS 2017

VICINITY MAP

LOCATION MAP

SCALE: 1" = 30 MILESSCALE: 1" = 3,000'

0

3,000

SCALE IN FEET

PREPARED FOR:
22828 NC-87
FAYETTEVILLE, NC 28306
910.483.4681

E

E

0

11.04.21

AS-BUILT CONSTRUCTION RECORD DRAWING SUBMITTAL

JFH

CAS

REV

DATE

DESCRIPTION

DRN

APP

ATRIUM AT BLUE RIDGE
2501 BLUE RIDGE ROAD, SUITE 430
RALEIGH, NC 27607
919.870.0576

TITLE:

PREPARED BY:

COVER SHEETPROJECT:ATRIUM AT BLUE RIDGE
2501 BLUE RIDGE ROAD, SUITE 430
RALEIGH, NC 27607
919.870.0576

F

SITE:

FAYETTEVILLE WORKS SITE
THIS DRAWING MAY NOT BE ISSUED
FOR PROJECT TENDER ORCONSTRUCTION, UNLESS SEALED.

AS-BUILT CONSTRUCTION
RECORD DRAWINGS
1

2

3

4

THE CHEMOURS COMPANYSEEP B INTERIM REMEDIATION SYSTEM

5

6

SIGNATURE

DATE

7

F

DESIGN BY:

CMDS

DATE:

NOVEMBER 2021

DRAWN BY:

JFH

PROJECT NO.:

TR0795ACHECKED BY:

JWE

FILE:

TR0795-G01.dwg

REVIEWED BY:

JJD

DRAWING NO.:

APPROVED BY:

CAS

G-01
8

1

2

3

5

4

6

7

HATCH PATTERN LEGENDA

8

ABBREVIATIONSCONCRETEGRANULAR ACTIVATED CARBONGRAVELPIPE EMBEDMENT FILLRIPRAP

TRENCH BACKFILL/ EARTHEN FILLB

C

DETAIL AND SECTION IDENTIFICATION LEGENDDETAIL NUMBER
2AAASHTOAMERICAN ASSOCIATION OF STATE HIGHWAY AND TRANSPORTATION OFFICIALSAPP

APPROVED BY℄

CENTER LINEDRN

DRAWN BYDWG

DRAWINGE

EAST OR EASTINGEL

ELEVATION

FT

FEET

HDPE

HIGH DENSITY POLYETHYLENE

H:V

HORIZONTAL TO VERTICAL LENGTH RATIO FOR A SLOPE

HWY

HIGHWAY

IN

INCH

INV

INVERTMAX

MAXIMUM

MIN

MINIMUM

MSL

MEAN SEA LEVELNNORTH OR NORTHINGNADNORTH AMERICAN DATUM

NAVD88NORTH AMERICAN VERTICAL DATUM OF 1988

NCDEQ

NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITYNO.

NUMBERNPDES

NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM

N.S.A.

NATIONAL STONE ASSOCIATIONNTSNOT TO SCALEOCON CENTER

OZ

OUNCE

PFAS

PER- AND POLYFLUOROALKYL SUBSTANCESPROJPROJECT

RCP

REINFORCED CONCRETE PIPE

RD

ROAD

REV

REVISION

S

SOUTH

SWP

STORMWATER PIPE

TYP

TYPICAL

U.S.

UNITED STATESUSEPAUNITED STATES ENVIRONMENTAL PROTECTION AGENCY

W

WEST

W.S.

WATER SURFACE%PERCENT OR PERCENTILE

B

C

13
DRAWING ON WHICH ABOVEDETAIL IS PRESENTEDDETAIL NUMBER

2
DRAWING ON WHICHABOVE DETAIL WASFIRST REFERENCED

DETAILTITLE OF DETAIL

5SCALE: 1" = 1'

D
EXAMPLE: DETAIL NUMBER 2 WHICH IS
PRESENTED ON DRAWING NO. 13 WAS FIRSTREFERENCED ON DRAWING NO. 5.
SECTION LETTERSTART OF SECTION (0+00)

A
9

DRAWING ON WHICH ABOVESECTION IS PRESENTEDGEOSYNTEC-PW-01\DOCUMENTS\CLIENTS\C\CHEMOURS\TR0795A - CHEMOURS\CADD\03 - INTERIM REMEDIAL DESIGN - SEEP B\DRAWINGS\SHEETS\TR0795-G02

SECTION LETTERADRAWING ON WHICHABOVE SECTION WASFIRST REFERENCED

END OF SECTIONA
95DETAILTITLE OF DETAILDSCALE: 1" = 100' (HORIZONTAL); 1" = 20' (VERTICAL)

EXAMPLE: SECTION LETTER "A" WHICH IS
PRESENTED ON DRAWING NO. 9 WAS FIRSTREFERENCED ON DRAWING NO. 5.

E

E

0

11.04.21

AS-BUILT CONSTRUCTION RECORD DRAWING SUBMITTAL

JFH

CAS

REV

DATE

DESCRIPTION

DRN

APP

ATRIUM AT BLUE RIDGE
2501 BLUE RIDGE ROAD, SUITE 430
RALEIGH, NC 27607
919.870.0576

TITLE:NOTES AND SYMBOLSPROJECT:THE CHEMOURS COMPANYSEEP B INTERIM REMEDIATION SYSTEMSITE:FAYETTEVILLE WORKS SITEF
THIS DRAWING MAY NOT BE ISSUED
FOR PROJECT TENDER ORCONSTRUCTION, UNLESS SEALED.

AS-BUILT CONSTRUCTION
RECORD DRAWINGS
1

2

3

4

5

6

SIGNATURE

DATE

7

F

DESIGN BY:

CMDS

DATE:

NOVEMBER 2021

DRAWN BY:

JFH

PROJECT NO.:

TR0795ACHECKED BY:

JWE

FILE:

TR0795-G02.dwg

REVIEWED BY:

JJD

DRAWING NO.:

APPROVED BY:

CAS

G-02
8

1

3

2

5

4

6

7

8

MAINTENANCE PLATFORM

E

D

C-03

C-03

FOOTER

8" SCH 80 PVC BUTTERFLY VALVE WITH
EXTENSION SPINDLE AND LEVER
47'-8"

A
2'

8"

20'

8"

5'

A
8"

20'

8"

FILTER BED INLET PIPE
4" SCH 80 PVC
8"CONSTRUCTION
JOINT

4" SCH 80 PVC BUTTERFLY VALVE AND
EXTENSION SPINDLE AND LEVER
6" RISER PIPE SUMP ACCESS

D
C-03

8" TRANSFER BASIN
MANIFOLD SCH 80 PVC

C

C

C-02

C-02
UNDERDRAIN COLLECTION SYSTEM
6" PERFORATED SCH 80 PVC PIPE

B

B
REINFORCED
CONCRETE SLAB

15'

TRANSFERBASIN

FILTER BED 2

FILTER BED 1

22'

FILTER BED 2 INLET PIPE
WITH BLIND FLANGE
4" SCH 80 PVC

C

29'-6"FILTER BED 1 INLET PIPE
WITH BLIND FLANGE
4" SCH 80 PVC

I

H

C-04

C-04

C

G
C-04

8"

B

B

C-02

C-02

DISCHARGE BASIN DRAIN
TO SEEP CHANNEL
8" SCH 80 PVC PIPE
5'DOWNWARD OPENINGDISCHARGE WEIR (W3)A

A
OVERFLOW WEIR (W2)(NOTE 1)

C-02

EFFLUENTSTILLING BASINDISCHARGEBASIN

D

8" BUTTERFLY VALVE WITH
EXTENSION SPINDLE AND LEVER

INLET PIPE MANIFOLD
8" SCH 80 PVC PIPE

INFLUENTSTILLING BASIN

8" TRANSFER BASIN
MANIFOLD PIPING

C-03

INLET
CHAMBER
T1

T2

D

8"
6'-8"
2'

8"

5'

8"

8"

12'-6"

8"

7'

19'-10"8"12'-6"

5'

8"

INLET CHAMBER WEIR
(W1)

TRANSDUCER
STILLING WELL

INFLUENT STILLING
BASIN FLOW BAFFLE

TRANSDUCER
STILLING WELL

FOOTER

BYPASSSPILLWAY FLUME

3GEOSYNTEC-PW-01\DOCUMENTS\CLIENTS\C\CHEMOURS\TR0795A - CHEMOURS\CADD\03 - INTERIM REMEDIAL DESIGN - SEEP B\DRAWINGS\SHEETS\TR0795-C01

C-02

F

C-04

3
C-04

6"

E

I

H

E

D

F

G

C-04

C-04

C-03

C-03

C-03

C-04

0

11.04.21

AS-BUILT CONSTRUCTION RECORD DRAWING SUBMITTAL

JFH

CAS

REV

DATE

DESCRIPTION

DRN

APP

E

ATRIUM AT BLUE RIDGE
2501 BLUE RIDGE ROAD, SUITE 430
RALEIGH, NC 27607
919.870.0576

1
C-01

PLAN
FLOW THROUGH CELL

TITLE:SCALE: 1" = 2'

PROJECT:

CONSTRUCTION DETAILS I
THE CHEMOURS COMPANYSEEP B INTERIM REMEDIATION SYSTEMSITE:FAYETTEVILLE WORKS SITEF

0

NOTES:
1.

2

THIS DRAWING MAY NOT BE ISSUED
FOR PROJECT TENDER ORCONSTRUCTION, UNLESS SEALED.

SCALE IN FEETWEIR 2 (W2) WALL OPENING WAS FILLED WITH REINFORCED CONCRETE.

AS-BUILT CONSTRUCTION
RECORD DRAWINGS
1

2

3

4

5

F

4

6

SIGNATURE

DATE

7DESIGN BY:

CMDS

DATE:

NOVEMBER 2021

DRAWN BY:

JFH

PROJECT NO.:

TR0795ACHECKED BY:

JWE

FILE:

TR0795-C01.dwg

REVIEWED BY:

JJD

DRAWING NO.:

APPROVED BY:

CAS

C-01
8

1

3

2

DOWNWARD OPENINGDISCHARGE WEIR (W3)
(NOTE 1)

5

4

PLATFORM (TYP)

OVERFLOW WEIR (W2)(NOTE 2)

6

8" THICK REINFORCED
CONCRETE WALL (TYP)

4

5'
DISCHARGE
BASIN

7'
EFFLUENTSTILLING BASINFILTER BED 2
INLET PIPE MANIFOLD
8" SCH 80 PVC PIPE

2'

8'-2"

A

19'-10"12'-6"

INFLUENT STILLING BASIN

INLET CHAMBERFILTER BED 1
INLET PIPE MANIFOLD
8" SCH 80 PVC PIPE

8" BUTTERFLY VALVEWITH EXTENSION SPINDLE
AND LEVER (TYP)
12" PENETRATIONGEOCOMPOSITE(NOTE 3)

INFLUENT STILLING BASIN
FLOW BAFFLE

7'-6"

8

INLET CHAMBER WEIR
(W1) (NOTE 1)

C-05

A

7

3'

1"
2'-04

24" W X 24" H
WEIR OPENING

4'-8"
4'-8"
4'-6"

#5 STONE LAYER
3'

2'-9"

B

8" TRANSFER BASIN
MANIFOLD PIPINGSCH 80 PVC

3'

2'-6"

B
NOTES:
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,

47'-8"A
C-01

HANDLE LIFT, MANUFACTURER DRAWING NUMBER MD GH-42.
THE DOWNWARD OPENING DISCHARGE WEIR (W3) IS A 24"X24" STAINLESS STEELSECTION
FLOW THROUGH CELL SECTION AWEIR GATE, GEAR OPERATED, MANUFACTURER DRAWING NUMBER MD GH-66.

SCALE: 1" = 2'2.

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 FROM

8" THICK REINFORCED
CONCRETE WALLC

AGRU AMERICA, INC. THE GEOTEXTILE (DOUBLE SIDED) WAS APPARENT OPENING SIZE
0.180 MM AND 8 OZ/SQUARE YARD MASS PER UNIT AREA.

TRANSFERBASIN

FILTER BED 2CFILTER BED 1
2'-10"
4'-43
4"

8'-2"

TRANSFER BASIN
MANIFOLD PIPING
8" SCH 80 PVC (TYP)

4'-8"

7'-6"

FILTER BED INLET PIPE
4" SCH 80 PVC (TYP)

4'-8"6" PENETRATION

1"
3'-14

12" PENETRATION

D

D
47'-8"B
C-01

SECTION
FLOW THROUGH CELL SECTION BSCALE: 1" = 2'4
C-05

PLATFORM (TYP)GEOSYNTEC-PW-01\DOCUMENTS\CLIENTS\C\CHEMOURS\TR0795A - CHEMOURS\CADD\03 - INTERIM REMEDIAL DESIGN - SEEP B\DRAWINGS\SHEETS\TR0795-C02

20'

5'

20'

TRANSFER
BASIN

1/4" STEELANCHOR PLATE
(TYP)
6

E

5
W8X18 STEEL BEAM
(TYP)
C-05

FILTER BED INLET PIPE
4" SCH 80 PVC (TYP)

6" PENETRATION(TYP) (NOTE 2)

FILTER BED 2

4" BUTTERFLY VALVE WITH
EXTENSION SPINDLE AND LEVER (TYP)

TRANSFER BASIN
MANIFOLD PIPING
8" SCH 80 PVC (TYP)

C-05

GEOCOMPOSITE(NOTE 3)FILTER BED 1

0

2

4

E

SCALE IN FEET

7'-6"
8'-2"

GRANULARACTIVATED CARBONGRANULARACTIVATED CARBON

10" PENETRATION (TYP)

3'

4'-8"

UNDERDRAIN COLLECTION SYSTEM
6" PERFORATED SCH 80 PVC PIPE (TYP)

0

11.04.21

AS-BUILT CONSTRUCTION RECORD DRAWING SUBMITTAL

JFH

CAS

REV

DATE

DESCRIPTION

DRN

APP

#5 STONE LAYER

1"
3'-14

ATRIUM AT BLUE RIDGE
2501 BLUE RIDGE ROAD, SUITE 430
RALEIGH, NC 27607
919.870.0576

1'

TITLE:

CONSTRUCTION DETAILS II
2"PROJECT:

2"

THE CHEMOURS COMPANYSEEP B INTERIM REMEDIATION SYSTEM

47'-8"

C
C-01

F

SITE:

SECTION
FLOW THROUGH CELL SECTION CFAYETTEVILLE WORKS SITESCALE: 1" = 2'

THIS DRAWING MAY NOT BE ISSUED
FOR PROJECT TENDER ORCONSTRUCTION, UNLESS SEALED.

AS-BUILT CONSTRUCTION
RECORD DRAWINGS
1

2

3

4

5

6

SIGNATURE

DATE

7

F

DESIGN BY:

CMDS

DATE:

NOVEMBER 2021

DRAWN BY:

JFH

PROJECT NO.:

TR0795ACHECKED BY:

JWE

FILE:

TR0795-C02.dwg

REVIEWED BY:

JJD

DRAWING NO.:

APPROVED BY:

CAS

C-02
8

1

3

2

5

4

6

7

8

A

A

4
C-05

PLATFORM (TYP)

15'

8" THICK REINFORCED
CONCRETE WALL

5'

INFLUENTSTILLING BASIN

TRANSFERBASIN

5'

RIPRAP
BYPASS SPILLWAY(BY OTHERS)

8"8" BUTTERFLY VALVE WITH
EXTENSION SPINDLE AND LEVER (TYP)FILTER BED WALL
12" PENETRATION(TYP)

8" TRANSFER BASIN
MANIFOLD PIPINGSCH 80 PVC

B

1'

6"
5'

BYPASS SPILLWAY FLUME

INFLUENTSTILLING BASIN

1'

1'

B

7'-6"
8'-2"

CONSTRUCTION JOINT

6" REINFORCED
CONCRETE SLAB

6'

FILL SOIL PLACED IN ACCORDANCEWITH CIVIL DESIGN BY OTHER
2'-9"
FOOTER
2'

2'

2"

F
C-01

UNDERDRAIN COLLECTION SYSTEM
6" PERFORATED SCH 80 PVC PIPE (TYP)SCALE: 1" = 2'

22'

D
C-01

C

SECTION
BYPASS SPILLWAY FLOW MEASUREMENT FLUME

SECTION
FLOW THROUGH CELL SECTION DCSCALE: 1" = 2'

PLATFORM
16'-4"

8" THICK REINFORCED
CONCRETE WALL

D

C-05

5'

5'

6" PENETRATIONFLOW BAFFLE

5'

BYPASS SPILLWAY FLUME

6'

TRANSFER BASIN
MANIFOLD PIPING
8" SCH 80 PVC (TYP)

7'-6"
8'-2"
GEOSYNTEC-PW-01\DOCUMENTS\CLIENTS\C\CHEMOURS\TR0795A - CHEMOURS\CADD\03 - INTERIM REMEDIAL DESIGN - SEEP B\DRAWINGS\SHEETS\TR0795-C03

D

1'

INFLUENTSTILLING BASINFILTER BED INLET PIPE
4" SCH 80 PVC (TYP)
2'-10"

44'-8"10" PENETRATION
2'-9"

2'-6"

FOOTER
2'

2'
0

E

2

4

E

SCALE IN FEETUNDERDRAIN COLLECTION SYSTEM
6" PERFORATED SCH 80 PVC PIPE (TYP)

5" (TYP)
011.04.21

AS-BUILT CONSTRUCTION RECORD DRAWING SUBMITTAL

JFH

CAS

REV

DATE

DESCRIPTION

DRN

APP

22'

E
C-01

SECTION
FLOW THROUGH CELL SECTION EATRIUM AT BLUE RIDGE
2501 BLUE RIDGE ROAD, SUITE 430
RALEIGH, NC 27607
919.870.0576

SCALE: 1" = 2'
TITLE:

CONSTRUCTION DETAILS III
PROJECT:THE CHEMOURS COMPANYSEEP B INTERIM REMEDIATION SYSTEMSITE:FAYETTEVILLE WORKS SITEF
THIS DRAWING MAY NOT BE ISSUED
FOR PROJECT TENDER ORCONSTRUCTION, UNLESS SEALED.

AS-BUILT CONSTRUCTION
RECORD DRAWINGS
1

2

3

4

5

6

SIGNATURE

DATE

7

F

DESIGN BY:

CMDS

DATE:

NOVEMBER 2021

DRAWN BY:

JFH

PROJECT NO.:

TR0795ACHECKED BY:

JWE

FILE:

TR0795-C03.dwg

REVIEWED BY:

JJD

DRAWING NO.:

APPROVED BY:

CAS

C-03
8

1

3

2

8" THICK REINFORCED
CONCRETE WALLCONSTRUCTION
JOINT

1'-11"

8A

8" THICK REINFORCED
CONCRETE WALLCONSTRUCTION
JOINT

5'

FILTER BED 2

FILTER BED 2

2'-6"

5'

3'
INLET PIPE MANIFOLD
8" SCH 80 PVC PIPEBYPASS SPILLWAY
FLUME

BYPASS SPILLWAYFLUME

INLET PIPE MANIFOLD
8" SCH 80 PVC PIPEBYPASS SPILLWAY
FLUME

12" PENETRATION

12" PENETRATION

7'-6"
5'

8" TRANSFER BASIN
MANIFOLD PIPINGSCH 80 PVC

CONSTRUCTIONJOINT (TYP)

4'-6"CONSTRUCTIONJOINT (TYP)

4'-8"

8"

2'

8'-2"

CONSTRUCTIONJOINT (TYP)

4'-8"

1"
3'-14

12" PENETRATION

B

2'-4"

8'-2"

7'-6"

2'

1'-8"

7'-6"

8'-2"

CONSTRUCTIONJOINTDISCHARGE
BASIN WEIR

8"8"FILTER BED 1

7

OVERFLOW WEIR (W2)(NOTE 2)8" THICK REINFORCED
CONCRETE WALL
2'-6"

6

DOWNWARD OPENINGDISCHARGE WEIR (W3)
(NOTE 1)

INLET CHAMBER WEIR
(W1) (NOTE 1)

A

5

4

3'

B
2'

2'

2'

8"

8"

8"

G
C-01

H
C-01

SECTION
INLET CHAMBER WEIR (W1)
SCALE: 1" = 2'

I
C-01

SECTIONOVERFLOW WEIR (W2)
SCALE: 1" = 2'

SECTION
DOWNWARD OPENING DISCHARGE WEIR (W3)
SCALE: 1" = 2'CCTOP OF WALL
NON-STRETCH
TRANSDUCER CABLE

BOLT AND NUT

FLOW
THROUGH
CELL WALL

D
2" PVC CAP

2" PVC PIPE SECURED TO
A FIXED LOCATION ABOVEMAXIMUM WATER LEVELBAROLOGGER 3001
OR EQUIVALENTD

2" PVC PIPENOTES:
1.

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,GEOSYNTEC-PW-01\DOCUMENTS\CLIENTS\C\CHEMOURS\TR0795A - CHEMOURS\CADD\03 - INTERIM REMEDIAL DESIGN - SEEP B\DRAWINGS\SHEETS\TR0795-C04

2'
SOLINST 3001 LT F30/M10
TRANSDUCER

HANDLE LIFT, MANUFACTURER DRAWING NUMBER MD GH-42.

ANCHOR BRACKETTHE DOWNWARD OPENING DISCHARGE WEIR (W3) IS A 24"X24" STAINLESS STEELWEIR GATE, GEAR OPERATED, MANUFACTURER DRAWING NUMBER MD GH-66.

1/2" (MAX)
DIAMETER HOLES
2" PVC CAP WITHDRAIN HOLE

2.

WEIR 2 (W2) WALL OPENING WAS FILLED WITH REINFORCED CONCRETE.

E

E
SLAB FLOOR

2
C-04

3
C-01

DETAIL
BAROMETRIC PRESSURE
TRANSDUCER ENCLOSURE

011.04.21

AS-BUILT CONSTRUCTION RECORD DRAWING SUBMITTAL

JFH

CAS

REV

DATE

DESCRIPTION

DRN

APP

DETAIL
TRANSDUCER STILLING WELLATRIUM AT BLUE RIDGE
2501 BLUE RIDGE ROAD, SUITE 430
RALEIGH, NC 27607
919.870.0576

SCALE: 1" = 1'

SCALE: 1" = 6"
TITLE:

CONSTRUCTION DETAILS IV
PROJECT:THE CHEMOURS COMPANYSEEP B INTERIM REMEDIATION SYSTEMSITE:FAYETTEVILLE WORKS SITEF
THIS DRAWING MAY NOT BE ISSUED
FOR PROJECT TENDER ORCONSTRUCTION, UNLESS SEALED.

AS-BUILT CONSTRUCTION
RECORD DRAWINGS
1

2

3

4

5

6

SIGNATURE

DATE

7

F

DESIGN BY:

CMDS

DATE:

NOVEMBER 2021

DRAWN BY:

JFH

PROJECT NO.:

TR0795ACHECKED BY:

JWE

FILE:

TR0795-C04.dwg

REVIEWED BY:

JJD

DRAWING NO.:

APPROVED BY:

CAS

C-04
8

1

3

2

5

4

MAINTENANCE PLATFORM

6

7

8

5'

FILTER BED INLET PIPE
4" SCH 80 PVC (TYP)
4" SCH 80 PVC BUTTERFLY VALVE AND
EXTENSION SPINDLE AND LEVER (TYP)

A

A

5'

UNDERDRAIN COLLECTION SYSTEM
6" PERFORATED SCH 80 PVC PIPE (TYP)

15'

5'

FILTER BED 2

TRANSFERBASIN

PLATFORM GRATINGFILTER BED 1

STEEL ANCHOR PLATE (TYP)

8" TRANSFER BASIN
MANIFOLD (TYP)

W8X18 STEEL BEAM (TYP)

6
C-05

B

B

FILTER BED 2 INLET PIPE
4" SCH 80 PVC (TYP)

5'

FILTER BED 1 INLET PIPE
4" SCH 80 PVC (TYP)

4"

C

C

DISCHARGE BASIN DRAIN
TO SEEP CHANNEL
8" SCH 80 PVC PIPE

9"5'
INLET PIPE MANIFOLD
8" SCH 80 PVC PIPE (TYP)

3'
EFFLUENTSTILLING BASINDISCHARGE
BASIN

INLET
CHAMBERINFLUENTSTILLING BASIN

T1

T2

5'

19'-10"7'

ADJUSTABLE(DOWNWARD
OPENING) WEIR WITH
GEAR ACTUATOR

D

8" TRANSFER BASIN
MANIFOLD PIPING

12'-6"UPWARD OPENING ACCESS DOOR.
2' WIDTH (MAX) (TYP)
TRANSDUCER
STILLING WELL

8" BUTTERFLY VALVE WITH
EXTENSION SPINDLE AND LEVER(TYP)

INFLUENT STILLING
BASIN FLOW BAFFLE

RECTANGULAR WEIRWITH HAND PULL (TYP)

TRANSDUCER
STILLING WELL

BYPASSSPILLWAY FLUME

3

3'-2"

D

3
C-04

C-04

GEOSYNTEC-PW-01\DOCUMENTS\CLIENTS\C\CHEMOURS\TR0795A - CHEMOURS\CADD\03 - INTERIM REMEDIAL DESIGN - SEEP B\DRAWINGS\SHEETS\TR0795-C06

BYPASS SPILLWAY

4
C-02

PLAN
PLATFORM INSTALLATIONSCALE: 1" = 2'0E

1/4" STEEL ANCHOR PLATE

PLATFORM
TOP OF WALL

6

4

1/4" STEEL ANCHOR PLATE

C-05

W8X18 STEEL BEAM
4"

W8X18 STEEL BEAM

3"

2"

2"

0

11.04.21

AS-BUILT CONSTRUCTION RECORD DRAWING SUBMITTAL

JFH

CAS

REV

DATE

DESCRIPTION

DRN

APP

1"
416

ATRIUM AT BLUE RIDGE
2501 BLUE RIDGE ROAD, SUITE 430
RALEIGH, NC 27607
919.870.0576

1"
88

2"
1"
12

1"
416

(2) 7/8" DIA HOLE THRU
FOR (2) 3/4" ANCHOR BOLT
C-05

TITLE:

PLATFORM DETAILS

5

3/4" DIA CAST-IN
ANCHOR BOLT

4"

13
8"

1"
54

13
8"

PROJECT:THE CHEMOURS COMPANYSEEP B INTERIM REMEDIATION SYSTEM

3/16"

8"
NUT

SITE:

6
C-05

WASHER

8"FAYETTEVILLE WORKS SITE

DETAILSTEEL ANCHOR PLATE

THIS DRAWING MAY NOT BE ISSUED
FOR PROJECT TENDER ORCONSTRUCTION, UNLESS SEALED.

SCALE: 1" = 6"5
C-05

DETAILANCHOR BOLT DETAIL

AS-BUILT CONSTRUCTION
RECORD DRAWINGSSCALE: 1" = 6"

1

2

E

SCALE IN FEET

4"

F

6

C-05

4"

6"

3

3

4

5

6

SIGNATURE

DATE

7

F

DESIGN BY:

CMDS

DATE:

NOVEMBER 2021

DRAWN BY:

JFH

PROJECT NO.:

TR0795ACHECKED BY:

JWE

FILE:

TR0795-C06.dwg

REVIEWED BY:

JJD

DRAWING NO.:

APPROVED BY:

CAS

C-05
8

1

3

2

5

4

6

7

8

8" SCH 80 PVC BUTTERFLY VALVE (TYP)FILTER BED 2(FB2)4" SCH 80 PVC BUTTERFLY (TYP)
V2

V11

TRANSFERBASIN

FILTER BED 1
(FB1)

V1

V10

A

A
V9

V12

OPERATIONAL MODE

6" RISER PUMP SUMP ACCESS (TYP)

UNDERDRAIN COLLECTION SYSTEM
6" PERFORATED PVC PIPE (TYP)

V13

V7

V15

V6

B

V5

V16

V3

V4

FB1 LAG/FB2
LEAD

FB1
CHANGEOUT(FB2 OPEN)

FB2
CHANGEOUT(FB1 OPEN)

VALVE V1OPEN

CLOSED

CLOSED

CLOSEDVALVE V2

CLOSEDOPEN

CLOSED

CLOSEDVALVE V3

CLOSEDOPEN

CLOSEDOPEN

VALVE V4OPEN

CLOSEDOPEN

CLOSEDVALVE V5

CLOSEDOPEN

CLOSED

CLOSEDVALVE V6

CLOSEDOPEN

CLOSED

CLOSEDVALVE V7

CLOSEDOPEN

CLOSED

CLOSEDVALVE V8

CLOSEDOPEN

CLOSED

CLOSEDVALVE V9

CLOSEDOPEN

CLOSED

CLOSEDVALVE V10

CLOSEDOPEN

CLOSED

CLOSEDVALVE V11OPEN

CLOSED

CLOSED

CLOSEDVALVE V12OPEN

CLOSED

CLOSED

CLOSEDVALVE V13OPEN

CLOSED

CLOSED

CLOSEDVALVE V14OPEN

CLOSED

CLOSED

CLOSEDVALVE V15OPEN

CLOSED

CLOSED

CLOSEDVALVE V16OPEN

CLOSED

CLOSED

CLOSEDVALVE V17

OPEN

CLOSED

CLOSEDOPEN

VALVE V18

CLOSED

OPEN

OPEN

CLOSEDWEIR W1

OPEN

OPEN

OPEN

OPEN

V18

WEIR W3

EFFLUENTSTILLING BASINDISCHARGEBASIN

INFLUENTSTILLING BASIN

OVERFLOW WEIR (W2)(NOTE 1)DOWNWARD OPENINGDISCHARGE WEIR (W3)

7
D-01

PLAN
FLOW THROUGH CELL VALVE SCHEMATIC

V1
FILTER BED 1 (FB1)

V11

V10

V12

V9

V1
FILTER BED 1 (FB1)

D

V10

V11

V13

V8

V14

V7

V15

V6

V16

V5

V9

V12
V13

V8

V14

V7

V15

V6

V16

V5

V4

V4

E
V18
EFFLUENTSTILLING
BASIN

W1
V17

W2

8" SCH 80 PVC
BUTTERFLY VALVE (TYP)

INLETCHAMBERW3
DISCHARGEBASIN

WEIR W3

V18
EFFLUENTSTILLING
BASIN

PONDED
INLET WATER

W1
V17

W2

8" SCH 80 PVC
BUTTERFLY VALVE (TYP)

INLETCHAMBERPONDED
INLET WATERE

WEIR W1

INFLUENT STILLING BASIN

WEIR W2WEIR W1

INFLUENT STILLING BASIN

10
D-01

WEIR W2

9
D-01

V3

V3
DISCHARGE
TO SEEPCHANNELWEIR W3C

8" SCH 80 PVC BUTTERFLY VALVE (TYP)FILTER BED 2 (FB2)FILTER BED 2 (FB2)DISCHARGE
BASIN

TABLE
OPERATIONAL MODE

8" SCH 80 PVC BUTTERFLY VALVE (TYP)
V2

W3

OPEN

TRANSFER BASIN

4" SCH 80 PVC
BUTTERFLY (TYP)

V2

D

OPEN

INLET CHAMBERWEIR (W1)

TRANSFER BASIN

4" SCH 80 PVC
BUTTERFLY (TYP)

OPEN

8
D-01

INLET CHAMBERUNDERDRAIN COLLECTION SYSTEM
6" PERFORATED PVC (TYP)

UNDERDRAIN COLLECTION SYSTEM
6" PERFORATED PVC (TYP)

OPEN

W1

8" SCH 80 PVC
BUTTERFLY VALVE (TYP)

W2

W3

C

V17

B

PERMANENTLY CLOSED: CANNOT BE OPENEDWEIR W2DISCHARGE BASIN DRAIN
TO SEEP CHANNEL
8" SCH 80 PVC PIPEGEOSYNTEC-PW-01\DOCUMENTS\CLIENTS\C\CHEMOURS\TR0795A - CHEMOURS\CADD\03 - INTERIM REMEDIAL DESIGN - SEEP B\DRAWINGS\SHEETS\TR0795-D01

FB1 LEAD/FB2
LAG

V8

V14

DISCHARGE
TO SEEPCHANNELFLOW
CONTROL
DEVICESCHEMATICFLOW THROUGH CELL SYSTEM FLOWWITH FILTER BED 1 IN LEAD POSITION
AND FILTER BED 2 IN LAG POSITIONSCHEMATICFLOW THROUGH CELL SYSTEM FLOWWITH FILTER BED 2 IN LEAD POSITION
AND FILTER BED 1 IN LAG POSITION

011.04.21

AS-BUILT CONSTRUCTION RECORD DRAWING SUBMITTAL

JFH

CAS

REV

DATE

DESCRIPTION

DRN

APP

ATRIUM AT BLUE RIDGE
2501 BLUE RIDGE ROAD, SUITE 430
RALEIGH, NC 27607
919.870.0576

TITLE:PROCESS FLOW DIAGRAM
PROJECT:THE CHEMOURS COMPANYSEEP B INTERIM REMEDIATION SYSTEMSITE:FAYETTEVILLE WORKS SITEFNOTES:
1.

THIS DRAWING MAY NOT BE ISSUED
FOR PROJECT TENDER ORCONSTRUCTION, UNLESS SEALED.

WEIR 2 (W2) WALL OPENING WAS FILLED WITH REINFORCED CONCRETE.

AS-BUILT CONSTRUCTION
RECORD DRAWINGS
1

2

3

4

5

6

SIGNATURE

DATE

7

F

DESIGN BY:

CMDS

DATE:

NOVEMBER 2021

DRAWN BY:

JFH

PROJECT NO.:

TR0795ACHECKED BY:

JWE

FILE:

TR0795-D01.dwg

REVIEWED BY:

JJD

DRAWING NO.:

APPROVED BY:

CAS

D-01
8

APPENDIX D
Transducer Data Reduction

TR0795A

39
38.8
38.6
38.4

Elevation (ft msl)

38.2
38
37.8
37.6
37.4
37.2

−−

LegendDischarge Basin Elevation
Weir 3 Elevation

9/30/21

9/28/21

9/26/21

9/24/21

9/22/21

9/20/21

9/18/21

9/16/21

9/14/21

9/12/21

9/10/21

9/8/21

9/6/21

9/4/21

9/2/21

8/31/21

8/29/21

8/27/21

8/25/21

8/23/21

8/21/21

8/19/21

8/17/21

8/15/21

8/13/21

8/11/21

8/9/21

8/7/21

8/5/21

8/3/21

8/1/21

37

Transducer Data Gap

Notes:
Figure D1 shows the discharge basin transducer data that was collected during the reporting period.
Transducer data from August 27, 16:34 through August 30, 15:08 was not retrieved. Section 3 describes the gaps in transducer data record.

Discharge Basin Water Elevation Seep B
Chemours Fayetteville Works
Fayetteville, North Carolina

FigureRaleigh, NC

November 2021

D1

41

39

Elevation (ft msl)

37

35

33

31

9/30/21

9/28/21

9/26/21

9/24/21

9/22/21

9/20/21

9/18/21

9/16/21

9/14/21

9/12/21

9/10/21

9/8/21

9/6/21

9/4/21

9/2/21

8/31/21

8/29/21

8/27/21

8/25/21

8/23/21

8/21/21

8/19/21

8/17/21

8/15/21

8/13/21

8/11/21

8/9/21

8/7/21

8/5/21

8/3/21

8/1/2129

Precipitation (in)

5
4
3
2
1
0

−−
−

LegendDischarge Basin Water Elevation
River Stage
Weir 3 Elevation

Transducer Data Gap
Precipitation (daily totals)

Notes:
As water can flow through the flow-through cell both as a result of wet weather inflow and elevated river levels from flooding, Figure D2 compares the available transducer data to precipitation and river stage
elevation data available from the USGS Huske Lock and Dam.
Transducer data from August 27, 16:34 through August 30, 15:08 was not retrieved. Section 3 describes the gaps in transducer data record.

Discharge Basin Water Elevation andExternal Forcings - Seep B
Chemours Fayetteville Works
Fayetteville, North Carolina

FigureRaleigh, NC

November 2021

D2

43

42.5

Elevation (ft msl)

42

41.5

41

40.5

−

Legend

9/30/21

9/28/21

9/26/21

9/24/21

9/22/21

9/20/21

9/18/21

9/16/21

9/14/21

9/12/21

9/10/21

9/8/21

9/6/21

9/4/21

9/2/21

8/31/21

8/29/21

8/27/21

8/25/21

8/23/21

8/21/21

8/19/21

8/17/21

8/15/21

8/13/21

8/11/21

8/9/21

8/7/21

8/5/21

8/3/21

8/1/2140

Influent Chamber/Impoundment Elevation
Transducer Data Gap

Notes:
Figure D3 shows the influent transducer data that was collected during the reporting period.

Transducer data from August 27, 16:34 to August 30, 15:08 were not retrieved. Section 3 describes the gaps in transducer data record.

Inlet Chamber Water Elevation Seep B
Chemours Fayetteville Works
Fayetteville, North Carolina

FigureRaleigh, NC

November 2021

D3

43
41

Elevation (ft msl)

39
37
35
33
31

9/30/21

9/28/21

9/26/21

9/24/21

9/22/21

9/20/21

9/18/21

9/16/21

9/14/21

9/12/21

9/10/21

9/8/21

9/6/21

9/4/21

9/2/21

8/31/21

8/29/21

8/27/21

8/25/21

8/23/21

8/21/21

8/19/21

8/17/21

8/15/21

8/13/21

8/11/21

8/9/21

8/7/21

8/5/21

8/3/21

8/1/2129

Precipitation (in)

5
4
3
2
1
0

−−

Legend

Inlet Chamber Water Elevation
River Stage
Bypass Spillway Elevation

Transducer Data Gap
Precipitation (daily totals)

Notes:
As water can flow through the Bypass Spillway both as a result of wet weather inflow and elevated river levels from flooding, Figure D4 compares the available transducer data
to precipitation and river stage elevation data available from the USGS Huske Lock and Dam.

Inlet Chamber Water Elevation andExternal Forcings - Seep B
Chemours Fayetteville Works
Fayetteville, North Carolina

Transducer data from August 27, 16:34 to August 30, 15:08 were not retrieved. Section 3 describes the gaps in transducer data record.

FigureRaleigh, NC

November 2021

D4

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

TR0795AADQM Data Review
Site: Chemours Fayetteville
Project: Seep Flow Through Cell Sampling 2021 (select lots)
Project Reviewer: Michael Aucoin

Sample Summary
Field
Sample ID
SEEP-AINFLUENT336-081721
SEEP-DEFFLUENT336081721-D
SEEP-AEFFLUENT306-081721
SEEP-CINFLUENT336-081721
SEEP-CEFFLUENT336-081721
SEEP-DINFLUENT306-081721
SEEP-DEFFLUENT336-081721
SEEP-BINFLUNET336-081721
SEEP-BEFFLUENT336-081721
SEEPFBLK081721
SEEP-AINFLUENT24-082021
SEEP-AEFFLUENT24-082021
SEEP-CINFLUENT24-082021
SEEP-CEFFLUENT24-082021
SEEP-DINFLUENT24-082021
SEEP-DEFFLUENT24-082021
SEEP-BINFLUENT24-082021

Lab
Sample ID

SampleMatrixFiltered

SampleDate

SampleTime

SamplePurpose320-778031

Other liquidN

08/17/2021

10:00

FS

320-7780310

Other liquidN

08/17/2021

10:00

DUP

320-778032

Other liquidN

08/17/2021

10:00

FS

320-778033

Other liquidN

08/17/2021

10:00

FS

320-778034

Other liquidN

08/17/2021

10:00

FS

320-778035

Other liquidN

08/17/2021

10:00

FS

320-778036

Other liquidN

08/17/2021

10:00

FS

320-778037

Other liquidN

08/17/2021

10:00

FS

320-778038

Other liquidN

08/17/2021

10:00

FS

320-778039

Blank Water

N

08/17/2021

10:00

FB

320-781111

SurfaceWater

N

08/20/2021

19:00

FS

320-781112

SurfaceWater

N

08/20/2021

19:00

FS

320-781113

SurfaceWater

N

08/20/2021

19:00

FS

320-781114

SurfaceWater

N

08/20/2021

19:00

FS

320-781115

SurfaceWater

N

08/20/2021

19:00

FS

320-781116

SurfaceWater

N

08/20/2021

19:00

FS

320-781117

SurfaceWater

N

08/20/2021

19:00

FS

SEEP-BEFFLUENT24-082021
SEEP-AINFLUENT24-082821
SEEP-AEFFLUENT24-082821
SEEP-CINFLUENT24-082821
SEEP-CEFFLUENT24-082821
SEEP-DINFLUENT24-082821
SEEP-DEFFLUENT24-082821
SEEP-BINFLUENT24-082821
SEEP-BEFFLUENT24-082821
SEEP-BINFLUENT210-090921
SEEP-BEFFLUENT210-090921
SEEP-BINFLUENT330-092321
SEEP-BEFFLUENT336-092321
SEEP-BEFFLUENT168-100121
SEEP-BINFLUENT168-100121

320-781118

SurfaceWater

N

08/20/2021

19:00

FS

320-784281

Other liquidN

08/28/2021

19:00

FS

320-784282

Other liquidN

08/28/2021

19:00

FS

320-784283

Other liquidN

08/28/2021

19:00

FS

320-784284

Other liquidN

08/28/2021

19:00

FS

320-784285

Other liquidN

08/28/2021

19:00

FS

320-784286

Other liquidN

08/28/2021

19:00

FS

320-784287

Other liquidN

08/28/2021

19:00

FS

320-784288

Other liquidN

08/28/2021

19:00

FS

320-787651

Other liquidN

09/09/2021

12:00

FS

320-787652

Other liquidN

09/09/2021

12:00

FS

320-796391

Other liquidN

09/23/2021

11:01

FS

320-796392

Other liquidN

09/23/2021

11:00

FS

320-796963

Other liquidN

10/01/2021

06:00

FS

320-796964

Other liquidN

10/01/2021

06:00

FS

* FS=Field Sample
DUP=Field Duplicate
FB=Field Blank
EB=Equipment Blank
TB=Trip BlankAnalytical Protocol
Lab Name

Lab Method

Eurofins TestAmerica,
Sacramento

Cl. Spec. Table 3
Compound SOPParameter Category
Per- andPolyfluorinated Alkyl
Substances (PFAS)

Sampling Program
Seep Flow ThroughCell Sampling 2021

ADQM Data Review Checklist

Item
A

B
C
D

E

F
G
ER#

Description
Did samples meet laboratory acceptability requirements
upon receipt (i.e., intact, within temperature, properly
preserved, and no headspace where applicable)?
Were samples received by the laboratory in agreementwith the associated chain of custody?
Was the chain of custody properly completed by thelaboratory and/or field team?
Were samples prepped/analyzed by the laboratory within
method holding times?
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)?
Were field/equipment/trip blanks (if collected) detected at
levels not requiring sample data qualification?
Were all data usable and not R qualified?
Description:

Yes

No*

DVM
Narrative
ReportX

X

Laboratory
ReportException
Report(ER) #

X
X
X
X

X
X

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 beposted 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 datausability. 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 isevaluated 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. Thisqualifier may have many different meanings and can vary between labs and over time within thesame 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 thisfield contains the qualifier resulting from the ADQM DVM review process. This qualifier assesses theusability of the data and may not equal the lab qualifier. The DVM applies the following data
evaluation qualifiers to analysis results, as warranted:
Qualifier
B
R
J
UJ

Definition
Not detected substantially above the level reported in the laboratory or fieldblanks.
Unusable result. Analyte may or may not be present in the sample.
Analyte present. Reported value may not be accurate or precise.
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 Report
Site: Fayetteville
Validation Reason

Sampling Program: Seep Flow Through Cell Sampling 2021

Validation Options: LABSTATS

Associated MS and/or MSD analysis had relative percent recovery (RPR) values less than the lower control limit. The actual detection limits may behigher than reported.
Date
Sampled Lab Sample ID

AnalyteSEEP-D-EFFLUENT-336081721

08/17/2021 320-77803-6

PFMOAA

0.0020ug/L

PQL

0.0020UJ

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-D-EFFLUENT-336081721

08/17/2021 320-77803-6

PFMOAA

0.0020ug/L

PQL

0.0020UJ

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

Field Sample ID

Result Units TypeMDL

Validation
PQL Qualifier

Analytical
MethodPre-prep

Prep

Page 1 of 6

Site: Fayetteville
Validation Reason

Sampling Program: Seep Flow Through Cell Sampling 2021

Validation Options: LABSTATS

Associated LCS and/or LCSD analysis had relative percent recovery (RPR) values higher than the upper control limit. The reported result may bebiased high.
Date
Sampled Lab Sample ID

AnalyteSEEP-D-INFLUENT-306081721

08/17/2021 320-77803-5

R-PSDA

0.73 UG/L

PQL

0.071

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-A-INFLUENT-336081721

08/17/2021 320-77803-1

R-PSDA

2.1 UG/L

PQL

0.071

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-B-INFLUNET-336081721

08/17/2021 320-77803-7

R-PSDA

4.8 UG/L

PQL

0.071

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-C-INFLUENT-336081721

08/17/2021 320-77803-3

R-PSDA

0.88 UG/L

PQL

0.071

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

Field Sample ID

Result Units TypeMDL

Validation
PQL Qualifier

Analytical
MethodPre-prep

Prep

Page 2 of 6

Site: Fayetteville
Validation Reason

Sampling Program: Seep Flow Through Cell Sampling 2021

Validation Options: LABSTATS

Uncertainty around the analysis of R-PSDA, Hydrolyzed PSDA and R-EVE; J-qualifier added to all detects in the data set, even if there was no matrix
spike analyzed for that particular sample.
Date
Sampled Lab Sample ID

AnalyteSEEP-D-INFLUENT-306081721

08/17/2021 320-77803-5

Hydrolyzed PSDA

2.0 UG/L

PQL

0.038

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-D-INFLUENT-306081721

08/17/2021 320-77803-5

R-EVE

0.73 UG/L

PQL

0.072

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-A-EFFLUENT-24082021

08/20/2021 320-78111-2

Hydrolyzed PSDA

0.0022 UG/L

PQL

0.0020J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-A-INFLUENT-24082021

08/20/2021 320-78111-1

R-PSDA

1.7 UG/L

PQL

0.071

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-A-INFLUENT-24082021

08/20/2021 320-78111-1

Hydrolyzed PSDA

19 UG/L

PQL

0.038

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-A-INFLUENT-24082021

08/20/2021 320-78111-1

R-EVE

0.97 UG/L

PQL

0.072

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-B-INFLUENT-24082021

08/20/2021 320-78111-7

R-PSDA

4.0 UG/L

PQL

0.071

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-B-INFLUENT-24082021

08/20/2021 320-78111-7

Hydrolyzed PSDA

29 UG/L

PQL

0.038

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-B-INFLUENT-24082021

08/20/2021 320-78111-7

R-EVE

3.2 UG/L

PQL

0.072

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-C-INFLUENT-24082021

08/20/2021 320-78111-3

R-PSDA

0.58 UG/L

PQL

0.071

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-C-INFLUENT-24082021

08/20/2021 320-78111-3

Hydrolyzed PSDA

0.70 UG/L

PQL

0.038

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-C-INFLUENT-24082021

08/20/2021 320-78111-3

R-EVE

0.55 UG/L

PQL

0.072

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-D-INFLUENT-24082021

08/20/2021 320-78111-5

R-PSDA

0.56 UG/L

PQL

0.071

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-D-INFLUENT-24082021

08/20/2021 320-78111-5

Hydrolyzed PSDA

1.3 UG/L

PQL

0.038

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-D-INFLUENT-24082021

08/20/2021 320-78111-5

R-EVE

0.58 UG/L

PQL

0.072

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-A-EFFLUENT-24082821

08/28/2021 320-78428-2

R-PSDA

0.0075 UG/L

PQL

0.0020J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

Field Sample ID

Result Units TypeMDL

Validation
PQL Qualifier

Analytical
MethodPre-prep

Prep

Page 3 of 6

Site: Fayetteville
Validation Reason

Sampling Program: Seep Flow Through Cell Sampling 2021

Validation Options: LABSTATS

Uncertainty around the analysis of R-PSDA, Hydrolyzed PSDA and R-EVE; J-qualifier added to all detects in the data set, even if there was no matrix
spike analyzed for that particular sample.
Date
Sampled Lab Sample ID

AnalyteSEEP-A-EFFLUENT-24082821

08/28/2021 320-78428-2

Hydrolyzed PSDA

0.073 UG/L

PQL

0.0020J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-A-EFFLUENT-24082821

08/28/2021 320-78428-2

R-EVE

0.0053 UG/L

PQL

0.0020J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-A-INFLUENT-24082821

08/28/2021 320-78428-1

R-PSDA

2.2 UG/L

PQL

0.071

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-A-INFLUENT-24082821

08/28/2021 320-78428-1

Hydrolyzed PSDA

23 UG/L

PQL

0.038

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-A-INFLUENT-24082821

08/28/2021 320-78428-1

R-EVE

1.0 UG/L

PQL

0.072

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-B-INFLUENT-24082821

08/28/2021 320-78428-7

R-PSDA

3.6 UG/L

PQL

0.071

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-B-INFLUENT-24082821

08/28/2021 320-78428-7

Hydrolyzed PSDA

23 UG/L

PQL

0.038

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-B-INFLUENT-24082821

08/28/2021 320-78428-7

R-EVE

2.2 UG/L

PQL

0.072

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-C-INFLUENT-24082821

08/28/2021 320-78428-3

R-PSDA

0.79 UG/L

PQL

0.071

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-C-INFLUENT-24082821

08/28/2021 320-78428-3

Hydrolyzed PSDA

0.92 UG/L

PQL

0.038

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-C-INFLUENT-24082821

08/28/2021 320-78428-3

R-EVE

0.64 UG/L

PQL

0.072

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-D-INFLUENT-24082821

08/28/2021 320-78428-5

R-PSDA

0.43 UG/L

PQL

0.071

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-D-INFLUENT-24082821

08/28/2021 320-78428-5

Hydrolyzed PSDA

0.98 UG/L

PQL

0.038

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-D-INFLUENT-24082821

08/28/2021 320-78428-5

R-EVE

0.32 UG/L

PQL

0.072

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-B-INFLUENT-210090921

09/09/2021 320-78765-1

R-PSDA

3.9 UG/L

PQL

0.071

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-B-INFLUENT-210090921

09/09/2021 320-78765-1

Hydrolyzed PSDA

32 UG/L

PQL

0.038

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-B-EFFLUENT-168100121

10/01/2021 320-79696-3

Hydrolyzed PSDA

0.0062 UG/L

PQL

0.0020J

Cl. Spec. Table 3
Compound

PFAS_DI_Prep

Field Sample ID

Result Units TypeMDL

Validation
PQL Qualifier

Analytical
MethodPre-prep

Prep

Page 4 of 6

Site: Fayetteville
Validation Reason

Field Sample ID

Sampling Program: Seep Flow Through Cell Sampling 2021

Validation Options: LABSTATS

Uncertainty around the analysis of R-PSDA, Hydrolyzed PSDA and R-EVE; J-qualifier added to all detects in the data set, even if there was no matrix
spike analyzed for that particular sample.
Date
Sampled Lab Sample ID

AnalyteResult Units TypeMDL

Validation
PQL Qualifier

Analytical
MethodPre-prep

Prep

SOP
SEEP-B-EFFLUENT-336092321

09/23/2021 320-79639-2

R-PSDA

0.0043 UG/L

PQL

0.0020J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-B-EFFLUENT-336092321

09/23/2021 320-79639-2

Hydrolyzed PSDA

0.023 UG/L

PQL

0.0020J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-B-EFFLUENT-336092321

09/23/2021 320-79639-2

R-EVE

0.0037 UG/L

PQL

0.0020J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-B-INFLUENT-168100121

10/01/2021 320-79696-4

R-PSDA

7.1 UG/L

PQL

0.071

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-B-INFLUENT-168100121

10/01/2021 320-79696-4

Hydrolyzed PSDA

54 UG/L

PQL

0.038

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-B-INFLUENT-168100121

10/01/2021 320-79696-4

R-EVE

4.4 UG/L

PQL

0.072

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-B-INFLUENT-210090921

09/09/2021 320-78765-1

R-EVE

1.9 UG/L

PQL

0.072

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-B-INFLUENT-330092321

09/23/2021 320-79639-1

R-PSDA

5.1 UG/L

PQL

0.071

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-B-INFLUENT-330092321

09/23/2021 320-79639-1

Hydrolyzed PSDA

42 UG/L

PQL

0.038

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-B-INFLUENT-330092321

09/23/2021 320-79639-1

R-EVE

3.1 UG/L

PQL

0.072

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-A-EFFLUENT-306081721

08/17/2021 320-77803-2

Hydrolyzed PSDA

0.0058 UG/L

PQL

0.0020J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-A-INFLUENT-336081721

08/17/2021 320-77803-1

Hydrolyzed PSDA

23 UG/L

PQL

0.038

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-A-INFLUENT-336081721

08/17/2021 320-77803-1

R-EVE

0.81 UG/L

PQL

0.072

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-B-INFLUNET-336081721

08/17/2021 320-77803-7

Hydrolyzed PSDA

32 UG/L

PQL

0.038

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-B-INFLUNET-336081721

08/17/2021 320-77803-7

R-EVE

2.8 UG/L

PQL

0.072

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

SEEP-C-INFLUENT-336081721

08/17/2021 320-77803-3

Hydrolyzed PSDA

1.2 UG/L

PQL

0.038

J

Cl. Spec. Table 3
Compound SOP

PFAS_DI_Prep

Page 5 of 6

Site: Fayetteville
Validation Reason

Field Sample ID
SEEP-C-INFLUENT-336081721

Sampling Program: Seep Flow Through Cell Sampling 2021

Validation Options: LABSTATS

Uncertainty around the analysis of R-PSDA, Hydrolyzed PSDA and R-EVE; J-qualifier added to all detects in the data set, even if there was no matrix
spike analyzed for that particular sample.
Date
Sampled Lab Sample ID

Analyte08/17/2021 320-77803-3

R-EVE

Result Units Type0.80 UG/L

PQL

MDL

Validation
PQL Qualifier
0.072

J

Analytical
MethodCl. Spec. Table 3
Compound SOP

Pre-prep

Prep
PFAS_DI_Prep

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