February 27, 2019
Dr. Joe Ghiold, Ph.D., Project Manager
Facility Management Branch
Hazardous Waste Section
Division of Waste Management
NC Department of Environmental Quality
1646 Mail Service Center
Raleigh, NC 27699-1646
Re:

Creeks, Old Outfall 002 and Seeps Assessment Workplan
Chemours Fayetteville Works
Fayetteville, North Carolina
EPA ID No. NCD 047 368 642

Dear Dr. Ghiold:
Enclosed, please find a PDF copy of the Creeks, Old Outfall 002 and Seeps Assessment
Workplan for the Chemours Fayetteville Works. This document presents a field investigation toassess the presence of groundwater seeps and to measure the volumetric flow rates and per- andpolyfluoroalkyl substances (PFAS) concentrations of creeks and seeps at and near the Chemours
Fayetteville Works, North Carolina site that reach the Cape Fear River. Components of thisvoluntary sampling activity have already been conducted while other elements are pending based
access agreements and field conditions.
If you have any questions or need any additional information, please contact me at
Brian.D.Long@Chemours.com.
Respectfully submitted,

Brian D. Long
Plant Manager
Christel Compton – Chemours Fayetteville Works
File
Enclosurescc:Geosyntec Consultants of NC, PC
2501 Blue Ridge Road, Suite 430
Raleigh, NC 27607
PH 919.870.0576
FAX 919.870.0578
www.geosyntec.com

Creeks, Old Outfall 002 and Seeps Assessment Workplan
12 February 2019

INTRODUCTION AND OBJECTIVESThis workplan was prepared by Geosyntec Consultants of NC, P.C. (Geosyntec) for the Chemours
Company, FC, LLC (Chemours). This workplan describes a scope of work to be performed atWillis Creek, Georgia Branch Creek, Old Outfall 002 and three channels with flowing water fromseeps along the bluff face at the Chemours Fayetteville Works Site (the Site) (Figure 1). The
objectives of this scope of work are as follows:
1. Assess the base volumetric flow rate of seeps and creeks entering the Cape Fear River atand near the Site;
2. Assess gain in stream flow of the creeks and seeping water flow towards the Cape Fear
River;
3. Compare volumetric flow rate measurements from two independent flow measurement
methods (flow velocity gauging and salt dilution gauging);
4. Assess the per and polyfluoroalkyl substances (PFAS) concentrations in waters to obtain
more information on PFAS mass loading as it pertains to the Cape Fear River;
5. Assess water quality parameters in selected water samples to further inform the design ofpotential treatment options for PFAS; and6. Assess water temperatures near the stream bed in Willis Creek, Georgia Branch Creek,
Old Outfall 002, and the channels with flowing water from seeps for regions ofgroundwater upwelling.
SCOPE OF WORKThis scope of work involves three tasks: (i) collecting water samples for PFAS and other water
quality parameters, (ii) gauging seep/creek volumetric flow and (iii) assessing temperature
contrasts near the stream bed to aid in identification of areas of upwelling and observing stream
channel to visually identify areas of groundwater seepage. Methods for each task are describedlater in the Methods section. Table 1 and shown in Figures 2 through 6 show the locations of the
proposed work.

Creeks, Old Outfall 002 and Seeps Assessment Workplan
12 February 2019
Page 2All work will be performed according to the project health and safety plan (HASP) prepared by
Parsons (Parsons Health and Safety Plan Chemours Fayetteville Site, 2018). A POAD and Project
Safety Analysis (PSA) will be held prior to commencing field activities. All work will be
performed under Nationwide Permit 6 (USACE, 2017).
Sample locations indicated in this workplan are planned potential locations. The field team maycollect from different or additional locations depending on field conditions, in-person
observations, and accessibility considerations. Several of the planned sample locations will require
access permits as these locations are not on Chemours property. Work may not be completed if
access is not obtained.
At each location, the following tasks will be conducted in order: 1. Water quality parameter
assessment; 2. Water sample collection for laboratory analyses if specified in Table 1; and 3.
gauging and other physical flow measurements if specified in Table 1.
All salt dilution gauging work will maintain chloride concentrations below 230 milligrams per liter(mg/L); this is the United States Environmental Protection Agency (USEPA) acute freshwateraquatic life criteria and the North Carolina 15A NCAC 02B Water Quality Standards for Surface
Waters (USEPA, 2019; NCDEQ, 2019).
The work will be performed at the following creek/seep/river locations in the order shown below,
unless the field team changes the order of work in consultation with the Geosyntec project manager(Matt Vanderkooy) or for health and safety reasons the order of the work needs to be adjusted:
1.
2.
3.
4.
5.
6.
7.

Old Outfall 002
Georgia Branch Creek
Willis Creek
North Seeps
Center Seeps
South Seeps
Cape Fear River Upstream and Downstream

The remainder of this section describes the order and sequence of tasks to be implemented ateach of the creeks/seeps/river listed above.
Old Outfall 002
At Old Outfall 002, water samples for laboratory and field analysis will be collected, andvolumetric flow rates will be assessed at the Old Outfall 002 locations shown in Figure 2. Workwill start at location OLDOF-1 and progress sequentially upstream towards location OLDOF-5.

Creeks, Old Outfall 002 and Seeps Assessment Workplan
12 February 2019
Page 3
Some locations are individual locations, and some are grouped locations to assess flow andconcentrations where two streams meet: the main stream and a tributary. Tributaries are indicatedby the suffix “TR”. The groupings are as follows:
o
o
o
o
o

OLDOF-1 – individual
OLDOF-2 – individual
OLDOF-3 – individual
OLDOF-4, OLDOF-TR1-1 – grouped
OLDOF-5 – individual

At all locations, water samples for field and laboratory analysis will be collected first and thenthe salt dilution gauging will be performed.
At grouped locations, laboratory and field parameter samples will first be collected from thedownstream location and then the upstream location of Old Outfall 002 and then the tributary
location.
At grouped locations, the salt dilution gauging stock solution will be placed upstream of theconfluence of the stream and tributary. The solution will be metered at a sufficient distance
upstream such that the salt solution is fully mixed into the stream before the tributary joins (i.e.,such that electrical conductivity is stable ±10% across the stream cross section). This way boththe upstream and downstream locations of the confluence (e.g. OLDOF-3 and OLDOF-4) canboth be gauged using a single salt dilution gauging location.
Stream bottom temperatures will be recorded, and photographs taken using an infrared camera at
regular intervals along the length of the stream.
At location OLDOF-2, both salt dilution gauging and flow velocity gauging measurements will
be collected to assess and compare volumetric flow rates.
Georgia Branch Creek
At Georgia Branch Creek water samples for field and laboratory analysis will be collected, andvolumetric flow rates will be assessed at the Georgia Branch Creek locations shown in Figure 3
provided sampling and gauging locations are accessible.
Work will start at location GBC-1 and progress sequentially upstream towards location GBC-7. If
the field team accesses GBC-1 by foot, they should minimize any walking or disturbance in thecreek in order to minimize disruption to water and subsequent sample collection. Some locations

Creeks, Old Outfall 002 and Seeps Assessment Workplan
12 February 2019
Page 4are individual locations, and some are grouped locations to assess flow and concentrations where
two streams meet, the main stream and a tributary. Tributaries are indicated by the suffix “TR”.
The groupings are as follows:
o
o
o
o
o

GBC-1 – individual
GBC-2, GBC-3, GBC-TR-1 – grouped
GBC-4, GBC-5, GBC-TR-2 – grouped
GBC-6 – individual
GBC-7 – individual

At all locations water samples for laboratory and field analysis will be collected first and then thesalt dilution gauging will be performed.
At grouped locations, laboratory and field samples will first be collected from the downstream
location, then the upstream location of the Georgia Branch Creek, and finally the tributary
location. At grouped locations, the salt dilution gauging stock solution will be setup upstream of
the confluence of the stream and tributary. The solution will be metered at a sufficient distance
upstream such that the salt solution is fully mixed into the stream before the tributary joins (i.e.,such that electrical conductivity is stable ±10% across the stream cross section). This way boththe upstream and downstream locations of the confluence (e.g. GBC-2 and GBC-3) can both begauged using a single salt dilution gauging location.
Stream bottom temperatures will be recorded, and photographs taken using an infrared camera at
regular intervals along the length of the stream.
Willis Creek
At Willis Creek water samples for field and laboratory analysis will be collected, and volumetricflow rates will be assessed at the Willis Creek locations shown in Figure 4.
Work will start at location WC-1 and progress sequentially upstream towards location WC-5. All
locations are individual locations:
o
o
o
o
o

WC-1 – individualWC-2 – individualWC-3 – individualWC-4 – individualWC-5 – individualCreeks, Old Outfall 002 and Seeps Assessment Workplan
12 February 2019
Page 5
At each location, a water sample for field and laboratory analysis will be collected first and thenthe salt dilution gauging will be performed.
At Location WC-5, both salt dilution gauging and flow velocity gauging measurements will becollected to assess and compare volumetric flow rates.
The field team will inspect the Site side of Willis Creek (generally the south bank) for any seeps
or streams entering Willis Creek. The field team will collect a water sample for PFAS analysis
from any of these seeps or streams. The field team will also attempt to measure flow rates.
Stream bottom temperatures will be recorded, and photographs taken using an infrared camera at
regular intervals along the length of the stream.
Seeps
Work will be performed first at the North (Seep A), then the Center (Seep B), and last the South
seep areas (Seep C). The proposed locations for surface water sample collection and salt dilution
gauging are shown in Figure 5. At the three sections of the bluff slope with visible seepage water
the scope will be to collect water samples for field and laboratory analysis and volumetric flow
rates will be assessed at the mouth of each seep entering the Cape Fear River.
Water samples for laboratory analysis will be collected first, followed by volumetric flow rate
analysis. At the north and center, Seep A and Seep B, respectively, multiple sampling points will
be required. The field team may use their judgement in selecting these locations. Locations
identified in this plan are suggested locations. The objectives in selecting these locations should
include:o Locations before and after where two seeps meet;o Locations where underlying geology has / is soon to change; ando Locations where water is seeping into a stream.
For Seep C only one sampling point is required – closest to the river.
At all streams, work will start at where the seep/stream meets the Cape Fear River (Seep-C-1,
Seep-B-1, and Seep-A-1) and then progress upland. Seep/stream bottom temperatures will berecorded, and photographs taken using an infrared camera at regular intervals along the length of
the feature.

Creeks, Old Outfall 002 and Seeps Assessment Workplan
12 February 2019
Page 6
Cape Fear RiverAt the Cape Fear River, two sample locations have been identified, River Mile 76 upstream andRiver Mile 84 downstream (see Figure 6). The upstream sample will be collected first and thenthe downstream sample. The sampling location will be selected as follows: the thalweg (thedeepest point in the river) will be identified, then field parameters will be collected, then a sample
will be collected from middle depth. Sampling locations and depths will be recorded.
METHODSThis section describes the general field methods and specific procedures for collecting samples,
gauging stream flow and assessing stream bed temperatures.
General Field Procedures
All equipment will be inspected by the field program on-Site supervisor and calibrated at least
daily prior to use in the field according to the manufacturer’s recommended guidelines.
Calibration information will be recorded in a field logbook. Field parameters will be measured
with a water quality meter prior to sample collection and include the following:
•
•
•
•
•
•
•
•

pH;
Temperature (degrees Celsius; °C);
Specific conductance [SC] (micromhos, μmho);
Dissolved oxygen [DO] (mg/L);
Oxidation/Reduction Potential [ORP] (millivolts; mV);
Turbidity (nephelometric turbidity units, NTU);
Color; andOdor.

All sampling equipment will be decontaminated between sample locations in the following
manner:••••De-ionized water rinse;
Non-phosphate detergent wash (i.e., Alconox®);De-ionized water rinse; andAir dry.

Disposable equipment (e.g. gloves, tubing, etc.) will not be reused. New sample containers will
be used for each sample. At each proposed sampling location at least 6 sample bottles for PFAS
analysis will be collected with the intent that this will provide up to 3 sample bottles to archive forpotential future analyses.

Creeks, Old Outfall 002 and Seeps Assessment Workplan
12 February 2019
Page 7
Creek and Seep Water Sampling
Creek and seep water samples will be collected as grab samples. Sample bottles will be lowered
into the flowing water of the creek to collect the sample. The bottles will be lowered into the stream
either using a properly decontaminated dip rod with bottle attached with a nylon zip tie, or inshallow streams, by hand. The bottle will be lowered into the stream with the cap removed, open
and facing oncoming flow. Where possible, the sample will be collected from the middle of thestream. Care will be taken to avoid collecting suspended solids or other materials in the sample.
Samples will be collected into new 250 milliliters (mL) laboratory-supplied HDPE bottles. Water
quality parameters will be measured (pH, temperature, SC, DO, ORP) after sample collection using
water from the same location in the stream.
Cape Fear River Water Sampling
Cape Fear River water samples will be collected using a peristaltic pump and new dedicated HDPE
tubing and dedicated silicone tubing for the pump head at each location. The tubing will belowered to the specified sampling depth below the water surface using an anchor weight and thetubing fastened to the anchor pointing upwards. Surface water will be pumped directly from thesubmerged tubing through the pump head to a flow-through cell. Field parameters will bemonitored over a 5-minute interval, then the flow-through cell will be disconnected, the tubing cut
to provide a new, clean end and grab samples will be collected from the discharge of the peristaltic
pump in new 250 mL laboratory-supplied HDPE bottles.
Sample Packing and Shipping
Upon sample collection, each containerized sample will be labeled and placed as soon as possible
into an insulated sample cooler. The cooler will serve as a shipping container and will be provided
by the laboratory along with the appropriate sample containers. Wet ice will be placed around thesample containers within heavy-duty plastic bags within the sample cooler. Samples will bemaintained at a cool temperature (optimum 4°Celsius ± 2°Celsius) from the time of collection until
the coolers arrive at the laboratory (if required). Plastic “bubble wrap” and/or polystyrene foam
may also be used to protect the samples during shipping.
Prior to shipment of the samples to the laboratory, a chain-of-custody form will be completed by
the field sample custodian. Sample locations, sample identification numbers, description ofsamples, number of samples collected, and specific laboratory analyses to be run on each sample
will be recorded on the chain-of-custody form.

Creeks, Old Outfall 002 and Seeps Assessment Workplan
12 February 2019
Page 8Upwelling Assessment via Temperature Assessment
Areas of groundwater upwelling into surface water bodies can be assessed using temperature
differentials of groundwater versus surface water. Groundwater temperatures usually reflect themean annual temperature of a location. For example, at the Fayetteville Works Site groundwatertemperatures are usually near 20°Celsius year-round while surface water temperatures are close toseasonal average temperature. Therefore, surface water temperatures will be closer to 10°C in
winter and closer to 30°C in summer. Additionally the field team will inspect the channels thecreeks follow for evidence of seeping groundwater which then enters the creek / seep channel.
Submersible Temperature Probe
Areas of upwelling can be identified by placing a submersible temperature probe in the bottom of
the stream and recording the temperature. If the temperature is similar to surface watertemperatures, then the stream is not in a zone of upwelling. But, if the stream bottom temperatures
are different than surface water (warmer if work is conducted in winter, colder if conducted insummer) the stream is likely in a zone of upwelling. Stream bed temperatures will be measured by
a combination of inserting the probe into the bottom of the creek bed and by having the probe
present just above the creek bottom.
Infrared Camera
Infrared cameras can also be used to identify stream bottom locations where groundwater isupwelling. The cameras are used to take photographs of the stream. Areas with temperature
differentials, namely where the stream bottom is warmer than the surface water may be indicative
areas of upwelling. An infrared camera will be used to assess the suitability of this method for
identifying areas of upwelling in the creeks. Photographs of the creeks will be taken with an
infrared camera to identify areas of upwelling groundwater based on temperature differences.
Flow Velocity Gauging
Where streams pass through structures with regular geometries, i.e. through culverts, the flow rateof the stream can be measured using a submersible flow meter. The flow meter is placed beneaththe flowing stream along the cross section of the stream at regular intervals (e.g. every six inches)
and the height of the water is recorded along with the recorded water velocity. These measurements
are then used to calculate the volumetric flow of water passing through the structure based on theregular geometry and measured flow rates.

Creeks, Old Outfall 002 and Seeps Assessment Workplan
12 February 2019
Page 9
Salt Dilution Streamflow Gauging
The flow of streams can be measured by dosing at a constant flow rate into the stream a solution
with a known concentration of a tracer compound, in this case sodium chloride – salt (Moore,
2004). Using a Mariotte bottle or constant flow pump, the salt solution with a known concentration
is dosed into the flowing stream at a known flow rate. The metered salt solution then mixes withthe stream flow. The concentration of salt in the stock solution and in the stream can be measured
using a conductivity probe reporting the result in units of microsiemens per centimeter (µS/cm).
Using the known flow rate of the stock solution and the known concentrations of the stream andstock solution, the flow rate of the stream can be calculated. Salt is a suitable tracer since it can beeasily and accurately measured in the field and it can be used at concentrations that do not impact
aquatic life. Both the USEPA acute freshwater aquatic life criteria and the North Carolina 15A
NCAC 02B Water Quality Standards for Surface Waters is 230 mg/L of chloride, or 373 mg/L ofsalt (USEPA, 2019; NCDEQ, 2019). Therefore, the flow rate metering of the stock solution should
be set such that the mixed concentration in streams should not exceed this value.
Implementation Steps
•

•

•
•
•

•

Select gauging location. Select a location along the stream suitable for the measurements.
Ideally flow of the stream will be focused in a moving channel (moving water helps
increase mixing of the stock solution), and there will be a suitable location to place thestock solution.
Calibrate conductivity probe. Calibrate the conductivity probe using the provided
calibration solutions and test against 4 previously prepared solutions of known salt
concentration.
Record background stream conductivity. Record background stream conductivity andcollect a sample.
Prepare stock solution. Stock solution can be prepared by mixing water from the stream
with previously prepared sodium chloride brine solutions of known concentrations.
Begin dosing stream with stock solution. Set the stock solution on a stable platform(potentially a board spanning the stream) and begin metering the stock solution into thestream. Record three measurements of flow rate into the stream using a stopwatch and acontainer with accurate gradations – i.e. a graduated cylinder.
Measure stock solution and stream concentrations. Using the conductivity probe, measure
the conductivity of the stock solution and then the stream. Progress the measurement
locations far enough downstream such that measurements recorded across the stream allprovide the same value indicating complete mixing. Collect a sample of the stock
solution and the dosed, well-mixed stream (10-mL sample is enough).

Creeks, Old Outfall 002 and Seeps Assessment Workplan
12 February 2019
Page 10•

Record final stock solution flow rate. Assess the uniformity of stock solution addition
during the gauging event by measuring the stock solution flow rate after sample
collection.

LABORATORY ANALYSES
Collected samples will be analyzed by up to three laboratory methods to assess PFAS presence
and concentrations as specified in Table 1. The methods to be applied are:•••

EPA Method 537 Mod;EPA Method 8321 Mod; andTable 3 Lab SOP.

Analyte lists for each method are provided in Table 2. Samples will be shipped to either
TestAmerica Sacramento, TestAmerica Denver or Lancaster Laboratories depending on laboratory
availability at the time of sampling. Samples will be shipped on the same day as sample collection
to meet the hold time for nitrate analysis (48 hours).
Samples will also be collected for the analyses listed below at the selected locations specified inTable 1:
•
•
•
•
•
•
•
•

Total Dissolved Solids (TDS); Method SM 2540 C-1997
Total Suspended Solids (TSS); Method SM 2540 D-1997
Cation / Anion Balance; Methods EPA 200.7, EPA 300.0, and SM 2320 B-1997
Total Organic Carbon (TOC); Method SM 5310 C-2000
Iron (Field Analyses)
Priority Pollutant List (PPL) Metals; Method SW-846 6010C/7470A
PPL Volatile Organic Compounds (VOCs); Method SW-846 8260C
PPL Semi-Volatile Organic Compounds (SVOCs); Method SW-846 8270D

Field QA/QC Samples
The following field QA/QC samples will be collected:••••

A minimum of a daily blind duplicate sample, or at a frequency of 1 per 20 samples;
A minimum of a daily matrix spike and replicate sample, or at a frequency of 1 per 20
samples;A daily field blank sample; andA daily rinsate sample when any HDPE tubing and peristaltic pump equipment are used tocollect the sample.

Creeks, Old Outfall 002 and Seeps Assessment Workplan
12 February 2019
Page 11
FIELD NOTES AND DATA REPORTING
The project field team will keep a daily diary of field activities and note sample collection times,
measured field parameters, and other recorded field data or observations. All field collected data
will be furnished to the project team within 10 business days of the conclusion of the field event.
REFERENCES
Moore, R.D., 2004. Introduction to salt dilution gauging for streamflow measurement: Part
1. Streamline Watershed Management Bulletin, 7(4), pp.20-23.
NCDEQ, 2019. NC_StdsTable_09222017; North Carolina 15A NCAC 02B Water Quality
Standards for Surface Waters. https://deq.nc.gov/nc-stdstable-09222017. Accessed 27 January
2019.
Parsons, 2018. Health and Safety Plan Chemours Fayetteville Site.
United States Army Corps of Engineers. Nationwide Permit 6. 19 March 2017. http://sawreg.usace.army.mil/NWP2017/2017NWP06.pdf. Accessed 30 January 2019.
USEPA, 2019. National Recommended Water Quality Criteria - Aquatic Life Criteria Table.
https://www.epa.gov/wqc/national-recommended-water-quality-criteria-aquatic-life-criteriatable. Accessed 27 January 2019.
****
Enclosures:
Table 1: Sampling and Gauging Locations
Table 2: Analytical Methods and Analyte List
Figure 1: Site Map
Figure 2: Old Outfall Locations
Figure 3: Georgia Branch Locations
Figure 4: Willis Creek Locations
Figure 5: Small Streams Locations
Figure 6: Cape Fear River Locations

TABLESTABLE 1
Sampling and Gauging Locations
Chemours Fayetteville Works, North Carolina
Analytical Method
Location Name

Sample Name

Water Body

Suggested
Sequence

PFAS Sample
Bottles

EPA 537

EPA 8321

Table 3Iron (Field
Analysis)Other Analytical
1

PPL Analytical 2

Salt Dilution
Gauging

Flow Velocity
Gauging

Temperature
Survey

GBC-1
GBC-2
GBC-3
GBC-TR1-1
GBC-4
GBC-5
GBC-TR2-1
GBC-6
GBC-7

FAY-SW-GBC-1-MMDDYY
FAY-SW-GBC-2-MMDDYY
FAY-SW-GBC-3-MMDDYY
FAY-SW-GBC-TR1-1-MMDDYY
FAY-SW-GBC-4-MMDDYY
FAY-SW-GBC-5-MMDDYY
FAY-SW-GBC-TR2-1-MMDDYY
FAY-SW-GBC-6-MMDDYY
FAY-SW-GBC-7-MMDDYY

Georgia Branch Creek
Georgia Branch Creek
Georgia Branch Creek
GBC Tributary
Georgia Branch Creek
Georgia Branch Creek
GBC Tributary
Georgia Branch Creek
Georgia Branch Creek

1
2
3
4
5
6
7
8
9

6
6
6
6
6
6
6
6
6

Y
---------

Y
Y
Y
Y
Y
Y
Y
Y
Y

Y
Y
Y
Y
Y
Y
Y
Y
Y

Y
Y
Y
Y
Y
Y
Y
Y
Y

Y
Y
Y
Y
Y
Y
Y
Y
Y

----------

Y
Y
Y
Y
Y
Y
Y
Y
Y

----------

Y

WC-1
WC-2
WC-3
WC-4
WC-5

FAY-SW-WC-1-MMDDYY
FAY-SW-WC-2-MMDDYY
FAY-SW-WC-3-MMDDYY
FAY-SW-WC-4-MMDDYY
FAY-SW-WC-5-MMDDYY

Willis Creek
Willis Creek
Willis Creek
Willis Creek
Willis Creek

1
2
3
4
5

6
6
6
6
6

Y
-----

Y
Y
Y
Y
Y

Y
Y
Y
Y
Y

Y
Y
Y
Y
Y

Y
Y
Y
Y
Y

------

Y
Y
Y
Y
Y

----Y

Y

OLDOF-1
OLDOF-2
OLDOF-3
OLDOF-4
OLDOF-TR1-1
OLDOF-5

FAY-SW-OLDOF-1-MMDDYY
FAY-SW-OLDOF-2-MMDDYY
FAY-SW-OLDOF-3-MMDDYY
FAY-SW-OLDOF-4-MMDDYY
FAY-SW-OLDOF-TR1-1-MMDDYY
FAY-SW-OLDOF-5-MMDDYYOld Outfall 002
Old Outfall 002
Old Outfall 002
Old Outfall 002
Old Outfall Tributary
Old Outfall 002

1
2
3
4
5
6

6
6
6
6
6
6

Y
------

Y
Y
Y
Y
Y
Y

Y
Y
Y
Y
Y
Y

Y
Y
Y
Y
Y
Y

Y
Y
Y
Y
Y
Y

-------

Y
Y
Y
Y
Y
Y

-Y
-----

Y

Seep-C-1

FAY-SW-Seep-C-1-MMDDYY

Seeps South

1

6

Y

Y

Y

Y

Y

Y

Y

--

Y

Seep-B-1
Seep-B-2
Seep-B-3
Seep-B-4

FAY-SW-Seep-B-1-MMDDYY
FAY-SW-Seep-B-2-MMDDYY
FAY-SW-Seep-B-3-MMDDYY
FAY-SW-Seep-B-4-MMDDYY

Seeps Center
Seeps Center
Seeps Center
Seeps Center

1
2
3
4

6
6
6
6

Y
----

Y
Y
Y
Y

Y
Y
Y
Y

Y
Y
Y
Y

Y
Y
Y
Y

Y
--Y

Y
Y
Y
Y

-----

Y

Seep-A-1
Seep-A-2
Seep-A-3
Seep-A-4
Seep-A-5
Seep-A-6
Seep-A-7
Seep-A-8
Seep-A-9
Seep-A-10
Seep-A-11

FAY-SW-Seep-A-1-MMDDYY
FAY-SW-Seep-A-2-MMDDYY
FAY-SW-Seep-A-3-MMDDYY
FAY-SW-Seep-A-4-MMDDYY
FAY-SW-Seep-A-5-MMDDYY
FAY-SW-Seep-A-6-MMDDYY
FAY-SW-Seep-A-7-MMDDYY
FAY-SW-Seep-A-8-MMDDYY
FAY-SW-Seep-A-9-MMDDYY
FAY-SW-Seep-A-10-MMDDYY
FAY-SW-Seep-A-11-MMDDYY

Seeps North
Seeps North
Seeps North
Seeps North
Seeps North
Seeps North
Seeps North
Seeps North
Seeps North
Seeps North
Seeps North

1
2
2
2
2
2
2
2
2
2
2

6
6
6
6
6
6
6
6
6
6
6

Y
-----------

Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y

Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y

Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y

Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y

Y
---------Y

Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y

------------Y

CFR-RM-76
CFR-RM-84

FAY-SW-CFR-RM-76-MMDDYY
FAY-SW-CFR-RM-84-MMDDYY

Cape Fear River
Cape Fear River

1
2

6
6

Y
Y

Y
Y

Y
Y

Y
Y

Y
Y

---

---

---

Y

46

46

10

Field Duplicates
MS/MS-Rep
Rinsate1 in 20
1 in 20
Daily as Appropriate (i.e. during Cape Fear River sampling)

Field Blank
Estimated Total

Daily
390

13

46

46

February 2019
Page 1 of 2

TABLE 1
Sampling and Gauging Locations
Chemours Fayetteville Works, North Carolina
Notes
1 - Other analytical methods:
TDS
TSS
Cations (Calcium, Magnesium, Sodium, Potassium, Iron, Ammonia, Manganese,
Aluminum)Anions (Chloride, Sulfate, Alkalinity, Phosphate, Nitrate)
TOC
2 - PPL analytical methods:
PPL Metals
PPL VOCs
PPL SVOCs

Acronyms
CFR - Cape Fear River
EPA - Environmental Protection Agency
GBC - Georgia Branch Creek
MS - matrix spike
OLDOF - Old Outfall 002
PFAS - per and polyfluoroalkyl substances
PPL - Priority Pollutant List
SVOC - semi-volatile organic compounds
TDS - total dissolved solids
TOC - total organic carbon
TR - tributary
TSS - totals suspended solids
VOC - volatile organic compounds
WC - Willis Creek
Y - yes

February 2019
Page 2 of 2

TABLE 2
Analytical Methods and Analyte List
Chemours Fayetteville Works, North Carolina
Compound
Group

Name

Perfluorobutanoic acid
Perfluoropentanoic acid
Perfluorohexanoic acid
Perfluoroheptanoic acid
Perfluorooctanoic acid
Perfluoroalkyl Perfluorononanoic acidcarboxylic acids Perfluorodecanoic acid
(PFCAs)
Perfluoroundecanoic acid
Perfluorododecanoic acid
Perfluorotridecanoic acid
Perfluorotetradecanoic acid
Perfluorohexadecanoic acid
Perfluorooctadecanoic acid
Perfluorobutanesulfonic acid
Perfluoropentanesulfonic acid
Perfluorohexanesulfonic acid
Perfluoroalkyl
Perfluoroheptanesulfonic acidsulfonic acids
Perfluorooctanesulfonic acid(PFSAs)
Perfluorononanesulfonic acid
Perfluorodecanesulfonic acid
Perfluorododecanesulfonate
4:2 fluorotelomersulfonate
6:2 fluorotelomersulfonate
8:2 fluorotelomersulfonate
10:2-fluorotelomersulfonate
N-ethyl perfluorooctane sulfonamidoacetic acidN-ethyl heptadecafluoro octanesulfonamidN-ethyl-N-(2-hydroxyethyl)perfluorooctylsulphonamide
Other
N-methyl perfluorooctane sulfonamidoacetic acidheptadecafluoro-N-methyloctanesulphonamide
N-methylperfluorooctanesulfonamidoethanol
Perfluorooctanesulfonamide
Ammonium 4,8-dioxa-3H-perfluorononanoate
chlorododecafluorohexyloxyl tetrafluoroethanesulfonic acidchlorohexadecafluoroctyloxyl tetrafluoroethanesulfonic acid

Abbreviation
PFBA
PFPeA
PFHxA
PFHpA
PFOA
PFNA
PFDA
PFUnA
PFDoA
PFTriA
PFTeA
PFHxDA
PFODA
PFBS
PFPeS
PFHxS
PFHpS
PFOS
PFNS
PFDS
PFDoS
4:2 FTS
6:2 FTS
8:2 FTS
10:2 FTS
NEtFOSAA
NEtPFOSANEtPFOSAE
NMeFOSAA
NMePFOSA
NMePFOSAE
PFOSA
ADONA
F-53B Major
F-53B Minor

Carbon
Atoms
4
5
6
7
8
9
10
11
12
13
14
15
16
4
5
6
7
8
9
10
11
6
8
10
12
12
10
12
11
9
11
8
7
10
8

CAS
Number375-22-4
2706-90-3
307-24-4
375-85-9
335-67-1
375-95-1
335-76-2
2058-94-8
307-55-1
72629-94-8
376-06-7
67905-19-5
16517-11-6
375-73-5
2706-91-4
355-46-4
375-92-8
1763-23-1
474511-07-4
335-77-3
79780-39-5
757124-72-4
27619-97-2
39108-34-4
120226-60-0
2991-50-6
4151-50-2
1691-99-2
2355-31-931506-32-8
24448-09-7
754-91-6
958445-44-8
73606-19-6
83329-89-9

Laboratory

MethodTestAmerica
Sacramento

EPA 537
PFAS
Compounds

February 2019
Page 1 of 2

TABLE 2
Analytical Methods and Analyte List
Chemours Fayetteville Works, North Carolina
Compound
Group
Other

Name
Hexafluoropropylene oxide dimer acid

Perfluoro-1-methoxyacetic acid
Perfluoro(3,5-dioxahexanoic) acid
Perfluoro(3,5,7-trioxaoctanoic) acid
Perfluoroalkyl
Perfluoro(3,5,7,9-tetraoxadecanoic) acidether carboxylic
Perfluoro(3,5,7,9,11-pentaoxatridecanoic) acidacids (PFECAs)
Perfluoro-3-methoxypropanoic acid
Perfluoro-4-methoxybutanoic acid
Perfluoroether alkyl carbonic acid – G
Nafion Byproduct #1, Perfluoro-3,6-dioxa-4-methyl-7-octene-1Perfluoroalkyl sulfonic acidether sulfonic Nafion Byproduct #2, 2-[1-[difluoro(1,2,2,2-tetra
acids (PFESAs) fluoroethoxy)methyl]-1,2,2,2-tetrafluoroethoxy]-1,1,2,2tetrafluoro-Ethanesulfanoic acid

Abbreviation

Carbon
Atoms

CAS
NumberLaboratory

Method

HFPO-DA6

13252-13-6

TestAmerica
Denver

EPA 8321 ModPFMOAAPFO2HxAPFO3OAPFO4DAPFO5DAPMPAPEPAPFECA-G

3
4
5
6
7
4
5
7

674-13-539492-88-1
39492-89-2
39492-90-5
39492-91-6
13140-29-9863090-89-5
801212-59-9

TestAmerica
Sacramento

Table 3
Lab SOPPFESA BP 1

729311-67-8

PFESA BP 2

7749836-20-2

Acronyms
HDPE - high density polyethylene
PFAS - per- and polyfluoroalkly substances
SOP - standard operating procedure

February 2019
Page 2 of 2

FIGURES

Willis Creek Mouth
Site River Water Intake
LTW-01
LTW-02
LTW-03
LTW-04
Outfall 002
LTW-05

W.O. Huske Dam

Old Outfall Channel Mouth
Cape FearRiver

Path: E:\TR0726\Site_Locations_2019\SiteFeatures_TR0726.mxd; JK; 01/31/2019

Georgia Branch Creek Mouth

0.25

LegendLTW - Long Term Well

Drainage Network

Site Feature

Site Boundary

0.125

0

0.25 Miles

Site Map
Cape Fear River

Chemours Fayetteville Works, North Carolina

Nearby Tributary
Observed Seep

FigureNotes:
Basemap Sources: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID,
IGN, and the GIS User Community

Raleigh'FCSVBSy 20191

Outfall 002
LTW-05

OLDOF-5

W.O. Huske Dam

OLDOF-4
OLDOF-TR1-1

OLDOF-2

OLDOF-1

Author: TIp
Last Revised: 1/31/2019
Path: E:\TR0726\Site_Locations_2019\TR0726_OldOutfallGauging.mxd

OLDOF-3

LegendOld Outfall Channel Mouth

500
LTW - Long Term Well

Drainage Network

Site Feature

Site Boundary

Sampling and Gauging Location
Cape Fear River250

0500 Feet

Old Outfall Locations
Chemours Fayetteville Works, North Carolina

Nearby Tributary

FigureObserved Seep
Notes:
Outfall 002 is via enclosed pipe.
Basemap Sources: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID,
IGN, and the GIS User Community
Projection: NAD 1983 StatePlane North Carolina FIPS 3200 Feet; Units in Foot US

Raleigh'FCSVBSZ 20192

Outfall 002
LTW-05
W.O. Huske Dam

Old Outfall Channel Mouth

GBC-7

GBC-6

GBC-TR2-1

GBC-5

GBC-1

Georgia Branch Creek Mouth

GBC-4

Path: E:\TR0726\Site_Locations_2019\TR0726_GeorgiaBranch.mxd

Last Revised: 1/31/2019

Author: TIp

GBC-3 GBC-2
GBC-TR1-1

Legend1,600
LTW - Long Term Well800

01,600 Feet

Site Boundary

Sampling and Gauging Location
Site Feature
Cape Fear River

Georgia Branch Locations
Chemours Fayetteville Works, North Carolina

Nearby Tributary

FigureObserved Seep
Drainage Network
Basemap Sources: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID,
IGN, and the GIS User Community
Projection: NAD 1983 StatePlane North Carolina FIPS 3200 Feet; Units in Foot US

Raleigh'FCSVBSZ 2019

3

WC-5

Cape Fear River

WC-3
WC-4

WC-2

WC-1

Path: E:\TR0726\Site_Locations_2019\TR0726_WillisCreek.mxd

Last Revised: 1/31/2019

Author: TIp

Willis Creek Mouth

500

Legend250

Sampling and Gauging Location

0500 Feet

Site River Water Intake

Site Feature
Cape Fear River

Willis Creek Locations

Nearby Tributary

Chemours Fayetteville Works, North Carolina

Site Boundary

FigureBasemap Sources: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID,
IGN, and the GIS User Community
Projection: NAD 1983 StatePlane North Carolina FIPS 3200 Feet; Units in Foot US

Raleigh'FCSVBSZ 20194

Willis Creek Mouth

Site River Water Intake

LTW-01

Seep-A-3

Seep-A-11

LTW-02

Seep-A-10

Seep-A-4
Seep-A-7

Seep-A-9

Seep-A-1
Seep-A-2
Seep-A-5
Seep-A-6
Seep-A-8
LTW-03Seep-B-1
Seep-B-2
Seep-B-4

Seep-B-3

LTW-04

Outfall 002
LTW-05Seep-C-1

Additional Flow Gauging

Path: E:\TR0726\Site_Locations_2019\TR0726_SmallStream.mxd

Last Revised: 1/31/2019

Author: TIp

W.O. Huske Dam

440

LegendLTW - Long Term Well

220

0

440 Feet

Site Boundary

Sampling and Gauging Location
Site Feature
Cape Fear River

Small Streams Locations
Chemours Fayetteville Works, North Carolina

Nearby Tributary

FigureObserved Seep
Drainage Network
Basemap Sources: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA,
USGS, AeroGRID, IGN, and the GIS User Community
Projection: NAD 1983 StatePlane North Carolina FIPS 3200 Feet; Units in Foot US

Raleigh'FCSVBSZ 20195

CFR-RM-76
Willis Creek Mouth
Site River Water Intake
LTW-01
LTW-02
LTW-03
LTW-04
Outfall 002
LTW-05
W.O. Huske Dam
Old Outfall Channel Mouth

Georgia Branch Creek Mouth

ar
Fe
pe
Ca
r
ve
Ri

Path: E:\TR0726\Site_Locations_2019\TR0726_CapeFearRiver.mxd; JK; 01/31/2019

CFR-RM-84

1

LegendLTW - Long Term Well

0.5

0

1 Miles

Site Boundary

6DPSOLQJ Location

Cape Fear River Locations

Site Feature
Cape Fear River

Chemours Fayetteville Works, North Carolina

Nearby Tributary
Observed Seep

FigureDrainage Network
Notes:
Basemap Sources: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID,
IGN, and the GIS User Community

Raleigh'FCSVBSZ 20196