NC0003573_Renewal Applicaiton Addendum_20201130

Chemours
RECEIVED
NOV 3 0 2020
NCDEQIDWRINFDES
Chemours Fayetteville Works
NPDES Permit Application Update
7.
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November 2020

(,� The Chemours Company
Chemours- Fayetteville Works
22828 NC Highway 87 W
Fayetteville,NC 28306
November 24, 2020
Julie Grzyb, Supervisor RECEIVED
NCDEQ Division of Water Resources NPDES Unit NOV 3 0 2020
1617 Mail Service Center NCDEQ/DWR/NPDES
Raleigh,North Carolina 27699-1679
julie.grzyb(@mcdenr.gov
Re: Chemours Fayetteville Works NPDES NC003573 Permit Application
Update
Dear Ms. Grzyb:
The Chemours Company — Fayetteville Works is providing an addendum to the National
Pollutant Discharge Elimination System(NPDES)permit application submitted to the North
Carolina Department of Environmental Quality on November 5, 2019.
Some key points of the NPDES permit application addendum are the following:
• A Chemours site tenant, Kuraray, is in the process of making major modifications to
its manufacturing operations that will reduce flow and organic load to the site's
wastewater treatment system. This is causing Chemours to modify its wastewater
treatment system to accommodate the reduced flow and organic load. In addition,
there will also be a reduction in noncontact cooling water flows of approximately 2.7
million gallons per day.
• Chemours has installed reverse osmosis (RO), granular activated carbon and ion
exchange (RO Process) to produce demineralized water for manufacturing
operations. The water source of this wastewater is manufacturing operations process
waters. This process may, at times, produce RO Permeate which will not meet the
specifications for reuse in manufacturing operations. Chemours is proposing that
discharge which doesn't meet these specifications be discharged to the site's
wastewater treatment system, in accordance with the NPDES permit discharge
specifications for PFAS compounds between Chemours and your agency. PFAS
effluent data from this system are included.
In addition to the enclosed NPDES permit application addendum,a listing of the contents of
the application and a general description of the enclosed permit application addendum are
attached. The description identifies the new information and the revisions to the NPDES
permit application that was submitted on November 5, 2019.

Julie Grzyb
November 24, 2020
Page 2
If you have any questions or need additional information, please contact Christel Compton
at(910) 678-1213.
Sincerely,
g40,,Axd,
Brian D. Long
Plant Manager
Chemours—Fayetteville Works

Chemours Fayetteville Works
NPDES Permit Application Update
November 2020

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Chemours
Chemours Fayetteville Works
NPDES Permit Application Update
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November 2020

CHEMOURS NPDES PERMIT APPLICATION MODIFICATION 11-24-2020
Attachment B - Existing Outfalls
1. Attachment B—Form 2C Outfall 001
Anticipated future flows have been revised based on changes in Kuraray manufacturing operations
(decreased flows), increased flow from DuPont, and Chemours' proposed new flows.The new Chemours'
flows reflect diversion of stormwater, reductions in process/sanitary wastewater, reductions in
noncontact cooling water and the addition of recycling process wastewater with treatment through
reverse osmosis(RO).The future conditions are detailed in "Attachment B-2 Section 3.Average Flows and
Treatment(40 CFR 122.21(G)(3) Outfall Number 001".
Permit application modification
• Section 3.1 Operations Contributing to Flow— now includes "Attachment J for Reverse Osmosis
Process Unit"
• Section 3.1 Treatment Units — now includes "Description of Reverse Osmosis Treatment is in
Attachment J"
• Section 11 Additional Information—changes "thru attachment I" to "thru attachment J" which is
the new Reverse Osmosis Treatment section
• Page 9— Modified footnote to Outfall 001 flow: "The flows in Row 6 are from Dec. 2017 to May
2019. Anticipated future flows are based on Kuraray changes manufacturing operations and
Chemours proposed new flows which can be found in Attachment B-2 Outfall Average Flows and
Treatment".
• Note: The mass loadings values in Table A. Conventional and Non Conventional Pollutants,Table
B. Toxic Metals, Cyanide, Total Phenols, and Organic Toxic Pollutants, and Table C. Certain
Conventional and Non Conventional Pollutants continue to be based on historic flows.
2. Attachment B—Form 2C Outfall 002
In the original NPDES permit application, the Outfall 002 analytical result for mercury (Hg) was 51 parts
per trillion (ppt)with a detection limit of 50 ppt.Chemours was uncertain of the accuracy of this analytical
result and collected four additional intake and Outfall 002 samples using a more sensitive analytical
method. These four analytical results showed the mercury concentration in the Chemours'intake to range
from 2.25 to 6.25 ppt and outfall effluent concentrations to be in the range of 3.84 to 5.87 ppt.
Permit application modification and additions
• Page 11- Updated the Hg data set for the intake and effluent
• Added Attachment B-12, (see below) summarizing all Hg data
• In Attachment B-7, updated the list of laboratories to include Pace Analytical (in Mount Juliet,
TN) who performed the low-level Hg analysis
• Note:The mass loadings values in Table A. Conventional and Non Conventional Pollutants,Table
B.Toxic Metals, Cyanide,Total Phenols, and Organic Toxic Pollutants, and Table C. Certain
Conventional and Non Conventional Pollutants continue to be based on historic flows.
2

CHEMOURS NPDES PERMIT APPLICATION MODIFICATION 11-24-2020
3. Attachment B.1 —Line Drawing Water Balance
The Water Balance Line drawing was updated to reflect new flow volumes to the wastewater treatment
plant(Outfall 001). Specific modifications to the line drawing are:
• A portion of stormwater from the PFAS process secondary containment Ion Exchange Membrane
Area (IXM)/FPS to the wastewater treatment plant is being trucked off site for disposal. This
reduced the stormwater flow to the wastewater treatment plant from 49,589 gallons per day
(gpd)to 25,000 gpd.
• Sanitary wastewater has been reduced to 20,000 gpd.
• The Demineralized Water System and Air Compressor Cooling Water have been combined for a
total flow of 50,000 gpd.
• Flow from Kuraray Trosifol® will be reduced due to a change in manufacturing operations. Flow
to the wastewater treatment will be reduced from 280,000 gpd to 25,000 gpd and noncontact
cooling water will be reduced by approximately 2.7 MGD
• The Chemours proposed RO Permeate system water may, at times, discharge to the wastewater
treatment plant if demineralized water specifications cannot be met. This flow is anticipated to
range from zero to 28,000 gpd.
• Future DuPont Polyvinyl Fluoride manufacturing flow to the wastewater treatment plant is
expected to increase from 118,173 gpd to 136,000 gpd.
• The 400 gpd from the shower was eliminated as it is de minimis.
Permit application modifications
• Updated Attachment B.1 "Form 2C Section 2: Line Drawing Water Balance"to reflect the above
change in flows.
• Attachment B-1-1 "Form 2C Section 2: Line Drawing—Option 1 Water Balance" is deleted due to
the issuance of NPDES permit NC0089915 for Outfall 003 (Old Outfall 002).
4. Attachment 8.2 Outfall 001 Average Flows and Treatment
The expected flow to Outfall 001 has changed and Attachment B.2 was updated accordingly. The changes
include decreased flow from Kuraray Trosifol® manufacturing, increased flow from Dupont, and the
addition of Chemours Reverse Osmosis Permeate. Additionally, a portion of the stormwater collected in
the secondary containment in the IXM and Monomers area is no longer be sent to the WWTP and
discharged through Outfall 001. These changes are also shown in "Attachment B.1 —Line Drawing Water
Balance".
5. Attachment 8.3 Outfall 002 Average Flows and Treatment
Incorporates revised Outfall 001 estimated effluent long-term average flow into Outfall 002 estimated
long-term average flow. Also adjusted down by^'2.7 MGD due to the reduction in noncontact cooling
use by Kura ray.
6. Attachment 8.3.1 Option 1 Section 3. Average Flows and Treatment(40 CFR 122.21(G)(3))
Outfall 002
Eliminated due to DEQ issuing NPDES permit NC0089915.
3

CHEMOURS NPDES PERMIT APPLICATION MODIFICATION 11-24-2020
7. Attachment 8.4 Stormwater Runoff Estimation
Permit application modification
• The stormwater flows to Outfall 001 have been revised to reflect that untreated stormwater
from the IXM/FPS area no longer discharges to the wastewater treatment plant. Note;
Chemours is requesting RO Permeate to be discharged to the wastewater treatment plant which
may contain IXM/Monomers secondary containment stormwater.
8. Attachment 8.5.1 Future Biological Wastewater Treatment Facility Management
As noted, Kuraray has changed its manufacturing operations which has significantly reduced flow and
organic load to the wastewater treatment plant.
Permit application modification and addition
• Attachment B-5"Current Facility Wastewater Management"from the November 2019 application
was updated to include Attachment B.5.1. This attachment incorporates the proposed
wastewater treatment plant modifications.
• A new Attachment B.11 "Wastewater Management & Treatment System: Engineering Report &
Basis of Design for Phase I Modifications" is included (see below).
9. Attachment 8.7 Analytical Laboratories
Permit application modifications
• Incorporated Pace Analytical's Mount Juliet,TN address and phone number. Pace Lab performed
the low-level Hg analysis discussed in item#2 above and the per- and polyfluoroalkyl substances
(PFAS),volatile organic chemical, and metals analyses for the RO permeate.
• Incorporated TBL Environmental's Lumberton, NC address and phone number.TBL performed the
BOD5analysis for the RO permeate.
10.Attachment 8.11 Wastewater Management& Treatment System: Engineering Report&
Basis of Design for Phase I Modifications Report "NEW"
Kuraray (a Chemours tenant) has revised its manufacturing operations from a wet process to a dry
process. This change will reduce the overall volume of wastewater and organic loading to the wastewater
treatment plant and requires Chemours to make some modifications to the biological wastewater
treatment plant. As noted previously the wastewater flow will be reduced from range of 280,000 gpd —
357,000 gpd to 25,000 gpd.
Permit application modification
• Included a new attachment B.11 "Wastewater Management & Treatment System: Engineering
Report & Basis of Design for Phase I Modifications" to describe the modifications to the site's
wastewater treatment plant.
4

CHEMOURS NPDES PERMIT APPLICATION MODIFICATION 11-24-2020
11.Attachment B.12 Table B. Toxic Metals, Cyanide, Total Phenols, and Organic Toxic
Yg
a c
Pollutants(40 CFR 122.21(G)(7)(V))
Chemours collected additional samples for low-level mercury analysis in June and July of 2020, as there
was only one sample (0.51 µg/L) provided with the November 2019 application for Outfall 002. Results
show that this sample was an outlier.The average of the low-level mercury results is 0.00471 µg/L.
Permit application modification
• Added a new attachment B.12 "Table B. Toxic Metals, Cyanide,Total Phenols, and Organic Toxic
Pollutants (40 CFR 122.21(G)(7)(V))"
Attachment C—Thermal Oxidizer
12. Thermal Oxidizer
Chemours requests that the thermal oxidizer 2D NPDES permit application be put on hold until further
notice.
Attachment D — Old Outfall 002
This attachment is no longer relevant.A NPDES permit was issued for this discharge (NC0089915, Outfall
003), effective September 30, 2020.
Attachment F — Compounds and Potential Compounds in Intake and Outfalls
13.Attachment F.12 Matrix Interference During Analysis of Table 3+ Compounds
This addendum documents the matrix interference observed during the analysis of Table 3+ PFAS by
analytical methods for Table 3+PFAS(Table 3 Methods).The memorandum provides evidence that MMF,
DFSA, R-PSDA (formerly BP4), Hydrolyzed PSDA (formerly BP5) and REVE should no longer be included in
the Table 3 Method because they are unreliably quantitated by the Table 3 Method.
14.Attachment F.12 Matrix Interference During Analysis of Table 6 Compounds
This addendum documents the matrix interference observed during the analysis of Table 6 PFAS by
analytical methods for Table 6 PFAS (Table 6 Methods). Based on the data quality issues presented in this
memorandum for MMF, DFSA, MTP and PPF Acid, analysis and reporting of these compounds is not
recommended.
Attachment J — Reverse Osmosis System Wastewater "New"
Chemours has implemented a process system to treat process wastewater for reuse in manufacturing
operations. The IXM/Monomers RO process system consists of a two-pass RO, GAC, and Mixed Bed Ion
Exchange.The system will remove dissolved PFAS compounds and total dissolved solids from the process
water currently collected in the Process Effluent Facility Storage Tanks. The goal of the RO system is to
produce recycled water that will meet the site specifications for demineralized water for use in the various
5

CHEMOURS NPDES PERMIT APPLICATION MODIFICATION 11-24-2020
production units in the Chemours IXM/Monomers. The RO reject will be trucked off site for disposal. RO
permeate water that meets demineralized water specifications will be reused in manufacturing
operations. Treated water that does not meet these specifications is proposed to be discharged to the
wastewater treatment plant. New attachments to the NPDES permit application are noted below.
15.Attachment J.1 RO PERMEATE—2 D Form
16.Attachment J.2 RO Permeate Engineering Report and Data Analysis
17.Attachment J.2.1 RO Permeate Engineering Report-Safety Data Sheets
18.Attachment J.4 Engineering Alternatives Analysis—Reverse Osmosis Permeate Discharge
6

RECEIVED
NOV 3 0 2020
NCDEQIDWRINPDES
Attachment B — Form 2C Outfall 001

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works OMB No.2040-0004
Form U.S.Environmental Protection Agency
2C — EPA Application for NPDES Permit to Discharge Wastewater
NPDES EXISTING MANUFACTURING,COMMERCIAL,MINING,AND SILVICULTURE OPERATIONS
SECTION 1.OUTFALL LOCATION(40 CFR 122.21(g)(1))
1.1 Provide information on each of the facility's outfalls in the table below.
o Number Receiving Water Name Latitude Longitude
a
U
001 Cape Fear River 34° 50' 22.91" N 78° 50' 11.47" W
io
002 Cape Fear River 34° 50' 18.00" N 78° 49' 43.07" W
0
, „ ° , „
SECTION 2.LINE DRAWING(40 CFR 122.21(g)(2))
co 2.1 Have you attached a line drawing to this application that shows the water flow through your facility with a water
CD .3 balance?(See instructions for drawing requirements.See Exhibit 2C-1 at end of instructions for example.)
J R
o ✓❑ Yes ❑ No See attachment B.1
SECTION 3.AVERAGE FLOWS AND TREATMENT(40 CFR 122.21(g)(3))
3.1 For each outfall identified under Item 1.1,provide average flow and treatment information.Add additional sheets if
necessary.
**Outfall Number** 001
Operations Contributing to Flow
Operation Average Flow
SEE ATTACHMENT B.2,B.4,B.5 mgd
c
See Attachment C for Thermal Oxidizer mgd
TO
See Attachment J for Reverse Osmosis Process Unit mgd
v
c
3 mgd
0
a:
a, Description Final Disposal of Solid or
d (include size,flow rate through each treatment unit, Code from Liquid Wastes Other Than
a' retention time,etc.) Table 2C-1 by Discharge
SEE ATTACHMENT B.2,B.5,B.6
Description of Thermal oxidizer WWTP is also in Attch.C
Description of Reverse Osmosis Treatment is in Attch.J
EPA Form 3510-2C(Revised 3-19) Page 1

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works OMB No.2040-0004
3.1 **Outfall Number** 002
cont. Operations Contributing to Flow
Operation Average Flow
SEE ATTACHMENT B.3,B.4,B.5 mgd
mgd
mgd
mgd
Treatment Units
Description Code from Final Disposal of Solid or
(include size,flow rate through each treatment unit, Table 2C-1 Liquid Wastes Other Than
retention time,etc.) by Discharge
-0i SEE ATTACHMENT B.3,B.5,B.6
c
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ea
N
**Outfall Number**
y Operations Contributing to Flow
Operation Average Flow
U-
mgd
mgd
mgd
mgd
Treatment Units
Description Final Disposal of Solid or
Code from
(include size,flow rate through each treatment unit, Liquid Wastes Other Than
Table -1
abe C
retention time,etc.) by Discharge
e
3.2 Are you applying for an NPDES permit to operate a privately owned treatment works?
E ✓❑ Yes ❑ No 4 SKIP to Section 4.
rn 3.3 Have you attached a list that identifies each user of the treatment works?
❑✓ Yes ❑ No
EPA Form 3510-2C(Revised 3-19) Page 2

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works OMB No.2040-0004
SECTION 4. INTERMITTENT FLOWS(40 CFR 122.21(g)(4))
4.1 Except for storm runoff, leaks,or spills,are any discharges described in Sections 1 and 3 intermittent or seasonal?
❑ Yes ❑✓ No 4 SKIP to Section 5.
4.2 Provide information on intermittent or seasonal flows for each applicable outfall.Attach additional pages, if necessary.
Outfall Operation Frequency Flow Rate
Number (list) Average Average Long-Term Maximum Duration
Days/Week Months/Year Average Daily
days/week months/year mgd mgd days
days/week months/year mgd mgd days
days/week months/year mgd mgd days
£ days/week months/year mgd mgd days
days/week months/year mgd mgd days
days/week months/year mgd mgd days
days/week months/year mgd mgd days
days/week months/year mgd mgd days
days/week months/year mgd mgd days
SECTION 5. PRODUCTION(40 CFR 122.21(g)(5))
5.1 Do any effluent limitation guidelines(ELGs)promulgated by EPA under Section 304 of the CWA apply to your facility?
❑� Yes ❑ No 4 SKIP to Section 6.
u 5.2 Provide the following information on applicable ELGs.
ELG Category ELG Subcategory Regulatory Citation
d
OCPSF Direct Discharge Point Sources Subpart D 40 CFR 414 Subpart D
c>
0.
0
5.3 Are any of the applicable ELGs expressed in terms of production(or other measure of operation)?
❑ Yes 11 No 4 SKIP to Section 6.
0
5.4 Provide an actual measure of daily production expressed in terms and units of applicable ELGs.
Outfall Operation,Product,or Material Quantity per Day Unit of
Number Measure
i0
O
a
EPA Form 3510-2C(Revised 3-19) Page 3

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works OMB No.2040-0004
SECTIOW 6. IMPROVEMENTS(40 CFR 122.21(g)(6))
6.1 Are you presently required by any federal,state,or local authority to meet an implementation schedule for constructing,
upgrading,or operating wastewater treatment equipment or practices or any other environmental programs that could
affect the discharges described in this application?
ElYes ❑ No 4 SKIP to Item 6.3.
6.2 Briefly identify each applicable project in the table below.
Affected Final Compliance Dates
Brief Identification and Description of Outfalls Source(s)of
Project (list outfall Discharge Required Projected
a. number)
E
V
co
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N
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N
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6.3 Have you attached sheets describing any additional water pollution control programs(or other environmental projects
that may affect your discharges)that you now have underway or planned?(optional item)
❑✓ Yes See Attachment I ❑ No ❑ Not applicable
SECTI0117.EFFLUENT AND INTAKE CHARACTERISTICS(40 CFR 122.21(g)(7))
See the instructions to determine the pollutants and parameters you are required to monitor and, in turn,the tables you must
complete. Not all applicants need to complete each table.
Table A.Conventional and Non-Conventional Pollutants
7.1 Are you requesting a waiver from your NPDES permitting authority for one or more of the Table A pollutants for any of
your outfalls?
❑ Yes ❑� No 4 SKIP to Item 7.3.
7.2 If yes, indicate the applicable outfalls below.Attach waiver request and other required information to the application.
Outfall Number Outfall Number Outfall Number
0 7.3 Have you completed monitoring for all Table A pollutants at each of your outfalls for which a waiver has not been
y requested and attached the results to this application package?
CI Yes ❑ No;a waiver has been requested from my NPDES
V permitting authority for all pollutants at all outfalls.
Table B.Toxic Metals,Cyanide,Total Phenols,and Organic Toxic Pollutants
R 7.4 Do any of the facility's processes that contribute wastewater fall into one or more of the primary industry categories
listed in Exhibit 2C-3?(See end of instructions for exhibit.)
✓0 Yes ❑ No 4 SKIP to Item 7.8.
7.5 Have you checked"Testing Required"for all toxic metals,cyanide, and total phenols in Section 1 of Table B?
❑✓w
Yes El No
7.6 List the applicable primary industry categories and check the boxes indicating the required GC/MS fraction(s)identified
in Exhibit 2C-3.
Primary Industry Category Required GCIMS Fraction(s)
(Check applicable boxes.)
Organic chemicals manufacturing 0 Volatile 0 Acid 0 Base/Neutral 0 Pesticide
❑Volatile 0 Acid ❑ Base/Neutral 0 Pesticide
0 Volatile 0 Acid 0 Base/Neutral 0 Pesticide
EPA Form 3510-2C(Revised 3-19) Page 4

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works OMB No.2040-0004
7.7 Have you checked"Testing Required"for all required pollutants in Sections 2 through 5 of Table B for each of the
GC/MS fractions checked in Item 7.6?
❑✓ Yes ❑ No
7.8 Have you checked"Believed Present"or"Believed Absent"for all pollutants listed in Sections 1 through 5 of Table B
where testing is not required?
❑ Yes ❑✓ No
7.9 Have you provided(1)quantitative data for those Section 1,Table B,pollutants for which you have indicated testing is
required or(2)quantitative data or other required information for those Section 1,Table B,pollutants that you have
indicated are"Believed Present"in your discharge?
✓❑ Yes ❑ No
7.10 Does the applicant qualify for a small business exemption under the criteria specified in the instructions?
❑ Yes 4 Note that you qualify at the top of Table B, ❑ No
d then SKIP to Item 7.12.
7.11 Have you provided(1)quantitative data for those Sections 2 through 5,Table B, pollutants for which you have
c determined testing is required or(2)quantitative data or an explanation for those Sections 2 through 5,Table B,
pollutants you have indicated are"Believed Present"in your discharge?
✓❑H Yes ❑ No
w Table C.Certain Conventional and Non-Conventional Pollutants
4,2 7.12 Have you indicated whether pollutants are"Believed Present"or"Believed Absent"for all pollutants listed on Table C
for all outfalls?
U
Y
❑✓ Yes El No
▪ 7.13 Have you completed Table C by providing(1)quantitative data for those pollutants that are limited either directly or
indirectly in an ELG and/or(2)quantitative data or an explanation for those pollutants for which you have indicated
"Believed Present"?
❑✓ Yes ❑ No
W Table D.Certain Hazardous Substances and Asbestos
7.14 Have you indicated whether pollutants are"Believed Present"or"Believed Absent"for all pollutants listed in Table D for
all outfalls?
✓❑ Yes ❑ No
7.15 Have you completed Table D by(1)describing the reasons the applicable pollutants are expected to be discharged
and(2)by providing quantitative data,if available?
❑✓ Yes ❑ No
Table E.2,3,7,8-Tetrachlorodibenzo-p-Dioxin(2,3,7,8-TCDD)
7.16 Does the facility use or manufacture one or more of the 2,3,7,8-TCDD congeners listed in the instructions,or do you
know or have reason to believe that TCDD is or may be present in the effluent?
❑ Yes 4 Complete Table E. ❑✓ No -4 SKIP to Section 8.
7.17 Have you completed Table E by reporting qualitative data for TCDD?
❑✓ Yes ❑ No
SECTION 8.USED OR MANUFACTURED TOXICS(40 CFR 122.21(g)(9))
8.1 Is any pollutant listed in Table B a substance or a component of a substance used or manufactured at your facility as
an intermediate or final product or byproduct?
❑ Yes ❑ No 4 SKIP to Section 9.
u 8.2 List the pollutants below.
co 0 1. Antimony 4. Methylene chloride 7.
0
2. Benzene 5. Toluene 8.
3. 1,2-dichloroethane 6. 9.
EPA Form 3510-2C(Revised 3-19) Page 5

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works OMB No.2040-0004
.ECTION 9. BIOLOGICAL TOXICITY TESTS(40 CFR 122.21(g)(11))
9.1 Do you have any knowledge or reason to believe that any biological test for acute or chronic toxicity has been made
within the last three years on(1)any of your discharges or(2)on a receiving water in relation to your discharge?
❑✓ Yes ❑ No 4 SKIP to Section 10.
9.2 Identify the tests and their Durposes below.
Test(s) Purpose of Test(s) Submitted to NPDES Date Submitted
o Permitting Authority?
NC Chronic Effluent Whole Effluent Toxicity ✓❑ Yes El No 06/06/2019
BioassayProcedureperformed quarterly
9 Y
0
o Results of WET testing
co submitted with DMRs ❑ Yes ❑ No
❑ Yes ❑ No
.ECTION 10.CONTRACT ANALYSES(40 CFR 122.21(g)(12))
10.1 Were any of the analyses reported in Section 7 performed by a contract laboratory or consulting firm?
❑✓ Yes ❑ No 4 SKIP to Section 11.
10.2 Provide information for each contract laboratory or consulting firm below.
Laboratory Number 1 Laboratory Number 2 Laboratory Number 3
Name of laboratory/firm See Attachment B.7
Laboratory address
Phone number
U
Pollutant(s)analyzed
SECTION 11.ADDITIONAL INFORMATION(40 CFR 122.21(g)(13))
11.1 Has the NPDES permitting authority requested additional information?
✓❑ Yes ❑ No 4 SKIP to Section 12.
E 11.2 List the information requested and attach it to this application.
1. See attachment F 4
0
2. 5.
3. 6.
EPA Form 3510-2C(Revised 3-19) Page 6

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works OMB No.2040-0004
SECTION 12.CHECKLIST AND CERTIFICATION STATEMENT(40 CFR 122.22(a)and(d))
12.1 In Column 1 below,mark the sections of Form 2C that you have completed and are submitting with your application.
For each section,specify in Column 2 any attachments that you are enclosing to alert the permitting authority.Note
that not all applicants are required to complete all sections or provide attachments.
Column 1 Column 2
✓❑ Section 1: Outfall Location ❑ wl attachments
❑✓ Section 2:Line Drawing ❑✓ wl line drawing ❑✓ w/additional attachments
wl list of each user of
Section 3:Average Flows and wl
❑ Treatment ❑ attachments I:] privately owned treatment
works
❑ Section 4: Intermittent Flows 0 w/attachments
❑ Section 5:Production ❑ w/attachments
wl optional additional
0Section 6: Improvements 0w/attachments sheets describing any
additional pollution control
plans
❑
w/request for a waiver and ❑ w/explanation for identical
supporting information outfalls
w/small business exemptionEl 'r•�'I t�oa ra
s
aJ ❑ request seehattachmhent I-
ca Section 7: Effluent and Intake
"' Characteristics 0w/Table A ❑✓ w/Table B
c 'I0
❑✓ w/Table C ❑✓ w/Table D
CU
❑✓ w/Table E w/analytical results as an
0 attachment Fti
_
c Section 8:Used or Manufactured
❑ Toxics ❑ w/attachments
Vn Section 9:Biological Toxicity
0 Tests E] w/attachments
s
0
❑✓ Section 10:Contract Analyses ✓❑ wl attachments See attachment B.7
✓❑ Section 11:Additional Information ❑✓ w/attachments See attachment C thru attachment J
Section 12: Checklist and
✓❑ Certification Statement El wl attachments
12.2 Certification Statement
I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in
accordance with a system designed to assure that qualified personnel properly gather and evaluate the information
submitted. Based on my inquiry of the person or persons who manage the system,or those persons directly
responsible for gathering the information, the information submitted is, to the best of my knowledge and belief,true,
accurate,and complete. I am aware that there are significant penalties for submitting false information,including the
possibility of fine and imprisonment for knowing violations.
Name(print or type fir)and last name) �J Official title
BRIAN D.LONG xe//,/V ,/ / 4�� PLANT MANAGER
Signature �/' Date signed
Ltd4Aly 0'. 7A3)/(4A
EPA Form 3510-2C(Revised 3-19) Page 7

This page intentionally left blank.

ientification Number NPDES Permit Number Facilil Outfall Number Form E d 03/05/19
wLD 047 368 642 NC0003573 Chemours Fayetteville Works 001 or 2040-0004
TABLE A.CONVENTIONAL AND NON CONVENTIONAL POLLUTANTS(40 CFR 122.21(g)(7)(iii))'
Effluent Intake
Waiver (Optional)
sted Units Maximum Maximum Long-Term
Pollutant Reque
f applicable) (specify) Daily Monthly Average Daily Number of Long-Term Number of
Discharge Discharge Discharge Analyses Average Value Analyses
(required) (if available) (if available)
❑ Check here if you have applied to your NPDES permitting authority for a waiver for all of the pollutants listed on this table for the noted outfall.
Biochemical oxygen demand Concentration mg/L 40.3 15.1 4.2 229 See Outfall 002
1' El(BODS)
Mass lb/day 129.5 49.0 16.9 229
Chemical oxygen demand Concentration mg/L 26.8 1
2. ❑
(COD)
Mass b/day 115 1
Concentration mg/L 6.1 1
3. Total organic carbon(TOC) ❑
Mass b/day 26 1
Concentration mg/L 50.5 13.5 6.0 232
4. Total suspended solids(TSS) ❑
Mass lb/day 218.6 56.1 25.9 232
Concentration mg/L 0.54 1
5. Ammonia(as N) ❑
Mass b/day 2.3 1
6. Flow2 ❑ Rate MGD 1.425 0.688 0.534 537
Temperature(winter) ❑ °C °C 23.0 21.2 19.3 78
7.
Temperature(summer) ❑ °C °C 31.0 30.0 29.4 40
pH(minimum) ❑ Standard units S.U. 6.68 n/a n/a 232
8. -
pH(maximum) ❑ Standard units s.u. 8.42 n/a n/a 232
ampring snail De conauctea according to surricleiitly sensitive test pfoceaures(l.e., metnoas)apOrovea unaer 4U Ul--c lib Tor me analysis or pollutants oT pollutant parameters
or required under 40 CFR chapter I, subchapter N or 0. See instructions and 40 CFR 122.21(e)(3).
2 The flows in Row 6 are from Dec.2017 to May 2019. Anticipated future flows are based on Kuraray changes manufacturing operations and Chemours proposed new flows
which can be found in Attachment B-2 Outfall Average Flows and Treatment.
EPA Form 3510-2C(Revised 3-19) Page 9

This page intentionally left blank.

m riiN identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 001 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence
(check one) Effluent Intake
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
Discharge Discharge Daily of Average of
(required) (if available) Dischar(ifavailable)ge Analyses Value Analyses
❑ Check here if you qualify as a small business per the instructions to Form 2C and,therefore,do not need to submit quantitative data for any of the organic toxic pollutants in Sections
2 through 5 of this table. Note, however,that you must still indicate in the appropriate column of this table if you believe any of the pollutants listed are present in your discharge.
Section 1.Toxic Metals,Cyanide,and Total Phenols
Antimony,total ❑ ❑ 0 Concentration mg/L <0.00041 1
1.1 (7440-36-0) Mass lb/day <0.0018 1
Arsenic,total ❑ 0
0 Concentration mg/L <0.00068 1
1.2 (7440-38-2) Mass lb/day <0.0029 1
Beryllium,total El El Concentration mg/L <0.000091 1
1.3 (7440-41-7) ✓ Mass lb/day <0.00039 1
Cadmium,total Concentration mg/L <0.00015 1
1.4 (7440-43-9) ❑ 0 Mass lb/day <0.00064 1
Chromium, total Concentration mg/L <0.01 <0.01 <0.006 2
1.5 ✓
(7440-47-3) Mass lb/day <0.04 <0.04 <0.026 2
Copper,total ❑ 0 0 Concentration mg/L <0.01 <0.01 <0.01 2
1.6 (7440-50-8) Mass lb/day <0.042 <0.042 <0.041 2
Lead,total ❑ 0 ❑ Concentration mg/L <0.0011 1
1.7 (7439-92-1) Mass lb/day <0.0047 1
Mercury,total ❑ El ❑ Concentration mg/L <0.000050 1
1.8 (7439-97-6) Mass lb/day <0.00021 1
Nickel, total ❑ El ❑ Concentration mg/L <0.01 <0.01 <0.007 2
1'9 (7440-02-0) Mass lb/day <0.04 <0.04 <0.029 2
Selenium,total ❑ ❑ ❑ Concentration mg/L <0.00065 1
1.10 (7782-49-2) Mass lb/day <0.0028 1
Silver,total ❑ 0 0 Concentration mg/L <0.00017 1
1.11 (7440-22-4) Mass lb/day <0.00073 1
EPA Form 3510-2C(Revised 3-19) Page 11

_.,..dentification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 001 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))l
Presence or Absence
(check one) Effluent Intake
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Long-
MonthlyAverage Number Term Number
Present Absent Daily
Discharge Discharge Daily of Average of
(required) (if available) Discharge Analyses Analyses
Value
(if available)
Thallium,total ❑ Concentration mg/L <0.00011 1
1.12 (7440-28-0) Mass lb/day <0.00047 1
1.13 Zinc, total Concentration mg/L 0.0541 0.0541 0.043 2
El 0 El
(7440-66-6) Mass lb/day 0.231 0.231 0.18 2
Cyanide, total 0 Concentration mg/L <0.0050 1
1.14 (57 12 5) Mass lb/day <0.021 1
1.15 Phenols,total 0 ❑ Concentration mg/L <0.010 1
Mass lb/day <0.043 1
Section 2.Organic Toxic Pollutants(GCIMS Fraction-Volatile Compounds)
21 Acrolein Concentration ug/L <1.00 1
El 0(107-02-8) Mass lb/day <0.00428 1
Acrylonitrile o Concentration ug/L <0.20 1
2.2 El El
(107-13-1) Mass lb/day <0.00086 1
Benzene ❑ Concentration ug/L <0.050 1
2.3 El 0
(71-43-2) Mass lb/day <0.00021 1
Bromoform 0 Concentration ug/L <0.10 1
2.4 El El
(75-25-2) Mass lb/day <0.00043 1
Carbon tetrachloride ❑ Concentration ug/L <0.10 1
2.5 El El
(56-23-5) Mass lb/day <0.00043 1
Chlorobenzene 0 Concentration ug/L <0.10 1
2.6 (108-90-7) Mass lb/day <0.00043 1
Chlorodibromomethane ❑ Concentration ug/L <0.10 1
2.7 (124-48-1) Mass lb/day <0.00043 1
Chloroethane 0 Concentration ug/L <0.10 1
2.8 (75-00-3) Mass lb/day <0.00043 1
EPA Form 3510-2C(Revised 3-19) Page 12

crm identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
i NCD 047 368 642 NC0003573 Chemours Fayetteville Works 001 OMB No.2040-0004
i
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence Intake
(check one) Effluent (optional)
Pollutant]Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (speciy) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Daily of Term of
Discharge Discharge Discharge Analyses Average Analyses
(required) (if available) (if available) Value
2.9 2-chloroethylvinyl ether ❑ 0 0 Concentration ug/L <0.050 1
(110-75-8) Mass lb/day <0.00021 1
Concentration ug/L <0.10 1
2.10 Chloroform(67-66-3) 0 ❑ ❑
Mass lb/day <0.00043 1
2.11 Dichlorobromomethane El 0 0 Concentration ug/L <0.20 1 1
(75-27-4) Mass Ib/day <0.00086 1
1,1-dichloroethane ❑ ❑ 0 Concentration ug/L <0.1 1 1
2.12 (75-34-3) Mass Ib/day <0.0004 1
2.13 12-dichloroethane ❑ 0 0 Concentration ug/L <0.20 1 1
(107-06-2) Mass lb/day <0.00086 1
1,1-dichloroethylene El ❑ ❑ Concentration ug/L <0.2 1 1
2.14 (75-35-4) Mass lb/day <0.0009 1
1,2-dichloropropane El ❑ 0 Concentration ug/L <0.20 1 1
2.15 (78-87-5) Mass lb/day <0.00086 1
1,3-dichloropropylene ❑ 0 0 Concentration ug/L <0.080 1 1
2.16 (542-75-6) Mass lb/day <0.00034 1
Ethylbenzene El ❑ 0 Concentration ug/L <0.10 1 1
2.17 (100-41-4) Mass lb/day <0.00043 1
Methyl bromide El ❑ 0 Concentration ug/L <0.10 1 1
2.18 (74-83-9) Mass lb/day <0.00043 1
Methyl chloride El 0
0 Concentration ug/L <0.30 1 1
2.19 (74-87-3) Mass lb/day <0.0013 1
Methylene chloride El 0
0 Concentration ug/L <0.30 1 1
2.20 (75-09-2) Mass lb/day <0.0013 1
1,1,2,2-tetrachloroethane ❑ 0
0 Concentration ug/L <0.050 1 1
2.21 (79-34-5) Mass lb/day <0.00021 1
EPA Form 3510-2C(Revised 3-19) Page 13

�,„,dentification Number NPDES Permit Number • Facility ivame Outfall Number Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 001 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence Intake
(check one) Effluent
(optional)
PollutantlParameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (speci Maximum Maximum Long
h) Average Number Number
Present Absent Daily Monthly Term
Discharge Discharge Daily of Average of
(required) (if available) Discharge Analyses Analyses
Value
(if available)
Tetrachloroethylene ❑ Concentration ug/L <0.20 1
2.22 (127-18-4) Mass lb/day <0.00086 1
2.23 Toluene Concentration ug/L <0.050 1
(108-88-3) Mass lb/day <0.00021 1
1,2-trans-dichloroethylene Concentration ug/L <0.10 1
2.24 (156-60-5) Mass lb/day <0.00043 1
2.25 1,1,1-trichloroethane Concentration ug/L <0.1 1
(71-55-6) Mass lb/day <0.0004 1
1,1,2-trichloroethane Concentration ug/L <0.2 1
2.26 (79-00-5) Mass lb/day <0.0009 1
Trichloroethylene Concentration ug/L <0.20 1
2.27 (79-01-6) Mass lb/day <0.00086 1
Vinyl chloride ID
ug/L <0.30 1
2.28 El
(75-01-4) Mass lb/day <0.0013 1
Section 3.Organic Toxic Pollutants(GCIMS Fraction-Acid Compounds)
2-chlorophenol Concentration ug/L <0.2 1
3.1 El El
(95-57-8) ✓ Mass lb/day <0.0009 1
2,4-dichlorophenol Concentration ug/L <0.09 1
3.2 (120-83-2) Mass lb/day <0.0004 1
2,4-dimethylphenol Concentration ug/L <0.2 1
3.3 (105-67-9) Mass lb/day <0.0009 1
4,6-dinitro-o-cresol Concentration ug/L <0.9 1
3.4 (534-52-1) 0 Mass lb/day <0.004 1
2,4-dinitrophenol Concentration ug/L <0.9 1
3.5 (51-28-5) Mass lb/day <0.004 1
EPA Form 3510-2C(Revised 3-19) Page 14

_,..,.ientification Number NPDES Permit Number Facility,.a,,,e Outfall Number Form ANN.,,,,A 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works ow. OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence Intake
(check one) Effluent (optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Daily of Term of
Discharge Discharge Discharge Analyses Average Analyses
(required) (if available) (if available) Value
2-nitrophenol 0 Concentration ug/L <0.3 1
3.6 (88 75 5) Mass lb/day <0.001 1
4-nitrophenol 0 Concentration ug/L <0.8 1
3.7 (100-02-7) Mass lb/day <0.003 1
p-chloro-m-cresol 0 Concentration ug/L <0.3 1
3.8 (59-50-7) Mass lb/day <0.001 1
Pentachlorophenol 0 Concentration ug/L <0.7 1
3'9 El El
(87-86-5) Mass lb/day <0.003 <0.003 1
3.10 Phenol O Concentration ug/L <0.4 1
CI 0
(108-95-2) Mass lb/day <0.002 1
2,4,6-trichlorophenol Concentration ug/L <0.2 1
3.11 ( CI 0 CI
88 05 2) Mass lb/day <0.0009 1
Section 4.Organic Toxic Pollutants(GC/MS Fraction-Base/Neutral Compounds)
Acenaphthene Concentration ug/L <0.08 1
4.1 (83 32 9) Mass lb/day <0.0003 1
Acenaphthylene Concentration ug/L <0.07 1
4.2 (208-96-8) Mass lb/day <0.0003 1
Anthracene 0 Concentration ug/L <0.07 1
4.3 CI 0
(120-12-7) Mass lb/day <0.0003 1
Benzidine Concentration ug/L <6 1
4.4 (92-87-5) Mass lb/day <0.03 1
4.5 Benzo(a)anthracene Concentration ug/L <0.2 1
(56-55-3) Mass lb/day <0.0009 1
4.6 Benzo(a)pyrene a Concentration ug/L <0.2 1
0 CI
(50-32-8) Mass lb/day <0.0009 1
EPA Form 3510-2C(Revised 3-19) Page 15

zr„identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 001 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence
(check one) Effluent Intake
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
Daily
Discharge Discharge Discharge Analyses Average Analyses
(required) (if available) (if available) Value
3,4-benzofluoranthene Concentration ug/L <0.07 1
4.7 (205-99-2) El 0 Mass lb/day <0.0003 1
4.8 Benzo(ghi)perylene 0 ❑ Concentration ug/L <0.09 1
(191-24-2) Mass lb/day <0.0004 1
Benzo(k)fluoranthene Concentration ug/L <0.09 1
4.9 (207-08-9) Mass lb/day <0.0004 1
Bis(2-chloroethoxy)methane ❑ Concentration ug/L <0.2 1
4.10 (111-91-1) Mass lb/day <0.0009 1
Bis(2-chloroethyl)ether 0 Concentration ug/L <0.09 1
4.11 (111-44-4) Mass lb/day <0.0004 1
4.12 Bis(2-chloroisopropyl)ether El0 Concentration ug/L <0.09 1
(102-80-1) Mass lb/day <0.0004 1
4.13 Bis(2-ethylhexyl)phthalate 0 0 Concentration ug/L 8 1
(117-81-7) Mass lb/day 0.03 1
4.14 4-bromophenyl phenyl ether El ❑ Concentration ug/L <0.2 1
(101-55-3) Mass lb/day <0.0009 1
Butyl benzyl phthalate 0 Concentration ug/L <0.09 1
4.15 El ID
(85-68-7) Mass Ib/day <0.0004 1
2-chloronaphthalene ❑ Concentration ug/L <0.6 1
4.16 El 0
(91-58-7) Mass Ib/day <0.003 1
4.17 4-chlorophenyl phenyl ether 0 0 Concentration ug/L <0.8 1
El
(7005-72-3) Mass lb/day <0.003 1
4.18 Chrysene 0 Concentration ug/L <0.2 1
(218-01-9) Mass lb/day <0.0009 1
Dibenzo(a,h)anthracene ❑ ❑ Concentration ug/L <0.09 1
4.19 El
(53-70-3) Mass lb/day <0.0004 1
EPA Form 3510-2C(Revised 3-19) Page 16

,..ientification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 001 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence
(check one) Effluent Intake
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Long-
(and ( p �) DailyMonthlyAverage Number Term Number
Present Absent
Discharge Discharge Daily of Average of
(required) (if available) Discharge Analyses Analyses
Value
(if available)
4.20 1,2-dichlorobenzene 0 Concentration ug/L <0.2 1
(95-50-1) Mass lb/day <0.0009 1
1,3-dichlorobenzene 0 Concentration ug/L <0.09 1
4.21 El El
(541-73-1) Mass Ib/day <0.0004 1
1,4-dichlorobenzene 0 Concentration ug/L <0.2 1
4.22 El 0
(106-46-7) Mass lb/day <0.0009 1
4.23 3,3-dichlorobenzidine a Concentration ug/L <0.09 1
El
(91-94-1) Mass lb/day <0.0004 1
Diethyl phthalate Concentration ug/L <0.3 1
4.24 El ElEl
(84-66-2) Mass Ib/day <0.001 1
Dimethyl phthalate Concentration ug/L <0.5 1
4.25 El ElEl
(131-11-3) Mass lb/day <0.002 1
Di-n-butyl phthalate 0 Concentration ug/L <0.9 1
4.26 El El
(84 74 2) Mass Ib/day <0.004 1
2,4-dinitrotoluene Concentration ug/L <0.09 1
4.27 El ElEl
(121-14-2) Mass Ib/day <0.0004 1
4.28 2,6-dinitrotoluene Concentration ug/L <0.2 1
El ElEl
(606-20-2) Mass lb/day <0.0009 1
4 29 Di-n-octyl phthalate Concentration ug/L <0.5 1
(117-84-0) Mass lb/day <0.002 1
4.30 1,2-Diphenylhydrazine a � Concentration ug/L <0.09 1
(as azobenzene)(122-66-7) Mass lb/day <0.0004 1
Fluoranthene Concentration ug/L <0.2 1
4.31 1:1 ElEl
(206-44-0) Mass lb/day <0.0009 1
Fluorene Concentration ug/L <0.08 1
4.32 El ElEl
(86-73-7) Mass lb/day <0.0003 1
EPA Form 3510-2C(Revised 3-19) Page 17

t 1-',1 identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 001 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence Intake
(check one) Effluent
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
of of
Discharge Discharge Discharge Analyses Average Analyses
(required) (if available) (if available) Value
Hexachlorobenzene ❑ 0 Concentration ug/L <1 <1 <0.8 2
4.33 (118-74-1) Mass lb/day <0.006 <0.006 <0.004 2
Hexachlorobutadiene Concentration ug/L <0.2 1
4.34 0
(87 68 3) Mass lb/day <0.0009 1
4.35 Hexachlorocyclopentadiene 0 � Concentration ug/L <0.2 1
(77-47-4) Mass lb/day <0.0009 1
Hexachloroethane Concentration ug/L <0.09 1
4.36 El 00
(67-72-1) Mass lb/day <0.0004 1
4.37 Indeno(1,2,3-cd)pyrene 0 Concentration ug/L <0.07 1
(193-39-5) Mass lb/day <0.0003 1
Isophorone Concentration ug/L <0.2 1
4.38 (78 59 1) Mass lb/day <0.0009 1
Naphthalene 0 Concentration ug/L <0.09 1
4.39 El El
(91 20 3) Mass lb/day <0.0004 1
Nitrobenzene Concentration ug/L <0.2 1
4.40 El 0El
(98-95-3) Mass Ib/day <0.0009 1
N-nitrosodimethylamine 0 Concentration ug/L <0.4 1
4.41 El El
(62-75-9) Mass lb/day <0.002 1
N-nitrosodi-n-propylamine 0 Concentration ug/L <0.2 1
4.42 (621-64-7) Mass lb/day <0.0009 1
N-nitrosodiphenylamine 0 0 Concentration ug/L <0.09 1
4.43 (86-30-6) Mass lb/day <0.0004 1
Phenanthrene Concentration ug/L <0.09 1
4.44 El 0(85-01-8) Mass lb/day <0.0004 1
Pyrene 0 Concentration ug/L <0.2 1
4.45 (129-00-0) 0 Mass lb/day <0.0009 1
EPA Form 3510-2C(Revised 3-19) Page 18

cri identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 001 OMB No.2040-0004
TABLE B.TOXIC METALS, CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence
(check one) Effluent Intake
(optona)
Pollutant/Parameter Testing Units Lon Term n
(and CAS Number,if available) Required Believed Believed I specify; Maximum Maximum Average Number Long Number
Present Absent Daily Monthly Term
Daily of of
Discharge Discharge Average
(required) (if available) Discharge Analyses Value Analyses
(if available)
4.46 1,2,4-trichlorobenzene 0 Concentration ug/L <0.2 1 1
(120-82-1) Mass lb/day <0.0009 1
Section 5.Organic Toxic Pollutants(GC/MS Fraction-Pesticides)
Aldrin ❑ Concentration ug/L <0.00468 1
5.1 ID 1:1
(309-00-2) Mass lb/day <0.0000200 1
a-BHC 0 Concentration ug/L <0.0112 1
5.2 I=1 El
(319-84-6) Mass lb/day <0.0000479 1
5.3 a-BHC ✓❑ El ❑ Concentration ug/L <0.0431 1
(319-85-7) Mass lb/day <0.000184 1
y-BHC El ❑ ❑ Concentration ug/L <0.00487 1
5.4 (58 89 9) Mass lb/day <0.0000208 1
b-BHC 0 Concentration ug/L <0.0103 1
5.5 El El
(319-86-8) Mass lb/day <0.0000441 1
Chlordane 0 Concentration ug/L <0.217 1
5.6 El El
(57-74-9) Mass lb/day <0.000928 1
4,4'-DDT Concentration ug/L <0.00936 1
5.7 El ElEl
(50-29-3) Mass lb/day <0.0000400 1
5.8 4,4'-DDE El ❑ Concentration ug/L <0.0187 1
El
(72-55-9) Mass Ib/dav <0.0000800 1
4,4'-DDD El
Concentration ug/L <0.00843 1
5.9 (72-54-8) Mass lb/day <0.0000361 1
5.10 Dieldrin Concentration ug/L <0.00749 1
El ElEl
(60-57-1) Mass lb/day <0.0000320 1
a-endosulfan 0 Concentration ug/L <0.00281 1
5.11 (115-29-7) Mass lb/day <0.0000120 1
EPA Form 3510-2C(Revised 3-19) Page 19

ti-/A identification Number NPDES Permit Number Facility Name Duffel'Number Form ANN,,,, d 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 001 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence
(check one) Effluent Intake
(optional)
PollutantlParameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Daily of Term of
Discharge Discharge Average
(required) (if available) Dischar(ifavailable)ge Analyses Value Analyses
_
13-endosulfan 0 0 Concentration ug/L <0.00918 1
5.12 (115-29-7) Mass lb/day <0.0000393 1
Endosulfan sulfate 0 Concentration ug/L <0.00936 1
5.13 El El
(1031 07 8) Mass lb/day <0.0000400 1
5.14 Endrin Concentration ug/L <0.00843 1
(72-20-8) Mass lb/day <0.0000361 1
Endrin aldehyde 0 Concentration ug/L <0.00852 1
5.15 0(7421-93-4) Mass lb/day <0.0000365 1
5.16 Heptachlor Concentration ug/L <0.00749 1
(76-44-8) Mass lb/day <0.0000320 1
Heptachlor epoxide Concentration ug/L <0.00468 1
5.17 (1024 57 3) Mass lb/day <0.0000200 1
PCB-1242 Concentration ug/L <0.0936 1
5.18 (53469-21-9) 0 0 Mass lb/day <0.000400 1
PCB-1254 Concentration ug/L <0.0936 1
5.19 (11097-69-1) 0 El El
Mass lb/day <0.000400 1
PCB-1221 o Concentration ug/L <0.0936 1
5.20 (11104-28-2) 0 0
Mass lb/day <0.000400 1
PCB-1232 Concentration ug/L <0.0936 1
5.21 (11141 16 5) 0 0 0
Mass lb/day <0.000400 1
PCB-1248 Concentration ug/L <0.0936 1
5.22 (12672-29-6) 0 El El
Mass lb/day <0.000400 1
PCB-1260 Concentration ug/L <0.0936 1
5.23 (11096-82-5) 0 ❑ El
Mass _ lb/day <0.000400 1
PCB-1016 Concentration ug/L <0.0936 1
5.24 (12674-11-2) 0 ❑ 1=1
Mass lb/day <0.000400 1
EPA Form 3510-2C(Revised 3-19) Page 20

tt'H identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 001 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence Intake
(check one) _ Effluent (optional)
Pollutant'Parameter Testing Units Long-Term
(and CAS Number,if available) Re uired Believed Believed (s eci Maximum Maximum Long
q p N) Daily Monthly Average Number Term Number
Present Absent
Discharge Discharge Daily of Average
of
(required) (if available) Discharge Analyses Value Analyses
(if available)
Toxaphene Concentration ug/L <0.332 1 1
5.25 (8001-35-2) ✓❑ 0 0
Mass lb/day <0.00142 1
1 Sampling shall be conducted according to sufficiently sensitive test procedures(i.e., methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I, subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-20(Revised 3-19) Page 21

This page intentionally left blank.

�i-,identification Number NPDES Permit Number Facility mime Outfall Number Form Appiuved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 001 OMB No.2040-0004
TABLE C.CERTAIN CONVENTIONAL AND NON CONVENTIONAL POLLUTANTS(40 CFR 122.21(g)(7)(vi))1
Presence or Absence
(check one) Effluent Intake
(Optional)
Pollutant Units Maximum Long-Term
Believed Believed (specify) Maximum Daily Long-Term
Present Absent Monthly Average Daily Number of Number of
Discharge Discharge Discharge Analyses Average Analyses
(required) Value
(if available) (if available)
❑ Check here if you believe all pollutants on Table C to be present in your discharge from the noted outfall.You need not complete the"Presence or Absence"column of Table C for
each pollutant.
❑ Check here if you believe all pollutants on Table C to be absent in your discharge from the noted outfall.You need not complete the"Presence or Absence"column of Table C for
each pollutant.
Bromide ❑✓ 0 Concentration mg/L <1.3 1
1' (24959-67-9)
Mass lb/day <5.6 1
Chlorine,total El ❑ Concentration mg/L 0.24 1
2 residual Mass lb/day 1.0 1
3. Color ❑ Concentration CP 5 1
Mass n/a
4. Fecal coliform El 0 Concentration col/dL 14 1
Mass n/a
FluorideEl Concentration mg/L 1.1 1
5' (16984-48-8) 0
Mass lb/day 4.7 1
6 Nitrate nitrite El
mg/L 7.0 1
Mass lb/day 30 1
Nitrogen,total ❑ ❑ Concentration mg/L 0.78 1
7' organic(as N) Mass lb/day 3.34 1
Concentration mg/L <0.5 <0.5 <0.5 19
8. Oil and grease 0 0
Mass lb/day <26.4 <26.4 <20.7 19
9 Phosphorus(as ❑ ❑ Concentration mg/L 12.4 1
P),total(7723-14-0) Mass lb/day 53.1 1
10. Sulfate(as SO4) 0 ❑ Concentration mg/L 825 1
(14808-79-8) Mass lb/day 3530 1
Concentration mg/L <0.70 1
11. Sulfide(as S) 0 0
Mass lb/day <3.0 1
EPA Form 3510-2C(Revised 3-19) Page 23

cr„identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 001 OMB No.2040-0004
TABLE C.CERTAIN CONVENTIONAL AND NON CONVENTIONAL POLLUTANTS(40 CFR 122.21(g)(7)(vi))l
Presence or Absence Intake
(check one) Effluent (Optional)
Units
Pollutant Maximum Long-Term
Believed Believed (specify) Maximum Daily Long-Term
Present Absent Discharge Monthly Average Daily Number of Average Number of
Discharge Discharge Analyses Analyses
(required) Value
(if available) (if available)
12. Sulfite(as SO3) ✓❑ 0 Concentration mg/L <2 1
(14265-45-3) Mass lb/day <8 1
13. Surfactants 0Concentration mg/L <0.040 1
Mass lb/day <0.17 1
-
14. Aluminum,total ❑✓ 0 Concentration mg/L <0.153 1
(7429-90-5) Mass lb/day <0.655 1
15. Barium,total ❑✓ 0 Concentration mg/L 0.0107 1
(7440-39-3) Mass lb/day 0.0458 1
16. Boron,total ✓❑ 0 Concentration mg/L 0.0239 1
(7440-42-8) Mass lb/day 0.102 1
17. Cobalt,total ❑� 0
Concentration mg/L 0.00063 1
(7440-08-4) Mass lb/day 0.0027 1
El
Iron,total El Concentration mg/L 0.128 1
18. (7439-89-6) Mass lb/day 0.548 1
19 Magnesium,total 0 ❑ Concentration mg/L 3.32 1
(7439-95-4) Mass lb/day 14.2 1
Molybdenum, Concentration mg/L 0.00067 1
20. total El El(7439-98-7) Mass lb/day 0.0029 1
21. Manganese,total ✓❑ ❑ Concentration mg/L 0.0415 1
(7439-96-5) Mass lb/day 0.178 1
22 Tin,total Concentration mg/L <0.00060 1
(7440-31-5) Mass lb/day <0.0026 1
23. Titanium,total 0 ❑ Concentration mg/L 0.0078 1
(7440-32-6) Mass lb/day 0.034 1
EPA Form 3510-2C(Revised 3-19) Page 24

Lamm identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 001 OMB No,2040-0004
TABLE C. CERTAIN CONVENTIONAL AND NON CONVENTIONAL POLLUTANTS(40 CFR 122.21(g)(7)(vi))1
Presence or Absence Intake
(check one) Effluent (Optional)
Pollutant Units Maximum Long-Term
Believed Believed (specify) Maximum Daily Long-Term
Present Absent Discharge Monthly Average Daily Number of Average Number of
(required) Discharge Discharge Analyses Value Analyses
I (if available) (if available) _
24. Radioactivity Error
Alpha,total 0Concentration pCi/L <-0.21 1 1
Mass uCi/day <0.412 1
Beta,total Concentration pCi/L 5.16 1
Mass uCi/day 10.1 1
Radium,total 0Concentration pCi/L <0.936 1
0
Mass uCi/day <1.84 1
Radium 226,total Concentration pCi/L <0.694 1
Mass uCi/day <1.36 1
1 Sampling shall be conducted according to sufficiently sensitive test procedures(i.e., methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I,subchapter N or 0. See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2C(Revised 3-19) Page 25

This page intentionally left blank.

.,,dentification Number NPDES Permit Number Facility vame Duffel!Number Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 001 OMB No.2040-0004
TABLE D.CERTAIN HAZARDOUS SUBSTANCES AND ASBESTOS(40 CFR 122.21(g)(7)(vii))l
Presence or Absence
Pollutant (check one) Available Quantitative Data
Believed Believed Reason Pollutant Believed Present in Discharge (specify units)
Present Absent _
1. Asbestos ❑ p
2. Acetaldehyde 0 ✓❑
1 3. Allyl alcohol ❑ ❑✓
4. Allyl chloride ❑ ❑✓
5. Amyl acetate 0 ✓❑
6. Aniline 0 p
7. Benzonitrile 0 ✓❑
8. Benzyl chloride 0 ✓❑
9. Butyl acetate 0 ✓❑
10. Butylamine ❑ ❑✓
11. Captan ❑ ✓❑
12. Carbaryl ✓❑ ❑ May potentially be present in water intake.See attachment F9.3
13. Carbofuran ❑ ❑✓
14. Carbon disulfide ❑ ❑✓
15. Chlorpyrifos ❑ ✓❑
16. Coumaphos 0 ❑✓
17. Cresol 0 ✓❑
18. Crotonaldehyde ❑ ✓❑
19. Cyclohexane 0 ❑✓
EPA Form 3510-2C(Revised 3-19) Page 27

,-,,dentification Number NPDES Permit Number Facility'Name Outfall Number Form 1 ,vdd 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 001 OMB No.2040-0004
TABLE D.CERTAIN HAZARDOUS SUBSTANCES AND ASBESTOS(40 CFR 122.21(g)(7)(vii))1
Presence or Absence
Pollutant (check one) Available Quantitative Data
Believed Believed Reason Pollutant Believed Present in Discharge
(specify units)
Present Absent _
i
20. 2,4-D(2,4-dichlorophenoxyacetic acid) ✓❑ ❑ May potentially be present in water intake.See attachment F9.3
21. Diazinon ❑✓ ❑ May potentially be present in water intake.See attachment F9.3
22. Dicamba ✓❑ ❑ May potentially be present in water intake.See attachment F9.3
23. Dichlobenil ❑ ❑✓
24. Dichlone ❑ ✓❑
25. 2,2-dichloropropionic acid 0 ❑✓
26. Dichlorvos ❑ ❑✓
27. Diethyl amine ❑ ❑✓
28. Dimethyl amine ❑ ❑✓
29. Dintrobenzene 0 ❑✓
30. Diquat 0 ✓❑
31. Disulfoton ❑ ✓❑
32. Diuron ❑✓ 0 May potentially be present in water intake.See attachment F9.3
33. Epichlorohydrin ❑ ✓❑
34. Ethion 0 ❑✓
35. Ethylene diamine 0 ❑✓
36. Ethylene dibromide ❑ ❑✓
37. Formaldehyde ❑✓ ❑ Used at Site,may potentially be present.See attachment F5&F8
38. Furfural 0 0
EPA Form 3510-2C(Revised 3-19) Page 28

identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 001 OMB No.2040-0004
TABLED.CERTAIN HAZARDOUS SUBSTANCES AND ASBESTOS(40 CFR 12221(g)(7)(vii))1
Presence or Absence
Pollutant (check one) Available Quantitative Data
Believed Believed Reason Pollutant Believed Present in Discharge (specify units)
Present Absent
39. Guthion ❑ ❑✓
40. Isoprene ❑ ❑✓
41. Isopropanolamine ❑ ✓❑
42. Kelthane ❑ ❑✓
43. Kepone ❑ ✓❑
44. Malathion ❑✓ ❑ May potentially be present in water intake.See attachment F9.3
45. Mercaptodimethur ❑ ❑✓
46. Methoxychlor ❑ ❑�
47. Methyl mercaptan ❑ ✓❑
48. Methyl methacrylate ❑✓ ❑ Used at Site,may potentially be present.See attachment F5
49. Methyl parathion 0 ✓❑
50. Mevinphos ❑ ✓❑
51. Mexacarbate 0 ❑✓
52. Monoethyl amine 0 ✓❑
53. Monomethyl amine 0
54. Naled ❑ ✓❑
55. Naphthenic acid ❑ ✓❑
56. Nitrotoluene ❑ ✓❑
57. Parathion ❑ ❑✓
EPA Form 3510-2C(Revised 3-19) Page 29

_,..,dentification Number NPDES Permit Number Facility i.i,e Dutfall Number Form l,Np,,.ed 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 001 OMB No.2040-0004
TABLE D.CERTAIN HAZARDOUS SUBSTANCES AND ASBESTOS(40 CFR 12221(g)(7)(vii))1
Presence or Absence i
Pollutant (check one) Available Quantitative Data
Believed Believed Reason Pollutant Believed Present in Discharge
(specify units)
Present Absent
58. Phenolsulfonate ❑ ✓❑
59. Phosgene ❑ ❑✓
60. Propargite ❑ ✓❑
61. Propylene oxide ❑ ✓❑
62. Pyrethrins ❑✓ ❑ Used at Site,may potentially be present.See attachment F8
63. Quinoline 0 ✓❑
64. Resorcinol 0 ❑✓
65. Strontium ✓❑ ❑ May potentially be present in water intake.See attachment F9.3
66. Strychnine 0 ❑✓
67. Styrene ✓❑ ❑ May potentially be present in water intake.See attachment F9.3
68. 2,4,5-T(2,4,5-trichlorophenoxyacetic ❑ ❑✓
acid)
69. TDE(tetrachlorodiphenyl ethane) 0 ❑✓
70 2,4,5-TP[2-(2,4,5-trichlorophenoxy) ❑ ✓❑
propanoic acid]
71. Trichlorofon ❑ ✓❑
72. Triethanolamine ❑ ✓❑
73. Triethylamine ✓❑ ❑ Used at Site,may potentially be present.See attachment F5
74. Trimethylamine ❑ ❑✓
75. Uranium 0 ❑✓
76. Vanadium ❑ ✓❑
EPA Form 3510-2C(Revised 3-19) Page 30

pi-.,identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 001 OMB No.2040-0004
TABLE D.CERTAIN HAZARDOUS SUBSTANCES AND ASBESTOS(40 CFR 12221(g)(7)(vii))l
Presence or Absence
Pollutant (check one) Reason Pollutant Believed Present in Discharge Available Quantitative Data
Believed Believed (specify units)
Present Absent
77. Vinyl acetate 0 ❑✓
78. Xylene 0 ✓❑
79. Xylenol ❑ ✓❑
80. Zirconium ❑✓ 0 Used at Site,may potentially be present.See attachment F5
1 Sampling shall be conducted according to sufficiently sensitive test procedures(i.e., methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I,subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2C(Revised 3-19) Page 31

This page intentionally left blank.

,,,dentification Number NPDES Permit Number Facilit,,.u,,.a Outfall Number Form f,,,, . d 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 001 OMB No.2040-0004
TABLE E.2,3,7,8 TETRACHLORODIBENZO P DIOXIN(2,3,7,8 TCDD)(40 CFR 122.21(g)(7)(viii))
TCDD Presence or
Congeners Absence
Pollutant Used or (check one) Results of Screening Procedure
Manufactured Believed Believed
Present , Absent
Outfall sample was analyzed via Method 1613B"Dioxins and Furans(HRGC/HRMS)"with a result of no
2,3,7,8-TCDD Q detectable 2,3,7,8-TCDD at an analytical reporting level of 9.5 pg/L.
EPA Form 3510-2C(Revised 3-19) Page 33

RECEIVED
NOV 3 0 2020
NCDEQIDWRINPDES
Attachment B — Form 2C Outfall 002

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works OMB No.2040-0004
Form U.S.Environmental Protection Agency
2C 'Co EPA Application for NPDES Permit to Discharge Wastewater
NPDES EXISTING MANUFACTURING,COMMERCIAL,MINING,AND SILVICULTURE OPERATIONS
SECTION 1.OUTFALL LOCATION(40 CFR 122.21(g)(1))
1.1 Provide information on each of the facility's outfalls in the table below.
R g Numbelr Receiving Water Name Latitude Longitude
p
J
0
SECTION 2. LINE DRAWING(40 CFR 122.21(g)(2))
a, 2.1 Have you attached a line drawing to this application that shows the water flow through your facility with a water
_ .3 balance?(See instructions for drawing requirements.See Exhibit 2C-1 at end of instructions for example.)
J
o ❑ Yes ❑ No
SECTION 3.AVERAGE FLOWS AND TREATMENT(40 CFR 122.21(g)(3))
3.1 For each outfall identified under Item 1.1,provide average flow and treatment information.Add additional sheets if
necessary.
"Outfall Number** 002
Operations Contributing to Flow
Operation Average Flow
mgd
mgd
mgd
3 mgd
0 Treatment Units
CD Description Code from Final Disposal of Solid or
(include size,flow rate through each treatment unit, Liquid Wastes Other Than
retention time,etc.) Table 2C-1 by Discharge
Content not filled in here is provided in the 2C form filled in for Outfall 001
EPA Form 3510-2C(Revised 3-19) Page 1

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works OMB No.2040-0004
3.1 **Outfall Number" 002
cont. Operations Contributing to Flow
Operation Average Flow
mgd
mgd
mgd
mgd
Treatment Units
Description Code from Final Disposal of Solid or
(include size,flow rate through each treatment unit, Table 2C-1 Liquid Wastes Other Than
retention time,etc.) by Discharge
c
0
U
c
d
E
CD
�a
i L
**Outfall Number"
Operations Contributing to Flow
o Operation Average Flow
mgd
mgd
mgd
mgd
Treatment Units
Description Code from Final Disposal of Solid or
(include size,flow rate through each treatment unit, Liquid Wastes Other Than
retention time,etc.) Table 2C•1 by Discharge
3.2 Are you applying for an NPDES permit to operate a privately owned treatment works?
d ❑ Yes ❑ No .4 SKIP to Section 4.
3.3 Have you attached a list that identifies each user of the treatment works?
❑ Yes ❑ No
Content not filled in here is provided in the 2C form filled in for Outfall 001
EPA Form 3510-2C(Revised 3-19) Page 2

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works OMB No.2040-0004
SECTION 4. INTERMITTENT FLOWS(40 CFR 122.21(g)(4))
4.1 Except for storm runoff, leaks,or spills,are any discharges described in Sections 1 and 3 intermittent or seasonal?
❑ Yes ❑ No 4 SKIP to Section 5.
4.2 Provide information on intermittent or seasonal flows for each applicable outfall.Attach additional pages, if necessary.
Outfall Operation Frequency Flow Rate
Number (list) Average Average Long-Term Maximum Duration
Da slWeek Months/Year Average Dail
d• mgd mgd days
mgd mgd days
0
u_
d• mgd mgd days
iL5 days/week months/year mgd mgd days
days/week months/year mgd mgd days
d.ys/week months/year mgd mgd days
d• mgd mgd days
days/week months/year mgd mgd days
days/week months/year mgd mgd days
SECTION 5. PRODUCTION (40 CFR 122.21(g)(5))
5.1 Do any effluent limitation guidelines(ELGs)promulgated by EPA under Section 304 of the CWA apply to your facility?
❑ Yes ❑ No 4 SKIP to Section 6.
n 5.2 Provide the following information on applicable ELGs.
ELG Category ELG Subcategory Regulatory Citation
Q.
5.3 Are any of the applicable ELGs expressed in terms of production (or other measure of operation)?
❑ Yes ❑ No 4 SKIP to Section 6.
cts
5.4 Provide an actual measure of daily production expressed in terms and units of applicable ELGs.
Outfall Unit of
Number Operation,Product,or Material Quantity per Day Measure
10
m
O
7
'O
a
Content not filled in here is provided in the 2C form filled in for Outfall 001
EPA Form 3510-2C(Revised 3-19) Page 3

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works OMB No.2040-0004
SECTION 6. IMPROVEMENTS(40 CFR 122.21(g)(6))
6.1 Are you presently required by any federal, state,or local authority to meet an implementation schedule for constructing,
upgrading,or operating wastewater treatment equipment or practices or any other environmental programs that could
affect the discharges described in this application?
❑ Yes ❑ No 4 SKIP to Item 6.3.
6.2 Briefly identify each applicable project in the table below.
Affected Final Compliance Dates
Brief Identification and Description of Outfalls Source(s)of
Project (list outfall Discharge Required Projected
number)
E
-a
co
V)
co
"O
co
Q
6.3 Have you attached sheets describing any additional water pollution control programs(or other environmental projects
that may affect your discharges)that you now have underway or planned?(optional item)
❑ Yes ❑ No ❑ Not applicable
SECTION 7.EFFLUENT AND INTAKE CHARACTERISTICS(40 CFR 122.21(g)(7))
See the instructions to determine the pollutants and parameters you are required to monitor and, in turn,the tables you must
complete. Not all applicants need to complete each table.
Table A.Conventional and Non-Conventional Pollutants
7.1 Are you requesting a waiver from your NPDES permitting authority for one or more of the Table A pollutants for any of
your outfalls?
❑ Yes ❑ No 4 SKIP to Item 7.3.
7.2 If yes, indicate the applicable outfalls below.Attach waiver request and other required information to the application.
Outfall Number Outfall Number Outfall Number
to
7.3 Have you completed monitoring for all Table A pollutants at each of your outfalls for which a waiver has not been
H requested and attached the results to this application package?
"L
CD
El Yes No;a waiver has been requested from my NPDES
❑ permitting authority for all pollutants at all outfalls.
v Table B.Toxic Metals,Cyanide,Total Phenols,and Organic Toxic Pollutants
7.4 Do any of the facility's processes that contribute wastewater fall into one or more of the primary industry categories
listed in Exhibit 2C-3?(See end of instructions for exhibit.)
❑ Yes ❑ No 4 SKIP to Item 7.8.
3 7.5 Have you checked"Testing Required"for all toxic metals,cyanide, and total phenols in Section 1 of Table B?
w
❑ Yes El No
7.6 List the applicable primary industry categories and check the boxes indicating the required GC/MS fraction(s)identified
in Exhibit 2C-3.
Primary Industry Category Required GC/MS Fraction(s)
(Check applicable boxes.)
❑Volatile 0 Acid 0 Base/Neutral 0 Pesticide
❑Volatile ❑Acid 0 Base/Neutral 0 Pesticide
❑Volatile 0 Acid 0 Base/Neutral 0 Pesticide
Content not filled in here is provided in the 2C form filled in for Outfall 001
EPA Form 3510-2C(Revised 3-19) Page 4

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works OMB No.2040-0004
7.7 Have you checked"Testing Required"for all required pollutants in Sections 2 through 5 of Table B for each of the
GC/MS fractions checked in Item 7.6?
❑ Yes ❑ No
7.8 Have you checked"Believed Present"or"Believed Absent"for all pollutants listed in Sections 1 through 5 of Table B
where testing is not required?
❑ Yes ❑ No
7.9 Have you provided(1)quantitative data for those Section 1,Table B, pollutants for which you have indicated testing is
required or(2)quantitative data or other required information for those Section 1,Table B,pollutants that you have
indicated are"Believed Present"in your discharge?
❑ Yes ❑ No
7.10 Does the applicant qualify for a small business exemption under the criteria specified in the instructions?
❑ Yes 4 Note that you qualify at the top of Table B, ❑ No
then SKIP to Item 7.12.
c 7.11 Have you provided(1)quantitative data for those Sections 2 through 5,Table B,pollutants for which you have
c determined testing is required or(2)quantitative data or an explanation for those Sections 2 through 5,Table B,
pollutants you have indicated are"Believed Present"in your discharge?
❑ Yes
to El No
CI; Table C.Certain Conventional and Non-Conventional Pollutants
L 7.12 Have you indicated whether pollutants are"Believed Present"or"Believed Absent"for all pollutants listed on Table C
for all outfalls?
❑ Yes ❑ No
c 7.13 Have you completed Table C by providing(1)quantitative data for those pollutants that are limited either directly or
indirectly in an ELG and/or(2)quantitative data or an explanation for those pollutants for which you have indicated
"Believed Present"?
❑ Yes ❑ No
Table D.Certain Hazardous Substances and Asbestos
7.14 Have you indicated whether pollutants are"Believed Present"or"Believed Absent"for all pollutants listed in Table D for
all outfalls?
❑ Yes ❑ No
7.15 Have you completed Table D by(1)describing the reasons the applicable pollutants are expected to be discharged
and(2)by providing quantitative data, if available?
❑ Yes ❑ No
Table E.2,3,7,8-Tetrachlorodibenzo-p-Dioxin(2,3,7,8-TCDD)
7.16 Does the facility use or manufacture one or more of the 2,3,7,8-TCDD congeners listed in the instructions,or do you
know or have reason to believe that TCDD is or may be present in the effluent?
❑ Yes 4 Complete Table E. ❑ No 4 SKIP to Section 8.
7.17 Have you completed Table E by reporting qualitative data for TCDD?
❑ Yes ❑ No
SECTION 8.USED OR MANUFACTURED TOXICS(40 CFR 122.21(g)(9))
8.1 Is any pollutant listed in Table B a substance or a component of a substance used or manufactured at your facility as
d an intermediate or final product or byproduct?
❑ Yes ❑ No 4 SKIP to Section 9.
8.2 List the pollutants below.
1. 4. 7.
0
2. 5. 8.
N
3. 6. 9.
Content not filled in here is provided in the 2C form filled in for Outfall 001
EPA Form 3510-2C(Revised 3-19) Page 5

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works OMB No.2040-0004
•ECTION 9. BIOLOGICAL TOXICITY TESTS(40 CFR 122.21(g)(11))
9.1 Do you have any knowledge or reason to believe that any biological test for acute or chronic toxicity has been made
within the last three years on(1)any of your discharges or(2)on a receiving water in relation to your discharge?
�, ❑✓ Yes ❑ No 4 SKIP to Section 10.
Y
y
± 9.2 Identify the tests and their ourposes below.
Test(s) Purpose of Test(s) Submitted to NPDES Date Submitted
o Permitting Authority?
NC Chronic Effluent Whole Effluent Toxicity ✓❑ Yes ❑ No 06/06/2019
BioassayProcedureperformed quarterly
q
o ❑ Yes ❑ No
❑ Yes ❑ No
•ECTION 10.CONTRACT ANALYSES(40 CFR 122.21(g)(12))
10.1 Were any of the analyses reported in Section 7 performed by a contract laboratory or consulting firm?
❑✓ Yes ❑ No 4 SKIP to Section 11,
10.2 Provide information for each contract laboratory or consulting firm below.
Laboratory Number 1 Laboratory Number 2 Laboratory Number 3
Name of laboratory/firm
Laboratory address
a
o Phone number
U
Pollutant(s)analyzed
SECTION 11.ADDITIONAL INFORMATION(40 CFR 122.21(g)(13))
11.1 Has the NPDES permitting authority requested additional information?
❑ Yes ❑ No -4 SKIP to Section 12.
11.2 List the information requested and attach it to this application.
1. 4.
0 2. 5.
3. 6.
Content not filled in here is provided in the 2C form filled in for Outfall 001
EPA Form 3510-2C(Revised 3-19) Page 6

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works OMB No.2040-0004
SECTION 12.CHECKLIST AND CERTIFICATION STATEMENT(40 CFR 122.22(a)and(d))
12.1 In Column 1 below,mark the sections of Form 2C that you have completed and are submitting with your application.
For each section,specify in Column 2 any attachments that you are enclosing to alert the permitting authority.Note
that not all applicants are required to complete all sections or provide attachments.
Column 1 Column 2
❑ Section 1:Outfall Location ❑ w/attachments
0 Section 2:Line Drawing ❑ w/line drawing ❑ w/additional attachments
w/list of each user of
Section 3:Average Flows and
"I Treatment ❑ w/attachments ❑ privately owned treatment
works
0 Section 4: Intermittent Flows ❑ w/attachments
❑ Section 5:Production ❑ w/attachments
w/optional additional
❑ Section 6: Improvements ❑ w/attachments ❑ sheets describing any
additional pollution control
plans
❑ w/request for a waiver and ❑ w/explanation for identical
supporting information outfalls
•d w/small business exemption
v ❑ request ❑ w/other attachments
Section 7: Effluent and Intake
❑ Characteristics ❑ w/Table A 0 w/Table B
0
0 w/Table C ❑ w/Table D
❑ w/Table E ❑ w/analytical results as an
attachment
c Section 8: Used or Manufactured
❑ Toxics ❑ wl attachments
11) Section 9: Biological Toxicity
°' ❑ Tests 0 w/attachments
L
U
❑ Section 10:Contract Analyses ❑ w/attachments
0 Section 11:Additional Information 0 w/attachments
Section 12:Checklist and
❑ Certification Statement ❑ w/attachments
12.2 Certification Statement
I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in
accordance with a system designed to assure that qualified personnel properly gather and evaluate the information
submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly
responsible for gathering the information, the information submitted is, to the best of my knowledge and belief,true,
accurate,and complete. I am aware that there are significant penalties for submitting false information,including the
possibility of fine and imprisonment for knowing violations.
Name(print or type first and last name) Official title
BRIAN D.LONG n �L"t�/ PLANT MANAGER
Signature (� Date signed
�1/fi3 /cam
Content not filled in here is provided in the 2C form filled in for Outfall 001
EPA Form 3510-2C(Revised 3-19) Page 7

This page intentionally left blank.

antification Number NPDES Permit Number Facility Outfall Number Form AE 03/05/19
047 368 642 NC0003573 Chemours Fayet-.,,, Works 002 OM_ _ _340-0004
TABLE A.CONVENTIONAL AND NON CONVENTIONAL POLLUTANTS(40 CFR 122.21(g)(7)(iii))t
Intae
Effluent p(O ional)
Waiver Units Maximum Maximum Long-Term
Pollutant Requested (specify) Daily Monthly Average Daily Number of Long-Term Number of
(if applicable)
Discharge Discharge Discharge Analyses Average Value Analyses
(required) (if available) (if available) i
0 Check here if you have applied to your NPDES permitting authority for a waiver for all of the pollutants listed on this table for the noted outfall.
Biochemical oxygen demand Concentration mg/L 5.2 5.2 2.2 7 6.05 1
1' ❑
(BODs) Mass lb/day 985 985 426 7 1035 1
Chemical oxygen demand Concentration mg/L 46.0 46.0 19.2 7 22.2 1
2. ❑
(COD)
Mass lb/day 9423 9423 3690 7 3797 1
Concentration mg/L 5.3 1 5.1 1
3. Total organic carbon (TOC) 0
Mass lb/day 1165 1 872 1
Concentration mg/L 10.1 1 5.52 1
4. Total suspended solids(TSS) 0
Mass lb/day 2220 1 944 1
Concentration mg/L <0.25 1 0.6 1
5. Ammonia(as N) ❑
Mass lb/day <55 1 103 1
6. Flow 0 Rate MGD 48.328 27.134 20.961 538 20.510 1
Temperature(winter) 0 °C °C 24.0 15.5 12.9 122
7.
Temperature(summer) El °C °C 32.0 29.6 29.3 65 25 1
pH(minimum) El Standard units S.U. 6.15 n/a n/a 369 6.5 1
8.
pH(maximum) 0 Standard units s.u. 7.68 n/a n/a 369 6.5 1
1 Sampling shall be conducted according to sufficiently sensitive test procedures(i.e., methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I, subchapter N or 0. See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2C(Revised 3-19) Page 9

This page intentionally left blank.

Err,iuentification Number NPDES Permit Number Facility Nance Outfall Number Form Apr,,,,....03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 002 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence Intake
(check one) Effluent
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Daily of Term of
Discharge Df availablee
Discharge Analyses AValuee Analyses
(required) ( (if available)
0 Check here if you qualify as a small business per the instructions to Form 2C and,therefore,do not need to submit quantitative data for any of the organic toxic pollutants in Sections
2 through 5 of this table. Note, however,that you must still indicate in the appropriate column of this table if you believe any of the pollutants listed are present in your discharge.
Section 1.Toxic Metals,Cyanide,and Total Phenols
Antimony,total Concentration mg/L <0.00041 1 <0.00041 1
1.1 (7440-36-0) Mass lb/day <0.090 1 <0.070 1
Arsenic,total Concentration mg/L 0.00075 1 0.0008 1
1.2 (7440-38-2) El El Mass lb/day 0.16 1 0.1 1
Beryllium,total Concentration mg/L <0.000091 1 <0.00009 1
1.3 El El El
(7440-41-7) Mass lb/day <0.020 1 <0.016 1
Cadmium,total Concentration mg/L <0.00015 1 <0.00015 1
1.4 El El El
(7440-43-9) Mass lb/day <0.033 1 <0.026 1
Chromium, total Concentration mg/L 0.0011 1 0.00071 1
1.5 (7440-47-3) Mass lb/day 0.24 1 0.12 1
Copper, total Concentration mg/L <0.0099 1 <0.0099 1
1.6 _
(7440-50-8) Mass lb/day <2.2 1 <1.7 1
Lead, total Concentration mg/L <0.0011 1 <0.0011 1
1.7 0
(7439-92-1) El El Mass lb/day <0.24 1 <0.19 1
Mercury,total Concentration mg/L 0.0000059 0.0000047 4 <0.000039 4
1.8 El El El
(7439-97-6) Mass lb/day 0.001 1 <0.00065 1
1.9 Nickel, total Concentration mg/L 0.0016 1 0.0012 1
El El El
(7440-02-0) Mass lb/day 0.33 1 0.21 1
Selenium,total ❑ Concentration mg/L <0.00065 1 <0.00065 1
1.10 (7782-49-2) Mass lb/day <0.14 1 <0.11 1
1.11 Silver,total Concentration mg/L <0.00017 1 <0.00017 1
(7440-22-4) Mass fib/day <0.037 1 <0.029 1
EPA Form 3510-2C(Revised 3-19) Page 11

cri iuentification Number NPDES Permit Number Facility ivame Outfall Number Form Apnioveu 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 002 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence Intake
(check one) Effluent
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
Discharge Discharge Daily of Average of
(required) (if available) Discharge Analyses Value Analyses
(if available)
Thallium,total ❑ ❑ ❑ Concentration mg/L <0.00011 1 <0.00011 1
1.12 (7440-28-0) Mass lb/day <0.024 1 <0.019 1
1.13 Zinc,total ❑ 0
0
Concentration mg/L 0.0094 1 0.0067 1
(7440-66-6) Mass b/day 2.1 1 1.1 1
1.14 Cyanide,total Concentration mg/L <0.0050 1 <0.0050 1
(57-12-5) El El ❑ Mass b/day <1.1 1 <0.86 1
Concentration mg/L <0.010 1 <0.010 1
1.15 Phenols,total ❑✓ 0 0
Mass b/day <2.2 1 <1.7 1
Section 2.Organic Toxic Pollutants(GCIMS Fraction-Volatile Compounds)
21 Acrolein El 0 0 Concentration ug/L <1.00 1 <5.00 1
(107-02-8) Mass lb/day <0.220 1 <0855 1
Acrylonitrile ID ❑ ❑ Concentration ug/L <0.20 1 <1.00 1
2.2 (107-13-1) Mass lb/day <0.044 1 <0.171 1
Benzene El ❑ ❑ Concentration ug/L <0.050 1 <0.25 1
2.3 (71-43-2) Mass lb/day <0.011 1 <0.043 1
Bromoform ❑ 0 0 Concentration ug/L <0.10 1 <0.50 1
2.4 (75-25-2) Mass lb/day <0.022 1 <0.086 1
Carbon tetrachloride ❑ ❑ ❑ Concentration ug/L <0.10 1 <0.50 1
2.5 (56-23-5) Mass lb/day <0.022 1 <0.086 1
Chlorobenzene ❑ ❑ ❑ Concentration ug/L <0.10 1 <0.50 1
2.6 (108-90-7) Mass lb/day <0.022 1 <0.086 1
2.7 Chlorodibromomethane ❑ ❑ ❑ Concentration ug/L 1.68 1 <0.50 1
(124-48-1) Mass lb/day 0.369 1 <0.086 1
Chloroethane El ❑ ❑ Concentration ug/L <0.10 1 <0.50 1
2.8 (75-00-3) Mass lb/day <0.022 1 <0.086 1
EPA Form 3510-2C(Revised 3-19) Page 12

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 002 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence Intake
(check one) Effluent
(optional)
PollutantlParameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
Discharge Discharge Daily of Average of
(required) (if available) Discharge Analyses Analyses
Value
(if available)
2.9 2-chloroethylvinyl ether El 0 ❑ Concentration ug/L <0.050 1 <2.50 1
(110-75-8) Mass lb/day <0.011 1 <0.428 1
Concentration ug/L 51.3 1 <0.50 1
2.10 Chloroform(67-66-3) ❑✓ 0 ❑
Mass lb/day 11.3 1 <0.086 1
2.11 Dichlorobromomethane ❑ 0
0 Concentration ug/L 14.1 1 <1.00 1
(75-27-4) Mass lb/day 3.1 1 <0.171 1
212 1,1-dichloroethane El 0 0 Concentration ug/L <0.10 1 <0.50 1
(75-34-3) Mass lb/day <0.022 1 <0.086 1
1,2-dichloroethane ❑ ❑ ❑ Concentration ug/L <0.20 1 <1.00 1
2.13 (107-06-2) Mass lb/day <0.044 1 <0.171 1
2.14 1,1-dichloroethylene 0 0
0
Concentration ug/L <0.20 1 <1.00 1
(75-35-4) Mass lb/day <0.044 1 <0.171 1
2.15 12-dichloropropane El 0
0
Concentration ug/L <0.20 1 <1.00 1
(78-87-5) Mass lb/day <0.044 1 <0.171 1
1,3-dichloropropylene ❑ ❑ 0 Concentration ug/L <0.080 1 <0.40 1
2.16 (542-75-6) Mass lb/day <0.018 1 <0.068 1
Ethylbenzene El ❑ ❑ Concentration ug/L <0.10 1 <0.50 1
2.17 (100-41-4) Mass lb/day <0.022 1 <0.086 1
218 Methyl bromide El 0 0 Concentration ug/L <0.10 1 <0.50 1
(74-83-9) Mass lb/day <0.022 1 <0.086 1
2.19 Methyl chloride ❑ ❑ ❑ Concentration ug/L <0.30 1 <1.50 1
(74-87-3) Mass lb/day <0.066 1 <0.257 1
2.20 Methylene chloride El 0
0
Concentration ug/L <0.30 1 <1.50 1
(75-09-2) Mass lb/day <0.066 1 <0.257 1
2.21 1,1,2,2-tetrachloroethane El ❑ 0
Concentration ug/L <0.050 1 <0.25 1
(79-34-5) Mass lb/day <0.011 1 <0.043 1
EPA Form 3510-2C(Revised 3-19) Page 13

EYH iaentification Number NPDES Permit Number Facility Warne Outfall Number Form ApN,„,�„03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 002 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))'
Presence or Absence
(check one) Effluent Intake
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long Number
Present Absent Daily Monthly Daily of Term of
Discharge Discharge Average
Discharge Analyses Analyses
(required) (if available) Value
(if available)
Tetrachloroethylene ❑ ❑ ❑ Concentration ug/L <0.20 1 <1.00 1
2.22 (127-18-4) Mass lb/day <0.044 1 <0.171 1
Concentration ug/L g/L <0.050 1 <0.25 1
2.23 ✓
(108-88-3) Mass lb/day <0.011 1 <0.043 1
1,2-trans-dichloroethylene Concentration ug/L <0.10 1 <0.50 1
2.24 (156-60-5) Mass lb/day <0.022 1 <0.086 1
1,1,1-trichloroethane Concentration ug/L <0.10 1 <0.50 1
2.25 l 0 El
(71-55-6) ✓ Mass lb/day <0.022 1 <0.086 1
1,1,2-trichloroethane El ❑ ❑ Concentration ug/L <0.20 1 <1.00 1
2.26 (79-00-5) Mass lb/day <0.044 1 <0.171 1
2.27 Trichloroethylene Concentration ug/L <0.20 1 <1.00 1 .
79-01-6
( ) Mass lb/day <0.044 1 <0.171 1
Concentration ug/L < .
Vinyl chloride ❑ ❑ 0 30 1 <1.50 1
2.28 (75-01-4) Mass lb/day <0.066 1 <0.257
Section 3.Organic Toxic Pollutants(GCIMS Fraction-Acid Compounds)
2-chlorophenol Concentration ug/L <0.2 1 <0.2 1
3.1 (95-57-8) ✓ Mass lb/day <0.04 1 <0.03 1
2,4-dichlorophenol Concentration ug/L <0.09 1 <0.09 1
3.2 (120-83-2) Mass lb/day <0.02 _ 1 <0.02 1
2,4-dimethylphenol 0 ElConcentration ug/L <0.2 1 <0.2 1
3.3 (105-67-9) Mass lb/day <0.04 1 <0.03 1
4,6-dinitro-o-cresol Concentration ug/L <0.9 1 <0.9 1
3.4 (534-52-1) ✓ Mass Ib/day <0.2 1 <0.2 1
2,4-dinitrophenol Concentration ug/L <0.9 1 <0.9 1
3.5 (51-28-5) Mass lb/day <0.2 1 <0.2 1
EPA Form 3510-2C(Revised 3-19) Page 14

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Appruveu 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 002 OMB No,2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence Intake
(check one) Effluent
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Daily of Term of
Discharge Discharge Average
(required) (if available) Discharge Analyses Value Analyses
(if available)
2-nitrophenol Concentration ug/L <0.3 1 <0.3 1
3.6 0 CI CI
(88-75-5) Mass lb/day <0.07 1 <0.05 1
4-nitrophenol Concentration ug/L <0.8 1 <0.8 1
3.7 (100-02-7) Mass lb/day <0.2 1 <0.1 1
p-chloro-m-cresol ❑ Concentration ug/L <0.3 1 <0.3 1
3.8 CI CI(59-50-7) Mass lb/day <0.07 1 <0.05 1
Pentachlorophenol Concentration ug/L <0.7 1 <0.7 1
3.9 El 0 El
(87-86-5) Mass lb/day <0.2 <0.2 1 <0.1 1
3.10 Phenol Concentration ug/L <0.4 1 <0.4 1
(108-95-2) Mass lb/day <0.09 1 <0.07 1
2,4,6-trichlorophenol Concentration ug/L <0.2 1 <0.2 1
3.11 ( 1:1 El CI
88 05 2) Mass lb/day <0.04 1 <0.03 1
Section 4.Organic Toxic Pollutants(GC/MS Fraction-Base/Neutral Compounds)
4.1 Acenaphthene Concentration ug/L <0.08 1 <0.08 1
0 CI CI
(83-32-9) Mass lb/day <0.02 1 <0.01 1
4.2 Acenaphthylene Concentration ug/L <0.07 1 <0.07 1
(208-96-8) Mass lb/day <0.02 1 <0.01 1
Anthracene Concentration ug/L <0.07 1 <0.07 1
4.3 (120-12-7) Mass lb/day <0.02 1 <0.01 1
Benzidine Concentration ug/L <6 1 <6 1
4.4 El 0 CI
(92-87-5) Mass lb/day <1 1 <1 1
4.5 Benzo(a)anthracene Concentration ug/L <0.2 1 <0.2 1
(56-55-3) Mass lb/day <0.04 1 <0.03 1
4.6 Benzo(a)pyrene Concentration ug/L <0.2 1 <0.2 1
(50-32-8) Mass lb/day <0.04 1 <0.03 1
EPA Form 3510-2C(Revised 3-19) Page 15

,,identification Number NPDES Permit Number Facility ivame Outfall Number Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 002 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence Intake
(check one) Effluent
- (optional)
Pollutant/Parameter Testing Units I Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Daily of Term of
Discharge Discharge Discharge Analyses Average Analyses
(required) (if available) (if available) Value
3,4-benzofluoranthene 0 ❑ Concentration ug/L <0.07 1 <0.07 1
4.7 (205-99-2) Mass lb/day <0.02 1 <0.01 1
4.8 Benzo(ghi)perylene 0 Concentration ug/L <0.09 1 <0.09 1
(191-24-2) Mass lb/day <0.02 1 <0.02 1
4.9 Benzo(k)fluoranthene ❑ Concentration ug/L <0.09 1 <0.09 1
ID El
(207-08-9) Mass lb/day <0.02 1 <0.02 1
Bis(2-chloroethoxy)methane Concentration ug/L <0.2 1 <0.2 1
4.10 (111-91-1) Mass lb/day <0.04 1 <0.03 1
Bis(2-chloroethyl)ether Concentration ug/L <0.09 1 <0.09 1
4.11 El El 0
(111-44-4) Mass lb/day <0.02 1 <0.02 1
4.12 Bis(2-chloroisopropyl)ether Concentration ug/L <0.09 1 <0.09 1
El El 0
(102-80-1) Mass lb/day <0.02 1 <0.02 1
4.13 Bis(2-ethylhexyl)phthalate El
ug/L 7 1 7 1
El
(117-81-7) Mass lb/day 2 1 1 1
4.14 4-bromophenyl phenyl ether 0 Concentration ug/L <0.2 1 <0.2 1
El El
(101-55-3) Mass lb/day <0.04 1 <0.03 1
Butyl benzyl phthalate Concentration ug/L <0.9 _ 1 <0.9 _ 1
4.15 (85-68-7) Mass lb/day <0.20 1 <0.2 1
4.16 2-chloronaphthalene Concentration ug/L <0.6 1 <0.6 1
El El0
(91-58-7) Mass lb/day <0.1 1 <0.1 1
4.17 4-chlorophenyl phenyl ether D Concentration ug/L <0.2 1 <0.2 1
El 1:1
(7005-72-3) Mass lb/day <0.04 1 <0.03 1
Chrysene Concentration ug/L <0.2 1 <0.2 1
4.18 El 0 El
(218-01-9) Mass lb/day <0.04 1 <0.03 1
Dibenzo(a,h)anthracene Concentration ug/L <0.09 1 <0.09 1
4.19 El El El
(53-70-3) Mass lb/day <0.02 1 <0.02 1
EPA Form 3510-2C(Revised 3-19) Page 16

,_� wantification Number NPDES Permit Number Facility,.a,,IG Outfall Number Form App.03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 002 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))l
Presence or Absence
(check one) Effluent Intake
(optional)
Pollutant]Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
Discharge Discharge Daily of Average II of
(required) (if available) Discharge Analyses Value Analyses
(if available)
12-dichlorobenzene Concentration ug/L <0.2 1 <0.2 1
4.20 (95-50-1) Mass lb/day <0.04 1 <0.03 1
1,3-dichlorobenzene Concentration ug/L <0.09 1 <0.09 1
40
.21 (541-73-1) Mass lb/day <0.02 1 <0.02 1
1,4-dichlorobenzene 0 Concentration ug/L <0.2 1 <0.2 1
4.22 (106-46-7) El
Mass lb/day <0.04 1 <0.03 1
3,3-dichlorobenzidine Concentration ug/L <0.09 1 <0.09 1
410
.23 (91-94-1) 0 Mass lb/day <0.02 1 <0.02 1
4.24 Diethyl phthalate Concentration ug/L <0.3 1 <0.3 1
(84-66-2) Mass lb/day <0.07 1 <0.05 1
Dimethyl phthalate Concentration ug/L <0.5 1 <0.5 1
4.25 (131 11 3) Mass lb/day <0.1 1 <0.09 1
Di-n-butyl phthalate 0 0 Concentration ug/L <0.9 1 <0.9 1
4.26 (84-74-2) Mass lb/day <0.2 1 <0.2 1
2,4-dinitrotoluene Concentration ug/L <0.09 1 <0.09 1
4.27 0
(121-14-2) El 0 Mass lb/day <0.02 1 <0.02 1
2,6-dinitrotoluene Concentration ug/L <0.2 1 <0.2 1
4.28 10
(606-20-2) El 0 Mass lb/day <0.04 1 <0.03 1
Di-n-octyl phthalate Concentration ug/L <0.5 1 <0.5 1
4.29 0
(117-84-0) Mass lb/day <0.1 1 <0.09 1
4.30 1,2-Diphenylhydrazine Concentration ug/L <0.09 1 <0.09 1
El 0El
(as azobenzene)(122-66-7) Mass lb/day <0.02 1 <0.02 1
4.31 Fluoranthene 0 Concentration ug/L <0.2 1 <0.2 1
(206-44-0) Mass lb/day <0.04 1 <0.03 1
Fluorene 0 Concentration ug/L <0.08 1 <0.08 1
4.32 El 10
(86-73-7) Mass lb/day <0.02 1 <0.01 1
EPA Form 3510-2C(Revised 3-19) Page 17

trH iaentification Number NPDES Permit Number Facility Name Outfall Number Form Approvea 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 002 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence Intake
(check one) Effluent
(optional)
PollutantlParameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
of of
Discharge Discharge DisDcharge aily Analyses Average Analyses
(required) (if available) (if available) Value
Hexachlorobenzene 0 ❑ Concentration ug/L <0.5 1 <0.5 1
4.33 (118-74-1) Mass lb/day <0.1 1 <0.09 1
Hexachlorobutadiene Concentration ug/L <0.2 1 <0.2 1
4.34 (87-68-3) Mass lb/day <0.04 1 <0.03 1
Hexachlorocyclopentadiene ❑ ElConcentration ug/L <0.2 1 <0.2 1
4.35 (77 47 4) Mass lb/day <0.04 1 <0.03 1
Hexachloroethane 0 ❑ Concentration ug/L <0.09 1 <0.09 1
4.36 (67 72 1) Mass lb/day <0.02 1 <0.02 1
4.37 lndeno(1,2,3-cd)pyrene Concentration ug/L <0.07 1 <0.07 1
(193-39-5) Mass lb/day <0.02 1 <0.01 1
Isophorone Concentration ug/L <0.2 1 <0.2 1
4.38 (78-59-1) Mass lb/day <0.04 1 <0.03 1
Naphthalene ❑ ❑ ❑ Concentration ug/L <0.09 1 <0.09 1
4.39 (91-20-3) Mass lb/day <0.02 1 <0.02 1
Nitrobenzene Concentration ug/L <0.2 1 <0.2 1
4.40 (98-95-3) Mass lb/day <0.04 1 <0.03 1
N-nitrosodimethylamine ❑ 0 ❑ Concentration ug/L <0.4 1 <0.4 1
4.41 (62 75 9) Mass lb/day <0.09 1 <0.07 1
N-nitrosodi-n-propylamine Concentration ug/L <0.2 1 <0.2 1
4.42 (621-64-7) Mass lb/day <0.04 1 <0.03 1
N-nitrosodiphenylamine Concentration ug/L <0.09 1 <0.09 1
4.43 (86-30-6) Mass lb/day <0.02 1 <0.02 1
4.44 Phenanthrene Concentration ug/L <0.09 1 <0.09 1
(85-01-8) Mass lb/day <0.02 1 <0.02 1
Pyrene El
ug/L <0.2 1 <0.2 1
4.45 (129-00-0) Mass lb/day <0.04 1 <0.03 1
EPA Form 3510-2C(Revised 3-19) Page 18

Lr„iuentification Number NPDES Permit Number Facility rvame Outfall Number Form Appiuveu 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 002 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence Intake
(check one) Effluent (optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
Daily
Discharge Discharge Discharge Analyses Average Analyses
(required) (if available) Value
(if available) _
4.46 1,2,4-trichlorobenzene Concentration ug/L <0.2 1 <0.2 1
El III I:I
(120-82-1) Mass lb/day <0.04 1 <0.03 1
Section 5.Organic Toxic Pollutants(GCIMS Fraction-Pesticides)
5.1 Aldrin ❑ Concentration ug/L <0.00466 1 <0.00470 1
El I=1(309-00-2) Mass lb/day <0.00102 1 <0.00804 1
5.2 a-BHC 0 Concentration ug/L <0.0112 1 <0.0113 1
(319-84-6) Mass lb/day <0.00246 1 <0.00193 1
5.3 R-BHC ❑ Concentration ug/L <0.0429 1 <0.0432 1
El El
(319-85-7) Mass lb/day <0.00943 1 <0.00739 1
y-BHC ❑ ❑ Concentration ug/L <0.00485 1 <0.00489 1
5.4 (58-89-9) Mass lb/day <0.00107 1 <0.00084 1
b-BHC Concentration ug/L <0.0103 1 <0.0103 1
5.5 l El El
(319-86-8) ✓ Mass lb/day <0.00226 1 <0.00176 1
Chlordane 0 Concentration ug/L <0.216 1 <0.218 1
5.6 El El
(57-74-9) Mass lb/day <0.0475 1 <0.0373 1
4,4'-DDT 0 Concentration ug/L <0.00933 1 <0.00940 1
5.7 El El
(50-29-3) Mass lb/day <0.00205 1 <0.00161 1
4,4'-DDE ❑ ❑ ❑ Concentration ug/L <0.0187 1 <0.0188 1
5.8 (72-55-9) Mass lb/dav <0.00411 1 <0.00322 1
4,4'-DDD ❑ Concentration ug/L <0.00840 1 <0.08846 1
5.9 l El
(72-54-8) ✓ Mass lb/day <0.00185 1 <0.00145 1
Dieldrin 0 Concentration ug/L <0.00746 1 <0.00752 1
5.10 ✓l El
(60-57-1) Mass lb/day <0.00164 1 <0.00129 1
a-endosulfan ❑ Concentration ug/L <0.00280 1 <0.00282 1
5.11 (115-29-7) Mass lb/day <0.000615 1 <0.00048 1
EPA Form 3510-2C(Revised 3-19) Page 19

L.,,wentification Number NPDES Permit Number Facility iva,,,c Outfall Number Form ApN..03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 002 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence Intake
(check one) Effluent
(optional)
PollutantiParameter Testing Units i Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Daily of Term of
Discharge d Discharge) f available) Discharge Analyses AverageValue Analyses
(if available)
R-endosulfan Concentration ug/L <0.00914 1 <0.00921 1
5.12 (115-29-7) Mass lb/day <0.00201 1 <0.00158 1
5.13 Endosulfan sulfate Concentration ug/L <0.00933 1 <0.00940 1
El El 0
(1031-07-8) Mass lb/day <0.00205 1 <0.00161 1
5.14 Endrin Concentration ug/L <0.00840 1 <0.00846 1
El El El
(72-20-8) Mass lb/day <0.00185 1 <0.00145 1
Endrin aldehyde ❑ Concentration ug/L <0.00849 1 <0.00855 1
5.15 El El(7421-93-4) Mass lb/day <0.00187 1 <0.00146 1
Heptachlor ❑ 0 Concentration ug/L <0.00746 1 <0.00752 1
5.16 (76-44-8) Mass lb/day <0.00164 1 <0.00129 1 NCD 047 361
Heptachlor epoxide Concentration ug/L <0.00466 1 <0.00470 1
5.17 (1024 57 3) 0 0 0Mass lb/day <0.00102 1 <0.00804 1
PCB-1242 Concentration ug/L <0.0933 1 <0.0940 1
5.18 (53469 21 9) 0 0 0Mass lb/day <0.0205 1 <0.0161 1
PCB-1254 Concentration ug/L <0.0933 1 <0.0940 1
5.19 (11097 69 1) El 0 0Mass lb/day <0.0205 1 <0.0161 1
PCB-1221 Concentration ug/L <0.0933 1 <0.0940 1
5.20 (11104 28 2) 0 0 0Mass lb/day <0.0205 1 <0.0161 1
PCB-1232 Concentration ug/L <0.0933 1 <0.0940 1
5.21 (11141 16 5) ❑✓ 0 0Mass lb/day <0.0205 1 <0.0161 1
PCB-1248 Concentration ug/L <0.0933 1 <0.0940 1
5.22 (12672 29 6) El El ElMass lb/day <0.0205 1 <0.0161 1
PCB-1260 Concentration ug/L <0.0933 1 <0.0940 1
5.23 (11096 82 5) CI 0 0Mass lb/day <0.0205 1 <0.0161 1
PCB-1016 Concentration ug/L <0.0933 1 <0.0940 1
5.24 (12674-11-2) 0 0 0Mass lb/day <0.0205 1 <0.0161 1
EPA Form 3510-2C(Revised 3-19) Page 20

t'i Iaentification Number NPDES Permit Number Facility ivame Outfall Number Form Approves 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 002 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence Intake
(check one) Effluent (optional)
PollutantlParameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Daily of Term of
Discharge D Valueee
Discharge Analyses AAnalyses
(required) (f available) (if available)
Toxaphene Concentration ug/L <0.331 1 <0.334 1
5.25 (8001 35 2) 0 0 0
Mass lb/day <0.0727 1 <0.0571 1
1 Sampling shall be conducted according to sufficiently sensitive test procedures(i.e., methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I,subchapter N or 0. See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2C(Revised 3-19) Page 21

This page intentionally left blank.

trr{iuentification Number NPDES Permit Number Facility ivame Outfall Number Form Approvea 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 002 OMB No.2040-0004
TABLE C.CERTAIN CONVENTIONAL AND NON CONVENTIONAL POLLUTANTS(40 CFR 122.21(g)(7)(vi))1
Presence or Absence Intake
(check one) Effluent (Optional)
Units
Pollutant Maximum Long-Term
Believed Believed (specify) Maximum Daily Long-Term
Present Absent Discharge Monthly Average Daily Number of Average Number of
(required) Discharge Discharge Analyses Analyses
(if available) (if available) Value
❑ Check here if you believe all pollutants on Table C to be present in your discharge from the noted outfall.You need not complete the"Presence or Absence"column of Table C for
each pollutant.
❑
Check here if you believe all pollutants on Table C to be absent in your discharge from the noted outfall.You need not complete the"Presence or Absence"column of Table C for
each pollutant.
1 Bromide Concentration mg/L <1.3 1 <1.3 1
(24959-67-9) El El Concentration
lb/day <286 1 <222 1
2 Chlorine,total El ❑ Concentration mg/L 0.36 1 0.20 1
residual Mass lb/day 75 1 32 1
3. Color El
CP 35 1 45 1
Mass n/a
4. Fecal coliform El
col/dL 31 1 69 1
Mass n/a
5 Fluoride ✓❑ ❑ Concentration mg/L 0.5 0.5 0.2 7 0.5 1
(16984-48-8) Mass lb/day 114 114 41.7 7 86 1
Concentration mg/L 1.6 1.6 0.46 19 0.96 1
6 Nitrate-nitrite ❑✓ ❑ -
Mass lb/day 373 373 84.6 19 163 1
Nitrogen,total Concentration mg/L 6.2 6.2 0.57 19 <0.50 1
7' organic(as N) ❑✓ ❑
Mass lb/day 1231 1231 101 19 <86 1
Concentration mg/L <1.4 1 1.8 1
8. Oil and grease ❑✓ ❑
Mass lb/day <308 1 308 1
Phosphorus(as Concentration mg/L 2.0 2.0 0.7 19 <0.50 1
9' P),total(7723-14-0) ❑ Mass lb/day 399 399 123 19 <8.6 1
10. Sulfate(as SO4) a ❑ Concentration mg/L 32.1 1 11.5 1
(14808-79-8) Mass lb/day 7055 1 1967 1
Concentration mg/L <0.70 1 <0.70 1
11. Sulfide(as S) ❑� ❑ Mass lb/day <154 1 <120 1
EPA Form 3510-2C(Revised 3-19) Page 23

car iuentification Number NPDES Permit Number Facility are Outfall Number Form ApNiuv�u 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 002 OMB No.2040-0004
TABLE C.CERTAIN CONVENTIONAL AND NON CONVENTIONAL POLLUTANTS(40 CFR 122.21(g)(7)(vi))1
Presence or Absence Intake
(check one) Effluent (Optional)
Pollutant Units �- Maximum Long-Term
Believed Believed (specify) 1 Maximum Daily Long-Term
Present Absent Discharge Monthly Average Daily Number of Average Number of
Discharge Discharge Analyses Analyses
(required) Value
(if available) (if available)
12. Sulfite(as SO3) Concentration mg/L <2 1 <2 1
(14265-45-3) El ❑ Mass lb/day <419 1 <315 1
Concentration mg/L 0.046 1 0.070 1
13. Surfactants ❑✓ ❑
Mass lb/day 10 1 12 1
14. Aluminum,total ❑✓ 0 Concentration mg/L 0.222 1 <0.153 1
(7429-90-5) Mass lb/day 48.8 1 <26.2 1
15. Barium,total 0 0 Concentration mg/L 0.0235 1 0.0236 1
(7440-39-3) Mass lb/day 5.16 1 4.04 1
Boron,total ❑ El Concentration mg/L 0.0262 1 0.0267 1
16. (7440-42-8)
Mass lb/day 5.76 1 4.57 1
17. Cobalt,total El ❑ Concentration mg/L 0.00064 1 0.00045 1
(7440-48-4) Mass lb/day 0.14 1 0.077 1
18. Iron,total ❑✓ ❑ Concentration mg/L 1.05 1 0.807 1
(7439-89-6) Mass lb/day 231 1 138 1
19 Magnesium,total ❑✓ ❑ Concentration mg/L 2.79 1 2.93 1
(7439-95-4) Mass lb/day 613 1 501 1
Molybdenum, Concentration mg/L 0.00081 1 0.00079 1
20. total 0 ❑(7439-98-7) Mass lb/day 0.18 1 0.14 1
21. Manganese,total ❑✓ ❑ Concentration mg/L 0.121 1 0.103 1
(7439-96-5) Mass lb/day 26.6 1 17.6 1
22. Tin,total 0 ❑ Concentration mg/L <0.00060 1 <0.00060 1
7440-31-5
( ) Mass lb/day <0.13 1 <0.10 1
23. Titanium, total ❑✓ 0 Concentration mg/L 0.0078 1 <0.0051 1
(7440-32-6) Mass lb/day 1.7 1 <0.87 1
EPA Form 3510-2C(Revised 3-19) Page 24

L....,..ratification Number NPDES Permit Number Facility!mail,. Outfall Number Form Apv,,,..„03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 002 OMB No.2040-0004
TABLE C.CERTAIN CONVENTIONAL AND NON CONVENTIONAL POLLUTANTS(40 CFR 122.21(g)(7)(vi))1
Presence or Absence
(check one) i Effluent Intake
(Optional)
Pollutant Units Maximum Long-Term
Believed Believed (specify) Maximum Daily Monthly Average Daily Number of Long-Term Number of
Present Absent Discharge Discharge Discharge Analyses Average Analyses
(required) Value
(if available) (if available)
24. Radioactivity
• - • 1
Alpha. total ❑ ❑✓
Mass uCi/day <-37.1 1 <-29.9 1
Beta,total ❑ Concentration pCi/L 1.39 1 1.45 1
Mass uCi/day 146 1 116 1
Radium,total El ElConcentration pCi/L <1.39 1 <0.81 1
Mass uCi/day <146 1 <65 1
Radium 226,total ❑ 0 Concentration pCi/L 1.15 1 <0.57 1
Mass uCi/day 121 1 <45 1
1 Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I,subchapter N or 0. See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2C(Revised 3-19) Page 25

This page intentionally left blank.

L. .,i ,ntification Number NPDES Permit Number Facility INCH'IC Outfall Number Form App...—33/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 002 OMB No.2040-0004
TABLE D.CERTAIN HAZARDOUS SUBSTANCES AND ASBESTOS(40 CFR 12221(g)(7)(vii))1
Presence or Absence
Pollutant (check one) Reason Pollutant Believed Present in Discharge Available Quantitative Data
Believed Believed (specify units)
Present Absent -
1. Asbestos 0 ❑✓
2. Acetaldehyde ❑ ❑✓
3. Allyl alcohol ❑ ❑✓
4. Allyl chloride ❑ ✓❑
5. Amyl acetate ❑ ✓❑
6. Aniline ❑ ✓❑
7. Benzonitrile ❑ ✓❑
8. Benzyl chloride ❑ ❑✓
9. Butyl acetate ❑ ✓❑
10. Butylamine ❑ ❑✓
11. Captan ❑ ✓❑
12. Carbaryl ❑✓ ❑ May potentially be present in water intake.See attachment F9.3
13. Carbofuran ❑ ❑✓
14. Carbon disulfide ❑ ✓❑
15. Chlorpyrifos 0 ❑✓
16. Coumaphos ❑ ✓❑
17. Cresol 0 ✓❑
18. Crotonaldehyde ❑ ✓❑
19. Cyclohexane 0 ❑✓
EPA Form 3510-2C(Revised 3-19) Page 27

Err,i.ntification Number NPDES Permit Number Facility INCH Ile Outfall Number Form Appiv,,u J3/05/19
NC0003573 Chemours Fayetteville Works 002 OMB No.2040-0004
TABLE D.CERTAIN HAZARDOUS SUBSTANCES AND ASBESTOS(40 CFR 12221(g)(7)(vii))1
Presence or Absence
Pollutant (check one) Reason Pollutant Believed Present in Discharge Available Quantitative Data
Believed Believed , (specify units)
Present Absent
20. 2,4-D(2,4-dichlorophenoxyacetic acid) ✓❑ ❑ May potentially be present in water intake.See attachment F9.3
21. Diazinon p ❑ May potentially be present in water intake.See attachment F9.3
22. Dicamba ✓❑ ❑ May potentially be present in water intake.See attachment F9.3
23. Dichlobenil ❑ ❑✓
24. Dichlone ❑ ❑✓
25. 2,2-dichloropropionic acid ❑ ❑✓
26. Dichlorvos ❑ 0
27. Diethyl amine 0 ✓❑
28. Dimethyl amine 0 ❑✓
29. Dintrobenzene ❑ ❑✓
30. Diquat ❑ ✓❑
31. Disulfoton ❑ ✓❑
32. Diuron ❑✓ ❑ May potentially be present in water intake.See attachment F9.3
33. Epichlorohydrin ❑ ❑✓
34. Ethion ❑ ❑✓
35. Ethylene diamine 0 ❑✓
36. Ethylene dibromide ❑ ✓❑
37. Formaldehyde ❑✓ ❑ Used at Site,may potentially be present.See attachment F5&F8
38. Furfural 0 ❑✓
EPA Form 3510-2C(Revised 3-19) Page 28

L-, ,.ntification Number NPDES Permit Number Facility rvaine Outfall Number Form Apouv u 03/05/19
NC0003573 Chemours Fayetteville Works 002 OMB No.2040-0004
TABLE D.CERTAIN HAZARDOUS SUBSTANCES AND ASBESTOS(40 CFR 12221(g)(7)(vii))1
Presence or Absence
Pollutant (check one) Reason Pollutant Believed Present in Discharge Available Quantitative Data
Believed Believed (specify units)
Present Absent
39. Guthion ❑ p
40. Isoprene ❑ ✓❑
41. Isopropanolamine 0 ✓❑
42. Kelthane 0 ✓❑
43. Kepone ❑ ✓❑
44. Malathion ❑✓ ❑ May potentially be present in water intake.See attachment F9.3
45. Mercaptodimethur ❑ ✓❑
46. Methoxychlor ❑ ❑✓
47. Methyl mercaptan 0 ✓❑
48. Methyl methacrylate ❑✓ ❑ Used at Site,may potentially be present.See attachment F5
49. Methyl parathion ❑ ❑✓
50. Mevinphos ❑ El
51. Mexacarbate ❑ ❑✓
52. Monoethyl amine 0 ❑✓
53. Monomethyl amine 0 ✓❑
54. Naled 0 ✓❑
55. Naphthenic acid 0 ❑✓
56. Nitrotoluene ❑ ❑✓
57. Parathion 0 ❑✓
EPA Form 3510-2C(Revised 3-19) Page 29

Lr',,wentification Number NPDES Permit Number Facility Name Outfall Number Form Appruveu 03/05/19
NCD 047 368 642 N00003573 Chemours Fayetteville Works 002 OMB No.2040-0004
TABLE D.CERTAIN HAZARDOUS SUBSTANCES AND ASBESTOS(40 CFR 12221(g)(7)(vii))1
Presence or Absence
Pollutant (check one) Reason Pollutant Believed Present in Discharge Available Quantitative Data
Believed Believed (specify units)
Present Absent
58. Phenolsulfonate ❑ ❑✓
59. Phosgene ❑ ❑✓
60. Propargite 0 ✓❑
61. Propylene oxide 0 ✓❑
62. Pyrethrins ❑✓ ❑ Used at Site,may potentially be present.See attachment F8
63. Quinoline ❑ ✓❑
64. Resorcinol 0 ❑✓
65. Strontium ❑✓ ❑ May potentially be present in water intake.See attachment F9.3
66. Strychnine ❑ ❑✓
67. Styrene ❑✓ ❑ May potentially be present in water intake.See attachment F9.3
2,4,5-T(2,4,5-trichlorophenoxyacetic ❑ ❑
68. acid)
69. TDE(tetrachlorodiphenyl ethane) ❑ 0
70. 2,4,5-TP[2-(2,4,5-trichlorophenoxy) ❑ ❑
propanoic acid]
71. Trichlorofon 0 ✓❑
72. Triethanolamine ❑ ✓❑
73. Triethylamine ❑✓ ❑ Used at Site,may potentially be present.See attachment F5
74. Trimethylamine ❑ p
75. Uranium 0 ✓❑
76. Vanadium 0 ✓❑
EPA Form 3510-2C(Revised 3-19) Page 30

ErH iaentification Number NPDES Permit Number Facility Name Outfall Number Form Appruveu 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 002 OMB No.2040-0004
TABLE D.CERTAIN HAZARDOUS SUBSTANCES AND ASBESTOS(40 CFR 122.21(g)(7)(vii))1
Presence or Absence
Pollutant (check one) Reason Pollutant Believed Present in Discharge Available Quantitative Data
Believed Believed (specify units)
Present Absent
77. Vinyl acetate 0 ✓❑
78. Xylene ❑ ✓❑
79. Xylenol 0 p
80. Zirconium ✓❑ ❑ Used at Site,may potentially be present.See attachment F5
1 Sampling shall be conducted according to sufficiently sensitive test procedures(i.e., methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I, subchapter N or 0. See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2C(Revised 3-19) Page 31

This page intentionally left blank.

uuentification Number NPDES Permit Number Facility i.a Outfall Number Form J3/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works 002 OMB No.2040-0004
TABLE E.2,3,7,8 TETRACHLORODIBENZO P DIOXIN(2,3,7,8 TCDD)(40 C R 122.21(g)(7)(viii))
TCDD Presence or
Congeners Absence
Pollutant (check one) Results of Screening Procedure
Used or
Manufactured Believed Believed
Present Absent
Outfall sample was analyzed via Method 1613B"Dioxins and Furans(HRGC/HRMS)"with a result of no
2.3.7 8-TCDD El0 Q detectable 2,3,7,8-TCDD at an analytical reporting level of 9.5 pg/L.
EPA Form 3510-2C(Revised 3-19) Page 33

RECEIVED
NOV 3 0 2020
NCDEQIDWRINPDES
Attachment B. 1 — Line Drawing Water Balance

Cherrluurs Company- Fayetteville Works NPDES Permit No. Nuuuu3573
FORM 2C SECTION 2: LINE DRAWING
ATTACHMENT B.1
WATER BALANCE (Revised 10-15-2020) NPDES PERMIT RENEWAL APPLICATION
Chemours Company-Fayetteville Works
Flow Units: Gallons per Day NPDES Permit No.NC0003573
The overall flow basis was based on site flows from Dec 2017-May 2020. Chemours is proposing additional wastewater to the discharged to the wastewater treatment plant
and KurarayTrosifilOr, has changed its manufacturing operations from a wet process to a dry process which reduced cooling water river flows and wastewater flow
to the wastewater treatment plant.In addition DuPont plans to increase production with an increase in wastewater flow to the wastewater treatment plant.
In addition some small changes to other flow rates were made
—� Cape Fear River ______.----II, a
IriMiliall
NaOCI
iL4:kMA
E Sediment Filtered Water
w erns Removal FILTERED
1 WATER SYSTEM 980,285
NON-CONTACT WATER
ER WATE0. Atmosphere
COOLING enif WATER L�,rr�
Cech P oceess ii6'Yi 63,259_
iZl:R6L1 Dem ralized
water
♦ SEDIMENT —' l
I 218,150 I ♦�
BASINS --
DEMINERALIZED
WATER SYSTEM
•MILVIil.S[i ,1001e— Atmosphere I 36,400 I 30,000 I
Neutralized 1
♦Regenerate 1120,750f am< ..,.
,
PURCHASED + ♦36,000 KURARAY AMERICA
CHEMOURS
POTABLE .I 20,000I FLUOROPRODUCT TROSIFOL(R(POLYVINYL
AMERICANYL SENTRYG LAS'I DUPONT POLYVINYL
WATER I POWER BUTYRAL LAMINATE FLUORIDE RESIN
11 130,000 I •—i coo,mo MANUFACTURING
AREA PROCESSES MANUFACTURING MANUFACTURING PROCESSES
BOILERS PROCESS PROCESS
OILI :1:E SANITARY • - ,
FACILITIES AIR TOWERS 50,000 Oopoea +I
Disposal �,FUTURE,
OWER
COMPRESSORS IF'uTUREIi i
STORM- cOOUNG + 77 136,000
WATER 1 ♦ wgrER
RO Unit t 542 040
sro�«.arnam <.' 150,0001 1542,040I fgl
Process Areas I 7,200 I-"♦ i (FUTUREI ♦
I28,000 1
I Lam_.....►: I 44,2681
I (FUTURE)
♦
Alternate
Non- •
1 I , Future
]66,]OB Stormwate� + • r 1 :Diacherg. ,`
(FUTURE) Non-Contact Cooling Water
ill
4
P; OUTFACE
2 Candensmate Evaporation ACTIVATED CLARIFI- OUTFACE 3 I
002
and SLUDGE CATION ♦ 001 = 0
eiowd w DTP
j =
Evaporation I-2,000 I 342,B00 I
BIOSOLIDS
Bro.!.Moisture 4—I 1,000 h DRYING
Bro.!.
1 (Offsite Dispose()
November 2020

Attachment B.2 Outfall 001 Average Flows and
Treatment

Chemours Company-Fayetteville Works NPDES Permit No.NC0003573
ATTACHMENT B.2
Section 3. AVERAGE FLOWS AND TREATMENT (40 CFR 122.21(G)(3))
OUTFALL NUMBER 001
Esitmated Future Operation Contributing to Flow
Operation Average Flow
Kuraray Americas Inc.—Trosifol®Manufacturing Process' 0.025 MGD
Kuraray Americas Inc.—SentryGlas®Manufacturing Cooling Water 0.022 MGD
Kuraray Americas Inc.—SentryGlas®Manufacturing Process 0.003 MGD
DuPont Company—Polyvinyl Fluoride Manufacturing Processes2 0.136 MGD
Stormwater from Process Areas3 0.026 MGD
Sanitary(Domestic)Wastewater 0.020 MGD
Chemours Utilities(Demin Water Regenerate Flow&Air Comp Cooling 0.050 MGD
Water)
Chemours Reverese Osomisis(RO)Permeate4 0.028 MGD
Surface Evaporation from WWTP Operations —0.003 MGD _
Evaporation from Biosludge Drying Operation —0.002 MGD
Water Entrained in Off-site Disposal of Biosludge —0.001 MGD
OUTFALL 001 Estimated Flow 0.303 MGD
Thermal Oxidizer System effluents discharge(FUTURE) 0.040 MGD
OUTFALL 001 Estimated Flow(with Thermal Oxidizer System) 0.343 MGD
1)Due to Kuraray modifications to production facilities there will be a decrease in Kuraray's wastewater flows
and organic load to the wastewater treatment system. The modification to manufacturing operations is expected
to be completed January 1,2021.
2)DuPont increasing production such that expected wastewater flows to be 0.136 mgd.
3)All untreated IXM&Monomers secondary containment stormwater no longer discharges to the WWTP.
Chemours is requesting RO permeate which may contain stormwater to be discharged to the WWTP.
4)RO New wastewater proposed to be discharged to the WWTP.
November 2020

Chemours Company-Fayetteville Works NPDES Permit No.NC0003573
Code from Final Disposal of Solid or Liquid
Description (include size, flow rate through each Wastes Other Than by
treatment unit,retention time,etc.)
Table 2C-2 Discharge
Reversue Osmosis Permeate: 28,000 gpd Granular
Acticated Carbon Treatment Unit(Internal Outfall 103) 2-A
FUTURE: Thermal Oxidizer Wastewater Treatment:
28,800 gpd Water Scrubber Treatment lime
neutralization,crystallization,pressure filtration: 2880 2-A,2-C, 2-K, 5-R Filter Solids Off-site Landfill
gpd Caustic Scrubber pH neutralization and 40,000 gpd
Granular Activate Carbon Treatment Unit(FUTURE
Internal Outfall 102)
Equalization Basin: 850,000 gal. surface impoundment
for mixing and aeration. Approx. 0.589 MGD flow, 1-0, 3-E
approx. 34-hour retention time
Emergency Retention Tank: 175,000 gallon tank for
controlled mixing of untreated wastewater 1-0
Aeration Tank(formerly the Pre-Digester Tank):
250,000 gallon tank for aeration and initial biological
3-E
treatment. Approx. 0.589 MGD flow, approx. 10-hour
retention time
Clarification: 119,000-gal, 168,000-gal, and 679,000-gal.
clarifiers, operated in parallel. Approx. 1.597 MGD flow,
approx. 10-hour retention time for the 679,000-gal 1-U
clarifier
SLUDGE TREATMENT AND DISPOSAL PROCESSES
Dissolved Air Flotation: Estimated Approx. 5,000 lb/day
wet sludge 5 J
Rotary Filter: Estimated Approx. 5,000 lb/day wet sludge 5-C
Screw Filter Press: Estimated Approx. 2,000 lb/day wet
sludge S-R
Steam-Heated Dryers: Approx. 500 lb/day dry sludge 5-M
Disposal: Approx. Estimated 500 lb/day dry sludge 5-Q Off-site Landfill
November 2020

Attachment B.3 Outfall 002 Average Flows and
Treatment

Chemours Company-Fayetteville Works NPDES Permit No.NC0003573
ATTACHMENT B.3
SECTION 3. AVERAGE FLOWS AND TREATMENT (40 CFR 122.21(g)(3))
OUTFALL NUMBER 002
Operations Contributing to Flow
Operation Average Flow
River Sediment Basin water overflow 0.045 MGD
Stormwater from Non-Process Areas 0.355 MGD
Boiler blowdown and condensate 0.119 MGD
Chemours Fluoroproducts Mfg. Processes non-contact cooling water 0.542 MGD
Chemours Cooling Tower Blowdown 0.007 MGD
Kuraray Trosifol(R) Manufacturing Process non-contact cooling water 0.067 MGD
Kuraray SentryGlas(R) Manufacturing Process non-contact cooling water 0.039 MGD
DuPont Polyvinyl Fluoride Resin Processes non-contact cooling water 0.048 MGD
DuPont Polyvinyl Fluoride Resin Processes RO/CDI reject water 0.044 MGD
Outfall 001 Estimated Effluent Long-term Average Flow * 0.303 MGD
Non-contact River Water Once-through Cooling Water 16.397 MGD
ANTICIPATED OUTFALL 002 LONG-TERM AVERAGE FLOW* 17.967 MGD
*Estimated Flow See Outfall 001 Future and Proposed Operations Contributing to Flow
Treatment Units
Code from Final Disposal
Description (include size, flow rate through each treatment unit, retention of Solid or
time,etc.) Liquid Wastes
Table 2C-2 Other Than by
Discharge
Outfall 002: Final effluent discharge to Cape Fear River. Approx. 21 MGD
average flow 4-A
Chemours process wastewater disposed off-site as a non-hazardous solid waste. Off-site disposal
4-D at non-North
Approx. 0.050 MGD. Carolina facility
November 2020

Attachment B.4 Stormwater Runoff Estimation

Chemours Company-Fayetteville Works NPDES Permit No.NC0003573
Stormwater Runoff Estimation for the period Dec-2017 through May-2019
Precipitation at Fayetteville Regional Airport(FAY)
Precipitation (Sources: National Weather Service and US Climate Data)
Dec 2017 3.69 inches 31 days Source: U.S.climate data[www.usclimatedata.com/climate/north-carolina/united-states/3203]
Jan-Dec 2018 58.66 inches 365 days Source: National Weather Service [www.weather.gov/rah/2018kfay]
Jan-May 2019 13.69 inches 151 days Source: National Weather Service[https://w2.weather.gov/climate/index.php?wfo=rah]
TOTALS 76.04 total inches 547 total days
AVERAGE 0.1390 inches/day
STORMWATER RUNOFF ESTIMATION
Process Area Stormwater Runoff to Chemours WWTP and Outfall 001 (estimated)
Process Areas which drain to the
Wastewater Treatment Plant
(estimated approximate acreages)
Process Areas Acres (Source: Bladen County(NC)Connect GIS mapping) https://bladen2.connectois.com/Map.aspx
FPS/IXM 0.00 NOTE:Stormwater from FPS/IXM hauled off-site
PPA/SentryGlas 0.00 NOTE: All areas are estimated approximations
PVF 1.45 Stormwater from FPS/IXM no longer discharges to the VWVfP
Trosifol 3.11
WWTP 2.17
Power 0.60
TOTAL 7.33 acres
7.33 acres of drainage to Chemours WWTP and Outfall 001 (estimated approximation)
43,560 sq.ft/acre
319,224 sq.ft of drainage to Chemours VWVTP and Outfall 001 (estimated approximation)
0.1390 inches rainfall per day longterm average(Dec 2016-May 2019)
0.0116 feet rainfall per day longterm average(Dec 2016-May 2019)
3,698 cubic feet rainfall per day longterm average (Dec 2016-May 2019)
7.4805 gallons/cubic foot
27,663 gallons rainfall per day longterm average (Dec 2016-May 2019)
0.95 Run-off coefficient for asphalt and concrete surfaces
(Source: NCDEQ Stormwater Design Manual,Table 1:Rational Runoff Coefficients by Land Use)
26,280 gallons rainfall per day to Chemours WWTP and Outfall 001 (estimated)
Non-Process Area Stormwater Runoff directly to Outfall 002 (estimated)
0.1390 inches rainfall per day longterm average(Dec 2016-May 2019)
0.0116 feet rainfall per day longterm average(Dec 2016-May 2019)
283.00 total acres of drainage to Outfall 002 (estimated approximation) (Source: Bladen County(NC)Connect GIS mapping)
7.33 process acres of drainage to Outfall 001 or hauled off-site(estimated appr https://bladen2 conneciais.com/Map.aspx
275.67 acres of drainage directly to Outfall 002 (estimated approximation)
43,560 sq.ft./acre
12,008,256 sq.ft.of drainage to Outfall 002 including future Thermal Oxidizer/Cooling Water Towers areas (estimated approximation)
10,396 sq.ft.of future Thermal Oxidizer/Cooling Water Towers reported separately (estimated approximation)
11,997,860 sq.ft.of drainage to Outfall 002 excluding future Thermal Oxidizer/Cooling Water Towers areas (estimated approximation)
138,988 cubic feet rainfall per day longterm average (Dec 2016-May 2019)
7.4805 gallons/cubic foot
1,039,703 gallons rainfall per day longterm average (Dec 2016-May 2019)
0.35 Run-off coefficient for unimproved areas
(Source: NCDEQ Stormwater Design Manual,Table 1:Rational Runoff Coefficients by Land Use)
363,896 gallons rainfall per day(non-process areas)runoff directly to Outfall 002 (estimated approximation)
Stormwater Runoff from the Thermal Oxidizer and Cooling Water Tower areas directly to Outfall 002 (Future stormwater runoff)
10,396 sq.ft.of Thermal Oxidizer and Cooling Water Towers impervious surface (Source: Email from J.B. Ruiter,June 18,2019)
0.1390 inches rainfall per day longterm average(Dec 2016-May 2019)
0.0116 feet rainfall per day longterm average(Dec 2016-May 2019)
120 cubic feet rainfall per day longterm average (Dec 2016-May 2019)
7.4805 gallons/cubic foot
901 gallons rainfall per day longterm average (Dec 2016-May 2019)
0.95 Run-off coefficient for asphalt and concrete surfaces
(Source: NCDEQ Stormwater Design Manual,Table 1:Rational Runoff Coefficients by Land Use)
856 gallons rainfall per day runoff directly to Outfall 002 (estimated approximation)
856 gallons rainfall per day runoff directly to Outfall 002 (estimated approximation)
144 gallons wash-down per day directly to Outfall 002 (estimated)
1,000 gallons per day of stormwater runoff and wash-down directly to Outfall 002 (estimated)
November 2020

Attachment B.5. 1 Future Biological Wastewater
Treatment Facility Management

Chemours Company—Fayetteville Works NPDES Permit No.NC0003573
ATTACHMENT B.5.1
FUTURE BIOLOGICAL WASTEWATER TREATMENT FACILITY MANAGEMENT
Process wastewater and stormwater from the various manufacturing areas are collected in the
respective area sumps and ultimately conveyed via a gravity flow underground process sewer pipe
to the facility's central wastewater treatment plant ("WWTP"). Sanitary sewage is conveyed via
a separate underground sewer system to the WWTP. The permitted maximum flowrate of the
WWTP effluent at Outfall 001 is 2.0 million gallons per day (MGD), while the actual average
flowrate of Outfall 001 was approximately 0.534 MGD during the period from December 1,2017
through May 31, 2019. During this period of time, approximately 0.050 MGD of Chemours'
process wastewater is captured and disposed of at off-site commercial disposal facilities.
Kuraray has modified its manufacturing operation such that the organic load and wastewater flow
rates will be significantly reduced. (See attachment B.2 for the wastewater treatment flow rates
associated with Outfall 001 and see Attachment B-2-1 Fayetteville Wastewater Management and
Treatment System - Engineering Report and Basis of Design for Phase I Modifications for
modifications to the Wastewater Treatment System).
The untreated process and sanitary wastewaters are commingled in the WWTP Influent Sump
where it is pumped to an 850,000-gallon Equalization Basin. The Equalization Basin is mixed
with two floating submerged mixers. Three floating surface aerators in the basin cool and aerate
the incoming wastewater.
A 175,000-gallon Emergency Retention Tank is available for temporary storage of untreated
wastewater which may need additional treatment or acclimation in the WWTP activated sludge
process at a controlled rate that allows for proper biological treatment.
Untreated wastewater from the Equalization Basin is to be pumped to a 250,000-gallon Aeration
Tank (formerly the Predigester Tank) in which the biological degradation of organics will occur.
The Aeration Tank (formerly the Predigestor Tank) is aerated primarily by a diffused air system
located in the bottom of the tank.Note the Predigester Tank is to be modified/converted to operate
as the main aeration tank due to reduced organic load and overall wastewater flows. (See
Attachment B-2-1 Fayetteville Wastewater Management and Treatment System - Engineering
Report and Basis of Design for Phase I Modifications for more details on biological wastewater
treatment plant modifications).
The biologically treated wastewater will then be sent to one of two in-ground clarifiers (119,000
gallons and 168,000 gallons respectively) or an above-ground 679,000-gallon clarifier; with all
clarifiers being operated in parallel. The clarified treated effluent is discharged to and through
Outfall 001.
The wasted activated sludge is sent to a Dissolved Air Floatation (DAF) unit, then to a 47,000
gallon Sludge Storage Tank, and finally to a Rotary Filter for thickening. The thickened sludge is
dewatered in a Sludge Press, and can be dried in a steam-heated dryer for additional moisture
removal. The dewatered sludge or dewatered/dried sludge is transported off-site to a commercial
Subtitle C or Subtitle D landfill.
1 November 2020

Chemours Company—Fayetteville Works NPDES Permit No. NC0003573
Non-contact process cooling water and non-process stormwater are conveyed via surface ditches
that flow to Outfall 002,which is the facility's final permitted discharge outfall. In addition,excess
river water flow and the treated Outfall 001 effluent are discharged directly to a surface ditch. The
combined, total flow of water from the site is discharged through and monitored at Outfall 002.
The discharged treated wastewater is conveyed via an underground pipe to the Cape Fear River,
where it enters the river at a point approximately 1,500 feet upstream of the William O. Huske
Lock& Dam, also known as Lock& Dam No. 3.
2 November 2020

Attachment B.7 Analytical Laboratories

Chemours Company—Fayetteville Works NPDES Permit No.NC0003573
ATTACHMENT B.7
ANALYTICAL LABORATORIES USED FOR ONE TIME ANALYSIS
FOR NPDES 2C APPLICATION
Pace Analytical Services
1638 Roseytown Road, Suites 2,3 & 4,
Greensburg, PA 15601
724-850-5600
• Gross Alpha
• Gross Beta
• Radium-226
• Radium-228
Microbac
Fayetteville Division
2592 Hope Mills Road
Fayetteville NC 28306
[phone]
• Coliform, Fecal
• Chlorine Residual, Total
• Temperature
• pH
• Sulfite (analysis subbed to Pace Analytical (Huntersville))
Eurofins Test America-Knoxville
5815 Middlebrook Pike
Knoxville,TN 37921
[phone]
• 2,3,7,8-TCDD
Eurofins Lancaster
2425 New Holland Pike
Lancaster,PA
[phone]
• BOD5, COD, TOC, TSS Ammonia,
• Metals, Cyanide and Total Phenols (Table B-1)
• Organic Toxic Pollutants(GC/MS Fraction-Volatile Organic Table B-2)
• Organic Toxic Pollutants (GC/MS Fraction-Acid Compounds B-3)
• Organic Toxic Pollutants (GC/MS Fraction-Base/Neutral Compounds Table B-4)
• Organic Toxic Pollutants (GC/MS Fraction-Pesticides Table B-5)
• Certain Conventional and Non=Conventional Pollutants(Table C)except sulfite
1 November 2020

Chemours Company—Fayetteville Works NPDES Permit No.NC0003573
ATTACHMENT B.7
ANALYTICAL LABORATORIES USED FOR ROUTINE NPDES PERMIT ANALYSIS
TBL
2401 West 5th Street
Lumberton,NC 28358
[phone]
• BOD. TOC, COD TSS,
• Fluoride
• Nitrate-Nitrogen
• Total Nitrogen
• Total Phosphorus
• Oil and Grease
MERITECH,INC. (LAB #027)
642 Tamco Rd.
Reidsville,NC 27320
[phone]
• Whole Effluent Toxicity Testing
TEST AMERICA—DENVER
4955 Yarrow St.
Arvada, CO 80002
[phone]
• PFOA
• HFPO-DA
Pace Analytical
12065 Lebanon Rd
Mount Juliet, TN 37122
[phone]
• Mercury
• PFAS,VOC, Metals for the Reverse Osmosis Permeate
TBL Environmental
2401 W. 5th Street
Lumberton,NC 28358
[phone]
• BOD5 for the Reverse Osmosis Permeate
2 November 2020

Chemours Company—Fayetteville Works NPDES Permit No.NC0003573
ATTACHMENT B.7
ANALYTICAL LABORATORIES USED TO ANALYZE PFAS COMPOUNDS
TABLE 3+AND EPA METHOD 537 MODIFIED
FOR DATA SUPPLIED IN THE NPDES PERMIT APPLICATION
Kerri Sachtleben
Senior Project Manager
Eurofins Lancaster Laboratories Environmental LLC
2425 New Holland Pike
Lancaster, PA 17601
[phone]
• PFAS EPA Method 537 Modified (See attachment B.9)
• PFAS Table 3+ (See attachment B.9)
Michelle Johnston
Project Manager
Eurofins Test America
4955 Yarrow Street
Arvada, CO 80002
303-736-0110
• HFPO-DA
• Shorter PFAS list by 537 Mod. but not Table 3+.
Perfluorobutane Sulfonate (PFBS)
Perfluorobutanoic acid(PFBA)
Perfluorodecane sulfonate (PFDS)
Perfluorodecanoic acid (PFDA)
Perfluorododecanoic acid(PFDoA)
Perfluoroheptanoic acid(PFHpA)
Perfluorohexane Sulfonate (PFHxS)
Perfluorohexanoic acid (PFHpA)
Perfluorononanoic acid (PFNA)
Perfluorooctane Sulfonate (PFOS)
Perfluorooctanoic acid(PFOA)
Perfluoropentanoic acid(PFPA)
Perfluorotetradecanoic acid(PFTeA)
Perfluorotridecanoic Acid(PFTriA)
Perfluoroundecanoic acid(PFUnA)
Perfluorooctane Sulfonamide (FOSA)
3 November 2020

Chemours Company—Fayetteville Works NPDES Permit No.NC0003573
Eurofins TestAmerica
880 Riverside Parkway
West Sacramento, CA 95605
[phone]
• PFAS EPA Method 537 Modified (See attachment B.9)
• PFAS Table 3+ (See attachment B.9)
See Attachment B.10 for specific PFAS compounds listed for Table 3+and EPA Method 537
modified.
4 November 2020

Chemours Company—Fayetteville Works NPDES Permit No.NC0003573
ATTACHMENT B.7
ANALYTICAL LABORATORIES USED TO ANALYZE PFAS COMPOUNDS
TABLE 6+FOR DATA SUPPLIED IN THE NPDES PERMIT APPLICATION
Michelle Johnston
Project Manager
Eurofins TestAmerica
955 Yarrow Street
Arvada, CO 80002
[phone]
• PMPA
• PEPA
Kerri Sachtleben
Senior Project Manager/Group Leader
Eurofins Lancaster Laboratories Environmental LLC
2425 New Holland Pike
Lancaster,PA 17601
[phone]
• PMPA
• PEPA
5 November 2020

Attachment B. 11 Wastewater Management & Treatment
System: Engineering Report &
Basis of Design for Phase I Modifications Report "NEW"

Chemours
Chemours Fayetteville Works
22828 NC Highway 87 W
Fayetteville,NC 28306
WASTEWATER MANAGEMENT & TREATMENT
SYSTEM
ENGINEERING REPORT & BASIS OF DESIGN
FOR PHASE 1 MODIFICATIONS
Document No. Click here to enter document number.
Revision Date Description Prepared Checked
By: By:
A 09/24/20 Phase 1 Engineering Report&Design Basis TJW RAO
B 10/08/20 Updated per review comments TJW
AECOM
AECOM Project Number: 60637192

AECOM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
TABLE OF CONTENTS
1 INTRODUCTION 4
1.1 Background 4
1.2 System Description and Overview 4
1.3 Anticipated Changes to Wastewater Generating Activities 7
1.4 Approach to System Modifications 7
1.5 Phase 1 Engineering Report Objective 8
2 Phase 1 8
2.1 Assumptions 8
2.2 Analysis of Wastewater Quality From Contributing Sources 8
2.3 Discharge Limits 10
2.4 Phase 1 Mass Balance 10
2.5 WWTP Design Basis 11
3 Phase 1 SYSTEM Description 14
3.1 Wastewater Equipment 14
3.2 Summary of Improvements 22
4 Operating Philosophy 24
5 Codes, Standards. and Specifications 26
6 Considerations for Phase 2 27
7 Statement of Limitations 27
List of Tables
Figure 1: Aerial View of Chemours Wastewater Treatment System, Fayetteville, NC 5
Figure 2: Existing Wastewater Treatment Process Diagram 6
Table 2.1 Future Process Wastewater Stream Characteristics 9
Table 3.1 Collection Sump Characteristics 15
Table 3.2 Equalization Basin Characteristics 15
Table 3.3 Pre-Digestion Tank Characteristics 17
Table 3.4 Clarifier#3 Characteristics 19
Table 3.5 Supplemental BOD Feed System 20
Table 3.6 Supplemental Nitrogen Feed System 20
Table 3.7 Supplemental Phosphorus Feed System 21
Table 3.8 Summary of Phase 1 Improvements 23
AECOM Project# 60637192 Page 1

AECOM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
List of Figures
Figure 1: Aerial View of Chemours Wastewater Treatment System, Fayetteville, NC 5
Figure 2: Existing Wastewater Treatment Process Diagram 6
Figure 3: Phase 1 Process Wastewater Mass Balance (BOD) 10
Figure 4: Phase 1 Process Wastewater Mass Balance (TSS) 11
Figure 5: Phase 1 Process Wastewater Operations Analysis 13
Figure 6: Phase 1 Process Flow Diagram 14
Figure 7: Redline of PID W1203664 16
Figure 8: Redline of PID W1203664 18
Attachments
Attachment A: Mass Balance Calculations
AECOM Project# 60637192 Page 2

AECOM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
Abbreviations
Percent
Degrees Fahrenheit
°C Degrees Celsius
BOD Biological / Biochemical oxygen demand
cf Cubic feet
cfm Cubic feet per minute
cfs Cubic feet per second
EQ Equalization
Ft Foot or feet
fps Foot per second
gpm Gallons per minute
gpd Gallons per day
HRT Hydraulic residence time
lb/cf Pounds per cubic foot
PPD Pounds per day
lb/gal Pounds per gallon
mg/L Milligrams per liter
µg/L Micrograms per liter
MLSS Mixed liquor suspended solids
NCCW Non-contact cooling water
OCPSF Organic chemical, pesticide, synthetic fiber
ppm Parts per million
psi Pounds per square inch
RAS Return Activated Sludge
SRT Solids retention time
S.U. Standard units
TDS Total dissolved solids
TSS Total suspended solids
WAS Waste Activated Sludge
WWTP Wastewater Treatment Plant
AECOM Project# 60637192 Page 3

AECOM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
1 INTRODUCTION
1.1 Background
Chemours owns and operates the Fayetteville Works Plant located in Bladen County, North
Carolina along the Cape Fear River. The Fayetteville Works Plant consists of Chemours
Manufacturing Operations (Chemours), which acts as the landlord, along with DuPont (DuPont)
and Kuraray Manufacturing Operations (Kuraray), which both act as tenants.
Chemours operates a biological treatment system to treat wastewater generated by Organic
Chemical, Pesticide, and Synthetic Fiber (OCPSF) regulated manufacturing operations. Effluent
from the treatment system is discharged to Cape Fear River under North Carolina's Discharge
Elimination System (NPDES) Permit Number NC0003573.
1.2 System Description and Overview
The biological treatment system generally consists of collection piping, equalization (EQ) storage,
treatment components, and dewatering/drying equipment. The wastewater treatment plant
(WWTP) was built in approximately 1968, was upgraded in the mid-1980's, and has had various
component modifications throughout the decades of operation. The current WWTP consists of
the following equipment:
• Collection piping routed to a collection sump;
• Equalization basin;
• Retention tank;
• Pre-digester tank;
• Aeration tank with nutrient feed capability (ammonia and phosphoric acid);
• Clarifiers (1 in use, 2 spares);
• DAF unit (used as part of solids management, currently shut down);
• Rotary drum filters (used as part of solids management, as needed);
• Screw press; and
• Steam heated sludge dryers, as needed .
The site layout of the WWTP area is shown in Figure 1.
AECOM Project# 60637192 Page 4

AECOM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
Wastewater Treatment Opreatlons Aeration Legend
# Clarifier R3
I t
• Pre digester
...�
lank .��.� Ir
4 •
amokClarifier Itl •
1" y r t 4
, Clarifier in
•
Solids Dewatering: fitRotary Drums,Screw
press,Steam heated
sludge dryers ' _ Fqualiraikm Ravin
a • .
Figure 1:Aerial View of Chemours Wastewater Treatment System,Fayetteville,NC
The biological treatment system is operated as a continuous flow activated sludge system:
wastewater from the onsite manufacturing activities as well as sanitary flow is captured in the
collection sump, which is then transferred through the treatment system. During periods of excess
flow, surplus wastewater can be transferred and stored in the retention tank, which then can be
drained back to the system when the peak flow subsides.
WWTP influent flow over the past several years has steadily reduced due to changes in operations
at the Fayetteville site. The average flow rate through the treatment system based on data for the
period of January 1. 2018 through December 31, 2019. was approximately 555.000 gpd. Further
reductions in flow are anticipated due to other changes in the operations at the site.
A schematic overview of the current wastewater treatment system is shown as Figure 2 below.
AECOM Project# 60637192 Page 5

AECOM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
Plant Domestic&Process Retention
Wastes Tank Ammonia
Tank
Collection Sump P. Equalization Basin Pm-Digester Tank Aeration Tank
To Atmosphere 4 ---- Scrubber 1
Truck solid to landfill 4----- Drying a—--- Screw Press 4 Rotary Drums Clarifier Tanks
Send Effluent to River
Figure 2:Existing Wastewater Treatment Process Diagram
Details of existing major equipment of the treatment process are summarized below:
• One (1) 850,000 gallon Equalization Basin, which includes three floating mechanical
aerators and two floating mixers; mixers use is adjusted seasonally as required to balance
process needs with energy conservation.
• One (1) 250.000 gallon Pre-digester Tank, which includes one 420 cfm blower;
• One (1) 1,700,000 gallon Aeration Tank, which includes three blowers:
o Blower A, which has a 4,000 cfm capacity and variable speed drive.
o Blower B, which has a capacity of 4,000 cfm and serves as a back-up blower.
o Blower C, which has a capacity of 1,500 cfm and is used for supplemental air.
• Three (3) Clarifier units for solids capture and thickening, which includes:
o One (1) 685,000 gallon Clarifier 3, which is the primary operating unit.
o One (1) 119,000 gallon Clarifier 1, which is used as a back-up clarifier.
o One (1) 117,000 gallon Clarifier 2, which is used as a back-up clarifier.
• Miscellaneous pumps used to transfer fluids between processes.
• Rotary drums, screw press, and steam heated sludge dryer equipment housed in the on-
site sludge building.
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AECOM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision 6
1.3 Anticipated Changes to Wastewater Generating Activities
There are planned changes in manufacturing production at the facility which will directly impact
the wastewater treatment processes.
• Kuraray is implementing a significant change in their manufacturing process in the
second half of 2020, which will result in a significant curtailment of flow and biological
(also referenced as biochemical) oxygen demand (BOD) load to the wastewater
process.
• Chemours has installed a new thermal oxidizer water scrubber and caustic scrubber,
which will be a new contribution to the wastewater system. The discharge is expected to
have elevated Total Dissolved Solids (TDS) and periodically have concentrations of
sulfite up to 1.5%.
• Chemours has been piloting a process water reuse system, which utilizes reverse
osmosis technology to treat and recycle waters within the manufacturing operations. It is
anticipated that the water reuse system will purge a portion of the recycle loop to the
wastewater plant as required to maintain water quality specifications for total dissolved
solids and total organic carbon The frequency of the purge is currently not known but
can occur daily. This stream will be a new source for the wastewater system. The full
commissioning of the reuse system is anticipated to occur in late 2020.
• DuPont anticipates increases in onsite production in 2022, which will result in full
utilization of both of its manufacturing lines. This is expected to increase wastewater
generation and discharge to the onsite wastewater system above the previous average
values'.
As a result of the changes in site operations, both the hydraulic flow and wastewater strength
(primarily BOD load) are expected to be significantly reduced, from an approximate average of
550,000 gallons per day (gpd) with 3,300 pounds per day (ppd) of BOD to approximately
346,000 gpd with 89 ppd of BOD. This represents an approximate 44% reduction in hydraulic
load, but more importantly, a greater than 97% reduction in BOD. The existing wastewater
systems and process operations are significantly oversized for the future conditions and require
modifications to achieve a more sustainable solution.
1.4 Approach to System Modifications
AECOM completed a Phase 1 (short term_ assessment of the wastewater system in March
20200nce Phase 1 is completed a Phase 2 (long term) evaluation will be completed.
• Phase 1: In order to complete changes within the timeframe necessary to meet the
adjustments in onsite manufacturing operations, the existing wastewater system should
be reconfigured to utilize alternative components of the infrastructure (specifically, the
Pre-Digestion Tank) as the bioreactor in lieu of the Aeration Basin. The system
operations will also be adjusted to reflect conditions that would be similar to an oxidation
ditch, with hydraulic retention times between 18-36 hours and sludge age of 20-30 days.
This will reduce the mass of bacteria in the system to more closely align with the BOD
load. Even with these adjustments, sustainable operation may require periodic input of
Review of 2019 records indicates that DuPont operated at 62.5%of the available capacity at the facility
AECOM Project# 60637192 Page 7

A.ECOM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
supplemental BOD to support sustained operations. The water surface elevation in the
Pre-Digestion tank may be adjusted to further reduce the overall bacterial mass, but this
will need to be balanced against the required hydraulic retention time and submergence
requirements for the aeration blowers.
• Phase 2: As a longer-term solution, the influent sources to the WWTP will be scrutinized
against OCPSF guidelines in the upcoming months.
1.5 Phase 1 Engineering Report Objective
The objectives of this Engineering Report are to summarize and document the evaluations of
the Fayetteville current and future operations, provide a design basis for the Phase 1
modifications. This includes:
1. Identify project assumptions, conditions, and criteria used in the analysis.
2. Summarize the process analysis used to identify the wastewater system requirements
for Phase 1.
3. Define the criteria and conditions to meet the system requirement in Phase 1.
4. Provide the scope of the system modifications for Phase 1.
2 PHASE 1
2.1 Assumptions
The following assumptions have been made to develop the conditions for future system
operations and configurations:
• The future wastewater will contain a sufficient BOD fraction to maintain a viable
biological treatment system. In the event that the BOD quantity in the wastewater
generated on site is insufficient, supplemental BOD sources will be available and used
as required to maintain the treatment system.
• The ratio of BOD to COD is anticipated to change in the future wastewater. but the
biological system will be able to adapt to these conditions.
• There will not be new compounds discharged to the wastewater system that could
negatively impact the biological community within the treatment system.
• Residuals generated from the wastewater operations in the future will be similar in
characteristics to the current sludge, such that the existing clarifier, pumps, and sludge
processing equipment (screw press) will be appropriate and suitable for use in the
revised process.
2.2 Analysis of Wastewater Quality From Contributing Sources
A series of sampling and laboratory analyses were used to establish properties as the basis of
design for fluids to be used in the treatment processes for Phase 1. Table 2.1 provides a
summary of physical characteristics of the wastewater streams for use in the preliminary design,
assuming future operating conditions. The information in Table 2.1 will be used to appropriately
size the process and mechanical systems for the operating conditions.
AECOM Project# 60637192 Page 8

.COM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
Table 2.1 Future Process Wastewater Stream Characteristics
1
DuPont Chemours
r
Recycle
Vacuum Thermal Process
PVF-1/2 Pum• Quench Tank Oxidizer Stormwater Water Demin Water
Pro•ert Avg Max Avg Max Avg Max Avg Max Avg Max Avg Max Avg Max Avg Max
Flow (gpd) 136,000 136,000 21,600 21,600 2,880 2,880 21,600 21,600 40,000 40,000 26,000 26,000 28,000 28,000 50,000 50,000
BOD5 (mg/L) 5.59 33.30 2.00 2.00 1,667 2,200 4.28 14 2.68 6.10 N/A N/A 9.82 23.60 4.68 6.80
COD (mg/L) 563 5.390 30 30 5,190 6,950 40 68 30 30 N/A N/A 106 130 89 125
TSS (mg/L) 349 2,084 162 171 219 270 3.6 5.1 26.8 77.3 N/A N/A 3.2 5.0 45.1 70
TOC (mg/L) N/A N/A N/A N/A 987 1,050 N/A N/A N/A N/A N/A N/A 32.7 39.8 N/A N/A
Ammonia 0.36 1.67 0.10 0.10 1.0 2.2 0.10 0.10 0.10 0.10 N/A N/A 0.30 0.56 0.45 0.56
(mg/L as N)
Nitrate+Nitrite 0.24 0.57 0.61 0.81 0.03 0.04 0.02 0.02 4.62 7.66 N/A N/A 0.02 0.03 4.71 7.09
(mg/L as N)
Total
Phosphorus 0.22 0.37 0.14 0.31 0.09 0.16 0.12 0.31 0.15 0.35 N/A N/A 0.14 0.40 1.20 6.26
(mg/L) -
Conductivity 72.7 81 144 147 394 409 10.1 11 1,941 6,200 N/A N/A 11.96 20 4,388 8,800
(µmhos/cm) -- -
Temperature 98.0 118.4 118.4 122.0 NS NS 65.3 66.2 93.5 102.2 N/A N/A 93.2 96.8 92.6 95
(F)
pH (s.u.) 5.0 5.9 6.0 6.7 NS NS 4.0 4.8 8.1 9.9 N/A N/A 8.3 9.5 9.0 9.7
In addition to process wastewater, the site generates approximately 20,000 gallons per day of sanitary wastewater. This stream is
assumed to have an average BOD concentration of 220 mg/L, which equates to an additional contribution of 36.8 ppd of BOD load to
the WVVTP.
AECOM Project# 60637192 Page 9

ALICOM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
2.3 Discharge Limits
Chemours is currently in the process of completing a permit modification to reflect changes at
the facility to adjust permit limits as regulated by the Organic Chemicals, Pesticides, and
Synthetic Fiber (OCPSF) Category, 40 CFR 414 Subpart D (414.41). The amended permit
requirements will be incorporated in the future WWTP operations.
2.4 Phase 1 Mass Balance
The information in Section 2 has been used to complete mass balance calculations, which are
intended to serve as the design basis for equipment sizing and operating conditions for the
treatment systems. Figures 3 (BOD) and 4 (TSS) presents the average mass balance for BOD
and TSS. respectively. Additional calculations and supporting figures for peak conditions have
been included as Attachment A to this report.
Chemours Fayetteville Future Wastewater Flows Starting 2021
Kurar ay DuPont fhmmeralraed
Sentry Glass Water Systems ✓-ca,., _,fl_ n. ;L
90 r.. god 26,000 grad 50.000 gpd
33 mg7L 8005 33 m9&L BOW 2 e9L BOD5 7 mg...BODS
19 PPO BOOS 19 PPD 8005 04 PR)B005 _a PPD B005
Quench Tank
21,600 grad 3.000 god pin�pd
14 ng&130135
3 PP08005 21,1E00 88d14CCW
2 mg&SODS
0.4 PPDB005
Kur ar ay J * w e s ' a Su,p
Film Waster ester n
346,080 epd rakulated Owfall 001
Vacuum Pump 40,000 grad 28,000 god 20,000 god 141.1 PAD BOOS ralrulated Treatment Pla 340.080 90
2,880 grad 6 mg/L8005 23.6 19(IB005 220sgl)B005 48.9 osg/L BODS
2200 mg&BODS 2.0 PPO BOD5 5.5 PPO B005 36.8 PPD BOOS
52.8 PPO B005 Swing 2020
Ohsnws Thatmal
OtalAcer LRatlRsgr WWPbw I Entrained Water Loss,Blositrdge Oupesal
1,000 gad
SteatasfiV
0uernoh Terra 21,600 grad Line 1 See tab DuPont Wastewater Data Se
Vaooum Pump 2,880 grad Lee 2' See tab DuPont Wastewater Data Set
K..Jagyr—•. 'Line 2 wilbe to every 5th and&h week(2 weeks operations)
NCCW 21,600 god (2 w eeks operational)for 2020
'Anticipated to directed to NCCW ditch
by January 2020 rhemouts
Thermal Oxidizer 40,000 grad
Spring 2020
Figure 3:Phase 1 Process Wastewater Mass Balance(BOD)
AECOM Project# 60637192 Page 10

AECOM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
Chemours Fayetteville Future Wastewater Flows Starting 2021
Kur ran * WWTP Mum,Monitoring Locat,t
Sentry Glass * Ksa.ay Wasteawter Monitoring Locau,r.
LM1 LM2
68.000 gpd 88,000 gpd 28000 gpd 50,000 gpd
349 mg&L'SS 349 nrg&TSS 5 mg&L TSS 45 mg&L TSS
198 PPO TSS 138 PPO TSS 1.08 PP0 T55 18.8 PPE)TSS
Quench Tank Evaporative Loss,Surface Evaporative Loss,Slr„,,_
21,600 gpd 3,000 gpd 2000 gpd
3.6 mg&TSS �--��
1 PPOTSS 21,600 gpd NCCW l 1
162 rrglL TSS
Kuraray 1 232 PPO TSS •
Film ,7�
M 346,080®d calculated Outf all 001
Vacuum Pump 40,000 gpd 28,000 gpd 20,000 gpd 497.3 PPD TSS calculated 340,060
21880 gpd 27 rrglL TSS 3.2 mg1L TSS 220 mglL TSS 1723 mg/t TSS
213 mg&L TS5 9 PPD TSS 0.7 PPD TSS 36.8 PPD TSS
5 3 PPO TSS Spring 2020
Chemours Thermal Sankary WW Flow
Oxidizer Entrained Water Loss,Biosludge Disposal
1,000 gpd
Kuzma:thin Lh usa
Quench Tank 21,610 gpd Lem 1 See tab DuPont Wastewater Data Set
VacoumPunp 2,880 gpd Lne 2' See tab DuPont Wastewater Data Set
Klrray Sentry Glass 'Line 2 will be tun every Sth and 6th week 12 weeks operational
NCCW 21,600 gpd (2 weeks operationa01or 2020
•Arwicpated to directed to NCCW ditch
by January 2020 Chesouu
Thermal Oxidizer 40,000 gpd
Sprig 2020
Figure 4:Phase 1 Process Wastewater Mass Balance(TSS)
2.5 WWTP Design Basis
2.5.1 Recommended Process Conditions
Based on the information presented in Section 2 of this report. the following conditions have
been established as operating conditions for process.
• The Food-to-Mass (FM) Ratio (BOD to MLSS) should be maintained between 0.05-0.10
as required for a typical healthy biological system.
• The Mixed Liquid Suspended Solids (MLSS) concentration should be maintained
between 3000-6000 mg/L.
• Approximately 75% of the MLSS are volatile components (vMLSS) that will be active in
the biological process. The remaining 25°/0 will be inert solids.
• BOD and/or MLSS can be adjusted to maintain the FM ratio. so long as the values of
each remain within the target range. It is expected that supplemental BOD may be
required to be added periodically to maintain the system minimum conditions.
• The pH within the biological treatment zone should be maintained between a target
range of 6.5-7.5 s.u.
• The daily average temperature within the aeration zone should be less than 95"F to
protect the biological components. The peak hourly temperature should remain below
110"F
• Aeration systems (blowers and coarse bubble diffusers) should be operated to provide
sufficient air to both maintain a minimum target of 2 mg/L of dissolved oxygen and also
promotes robust / complete mixing within the biological reactor.
• Hydraulic Retention Time (HRT) for the aeration zone should be targeted to be between
18-36 hours for a typical extended aeration system.
• Solids Retention Time (SRT) within the overall treatment system should be maintained
between 20-30 days.
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=TOM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
• Nutrient levels for nitrogen (N) and phosphorus (P) should be maintained at a minimum
ratio of 100:5:1 for BOD to N to P.
2.5.2 Operating Characteristics to meet Process Conditions
The intent of this section is to define adjustments to the treatment process to align with the
recommended operating conditions. No modifications to tanks are intended for implementation
during Phase 1 of this project, but tank levels may be adjusted achieve to a target volume to
optimize treatment based on influent conditions.
In order to provide a basis for identifying operating conditions, recommendations have been
developed using 100,000 gallons as a unit volume basis for the operating conditions in the
aeration zone of the biological treatment system. The values can be adjusted based on scaling
the data to the actual volume used in the Pre-Digestion Tank.
• The minimum operating conditions for normal biological treatment system should be
based on maintaining a Food-to-Mass (F:M) ratio of 0.05 and MLSS of 3000 mg/L,
assuming 75% are volatile solids.
• To meet the HRT target of 18-36 hours:
o Influent flow should be between 66,000 and 133,000 gallons per day at the
100,000 gallons operating volume:
o Influent flow should be between 165,000 and 332,500 gallons per day at the
250,000 operating volume.
• To meet the BOD requirements for F:M of 0.05 for MLSS of 3,000 mg/L:
o Influent BOD should be 95 PPD in order to maintain the F:M ratio at the 100,000
gallon operating volume
o Influent BOD should be 235 PPD in order to maintain the F:M ratio at the
100,000 gallon operating volume
• To meet the MLSS target of 3,000 mg/L, using 2% thickness in the clarifier underflow:
o Return activated sludge (RAS) from Clarifier#3 should be approximately 2,500
gallons per day (9 gpm) at the 100,000 gallons per day of influent.
o Return activated sludge (RAS) from Clarifier#3 should be approximately 8,750
gallons per day (32 gpm) at the 250,000 gallons per day of influent.
• To meet the solids wasting rate to maintain SRT, using 2% thickness in the clarifier
underflow, 3,000 mg/L MLSS, and 20 day retention time:
O 125 ppd (625 gallons) of WAS at the 100,000 gallon operating volume
O 315 ppd (1,660 gallons) of WAS at the 250,000 gallon operating volume
A calculations spreadsheet used to develop these values has been provided to Chemours as a
supplement to this report. An example of these calculations is reflected in Figure 5.
AECOM Project# 60637192 Page 12

_ COM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
Chemours Fayetteville Phase 1 Condition and Operating Conditions
Design Conditions
Value Target Range
F:M Ratio(BOD:MLSS) 0.05 0.05-0.1
MLSS(mg/L) 3000 3000-6000
%volatile in MLSS 75% 75-100%
RAS/WAS%Solids 2% 2-5%
RAS Density(lbs/gal) 9.4 9.4-11.4
SRT(days) 20 20-30
DO(Ibs 02/Ibs BOD) 1.5 1.5-3
Density 02 @ 0 degree C(g/L) 1.429
02 Transfer Efficiency 5%
BOD:N:P ratio 100:5:1
Operating Conditions
Volume of Aeration Zone (gal) 250,000 100,000-250,000
Influent Flow Rate (gpd) 350,000 100,000-350,000
HRT(hrs) 17 18-36 hrs
MLSS in Aeration Zone(Ibs) 6,250 2,500-12,500
Required BOD(lbs/day) 234 100-475
Required 02(lbs/day) 352 150-725
Required Aeration Flow(SCFM) 274 100-500
RAS(lbs/day) 8,750 6,000-17,500
RAS(gpm) 32 F 10-35
RAS(gpd)d 46,543
WAS(lbs/day) 313 200-650
WAS(gpd) 1,662 600-1800
Nitrogen Requirement(ppd) 11.72 6-24
Phosphorus Requirement(ppd) 2.34 1-5
Figure 5:Phase 1 Process Wastewater Operations Analysis
Piping and pumping system will be reconfigured as required to meet the revised operating
conditions.
AECOM Project# 60637192 Page 13

AECOMChemours Fayetteville WWTP Conceptual Design
uM Phase 1 Engineering Report and Basis of Design
Revision B
3 PHASE 1 SYSTEM DESCRIPTION
The following sections describe the equipment and operations of the wastewater treatment
system as configured for Phase 1. Please refer to Figure 6 for the Phase 1 Process Flow
Diagram. \\
/BOD
Supplement H—
\\\
\Ta nk
.. Pre-Digester Tank i �1
converted to
♦ ��
Biological Oxidation
Reactors 1�
L
•
`
Figure 6 Phase 1 Process Flow Diagram
3.1 Wastewater Equipment
The following sections provide a brief overview of the configuration of components to be used in
the Phase 1 wastewater treatment process. Each section describes the major functionality of
each unit process as well as any planned modifications to the existing equipment to align with
the revised configuration.
3.1.1 Collection Sump
All wastewater, including process wastes, sanitary wastes, and cooling water discharges, is
received at the collection sump. The sump is equipped with three end-suction centrifugal
pumps that operate on level control to discharge the sump contents to the Equalization Basin
Table 3.1 summarizes the conditions for the Collection Sump and associated equipment.
AECOM Project# 60637192 Page 14

AECOM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
Table 3.1 Collection Sump Characteristics
Description
Type of Equipment Collection Sump with centrifugal
pumps
Number of Chambers 1
Working Volume (gal) 17,500
•
Material of construction Concrete (sump)
Duplex stainless steel (pumps)
Number of Pumps 3
Motor Horsepower 20
Flow Rate per pump (gpm) 900
Pump Configuration Lead/Lag/Standby
Required Modifications for Phase 1 Configuration
No changes are planned for the Collection Sump as part of Phase 1.
3.1.2 Equalization Basin
Wastewater pumped the collection sump is discharged to the Equalization Basin, which is an in-
ground basin that provides flow and water quality equalization. The basin is sized at 850,000
gallons, which provided approximately 24 hours of retention time based on the original plant
design. Wastewater in the equalization basin is mixed and aerated using three floating aerators
and two floating mixer, which are used based on seasonal conditions. The contents are
discharged to the Pre-Digestion tank using two end suction centrifugal pumps, which are
controlled based on level.
Table 3.2 summarizes the characteristics for the Equalization Basin and associated equipment.
Table 3.2 Equalization Basin Characteristics
Description
Type of Equipment In-ground basin
Working Volume (gal) 850,000
Material of construction Concrete (basin)
316 stainless steel (equipment)
Number of Pumps 2
Pump Motor Horsepower 30
Flow Rate per Pump (gpm) 800
Pump Configuration Duty/Standby
Number of Aerators 3
Aerator Horsepower 40
Number of Mixers 2
Mixer Horsepower 15
AECOM Project# 60637192 Page 15

AECOM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
Required Modifications for Phase 1 Configuration
No changes are planned for the equipment associated with the Equalization Basin as part of
Phase 1. However, a new 4" pipe connection will be added from the Aeration Feed pump
discharge of the Pre-digestion tank effluent to return flow back to the Equalization Basin. The
recycle loop will be used as required in the event that the influent loading rate to the
Equalization Basin is below the minimum operating point for the Pre-digestion tank. Net
discharge must be adjusted to maintain both the target HRT in the Pre-digestion tank as well as
the 7' as the minimum operating level in the Equalization Basin.
The recycle loop from Pre-digestion Tank effluent may also be utilized in the event that the BOD
has not been sufficiently attenuated within the tank.
Figure 7 provides an illustration of the proposed piping modification based on a redline of the
current P&ID.
w FROM FILTERED
- I WATER SYSTEM
� ^ Iq PIA43C M1203647
8. V V i
OD •( 991PT
SP42U 7 INSULATED
6 (o0' TO AERATION
Mg CD SP42U VI3665
j sTAna+ 50 ANT
31-989-3
1,, Recycle to
TYGON Equanatan Basin
'71— TUBING
7.
� � g N A DRAIN)
G1341 Qo}E 4,0]
VARIABLE K' 8' FROM
vs SPEED ORIYE 384 EOURUZVTION
31-20-2.62 BASIN
64 s - - 26(99IWT-2) SP42U W12B3670
y
HM AI A
Figure 7 Redline of PID W1203664
The recycle line may also be configured to include injection points for supplemental BOD,
nitrogen, and phosphorus as required to maintain characteristics within the Equalization Basin
contents as appropriate for the influent to the Pre-Digestion Tank.
3.1.3 Pre-Digestion Tank
Wastewater discharged from the Equalization Basin will be received in the Pre-Digestion Tank,
which is a 250.000 gallon vessel equipped with coarse air diffusers for maintaining oxygen
levels within the vessel and promoting mixing. The operating level within the Pre-Digestion
Tank can be controlled by adjusting the feed rate from the Equalization Basin or the rate of
AECOM Project# 60637192 Page 16

A.F.-OM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
discharge to the Aeration Tank. The contents are currently discharged to the Aeration tank
using two end suction centrifugal pumps, which are controlled based on level.
Table 3.3 summarizes the characteristics for the Pre-Digestion Tank and associated equipment.
Table 3.3 Pre-Digestion Tank Characteristics
Description
Type of Equipment Above ground steel tank
Working Volume (gal) 250,000
Material of construction Steel (tank)
Stainless Steel (submerged
aeration equipment)
316 stainless steel (blower)
Number of Blowers 1
Blower Motor Horsepower 40
Flow Rate per Blower (icfm) 420
Number of Pumps 2
Pump Motor Horsepower 25
Flow Rate per Pump (gpm) 700
Required Modifications for Phase 1 Configuration
The Pre-Digestion tank was originally designed to provide additional aeration to maintain
dissolved oxygen levels in the wastewater prior to being introduced into the Aeration Tank as
the biological reactor. Given the reduced BOD loading on the system, the Pre-Digestion Tank
represents a more appropriate size for the required aeration zone, so the tank will be
reconfigured to operate as the primary biological reactor, which will include introducing RAS into
the influent to maintain MLSS. The existing Aeration Tank serving as a diversion tank and
backup aeration zone.
In order to re-configure the Pre-Digestion Tank to function as the biological reactor, several
changes must be completed:
• The discharge piping from the Aeration Tank Feed pumps will be modified to allow for
the effluent from the Pre-Digestion Tank to be bypassed around the Aeration Tank and
fed directly to Clarifier#3. Additionally, a connection will be made to allow a portion of
the pump discharge to be returned to the Equalization Basin to maintain overall
hydraulics. The changes are reflected in Figure 8.
AECOM Project# 60637192 Page 17

A-COM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
1011/11
FROM FILTERED
WATER SYSTEM
n y P1443C M1203617
I-- --�► ( 99IPT )
2U SP4 INSULATED
• B' B' TO AERATION
:`1) l�j B2 TAW
rMPLE
STATION 59 d 51 SP42U
MI203665
SA
�4 �n E.
A --I TUBING TYGON
To EWa9zal oo
!!! J m
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ry V ,:1�16.13N
, -- TO a N � TO Clarifier F3 Wet
�, � � �, A ORABV
A
-¢LLB
YARIABLE B' B' FROM
ORIYE W.
vs SPEED ORIVE _5 3B EIXIALIZATION
36
3 31-20-2.62 ® I
I
BASIN
1T-i) 6a 9 9 `- - /_\(9914T-2) ^u T SPQU W120367N
l\ !�� Figure 8 Redlline of PID W1203664
• A new 2" connection will be provided on the inlet to the Pre-Digestion Tank for
introduction of RAS as necessary to maintain the MLSS.
3.1.4 Clarifier#3
Wastewater discharged from the Pre-Digestion Tank will be received in Clarifier#3, which is a
685,000 gallons vessel equipped with equipment to promote settling and thickening of the
wastewater sludge. The operating level within Clarifier#3 is fixed, with the overflow routed to a
manhole and measurement flume prior to being directed to the outfall. The rotating sludge
equipment collect and thickens the MLSS in the bottom of the tank, which serves as a source
zone for supplying RAS to the process. A portion of the RAS is discharged on a periodic basis
to the sludge management equipment for dewatering as necessary to maintain sludge age.
No changes are anticipated for the basic operating principles for Clarifier#3 for the Phase 1
modifications. The rate of accumulation of sludge will be significantly reduced based on the
reduce hydraulic and BOD load, such that the rate of accumulation of sludge and associated
requirements for wasting will be significantly reduced. The sludge blanket level will need to be
maintained at a lower level to minimize the potential for the sludge to have excessive retention
time within Clarifier#3 that could promote anoxic conditions that may produce H2S. Operations
should monitor the WAS pH, color, and odor to assess the conditions in the blanket.
Table 3.4 summarizes the characteristics for Clarifier #3 and associated equipment.
AECOM Project# 60637192 Page 18

A-COM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
Table 3.4 Clarifier#3 Characteristics
Description
Type of Equipment Above ground cone bottom steel
tank
Working Volume (gal) 685,000
Material of construction Coated Steel (tank)
Coated Steel (submerged
equipment)
316 stainless steel (RAS Pumps)
Number of Pumps 5
Pump Motor Horsepower 50
Flow Rate per Pump (gpm) 1400
Required Modifications for Phase 1 Configuration
A new 2" RAS line and 50 gpm pump (as a replacement for one the existing Clarifier#3 RAS
Pump) will be added to the underflow piping from Clarifier#3 to discharge thickened sludge
back to the Pre-Digestion Tank as necessary to maintain the MLSS.
Due to the changes in operating conditions, it is possible that sludge characteristics may be
altered, such that there may be a need for sludge conditioning chemicals to be added to
improve settling. The need for this system will be monitored during initial operation of the Phase
1 conditions. The existing polymer feed system can be used as needed to help address poor
settling characteristics in the clarifier.
3.1.5 Chemical Feed
BOD Supplement feed
There is no current feed system for managing supplemental BOD. The existing treatment
system was based on a significant BOD load in the process wastewater that is received at the
facility. The changes in the manufacturing operations are anticipated to reduce the BOD load to
a point that may fall below the minimum food-to-mass ratio required to maintain a healthy
biological community within the treatment process.
Required Modifications for Phase 1 Configuration
A chemical feed system will be added to provide a supplemental BOD source (initially identified
as the product CG-80 by Brenntag, which provides 6.7 pounds of BOD per gallon. Other
sources of supplemental BOD are being evaluated). The system will be integrated into the
Phase 1 configuration, with a new injection point added in front of the Pre-digestion tank to
facilitate the introduction of supplemental BOD as required to meet the appropriate F:M ratio for
the biological system. The system is expected to be configured in a similar manner as other
chemical feed systems on site, including a storage tank and chemical metering pump skid.
BOD supplementation will be adjusted as required based on performance characteristics and
process monitoring data.
AECOM Project# 60637192 Page 19

AECOM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
Determination of the rate of injection of BOD supplement is expected to be based on monitoring
parameters within the biological system. The key parameters will include sludge volume index
(SVI, which will reflect sludge bulking if BOD levels are too low), chemical oxygen demand (as a
surrogate for BOD; additional work should be completed in Phase 2 to determine if a stable
correlation exists between these values), and BOD sampling.
Table 3.5 summarizes the details of the BOD feed system.
Table 3.5 Supplemental ROD Feed System
Description
Type of Equipment Chemical Storage and Feed
System
Storage Volume (gal) 2500
Material of construction HDPE
Number of Tanks 1
Number of Pumps 2
Pump Feed rate (gph) 2.0
Injection Point Feed to Pre-Digestion Tank or
Return Flow to Equalization
Basin
Nitrogen feed
The existing treatment system includes a liquid ammonia feed system for the process. This
system will be reused in the Phase 1 configuration, with a new injection point added in front of
the pre-digestion tank to facilitate the introduction of supplemental nitrogen as required to meet
the appropriate nutrient ratio for the biological system. No changes are planned for the storage
tank, but the feed pump may be adjusted to meet the reduced dosage requirement.
Table 3.6 summarizes the details of the ammonia feed system.
Table 3.6 Supplemental Nitrogen Feed System
Description
Type of Equipment Ammonia Chemical Storage and
Feed System
Storage Volume (gal)
Material of construction FRP
Number of Tanks 1
Number of Pumps 2
Pump Feed rate (gph) 6.34
Injection Point Feed to Pre-Digestion Tank or
Return Flow to Equalization
Basin
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AECOM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
Required Modifications for Phase 1 Configuration
No significant changes are planned for the Nitrogen system as part of Phase 1. Discharge
piping will need to be re-routed to the new feed point.
Phosphorous feed
The existing treatment system includes a phosphoric acid feed system for the process, but it
has not been required to maintain the health of the biological process. This system will be
reused in the Phase 1 configuration, including completing any maintenance to the system in
order to make it service-ready as well as adding a new injection point added in front of the pre-
digestion tank to facilitate the introduction of supplemental phosphorus as required to meet the
appropriate nutrient ratio for the biological system.
Table 3.7 summarizes the details of the supplemental phosphorous feed system.
Table 3.7 Supplemental Phosphorus Feed System
Description
Type of Equipment Phosphorous Chemical Storage
and Feed System
Storage Volume (gal) 350 (tote)
Material of construction PE
Number of Tanks 1
Number of Pumps 1
Pump Feed rate (gph) 0.61
Injection Point Feed to Pre-Digestion Tank or
Return Flow to Equalization
Basin
Required Modifications for Phase 1 Configuration
No significant changes are planned for the Phosphorus system as part of Phase 1. If
Phosphorus is required, it will be fed from totes in lieu of the previous tank system, so suction
piping for the pump will need to be rerouted. Similarly, discharge piping will need to be re-
routed to the new feed point.
3.1.6 Other Supporting Equipment
Retention Tank, Aeration Tank, and Equipm
ent
The existing Aeration Tank, biomixer, and blower equipment is oversized for the Phase 1
process demands. Given the ability to more adequately manage the biological process in the
smaller pre-digestion tank, the Aeration Tank and associated equipment will not be utilized in
the Phase 1 process. However, due to the uncertainty regarding the BOD loading to the
wastewater process at the facility, it is recommended that the Aeration tank and associated
equipment should be maintained in working order to provide the following functionality:
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AECOM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
• The Retention Tank can provide additional equalization and storage for treatment influent in
the event that the pre-digestion process is disrupted and/or if there is a significant increase
in BOD loading that exceeds the capacity of the biological unit.
• The Aeration Tank has a total capacity of 1,700,000 gallons, which represents
approximately 6 days of storage capacity. The tank and aeration equipment therefore can
provide a division tank to provide additional equalization and storage for treatment effluent
in the event that the pre-digestion process is disrupted and/or if there is a significant
increase in BOD loading that exceeds the capacity of the biological unit.
• The Aeration tank and equipment can provide increased treatment capacity if there are
future changes in the manufacturing operations at the facility that increase either the
hydraulic loading or BOD load
• The aeration equipment (blowers can be connected to the pre-digestion tank aeration grid,
providing additional redundancy and aeration capacity. However, the blowers are
significantly oversized for the Pre-Digestion Tank demands, so a blow-off assembly would
likely be required to prevent the blower motors from being overloaded.
Sludge Management Equipment
The existing WWTP is equipped with mechanical dewatering equipment, including a sludge
holding tank, rotary drum filter (RDF), dissolved air flotation (DAF) system, screw press, and
sludge dryer. The DAF has not been used in recent years and would require significant
rehabilitation to restore functionality, but the equipment is not anticipated to be required to meet
the reduced solids generation requirement for the Phase 1 process configuration.
The current sludge management process is expected to be adequate for the Phase 1
configuration. The process will continue to involve transfer of WAS to the sludge holding tank
prior to processing through the screw press. However, due to the significant reduction in the
solids generation rate in the biological process, the utilization of the equipment is anticipated to
drop significantly.
Clarifier#1 and #2
Clarifier#1 and Clarifier#2 are legacy assets at the WWTP. They are not used in the current
process, and they are not anticipated be required to meet the reduced loading requirement for
the Phase 1 process configuration. However, they will remain as available assets to provide
redundancy in case of the need for maintenance for Clarifier#3. RAS Pump #2 that serves
Clarifier#1 and #2 will be replaced to facilitate that equipment serving as a backup.
3.2 Summary of Improvements
Table 3.8 is a summary of the Phase 1 improvements that were identified in Section 3.1.
AECOM Project# 60637192 Page 22

AECOM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
Table 3.8 Summary of Phase 1 Improvements
System Improvements
Collection Sump No changes to the basin or other equipment
Retention Tank No changes to the basin or other equipment
Equalization No changes to the basin or other equipment
Basin A new 4" pipe to be added to the EQ Basin for Pre-Digestion Tank
effluent recycle to maintain pump performance curve and HRT.
Pre-Digestion No change to the tank or other equipment
Tank: The influent piping to be modified to provide inject ports for BOD
Supplement, Nitrogen, and Phosphorus
A new 2" connection to be added to the tank to facilitate introduction of
RAS
The effluent piping to be modified to provide a new 4" connection from
the Aeration Feed Pumps to be routed around the Aeration Tank.
A new 4" line to be added to the pump discharge and routed to the EQ
basin.
Aeration Tank: No changes to the tank or equipment, but the system should be purged '
of biosolids after the reaction zone is moved to the Pre-Digestion Tank.
Clarifier#3: The influent piping to be modified to allow for connection to the new 4"
line from the Pre-Digestion Tank
One of the existing RAS pumps (#2) to be replaced with a smaller unit to
facilitate the reduced demand.
A new 2" RAS line will be added to route RAS to the Pre-Digestion Tank.
Clarifier#1/#2: No change to the tanks
Chemicals: The ammonia feed to be to add the ability to inject into the influent to the
Pre-Digestion Tank
The phosphoric acid feed to modified to add the ability to inject into the
influent to the Pre-Digestion Tank
A pump and injection point to be configured for feeding BOD supplement
to the Pre-Digestion Tank influent
The existing polymer feed system for the Clarifiers should be reviewed to
confirm functionality and has appropriate chemicals for use in the
modified system
Sludge Handling No changes to the equipment
Consideration should be given to the WAS line from the Clarifiers to the
Sludge Tank, which may need to be downsized due to the reduced pump
rate to the Pre-Digestion Tank
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AECOM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
4 OPERATING PHILOSOPHY
4.1.1 Normal Operation
The system is anticipated to manage a flow rate of approximately 346,000 gallons per day.
Approximately 135 PPD of BOD load will be required to meet the system requirements based
on operating the Pre-Digestion tank at 100,000 gallon operating volume2. Monitoring of COD
and sludge age should continue as process variables for control of the system.
The following is a brief description of the treatment approach that will be employed under
normal conditions.
1. Wastewater will to be received at the Collection Sump and discharge to the Equalization
Basin.
2. The Equalization Basin will be used to attenuate flow spikes and homogenize water
quality while providing a target HRT of approximately 24 hours. The water surface
elevation will move up/down based on wastewater received from the sump and the
discharge rate to the Pre-digestion tank. Wastewater will be discharged at a rate of
approximately 200-250 gpm from the Equalization Basin to the Pre-digestion Tank using
Pre-digestion Feed Pumps.
3. The Pre-digestion tank will serve as the primary reactor vessel3 and will receive flow
from the equalization basin as well as return-activated sludge from the clarifier. The Pre-
digestion Blower has sufficient capacity and will provide air for maintaining dissolved
oxygen levels at greater than 1.5 mg/L as well as providing mixing. Nutrients will be
added to influent to the Pre-digester Tank as required to maintain conditions for bacterial
growth and associated assimilation of BOD within the target HRT.
4. Pre-digestion Tank mixed liquor will be discharged using the Aeration Feed Pumps at a
rate of approximately 200-250 gpm and routed to Clarifier#3, which will serve as the
primary settling and solids accumulation vessel. Clarified effluent will overflow from the
clarifier and will be routed to the outfall. Sludge will accumulate in the clarifier and serve
as the source supply for RAS and WAS. Monitoring of sludge blanket will allow for
control of WAS mass discharge to the residuals management equipment to maintain a
sludge age of approximately 20 days.
4.1.2 Secondary Operations
Secondary operations are anticipated to be used if the wastewater system exhibits reduced
influent flow rates or BOD in the influent, such that the normal operation of the biological
process cannot be maintained. The approach to secondary operations will utilize the same
treatment equipment, but operating conditions will be adjusted to maintain the target operating
conditions based on the revised influent conditions.
2 Operation at 100,000 gallon operating level may reduce the 02 transfer efficiency,which may increase blower flow demand to
meet the mass transfer requirement.
3 Using the Pre-Digestion Tank as the biological reactor will require initially charging/seeing the unit with biomass from Clarifier#3
prior to introducing raw wastewater.
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AECOM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
1. Wastewater will continue to be received at the Collection Sump and discharge to the
Equalization Basin.
2. The Equalization Basin will continue to operate to attenuate flow spikes and homogenize
wastewater quality. However, the average water surface in the basin will be lowered
based on the reduced influent flow in order to manage the HRT within the basin at
approximately 24 hours. The Equalization Basin level will need to be maintained above
the minimum submergence for the mixing and aeration equipment, which may require
the use of a recycle stream from the Pre-Digestion Tank effluent to maintain pump
performance.
3. The Pre-digestion Tank will continue to serve as the primary reactor vessel, using RAS
from Clarifier#3 and air from the Pre-digestion Tank Blower. However, operations will
be adjusted relative to the changed loading conditions:
a. In the event that the influent flow rate results in a HRT that exceeds 36 hours, the
water surface elevation within the Pre-Digestion tank will be adjusted as required
to maintain the HRT within the target range.
b. RAS rates will be adjusted to maintain a MLSS of approximately 3,000 mg/L.
c. Nutrients and / or BOD supplement will be added to the Pre-digester Tank as
required to maintain biological conditions as necessary to promote healthy
bacterial growth and associated consumption of BOD.
4. Pre-digestion Tank effluent will continue to be discharged from the Pre-digestion Tank to
using the Aeration Feed Pumps. However, in order to maintain appropriate conditions
for both the Pre-digestion Tank feed and Aeration Feed Pumps, a portion of the effluent
may be recycled to the Equalization Basin to maintain minimum flow requirements.
5. The balance of Pre-digestion Tank effluent will discharge to Clarifier#3, which will
continue to serve as the primary settling and solids accumulation vessel. Clarified
effluent will overflow from the clarifier and will be routed to the outfall. Sludge will
accumulate in the base cone of the clarifier, which will serve as the source supply for
RAS and WAS. WAS rates will continue to be controlled to maintain a sludge age of
approximately 20-30 days. SRT will be adjusted as needed to maintain a low SVI and
well-settling sludge.
4.1.3 Alternative Operations
Alternative operations are anticipated to be used if the wastewater system exhibits excessive
influent flow rates that result in a HRT of less than 18 hours in the Pre-digestion Tank at full
capacity (250,000 gallons) and/or BOD mass load in the influent that exceeds 675 PPD4, such
that the operation of the biological process would be anticipated to be overloaded and result in
water quality that may not meet the discharge limit.
4 Increases in influent BOD load would first be managed by increasing MLSS concentrations to a
maximum of 6000 mg/L.
Pa 25 AECOM Project# 60637192 ge

A=COM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
In order to accommodate the higher flow rate or BOD load, the treatment system will require a
larger aeration zone to accomplish degradation of the wastewater and/or additional storage of
wastewater.
The following text describes the incremental steps that will be taken by Chemours to attenuate
excessive flow or BOD load:
1. Excessive Flow:
a. The level within the Equalization Basin will be allowed to rise until it reaches the
maximum level.
b. Once the Equalization Basin is at its maximum capacity, flow out of the
Equalization Basin to the Pre-Digestion Tank will be increased, with a
proportional increase in operating volume, BOD supplementation, and nutrient
feed to maintain operations within the targeted operating conditions.
c. In the event that both (a) and (b) are not sufficient to attenuate the higher flow
requirements sufficiently to remain in compliance with the discharge limits,
influent to the Pre-digestion tank will be diverted to the Retention Tank as a
holding basin, or effluent from the Pre-digestion tank will be diverted to the
Aeration Tank as a holding basin, with the intent that the captured volume will
be recycled to the Equalization basin once the flow surge has abated.
d. In the event that (a), (b), and (c) are insufficient to achieve compliance,
wastewater generating activities at the Fayetteville facility will be curtailed until
such time as the excess wastewater inventory has been attenuated and there is
sufficient system capacity to meet the production demands.
2. In the rare occasion of excessive BOD Load:
a. The rate of RAS recycle will be increased to increase the MLSS within the Pre-
digestion Tank up to a maximum of 6,000 mg/L. Nutrient feed and aeration flow
rates will have a corresponding increase.
b. Once the MLSS level has been increased to a maximum of 6,000 mg/L, the
operating level within the Pre-digestion Tank will be increased as required to a
maximum of 250,000 gallons.
c. In the event that both (a) and (b) are not sufficient to attenuate the higher flow
requirements sufficiently to remain in compliance with the discharge limits,
influent to the Pre-digestion tank will be diverted to the Retention Tank as a
holding basin, or effluent from the Pre-digestion Tank will be diverted to the
Aeration Tank as a holding basin, with the intent that the captured volume Basin
will be recycled to the Equalization basin once the flow surge has abated.
5 CODES, STANDARDS, AND SPECIFICATIONS
The design of the wastewater system and supporting infrastructure will be done in accordance
with local Building Codes and ordinances as well as Chemour's engineering design user
requirements and engineering standards where applicable. In the instance that there is a
AECOM Project# 60637192 Page 26

AECOM Chemours Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
conflict between Building Codes and Chemours standard, the applicable Code will supersede.
In instances where there is not a governing standard from Code or Chemours requirements,
appropriate industry standards will be used based on demonstration of service in similar
operating environments.
System components should consider the service environment and establish appropriate
materials of construction in order minimize corrosion.
6 CONSIDERATIONS FOR PHASE 2
The approach being employed for Phase 1 has been based on identification of the required
operational and equipment changes to align with the schedule for completion of changes in
manufacturing operations. While these modifications will allow the system to operate in
compliance with the discharge permit, this configuration will likely include operational
inefficiencies that can be resolved with further optimization of system and equipment
configuration.
7 STATEMENT OF LIMITATIONS
This report is for the sole use of Chemours and is not to be distributed to third parties outside
the Chemours or AECOM organization. The scope of services performed during this design may
not be appropriate to satisfy the needs of other users, and any use or re-use of this document or
the findings. conclusions. or recommendations presented herein is at the sole risk of said user.
Background information, design bases. and other data, which AECOM has used in preparing
this report, have been furnished to AECOM by Chemours and third parties. AECOM has relied
on this information as furnished, and is neither responsible for, nor has confirmed, the accuracy
of this information.
This report has been prepared based on certain key assumptions, provided by Chemours and
agreed upon within AECOM, which substantially affect the conclusions and recommendations of
this report. These assumptions, although thought to be reasonable and appropriate, may not
prove to be true in the future. The conclusions and recommendations of AECOM are
conditioned upon these assumptions. Please see Subsection 2.5 for a list of assumptions used
to prepare this report.
AECOM Project# 60637192 Page 27

AECOM Phase
Fayetteville WWTP Conceptual Design
Phase 1 Engineering Report and Basis of Design
Revision B
Attachment A: Mass Balance Calculations
AECOM Project# 60637192

Chemours Fayetteville Future Wastewater Flows Starting 2021
Kuraray Sentry Demineralized * WWTP Influent Monitoring Location
DuPont Stormwater
Glass : m * Kuraray Wasteawter Monitoring Location
Line 1 Line 2
68, l gpd 68,000 gpd 26,000 gpd 50,000 gpd
6 mg/L BODS 6 mg/L BOD5 2 mg/L BODS 5 mg/L BODS
3 PPD B005 3 PPD BODS i 0.4 PPD BOOS 2.0 PPD BOD5
Quench Tank 1 I Evaporative Loss,Surface 1 Evaporative Loss,Sludge
21,600 gpd 3,000 gpd 1 2,000 gpd
4.3 mg/L BODS
1 PPD BODS 21,600 gpd NCCW 1
2 mg/L BODS
0.4 PPD BOOS
Kuraray i • • • •
Ar
Film • 4, * P mp
YSi 346,080 gpd calculated , astewater Treatm A; Outfall 001
Plant
Vacuum Pump 40,000 gpd 1 28,000 gpd 20,000 gpd 89.9 PPD BODS calculated 340,080 gpd
2,880 gpd 3 mg/L BODS 9.8 mg/I BODS 220 mg/I BODS 31.1 mg/L BODS y'
1,667 mg/L BODS 1 PPD BOOS 2.3 PPD BODS 36.8 PPD BODS
40 PPD BOD5 ,Spring 2020
Recycle Process
Chemours Thermal Oxidizer Sanitary WW Flow
Water(RO) Entrained Water Loss,Biosludge Disposal
1,000 gpd
Kuraray Film DuPont
Quench Tank 21,600 gpd Line 1 See tab DuPont Wastewater Data Set •
Vaccum Pump 2,880 gpd Line 2* See tab DuPont Wastewater Data Set
Kuraray Sentry Glass *Line 2 will be run every 5th and 6th week(2 weeks operationa;
NCCW* 21,600 gpd (2 weeks operational)for 2020
*Anticipated to directed to NCCW ditch
by January 2020 Chemours
Thermal Oxidizer 40,000 gpd
Spring 2020
Appendix D-Mass Balance and Flow Balance Diagrams August 30,2020
Notes and Assumptions:
1 All Kuraray flows are from"WWTP Flows-"email sent by Chemours on October 5,2020.
2 Kuraray Vacuum Pump and Quench Tank flows make up Kurary Trosifol®Manufacturing Process Flow.
3 Kuraray Quench Tank,Vacuum Pump and NCCW BODS concentrations are the average concentrations from the respective samples collected in July 2020 and Septemeber 2020.
4 Kuraray BODS mass contributions are calculated from flow and concentratior
5 DuPont Line 1 and Line 2 flows are estimated as future 200%flows(100%each),based on average combined'PVF-1'and'PVF-2'flows being 125%for the period of January 1,2018 through December 31,2019
6 Dupont Line 1 and Line 2 flows are estimated to be the same beyond 2022
7 DuPont BODS concentrations are the average concentrations from the July 2020 sample data
8 DuPont BOD mass is calculated from average flow and sampled concentratior
9 Sanitary flow is from information provided in"WWTP Flows-"email sent by Chemours on 10/5/2020.
10 Sanitary BODS concentration is an average'medium'strength untreated domestic wastewater,Metcalf&Edd\
11 Sanitary BODS mass contributions are calculated from flow and concentratior
12 Chemical Thermal Oxidizer flow is from"WWTP Flows-"email sent by Chemours on October 5,2020.
13 Chemical Thermal Oxidizer BODS concentration is the average concentration observed for Chemours data from July 2020 sampling
14 Chemical Thermal Oxidizer BOD mass contributions are calculated from flow and concentratior
15 WWTP Influent flow is calculated as the sum of the individual waste streams'contribution!
16 WWTP BODS concentration is calculated from flow and mass.
17 WWTP BODS mass is calculated as the sum of the individual waste streams'contribution!
18"Demineralized Water System"includes neutralized regenerate from filtered water produced from river water for onsite non-potable use. This is estimated at 50,000 gpd based on
information provided in"WWTP Flows-"email sent by Chemours on 10/5/2020. Concentrations are based on analytical data from July and August 2020 sampling.
19"Recycle Process Water(RO)"is a new wastewater stream to be added if approved by NC DEQ. Chemours estimates flow at 28,000 gpd per"WWTP Flows-"email,sent 10/5/2020
20"Recycle Process Water(RO)"average BODS concentration is based on analytical data collected from 5 discrete sampling events between 7/28/2020 and 8/5/2020
21 Stormwater flow BODS concentrations have been assumed to be low(<5 mg/L)
22 Stormwater flow BODS mass contributions are calculated from flow and concentration
23 Stormwater flow is from data provided in"WWTP Flows-"email sent by chemours on 10/5/2020
24 Outfall 001 Flow is equal to the WWTP influent flow minus the water losses at the WWTP

Chemours Fayetteville Future Wastewater Flows Starting 2021
Kuraray Sentry Demineralized " WWTP Influent Monitoring Location
DuPont
Glass System ' Kuraray Wasteawter Monitoring Location
Line 1 Line 2
68,000 gpd 68,000 gpd 26,000 gpd I 50,000 gpd
349 mg/L TSS 349 mg/L TSS 5 mg/L TSS 45 mg/L TSS
198 PPD TS 198 PPD TSS 1.08 PPD TSS 18.8 PPD TSS
Quench Tank Evaporative Loss,Surface Evaporative Loss,Sludge
21,600 gpd 3,000 gpd 2,000 gpd
3.6 mg/L TSS
1 PPD TSS 21,600 gpd NCCW
162 mg/L TSS
29.2 PPD TSS
Kuraray i , • , ` • mp
Film 346,080 gpd calculated Wastewater Treatmg>> Outfall 001
Vacuum Pump 40,000 gpd 28,000 gpd 20,000 gpd 497.3 PPD TSS calculated Plant '' 340,080 gpd
2,880 gpd 27 mg/L TSS 3.2 mg/L TSS 220 mg/L TSS 172.3 mg/L TSS
219 mg/L TSS 9 PPD TSS 0.7 PPD TSS 36.8 PPD TSS
5.3 PPD TSS ;Spring 2020 -
Chemours Thermal Oxidizer Sanitary WW Flow
Entrained Water Loss,Biosludge Disposal
1,000 gpd
Kuraray Film DuPont
Quench Tank 21,600 gpd Line 1 See tab DuPont Wastewater Data Set
Vaccum Pump 2,880 gpd Line 2* See tab DuPont Wastewater Data Set
Kuraray Sentry Glass *Line 2 will be run every 5th and 6th week(2 weeks operationa;
NCCW* 21,600 gpd (2 weeks operational)for 2020
*Anticipated to directed to NCCW ditch
by January 2020 Chemours
Thermal Oxidizer 40,000 gpd
Spring 2020
Appendix D-Mass Balance and Flow Balance Diagrams August 30,2020
Notes and Assumptions:
1 All Kuraray flows are from"WWTP Flows-"email sent by Chemours on October 5,2020.
2 Kuraray Vacuum Pump and Quench Tank flows make up Kurary Trosifol®Manufacturing Process Flow.
3 Kuraray Quench Tank,Vacuum Pump,and NCCW TSS concentrations are the average concentrations from the respective samples collected in July 2020 and Septemeber 2020.
4 Kuraray TSS mass contributions are calculated from flow and concentratior
5 DuPont Line 1 and Line 2 flows are estimated as future 200%flows(100%each),based on average combined'PVF-1'and'PVF-2'flows being 125%for the period of January 1,2018 through December 31,2019
6 Dupont Line 1 and Line 2 flows are estimated to be the same beyond 2022
7 DuPont TSS concentrations are the average concentrations from the July 2020 sample data
8 DuPont TSS mass is calculated from average flow and sampled concentratior
9 Sanitary flow is from information provided in"WWTP Flows-"email sent by Chemours on 10/5/2020.
10 Sanitary TSS concentration is an average'medium'strength untreated domestic wastewater,Metcalf&Edd\
11 Sanitary TSS mass contributions are calculated from flow and concentratior
12 Chemical Thermal Oxidizer flow is from"WWTP Flows-"email sent by Chemours on October 5,2020.
13 Chemical Thermal Oxidizer TSS concentration is average concentration observed from July 2020 samplin€
14 Chemical Thermal Oxidizer TSS mass contributions are calculated from flow and concentratior
15 WWTP Influent flow is calculated as the sum of the individual waste streams'contribution!
16 WWTP TSS concentration is calculated from flow and mass.
17 WWTP TSS mass is calculated as the sum of the individual waste streams'contribution
18"Demineralized Water System"includes neutralized regenerate from filtered water produced from river water for onsite non-potable use. This is estimated at 50,000 gpd based on
information provided in"WWTP Flows-"email sent by Chemours on 10/5/2020. Concentrations are based on analytical data from July and August 2020 sampling.
19"Recycle Process Water(RO)"is a new wastewater stream to be added if approved by NC DEQ. Chemours estimates flow at 28,000 gpd per"WWTP Flows-"email,sent 10/5/2020
20"Recycle Process Water(RO)"average TSS concentration is based on analytical data collected from 5 discrete sampling events between 7/28/2020 and 8/5/2020
21 Stormwater flow TSS concentrations have been assumed to be low(<5 mg/L)
22 Stormwater flow TSS mass contributions are calculated from flow and concentration
23 Stormwater flow is from data provided in"WWTP Flows-"email sent by chemours on 10/5/2020
24 Outfall 001 Flow is equal to the WWTP influent flow minus the water losses at the WWTP

Attachment B. 12 Table B. Toxic Metals, Cyanide,
Total Phenols, and Organic Toxic
Pollutants (40 CFR 122.21(G(7(V))

Chemours Company—Fayetteville Works NPDES Permit No.NC0003573
ATTACHMENT B.12
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC
POLLUTANTS(40 CFR 122.21(G)(7)(V))
SECTION 1.TOXIC METALS,CYANIDE,AND TOTAL PHENOLS
The mercury concentration reported on the original application for 2C for Outfall 002 at the effluent was
0.51 micrograms per liter (µg/L), using a detection limit of 0.05 µg/L. Suspecting this result was not
representative, Chemours collected additional samples for low-level mercury analysis in June and July of
2020. These samples were analyzed with a detection level of 0.002 µg/L. The results of the effluent
analysis, shown in Table 1, were two levels of magnitude lower than the previous result. This confirms
that 0.51 µg/L was an outlier. The average of the low-level mercury results is 0.00471 µg/L.
Table 1: Effluent low-level mercury analysis results
Date Sample Mercury Sample MercBi nk field
Location (lag/1) (µg1L)
6/16/20 Outlet 002 0.00458 0.000809
6/17/20 Outlet 002 0.00587 ND(0.002)
7/8/20 Outlet 002 0.00384 ND(0.002)
7/15/20 Outlet 002 0.00456 0.001110*
Average 0.00471
*Result indicative of Field Blank contamination
Additionally, Chemours collected intake samples for mercury analysis using low-level methods, in June
and July of 2020. The results of the intake analysis are shown in Table 2. The intake water mercury
concentration was previously reported as below the detection limit. The low-level analysis shows that the
average intake concentration is 0.00392 µg/L.
Table 2:Intake water low-level mercury results
Date Sample Location Mercury Sample Mercury Field Blank
(µg/L) (µg/L)
6/16/20 Cape Fear River 0.00625 0.000689
6/17/20 Cape Fear River 0.00382 0.000840*
7/8/20 Cape Fear River 0.00035 0.000866*
7/15/20 Cape Fear River 0.00225 0.000726*
Average 0.00392
*Result indicative of Field Blank contamination
November 2020

Attachment F. 12 Matrix Interference During Analysis
of Table 3+ Compounds

Geosyntec t>
consultants 2501 Blue Ridge Road,Suite 430
Raleigh,NC 27607
PH 919.870.0576
FAX [phone]
Geosyntec Consultants of NC,P.C. www.geosyntec.com
NC License No.:C-3500 and C-295
Memorandum
Date: July 31, 2020
To: The Chemours Company FC, LLC
From: Geosyntec Consultants of NC,PC
Subject: Matrix Interference During Analysis of Table 3+Compounds
Geosyntec Consultants of NC,PC(Geosyntec)has prepared this memorandum for The Chemours Company
FC, LLC (Chemours) to describe matrix interference observed during the analysis of Table 3+ per- and
polyfluorinated alkyl substances (PFAS)by analytical methods for Table 3+PFAS (Table 3 Methods),to
recommend interim reporting guidelines and to suggest steps to continue understanding and addressing
these matrix interferences.The Table 3 Method was developed by Chemours,and commercial laboratories
have developed their own Table 3 Methods with guidance from Chemours. The remainder of this
memorandum is organized into the following sections:
• Background—Describing identification of matrix interference issues;
• Scope and Methods—Describing how matrix interference issue was assessed;
• Results—Describing the results of the assessment;
• Discussion—Interpreting the results of the assessment; and
• Recommendations—Guidance for reporting results with matrix interferences and next steps for
resolving matrix interferences
BACKGROUND
Initially the Table 3 Method required that every field sample be analyzed in duplicate and with a matrix
spike, rather than a duplicate and matrix spike per batch (up to 20) of field samples. The low end of
concentrations of interest for the Table 3 compounds is extremely low(i.e., single digit nanograms per liter
[ng/L])and these additional quality assurance steps were taken to provide confidence in analytical results
for samples at the low end of concentrations of interest. In the fall of 2019 Chemours requested that
Geosyntec assess the analytical data over the first two years of data collection to evaluate if the continued
analysis of a duplicate and a matrix spike for every field sample was necessary.
Geosyntec reviewed 27,891 matrix spike results from the Table 3 Method analytical data collected from
September 2017 through October 2019 (the historical data set; Attachment 1). The analysis showed that
79.5%of all matrix spike data points were within the generally recognized range of 70%-130%recovery,
and from this it was concluded that matrix spikes for the Table 3 Method analysis of all environmental
media should be analyzed on a batch frequency(i.e., one per up to 20 client samples), as is typically done
engineers I scientists I innovators

7
Matrix Interference During Analysis of Table 3+ Compounds
31 July 2020
Page 2
in standard EPA methods, rather than on a per sample frequency. However, it was observed that some
compounds were over-recovered in the matrix spikes at a higher frequency and to a higher degree than other
compounds. Consequently, an additional investigation of matrix interferences of Table 3+compounds by
the Table 3 Method was completed and is outlined below.
SCOPE AND METHODS
The scope of the additional investigation of matrix interferences of Table 3+ compounds analyzed by the
Table 3 Method was as follows:
• the historical data set was analyzed in greater depth to assess which compounds and sample
matrices were most susceptible to matrix interference; and
• a laboratory matrix interference study was commissioned to systematically analyze the potential
for matrix interference.
Table 1 provides the full name,common name and CAS number,if available,for the 24 PFAS compounds
(the Table 3+compounds)that have been analyzed by the Table 3 Method. Four of the 24 compounds are
not currently analyzed by the Table 3 Method(as noted in Table 1).
Assessment of Historical Matrix Spike Data Set
The ideal recovery of a compound in a matrix spike is 100%, with a range of approximately 70-130%
typically considered acceptable when assessing data quality (USEPA, 2017). The magnitude of an
exceedance (that is, how far below 70% or how far above 130%the exceedance is) is also of interest; for
example, an analytical result associated with a matrix spike recovery of 200% should be considered less
accurate than an analytical result associated with a matrix spike recovery of 130%. Therefore,the matrix
spike data in the historical data set were assessed to see what percentage of the data are below 20%or above
200%,in order to assess which compounds were the least accurately analyzed as indicated by matrix spikes.
While these criteria are not considered standard data validation criteria, they were selected to represent
matrix spikes substantially outside the standard range of 70-130%.
The historical matrix spike data(data collected from September 2017 through October 2019)were assessed
by compound(Table 2).The data by compound were then divided into nine different environmental media
categories: groundwater, surface water, drinking water, other liquids (e.g., perched water, stormwater,
laboratory studies), soil, sediment, animal tissue, plant tissue and other solids (other biota). The matrix
spike recoveries were reviewed for all 24 Table 3+ compounds for which there are historical data(Table
3).Note that the list of compounds analyzed by the Table 3 Method has evolved over time as the analytical
methods and the site understanding developed; therefore, the complete list of 24 compounds was not
necessarily analyzed for all samples or all media categories.

Matrix Interference During Analysis of Table 3+ Compounds
31 July 2020
Page 3
Laboratory Matrix Interference Study of Table 3+Compounds
A laboratory matrix interference study was commissioned at TestAmerica-Sacramento (TestAmerica),
using Cape Fear River water as the matrix and the 20 Table 3+compounds currently available for analysis
by the Table 3 Method as the analyte list. River water was collected from Bladen Bluffs (River Mile 84)
and shipped to TestAmerica. Three parent samples were created: 1)unamended river water,2)river water
amended with 100 ng/L of each of the 20 Table 3 compounds, and 3)river water amended with 500 ng/L
of each of the 20 Table 3 compounds. Each of the three parent samples was analyzed at four dilutions:
undiluted (lx dilution), 2x dilution, 5x dilution and 10x dilution (for a total of 12 samples) and a matrix
spike was created for each of the 12 samples to assess the effect of diluting the matrix on the measured
concentrations and matrix spike recoveries(matrix spikes were added after the dilution step). Matrix spike
data in the historical data set were assessed to see what percentage of the data are above 200% or below
20%recovery(Table 4). Additionally(beyond the matrix spike data),the measured concentrations in the
samples were compared to expected concentrations(Table 5).
RESULTS
Assessment of Historical Matrix Spike Data Set
By Compound
For the entire set of 24 historical Table 3+ compounds, the percentage of matrix spike recoveries above
200%recovery ranged from 0 to 51%per compound (Table 2). Results plotted by compound(Figure 1)
show that MMF,Hydrolyzed PSDA(formerly BP5),R-PSDA(formerly BP4),DFSA and R-EVE had the
highest percentage of matrix spike recoveries above 200% (51%, 23%, 19%, 24% and 16% of samples
respectively).This percentage of exceedances above 200%for these five compounds was much higher than
for the remaining compounds; for example, only 3.5%of samples for PFMOAA, the next highest ranking
compound for exceedances,had an exceedance above 200%.
For the 24 historical Table 3+compounds,the percentage of matrix spike recoveries below 20%recovery
ranged from 0 to 13%per compound(Table 2 and Figure 2). This indicates there is a small degree of low
recovery of matrix spikes; however, no compounds show low recovery at higher frequency or to a higher
degree than the other compounds. The low matrix recoveries do not appear to be a systematic occurrence
for Table 3+compounds.
By Environmental Media
Because matrix spike recovery data are intended to assess the effect of the sample matrix on the analytical
results, the historical matrix spike recovery data were assessed by environmental media: groundwater,
surface water, drinking water, other liquid (e.g., perched water, stormwater, laboratory studies), soil,
sediment, animal tissue, plant tissue and other solid(other biota). Results are provided in Table 3 and in

Matrix Interference During Analysis of Table 3+ Compounds
31 July 2020
Page 4
Figures 3 through 11, and are summarized below, with an emphasis on MMF, Hydrolyzed PSDA, DFSA,
R-PDSA and R-EVE:
• Groundwater
o There are matrix spike data for 23 of the 24 compounds
o MMF,DFSA and Hydrolyzed PSDA(formerly Byproduct 5)matrix spike recoveries were
above 200%for 88%, 13%and 10%,respectively,of the results per compound
o Matrix spike recoveries above 200%for the remaining 20 compounds ranged from 10%to
0%of the results per compound
• Surface water
o There are matrix spike data for 23 of the 24 compounds
o MMF, Hydrolyzed PSDA, DFSA, R-PDSA and R-EVE matrix spike recoveries were
above 200%for 60%,34%,33%,28%and 25%,respectively,of the results per compound
o Matrix spike recoveries above 200% for the remaining 18 compounds ranged from 4%to
0.2%of the results per compound
• Drinking water
o There are matrix spike data for 10 of the 24 compounds
• There were no data for MMF,Hydrolyzed PSDA,DFSA,R-PDSA and R-EVE
o Matrix spike recoveries above 200% for all 10 compounds ranged from 2%to 0% of the
results per compound
• Other liquids
o There are matrix spike data for 24 of 24 compounds
o MMF, Hydrolyzed PSDA, R-PDSA, R-EVE and DFSA matrix spike recoveries were
above 200%for 15%, 14%, 13%, 12%and 5%,respectively,of the results per compound
o Matrix spike recoveries above 200%for all 24 compounds ranged from 0.5%to 0%of the
results per compound
• Soil
o There are matrix spike data for 19 of 24 compounds
• There were no data for MMF and DFSA
o Matrix spike recoveries above 200% for all 19 compounds ranged from 3%to 0% of the
results per compound
• Sediment
o There are matrix spike data for 19 of 24 compounds
• There were no data for MMF and DFSA
o Matrix spike recoveries above 200% for all 19 compounds ranged from 8%to 0% of the
results per compound
• Animal tissue
o There are matrix spike data for 19 of 24 compounds
• There were no data for MMF and DFSA
o Hydrolyzed PSDA, R-PDSA and R-EVE matrix spike recoveries were above 200% for
48%,43%and 19%,respectively,of the results per compound

Matrix Interference During Analysis of Table 3+ Compounds
31 July 2020
Page 5
o Matrix spike recoveries above 200% for the remaining 16 compounds ranged from 5%to
0%of the results per compound
• Plant tissue
o There are matrix spike data for 19 of 24 compounds
• There were no data for MMF and DFSA
o R-PDSA, R-EVE and Hydrolyzed PSDA, matrix spike recoveries were above 200% for
89%, 89%and 78%,respectively,of the results per compound
o Matrix spike recoveries above 200%for the remaining 16 compounds ranged from 11%to
0%of the results per compound
• Other solids
o There are matrix spike data for 20 of 24 compounds
• There were no data for MMF and DFSA
o Hydrolyzed PSDA, R-PDSA and R-EVE matrix spike recoveries were above 200% for
34%, 31%and 17%,respectively,of the results per compound
o Matrix spike recoveries above 200%for the remaining 17 compounds ranged from 7%to
0%of the results per compound
Overall, the review of the historical matrix spike recovery data indicates that MMF, Hydrolyzed PSDA
(formerly BP5),R-PSDA(formerly BP4),DFSA and R-EVE are over-recovered at a much higher rate and
to a higher degree than the other Table 3+ compounds. This is the case across all environmental media
with the exception of soil and sediment; in soil and sediment,Hydrolyzed PSDA(formerly BP5),R-PSDA
(formerly BP4) and R-EVE matrix spike recoveries were nearly all below 200% while MMF and DFSA
were not analyzed.
Laboratory Matrix Interference Study of Table 3 Compounds
The percent recovery of the matrix spikes for each of the three parent samples (unamended river water,
river water amended with 100 ng/L of each of the current 20 Table 3+compound,and river water amended
with 500 ng/L of each of the current 20 Table 3+compounds)in the study(Table 4)and the four dilutions
of each parent compound(undiluted, 2x, 5x and 10x dilutions)was plotted in Figures 12, 13 and 14.Note
that while MMF and DFSA were identified as having matrix interference issues in the historical data set,
they were not analyzed as part of this study.MMF and DFSA were among a group of four compounds that
could not be accurately analyzed by the Table 3 SOP Method and are now analyzed by the Table 6 Method.
The ideal recovery of a compound in a matrix spike is 100%,with a range of 70-130%typically considered
acceptable.For R-PSDA(formerly BP4),Hydrolyzed PSDA(formerly BP5)and R-EVE,matrix spikes are
over-recovered,with higher recoveries observed in the less-diluted samples:
• For R-PSDA(formerly BP4),the matrix spike in the three parent samples for each dilution ranged
from:
o In the undiluted samples-548 to 599%;
o In the 2x diluted samples-339 to 372%;

Matrix Interference During Analysis of Table 3+ Compounds
31 July 2020
Page 6
o In the 5x diluted samples- 199 to 212%;
o In the 10x diluted samples- 157 to 181%;
• For Hydrolyzed PSDA (formerly BP5), the matrix spike in the three parent samples for each
dilution ranged from:
o In the undiluted samples-391 to 412%;
o In the 2x diluted samples-301 to 329%;
o In the 5x diluted samples- 199 to 214%;
o In the l Ox diluted samples- 161 to 179%;
• For R-EVE,the matrix spike in the three parent samples for each dilution ranged from:
o In the undiluted samples-346 to 376%;
o In the 2x diluted samples-221 to 249%;
o In the 5x diluted samples- 137 to 148%;
o In the I Ox diluted samples- 117 to 127%.
These results indicate that the measured concentrations of R-PSDA (formerly BP4), Hydrolyzed PSDA
(formerly BP5)and R-EVE are positively biased by the river water matrix,and as the river water matrix is
diluted,the degree of positive bias decreases.
For the remaining 17 compounds,the range of recovery is between 78 and 137%for all three parent samples
and all dilutions of each parent compound (with only 2 results above 130%), indicating that there is no
evidence for either positive or negative matrix interference for these 17 compounds.
The measured concentrations of the 20 Table 3+compounds in the parent samples and their dilutions were
plotted to assess the effect of the dilution of the matrix on the measured concentrations(Figures 15, 16 and
17). Note that these figures show concentrations on a logarithmic scale, and that the measured
concentrations account for the dilutions. If the concentration was below the reporting limit(which occurs
for some compounds in the unamended sample, especially at higher dilutions),the result was not plotted.
The expected concentrations in the three parent samples were:
• the unamended river water sample-based on previous sampling,the concentrations of the 20 Table
3+compounds were expected to range from below the reporting limit to up to roughly 100 ng/L;
• the river water amended with 100 ng/L of each of the 20 Table 3+compounds-the concentrations
of the 20 Table 3+compounds were expected to range from 100 ng/L to roughly 200 ng/L(i.e.,the
concentration already present in the river water plus the 100 ng/L added via the amendment); and
• the river water amended with 500 ng/L of each of the 20 Table 3+compounds-the concentrations
of the 20 Table 3+compounds were expected to range from 500 ng/L to roughly 600 ng/L(i.e.,the
concentration already present in the river water plus the 500 ng/L added via the amendment).

Matrix Interference During Analysis of Table 3+ Compounds
31 July 2020
Page 7
For 16 of the 20 compounds,the concentration for each parent sample is approximately the same regardless
of the dilution of the parent sample (unless the dilution is large enough that the concentration of the
compound falls below the reporting limit), as is expected if matrix interference is not a factor.
For 3 of the 20 compounds(R-PSDA(formerly BP4),Hydrolyzed PSDA(formerly BP5)and R-EVE),the
reported concentration in the parent sample is lower with each successive dilution(Table 5). The measured
concentrations appear to be positively biased by the river water matrix, and the degree of positive bias is
influenced by the degree of dilution of the river water matrix(i.e., as the river water matrix is diluted with
clean water, the degree of positive bias generated by the river water matrix decreases). The degree of the
positive bias is not influenced by the concentrations of the compounds examined in this study (i.e., from
low ng/L to 500 or 600 ng/L). The measured concentrations in undiluted river water appear to be
approximately 4.3 to 4.6 times the true concentration for R-PSDA (formerly BP4), approximately 2.5 to
3.3 times the true concentration for Hydrolyzed PSDA(formerly BP5)and approximately 2.2 to 3.0 times
the true concentration for R-EVE.
For 1 of the 20 compounds(PMPA),the data for appear to show the inverse effect. Concentrations appear
to increase with increasing dilution. This has been traced to a slight contamination of PMPA in the
laboratory water(as indicated by method blanks),which is amplified when laboratory water is added to the
samples during the dilution steps. In this study(and in the historical data set),PMPA did not show positive
matrix interference.
DISCUSSION
The most significant finding of this matrix interference data review is that a positive bias has been observed
� g
for MMF, DFSA, R-PSDA (formerly BP4), Hydrolyzed PSDA (formerly BP5) and R-EVE in most
environmental media and at a wide range of concentrations:
• In the historical data set, MMF, Hydrolyzed PSDA (formerly BP5), R-PSDA (formerly BP4),
DFSA and R-EVE are over-recovered at a much higher rate and to a higher degree than the other
Table 3+compounds. This was the case across all environmental media with the exception of soil
and sediment;
• In the laboratory matrix interference study, reported concentrations for R-PSDA (formerly BP4),
Hydrolyzed PSDA (formerly BP5) and R-EVE may be up to 4.6 times higher than the true
concentrations, as shown in the laboratory matrix interference study. Note MMF and DFSA were
not part of this study.
Positive matrix interference was also observed for PFMOAA in the historical data set;however,to a lesser
degree than the above compounds. No matrix interference was observed for PFMOAA in the laboratory
study.
The exact mechanism of positive matrix interference is not presently understood; however, MMF, DFSA,
R-PSDA (formerly BP4), Hydrolyzed PSDA (formerly BP5) and R-EVE are the only diprotic acid

•
Matrix Interference During Analysis of Table 3+ Compounds
31 July 2020
Page 8
compounds(i.e.,compounds that can generate two hydrogen ions per molecule)in the list of 24 compounds
that have been analyzed by the Table 3 Method and hence it is possible that the diprotic nature of these five
compounds contributes to the positive matrix interference. It is also possible that monoprotic acid
compounds(i.e., compounds that can generate one hydrogen ion per molecule)are also subject to positive
matrix interference; PFMOAA is a monoprotic acid and yet showed positive matrix interference in the
historical data set, albeit it to a lesser degree than MMF, DFSA, R-PSDA (formerly BP4), Hydrolyzed
PSDA(formerly BP5)and R-EVE.
RECOMMENDATIONS
The Table 3 Method cannot accurately report MMF,DFSA,R-PSDA(formerly BP4), Hydrolyzed PSDA
(formerly BP5)and R-EVE concentrations due to positive bias from matrix interference.This memorandum
provides evidence that MMF,DFSA, R-PSDA(formerly BP4),Hydrolyzed PSDA(formerly BP5)and R-
EVE should no longer be included in the Table 3 Method because they are unreliably quantitated by the
Table 3 Method. Chemours will explore alternative means of analyzing MMF,DFSA,R-PSDA(formerly
BP4), Hydrolyzed PSDA (formerly BP5) and R-EVE in consultation with its chemists and commercial
laboratories.
Additionally,this memorandum recommends a method for using existing MMF,DFSA,R-PSDA(formerly
BP4),Hydrolyzed PSDA(formerly BP5)and R-EVE data that have been generated by Method Table 3.R-
PSDA (formerly BP4), Hydrolyzed PSDA (formerly BP5) and R-EVE concentrations provided by the
Table 3 Method should be considered over-estimates of the true concentrations and should be used with
caution. If the Table 3+ compounds are being summed together,the summing should be performed both
with and without these compounds. For the current list of 20 Table 3+ compounds. the sum of all 20
compounds(including R-PSDA(formerly BP4),Hydrolyzed PSDA(formerly BP5) and R-EVE) is likely
an overestimate of the actual value while the sum of the 17 compounds(excluding R-PSDA(formerly BP4),
Hydrolyzed PSDA(formerly BP5) and R-EVE) is likely closer to the true value. Expressing these data as
a range represents the range of what these results might be without matrix interference. Similarly, data for
MMF and DFSA exist in the historical data set,but these compounds(along with PPF Acid and MTP)were
removed from the list of Table 3+compounds in June 2019 due to other uncertainties in their analysis by
the Table 3 Method. If the historical MMF and DFSA results are to be used,the concentrations should be
considered over-estimates of the true concentrations and should be used with caution.

Matrix Interference During Analysis of Table 3+ Compounds
31 July 2020
Page 9
Attachments
Table 1: Names and CAS Numbers for Table 3+Compounds
Table 2: Matrix Spike Recoveries for Table 3+Compounds-Historical Data Set
Table 3: Matrix Spike Recoveries for Table 3+ Compounds - Historical Data Set by Environmental
Media
Table 4: Matrix Spike Recoveries for Table 3+Compounds-Laboratory Matrix Interference Study
Table 5: Measured versus Expected Concentrations for Laboratory Matrix Interference Study Samples
Figure 1: Percent of Matrix Spike Recoveries Above 200%in Historical Data Set
Figure 2: Percent of Matrix Spike Recoveries Below 20%in Historical Data Set
Figure 3: Percent of Matrix Spike Recoveries Above 200%in Historical Data Set for Groundwater
Figure 4: Percent of Matrix Spike Recoveries Above 200%in Historical Data Set for Surface Water
Figure 5: Percent of Matrix Spike Recoveries Above 200%in Historical Data Set for Drinking Water
Figure 6: Percent of Matrix Spike Recoveries Above 200%in Historical Data Set for Other Liquids
Figure 7: Percent of Matrix Spike Recoveries Above 200%in Historical Data Set for Soils
Figure 8: Percent of Matrix Spike Recoveries Above 200%in Historical Data Set for Sediments
Figure 9: Percent of Matrix Spike Recoveries Above 200%in Historical Data Set for Animal Tissue
Figure 10: Percent of Matrix Spike Recoveries Above 200%in Historical Data Set for Plant Tissue
Figure 11: Percent of Matrix Spike Recoveries Above 200%in Historical Data Set for Other Solids
Figure 12: Matrix Spike Recoveries for Unamended River Water
Figure 13: Matrix Spike Recoveries for River Water Amended with 100 ng/L of Each Compound
Figure 14: Matrix Spike Recoveries for River Water Amended with 500 ng/L of Each Compound
Figure 15: Measured Concentration for Unamended River Water
Figure 16: Measured Concentration for River Water Amended with 100 ng/L of Each Compound
Figure 17: Measured Concentration for River Water Amended with 500 ng/L of Each Compound
Attachment 1: Reduction in Frequency of Sample Duplicates and Matrix Spikes for Analysis of Table 3+
PFAS (January 24, 2020)
References
USEPA, 2017. National Functional Guidelines for Organic Superfund Methods Data Review. EPA-540-
R-2017-002,January 2017.

TABLE 1 Geosyntec Consultants of NC P.C.
NAMES AND CAS NUMBERS FOR TABLE 3+COMPOUNDS
Chemours Fayetteville Works,North Carolina
Common Name Chemical Name CASN
MMF* Difluoromalonic acid 1514-85-8
DFSA* Difluorosulfoacetic acid 422-67-3
Hydrolyzed PSDA(formerly BP5) Acetic acid,2-fluoro-2-[1,1,2,3,3,3-hexafluoro-2-(1,1,2,2-tetrafluoro-2-sulfoethoxy)propoxy]- 2416366-19-1
R-PSDA(formerly BP4) Pentanoic acid,2,2,3,3,4,5,5,5-octafluoro-4-(1,1,2,2-tetrafluoro-2-sulfoethoxy)- 2416366-18-0
R-EVE Pentanoic acid,4-(2-carboxy-1,1,2,2-tetrafluoroethoxy)-2,2,3,3,4,5,5,5-octafluoro- 2416366-22-6
PFMOAA Perfluoro-2-methoxyacetic acid 674-13-5
EVE Acid 2,2,3,3-tetrafluoro-3-({1,1,1,2,3,3-hexafluoro-3-[(1,2,2-trifluoroethenyl)oxy]propan-2-y1}oxy)propionic acid 69087-46-3
R-PSDCA(formerly BP6) Pentanoic acid,2,2,3,3,4,5,5,5-octafluoro-4-(1,1,2,2-tetrafluoro-2-sulfoethoxy)- 2416366-18-0
HFPO-DA Hexafluoropropylene oxide dimer acid 13252-13-6
Ilydro-EVE Acid 2,2,3,3-tetrafluoro-3-({1,1,1,2,3,3-hexafluoro-3-[(1,2,2,2-tetrafluoroethyl)oxy]propan-2-yl}oxy)propionicacid 773804-62-9
MTP* 3-methoxy-2,2,3,3-tetrafluoropropanoic acid 93449-21-9
NVHOS 1,1,2,2,4,5,5,5-heptafluoro-3-oxapentanesulfonic acid;or 2-(1,2,2,2-ethoxy)tetrafluoroethanesulfonic acid;or 1-
1132933-86-8
(1,1,2,2-tetrafluoro-2-sulfoethoxy)-1,2,2,2-tetafluoroethane
TR0795 Page 1 of 2 July 2020

TABLE 1 Geosyntec Consultants of NC P.C.
NAMES AND CAS NUMBERS FOR TABLE 3+COMPOUNDS
Chemours Fayetteville Works,North Carolina
Common Name Chemical Name CASN
PEPA Perfluoro-2-ethoxypropionic acid 267239-61-2
PES Perfluoro-2-ethoxyethanesulfonic acid 113507-82-7
PFECA B Perfluoro-3,6-dioxaheptanoic acid 151772-58-6
PFECA-G Perfluoro-4-isopropoxybutanoic acid 801212-59-9
PS Acid(formerly PFESA-BPI) Ethanesulfonic acid,2-[1-[difluoro[(1,2,2-trifluoroethenyl)oxy]methyl]-1,2,2,2-tetrafluoroethoxy]-1,1,2,2- 29311-67-9
tetrafluoro-
Hydro-PS Acid(formerly PFESA-BP2) Ethanesulfonic acid,2-[1-[difluoro(1,2,2,2-tetrafluoroethoxy)methyl]-1,2,2,2-tetrafluoroethoxy]-1,1,2,2-tetrafluoro- 749836-20-2
PFO2HxA Perfluoro-3,5-dioxahexanoic acid 39492-88-1
PFO3OA Perfluoro-3,5,7-trioxaoctanoic acid 39492-89-2
PFO4DA Perfluoro-3,5,7,9-tetraoxadecanoic acid 39492-90-5
PFO5DA Perfluoro-3,5,7,9,11-pentaoxadodecanoic acid 39492-91-6
PMPA Perfluoro-2-methoxypropionic acid 1 3 1 40-29-9
Acid* Perfluoropropionic acid 422-64-0
Notes:
CASN-Chemical Abstracts Service Number
* -compound is not currently analyzed by the Table 3 Method
TR0795 Page 2 of 2 July 2020

TABLE 2 Geosyntec Consultants of NC P.C.
MATRIX SPIKE RECOVERIES FOR TABLE 3+COMPOUNDS-HISTORICAL DATA SET
Chemours Fayetteville Works,North Carolina
Results of Matrix Spike Recoveries
Total Number
Compound of Matrix Spike Number of Matrix Spike Recoveries Percentage of Matrix Spike Recoveries
Recoveries Between 20% Between 20%
<20% >200% <20% >200%
and 200%* and 200%* _
MIME** 80 36 3 41 45% 4% 51%
DFSA** 80 58 3 19 73% 4% 24%
Hydrolyzed PSDA 915 636 71 208 70% 8% 23%
R-PSDA 915 675 65 175 74% 7% 19%
R-EVE 915 704 63 148 77% 7% 16%
PFMOAA 1641 1469 114 58 90% 7% 4%
EVE Acid 915 892 16 7 97% 2% 1%
R-PSDCA 915 901 11 3 98% 1% 0%
HFPO-DA 26 26 0 0 100% 0% 0%
Hydro-EVE Acid 915 895 11 9 98% 1% 1%
MTP** 80 78 1 1 98% 1% 1%
NVHOS 915 888 22 5 97% 2% 1%
PEPA 1416 1333 64 19 94% 5% 1%
PES 915 890 23 2 97% 3% 0%
PFECA B 915 890 23 2 97% 3% 0%
PFECA-G 1641 1573 67 1 96% 4% 0%
PS Acid 1641 1527 98 16 93% 6% 1%
Hydro-PS Acid 1641 1562 69 10 95% 4% 1%
PFO2HxA 1641 1506 95 40 92% 6% 2%
PFO3OA 1641 1536 82 23 94% 5% 1%
PFO4DA 1641 1550 79 12 94% 5% 1%
PFOSDA 1641 1537 89 15 94% 5% 1%
PMPA 1641 1512 97 32 92% 6% 2%
PPFAcid** 80 77 2 1 96% 3% 1%
Notes:
* -for the purposes of this matrix interference study,matrix spike recoveries between 20%and 200%are
considered acceptable
** -compound is not currently analyzed by the Table 3 Method
-percent
TR0795 July 2020

TABLE 3 Geosyntec Consultants of NC P.C.
MATRIX SPIKES RECOVERIES FOR TABLE 3+COMPOUND-HISTORICAL DATA SET BY ENVIRONMENTAL MEDIA
Chemours Fayetteville Works,North Carolina
Total Number Results of Matrix Spike Recoveries
of Matrix Number of Matrix Spike Recoveries Percentage of Matrix Spike Recoveries
Compound Sample Media Spike Between Between 20%
Recoveries 20%and <20% >200% and 200%* <20% >200%
200%*
Groundwater 8 1 0 7 13% 0% 88%
Surface Water 52 20 1 31 38% 2% 60%
Drinking Water 0 -- -- -- -- -- --
Other liquid 20 15 2 3 75% 10% 15%
MA-1P** Soil 0 -- -- -- -- -- --
Sediment 0 -- -- -- -- -- --
Animal tissue 0 -- -- -- -- -- --
Plant Tissue 0 -- -- -- -- -- --
Other solid 0 -- -- -- -- -- --
Groundwater 8 5 2 1 63% 25% 13%
Surface Water 52 34 I 17 65% 2% 33%
Drinking Water 0 -- -- -- -- -- --
Other liquid 20 19 0 1 95% 0% 5%
DFSA** Soil 0 -- -- -- -- -- --
Sediment 0 -- -- -- -- -- --
Animal tissue 0 -- -- -- -- -- —
Plant Tissue 0 -- -- -- -- -- —
Other solid 0 -- -- -- -- -- --
Groundwater 179 149 12 18 83% 7% 10%
Surface Water 396 248 12 _ 136 63% 3% 34% _
Drinking Water 0 -- -- -- — -- --
Hydrolyzed PSDA Other liquid 183 157 0 26 86% 0% 14%
Soil 72 34 37 I 47% 51% 1%
Sediment 26 16 10 0 62% 38% 0%
Animal tissue 21 11 0 10 52% 0% 48%
Plant Tissue 9 2 0 7 22% 0% 78%
Other solid 29 19 0 10 66% 0% 34%
TR0795 Page 1 of 8 July 2020

TABLE 3 Geosyntec Consultants of NC P.C.
MATRIX SPIKES RECOVERIES FOR TABLE 3+COMPOUND-HISTORICAL DATA SET BY ENVIRONMENTAL MEDIA
Chemours Fayetteville Works,North Carolina
Total Number Results of Matrix Spike Recoveries
of Matrix Number of Matrix Spike Recoveries Percentage of Matrix Spike Recoveries
Compound Sample Media Spike Between Between 20%
Recoveries 20%and <20% >200% and 200%* <20% >200%
200%*
Groundwater 179 154 10 15 86% 6% 8%
Surface Water 396 278 8 110 70% 2% 28%
Drinking Water 0 -- -- -- -- -- --
R-PSDA Other liquid 183 159 0 24 87% 0% 13%
Soil 72 34 38 0 47% 53% 0%
Sediment 26 17 9 0 65% 35% 0%
Animal tissue 21 12 0 9 57% 0% 43%
Plant Tissue 9 1 0 8 11% _ 0% 89%
Other solid 29 20 0 9 69% 0% 31%
Groundwater 179 158 11 10 88% 6% 6%
Surface Water 396 290 6 100 73% 2% 25%
Drinking Water 0 -- -- -- -- -- --
Other liquid 183 162 0 21 89% 0% 11%
R-EVE Soil 72 35 37 0 49% 51% 0%
Sediment 26 17 9 0 65% 35% 0%
Animal tissue 21 17 0 4 81% 0% 19%
Plant Tissue 9 1 0 8 11% 0% 89%
Other solid 29 24 0 5 83% 0% 17%
Groundwater 295 215 51 29 73% 17% 10%
Surface Water 493 443 30 20 90% 6% 4%
Drinking Water 458 451 5 2 98% 1% 0.4%
Other liquid 219 ")15 3 1 98% 1% 0%
PFMOAA Soil 91 77 11 3 85% 12% 3%
Sediment 26 22 2 2 85% 8% 8%
Animal tissue 21 16 4 1 76% 19% 5%
Plant Tissue 9 2 7 0 22% 78% 0%
Other solid 29 28 I 0 97% 3% 0%
TR0795 Page 2 of 8 July 2020

TABLE 3 Geosyntec Consultants of NC P.C.
MATRIX SPIKES RECOVERIES FOR TABLE 3+COMPOUND-HISTORICAL DATA SET BY ENVIRONMENTAL MEDIA
Chemours Fayetteville Works,North Carolina
Total Number Results of Matrix Spike Recoveries
of Matrix Number of Matrix Spike Recoveries Percentage of Matrix Spike Recoveries
Compound Sample Media Between °
Spike Between 20/o
Recoveries 20%and <20% >200% and 200%* <20% >200%
200%*
Groundwater 179 168 9 2 94% 5% 1%
Drinking Water 0 -- -- -- -- -- --
Surface Water 396 389 3 4 98% 1% 1%
Other liquid 183 183 0 0 100% 0% 0%
EVE Acid Soil 72 69 3 0 96% 4% 0%
Sediment 26 25 1 0 96% 4% 0%
Animal tissue 21 21 0 0 100% 0% 0%
Plant Tissue 9 8 0 1 89% 0% 11%
Other solid 29 29 0 0 100% 0% 0%
Groundwater 179 173 5 1 97% 3% 1%
Surface Water 396 393 2 1 99% 1% 0.3%
Drinking Water 0 -- -- -- -- -- --
Other liquid 183 183 0 0 100% 0% 0%
R-PSDCA Soil 72 69 3 0 96% 4% 0%
Sediment 26 25 1 0 96% 4% 0%
Animal tissue 21 21 0 0 100% 0% 0%
Plant Tissue 9 8 0 1 89% 0% 11%
Other solid 29 29 0 0 100% 0% 0%
Groundwater 0 -- -- -- -- -- --
Surface Water 0 -- -- -- -- -- --
Drinking Water 0 -- -- -- -- -- --
Other liquid 1 1 0 0 100% 0% 0%
Hfpo Dimer Acid Soil 0 -- -- -- -- -- --
Sediment 0 -- -- -- -- -- --
Animal tissue 0 -- -- -- -- -- --
Plant Tissue 0 -- -- -- -- -- --
Other solid 25 25 0 0 100% 0% 0%
TR0795 Page 3 of 8 July 2020

TABLE 3 Geosyntec Consultants of NC P.C.
MATRIX SPIKES RECOVERIES FOR TABLE 3+COMPOUND-HISTORICAL DATA SET BY ENVIRONMENTAL MEDIA
Chemours Fayetteville Works,North Carolina
Total Number Results of Matrix Spike Recoveries
of Matrix Number of Matrix Spike Recoveries Percentage of Matrix Spike Recoveries
Compound Sample Media Spike Between Between 20%
Recoveries 20%and <20% >200% and 200%* <20% >200%
200%*
Groundwater 179 170 6 3 95% 3% 2%
Surface Water 396 388 3 5 98% 1% 1%
Drinking Water 0 -- -- -- -- -- --
Other liquid 183 183 0 0 100% 0% 0%
Hydro-EVE Acid Soil 72 71 1 0 99% 1% 0%
Sediment 26 25 1 0 96% 4% 0%
Animal tissue 21 21 0 0 100% 0% 0%
Plant Tissue 9 8 0 1 89% 0% 11%
Other solid 29 29 0 0 100% 0% 0%
Groundwater 8 8 0 0 100% 0% 0%
Surface Water 52 50 1 1 96% 2% 2%
Drinking Water 0 -- -- -- -- -- --
Other liquid 20 20 0 0 100% 0% 0%
MTP** Soil 0 -- -- -- -- -- --
Sediment 0 -- -- -- -- -- --
Animal tissue 0 -- -- -- -- -- --
Plant Tissue 0 -- -- -- -- -- --
Other solid 0 -- -- -- -- -- --
Groundwater 179 167 10 2 93% 6% 1%
Surface Water 396 385 9 2 97% 2% 1%
Drinking Water 0 -- -- -- -- -- --
Other liquid 183 183 0 0 100% 0% 0%
NVHOS Soil 72 72 0 0 100% 0% 0%
Sediment 26 25 1 0 96% 4% 0%
Animal tissue 21 21 0 0 100% 0% 0%
Plant Tissue 9 6 2 1 67% 22% 11%
Other solid 29 29 0 0 100% 0% 0%
TR0795 Page 4 of 8 July 2020

TABLE 3 Geosyntec Consultants of NC P.C.
MATRIX SPIKES RECOVERIES FOR TABLE 3+COMPOUND-HISTORICAL DATA SET BY ENVIRONMENTAL MEDIA
Chemours Fayetteville Works,North Carolina
Total Number Results of Matrix Spike Recoveries
of Matrix Number of Matrix Spike Recoveries Percentage of Matrix Spike Recoveries
Compound Sample Media Spike Between Between 20%
Recoveries 20%and <20% >200% and 200%* <20% >200%
200%*
Groundwater 209 174 29 6 83% 14% 3%
Surface Water 429 400 20 9 93% 5% 2%
Drinking Water 393 385 5 3 98% 1% 1%
Other liquid 219 219 0 0 100% 0% 0%
PLPA Soil 81 73 8 0 90% 10% 0%
Sediment 26 24 2 0 92% 8% 0%
Animal tissue 21 21 0 0 100% 0% 0%
Plant Tissue 9 8 0 1 89% 0% 11%
Other solid 29 29 0 0 100% 0% 0%
Groundwater 179 166 13 0 93% 7% 0%
Surface Water 396 389 6 1 98% 2% 0.3%
Drinking Water 0 -- -- -- -- -- --
Other liquid 183 183 0 0 100% 0% 0%
PES Soil 72 69 3 0 96% 4% 0%
Sediment 26 25 1 0 96% 4% 0%
Animal tissue 21 21 0 0 100% 0% 0%
Plant Tissue 9 8 0 1 89% 0% 11%
Other solid 29 29 0 0 100% 0% 0%
Groundwater 179 165 14 0 92% 8% 0%
Surface Water 396 389 6 1 98% 2% 0.3%
Drinking Water 0 -- -- -- -- -- --
Other liquid 183 183 0 0 100% 0% 0%
PFECA B Soil 72 71 1 0 99% 1% 0%
Sediment 26 25 1 0 96% 4% 0%
Animal tissue 21 21 0 0 100% 0% 0%
Plant Tissue 9 7 1 1 78% 11% 11%
Other solid 29 29 0 0 100% 0% 0%
FR0795 Page 5 of 8 July 2020

TABLE 3 Geosyntec Consultants of NC P.0
MATRIX SPIKES RECOVERIES FOR TABLE 3+COMPOUND-HISTORICAL DATA SET BY ENVIRONMENTAL MEDIA
Chemours Fayetteville Works,North Carolina
Total Number Results of Matrix Spike Recoveries
of Matrix Number of Matrix Spike Recoveries Percentage of Matrix Spike Recoveries
Compound Sample Media Spike Between Between 20%
Recoveries 20%and <20% >200% and 200%* <20% >200%
200%
Groundwater 295 260 35 0 88% 12% 0%
Surface Water 493 480 12 1 97% 2% 0.2%
Drinking Water 458 453 5 0 99% 1% 0%
Other liquid 219 219 0 0 100% 0% 0%
PFECA-G Soil 91 81 10 0 89% 11% 0%
Sediment 26 24 2 0 92% 8% 0%
Animal tissue 21 18 3 0 86% 14% 0%
Plant Tissue 9 9 0 0 100% 0% 0%
Other solid 29 29 0 0 100% 0% 0%
Groundwater 295 252 33 10 85% 11% 3%
Surface Water 493 466 22 5 95% 4% _ 1%
Drinking Water 458 441 17 0 96% 4% 0%
Other liquid 219 219 0 0 100% 0% 0%
PS Acid Soil 91 68 23 0 75% 25% 0%
Sediment 26 23 3 0 88% 12% 0%
Animal tissue 21 21 0 0 100% 0% 0%
Plant Tissue 9 8 0 1 89% 0% 11%
Other solid 29 29 0 0 100% 0% 0%
Groundwater 295 261 31 3 88% 11% 1%
Surface Water 493 473 14 6 96% 3% I%
Drinking Water 458 450 8 0 98% 2% 0%
Other liquid 219 219 0 0 100% 0% 0%
Hydro-PS Acid Soil 91 76 15 0 84% 16% 0%
Sediment 26 25 1 0 96% 4% 0%
Animal tissue 21 21 0 0 100% 0% 0%
Plant Tissue 9 8 0 1 89% 0% 11%
Other solid 29 29 0 0 100% 0% 0%
1 R0795 Page 6 of 8 July 2020

TABLE 3 Geosyntec Consultants of NC P.C.
MATRIX SPIKES RECOVERIES FOR TABLE 3+COMPOUND-HISTORICAL DATA SET BY ENVIRONMENTAL MEDIA
Chemours Fayetteville Works,North Carolina
Total Number Results of Matrix Spike Recoveries
of Matrix Number of Matrix Spike Recoveries Percentage of Matrix Spike Recoveries
Compound Sample Media Spike Between Between 20%
Recoveries 20%and <20% >200% and * <20% >200%
200200%
Groundwater 295 230 44 21 78% 15% 7%
Surface Water 493 452 30 _ 11 92% 6% 2%
Drinking Water 458 440 13 5 96% 3% 1%
Other liquid 219 218 0 1 100% 0% 0%
PFO2HxA Soil 91 84 6 1 92% 7% 1%
Sediment 26 23 2 1 88% 8% 4%
Animal tissue 21 21 0 0 100% 0% 0%
Plant Tissue 9 9 0 0 100% 0% 0%
Other solid 29 29 0 0 100% 0% 0%
Groundwater 295 240 39 16 81% 13% 5%
Surface Water 493 459 29 5 93% 6% 1%
Drinking Water 458 454 4 0 99% 1% 0%
Other liquid 219 218 0 1 100% 0% 0.5%
PFO3OA Soil 91 83 8 0 91% 9% 0%
Sediment 26 24 2 0 92% 8% 0%
Animal tissue 21 21 0 0 100% 0% 0%
Plant Tissue 9 8 0 1 89% 0% 11%
Other solid 29 29 0 0 100% 0% 0%
Groundwater 295 252 39 4 85% 13% 1%
Surface Water 493 468 21 4 95% 4% 1%
Drinking Water 458 453 5 0 99% 1% 0%
Other liquid 219 219 0 0 100% 0% 0%
PFO4DA Soil 91 82 9 0 90% 10% 0%
Sediment 26 24 2 0 92% 8% 0%
Animal tissue 21 17 3 1 81% 14% 5%
Plant Tissue 9 8 0 I 89% 0% 11%
Other solid 29 27 0 2 93% 0% 7%
FR0795 Page 7 of 8 July 2020

TABLE 3 Geosyntec Consultants of NC P.C.
MATRIX SPIKES RECOVERIES FOR TABLE 3+COMPOUND-HISTORICAL DATA SET BY ENVIRONMENTAL MEDIA
Chemours Fayetteville Works,North Carolina
Total Number Results of Matrix Spike Recoveries
of Matrix Number of Matrix Spike Recoveries Percentage of Matrix Spike Recoveries
Compound Sample Media Spike Between Between 20%
Recoveries 20%and <20% >200% and 200%* <20% >200%200%*
Groundwater 295 250 39 6 85% 13% 2%
Surface Water 493 465 20 8 94% 4% 2%
Drinking Water 458 443 15 0 97% 3% 0%
Other liquid 219 219 0 0 100% 0% 0%
PFO5DA Soil 91 79 11 1 87% 12% 1%
Sediment 26 22 4 0 85% 15% 0%
Animal tissue 21 21 0 0 100% 0% 0%
Plant Tissue 9 9 0 0 100% 0% 0%
Other solid 29 29 0 0 100% 0% 0%
Groundwater 295 245 41 9 83% 14% 3%
Surface Water 493 455 29 9 92% 6% 2%
Drinking Water 458 433 14 11 95% 3% 2%
Other liquid 219 218 1 0 100% 0.5% 0%
PNIPA Soil 91 81 8 2 89% 9% 2%
Sediment 26 22 3 1 85% 12% 4%
Animal tissue 21 21 0 0 100% 0% 0%
Plant Tissue 9 8 1 0 89% 11% 0%
Other solid 29 29 0 0 100% 0% 0%
Groundwater 8 8 0 0 100% 0% 0%
Surface Water 52 49 2 1 94% 4% 2%
Drinking Water 0 -- 0 -- -- -- --
Other liquid 20 20 0 0 100% 0% 0%
PPF Acid** Soil 0 -- -- -- -- -- --
Sediment 0 -- -- -- -- -- --
Animal tissue 0 — -- -- -- -- --
Plant Tissue 0 — -- -- -- -- --
Other solid 0 -- -- -- -- -- --
Notes:
* -for the purposes of this assessement,matrix spike recoveries between 20%and 200%are considered acceptable
** -compound is not currently analyzed by the Table 3 Method
-percent
TR0795 Page 8 of 8 July 2020

TABLE 4 Geosyntec Consultants of NC P.C.
MATRIX SPIKE RECOVERIES FOR TABLE 3+COMPOUNDS-LABORATORY MATRIX INTERFERENCE STUDY
Chemours Fayetteville Works,North Carolina
Measured
Measured Concentration
Compound Dilution in Parent Sample Matrix Spike Concentration in Matrix Spike
Added(ng/L) Matrix Spike Recovery(/o)
Parent Sample (ng/L) Sample(ng/L)
lx 34 200 1130 548
2x 23 400 1510 372
Unamended River Sample
5x <7.9 1000 2120 212
10x <16 2000 3620 181
lx 500 200 1690 599
R-PSDA River Sample Amended with 2x 340 400 1700 339
100 ng/L of Each Compound 5x 210 1000 2200 199
10x 150 2000 3480 166
lx 2200 200 3400 579
River Sample Amended with 2x 1400 400 2920 371
500 ng/L of Each Compound 5x 910 1000 2960 205
10x 730 2000 3870 157
lx 34 200 816 391
Unamended River Sample 2x 27 400 1290 315
5x 16 1000 2040 202
10x 14 2000 3590 179
lx 370 200 1200 412
Hydrolyzed PSDA River Sample Amended with 2x 310 400 1510 301
100 ng/L of Each Compound 5x 200 1000 2190 199
10x 150 2000 3550 170
lx 1700 200 2510 398
River Sample Amended with 2x 1300 400 2630 329
500 ng/L of Each Compound 5x 880 1000 3020 214
10x 690 2000 3910 161
lx 7.7 200 701 346
Unamended River Sample 2x 4.4 400 960 239
5x <3.5 1000 1420 142
10x <7.0 2000 2550 127
lx 310 200 1060 376
River Sample Amended with 2x 220 400 1110 221
IZ-h 1. 100 ng/L of Each Compound 5x 140 1000 1510 137
10x 110 2000 2500 120
lx 1500 200 2160 349
River Sample Amended with 2x 950 400 1950 249
500 ng/L of Each Compound 5x 600 1000 2080 148
10x 530 2000 2870 117
TR0795 Page 1 of7 July 2020

TABLE 4 Geosyntec Consultants of NC P.C.
MATRIX SPIKE RECOVERIES FOR TABLE 3+COMPOUNDS-LABORATORY MATRIX INTERFERENCE STUDY
Chemours Fayetteville Works,North Carolina
Measured Concentration Measured
Compound Dilution in Parent Sample Matrix Spike Concentration in Matrix Spike
n Added(ng/L) Matrix Spike Recovery(/o)
Parent Sample (ng/L)
Sample(ng/L)
lx 3.2 200 207 102
Unamended River Sample 2x 3.0 400 432 107
5x <2.0 1000 1060 106
10x <2.7 2000 2150 107
lx 100 200 315 106
River Sample Amended with 2x 110 400 529 106
PS Acid 100 ng/L of Each Compound 5x 98 1000 1140 105
10x 110 2000 2290 109
lx 470 200 659 93
River Sample Amended with • 2x 500 400 913 104
500 ng/L of Each Compound 5x 480 1000 1580 110
10x 510 2000 2530 101
lx 2.2 200 208 103
Unamended River Sample 2x 2.0 400 405 101
5x 2.1 1000 1000 100
10x <3.0 2000 2130 107
lx 98 200 302 102
Hydro-PS Acid River Sample Amended with 2x 100 400 500 100
l00 ng/L of Each Compound 5x 99 1000 1100 100
10x 100 2000 2170 103
lx 450 200 637 95
River Sample Amended with 2x 450 400 873 106
500 ng/L of Each Compound 5x 460 1000 1490 103
10x 470 2000 2440 99
lx <2.0 200 222 111
Unamended River Sample 2x <2.0 400 437 109
5x <16 1000 1050 105
10x <2.0 2000 2180 109
lx 99 200 312 107
R-PSDCA River Sample Amended with 2x 100 400 520 105
100 ng/L of Each Compound 5x 99 1000 1120 102
10x 100 2000 2310 110
lx 460 200 623 80
River Sample Amended with 2x 490 400 881 98
500 ng/L of Each Compound 5x 480 1000 1530 105
10x 490 2000 2590 105
1R0795 Page 2 of 7 July 2020

TABLE 4 Geosyntec Consultants of NC P.C.
MATRIX SPIKE RECOVERIES FOR TABLE 3+COMPOUNDS-LABORATORY MATRIX INTERFERENCE STUDY
Chemours Fayetteville Works,North Carolina
Measured
1easured Concentration Matrix Spike Concentration in Matrix Spike
Compound Dilution in Parent Sample u
(ng/L) Added(ng/L) Matrix Spike Recovery(/o)
Parent Sample Sample(ng/L)
Ix <2.0 200 233 116
Unamended River Sample 2x <2.0 400 484 121
5x <2.0 1000 1180 118
10x <2.4 2000 2410 120
lx 110 200 347 118
EVE Acid River Sample Amended with 2x I I() 400 578 116
100 ng/L of Each Compound 5x 110 1000 1220 111
10x 110 2000 2440 116
lx 500 200 667 85
River Sample Amended with 2x 530 400 946 104
500 ng/L of Each Compound 5x 520 1000 1750 123
10x 550 2000 2900 117
lx 34 200 242 104
Unamended River Sample 2x 35 400 462 107
5x 35 1000 1070 103
10x 41 2000 2260 111
lx 130 200 338 104
HFPO-DA River Sample Amended with 2x 130 400 534 101
100 ng/L of Each Compound 5x 130 1000 1120 99
10x 130 2000 2290 108
lx 480 200 671 97
River Sample Amended with 2x 490 400 877 96
500 ng/L of Each Compound 5x 490 1000 1500 101
10x 500 2000 2490 100
lx <2.0 200 213 106
2x <2.0 400 417 104
Unamended River Sample
5x <2.0 1000 1040 104
10x <2.8 2000 2130 107
lx 97 200 300 101
Hydro-EVE Acid River Sample Amended with 2x 99 400 491 98
100 ng/L of Each Compound 5x 100 1000 1090 99
10x 100 2000 2240 107
lx 460 200 623 83
River Sample Amended with 2x 470 400 853 97
500 ng/L of Each Compound 5x 470 1000 1450 98
10x 460 2000 2450 99
TR0795 Page 3 of 7 July 2020

TABLE 4 Geosyntec Consultants of NC P.C.
MATRIX SPIKE RECOVERIES FOR TABLE 3+COMPOUNDS-LABORATORY MATRIX INTERFERENCE STUDY
Chemours Fayetteville Works,North Carolina
Measured Concentration Measured
Compound Dilution in Parent Sample Matrix Spike Concentration in Matrix Spike
Added(ng/L) Matrix Spike Recovery(%)
° Sample /L
Parent Sample n( P (ng/L)
lx 5.4 200 214 104
Unamended River Sample 2x 5.1 400 425 105
5x 5.7 1000 1040 103
10x 6.0 2000 2180 109
River Sample Amended lx 100 200 312 104
NVHOS with 100 ng/L 2x 100 400 502 100
of Each Compound 5x 100 1000 1120 102
10x 100 2000 2240 107
River Sample Amended lx 470 200 674 104
with 500 ng/L 2x 480 400 879 100
of Each Compound 5x 470 1000 1520 104
10x 490 2000 2540 103
lx <20 200 182 86
Unamended River Sample 2x <20 400 356 86
5x <20 1000 883 87
10x <92 2000 1870 93
lx 92 200 269 88
River Sample Amended with 2x 92 400 449 89
PEPA 100 ng/L of Each Compound 5x 90 1000 954 86
10x 97 2000 1940 92
lx 390 200 578 92
River Sample Amended with 2x 420 400 767 88
500 ng/L of Each Compound 5x 410 1000 1290 87
10x 420 2000 2220 90
lx <2.0 200 232 116
Unamended River Sample
2x <2.0 400 451 113
5x <2.3 1000 1120 112
10x <4.6 2000 2350 117
lx 110 200 342 118
River Sample Amended with 2x 110 400 570 115
PES 100 ng/L of Each Compound 5x 110 1000 1220 111
10x 110 2000 2520 120
lx 520 200 718 99
River Sample Amended with 2x 520 400 976 114
500 ng/L of Each Compound 5x 530 1000 1700 117
10x 540 2000 2900 118
1R0795 Page 4 of 7 July 2020

TABLE 4 Geosyntec Consultants of NC P.C.
MATRIX SPIKE RECOVERIES FOR TABLE 3+COMPOUNDS-LABORATORY MATRIX INTERFERENCE STUDY
Chemours Fayetteville Works,North Carolina
Measured Concentration Measured
Compound Dilution in Parent Sample Matrix Spike Concentration in Matrix Spike
Added(ng/L) Matrix Spike Recovery(%)
° Sample(ng/L)
g/L)
Sample n( P ( � )
lx <2.0 200 214 107
Unamended River Sample 2x <2.0 400 444 111
5x <3.0 1000 1060 106
10x <6.0 2000 2190 109
lx 100 200 326 111
PFECA B River Sample Amended with 2x 100 400 544 110
100 ng/L of Each Compound 5x 110 1000 1150 104
10x 110 2000 2400 115
lx 500 200 708 103
River Sample Amended with 2x 480 400 969 121
500 ng/L of Each Compound 5x 510 1000 1570 106
10x 530 2000 2760 112
lx <2.0 200 209 104
Unamended River Sample 2x <2.0 400 408 102
5x <2.0 1000 1040 104
10x <4.1 2000 2070 104
lx 100 200 294 97
PFECA-G River Sample Amended with 2x 100 400 506 101
100 ng/L of Each Compound 5x 100 1000 1090 99
10x 100 2000 2260 108
lx 440 200 614 87
River Sample Amended with 2x 460 400 817 89
500 ng/L of Each Compound 5x 470 1000 1510 103
10x 490 2000 2580 105
lx 88 200 324 118
Unamended River Sample 2x 86 400 579 123
5x 74 1000 1310 131
10x 78 2000 2620 127
lx 190 200 445 130
PFMOAA River Sample Amended with 2x 200 400 678 120
100 ng/L of Each Compound 5x 190 1000 1420 124
10x 190 2000 2750 128
lx 620 200 820 99
River Sample Amended with 2x 630 400 1140 127
500 ng/L of Each Compound 5x 640 1000 1880 124
10x 650 2000 3120 124
TR0795 Page 5 of 7 July 2020

TABLE 4 Geosyntec Consultants of NC P.C.
MATRIX SPIKE RECOVERIES FOR TABLE 3+COMPOUNDS-LABORATORY MATRIX INTERFERENCE STUDY
Chemours Fayetteville Works,North Carolina
Measured Concentration Measured
Compound Dilution in Parent Sample Matrix Spike Concentration in Matrix Spike
(ng/L) Added(ng/L) Matrix Spike Recovery(%)
Parent Sample Sample(ng/L)
lx 37 200 258 111
Unamended River Sample 2x 36 400 484 112
5x 37 1000 1200 116
10x 36 2000 2420 119
lx 150 200 363 109
PFO2HxA River Sample Amended with 2x 150 400 602 114
100 ng/L of Each Compound 5x 140 1000 1310 117
10x 140 2000 2440 115
lx 550 200 779 117
River Sample Amended with 2x 580 400 1000 107
500 ng/L of Each Compound 5x 560 1000 1710 116
10x 560 2000 2870 116
lx 8.3 200 247 119 •
Unamended River Sample 2x 8.3 400 499 123
5x 7.8 1000 1170 117
10x 7.2 2000 2550 127
lx 120 200 368 124
PFO3OA River Sample Amended with 2x 120 400 567 111
100 ng/L of Each Compound 5x 130 1000 1320 119
10x 130 2000 2710 129
lx 560 200 712 78
River Sample Amended with 2x 570 400 1000 107
500 ng/L of Each Compound 5x 550 1000 1790 124
10x 560 2000 3080 126
lx 3.4 200 236 116
Unamended River Sample 2x 3.1 400 486 121
5x <3.9 1000 1090 109
10x <7.9 2000 2530 127
lx 110 200 338 114
PFO4DA River Sample Amended with 2x 110 400 544 108
100 ng/L of Each Compound 5x 130 1000 1280 l 15
10x 120 2000 2860 137
lx 500 200 723 114
River Sample Amended with 2x 530 400 968 110
500 ng/L of Each Compound 5x 560 1000 1720 115
10x _ 570 2000 2630 103
I R0795 Page 6 of 7 July 2020

TABLE 4 Geosyntec Consultants of NC P.C.
MATRIX SPIKE RECOVERIES FOR TABLE 3+COMPOUNDS-LABORATORY MATRIX INTERFERENCE STUDY
Chemours Fayetteville Works,North Carolina
Measured Concentration Measured
Compound Dilution in Parent Sample Matrix Spike Concentration in Matrix Spike
(ng/L) Added(ng/L) Matrix Spike Recovery(%)
Parent Sample Sample(ng/L)
lx <2.0 200 209 105
Unamended River Sample 2x <2.0 400 371 93
5x <2.0 1000 1150 115
10x <3.4 2000 1910 96
lx 96 200 305 104
PFO5DA River Sample Amended with 2x 100 400 484 96
100 ng/L of Each Compound 5x 110 1000 1180 107
10x 110 2000 2270 108
lx 390 200 592 101
River Sample Amended with 2x 490 400 917 106
500 ng/L of Each Compound 5x 500 1000 1380 89
10x 480 2000 2360 94
lx 47 200 251 102
Unamended River Sample 2x 52 400 476 106
5x 110 1000 1150 104
10x 130 2000 2400 113
lx 140 200 360 108
PMP.A River Sample Amended with 2x 160 400 573 104
100 ng/L of Each Compound 5x 200 1000 1260 106
10x 240 2000 2490 113
lx 530 200 715 95
River Sample Amended with 2x 540 400 979 110
500 ng/L of Each Compound 5x 570 1000 1630 107
10x 610 2000 2800 109
Notes:
< -result is below reporting limit
%-percent •
ng/L-nanograms per liter
TR0795 Page 7 of 7 July 2020

TABLE 5 Geosyntec Consultants of NC P.C.
MEASURED VERSUS EXPECTED CONCENTRATIONS FOR LABORATORY MATRIX INTERFERENCES STUDY SAMPLES
Chemours Fayetteville Works,North Carolina
Concentration (ng/L)
Unamended River Water River Water Amended with River Water Amended with
100 ng/L of Compound 500 ng/L of Compound
Measured Measured Measured
Compound Dilution Expected* Measured / Expected Measured / Expected Measured /
Expected Expected Expected
lx 34 4.3 500 4.6 2,200 4.3
2x 7.9 23 2.9 340 3.2 1,400 2.8
R-PSDA
5x or less <7.9 __ 107.9 210 1.9 507.9910 1.8
10x <16 -- 150 1.4 730 1.4
lx 34 2.5 370 3.2 1,700 3.3
2x 27 1.9 310 2.7 1,300 2.5
Hydrolyzed PSDA 14 114 514
5x 16 1.1 200 1.8 800 1.6
10x 14 1.0 150 1.3 690 1.3
lx 7.7 2.2 310 3.0 1,500 3.0
2x 3.5 4.4 1.3 220 2.1 950 1.9
R-EVE 103.5 503.5
5x or less <3.5 -- 140 1.4 600 1.2
10x <7.0 -- 110 1.1 530 1.1
Notes:
* - expected concentrations in the unamended river water sample were estimated from the result
of the most diluted sample because lesser dilutions are positively biased due to the matrix effect
< - result is below reporting limit
ng/L - nanograms per liter
TR0795 July 2020

100
90
0
0
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Percent of Matrix Spike Recoveries Above 200°/a in
Historical Data Set
Chemours Fayetteville Works,North Carolina
Geosyntec') Geosyntec Consultants°INC,P.C. Figure
NC License No.:C 3500 and C 295
consultants
1
Raleigh July 2020

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Percent of Matrix Spike Recoveries Below 20% in
Historical Data Set
LL Chemours Fayetteville Works, North Carolina
Geosyntec Geosyntec Consultants of NC,P.C. Figure
NC License No.:C 3500 and C 295
consultants
2
Raleigh r July 2020

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for Groundwater
3 No data for this compound in this matrix Chemours Fayetteville Works,North Carolina
E
Geosyntec° Geosyntec Consultants of NC,P.C. Figure
NC License No.:C 3500 and C 295
consultants
3
Raleigh July 2020

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for Surface Water
Chemours Fayetteville Works,North Carolina
E No data for this compound in this matrix
Ft
Ge o syntec° Geosyntec Consultants of NC,P. Figure
NC License No.:C 3500 and C 295
= consultants
4
Raleigh July 2020

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for Drinking Water
No data for this compound in this matrix Chemours Fayetteville Works,North Carolina
Ge o syntec° Geosyntec Consultants of NC,P.C. Figure
NC License No.:C 3500 and C 295
consultants
5
Raleigh July 2020

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Percent of Matrix Spike Recoveries Above 200% in
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Chemours Fayetteville Works,North Carolina
(7
Ge o syntec° Geosyntec Consultants of NC,P.C. Figure
NC License No.:C 3500 and C 295
consultants
6
Raleigh July 2020

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Percent of Matrix Spike Recoveries Above 200% in
Historical Data Set for Soils
No data for this compound in this matrix
Chemours Fayetteville Works,North Carolina
Geosyntec I' Geosyntec Consultants of NC,P.C. Figure
NC License No.:C 3500 and C 295
consultants
7
Raleigh July 2020

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Percent of Matrix Spike Recoveries Above 200% in
Historical Data Set for Sediments
9 No data for this compound in this matrix Chemours Fayetteville Works,North Carolina
Geosyntec'> Geosyntec Consultants of NC,P.C. Figure
NC License No.:C 3500 and C 295
consultants
8
Raleigh July 2020

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Percent of Matrix Spike Recoveries Above 200%in Historical Data Set
for Animal Tissue
No data for this compound in this matrix Chemours Fayetteville Works, North Carolina
Geosyntecl> Geosyntec Consultants of NC,P.C. Figure
NC License No.:C 3500 and C 295
consultants
9
Raleigh July 2020

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Percent of Matrix Spike Recoveries Above 200% in
Historical Data Set for Plant Tissue
No data for this compound in this matrix Chemours Fayetteville Works,North Carolina
Geosyntec Geosyntec Consultants of NC,P.C. Figure
NC License No.:C 3500 and C 295
consultants
10
Raleigh July 2020

100
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i Historical Data Set for Other Solids
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g
Geosy ntec Geosyntec Consultants of NC,P.C. Figure
NC License No.:C 3500 and C 295
consultants
11
Raleigh July 2020

700
600
500
400
a
% Recovery of
Matrix Spike
300
200
a
R
y,
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100 tq
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14
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00 � � 0P` OP ,?.. eRC" CCPc0 �� 00) c? 04, Q�
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E 0
•Undiluted
•2x Dilution Geosyntec° GeosyntecConsultantsofNC,P.C. Figure
< 5x Dilution Expected(ideal)recovery of matrix spikes(100%) NC License No.:C 3500 and 295
consultants
lOx Dilution 12
a River water was collected at River Mile 84 Raleigh July 2020

700
600
500
400
% Recovery of
Matrix Spike
300
v
0 200
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Q� Q� Q5o 100 n /L of Each Compound
tied `�a `�a 9 p
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se/
■Undiluted Geosyntec° Geosyntec Consultants of NC,P.C. Figure
_ 2x Dilution Expected(ideal)recovery of matrix spikes(100%) NC License No.:C 3500 andC 295
Sx Dilution consultants
10x Dilution River water was collected at River Mile 84 Raleigh July 2020 13

700
600
500
400
Recovery of
Matrix Spike
300
200 tt
,
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100 t1
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•Undiluted ��a Geosyntec° Geosyntec Consultants or NC,P.C. Figure
• ■2x Dilution — Expected(ideal)recovery of matrix spikes(100%) NC License No.:C 3500 and C 295
consultants
5x Dilution 14
• 10x Dilution River water was collected at River Mile 84 Raleigh July 2020

140
120
RI
100
Measured
Concentration 80
(ng/L)
Ii
60
40
1
E
F
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szz.‘ ago
•Undiluted
2x Dilution
Geosyntec° Geosyntec Consultants of NC.P.C. Figure
ij NC License No.:C 3500 and C 295
5x Dilution consultants
15
rt 10x Dilution River water was collected at River Mile 84 Raleigh July 2020

600
500
400
•
Measured
Concentration 300
(ng/L)
s
6
200 ,
7 xt
b
b 0
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ti c
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■Undiluted Approximate expected concentration(100 ng/L amendment plus Geosyntec° Geoyntec Consultants otNC,P.C. Figure
■2x Dilution NC License Nu.:C 3500 and C 295
concentration present in unamended sample(Figure 15) Consultants
s 5x Dilution 16
lOx Dilution River water was collected at River Mile 84 Raleigh July 2020

2500
2000
1500
Measured
Concentration
(ng/L)
1000
1 lir =rim IMMIINk.
b f M
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E Chemours Fayetteville Works,North Carolina
3.
•Undiluted Approximate expected concentration(500 ng/L amendment plus
Geosyntec° Geosyntec Consultants of NC,P.0 Figure
NC License No.:C 3500 and C 295
•2x Dilution concentration present in unamended sample(Figure 15) consultants
5x Dilution • 17
10x Dilution River water was collected at River Mile 84 Raleigh July 2020

� 130 Stone Road West
Geosyntec PH 519.822.2230
consultants FAX [phone]
www.geosyntec.com
Memorandum
Date: 24 January 2020
To: The Chemours Company, FC LLC
Copies to: AECOM, Chemours Data Group
From: Geosyntec Consultants Inc.
Subject: Reduction in Frequency of Sample Duplicates and Matrix Spikes for
Analysis of Table 3+PFAS
Samples (water, soil and biota) collected for laboratory analysis of Table 3+ per- and
polyfluorinated alkyl substances (PFAS) compounds are analyzed by laboratory-specific standard
operating procedures (SOPs) that are based on a method developed by Chemours. The two
commercial laboratories that have developed methods from the Chemours method are Test
America (Sacramento, CA) and Eurofins-Lancaster Laboratories (Lancaster, PA). Both
laboratories began to commercially offer Table 3+ in early 2019. At the time of method
development, the method prescribed that each sample be analyzed in duplicate and with a matrix
spike based on a number of reasons (e.g., the method was [and is] not a recognized EPA method,
the analytes were relatively new and not all that well-understood,target reporting limits were[and
are] very low). Other commercial analytical methods methods commonly prescribe one sample
duplicate and one matrix spike per 20 client samples, not one per sample. Geosyntec assessed if
the frequency of one duplicate and one matrix spike for every client sample was providing
information necessary for the use and interpretation of the Table 3+ analytical data.
This assessment reviewed duplicate and matrix spike data to assess if duplicates and matrix spikes
are necessary for every sample. The data set consisted of all Table 3+data collected up to October
17, 2019 and included results from drinking water, groundwater, surface water, soil, sludge,
sediment, animal tissue, plant tissue and any other liquids or solids that were analyzed. The
analysis indicates duplicate analysis and matrix spikes can be reduced from every sample to batch
frequency (i.e., one per up to 20 client samples), as is typically done in standard EPA methods.
The remainder of this memoradum provides the rationale for this conclusion.

Sample Duplicates and Matrix Spikes for Table 3+ PFAS
24 January 2020
Page 2
Duplicates
The data set for duplicates comprised 14,156 data pairs (only data pairs that had at least one
detected result among the primary and duplicate samples were included). The relative percent
difference (RPD) between the results of a given analyte in the primary sample and the results of
the same analyte in the duplicate sample was calculated. For the purposes of this analysis,
Geosyntec considered an RPD value of less than 25% good, and an RPD value of less than 50%
acceptable. The summary of the results were:
• 13,360 data pairs (94.4% of all data pairs)were less than 25%RPD;
• 796 data pairs (5.6% of all data pairs) exceeded 25%RPD; and
• Of the 796 data pairs that exceeded 25% RPD:
o 216 data pairs (1.5% of all data pairs) exceeded 50% RPD.
In any environmental data set, there are typically some exceedances of RPD criteria. Given the
small number of samples (1.5%) in this data set (216 of 14,156 data pairs) that exceeded 50%
RPD,Geosyntec recommends that the analysis of a duplicate for every sample submitted for Table
3+ analysis be discontinued.
Matrix Spikes
The data set for matrix spikes comprised 27,891 data points.The percent recovery of each analyte's
matrix spike was calculated. For the purposes of this analysis, Geosyntec considered 70%-130%
recovery good, and 20-70% or 130-200%recovery acceptable. The summary of the results were:
• 22,183 data points (79.5% of all data points)were inside 70%-130%recovery;
• 5,708 data points (20.5% of all data points)were outside 70%-130%recovery; and
• Of the 5,708 data points that were outside 70%-130%recovery:
o 2,605 data points (9.3% of all data points) were outside 20-70% or 130-200%
recovery.
In any environmental data set, there are typically some exceedances of matrix spike recovery
criteria. Given the small number of samples (9.3%) in this data set (2,605 of 27,891 data points)
that were less than 20% or greater than 200% recovery, Geosyntec recommends that the analysis
of a matrix spike for every sample submitted for Table 3+analysis be discontinued.
Recommendations
Duplicates and matrix spikes for Table 3+analysis of all environmental media should be analyzed
on a batch frequency (i.e., one per up to 20 client samples), as is typically done in standard EPA

Sample Duplicates and Matrix Spikes for Table 3+ PFAS
24 January 2020
Page 3
methods,rather than on a per sample frequency as is currently prescribed. The laboratories' SOPs
should be revised so that duplicates and matrix spikes will be analyzed on a batch frequency(i.e.,
one per up to 20 client samples). Additional duplicates and matrix spikes may be desired by
Chemours; these should be listed as separate samples on the chain-of custody forms.
The analytical laboratories will begin adding an internal standard to each sample prior to the
analysis of each. The standard will likely be an isotopically labeled PFAS analyte(perhaps HFPO-
DA or PFOA). The analysis of this isotopically labeled standard will provide confidence in the
results at a sample level, as opposed to a batch (i.e., one per up to 20 client samples) level.
* * * * *

Attachment F. 12 Matrix Interference During Analysis
of Table 6 Compounds

Geosyntec c>
consultants 2501 Blue Ridge Road,Suite 430
Raleigh,NC 27607
PH 919.870.0576
Geos�ntec Consultants of NC, P.C. FAX osynt00578
www.geosyntec.com
NC License No.:C-3500 and C-295
Memorandum
Date: September 10, 2020
To: The Chemours Company FC,LLC
From: Geosyntec Consultants of NC,PC
Subject: Matrix Interference During PFAS Analysis via the Table 6 Method
Geosyntec Consultants of NC, P.C. (Geosyntec) has prepared this memorandum for The Chemours
Company FC,LLC(Chemours)to describe matrix interference observed during the analysis of certain per-
and polyfluorinated alkyl substances (PFAS) by the analytical method known as the Table 6 Method.
During the analysis of a sample by a given analytical method,the sample matrix refers to all the components
of the sample other than the compounds of interest that are being analyzed by the analytical method. The
sample matrix can be very complex and can have a considerable effect on the quality of the results obtained,
and such effects are called matrix interference. Matrix interference can result in a positive bias (matrix
enhancement)or in a negative bias(matrix suppression)of the analytical results.
The Table 6 Method was developed by Chemours to identify and quantify six PFAS compounds:
• PMPA: perfluoro-2-methoxypropionic acid;
• PEPA: perfluoro-2-ethoxypropionic acid; -
• MTP: 3-methoxy-2,2,3,3-tetrafluoropropanoic acid;
• PPF Acid: perfluoropropionic acid;
• DFSA: difluorosulfoacetic acid; and
• MMF: difluoromalonic acid.
These compounds were either not adequately measured by the Table 3 Method (MTP, PPF Acid, DFSA
and MMF) or required greater sensitivity (i.e., lower reporting limits) in some applications (PMPA and
PEPA)than the Table 3 Method was able to provide. The Table 6 Method incorporates a different sample
preparation method than the Table 3 Method,namely solid-phase extraction(SPE),targeted for compounds
in the concentration range of 2 to 1,000 ng/L. Compounds in the range of 1,000 to 100,000 ng/L can be
analyzed by the Table 6 Method by solvent dilution/direct injection (SDDI); SPE is not necessary for
sample preparation in this concentration range.
engineers 1 scientists 1 innovators

Matrix Interference During PFAS Analysis via the Table 6 Method
10 September 2020
Page 2
The remainder of this memorandum is organized into the following sections:
•
• Scope and Methods—Describing the Table 6 laboratory matrix interference study;
• Results—Describing the results of the study;
• Discussion—Interpreting the results of the study;and
• Recommendations—Guidance for reporting results with matrix interferences and next steps for
resolving matrix interferences
SCOPE AND METHODS
A laboratory matrix interference study of PMPA, PEPA, MTP, PPF Acid, DFSA, and MMF analyzed by
the Table 6 Method using SPE and SDDI methods was commissioned to systematically analyze the
potential for matrix interference. Table 1 provides the full name, common name and CAS number, if
available, for the 6 PFAS compounds that have been analyzed by the Table 6 Method. The study was
commissioned at TestAmerica-Sacramento (TestAmerica), using Cape Fear River water from Bladen
Bluffs(River Mile 84)as the matrix.
For the concentration range where SPE is used for sample preparation (i.e., 2 to 1,000 ng/L), four parent
samples were created: 1) unamended river water, 2) river water amended with 10 ng/L of each of the 6
compounds,3)river water amended with 100 ng/L of each of the 6 compounds,and 4)river water amended
with 1000 ng/L of each of the 6 compounds.Each of the four parent samples was analyzed at five dilutions:
undiluted(lx dilution), 2x dilution, 5x dilution, 10x dilution and 100x dilution(for a total of 20 samples)
and a matrix spike was created for each of the 20 samples to assess the effect of diluting the matrix on the
measured concentrations and matrix spike recoveries(matrix spikes were added after the dilution step).
For the concentration range where SDDI is used for sample preparation(i.e., 1,000 to 100,000 ng/L),three
parent samples were created: 1)river water amended with 2000 ng/L of each of the 6 compounds, 2)river
water amended with 10,000 ng/L of each of the 6 compounds, and 3) river water amended with 100,000
ng/L of each of the 6 compounds.Each of the three parent samples was analyzed at four dilutions:undiluted
(lx dilution), 2x dilution, 5x dilution and 10x dilution (for a total of 12 samples) and a matrix spike was
created for each of the 12 samples to assess the effect of diluting the matrix on the measured concentrations
and matrix spike recoveries(matrix spikes were added after the dilution step).
For the purposes of this work, matrix spike recoveries in the range of 70% to 130% as (per EPA data
validation guidelines), and measured concentration/expected concentration values in the range of 50% to
200%(an arbitrarily selected range representing half to twice the expected concentration)were considered
acceptable.

Matrix Interference During PFAS Analysis via the Table 6 Method
10 September 2020
Page 3
For each of the seven parent samples in the study, and the dilutions of each parent sample,the effect of the
matrix was assessed in two ways:
1) matrix spike recovery—each sample was analyzed, then spiked with a matrix spike and analyzed
again. The concentration in the unspiked sample was subtracted from the concentration in the
spiked sample to calculate how much of the spiked amount was recovered, and divided by the
spiked amount to calculate the percent recovery of the spike(Table 2 and Figures 1 through 6). If
the sample matrix does not affect the analysis, the matrix spike recovery should be between 70%
and 130%throughout the concentrations added via amendment(10, 100, 1,000, 2,000 10,000 and
100,000 ng/L)and throughout the dilution series of each sample.
2) measured concentration divided by expected concentration — the expected concentration of the
unamended sample was estimated from the result of the least diluted sample(which can be expected
to be the most accurate result)with the exception of DFSA,which was estimated from the result of
the most diluted sample because lesser dilutions appear to be positively biased due to matrix effects.
The expected concentration of the amended samples was calculated by adding the concentration of
the unamended sample to the concentration of the amendment. The measured concentration was
divided by the expected concentration(Table 3 and Figures 1 through 6).If the sample matrix does
not affect the analysis,the measured concentration/expected concentration should be between 50%
and 200%throughout the concentrations added via amendment(10, 100, 1,000, 2,000 10,000 and
100,000 ng/L)and throughout the dilution series of each sample.
Note that the measured concentrations account for the dilutions (i.e., if the sample was diluted 2x, the
concentration measured by the analytical instrument was multiplied by 2 to account for the dilution). If the
matrix spike addition was less than 4x the concentration of the original sample or if the measured
concentration was below the reporting limit (which occurs occasionally at the high dilutions used in this
study),the result was not plotted.
RESULTS
Results are discussed below by groups of compounds(PMPA and PEPA, MTP and PPF Acid, and DFSA
and MMF)that showed similar trends in matrix spike recovery and measured concentration versus expected
concentration.
PMPA and PEPA
Concentration Range of 2 to 1,000 ng/L (Sample Preparation by SPE)
Matrix spikes for PMPA and PEPA were all within the acceptable recovery range of 70-130%, with the
exception of PMPA in the undiluted sample for the 100 ng/L amendment,which had a matrix spike recovery
of 137% (Table 2 and Figure 1). This exceedance is not exceptionally large and represents only 1 out of
20 results for PMPA.

Matrix Interference During PFAS Analysis via the Table 6 Method
10 September 2020
Page 4
Measured concentration/expected concentration values for PMPA and PEPA were all within the acceptable
range of 50%to 200%(Table 3 and Figure 1).
The reporting limit for PMPA and PEPA for the Table 6 Method in this concentration range was 2 ng/L,
which is lower than the nominal reporting limits of 10 ng/L for PMPA and 20 ng/L for PEPA with the Table
3 Method.
Concentration Range of 1,000 to 100,000 ng/L (Sample Preparation by SDDI)
Matrix spikes for PMPA and PEPA were all within the acceptable recovery range of 70-130%(Table 2 and
Figure 2).
Measured concentration/expected concentration values for PMPA and PEPA were all within the acceptable
range of 50%to 200%(Table 3 and Figure 2).
MTP and PPF Acid
Concentration Range of 2 to 1,000 ng/L (Sample Preparation by SPE)
Matrix spike recoveries ranged from 20% to 109% (MTP) and 34% to 115% (PPF Acid) (Table 2 and
Figure 3),with some indication of increasing recovery with dilution.This generally low recovery of matrix
spikes suggests the presence of matrix suppression by the sample matrix, meaning the reported
concentrations increase and approach the true concentration as the sample matrix is diluted.
Measured concentration/expected concentration values for MTP and PPF Acid were all within the
acceptable range of 50%to 200%with the following exceptions(Table 2 and Figure 3):
• MTP in the undiluted sample and the 2x dilution for the 10 ng/L amendment(the values were 27%
and 45%, respectively) and MTP in the undiluted sample and the 2x dilution for the 100 ng/L
amendment (the values were 32% and 21%, respectively). This may be a result of matrix
suppression by the sample matrix,as noted above; and
• PPF Acid in the 100x dilution for the unamended sample,the 10 ng/L amendment and the 100 ng/L
amendment (the values were 625%, 296% and 207%, respectively). The observed additional
variability is not unexpected at such a large dilution, because the measured concentrations before
correction for the dilution were quite close to the reporting limit.
Concentration Range of 1,000 to 100,000 ng/L(Sample Preparation by SDDI)
Matrix spike recoveries for MTP and PPF Acid were all within the acceptable recovery range of 70-130%
(Table 2 and Figure 4).

Matrix Interference During PFAS Analysis via the Table 6 Method
10 September 2020
Page 5
Measured concentration/expected concentration values for MTP and PPF Acid were all within the
acceptable range of 50%to 200%(Table 3 and Figure 4).
DFSA and MMF
Concentration Range of 2 to 1,000 ng/L (Sample Preparation by SPE)
Matrix spike recoveries ranged from 21%to 2,098%(DFSA)and 9%to 281%(MMF)(Table 2 and Figure
5),meaning the recoveries were both significantly under and significantly over the acceptable range of 70%
to 130%.Twelve of the 13 results for DFSA were outside the acceptable range,and 17 of the 17 results for
MMF were outside the acceptable range. This indicates significant matrix interference with both a
combination of matrix suppression, likely from the sample matrix and matrix enhancement, likely from the
SPE sample preparation step, with matrix enhancement dominating for DFSA, and matrix suppression
dominating for MMF.
Measured concentrations/expected concentration values for DFSA and MMF ranged from 10%to 1,278%
(DFSA)and 12%to 1,500% (MMF) (Table 2 and Figure 5); the values were both significantly under and
significantly over the acceptable range of 50%to 200%. Fourteen of the 20 results for DFSA were outside
the acceptable range, and 5 of the 14 results for MMF were outside the acceptable range. This indicates
significant matrix interference with both a combination of matrix suppression,likely from the sample matrix
and matrix enhancement, likely from the SPE sample preparation step, with matrix enhancement
dominating for DFSA,and matrix suppression dominating for MMF.
Concentration Range of 1,000 to 100,000 ng/L (Sample Preparation by SDDI)
Matrix spike recoveries ranged from 14%to 83%(DFSA)and 15%to 69%(MMF)(Table 2 and Figure 6)
with increasing recovery with sample matrix dilution. Nine of the 12 results for DFSA were below the
acceptable range,and 12 of the 12 results for MMF were below the acceptable range of 70%to 130%.This
generally low recovery of matrix spikes suggests the presence of matrix suppression by the sample matrix.
Measured concentrations/expected concentration values for DFSA and MMF ranged from 35% to 75%
(DFSA)and 19%to 47% (MMF)(Table 3 and Figure 6). Four of the 10 results for DFSA were below the
acceptable range,and 7 of the 10 results for MMF were below the acceptable range of 50%to 200%. These
generally low measured concentrations/expected concentration values suggest the presence of matrix
suppression by the sample matrix.
DISCUSSION
PMPA and PEPA can be accurately quantified via the Table 6 Method using both the SPE and SDDI sample
preparation methods. For certain purposes, a 2 ng/L reporting limit for PMPA and PEPA is required and
this is achievable with the SPE sample preparation method. (The reporting limits for PMPA and PEPA
with the SDDI sample preparation method are 460 and 250 ng/L,respectively,and with the Table 3 Method

Matrix Interference During PFAS Analysis via the Table 6 Method
10 September 2020
Page 6
are 10 ng/L and 20 ng/L,respectively.) The Table 6 Method,therefore,is an acceptable method for analysis
of PMPA and PEPA for environmental samples.
MTP and PPF Acid can be accurately quantified via the Table 6 Method when the SDDI sample preparation
method (concentration range 1,000 to 100,000 ng/L) is used, but cannot be accurately quantified via the
Table 6 Method when the SPE sample preparation method(concentration range 2 to 1,000 ng/L) is used.
The generally low matrix spike recoveries and measured concentration/expected concentration values
observed with the SPE sample preparation method suggest the presence of matrix suppression by the sample
matrix, meaning the reported concentrations increase and approach the true concentration as the sample
matrix is diluted.
Neither DFSA nor MMF can be accurately quantified via the Table 6 Method using either SPE or the SDDI
sample preparation methods. The SPE sample preparation method resulted in both positive and negative
matrix interference and the SDDI sample preparation method resulted in negative matrix interference.
The exact mechanisms of matrix interference are not well understood. However, under both the Table 6
Method and the Table 3 Method chromatographic conditions, DFSA, MMF, MTP, and PPF Acid elute
early (i.e., they do not interact very much with the chromatographic column and elute quickly along with
other components of the sample matrix)which may be causing interference with other short chain PFAS,
natural organic matter or other components of the sample matrix.
RECOMMENDATIONS
The matrix study results provide evidence that the Table 6 Method can reliably quantify PMPA and PEPA
down to reporting limits of 2 ng/L, which are the required reporting limits for sampling of private wells
under Consent Order paragraph 21 (reporting limits with the Table 3 Method are 10 ng/L for PMPA and
20 ng/L for PEPA). The use of the Table 6 Method is therefore recommended for PMPA and PEPA analysis
for private well sampling.
The matrix study results also indicated that the Table 6 Method cannot reliably quantify DFSA and MMF,
and to a lesser degree, MTP and PPF Acid. Removal of these four analytes from the Table 6 Method is
recommended.
Based on the data quality issues presented in this memorandum for MMF, DFSA, MTP and PPF Acid,
analysis and reporting of these compounds is not recommended. Chemours is undertaking a methods
improvement program to enable more accurate quantitation of these four compounds. Specifically
Chemours is assessing the causative sources of these matrix interference issues, assessing using enhanced
internal reference standards to calibrate the concentrations of these compounds,and assessing the ability to
enhance the analytical methodologies used including evaluating alternative liquid chromatography
stationary phases and optimization of mass spectrometric ionization techniques.Chemours will provide the
North Carolina Department of Environmental Quality(NC DEQ)with updates every six months.
****

Matrix Interference During PFAS Analysis via the Table 6 Method
10 September 2020
Page 7
Attachments
Table 1: Names and CAS Numbers for Compounds in the Matrix Interference Study
Table 2: Matrix Spike Recoveries
Table 3: Measured Versus Expected Concentrations
Figure 1: Matrix Spike Recoveries and Measured Concentrations in River Water in the Range of 2 to
1,000 ng/L for PMPA and PEPA
Figure 2: Matrix Spike Recoveries and Measured Concentrations in River Water in the Range of 1,000
to 100,000 ng/L for PMPA and PEPA
Figure 3: Matrix Spike Recoveries and Measured Concentrations in River Water in the Range of 2 to
1,000 ng/L for MTP and PPF Acid
Figure 4: Matrix Spike Recoveries and Measured Concentrations in River Water in the Range of 1,000
to 100,000 ng/L for MTP and PPF Acid
Figure 5: Matrix Spike Recoveries and Measured Concentrations in River Water in the Range of 2 to
1,000 ng/L for DFSA and MMF
Figure 6: Matrix Spike Recoveries and Measured Concentrations in River Water in the Range of 1,000
to 100,000 ng/L for DFSA and MMF

Geosyntec Consultants of NC P.C.
TABLE 1
NAMES AND CAS NUMBERS FOR COMPOUNDS IN
THE MATRIX INTERFERENCE STUDY
Chemours Fayetteville Works,North Carolina
Common Name Chemical Name CASN
PMPA Perfluoro-2-methoxypropionic acid 13140-29-9
PEPA Perfluoro-2-ethoxypropionic acid 267239-61-2
MTP 3-Methoxy-2,2,3,3-tetrafluoropropanoic acid 93449-21-9
PPF Acid Perfluoropropionic acid 422-64-0
DFSA Difluorosulfoacetic acid 422-67-3
MMF Difluoromalonic acid 1514-85-8
Notes:
CASN - Chemical Abstracts Service Number
TR0795 September 2020

Geosyntec Consultants of NC P.C.
TABLE 2
MATRIX SPIKE RECOVERIES
Chemours Fayetteville Works,North Carolina
Measured Measured
Sample Matrix Spike Matrix Spike
Concentration in Concentration in
('ompound Preparation Parent Sample Dilution Added Recovery
Method Parent Sample (ng/L) Matrix Spike (%)
(ng/L) Sample(ng/L)
lx 35 40 76.7 104
Unamended River 2x 29 80 120 113
Water 5x 26 200 234 104
10x 30 400 445 104
100x <92 _ 4,000 4,080 102
lx 45 40 93.4 122
River Water Amended 2x 45 80 131 108
with 10 ng/L of Each 5x 53 200 250 98
Compound 10x 56 400 434 94
SPE 100x <92 4,000 4,130 103
lx 120 40 177 137
River Water Amended 2x 140 80 212 96
with 100 ng/L of Each 5x 110 200 322 104
Compound 10x 110 400 493 95 _
100x 130 4,000 3,830 93
Ptili'A lx 870 40 992 --
River Water Amended 2x 1,000 80 1,000 --
with 1,000 ng/L of 5x 890 200 1,110 -
Each Compound 10x 880 400 1,200 78
100x 840 4,000 4,470 91
River Water Amended lx 2,000 20,000 24,600 113
with 2,000 ng/L of 2x 1,700 40,000 47,500 114
Each Compound 5x <2300 100,000 117,000 117
10x <4600 200,000 203,000 102
River Water Amended lx 10,000 20,000 31,500 107
SDDI with 10,000 ng/L of 2x 9,400 40,000 51,700 106
Each Compound 5x 9,400 100,000 116,000 107
10x 11,000 200,000 229,000 109
River Water Amended lx 110,000 20,000 124,000 -
2x 110,000 40,000 143,000 85
with 100,000 ng/L of
Each Compound 5x 120,000 100,000 237,000 121 _
10x 100,000 200,000 341,000 118
TR0795 Page 1 of 6 September 2020

Geosyntec Consultants of NC P.C.
TABLE 2
MATRIX SPIKE RECOVERIES
Chemours Fayetteville Works,North Carolina
Sample Measured Matrix Spike Measured Matrix Spike
Concentration in Concentration in
Compound Preparation Parent Sample Dilution Added Recovery
Method Parent Sample (ng/L)
Spike (%)
(ng/L) Sample(ng/L)
lx 3.3 40 33.7 76
Unamended River 2x 2.9 80 79.0 95
Water 5x 4.2 200 198 97
10x <5.0 400 355 89 _
100x <50 4,000 3,690 92 _
lx 16 40 67.8 130
River Water Amended 2x 15 80 104 111
with 10 ng/L of Each 5x 13 200 238 112
Compound 10x 12 400 405 98
SPE 100x <50 4,000 4,040 101
lx 140 40 174 74
River Water Amended 2x 130 80 217 111
with 100 ng/L of Each 5x 100 200 326 111
Compound 10x 91 400 553 115
100x 78 4,000 4,030 99
PEPA lx 1,000 40 1,110 --
River Water Amended 2x 1,100 80 1,180 --
with 1,000 ng/L of 5x 930 200 1,120 --
Each Compound 10x 920 400 1,270 88
100x 690 4,000 4,120 86
River Water Amended lx 2,000 20,000 21,700 98
with 2,000 ng/L of 2x 1,800 40,000 50,200 121
Each Compound 5x 2,000 100,000 107,000 105
10x <2500 200,000 220,000 110
River Water Amended lx 9,400 20,000 28,200 94
SDDI with 10,000 ng/L of 2x 8,900 40,000 50,800 105
Each Compound 5x 9,800 100,000 112,000 102
10x 11,000 200,000 217,000 103
River Water Amended lx 110,000 20,000 117,000 -
2x 98,000 40,000 141,000 110
with 100,000 ng/L of
Each Compound 5x 110,000 100,000 219,000 106 -
10x 100,000 200,000 291,000 93
TR0795 Page 2 of 6 September 2020

Geosyntec Consultants of NC P.C.
TABLE 2
MATRIX SPIKE RECOVERIES
Chemours Fayetteville Works,North Carolina
Sample Measured Matrix Spike Measured Matrix Spike
Concentration in Concentration in
('ompuund Preparation Parent Sample Dilution Added Recovery
1lethod Parent Sample (ng/L) Matrix Spike
(ng/L) Sample(ng/L) (%)
lx <2.0 40 15.0 38
Unamended River 2x <2.0 80 18.7 23
5x <3.4 200 40.5 20
Water 10x <6.7 400 117 29
100x <67 4,000 2,660 66
lx 2.7 40 27.2 61
River Water Amended 2x 4.5 80 51.3 58
with 10 ng/L of Each 5x 5.1 200 107 51
Compound 10x 11 400 321 78
100x <67 4,000 3,790 95
SPL lx 32 40 41.0 23
River Water Amended 2x 21 80 42.1 26
with 100 ng/L of Each 5x 68 200 211 72
Compound 10x 70 400 391 80
100x 100 4,000 4,460 109 _
lx 700 40 615 --
hi I' River Water Amended 2x 570 80 564 --
with 1,000 ng/L of 5x 550 200 662 55
Each Compound 10x 730 400 889 40 _
100x 760 4,000 3,730 74
River Water Amended lx 1,700 20,000 23,100 107
with 2,000 ng/L of 2x 1,700 40,000 44,000 106
Each Compound 5x 2,100 100,000 107,000 105
10x <3400 200,000 201,000 100
River Water Amended lx 9,500 20,000 28,600 96
SDDI with 10,000 ng/L of 2x 8,500 40,000 47,900 99
Each Compound 5x 9,400 100,000 109,000 100
10x 9,300 200,000 212,000 101
River Water Amended lx 100,000 20,000 110,000 --
with 100,000 ng/L of 2x 97,000 40,000 136,000 98
Each Compound 5x 99,000 100,000 195,000 96
10x 92,000 200,000 293,000 101
TR0795 Page 3 of 6 September 2020

Geosyntec Consultants of NC P.C.
TABLE 2
MATRIX SPIKE RECOVERIES
Chemours Fayetteville Works,North Carolina
Measured Measured Matrix Spike
Sample Matrix Spike p
Concentration in Concentration in
Compound Preparation Parent Sample Dilution Added Recovery
Method Parent Sample (n ) Matrix Spike
0
(ng/L) Sample(ng/L) (�O)
1x 16 40 55.4 98
Unamended River 2x 20 80 53.4 42
Water 5x 21 200 88.3 34
10x 26 400 178 38
100x 100 4,000 3,010 73 _
lx 48 40 87.0 97
River Water Amended 2x 44 80 123 99
with 10 ng/L of Each 5x 40 200 167 63
Compound 10x 46 400 357 78
SPE 100x 70 4,000 3,270 80
lx 79 40 92.8 34
River Water Amended 2x 55 80 93.4 48
with 100 ng/L of Each 5x 140 200 322 93
Compound 10x 140 400 512 92
100x 240 4,000 4,840 115
PPF Acid lx 1,100 40 1,070 --
River Water Amended 2x 1,000 80 984 --
with 1,000 ng/L of 5x 790 200 939 75
Each Compound 10x 910 400 1,120 54
100x 890 4,000 4,120 81
River Water Amended lx 2,000 20,000 24,100 111
with 2,000 ng/L of 2x 1,800 40,000 44,200 106
Each Compound 5x 2,200 100,000 110,000 108
10x <3500 200,000 207,000 104
River Water Amended lx 9,800 20,000 29,800 100
SDDI with 10,000 ng/L of 2x 8,900 40,000 48,700 100
Each Compound 5x 9,800 100,000 111,000 101
10x 10,000 200,000 216,000 103
River Water Amended lx 110,000 20,000 119,000 --
with 100,000 ng/L of 2x 100,000 40,000 149,000 113
Each Compound 5x 110,000 100,000 208,000 102
10x 99,000 200,000 318,000 110
TR0795 Page 4 of 6 September 2020

Geosyntec Consultants of NC P.C.
TABLE 2
MATRIX SPIKE RECOVERIES
Chemours Fayetteville Works,North Carolina
Sample Measured MeasuredSpike Measured Matrix Spike
Concentration in Concentration in
Compound Preparation Parent Sample Dilution Added Recovery
Method Parent Sample (ng/L) Matrix Spike (%)
(ng/L) Sample(ng/L)
lx 33 40 253 551
Unamended River 2x 54 80 359 381
Water 5x 84 200 954 435
10x 120 400 3,080 739
100x 330 4,000 56,100 1394
lx 240 40 727 --
River Water Amended 2x 410 80 2,010 --
with 10 ng/L of Each 5x 480 200 4,460 1993 _
Compound 10x 480 400 8,880 2098
SPE 100x 490 4,000 66,500 1650
lx 140 40 147 21
River Water Amended 2x 89 80 148 74
with 100 ng/L of Each 5x 1,100 200 3,090 --
Compound 10x 1,000 400 4,780 933
100x 1,000 4,000 35,800 869
DFSA lx 15,000 40 13,700 --
River Water Amended 2x 17,000 80 16,700 -
with 1,000 ng/L of 5x 15,000 200 19,100 -
Each Compound 10x 15,000 400 20,200 --
100x 14,000 4,000 68,100 1365
River Water Amended lx <800 20,000 8,630 43
with 2,000 ng/L of 2x <1600 40,000 21,400 54
5x <4000 100,000 68,600 69
Each Compound
10x <8000 200,000 149,000 74 _
lx 3,600 20,000 11,700 40
River Water Amended 2x 4,100 40,000 22,200 45
SDDI with 10,000 ng/L of
Each Compound 5x 6,200 100,000 70,600 64
10x <8000 200,000 166,000 83
River Water Amended lx 41,000 20,000 43,600 14
with 100,000 ng/L of 2x 45,000 40,000 65,400 50
Each Compound 5x 62,000 100,000 128,000 65
10x 75,000 200,000 239,000 82
TR0795 Page 5 of 6 September 2020

Geosyntec Consultants of NC P.C.
TABLE 2
MATRIX SPIKE RECOVERIES
Chemours Fayetteville Works,North Carolina
Sample Measured Matrix Spike Measured Matrix Spike
Concentration in Concentration in
Compound Preparation Parent Sample Dilution Added Recovery
Method Parent Sample OWL)
Matrix Spike
(ng/L) Sample(ng/L) (%)
lx <4.0 40 15.3 30 _
Unamended River 2x <4.0 80 21.8 27
Water 5x <9.5 200 69.4 35
l0x <19 400 254 64
100x <190 4,000 9,210 230
lx 9.5 40 28.5 48
River Water Amended 2x 16 80 148 165
with 10 ng/L of Each 5x 31 200 394 182
Compound 10x 35 400 900 216
SPE 100x <190 4,000 11,200 281
lx 15 40 19.0 9
River Water Amended 2x 12 80 20.9 12
with 100 ng/L of Each 5x 130 200 467 167
Compound 10x 130 400 854 180
100x 1,500 4,000 11,200 240
MMF lx 770 40 587 --
River Water Amended 2x 950 80 919 --
with 1,000 ng/L of 5x 1,100 200 1,470 -
Each Compound 10x 1,200 400 1,780 144
100x _ 1,900 4,000 10,700 222
River Water Amended lx <950 20,000 6,130 31
with 2,000 ng/L of 2x <1900 40,000 17,600 44
Each Compound 5x <4800 100,000 54,900 55
10x <9500 200,000 122,000 61
River Water Amended lx 1,900 20,000 7,770 29
SDDI with 10,000 ng/L of 2x 2,700 40,000 18,200 39
5x <4800 100,000 58,300 58
Each Compound -
10x <9500 200,000 134,000 67
River Water Amended lx 22,000 20,000 25,200 15
with 100,000 ng/L of 2x 29,000 40,000 45,200 42
Each Compound 5x 42,000 100,000 95,900 54
10x 47,000 200,000 186,000 69
Notes:
< -result is below reporting limit
- -matrix spike addition was less than 4x the concentration of the sample;matrix spike recovery was not calculated
% -percent
ng/L -nanograms per liter
DFSA -difluorosulfoacetic acid
MMF -difluoromalonic acid
MTP -3-methoxy-2,2,3,3-tetrafluoropropanoic acid
PEPA -perfluoro-2-ethoxypropionic acid
PMPA -perfluoro-2-methoxypropionic acid
PPF Acid-perfluoropropionic acid
SDDI -solvent dilution/direct injection
SPE -solid phase extraction
TR0795 Page 6 of 6 September 2020

Gcosyntcc Consultants of NC P.C.
TABLE 3
MEASURED VERSUS EXPECTED CONCENTRATIONS
Chemours Fayetteville Works,North Carolina
II
Concentration Range of 2 to I,OW ng/L(sample preparation by SPE) Concentration Range of 1.000 to 100,000 nail,(sample preparation by SDDI)
UeameOdad River Water River Water Amended with River Water Amended with River Water Amended with 1,000ng/L of River Water Amended with River Water Amended with River Water Amended with
t0 eg/L of Each Compound 100 ng/L of Each Compound Each Compound 2,000 ng/L of Each Compound 10,000 ng/L of Compound 100,000 ng/L of Compound
Expected Measured Measured/ Expected Measured Measured/ Expected Measured Measured/ Expected Measured Measured/ Expected Measured Measured/ Expected Measured Measured/ Expected Measured Measured/
Compound Dilution Concentration' Concentration Expected Concentration Concentration Expected Concentration Concentration Expected Concentration Concentration Expected Concentration Concentration Expected Concentration Concentration Expected Concentration Concentration Expected
(ng/L) )ng/L) (%) (ng/L) (ng/L) (%) (ng/L) (ng/L) (%) (ng/L) (ng/L) (•/.) (ng/L) (ag/L) (•/.) (ng/L) (og/L) ('/.) (ng/L) (nc/L) (%)
-
lx 35 100%4, 45 100% 120 89% 870 84% 2,000 98% 10.000 100% 110000 r I10a/e !!
2x 29 83% 45 100%. 140 104% 1,000 97% 1,700 0.4 9,400 94% 110,000 110%
PMPA Sx 35 26 74% 45 53 118%. 135 110 81% 1035 890 86% 2,035 <2300 _ - 10,035 9,400 94% 100.035 120,000 120'/a
IOx 30 860/, 56 124% 110 SI% 880 85% <4600 - 11,000 110% 1011000 100%
100w <92 - <92 - 130 96% 840 81%. no - na - to -
Ix 3.3 1011% 16 120% 140 136% 1,000 100% 2,000 100% 9,400 94% 11(1,000 11%
2z 29 88% IS 113% 130 126% 1,100 110% 1,800 90% 8,900 89% 98,000 10%
PEPA 5x 3.3 4.2 127% 13.3 13 98% 103.3 100 97% 1,000.3 930 93% 2003.3 2,000 100% 10,003.3 9,800 50% 1000.003.3 1101100 11%
IOx <50 - 12 90/4, 91 88%. 920 92% <2500 - 11000 110% 1110000 10%
100x <50 - <50 - 78 76% 690 69% na - na - na -
Ix <2 - 2.7 27% 32 32% 700 7)0/ 1,700 85% 9,500 95% 10I1,000 100%
2x <2 - 4.5 45% 21 21% 570 57% 1,700 85% 8,500 85% 97,000 97%
MTP 5x <2 <3.4 - 10 5.1 51% I00 68 68% 1,000 550 55% 2,000 2,100 105% 10,000 9,400 94% 100,000 99)100 99%
10x <6.7 - II 110% 70 70% 730 73% <3400 - 9,300 93% 92,000 92%
100x <67 - <67 - 100 100% 760 76% na - na - no -
Ix 16 100%. 48 185% 79 68% 1,100 108% 2,000 99% 9,800 98% 110,000 110/a
2x 20 125% 44 _ 169% _ 55 47% 1.000 980'. 1.800 89% 8,900 09% 100,000 100'/e
PPF Acid 5x 16 21 131% 26 40 154% 116 140 121'/. 1.016 790 78% 2.016 2,200 109%. 10,016 9,800 98% 100,016 110,000 110%
IOx 26 163% 46 177% 140 121% 910 90/. <3500 - 10,000 100% 99,000 99%.
100x 100 625% 70 269% 240 207% 890 88% na - na - na -
Ix 33 10% 2411 71% 140 33% 15,000 _ 1128% <BOO <34% 3,600 35% 41.000 11%
2x 54 16% 411) 121% 89 21% 17,000 _ 1278% <1600 <69% 4,100 40% 45,000 45.4
DFSA 5x -330 84 25% -340 480 141% -430 1.100 256% -1,330 15.000 1128% -2,330 <4000 - -10,330 6,200 60% -I00.330 621)00 62%
10x 120 36% 480 141% 1000 233% 15,000 1128% <8000 - <8000 <77% 75000 75%
100x 330 100% 490 144% 1.000 233% 14,000 1053% na - na - to -
lx <4 - 9.5 95% 15 15% 770 58%. <950 _ <48% 1,900 19%. 22,000 22%_
2x <4 - 16 1600'. 12 12% 950 71% <19081 <95% 2,700 27% 29.000 29%
MMF Sx <4 <9.5 - 10 31 310% 100 130 130% 1,000 1,100 83% 2,000 <4800 - 10,000 <4800 <48% 100,000 42,000 42%
IOx <19 - 35 350% 130 130/o 1,200 90% <9500 - <9500 <95% 47,(88) 47%
100x <190 - <190 - 1,500 1500% 1900 143% to - na - to -
Notes.'
•-expected concentrations in the momended river water sample were estimated from the result of the least diluted sample.with the exception of DFSA.for which the expected concentration in the utotnetded
river water sample was estimated from the result of the most diluted sample because lesser dilutions appear to be positively biased due to matrix effects
<-result is less than the associated s'alue
--approximately
--not calculable
DFSA-difluorosulfoacelic acid PEPA-perfluoro-2-ethoxvpropionic acid
MMF-difluomwalottic acid PMPA-pernuoro-2-nnthoxypropionic acid
MTP-3-melhoxy-2.2.3.3-Ietrofuoropropannic acid PPF Acid-pee luuropropimdc acid
na-not analyzed SDDI-solvent dilution/direct injection
ng/L-ttattogmnts per liter SPE-solid phase extraction
TR0795 September 2020

Unamended River Water
Matrix Spike Recovery Measured Concentration/Expected Concentration
140% 140%
120% `0 120%
o
GI
'—` 100% - 100%
•Undiluted '; III Undiluted
;; 80% t ■2x Dilution 3 80% ,,,,- ■2x Dilution
c 5x Dilution v ° 5x Dilution
60% a 60/
10x Dilution
X
c � lOx Dilution
40%
■100x Dilution 3 40% . •■100x Dilution
20% it' 20%
PMPA PEPA PMPA PEPA
River Water Amended with 10 ng/L of Each Compound
Matrix Spike Recovery Measured Concentration/Expected Concentration
140% 140%
120% co_ 120%
o
a. 100% ■Undiluted a 100%o ■Undiluted
` a o
80% '• ■2x Dilution d 80% IN 2x Dilution
60% 5x Dilution a 60°/ 5x Dilution
L.
. 10x Dilution a 10x Dilution
3 40% E 40%
a°7c ■100x Dilution x ■100x Dilution
o
20% l 20% i 1
, .
...
!,.,..*.
PMPA PEPA PMPA PEPA
River Water Amended with 100 ng/L of Each Compound
Matrix Spike Recovery Measured Concentration/Expected Concentration
I 140% 140%
c
120% 0 120%
A
a 100% ■Undiluted d 100% ■Undiluted
A 80% ®2x Dilution 80% in 2x Dilution
5x Dilution a ° 5x Dilution
60% . a 60%
> 10x Dilution lOx Dilution
8 40% d 40% ,
■100x Dilution N •100x Dilution
m
20% . _ 20%
0% 0%
,
PMPA PEPA PMPA PEPA
River Water Amended with 1,000 ng/L of Each Compound
Matrix Spike Recovery Measured Concentration/Expected Concentration
140% 140%
120% g 120%
R d re
`
a 100% y 100%
1 •Undiluted •■Undiluted
'_' o
t f 80% ■2x Dilution 80%o
■2x Dilution
0 60% I 5x Dilution o n 60% 5x Dilution
- I. X
2 lOx Dilution 10x Dilution
-13
40% d 40%
ix le100x Dilution •100x Dilution
of0
°s 20% i' 20%
0% 0%
1 PMPA PEPA PMPA I PEPA
Notes:
Sample preparation in the range of 2 to 1,000 ng/L is by solid phase extraction
ng/L-nanograms per liter
PEPA-perfluoro-2-ethoxypropionic acid Matrix Spike Recoveries and Measured Concentrations in River Water
PMPA-perfluoro-2-methoxypropionic acid in the Range of 2 to 1,000 ng/L for PMPA and PEPA
Chemours Fayettevile Works,North Carolina
Ideal recovery of matrix spikes and
ideal measured concentration/expected concentration
If the matrix spike addition was less than 4x the concentration of the sample or the Geosyntec° Geosyntec Consultants of NC,P.C. Figure
NC License No.:C 3500 and C 295
measured concentration was below the reporting limit, the result was not plotted. consultants
1
River Water is from the Cape Fear River(collected June 26, 2020 at River Mile 84) Raleigh September 2020

River Water Amended with 2,000 ng/L of Each Compound
Matrix Spike Recovery Measured Concentration/Expected Concentration
140% 140%
120% 0 120%
2
o • a 100%
0 100%
XI IIUndiluted o •Undiluted
80%
80/ IIIEE:n
Dil I 46 o 60/ 5x Dilution
a
o a
• 40% ■ 40% Fill 10x Dilution
1 20%
i• 20%
0%
0%
PMPA PEPA PMPA PEPA
River Water Amended with 10,000 nglL of Each Compound
Matrix Spike Recovery Measured Concentration/Expected Concentration
140% 140%
a, 120% a 120%
Y
2
.K 100% _ (V 100%
V
■Undiluted `o •■Undiluted
80% v 80%
> 2x Dilution 2x Dilution
O 60% 5x Dilution x 60%
5x Dilution
a,
°C 40/ lOx Dilution 40/ lOx Dilution
�
220% C L 20% f
,
PMPA PEPA PMPA PEPA
River Water Amended with 100,000 ng/L of Each Compound
Matrix Spike Recovery Measured Concentration/Expected Concentration
140% 1
1EE
a, 100%
■Undiluted `o ■Undiluted
80% u 80%
2x Dilution 2x Dilution
0 60% 5x Dilution W 60/ 5x Dilution
--, :
°C• 40% 10x Dilution v 40% 10x Dilution
N
20% • 20% 86-. '. 1
0% I
O%
ai
b PMPA PEPA PMPA PEPA
ii
s
i
a
F
1 $R
E
E
b
o'
a°
6
Notes:
a Sample preparation in the range of 1,000 to 100,000 ng/L is by solvent dilution/direct injection
Y, ng/L - nanograms per liter
PEPA - perfluoro-2-ethoxypropionic acid Matrix Spike Recoveries and Measured Concentrations in River Water
PMPA - perfluoro-2-methoxypropionic acid in the Range of 1,000 to 100,000 ng/L for PMPA and PEPA
1 Chemours Fayettevile Works.North Carolina
Ideal recovery of matrix spikes and
ideal measured concentration/expected concentration
5. If the matrix spike addition was less than 4x the concentration of the sample or the Geosyntec'� Geosyntec Consultants of NC,P.C. Figure
NC License No.:C 3500 and C 295
measured concentration was below the reporting limit, the result was not plotted. consultants
2
River Water is from the Cape Fear River (collected June 26, 2020 at River Mile 84) Raleigh September 2020

I
Unamended River Water
Matrix Spike Recovery Measured Concentration/Expected Concentration
120% 700%
100% 2 600%
a 2
a ■Undiluted 500% •Undiluted
a 80%
o
2x Dilution v 400% x 2x Dilution
60% 01
0 5x Dilution it 300% 5x Dilution
X
40% 10x Dilution v lOx Dilution
o 2 200%
100x Dilution ■100x Dilution
20% g 100%
0% 0%
MTP PPF Acid MTP PPF Acid
River Water Amended with 10 nq/L of Each Compound
Matrix Spike Recovery Measured Concentration/Expected Concentration
120% 300%
100% ° 250%
d
Y c
a 80% •Undiluted c 200% ■Undiluted
x 0
fttc
;; 2x Dilution 2x Dilution
i' 60% d 150% Oa
o 5x Dilution a 5x Dilution
CS. X lOx Dilution
c 400� 10x Dilution ;a, 100%
u iv
di
■100x Dilution 0• 10100x Dilution
20% 2 50%
0% 0%
MTP PPF Acid MTP PPF Acid
River Water Amended with 100 nq/L of Each Compound
Matrix Spike Recovery Measured Concentration/Expected Concentration
120% 250%
c
100% 2
w
;, 200%
Y c
{a 80°� ■Undiluted °; ■E'E
i 2x Dilution 150% i
60% a
o 5x Dilution a
x 100%
40% ; 10x Dilution -- 10x Dilution
$ d
■100x Dilution 3 ■100x Dilution
rl 50%
20% „
§
0% 0%
3 MTP PPF Acid MTP PPF Acid
E
River Water Amended with 1,000 nglL of Each Compound
Matrix Spike Recovery Measured Concentration/Expected Concentration
120% 120%
15
100% .2 100%
a •Undiluted a
a 80% ii 80% III Undiluted
` c
° 2x Dilution uo
■2x Dilution
E iu 60% 5x Dilution �; 60%0 0 xx 5x Dilution
::::::
0 40% 10x Dilution v 40% 10x Dilution
o i CC ■100x Dilution N ■100x Dilution
° 20% 2 20%
E
0% 0%
MTP PPF Acid MTP PPF Acid
Notes:
Sample preparation in the range of 2 to 1,000 ng/L is by solid phase extraction
ng/L -nanograms per liter
MTP -3-methoxy-2,2,3,3-tetrafluoropropanoic acid Matrix Spike Recoveries and Measured Concentrations in River Water
3 PPF Acid - perfluoropropionic acid in the Range of 2 to 1,000 nglL for MTP and PPF Acid
Chemours Fayettevile Works,North Carolina
Ideal recovery of matrix spikes and
ideal measured concentration/expected concentration
If the matrix spike addition was less than 4x the concentration of the sample or the Geosyntec'� Geosyntec Consultants of NC,PC. Figure
NC License No.:C 3500 and C 295
measured concentration was below the reporting limit, the result was not plotted. consultants
3
River Water is from the Cape Fear River(collected June 26, 2020 at River Mile 84) Raleigh September 2020

River Water Amended with 2,000 nq/L of Each Compound
Matrix Spike Recovery Measured Concentration/Expected Concentration
120% 120%
I
100% 'ec 100%
v
80%
Y II
Undiluted o 80% ■Undiluted
u
60% 2x Dilution v 60% 2x Dilution
`o v
, 5x Dilution W 5x Dilution
a 40% -- 40%
10x Dilution v 10x Dilution
ci, g
cc
20% v 20%
i I
0% 0%
MTP PPF Acid MTP PPF Acid
River Water Amended with 10,000 nglL of Each Compound
Matrix Spike Recovery Measured Concentration/Expected Concentration
120% 120%
c
100% 1 ri -61. r- ` 100%
,.a w
u 80/ ■Undiluted
x 80°� ■Undiluted •o ro
u
60% 2x Dilution v 60°� 2x Dilution
`o :ci
5x Dilution 5x Dilution
0 40% 40/
a, 10x Dilution v 10x Dilution
z
20% 2 20%
i
II II
0% 0%
MTP PPF Acid MTP PPF Acid
River Water Amended with 100,000 nq/L of Each Compound
Matrix Spike Recovery Measured Concentration/Expected Concentration
120% 120%
c
100% 100%
Y 80/
x 80% C■Undiluted o` •
u Undiluted
i 60% 2x Dilution v 60% 2x Dilution
• o v
Y. 5x Dilution w 5x Dilution
-
iiii
40% 40%
Dilution 10x Dilution
3 20% 2 20%
2
0% - 40Y 0%
MTP PPF Acid MTP PPF Acid
8
v'
's
b
i
R
5
1
a
E
F
3 t)
1
0
o°
ti
Notes:
o
Sample preparation in the range of 1,000 to 100,000 ng/L is by solvent dilution/direct injection
!, ng/L - nanograms per liter
2 MTP - 3-methoxy-2,2,3,3-tetrafluoropropanoic acid Matrix Spike Recoveries and Measured Concentrations in River Water
PPF Acid - perfluoropropionic acid in the Range of 1,000 to 100,000 ng/L for MTP and PPF Acid
iiChemours Fayettevile Works,North Carolina
Ideal recovery of matrix spikes and
ideal measured concentration/expected concentration
If the matrix spike addition was less than 4x the concentration of the sample or the Geosyntec� GcosyntecConsultantsofNC,P.C. Figure
& NC License No.:C 3500 and C 295
measured concentration was below the reporting limit, the result was not plotted. consultants
4
River Water is from the Cape Fear River (collected June 26, 2020 at River Mile 84) Raleigh September 2020

Unamended River Water
Matrix Spike Recovery Measured Concentration/Expected Concentration
1600% 120%
1400% ° 100%
m
m °
1200/ ■Undiluted 80% ■Undiluted
• 1000% •2x Dilution u ■2x Dilution
'' 800% v 60%
O 5x Dilution o 5x Dilution
c 600% lOx Dilution °
40� lOx Dilution
400% ■100x Dilution II100x Dilution
��� d 20%
200% meets. I 0% II 1
DFSA MMF DFSA MMF
River Water Amended with 10 ng/L of Each Compound
Matrix Spike Recovery Measured Concentration/Expected Concentration
2500% 400%
c 350%
2000% 03
;� c 300%
a ■Undiluted o ■Undiluted
1. ° 0 250%
1500/ ■2x Dilution a •2x Dilution
200%
O 5x Dilution a 5x Dilution
1000% it °°
c 10x Dilution v 150/ 10x Dilution
re •100x Dilution o N 100%
500% 03
i ■100x Dilution
. •
50% II
0% 0%
DFSA MMF DFSA MMF
River Water Amended with 100 ng/L of Each Compound
Matrix Spike Recovery Measured Concentration/Expected Concentration
1000% 1600%
900% c 1400%
800% m
CD
Y 1200%
a 700% ■Undiluted ° •Undiluted
° co 1000%
600/ ■ •2x Dilution v ®2x Dilution
500% « 800%
c 5x Dilution w 5x Dilution
i' 400% W• 600%
ai
10x Dilution 10x Dilution
• 300% ■100x Dilution N 400% a 100x Dilution
200% d
100% 200% ,
0% —® --
0
3 DFSA MMF DFSA MMF
E
River Water Amended with 1,000 ng/L of Each Compound
Matrix Spike Recovery Measured Concentration/Expected Concentration
1600% 1400%
I 2
1400% co_ 1200% .;
1200% ■Undiluted • 1000% II Undiluted
c
1000% ■2x Dilution 800% ■2x Dilution
800% x 5x Dilution
>
c 5x Dilution . 600%
°600/ 10x Dilution 10x Dilution
3 d 400%
• 400% ■100x Dilution ' ■100x Dilution
g
200% i' 200%
0% II0% � I -� —7
DFSA MMF DFSA MMF
8
Notes:
Sample preparation in the range of 2 to 1,000 ng/L is by solid phase extraction
3 ng/L- nanograms per liter
DFSA-difluorosulfoacetic acid Matrix Spike Recoveries and Measured Concentrations in River Water
i MMF -difluoromalonic acid in the Range of 2 to 1,000 ng/L for DFSA and MMF Acid
Chemours Fayettevile Works,North Carolina
° Ideal recovery of matrix spikes and
ideal measured concentration/expected concentration
If the matrix spike addition was less than 4x the concentration of the sample or the Geosyntec GeosyntecConsultantsofNC,P.C. Figure
NC License No.:C 3500 and C 295
measured concentration was below the reporting limit, the result was not plotted. consultants
1 5
River Water is from the Cape Fear River(collected June 26, 2020 at River Mile 84) i Raleigh September 2020

River Water Amended with 2,000 ng/L of Each Compound
Matrix Spike Recovery Measured Concentration/Expected Concentration
120% 120%
c
o
100% 100%
ro
Y C
X 80% o II Undiluted 80% ■Undiluted
V
2 60% 2x Dilution " ■60% 2x Dilution
5x Dilution x II 5x Dilution
c 40% - 40%
v 10x Dilution a ■10x Dilution
z
20% v 20%
2
0% 0%
DFSA MMF DFSA MMF
River Water Amended with 10,000 ng/L of Each Compound
I
Matrix Spike Recovery Measured Concentration/Expected Concentration
120% 120% i
100% 2 100%
Y u.
41
a u 80% II Undiluted
X S0% •Undiluted o
v
-13
' 60% 2x Dilution v 60% 2x Dilution
o c,
i 5x Dilution x 5x Dilution
40%
U 40% 10x Dilution v 10x Dilution
20% a w 20% 1 00 ..
ll ..:
DFSA MMF DFSA MMF
River Water Amended with 100,000 ng/L of Each Compound
Matrix Spike Recovery Measured Concentration/Expected Concentration
120% 120%
c
100% 2 100%
y 1
Y C
x 80% e Undiluted o 80% ®Undiluted
v
2 60% 2x Dilution v 60% 2x Dilution
`o
..' ,' 0 5x Dilution x 5x Dilution
> 40% — 40%
cu lOx Dilution F.o 10x Dilution
cc
20% d 20%
0%
■. I III
DFSA MMF DFSA MMF
a
g
1
a
a
a
a
Ii
0
S
Notes:
Sample preparation in the range of 1,000 to 100,000 ng/L is by solvent dilution/direct injection
ng/L - nanograms per liter
DFSA- difluorosulfoacetic acid Matrix Spike Recoveries and Measured Concentrations in River Water
MMF - difluoromalonic acid in the Range of 1,000 to 100,000 nglL for DFSA and MMF
Chemours Fayettevile Works,North Carolina
Ideal recovery of matrix spikes and
1 ideal measured concentration/expected concentration
Fi ure
3. If the matrix spike addition was less than 4x the concentration of the sample or the Geosyntec'- Geosyntec Consultants of NC,P.C. 9
NC License No.:C 3500 and C 295
measured concentration was below the reporting limit, the result was not plotted. consultants
6
River Water is from the Cape Fear River (collected June 26, 2020 at River Mile 84) Raleigh September 2020

Attachment J. 1 RO PERMEATE — 2 D Form

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works OMB No.2040-0004
U.S.Environmental Protection Agency
Form Application for NPDES Permit to Discharge Wastewater
2D NPDES EPA NEW MANUFACTURING,COMMERCIAL, MINING,AND SILVICULTURAL OPERATIONS
THAT HAVE NOT YET COMMENCED DISCHARGE OF PROCESS WASTEWATER
SECTION 1. EXPECTED OUTFALL LOCATION(40 CFR 122.21(k)(1))
1.1 Provide information on each of the facility's outfalls in the table below.
Outfall Receiving Water
g Number Name Latitude Longitude
1-14
--- -
O 103 Cape Fear River 78` 50' 30" 34" 50' 37"
0
SECTION 2.EXPECTED DISCHARGE DATE(40 CFR 122.21(k)(2))
a 2.1 Month Day Year
x y December 01 2020
wo
SECTION 3.AVERAGE FLOWS AND TREATMENT(40 CFR 122.21(k)(3)(i))
3,1 For each outfall identified under Item 1.1, provide average flow and treatment information.Add additional sheets as
necessary.
**Outfall Number** 103
Operations Contributing to Flow
Operation Average Flow
Process water recycling 0.028 mgd
mgd
mgd
R
d mgd
I-
mgd
N
O Treatment Units
Description Code from Final Disposal of Solid or Liquid
(include size,flow rate through each treatment unit, Exhibit 2D-1 Wastes Other Than by Discharge
> retention time,etc.)
Reverse Osmosis(cartridge and bag filters) 1-S Recycle,WWTP,or off-site disposal
Granular Activated Carbon(filter skids) 2-A Recycle
Mixed Bed Ion Exchange 2-J Recycle
Neutralization 2-K N/A
EPA Form 3510-2D(Revised 3-19) Page 1

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works OMB No.2040-0004
3.1 "Outfall Number**
Cont. Operations Contributing to Flow
Operation Average Flow
mgd
mgd
mgd
mgd
mgd
Treatment Units
Description Code from Final Disposal of Solid or Liquid
(include size,flow rate through each treatment unit, Exhibit 2D-1 Wastes Other Than by Discharge
retention time,etc.)
C
r
0
0
E
V
C
y **Outfall Number**
0 Operations Contributing to Flow
.- Operation Average Flow
a>
mgd
mgd
mgd
mgd
mgd
Treatment Units
Description Code from Final Disposal of Solid or Liquid
(include size,flow rate through each treatment unit, Exhibit 2D-1 Wastes Other Than by Discharge
retention time,etc.)
Information regarding other outfalls provided in the 2C forms for Outfall 001 and 002 and the 2D form for the
Thermal Oxidizer
EPA Form 3510-2D(Revised 3-19) Page 2

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works OMB No.2040-0004
SECTION 4.LINE DRAWING(40 CFR 122.21(k)(3)(ii))
co 4.1 Have you attached a line drawing to this application that shows the water flow through your facility with a water
c .3 balance?(See instructions for drawing requirements. See Exhibit 2D-2 at end of instructions for example.)
J 12
o 0 Yes ❑ No
SECTION 5. INTERMITTENT OR SEASONAL FLOWS(40 CFR 122.21(k)(3)(iii))
5.1 Except for stormwater runoff, leaks,or spills, are any expected discharges described in Sections 1 and 3 intermittent
or seasonal?
See Attachment J.2
✓❑ Yes 0 No 4 SKIP to Section 6.
5.2 Provide information on intermittent or seasonal flows for each applicable outfall.Attach additional pages,if
necessary.
Outfall Operations Frequency Rate and Volume
Number (list) Average Average Maximum Daily Maximum Total Duration
Da slWeek Months/Year Dischar a Volume
days/week months/year mgd gallons days
N — —
o days/week months/year mgd gallons days
it
v days/week months/year mgd gallons days
0
in Outfall Operations Fre uency Rate and Volume
o Number (list) Average Average Maximum Daily Maximum Total Duration
Da slWeek Months/Year Discharge Volume
days/week months/year mgd gallons days
E
c days/week months/year mgd gallons days
days/week months/year mgd gallons days
Outfall Operations Frequency Rate and Volume
Number (list) Average Average Maximum Daily Maximum Total Duration
Days/Week Months/Year Discharge Volume
days/week months/year mgd gallons days
days/week months/year mgd gallons days
days/week months/year mgd gallons days
SECTION 6.PRODUCTION(40 CFR 122.21(k)(4))
6.1 Do any effluent limitation guidelines(ELGs)promulgated by EPA under CWA Section 304 apply to your facility?
' ✓❑ Yes ❑ No 4 SKIP to Section 7.
= 6.2 Provide the following information on applicable ELGs.
o ELG Category ELG Subcategory Regulatory Citation
o
7
o OCPSF Subpart D 40 CFR 414.4
a. J
EPA Form 3510-2D(Revised 3-19) Page 3

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works OMB No.2040-0004
6.3 Are the limitations in the applicable ELGs expressed in terms of production(or other measure of operation)?
❑ Yes ❑ No 4 SKIP to Section 7.
6.4 Provide an expected measure of average daily production expressed in terms and units of applicable ELGs.
Expected Actual Average Daily Production for First Three Years
Outfall Year Operation,Product,or Material Quantity per Day Unit of Measure
Number (note basis if applicable)
Year 1
Year 2
Year 3
0
U
C
Year 1
0
a Year 2
Year 3
Year 1
Year 2
Year 3
SECTION 7.EFRUENT CIAARACTERISTICS(40 CFR 122.21(k)(5))
See the instructions to determine the parameters and pollutants you are required to monitor and,in turn,the tables you must
complete. Note that not all applicants need to complete each table.
Table A.Conventional and Non-Conventional Parameters
7.1 Are you requesting a waiver from your NPDES permitting authority for one or more of the Table A parameters for any
of your outfalls?
❑ Yes ❑✓ No 4 SKIP to Item 7.3.
7.2 If yes, indicate the applicable outfalls below.Attach waiver request and other required information to the application.
Outfall number Outfall number Outfall number
7.3 Have you have provided estimates or actual data for all Table A parameters for each of your outfalls for which a
waiver has not been requested and attached the results to this application package?
No;a waiver has been requested from my
✓❑ Yes ❑ NPDES permitting authority for all parameters at
all outfalls.
Table B.Certain Conventional and Non-Conventional Pollutants
w 7.4 Have you checked"Believed Present"for all pollutants listed in Table B that are limited directly or indirectly by an
applicable ELG?
❑✓ Yes ❑ No
7.5 Have you checked"Believed Present"or"Believed Absent"for all remaining pollutants listed in Table B?
✓❑ Yes ❑ No
7.6 Have you provided estimated data for those Table B pollutants for which you have indicated are`Believed Present"
in your discharge?
❑✓ Yes ❑ No
Page 4
EPA Form 3510-2D(Revised 3-19)

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works OMB No.2040-0004
Table C.Toxic Metals,Total Cyanide,and Total Phenols
7.7 Have you indicated whether pollutants are"Believed Present"or"Believed Absent"for all pollutants listed on Table C
for all outfalls?
❑✓ Yes ❑ No
7.8 Have you completed Table C by providing estimated data for pollutants you indicated are"Believed Present,"
including the source of the information,for each applicable outfall?
❑✓ Yes ❑ No
Table D.Organic Toxic Pollutants(GC/MS Fractions)
7.9 Doyouqualifyfor a small business exemption under the criteria specified in the Instructions?
P P
❑ Yes 4 Note that you qualify at the top of ❑ No
Table D,then SKIP to Item 7.12.
a 7.10 Have you indicated whether pollutants are"Believed Present"or"Believed Absent"for all pollutants listed on Table D
for all outfalls?
❑✓ Yes ❑ No
7.11 Have you completed Table D by providing estimated data for pollutants you indicated are"Believed Present,"
tfi
including the source of the information,for each applicable outfall?
CD ❑✓ Yes ElNo
2,3,7,8-Tetrachlorodibenzo-p-Dioxin(TCDD)
ea
7.12 Does the facility use or manufacture one or more of the 2,3,7,8-TCDD congeners listed in the Instructions,or do you
know or have reason to believe that TCDD is or may be present in effluent from any of your outfalls?
❑ Yes 1 No
Table E.Certain Hazardous Substances and Asbestos
7.13 Have you indicated whether pollutants are"Believed Present"or"Believed Absent"for all pollutants listed in Table E
for all outfalls?
❑ Yes ❑ No
7.14 Have you completed Table E by reporting the reason the pollutants are expected to be present and available
quantitative data for pollutants you indicated are"Believed Present"for each applicable outfall?
✓❑ Yes ❑ No
Intake Credits,Tables A through E
7.15 Are you applying for net credits for the presence of any of the pollutants on Tables A through E for any of your
outfalls?
❑ Yes 4 Consult with your NPDES permitting ❑ No
authorit .
SECTION 8. ENGINEERING REPORT(40 CFR 122.21(k)(6))
8.1 Do you have any technical evaluations of your wastewater treatment,including engineering reports or pilot plant
studies?
c The Engineering report includes the PFAS data_
❑✓ Yes No 4 SKIP to Item 8.3.
8.2 Have you provided the technical evaluation and all related documents to this application package?
❑✓ Yes ❑ No
8.3 Are you aware of any existing plant(s)that resemble production processes,wastewater constituents,or wastewater
w treatment at your facility?
❑ Yes ❑✓ No 4 SKIP to Section 9.
EPA Form 3510-2D(Revised 3-19) Page 5

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works OMB No.2040-0004
8.4 Provide the name and location of the similar plants.
0 Name of Similar Plants Location of Similar Plants
cc w
a) c
a)
cv
-- ---
w
SECTION 9.OTHER INFORMATION(40 CFR 122.21(k)(7))
9.1 Have you attached any optional information that you would like considered as part of the application review process
(i.e., material beyond that which you have already noted in the application as being attached)?
j ❑ Yes ❑✓ No 4 SKIP to Section 10.
0 9.2 List the additional items and briefly note why you have included them.
1.
'6
2.
Q)
0 3.
4.
5.
SECTION 10.CHECKLIST AND CERTIFICATION STATEMENT(40 CFR 122.22(a)and(d))
10.1 In Column 1 below, mark the sections of Form 2D that you have completed and are submitting with your application.
For each section,specify in Column 2 any attachments that you are enclosing to alert the permitting authority. Note
that not all applicants are required to complete all sections or tables,or provide attachments.
Column 1 Column 2
Section 1: Expected Outfall
Location ❑ w/attachments(e.g.,responses for additional outfalls)
Section 2: Expected
Discharge Date ❑ w/attachments
❑ Section 3:Average Flows ❑ w/attachments
and Treatment
E ❑ Drawing ✓ w/line drawing ❑ w/additional attachments
co ✓ Section 4: Line ❑
❑✓ Section 5: Intermittent or ❑ w/attachments
g Seasonal Flows
❑ Section 6: Production ❑ w/attachments
cco w/Table A waiver
❑ request or ❑✓ Table A
N approval
❑ Section 7: Effluent ❑✓ Table B ❑✓ Table C
- ✓ Characteristics
❑✓ Table D ✓❑ Table E
❑ w/other add'I compounds may be present in effluent-see Att.J.2-RO
attachments engineering report
❑ Section 8: Engineering ❑ w/technical evaluations and related attachments
Report
❑ Section 9:Other Information ❑ w/optional information
Section 10:Checklist and
Certification Statement ❑ w/attachments
EPA Form 3510-2D(Revised 3-19) Page 6

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NCD 047 368 642 NC0003573 Chemours Fayetteville Works OMB No.2040-0004
c
10.2 Certification Statement
ai
g /certify under penalty of law that this document and all attachments were prepared under my direction or supervision
s in accordance with a system designed to assure that qualified personnel properly gather and evaluate the
c information submitted.Based on my inquiry of the person or persons who manage the system,or those persons
Rdirectly responsible for gathering the information,the information submitted is,to the best of my knowledge and
s~ = belief,true,accurate,and complete.I am aware that there are significant penalties for submitting false information,
d including the possibility of fine and imprisonment for knowing violations.
0 Name(print or type first and last name) Official title
� BRIAN D.LONG
zii_i ✓ e 4,,,-
PLANT MANAGER
Signature 0 c- Date signed
d
`l/�5/A
U
EPA Form 3510-2D(Revised 3-19) Page 7

This page intentionally left blank.

EPA Identification Number Facility Name Outfall Number Form Apprc '05/19
NCD 047 368 642 Chemours Fayetteville Works
OMB N .GVYV-0004
TABLE A.CONVENTIONAL AND NON CONVENTIONAL PARAMETER ESTIMATES(40 CFR 122.21(k)(5)(i))1
Effluent Data Intake Water
Waiver Units Maximum DailyAverage
Pollutant Requested g Daily Source of Information Believed Present?
if applicable) Discharge Discharge (check only one response per
( (required) (if available) (use codes in instructions) parameter)
❑ Check here if you have applied to your NPDES authority for a waiver for all of the pollutants listed on this table for the noted outfall.
Biochemical oxygen Concentration mg/L 23.60 <9.82 1-R0 Permeate Analysis
1 demand(BOD5) El El Yes ❑ No
Mass lb/day 5.51 <2.293 1-R0 Permeate Analysis
Chemical oxygen demand Concentration mg/L 130.00 106.40 1-R0 Permeate Analysis
2. (COD) ❑ 0 Yes 0 No
Mass lb/day 30.36 24.85 1-R0 Permeate Analysis
Total organic carbon Concentration mg/L 39.80 32.70 1-R0 Permeate Analysis
3. 0(TOC) 0 Yes El No
Mass lb/day 9.29 7.63 1-RO Permeate Analysis
Total suspended solids Concentration mg/L <5 <3.2 1-R0 Permeate Analysis
4. CI(TSS) 0 Yes 0 No
Mass lb/day <1.17 <0.747 1-RO Permeate Analysis
Concentration mg/L 0.56 <0.3 1-RO Permeate Analysis
5. Ammonia(as N) ❑ Ei 0 Yes 0 No
Mass lb/day 0.13 <0.070 © 1-RO Permeate Analysis
6. Flow ❑ Rate See Attachment J.2 0 Yes ❑ No
Temperature(winter) 0 °C °C
7. El Yes El No
Temperature(summer) ❑ °C °C 36 34 1-RO Permeate Analysis
pH (minimum) ❑ Standard units S.U. 9.3 8.8 1-RO Permeate Analysis
8. D Yes ❑ No
pH (maximum) ❑ Standard units S.U. 9.5 8.8 1-RO Permeate Analysis
1 Sampling shall be conducted according to sufficiently sensitive test procedures(i.e., methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I, subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2D(Revised 3-19) Page 1

This page intentionally left blank.

EPA Identification Number Facility Name Outfall Number Form ApproN 15/19
NCD 047 368 642 Chemours Fayetteville Works OMB No.cu4u-0004
TABLE B.CERTAIN CONVENTIONAL AND NON CONVENTIONAL POLLUTANTS(40 CFR 122.21(k)(5)(ii))1
Presence or Absence Estimated Data for Pollutants Expected to be Present or Limited by an ELG
(check one) (Provide both concentration and mass estimates for each pollutant.)
Pollutant Effluent Intake Water
Believed Believed Maximum Daily Average Daily Believed Present?
Present Absent Units Discharge Discharge Source of Information (check only one
(required) (if available) (use codes in instructions) response per item)
❑ Check(V)here if you believe all pollutants listed to be absent from the discharge.You need not complete Table B for the noted outfall unless you have quantitative data available.
Bromide Concentration
1. (24959 67 9) El 0Mass El Yes 0No
Chlorine,total Concentration
2. residual 0 0 0Yes 0 No
Mass
Concentration
3. Color ❑ ✓❑ ✓❑ Yes ❑ No
Mass
Concentration
4. Fecal coliform 0 ❑✓ ❑✓ Yes 0 No
Mass
Fluoride Concentration
5' (16984-48-8) ❑✓ 0 Mass 0Yes 0 No
Concentration mg/L 0.03 la <0.02 p 1-RO Permeate Analysis
6. Nitrate-nitrite 00 ❑✓ Yes 0 No
Mass lb/day 0.007 p 0.005 p
Nitrogen, total Concentration
7' organic(as N) 0 ❑ Mass 0Yes 0 No
Concentration
8. Oil and grease ❑ ❑✓ ✓❑ Yes ❑ No
Mass
Phosphorus(as P), Concentration mg/L 0.40 El <0.14 0 1-RO Permeate Analysis
9' total(7723 14 0) El 0 Mass ❑ Yes ❑✓ No
lb/day 0.093 al <0.033 p
10. Sulfate(as SO4) Concentration
(14808 79 8) ❑ Mass 0 Yes El No
Concentration
11. Sulfide(as S) ❑✓ 0 ❑ Yes ✓❑ No
Mass
EPA Form 3510-2D(Revised 3-19) Page 3

EPA Identification Number Facility Name Outfall Number Form Appror )5/19
NCD 047 368 642 Chemours Fayetteville Works OMB N .. -0004
TABLE B.CERTAIN CONVENTIONAL AND NON CONVENTIONAL POLLUTANTS(40 CFR 122.21(k)(5)(ii))1
Presence or Absence Estimated Data for Pollutants Expected to be Present or Limited by an ELG
(check one) (Provide both concentration and mass estimates for each pollutant.)
Pollutant Effluent Intake Water
Believed Believed Maximum Daily Average Daily Source of Information Believed Present?
Present Absent Units Discharge Discharge (use codes in instructions) (check only one
(required) (if available) response per item)
Sulfite(as SO3) Concentration
12. (14265 45 3) ❑ 0 ❑ Yes El No
Mass
Concentration
13. Surfactants ❑ ✓❑ ❑✓ Yes ❑ No
Mass
14. Aluminum,total Concentration
(7429-90-5) 0 El Mass 0 Yes ElNo
Barium,total Concentration
15. (7440 39 3) El 0 0Yes El No
Mass
16. Boron,total Concentration
(7440-42-8) 0 0 Mass ❑✓ Yes 0 No
Cobalt,total Concentration
17. (7440 48 4) 0 ❑✓ 0Yes CI No
Mass
Iron, total Concentration
18. (7439 89 6) 0 0 Mass ❑✓ Yes 0 No
19 Magnesium,total Concentration
(7439 95 4) 0 CI Mass 0Yes El No
Molybdenum,total Concentration
20. (7439 98 7) 0 0 Mass 0Yes 0 No
Manganese,total Concentration
21. ❑(7439 96 5) 0 Mass 0Yes 0 No
Tin,total Concentration
22. 0 ❑✓ 0 Yes ElNo
(7440-31-5) Mass
EPA Form 3510-2D(Revised 3-19) Page 4

EPA Identification Number Facility Name Outfall Number Form Approi )5/19
NCD 047 368 642 Chemours Fayetteville Works OMB No.cu4u-0004
TABLE B.CERTAIN CONVENTIONAL AND NON CONVENTIONAL POLLUTANTS(40 CFR 122.21(k)(5)(ii))1
Presence or Absence Estimated Data for Pollutants Expected to be Present or Limited by an ELG
(check one) (Provide both concentration and mass estimates for each pollutant.)
Pollutant Effluent Intake Water
Believed Believed Maximum Daily Average DailyBelieved Present?
Present Absent Units Discharge Discharge Source of Information (check only one
(required) (if available) (use codes in instructions) response per item)
Titanium,total Concentration
23. (7440 32 6) Mass El Yes ID No
24. Radioactivity
24.1 Alpha,total ElConcentration ❑ Yes ✓❑ No
Mass
•
24.2 Beta,total ElConcentration ❑✓ Yes ❑ No
Mass
24.3. Radium,total ❑ ElConcentration ❑ Yes ✓❑ No
Mass
24.4 Radium 226, total ❑ ❑✓ Concentration
Mass El Yes ❑ No
1 Sampling shall be conducted according to sufficiently sensitive test procedures(i.e., methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I, subchapter N or 0. See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2D(Revised 3-19) Page 5

w
This page intentionally left blank.

r EPA Identification Number Facility Name WI Outfall Number Form Al 103/05/19
'.- NCD 047 368 642 Chemours Fayetteville Works OM....,,.2040-0004
TABLE C.TOXIC METALS,TOTAL CYANIDE,AND TOTAL PHENOLS(40 CFR 122.21(k)(5)(iii)(A))1
Presence or Absence Estimated Data for Pollutants Expected to be Present in Discharge
(check one) (Provide both concentration and mass estimates for each pollutant.)
Pollutant Effluent Intake Water
(CAS Number,if available) Believed Believed Maximum Average
DailyDailySource of Information Believed Present?
Present Absent Units
Discharge Discharge (Use codes in Instructions.) (Check only one
(required) (if available) response per pollutant)
❑✓ Check(✓)here if you believe all pollutants listed to be absent from the discharge.You need not complete Table C for the noted outfall unless you have quantitative data
available.
1. Antimony,Total Concentration mg/L <0.u1 <0.U1
(7440 36 0) El El MESS lb/day <0.002 <0.002 1-RO Permeate Analysis ElYes ❑✓ No
11
2. Arsenic,Total Concentration mg/L <0.01 <0.01
(7440 38 2) ElMass Ib/day <U.UU2 <0.002 1-RO Permeate Analysis El Yes El No
3. Beryllium,Total Concentration mg/L <u.002 <0.002
(7440-41-7) ❑ El Mass lb/day <0.0004 <0.0004 1-RO Permeate Analysis 0 Yes ❑✓ No
4. Cadmium,Total Concentration mg/L <0.002 <0.002(7440-43-9) El ❑ Mass lb/day <0.0005 <0.0005 1-RO Permeate Analysis ❑ Yes ❑� No
5. Chromium, Total ID ❑ Concentration El Yes El No
(7440-47-3) Mass
6. Copper, Total Concentration
El El(7440-50-8) Mass El Yes 0No
7. Lead,Total Concentration
(7439 92 1) El El ElElYes ❑✓ No
8. Mercury,Total Concentration mg/L <U.0002 <0.u02
(7439 97 6) ElMass Ib/day <o.000U4 <U.000o4 1-RO Permeate Analysis El Yes ❑✓ No
9. Nickel,Total El El El
✓❑ Yes ❑ No
(7440-02-0) Mass
10. Selenium, Total Concentration mg/L <0.01 <0.01
(7782-49-2) El ❑ Mass lb/day <0.002 <0.002 1-RO Permeate Analysis ❑ Yes ✓❑ No
11. Silver, Total Concentration mg/L <0.005 <0.005
(7440 22 4) ElMass Ib/day <0.0012 <O.00lz 1-RO Permeate Analysis 0 Yes El No
12. Thallium, Total Concentration mg/L - <0.01 <0.01
❑ El(7440 28 0) Mass 1-RO Permeate Analysis ❑ Yes ❑✓ No
13. Zinc,Total Concentration
(7440 66 6) ❑ 0Mass 0Yes El No
14. Cyanide, Total0 El Concentration
(57 12 5) Mass ID Yes ❑✓ No
15. Phenols,Total ❑ ✓❑ Concentration ❑ Yes ✓❑ No
Mass
1 Sampling shall be conducted according to sufficiently sensitive test procedures(i.e., methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I, subchapter N or 0. See Instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2D(Revised 3-19) Page 7

This page intentionally left blank.

T EPA Identification Number I Facility Name Outfall Number Form i ad 03/05/19
NCD 047 368 642 Chemours Fayetteville Works 01.,E 2040-0004
TABLE D.ORGANIC TOXIC POLLUTANTS(Gas ChromatographylMass Spectrometry or GCIMS Fractions)(40 CFR 122.21(k)(5)(iii)(B))'
Presence or Absence Estimated Data for Pollutants Expected to Be Present in Discharge
(check one) (provide both concentration and mass estimates for each pollutant)
Pollutant Effluent Intake Water
(CAS Number,if available) Believed Believed Units Maximum Average Source of Believed Present?
Present Absent Daily Daily Information (check only one response per
Discharge Discharge (use codes in instructions) pollutant)
0 Check here if all pollutants listed in Table D are expected to be absent from your facility's discharge.
❑ Check here if the facility believes it is exempt from Table D reporting requirements because it is a qualified small business. See the instructions for exemption criteria and for a list
of materials you must attach to the application.
Note: If you check either of the above boxes,you do not need to complete Table D for the noted outfall unless you have quantitative data available.
1.Organic Toxic Pollutants(GC/MS Fraction-Volatile Compounds)
1.1 Acrolein Concentration mg/L <0.05 <0.05
(107-02-8) 0 El1-RO Permeate El Yes ✓❑ No
Mass lb/day <0.012 <0.012 Analysis
1.2 Acrylonitrile Concentration mg/L <0.005 <0.005 1-RO Permeate
(107-13-1) El 0 El Yes 0 No
Mass lb/day <0.0012 <0.0012 Analysis
1.3 Benzene Concentration mg/L <0.0005 <0.0005 1 RO Permeate
(71 43 2) 0 Mass lb/day <0.00012 <0.00012 Analysis ❑ Yes El No
1.4 Bromoform Concentration mg/L <0.0005 <0.0005 1 RO Permeate
(75 25 2) ❑ 0 ❑ Yes ❑ No
Mass lb/day <0.00012 <0.00012 Analysis
1.5 Carbon tetrachloride Concentration mg/L <0.0005 <0.0005(56 23 5) 1 RO Permeate
El El El Yes El No
Mass lb/day <0.00012 <0.00012 Analysis
1.6 Chlorobenzene Concentration mg/L <0.0005 <0.00050 El 1 RO Permeate
(108 90 7) Mass lb/day <0.00012 <0.00012 Analysis ❑ Yes 0 No
1.7 Chlorodibromomethane Concentration mg/L <0.0005 <0.0005 1 RO Permeate
(124 48 1) 0 Mass lb/day <0.00012 <0.00012 Analysis ❑ Yes 0 No
1.8 Chloroethane Concentration mg/L <0.0025 <0.0025 1 RO Permeate
(75 00 3) El Mass lb/day <0.00058 <0.00058 Analysis El Yes ✓❑ No
1.9 2-chloroethylvinyl ether Concentration mg/L <0.05 <0.05 1 RO Permeate
(110 75 8) ElMass lb/day <0.012 <0.012 Analysis ❑ Yes ❑✓ No
1.10 Chloroform(67-66-3) 0 ❑ Concentration mg/L <0.0005 <0.0005 1 Ro Permeate 0 Yes ✓❑ No
Mass lb/day <0.00012 <0.00012 Analysis _
1.11 Dichlorobromomethane Concentration mg/L <0.0005 <0.0005 El 1 RO Permeate
(75 27 4) ElMass lb/day <0.00012 <0.00012 Analysis
El Yes 0 No
EPA Form 3510-2D(Revised 3-19) Page 9

EPA Identification Number I Facility Name ^ Outfall Number Form, ?d 03/05/19
NCD 047 368 642 Chemours Fayetteville Works 0,.,,.. 2040-0004
TABLE D.ORGANIC TOXIC POLLUTANTS(Gas Chromatography/Mass Spectrometry or GC/MS Fractions)(40 CFR 122.21(k)(5)(iii)(B))1
Presence or Absence Estimated Data for Pollutants Expected to Be Present in Discharge
(check one) (provide both concentration and mass estimates for each pollutant)
Pollutant Effluent Intake Water
(CAS Number,if available) Believed Believed Units Maximum Average Source of Believed Present?
Present Absent Daily Daily Information (check only one response per
Discharge Discharge (use codes in instructions) pollutant)
1.12 1,1-dichloroethane Concentration mg/L <0.0005 <0.0005
g 1-RO Permeate
(75-34-3) ❑ ❑✓ ❑ Yes ❑✓ No
Mass lb/day <0.00012 <0.00012 Analysis
1.13 1,2-dichloroethane Concentration mg/L <0.0005 <0.0005 1-RO Permeate
(107-06-2) 0 ❑✓ Analysis ❑ Yes ❑✓ No
Mass lb/day <0.00012 <0.00012
1.14 1,1-dichloroethylene Concentration mg/L <0.0005 <0.0005 1-RO Permeate
(75-35-4) ❑ ✓❑ Analysis ❑ Yes ❑✓ No
Mass lb/day <0.00012 <0.00012
1.15 1,2-dichloropropane Concentration mg/L <0.0005 <0.0005 1 RO Permeate
(78 87 5) ❑ El Mass lb/day <0.00012 <0.00012 Analysis El yes El No
1.16 1,3-dichloropropylene Concentration mg/L <0.0005 <0.0005 El 1 RO Permeate
(542 75 6) El Mass lb/day <0.00012 <0.00012 Analysis 0 Yes 0 No
1.17 Ethylbenzene Concentration mg/L <0.0005 <0.0005 1-RO Permeate
(100 41 4) ❑ ElMass lb/day <0.00012 <0.00012 Analysis El Yes NO
1.18 Methyl bromide Concentration mg/L <0.0025 <0.0025 El 1-RO Permeate
(74 83 9) ❑ Mass lb/day <0.00058 <0.00058 Analysis El Yes El No
1.19 Methyl chloride Concentration mg/L <0.00125 <0.00125 1 RO Permeate
(74 87 3) El
✓
Mass lb/day <0.000292 <0.000292 Analysis Yes No
1.20 Methylene chloride Concentration mg/L <0.002920 <0.00264 El 1 RO Permeate
(75 09 2) Mass lb/day <0.000682 <0.000682 Analysis El Yes ❑✓ NO
1.21 1,1,2,2-tetrachloroethane Concentration mg/L <0.0005 <0.0005 1-RO Permeate
(79-34-5) 0 El Yes 0 No
Mass lb/day <0.00012 <0.00012 Analysis
1.22 Tetrachloroethylene Concentration mg/L <0.0005 <0.0005 1 RO Permeate
❑ ❑ El Yes ✓❑ No
(127 18 4) Mass lb/day <0.00012 <0.00012 Analysis
1.23 Toluene ❑ ❑ Concentration mg/L 0.00087 0.00063 1 RO Permeate ❑ Yes ✓❑ No
(108-88-3)
Mass Ib/day 0.000202 0.000202 Analysis
1.24 1,2-trans-dichloroethylene Concentration mg/L <0.0005 <0.0005 El 1 RO Permeate
(156 60 5) 0 Mass lb/day <0.00012 <0.00012 Analysis ❑ Yes El No
EPA Form 3510-2D(Revised 3-19) Page 10

EPA Identification Number I Facility Name 1 1 IMir Outfall Number Form ed 03/05/19
Orvio rvu.2040-0004
NCD 047 368 642 Chemours Fayetteville Works
TABLE D.ORGANIC TOXIC POLLUTANTS(Gas Chromatography/Mass Spectrometry or GCIMS Fractions)(40 CFR 122.21(k)(5)(iii)(B))1
Presence or Absence Estimated Data for Pollutants Expected to Be Present in Discharge
(check one) (provide both concentration and mass estimates for each pollutant)
Pollutant Effluent Intake Water
(CAS Number,if available) Believed Believed Units Maximum Average Source of Believed Present?
Present Absent Daily Daily Information (check only one response per
Discharge Discharge (use codes in instructions) pollutant)
1.25 1,1,1-trichloroethane155 ❑ ❑ Concentration mg/L <0.0005 <0.0005 1 RO Permeate ✓
(71-55-6) El Yes No
Mass Ib/day <0.00012 <0.00012 Analysis
1.26 (79� ic ur loroethane 0-5) El ❑ Concentration mg/L <0.0005 <0.0005 1-RO Permeate El Yes 0 No
Mass lb/day <0.00012 <0.00012 Analysis
1.27 Trichloroethylene Concentration mg/L <0.0005 <0.0005 1 RO Permeate
(79-01-6) El El ❑ Yes 0 No
Mass lb/day <0.00012 <0.00012 Analysis
1.28 Vinyl chloride Concentration mg/L <0.0005 <0.0005 1 RO Permeate
(75 01 4) El El
Mass lb/day <0.00012 <0.00012 Analysis ❑ Yes 0 No
2.Organic Toxic Pollutants(GCIMS Fraction-Acid Compounds)
2.1 2-chlorophenol Concentration mg/L <0.0118 <0.01036 1-RO Permeate
(95 57 8) El ❑ Mass lb/day <0.00276 <0.002419 Analysis ❑ Yes ❑✓ No
2.2 2,4-dichlorophenol Concentration mg/L <0.0118 <0.01036 1-RO Permeate
(120 83 2) 0 El
Mass lb/day <0.00276 <0.002419 Analysis ❑ Yes ❑✓ No
2.3 2,4-dimethylphenol Concentration mg/L <0.05 <0.01836 1-RO Permeate
(105 67 9) 0 Mass lb/day <0.012 <0.004287 Analysis ❑ Yes ❑✓ No
2.4 4,6-dinitro-o-cresol Concentration mg/L <0.0118 <0.01036 1-RO Permeate
(534 52 1) 0 Mass Ib/day <0.00276 <0.002419 Analysis 0 Yes ❑✓ No
2.5 2,4-dinitrophenol Concentration mg/L <0.0118 <0.01036
(51-28-5) El g 1 RO Permeate ❑ Yes 0 No
Mass lb/day <0.00276 <0.002419 Analysis
2.6 2-nitrophenol Concentration mg/L <0.0118 <0.01036
(88-75-5) El ❑✓ g 1 RO Permeate Mass lb/day <0.00276 <0.002419 Analysis
0 Yes ❑ No
2.7 4-nitrophenol Concentration mg/L <0.0118 <0.01036
(100-02-7) El ❑✓ g 1 Ro Permeate ❑ Yes ❑✓ No
Mass lb/day <0.00276 <0.002419 Analysis
2.8 p-chloro-m-cresol Concentration mg/L <0.0118 <0.01036
(59-50-7) ❑ 0g 1 Ro Permeate El Yes 0 No
Mass lb/day <0.00276 <0.002419 Analysis
2.9 Pentachlorophenol Concentration mg/L <0.0118 <0.01036
(87-86-5) El ❑✓ g 1 Ro Permeate El Yes 0 No
Mass lb/day <0.00276 <0.002419 Analysis
EPA Form 3510-2D(Revised 3-19) Page 11

EPA Identification Number Facility Name Outfall Number Form, id 03/05/19
OIVID NU.2040-0004
NCD 047 368 642 Chemours Fayetteville Works
TABLE D.ORGANIC TOXIC POLLUTANTS(Gas Chromatography/Mass Spectrometry or GCIMS Fractions)(40 CFR 122.21(k)(5)(iii)(B))l
Presence or Absence Estimated Data for Pollutants Expected to Be Present in Discharge
(check one) (provide both concentration and mass estimates for each pollutant)
Pollutant Effluent Intake Water
(CAS Number,if available) Believed Believed Units Maximum Average Source of Believed Present?
Present Absent Daily Daily Information (check only one response per
Discharge Discharge (use codes in instructions) pollutant)
2.10 Phenol Concentration mg/L <0.0118 <0.01036
(108-95-2) ❑ ✓❑ 1-RO Permeate ❑ Yes ❑✓ No
Mass lb/day <0.00276 <0.002419 Analysis 0
2.11 2,4,6-trichlorophenol Concentration mg/L <0.0118 <0.01036
1-RO Permeate
(88 05 2) ElMass lb/day <0.00276 <0.002419 Analysis 0 Yes No
0
3.Organic Toxic Pollutants(GC/MS Fraction-Base/Neutral Compounds)
3.1 Acenaphthene Concentration mg/L <0.0018 <0.001036
1-RO Permeate
(83 32 9) El ❑ ❑ Yes 0 No
Mass lb/day <0.00028 <0.0002419 Analysis
3.2 Acenaphthylene Concentration mg/L <0.0018 <0.001036
(208-96-8) ❑ ✓❑ 1-RO Permeate ❑ Yes ❑✓ No
Mass lb/day <0.00028 <0.0002419 Analysis 0.
3.3 Anthracene Concentration mg/L <0.0018 <0.001036
(120-12-7) 0 0 1-RO Permeate ❑ Yes 0 No
Mass lb/day <0.00028 <0.0002419 Analysis 0 _
3.4 Benzidine Concentration mg/L <0.018 <0.01036
(92 87 5) ❑ El 1-RO Permeate ❑ Yes 0 No
Mass lb/day <0.0028 <0.002419 Analysis 0
3.5 Benzo(a)anthracene Concentration mg/L <0.0018 <0.001036
(56-55-3) ❑ 0 1-RO Permeate ❑ Yes 0 No
Mass lb/day <0.00028 <0.0002419 Analysis 0
3.6 Benzo(a)pyrene Concentration mg/L <0.0018 <0.001036
1-R0 Permeate
(50-32-8) ❑ Yes ❑✓ No
Mass lb/day <0.00028 <0.0002419 Analysis p_
3.7 3,4-benzofluoranthene Concentration mg/L <0.0018 <0.001036
(205-99-2) 0 0 1-RO Permeate ❑ Yes ❑✓ No
Mass lb/day <0.00028 <0.0002419 Analysis 0
3.8 Benzo(ghi)perylene Concentration mg/L <0.0018 <0.001036
(191-24-2) ❑ 0 1-R0 Permeate ❑ Yes 0 No
Mass lb/day <0.00028 <0.0002419 Analysis 0 _
3.9 Benzo(k)fluoranthene Concentration mg/L <0.0018 <0.001036 1 RO Permeate
(207-08-9) El ❑ Yes 0 No
Mass lb/day <0.00028 <0.0002419 Analysis 0
3.10 Bis(2-chloroethoxy)methane Concentration mg/L <0.0018 <0.001036 1 RO Permeate
(111 91 1) ❑ ❑ Mass lb/day <0.00028 <0.0002419 Analysis 0 0 Yes ✓❑ No
3.11 Bis(2-chloroethyl)ether Concentration mg/L <0.0018 <0.001036 1 RO Permeate
(111 44 4) ❑ Mass lb/day <0.00028 <0.0002419 0 Yes ❑ No
Analysis 0
EPA Form 3510-2D(Revised 3-19) Page 12

EPA Identification Number Facility Name Outfall Number Form, )d 03/05/19
Oivi o NO.2040-0004
NCD 047 368 642 Chemours Fayetteville Works
TABLE D.ORGANIC TOXIC POLLUTANTS(Gas ChromatographylMass Spectrometry or GCIMS Fractions)(40 CFR 122.21(k)(5)(iii)(B))l
Presence or Absence Estimated Data for Pollutants Expected to Be Present in Discharge
(check one) (provide both concentration and mass estimates for each pollutant)
Pollutant Effluent Intake Water
(CAS Number,if available) Believed Believed Maximum Average Source of Believed Present?
Present Absent Units Daily Daily Information (check only one response per
Discharge Discharge (use codes in instructions)_ pollutant)
3.12 Bis(2-chloroisopropyl)ether Concentration mg/L <0.0118 <0.01036 1 RO Permeate
(102-80-1) ❑ CI ❑ Yes ❑✓ No
Mass lb/day <0.00276 0.002419 Analysis CI
3.13 Bis(2-ethylhexyl)phthalate Concentration mg/L <0.00354 <0.003108(117-81-7) 0 1 RO Permeate
CI lb/day CI Yes El No
<0.000827 <0.0007258 Analysis p
3.14 4-bromophenyl phenyl ether Concentration mg/L <0.01 <0.01 1 RO Permeate
(101 55 3) ❑ 0 Yes 0 No
Mass lb/day <0.002 <0.002 Analysis 0
3.15 Butyl benzyl phthalate Concentration mg/L <0.00354 <0.003108 1 RO Permeate
(85 68 7) ❑ 0 Yes ❑� NO
Mass lb/day <0.000827 <0.0007258 Analysis ©
3.16 2-chloronaphthalene Concentration mg/L <0.00118 <0.001036 1 RO Permeate
(91 58 7) ❑ ❑ Yes 0 No
Mass lb/day <0.00276 <0.0002419 Analysis 0
3.17 4-chlorophenyl phenyl ether Concentration mg/I <0.0118 <0.01036 1 RO Permeate
(7005 72 3) ❑ El Yes 0 No
Mass lb/day <0.00276 0.002419 Analysis 0
3.18 Chrysene Concentration mg/L <0.00118 <0.001036 1-RO Permeate
(218 01 9) ❑ 0 Yes CI No
Mass lb/day <0.000276 <0.0002419 Analysis o
3.19 Dibenzo(a,h)anthracene Concentration mg/L <0.00118 <0.001036 1 RO Permeate
(53-70-3) ❑ 0 ❑ Yes ✓❑ No
Mass lb/day <0.000276 <0.0002419 Analysis CI
3.20 1,2-dichlorobenzene Concentration mg/L <0.0005 <0.0005 1-RO Permeate
(95 50 1) 0 El Yes 0 No
Mass lb/day <0.00012 <0.00012 Analysis 0
3.21 1,3-dichlorobenzene Concentration mg/L <0.0005 <0.0005 1 RO Permeate
(541-73-1) 0 CI 0 Yes El No
Mass lb/day <0.00012 <0.00012 Analysis CI
3.22 1,4-dichlorobenzene Concentration mg/L <0.0005 <0.0005(106 46 7) 1 RO Permeate
Mass lb/day <0.00012 <0.00012 Analysis CI ❑ Yes No
3.23 3,3-dichlorobenzidine ❑ ❑ Concentration mg/L <0.0118 <0.01036 1 RO Permeate ❑ Yes CI No
(91 941) Mass lb/day <0.00276 0.002419 Analysis p
3.24 Diethyl phthalate 0 0Concentration mg/L <0.00354 <0.003108 1 RO Permeate ❑ Yes ❑✓ No
(84 66 2) Mass lb/day <0.000827 <0.0007258 Analysis p
3.25 Dimethyl phthalate Concentration mg/L <0.00354 <0.003108 1 RO Permeate
(131-11-3) ❑ ❑ Yes ❑✓ No
Mass lb/day <0.000827 <0.0007258 Analysis p
EPA Form 3510-2D(Revised 3-19) Page 13

EPA Identification Number Facility Name Outfall Number Form I ad 03/05/19
NCD 047 368 642 Chemours Fayetteville Works
OL.,,. 2040-0004
TABLE D.ORGANIC TOXIC POLLUTANTS(Gas Chromatography/Mass Spectrometry or GCIMS Fractions)(40 CFR 122.21(k)(5)(iii)(B))1
Presence or Absence Estimated Data for Pollutants Expected to Be Present in Discharge
(check one) (provide both concentration and mass estimates for each pollutant)
Pollutant Effluent Intake Water
(CAS Number,if available) Believed Believed Units Maximum 1 Average Source of Believed Present?
Present Absent Daily Daily Information (check only one response per
Discharge ' Discharge (use codes in instructions) pollutant)
3.26 Di-n-butyl phthalate Concentration mg/L <0.00354 <0.003108
(84-74-2) ❑ CI1-RO Permeate 0 Yes El No
Mass Ib/day <0.000827 <0.0002758 Analysis gil
3.27 2,4-dinitrotoluene Concentration mg/L <0.0118 <0.01036
(121-14-2) 0 ✓❑ 1-RO Permeate ❑ Yes ✓❑ No
Mass lb/day <0.00276 <0.002419 Analysis p
3.28 2,6-dinitrotoluene Concentration mg/L <0.0118 <0.01036
(606-20-2) ❑ ✓❑ 1-RO Permeate ❑ Yes ❑✓ No
Mass lb/day <0.00276 <0.002419 Analysis
3.29 Di-n-octyl phthalate Concentration mg/L <0.00354 <0.003108
(117-84-0) ❑ ✓❑ 1-RO Permeate ❑ Yes ✓❑ No
Mass lb/day <0.000827 <0.0002758 Analysis CI
3.30 1,2-diphenylhydrazine Concentration
(as azobenzene)(122-66-7) ❑ ✓❑ Mass El Yes CI No
3.31 Fluoranthene Concentration mg/L <0.00118 <0.001036
(206-44-0) 0 ❑ 1-RO Permeate 0 Yes ❑✓ No
Mass lb/day <0.000276 <0.0002419 Analysis CI
3.32 Fluorene Concentration mg/L <0.00118 <0.001036
(86-73-7) ❑ 0 1-RO Permeate 0 Yes ✓❑ No
Mass lb/day <0.000276 <0.0002419 Analysis 0
-
3.33 Hexachlorobenzene Concentration mg/L <0.00118 <0.001036
(118-74-1) 0 ❑✓ 1-R0 Permeate ❑ Yes ✓❑ No
Mass lb/day <0.000276 <0.0002419 Analysis CI
3.34 Hexachlorobutadiene Concentration mg/L <0.0118 <0.01036
(87-68-3) El ❑✓ 1-RO Permeate 0 Yes CI No
Mass lb/day <0.00276 <0.002419 Analysis Q
3.35 Hexachlorocyclopentadiene Concentration mg/L <0.0118 <0.01036
(77-47-4) ❑ ✓❑ 1-R0 Permeate 0 Yes ✓❑ No
Mass lb/day <0.00276 <0.002419 Analysis 0
3.36 Hexachloroethane Concentration mg/L <0.0118 <0.01036
(67-72-1) ❑ ✓❑ 1-R0 Permeate ❑ Yes El No
Mass lb/day <0.00276 <0.002419 Analysis p
3.37. ►ndeno(1,2,3-cd)pyrene Concentration mg/L <0.00118 <0.001036
(193 39 5) ❑ 01-RO Permeate El Yes CI No
Mass lb/day <0.000276 <0.0002419 Analysis Cii
3.38 Isophorone Concentration mg/L <0.0118 <0.01036 ID
1-RO Permeate
(78 59 1) ElMass lb/day <0.00276 <0.002419 Analysis o ❑ Yes ✓❑ No
3.39 Naphthalene Concentration mg/L <0.0025 <0.001336
(91-20-3) ❑ ✓❑ 1 Ro Permeate ❑ Yes ✓❑ No
Mass lb/day <0.00058 <0.000312 Analysis El
EPA Form 3510-2D(Revised 3-19) Page 14

EPA Identification Number Facility Name Outfall Number Form, ?d 03/05/19
Owia No.2040-0004
NCD 047 368 642 Chemours Fayetteville Works
TABLE D.ORGANIC TOXIC POLLUTANTS(Gas Chromatography/Mass Spectrometry or GCIMS Fractions)(40 CFR 122.21(k)(5)(iii)(B))1
Presence or Absence Estimated Data for Pollutants Expected to Be Present in Discharge
(check one) (provide both concentration and mass estimates for each pollutant)
Pollutant Effluent Intake Water
(CAS Number,if available) Believed Believed Units Maximum Average Source of Believed Present?
Present Absent Daily Daily Information (check only one response per
Discharge Discharge (use codes in instructions) pollutant)
3.40 Nitrobenzene Concentration mg/L <0.0118 <0.01036
01-RO Permeate
(98 95 3) Mass <0.00276 <0.002419 Analysis 0 El Yes No
3.41 N-nitrosodimethylamine Concentration mg/L <0.05 <0.02636 1-RO Permeate
(62 75 9) Mass <0.117 <0.006155 Analysis 0 0 Yes ID No
3.42 N-nitrosodi-n-propylamine Concentration mg/L <0.0118 <0.01036(621 64 7) El El 1 RO Permeate
Mass <0.00276 <0.002419 Analysis El Yes El No
3.43 N-nitrosodiphenylamine Concentration mg/L <0.0118 <0.01036 1-RO Permeate
(86 30 6) Mass <0.00276 <0.002419 Analysis 0 Yes 0 No
0
3.44 Phenanthrene Concentration mg/L <0.00118 <0.001036 El 1-RO Permeate
(85 01 8) Mass <0.000276 <0.0002419 Analysis 181,
0 Yes 0 No
3.45 Pyrene Concentration mg/L <0.00118 <0.001036(129 00 0) 0 El 1-RO Permeate
Mass <0.000276 <0.0002419 Analysis El Yes No
3.46 1,2,4-trichlorobenzene Concentration mg/L <0.0118 <0.01036(120 82 1) El 0 1 RO Permeate
Mass <0.00276 <0.002419 Analysis CI El Yes 0 No
4.Organic Toxic Pollutants(GCIMS Fraction-Pesticides)
4.1. Aldrin Concentration
(309-00-2) 0 0 Mass 0 Yes ❑✓ No
-
4.2 a-BHC Concentration
(319-84-6) ❑ 0 Mass ElYes 0 No
4.3 R-BHC Concentration
(319-85-7) 0 0 Mass 0 Yes 0No
4.4 y-BHC Concentration
(58-89-9) 0 0 Mass El Yes ❑✓ No
4.5 b-BHC Concentration
(319-86-8) 0 0 Mass ❑ Yes ❑✓ No
4.6 Chlordane Concentration
(57-74-9) 0 0 Mass 0 Yes 0No
EPA Form 3510-2D(Revised 3-19) Page 15

EPA Identification Number Facility Name Outfall Number Form ad 03/05/19
NCD 047 368 642 Chemours Fayetteville Works Oiwo NO.2040-0004
TABLE D.ORGANIC TOXIC POLLUTANTS(Gas ChromatographylMass Spectrometry or GC/MS Fractions)(40 CFR 122.21(k)(5)(iii)(B))'
Presence or Absence Estimated Data for Pollutants Expected to Be Present in Discharge
(check one) (provide both concentration and mass estimates for each pollutant)
Pollutant Effluent Intake Water
(CAS Number,if available) Believed Believed Units Maximum Average Source of Believed Present?
Present Absent Daily Daily Information (check only one response per
Discharge Discharge (use codes in instructions) pollutant)
4.7 4,4'-DDT Concentration
(50-29-3) ❑ ❑ Mass 0 Yes 0No
4.8 4,4'-DDE Concentration
(72-55-9) 0 ✓❑ Mass ❑ Yes 0 No
4.9 4,4'-DDD Concentration
(72-54-8) ❑ ✓❑ Mass El Yes 0No
4.10 Dieldrin Concentration(60-57-1) 0 0 _
Mass 0 Yes IDNo
4.11 a-endosulfan Concentration
(115-29-7) 0 ❑✓ ❑ Yes 0 No
Mass
4.12 R-endosulfan Concentration
(115-29-7) 0 0 ❑ Yes ❑✓ No
Mass
4.13 Endosulfan sulfate Concentration
(1031-07-8) ❑ ✓❑ ❑ Yes ❑✓ No
Mass
4.14 Endrin Concentration
(72-20-8) ❑ 0 0 Yes ❑✓ No
Mass
4.15 Endrin aldehyde Concentration
(7421-93-4) 0 ✓❑ 0 Yes ❑✓ No
Mass
EPA Form 3510-2D(Revised 3-19) Page 16

EPA Identification Number Facility Name 1 Outfall Number Form I )d 03/05/19
NCD 047 368 642 Chemours Fayetteville Works 0,., .. .2040-0004
TABLE D.ORGANIC TOXIC POLLUTANTS(Gas Chromatography/Mass Spectrometry or GCIMS Fractions)(40 CFR 122.21(k)(5)(iii)(B))1
Presence or Absence Estimated Data for Pollutants Expected to Be Present in Discharge
(check one) (provide both concentration and mass estimates for each pollutant)
Pollutant Effluent Intake Water
(CAS Number,if available) Believed Believed Units Maximum Average Source of Believed Present?
Present Absent Daily Daily Information (check only one response per
Discharge Discharge (use codes in instructions) pollutant)
4.16 Heptachlor Concentration
(76-44-8) ❑ 0 Mass 0 Yes ❑✓ No
4.17 Heptachlor epoxide Concentration
(1024-57-3) 0 0 Mass 0 Yes 0No
4.18 PCB-1242
Concentration
(53469-21-9) 0 0 Mass 0 Yes 0No
4.19 PCB-1254 Concentration
(11097-69-1) ❑ ❑✓ Mass 0 Yes ❑✓ No
4.20 PCB-1221 Concentration
(11104-28-2) 0 ❑✓ Mass 0 Yes ❑✓ No
4.21 PCB-1232 Concentration
(11141-16-5) 0 ❑✓ Mass 0 Yes ❑✓ No
4.22 PCB-1248 Concentration
(12672-29-6) ❑ ❑ Mass ❑ Yes ❑✓ No
4.23 PCB-1260 Concentration
(11096-82-5) 0 0 Mass 0 Yes ElNo
4.24 PCB-1016 Concentration
(12674-11-2) 0 ❑✓ Mass El Yes 0No
4.25 Toxaphene Concentration
(8001-35-2) 0 0 Mass ❑ Yes ❑✓ No
1 Sampling shall be conducted according to sufficiently sensitive test procedures(i.e., methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I,subchapter N or 0. See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2D(Revised 3-19) Page 17

This page intentionally left blank.

EPA Identification Number Facility Name Outfall Number Form Appr /05/19
OMB No.zu40-0004
NCD 047 368 642 Chemours Fayetteville Works
TABLE E.CERTAIN HAZARDOUS SUBSTANCES AND ASBESTOS(40 CFR 122.21(k)(5)(v))1
Presence or Absence
Pollutant (check one) Available Quantitative Data
Believed Believed Reason Pollutant Believed Present in Discharge (specify units)
Present Absent
❑ Check(V)here if you believe all pollutants listed to be absent from the discharge.You need not complete Table E for the noted outfall unless you have quantitative data available.
1. Asbestos 0 ✓❑
2. Acetaldehyde ❑ ✓❑
3. Allyl alcohol ❑ ✓❑
4. Allyl chloride 0 ❑✓
5. Amyl acetate 0 ❑✓
6. Aniline 0 ❑✓
7. Benzonitrile 0 ❑✓
8. Benzyl chloride 0 ❑✓
9. Butyl acetate 0 ❑✓
10. Butylamine 0 ✓❑
11. Captan 0 ❑✓
12. Carbaryl ✓❑ ❑ May potentially be present in water intake. See Attachment F9.3
13. Carbofuran 0 ❑✓
14. Carbon disulfide 0 ❑✓
15. Chlorpyrifos 0 ❑✓
16. Coumaphos 0 ❑✓
17. Cresol 0 ❑✓
18. Crotonaldehyde 0 ❑✓
EPA Form 3510-2D(Revised 3-19) Page 19

EPA Identification Number Facility Name Outfall Number Form Appn /05/19
OMB No.zu40-0004
NCD 047 368 642 Chemours Fayetteville Works
TABLE E.CERTAIN HAZARDOUS SUBSTANCES AND ASBESTOS(40 CFR 122.21(k)(5)(v))1
Presence or Absence
Pollutant (check one) Reason Pollutant Believed Present in Discharge Available Quantitative Data
Believed Believed (specify units)
Present Absent
19. Cyclohexane ❑ ✓❑
20. 2,4-D(2,4-dichlorophenoxyacetic acid) ✓❑ ❑ May potentially be present in water intake. See Attachment F9.3
21. Diazinon ✓❑ ❑ May potentially be present in water intake. See Attachment F9.3
22. Dicamba ❑✓ ❑ May potentially be present in water intake. See Attachment F9.3
23. Dichlobenil ❑ ❑✓
24. Dichlone ❑ ✓❑
25. 2,2-dichloropropionic acid ❑ ❑✓
26. Dichlorvos ❑ ❑✓
27. Diethyl amine ❑ ❑✓
28. Dimethyl amine ❑ ✓❑
29. Dintrobenzene ❑ ❑✓
30. Diquat 0 ❑✓
31. Disulfoton ❑ ❑✓
32. Diuron El ❑ May potentially be present in water intake. See Attachment F9.3
33. Epichlorohydrin ❑ ❑✓
34. Ethion ❑ ❑✓
35. Ethylene diamine ❑ ❑✓
36. Ethylene dibromide ❑ ❑✓
37. Formaldehyde ❑✓ ❑ Used at Site,may potentially be present.See Attachments F5&F8
EPA Form 3510-2D(Revised 3-19) Page 20

EPA Identification Number Facility Name Outfall Number Form Apprc f05119
OMB No.2040-0004
NCD 047 368 642 Chemours Fayetteville Works
TABLE E.CERTAIN HAZARDOUS SUBSTANCES AND ASBESTOS(40 CFR 122.21(k)(5)(v))1
Presence or Absence
Pollutant (check ones Available Quantitative Data
Believed Believed Reason Pollutant Believed Present in Discharge (specify units)
Present Absent
38. Furfural ❑ ❑✓
39. Guthion ❑ ❑✓
40. Isoprene ❑ ❑✓
41. Isopropanolamine ❑ ✓❑
42. Kelthane 0 ❑✓
43. Kepone ❑ ❑✓
44. Malathion ❑✓ ❑ May potentially be present in water intake. See Attachment F9.3
45. Mercaptodimethur 0 ✓❑
46. Methoxychlor ❑ ❑✓
47. Methyl mercaptan 0 ❑✓
48. Methyl methacrylate ❑✓ ❑ May potentially be present in water intake. See Attachment F9.3
49. Methyl parathion ❑ ❑
50. Mevinphos ❑ ❑✓
51. Mexacarbate 0 ❑✓
52. Monoethyl amine ❑ ❑✓
53. Monomethyl amine ❑ ❑✓
54. Naled ❑ ❑✓
55. Naphthenic acid 0 ❑✓
56. Nitrotoluene ❑ ❑✓
EPA Form 3510-2D(Revised 3-19) Page 21

EPA Identification Number Facility Name Outfall Number Form Appr 1/05/19
OMB No.2040-0004
NCD 047 368 642 Chemours Fayetteville Works
TABLE E.CERTAIN HAZARDOUS SUBSTANCES AND ASBESTOS(40 CFR 122.21(k)(5)(v))1
Presence or Absence
Pollutant (check one) Available Quantitative Data
Believed Believed Reason Pollutant Believed Present in Discharge (specify units)
Present Absent
57. Parathion 0 p
58. Phenolsulfonate 0 ✓❑
59. Phosgene 0 ❑✓
60. Propargite ❑ ❑✓
61. Propylene oxide El ❑✓
62. Pyrethrins ✓❑ ❑ Used at Site,may potentially be present.See Attachment F8
63. Quinoline 0 ❑✓
64. Resorcinol ❑ ❑✓
65. Strontium ❑✓ ❑ May potentially be present in water intake. See Attachment F9.3
66. Strychnine 0 ❑✓
67. Styrene ❑✓ ❑ May potentially be present in water intake. See Attachment F9.3
68. 2,4,5-T(2,4,5-trichlorophenoxyacetic ❑ ❑✓
acid)
69. TDE(tetrachlorodiphenyl ethane) 0 ✓❑
70. 2,4,5-TP[2-(2,4,5-trichlorophenoxy) ❑ ❑✓
propanoic acid]
71. Trichlorofon ❑ ❑✓
72. Triethanolamine ❑ ✓❑
73. Triethylamine ❑✓ ❑ Used at Site,may potentially be present. See attachment F5
74. Trimethylamine ❑ ❑✓
75. Uranium ❑ ❑✓
EPA Form 3510-2D(Revised 3-19) Page 22

EPA Identification Number Facility Name Outfall Number Form Appn 105/19
OMB Nu.Lu+d-0004
NCD 047 368 642 Chemours Fayetteville Works
TABLE E.CERTAIN HAZARDOUS SUBSTANCES AND ASBESTOS(40 CFR 122.21(k)(5)(v))'
Presence or Absence
Pollutant (check one) Available Quantitative Data
Believed Believed Reason Pollutant Believed Present in Discharge (specify units)
Present Absent
76. Vanadium ❑ ✓❑
77. Vinyl acetate ❑ ✓❑
78. Xylene ❑ ❑✓
79. Xylenol ❑ ✓❑
80. Zirconium ✓❑ ❑ Used at Site,may potentially be present. See attachment FS
1 Sampling shall be conducted according to sufficiently sensitive test procedures(i.e., methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I, subchapter N or 0. See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2D(Revised 3-19) Page 23

Attachment J.2 RO Permeate Engineering Report and
Data Analysis

Chemours Company—Fayetteville Works NPDES Permit No.NC0003573
ATTACHMENT J.2
REVERSE OSMOSIS PERMEATE ENGINEERING REPORT AND DATA ANALYSIS
Chemours is treating process wastewater for reuse in manufacturing operations. The
IXM/Monomers Reverse Osmosis (RO) process system consists of a two-pass RO, Granular
Activated Carbon (GAC), and Mixed Bed Ion Exchange (MDI). The system will remove
dissolved per- and polyfluoroalkyl substances (PFAS) compounds and total dissolved solids
(TDS) from the process water currently collected in the Process Effluent Facility (PEF) Storage
Tanks.The goal of the RO system is to produce recycled water that will meet the site specification
limits for demineralized water for use in the various production units in the Chemours Monomers
and Ion Exchange Membrane Area(IXM). Recycled water that meets all of the specifications with
the exception of total organic carbon (TOC) can be reused in all operations of the Thermal
Oxidizer. Treated water that does not meet these specifications is proposed to be discharged to the
wastewater treatment plant.
Process Water Components
IXM/Monomers process water is collected in the Chemours Alkaline Waste Tank and Waste Acid
Tank. These waters are neutralized by combining the two streams and adding additional 93%
Sulfuric Acid as necessary. This neutralized stream is mixed with several area sumps in the
Common Waste Tank before being pumped to the PEF Tanks. In addition the TO waters can also
be directed to the PEF tanks for treatment and reuse. Table 1 provides a list of chemicals that may
be present in the influent to the RO system.
Table 1. Chemicals that may be Present in the Reverse Osmosis System Influent
Chemical Concentration
Water 75 - 100%
Potassium Carbonate 0-20%
Potassium Hydroxide 0- 5%
Sodium Sulfate 0-4%
Potassium Fluoride 0—3%
Sodium Hydroxide 0—3%
Sodium Bisulfate 0-2%
Sodium Chloride 0-2%
Potassium Hydrogen Sulfate 0-2.5%
Sodium Fluoride 0- 1%
Sodium Carbonate 0- 1%
Potassium Nitrate 0- 1%
Sodium Hypochlorite 0- 1%
PFAS Compounds 0 -2%
Aluminum Hydroxide 0—0.55%
Calcium Fluoride 0—0.2%
1 November 2020

Chemours Company—Fayetteville Works NPDES Permit No.NC0003573
Chemical Concentration
Hydrogen Peroxide 0—0.2%
Potassium Acetate 0-0.2%
Sodium Acetate 0-0.2%
Diethylene glycol 0—0.1%
Dimethyl Sulfoxide 0-0.1%
Methanol 0-0.1%
Ethanol 0-0.015%
Acetonitrile 0-0.015%
Diglyme 0- 0.015%
Methylene Chloride 0- 0.015%
Toluene 0- 0.015%
RO System
The RO system is depicted in Figure 1. The Feed Tank will receive process water from a PEF Tank
at an approximate average rate of 28,000 gallons per day. A feed pump and a control valve are
used to maintain a constant level in the Feed Tank. The wastewater in the Feed Tank is fed to the
first-pass RO, which is a Seawater Reverse Osmosis (SWRO) Unit. Associated equipment with
the SWRO Units are one micron bag filters, filter skids, and an anti-scalant addition point used to
reduce fouling of the ROs. There are also cartridge filters upstream of the first SWRO Unit and its
booster pump. Water passing through the SWROs (permeate) will be collected in the Break Tank
for feed to the second-pass RO, which is a Brackish Water RO (BWRO)Unit.
Some of the SWRO reject water with concentrated levels of PFAS and TDS, which did not pass
through the ROs, will be sent back to the Feed Tank (further concentrating the feed tank). The
remaining SWRO concentrate (reject water) will be send to the Chemours PEF Tank #4 for off-
site disposal, as bleed flow to remove concentrated PFAS and TDS from the mass balance. The
flow rate of the bleed flow will be adjusted depending on its TDS content.
Permeate from the BWRO Units will be fed to two carbon bed skids(GAC)followed by the SUEZ
Frac and then to the mixed bed system (MDI). Concentrate from the second RO will be recycled
back to the Feed Tank.
The RO system uses an online conductivity meter to monitor the quality of the treated water and
will have the ability to recycle it back to the FRAC tank, if needed. Chemours measures pH,
conductivity, chloride, fluoride, and total organic carbon with online analysis as the Chemours'
HOLD Tanks are filling.
Chemours will collect composite samples of the treated water. These samples are analyzed on-site
for calcium, magnesium, sodium, potassium, pH, and conductivity.
2 November 2020

Chemours Company—Fayetteville Works NPDES Permit No.NC0003573
Decision Tree for Disposition of Treated Water and First-Pass RO Concentrate Bleed Flow
As discussed previously,the goal of the RO system is to produce recycled water that will meet the
site specification limits for demineralized water. These limits are presented in Table 2. The
decision tree used to determine the disposition of the treated water is as follows:
1. If all the specifications stated below are met, then the treated water can be recycled
internally to the Chemours process units. Blending with Powerhouse-supplied
demineralized water can also be used to meet specifications.
2. If all the specifications stated below are met with the exception of TOC, then the treated
water may be sent to the Thermal Oxidizer for use in all operations in the Thermal Oxidizer.
The treated water will need to be within the TOC specification which is being developed
for the Thermal Oxidizer.
3. If all the specifications stated below are not met,including TOC,then the treated water will
be sent to the wastewater treatment plant for treatment prior to discharge as provided in the
site's NPDES permit.
Table 2. Site Specification Limits for Demineralized Water
Maximum Minimum
Analysis Limit Limit Units
Calcium + Magnesium 0.02 ppm
Sodium 10 ppm
Potassium 10 ppm
Chloride 0.5 ppm
Fluoride 0.25 ppm
pH 7.5 5.5
Conductivity—lab 0.9 uS/cm
Total Organic Carbon* 20 ppm
* Chemours is currently developing a secondary TOC maximum
limit for use of the RO Unit treated water in the Thermal Oxidizer.
In all cases, the first-pass concentrate bleed flow from the SWRO unit will be send to PEF Tank
#4 to be disposed off-site.
Note: Water Treatment Chemicals SDS Sheets used in the RO system are attached.
3 November 2020

Chemours Company-Fayetteville Works NPDES Permit No.NC0003573
DATA ANALYSIS
The data analysis presents information on influent data, effluent data, performance, and loading
for the Reverse Osmosis Unit based on a pilot testing program and samples collected during
production. Analyses for R-EVE, HPSDA (Byproduct 5) and RPSDA (Byproduct 4) have been
removed from the data set due to Table 3+ method interferences and the resulting unreliability of
the results (see Attachments F 12).
Influent Data Set
The influent data set presented are data from the 5 gallons per minute(gpm)Reverse Osmosis pilot
testing program executed April 30 - June 19, 2019. These analyses represent the most
comprehensive data set for the PEF Feed Tanks and includes 20 samples from the time period. All
samples were grab samples and collected in new clean bottles. Proper care was exercised by
operators to prevent sample contamination.
Samples were collected and analyzed by Chemours using a LC/MS/MS Triple Quad analysis with
a higher detection limit than is currently available through commercial test labs (such as Test
America). The higher detection limit was not an issue since this material was feed material and
contained easily measurable amounts of the Table 3+compounds.
Results of the analyses for the Feed Tank samples are summarized in Table 3.
Table 3: Influent Data for the Reverse Osmosis Pilot Study,April 30 to June 19,2019
Table 3+
Number Detection
of Average Maximum Minimum Limits
Compound Samples (ppb) (ppb) (ppb) (ppb)
HFPO-DA 20 3,503.6 10.510.6 72.335 0.002
PFMOAA 20 852.1 5,886.6 0.399 0.002
PMPA 20 69.4 749.0 0.390 0.02
PF02HxA 20 808.8 5,809.8 42.954 0.002
PFO3OA 20 223.0 1,523.6 12.272 0.002
PFO4DA 20 45.9 221.5 1.799 0.002
PF05DA 20 9.8 22.1 0.210 0.002
Byproduct) 20 1,083.7 2,055.7 13.391 0.002
Byproduct2 20 223.8 524.0 3.254 0.002
NVHOS 20 138.9 291.2 2.443 0.002
PEPA 20 133.0 854.7 4.096 0.01
EVE Acid 20 85.3 198.2 0.900 0.002
Hyrdo Eve 20 36.0 66.4 0.448 0.002
Byproduct6 20 20.6 75.4 0.440 0.002
PES 20 0.887 3.000 0.002 0.002
PFECA G 20 0.090 0.263 0.007 0.002
4 November 2020

Chemours Company-Fayetteville Works NPDES Permit No.NC0003573
Effluent Data Set
The effluent data set presented are sample analyses from the 50 gpm production Reverse Osmosis
unit collected July 1 - September 28, 2020. A total of 74 samples have been analyzed by Test
America using the low detection limit method of the Table 3+technique. The samples presented
are grab samples collected as material is recirculated through a"DI Trailer" (DI is deionization or
demineralization)to attain low conductivity water equivalent to demineralized quality water. This
represents the final treatment of the RO water.
Results of the analyses for the DI Trailer effluent samples are summarized in Table 4. Effluent
concentrations for 11 of the 16 PFAS compounds were non-detectable.
Table 4: Effluent Data for the Reverse Osmosis Unit,July 1 to September 28,2020
Percent Table 3+
Number Detectable Detection
of Detectable Samples Average Maximum Minimum Limits
Compound Samples Samples (%) (ppb) (ppb) (ppb) (ppb)
HFPO-DA 74 12 16.22% 0.0032 0.0350 0.0020 0.002
PFMOAA 74 3 4.05% 0.0022 0.0130 0.0020 0.002
PMPA 74 0 0% 0.02 0.02 0.02 0.02
PFO2HxA 74 0 0% 0.002 0.002 0.002 0.002
PFO3OA 74 0 0% 0.002 0.002 _ 0.002 0.002
PFO4DA 74 0 0% 0.002 0.002 0.002 0.002
PFO5DA 74 0 0% 0.002 0.002 0.002 0.002
Byproductl 74 9 12.16% 0.0024 0.013 0.002 0.002
Byproduct2 74 1 1.35% '. 0.002 0.002 0.002 0.002
NVHOS 74 0 0% 0.002 0.002 0.002 0.002
PEPA 74 0 0% 0.01 0.01 ' 0.01 0.01
EVE Acid 74 1 1.35% 0.002 0.0022 0.002 0.002
Hyrdo Eve 74 0 0% 0.002 0.002 0.002 1 0.002
Byproduct6 74 0 0% 0.002 0.002 0.002 0.002
PES 74 0 0% 0.002 0.002 0.002 0.002
PFECA G 74 0 0% 0.002 0.002 0.002 0.002
Discussion and Data Analysis of the Data Set
The pilot Feed Tank (Influent) data set from 2019 is the most statistically comprehensive data set
available. The emphasis once the 50 gpm unit was installed was on the effluent concentration so
feed concentrations were only measured occasionally. There are insufficient samples from the full
scale RO system to consider the data statistically significant. The 2019 data set spans a long
enough period to represent multiple operations at the Fayetteville site and can be considered
representative of the feed compositions through the course of a year.
5 November 2020

Chemours Company-Fayetteville Works NPDES Permit No.NC0003573
PFECA_B has never been found in the Fayetteville feed or effluent and has also been removed
from the data set. PFECA_G has been observed in occasional samples,but it is rare and therefore
highly suspect. The route to make it is would be from a byproduct in the process and then multiple
reaction steps to produce PFECA_G. Regardless, it has been retained in the data set.
Tables 3 and 4 contain the reduced data and statistics for the data set. All raw data can be made
available on request.
To evaluate the performance of the RO Unit, a benchmark removal (specified performance) of
99% removal of individual compounds was selected. This benchmark was used to calculate the
anticipated effluent concentrations(average,maximum,and minimum)for each PFAS compound
if the removal performance was achieved. If the anticipated effluent concentration was less than
the detection limit,the value was set to the detection limit.Table 5 provides the anticipated effluent
concentrations at a 99%removal rate. Values in gray shading indicate that the detection limit was
used rather than the 99% removal rate calculation.
To compare the actual performance rate, the measured effluent concentrations (average,
maximum, and minimum) were divided by the anticipated effluent concentrations. Results are
shown in Table 5 with the measured effluent characteristics in Table 4. Cells highlighted in green
show the effluent characteristics where the measured characteristic was less than 1% of the
specified performance value. For these PFAS compounds, removal was significant, particularly
for the average and maximum effluent characteristics. Cells highlighted in yellow show the
effluent characteristics where the measured characteristic was greater than 1%and less than 100%
of the specified performance value.Values of 100%mean that the measured characteristic is at the
detection limit and the specified performance is at or less than the detection limit.
Table 5: Estimated Performance for the Reverse Osmosis Unit
Performance Benchmark at 99%
Removal of Influent Percent of Effluent Characteristic
Concentration to Benchmark
Average Maximum Minimum Average Maximum Minimum
Compound (ppb) (ppb) (ppb) % (% (%)
HFPO-DA 35.036 105.106 0.723 t.t't 0.0 % 0.276°
PFMOAA 8.521 58.866 0.004 0.026% 0.022% 50.125%
PMPA 0.694 7.490 0.020 2.882% 0.267% 100%
PFO2HxA 8.088 58.098 0.430 0.025% 0.003% 0.465%
PFO3OA 2.230 15.236 0.123 0.090% 0.013% 1.626%
PFO4DA 0.459 2.215 0.018 0.436% 0.090% 11.111%
PFO5DA 0.098 0.221 0.002 2.041% 0.905% 100%
Byproduct] 10.837 20.557 0.134 0.022% 0.063% 1.493%
Byproduct2 2.238 5.240 0.033 0.089% 0.038% 6.061%
NVHOS 1.389 2.912 0.024 0.144% 0.069% 8.333%
PEPA 1.330 8.547 0.041 0.752% 0.117% 24.390%
EVE Acid 0.853 I 1.982 0.009 0.234% 0.111% 22.222%
6 November 2020

Chemours Company-Fayetteville Works NPDES Permit No.NC0003573
Performance Benchmark at 99%
Removal of Influent Percent of Effluent Characteristic
Concentration to Benchmark
Hyrdo Eve 0.360 0.664 0.004 Ili 556% 0.301% 50.000%
Byproduct6 0.206 I 0.754 0.004 0.971% 0.265% 50.000%
PES 0.009 0.030 0.002 22.222% 6.667% 100%
PFECA G 0.002 0.003 0.002I 100% 66.667% 100%
Table 6 provides the estimated average, maximum and minimum daily load leaving the RO Unit
using a flow rate of 28,000 gpd (-19.44 gpm) and the effluent concentrations in Table 4. For
concentrations less than the detection limit,the calculated daily load assumes the concentration of
each of the species is equal to the detection limit,thus making the calculation conservative.
Table 6: Estimated Range in Daily Load from the Reverse Osmosis Unit
Average Maximum Minimum
_Compound (lbs/d) (lbs/d) (lbs/dy_-_
HFPO-DA 7.48E-07 8.18E-06 4.67E-07
PFMOAA i5.14E-07 3.04E-06 4.67E-07
PMPA 4.67E-06 4.67E-06 4.67E-06
PFO2HxA 4.67E-07 4.67E-07 4.67E-07
PFO3OA 4.67E-07 4.67E-07 4.67E-07
PFO4DA 4.67E-07 4.67E-07 4.67E-07
PFO5DA 4.67E-07 4.67E-07 4.67E-07
Byproduct 1 5.61E-07 3.04E-06 4.67E-07
yproduct2 4.67E-07 4.67E-07 4.67E-07
NVHOS 4.67E-07 4.67E-07 4.67E-07
PEPA 2.34E-06 2.34E-06 2.34E-06
.. _._ ._......... _..
EVE Acid 4.67E-07 5.14E-07 4.67E-07
Hyrdo Eve 4.67E-07 4.67E-07 4.67E-07
Byproduct6 4.67E-07 4.67E-07 4.67E-07
PES 4.67E-07 4.67E-07 4.67E-07
PFECA G 4.67E-07 4.67E-07 4.67E-07
Total PFAS Load 6.40E-06 1.64E-05 ; 6.08E-06
7 November 2020

iir pH
Conductivity
Chloride
1"-), Fluoride
SUEZ EQUIPMENT TOC
PEF 1 r
SUEZ
i FEED BREAK FRAClir i
i TANK TANK COMP
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--C ?-� r WWTP
X o ' HOLD TK 1
PEF 2 r, X A COMP
SAMP it_
lir t>44--
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PEF 3
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PEF 4

Attachment J.2. 1 RO Permeate Engineering Report -
Safety Data Sheets

CENTAUR NDS 12X40
Safety Data Sheet
CalgonCarbon°
Issued:04/20/2015
Supersedes:12/30/2011
Version:1.0
SECTION 1: Identification of the Substance/Mixture and of the Company/Undertaking
1.1. Product identifier
Product name : CENTAUR NDS 12X40
Product form : Substance
CAS No : 7440-44-0
Product code : 11650
Synonyms : Activated Carbon
1.2. Relevant identified uses of the substance or mixture and uses advised against
Use of the substance/mixture : Adsorbent
1.3. Details of the supplier of the safety data sheet
Calgon Carbon Corporation
P.O.Box 717
Pittsburgh,PA 15230
412-787-6700
1.4. Emergency telephone number
Emergency number : CHEMTREC(24 HRS):1-800-424-9300
SECTION 2: Hazards Identification
2.1. Classification of the substance or mixture
GHS-US classification
Combustible Dust
Not classified as a simple asphyxiant. Product does not displace oxygen in the ambient atmosphere,but slowly adsorbs oxygen from a confined
space when wet. Under conditions of anticipated and recommended use,product does not pose an asphyxiation hazard.
2.2. Label elements
GHS-US labeling
Signal word(GHS-US) : Warning
Hazard statements(GHS-US) : May form combustible dust concentrations in air
2.3. Other hazards
Other hazards not contributing to the : Wet activated carbon can deplete oxygen from air in enclosed spaces.If use in an enclosed
classification space is required,procedures for work in an oxygen deficient environment should be followed.
2.4. Unknown acute toxicity(GHS-US)
No data available
SECTION 3: Composition/Information on Ingredients
3.1. Substance
Name Product identifier
Activated Carbon (CAS No)7440-44-0 <100
3.2. Mixture
Not applicable
SECTION 4: First Aid Measures
4.1. Description of first aid measures
First-aid measures general : If exposed or concerned,get medical attention/advice.Show this safety data sheet to the
doctor in attendance.Wash contaminated clothing before re-use.Never give anything to an
unconscious person.
First-aid measures after inhalation : IF INHALED:Remove to fresh air and keep at rest in a comfortable position for breathing.
First-aid measures after skin contact : IF ON SKIN(or clothing):Remove affected clothing and wash all exposed skin with water for at
least 15 minutes.
First-aid measures after eye contact : IF IN EYES:Immediately flush with plenty of water for at least 15 minutes.Remove contact
lenses if present and easy to do so.Continue rinsing.
04/20/2015 CENTAUR NDS 12X40 For Internal Use Only:PR#1 Page 1 of 7
Product Code:11650

CENTAUR NDS 12X40
Product Code: 11650
Safety Data Sheet
First-aid measures after ingestion : IF SWALLOWED:Rinse mouth thoroughly.Do not induce vomiting without advice from poison
control center or medical professional.Get medical attention if you feel unwell.
4.2. Most important symptoms and effects,both acute and delayed
Symptoms/injuries : Not expected to present a significant hazard under anticipated conditions of normal use.
However,dust may cause irritation and redness of the eyes,irritation of the skin and respiratory
system.The effects of long-term,low-level exposures to this product have not been
determined.
4.3. Indication of any immediate medical attention and special treatment needed
No additional information available
SECTION 5: Firefighting Measures
5.1. Extinguishing media
Suitable extinguishing media : Water spray.Carbon dioxide.Dry chemical.Foam.Sand.
Unsuitable extinguishing media : None known.
5.2. Special hazards arising from the substance or mixture
Fire hazard : Dust may be combustible under specific conditions.May be ignited by heat,sparks or flames.
Explosion hazard : Dust may form explosive mixture in air.
Reactivity : No dangerous reactions known under normal conditions of use.Carbon oxides may be emitted
upon combustion of material.
5.3. Advice for firefighters
Firefighting instructions : Wear NIOSH-approved self-contained breathing apparatus suitable for the surrounding fire.
Use water spray or fog for cooling exposed containers.Evacuate area.
SECTION 6: Accidental Release Measures
6.1. Personal precautions,protective equipment and emergency procedures
General measures : Evacuate area.Keep upwind.Ventilate area.Spill should be handled by trained clean-up crews
properly equipped with respiratory equipment and full chemical protective gear(see Section 8).
6.1.1. For non-emergency personnel
No additional information available
6.1.2. For emergency responders
No additional information available
6.2. Environmental precautions
Prevent entry to sewers and public waters.Avoid release to the environment.Product is not soluble,but can cause particulate emission of
discharged into waterways.Dike all entrances to sewers and drains to avoid introducing material to waterways.Notify authorities if product enters
sewers or public waters.
6.3. Methods and material for containment and cleaning up
For containment : Sweep or shovel spills into appropriate container for disposal.Minimize generation of dust.
Methods for cleaning up : Sweep or shovel spills into appropriate container for disposal.Minimize generation of dust.
Dispose of material in compliance with local,state,and federal regulations.
6.4. Reference to other sections
No additional information available
SECTION 7: Handling and Storage
7.1. Precautions for safe handling
Precautions for safe handling : Avoid dust formation.Avoid contact with skin,eyes and clothing.Do not handle until all safety
precautions have been read and understood.Wash hands and other exposed areas with mild
soap and water before eating,drinking or smoking and when leaving work.Keep away from
sources of ignition-No smoking.
7.2. Conditions for safe storage,including any incompatibilities
Storage conditions : Keep container tightly closed in a cool,dry,and well-ventilated place.Keep away from ignition
sources.
SECTION 8: Exposure Controls/Personal Protection
8.1. Control parameters
Activated Carbon(7440-44-0)*
OSHA PEL(TWA)(mg/m3) <_5(Respirable Fraction)
s 15(Total Dust)
04/20/2015 CENTAUR NDS 12X40 For Internal Use Only:PR#1 2/7
Product Code:11650

CENTAUR NDS 12X40
Product Code: 11650
Safety Data Sheet
Exposure limits are for inert or nuissance dust. No specific exposure limits have been established for this activated carbon product by OSHA or ACGIH.
8.2. Exposure controls
Appropriate engineering controls : Provide adequate general and local exhaust ventilation.Use process enclosures,local exhaust
ventilation,or other engineering controls to control airborne levels below recommended
exposure limits.Use explosion-proof equipment with flammable materials.Ensure adequate
ventilation,especially in confined areas.Wet activated carbon can deplete oxygen from air in
enclosed spaces.If use in an enclosed space is required,procedures for work in an oxygen
deficient environment should be followed.
Personal protective equipment : Gloves.Safety glasses.Insufficient ventilation:wear respiratory protection.
0
r1/4(1#
Hand protection : Gloves should be classified under Standard EN 374 or ASTM F1296.Suggested glove
materials are: Neoprene,Nitrile/butadiene rubber,Polyethylene,Ethyl vinyl alcohol laminate,
PVC or vinyl.Suitable gloves for this specific application can be recommended by the glove
supplier.
Eye protection : Use eye protection suitable to the environment.Avoid direct contact with eyes.
Skin and body protection : Wear long sleeves,and chemically impervious PPE/coveralls to minimize bodily exposure.
Respiratory protection : Use NIOSH-approved dust/particulate respirator.Where vapor,mist,or dust exceed PELs or
other applicable OELs,use NIOSH-approved respiratory protective equipment.
SECTION 9: Physical and Chemical Properties
9.1. Information on basic physical and chemical properties
Physical state : Solid
Appearance : Granular,powder,or pelletized substance
Color : Black
Odor : Odorless
Odor threshold : No data available
pH : No data available
Relative evaporation rate(butylacetate=1) : Not applicable
Melting point : Not applicable
Freezing point : Not applicable
Boiling point : Not applicable
Flash point : No data available
Auto-ignition temperature : >220°C
Decomposition temperature : No data available
Flammability(solid,gas) : >220°C
Vapor pressure : Not applicable
Relative vapor density at 20°C : Not applicable
Apparent density : 0.4-0.7 g/cc
Solubility : Insoluble.
Log Pow : Not applicable
Log Kow : Not applicable
Viscosity,kinematic : Not applicable
Viscosity,dynamic : Not applicable
Explosive properties : No data available
Oxidising properties : No data available
Explosive limits : No data available
9.2. Other information
No additional information available
SECTION 10: Stability and Reactivity
10.1. Reactivity
No dangerous reactions known under normal conditions of use.
10.2. Chemical stability
Stable under use and storage conditions as recommended in section 7.
04/20/2015 CENTAUR NDS 12X40 For Internal Use Only:PR#1 3/7
Product Code:11650

CENTAUR NDS 12X40
Product Code: 11650
Safety Data Sheet
10.3. Possibility of hazardous reactions
None known.
10.4. Conditions to avoid
Avoid dust formation.Heat.Ignition sources.Exposure to high concentrations of organic compounds may cause bed temperature to rise.
10.5. Incompatible materials
Alkali metals.Strong oxidizing agents.
10.6. Hazardous decomposition products
Carbon monoxide(CO),carbon dioxide(CO2).
SECTION 11: Toxicological Information
11.1. Information on toxicological effects
Acute toxicity : Not classified
Activated Carbon(7440-44-0)
LD50 oral rat >2000 mg/kg
Skin corrosion/irritation : Not classified
Serious eye damage/irritation : Not classified
Respiratory or skin sensitisation : Not classified
Germ cell mutagenicity : Not classified
Carcinogenicity : Not classified
Silica:Crystalline,quartz(14808-60-7)
IARC group 1 -Carcinogenic to humans
The International Agency for Research on Cancer(IARC)has classified "silica dust,crystalline,in the form of quartz or cristobalite"as
carcinogenic to humans(group 1).However these warnings refer to crystalline silica dusts and do not apply to solid activated carbon containing
crystalline silica as a naturally occuring,bound impurity.As such,we have not classified this product as a carcinogen in accordance with the US
OSHA Hazard Communication Standard(29 CFR§1910.1200)but recommmend that users avoid inhalation of product in a dust form.
Reproductive toxicity : Not classified
Specific target organ toxicity(single exposure) : Not classified
Specific target organ toxicity(repeated : Not classified
exposure)
Aspiration hazard : Not classified
Symptoms/injuries : Not expected to present a significant hazard under anticipated conditions of normal use.
However,dust may cause irritation and redness of the eyes,irritation of the skin and respiratory
system.The effects of long-term,low-level exposures to this product have not been
determined.
SECTION 12: Ecological Information
12.1. Toxicity
No additional information available
12.2. Persistence and degradability
No additional information available
12.3. Bioaccumulative potential
No additional information available
12.4. Mobility in soil
No additional information available
12.5. Other adverse effects
No additional information available
04/20/2015 CENTAUR NDS 12X40 For Internal Use Only:PR#1 4f7
Product Code:11650

CENTAUR NDS 12X40
Product Code: 11650
Safety Data Sheet
SECTION 13: Disposal Considerations
13.1. Waste treatment methods
Waste treatment and disposal methods : Vacuum or shovel material into a closed container.Dispose in a safe manner in accordance
with local/national regulations.Do not allow the product to be released into the environment.
Subject to Calgon Carbon technical approval,non-powdered activated carbons may be
reactivated to allow recycle and reuse.
Additional information : Activated carbon is an adsorbent media;hazard classification is generally determined by the
adsorbate.Consult U.S.EPA guidelines listed in 40 CFR 261.3 for more information on
hazardous waste disposal.
SECTION 14: Transport Information
14.1.In accordance with DOT
Not classified as hazardous for domestic land transport
UN-No.(DOT) : None on finished product
DOT NA no. : None on finished product
Proper Shipping Name(DOT) : Not regulated
Department of Transportation(DOT)Hazard : None on finished product
Classes
Hazard labels(DOT) : None on finished product
Packing group(DOT) : None on finished product
DOT Quantity Limitations Passenger aircraft/rail : None on finished product
(49 CFR 173.27)
14.2.Transport by sea
Not classified as hazardous for water transport
IMO/IMDG
UN/NA Identification Number :None on finished product
UN-Proper Shipping Name :Not regulated
Transport Hazard Class :None on finished product
14.3.Air transport
Not classified as hazardous for air transport
ICAO/IATA
UN/NA No :None on finished product
UN-Proper Shipping Name :Not regulated
Transport Hazard Class :None on finished product
Packing Group :None on finished product
Marine Pollutant :None on finished product
14.4.Additional information
Other information : Under the UN classification for activated carbon,all activated carbons have been identified as a
class 4.2 product. However,this product type or an equivalent has been tested according to
the United Nations Transport of Dangerous Goods test protocol for a"self-heating substance"
(United Nations Transportation of Dangerous Goods,Manual of Tests and Criteria,Part Ill,
Section 33.3.1.6-Test N.4-Test Method for Self Heating Substances)and it has been
specifically determined that this product type or an equivalent does not meet the definition of a
self-heating substance(class 4.2)or any other hazard class,and therefore should not be listed
as a DOT hazardous material.
SECTION 15: Regulatory Information
15.1.US Federal regulations
CENTAUR NDS 12X40
All chemical substances in this product are listed in the EPA(Environment Protection Agency)TSCA(Toxic Substances Control Act)Inventory
or are exempt
Cobalt(7440-48-4)
Listed on the United States TSCA(Toxic Substances Control Act)inventory
Listed on United States SARA Section 313
SARA Section 313-Emission Reporting 0.1
04/20/2015 CENTAUR NDS 12X40 For Internal Use Only:PR#1 5f7
Product Code:11650

CENTAUR NDS 12X40
Product Code: 11650
Safety Data Sheet
15.2.International regulations
No additional information available
15.3.US State regulations
California Proposition 65
WARNING:This product contains,or may contain,trace quantities of a substance(s)known to the state of California to cause cancer,birth defects,
or other reproductive harm.
Silica:Crystalline,quartz(14808-60-7)
U.S.-California- U.S.-California- U.S.-California- U.S.-California- No significance risk level
Proposition 65- Proposition 65- Proposition 65- Proposition 65- (NSRL)
Carcinogens List Developmental Toxicity Reproductive Toxicity- Reproductive Toxicity-
Female Male
Yes No No No NA
Cobalt(7440-48-4)
U.S.-California- U.S.-California- U.S.-California- U.S.-California- No significance risk level
Proposition 65- Proposition 65- Proposition 65- Proposition 65- (NSRL)
Carcinogens List Developmental Toxicity Reproductive Toxicity- Reproductive Toxicity-
Female Male
Yes No No No NA
Titanium dioxide(13463-67-7)
U.S.-California- U.S.-California- U.S.-California- U.S.-California- No significance risk level
Proposition 65- Proposition 65- Proposition 65- Proposition 65- (NSRL)
Carcinogens List Developmental Toxicity Reproductive Toxicity- Reproductive Toxicity-
Female Male
Yes No No No NA
Aluminum oxide(1344-28-1)
U.S.-New Jersey-Right to Know Hazardous Substance List
U.S.-Massachusetts-Right to Know List
U.S.-Pennsylvania-RTK(Right to Know)-Environmental Hazard List
Calcium sulfate(7778-18-9)
U.S.-Massachusetts-Right to Know List
U.S.-New Jersey-Right to Know Hazardous Substance List
U.S.-Pennsylvania-RTK(Right to Know) List
Silica:Crystalline,quartz(14808-60-7)
U.S.-New Jersey-Right to Know Hazardous Substance List
U.S.-Pennsylvania-RTK(Right to Know)List
U.S.-Massachusetts-Right to Know List
SECTION 16: Other Information
Indication of changes Revision 1.0:New SDS Created.
Revision Date 04/20/2015
Other information Author:CJS.
For internal use only PR#1
Prepared according to Federal Register/Vol.77,No.58/Monday,March 26,2012/Rules and Regulations
NFPA health hazard : 0-Exposure under fire conditions would offer no hazard
beyond that of ordinary combustible materials.
NFPA fire hazard : 1 -Must be preheated before ignition can occur.
NFPA reactivity : 0-Normally stable,even under fire exposure conditions, Q
and are not reactive with water.
............
04/20/2015 CENTAUR NDS 12X40 For Internal Use Only:PR#1 6/7
Product Code:11650

CENTAUR NDS 12X40
Product Code: 11650
Safety Data Sheet
HMIS III Rating
Health : 0
Flammability : 1
Physical : 0
Personal Protection
This information is based on our current knowledge and is intended to describe the product for the purposes of health, safety and environmental
requirements only. It should not therefore be construed as guaranteeing any specific property of the product. The information is this document
applies to this specific material as supplied.It may not be valid if product is used in combination with other materials.It is the user's responsibility to
determine the suitability and completeness of this information for their particular use.While the information and recommendations set forth herein
are believed to be accurate as of the date hereof,Calgon Carbon Corporation makes no warranty with respect to the same,and disclaims all liability
for reliance thereon.
04/20/2015 CENTAUR NDS 12X40 For Internal Use Only:PR#1 7/7
Product Code:11650

Dow SAFETY DATA SHEET
THE DOW CHEMICAL COMPANY
Product name: DOWEXTM MARATHON TM A OH Anion Exchange Issue Date: 04/07/2015
Resin
Print Date: 06/16/2016
THE DOW CHEMICAL COMPANY encourages and expects you to read and understand the entire
(M)SDS, as there is important information throughout the document. We expect you to follow the
precautions identified in this document unless your use conditions would necessitate other appropriate
methods or actions.
1. IDENTIFICATION
Product name: DOWEXTM MARATHON M A OH Anion Exchange Resin
Recommended use of the chemical and restrictions on use
Identified uses: Ion exchange and/or Adsorption process
COMPANY IDENTIFICATION
THE DOW CHEMICAL COMPANY
2030 WILLARD H DOW CENTER
MIDLAND MI 48674-0000
UNITED STATES
Customer Information Number: 800-258-2436
[e-mail]
EMERGENCY TELEPHONE NUMBER
24-Hour Emergency Contact: CHEMTREC+1 800-424-9300
Local Emergency Contact: 800-424-9300
2. HAZARDS IDENTIFICATION
Hazard classification
This material is hazardous under the criteria of the Federal OSHA Hazard Communication Standard
29CFR 1910.1200.
Serious eye damage -Category 1
Label elements
Hazard pictograms
® TM Trademark of The Dow Chemical Company("Dow")or an affiliated Page 1 of 9
company of Dow

Product name: DOWEXTM MARATHON TM A OH Anion Exchange Issue Date: 04/07/2015
Resin
Signal word: DANGER!
Hazards
Causes serious eye damage.
Precautionary statements
Prevention
Wear eye protection/face protection.
Response
IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if
present and easy to do. Continue rinsing. Immediately call a POISON CENTER or doctor/
physician.
Other hazards
no data available
3. COMPOSITION/INFORMATION ON INGREDIENTS
This product is a mixture.
Component CASRN Concentration
Trimethylamine functionalised copolymer of 6901 1-1 8-3 >= 25.0-<= 50.0
styrene and divinylbenzene in the hydroxide
form
Water 7732-18-5 >= 50.0 -<= 75.0 %
4. FIRST AID MEASURES
Description of first aid measures
General advice: First Aid responders should pay attention to self-protection and use the
recommended protective clothing (chemical resistant gloves, splash protection). If potential for
exposure exists refer to Section 8 for specific personal protective equipment.
Inhalation: Move person to fresh air; if effects occur, consult a physician.
Skin contact: Wash off with plenty of water.
Eye contact: Wash immediately and continuously with flowing water for at least 30 minutes. Remove
contact lenses after the first 5 minutes and continue washing. Obtain prompt medical consultation,
preferably from an ophthalmologist. Suitable emergency eye wash facility should be immediately
available.
Ingestion: No emergency medical treatment necessary.
Page 2 of 9

Product name: DOWEXTM MARATHON I" A OH Anion Exchange Issue Date: 04/07/2015
Resin
Most important symptoms and effects, both acute and delayed: Aside from the information found
under Description of first aid measures (above)and Indication of immediate medical attention and
special treatment needed (below), any additional important symptoms and effects are described in
Section 11: Toxicology Information.
Indication of any immediate medical attention and special treatment needed
Notes to physician: Chemical eye burns may require extended irrigation. Obtain prompt
consultation, preferably from an ophthalmologist. No specific antidote. Treatment of exposure should
be directed at the control of symptoms and the clinical condition of the patient.
5. FIREFIGHTING MEASURES
Suitable extinguishing media: Water. Dry chemical fire extinguishers. Carbon dioxide fire
extinguishers.
Unsuitable extinguishing media: no data available
Special hazards arising from the substance or mixture
Hazardous combustion products: Under fire conditions some components of this product may
decompose. The smoke may contain unidentified toxic and/or irritating compounds. Combustion
products may include and are not limited to: Organic amines. Nitrogen oxides. Hydrocarbons.
Carbon monoxide. Carbon dioxide. Benzene compounds.
Unusual Fire and Explosion Hazards: This material will not burn until the water has evaporated.
Residue can burn.
Advice for firefighters
Fire Fighting Procedures: Keep people away. Isolate fire and deny unnecessary entry. Soak
thoroughly with water to cool and prevent re-ignition. Cool surroundings with water to localize fire
zone.
Special protective equipment for firefighters: Wear positive-pressure self-contained breathing
apparatus(SCBA)and protective fire fighting clothing (includes fire fighting helmet, coat, trousers,
boots, and gloves). If protective equipment is not available or not used,fight fire from a protected
location or safe distance.
6. ACCIDENTAL RELEASE MEASURES
Personal precautions, protective equipment and emergency procedures: Evacuate area. Only
trained and properly protected personnel must be involved in clean-up operations. Spilled material
may cause a slipping hazard. Keep upwind of spill. Ventilate area of leak or spill. Refer to section 7,
Handling, for additional precautionary measures. Use appropriate safety equipment. For additional
information, refer to Section 8, Exposure Controls and Personal Protection.
Environmental precautions: Prevent from entering into soil, ditches, sewers, waterways and/or
groundwater. See Section 12, Ecological Information.
Methods and materials for containment and cleaning up: Contain spilled material if possible.
Sweep up. Recover spilled material if possible. Collect in suitable and properly labeled containers.
See Section 13, Disposal Considerations, for additional information.
Page 3 of 9

Product name: DOWEXTM MARATHONTM A OH Anion Exchange Issue Date: 04/07/2015
Resin
7. HANDLING AND STORAGE
Precautions for safe handling: Do not get in eyes. Wash thoroughly after handling. Keep container
closed. Use with adequate ventilation. Static electricity can accumulate on dry beads. Leave room
for expansion as dry resin swells upon wetting and/or changing ionic form. Equipment construction
material should be compatible with feed, regenerant, ionic form and effluent of the ion exchange
process. Avoid generating and breathing dust. Good housekeeping and controlling of dusts are
necessary for safe handling of product. See Section 8, EXPOSURE CONTROLS AND PERSONAL
PROTECTION.
Conditions for safe storage: Store in a dry place. Keep container tightly closed when not in use.
Preferred storage temperature is in the lower half of the range given below.
Storage stability
Storage temperature: Shelf life: Use within
0 - 50 °C (32 - 122 °F) 24 Month
8. EXPOSURE CONTROLS/PERSONAL PROTECTION
Control parameters
Exposure limits are listed below, if they exist.
None established
Exposure controls
Engineering controls: Use local exhaust ventilation, or other engineering controls to maintain
airborne levels below exposure limit requirements or guidelines. If there are no applicable exposure
limit requirements or guidelines, general ventilation should be sufficient for most operations.
Individual protection measures
Eye/face protection: Use chemical goggles.
Skin protection
Hand protection: Use gloves chemically resistant to this material when prolonged or
frequently repeated contact could occur. Examples of preferred glove barrier
materials include: Neoprene. Nitrile/butadiene rubber("nitrile"or"NBR"). Polyvinyl
chloride("PVC" or"vinyl"). NOTICE: The selection of a specific glove for a particular
application and duration of use in a workplace should also take into account all
relevant workplace factors such as, but not limited to: Other chemicals which may be
handled, physical requirements (cut/puncture protection, dexterity, thermal protection),
potential body reactions to glove materials, as well as the instructions/specifications
provided by the glove supplier.
Other protection: Wear clean, body-covering clothing.
Respiratory protection: Under intended handling conditions, no respiratory protection should
be needed.
9. PHYSICAL AND CHEMICAL PROPERTIES
Appearance
Page 4 of 9

Product name: DOWEXTM MARATHONT"' A OH Anion Exchange Issue Date: 04/07/2015
Resin
Physical state Beads
Color Yellow to brown
Odor Amine.
Odor Threshold No test data available
pH Not applicable
Melting point/range Not applicable
Freezing point Not applicable
Boiling point (760 mmHg) Not applicable
Flash point closed cup Not applicable
Evaporation Rate (Butyl Acetate No test data available
= 1)
Flammability (solid, gas) No
Lower explosion limit Not applicable
Upper explosion limit Not applicable
Vapor Pressure Not applicable
Relative Vapor Density (air= 1) Not applicable
Relative Density (water= 1) 1.04- 1.4 Literature
Water solubility Insoluble in water
Partition coefficient: n- no data available
octanol/water
Auto-ignition temperature Not applicable
Decomposition temperature No test data available
Kinematic Viscosity Not applicable
Explosive properties no data available
Oxidizing properties no data available
Molecular weight 99,999 kg/mol Calculated.
Percent volatility Not applicable
NOTE: The physical data presented above are typical values and should not be construed as a
specification.
10. STABILITY AND REACTIVITY
Reactivity: No dangerous reaction known under conditions of normal use.
Chemical stability: Stable under recommended storage conditions. See Storage, Section 7.
Possibility of hazardous reactions: Polymerization will not occur.
Conditions to avoid: Exposure to elevated temperatures can cause product to decompose.
Page 5 of 9

Product name: DOWEXTM MARATHON"' A OH Anion Exchange Issue Date: 04/07/2015
Resin
Incompatible materials: Avoid contact with oxidizing materials. Oxidizing agents such as nitric acid
attack organic exchange resins under certain conditions. Before using strong oxidizing agents, consult
sources knowledgeable in handling such materials. The severity of the reaction with oxidizing
materials can vary from slight degradation to an explosive reaction.
Hazardous decomposition products: Decomposition products depend upon temperature, air supply
and the presence of other materials. Decomposition products can include and are not limited to:
Aromatic compounds. Hydrocarbons. Organic amines.
11. TOXICOLOGICAL INFORMATION
Toxicological information on this product or its components appear in this section when such data is
available.
Acute toxicity
Acute oral toxicity
Very low toxicity if swallowed. Harmful effects not anticipated from swallowing small amounts.
LD50, Rat, > 5,000 mg/kg
Acute dermal toxicity
No adverse effects anticipated by skin absorption.
The dermal LD50 has not been determined.,
Acute inhalation toxicity
Vapors are unlikely due to physical properties. For respiratory irritation and narcotic effects:
No relevant data found.
The LC50 has not been determined.,
Skin corrosion/irritation
Essentially nonirritating to skin.
Prolonged contact may cause slight skin irritation with local redness.
Serious eye damage/eye irritation
May cause severe irritation with corneal injury which may result in permanent impairment of vision,
even blindness. Chemical burns may occur.
Sensitization
For skin sensitization:
No relevant data found.
For respiratory sensitization:
No relevant data found.
Specific Target Organ Systemic Toxicity(Single Exposure)
Evaluation of available data suggests that this material is not an STOT-SE toxicant.
Specific Target Organ Systemic Toxicity(Repeated Exposure)
Page 6 of 9

Product name: DOWEXTM MARATHON TM" A OH Anion Exchange Issue Date: 04/07/2015
Resin
No relevant data found.
Carcinogenicity
No relevant data found.
Teratogenicity
No relevant data found.
Reproductive toxicity
No relevant data found.
Mutagenicity
No relevant data found.
Aspiration Hazard
Based on physical properties, not likely to be an aspiration hazard.
12. ECOLOGICAL INFORMATION
Ecotoxicological information on this product or its components appear in this section when such data
is available.
Toxicity
Acute toxicity to fish
Not expected to be acutely toxic, but material in pellet or bead form may mechanically cause
adverse effects if ingested by waterfowl or aquatic life.
Persistence and degradability
Biodegradability: Surface photodegradation is expected with exposure to sunlight. The
polymeric component is not expected to biodegrade.
Bioaccumulative potential
Bioaccumulation: No bioconcentration of the polymeric component is expected because of
its high molecular weight.
Mobility in soil
In the terrestrial environment, material is expected to remain in the soil.
In the aquatic environment, material will sink and remain in the sediment.
13. DISPOSAL CONSIDERATIONS
Disposal methods: DO NOT DUMP INTO ANY SEWERS, ON THE GROUND, OR INTO ANY BODY
OF WATER. All disposal practices must be in compliance with all Federal, State/Provincial and local
laws and regulations. Regulations may vary in different locations. Waste characterizations and
compliance with applicable laws are the responsibility solely of the waste generator. AS YOUR
SUPPLIER, WE HAVE NO CONTROL OVER THE MANAGEMENT PRACTICES OR
MANUFACTURING PROCESSES OF PARTIES HANDLING OR USING THIS MATERIAL. THE
INFORMATION PRESENTED HERE PERTAINS ONLY TO THE PRODUCT AS SHIPPED IN ITS
Page 7 of 9

Product name: DOWEXT° MARATHON M A OH Anion Exchange Issue Date: 04/07/2015
Resin
INTENDED CONDITION AS DESCRIBED IN MSDS SECTION: Composition Information. FOR
UNUSED & UNCONTAMINATED PRODUCT, the preferred options include sending to a licensed,
permitted: Incinerator or other thermal destruction device. Landfill.
14. TRANSPORT INFORMATION
DOT
Not regulated for transport
Classification for SEA transport(IMO-IMDG):
Not regulated for transport
Transport in bulk Consult IMO regulations before transporting ocean bulk
according to Annex I or II
of MARPOL 73/78 and the
IBC or IGC Code
Classification for AIR transport(IATA/ICAO):
Not regulated for transport
This information is not intended to convey all specific regulatory or operational
requirements/information relating to this product. Transportation classifications may vary by container
volume and may be influenced by regional or country variations in regulations. Additional
transportation system information can be obtained through an authorized sales or customer service
representative. It is the responsibility of the transporting organization to follow all applicable laws,
regulations and rules relating to the transportation of the material.
15. REGULATORY INFORMATION
OSHA Hazard Communication Standard
This product is a "Hazardous Chemical"as defined by the OSHA Hazard Communication Standard,
29 CFR 1910.1200.
Superfund Amendments and Reauthorization Act of 1986 Title III (Emergency Planning and
Community Right-to-Know Act of 1986)Sections 311 and 312
Acute Health Hazard
Superfund Amendments and Reauthorization Act of 1986 Title III (Emergency Planning and
Community Right-to-Know Act of 1986) Section 313
This material does not contain any chemical components with known CAS numbers that exceed the
threshold (De Minimis) reporting levels established by SARA Title III, Section 313.
Pennsylvania Worker and Community Right-To-Know Act:
To the best of our knowledge, this product does not contain chemicals at levels which require reporting
under this statute.
Page 8 of 9

Product name: DOWEXTM MARATHON TM A OH Anion Exchange Issue Date: 04/07/2015
Resin
California Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1986)
This product contains no listed substances knownto the State of California to cause cancer, birth
defects or other reproductive harm, at levels which would require a warning under the statute.
United States TSCA Inventory(TSCA)
All components of this product are in compliance with the inventory listing requirements of the U.S.
Toxic Substances Control Act(TSCA)Chemical Substance Inventory.
•
16. OTHER INFORMATION
Product Literature
Additional information on this product may be obtained by calling your sales or customer service
contact.
Revision
Identification Number: 101195886/A001 / Issue Date: 04/07/2015/Version: 4.0
Most recent revision(s)are noted by the bold, double bars in left-hand margin throughout this
document.
Information Source and References
This SDS is prepared by Product Regulatory Services and Hazard Communications Groups from
information supplied by internal references within our company.
THE DOW CHEMICAL COMPANY urges each customer or recipient of this(M)SDS to study it
carefully and consult appropriate expertise, as necessary or appropriate, to become aware of and
understand the data contained in this (M)SDS and any hazards associated with the product. The
information herein is provided in good faith and believed to be accurate as of the effective date shown
above. However, no warranty, express or implied, is given. Regulatory requirements are subject to
change and may differ between various locations. It is the buyer's/user's responsibility to ensure that
his activities comply with all federal, state, provincial or local laws. The information presented here
pertains only to the product as shipped. Since conditions for use of the product are not under the
control of the manufacturer, it is the buyer's/user's duty to determine the conditions necessary for the
safe use of this product. Due to the proliferation of sources for information such as manufacturer-
specific(M)SDSs, we are not and cannot be responsible for(M)SDSs obtained from any source other
than ourselves. If you have obtained an (M)SDS from another source or if you are not sure that the
(M)SDS you have is current, please contact us for the most current version.
Page 9 of 9

DOW SAFETY DATA SHEET
THE DOW CHEMICAL COMPANY*
Product name: DOWEXTm MARATHON TM C H ION EXCHANGE Issue Date: 04/24/2017
RESIN
Print Date: 04/25/2017
THE DOW CHEMICAL COMPANY* encourages and expects you to read and understand the entire
(M)SDS, as there is important information throughout the document. We expect you to follow the
precautions identified in this document unless your use conditions would necessitate other appropriate
methods or actions.
1. IDENTIFICATION
Product name: DOWEXTM MARATHONTM C H ION EXCHANGE RESIN
Recommended use of the chemical and restrictions on use
Identified uses: Ion exchange and/or Adsorption process
COMPANY IDENTIFICATION
THE DOW CHEMICAL COMPANY*
Agent for Rohm and Haas Chemicals LLC
100 INDEPENDENCE MALL WEST
PHILADELPHIA PA 19106-2399
UNITED STATES
Customer Information Number: 215-592-3000
[e-mail]
EMERGENCY TELEPHONE NUMBER
24-Hour Emergency Contact: 1 800 424 9300
Local Emergency Contact: 800-424-9300
2. HAZARDS IDENTIFICATION
Hazard classification
This material is hazardous under the criteria of the Federal OSHA Hazard Communication Standard
29CFR 1910.1200.
Serious eye damage -Category 1
Label elements
Hazard pictograms
® TM Trademark of The Dow Chemical Company("Dow")or an affiliated Page 1 of 9
company of Dow

Product name: DOWEXTM MARATHONTM C H ION EXCHANGE Issue Date: 04/24/2017
RESIN
Signal word: DANGER!
Hazards
Causes serious eye damage.
Precautionary statements
Prevention
Wear eye protection/face protection.
Response
IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if
present and easy to do. Continue rinsing. Immediately call a POISON CENTER/doctor.
Other hazards
No data available
3. COMPOSITION/INFORMATION ON INGREDIENTS
Chemical nature: Sulfonated divinylbenzene/styrene copolymer.
This product is a mixture.
Component CASRN Concentration
Sulfonated polymer of styrene, ethylstyrene 69011-20-7 >=44.0- 50.0 °A)
and divinylbenzene in the hydrogen form
Water 7732-18-5 >= 50.0- 56.0 °A°
4. FIRST AID MEASURES
Description of first aid measures
Inhalation: Move to fresh air.
Skin contact: Wash off with soap and water. If skin irritation persists, call a physician.
Eye contact: Immediately flush the eye with plenty of water for at least 15 minutes, holding the eye
open. Get prompt medical attention.
Ingestion: Drink two glasses of water. If vomiting occurs spontaneously, keep airway clear. If
symptoms persist, call a physician.
Most important symptoms and effects, both acute and delayed: Aside from the information found
under Description of first aid measures (above)and Indication of immediate medical attention and
special treatment needed (below), any additional important symptoms and effects are described in
Section 11: Toxicology Information.
Indication of any immediate medical attention and special treatment needed
Page 2 of 9

Product name: DOWEXTM MARATHON TM C H ION EXCHANGE Issue Date: 04/24/2017
RESIN
Notes to physician: Treatment should be directed at preventingabsorption, administeringto
p Y P
symptoms(if they occur), and providing supportive therapy.
5. FIREFIGHTING MEASURES
Suitable extinguishing media: Water spray Carbon dioxide (CO2) Foam Dry chemical
Unsuitable extinguishing media: No data available
Special hazards arising from the substance or mixture
Hazardous combustion products: No data available
Unusual Fire and Explosion Hazards: Toxic fumes are generated when material is exposed to fire or
fire conditions. Cool closed containers exposed to fire with water spray.
Advice for firefighters
Fire Fighting Procedures: Remain upwind. Avoid breathing smoke.
Special protective equipment for firefighters: In the event of fire,wear self-contained breathing
apparatus.
6. ACCIDENTAL RELEASE MEASURES
Personal precautions, protective equipment and emergency procedures: Appropriate protective
equipment must be worn when handling a spill of this material. See SECTION 8, Exposure
Controls/Personal Protection, for recommendations. If exposed to material during clean-up
operations, see SECTION 4, First Aid Measures, for actions to follow.
Environmental precautions: WARNING: KEEP SPILLS OF PRODUCT AS SUPPLIED OUT OF
MUNICIPAL SEWERS AND OPEN BODIES OF WATER. DO NOT DISCHARGE CLEANING
RUNOFFS DIRECTLY TO OPEN BODIES OF WATER. Prevent from entering into soil, ditches,
sewers, waterways and/or groundwater. See Section 12, Ecological Information.
Methods and materials for containment and cleaning up: Keep spectators away. Floor may be
slippery; use care to avoid falling. Transfer spilled material to suitable containers for recovery or
disposal.
7. HANDLING AND STORAGE
Precautions for safe handling: Avoid repeated freeze-thaw cycles; beads may fracture. If frozen,
thaw at room temperature. Avoid contact with skin, eyes and clothing. Corrosive to eyes See
SECTION 8, Exposure Controls/Personal Protection, prior to handling.
Conditions for safe storage: Keep from freezing. Keep in a dry, cool place. Keep container tightly
closed.
Other data: CAUTION: Do not pack column with dry ion exchange resins. Dry beads expand when
wetted; this expansion can cause glass column to shatter.
Page 3 of 9

Product name: DOWEXTM MARATHON TM C H ION EXCHANGE Issue Date: 04/24/2017
RESIN
8. EXPOSURE CONTROLS/PERSONAL PROTECTION
Control parameters
Exposure limits are listed below, if they exist.
Exposure controls
Engineering controls: None required under normal operating conditions.
Protective measures: Facilities storing or utilizing this material should be equipped with an eyewash
facility.
Individual protection measures
Eye/face protection: Chemical resistant goggles must be worn. Eye protection worn must be
compatible with respiratory protection system employed.
Skin protection
Hand protection: Cotton or canvas gloves.
Respiratory protection: No personal respiratory protective equipment normally required.
9. PHYSICAL AND CHEMICAL PROPERTIES
Appearance
Physical state solid
Color yellow clear
Odor No data available
Odor Threshold No data available
pH >3.5
Melting point/range No data available
Freezing point No data available
Boiling point (760 mmHg) No data available
Flash point Not applicable
Evaporation Rate (Butyl Acetate <1
= 1)
Flammability (solid, gas) No data available
Lower explosion limit No data available
Upper explosion limit No data available
Vapor Pressure No data available
Relative Vapor Density (air= 1) No data available
Relative Density (water= 1) No data available
Water solubility insoluble
Partition coefficient: n- No data available
octanol/water
Auto-ignition temperature No data available
Decomposition temperature No data available
Kinematic Viscosity No data available
Explosive properties No data available
Page 4 of 9

Product name: DOWEXTM MARATHON TM C H ION EXCHANGE Issue Date: 04/24/2017
RESIN
Oxidizing properties No data available
Molecular weight No data available
Percent volatility 50-56
NOTE: The physical data presented above are typical values and should not be construed as a
specification.
10. STABILITY AND REACTIVITY
Reactivity: No data available
Chemical stability: No data available
Possibility of hazardous reactions: Stable under normal conditions.
Product will not undergo polymerization.
Conditions to avoid: No data available
Incompatible materials: Avoid contact with the following: Strong Oxidizers
Hazardous decomposition products: Thermal decomposition may yield the following: monomer
vapors
11. TOXICOLOGICAL INFORMATION
Toxicological information appears in this section when such data is available.
Acute toxicity
Acute oral toxicity
Product test data not available. Refer to component data.
Acute dermal toxicity
Product test data not available. Refer to component data.
Acute inhalation toxicity
Product test data not available. Refer to component data.
Skin corrosion/irritation
Product test data not available. Refer to component data.
Serious eye damage/eye irritation
Product test data not available. Refer to component data.
Sensitization
Product test data not available. Refer to component data.
Page 5 of 9

Product name: DOWEXTM MARATHON"' C H ION EXCHANGE Issue Date: 04/24/2017
RESIN
Specific Target Organ Systemic Toxicity(Single Exposure)
Product test data not available. Refer to component data.
Specific Target Organ Systemic Toxicity(Repeated Exposure)
Product test data not available. Refer to component data.
Carcinogenicity
Product test data not available. Refer to component data.
Teratogenicity
Product test data not available. Refer to component data.
Reproductive toxicity
Product test data not available. Refer to component data.
Mutagenicity
Product test data not available. Refer to component data.
Aspiration Hazard
Product test data not available. Refer to component data.
Additional information
No data are available for this material. The information shown is based on profiles of compositionally
similar materials.
COMPONENTS INFLUENCING TOXICOLOGY:
Sulfonated polymer of styrene, ethylstyrene and divinylbenzene in the hydrogen form
Acute oral toxicity
Typical for this family of materials. LD50, Rat, > 5,000 mg/kg
Acute dermal toxicity
The dermal LD50 has not been determined.
Skin corrosion/irritation
Brief contact is essentially nonirritating to skin.
Serious eye damage/eye irritation
May cause severe irritation with corneal injury which may result in permanent impairment of
vision, even blindness. Chemical burns may occur.
Sensitization
For skin sensitization:
No relevant data found.
For respiratory sensitization:
No relevant data found.
Specific Target Organ Systemic Toxicity(Single Exposure)
Evaluation of available data suggests that this material is not an STOT-SE toxicant.
Specific Target Organ Systemic Toxicity(Repeated Exposure)
No relevant data found.
Page 6 of 9

Product name: DOWEXTM MARATHONTM C H ION EXCHANGE Issue Date: 04/24/2017
RESIN
Carcinogenicity
No relevant data found.
Teratogenicity
No relevant data found.
Reproductive toxicity
No relevant data found.
Mutagenicity
Reverse mutation test using bacteria: Non-mutagenic with and without metabolic activation
Aspiration Hazard
Based on physical properties, not likely to be an aspiration hazard.
12. ECOLOGICAL INFORMATION
Ecotoxicological information appears in this section when such data is available.
General Information
There is no data available for this product.
Toxicity
Sulfonated polymer of styrene, ethylstyrene and divinylbenzene in the hydrogen form
Acute toxicity to fish
Not expected to be acutely toxic, but material in pellet or bead form may mechanically cause
adverse effects if ingested by waterfowl or aquatic life.
Persistence and degradability
Sulfonated polymer of styrene, ethylstyrene and divinylbenzene in the hydrogen form
Biodegradability: No appreciable biodegradation is expected.
Bioaccumulative potential
Sulfonated polymer of styrene, ethylstyrene and divinylbenzene in the hydrogen form
Bioaccumulation: No bioconcentration is expected because of the relatively high molecular
weight(MW greater than 1000).
Mobility in soil
Sulfonated polymer of styrene, ethylstyrene and divinylbenzene in the hydrogen form
In the terrestrial environment, material is expected to remain in the soil.
In the aquatic environment, material will sink and remain in the sediment.
Page 7 of 9

Product name: DOWEXTM MARATHONTM C H ION EXCHANGE Issue Date: 04/24/2017
RESIN
13. DISPOSAL CONSIDERATIONS
Disposal methods: Unused material may be incinerated or landfilled in facilities meeting local, state,
and federal regulations. (See 40 CFR 268)
Contaminated packaging: Empty containers should be taken to local recyclers for disposal. Refer to
applicable federal, state, and local regulations.
14. TRANSPORT INFORMATION
DOT
Not regulated for transport
Classification for SEA transport(IMO-IMDG):
Not regulated for transport
Transport in bulk Consult IMO regulations before transporting ocean bulk
according to Annex I or II
of MARPOL 73/78 and the
IBC or IGC Code
Classification for AIR transport(IATA/ICAO):
Not regulated for transport
This information is not intended to convey all specific regulatory or operational
requirements/information relating to this product. Transportation classifications may vary by container
volume and may be influenced by regional or country variations in regulations. Additional
transportation system information can be obtained through an authorized sales or customer service
representative. It is the responsibility of the transporting organization to follow all applicable laws,
regulations and rules relating to the transportation of the material.
15. REGULATORY INFORMATION
Super-fund Amendments and Reauthorization Act of 1986 Title III (Emergency Planning and
Community Right-to-Know Act of 1986) Sections 311 and 312
Acute Health Hazard
Superfund Amendments and Reauthorization Act of 1986 Title III (Emergency Planning and
Community Right-to-Know Act of 1986)Section 313
This product does not contain a chemical which is listed in Section 313 at or above de minimis
concentrations.
Pennsylvania
Page 8 of 9

Product name: DOWEXTM MARATHON TM C H ION EXCHANGE Issue Date: 04/24/2017
RESIN
Any material listed as "Not Hazardous"in the CAS REG NO. column of SECTION 2,
Composition/Information On Ingredients, of this MSDS is a trade secret under the provisions of the
Pennsylvania Worker and Community Right-to-Know Act.
United States TSCA Inventory(TSCA)
All components of this product are in compliance with the inventory listing requirements of the U.S.
Toxic Substances Control Act(TSCA) Chemical Substance Inventory.
16. OTHER INFORMATION
Hazard Rating System
HMIS
Health Flammability Physical
Hazard
3 1 0
Revision
Identification Number: 101169021 / 1001 /Issue Date: 04/24/2017/Version: 2.1
Most recent revision(s)are noted by the bold, double bars in left-hand margin throughout this
document.
Information Source and References
This SDS is prepared by Product Regulatory Services and Hazard Communications Groups from
information supplied by internal references within our company.
THE DOW CHEMICAL COMPANY` urges each customer or recipient of this (M)SDS to study it
carefully and consult appropriate expertise, as necessary or appropriate, to become aware of and
understand the data contained in this(M)SDS and any hazards associated with the product. The
information herein is provided in good faith and believed to be accurate as of the effective date shown
above. However, no warranty, express or implied, is given. Regulatory requirements are subject to
change and may differ between various locations. It is the buyer's/user's responsibility to ensure that
his activities comply with all federal, state, provincial or local laws. The information presented here
pertains only to the product as shipped. Since conditions for use of the product are not under the
control of the manufacturer, it is the buyer's/user's duty to determine the conditions necessary for the
safe use of this product. Due to the proliferation of sources for information such as manufacturer-
specific(M)SDSs, we are not and cannot be responsible for(M)SDSs obtained from any source other
than ourselves. If you have obtained an (M)SDS from another source or if you are not sure that the
(M)SDS you have is current, please contact us for the most current version.
Page 9 of 9

Version: 1.2
Effective Date: Dec-20-2017
Previous Date: Dec-18-2017
cfp sue2
SAFETY DATA SHEET
HYPERSPERSE* MDC714
1. Identification
Product identifier HYPERSPERSE MDC714
Other means of identification None.
Recommended use Membrane Deposit Control Agent
Recommended restrictions None known.
Company/undertaking identification
SUEZ WTS USA, Inc.
4636 Somerton Road
Trevose, PA 19053
T 215 355 3300, F 215 953 5524
Emergency telephone
[phone]
2. Hazard(s) identification
Physical hazards Not classified.
Health hazards Not classified.
OSHA defined hazards Not classified.
Label elements
Hazard symbol None.
Signal word None.
Hazard statement The mixture does not meet the criteria for classification.
Precautionary statement
Prevention Observe good industrial hygiene practices.
Response Wash hands after handling.
Storage Store away from incompatible materials.
Disposal Dispose of waste and residues in accordance with local authority requirements.
Hazard(s)not otherwise None known.
classified(HNOC)
Supplemental information None.
3. Composition/information on ingredients
Mixtures
The manufacturer lists no ingredients as hazardous according to OSHA 29 CFR 1910.1200.
Composition comments Information for specific product ingredients as required by the U.S. OSHA HAZARD
COMMUNICATION STANDARD is listed. Refer to additional sections of this SDS for our
assessment of the potential hazards of this formulation.
4. First-aid measures
Inhalation If breathing is difficult, remove to fresh air and keep at rest in a position comfortable for breathing.
If breathing stops, provide artificial respiration. For breathing difficulties, oxygen may be
necessary. Call a physician if symptoms develop or persist.
Page: 1 /7

Skin contact Rinse skin with water/shower. Get medical attention if irritation develops and persists.
Eye contact Rinse with water. Remove contact lenses, if present and easy to do. Get medical attention if
irritation develops and persists.
Ingestion Rinse mouth. Never give anything by mouth to a victim who is unconscious or is having
convulsions. If ingestion of a large amount does occur, call a poison control center immediately.
Do not induce vomiting.
Most important Direct contact with eyes may cause temporary irritation.
symptoms/effects,acute and
delayed
Indication of immediate Treat symptomatically.
medical attention and special
treatment needed
General information Ensure that medical personnel are aware of the material(s)involved, and take precautions to
protect themselves.
5. Fire-fighting measures
Suitable extinguishing media Water fog. Foam. Dry chemical powder. Carbon dioxide(CO2).
Unsuitable extinguishing Do not use water jet as an extinguisher, as this will spread the fire.
media
Specific hazards arising from During fire, gases hazardous to health may be formed.
the chemical
Special protective equipment Wear full protective clothing, including helmet, self-contained positive pressure or pressure
and precautions for firefighters demand breathing apparatus, protective clothing and face mask.
Fire fighting In case of fire and/or explosion do not breathe fumes. Use standard firefighting procedures and
equipment/instructions consider the hazards of other involved materials. Move containers from fire area if you can do so
without risk. Cool containers/tanks with water spray.
Specific methods Use standard firefighting procedures and consider the hazards of other involved materials.
General fire hazards No unusual fire or explosion hazards noted.
6. Accidental release measures
Personal precautions, Keep unnecessary personnel away. Keep people away from and upwind of spill/leak. Keep out of
protective equipment and low areas.Wear appropriate protective equipment and clothing during clean-up. Do not touch
emergency procedures damaged containers or spilled material unless wearing appropriate protective clothing. See
Section 8 of the SDS for Personal Protective Equipment. For personal protection, see section 8 of
the SDS.
Methods and materials for Prevent entry into waterways, sewer, basements or confined areas.
containment and cleaning up
Large Spills: Stop the flow of material, if this is without risk. Dike the spilled material,where this is
possible. Cover with plastic sheet to prevent spreading.Absorb in vermiculite, dry sand or earth
and place into containers. Following product recovery, flush area with water.
Small Spills:Wipe up with absorbent material(e.g. cloth, fleece). Clean surface thoroughly to
remove residual contamination.
Never return spills to original containers for re-use. For waste disposal, see section 13 of the SDS.
Environmental precautions Avoid discharge into drains,water courses or onto the ground.Water contaminated with this
product may be sent to a sanitary sewer treatment facility, or a permitted waste treatment facility,
in accordance with any local agreements.
7. Handling and storage
Precautions for safe handling Avoid prolonged exposure.
Use care in handling/storage.
Conditions for safe storage, Store in original tightly closed container. Store away from incompatible materials(see Section 10
including any incompatibilities of the SDS). Store in accordance with local/regional/national/international regulation.
8. Exposure controls/personal protection
Biological limit values No biological exposure limits noted for the ingredient(s).
Appropriate engineering Good general ventilation(typically 10 air changes per hour)should be used.Ventilation rates
controls should be matched to conditions. If applicable, use process enclosures, local exhaust ventilation,
or other engineering controls to maintain airborne levels below recommended exposure limits. If
exposure limits have not been established, maintain airborne levels to an acceptable level.
Material name:HYPERSPERSE*MDC714 Page: 2/7
Version number: 1.2

Individual protection measures,such as personal protective equipment
Eye/face protection Wear safety glasses with side shields(or goggles).
Skin protection
Hand protection Wear appropriate chemical resistant gloves.The choice of an appropriate glove does not only
depend on its material but also on other quality features and is different from one producer to the
other. Glove selection must take into account any solvents and other hazards present.
Other Wear suitable protective clothing. Chemical resistant gloves.
Respiratory protection If engineering controls do not maintain airborne concentrations below recommended exposure
limits(where applicable)or to an acceptable level(in countries where exposure limits have not
been established), an approved respirator must be worn.A RESPIRATORY PROTECTION
PROGRAM THAT MEETS OSHA'S 29 CFR 1910.134 AND ANSI Z88.2 REQUIREMENTS MUST
BE FOLLOWED WHENEVER WORKPLACE CONDITIONS WARRANT A RESPIRATOR'S USE.
Thermal hazards Wear appropriate thermal protective clothing,when necessary.
General hygiene Always observe good personal hygiene measures, such as washing after handling the material
considerations and before eating, drinking, and/or smoking. Routinely wash work clothing and protective
equipment to remove contaminants.
9. Physical and chemical properties
Appearance
Color Colorless to yellow
Physical state Liquid
Odor Slight
Odor threshold Not available.
pH(concentrated product) 7.6 Neat
pH in aqueous solution 7.9(5%Solution)
Melting point/freezing point -8°F(-22°C)
Initial boiling point and boiling 216°F(102°C)
range
Flash point Not applicable.
Evaporation rate Slower than Ether
Flammability(solid, gas) Not available.
Upper/lower flammability or explosive limits
Flammability limit-lower Not available.
(%)
Flammability limit-upper Not available.
(%)
Explosive limit-lower(%) Not available.
Explosive limit-upper(%) Not available.
Vapor pressure 18 mmHg
Vapor pressure temp. 70°F(21 °C)
Vapor density < 1
Relative density 1.42
Relative density temperature 70°F(21 °C)
Solubility(ies)
Solubility(water) 100%
Partition coefficient Not available.
(n-octanol/water)
Auto-ignition temperature Not available.
Decomposition temperature Not available.
Viscosity 25 mPa.s
Viscosity temperature 70°F(21 °C)
Other information
Pour point -3°F(-19°C)
Specific gravity 1.419
Material name:HYPERSPERSE*MDC714 Page: 3/7
Version number: 1.2

VOC 0% ESTIMATED
10. Stability and reactivity
Reactivity The product is stable and non-reactive under normal conditions of use, storage and transport.
Chemical stability Material is stable under normal conditions.
Possibility of hazardous Hazardous polymerization does not occur.
reactions
Conditions to avoid Contact with incompatible materials.
Incompatible materials Strong oxidizing agents.
Hazardous decomposition Oxides of carbon, nitrogen and phosphorus evolved in fire.
products
11. Toxicological information
Information on likely routes of exposure
Inhalation No adverse effects due to inhalation are expected.
Skin contact No adverse effects due to skin contact are expected.
Eye contact Direct contact with eyes may cause temporary irritation.
Ingestion Expected to be a low ingestion hazard.
Symptoms related to the Direct contact with eyes may cause temporary irritation.
physical, chemical and
toxicological characteristics
Information on toxicological effects
Acute toxicity
Product Species Test Results
HYPERSPERSE MDC714(CAS Mixture)
Acute
Oral
LD50 Rat >5000 mg/kg
* Estimates for product may be based on additional component data not shown.
Skin corrosion/irritation Prolonged skin contact may cause temporary irritation.
Serious eye damage/eye Direct contact with eyes may cause temporary irritation.
irritation
Respiratory or skin sensitization
Respiratory sensitization This product is not expected to cause respiratory sensitization.
Skin sensitization This product is not expected to cause skin sensitization.
Germ cell mutagenicity No data available to indicate product or any components present at greater than 0.1%are
mutagenic or genotoxic.
Carcinogenicity This product is not considered to be a carcinogen by IARC, ACGIH, NTP, or OSHA.
IARC Monographs.Overall Evaluation of Carcinogenicity
Not listed.
OSHA Specifically Regulated Substances(29 CFR 1910.1001-1050)
Not regulated.
US.National Toxicology Program(NTP)Report on Carcinogens
Not listed.
Reproductive toxicity This product is not expected to cause reproductive or developmental effects.
Specific target organ toxicity- Not classified.
single exposure
Specific target organ toxicity- Not classified.
repeated exposure
Aspiration hazard Based on available data,the classification criteria are not met.
Chronic effects Prolonged inhalation may be harmful.
Material name:HYPERSPERSE*MDC714 Page: 4/7
Version number: 1.2

12. Ecological information
Ecotoxicity
Product Species Test Results
HYPERSPERSE MDC714(CAS Mixture)
LC50 Fathead Minnow 5098 mg/L, Static Renewal Bioassay, 96
hour
NOEL Fathead Minnow 2000 mg/L, Static Renewal Bioassay, 96
hour
Aquatic
Crustacea LC50 Daphnia magna 1366 mg/L, Static Renewal Bioassay, 48
hour
NOEL Daphnia magna 1000 mg/L, Static Renewal Bioassay,48
hour
Fish LC50 Rainbow Trout 5464 mg/L, Static Renewal Bioassay, 96
hour
NOEL Rainbow Trout 4000 mg/L, Static Renewal Bioassay, 96
hour
Bioaccumulative potential Not bioaccumulating
Mobility in soil No data available.
Other adverse effects Nutrients: P=98,3 mg/g; N=14mg/g
Persistence and degradability
Not inherently biodegradable.
- COD (mgO21g) 180(calculated data)
- BOD 5 (mgO21g) 0(calculated data)
- BOD 28 (mgO2/g) 0(calculated data)
- TOC (mg Clg) 38,5
13. Disposal considerations
Disposal instructions Collect and reclaim or dispose in sealed containers at licensed waste disposal site. Dispose of
contents/container in accordance with local/regional/national/international regulations.
Local disposal regulations Dispose in accordance with all applicable regulations.
Hazardous waste code The waste code should be assigned in discussion between the user, the producer and the waste
disposal company.
Waste from residues/unused Dispose of in accordance with local regulations. Empty containers or liners may retain some
products product residues.This material and its container must be disposed of in a safe manner(see:
Disposal instructions). Empty containers or liners may retain some product residues. This material
and its container must be disposed of in a safe manner.
Contaminated packaging Since emptied containers may retain product residue,follow label warnings even after container is
emptied. Empty containers should be taken to an approved waste handling site for recycling or
disposal.
14. Transport information
DOT
Not regulated as dangerous goods.
Some containers may be exempt from Dangerous Goods/Hazmat Transport Regulations, please check BOL for exact container
classification.
IATA
Not regulated as dangerous goods.
IMDG
Not regulated as dangerous goods.
15. Regulatory information
US federal regulations This product is not known to be a"Hazardous Chemical"as defined by the OSHA Hazard
Communication Standard, 29 CFR 1910.1200.
TSCA Section 12(b)Export Notification(40 CFR 707,Subpt.D)
Not regulated.
Material name:HYPERSPERSE`MDC714 Page: 5/7
Version number: 1.2

CERCLA Hazardous Substance List(40 CFR 302.4)
Not listed.
SARA 304 Emergency release notification
Not regulated.
OSHA Specifically Regulated Substances(29 CFR 1910.1001-1050)
Not regulated.
Superfund Amendments and Reauthorization Act of 1986(SARA)
Hazard categories Immediate Hazard-No
Delayed Hazard-No
Fire Hazard-No
Pressure Hazard-No
Reactivity Hazard-No
SARA 302 Extremely hazardous substance
Not listed.
SARA 311/312 Hazardous No
chemical
SARA 313(TRI reporting)
Not regulated.
Other federal regulations
Clean Air Act(CAA)Section 112 Hazardous Air Pollutants(HAPs)List
Not regulated.
Clean Air Act(CAA)Section 112(r)Accidental Release Prevention (40 CFR 68.130)
Not regulated.
Safe Drinking Water Act Not regulated.
(SDWA)
Inventory status
Country(s)or region Inventory name On inventory(yes/no)*
Canada Domestic Substances List(DSL) Yes
Canada Non-Domestic Substances List(NDSL) No
United States&Puerto Rico Toxic Substances Control Act(TSCA)Inventory Yes
*A"Yes"indicates that all components of this product comply with the inventory requirements administered by the governing country(s)
A"No"indicates that one or more components of the product are not listed or exempt from listing on the inventory administered by the governing
country(s).
US state regulations
US-California Proposition 65-CRT: Listed date/Carcinogenic substance
No ingredient listed.
US-California Proposition 65-CRT: Listed date/Developmental toxin
No ingredient listed.
US-California Proposition 65-CRT: Listed date/Female reproductive toxin
No ingredient listed.
US-California Proposition 65-CRT: Listed date/Male reproductive toxin
No ingredient listed.
US-Massachusetts RTK-Substance List
Not regulated.
US-Pennsylvania RTK-Hazardous Substances
Not regulated.
US-Rhode Island RTK
Not regulated.
US.California Proposition 65
Not Listed.
16. Other information, including date of preparation or last revision
Issue date Oct-08-2014
Revision date Dec-20-2017
Version# 1.2
Material name:HYPERSPERSE*MDC714 Page 6/7
Version number: 1.2

List of abbreviations CAS: Chemical Abstract Service Registration Number
ACGIH:American Conference of Governmental Industrial Hygienists
NOEL: No Observed Effect Level
STEL: Short Term Exposure Limit
LD50: Lethal Dose, 50%
LC50: Lethal Concentration, 50%
TWA: Time Weighted Average
BOD: Biochemical Oxygen Demand
COD: Chemical Oxygen Demand
TOC:Total Organic Carbon
IATA: International Air Transport Association
IMDG: International Maritime Dangerous Goods Code
TSRN indicates a Trade Secret Registry Number is used in place of the CAS number.
References: No data available
Disclaimer The information provided in this Safety Data Sheet is correct to the best of our knowledge,
information and belief at the date of its publication.The information given is designed only as a
guidance for safe handling, use, processing, storage,transportation, disposal and release and is
not to be considered a warranty or quality specification. The information relates only to the specific
material designated and may not be valid for such material used in combination with any other
materials or in any process, unless specified in the text.
Prepared by This SDS has been prepared by SUEZ Regulatory Department(1-215-355-3300).
*Trademark of SUEZ. May be registered in one or more countries.
Material name:HYPERSPERSE*MDC714 Page: 7/7
Version number: 1.2

IA°©©`I° SAFETY DATA SHEET SDS NUMBER: EUSA-120
CURRENT ISSUE DATE:
April, 2017
SODIUM METABISULFITE Page 1 of 8
1. PRODUCT AND COMPANY IDENTIFICATION
PRODUCT NAME: Sodium Metabisulfite
OTHER/GENERIC NAMES: Sodium Pyrosulfite
ABS
PRODUCT USE AND Drug manufacture, food additive, water treatment, textile manufacture,
RESTRICTIONS ON USE: photographic chemicals, and other chemical processes.
SUPPLIER: Esseco USA LLC
4 Gatehall Drive
Parsippany, NJ 07054
FOR MORE INFORMATION CALL: 973-267-3330
(Monday-Friday, 9:00am-4:30pm)
FOR EMERGENCY IN USA, CALL CHEMTREC: 800-424-9300
(24 Hours/Day, 7 Days/Week)
2. HAZARDS IDENTIFICATION
GHS Classification
Acute Toxicity Category 4 (Oral)
Eye Damage Category 1
Label Elements:
LrI
• ,
DANGER
Harmful if swallowed.
Causes serious eye damage.
Wash thoroughly after handling.
Do not eat, drink or smoke when using this product.
Wear eye protection.
IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do.
Continue rinsing.
Immediately call a POISON CENTER or doctor.
IF SWALLOWED: Call a POISON CENTER or doctor if you feel unwell.
Rinse mouth.

IR°©`A`�`'' SAFETY DATA SHEET SDS NUMBER: EUSA-120
CURRENT ISSUE DATE:
April, 2017
SODIUM METABISULFITE Page 2 of 8
Dispose of contents and container in accordance with local, state, and federal regulations.
3. COMPOSITION/INFORMATION ON INGREDIENTS
INGREDIENT NAME CAS NUMBER WEIGHT%
Sodium metabisulfite 7681-57-4 >_97
Trace impurities and additional material names not listed above may appear in Section 15 of this SDS. These materials
may be listed for local"Right-To-Know"compliance and for other reasons. The exact concentrations are a trade secret.
4. FIRST AID MEASURES II
SKIN: Wash skin with plenty of soap and water. Remove contaminated clothing and launder
before reuse. Get medical attention if irritation persists.
EYES: Flush eyes immediately with water for at least 15 minutes. Remove contact lenses if
present after the first 5 minutes if you can do so easily and continue flushing. Get
immediate medical attention.
INHALATION: Remove to fresh air. Get immediate medical attention if signs of suffocation, irritation,
difficulty breathing, or other symptoms develop.
INGESTION: Rinse mouth with water and give 1 glass of water to drink. Do not induce vomiting unless
directed to do so be medical personnel. Get medical attention if symptoms develop.
MOST IMPORTANT May irritate the skin. May cause irritation and/or burns to the eyes. Harmful if
SYMPTOMS/EFFECTS, swallowed or inhaled. May cause severe and possibly fatal allergic reactions if
ACUTE AND DELAYED: inhaled or swallowed by some asthmatics and other 'sulfite-sensitive' individuals.
Reacts with acids to form toxic and irritating sulfur dioxide gas. Releases sulfur
dioxide if heated above 150°C (302°F).
INDICATION OF Immediate medical attention is required for eye contact and allergic respiratory
IMMEDIATE MEDICAL reaction. Treat symptomatically. Note potential for anaphylactic shock with
ATTENTION AND allergic individuals.
SPECIAL TREATMENT,
IF NEEDED:
5. FIRE FIGHTING MEASURES
SUITABLE (AND UNSUITABLE) EXTINGUISHING MEDIA:
Material is not flammable. Use extinguishing media appropriate for material in surrounding fire.
SPECIFIC HAZARDS ARISING FROM THE CHEMICAL:
Releases toxic and irritating sulfur dioxide at fire temperatures.
SPECIAL PROTECTIVE EQUIPMENT AND PRECAUTIONS FOR FIRE-FIGHTING:
Wear NIOSH-approved self-contained breathing apparatus.
6. ACCIDENTAL RELEASE MEASURES

FI©©M SAFETY DATA SHEET SDS NUMBER: EUSA-120
CURRENT ISSUE DATE:
April, 2017
SODIUM METABISULFITE Page 3 of 8
•
PERSONAL PRECAUTIONS, PROTECTIVE EQUIPMENT, AND EMERGENCY PROCEDURES: Provide ventilation to clear
sulfur dioxide fumes which may be generated by contact with water. Wear appropriate personal protective equipment.
ENVIRONMENTAL PRECAUTIONS: Spills and releases may have to be reported to Federal and/or local authorities. See
Section 15 regarding reporting requirements.
METHODS AND MATERIALS FOR CONTAINMENT AND CLEANING UP: Promptly sweep up material with minimum dusting
and shovel into an empty container with a cover. Rinse spill area with plenty of water.
7. HANDLING AND STORAGE ,
PRECAUTIONS FOR SAFE HANDLING: (See section 8 for recommended personal protective equipment.)
Avoid contact with skin, eyes and clothing. Do not breathe dust. Do not eat or drink in the work area. Use normal
personal hygiene and housekeeping. Keep away from water, ice, acids, heat and oxidizing agents. For Food Grade
product, see precautions in section 16 regarding on-board use in preserving shrimp and fish.
CONDITIONS FOR SAFE STORAGE, INCLUDING ANY INCOMPATIBILITIES:
Store in a cool, dry, well-ventilated area away from water, ice, acids, and oxidizing agents. Releases sulfur
dioxide gas slowly at ambient temperatures.
8. EXPOSURE CONTROLS/PERSONAL PROTECTION
EXPOSURE GUIDELINES
INGREDIENT NAME ACGIH TLV OSHA PEL OTHER LIMIT
Sodium metabisulfite 5 mg/m3 TWA None None
OTHER EXPOSURE LIMITS FOR POTENTIAL DECOMPOSITION PRODUCTS:
Sulfur dioxide: OSHA TWA= 5 ppm
ACGIH STEL= 0.25 ppm
APPROPRIATE ENGINEERING CONTROLS:
Local exhaust if dusty conditions exist or if there is a release of sulfur dioxide gas. Do not use in unventilated
spaces, e.g., the holds of fishing boats, walk-in coolers or confined spaces.
INDIVIDUAL PROTECTION MEASURES, SUCH AS PERSONAL PROTECTIVE EQUIPMENT
SKIN PROTECTION: For handling dry material, wear rubber gloves and full work clothing,
including long-sleeved shirt and trousers. When handling solutions and there is
prolonged or repeated contact, wear impervious gloves, clothing and boots.
EYE PROTECTION: Wear chemical safety goggles.

H°©°C�n SAFETY DATA SHEET SDS NUMBER: EUSA-120
CURRENT ISSUE DATE:
• April, 2017
SODIUM METABISULFITE Page 4 of 8
RESPIRATORY PROTECTION: Where required, use a NIOSH-approved respirator for dust, mist and/or sulfur
dioxide gas, as conditions indicate. Some exposures may require a NIOSH-
approved self-contained breathing apparatus or supplied-air respirator.
Equipment selection depends on contaminant type and concentration. Select
in accordance with 29 CFR 1910.134 and good industrial hygiene practice.
ADDITIONAL RECOMMENDATIONS: Eyewash and safety shower are recommended.
9. PHYSICAL AND CHEMICAL PROPERTIES
APPEARANCE: Fine, white granular material.
PHYSICAL STATE: Solid.
ODOR: Pungent sulfur dioxide odor.
ODOR THRESOLD: Not determined.
MOLECULAR WEIGHT: 190.11
CHEMICAL FORMULA: Na2S205
RELATIVE DENSITY (water = 1.0): 1.48
SOLUBILITY IN WATER(weight%): 39%at 16°C (60.8°F)
pH: 1%solution -4.3
INITIAL BOILING POINT/RANGE: Not applicable.
MELTING/FREEZING POINT: Begins to rapidly decompose above 150°C (302°F)
VAPOR PRESSURE: Not applicable.
VAPOR DENSITY (air = 1.0): Not applicable.
EVAPORATION RATE: Not applicable. COMPARED TO: Not applicable.
%VOLATILES: Not applicable.
PARTITION COEFFICIENT(N- Not determined.
OCTANOL/WATER):
VISCOSITY: Not applicable.
FLASH POINT: Not flammable.
FLASH POINT METHOD: Not applicable.
AUTOIGNITION TEMPERATURE: Not applicable.
UPPER FLAME LIMIT(volume%in air): Not applicable.
LOWER FLAME LIMIT(volume%in air): Not applicable.
DECOMPOSITION TEMPERATURE: Not determined.
FLAMMABILITY (SOLID, GAS) Not flammable.
OSHA FLAMMABILITY CLASS: Not applicable.
10. STABILITY AND REACTIVITY
REACTIVITY:
Not normally reactive
CHEMICAL STABILITY:
Normally stable.
POSSIBILITY OF HAZARDOUS REACTIONS:
Reacts with acids to form toxic and irritating sulfur dioxide gas.
CONDITIONS TO AVOID:
Avoid elevated temperatures. Temperatures above 150°C (302°F) cause the rapid evolution of toxic and corrosive
sulfur dioxide gas.

°°©©�'��'' SAFETY DATA SHEET SDS NUMBER: EUSA-120
CURRENT ISSUE DATE:
April, 2017
SODIUM METABISULFITE Page 5 of 8
INCOMPATIBILITIES:
Oxidizers: may cause strong exothermic reactions.
Acids, water and ice: releases sulfur dioxide gas which is toxic, corrosive, and potentially deadly. Water and/or
ice speeds the production of sulfur dioxide gas.
HAZARDOUS DECOMPOSITION PRODUCTS:
Sulfur dioxide and sodium sulfide residue. Sodium sulfide is flammable, a dangerous fire risk, a strong irritant to
skin and tissue, and is incompatible with acids.
11. TOXICOLOGICAL INFORMATION
POTENTIAL HEALTH HAZARDS
ACUTE EFFECTS OF EXPOSURE:
SKIN: Repeated or prolonged contact with dust may cause irritation. Contact with solutions will
cause skin irritation and possibly burns.
EYES: Dust or mist may irritate or burn the eyes. Solutions will irritate or burn. Permanent eye
injury is possible.
INHALATION: Inhalation of dust or mist can irritate the respiratory tract. May cause severe or deadly
allergic reactions in some asthmatics and sulfite sensitive individuals. Possible signs and
symptoms of allergic reactions include bronchoconstriction, sweating, flushing, hives,
rapid heart rate, decreased blood pressure, and anaphylaxis. Contact with acids, water
and/or ice, releases sulfur dioxide gas which may be harmful or deadly if inhaled.
INGESTION: May irritate the gastrointestinal tract. May cause severe or deadly allergic reactions in
some asthmatics and sulfite sensitive individuals. Very large doses may cause violent colic,
diarrhea, depression, and even death.
CHRONIC EFFECTS: None known.
Ingredients found on one of the three OSHA designated carcinogen lists are listed below.
INGREDIENT NAME NTP STATUS IARC STATUS OSHA LIST
No ingredients listed in this section.
NUMERICAL MEASURES OF TOXICITY:
Immediate (Acute) Effects:
Sodium metabisulfite - LD50 (oral, rat) = 1131 - 3200 mg/kg
Delayed (Subchronic and Chronic) Effects:
Sodium metabisulfite is not mutagenic in microbial systems or in rat bone marrow metaphase assay or dominant
lethal test in rats. A 2 year feeding study in rats was negative for carcinogenicity. In a three generation feeding
study in rats, no adverse effects on reproduction was observed.
Other Data:
None

AOM
EH°©°C��'' SAFETY DATA SHEET SDS NUMBER: EUSA-120
CURRENT ISSUE DATE:
April, 2017
SODIUM METABISULFITE Page 6 of 8
12. ECOLOGICAL INFORMATION
ECOTOXICITY:
The following ecotoxicity data is available for Sodium metabisulfite:
Daphnia EC50 48h 89 mg/L
Fish LC50 96h 32 mg/L
Algae EC50 72h 48 mg/L
PERSISTENCE AND DEGRADBILITY:
Chemical Oxygen Demand (COD) 168 mg/g
BIOACCUMULATIVE POTENTIAL:
No data available
MOBILITY IN SOIL:
No data available
OTHER ADVERSE EFFECTS:
No data available.
13. DISPOSAL CONSIDERATIONS
RCRA
Is the unused product a RCRA hazardous waste if If yes, the RCRA ID number is: Not applicable.
discarded? No
OTHER DISPOSAL CONSIDERATIONS:
Dispose of in accordance with applicable Federal, State and Local regulations.
The information offered in section 13 is for the product as shipped. Use and/or alterations to the product such as
mixing with other materials may significantly change the characteristics of the material and alter the RCRA
classification and the proper disposal method.
14. TRANSPORT INFORMATION
US DOT HAZARD CLASS: Not regulated.
US DOT ID NUMBER: Not applicable.
PROPER SHIPPING NAME: Not applicable.
For additional information on shipping regulations affecting this material, contact the information number found in
Section 1.
15. REGULATORY INFORMATION
TOXIC SUBSTANCES CONTROL ACT(TSCA)
TSCA INVENTORY STATUS: All components are listed on TSCA Inventory of Chemical Substances.
OTHER TSCA ISSUES: None.

tin
n©©[l O SAFETY DATA SHEET SDS NUMBER: EUSA-120
CURRENT ISSUE DATE:
April, 2017
SODIUM METABISULFITE Page 7 of 8
SARA TITLE III/CERCLA
"Reportable Quantities" (RQs) and/or"Threshold Planning Quantities" (TPQs) exist for the following ingredients.
INGREDIENT NAME SARA/CERCLA RQ(lb) SARA EHS TPQ(lb)
No ingredients listed in this section.
Spills or releases resulting in the loss of any ingredient at or above its RQ requires immediate notification to
the National Response Center [[phone]] and to your Local Emergency Planning Committee. Many '
states have more stringent regulations. Report all spills in accordance with local, state and federal
regulations.
SECTION 311 HAZARD CLASS: See OSHA Hazard Classification in Section 2.
SARA 313 TOXIC CHEMICALS:
The following ingredients are SARA 313 "Toxic Chemicals" and may be subject to annual reporting requirements.
CAS numbers and weight percents are found in Section 2.
INGREDIENT NAME COMMENT
No ingredients listed in this section.
STATE RIGHT-TO-KNOW
In addition to the ingredients found in Section 2, the following are listed for state right-to-know purposes.
INGREDIENT NAME WEIGHT% COMMENT
No ingredients listed in this section.
CALIFORNIA PROPOSITION 65
This product does not contain any ingredients known to the State of California to cause cancer and/or reproductive
harm.
ADDITIONAL REGULATORY INFORMATION:
None
FOREIGN CHEMICAL CONTROL INVENTORY STATUS:
Listed on Canadian DSL, Australian AICS, Phillipines PICCS, Chinese IECSC, Japanese MITI, Korean KECL, and EU
EINECS.
16. OTHER INFORMATION
CURRENT ISSUE DATE: April, 2017
PREVIOUS ISSUE DATE: November, 2013
CHANGES TO SDS FROM PREVIOUS ISSUE DATE ARE DUE TO THE FOLLOWING:
Removed old WHMIS classification system.

IH©`A`'��'' SAFETY DATA SHEET SDS NUMBER: EUSA-120
CURRENT ISSUE DATE:
April, 2017
SODIUM METABISULFITE Page 8 of 8
OTHER INFORMATION: Only NF grade is for use in drug formulation. Only Food Grade material is for use as
a food additive.
On-board ship use of Food Grade material to preserve shrimp and fish:
NEVER apply dry material to shrimp or fish. ALWAYS prepare and use a solution in a
well-ventilated area.
NEVER use below deck or in any confined space such as a hold or cooler. Injury or
death may occur.
ALWAYS use on deck with plenty of ventilation. Follow mixing and use directions
printed on bag.
The information in this Safety Data Sheet is believed to be accurate and reliable as of the date issued. Esseco
USA makes no warranties, expressed or implied, including, but not limited to, any implied warranty of
merchantability or fitness for a particular purpose or course of performance or usage of trade. Accordingly,
Esseco USA will not be responsible for damages resulting from use of or reliance upon this information. The user
is responsible for determining whether the Esseco USA product is fit for a particular purpose and suitable for
user's method of use or application. Given the variety of factors that can affect the use and application on an
Esseco USA product, some of which are uniquely within the user's knowledge and control, it is essential that the
user evaluate the Esseco USA product to determine whether it is fit for a particular purpose and suitable for
user's method of use or application.

Attachment J.4 Engineering Alternatives Analysis —
Reverse Osmosis Permeate Discharge

Chemours Fayetteville Engineering Alternatives
Analysis (EAA) for NPDES Permit
Application-Reverse Osmosis Permeate
Discharge
Prepared for:
The Chemours Company FC, LLC (Fayetteville)
Prepared by:
N F-4
November 2020
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4701 Hedgemore Drive ♦Charlotte,NC 28209
The Chemours Company P:+1704.529.62461 F:+1 704.529.0374
Engineering Alternatives Analysis-Reverse Osmosis Permeate www.parsons.com
November 2020
Page 2
Applicants Information:
Applicant Name:Chemours Company(The Chemours Company Fc, LLC)
Facility Name: Fayetteville Works
Facility Mailing Address: 22828 NC Highway 87 W, Fayetteville, NC 28306
County: Bladen
Phone Number: [phone]
Preparer's Information:
EEA Preparer: Parsons Corporation
Mailing Address:4701 Hedgemore Drive,Charlotte, NC 28209
Phone Number:+1 704.529.6246
■
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4701 Hedgemore Drive♦Charlotte,NC 28209
The Chemours Company P:+1 704.529.6246 I F:+1704.529.0374
Engineering Alternatives Analysis-Reverse Osmosis Permeate www.parsons.com
November 2020
Page 3
Table of Contents
Page
SITE HISTORY AND BACKGROUND 4
Project SUMMARY 6
STEP 1 8
ALLOWABILITY OF PROPOSED DISCHARGE 8
Schedule 12
STEP 2 12
Flow Projection and Flow Basis Justification 12
STEP 3 13
Technologically Feasible Discharge Alternatives Evaluation 13
Alternative A: Connection to Existing Treatment Plant 13
Alternative B: Land Application Alternative Evaluation 13
Alternative C: RO Permeate Reuse in Facility 13
Alternative D: Direct Discharge 13
Alternative E: Off-Site Disposal 14
Alternative F: Combination of Alternatives 14
STEP 4 15
ECONOMIC FEASABILITY of ALTERNATIVES 15
CONCLUSION AND PATH FORWARD 15
List of Tables
Table 1- Possible Chemicals in Influent Stream (pre-RO system)
Table 2 - Recycling Criteria for reuse of RO Permeate
Table 3 -Cost Summary Table
List of Figures
Figure 1-Site Location Map
Figure 2 - RO System Flow Diagram
Figure 3 -Site Plan, RO System and WWTP Location
Figure 4 - Receiving Stream Classification
Figure 5 -Sub-Basin Water Quality Plan
Figure 6 - Impaired Waters Map
Figure 7 - Site WWTP Flow Diagram
SJ
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Engineering Alternatives Analysis-Reverse Osmosis Permeate www.parsons.com
November 2020
Page 4
SITE HISTORY AND BACKGROUND
In accordance with 15A NCAC 2H.0105(c)(2), Chemours Company FC, LLC (Chemours) has prepared this
Engineering Alternatives Analysis(EAA)for the review of the NCDEQ to support the NPDES permit application for
a Reverse Osmosis (RO) permeate stream at the Fayetteville Works Facility (the Site), Bladen County, North
Carolina. An NPDES permit application and supporting EAA is a requirement for permit applications per the
NCDEQ.
The Site is located on NC Highway 87, 15 miles southeast of the City of Fayetteville, and south of the Bladen-
Cumberland county line. The Site encompasses 2,177 acres of relatively flat undeveloped open land and
woodland bounded on the east by the Cape Fear River, on the west by NC Highway 87, and on the north and
south by farmland.The site's location is shown in Figure 1.
E.I.du Pont de Nemours and Company(DuPont)purchased the property in parcels from several families in 1970.
The Site's first manufacturing area was constructed in the early 1970s.Currently,the Site manufactures plastic
sheeting, fluorochemicals, and intermediates for plastics manufacturing. A former manufacturing area, which
was sold in 1992, produced nylon strapping and elastomeric tape.
DuPont sold its Butacite® and SentryGlas® manufacturing units to Kuraray America Inc. in June 2014. In July
2015, DuPont separated its specialty chemicals business into a new publicly traded company named The
Chemours Company FC, LLC,as of July 1,2015.With this separation,Chemours became the owner of the entire
2,177 acres of the Fayetteville Works along with the Fluoromonomers, Nafion® membranes, and PPA
manufacturing units.The polyvinyl fluoride(PVF) resin manufacturing unit remained with DuPont.
In addition to the manufacturing operations,Chemours operates two natural gas-fired boilers and a wastewater
treatment plant(WWTP)for the treatment of DuPont and Kuraray process wastewater and sanitary wastewaters
from DuPont, Kuraray and Chemours.
ft
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November 2020
Page 5
.a - p., a.
N {''�''•,° t t\ k. li y e,f '1 X• +'" t f".+ !l t I A
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ley ` "�— .�: �_ '
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USGS Top.Clued prowled by NC DOT _
i _ .
WA ;� ,`, t Bladen County
PARSONS Ste Location Map UH 0w! AN1.ryd ft.,
NPDES Parma Appiicatron•Old Outfau 002
Chemours Fayettevate works Figure:
Fayettevdla.North Carolina Sp
Figure 1-Site Location Map
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4701 Hedgemore Drive•Charlotte,NC 28209
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Engineering Alternatives Analysis-Reverse Osmosis Permeate www.parsons.com
November 2020
Page 6
1
PROJECT SUMMARY
Chemours has installed an RO system as part of their manufacturing process. Permeate from the RO unit will
typically meet the site specification limits for demineralized water, allowing for its reuse in the manufacturing
process. The RO permeate may occasionally not meet the stringent demineralized water specification for
manufacturing reuse. The frequency of occurrence for not meeting the demineralized water specification is
unknown at this time.Chemours will continue to assess. When Chemours does not meet the demineralizer water
specifications,Chemours proposes to discharge the RO permeate to the Site WWTP for subsequent discharge to
Outfall 002 (see Alternative D below).A block flow diagram (BFD)of the RO system is presented in Figure 2.
PH
CoMuct ty
Chloride
L,� Ft,KrrMe
SUEZ EQUIPMENT TOC
PEF 1
SUEZ
FEED BREAK FRAC COUP
TANK SWRO TANK BWRO NUSAU?
RECYCLE
. OR
WwTP
Z HOLD TK 1
PEF2 n z CONE
SANE
rHl W
HOLD TK 2
PEF 3
1
.4_
' PEF 5
PEF 6
II
PEF 4
Figure 2 - RO System Flow Diagram
The RO Process Unit system consists of Reverse Osmosis(RO),Granular Activated Carbon(GAC),and Mixed Bed
Ion Exchange (MDI) to remove dissolved PFAS compounds and total dissolved solids (TDS) from the process
water currently collected in the Process Effluent Facility(PEF)Tanks.The goal of the RO Process unit is to produce
water that will meet the site specification limits for demineralized water that can be recycled back to the various
Monomers and IXM units or discharged through Outfall 002 via WWTP.
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The Chemours Company
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November 2020
Page 7
Influent Process Wastewater Components:
The following table shows a list of chemicals that may be present in the wastewater prior to the RO system.
Chemical Concentration
Water 75-100%
Potassium Carbonate 0-20%
Potassium Hydroxide 0-5%
Sodium Sulfate 0-4%
Potassium Fluoride 0 - 3%
Sodium Hydroxide 0 - 3%
Sodium Bisulfate 0-2%
Sodium Chloride 0-2%
Potassium Hydrogen Sulfate 0-2.5%
Sodium Fluoride 0-1%
Sodium Carbonate 0-1%
Potassium Nitrate 0-1%
Sodium Hypochlorite 0-1%
PFAS Compounds 0-2%
Aluminum Hydroxide 0 - 0.55%
Calcium Fluoride 0 - 0.2%
Hydrogen Peroxide 0 - 0.2%
Potassium Acetate 0-0.2%
Sodium Acetate 0-0.2%
Diethylene glycol 0 -0.1%
Dimethyl Sulfoxide 0-0.1%
Methanol 0-0.1%
Ethanol 0-0.015%
Acetonitrile 0-0.015%
Diglyme 0-0.015%
Methylene Chloride 0-0.015%
Toluene 0-0.015%
Table 1-Possible Chemicals in Influent Stream(pre-RO system)
The RO system uses an online conductivity meter to monitor the quality of this product stream and will have the
ability to recycle it, if needed.Chemours measures pH,conductivity,Chloride, Fluoride and Total Organic Carbon
(TOC) with online analysis as the Chemours HOLD tanks are filling. Chemours also analyzes the Composite
Sample for Calcium, Magnesium,Sodium, Potassium, pH and Conductivity at onsite labs.
Decision Tree for Recycling/Reuse in the facility is summarized below:
1. If all the specifications stated below are met, then the treated water can be recycled internally to the
Chemours process units. Blending with Powerhouse-supplied demineralized water can also be used to
meet specifications.
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Page 8
2. If all the specifications stated below are met with the exception of TOC,then the treated water may be
sent to the Thermal Oxidizer for use in all operations in the Thermal Oxidizer.The treated water will need
to be within the TOC specification which is being developed for the Thermal Oxidizer.
3. If all the specifications stated below are not met, including TOC,then the treated water will be sent to
the wastewater treatment plant for treatment prior to discharge as provided in the site's NPDES permit.
Analysis MAX MIN UNITS
Calcium + Magnesium: 0.02 ppm
Sodium: 10 ppm
Potassium: 10 ppm
Chloride 0.5 ppm
Fluoride 0.25 ppm
pH 7.5 5.5
Conductivity - lab 0.9 uS/cm
TOC 20 ppm
Table 2-Recycling Criteria for reuse of RO Permeate
STEP 1
ALLOWABILITY OF PROPOSED DISCHARGE
Chemours plans on reusing/recycling the RO permeate streams in their internal manufacturing process if the
demineralized specifications are met.When the permeate does not meet manufacturing requirements, it will be
treated at the Site WWTP and discharged through permitted Outfall 002.An aerial site plan showing the location
of the site in relation to the Cape Fear River,the RO system,the WWTP and current outfall 002 is shown in Figure
3.
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November 2020
Page 9
V',,t;;,-,: , - 1 filrii .
,
': Waal"'
t - -.
m •_r
�h
r a A
_ Pavement/Curb
y 'x Plant Border
1 "Ceeatii Drainage Channel
,,,Rrver
.'..Site Mixture
i.'§ a t l _i SWMU
. j I 17 ON ouu�ool
Icn..r uw,
t ( N
A
a
✓ 0 1,700 IC
Feet
Figure 3-Site Plan,RO System and WWTP Location
I
Applicability of the Local Government Review form (Attachment A per the EAA guidance document) and a
stepwise assessment for each potential restriction of the receiving body discussion per the EAA guidance
document is below.The DEQ EAA guidance is in italics, and a discussion follows:
Applicability of the Local Government Review
Per the EAA guidance document,the North Carolina General Statute 143-215.1(c)(6)allows input from
local governments in the issuance of NPDES Permits for non-municipal domestic wastewater treatment
facilities. As this facility is not a non-municipal domestic wastewater treatment facility, it has been
determined that the local government review form does not need to be completed.
1) EAA Guidance: Zero flow stream restrictions [15A NCAC 28.0206(d)(2)] apply to oxygen-consuming
waste in zero-flow streams. In order to determine streamflow at the proposed discharge location,
contact the U.S. Geological Survey at 919-571-4000.
EAA Guidance on Streamflow: Streamflow data, specially the low flow data of the receiving body is
required to support the EAA(7Q10, 30Q2,annual average streamflow).
The Cape Fear River will be the ultimate receiving body. Based on available data from the USGS at the
William 0 Huske Lock,the annual average streamflow at the location has been determined to be 4945
cubic feet per sec, and it has been confirmed that the Cape Fear River is not an intermittent body of
water.
When the permeate is not being recycled/reused for manufacturing,the ultimate receiving body for the
RO permeate,following treatment at the on-site WWTP is the Cape Fear River.The Cape Fear River is
a perennial river and a zero-flow discharge restriction is not be applicable to the Cape Fear River at this
' location. For reference,the hydrologic unit has been determined to be 03030005.
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November 2020
Page 10
2) EAA Guidance: Receiving stream classification restrictions [e.g., ORW, WS, SA, NSW, and HQ class
waters have various discharge restrictions or require stricter treatment standards]. Stream
classifications are available on the DWR Classification and Standards/Rule Review Branch website:
(http://portal.ncdenr.org/web/wq/ps/csu), while wastewater discharge restrictions for various stream
classifications are presented in state regulations I 15A NCAC 28.0200].
On reviewing publicly available resources such as the NC DEQ Surface Water Classifications maps, it
was determined that the classification of the Cape Fear River is WS-IV.
WS-IV are classified as waters used as sources of water supply for drinking,culinary,or food processing
purposes where a WS-I, II or III classification is not feasible.These waters are also protected for Class C
uses(fishable/swimmable).
When the permeate is not being recycled/reused for manufacturing, it will be treated in the on-site
WWTP. RO system volume of the near demineralized quality water is very small compared to the overall
Cape Fear River flow. Therefore, we anticipate that this discharge will not degrade the existing
classification of the receiving body.
The classification map showing the Cape Fear River in/around the site follows.
x
Surface water Claairacons:
:nde.: 18 26.25)
`'Area, CAPE FEAR RIPER
tunne
-tiurfpocn From a point ppoumauly 1 '.
mice apstream of Grays
Creek to apo a
appeAmately 0.5 mile
upstream of SmithR.d
Packing Company's;ntake
"act- WSW
_'ata of December 31.2008
�' ... Caoe sear
re
Figure 4-Receiving Stream Classification
3) EAA Guidance: Basin wide Water Quality Plans. These basin-specific plans list NPDES permitting
strategies that may limit wastewater discharges to particular streams within the basin due to lack of
stream assimilative capacity, etc. Basin plans are available on the DWR website, or you may contact
the DWR Basinwide Planning Branch(http://portal.ncdenr.org/web/wq/ps/bpu).
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Page 11
1
The latest version of the Cape Fear River basin wide water quality plan available is.from 2005 and has
been reviewed for references to stream assimilative capacity for the Cape Fear River section pertinent
to the discharge location of outfall 002.The sub-basin is the Lower Cape Fear.
We anticipate that the intermittent RO permeate discharge will have a very low oxygen demand and,as
such, will likely not lead to a significant Dissolved Oxygen (DO) sag or impact the river's assimilative
capacity due to its expected characteristics
The available sub-basin map follows.
2005 Cape Fear River Basinwide Water Quality Plan
i "'d ,� i,' „r✓x s f ,rf,
r
a
ti ,r ,r is
w&'� w
Subbasin information:
8-Digit HUC 03030005
(Subbasin):
Subbasin Name: Lower Cape Fear
Sq.Miles: 1,062� '
Acres: 717,748
River Basin: Cape Fear
\ .,,,.
.Zoom to
Figure 5-Sub-Basin Water Quality Plan
4) Impaired waters and TMDLs. Certain waterbodies listed as impaired on the 303(d)list and/or subject
to impending TMDLs may have wastewater discharge restrictions. The list of 303(d)impaired waters
is located on the DWR website, or you may contact the DWR Modeling and Assessment Branch
(htto://portal.ncdenr.org/web/wa/ps/mtu).
Based on the latest available 303 (d) list (2018 NC Category 5 Assessments "303(d) List" Final) the
pertinent water section of the Cape Fear River receiving the discharge, is not on the impaired list.This
was additionally confirmed against the latest available "Impaired Waters Map" from the DEQ:
"https://deq.nc.gov/about/divisions/energy-mi neral-land-resources/energy-mi neral-la nd-data/wsw-
m a ps-gi s-reso u rces".
The referenced impaired waters map showing the un-impaired Cape Fear River section including the
location of Outfall 002 is presented as follows:
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Page 12
NC 2012 integrated Report o
rL Leda a
a L.....-,..- o
J,y Neasta6S3i
- e G" % °r —h,c+:.eus
C ,. -- H S —y.•pa�q,�3Wlallat l5:
.. 2012JR Oftra,Ratlrq(M data)
i 20,2_w a«rt-Roos. 3cgay
La,,..s„„0 --
x
k
Nz,,, t
r . .i
an
Figure 6 - Impaired Waters Map
5) Presence of Endangered Species. If endangered species are present in the proposed discharge
location, there may be wastewater discharge restrictions. Endangered species information may be
included in the Basin wide Water Quality Plan, or you may contact the U.S. Fish and Wildlife Service
(919-856-4520), N.C. Wildlife Resources Commission (919-733-3633), or the N.C. Natural Heritage
Program(919-733-7701).
The basinwide water quality plan, maps provided by the Environmental Conservation Online System
(ECOS) of the U.S. Fish and Wildlife Service and the Information for Planning and Consultation (IPaC)
resource list from the U.S. Fish and Wildlife Service did not indicate the presence of any aquatic
endangered species in the pertinent area of the Cape Fear River and the Georgia and Willis creeks.
SCHEDULE
The RO system is currently installed and operational. The RO permeate is currently recycled/reused in the
manufacturing processes. If the permeate does not meet manufacturing specifications, it is currently shipped
offsite for disposal.
STEP 2
FLOW PROJECTION AND FLOW BASIS JUSTIFICATION
Flow projections have been based on material balance and estimated flows based on the design.The estimated
RO permeate flowrate is approximately 28,000 gpd.
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4701 Hedgemore Drive•Charlotte,NC 28209
The Chemours Company P:+1 704.529.62461 F:+1 704.529.0374
Engineering Alternatives Analysis-Reverse Osmosis Permeate www.parsons.com
November 2020
Page 13
STEP 3
TECHNOLOGICALLY FEASIBLE DISCHARGE ALTERNATIVES EVALUATION
Alternative A: Connection to Existing Treatment Plant
Conveying the off-specification RO permeate to a local Publicly Owned Treatment Works (POTW)was evaluated
in lieu of discharging the treated permeate from the RO system to the site WWTP discharging to Outfall 002.The
nearest POTW to the site is Fayetteville Public Works Commission (PWC) Rockfish Creek Water Reclamation
Facility located approximately nine miles north of the Chemours site. The Fayetteville PWC has previously
indicated that they will not accept water from the site associated with PFAS manufacturing. This has been
documented in Attachment A.
In addition, the Rockfish Creek Water Reclamation Facility, which uses biological treatment technology, is not
expected to provide any additional treatment for the permeate beyond the existing site WWTP. Furthermore,
given the distances involved, it would be unrealistic to convey a very low flow to the POTW when the same level
of treatment can be provided at the existing on-site WWTP.
Alternative B: Land Application Alternative Evaluation
As part of the EAA,the efficacy of land application alternatives(e.g.,infiltration galleries,spray irrigation,injection
wells, etc.) of off-specification RO permeate in lieu of discharging it to the site WWTP and, ultimately,to Outfall
002 was evaluated.
As previously discussed under the Project Summary section, the manufacturing process utilizes RO to create a
permeate that is typically reused in the manufacturing process. During temporary episodes the permeate may
not meet the stringent demineralized water manufacturing specification. During these temporary episodes it is
recommended that the off-specification permeate be managed in the on-site WWTP for ultimate discharge to
Outfall 002. This will be the most technically prudent and economically practicable alternative since existing
infrastructure in the form of the process sewer system and the WWTP already exists for management of the off-
specification permeate stream. Installing a new conveyance and land application system to manage this
intermittent, low volume off-specification permeate stream is not economically practicable and does not offer
any technical benefits.
Alternative C: RO Permeate Reuse in Facility
As previously discussed in detail under the Project Summary section,the RO permeate is currently being reused
in the manufacturing process. It is Chemours' intent to reuse as much of the RO permeate as possible.
Alternative D: Direct Discharge
This section discusses the treatment and discharge of the RO permeate at Outfall 002, following treatment at
the existing WWTP. As discussed under the Project Summary section and "Alternative C",the RO permeate will
be recycled for reuse within the manufacturing processes if demineralized water quality specifications are met.
Based on the "Decision Tree" discussed under the Project Summary section, the permeate will be sent to the
existing WWTP if one or more of the specifications listed under Table 2 are not met. Following treatment at the
WWTP,the permeate will be discharged at the current Outfall 002.A block flow diagram of the current WWTP is
provided below.
Parsons PLUS envision more 5M

4701 Hedgemore Drive•Charlotte,NC 28209
The Chemours Company P:+1 704.529.62461 F:+1704.529.0374
Engineering Alternatives Analysis-Reverse Osmosis Permeate www.parsons.com
November 2020
Page 14
Bo
Plant Domestic&Process [j/retention ( )-
) Tril
t
♦
�}--- Pre-Digester tank ,l
collection Sump Equation Basin` Aeration Tank i
`✓ comeited us
gical oxidation
�awdaxa ,
I
I 1 /
I
-r"'
I I
To Atmosphere scrubber
I I
i I
I I
DAr 1 Rotary t ruwn',: I
I I
Sludge
Track solid to landfill 1:3ni1n4 screw Presi Holding Tank Clarifier Tanks
Notes: Send Effluent to River
1.Equalization Basin level to be reduced to approximately 50%of full volume to target HRT of 24-48 hours
2.Pre-Digestion Tank level to be managed to target HRT of 18-36 hours
3.OAF and Rotary Drum not currently in use.
Figure 7 -Site WWTP PFD
Alternative E: Off-Site Disposal
This section discusses the off-site disposal of off-specification RO permeate by trucking this water off-site for
deep well injection in Texas. During temporary episodes the permeate may not meet the stringent demineralized
water manufacturing specification and will need to be discharged.The Site currently trucks this off-specification
permeate off-site, however, as there is existing infrastructure in the form of the Site WWTP to manage this
occasional low strength,low flow stream,this disposal option is economically and environmentally unsustainable
over an extended period of time.
Alternative F: Combination of Alternatives
As the default operation of the system is reuse/recycle of the RO permeate stream as a normal course of the
manufacturing process. In the event that the permeate does not meet the reuse specification is will be
discharged to the WWTP (i.e. Alternative C). As such, a combination of alternatives- would not be technically
preferential or economically practicable.
Parsons PLUS envision more 5M

4701 Hedgemore Drive•Charlotte,NC 28209
The Chemours Company P:+1 704.529.62461 F:+1704.529.0374
Engineering Alternatives Analysis-Reverse Osmosis Permeate www.parsons.com
November 2020
Page 15
STEP 4
ECONOMIC FEASABILITY OF ALTERNATIVES
The technically feasible options in terms of cost have been summarized as follows:
a) Land Application
b) Direct Discharge After Treatment in the WWTP: Direct discharge via the existing WWTP will not require
any major additional expenditure beyond installing a new pipeline from the RO system to a process
sewer connection in the vicinity of the Thermal Oxidizer.
c) RO Permeate Reuse: RO permeate reuse currently occurs in the process,and no additional
expenditure is required for this.
d) Off-Site Disposal
Cost information is preliminary and has been generated from the following sources:
• Non-binding vendor quotes;
• Previous project experience and bids;
• Cost estimation manuals(e.g. Means Construction Index)and standard factors.
Cost Summary Table
A summary cost table,which summarizes costs developed for technologically feasible wastewater alternatives
is provided in Table 3.
rea"men •'p`1 Total Total Capital Cost ( Total Capita►^Cost
30%) (+ 50%)
1 Land Application of Treated Effluent $750,000 $600,000 $1,130,000
Direct Discharge Only(Only includes
2 new pipeline) $100,000 $70,000 $150,000
3 Wastewater Reuse $0 $0 $0
4 Off-Site Disposal $33,000 $/day $24,000 $/day $50,000 $/day
Table 3-Cost Summary Table
CONCLUSION AND PATH FORWARD
In summary,the RO permeate will continue to be recycled internally to the Chemours process units as long as it
meets manufacturing demineralized water requirements. As noted previously, blending with existing
demineralized water can also be done to meet manufacturing requirements. If all the stringent manufacturing
specifications are not met for reuse, then the RO permeate water appears to be best suited to be sent to the
WWTP for treatment prior to discharge.The WWTP is an existing facility with a permitted outfall (Outfall 002).
Based on these factors, Chemours considers the intermittent discharge of off-specification manufacturing
process RO permeate in the on-site WWTP with subsequent discharge to the permitted 002 Outfall to be the
most technically feasible and environmentally beneficial management option. This evaluation is further
supported by the discussion in this EAA.
yea
Parsons PLUS envision more r

4701 Hedgemore Drive•Charlotte,NC 28209
P:+1704.529.62461 F:+1704.529.0374
www.parsons.com
ATTACHMENT A
Parsons PLUS envision more SM

From: Robinson,Michael
To: Joe Glass
Cc: Biniwale,Adway;Mick Noland;Chad Ham;Jamie West;Jeffery Brown(jbrown(alco.cumberland.nc.usl
Subject: RE:Sewer/POTW connection Near Chemours
Date: Monday,April 22,2019 8:49:14 AM
Joe,
Thank you so much for your assistance.
Michael Robinson, P.E.
Principal Environmental Engineer
PARSONS
4701 Hedgemore Drive•Charlotte, NC 28209
Phone—704.558.4255♦Mobile—704.576-7477
Michael.Robinson@Parsons,com,♦www.parsons.com
From:Joe Glass<[e-mail]>
Sent: Monday,April 22, 2019 8:34 AM
To: Robinson, Michael <[e-mail]>
Cc: Biniwale,Adway<[e-mail]>; Mick Noland <[e-mail]>;
Chad Ham <[e-mail]>;Jamie West<[e-mail]>;Jeffery Brown
([e-mail])<[e-mail]>
Subject: RE: Sewer/POTW connection Near Chemours
1. Is there someone else I should direct this question to? I will be the point of contact and will
coordinate with others at PWC that are necessary. My contact information is included.
2. Where is the nearest connection to Chemours? The nearest PWC sewer to the Chemours site
is approximately 6 miles to the north on Highway 87 near the intersection with Sandhills
Road. The nearest treatment facility is the PWC Rockfish Creek Water Reclamation Facility
and is approximately 9 miles north of the Chemours site at the intersection of Highway 87
and Old Wilmington Road.
3. Would you be able to take it? No, PWC will not accept the referenced wastewater. PWC's
Rockfish Creek Water Reclamation Facility is not designed to treat wastewater containing
HFPO-DA, PFMOAA and other PFAS
Joseph E. Glass, PE
Engineering Manager
Water Resources Engineering
Fayetteville Public Works Commission
955 Old Wilmington Road
Fayetteville, NC 28301
Office [phone]
Cell [phone]
Fax[phone]
[e-mail]

The information contained in this communication (including any attachment) is privileged and
confidential information that is intended for the sole use of the addressee. Access to this
communication by anyone else is unauthorized. If the reader is not the intended recipient, or an
employee or agent responsible for delivering this communication to the intended recipient,you are
hereby notified that any distribution or copying of this communication is strictly prohibited and may
be unlawful. If you have received this transmission in error, please reply and notify us of this error
and delete this message. Finally,the recipient should check this communication and any
attachments for the presence of viruses.The Public Works Commission of the City of Fayetteville,
NC, accepts no liability for any damage caused by any virus transmitted by this communication.
From: Robinson, Michael [mailto:Michael.Robinson(a�parsons.com]
Sent:Tuesday, April 09, 2019 3:19 PM
To: Joe Glass
Cc: Biniwale, Adway
Subject: RE: Sewer/ POTW connection Near Chemours
Joe,your help in answering the questions in my original email below would be appreciated. Thanks!
Michael Robinson, P.E.
Principal Environmental Engineer
pARSS©NS
4701 Hedgemore Drive♦Charlotte, NC 28209
Phone—704.558.4255♦ Mobile—704.576-7477
[e-mail]•www.parsons.com[linkprotect.cudasvc.coml
From:Jeffery Brown <jbrownPco.cumberland.nc.us>
Sent:Tuesday,April 9, 2019 11:28 AM
To: Robinson, Michael <Michael.RobinsonPparsons.com>
Cc: Biniwale,Adway<Adway.BiniwalePparsons.com>;Joe Glass<joe.glassPfaypwc.com>
Subject: RE: Sewer/POTW connection Near Chemours
Michael,
Cumberland County does not own and operate a wastewater treatment plant nor do we have
sanitary sewer in this area. You will need to direct your questions to Joe Glass at PWC for the
nearest sanitary sewer connection. I have copied him on my response back to you.
Jeffery P. Brown, PE
Engineering & Infrastructure Director
Cumberland County Engineering& Infrastructure Department
[phone]/[phone] Fax
jbrown(Jco.cumberland.nc.us
Cumberland
County,NC
Engineering&infrastructure

From: Robinson, Michael <Michael.Robinson(tparsons.com>
Sent:Tuesday,April 09, 2019 9:53 AM
To:Jeffery Brown <jbrownftco.cumberland.nc.us>
Cc: Biniwale, Adway<Adway.BiniwalePparsons.com>
Subject: Sewer/POTW connection Near Chemours
Good morning Mr. Brown. I left you a voice mail, but wanted to follow up with an email as well. As
part of the consent order at the Chemours Fayetteville Works, we are required to capture and treat
PFAS impacted water from a surface water body on-site. The water is groundwater that is
daylighting into the ditch and ultimately flowing to the CFR. In order to obtain an NPDES permit,we
have to get a letter from the local POTW indicating that they will not accept it. We are required to
remove 99%of two specific constituents (HFPO-DA and PFMOAA). As such the water would have a
maximum of 50 parts per trillion of HFPO-DA and around 800 ppt of PFMOAA (along with lower
levels of other PFAS constituents).
1. Is there someone else I should direct this question to?
2. Where is the nearest connection to Chemours?
3. Would you be able to take it?
Thanks!
Michael Robinson, P.E.
Principal Environmental Engineer
PARSONS
4701 Hedgemore Drive Charlotte, NC 28209
Phone—704.558.4255♦ Mobile—704,576-7477
[e-mail] a www.parsons.com[linkprotect.cudasvc.coml
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