NC0089915_Draft Permit_20200706

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MICHAEL S.REGAN I.
Secretary ` ouw
S.DANIEL SMITH NORTH CAROLINA
Director Environmental Quality
July 6,2020
Mr. Brian Long,Plant Manager
The Chemours Company
Fayetteville Works
22828 NC Highway 87 W
Fayetteville,North Carolina 28306
Subject: Draft NPDES Permit
Permit NC0089915
Fayetteville Works
Bladen County
Facility Physical-Chemical Grade II
Dear Mr. Long:
Enclosed with this letter is a copy of the draft permit for your facility. Please review this permit very
carefully to ensure thorough understanding of the conditions and requirements it contains.
Please provide any comments you have regarding the draft permit to this office by August 12,
2020. At this time, the Division is also publishing a notice in the newspapers of general circulation in
Bladen County,inviting public comment on the Draft Permit. Following the 30-day comment period,
we will review all pertinent comments received and take appropriate action on the permit.
If you have any questions about the NPDES permit process,please contact me at the following e-
mail address: sergei.chernikovnncdenr.gov,or telephone number: 919-707-3606.
Sincerely,
Sergei Chernikov,Ph.D.
Environmental Engineer III
Industrial NPDES Permitting Unit
cc: Central Files
NPDES Files
EPA Region IV(e-copy)
Fayetteville Regional Office/Water Quality(e-copy)
Fayetteville Regional Office/PWS (e-copy)
WSS/Aquatic Toxicology Unit(e-copy)
Q�� 512 NorthNorth Carolina DepartmentSalisburyStreet1 of1617 EnvironmentalMailServiceCenter I Raleigh.Quality I Division of WaterNorth ResourcesCarolina27699 1617
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STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
DRAFT NPDES PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful standards
and regulations promulgated and adopted by the North Carolina Environmental Management
Commission, and the Federal Water Pollution Control Act, as amended,
The Chemours Company FC, LLC
is hereby authorized to discharge treated wastewater and stormwater from a facility located at
Chemours Company- Fayetteville Works
22828 NC Highway 87 W
Fayetteville
Bladen County
to receiving waters designated as the Cape Fear River in the Cape Fear River Basin in accordance with
effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III, and IV
hereof.
The permit shall become effective Month DD, 20YY.
This permit and the authorization to discharge shall expire at midnight on Month DD, 20YY.
Signed this day Month DD, 20YY.
DRAFT
S. Daniel Smith, Director
Division of Water Resources
By Authority of the Environmental Management Commission

Permit NC0089915
SUPPLEMENT TO PERMIT COVER SHEET
The exclusive authority to operate and discharge from this facility arises under the permit conditions,
requirements, terms, and provisions included herein.
The Chemours Company FC, LLC
is hereby authorized to:
1. Operate a 1.58 MGD wastewater treatment facilities consisting of:
• influent oxidation, coagulation, and pH adjustment tank;
• dual booster pumps;
• dual ultrafiltration units;
• three granular activated carbon (GAC) adsorption units;
• sludge pump;
• polymer make down/injection system;
• in-line mixer and thickener unit;
• rotary fan press skid;
• return filtrate pump;
2. Discharge treated surface water, stormwater, and groundwater, including groundwater
from the existing Black Creek Aquifer monitoring wells, through Outfall 003 at the
location specified on the attached map into the Cape Fear River, a class C, WS-IV water
in the Cape Fear River Basin;
Page 2 of 12

Permit NC0089915
Part I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS—OUTFALL 003
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.] Facility Physical-Chemical Grade II
Beginning on the effective date of this permit and lasting through the expiration date,the Permittee is authorized to
discharge from Outfall 003 (treated surface water, groundwater, and stormwater) Such discharges shall be
limited and monitored by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
PARAMETER CHARACTERISTICS
Monthly Average Daily Maximum Measurement Sample Sample
Frequency Type Location'
Flow 50050 1.58 MGD Continuous Recording Effluent
Recording
Total Monthly Flow 82220 Monitor and Report(MG/mo) Monthly or Effluent
Calculation
Effluent,
Temperature(°C) 00010 See Note 2 Weekly Grab Upstream,
Downstream
BOD,5-day,20°C C0310 30.0 mg/L 45.0 mg/L Monthly Composite Effluent
TSS C0530 30.0 mg/L 45.0 mg/L Monthly Composite Effluent
Dissolved Oxygen,mg/L 00300 Weekly Grab Upstream,
Downstream
PMPA3,4 0.054 pg/L 0.054 pg/L Twice per month Grab Influent, Effluent
PMPA3,4 Monitor and Report(Ib/mo) Monthly Calculation Effluent
PMPA3,4 Monitor and Report(Ib/yr) Annually Calculation Effluent
HFPO-DA4 52612 0.06 pg/L 0.06 pg/L Twice per month Grab Influent,Effluent
HFPO-DA4 Monitor and Report(lb/mo) Monthly Calculation Effluent
HFPO-DA4 Monitor and Report(Ib/yr) Annually Calculation Effluent
PFMOAA4 52613 0.85 pg/L 0.85 pg/L Twice per month Grab Influent, Effluent
PFMOAA4 Monitor and Report(lb/mo) Monthly Calculation Effluent
PFMOAA4 Monitor and Report(Ib/yr) Annually Calculation Effluent
PFAS compounds,ng/L See A.(5.) Grab See A.(5.)
Total Phosphorus,mg/L C0665 Monthly Composite Effluent
Total Nitrogen,mg/L C0600 Monthly Composite Effluent
(NO2+NO3+TKN)
Conductivity 00094 Monthly Grab Upstream,
Downstream
Page 3 of 12

Permit NC0089915
EFFLUENT LIMITS MONITORING REQUIREMENTS
PARAMETER CHARACTERISTICS
Monthly Average Daily Maximum Measurement Sample Sample
Frequency Type Location1
Chronic Toxicity TGP3B See Note 5 Quarterly Composite Effluent
pH 00400 Between 6.0 and 9.0 Standard Units Weekly Grab Effluent
Mercury(Method 1631E),
ng/L COMER Quarterly Grab Effluent
Total Selenium 01147 Quarterly Composite Effluent
Total Silveri 01077 0.48 pg/L6 2.01 pg/L Monthly Composite Effluent
Total Cobalt? 01037 23.9 pg/L 23.9 pg/L Monthly Composite Effluent
Total Cadmium, pg/L 01027 Quarterly Composite Effluent
Total Copper, pg/L 01042 Quarterly Composite Effluent
Total Cyanide, pg/L 00720 Quarterly Composite Effluent
Total Lead, pg/L 01051 Quarterly Composite Effluent
Total Thallium, pg/L 01059 Quarterly Composite Effluent
Total Hardness[as CaCO3] 00900 Quarterly Composite Effluent
(mg/L)
Notes:
1. Upstream monitoring shall be at the Permittee's Cape Fear River Water Intake; downstream shall be at the
boat ramp approximately 4500 feet downstream at Prospect Hall Landing.
As a participant in the Middle Cape Fear River Basin Association,the instream monitoring requirements for
conventional parameters(DO, temperature, and conductivity)as stated above are waived. Should your
membership in the agreement be terminated,you shall notify the Division immediately and the instream
monitoring requirements specified in your permit shall be reinstated.
Influent—influent to the Old Outfall 002 Wastewater Treatment System. Note the Outfall 003 concentration
limitations do not apply to the influent. Influent sampling is required to calculate the HFPO-DA and
PFMOAA percent removal.
Effluent—Outfall 003 (effluent from the Old Outfall 002 Wastewater Treatment System).
2. The temperature of the effluent shall be such as not to cause an increase in the temperature of the receiving
stream of more than 2.8°C and in no case cause the ambient water temperature to exceed 32°C.
3. The requirement for 99% removal at the treatment system for PMPA shall not become effective until Jan. 31,
2021.The monitoring and reporting requirements for PMPA are effective immediately.
4. The Permittee shall remove indicator parameters HFPO-DA, PFMOAA, and PMPA at an efficiency of 99%in
order to reduce PFAS loading to the Cape Fear River. The effluent limits listed above are Technology Based
Effluent Limits ("TBELs") calculated to ensure a minimum of 99% removal efficiency. In addition to
complying with these effluent limits the Permittee must demonstrate compliance with the 99% removal
efficiency requirement by calculating monthly removal efficiency for HFPO-DA, PFMOAA, and PMPA
pursuant to condition A. (6.). The Permittee may request revision of the 99% removal efficiency requirement
upon a demonstration that influent concentrations of PFAS have been reduced to such a level that 99%removal
is no longer technically feasible. However, notwithstanding any such revision, Chemours shall continue to
operate the Treatment System at optimal efficiency.
Page 4 of 12

Permit NC0089915
5. Chronic Toxicity (Ceriodaphnia) P/F @ 12.5%; quarterly during February, May, August, November; see
condition A. (2.)of this permit.
6. Sufficiently sensitive test methods shall be used to analyze for Silver.The Division shall consider all effluent
Silver values reported below the PQL to be in compliance with the Monthly Average Silver limit.As of the
effective date of this permit,DWR recommends a target PQL of 1.0 µg/L for Silver.
7. After 12 months of sampling the facility can apply for a reduction in sampling if all the sampling results
demonstrate concentrations below detection levels. The facility shall be employing the sufficiently sensitive
test methods.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS.
The facility shall develop a Dam(collection system)Operation and Maintenance Plan(Plan)to ensure
maximum dry weather flow(610 gpm)in the channel is consistently captured and treated. Similar efforts
should be applied at the sumps/dams or other devices that will be used to capture water from the seeps.
The Plan should be provided to the DEQ within 30 days of the permit issuance for review and approval.
Upon approval,the Plan becomes an integral part of the permit.
The facility shall complete and submit EPA Form 2C for this Outfall within 180 days of commencement of
the discharge.
From time-to-time the Middle Cape Fear River has experienced flooding conditions which are documented to
cause a significant increase in water levels below Lock and Dam#3, consistent with the location of proposed
Outfall 003. During these events a backwater condition propagates upstream in the"Old Outfall 002
Stream". Historical observation indicates that the Old Outfall 002 Stream levels can rise significantly(consistent
with the flooded Cape Fear River levels)and would be expected,at times,to be equal to or significantly greater
than the invert elevation of the treatment system intake dam and associated pumping system. During these
flooded backwater conditions elevated sediment load and reduced flow velocity gradients are expected to cause
significant sediment deposition within the collection dam and pumping structure. The sediment load may cause
failure of the pumping and treatment system during the flooded backwater condition. Requirement for treatment
shall be suspended during these force majeure flooding events and be allowed 48 hours after the backwater stream
level falls below the invert of the intake collection dam to safely maintain the influent collection structure and re-
initiate collection and treatment. The triggering Cape Fear River flood elevations; event documentation and
notification requirements; and procedure for treatment cessation and safe restart shall be included in the approved
Dam Operation and Maintenance Plan.
A. (2.) CHRONIC TOXICITY PERMIT LIMIT P/F(QUARTERLY)—OUTFALL 003
[15A NCAC 02B.0200]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 12.5%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the"North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure,"(Revised December 2010,or subsequent versions)
or"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"(Revised December 2010,or
subsequent versions).The tests will be performed during the months of February,May,August,and
November.These months signify the first month of each three-month toxicity testing quarter assigned to the
facility.Effluent sampling for this testing must be obtained during representative effluent discharge and shall be
performed at the NPDES permitted final effluent discharge below all treatment processes.
Page 5 of 12

Permit NC0089915
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the
permit limit,then multiple-concentration testing shall be performed at a minimum,in each of the two
following months as described in"North Carolina Phase II Chronic Whole Effluent Toxicity Test
Procedure"(Revised-December 2010,or subsequent versions).
All toxicity testing results required as part of this permit condition will be entered electronically using the
Division's eDMR system for the months in which tests were performed,using the parameter code TGP3B for the
pass/fail results and THP3B for the Chronic Value.Additionally,DWR Form AT-3 (original)is to be sent to the
following address:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh,NC 27699-1621
Or,results can be sent to the email,[e-mail].
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30 days after
the end of the reporting period for which the report is made.
Test data shall be complete,accurate, include all supporting chemical/physical measurements and all
concentration/response data,and be certified by laboratory supervisor and ORC or approved designate signature.
Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required,
the permittee will complete the information located at the top of the aquatic toxicity(AT)test form indicating the
facility name,permit number,pipe number,county,and the month/year of the report with the notation of"No
Flow"in the comment area of the form.The report shall be submitted to the Water Sciences Section at the address
cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required,monitoring will be
required during the following month.Assessment of toxicity compliance is based on the toxicity testing quarter,
which is the three-month time interval that begins on the first day of the month in which toxicity testing is
required by this permit and continues until the final day of the third month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water
Resources indicate potential impacts to the receiving stream,this permit may be re-opened and modified to
include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism
survival,minimum control organism reproduction,and appropriate environmental controls, shall constitute an
invalid test and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring.
A. (3.) RE-OPENER CONDITION
[NCGS 143-215.3(a)(2)and NCGS 143-215.66]
This permit shall be modified, or revoked and reissued to incorporate additional limitations and monitoring
requirements in the event toxicity testing or other studies indicate that detrimental effects may be expected as a
result of this discharge. Additionally, and if appropriate, after 3 years of treatment system operation the division
will evaluate effluent limits and adjust the limits if the analysis indicates an improved performance.
Page 6 of 12

Permit NC0089915
A. (4.)ELECTRONIC REPORTING OF MONITORING REPORTS
[G.S. 143-215.1(b)]
Federal regulations require electronic submittal of all discharge monitoring reports(DMRs)and program reports.
The final NPDES Electronic Reporting Rule was adopted and became effective on December 21,2015.
NOTE: This special condition supplements or supersedes the following sections within Part II of this permit
(Standard Conditions for NPDES Permits):
• Section B.(11.) Signatory Requirements
• Section D.(2.) Reporting
• Section D.(6.) Records Retention
• Section E. (5.) Monitoring Reports
1. Reportini Requirements [Supersedes Section D.(2.)and Section E.(5.)(a)1
The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic
Discharge Monitoring Report(eDMR)intemet application.
Monitoring results obtained during the previous month(s)shall be summarized for each month and submitted
electronically using eDMR. The eDMR system allows permitted facilities to enter monitoring data and
submit DMRs electronically using the intemet. The eDMR system may be accessed at:
https://deq.nc.gov/about(divisions/water-resources/edmr.
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility being
physically located in an area where less than 10 percent of the households have broadband access,then a
temporary waiver from the NPDES electronic reporting requirements may be granted and discharge
monitoring data may be submitted on paper DMR forms(MR 1, 1.1,2, 3)or alternative forms approved by
the Director. Duplicate signed copies shall be submitted to the following address:
NC DEQ/Division of Water Resources/Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
See"How to Request a Waiver from Electronic Reporting"section below.
Regardless of the submission method,the first DMR is due on the last day of the month following the
issuance of the permit or in the case of a new facility,on the last day of the month following the
commencement of discharge.
Starting on December 21,2020,the permittee must electronically report the following compliance
monitoring data and reports,when applicable:
• Sewer Overflow/Bypass Event Reports; (This does not include the flow of waters over the dam of 00F2
drainage waters from water treatment due to wet weather events causing 00F2 drainage flow rates to be
above dry weather flows.)
• Pretreatment Program Annual Reports; and
Page 7 of 12

Permit NC0089915
• Clean Water Act(CWA) Section 316(b)Annual Reports.
The permittee may seek an electronic reporting waiver from the Division(see"How to Request a Waiver
from Electronic Reporting"section below).
2. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9),the permittee must identify the initial recipient at the time of each
electronic submission. The permittee should use the EPA's website resources to identify the initial recipient
for the electronic submission.
Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity(EPA or
the state authorized by EPA to implement the NPDES program)that is the designated entity for receiving
electronic NPDES data[see 40 CFR 127.2(b)].
EPA plans to establish a website that will also link to the appropriate electronic reporting tool for each type of
electronic submission and for each state. Instructions on how to access and use the appropriate electronic
reporting tool will be available as well. Information on EPA's NPDES Electronic Reporting Rule is found at:
https://www.federalregister.gov/documents/2015/10/22/2015-24954/national-pollutant-discharge-elimination-
system-npdes-electronic-reporting-rule
Electronic submissions must start by the dates listed in the"Reporting Requirements"section above.
3. How to Request a Waiver from Electronic Reporting
•
The permittee may seek a temporary electronic reporting waiver from the Division. To obtain an electronic
reporting waiver,a permittee must first submit an electronic reporting waiver request to the Division.
Requests for temporary electronic reporting waivers must be submitted in writing to the Division for written
approval at least sixty(60)days prior to the date the facility would be required under this permit to begin
submitting monitoring data and reports. The duration of a temporary waiver shall not exceed 5 years and
shall thereupon expire. At such time, monitoring data and reports shall be submitted electronically to the
Division unless the permittee re-applies for and is granted a new temporary electronic reporting waiver by the
Division. Approved electronic reporting waivers are not transferrable. Only permittees with an approved
reporting waiver request may submit monitoring data and reports on paper to the Division for the period that
the approved reporting waiver request is effective.
Information on eDMR and the application for a temporary electronic reporting waiver are found on the
following web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
4. Sianatory Requirements (Supplements Section B.(11.)(b)and Supersedes Section B.(11.)(d)l
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II, Section
B.(11.)(a)or by a duly authorized representative of that person as described in Part II, Section B. (11.)(b). A
person,and not a position,must be delegated signatory authority for eDMR reporting purposes.
For eDMR submissions,the person signing and submitting the DMR must obtain an eDMR user account and
login credentials to access the eDMR system. For more information on North Carolina's eDMR system,
registering for eDMR and obtaining an eDMR user account,please visit the following web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
Page 8 of 12

Permit NC0089915
Certification. Any person submitting an electronic DMR using the state's eDMR system shall make the
following certification[40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION WILL BE
ACCEPTED:
"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 fines and imprisonment for knowing violations."
5. Records Retention (Supplements Section D. (6.11
The permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions. These
records or copies shall be maintained for a period of at least 3 years from the date of the report. This period
may be extended by request of the Director at any time [40 CFR 122.41].
A. (5.) PFAS MONITORING REQUREMENTS AND ANALYTICAL METHODS
[NCGS 143-215.3 (a)(2)and NCGS 143-215.66]
The permittee shall monitor for PFAS compounds at the monitoring frequencies described below. The
lists of compounds follow.Note that not all required compounds have eDMR parameter codes.Those with
parameter codes should be reported using the applicable codes, and all other results for PFAS compounds
should be reported in the comment section of the eDMR or added as supplemental information.In addition
to other data reporting requirements a complete copy of all PFAS sampling results shall be submitted to
NPDES Permitting via email at svc deq [e-mail], with the Facility permit number and
name in the Subject heading, at the same time eDMR data is due; and
The Permittee shall use the following analytical methods when testing for the PFAS compounds.
Method description: Approved methods and SOPs referred to as"EPA 537 Modified"and"Table 3"
should be used as described in supporting material and approved by DEQ Division of Waste
Management in a letter dated May 8th 2019. For this permit, Eurofins Lancaster and Eurofins Test
America should use these same approved methods and update all method revisions with the referenced
methods for consistency across all work projects for Chemours Company Fayetteville Works.
Monitoring Locations and Frequency
Location Compounds Frequency
Upstream at the Permittee's Cape Table 3+Lab SOP Monthly
Fear River Water Intake Full Suite (Table 3+ Lab SOP Quarterly
and EPA Method 537 Mod)
Influent to the Treatment System Table 3+Lab SOP Monthly
Full suite (Table 3+ Lab SOP Quarterly
and EPA Method 537 Mod)
Page 9 of 12

Permit NC0089915
Outfall 003 (effluent from the Table 3+ Lab SOP Monthly
Treatment System) Full suite (Table 3+ Lab SOP Quarterly
and EPA Method 537 Mod)
Downstream Table 3+ Lab SOP Monthly
The boat ramp approximately Full Suite (Table 3+ Lab SOP Quarterly
4500 feet downstream at Prospect and EPA Method 537 Mod)
Hall Landing.
PFAS Compounds: Full Suite=Table 3+ Lab SOP+Method 537 Modified Compounds:
Analytical Common Chemical Name CASN Chemical Parameter
Method Name Formula code
HFPO-DA Hexafluoropropylene oxide 13252-13-6 C6HF1103 52612
dimer acid
PEPA Perlfuoroethoxypropyl 26729-61-2 C5HF903 52618
carboxylic acid
PFECA-G Perfluoro-4-isopropoxybutanoic 801212-59-9 C12H9F903S 52619
acid
PFMOAA Perfluoro-2-methoxyacetic acid 674-13-5 C3HF503 52613
PFO2HxA Perfluoro(3,5-dioxahexanoic) 39492-88-1 C4HF704 52617
acid
PFO3OA Perfluoro(3,5,7-trioxaoctanoic) 39492-89-2 C5HF905 52616
acid
PFO4DA Perfluoro(3,5,7,9- 39492-90-5 C6HF1106 52615
tetraoxadecanoic)acid
PMPA Perfluoromethoxypropyl 13140-29-9 C4HF703 52620
carboxylic acid
Table 3+ Hydro-EVE Perfluoroethoxypropanoic acid 773804-62-9 C8H2F1404 52621
Lab SOP Acid
EVE Acid Perfluoroethoxypropionic acid 69087-46-3 C8HF1304 52622
PFECA-B Perfluoror-3,6-dioxaheptanoic 151772-58-6 C5HF904 52626
acid
R-EVE R-EVE N/A C8H2F1205 52640
PFO5DA Perfluoro-3,5,7,9,11- 39492-91-6 C7HF1307 52627
pentaoxadodecanoic acid
Byproduct 4 Byproduct 4 N/A C7H2F1206S 52643
Byproduct 5 Byproduct 5 N/A C7H3F1107S 52644
Byproduct 6 Byproduct 6 N/A C6H2F1204S 52645
NVHOS Perfluoroethoxysulfonic acid 1132933-86- C4H2F804S 52628
86-8
PES Perfluoroethoxyethanesulfonic 113507-82-7 C4HF904S 52629
acid
PFESA-BP1 Byproduct 1 29311-67-9 C7HF13O5S 52630
PFESA-BP2 Byproduct 2 749836-20-2 C7H2F1405S 52614
DFSA DFSA 422-67-3 C2H2F205S
Table 3+ MMF MMF 1514-85-8 C3H2F204
Lab SOP MTP MTP 93449-21-9 C4H4F403
PPF Acid PPF Acid 422-64-0 C3HF502
Page 10 of 12

Permit NC0089915
PFBA Perfluorobutanoic acid 375-22-4 C4HF702 51522
PFDA Perfluorodecanoic acid 335-76-2 C1OHF1902 51627
PFDoA Perfluorododecanoic acid 307-55-1 C12HF2302 51629
PFHpA Perfluoroheptanoic acid 375-85-9 C7HF1302 51625
PFNA Perfluorononanoic acid 375-95-1 C9HF1702 51626
PFOA Perfluorooctanoic acid 335-67-1 C8HF15O 51521
PFHxA Perfluorohexanoic acid 307-24-4 C6HF11O2 51624
PFPeA Perfluoropentanoic acid 2706-90-3 C5HF902 51623
PFTeA Perfluorotetradecanoic acid 376-06-7 Cl4HF2702 51531
PFTriA Perfluorotridecanoic acid 72629-94-8 C l3HF2502 51630
PFUnA Perfluoroundecanoic acid 2058-94-8 Cl1HF2102 51628
PFBS Perfluorobutanesulfonic acid 375-73-5 C4HF9SO 52602
PFDS Perfluorodecanesulfonic acid 335-77-3 CIOHF2103S 52603
PFHpS Perfluoroheptanesulfonic acid 375-92-8 C7HF15O3S 52604
PFHxS Perfluorohexanesulfonic acid 355-46-4 C6HF13SO3 52605
PFNS Perfluorononanesulfonic acid 68259-12-1 C9HF19O3S 52611
EPA PFOS Perfluorooctanesulfonic acid 1763-23-1 C8HF17SO3 52606
Method PFPeS Perfluoropentanesulfonic acid 2706-91-4 C5HF1103S 52610
537 Mod 10:2 FTS 10:2 fluorotelomersulfonic acid 120226-60-0 C12H5F2103 52631
4:2 FTS 4:2 fluorotelomersulfonic acid 757124-72-4 C6H5F903S 52607
6:2 FTS 6:2 fluorotelomersulfonic acid 27619-97-2 C8H5F13S03 52608
8:2 FTS 8:2 fluorotelomersulfonic acid 39108-34-4 C1OH5F1703S 52609
NEtFOSAA NEtFOSAA 2991-50-6 C12H8F17NO4S 51643
NEtPFOSA NEtPFOSA 4151-50-2 ClOH6F17NO2S 52642
NEtPFOSAE NEtPFOSAE 1691-99-2 C12H10F17NO3S 51641
NMeFOSAA NMeFOSAA 2355-31-9 Cl1H6F17NO4S 51644
NMePFOSA NMePFOSA 31506-32-8 C9H4F17NO2S 52641
NMePFOSAE NMePFOSAE 24448-09-7 C11H8F17NO3S 51642
PFDOS Perfluorododecanesulfonic acid 79780-39-5 C12HF2503S , 52632
PFHxDA Perfluorohexadecanoic acid 67905-19-5 Cl6HF3102 52633
PFODA Perfluorooctadecanoic acid 16517-11-6 Cl8HF3502 52634
PFOSA Perfluorooctanesulfonamide 754-91-6 C8H2F17NO2S 51525
F-53B Major F-53B Major 73606-19-6 C8HC1F16O4S 52638
F-53B Minor F-53B Minor 83329-89-9 C1OHC1F2004S 52639
ADONA 4,8-Dioxa-3H-perfluorononanoic 919005-14-4 C7H2F1204 52636
acid
A. (6.) CALCULATION OF HFPO-DA, PFMOAA, & PMPA REMOVAL/LOADS
a. The Permittee shall calculate monthly removal efficiency for HFPO-DA, PFMOAA and PMPA as
follows:
Influent-Effluent
%Removal =
Influent
Where:
Influent=monthly average influent concentration
Effluent=monthly average effluent concentration
b. The Permittee shall calculate monthly load for HFPO-DA, PFMOAA, and PMPA as follows:
Monthly C Load = C x TMF x 8.34
Page 11 of 12

Permit NC0089915
Where:
C =monthly average concentration for each compound (mg/L)
TMF =Total Monthly Flow of wastewater discharged during the month(MG/month)
8.34= conversion factor from (mg/L x MG) to pounds
Annual C Load = Sum of the 12 Monthly Loads for each compound for the calendar year
c. The Permittee shall report monthly HFPO-DA, PFMOAA, and PMPA results [% removal (ng/L), and
Loading(pounds/month)] in the discharge monitoring report for each month and shall report each calendar
year's Annual Load (pounds/year) with the December report for that year. Percent removal shall be listed
in the comment section of the eDMR since it has no parameter code. The requirement for 99%removal at
the treatment system for PMPA shall not become effective until Jan. 31, 2021.
In addition, calculations shall be submitted electronically with all PFAS data to NPDES Permitting via
email at svc_deq [e-mail], with the Facility permit number and name in the Subject
heading.
This percent removal will be reported monthly with Chemours electronic Discharge Monitoring Report
(eDMR) data. If the influent HFPO-DA or PFMOAA concentrations to the water treatment system are
equal to or less than 200 ng/L and 500 ng/L, respectively, then the water treatment system effluent
concentrations of less than the current reporting limits (2 ng/L and 5 ng/L, respectively) shall be
considered as achieving 99%removal.
Page 12 of 12

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Chemours- NC0089915AI Facility
Location •
USGS Quad Name: Duart Lat.: 34°49'53"
Receiving Stream: Cape Fear River Long.: 78°49'23" „
Stream Class: C, WS-IV
Subbasin: Cape Fear- 030616 North Not to SCALE