2020.09.18_CCO.p10_FinalNPDESPermit89915

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES

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 September 30, 2020.

This permit and the authorization to discharge shall expire at midnight on September 29, 2025.

Signed this day September 18, 2020.

S. Daniel Smith, Director
Division of Water Resources
By Authority of the Environmental Management Commission

for
Permit NC0089915
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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, treated filter backwash, 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
WS-IV water in the Cape Fear River Basin;

Permit NC0089915
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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 [15A NCAC 8G .0306]

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:

PARAMETER CHARACTERISTICS

EFFLUENT LIMITS MONITORING REQUIREMENTS
Monthly Average Daily Maximum Measurement
Frequency
Sample
Type
Sample
Location1
Flow 50050 1.58 MGD Continuous Recording Effluent
Total Monthly Flow 82220 Monitor and Report (MG/mo) Monthly
Recording
or
Calculation
Effluent
Temperature (°C) 00010 See Note 2 Weekly Grab
Effluent,
Upstream,
Downstream
BOD, 5-day, 20°C CO310 30.0 mg/L 45.0 mg/L Monthly Composite Effluent
TSS CO530 30.0 mg/L 45.0 mg/L Monthly Composite Effluent
Dissolved Oxygen, mg/L 00300 Weekly Grab Upstream,
Downstream
PMPA3,4 0.054 µg/L 0.054 µg /L Twice per month Grab Influent, Effluent
PMPA3,4 Monitor and Report (lb/mo) Monthly Calculation Effluent
PMPA3,4 Monitor and Report (lb/yr) Annually Calculation Effluent
HFPO-DA4 52612 0.06 µg/L 0.06 µg /L Twice per month Grab Influent, Effluent
HFPO-DA4 Monitor and Report (lb/mo) Monthly Calculation Effluent
HFPO-DA4 Monitor and Report (lb/yr) Annually Calculation Effluent
PFMOAA4 52613 0.85 µg/L 0.85 µg/L Twice per month Grab Influent, Effluent
PFMOAA4 Monitor and Report (lb/mo) Monthly Calculation Effluent
PFMOAA4 Monitor and Report (lb/yr) Annually Calculation Effluent
PFAS compounds, ng/L See A. (5.) Grab See A. (5.)
Total Phosphorus, mg/L CO665 Monthly Composite Effluent
Total Nitrogen, mg/L
(NO2+NO3+TKN) CO600 Monthly Composite Effluent
Permit NC0089915
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PARAMETER CHARACTERISTICS

EFFLUENT LIMITS MONITORING REQUIREMENTS
Monthly Average Daily Maximum Measurement
Frequency
Sample
Type
Sample
Location1
Conductivity 00094 Monthly Grab Upstream,
Downstream
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 Silver7 01077 0.48 µg/L6 2.01 µg/L Monthly Composite Effluent
Total Cobalt7 01037 23.9 µg/L 23.9 µg/L Monthly Composite Effluent
Total Cadmium, µg/L 01027 Quarterly Composite Effluent
Total Copper, µg/L 01042 Quarterly Composite Effluent
Total Cyanide, µg/L 00720 Quarterly Composite Effluent
Total Lead, µg/L 01051 Quarterly Composite Effluent
Total Thallium, µg/L 01059 Quarterly Composite Effluent
Total Hardness [as CaCO3]
(mg/L) 00900 Quarterly Composite
Grab
Effluent
Upstream8
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
Permit NC0089915
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is no longer technically feasible. However, notwithstanding any such revision, Chemours shall continue to
operate the Treatment System at optimal efficiency.
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.
8. The permittee shall sample instream hardness upstream of the facility’s discharge. The sample shall be
representative of the hardness in the stream. If the permittee is a member of the Monitoring Coalition Program,
sampling for instream hardness may be waived as long as the Monitoring Coalition agrees to sample hardness
at the nearest upstream location, at a minimum frequency of quarterly, and the permittee has obtained approval
from DWR -NPDES Permitting Unit that the upstream station being monitored by the coalition is representative
of the receiving stream for this discharge. The permittee is responsible for submitting instream hardness test
results with its DMRs as results are received from the coalition. If coalition membership is cancelled or the
Monitoring Coalition terminates instream hardness sampling at the approved station, the permittee will
immediately notify the Division and resume sampling for instream hardness, upstream of its discharge, as
required in Section A. (1.).

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
shall be applied at the sumps/dams or other devices that will be used to capture water from the seeps.

The Plan shall be provided to the DEQ no later than October 18, 2020 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 no later than March 30, 2021.

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. Whenever treatment is suspended under this condition, the permittee shall
document the flooding in the DMR for that month including the time of flooding above the intake invert, when
the water recedes below the intake invert, and time that treatment resumes.

Permit NC0089915
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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.
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.
Permit NC0089915
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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.

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. Reporting Requirements [Supersedes Section D. (2.) and Section E. (5.) (a)]
The permittee shall report discharge monitoring data electronically using the NC DWR’s Electronic
Discharge Monitoring Report (eDMR) internet 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 internet. 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

Permit NC0089915
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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 OOF2
drainage waters from water treatment due to wet weather events causing OOF2 drainage flow rates to be
above dry weather flows.)
• Pretreatment Program Annual Reports; and
• 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(l)(9), the permittee must identify the initial recipient at the time of each
electronic submission. The permittee shall 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:

Permit NC0089915
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http://deq.nc.gov/about/divisions/water-resources/edmr

4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)]
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

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.)]
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 shall be reported using the applicable codes, and all other results for PFAS compounds
shall 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 [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”
shall 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 shall use
Permit NC0089915
Page 10 of 12

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
Fear River Water Intake
Table 3+ Lab SOP Monthly
Full Suite (Table 3+ Lab SOP
and EPA Method 537 Mod)
Quarterly
Influent to the Treatment System Table 3+ Lab SOP Monthly
Full suite (Table 3+ Lab SOP
and EPA Method 537 Mod)
Quarterly
Outfall 003 (effluent from the
Treatment System)
Table 3+ Lab SOP Monthly
Full suite (Table 3+ Lab SOP
and EPA Method 537 Mod)
Quarterly
Downstream
The boat ramp approximately
4500 feet downstream at Prospect
Hall Landing.

Table 3+ Lab SOP Monthly
Full Suite (Table 3+ Lab SOP
and EPA Method 537 Mod)
Quarterly

PFAS Compounds: Full Suite = Table 3+ Lab SOP + Method 537 Modified Compounds:

Analytical
Method
Common
Name
Chemical Name CASN Chemical
Formula
Parameter
code
Table 3+
Lab SOP
HFPO-DA Hexafluoropropylene oxide
dimer acid
13252-13-6 C6HF11O3 52612
PEPA Perlfuoroethoxypropyl
carboxylic acid
26729-61-2 C5HF9O3 52618
PFECA-G Perfluoro-4-isopropoxybutanoic
acid
801212-59-9 C12H9F9O3S 52619
PFMOAA Perfluoro-2-methoxyacetic acid 674-13-5 C3HF5O3 52613
PFO2HxA Perfluoro(3,5-dioxahexanoic)
acid
39492-88-1 C4HF7O4 52617
PFO3OA Perfluoro(3,5,7-trioxaoctanoic)
acid
39492-89-2 C5HF9O5 52616
PFO4DA Perfluoro(3,5,7,9-
tetraoxadecanoic) acid
39492-90-5 C6HF11O6 52615
PMPA Perfluoromethoxypropyl
carboxylic acid
13140-29-9 C4HF7O3 52620
Hydro-EVE
Acid
Perfluoroethoxypropanoic acid 773804-62-9 C8H2F14O4 52621
EVE Acid Perfluoroethoxypropionic acid 69087-46-3 C8HF13O4 52622
PFECA-B Perfluoror-3,6-dioxaheptanoic
acid
151772-58-6 C5HF9O4 52626
R-EVE R-EVE N/A C8H2F12O5 52640
Permit NC0089915
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PFO5DA Perfluoro-3,5,7,9,11-
pentaoxadodecanoic acid
39492-91-6 C7HF13O7 52627
Byproduct 4 Byproduct 4 N/A C7H2F12O6S 52643
Byproduct 5 Byproduct 5 N/A C7H3F11O7S 52644
Byproduct 6 Byproduct 6 N/A C6H2F12O4S 52645
NVHOS Perfluoroethoxysulfonic acid 1132933-86-
86-8
C4H2F8O4S 52628
PES Perfluoroethoxyethanesulfonic
acid
113507-82-7 C4HF9O4S 52629
PFESA-BP1 Byproduct 1 29311-67-9 C7HF13O5S 52630
PFESA-BP2 Byproduct 2 749836-20-2 C7H2F14O5S 52614
Table 3+
Lab SOP
DFSA1 DFSA 422-67-3 C2H2F2O5S
MMF1 MMF 1514-85-8 C3H2F2O4
MTP1 MTP 93449-21-9 C4H4F4O3
PPF Acid1 PPF Acid 422-64-0 C3HF5O2
EPA
Method
537 Mod
PFBA Perfluorobutanoic acid 375-22-4 C4HF7O2 51522
PFDA Perfluorodecanoic acid 335-76-2 C10HF19O2 51627
PFDoA Perfluorododecanoic acid 307-55-1 C12HF23O2 51629
PFHpA Perfluoroheptanoic acid 375-85-9 C7HF13O2 51625
PFNA Perfluorononanoic acid 375-95-1 C9HF17O2 51626
PFOA Perfluorooctanoic acid 335-67-1 C8HF15O 51521
PFHxA Perfluorohexanoic acid 307-24-4 C6HF11O2 51624
PFPeA Perfluoropentanoic acid 2706-90-3 C5HF9O2 51623
PFTeA Perfluorotetradecanoic acid 376-06-7 C14HF27O2 51531
PFTriA Perfluorotridecanoic acid 72629-94-8 C13HF25O2 51630
PFUnA Perfluoroundecanoic acid 2058-94-8 C11HF21O2 51628
PFBS Perfluorobutanesulfonic acid 375-73-5 C4HF9SO 52602
PFDS Perfluorodecanesulfonic acid 335-77-3 C10HF21O3S 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
PFOS Perfluorooctanesulfonic acid 1763-23-1 C8HF17SO3 52606
PFPeS Perfluoropentanesulfonic acid 2706-91-4 C5HF11O3S 52610
10:2 FTS 10:2 fluorotelomersulfonic acid 120226-60-0 C12H5F21O3 52631
4:2 FTS 4:2 fluorotelomersulfonic acid 757124-72-4 C6H5F9O3S 52607
6:2 FTS 6:2 fluorotelomersulfonic acid 27619-97-2 C8H5F13SO3 52608
8:2 FTS 8:2 fluorotelomersulfonic acid 39108-34-4 C10H5F17O3S 52609
NEtFOSAA NEtFOSAA 2991-50-6 C12H8F17NO4S 51643
NEtPFOSA NEtPFOSA 4151-50-2 C10H6F17NO2S 52642
NEtPFOSAE NEtPFOSAE 1691-99-2 C12H10F17NO3S 51641
NMeFOSAA NMeFOSAA 2355-31-9 C11H6F17NO4S 51644
NMePFOSA NMePFOSA 31506-32-8 C9H4F17NO2S 52641
NMePFOSAE NMePFOSAE 24448-09-7 C11H8F17NO3S 51642
PFDOS Perfluorododecanesulfonic acid 79780-39-5 C12HF25O3S 52632
PFHxDA Perfluorohexadecanoic acid 67905-19-5 C16HF31O2 52633
PFODA Perfluorooctadecanoic acid 16517-11-6 C18HF35O2 52634
PFOSA Perfluorooctanesulfonamide 754-91-6 C8H2F17NO2S 51525
F-53B Major F-53B Major 73606-19-6 C8HClF16O4S 52638
F-53B Minor F-53B Minor 83329-89-9 C10HClF20O4S 52639
ADONA 4,8-Dioxa-3H-perfluorononanoic
acid
919005-14-4 C7H2F12O4

52636
Permit NC0089915
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Notes:
1. Monitoring for the compound is suspended until an appropriate testing methodology is established.
The facility will be notified by DWR when monitoring shall begin.

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:

% 𝑅𝑐𝑙𝑙𝑟𝑎𝑙= 𝐼𝑛𝑒𝑙𝑡𝑒𝑛𝑡−𝐸𝑒𝑒𝑙𝑡𝑒𝑛𝑡
𝐼𝑛𝑒𝑙𝑡𝑒𝑛𝑡
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:
𝐿𝑙𝑙𝑟ℎ𝑙𝑥 𝐶 𝐿𝑙𝑎𝑐=𝐶 𝑥 𝑅𝐿𝐹 𝑥 8.34

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

𝐴𝑙𝑙𝑟𝑎𝑙 𝐶 𝐿𝑙𝑎𝑐=𝑅𝑟𝑙 𝑙𝑐 𝑟ℎ𝑐 12 𝐿𝑙𝑙𝑟ℎ𝑙𝑥 𝐿𝑙𝑎𝑐𝑟 𝑐𝑙𝑟 𝑐𝑎𝑐ℎ 𝑐𝑙𝑙𝑙𝑙𝑟𝑙𝑐 𝑐𝑙𝑟 𝑟ℎ𝑐 𝑐𝑎𝑙𝑐𝑙𝑐𝑎𝑟 𝑥𝑐𝑎𝑟

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 [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.