NC0024911_Draft Permit_20240122

ROY COOPER
Govemor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
NORTH CAROLINA
Environmental Quality
January 23, 2024
Mr. Thomas E. Hartye, General Manager
MSD Buncombe County
2028 Riverside Drive
Asheville, North Carolina 28804
Subject: Draft NPDES Permit Renewal
Permit NC0024911
French Broad River W WTP
Buncombe County
Grade IV Biological WPCS
SIC Code 4952
Dear Mr. Hartye:
Enclosed with this letter is a copy of the Draft NPDES permit renewal for your facility. Please
review this draft carefully to ensure thorough understanding of the requirements and conditions it
contains. There are several changes from the existing permit, including the following:
Per review of current effluent and instream data, the site -specific ammonia limitations
have been revised [See A.(L)].
• Based on discussions with MSD and review of their submitted supporting information,
the ammonia compliance schedule has been extended and additional interim requirements
have been added to the permit [See Special Condition A.(9.)].
For calculation of total nitrogen, quarterly effluent monitoring for TKN and NO2+NO3
has been added [See A.(L)].
• For clarity, the instream monitoring requirements have been relocated from Section
A.(1.) to Special Condition A.(2.) Instream Monitoring Requirements.
As the facility discharges to Class B waters, instream fecal coliform monitoring has been
added to the permit [See A.(2.)].
For future verification that the site -specific ammonia limitations are protective and to
track facility impact on ambient ammonia as the Permittee continues to conduct corrective
actions, upstream pH and upstream and downstream ammonia monitoring have been added
[See A.(2.)].
To reflect 15A NCAC 02B .0508 requirements and for consistency of instream sampling
regimens, instream sampling for dissolved oxygen, temperature, conductivity, pH, ammonia,
and fecal coliform shall be conducted 3/week during June, July, August and September then
once per week in the remaining months of the year [See A.(2.)].
The Permittee had, on occasion, used insufficiently sensitive test methods for various
parameters (PQLs higher than the parameters' respective allowable discharge
concentrations). The Permittee should use sufficiently sensitive test methods for all
pollutants, including when performing Effluent Pollutant Scans.
North Carolina Department of Environmental Quality I Division of Water Resources
D EQ 512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
"'T"eaux m,n 919.707.9000

To assess the industrial contribution of PFAS to the French Broad River WRF and assess
levels of PFAS compounds in the facility effluent, Special Condition A.(10.) has been added
to the permit. Please review each paragraph carefully.
Language has been added to Footnote 1 to account for influent and effluent abbreviations
[See A. (1.)].
• Some of the wording has changed in Special Condition A.(3.), Chronic Toxicity Permit
Limit, please review each paragraph carefully.
Special Condition A.(4.) has been modified to include the specific three years in which the
Effluent Pollutant Scan shall be performed (2024, 2025, and 2026). In addition, some of the
wording has changed in Special Condition A.(4.), please review each paragraph carefully.
A notation was made concerning the Electronic Reporting Rule — NPDES Electronic
Reporting Rule — Phase 2 Extension. EPA extended the Phase 2 deadline to December 21,
2025.
Appendix A has been revised to reflect updated groundwater monitoring requirements.
The NPDES standard conditions (Parts II, I1I, and IV) that are a part of the permit are not included
in this draft document (cover, map, and Part I). The conditions are the same as in your current
permit except that agency and division names have been updated. The latest version is available at
https://bit.ly/3k5NFaL and can be viewed online or downloaded as a PDF file.
Concurrent with this notification the Division is publishing a notice in a newspaper having
circulation in the general Buncombe County area, soliciting public comments on this draft
permit. Please provide any written comments you may have to the following: NCDEQ/DWR,
NPDES Permitting Branch, 1617 Mail Service Center, Raleigh, NC 27699-1617 no later than 30
days after receipt of this draft permit.
Following the 30-day public comment period, the Division will review all pertinent comments
and take appropriate action prior to issuing a final permit. If you have questions concerning this
draft permit, please call me at [phone] or by email at [e-mail].
Sincerely,
Nick Coco, PE
NPDES Municipal Permitting Unit
Hardcopy: NPDES Files
Ecopy: US EPA Region 4
DWR/Asheville Regional Office/Water Quality/Daniel Boss
DWR/Operator Certification Program/ Jeff Talbot
DWR/Ecosystems Branch/Mark Vander Borgh
DWR/Aquatic Toxicology Branch/Cindy Moore & Molly Nicholson
DWR/Municipal Permitting Unit/Keyes McGee
Tennessee DEC/Michael Atchley
D E Q�� North Carolina Department of Environmental Quality I Division of W ater Resources
512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
919.707.9000

Permit NC0024911
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
(NPDES)
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
Metropolitan Sewerage District of Buncombe County
IT
is hereby authorized to discharge wastewater from a facility located at the
French Broad River WRF
2225 Riverside Drive
Woodfin
Buncombe County
44
to receiving waters designated as the French Broad River in the French Broad River Basin
- jj"
in accordance with the effluent limitations, monitoring requirements, and other applicable conditions set
forth in Parts I, II, III, and IV hereof.
This permit shall become effective............ Month xx, 2024.
ii
This permit and authorization to discharge shall expire at midnight on ........................ December 31, 2028.
Signed this day ................... Month xx, 2024.
DRAFT
Michael J. Montebello, NPDES Permitting Branch Chief
Division of Water Resources
Page 1 of 21

Permit NC0024911
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby
revoked. As of this permit issuance, any previously issued permit bearing this number is no longer
effective. Therefore, the exclusive authority to operate and discharge from this facility arises under the
permit conditions, requirements, terms, and provisions included herein.
Metropolitan Sewerage District of Buncombe County
is hereby authorized to:
1. Continue to operate and maintain the French Broad WRF, an existing 40.0 MGD facility consisting of
the following components:
• Two multi -rake mechanical bar screens
• Two vortex grit basins
• Three influent pumps with capacity of 35 MGD each.
• Instrumental flow measurement
• Three perforated -plate mechanical fine screens
• 1st, 2nd, and 3rd stage RBCs (152 total)
• Actiflo High -Rate Primary Treatment Unit
• Three intermediate pumps
• Four intermediate clarifier cells (total volume 2 MG)
• Effluent chlorination (liquid sodium hypochlorite)
• Effluent de -chlorination (liquid sodium bi-sulfite))
• Two gravity sludge thickeners A00 ft diameter each
• Two 2.1 MG surge tanks
• Three surge pumps with capacity of 5 MGD each
• Two 2.5-meter belt filter presses (gravity and pressure sections)
• Fluidized bed incinerator (40 DT/day rated)
• One 2 MW back-up generator (diesel)
• Two 1 MW back-up generators (diesel)
• 192 cloth -media filter disks (10 micron)
• Two 450 KW gas generators
• Three 850 KW hydro turbines (French Broad River source)
• 17-acre ash storage lagoon
• SCADA—PC/PLC Control System — full automated control of WRF
2. Discharge from said treatment works at the location specified on the attached map via Outfall 001
into the French Broad River, classified B waters in the French Broad River Basin and 06010105
HUC.
Page 2 of 21

Permit NCO02491 I
PART I
A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [40.0 MGD]
[15A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.] Grade IV
Biological Water Pollution Control System [15A NCAC 08G .03021
(a.) During the period beginning on the effective date of the permit and lasting until permit expiration,
the permittee is authorized to discharge treated municipal and industrial wastewater from Outfall
001. Such discharges shall be limited and monitored' by the permittee as specified below:
PARAMETER
Parameter Cade
EFFLUENT LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location'
Flow 50050
40.0 MGD
Continuous
Recording
I or E
CBOD, 5 day, 20°C 3 80082
25.0 mg/L
40.0 mg/L
Daily
Composite
I and E
Total Suspended Solids' C0530
30.0 mg/L
45.0 mg/L
Daily
Composite
I and E
NH3 as N C0610
Monitor
and Report
Daily
Composite
E
NH3 as N
Interim Limits' C0610
(effective December 31, 2035)
23.0 mg/L
35.0 mg/L
Dail}
Composite
E
NH3 as N (Apr I - Oct 31)
Final Limits",' C0610
(effective December 31, 2037)
8.5 mg/L,
21.4 mg/L
Daily
Composite
E
NH3 as N (Nov 1 - Mar 31)
Final Limits'•5 C0610
(effective December 31, 2037)
17.0 mg/l.
35.0 mg/L
Daily
Composite
E
Fecal Coliform 31616
(geometric mean)
200/100 mL
400/100 mL
Daily
Grab
E
Dissolved Oxygen 00300
Daily Average > 5.0 mg/L
Daily
Grab
E
pH 00400
Between 6.0 and 9.0 Standard Units
Daily
Grab
E
Temperature (°C) 00010
Monitor and Report
Daily
Grab
E
Total Residual Chlorine 6 50060
1 1 28 µg/L
Daily
Grab
E
Conductivity (µmhos/cm) 00094
Monitor and Report
Daily
Grab
E
Total Phosphorus (mg/L) C0665
Monitor and Report
Quarterly
Composite
E
TKN (mg/L) 00625
Monitor and Report
Quarterly
Composite
E
NO3-N + NO2-N (mg/L) 00630
Monitor and Report
Quarterly
Composite
E
Total Nitrogen 7 (mg/L) C0600
Monitor and Report
Quarterly
Calculated
E
PFAS variable
Footnote 8
Footnote 8
Grab
E
Chronic Toxicity' TGP3B
Monitor and Report
Quarterly
Composite
E
Pollutant Scan10 NCO]
Monitor and Report
Footnote 11
Footnote I 1
E
Hardness' I -Total as CaCO3 (mg/L) 00900
1 Monitor and Report
Quarterly
Composite
E
Footnotes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. See Special Condition A.(11.).
2. Sample locations I -Influent, E-Effluent.
3. The monthly average effluent CBOD5 and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent value (85% removal).
Footnotes continue on the next page.
Page 3 of 21

Permit NC0024911
Footnotes continued from A.(1.) Effluent Limitations and Monitoring Requirements:
4. The Permittee shall achieve compliance with these limitations in accordance with and shall follow the
Ammonia compliance schedule detailed in Special Condition A.(9.). Starting on the effective date of this
permit, the Permittee shall perform daily effluent Monitoring and Reporting for ammonia.
5. Final Ammonia limits shall be achieved by December 31, 2037, and last until the NPDES permit is reissued.
See Special Condition A.(9.).
6. The facility shall monitor TRC when using chlorination for disinfection. The Division shall consider all effluent
total residual chlorine values reported below 50 µg/1 to be in compliance with the permit. However, the
permittee shall continue to record and submit all values reported by a North Carolina certified laboratory
(including field certified), even if these values fall below 50 µg/l.
7. For a given wastewater sample, TN = TKN + NO3-N + NO2-N, where TN is Total Nitrogen, TKN is Total
Kjeldahl Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively.
8. See Special Condition A.(10.).
9. Chronic Toxicity (Ceriodaphnia dubia) P/F at 12% with testing in February, May, August and November. See
Special Condition A.(3.).
10. The permittee shall perform three effluent pollution scans during the tern of this permit. See Special Condition
A.(4.).
11. Effluent hardness shall be performed in conjunction with testing for hardness dependent metals.
There shall be no discharge of floating ' s or visible foam in other than trace amounts.
Page 4 of 21

Permit NC0024911
A.(2.) INSTREAM MONITORING REQUIREMENTS
[15A NCAC 02B.0500 et seq.]
Beginning on the effective date of this permit and lasting until the expiration date, the Permittee shall
perform instream sampling upstream and downstream of Outfall 001 as specified below:
PARAMETER
Parameter Code
MONITORING REQUIREMENTS
Measurement
Frequency
Sample Type
Sample Location
Dissolved Oxygen (mg/L) 00300
Variable'
Grab
Upstream, Downstream
Temperature °C 00010
Variable'
Grab
Upstream, Downstream
Conductivity (µmhos/cm) 00094
Variable'
Grab
Upstream, Downstream
Fecal Coliform (#/100mL) 31616
(geometric mean)
Variable'
Grab
Upstream, Downstream
pH (s.u.) 00400
Variable'
Grab
Upstream, Downstream
NH3 as N (mg/L) C0610
Variable'
Grab
Upstream, Downstream
Hardness -Total as CaCO3 (mg/L) Z 00900
Quarterly
Grab
Upstream
Footnotes:
1. Sample locations: Upstream = at dam discharge to fish ladder adjacent to intake flume to the hydroelectric plant
(Location is approximately 2700 feet upstream of the hydroelectric plant), Downstream = at Ledges Park.
Upstream and downstream samples shall be grab samples collected 3/week during June, July, August, and
September and 1/week during the remainder of the year.
2. The permittee shall sample instream hardness upstream of the facility's discharge. The sample shall be
representative of the hardness in the stream.
Page 5 of 21

Permit NC0024911
A.(3.) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY)
[15A NCAC 02B .0200] [15A NCAC 02B .0500 et seq]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dubia at an effluent concentration of 12%.
The permit holder shall perform at a minimum, guarterly 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
TGP311 for the pass/fail results and THP311 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.
Page 6 of 21

Permit NC0024911
A.(4.) ADDITIONAL MONITORING REQUIREMENTS FOR PERMIT RENEWAL
[G.S. 143-215.1(B)]
(a.) Effluent Pollutant Scans. The permittee shall perform a total of three (3) Effluent Pollutant Scans
for all parameters listed below. One scan must be performed in each of the following years: 2024,
2025, and 2026. Analytical methods shall be in accordance with 40 CFR Part 136 and shall be
sufficiently sensitive to determine whether parameters are present in concentrations greater than
applicable standards and criteria. Each annual sample shall coincide with one quarterly toxicity test
each year (see Condition A.(3.) (CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY))), and
each must be collected in a different calendar quarter to represent seasonal variation [i.e., do not
sample in the same quarter every year]. Unless otherwise indicated, metals shall be analyzed as
"total recoverable."
Ammonia (as N)
C0610
Trans-1,2-dichloroethylene
34546
Bis (2-chloroethyl) ether
34273
Chlorine (total residual, TRC)
50060
1, 1 -dichloroethylene
34501
Bis (2-chloroisopropyl) ether
34283
Dissolved oxygen
00300
1,2-dichloropropane
C0541
Bis (2-ethylhexyl) phthalate
C0100
Nitrate / Nitrite
00630
1,3-dichloropropylene
77163
4-bromophenyl phenyl ether
34636
Kjeldahl nitrogen
00625
Ethylbenzene
34371
Butyl benzyl phthalate
34292
Oil and grease
00556
Methyl bromide
34413
2-chloronaphthalene
34581
Phosphorus
C0665
Methyl chloride
34418
4-chlorophenyl phenyl ether
34641
Total dissolved solids
70295
Methylene chloride
34423
Chrysene
34320
Hardness
00900
1,1,2,2-tetrachloroethane
81549
Di-n-butyl phthalate
39110
Antimony
01097
Tetrachloroethylene
34475
Di-n-octyl phthalate
34596
Arsenic
01002
Toluene
34010
Dibenzo(a,h)anthracene
34556
Beryllium
01012
1, 1, 1 -trichloroethane
34506
1,2-dichlorobenzene
34536
Cadmium
01027
1,1,2-trichloroethane
34511
1,3-dichlorobenzene
34566
Chromium
C0034
Trichloroethylene
39180
1,4-dichlorobenzene
34571
Copper
01042
Vinyl chloride
39175
3,3-dichlorobenzidine
34631
Lead
01051
Acid -extractable compounds:
Diethyl phthalate
34336
Mercury (Method 1631E)
COMER
P-chloro-m-cresol
34452
Dimethyl phthalate
34341
Nickel
01067
2-chlorophenol
34586
2,4-dinitrotoluene
34611
Seleni
°" 01147
2,4-dichlorophenol
34601
2,6-dinitrotoluene
C0626
Silv
t,
01077
2,4-dimethylphenol
34606
1,2-diphenylhydrazine
34346
Th
Zinc
µ
01059
01092
4,6-dinitro-o-cresol
2,4-dinitrophenol
34657
34616
Fluoranthene
Fluorene
C0376
34381
Cyanide
00720
2-nitrophenol
34591
Hexachlorobenzene
C0700
Total phenolic compounds
32730
4-nitrophenol
34646
Hexachlorobutadiene
C0702
Volatile urnanic compounds:
Pentachlorophenol
39032
Hexachlorocyclo-pentadiene
34386
Acrolein
34210
Phenol
34694
Hexachloroethane
34396
Acrylonitrile
34215
2,4,6-trichlorophenol
34621
Indeno(1,2,3-cd)pyrene
34403
Benzene
34030
Base -neutral compounds:
Isophorone
34408
Bromoform
32104
Acenaphthene
34205
Naphthalene
34696
Carbon tetrachloride
32102
Acenaphthylene
34200
Nitrobenzene
34447
Chlorobenzene
34301
Anthracene
CO220
N-nitrosodi-n-propylamine
34428
Chlorodibromomethane
34306
Benzidine
39120
N-nitrosodimethylamine
34438
Chloroethane
85811
Benzo(a)anthracene
C0526
N-nitrosodiphenylamine
34433
2-chloroethyl vinyl ether
34576
Benzo(a)pyrene
34247
Phenanthrene
34461
Chloroform
32106
3,4 benzofluoranthene
34230
Pyrene
34469
Dichlorobromomethane
32101
Benzo(ghi)perylene
34521
1,2,4-trichlorobenzene
C0551
1,1-dichloroethane
34496
Benzo(k)fluoranthene
34242
1,2-dichloroethane
32103
Bis (2-chloroethoxy) methane
34278
Page 7 of 21

Permit NC0024911
(b.) Effluent Scan Reporting. Test results shall be reported electronically via eDMR by December
31 st of each designated sampling year, except that, subject to prior written approval by the Director,
results can be reported on DWR Form DMR-PPA-1 or other form approved by the Director. The
permittee must at least report completion of the test in the eDMR system by entering "1" or "Y" for
parameter code NCO - Annual Pollutant Scan. If written reports are approved, the report shall be
submitted to the following address:
North Carolina Division of Water Resources
Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Or the form may be uploaded at: https://edocs.deq.nc.gov/Forms/NPDES_WW-EDMR-
Supplemental-Form
m:.
(c.) 2'-Species Toxicity Testing and Reporting.
(i.) In addition to the quarterly toxicity tests required in Condition A.(3.) (CHRONIC TOXICITY
PERMIT LIMIT (QUARTERLY)), the Permittee shall perform and report the results of four
(4) toxicity tests using the same test methods using a second species of test organism suitable
to the tests being conducted
I
(ii.) The 2nd species toxicity tests shall be conducted either:
(A) Once per quarter in a single 12-month period (four samples); if this option is chosen,
the sample for each 2nd species test shall coincide with the quarterly samples collected
for (CHRONIC TOXICITY PERMIT LIMIT (Q UARTERL 19 ); or
(B) Once per 12-month period in the four -and one-half year period prior to the scheduled
application for permit renewal (four samples); if this option is chosen, three of the
samples for the 2nd species test shall coincide with those for the annual effluent scans
and the coincident quarterly toxicity test, and each of the four annual samples shall be
collected in a different calendar quarter in order to represent seasonal variation.
(iii.) The results of the toxicity tests shall be submitted to the following address:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Or, results can be sent to the email, [e-mail].
(iv.) Results of the 2"d species tests shall also be summarized in Part E (Toxicity Testing Data) of
EPA Municipal Application Form 2A when submitting the permit renewal application to the
NPDES Wastewater Program.
The Permittee may contact the Division's Aquatic Toxicology Branch at 919-743-8401 for
guidance on conducting the additional toxicity tests and reporting of the results.
Page 8 of 21

Permit NCO024911
A.(5.) PRETREATMENT MONITORING
[N.C.G.S. 143-215.1 (B)]
Ground Water remediation sites discharging to MSD Buncombe WRF with locally issued permits shall be
considered as Non -Significant Industrial Users and shall have no specific requirements for parameter
limits or monitoring frequency if,they do not discharge more than 25,000 gallons of industrial process
wastewater per day, they do not discharge more than 5% of the Maximum Allowable Headworks Loading
(MARL) of any pollutant to the MSD Buncombe WRF, they are not a 40 CFR regulated Categorical
Industry, or they do not in the opinion of the Director of MSD Buncombe have the potential to upset or
interfere with the operation of the WRF. The Director of MSD WRF shall enforce the Sewer Use
Ordinance, permit, limit, monitor, and inspect all dischargers to their WRF as needed to assure proper
operation and compliance with all NPDES effluent limits including Whole Effluent Toxicity.
A.(6.) MERCURY MINIMIZATION PLAN (MMP)
[N.C.G.S. 143-215.1 (B)]
The Permittee shall maintain and continue to implement the Mercury Minimization Plan (MMP)
developed in the previous permit term. The MMP shall continue to be available for inspection on -site.
The MMP should place emphasis on identification of mercury contributors and goals for reduction.
Results shall be summarized and submitted with the next permit renewal. Performance of the MMP will
meet the requirements of the TMDL (Total Maximum Daily Load) for mercury approved by USEPA on
October 12, 2012, unless and until a Waste Load Allocation specific to this facility is developed and this
NPDES permit is amended to require further actions to address the Waste Load Allocation.
A.(7.) GROUNDWATER REQUIREMENTS
[15A NCAC 2L .0200]
The permittee shall conduct groundwater monitoring to determine compliance with the current
groundwater Standards found under 15A NCAC 2L .0200. The monitoring shall be conducted in
accordance with the Sampling Plan approved by the Division (See Appendix A). If any change is made to
the Sampling Plan, the permittee shall submit the modified plan to DWR Ashville Regional Office for
approval, and submit the approved Sampling Plan to the Division at the following address:
NCDEQ/Water Quality
NPDES Municipal Permitting
1617 Mail Service Center
Raleigh, NC 27699-1617
A.(8.) ASH STORAGE LAGOON
[G.S. 143-215.1(B)]
MSD Buncombe is permitted to operate a 17-acre lagoon for the purpose of storing incinerator ash.
Effluent from this lagoon is sent to the head of the plant for treatment. No other materials may be stored
in the lagoon without prior Division notification and approval.
Page 9 of 21

Permit NC0024911
A.(9.) SCHEDULE OF COMPLIANCE FOR AMMONIA LIMITATIONS
[G.S. 143-215.1 (b)]
(a.) By December 31, 2024,
(a.) the Permittee shall submit a progress report on High Rate Primary Treatment performance
testing results and the status of the optimization and improvements plan. Testing to include
NH3-N, Total N, Total BOD, and Soluble BOD at influent and effluent locations;
(b.) the Permittee shall submit an annual report identifying the steps that have been taken and the
progress towards completing the Biological Treatment design, including preliminary
evaluations, process alternatives development and process verification and selection;
(c.) the Permittee shall identify and begin sampling of or develop or modify the Industrial User
Permits (IUPs) for each Industrial User in the approved pretreatment program suspected of
ammonia discharges to the French Broad River WRF;
(b.) By December 31, 2025,
(a.) The Permittee shall submit final results on the High Rate Primary Treatment performance
testing, and the status of the optimization and improvements plan. Testing to include NH3-N,
Total N, Total BOD, and Soluble BOD at influent and effluent locations;
(b.) the Permittee shall submit a report summarizing preliminary evaluations, process alternatives
development and process verification and selection updates.
(c.) By December 31, 2026, The Permittee shall submit a completed Biological Treatment Alternative
Evaluation report including the chosen alternative along with a Preliminary Engineering Report
including a design and construction timeline and specific steps to be taken to achieve the ammonia -
nitrogen limits.
(d.) By December 31, 2027, the Permittee shall submit a Biological Treatment Upgrade Project progress
report identifying the selected design Engineer and providing an update regarding onsite piloting and
performance verification.
(e.) By December 31, 2028, the Permittee shall submit a progress report summarizing design updates;
(f.) By December 31, 2029, the Permittee shall submit the For Construction (100%) design and obtain all
necessary permits;
(g.) By December 31, 2030, The Permittee shall advertise and bid the Biological Treatment Upgrade
Project construction, select their contractor and mobilize construction;
(h.) By December 31, 2031, the Permittee shall submit a progress report summarizing the status of
construction;
(i.) By December 31, 2032, the Permittee shall submit a progress report summarizing the status of
construction;
By December 31, 2033, the Permittee shall submit an Engineer's Certification for the completed
construction to date and either:
(a.) achieve compliance with monthly average and weekly average ammonia limits of 29.0 mg/L
and 35.0 mg/L, respectively or;
(b.) Provide written justification to the Division for delay of ammonia reductions including
assurance that the construction timeline has been expedited to achieve compliance with
monthly average and weekly average ammonia limits of 23.0 mg/L and 35.0 mg/L,
respectively, by December 31, 2034 at the expense of achieving compliance with limits
outlined in item (a).
(k.) By December 31, 2034, the Permittee shall submit a progress report summarizing the status of
construction and, if item (j)(b) was satisfied, achieve compliance with monthly average and weekly
average ammonia limits of 23.0 mg/L and 35.0 mg/L, respectively.
Page 10 of 21

Permit NCO024911
(1.) By December 31, 2035, the Permittee shall submit an Engineer's Certification for the completed
construction to date and achieve compliance with monthly average and weekly average ammonia
limits of 23.0 mg/L and 35.0 mg/L, respectively;
(m.) By December 31, 2036, the Permittee shall submit a progress report summarizing the status of
construction;
(n.) By December 31, 2037, the Permittee shall complete construction of and Engineer's Certification for
the completed construction and achieve compliance with Final Limits identified in Section A.(1.);
Any modifications to the schedule shall be requested to the Division at least ninety (90) days before the
deadline. Modifications to the schedule more than four months will be subject to public notice.
All reports shall be submitted to each of the following Division of Water Resources addresses:
(1) NCDEQ/Water Quality
NPDES Municipal Permitting
1617 Mail Service Center
Raleigh, NC 27699-1617
(2) NCDEQ/Water Quality
Asheville Regional Office
2090 US 70 Highway
Swannanoa, NC 28778-8211
A.(10.) PFAS MONITORING REQUIREMENT AND PRETREATMENT
[G.S. 143-215.1(b.)]
(a.) In the absence of a final 40 CFR Part 136 method, effluent PFAS monitoring shall be conducted. The
311 or more recent wastewater draft analytical method 1633 (see 40 CFR 122.21(e)(3)(ii) and 40 CFR
122.44(i)(1)(iv)(B)) shall be used and shall include all target analytes listed under Table 1 of the draft
method until such time as the Permittee uses the Final PFAS Method for wastewater. Effective the first
full calendar quarter following six (6) months after EPA publishes a 40 CFR part 136 Final PFAS
Method for wastewater in the Federal Register, effluent PFAS monitoring shall be conducted using
the approved EPA Final PFAS Method 1633.
(b.) Effluent monitoring using the draft analytical method takes effect the first full calendar quarter
following six (6) months after the effective date of the permit (Month xx, 2024) and will be at a
quarterly frequency thereafter.
Appendix B has been added to the permit to identify the current analytes listed under Table 1 of the
0 Draft Method 1633 Analysis of Per- and Polyfluoroalkyl Substances (PFAS) July 2023, in
Aqueous Samples and the appropriate ICIS codes for use when reporting in the electronic
Discharge Monitoring Reports (eDMRs). The method and list of analytes may also be found at:
https://www.epa.gov/system/files/documents/2022-
12/3rd%20Draft%20Method%201633%20December%202022%2012-20-22 508.pdf
PFAS Monitoring using the Draft Method 1633 shall be reported quarterly using the Division -
provided submittal form. Once PFAS monitoring is conducted using the EPA Final PFAS Method
1633, data shall be reported in the monthly eDMRs.
Please note that specific considerations and protocols are required to avoid cross -contamination and
minimize sample bias for PFAS. A current listing of laboratories accredited by the Perry Johnson
Laboratory Accreditation, Inc. (PJLA), ANSI National Accreditation Board (ANAB), or the
American Association for Laboratory Accreditation (A2LA) to perform EPA Draft Method 1633 can
be found by contacting the individual associations. Please note that different labs are accredited for
different matrices.
NOTES - Sampling and Analytical:
• Sampling shall be planned so that required holding times for analytical methods are met.
• Using one of the analytical laboratories included above will allow consistency in analytical
method and in anticipation of a final method.
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Permit NC0024911
• ound.
" flag values shall be reported when the "J" flag value is associated with the method's upper
b"J" flag values need not be reported when less than the method's Minimum Reporting Level
(listed in Method 1633).
• Laboratories approved for Aqueous matrix may be utilized. Please note that the lab used does not
have to be in North Carolina.
(c.) Pretreatment program activities:
(i.) PFAS Monitoring Applicability: Industry categories known or suspected to discharge PFAS
from the EPA PFAS Strategic Roadmap include: organic chemicals, plastics & synthetic fibers
(OCPSF); metal finishing; electroplating; electric and electronic components; landfills; pulp,
paper & paperboard; leather tanning & finishing; plastics molding & forming; textile mills;
paint formulating, and airports. This is not an exhaustive list and additional industries may also
discharge PFAS. For example, Centralized Waste Treatment (CWT) facilities may receive
wastes from the aforementioned industries and should be considered for monitoring. There may
also be categories of dischargers that do not meet the applicability criteria of any existing
Effluent Limitation Guidelines (ELG); for instance, remediation sites, chemical manufacturing
not covered by OCPSF, and military bases.'
' ELG categories of airport deicing, landfills, textile mills, and plastics molding and forming do not
have categorical pretreatment standards, and therefore small -volume indirect dischargers in those
categories would not ordinarily be considered Significant Industrial Users (SIUs) and may not be
captured on an existing IU inventory. IUs under the Paint Formulating category are only subject to
Pretreatment Standards for New Sources (PSNS), and existing sources may need to be inventoried.
(ii.) The Permittee shall identify and locate each Significant Industrial User (SIU) in the approved
pretreatment program in industry categories expected or suspected of PFAS discharges to the
French Broad River WRF; and begin sampling of and modify Industrial User Permits (IUPs)
for each SIU identified as suspected of PFAS discharges to the French Broad River WRF to
ensure sampling begins within six months of the permit effective date, by Month xx, 2024.
(iii.) Update Industrial Waste Survey (IWS) Inventory: POTWs must identify and locate all possible
indirect dischargers that might be subject to the pretreatment program and identify the character
and volume of pollutants contributed to the POTW by the indirect dischargers (see 40 CFR
403.8(f)(2)). As EPA regulations require, this information shall be provided to the Division
(see 40 CFR 122.440) and 40 CFR 403.8(f)(6)) as part of the 2024 Pretreatment Annual
Report (PAR). The IWS inventory shall be revised, as necessary, to include all indirect
dischargers in industry categories expected or suspected of PFAS discharges.' (see 15A NCAC
02H .0906(b)(2)).
(iv.) The Permittee shall begin sampling of and/or issue IUPs for each indirect discharger identified
as suspected of PFAS discharges to the French Broad River WRF to ensure sampling begins
within six months of completion of the IWS.
(v.) The Division has determined that all SIUs and indirect dischargers identified above analyze
their discharge for PFAS at the same quarterly sampling frequency and with the same
analytical method to ensure protection of human health and the environment due to the
potential health hazards associated with PFAS. Collection and evaluation of this information
will also assist the Department in developing sound policies with respect to PFAS in the
environment.
(vi.) The Permittee shall ensure that IUPs within the French Broad River WRF service area are
modified or reissued, new IUPs are issued, and other Pretreatment Program mechanisms are
completed to address PFAS discharges to POTWs.
(vii.) In the absence of local limits, and based upon data as they become available, POTWs shall
encourage Best Management Practices (BMPs), pollution prevention, product substitution, and
Page 12 of 21

Permit NC0024911
good housekeeping practices to make meaningful reductions in PFAS introduced to POTWs.
Such BMPs could be like those included in the EPA Office of Water, December 5, 2022,
"Addressing PFAS Discharges in NPDES Permits and Through the Pretreatment Program and
Monitoring Programs."A3. "Best Management Practices (BMPs) for discharges of PFAS,
including product substitution, reduction, or elimination of PFAS, as detected by draft method
1633".
(viii.) A summary of all actions taken by the Permittee and their industries and monitoring conducted
by each indirect discharger identified as part of this Special Condition shall be provided as part
of the PAR (see 15A NCAC 02H .0908(b)).
A.(11.) ELECTRONIC REPORTING - DISCHARGE 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.)
• Section D. (2.)
• Section D. (6.)
• Section E. (5.)
Signatory Requirements
Reporting
Records Retention
Monitoring Reports
1. Reportine 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) internet application.
Monitoring results obtained during the previous month(s) shall be summarized for each month and
submitted monthly 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
See "How to Request a Waiver from Electronic Reporting" section below.
Monitoring results obtained during the previous month(s) shall be summarized for each month and
reported via the eDMR system no later than the last calendar day of the month following the
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Permit NC0024911
completed reporting period. 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, 2025, the permittee must electronically report the following compliance
monitoring data and reports, when applicable:
• Sewer Overflow/Bypass Event Reports; and
• 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(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
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Permit NC0024911
4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)1
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II,
Section B. (I 1.)(a) or by a duly authorized representative of that person as described in Part II,
Section B. (I 1.)(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 `` JA
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.)l
The pen!nittee 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].
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Permit NCO02491 I
NC00024911 - MSD Buncombe County Facility x
Latitude: 35a35'02" Sub -Basin: 0601012
Longitude: 82e35'S4" HUC: O1i010105 Location
Quad E8NE/Weaverville
Stream Class: 8
Metropolitan Sewerage Dim ofBuncombe County
Receiving Stream: French Broad River North NC0024911
Permitted Flow: 40.0 MGD MSD-Bunmmbe WWTP
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Permit NCO02491 I
Appendix A: Groundwater Requirements
1. Sampling Requirements:
a. The four existing Groundwater Monitorina Wells are summarized in the table below.
Groundwater Monitoring
Wells
Well Location
Latitude
Longitude
MW-5
35.646495
-82.593241
MW-6R
35.644169
-82.598875
MW-7
35.644677
-82.598981
MW-8R
35.645242
-82.599055
b. Existing monitoring wells shall be sampled every January, June, and October. Detailed sampling
requirements are listed in the table below.
Groundwater Characteristics
Monitoring Requirements
PCS Code
Parameters
Frequency
Sample Type
00610
Ammonia (as NH3-N)
January,
June,
October
Grab
01007
Barium (as Ba)
Grab
01027
Cadmium (as Cd)
Grab
00940
Chloride (as CI)
Grab
01034
Chromium (as Cr)
Grab
01037
Cobalt (as Co)
Grab
01045
Iron (as Fe)
January,
June,
October
Grab
01051
Lead (as Pb)
Grab
01055
Manganese (as Mn)
Grab
71900
Mercury (as Hg)
Grab
01067
Nickel (as Ni)
January,
June,
October
Grab
00600
Nitrate (as NO3-N)
Grab
00400
pH
Grab
00981
Selenium (as Se)
Grab
00929
Sodium (as Na)
Grab
00945
Sulfate (as SO4)
Grab
70300
Solids, Total Dissolved — 180 °C
January,
June,
October
Grab
00680
Carbon, Total Organic (as TOC)
Grab
85820
Water Level from Surface', 2
Calculated
78732
Volatile Compounds, (GUMS)
Annually 3
Grab
Footnotes on next page.
Page 17 of 21

Permit NCO024911
Footnotes:
I - The measurement of water levels shall be made prior to purging the wells. The depth to water in
each well shall be measured from the surveyed point on the top of the casing. The measurement of
pH shall be made after purging and prior to sampling for the remaining parameters.
2. The measuring points (top of well casing) of all monitoring wells shall be surveyed to provide the
relative elevation of the measuring point for each monitoring well. The measuring points (top of
casing) of all monitoring wells shall be surveyed relative to a common datum.
I Annual sampling for volatile organic compounds shall be conducted in the month of October
exclusively.
c. Volatile organic compounds (VOCs) shall be analyzed for the following methods:
i. Standard Method 6200C (PQL at 0.5 µg/L or less),
ii. Standard Method 6200B (PQL at 0.5 µg/L or less),
iii. EPA Method 8021 (Low Concentration, PQL at 0.5 µg/L or less),
iv. EPA Method 8260 (Low Concentration, PQL at 0.5 µg/L or less), or
V. Another method with prior approval by the Water Quality Regional Office Section
Chief.
Any of the referenced methods used for VOCs shall, at a minimum, include all of the constituents
listed in Table 6200: I of Standard Method 6200. Any method shall provide a PQL at 0.5 µg/L or
less, which shall be supported by laboratory proficiency studies required by the Division's
Laboratory Certification Unit. Any constituents detected above the MDL, but below the PQL at
0.5 µg/L, shall be qualified (i.e., estimated) and reported.
d. Any laboratory selected to analyze parameters shall be Division -certified for those parameters
required.
2. Monitoring Well Closure Requirements:
a. Within one year of the effective date of the permit, existing monitoring wells MW2, MW3, MW4
shall be abandoned in accordance with 15A NCAC 02C .0113.
b. Questions concerning the requirements in this special condition should be directed to the regional
office supervisor, Asheville Regional Office [phone].
3. Low -Flow Sampling Requirements
The permittee is required to implement a low -flow sampling technique to ensure the turbidity
concentrations are less than 10 NTU's at the time groundwater samples are collected. Low -flow
sampling utilizes an adjustable rate pump (e.g. peristaltic pump) with typical flow rates on the order
of 0.03 — 0.13 gallons per minute (GPM). Water level, field parameters (e.g. temperature, pH,
specific conductivity, dissolved oxygen, & oxidation reduction potential), and turbidity are all
measured simultaneously. A groundwater sample is typically collected after the field parameters and
water level have stabilized and the turbidity concentration is below 10 NTUs.
4. Reporting / Documentation Requirements
a. The results of the sampling and analysis shall be received on the most -recent version of
Groundwater Quality Monitoring: Compliance Report Forms (i.e. GW-59 & GW-59a Form) with
Page 18 of 21

Permit NC0024911
copies of the laboratory analyses to the Division on or before the last working day of the month
following the sampling month.
b. All reports, maps, and other documents required in the "Groundwater Requirements" section of
this permit, unless otherwise directed, shall be mailed to the following address:
Attention: NCDEQ — DWR
Information Processing Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
c. Updated blank forms may be downloaded from the website below or requested from the address
listed above.
https://deg.nc.gov/aboutldivisions/water-resources/water-resources-permits/wastewater-
branch/non-discharg_e-permittin -ug nit/reporting-forms
5. ADDlicable Boundary Requirements
The Compliance boundary is specified by regulations in 15A NCAC 02L .0107 (a). For disposal systems
individually permitted prior to December 30, 1983, the compliance boundary is established at a horizontal
distance of 500 feet from the waste boundary or at the property boundary, whichever is closer to the
source. An exceedance of Groundwater Quality Standards at or beyond the Compliance Boundary is
subject to corrective action according to 15A NCAC 2L .0106 (c).
6. Additional Requirements
Any additional groundwater quality monitoring, as deemed necessary by the Division, shall be provided.
Page 19 of 21

Permit NCO024911
Appendix B. PFAS Target Analytes EPA Method 1633
Vh Draft, July 2023).
Target Analyte Name
Abbreviation
CAS Number
Parameter
Code
Perfluoroalkyl carboxylic acids
Perfluorobutanoic acid
PFBA
375-22-4
51522
Perfluoropentanoic acid
PFPeA
2706-90-3
51623
Perfluorohexanoic acid
PFHxA
307-24-4
51624
Perfluoroheptanoic acid
PFHpA
375-85-9
51625
Perfluorooctanoic acid
PFOA
335-67-1
51521
Perfluorononanoic acid
PFNA
375-95-1
51626
Perfluorodecanoic acid
PFDA
335-76-2
51627
Perfluorouodecanoic acid
PFUnA
2058-94-8
51628
Perfluorododecanoic acid
PFDoA
307-55-1
51629
Perfluorolridecanoic acid
PFTrDA
72629-94-8
51630
Perfluorotetradecanoic acid
PFTeDA
376-06-7
51531
Perfluoroalkyl sulfonic acids
Perfluorobutanesulfonic acid
PFBS
375-73-5
52602
Perfluoropntanesulfonic acid
PFPeS
2706-91-4
52610
Perfluorohexanesulfonic acid
PFHxS
355-46-4
52605
Perfluorohepanesulfonic acid
PFHpS
375-92-8
52604
Perfluorooctanesulfonic acid
PFOS
1763-23-1
52606
Perfluorononanesulfonic acid
PFNS
68259-12-1
52611
Perfluorodecanesulfonic acid
PFDS
335-77-3
52603
Perfluorododecanesulfonic acid
PFDoS
79780-39-5
52632
Fluorotelomer sulfonic acids
1H,1H,2H,2H-Perfluorohexane sulfonic acid
4:2FTS
757124-72-4
52607
1H,1H,2H,2H-Perfluorooctane sulfonic acid
6:2FTS
27619-97-2
52608
1H,1H,2H,2H-Perfluorodexane sulfonic acid
8:2FTS
39108-34-4
52609
Perfluorooctane sulfonamides
Perfluorooctanesulfonamide
PFOSA
754-91-6
51525
N-methyl perfluorooctanesulfonamide
NMeFOSA
31506-32-8
52641
N-ethyl perfluorooctanesulfonamide
NEtFOSA
4151-50-2
52642
Table continues on next page.
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Permit NCO024911
Table continued from Appendix B. PFAS Target Analytes EPA Method 1633 (4`h Draft, July 2023).
Fa rget Analyte Name
Abbreviation
CAS Number
Parameter
Code
Perfluorooctane sulfonamidoacetic acids
N-methyl perfluorooctanesulfonamidoacetic acid
NMeFOSAA
2355-31-9
51644
N-ethyl perfluorooctanesulfonamidoacetic acid
NEtFOSAA
2991-50-6
51643
Perfluorooctane sulfonamide ethanols
N-methyl perfluorooctanesulfonamidoethanol
NMeFOSE
24448-09-7
51642
N-ethyl perfluorooctanesulfonamidoethanol
NetFOSE
1691-99-2
51641
Per -and Polyfluorother carboxylic acids
Hexafluoropropylene oxide dimer acid
HFPO-DA
13252-13-6
52612
4,8-Dioxa-3H-perfluorononanoic acid
ADONA
919005-14-4
52636
Perfluoro-3-methoxypropanoic acid
PFMPA
377-73-1
PF002
Perlfuoro4-methoxybutanoic acid
PFMBA
863090-89-5
PF006
Nonafluoro-3,6-dioxaheptanoic acid
NFDHA
151772-58-6
52626
Ether sulfouic acids
9-Chlorohexadecafluoro-3-oxanonane-l-sulfonic acid
9CI-PF30NS
756426-58-1
PF003
11-Chloroeicosafluoro-3-oxaundecane-l-sulfonic acid
11C1-PF3OUdS
763051-92-9
PF004
Perfluoro(2-ethoxyethane)sulfonic acid
PFEESA
113507-82-7
52629
Fluorotelomer carboxylic acids
3-Perfluoropropyl propanoic acid
3:3FTCA
356-02-5
PF001
2H,2H,3H,3H-Perfluorooctanoic acid
5:3FTCA
914637-49-3
PF007
3-Pertluoroheptyl propanoic acid
7:3FTCA
812-70-4
PF005
Page 21 of 21