NC0025534_Draft Permit_20240624

DocuSign Envelope ID: 3D9AD657-EIDC-4528-8F7A-707C3F2B8694
ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
Garrett DeMoss, Jr.
Town of Hendersonville
305 Williams Street
Hendersonville, North Carolina 27892
Dear Mr. DeMoss:
NORTH CAROLINA
Environmental Quality
June 24, 2024
Subject: Draft NPDES Permit Renewal
Permit NCO025534
Hendersonville WWTP
Henderson County
Grade IV Biological WPCS
SIC Code 4952
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:
• In the event that the facility uses chlorination for disinfection, a Total Residual Chlorine limit of
28 µg/L with daily monitoring has been add to the permit, to be effective when the Permittee uses
chlorination at both flow tiers [See A.(1.) and A.(2.)].
• Based on the facility's receiving industrial waste via a Division -approved pretreatment program
and in accordance with 15A NCAC 02B .0508, Conductivity effluent monitoring has been added
to the permit at a daily frequency. In addition, instream (upstream and downstream) Conductivity
monitoring has been added to the permit at variable frequencies throughout the year [See A.(L)
and A.(2.)].
• To better identify nitrogen in the effluent, monthly monitoring for NO2+NO3 have been added to
the permit [See A.(L) and A.(2.)].
• Based on the reasonable potential analysis (RPA) showing no reasonable potential to violate state
water quality standards, the monitoring requirement for Total Nickel and Total Silver have been
removed from the permit [See A.(L) and A.(2.)].
• Based on the reasonable potential analysis (RPA) predicting a maximum effluent Total Copper
concentration that is greater than half of the allowable discharge concentration based on state water
quality standards, monthly monitoring for Total Copper is maintained at 4.8 MGD, and the limits
were removed and monitoring maintained at monthly at 6.0 MGD [See A.(L) and A.(2.)].
• Based on the facility receiving industrial wastewater from industry types recognized as potential
sources of 1,4-Dioxane, quarterly monitoring for 1,4-Dioxane with a permit reopener condition has
been added to the permit [See A.(6.)].
• To assess industrial contributions of PFAS chemicals to the Hendersonville WWTP and assess
levels in the facility effluent, Special Condition A.(7.) has been added to the permit.
• Some of the wording has changed in Special Condition A.(3.), Chronic Toxicity Permit Limit,
please review each paragraph carefully.
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
a.m mM. o�.nM 919.707.9000

DoctiSign Envelope ID: 3D9AD657-E1DC-4528-BF7A-707C3F2B8694
• Special Condition A. (4.) has been modified to include the specific three years in which the Effluent
Pollutant Scan shall be performed (2025, 2026, and 2027). In addition, at the end of the Special
Condition, 2nd species Toxicity Testing Requirements for municipal permit renewals per Federal
Regulations [40 CFR 122.210)(5)] have been added.
• To address the biological community impairment of Mud Creek in light of the future facility
expansion to 6.0 MGD, a special condition requiring biological assessment once the AtC is issued
for the 6.0 MGD expansion to be conducted upstream and downstream of the outfall has been added
to the permit [See A.(8.)].
• 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.
• Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and
program reports. The requirement to continue reporting discharge monitoring data electronically
using the NC DWR's Electronic Discharge Monitoring Report (eDMR) internet application has
been added to your NPDES permit [See Special Condition A (9.)].
• The map has been revised by replacing the "Sub -basin" six -digit designation (now obsolete) to
"River Basin"
The NPDES standard conditions (Parts II, III, 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 hgps://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 Henderson 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,
E
Do uftrwd by:aPt.Y{.l++u�h,r
9F8 952DF8155.
Gary Perlmutter, Environmental Specialist H
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 / Aquatic Toxicology Branch / Cindy Moore & Molly Nicholson
DWR / Municipal Permitting Unit / Keyes McGee
Tennessee DEC, Chattanooga Field Office / Jennifer Inns (Jennifer.InnesCa)tn.gov)
D E Q�� North Caroline Department of Environmental Quality I Division of Water Resources
512 North Salisbury street 1 1611 Mail service Center I Raleigh, North Carolina 27699-1611
rrnrH cup , i.n
919.707.9000

DocuSign Envelope ID: 3D9AD657-E1DC-4528-8F7A-707C3F2B8694
Permit NCO025534
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
City of Hendersonville
is hereby authorized to discharge wastewater from a facility located at the
Hendersonville WWTP
99 Balfour Road
Hendersonville, NC 28792
Henderson County
to receiving waters designated as the Mud Creek in the French Broad River Basin 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 mmm dd, 2024.
This permit and authorization to discharge shall expire at midnight on December 31, 2028.
Signed this day mmm dd, 2024.
DRAFT
Michael J. Montebello, NPDES Permitting Branch Chief
Division of Water Resources
Page 1 of 20

DocuSign Envelope ID: 3D9AD657-E1DC-4528-8F7A-707C3F2BOMM
Permit NCO025534
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.
The City of Hendersonville
is hereby authorized to:
1. Continue to operate and maintain the wastewater treatment works identified on the Cover, an existing
4.8 MGD facility consisting of the following components:
• Influent pump station
• Dual mechanical bar screens
• Dual grit chamber
• Dual aeration chambers
• Three centrifugal blowers
• Dual clarifiers
• Recycle pump stations
• Dual effluent filters
• Ultraviolet disinfection
• Dual gravity thickeners
• Sludge dewatering
2. Upon issuance of an Authorization to Construct permit from the Division of Water Resources and
submission of the Engineer's Certification for expansion, operate a wastewater treatment facility up to
a design flow of 6.0 MGD; and
3. Discharge from said treatment works at the location specified on the attached map via Outfall 001 into
the Mud Creek, classified C waters in the French Broad River Basin and 06010105 HUC.
Page 2 of 20

DocuSign Envelope ID: 3D9AD657-E1DC-4528-8F7A-707C3F2B8694
Permit NCO025534
PART
A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [4.8 MGD]
[15A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.]
Grade IV Biological Water Pollution Control System [15A NCAC 08G .0302]
(a.) During the period beginning on the effective date of the permit and lasting until expansion to 6.0
MGD or permit expiration, whichever is sooner, the Permittee is authorized to discharge treated
municipal . and industrial wastewater from Outfall 001. Such discharges shall be limited and
monitored' by the nermittee as specified below:
EFFLUENT LIMITS
MONITORING REQUIREMENTS
PARAMETER
Monthly
Weekly
Daily
Measurement
Sample
Sample
Parameter Code
Average
Average
Maximum
Frequency
Type
Location2
Flow 50050
4.8 MGD
Continuous
Recording
I or E
BOD, 5-day, 20°C 3 C0310
10.0 m
15.0 mgtL
Dail y
Composite
p
I and E
(Apr 1 - Oct 31)
BOD, 5-day, 20°C 3 C0310
20.0 mg/L
30.0 mg/L
Daily
Composite
I and E
(Nov 1 - Mar 31)
Total Suspended Solids (TSS) 3 C0530
30.0 mg/L
45.0 mg/L
Daily
Composite
I and E
Ammonia (NH3 as N)
C0610
2.0 mg/L
6.0 mg/L
Daily
Composite
E
(Apr 1 -Oct 31)
Ammonia (NH3 as N) C0610
4.0 mg/L i
12.0 mg/L
Daily
Composite
E
(Nov 1 - Mar 31)
Dissolved Oxygen (DO) 00300
Daily Average >_ 5.0 mg/L
Daily
Grab
E
Fecal Coliform 31616
200/100 mL
400/100 mL
Daily
Grab
E
(geometric mean)
Total Residual Chlorine (TRC)4 50060
28 µg/L
Daily
Grab
E
Temperature (°C) 00010
Monitor and Report
Daily
Grab
E
pH 00400
Between 6.0 and 9.0 Standard Units
Daily
Grab
E
Conductivity (µmhos/cm) 00094
Monitor and Report
Daily
Grab
E
Total Kieldahl Nitrogen (TKN) 00625
Monitor and Report
Quarterly
Composite
E
(mg/L)
Nitrate+Nitrite (NO3-N + NO2-N) 00630
Monitor and Report
Quarterly
Composite
E
(mg/L)
Total Nitrogen S (mg/L) C0600
Monitor and Report
Quarterly
Calculated
E
Total Phosphorus (mg/L) C0665
Monitor and Report
Quarterly
Composite
E
Total Copper (µg/L) 01042
Monitor and Report
Monthly
Composite
E
Total Hardness (as CaCO3) 6 00900
Monitor and Report
Quarterly
Composite
E
(mg/L)
1,4-Dioxane 7 82388
Monitor and Report
Quarterly
Grab
E
PFAS 8 (ng/L) various
Monitor and Report
Quarterly B
Grab
E
Chronic Toxicity 9 TGP3B
Monitor and Report
Quarterly
Composite
E
Effluent Pollutant Scan 10 NCO]
Monitor and Report
Footnote 10
Footnote 10
E
Total Hardness (as CaCO3)11 00900
Monitor and Report
Quarterly
Grab
U
(mg/L)
Dissolved Oxygen (mg/L) 00300
Monitor and Report
Variable2
Grab
U and D
Temperature °C 00010
Monitor and Report
Variable2
Grab
U and D
Conductivity (µmhos/cm) 00094
Monitor and Report
Variable2
Grab
U and D
Fecal Coliform (#/100mL) 31616
Monitor and Report
Variable2
Grab
U and D
(geometric mean)
Footnotes on next page.
Page 3 of 20

DocuSign Envelope ID: 3D9AD657-E1DC-4526-6F7A-707C3F2B8694
Permit NC0025534
Footnotes:
1. The Permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. See Special Condition A.(8.).
2. Sample locations: I = Influent; E = Effluent; U = Upstream in Mud Creek above the outfall; D = Downstream at
NCSR 1365 (North Rugby Rd). 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.
3. The monthly average effluent BODS and TSS concentrations shall not exceed 15% of the respective influent value
(85% removal).
4. The facility shall monitor TRC when using chlorination for disinfection. The Division shall consider all effluent
total residual chlorine values reported below 50 µg/L 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.
5. 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.
6. Effluent Total Hardness sampling should be performed in conjunction with metals sampling.
7. Samples shall be analyzed and reported using sufficiently sensitive test procedures (i.e., methods) approved under
40 CFR Part 136 for the analysis of pollutants or pollutant parameters.
8. Follow Special Condition A.(7.).
9. Chronic Toxicity (Ceriodaphnia dubia) P/F at 18% with testing in February, May, August and November. See
Special Condition A.(3.).
10. The Permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition
A.(4.).
11. The Permittee shall sample instream hardness upstream of the facility's discharge. The sample shall be
representative of the hardness in the stream. Effluent hardness shall be performed in conjunction with testing for
hardness dependent metals (cadmium, copper, lead, nickel, silver, and zinc).
(b.) There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 4 of 20

DocuSign Envelope ID: 3D9AD657-E1DC4528-8F7A-707C3F2B8694
Permit NCO025534
A.(2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS 16.0 MGD]
[15A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.]
Grade IV Biological Water Pollution Control System [15A NCAC 08G .0302]
(a.) During the period beginning on the effective date of the permit and lasting until expansion to 6.0
MGD or permit expiration, whichever is sooner, 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 Code
EFFLUENT LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location2
Flow 50050
6.0 MGD
Continuous
Recording
I or E
BOD, 5-day, 20°C 3 CO310
(Apr 1 - Oct 31)
10.0 mg/L
15.0 mg/L
Daily
Composite
I and E
BOD, 5-day, 200C 3
CO310
(Nov 1 - Mar 31)
20.0 mg/L
30.0 mg/L
Daily
Composite
I and E
Total Suspended Solids (TSS) 3 CO530
30.0 mg/L
45.0 mg/L
Daily
Composite
I and E
Ammonia (NH3 as N)
(Apr 1 -Oct 31) CO610
2.0 mg/L
6.0 mg/L
Daily
Composite
E
Ammonia (NH3 as N)
CO610
(Nov 1 - Mar 31)
4.0 mg/L
12.0 mg/L
Daily
Composite
E
Dissolved Oxygen (DO) 00300
Daily Average > 5.0 mg/L
Daily
Grab
E
Fecal Coliform 31616
(geometric mean)
200/100 mL
400/100 mL
Daily
Grab
E
Total Residual Chlorine (TRC) ° 50060
28 µg/L
Daily
Grab
E
Temperature (°C) 00010
Monitor and Report
Daily
Grab
E
pH 00400
Between 6.0 and 9.0 Standard Units
Daily
Grab
E
Conductivity (µmhos/cm) 00094
Monitor and Report
Daily
Grab
E
Total Kjeldahl Nitrogen (TKN)
(mom) 00625
Monitor and Report
Quarterly
Composite
E
Nitrate+Nitrite (NO3-N + NO2-N) 00630
(mg/L)
Monitor and Report
Quarterly
Composite
E
Total Nitrogen s (mg/L) CO600
Monitor and Report
Quarterly
Calculated
E
Total Phosphorus (mg/L) CO665
Monitor and Report
Quarterly
Composite
E
Total Copper (µg/L) 01042
Monitor and Report
Monthly
Composite
E
Total Hardness (as CaCO3)' 00900
(mg/L)
Monitor and Report
Quarterly
Composite
E
1,4-Dioxane 7 82388
Monitor and Report
Quarterly
Grab
E
PFAS 8 (ng/L) various
Monitor and Report
Quarterly s
Grab
E
Chronic Toxicity v TGP3B
Monitor and Report
Quarterly
Composite
E
Effluent Pollutant Scan 10 NCO]
Monitor and Report
Footnote 10
Footnote 10
E
Total Hardness (as CaCO3)11 00900
(mg/L)
Monitor and Report
Quarterly
Grab
U
Dissolved Oxygen (mg/L.) 00300
Monitor and Report
Variable2
Grab
U and D
Temperature °C 00010
Monitor and Report
Variable2
Grab
U and D
Conductivity (µmhos/cm) 00094
Monitor and Report
Variable'
Grab
U and D
Fecal Coliform (#/100mL) 31616
(geometric mean)
Monitor and Report
Variable'
Grab
U and D
Footnotes on next page.
Page 5 of 20

DocuSign Envelope ID: 3D9AD657-El DG4528-8RA-707OF2138694
Permit NC0025534
Footnotes:
1. The Permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. See Special Condition A.(8.).
2. Sample locations: I = Influent; E = Effluent; U = Upstream in Mud Creek above the outfall; D = Downstream at
NCSR 1365 (North Rugby Rd). 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.
3. The monthly average effluent BODS and TSS concentrations shall not exceed 15% of the respective influent value
(85% removal).
4. The facility shall monitor TRC when using chlorination for disinfection. The Division shall consider all effluent
total residual chlorine values reported below 50 µg/L 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.
5. 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.
6. Effluent Total Hardness sampling should be performed in conjunction with metals sampling.
7. Samples shall be analyzed and reported using sufficiently sensitive test procedures (i.e., methods) approved under
40 CFR Part 136 for the analysis of pollutants or pollutant parameters.
8. Follow Special Condition A.(7.).
9. Chronic Toxicity (Ceriodaphnia dubia) P/F at 21 % with testing in February, May, August and November. See
Special Condition A.(3.).
10. The Permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition
A.(4.).
11. The Permittee shall sample instream hardness upstream of the facility's discharge. The sample shall be
representative of the hardness in the stream. Effluent hardness shall be performed in conjunction with testing for
hardness dependent metals (cadmium, copper, lead, nickel, silver, and zinc).
(b.) There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 6 of 20

DocuSign Envelope ID: 3D9AD657-E1DC-4528-8F7A-707C3F2B8694
Permit NCO025534
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 18% at 4.8 MGD and 21% at 6.0 MGD.
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 H 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 TGP313
for the pass/fail results and THP3I3 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.
Page 7 of 20

DocuSign Envelope ID: 3D9AD657-E1DC-4528-8F7A-707C3F2B8694
Permit NC0025534
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 8 of 20

DocuSign Envelope ID: 3D9AD657-E1DC-4528-8F7A-707C3F2B8694
Permit NCO025534
A.(4.) ADDITIONAL MONITORING REQUIREMENTS FOR PERMIT RENEWAL
[NCGS 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: 2025,
2026, and 2027. 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], 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
Chlorine (total residual, TRC)
50060
1, 1 -dichloroethylene
34501
Bis (2-chloroisopropyl) ether
Dissolved oxygen
00300
1,2-dichloropropane
C0541
Bis (2-ethythexyl) phthalate
Nitrate / Nitrite
00630
1,3-dichloropropylene
77163
4-bromophenyl phenyl ether
Kjeldahl nitrogen
00625
Ethylbenzene
34371
Butyl benzyl phthalate
Oil and grease
00556
Methyl bromide
34413
2-chloronaphthalene
Phosphorus
C0665
Methyl chloride
34418
4-chlorophenyl phenyl ether
Total dissolved solids
70295
Methylene chloride
34423
Chrysene
Hardness
00900
1,1,2,2-tetrachloroethane
81549
Di-n-butyl phthalate
Antimony
01097
Tetrachloroethylene
34475
Di-n-octyl phthalate
Arsenic
01002
Toluene
34010
Dibenzo(a h)anthracenc
Beryllium
01012
1, 1, 1 -trichloroethane
34506
1,2-dichlorobenzene
Cadmium
01027
1,1,2-trichloroethane
34511
1,34chlorobenzene
Chromium
C0034
Trichloroethylene
39180
1,4-dichlorobenzene
Copper
01042
Vinyl chloride
39175
3,3-dichlorobenzidine
Lead
01051
Acid -extractable compounds:
Diethyl phthalate
Mercury (Method 1631E)
COMER
P-chloro-m-cresol
34452
Dimethyl phthalate
Nickel
01067
2-chlorophenol
34586
2,4-dinitrotoluene
Selenium
01147
2,4-dichlorophenol
34601
2,6-dinitrotoluene
Silver
01077
2,4-dimethylphenol
34606
1,2-diphenylhydrazine
Thallium
01059
4,6-dinitro-o-cresol
34657
Fluoranthene
Zinc
01092
2,4-dinitrophenol
34616
Fluorene
Cyanide
00720
2-nitrophenol
34591
Hexachlorobenzene
Total phenolic compounds
32"0
4-nitrophenol
34646
Hexachlorobutadiene
Volatile oreanic compounds:
Pentachlorophenol
39032
Hexachlorocyclo-pentadiene
Acrolein
34210
Phenol
34694
Hexachloroethane
Acrylonitrile
34215
2,4,6-trichlorophenol
34621
Indeno(1,2,3-cd)pyrene
Benzene
34030
Base -neutral compounds:
Isophorone
Bromoform
32104
Acenaphthene
34205
Naphthalene
Carbon tetrachloride
32102
Acenaphthylene
34200
Nitrobenzene
Chlorobenzene
34301
Anthracene
CO220
N-nitrosodi-n-propylamine
Chlorodibromomethane
34306
Benzidine
39120
N-nitrosodimethylamine
Chloroethane
85811
Benzo(a)anthracene
C0526
N-nitrosodiphenylamine
2-chloroethyl vinyl ether
34576
Benzo(a)pyrene
34247
Phenanthrene
Chloroform
32106
3,4 benzofluoranthene
34230
Pyrene
Dichlorobromomethane
32101
Benzo(ghi)perylene
34521
1,2,4-trichlorobenzene
1,1-dichloroethane
34496
Benzo(k)fluoranthene
34242
1,2-dichloroethane
32103
Bis (2-chloroethoxy) methane
34278
Page 9 of 20
34273
34283
C0100
34636
34292
34581
34641
34310
39110
34596
34556
34536
34566
34571
34631
34336
34341
34611
C0626
34346
C0376
34381
C0700
C0702
34386
34396
34403
34408
34696
34447
34428
34438
34433
34461
34469
C0551

DocuSign Envelope ID: 3D9AD657-E1DC-4528-8F7A-707C3F2B8694
Permit NC0025534
(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 1 - 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:Hedocs.deq.nc.gov/Forms/NPDES—WW-EDMR-Supplemental-Form
(c.) 2" pecies Toxicity Testing and Reporting.
(i.) In addition to the quarterly toxicity tests required in Condition A.(3.) CHRONIC TOXICITY
PERMIT LIMIT, 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.
(ii.) The 2°d 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
A.(3.) CHRONIC TOXICITY PERMIT LIMIT; 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 10 of 20

DocuSign Envelope ID: 3D9AD657-E1DC-4528-8F7A-707C3F2B8694
Permit NCO025534
A.(5.) MERCURY NIINIMIZATION PLAN (MMP)
[NCGS 143-215.1 (b)]
The Permittee shall maintain and continue to implement the Mercury Minimization Plan (NO") 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.(6.) REOPENER FOR 1,4-DIOXANE
[NCGS 143-215.1 (b)]
Pursuant to N.C. General Statutes Section 143-215.1 and the implementing rules found in the North
Carolina Administrative Code at 15A NCAC 211.0112 (b) (1) and 2H.0114 (a) and Part 11, Sections B-12
and B-13 of this permit, the Director of DWR may reopen this permit to modify permit requirements to
address 1,4-Dioxane monitoring, treatment and/or compliance.
A.(7.) PFAS MONITORING REQUIREMENT
[NCGS 143-215.1(b)]
(a.) In the absence of an approved 40 CFR Part 136 method published in Federal Register, influent and
effluent PFAS monitoring shall be conducted. The 31 draft or more recent wastewater analytical
method 1633 (see 40 CFR 122.21(e)(3xii) and 40 CFR 122.44(ixl)(iv)(B)) shall be used and shall
include all target analytes listed under Table 1 of the method until such time as the Permittee uses the
approved PFAS Method for wastewater. Effective the first full calendar quarter following six (6)
months after EPA publishes a 40 CFR Part 136 PFAS Method for wastewater in the Federal Register,
influent and effluent PFAS monitoring shall be conducted using the approved EPA PFAS Method
1633. See Appendix A for list of analytes.
(b.) Influent and effluent monitoring using the unapproved 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 A has been added to the permit to identify the current analytes listed under Table 1 of Method
1633 Analysis of Per- and Polyfluoroalkyl Substances (PFAS) in Aqueous, Solid, Biosolids, and Tissue
Samples by LC-MS/MS (EPA, January 2024) 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.govlsystem/files/documentsl2024-01/method-1633-final-for-web-posting.pdf
PFAS Monitoring using the January 2024 Method 1633 shall be reported quarterly using the Division -
provided submittal form. Once PFAS monitoring is conducted using the PFAS Method 1633 in 40 CFR
Part 136, data shall be reported in the monthly eDMRs.
Page 11 of 20

DocuSign Envelope ID: 3D9AD657-E1DC-4528-8F7A-707C3F2B8694
Permit NC0025534
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 Method 1633 can be found by
contacting the individual associations. Please note that different labs are accredited for different
matrices.
Sampling and Analytical Notes:
• 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.
• '7 flag values shall be reported when the "J" flag value is associated with the method's upper
bound. "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. Ns 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 (Stu) in the approved
pretreatment program in industry categories expected or suspected of PFAS discharges to the
Hendersonville WWTP; and begin sampling of and modify Industrial User Permits (IUPs) for
each SIU identified as suspected of PFAS discharges to the Hendersonville WWTP 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)).
Page 12 of 20

DocuSign Envelope ID: 3D9AD657-El DC-4528-8HA-707C3F2B8694
Permit NC0025534
(i.) The Pennittee shall begin sampling of and/or issue IUPs for each indirect discharger identified
as suspected of PFAS discharges to the Hendersonville WWTP to ensure sampling begins
within six months of completion of the IWS.
(ii.) The Division has determined that all S1Us 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.
(iii.) The Permittee shall ensure that IUPs within the Hendersonville WWTP service area are
modified or reissued, new IUDs are issued, and other Pretreatment Program mechanisms are
completed to address PFAS discharges to POTWs.
(iv.) 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
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)).
Page 13 of 20

DocuSign Envelope ID: 3D9AD657-E1DC-4528-8F7A-707C3F2B8694
Permit NCO025534
A. (8.) INSTREAM ASSESSMENT OF BIOLOGICAL INTEGRITY
[15A NCAC 02B .0200 et seq.]
(a.) Within 180 days of the permit effective date, the Permittee shall submit a study plan to assess biological
integrity in the receiving water both upstream and downstream of the outfall via benthic
macroinvertebrate (benthos) sampling and analysis. The study plan shall include methodologies
consistent with DWR-approved assessment methodologies' and propose an assessment schedule and
sampling location(s). The study plan shall be submitted to the Division at the address listed under (e.)
of this section. Once DWR-NPDES approves the study plan, it shall be used for all assessments unless
a study plan modification is approved/recommended by the Division. Instream biological integrity
assessments shall be conducted by a laboratory or entity that is NC -certified for the procedure.
(b.) Within 180 days of issuance of the Authorize to Construct (AtC) permit for expansion to 6.0 MGD
flow, the Permittee shall conduct an instream benthos assessment at a point upstream and
downstream of Outf tll 001 at the locations identified in Section A.(L).
(c.) Within 180 days after the facility begins discharging at the 6.0 MGD expansion flow (i.e., upon receipt
of the Engineer's Certification of construction completion for the 6.0 MGD flow), the Permittee shall
conduct an instream benthos assessment at a point upstream and downstream of Outfall 001 at the
locations identified in Section A.(L).
(d.) With each planned assessment, the Permittee shall provide sufficient notice of sampling to the Division
so that Division personnel may attend and share samples collected.
(e.) The Permittee shall submit instream biological integrity assessment reports within 60 days of
completion. All reports shall include the owner's name, NPDES permit number and Permittee contact
person, and shall be submitted to:
(1) NCDEQ / Division of Water Resources
NPDES Permitting — Municipal Branch
1617 Mail Service Center
Raleigh, NC 27699-1617
(2) NCDEQ / Division of Water Resources
Asheville Regional Office - WQRO
2090 U.S. 70 Highway
Swannanoa, NC 28778-8211
(f.) The addition of instream biological integrity assessment requirement does not preclude the Division
from taking any action necessary to resolve any ongoing compliance activity or effluent violations.
Footnote.
1. NC Department of Environmental Quality. 2016. Standard Operating Procedures for the Collection and
Analysis of Benthic Macroinvertebrates. Division of Water Resources. Raleigh, North Carolina. February
2016.
Page 14 of 20

DocuSign Envelope ID: 3D9AD657-E1DC4528-8F7A-707C3F2B8694
Permit NCO025534
A.(8.) ELECTRONIC REPORTING - DISCHARGE MONITORING REPORTS
[NCGS 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 H 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 1SuRersedes 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://deg.nc.yov/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 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.
Page 15 of 20

DoeuSign Envelope ID: 3D9AD657-E1DC-4528-8F7A-707C3F2B8694
Permit NC0025534
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:
hops://www. federalregister.mov/documentsl20 l 5l l Ol2212015-24954/national-pol lutant-discharge-
el imination-system-npdes-electronic-resorting,-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://deg.nc.�lov/abouudivisions/water-resources/edmr
4. Signatory Requirements ISuimlements Section B. OL) (b) and Supersedes Section B. (11.) Ml
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
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:
Page 16 of 20

DocuSign Envelope ID: 3D9AD657-E1DC-4528-8F7A-707C3F2BB694
Permit NCO025534
"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.)1
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 ].
Page 17 of 20

DocuSign Envelope ID: 3D9AD657-E1DC-4528-8F7A-707C3F2B8694
Permit NCO025534
ountain Iiotne s , Ew'om t ,
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NC00025534 - City of Hendersonville WWTP
Latitude: 35`21'11"N Receiving Stream: Mud Creek
Facility x
Location
Longitude: 82' 27'52" W Stream Class: C
Quad#: F9SW/Hendersonville River Basin: FrenchBroa
County: Henderson 8•01p1t HUC: 06010105
Permitted Flow: 4.8 and 6.0 MGD
North Not t0 Scale
Page 18 of 20

DocuSign Envelope ID: 3D9AD657-E1DC-4528-8F7A-707C3F2B8694
Permit NCO025534
Appendix A. PFAS Target Analytes EPA Method 1633
(EPA, January 2024)
Target Analyte Name
Abbreviation
CAS Number
Parameter
Code
Perfluoroalkyl carboxylic acids
Perfluorobutanoic acid
PFBA
375-224
51522
Perfluoropentanoic acid
PFPeA
2706-90-3
51623
Perfluorohexanoic acid
PFHxA
307-244
51624
Perfluorohepanoic acid
PFHpA
375-85-9
51625
Perfluorooctanoic acid
PFOA
335-67-1
51521
Perfluorononanoic acid
PFNA
375-95-1
51626
Perfluorodexanoic acid
PFDA
335-76-2
51627
Perfluoroundecanoic acid
PFUnA
2058-94-8
51628
Perfluorododecanoic acid
PFDoA
307-55-1
51629
Perfluorotidecanoic acid
PFTrDA
72629-94-8
51630
Perfluorotetradecanoic acid
PFTeDA
376-06-7
51531
Perfluoroalkyl sulfonic acids
Perfluorobutanesulfonic acid
PFBS
375-73-5
52602
Perfluoropentanesulfonic acid
PFPeS
2706-914
52610
Perfluorohexanesulfonic acid
PFHxS
355464
52605
Perfluoroheptanesulfonic acid
PFHpS
375-92-8
52604
Perfluorooctanesulfork 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
757124-724
52607
I H, I H,2H,2H-Perfluorooctane sulfonic acid
6:2FTS
27619-97-2
52608
1H,1H,2H,2H-Perfluorodecane sulfonic acid
8:217TS
39108-344
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.
Page 19 of 20

DocuSign Envelope ID: 3D9AD657-E1DC-4528-8F7A-707C3F2B8694
Permit NCO025534
Table continued from Appendix A. PFAS Target Analytes EPA Method 1633 (EPA, January 2024).
Target Analyte Name
Abbreviation
CAS Number
EParameter
Code
Perfluorooctane sulfonamidoneetic acids
N-methyl perlluoroocianesulfonamidoacetic 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
Perlfiioro-4-methoxybutanoic acid
PFMBA
863090-89-5
PF006
Nonafluoro-3,6-dioxaheptanoic acid
NFDHA
151772-58-6
52626
Ether sulfonic acids
9-Chlorohexadecafluoro-3-oxanonane- I -sulfonic acid
9CI-PF30NS
756426-58-1
PF003
11-Chloroeicosafluoro-3-oxaundecane-I-sulfonic acid
11CI-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-Perfluoroheptyl propanoic acid
7:3FTCA
812-704
PF005
Page 20 of 20