NC0021181_Draft Permit_20240820

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
Mr. Miles Braswell, City Manager
City of Belmont
P.O. Box 431
Belmont, North Carolina 28012
Dear Mr. Braswell:
NORTH Wkwww to Qua
lity
August 20, 2024
Subject: Draft NPDES Permit Renewal
Permit NCO021181
Belmont WWTP
Gaston County
Grade W 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:
• Based on the reasonable potential analysis (RPA) showing no reasonable potential to
violate state water quality standards, the monitoring requirement for cyanide has been
removed from the permit [See A.(1)].
• Per the results of instream waste concentration (IWC)-based calculations for ammonia -
nitrogen, ammonia nitrogen limits have added to the permit [See A.(1.)].
• Some of the wording has changed in Special Condition A.(2.), Chronic Toxicity Permit
Limit, please review each paragraph carefully.
• Special Condition A. (6.) has been modified to include the specific three years in which
the Effluent Pollutant Scan shall be performed (2026, 2027, and 2028). 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.
• A special condition to monitor effluent PFAS chemicals quarterly has been added to the
permit, to be effective six (6) months after EPA has a wastewater method in 40 CFR136
method published in the Federal Register [See Special Condition A.(7.) PFAS
Monitoring Requirements].
• Language has been added to Footnote 1 to account for influent, effluent, upstream and
downstream abbreviations [See A. (1.)].
• Some of the wording has changed in Special Condition A. (2.), Chronic Toxicity Permit
Limit, 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.
D.�EQ North Carolina Department ofEnvironmental Quality I Division ofWater Resources
S12 North Salisbury Strat 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
rvonTM c.wou
919.707.9000

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. (6.)].
Parameter codes have been added to the Effluent Limitations and Monitoring Requirements
[ See A. (1.)].
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
httsp .//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 Gaston 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,
DocuSiyned by:
Uvua.
..
Urva Patel, Environmental Engineer II
NPDES Municipal Permitting Unit
Division of Water Resources, NCDEQ
Hardcopy: NPDES Files
Ecopy: US EPA Region 4
DWR/Mooresville Regional Office/Water Quality/Andrew Pitner
DWR/Operator Certification Program/Jeff Talbot
DWR/Ecosystems Branch/Tammy Hill
DWR/Aquatic Toxicology Branch/Cindy Moore & Molly Nicholson
DWR/Municipal Permitting Unit/Keyes McGee
South Carolina/DES-BOW/Brenda Green
North Carolina Department of Environmental Quality I Division of Water Resources
jj�D EQ �� 512 North Salisbury Street k 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
ULINA _
a s�wnmmomsi o,,, \� 919.707.9000

Permit NC0021181
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
(NPDES)
In compliance with the provisions of North Carolina General Statute I4215.1, other lawful standards
and regulations promulgated and adopted by the North Carolina E ental Management
Commission, and the Federal Water Pollution Control Act, ai ; _`ended, the
City of Belmont
is hereby authorized to discharge wastewater from a facility located at
Belmont Wastewater Treatment Plant
298 Parkdale Drive
Belmont
Gaston County
to receiving waters designated as the Catawba River in the Catawba 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 become effective............ Month xx, 2024.
This permit an(f rization to discharge shall expire at midnight on June 30, 2029.
Signed this day Mbttth xx, 2024.
DRAFT
Michael J. Montebello, NPDES Permitting Branch Chief
Division of Water Resources
Page 1 of 19

Permit NCO021181
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 effective date, 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.
City of Belmont
is hereby authorized to:
1. Continue to operate and maintain the Belmont WWTP an existing 5.0 MGD facility consisting of the
following components:
• Mechanical bar screen with bypass
• Caustic addition system
• Influent flow recorder with Parshall Flume Meter
• Influent composite sampler
• Mechanical grit removal system
• Dual aeration basins with mechanical aerators
• Dual secondary clarifiers
• RAS/WAS pumps
• Chlorine contact basin
• Dechlorination system
• Effluent flow recorder with Parshall Flume Meter
• Effluent composite sampler
• Dual aerobic sludge digestors
• Sludge holding tank with truck load out station
• Sludge drying beds
• Standby power generator
2. Discharge from said treatment works at the location specified on the attached map via Outfall 001
into the Catawba River, classified as WS-IV; B, CA waterbody in the Catawba River Basin and
03050101 HUC.
Page 2 of 19

Permit NCO021181
PART
A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [5.0 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 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
5.0 MGD
Continuous
Recording
I or E
Total Monthly Flow (MG) 82220
Monitor and Report
Monthly
Calculated
E
BOD, 5 day, 20°C 3 C0310
30.0 mg/L
45.0 mg/L
Daily
Composite
I and E
Total Suspended So1ids3 C0530
30.0 mg/L
45.0 mg/L
Daily
Composite
I and E
NH3 as N C0610
10.6 mg/L
31.8 mg/L
Daily
Composite
E
Total Residual Chlorine 50060
28 µg/L
Daily
Grab
E
Fecal Coliform
(geometric mean) 31616
200/100
400/I00 mL
Daily
Grab
E
Dissolved Oxygen 00300
Monitor and Report
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
Conductivity (µmhos/cm) 00094
Monitor and Report
Daily
Grab
E
TKN (mg/L) 00625
Monitor and Report
Weekly
Composite
E
NOs-N + NO2-N (mg/L) 00630
Monitor and Report
Weekly
Composite
E
Total Nitrogen S (mg/L) C0600
Monitor and Report
Weekly
Calculated
E
QM600
TN Load 6,7 QS600
QS600
Monitor and Report (lb/month)
88,656 lb/summer
115,449lb/winter
Monthly
Seasonally
Seasonally
Calculated
E
Total Phosphorus (mg/L) C0665
Monitor and Report
Weekly
Composite
E
TP Load (lb/month) 6,7 QM655
QY665
Monitor and Report
21,309 lb/yr
Monthly
Annually
Calculated
E
Chronic Toxicity a TGP3B
Monitor and Report
Quarterly
Composite
E
Effluent Pollutant Scan' NC01
Monitor and Report
Footnote 9
Footnote 9
E
Hardness10 -Total as CaCOs (mg/L) 00900
Monitor and Report
Quarterly
Composite
E
PFAS Variable
Footnote 11
Footnote 11
Grab
E
Hardness10 -Total as CaCO3 (mg/L) 00900
Monitor and Report
Quarterly
Composite
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
Variable2
Grab
U and D
Fecal Coliform (#/100mL) 31616
Monitor and Report
Variable2
Grab
U and D
Footnotes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. See Special Condition A.(9.).
Footnotes continue on the next page.
Page 3 of 19

Permit NC0021181
Footnotes continued from A.(1.) Effluent Limitations and Monitoring Requirements:
2. Sample locations I -Influent, E-Effluent, U-Upstream = at U.S. Highway 74 bridge, D-Downstream = one mile
from discharge. 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 Total Suspended Solids 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. TN or TP Load is the mass quantity of Total Nitrogen or Total Phosphorus discharged in a given period of time.
See Special Condition A. (5.), Calculation of TN or TP Loads. Load limits are based on allocations; see Special
Condition A. (3.) Nutrient Allocation, and A. (4.) Total Nitrogen and Total Phosphorus Limits.
7. Summer is defined as April 1 — October 31; winter is defined as November 1 — March 31. Annual is defined as
on a calendar year basis: January 1— December 31.
8. Chronic Toxicity (Ceriodaphnia dubia) P/F at 8% with testing in February, May, August, and November. See
Special Condition A.(2.).
9. The permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition
A.(6.).
10. 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, chromium, copper, lead, nickel, silver and zinc).
11. See Special Condition A.(7.).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 4 of 19

Permit NC0021181
A.(2.) 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 8%.
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 Il 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 5 of 19

Permit NCO021181
A. (3.) NUTRIENT ALLOCATIONS
[NCGS 143-215.1(B)]
The following table lists the Total Nitrogen (TN) and Total Phosphorus (TP) allocations assigned to,
acquired by, or transferred to the Permittee in accordance with the 1995 Lake Wylie TMDL and nutrient
management strategy and the status of each as of permit issuance. For compliance purposes, this table does
not supersede any TN or TP limit established elsewhere in this permit.
Total Nitrogen Allocation
ALLOCATION
DISCHARGE
DISCHARGE
TYPE
SOURCE
DATE
ALLOCATION
ALLOCATION
STATUS
SUMMER'
WINTER'
Base
TMDL
1995
74,960lb/season
105,785lb/yr
Active
Transfer by
Supplemental
agreement from
5/3/2018
13,696 lb/season
9,6641b/yr
Active
City of Charlotte
Total
Allocation 1
88,656 lb/season
115,449 Ib/yr
Mixed
Footnote:
1. Summer is defined as April 1— October 31. Winter is defined as November 1 —March 31.
Total Phosphorus Allocation
DISCHARGE
ALLOCATION
SOURCE
DATE
ALLOCATION
STATUS
TYPE
ANNUAL'
Base
TMDL
199�
? 1.309 lb y r
Active
Total Allocation
2l. ',09 lb/yr
I Active
Footnote:
1. Annual means on a calendar year basis. JdnUarN I — December 31.
Any addition, deletion, or modification of the listed allocation(s) (other than to correct typographical errors)
or any change in status of any of the listed allocations shall be considered a major modification of this
permit and shall be subject to the public review process afforded such modifications under state and federal
rules.
Page 6 of 19

Permit NCO021181
A. (4.) TOTAL NITROGEN AND TOTAL PHOSPHORUS LIMITS
[NCGS 143-215.1(B)]
Total Nitrogen (TN) allocations and load limits for NPDES dischargers in the Lake Wylie watershed are
seasonal (summer and winter) values. Summer is defined as April 1 through October 31, and winter is
defined as November 1 through March 31. Total Phosphorus (TP) allocations and load limits are annual
values and apply on a calendar year basis, January 1 through December 31.
(a.) The TN (or TP) Load limit in this Permit may be modified as the result of allowable changes in the
Permittee's allocation.
(i.) Allowable changes include those transfers resulting from the purchase, sale, trade, or lease of
allocation between the Permittee and other dischargers assigned allocation under the 1995
Lake Wylie TMDL; regionalization (if both facilities were assigned allocation); and other
transactions approved by the Division.
(ii.) The Permittee may request a modification of the TN (or TP) Load limit in this Permit to reflect
allowable changes in its allocation.
(A) The request must include an analysis demonstrating that change in allocations and
limits does not have a reasonable potential to cause localized water quality impacts.
(B) Upon receipt of timely and proper application, the Division will propose to modify
the permit as appropriate and in accordance with state and federal program
requirements.
(C) Changes in TN or TP limits become effective on the first January 1 (annual limit),
the first April 1 (summer limit), or the first November 1 (winter limit) following
permit modification. The Division must receive application no later than 180 days
prior to the requested effective date for any limit change.
(iii.) Any requests for modification should be sent to:
North Carolina Division of Water Resources
NPDES Programs
1617 Mail Service Center
Raleigh, NC 27699-1617
Page 7 of 19

Permit NCO021181
A. (5.) CALCULATION AND REPORTING OF TOTAL NITROGEN AND TOTAL
PHOSPHORUS LOADS
[G.S. 143-215.1(B)]
The Permittee shall calculate monthly, seasonal, and annual TN (or TP) Loads as follows:
Monthly TN (or TP) Load (lb/mo.) = TN (or TP) x TNT x 8.34, where:
TN or TP = the average Total Nitrogen or Total Phosphorus concentration (mg/L) of the
composite samples collected during the month;
TMF = the Total Monthly Flow of wastewater discharged during the month
(MG/mo.); that is, the sum of daily flows in the month;
8.34 = conversion factor, from (mg/L x MG) to pounds.
Summer TN Load (lb/summer) = Sum of the April —October M6Wy TN Loads for the season;
Winter TN Load (lb/winter) = Sum of the November —March Mont* —,TN Loads for the season;
Annual TP Load (lb/yr) = Sum of the 12 Monthly TP,oads for the dar year.
The Permittee shall report monthly TN and TP results (mg/L and lb/mo) in the appropriate discharge
monitoring report for each month: the summer TN results with the October DMR; the winter TN results
with the March DMR; and each calendar year's results with the December report for that year.
Any addition, deletion, or modification of the listed al location(s) (other than to correct typographical errors)
or any change in status of any of the listed allocations shall be considered a major modification of this
permit and shall be subject to the public review process afforded such modifications under state and federal
rules.
Page 8 of 19

Permit NCO021181
A.(6.) 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: 2026,
2027, and 2028. 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.(2.) (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
Chlorine (total residual, TRC)
50060
1,1-dichloroethylene
34501
Bis (2-chloroisopropyl) ether
Dissolved oxygen
00300
1,2-dichloropropane
C0541
Bis (2-ethylhexyl) 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)anthracene
Beryllium
01012
1,1,1-trichloroethane
34506
1,2-dichlorobenzene
Cadmium
01027
1,1,2-trichloroethane
34511
1,3-dichlorobenzene
Chromium
C0034
Triehloroethylene
39180
1,4-dichlorobenzene
Copper
01042
Vinyl chloride
39175
3,3-dichlorobenzidine
Lead
01051
Acid -extractable compounds:
Diethyl phthalate
Mercury (Method 1631 E)
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
32730
4-nitrophenol
34646
Hexachlorobutadiene
Volatile organic 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-chlomethyl 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 19
34273
34283
C0100
34636
34292
34581
34641
34320
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

Permit NCO021181
(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: hUs://edocs.deg.nc.gov/Forms/NPDES WW-EDMR-
Supplemental-Form
(c.) 2"LSpecies Toxicity Testing and Reportine.
(i.) In addition to the quarterly toxicity tests required in Condition A.(2.) (CHRONIC TOXICITY
PERMIT LIMIT (QUARTERL19), 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 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 (QUARTERLY)); 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, ATForms.ATBAdeq.nc.gov. .
(iv.) Results of the 2nd 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.
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Permit NC0021181
A.(7.) PFAS MONITORING REQUIREMENT AND PRETREATMENT
[G.S. 143-215.1 (b)]
(a.) In the absence of an approved 40 CFR Part 136 method published in Federal Register, influent and
effluent HAS monitoring shall be conducted. The 31 draft or more recent wastewater 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 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, effluent
PFAS monitoring shall be conducted using the approved EPA HAS Method 1633. See Appendix A for
list of analytes.
(b.) Influent and 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 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.gov/system/files/documents/2024-01 /method-1633-final-for-web-posting.Rdf
HAS Monitoring using the Draft Method or January 2024 Method 1633 shall be reported quarterly
using the Division -provided submittal form. Once PFAS monitoring is conducted using the EPA
Method 1633 in 40 CFR Part 136, 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 Method 1633 can be
found by contacting the individual associations. Please note that different labs are accredited for
different matrices.
Sampling and Analvtical 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.
• "J" 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.) HAS Monitoring Applicability: Industry categories known or suspected to discharge HAS
from the EPA HAS 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
Page 11 of 19

Permit NCO021181
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
Belmont WWTP; and begin sampling of and modify Industrial User Permits (IUPs) for each
SIU identified as suspected of PFAS discharges to the Belmont 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 2025 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 Belmont WWTP 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 Belmont WWTP 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
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 12 of 19

Permit NCO021181
A.(8.) MERCURY MINIMIZATION PLAN (MMP)
[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.(9.) 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 11 of this permit
(Standard Conditions for NPDES Permits):
• Section B. (11.) Signatory Requirements
• Section D. (2.)
• Section D. (6.)
• Section E. (5.)
Reporting
Records Retention
Monitoring Reports
1. Reporting 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://deg.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.
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Permit NC0021181
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.
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.federalreizister.2ov/documents/2015/10/22/2015-
24954/national-pollutant-discharge-elimination-system-nodes-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://deg.nc.gov/about/divisions/water-resources/edmr
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Permit NC0021181
4. Sianatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)l
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II,
Section B. (I 1.)(a) or by a duly authorized representative of that person as described in Part II, Section
B. (I1.)(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://deg.nc.goy/about/divisions/water-resources/edmr
Certification. Any person submitting an electronic DMR using the state's eDMR system shall make
the following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION
WILL BE ACCEPTED:
"I certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or persons
who manage the system, or those persons directly responsible for gathering the information, the
information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am
aware that there are significant penalties for submitting false information, including the possibility of
fines and imprisonment for knowing violations. "
5. Records Retention [Supplements Section D. (6.)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 15 of 19

Permit NCO021181
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810 0' 59.7" W
Stream Class: WS-IV, B.
CA
1'07717 Facility Location
Subbasin: 03-08-34
HUC: 03050101
Belmont NL'XVTP NC0021181
Receiving Stream: Catawba River
Gaston County
Page 16 of 19

Permit NCO021181
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
375-22-4
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
Perfluoroundecanoic acid
PFUnA
2058-94-8
51628
Perfluorododecanoic acid
PFDoA
307-55-1
51629
Perfluorotridecanoic 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
355-46-4
52605
Perfluoroheptanesulfonic 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
Page 17 of 19

Permit NCO021181
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
Perfluorooetane 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.
Table continued from Appendix A. PFAS Target Analytes EPA Method 1633 (EPA, January 2024).
Target Analyte Name
Abbreviation
CAS Number
Parameter
Code
Perfluorooctane sulfonamidoseetic acids
N-methyl perfluorooetanesulfonamidoacetic acid
NMeFOSAA
2355-31-9
51644
N-ethyl perfluorooctanesulfonamidoacetic acid
NEtFOSAA
2991-50-6
51643
Perfluorooetane 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
Perlfuoro-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-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
Page 18 of 19

Permit NCO021181
Huorotelomer 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
812-70-4
PF005
Page 19 of 19