NC0081621_Draft Permit_20240308

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR. NORTH CAROLINA
Director Environmental Quality
February 6, 2024
Mr. T. Mark Fowler, Facilities Director
Water & Sewer Authority of Cabarrus County (WSACC)
6400 Breezy Lane
Concord, North Carolina 28025
Subject: Draft NPDES Permit Renewal
Permit NCO081621
Muddy Creek WWTP
Cabarrus County
Grade II/III Biological WPCS
SIC Code 4952
Dear Mr. Fowler:
Enclosed with this letter is a copy of the Draft NPDES permit renewal for your facility. Please
review this draft carefully to ensure thorough understanding of the requirements and conditions it
contains. There are several changes from the existing permit, including the following:
• Per 15A NCAC 02B .0508, monitoring frequencies for BOD5, ammonia, TSS, fecal
coliform, temperature, DO, pH, and total residual chlorine have been revised to reflect a
Grade II facility at the 0.3 MGD flow tier [See A.(L)].
Per 15A NCAC 02B .0508, effluent monitoring for Total Nitrogen and Total Phosphorus
has been added to the permit at the 0.3 MGD flow tier [See A.(L)].
For calculation of TN concentrations, effluent monitoring for TKN and NO2+NO3 has
been added at both flow tiers [See A.(1.) and A.(2.)].
To verify discharge from the Muddy Creek WWTP is not contributing to the dissolved
copper and dissolved zinc impairments in the receiving stream, effluent monitoring for total
copper and total zinc has been added to the permit [See A.(L) and A.(2.)].
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 final wastewater method in 40 CFR136
published in the Federal Register [See Special Condition A.(6.) PFAS Monitoring
Requirements].
• Some of the wording has changed in Special Condition A.(3.), Chronic Toxicity Permit
Limit, please review each paragraph carefully.
• Special Condition A.(4.) has been modified to include the specific three years in which the
Effluent Pollutant Scan shall be performed (2025, 2026, and 2027). In addition, at the end of
the Special Condition, 2°d species Toxicity Testing Requirements for municipal permit
renewals per Federal Regulations [40 CFR 122.210)(5)] have been added.
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 E Q�� 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
NORTH CAHOLINA 919.707.9000
oepa"em or Erwin" ,eev,� aeei� /"�

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
https://bit.ly/3k5NFaL and can be viewed online or downloaded as a PDF file.
Concurrent with this notification the Division is publishing a notice in a newspaper having
circulation in the general Cabarrus 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,
fr-1-a A-*�
Saad Masood, Engineer III
NPDES Municipal Permitting Unit
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/Mark Vander Borgh
DWR/Aquatic Toxicology Branch/Cindy Moore & Molly Nicholson
DWR/Municipal Permitting Unit/Keyes McGee
WSACC/James Sims and Matthew Isenhour
E Q�� 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
NORTH CAROLINA � 919.707.9000
DWarDnem of Envlmn—WI Duel

Permit NCO081621
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
N( PDES)
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
Water and Sewer Authority of Cabarrus County
is hereby authorized to discharge wastewater from a facility located at the
Muddy Creek WWTP
14655 Hopewell Church Road
Midland
Cabarrus County
to receiving waters designated as the Rocky River in the Yadkin -Pee Dee 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............ Month xx, 2024.
This permit and authorization to discharge shall expire at midnight on ........................... October 31, 2028.
Signed this day ...................Month xx, 2024.
DRAFT
Michael J. Montebello, NPDES Permitting Branch Chief
Division of Water Resources
Page 1 of 13

Permit NCO081621
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.
Water and Sewer Authority of Cabarrus County
is hereby authorized to:
1. Continue to operate and maintain the Muddy Creek WWTP, an existing 0.3 MGD facility consisting
of the following components:
• Pump station
• Mechanical bar screen and backup manual bar screen
• Equalization basin
• Influent splitter box
• Four aeration box
• Two clarifiers
• Three tertiary filters
• Ultra -violet disinfection
• Cascade aeration
• Aerated sludge holding tanks
• Stand —by power
2. After receiving an Authorization to Construct (A to C) from the Division, construct a new facility
with Outfall 002 and after submitting an Engineer's certification, operate treatment facilities not to
exceed a permitted flow of 1.0 MGD.
3. Discharge from said treatment works at the locations specified on the attached map via Outfalls 001
and 002 into the Rocky River, classified C waters in the Yadkin -Pee Dee River Basin and 03040105
HUC.
Page 2 of 13

Permit NCO081621
PART
A.(L) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [0.3 MGD]
[ 15A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.] Grade 11
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 above
0.3 MGD (and receipt of the Engineer's Certification of completion) 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
Location'
Flow 50050
0.3 MGD
Continuous
Recording
I or E
BOD, 5 day, 20°C 3
(Apr 1 - Oct 31) C0310
10.0 mg/L
15.0 mg/L
Weekly
Composite
I and E
BOD, 5 day, 20°C 3
(Nov 1 - Mar 31) C0310
20.0 mg/L
30.0 mg/L
Weekly
Composite
I and E
Total Suspended Solids3 C0530
30.0 mg/L
45.0 mg/L
Weekly
Composite
I and E
NH3 as N (Apr 1 - Oct 31) C0610
4.0 mg/L
12.0 mg/L
Weekly
Composite
E
NH3 as N (Nov 1 - Mar 31) C0610
8.0 mg/L
24.0 mg/L
Weekly
Composite
E
Fecal Coliform 31616
(geometric mean)
200/100 mL
400/100 mL
Weekly
Grab
E
Dissolved Oxygen 00300
Daily Average > 5.0 mg/L
Weekly
Grab
E
pH 00400
Between 6.0 and 9.0 Standard Units
Weekly
Grab
E
Temperature (°C) 00010
Monitor and Report
Daily
Grab
E
Total Residual Chlorine' 50060
28 µg/L
2/Week
Grab
E
Conductivity (µmhos/cm) 00094
Monitor and Report
3/Week
Grab
E
Total Phosphorus (mg/L) C0665
Monitor and Report
Quarterly
Composite
E
TKN (mg/L) 00625
Monitor and Report
Quarterly
Composite
E
NO3-N + NO2-N (mg/L) 00630
Monitor and Report
Quarterly
Composite
E
Total Nitrogen' (mg/L) C0600
Monitor and Report
Quarterly
Calculated
E
Total Copper (µg/L) 01042
Monitor and Report
Quarterly
Composite
E
Total Zinc (µg/L) 01092
Monitor and Report
Quarterly
Composite
E
PFAS6 variable
See Footnote 6
Footnote 6
Grab
E
Chronic Toxicity 7 TGP3B
Monitor and Report
Quarterly
Composite
E
Effluent Pollutant Scan 8 NCO]
Monitor and Report
Footnote 8
Footnote 8
E
Hardness' -Total as CaCO3 (mg/L) 00900
Monitor and Report
Quarterly
Composite
E
Hardness' -Total as CaCO3 (mg/L) 00900
Monitor and Report
Quarterly
Grab
U
Dissolved Oxygen (mg/L) 00300
Monitor and Report
Variable'
Grab
U and D
Temperature °C 00010
Monitor and Report
Variable'
Grab
U and D
Conductivity (µmhos/cm) 00094
Monitor and Report
Variable'
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.(7.).
Footnotes continue on the next page.
Page 3 of 13

Permit NC0081621
Footnotes continued from A.(1.) Effluent Limitations and Monitoring Requirements:
2. Sample locations I -Influent, E-Effluent, U-Upstream = upstream at least 200 feet above the outfall, D-
Downstream = NCSR 1140. 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. Instream sampling
requirements are provisionally waived in light of the permittee's participation in the Yadkin -Pee Dee River
Basin Association. Should participation in the association cease, all instream sampling requirements are
immediately reinstated.
3. The monthly average effluent BOD5 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 Jig/I.
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. See Special Condition A.(6.).
7. Chronic Toxicity (Ceriodaphnia dubia) P/F at 1.2% with testing in January, April, July and October. See
Special Condition A.(3.).
8. The permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition
A.(4.).
9. 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.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 4 of 13

Permit NCO081621
A.(2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [1.0 MGD]
[15A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.] Grade III
Biological Water Pollution Control System [ 15A NCAC 08G .0302]
(a.) During the period beginning upon receipt of the Engineer's Certification for completion of the 1.0
MGD expansion and lasting until permit expiration, the permittee is authorized to discharge treated
municipal and industrial wastewater from Outfall 002. 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
1.0 MGD
Continuous
Recording
I or E
BOD, 5 day, 20'C 3
(Apr 1 - Oct 31) C0310
5.0 mg/L
7.5 mg/L
3/Week
Composite
I and E
BOD, 5 day, 20°C 3
(Nov 1 - Mar 31) C0310
10.0 mg/L
15.0 mg/L
3/Week
Composite
I and E
Total Suspended Solids3 C0530
30.0 mg/L
45.0 mg/L
3/Week
Composite
I and E
NH3 as N (Apr 1 - Oct 31) C0610
1.0 mg/L
3.0 mg/L
3/Week
Composite
E
NH3 as N (Nov 1 - Mar 31) C0610
2.0 mg/L
6.0 mg/L
I
3/Week
Composite
E
Fecal Coliform 31616
(geometric mean)
200/100 mL
400/100 mL
3/Week
Grab
E
Dissolved Oxygen 00300
Daily Average > 5.0 mg/L
3/Week
Grab
E
pH 00400
Between 6.0 and 9.0 Standard Units
3/Week
Grab
E
Temperature ('C) 00010
Monitor and Report
Daily
Grab
E
Total Residual Chlorine 4 50060
28 µg/L
3/Week
Grab
E
Conductivity (µmhos/cm) 00094
Monitor and Report
3/Week
Grab
E
Total Phosphorus (mg/L) C0665
Monitor and Report
Monthly
Composite
E
TKN (mg/L) 00625
Monitor and Report
Monthly
Composite
E
NO3-N + NO2-N (mg/L) 00630
Monitor and Report
Monthly
Composite
E
Total Nitrogen' (mg/L) C0600
Monitor and Report
Monthly
Calculated
E
Total Copper (µg/L) 01042
Monitor and Report
Quarterly
Composite
E
Total Zinc (µg/L) 01092
Monitor and Report
Quarterly
Composite
E
PFAS6 variable
See Footnote 6
Footnote 6
Grab
E
Chronic Toxicity 7 TGP3B
Monitor and Report
Quarterly
Composite
E
Effluent Pollutant Scans NCO]
Monitor and Report
Footnote 8
Footnote 8
E
Hardness' -Total as CaCO3 (mg/L) 00900
Monitor and Report
Quarterly
Composite
E
Hardness' -Total as CaCO3 (mg/L) 00900
Monitor and Report
Quarterly
Grab
U
Dissolved Oxygen (mg/L) 00300
Monitor and Report
Variable'
Grab
U and D
Temperature °C 00010
Monitor and Report
Variable'
Grab
U and D
Conductivity (µmhos/cm) 00094
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.(7.).
Footnotes continue on the next page.
Page 5 of 13

Permit NC0081621
Footnotes continued from A.(2.) Effluent Limitations and Monitoring Requirements:
2. Sample locations I -Influent, E-Effluent, U-Upstream = upstream at least 200 feet above the outfall, D-
Downstream = NCSR 1140. 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. Instream sampling
requirements are provisionally waived in light of the permittee's participation in the Yadkin -Pee Dee River
Basin Association. Should participation in the association cease, all instream sampling requirements are
immediately reinstated.
3. The monthly average effluent BOD5 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/1 to be in compliance with the permit. However, the
permittee shall continue to record and submit all values reported by a North Carolina certified laboratory
(including field certified), even if these values fall below 50 µg/1.
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. See Special Condition A.(6.).
7. Chronic Toxicity (Ceriodaphnia dubia) P/F at 3.9% with testing in January, April, July and October. See
Special Condition A.(3.).
8. The permittee shall perform three effluent pollutant scans during the term of this permit. See Special Condition
A.(4.).
9. 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.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 6 of 13

Permit NCO081621
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 1.2% @ 0.3 MGD and 3.9% @ 1.0
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
January, April, July, and October. 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 THP313 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 7 of 13

Permit NCO081621
A.(4.) ADDITIONAL MONITORING REQUIREMENTS FOR PERMIT RENEWAL
[G.S. 143-215.1(b)]
(a.) Effluent Pollutant Scans.
The permittee shall perform a total of
three (3)
Effluent Pollutant Scans
for all parameters listed below.
One scan must be performed in each
of the
following years: 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 (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
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
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-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-tichlorobenzene
1,1-dichloroethane
34496
Benzo(k)fluoranthene
34242
1,2-dichloroethane
32103
Bis (2-chloroethoxy) methane
34278
Page 8 of 13
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 NC0081621
(b.) Effluent Scan Reporting. Test results shall be reported electronically via eDMR by December
31st of each designated sampling year, except that, subject to prior written approval by the Director,
results can be reported on DWR Form DMR-PPA-1 or other form approved by the Director. The
permittee must at least report completion of the test in the eDMR system by entering "1" or "Y" for
parameter code NCO - Annual Pollutant Scan. If written reports are approved, the report shall be
submitted to the following address:
North Carolina Division of Water Resources
Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Or the form may be uploaded at: https://edocs.deq.nc.gov/Forms/NPDES_WW-EDMR-
Supplemental-Form
(c.) 2"-Species Toxicity Testing and Reporting.
(i.) In addition to the quarterly toxicity tests required in Condition A.(3.) (CHRONIC TOXICITY
PERMIT LIMIT (QUARTERLY)), the Permittee shall perform and report the results of four
(4) toxicity tests using the same test methods using a second species of test organism suitable
to the tests being conducted.
(ii.) The 2' 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, [e-mail].
(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 NCO081621
A.(5.) FACILITY CLOSURE REQUIREMENTS
[G.S. 143-215.1 (b)]
Once the construction of the new 1.0 MGD facility with Outfall 002 is completed and the facility submit
the Engineer's Certification of Completion, the Permittee shall submit to the Division a closure plan for
the existing facility (Outfall 001). The plan shall be submitted at least 90 days prior to the closure of the
existing facility covered by this permit. The Division may require specific measures during deactivation
of the facility to prevent adverse impacts to waters of the state. The closure plan shall be submitted to:
NCDEQ / Division of Water Resources
NPDES Permitting
1617 Mail Service Center
Raleigh, NC 27699-1617
A.(6.) PFAS MONITORING REQUIREMENT
[G.S. 143-215.1(b.)]
NCDEQ / Division of Water Resources
Mooresville Regional Office
610 East Center Avenue, Suite 301
Mooresville, NC 28115
This reporting requirement for the per- and polyfluoroalkyl substances (PFAS) parameters listed under
Table 1 of EPA Method 1633 takes effect the first full calendar quarter following six (6) months after EPA
publishes the method under 40 CFR Part 136 in the Federal Register. Monitoring will be at a quarterly
frequency.
Find the current parameters listed under Table 1 of the Method 1633 Analysis of Per- and Polyfluoroalkyl
Substances (PFAS) in Aqueous, Solid, Biosolids, and Tissue Samples by LC-MS/MS (EPA, January 2024)
at:
https://www.epa.gov/system/files/documents/2024-01 /method-1633-final-for-web-posting.pdf
A.(7.) ELECTRONIC REPORTING - DISCHARGE MONITORING REPORTS
[G.S. 143-215.1 (b)]
Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program
reports. The final NPDES Electronic Reporting Rule was adopted and became effective on December 21,
2015.
NOTE: This special condition supplements or supersedes the following sections within Part II of this
permit (Standard Conditions for NPDES Permits):
• Section B. (11.) 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.
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Permit NC0081621
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:Hdeq.nc.gov/about/divisions/water-resources/edmr.
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility
being physically located in an area where less than 10 percent of the households have broadband
access, then a temporary waiver from the NPDES electronic reporting requirements may be granted
and discharge monitoring data may be submitted on paper DMR forms (MR 1, 1.1, 2, 3) or alternative
forms approved by the Director. Duplicate signed copies shall be submitted to the following address:
NC DEQ / Division of Water Resources / Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
See "How to Request a Waiver from Electronic Reporting" section below.
Monitoring results obtained during the previous month(s) shall be summarized for each month and
reported via the eDMR system no later than the last calendar day of the month following the
completed reporting period. Regardless of the submission method, the first DMR is due on the last
day of the month following the issuance of the permit or in the case of a new facility, on the last day
of the month following the commencement of discharge.
Starting on December 21, 2025, the permittee must electronically report the following compliance
monitoring data and reports, when applicable:
Sewer Overflow/Bypass Event Reports; and
Pretreatment Program Annual Reports; and
Clean Water Act (CWA) Section 316(b) Annual Reports.
The permittee may seek an electronic reporting waiver from the Division (see "How to Request a
Waiver from Electronic Reporting" section below).
2. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9), the permittee must identify the initial recipient at the time of
each electronic submission. The permittee should use the EPA's website resources to identify the
initial recipient for the electronic submission.
Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity
(EPA or the state authorized by EPA to implement the NPDES program) that is the designated entity
for receiving electronic NPDES data [see 40 CFR 127.2(b)].
EPA plans to establish a website that will also link to the appropriate electronic reporting tool for
each type of electronic submission and for each state. Instructions on how to access and use the
appropriate electronic reporting tool will be available as well. Information on EPA's NPDES
Electronic Reporting Rule is found at: https://www.federalregister.gov/documents/2015/10/22/2015-
24954/national-pollutant-discharge-elimination-system-npdes-electronic-reporting-rule
Electronic submissions must start by the dates listed in the "Reporting Requirements" section above.
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Permit NC0081621
3. How to Request a Waiver from Electronic Reporting
The permittee may seek a temporary electronic reporting waiver from the Division. To obtain an
electronic reporting waiver, a permittee must first submit an electronic reporting waiver request to the
Division. Requests for temporary electronic reporting waivers must be submitted in writing to the
Division for written approval at least sixty (60) days prior to the date the facility would be required
under this permit to begin submitting monitoring data and reports. The duration of a temporary
waiver shall not exceed 5 years and shall thereupon expire. At such time, monitoring data and reports
shall be submitted electronically to the Division unless the permittee re -applies for and is granted a
new temporary electronic reporting waiver by the Division. Approved electronic reporting waivers
are not transferrable. Only permittees with an approved reporting waiver request may submit
monitoring data and reports on paper to the Division for the period that the approved reporting waiver
request is effective.
Information on eDMR and the application for a temporary electronic reporting waiver are found on
the following web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)1
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II,
Section B. (I 1.)(a) or by a duly authorized representative of that person as described in Part II,
Section B. (11.)(b). A person, and not a position, must be delegated signatory authority for eDMR
reporting purposes.
For eDMR submissions, the person signing and submitting the DMR must obtain an eDMR user
account and login credentials to access the eDMR system. For more information on North Carolina's
eDMR system, registering for eDMR and obtaining an eDMR user account, please visit the following
web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
Certification. Any person submitting an electronic DMR using the state's eDMR system shall make
the following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION
WILL BE ACCEPTED:
7 certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the information,
the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I
am aware that there are significant penalties for submitting false information, including the
possibility of fines and imprisonment for knowing violations. "
5. Records Retention [Supplements Section D. (6.)]
The permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions.
These records or copies shall be maintained for a period of at least 3 years from the date of the report.
This period may be extended by request of the Director at any time [40 CFR 122.411.
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Permit NCO081621
NC0081621— Muddy Creek WWTP
Latitude: 35°12'W Sub -Basin: 03.07-12
Longitude: W29 27" River Basin: Yadkin -Pee Dee
Quad Name: Stanfield, N.C. Receiving Stream: Rocky River
Stream Class: C HUC: 03040105
I Facility
Location
� - ,1 /L Cabarrus County
n r
V eA& Map not to scale
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