NC0065102_Draft Permit_20230911

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
Mr. Jamie Revels, Utilities Director
Town of Cary
PO Box 8005
Cary, North Carolina 27512-8005
Dear Mr. Revels:
NORTH CAROLINA
Env&wwwntal Quality
September 12, 2023
Subject: Draft NPDES Permit Renewal
Permit NCO065102
South Cary WRF
Wake 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:
For clarity, the instream monitoring requirements have been relocated from Section
A.(1.) to Special Condition A.(3.) Instream Monitoring Requirements.
Based on review of ambient monitoring data, instream monitoring requirements have
been revised to remove the second downstream monitoring location and parameters initially
monitored at this location have been shifted to the remaining downstream monitoring point
[See Special Condition A.(3.)].
To track potential influence on the receiving stream which has observed high levels of
ambient conductivity, effluent conductivity monitoring has been added [See A.(1.) and
A.(2.)].
Based on Mercury TMDL evaluation showing mercury values reported at levels > 1 ng/L
and since the permitted flow is greater than 2 MGD, Special Condition A.(11.) Mercury
Minimization Plan has been added to the permit.
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
method published in the Federal Register [See Special Condition A.(9.) PFAS Monitoring
Requirements].
Language has been added to Footnote I to account for influent and effluent abbreviations
[See A.(1.) and A.(2.)].
For consistency with permits subject to the Neuse River Nutrient Management Strategy,
some of the wording has changed in Special Condition A.(8.) Total Nitrogen Allocations
please review each paragraph carefully.
As the condition merely reiterates the Division's practice, Special Condition A.(10.)
Clarification of Compliance When a Permit Limit is Set At or Below ML (Minimum Levels)
has been removed from the permit.
• Some of the wording has changed in Special Condition A.(4.), Chronic Toxicity Permit
Limit, please review each paragraph carefully.
DNorth Carolina Department of Environmental Quality I Division of Water Resources E Q�� 512 North Salisbury Street 11611 Mail Service Center I Raleigh, North Carolina 27699-1611
919.707.9000

• Special Condition A.(5.) 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.
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.
The map has been updated to reflect the revised instream monitoring locations.
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 Wake 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,
�Doeutttpned by:
70000A FCA'*M
Nick Coco, PE
NPDES Municipal Permitting Unit
Hardcopy: NPDES Files
Ecopy: US EPA Region 4
DWR/Raleigh Regional Office/Water Quality/Vanessa Manuel
DWR/Operator Certification Program/Maureen Kinney
DWR/Ecosystems Branch/Mark Vander Borgh
DWR/Aquatic Toxicology Branch/Cindy Moore & Molly Nicholson
LNBA/Executive Director/Haywood Phthisic
Town of Cary/Plant Manager/Jarrod Buchanan
EQ�
North Carolina Department ofEnvironmental Quality I Division ofWater Resources
512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
919.707.9000

Permit NCO065102
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
Town of Cary
is hereby authorized to discharge wastewater from a facility located at the
South Cary Water Reclamation Facility (WRIT)
4900 West Lake Road
Apex
Wake County
to receiving waters designated as Middle Creek in the Neuse River Basin
in accordance with the effluent limitations, monitoring requirements, and other applicable conditions set
forth in Parts 1, II, III, and IV hereof.
This permit shall become effective............ Month xx, 20xx.
This permit and authorization to discharge shall expire at midnight on ................................April 30, 2028.
Signed this day ................... Month xx, 20xx.
DRAFT
for Richard E. Rogers, Jr., Director
Division of Water Resources
By Authority of the Environmental Management
Commission
Page 1 of 15

Permit NCO065102
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.
Town of Cary
is hereby authorized to:
1. Continue to operate and maintain the South Cary WRF, an existing 12.8 MGD facility consisting of
the following components:
• Two automatic bar screens and one manual bar screen
• Influent flow meter
• Two aerated grit chambers -,.,.
• Three BNR reactor basins (5-stage) with anoxic, and anaerobic zones
• Four 100-foot diameter secondary clarifi
• Seven deep bed tertiary filters
• Ultraviolet disinfection
• Effluent flow meter 4
• Two gravity belt thickeners
• Biosolids aerated holding tanks
• Two liquid solids loading and receiving stations
• Two dewatering centrifuges
• One biosolids rotary drum dryer
• Two pelletized biosolids storage silos
2. After receiving an Authorization to Construct from the Division, construct and operate improvements
to increase the average design flow of the wastewater treatment facility to 16.0 MGD; and
3. Operate a conjunctive reclaimed water utilization program for bulk distribution and distributed flow
in accordance with Non -Discharge Permit WQ0018489, and;
4. Discharge from said treatment works at the location specified on the attached map via Outfall 001
into Middle Creek, classified C; NSW waters in the Neuse River Basin and 03020201 HUC.
Page 2 of 15

Permit NCO065102
PART
A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [12.8 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 16.0
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
Location'
Flow 50050
12.8 MGD
Continuous
Recording
I or E
Total Monthly Flow (MG) 82220
Monitor and Report
Monthly
Calculated
E
BOD, 5 day, 200C s
(Apr 1 -Oct 31) C0310
5.0 mg/L
7.5 mg/L
2/week 4
Composite
I and E
BOD, 5 day, 200C 3 C0310
(Nov 1 - Mar 31)
10.0 mg/L
15.0 mg/I,
2/week 4
Composite
I and E
Total Suspended Solids' C0530
30.0 mg/L
45.0 mg/L
2/week 4
Composite
I and E
NH3 as N (Apr I - Oct 31) C0610
1.0 mg/L
3.0 mg/L
2/week 4
Composite
E
NHs as N (Nov 1 - Mar 31) C0610
2.0 mg/L
6.0 mg/L
2/week 4
Composite
E
Fecal Coliform 31616
(geometric mean)
200/100 mL
400/100 ml,
2/week4
Grab
E
Dissolved Oxygen 00300
Daily Average >_ 5.0 mg/L
Daily
Grab
E
pH 00400
Between 6.0 and 9.0 Standard ['nits
Daily
Grab
E
Temperature (°C) 00010
Monitor and Report
Daily
Grab
E
Total Residual Chlorines 50060
17 µg/L
Daily
Grab
F
Conductivity (µmhos/cm) 00094
Monitor and Report
Daily
Grab
I
Total Phosphorus (mg/L) C0665
2.0 mg/L (Quarterly Average)6
Weekly
Composite
I
TKN (mg/L) 00625
Monitor and Report
Weekly
Composite
f
NO3-N + NO2-N (mg/L) 00630
Monitor and Report
Weekly
Composite
I
Total Nitrogen 7 (mg/L) C0600
Monitor and Report
Weekly
Calculated
I:
TN Load e.v QM600
QY600
Monitor and Report (lb/month)
180,210 lb/yr
Monthly
Annually
Calculated
I
HAS variable
Footnote 10
Footnote 10
Grab
I:
Chronic Toxicity TGP3B
Monitor and Report
Quarterly
Composite
I
Effluent Pollutant Scan 12 NC01
Monitor and Report
Footnote 12
Footnote 12
1:
Hardness13 -Total as CaCO3 (mg/L) 00900
Monitor and Report
Quarterly
Composite
1'.
Footnotes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. See Special Condition A.(12.).
2. Sample locations I -Influent, E-Effluent.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent value (85% removal).
4. Twice per week sampling must occur on any two non-consecutive days during the calendar week.
Footnotes continue on the next page.
Page 3 of 15

Permit NC0065102
Footnotes continued from A.(1.) Effluent Limitations and Monitoring Requirements:
5. The facility shall monitor TRC only if 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 µgll.
6. The quarterly average for total phosphorus shall be the average of composite samples collected during each
calendar quarter (January - March, April - June, July - September, October - December).
7. For a given wastewater sample, TN = TKN + NO3-N + NOrN, where TN is Total Nitrogen, TKN is Total
Kjeldahl Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively.
8. TN Load is the mass load of IN discharged by the permittee in a period of time. See Special Condition A.(6.).
9. Compliance with these limits shall be determined in accordance with Special Condition A.(7.), Annual Limits
for Total Nitrogen.
10. See Special Condition A.(8.).
11. Chronic Toxicity (Cerioc*hnia dubia) P/F at 90%with testing in February, May, August, and November. See
Special Condition A.(4.).
12. The permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition
A.(5.).
13. Effluent hardness shall be performed in conjunction with testing for hardness dent metals (cadmium,
copper, lead, nickel, silver, and zinc).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 4 of 15

Permit NCO065102
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 upon expansion to 16.0 MGD and lasting until permit expiration, the
permittee is authorized to discharge treated municipal and industrial wastewater from Outfall 001.
Such discharges shall be limited and monitored' by the permittee as specified below:
PARAMETER
Parameter Code
EFFLUENT LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location=
Flow 50050
16.0 MGD
I
Continuous
Recording
I or E
Total Monthly Flow (MG) 82220
Monitor and Report
Monthly
Calculated
E
BOD, 5 day, 20°C 3
(Apr 1 -Oct 31) C0310
5.0 mg/L
7.5 mg/L
4
Daily
Composite
I and E
BOD, 5 day, 20°C 3 C0310
(Nov 1 - Mar 31)
10.0 mg/L
15.0 mg/L
Daily 4
Composite
I and E
Total Suspended Solids3 C0530
30.0 mg/L
45.0 mg/L
Daily
Composite
I and E
NH3 as N (Apr 1 - Oct 31) C0610
1.0 mg/L
3.0 mg/L
Daily
Composite
E
NH3 as N (Nov 1 - Mar 31) C0610
2.0 mg/L
6.0 mg/L
Daily 4
Composite
I'
Fecal Coliform 31616
(geometric mean)
200/100 mL
400/100 mL
Daily 4
Grab
E
Dissolved Oxygen 00300
Daily Average 2:5.0 mg/L
Daily
Grab
E
pH 00400
Between 6.0 and 9.0 Standard Units
Daily
Grab
E
Temperature (°C) 00010
Monitor and Report
Daily
Grab
E
Total Residual Chlorine S 50060
1 1 17 µg/L
Daily
Grab
E
Conductivity (µmhos/cm) 00094
Monitor and Report
Daily
Grab
E
Total Phosphorus (mg/L) C0665
2.0 mg/L (Quarterly Average)6
Weekly
Composite
E
TKN (mg/L) 00625
Monitor and Report
Weekly
Composite
E
NO3-N + NO2-N (mg/L) 00630
Monitor and Report
Weekly
Composite
F
Total Nitrogen 7 (mg/L) C0600
Monitor and Report
Weekly
Calculated
I-
TN Load 1,9 QM600
QY600
Monitor and Report (lb/month)
180,210 lb/yr
Monthly
Annually
Calculated
E
PFAS variable
Footnote 10
Footnote 10
Grab
E
Chronic Toxicity 1 i TGP3B
Monitor and Report
Quarterly
Composite
E
Effluent Pollutant Scan'= NCO]
Monitor and Report
Footnote 12
Footnote 12
E
Hardness13 -Total as CaCO3 (mg/L) 00900
Monitor and Report
Quarterly
Composite
E
Footnotes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. See Special Condition A.(12.).
2. Sample locations I -Influent, E-Effluent.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent value (85% removal).
4. Once the 16.0 MGD limits page has been placed into effect and after six (6) consecutive months of daily
sampling, the Petmittee may request a reduction in the monitoring frequency to twice per week sampling for
any of the four parameters (BOD5, TSS, NH3-N and Fecal colifonn) for which no effluent permit limit
violations have occurred. Twice per week sampling must occur on any two non-consecutive days during the
calendar week.
Footnotes continue on the next page.
Page 5 of 15

Permit NCO065102
Footnotes continued from A.(2.) Effluent Limitations and Monitoring Requirements:
5. The facility shall monitor TRC only if using chlorination for disinfection. The Division shall consider all
effluent total residual chlorine values reported below 50 µg/I 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/I.
6. The quarterly average for total phosphorus shall be the average of composite samples collected during each
calendar quarter (January - March, April - June, July - September, October - December).
7. For a given wastewater sample, TN = TKN + NO3-N + NO2-N, where TN is Total Nitrogen, TKN is Total
Kjeldahl Nitrogen, and NO3-N and NOrN are Nitrate and Nitrite Nitrogen, respectively.
8. TN Load is the mass load of TN discharged by the permittee in a period of time. See Special Condition A.(6.).
9. Compliance with these limits shall be determined in accordance withal Condition A.(7.), Annual Limits
for Total Nitrogen.
10. See Special Condition A.(8.).
11. Chronic Toxicity (Ceriodaphnia dubia) P/F at 90% with testing in February, May, August, and November. See
Special Condition A.(4.).
12. The permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition
A.(5.).
13. Effluent hardness shall be performed in conjunction with testing for hardness dependent metals (cadmium,
copper, lead, nickel, silver, and zinc).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
A.(3.) INSTREAM MONITORING REQUIREMENTS
[15A NCAC 02B.0500 et seq.] oh'
Beginning on the effective date of this permit and lasting until lasting until permit expiration, the
Permittee shall perform instream sampling upstream and downstream of Outfall 001 as specified below:
PARAMETER
Parameter Code
MONITORING REQUIREMENTS
Measurement
Frequency
Sample Type
Sample Location'
Temperature (`C) 00010
Variable'
Grab
U, D
Dissolved Oxygen ) 00300
Variable'
Grab
U, D
pH (s.u.) 00094
Variable'
Grab
D
NH3 as N (mg/L) C0610
Monthly'
Grab
D
TKN (mg/L) 00625
Monthly'
Grab
D
NO3-N + NQZ-N (mg/L) 00630
Monthly'
Grab
D
Total Nitrogen (mg/L) C0600
Monthly'
Calculated
D
Total Phosphorus (mg/L) C0665
Monthly'
Grab
D
Hardness -Total as CaCO3 (mg/L) 2 00900
Quarterly
Grab
U
Footnotes:
1. Sample locations U -Upstream = 50 ft. above the outfall; D -Downstream = at US 401. 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 for are provisionally waived in light
of the permittee's participation in the Lower Neuse River Basin Association (LNBA). Should participation in
the association cease, all instream sampling requirements are immediately reinstated.
2. The permittee shall sample instream hardness upstream of the facility's discharge. The sample shall be
representative of the hardness in the stream.
Page 6 of 15

Permit NCO065102
A.(4.) 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 90%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in
the "North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," (Revised December 2010, or
subsequent versions) or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"
(Revised December 2010, or subsequent versions). The tests will be performed during the months of
February, May, August, and November. These months signify the first month of each three-month
toxicity testing quarter assigned to the facility. Effluent sampling for this testing must be obtained during
representative effluent discharge and shall be performed at the NPDES permitted final effluent discharge
below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV
below the permit limit, then multiple -concentration testing shall be performed at a minimum, in
each of the two following months as described in "North Carolina Phase II Chronic Whole Effluent
Toxicity Test Procedure" (Revised -December 2010, or subsequent versions).
All toxicity testing results required as part of this permit condition will be entered electronically using the
Division's eDMR system for the months in which tests were performed, using the parameter code
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 7 of 15

Permit NCO065102
A.(5.) 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.(4.) (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
Chlorine (total residual, TRC)
50060
1,1-dichloroethylene
Dissolved oxygen
00300
1,2-dichloropropane
Nitrate / Nitrite
00630
1,3-dichloropropylene
Kjeldahl nitrogen
00625
Ethylbenzene
Oil and grease
00556
Methyl bromide
Phosphorus
C0665
Methyl chloride
Total dissolved solids
70295
Methylene chloride
Hardness
00900
1,1,2,2-tetrachloroethane
Antimony
01097
Tetrachloroethylene
Arsenic
01002
Toluene
Beryllium
01012
1, 1, 1 -trichloroethane
Cadmium
01027
1,1,2-trichloroethane
Chromium
C0034
Trichloroethylene
Copper
01042
Vinyl chloride
Lead
01051
Acid -extractable compounds:
Mercury (Method 1631E)
COMER
P-chloro-m-cresol
Nickel
01067
2-chlorophenol
Selenium
01147
2,4-dichlorophenol
Silver
01077
2,4-dimethylphenol
Thallium
01059
4,6-dinitro-o-cresol
Zinc
01092
2,4-dinitrophenol
Cyanide
00720
2-nitrophenol
Total phenolic compounds
32730
4-nitrophenol
Volatile organic compounds:
Pentachlorophenol
Acrolein
34210
Phenol
Acrylonitrile
34215
2,4,6-trichlorophenol
Benzene
34030
Base -neutral conrnoundc:
Bromoform
32104
Acenaphthene
Carbon tetrachloride
32102
Acenaphthylene
Chlorobenzene
34301
Anthracene
Chlorodibromomethane
34306
Benzidine
Chloroethane
85811
Benzo(a)anthracene
2-chloroethyl vinyl ether
34576
Benzo(a)pyrene
Chloroform
32106
3,4 benzolluoranthene
Dichlorobromomethane
32101
Benzo(ghi)perylene
1, 1 -dichloroethane
34496
Benzo(k)1luoranthene
1,2-dichloroethane
32103
Bis (2-chloroethoxy) methane
Page 8 of 15
34546
Bis (2-chloroethyl) ether
34273
34501
Bis (2-chloroisopropyl) ether
34283
C0541
Bis (2-ethylhexyl) phthalate
C0100
77163
4-bromophenyl phenyl ether
34636
34371
Butyl benzyl phthalate
34292
34413
2-chloronaphthalene
34581
344184-chlorophenyl
phenyl ether
34641
34423
Chrysene
34320
81549
Di-n-butyl phthalate
39110
34475
Di-n-octyl phthalate
34596
34010
Dibenzo(a,h)anthracene
34556
34506
1,24chlorobenzene
34536
34511
1,34chlorobenzene
34566
$9180
1,4-dichlorobenzene
34571
39175
3,3-dichlorobenzidine
34631
Diethyl phthalate
34336
34452
Dimethyl phthalate
34341
34586
2,4-dinitrotoluene
34611
34601
2,6-dinitrotoluene
C0626
34606
1,2-diphenylhydrazine
34346
34657
Fluoranthene
C0376
34616
Fluorene
34381
34591
Hexachlorobenzene
C0700
34646
Hexachlorobutadiene
C0702
39032
Hexachlorocyclo-pentadiene
34386
34694
Hexachloroethane
34396
34621
Indeno(1,2,3-cd)pyrene
34403
lsophorone
34408
34205
Naphthalene
34696
34200
Nitrobenzene
34447
CO220
N-nitrosodi-n-propylamine
34428
39120
N-nitrosodimethylamine
34438
C0526
N-nitrosodiphenylamine
34433
34247
Phenanthrene
34461
34230
Pyrene
34469
34521
1,2,4-trichlorobenzene
C0551
34242
34278

Permit NCO065102
(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 44
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-Foam
(c.) 2°d-Species Toxicity Testing and Reporting.
(i.) In addition to the quarterly toxicity tests required in Condition A.(4.) (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 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 (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.
Page 9 of 15

Permit NCO065102
A.(6.) CALCULATION OF TOTAL NITROGEN LOADS
[G.S. 143-215.1(b)]
(a.) The Permittee shall calculate monthly and annual TN Loads as follows:
(i.) Monthly TN Load (lb/mo) = TN x TMF x 8.34
where:
TN = the average Total Nitrogen concentration (mg/L) of the composite
samples collected during the month
TMF = the Total Monthly Flow of wastewater discharged during the month
(MG/mo)
8.34 = conversion factor, from (mg/L x MG) to pounds
(ii.) Annual TN Load (lb/yr) = Sum of the 12 Monthly TN Loads for the calendar year
(b.) The Permittee shall report monthly Total Nitrogen results (mg/L and Ib/mo) in the discharge
monitoring report for that month and shall report each year's annual results (lb/yr) in the December
report for that year.
t
A.(7.) ANNUAL LEWITS FOR TOTAL NITROGEN
[G.S. 143-215.1(b)]
(a.) Total Nitrogen (TN) allocations and TN Load limits for NPDES dischargers in the Neuse River
basin apply on a calendar year basis.
(b.) For any given calendar year, the permittee shall be in compliance with the annual TN Load limit in
this Permit if-
(i.) the permittee's annual TN discharge is less than or equal to its TN Load limit, or
(ii.) the permittee is a co-permittee member of a compliance association.
(c.) If the permittee is not a co-permittee member of a compliance association and the permittee's
cumulative annual TN discharge exceeds the effective TN Load limit in this permit at any point
during the calendar year, the permittee is in violation of its TN Load limit, and each day of a
continuing violation shall constitute a separate violation.
(d.) The TN Load limit in this Permit (if any) may be modified as the result of allowable changes in the
permittee's TN allocation.
(i.) Allowable changes include those resulting from purchase of TN allocation from the Wetlands
Restoration Fund; purchase, sale, trade, or lease of allocation between the permittee and other
dischargers; regionalization; and other transactions approved by the Division.
(ii.) The permittee may request a modification of the TN Load limit in this Permit to reflect
allowable changes in its TN allocation. Upon receipt of timely and proper application, the
Division will modify the permit as appropriate and in accordance with state and federal
program requirements.
(iii.) Changes in TN limits become effective on January I of the year following permit
modification. The Division must receive application no later than August 31 for changes
proposed for the following calendar year.
(iv.) Application shall be sent to:
NCDWR / NPDES Wastewater Program
Attn: Neuse River Basin Coordinator
1617 Mail Service Center
Raleigh, NC 27699-1617
(e.) If the permittee is a member and co-permittee of an approved compliance association, its TN
discharge during that year is governed by that association's group NPDES permit and the TN limits
therein.
Page 10 of 15

Permit NCO065102
(i.) The permittee shall be considered a co-permittee Member for any given calendar year in
which it is identified as such in Appendix A of the association's group NPDES permit.
(ii.) Association roster(s) and members' TN allocations will be updated annually and in
accordance with state and federal program requirements.
(iii.) If the permittee intends to join or leave a compliance association, the Division must be
notified of the proposed action in accordance with the procedures defined in the association's
NPDES permit.
(A) Upon receipt of timely and proper notification, the Division will modify the permit as
appropriate and in accordance with state and federal program requirements.
(B) Membership changes in a compliance association become effective on January 1 of the
year following modification of the association's permit.
(f.) The TN monitoring and reporting requirements in this Permit remain in effect until expiration of
this Permit and are not affected by the permittee's membership in a compliance association.
A.(8.) TOTAL NITROGEN ALLOCATIONS
[G.S. 143-215.1(b)]
(a.) The following table lists the Total Nitrogen (TN) allocations and offset credits assigned to, acquired
by, or transferred to or from the permittee in accordance with the Neuse River nutrient strategy
(15A NCAC 02B .0700) and the status of each as of permit issuance. These allocations are not
enforceable limits, nor do they supersede any TN limit(s) established elsewhere in this permit or in
the NPDES nermit of a comnliance association of which the vermittee is a co-vermittee Member.
ALLOCATION/ CREDITS
ALLOCATION/
SOURCE
DATE
AMOUNT'
STATUS
Estuary
Discharge
CREDITS TYPE
(lb/yr)
(lb/yr)
Base Allocation
Assigned by Rule z
12/7/97; 4/1/03
90,105
180,211
Active
TOTAL
90,105
190,211
Active
Footnotes:
1. Transport Factor = 50%.
2. Rule 15A NCAC 02B .0713 (formerly 02B .0234)
(b.) Any addition, deletion, or modification of the listed allocations and credits (other than
typographical errors) or any change in status of any of the listed allocations and credits (if the
facility has no TN Load limit, substitute "any change of allocation or credits to active status") 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.
A.(9.) PFAS MONITORING REQUIREMENT
[G.S. 143-215.1(b.)]
This reporting requirement for the per- and polyfluoroalkyl substances (PFAS) parameters listed under
Table 1 of the Final Method 1633 takes effect the first full calendar quarter following six (6) months after
EPA publishes a 40 CFR part 136 Final PFAS Method for wastewater in the Federal Register. Monitoring
will be at a quarterly frequency.
Find the current parameters listed under Table 1 of the 4 h Draft Method 1633 Analysis of Per- and
Polyfluoroalkyl Substances (PFAS) in Aqueous, Solid, Biosolids, and Tissue Samples by LC-MS/MS at:
hgps•//www epa gov/system/files/documents/2022-
12/3rd%20Draft%20Method%201633%20December%202022%2012-20-22 508.vdf
Page 11 of 15

Permit NCO065102
A.(10.) CLARIFICATION OF MONITORING REQUIREMENTS
[15A NCAC 213.0505 (Cx4)]
In accordance with 15A NCAC 2B .0505 (c)(4), stream sampling may be discontinued when flow
conditions or extreme weather conditions could result in injury or death of the person(s) collecting the
samples. In such cases, on each day that sampling is discontinued, written justification for the
discontinuance shall be specified in the monitoring report for the month in which the event occurred.
This provision also applies to influent and effluent sampling.
A.(11.) MERCURY MINIMIZATION PLAN (MMP)
[N.C.G.S. 143-215.1 (B)]
The Permittee shall develop and implement a mercury minimization plan during this permit term. The
MMP shall be developed within 180 days of the permit effective date, and shall be available for
inspection on -site. A sample MMP was developed through a stakeholder review process and has been
placed on the Division website for guidance (https://deq.nc.gov/document/nc-model-mercury-
minimization-plan-dwr-npdes-swp-20130801). 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 Mercury Minimization Plan 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.(12.) 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 ISupersedes Section D. (2.) and Section E. (5.) (a)I
The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic
Discharge Monitoring Report (eDMR) internet application.
Monitoring results obtained during the previous month(s) shall be summarized for each month and
submitted monthly electronically using eDMR. The eDMR system allows permitted facilities to enter
monitoring data and submit DMRs electronically using the internet. The eDMR system may be
accessed at: https://deq.nc.gov/about/divisions/water-resources/edmr.
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility
being physically located in an area where less than 10 percent of the households have broadband
access, then a temporary waiver from the NPDES electronic reporting requirements may be granted
Page 12 of 15

Permit NC0065102
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.
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
Page 13 of 15

Permit NC0065102
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 transferable. 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 I .xa) or by a duly authorized representative of that person as described in Part II,
Section B. (1 l.)(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/divi sions/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 offines and imprisonment for knowing violations. "
5. Records Retention [Supplements Section D. (6.)]
The permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions.
These records or copies shall be maintained for a period of at least 3 years from the date of the report.
This period may be extended by request of the Director at any time [40 CFR 122.41 ].
Page 14 of 15

Permit NCO065102
NCO065102 —South Cary WRF Facility
Latitude, 35 38'48" Sub -Basin. 03-04-03 Location
Loreitudc 794528" 8-Ditit HVC, 030202M
Quad it Ape., N.C.
Stream Class- C NSW
Rece-re Stream. Middle Cre4w o,.}h
Fermitted Flow' 128 MGD and 16AMGD NIY �� LLI I Map not to scale
Page 15 of 15

RECEIVED
I . b
2022-2023
Annual Performance Report
Laserfiche
NCDEQ/DWR/NPDEf!§'� Town of Maxton's Wastewater System
I. General Information
Facility/System Name: Town of Maxton Wastewater Plant jot j (t
Responsible Entity: Town of Maxton CEt\TRA1
DWR SECTIO;N!
Person in Charge/Charge: Dennis Freeman
Applicable Permits: NC0027120 / WQ0002527
Description of Collection System or Treatment Process:
The Town of Maxton's wastewater collection system consists of i l pump stations
located throughout the system. Thcrc arc 27 miles of gravity sewer lines and 3
miles of force main lines. Our Wastewater Plant consists of two plants. The
fast plant was built in the early 1%0's with one aeration ditch, one clarifier, one
chlorine contact chamber and two return sludge pumps with a total capacity of
300,000 gallons per day. The second plant was built in 1980 with one aeration
ditch, one clarifier, one chlorine contact chamber and two sludge return pumps with
total capacity of 300,000 gallons per day. Both plants combined can treat 600,000
gallons per day, but during normal conditions we only use the new part of the
facility. Our average flow during dry periods is 250,000 gallons per day. The
facility has one 16,000 gallon aerobic digester and three sand drying beds.
II. Performance
Text Summary of System Performance from July 1, 2022 through June 30, 2023
The list by month provides any violations of permit conditions or other
environmental regulations. Monthly list includes discussion of any environmental
impacts and corrective measures taken to address violations.
Month NPDES VIOLATIONS
July 2022
No Violations
August 2022
No Violations
September 2022
No Violations
October 2022
No Violations
November 2022
No Violations

December 2022
No Violations
January 2023
No Violations
February 2023
No Violations
March 2023
No Violations
April 2023
No Violations
May 2023
No Violations
June 2023
No Violations
M. Notification
The Annual Performance Report is available at the Town Hall and customers
were notified of this through our customer confidence report which was mailed
May 2, 2022.
IV. Certification
I certify under penalty of law that this is complete and accurate to the best of my
knowledge. I f nticr certify that this report has been made available to the users or
customers of the named system and that those users have been notified of its
availability,
Responsible Person: Dennis Freeman
Title: Water & Wastewater Superintendent
Entity: Town of Maxton (Town Of)
Phone: [phone]
R77-I- -
Dennis Freeman Water/Wastewater Director