NC0023973_Draft Permit_20220809

DocuSign Envelope ID A98652F3-DF92-4F94-83C5-DFB3C36E73E3
.00
ROY COOPER 'I
Governor V r `
ELIZABETH S.BISER K
Secretary
t°`a
RICHARD E.ROGERS,JR. NORTH CAROLINA
Director Environmental Quality
August 9, 2022
Mr. Kenneth Waldroup,Executive Director
Cape Fear Public Utility Authority
235 Government Center Dr
Wilmington,NC 28403
Subject: Draft NPDES Permit Renewal
Permit NC0023973
M'Kean Maffitt(Southside) WWTP
New Hanover County
Grade IV Biological WPCS
SIC Code 4952
Dear Mr. Waldroup:
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:
• The system component list on the Supplement to Cover Sheet has been revised based on
communication with facility staff, including the replacement of chlorination-dechlorination
system with a UV disinfection system.
• Based on your request and NPDES guidance regarding the reduction of monitoring
frequencies in NPDES permits for exceptionally performing facilities, monitoring
requirements for BOD5,Total Suspended Solids,Ammonia-Nitrogen and Fecal Coliform will
continue reduced at twice per week for the 12.0 MGD flow tier [See A. (1.)].
• Based on the reasonable potential analysis (RPA) showing no reasonable potential to
violate state water quality standards using revised dilution factors from the 2018 JP-EFDC
dilution model, the monitoring requirements for Total Phenolic Compounds, Total Copper
(including limits)and Total Silver have been removed from the permit [see A. (1.)—A. (4.)].
• Based on the removal of Total Copper limits and monitoring, the copper compliance
schedule has been removed from the permit.
• Based on the RPA showing reasonable potential to violate state water quality standards •
with a limited dataset(n<8 samples),quarterly monitoring for Bis(2-ethylhexyl)phthalate has
been added to the permit at 16.0, 20.0 and 24.0 MGD expansion flow tiers [see A. (2.) —A.
(4.)].
North Carolina Department of Environmental Quality I Division of Water Resources
�® 512 North Salisbury Street 11611 Mail Service Center I Raleigh,North Carolina 27699-1611
NoNIFI CAHOI P.AD
DR*a rm.ram,eaa UuNM1 919.707.9000
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DocuSign Envelope ID.A98652F3-DF92-4F94-83C5-DFB3C36E73E3
• Based on Mercury TMDL evaluation showing mercury detectable values reported at levels
> 1 ng/L and since the permitted flow is greater than 2 MGD, the Mercury Minimization Plan
special condition has been reworded toward its maintenance [see A. (7.)].
• Based on the facility treating industrial wastewater, conductivity effluent monitoring has
been added to the permit.
• Based on the results of the 2018 JP-EFDC dilution model results,the Chronic Toxicity test
limits have been revised at all flow tiers[see A. (1.)—A. (5.)].
• Some of the wording has changed in Special Condition A. (5.), 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 (2023, 2024, and 2025). In addition, some of
the wording in the 2nd species Toxicity Testing requirements section has been changed.Please
read 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.
• 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) interne
application has been added to your NPDES permit [See A. (10.)].
• Parameter codes have been added to the Effluent Limitations and Monitoring Requirements
and Effluent Pollutant Scan [See A. (1.)—A. (4.)and A. (6.)].
• Regulatory citations have been added to the permit.
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 New Hanover 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(919)707-3611 or by email at [e-mail].
Sincerely,
rDocuSipned by:
9 C91952D
Gary Perlmutter, Environmental Specialist II
NPDES Municipal Permitting Unit
_.4 North Caroli of ironmental Q I of es 512 North SanalisburyDepartment Street 1 1611Env Mail Serviceuality Center I
Division Raleigh,NorthWater CaroResourclina 27699-1611
919 707 9000
D.V.MI.,O ofFrmepmo.1 OuN�

1 DocuSign Envelope ID:A98652F3-DF92-4F94-83C5-DFB3C36E73E3
Hardcopy: NPDES Files .
eCopy: US EPA Region 4
DWR/Wilmington Regional Office/Water Quality/Morella S.King
DWR/Wilmington Regional Office/Pretreatment/Helen Perez
DWR/Operator Certification Program/Maureen Kinney
DWR/Ecosystems Branch/Mark Vander Borgh
DWR/Aquatic Toxicology Branch/Zachary Thomas and Cindy Moore
DWR/Municipal Permitting Unit/Pretreatment/Keyes McGee
DWR/Basin Planning Branch/Nora Deamer
CFPUA/Beth Eckert
North Carolina Department of Environmental Quality I Division of Water Resources
D E Q
.00) 512 North Salisbury Street 11611 Mail Service Center I Raleigh,North Carolina 27699-1611
P _
919.707.9000

DocuSign Envelope ID:A98652F3-DF92-4F94-83C5-DFB3C36E73E3
Permit NC0021709
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision 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
Cape Fear Public Utility Authority
is hereby authorized to discharge wastewater from a facility located at the
M'Kean Maffitt(Southside)WWTP
3436 River Road
Wilmington,NC 28412 •
New Hanover County
to receiving waters designated as Cape Fear River in the Cape Fear River Basin in accordance with effluent
limitations,monitoring requirements,and other conditions set forth in Parts I,II,III and IV hereof.
This permit shall become effective Month 1, 2022.
This permit and authorization to discharge shall expire at midnight on November 30,2026.
Signed this day Month xx,2022.
DRAFT
for Richard E.Rogers,Jr., Director
Division of Water Resources
By Authority of the Environmental Management Commission

DocuSign Envelope ID:A98652F3-DF92-4F94-83C5-DFB3C36E73E3
P
Permit NC0023973
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility,whether for operation or discharge, are hereby revoked.As
of this permit issuance, any previously issued permit bearing this number is no longer effective. Therefore,the
exclusive authority to operate and discharge from this facility arises under the permit conditions,requirements,
terms,and provisions included herein.
The Cape Fear Public Authority is hereby authorized to:
1. Continue to operate an existing 12.0 MGD wastewater treatment system consisting of the following:
• Influent metering
• Standby manual bar screens
• Dual mechanical bar screens,each with grit removal and storage unit
• Splitter box
• Dual primary clarifiers
• Dual trickling filters(180 feet diameter)
• Short-term aeration basin
• Splitter box
• Three screw lift pumps
• Dual secondary clarifiers
• Return activated sludge pumping station
• Dual UV chambers
• Outfall structure with flow meter
• Main plant backup generator
• Lift-station generator,automatically activated(with backup generator)
• Primary and waste-activated sludge pump stations
• Two gravity-belt thickeners,two belt filter presses;four anaerobic digesters;covered storage area
• Solids land application
The facility is located at the M'Kean Maffitt (Southside) WWTP, 3436 River Road, Wilmington in New
Hanover County.
2. After receiving an Authorization to Construct from the Division, construct and operate facilities giving the
system a treatment capacity of 16.0 MGD;and
3. After receiving an Authorization to Construct from the Division, construct and operate facilities giving the
system a treatment capacity of 20.0 MGD;and
4. After receiving an Authorization to Construct from the Division, construct and operate facilities giving the
system an ultimate treatment capacity of 24.0 MGD;and
5. Discharge from said treatment facility through Outfall 001 at the location specified on the attached map into
the Cape Fear River,classified as a Class SC-PNA stream in the Cape Fear River Basin.
Page 2 of 19

DocuSign Envelope ID:A98652F3-DF92-4F94-83C5-DFB3C36E73E3
Permit NC0023973
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS(12.0 MGD)
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.] Grade IV Biological Water Pollution
Control System [15A NCAC 08G .0302]
a. During the period beginning on the effective date and lasting until expansion above 12.0 MGD(and receipt
of the Engineer's Certification of completion),the Permittee is authorized to discharge treated wastewater
from Outfall 001. Such discharges shall be limited and monitored ' by the Permittee as specified below:
EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS
Monthly Weekly Daily Measurement Sample Sample
Parameter Code Average Average Maximum Frequency Type Location 2
Flow 50050 12.0 MGD Continuous RecordingInfluent or
Effluent
CBOD,5-day,20°C 3 80082 25.0 mg/L 40.0 mg/L 2/Week Composite Influent and
Effluent
Total Suspended Solids C0530 30.0 mg/L 45.0 mg/L 2/Week Composite Influent and
(TSS)3 9 9Effluent
Ammonia—N(NH3-N)(mg/L) C0610 Monitor and Report 3/Week Composite Effluent
Enterococa 61211 35/100 mL 276/100 mL 2/Week Grab Effluent
(geometric mean)
Total Residual Chlorine(TRC)4 50060 13.0 µg/L Daily Grab Effluent
Temperature(°C) 00010 Monitor and Report Daily Grab Effluent
pH 00400 Between 6.8 and 8.5 Standard Units 3/Week Grab Effluent
Dissolved Oxygen(DO) 00300 Daily Minimum>_5 mg/L Daily Grab Effluent
(mg/L)
Conductivity(pmhos/cm) 00094 Monitor and Report Daily Grab Effluent
Total Nitrogen(mg/L)5 C0600 Monitor and Report Monthly Composite Effluent
Total Phosphorus(mg/L) C0665 Monitor and Report Monthly Composite Effluent
Chronic Toxicity 6 TGP3B Ceriodaphnia dubia Pass/Fail at 3.8%effluent Quarterly Composite Effluent
Effluent Pollutant Scan NC01 Monitor and Report Footnote 7 Footnote 7 Effluent
Dissolved Oxygen(DO) 00300 Monitor and Report Variable 9 Grab Upstream,
p(mg/L)6 Downstream
Temperature(°C)8 00010 Monitor and Report Variable 9 Grab Upstream,
Downstream
Conductivity(pmhos/cm)8 00094 Monitor and Report Variable 9 Grab Upstream,
Downstream
Footnotes on next page.
Page 3 of 19

DocuSign Envelope ID:A98652F3-DF92-4F94-83C5-DFB3C36E73E3
P
Permit NC0023973
Footnotes:
1. Submit discharge monitoring reports electronically using NC DWR's eDMR application system;see Special Condition
A.(10.).
2. Upstream is at a point equidistant between the radio tower north of the WWTP and the northern end of the dredge spoil
island immediately east of the outfall.Downstream is at a point equidistant between the mouth of Bamards Creek and
the southern end of the dredge spoil island immediately east of the outfall.
3. The monthly average effluent CBOD5 and TSS concentrations shall not exceed 15%of the respective influent value
(85%removal).
4. The facility shall monitor TRC when using chlorination for disinfection.The Division shall consider all effluent total
residual chlorine values reported below 50 µg/L to be in compliance with the permit.However,the Permittee shall
continue to record and submit all values reported by a North Carolina certified laboratory(including field-certified),
even if these values fall below 50 µg/L.
5. Total Nitrogen=TKN+NO3-N+NO2-N,where TKN is Total Kjeldahl Nitrogen,NO3-N is Nitrate Nitrogen,and NO2-
N is Nitrite Nitrogen.
6. Whole Effluent Toxicity shall be monitored using the Pass/Fail Chronic Toxicity test with Ceriodaphnia dubia at 3.8%
effluent.Samples shall be taken in March,June,September&December;see Special Condition A.(5.).
7. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit;see Special Condition A.(6.).
8. Instream monitoring for all parameters is provisionally waived considering the Permittee's participation in the Lower
Cape Fear River Program. Instream monitoring shall be immediately reinstated, and the Division shall be notified
immediately should the Permittee end its participation in the Program.
9. Stream samples shall be collected 3/week from June 1 through September 30, and collected weekly from October 1
through May 31.
b. There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 4 of 19

DocuSign Envelope ID:A98652F3-DF92-4F94-83C5-DFB3C36E73E3
Permit NC0023973
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS(16.0 MGD)
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.] Grade IV Biological Water Pollution
Control System [15A NCAC 08G .0302]
a. Beginning upon receipt of the Engineer's Certification of completion of the 16.0 MGD expansion and lasting
until expansion above 16.0 MGD (and receipt of the Engineer's Certification of completion) or permit
expiration, the Permittee is authorized to discharge treated wastewater from Outfall 001. Such discharges
shall be limited and monitored ' by the Permittee as specified below:
EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS
Monthly Weekly Daily Measurement Sample Sample
Parameter Code Average Average Maximum Frequency Type Location 2
Flow 50050 16.0 MGD Continuous RecordingInfluent or
Effluent
BOD,5-day,20°C C0310 5.0 mg/L 7.5 mg/L Daily Composite Influent and
(Apr 1 —Oct 31) Effluent
BOD,5-day,20°C C0310 10.0 mg/L 15.0 mg/L DailyComposite
Influent and
(Nov 1—Mar 31)3 g g p Effluent
Total Suspended Solids C0530 10.0 mg/L 15.0 m lL DailyComposite
Influent and
9 g p
(TSS)3Effluent
NH3-N(Apr 1-Oct 31) C0610 1.0 mg/L 3.0 mg/L 3/Week Composite Effluent
NH3—N(Nov 1 —Mar 31) C0610 2.0 mg/L 6.0 mg/L 3/Week Composite Effluent
Enterococa 61211 35/100 mL 276/100 mL Daily Grab Effluent
(geometric mean) I
Total Residual Chlorine
(TRC)a 50060 13.0 µg/L Daily Grab Effluent
Temperature(°C) 00010 Monitor and Report Daily Grab Effluent
pH 00400 Between 6.8 and 8.5 Standard Units Daily Grab Effluent
Dissolved Oxygen(DO) 00300 Daily average>_6.0 mg/L Daily Grab Effluent
Conductivity(pmhos/cm) 00094 Monitor and Report Daily Grab Effluent
Total Nitrogen(mg/L)5 C0600 Monitor and Report Monthly Composite Effluent
Total Phosphorus(mg/L) C0665 Monitor and Report Monthly Composite Effluent
Bis(2-Ethylhexyl)Phthalate CO100 Monitor and Report Quarterly Grab Effluent
(pg/L)
Chronic Toxicity 6 NC01 Ceriodaphnia dubia Pass/Fail at 4.5%effluent Quarterly Composite Effluent
Effluent Pollutant Scan 00300 Monitor and Report Footnote 7 1 Footnote 7 Effluent
Dissolved Oxygen(DO) Upstream,
(mg/L)�� 00010 Monitor and Report Variable 11 Grab Downstream
Temperature(°C)10 00094 Monitor and Report - Variable 11 Grab Upstream,
Downstream
Conductivity(pmhos/cm) 00094 Monitor and Report Variable 11 Grab Upstream,
Downstream
Footnotes on next page.
Page 5 of 19

DocuSign Envelope ID A98652F3-DF92-4F94-83C5-DFB3C36E73E3
Permit NC0023973
Footnotes:
1. Submit discharge monitoring reports electronically using NC DWR's eDMR application system;see Special Condition
A.(10.).
2. Upstream is at a point equidistant between the radio tower north of the WWTP and the northern end of the dredge spoil
island immediately east of the outfall. Downstream is at a point equidistant between the mouth of Barnards Creek and
the southern end of the dredge spoil island immediately east of the outfall.
3. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15%of the respective influent value(85%
removal).
4. The facility shall monitor TRC when using chlorination for disinfection.The Division shall consider all effluent total
residual chlorine values reported below 50 µg/L to be in compliance with the permit.However,the Permittee shall
continue to record and submit all values reported by a North Carolina certified laboratory(including field-certified),
even if these values fall below 50 µg/L.
5. Total Nitrogen=TKN+NO3-N+NO2-N,where TKN is Total Kjeldahl Nitrogen,NO3-N is Nitrate Nitrogen,and NO2-
N is Nitrite Nitrogen.
6. Whole Effluent Toxicity shall be monitored using the Pass/Fail Chronic Toxicity test with Ceriodaphnia dubia at 4.5%
effluent.Samples shall be taken in March,June, September and December;see Special Condition A.(5.).
7. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit;see Special Condition A.(6.).
8. Instream monitoring for all parameters is provisionally waived considering the Permittee's participation in the Lower
Cape Fear River Program. Instream monitoring shall be immediately reinstated, and the Division shall be notified
immediately should the Permittee end its participation in the Program.
9. Stream samples shall be collected 3/week from June 1 through September 30, and collected weekly from October 1
through May 31.
b. There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 6 of 19

DocuSign Envelope ID:A98652F3-DF92-4F94-83C5-DFB3C36E73E3
Permit NC0023 973
A. (3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS(20.0 MGD)
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.] Grade IV Biological Water Pollution
Control System [15A NCAC 08G .0302]
a. Beginning upon receipt of the Engineer's Certification of completion of the 20.0 MGD expansion and lasting
until expansion above 20.0 MGD (and receipt of the Engineer's Certification of completion) or permit
expiration, the Permittee is authorized to discharge treated wastewater from Outfall 001. Such discharges
shall be limited and monitored I by the Permittee as specified below:
EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS
Monthly Weekly Daily Measurement Sample Sample
Parameter Code Average Average Maximum Frequency Type Location 2
Flow 50050 20.0 MGD Continuous RecordingInfluent or
Effluent
BOD,5-day,20°C Influent and
(Apr —Oct 31)3 C0310 5.0 mg/L 7.5 mg/L Daily Composite Effluent
BOD,5-day,20°C Influent and
(Nov 1—Mar 31)3 C0310 10.0 mg/L 15.0 mg/L Daily Composite Effluent
Total Suspended Solids C0530 10.0 mg/L 15.0 mg/L DailyComposite
Influent and
g g p(TSS)3Effluent
NH3—N(Apr 1—Oct 31) C0610 1.0 mg/L 3.0 mg/L 3/Week Composite Effluent
NH3—N(Nov 1 —Mar 31) C0610 2.0 mg/L 6.0 mg/L 3/Week Composite Effluent
Enterococci
(geomettriric mean) 61211 35/100 mL 276/100 mL Daily Grab Effluent
(geom
Total
(TRC)Residual Chlorine 50060 13.0 ng/L Daily Grab Effluent
Temperature(°C) 00010 Monitor and Report Daily Grab Effluent
pH 00400 Between 6.8 and 8.5 Standard Units Daily Grab Effluent
Dissolved Oxygen(DO) 00300 Daily average z 6.0 mg/L Daily Grab Effluent
Conductivity(pmhos/cm)8 00094 Monitor and Report Daily Grab Effluent
Total Nitrogen(mg/L)5 C0600 Monitor and Report Monthly Composite Effluent
Total Phosphorus(mg/L) C0665 Monitor and Report Monthly Composite Effluent
Bis(2-Ethylhexyl)Phthalate C0100 Monitor and Report Quarterly Grab Effluent
(pg/L)
Chronic Toxicity 6 00300 Ceriodaphnia dubia Pass/Fail at 5.1%effluent Quarterly Composite Effluent
Effluent Pollutant Scan 00010 Monitor and Report Footnote 7 Footnote 7 Effluent
Dissolved Oxygen(DO) 00094 Monitor and Report Variable 9 Grab Upstream,
p(mg/L)6 Downstream
Temperature(°C)6 50050 Monitor and Report Variable 9 Grab Upstream,
Downstream
Conductivity(pmhos/cm)6 00094 Monitor and Report Variable 9 Grab Upstream,
Downstream
Footnotes on next page.
Page 7 of 19

DocuSign Envelope ID:A98652F3-DF92-4F94-83C5-DFB3C36E73E3
Permit NC0023973
Footnotes:
1. Submit discharge monitoring reports electronically using NC DWR's eDMR application system;see Special Condition
A.(10.).
2. Upstream is at a point equidistant between the radio tower north of the WWTP and the northern end of the dredge spoil
island immediately east of the outfall. Downstream is at a point equidistant between the mouth of Barnards Creek and
the southern end of the dredge spoil island immediately east of the outfall.
3. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15%of the respective influent value(85%
removal).
4. The facility shall monitor TRC when using chlorination for disinfection.The Division shall consider all effluent total
residual chlorine values reported below 50 µg/L to be in compliance with the permit.However,the Permittee shall
continue to record and submit all values reported by a North Carolina certified laboratory(including field-certified),
even if these values fall below 50 µg/L.
5. Total Nitrogen=TKN+NO3-N+NO2-N,where TKN is Total Kjeldahl Nitrogen,NO3-N is Nitrate Nitrogen,and NO2-
N is Nitrite Nitrogen.
6. Whole Effluent Toxicity will be monitored using the Pass/Fail Chronic Toxicity test with Ceriodaphnia dubia at 5.1%
effluent.Samples shall be taken in March,June,September and December;see Special Condition A.(5.).
7. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit;see Special Condition A.(6.).
8. Instream monitoring for all parameters is provisionally waived considering the Permittee's participation in the Lower
Cape Fear River Program. Instream monitoring shall be immediately reinstated, and the Division shall be notified
immediately should the Permittee end its participation in the Program.
9. Stream samples shall be collected 3/week from June 1 through September 30, and collected weekly from October 1
through May 31.
b. There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 8 of 19

DocuSign Envelope ID:A98652F3-DF92-4F94-83C5-DFB3C36E73E3
Permit NC0023973
A. (4.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS(24.0 MGD)
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.] Grade IV Biological Water Pollution
Control System [1SA NCAC 08G .0302]
a. Beginning upon receipt of the Engineer's Certification of completion of the 24.0 MGD expansion and lasting
until or permit expiration, the Permittee is authorized to discharge treated wastewater from Outfall 001.
Such discharges shall be limited and monitored ' by the Permittee as specified below:
EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS
Monthly Weekly Daily Measurement Sample Sample
Parameter Code Average Average Maximum Frequency Type Location 2
Flow 50050 24.0 MGD Continuous RecordingInfluent or
Effluent
BOD,5-day,20°C(Summer: C0310 5.0 mg/L 7.5 mg/L Daily Composite Influent and
April 1 through October 31) Effluent
BOD,5-day,20°C(Winter: Influent and
November 1 through March 31) C0310 10.0 mg/L 15.0 mg/L Daily Composite Effluent
3
Total Suspended Solids(TSS)3 C0530 10.0 mg/L 15.0 mg/L Daily Composite Influent and
Effluent
NH3—N(Summer:April 1 C0610 1.0 mg/L 3.0 mg/L 3/Week Composite Effluent
through October 31)
NH3—N(Winter: November 1 C0610 2.0 mg/L 6.0 mg/L 3/Week Composite Effluent
through March 31)
Enterococci(geometric mean) 61211 35/100 mL 276/100 mL Daily Grab Effluent
Total Residual Chlorine(TRC)4 50060 13.0 µg/L Daily Grab Effluent
Temperature(°C) 00010 Monitor and Report Daily Grab Effluent
pH 00400 Between 6.8 and 8.5 Standard Units Daily Grab Effluent
Dissolved Oxygen(DO) 00300 Daily average>_6.0 mg/L Daily Grab Effluent
Conductivity(pmhos/cm) 00094 Monitor and Report Daily Grab Effluent
Total Nitrogen(mg/L)5 C0600 Monitor and Report Monthly Composite Effluent
Total Phosphorus(mg/L) C0665 Monitor and Report Monthly Composite Effluent
Bis(2-Ethylhexyl)Phthalate(pg/L) CO100 Monitor and Report Quarterly Grab Effluent
Chronic Toxicity 6 00300 Ceriodaphnia dubia Pass/Fail at 5.7% Quarterly Composite Effluent
effluent
Effluent Pollutant Scan 00010 Monitor and Report Footnote 7 Footnote 7 Effluent
Dissolved Oxygen(DO) 00094 Monitor and Report Variable 9 Grab Upstream,
(mg/L) Downstream
Temperature(°C)8 50050 Monitor and Report Variable 9 Grab Upstream,
Downstream
Conductivity(pmhos/cm)8 00094 Monitor and Report Variable9 Grab Upstream,
Downstream
Footnotes on next page.
Page 9 of 19

DocuSign Envelope ID.A98652F3-DF92-4F94-83C5-DFB3C36E73E3
Permit NC0023973
Footnotes:
1. Submit discharge monitoring reports electronically using NC DWR's eDMR application system;see Special Condition
A.(10.).
2. Upstream is at a point equidistant between the radio tower north of the WWTP and the northern end of the dredge spoil
island immediately east of the outfall. Downstream is at a point equidistant between the mouth of Barnards Creek and
the southern end of the dredge spoil island immediately east of the outfall.
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 µg/L.
5. Total Nitrogen=TKN+NO3-N+NO2-N,where TKN is Total Kjeldahl Nitrogen,NO3-N is Nitrate Nitrogen,and NO2-
N is Nitrite Nitrogen.
6. Whole Effluent Toxicity shall be monitored using the Pass/Fail Chronic Toxicity test with Ceriodaphnia dubia at 5.7%
effluent.Samples shall be taken in March,June,September and December;see Special Condition A.(5.).
7. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit;see Special Condition A.(6.).
8. Instream monitoring for all parameters is provisionally waived considering the Permittee's participation in the Lower
Cape Fear River Program. Instream monitoring shall be immediately reinstated, and the Division shall be notified
immediately should the Permittee end its participation in the Program.
9. Stream samples shall be collected 3/week from June 1 through September 30, and collected weekly from October 1
through May 31.
b. There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 10 of 19

DocuSign Envelope ID A98652F3-DF92-4F94-83C5-DFB3C36E73E3
Permit NC0023973
A.(5.) CHRONIC TOXICITY PERMIT LIMIT(Quarterly) [15A NCAC 02B .0200 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 3.8% at 12 MGD; 4.5% at 16 MGD; 5.1% at 20 MGD;
and 5.7%at 24 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 March,June,September and December.
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 on the Effluent Discharge
Monitoring Form(MR-1)for the months in which tests were performed,using the parameter code TGP3B for the
pass/fail results and THP3B for the Chronic Value.Additionally,DWR Form AT-3 (original)is to be sent to the
following address:
Attention: 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,ATForms.ATB(a,ncdenr.gov.
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.
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DocuSign Envelope ID.A98652F3-DF92-4F94-83C5-DFB3C36E73E3
Permit NC0023973
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.
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DocuSign Envelope ID A98652F3-DF92-4F94-83C5-DFB3C36E73E3
Permit NC0023973
A.(6.) EFFLUENT POLLUTANT SCAN AND SECOND SPECIES TOXICITY TESTING
(Municipal POTWs)[G.S. 143-215.1(b)]
The Permittee shall perform a total of three (3) Effluent Pollutant Scans for all parameters listed below. At 12.0
MGD,one scan must be performed in each of the following years:2023,2024,and 2025.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. Samples should be collected with one quarterly
toxicity test each year, and must 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,NH3-N) Trans-1,2-dichloroethylene Bis(2-chloroethyl)ether
Chlorine(total residual,TRC) 1,1-dichloroethylene Bis(2-chloroisopropyl)ether
Dissolved oxygen 1,2-dichloropropane Bis(2-ethylhexyl)phthalate
Nitrate/Nitrite 1,3-dichloropropylene 4-bromophenyl phenyl ether
Kjeldahl nitrogen Ethylbenzene Butyl benzyl phthalate
Oil and grease Methyl bromide 2-chloronaphthalene
Phosphorus Methyl chloride 4-chlorophenyl phenyl ether
Total dissolved solids Methylene chloride Chrysene
Hardness 1,1,2,2-tetrachloroethane Di-n-butyl phthalate
Antimony Tetrachloroethylene Di-n-octyl phthalate
Arsenic Toluene Dibenzo(a,h)anthracene
Beryllium 1,1,1-trichloroethane 1,2-dichlorobenzene
Cadmium 1,1,2-trichloroethane 1,3-dichlorobenzene
Chromium Trichloroethylene 1,4-dichlorobenzene
Copper Vinyl chloride 3,3-dichlorobenzidine
Lead Acid-extractable compounds: Diethyl phthalate
Mercury(EPA Method 1631E) P-chloro-m-cresol Dimethyl phthalate
Nickel 2-chlorophenol 2,4-dinitrotoluene
Selenium 2,4-dichlorophenol 2,6-dinitrotoluene
Silver 2,4-dimethylphenol 1,2-diphenylhydrazine
Thallium 4,6-dinitro-o-cresol Fluoranthene
Zinc 2,4-dinitrophenol Fluorene
Cyanide 2-nitrophenol Hexachlorobenzene
Total phenolic compounds 4-nitrophenol Hexachiorobutadiene
Volatile organic compounds: Pentachlorophenol Hexachlorocyclo-pentadiene
Acrolein Phenol Hexachloroethane
Acrylonitrile 2,4,6-trichlorophenol Indeno(1,2,3-cd)pyrene
Benzene Base-neutral compounds: Isophorone
Bromoform Acenaphthene Naphthalene
Carbon tetrachloride Acenaphthylene Nitrobenzene
Chlorobenzene Anthracene N-nitrosodi-n-propylamine
Chlorodibromomethane Benzidine N-nitrosodimethylamine
Chloroethane Benzo(a)anthracene N-nitrosodiphenylamine
2-chloroethylvinyl ether Benzo(a)pyrene Phenanthrene
Chloroform 3,4 benzofluoranthene Pyrene
Dichlorobromomethane Benzo(ghi)perylene 1,2,4-trichlorobenzene
1,1-dichloroethane Benzo(k)fluoranthene
1,2-dichloroethane Bis(2-chloroethoxy)methane
Reporting. Test results shall be reported electronically using the Division's eDMR system or on DWR Form
DMR-PPA-1 (or on a form approved by the Director)by December 31st of each designated sampling year. The
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DocuSign Envelope ID:A98652F3-DF92-4F94-83C5-DFB3C36E73E3
Permit NC0023973
Permittee must at least report completion of the test in the eDMR system by entering"1"of"Y"for parameter
code NC01 -Annual Pollutant Scan. If utilizing the DWR Form submit to the following address:
North Carolina Division of Water Resources
NPDES 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.
Additional Toxicity Testing Requirements for Municipal Permit Renewal. Please note that Municipal
facilities that are subject to the Effluent Pollutant Scan requirements listed above are also subject to additional
toxicity testing requirements specified in Federal Regulation 40 CFR 122.21(j)(5).The US EPA requires four(4)
toxicity tests for a test organism other than the test species currently required in this permit. The second species
tests should be conducted either quarterly for a 12-month period prior to submittal of the permit renewal
application, or four tests performed at least annually in the four and one-half year (4 '/2) period prior to the
application. Samples should be collected with one quarterly toxicity test each year,and must represent seasonal
variation [i.e., do not sample in the same quarter every year]. These tests shall be performed for acute or
chronic toxicity,whichever is specified in this permit.The multiple species toxicity test results shall be filed with
the Aquatic Toxicology Branch at 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].
Contact the Division's Aquatic Toxicology Branch at 919-743-8401 for guidance on conducting the additional
toxicity tests and reporting requirements.Results should also be summarized in Part E(Toxicity Testing Data)of
EPA Municipal Application Form 2A, when submitting the permit renewal application to the NPDES Permitting
Unit.
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DocuSign Envelope ID:A98652F3-DF92-4F94-83C5-DFB3C36E73E3
Permit NC0023973
A. (7.) MERCURY MINIMIZATION PLAN(MMP)[G.S. 143-215.1 (b)]
The Permittee shall continue implementing the mercury minimization plan during this permit term. 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. (8.) HISTORICAL PERMIT LIMITS
The Division recognizes that prior to issuance of this permit, the M'Kean Maffitt (Southside) WWTP was
permitted to discharge with secondary limits of 25.0 mg/L CBOD5, 30.0 mg/L TSS,and no limit for NH3-N. At
the permitted flow of 12.0 MGD, these limits translate approximately to mass loads of 457 tons per year(tpy)
BOD5,548 tpy TSS,and 365 tpy NH3-N(assuming 20 mg/L). The mass loads described in this paragraph will be
one factor the Division considers when developing future wasteload allocations resulting from the TMDL process
or when considering future expansion requests for the M'Kean Maffitt WWTP.
A.(9.) ANTI-BACKSLIDING
The BOD5 and NH3-N limits in this permit may be replaced with less stringent limits without violating state and
Federal anti-backsliding provisions if:
1. Material and substantial alterations or additions to the permitted facility occurred after permit issuance
that justifies less stringent limits;
2. Events occurred beyond the Permittee's control for which there is no reasonably available remedy;
3. Permittee has properly installed and operated required treatment equipment that cannot achieve permit
limits; or
4. New information(other than revised regulations,guidance,or test methods)is available that justifies less
stringent limits;
and provided that the Division deems such modification appropriate and consistent with applicable laws and
regulations.
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DocuSign Envelope ID:A98652F3-DF92-4F94-83C5-DFB3C36E73E3
Permit NC0023973
A. (10.) ELECTRONIC REPORTING OF 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.) Reporting
• Section D. (6.) Records Retention
• Section E.(5.) 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 monthly DMRs electronically using the internet. The eDMR system may be accessed at:
https://deq.nc.gov/about/divisions/water-resources/edmr.
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility being
physically located in an area where less than 10 percent of the households have broadband access, then a
temporary waiver from the NPDES electronic reporting requirements may be granted and discharge
monitoring data may be submitted on paper DMR forms (MR 1, 1.1, 2, 3)or alternative forms approved by
the Director.Duplicate signed copies shall be submitted to the following address:
NC 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.
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;
• 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).
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DocuSign Envelope ID.A98652F3-DF92-4F94-83C5-DFB3C36E73E3
Permit NC0023973
2. Electronic Submissions
In accordance with 40 CFR 122.41(lx9),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-pol l utant-discharge-
el im ination-system-npdes-electronic-reporting-rule
Electronic submissions must start by the dates listed in the"Reporting Requirements"section above.
3. How to Request a Waiver from Electronic Reporting
The Permittee may seek a temporary electronic reporting waiver from the Division. To obtain an electronic
reporting waiver,a permittee must first submit an electronic reporting waiver request to the Division.Requests
for temporary electronic reporting waivers must be submitted in writing to the Division for written approval
at least sixty(60)days prior to the date the facility would be required under this permit to begin submitting
monitoring data and reports. The duration of a temporary waiver shall not exceed five (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. Sienatory 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.(11.Xa)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/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
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DocuSign Envelope ID:A98652F3-DF92-4F94-83C5-DFB3C36E73E3
Pennit NC0023973
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 ISunalements Section D.(6.)j
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 three(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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DocuSign Envelope ID:A98652F3-DF92-4F94-83C5-DFB3C36E73E3
Permit NC0023973
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