NC0023973_Draft Permit_20220110

DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196
ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
S. DANIEL SMITH
Director
Mr. Kenneth Waldroup
Executive Director
Cape Fear Public Utility Authority
235 Government Center Drive
Wilmington, North Carolina 28403
Dear Mr. Waldroup:
NORTH CAROLINA
Environmental Quality
January 10, 2022
Subject: Draft NPDES Permit Modification
Permit NC0023973
M'Kean Maffit (Southside) WWTP
New Hanover County
Grade IV Biological WPCS
SIC Code 4952
Enclosed with this letter is a copy of the Draft NPDES permit modification for your facility. Please
review this draft carefully to ensure thorough understanding of the requirements and conditions it
contains.
Please note that the receiving stream is listed as an impaired waterbody on the North Carolina 2020
303(d) Impaired Waters List for copper and low dissolved oxygen. Addressing impaired waters is
a high priority with the Division, and instream data will continue to be evaluated. If there is
noncompliance with permitted effluent limits and stream impairment can be attributed to your
facility, then mitigative measures may be required
The draft permit contains the following significant changes from your current permit:
• Per the Permittee's request, the final date of the compliance schedule for Total Copper has
been extended to November 29, 2022, with relevant footnotes in the affected effluent sheets
modified to reflect this extended date. See Footnote 6 in Sections A. (1.) through A. (4.) and
Special Condition A. (9.).
• Some of the wording has changed in Special Condition A. (5.), Chronic Toxicity Permit
Limit, please review each paragraph carefully.
• Federal regulations require electronic submittal of all discharge monitoring reports
(DMRs) and program reports. The requirement to continue reporting discharge monitoring data
electronically using the NC DWR's Electronic Discharge Monitoring Report (eDMR) internet
application has been added to your NPDES permit [See Special Condition A. (12.)].
• 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
NORTH CAROLINA
Department of Environmental Duality
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11617 Mail Service Center I Raleigh, North Carolina 27699-1617
919.707.9000

DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196
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 [phone] or by email at [e-mail].
Sincerely,
DocuSigned by:
L
Gary Perlmutter, Environmental Specialist II
NPDES Municipal Permitting Unit
Hardcopy: NPDES Files
eCopy: US EPA Region 4
DWR / Wilmington Regional Office / Water Quality / Morella S. King
DWR / Operator Certification Program / Maureen Kinney
DWR / Ecosystems Branch/Mark Vander Borgh
DWR / Aquatic Toxicology Branch / Zach Thomas and Cindy Moore
DWR / Municipal Permitting Unit / Keyes McGee
DWR / Wilmington Regional Office/Water Quality / Pretreatment/Tom Harrington
and Helen Perez
CFPUA / Beth Eckert
Page 2 of 2

DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196
Permit NC0023973
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 xx, 2022.
This permit and authorization to discharge shall expire at midnight on November 30, 2022.
Signed this day Month xx, 2022.
DRAFT
S. Daniel Smith, Director
Division of Water Resources
By Authority of the Environmental Management Commission

DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196
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 screen
• 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
• Chlorine gas disinfection facilities
• Liquid dechlorination facilities
• Flash mixer for chlorine gas
• Dual chlorine contact 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; alkaline stabilization,
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 21

DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196
Permit NC0023973
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (12.0 MGD)
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
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) 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
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample Location 2
Flow
12.0 MGD
Continuous
Recording
Influent or Effluent
CBOD, 5-day, 20°C 3
25.0 mg/L
40.0 mg/L
2/Week
Composite
Influent and Effluent
Total Suspended Solids (TSS) 3
30.0 mg/L
45.0 mg/L
2/Week
Composite
Influent and Effluent
Ammonia—N (NH3-N) (mg/L)
Monitor and Report
3/Week
Composite
Effluent
Enterococci (geometric mean)
35/100 mL
276/100 mL
2/Week
Grab
Effluent
Total Residual Chlorine (TRC) 4
13.0 µg/L
Daily
Grab
Effluent
Temperature (°C)
Monitor and Report
Daily
Grab
Effluent
pH
Between 6.8 and 8.5 Standard Units
3/Week
Grab
Effluent
Dissolved Oxygen (DO) (mg/L)
Monitor and Report
Daily
Grab
Effluent
Total Nitrogen (mg/L) 5
Monitor and Report
Monthly
Composite
Effluent
Total Phosphorus (mg/L)
Monitor and Report
Monthly
Composite
Effluent
Total Copper 6
3.7 pg/L
5.8 pg/L
Monthly
Composite
Effluent
Total Silver (µg/L) 7
Monitor and Report
Quarterly
Composite
Effluent
Chronic Toxicity 8
Ceriodaphnia dubia Pass/Fail at 3% effluent
Quarterly
Composite
Effluent
Effluent Pollutant Scan
Monitor and Report
Footnote 9
Footnote 9
Effluent
Dissolved Oxygen (DO) (mg/L)1°
Variable 11
Grab
Upstream,
Downstream
Temperature (°C)10
Variable 11
Grab
Upstream,
Downstream
All footnotes are listed on the following page.
Page 3 of 21

DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196
Permit NC0023973
Footnotes:
1. Submit discharge monitoring reports electronically using NC DWR's eDMR application system; see Section
A. (12.).
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 CBOD5 and TSS concentrations shall not exceed 15% of the respective influent
value (85% removal).
4. The Division shall consider all effluent TRC 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. The facility shall follow the compliance schedule detailed in Section A. (9.). The Permittee shall achieve
compliance with these limitations by November 29, 2022.
7. Total Silver shall be monitored using "clean" sampling techniques and reported to the lower reporting level
of the procedure.
8. Whole Effluent Toxicity shall be monitored using the Pass/Fail Chronic Toxicity test with Ceriodaphnia dubia
at 3% effluent. Samples shall be taken in March, June, September & December; see Section A. (5.).
9. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit; see Section A. (6.).
10. The Permittee has deferred receiving -stream sampling to the Lower Cape Fear River Program by
memorandum of agreement (MOA). Should this MOA terminate for any reason, the Permittee shall
immediately inform the Division in writing and immediately resume instream monitoring in accordance with
this permit.
11. 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 21

DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196
Permit NC0023973
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (16.0 MGD)
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
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
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample Location 2
Flow
16.0 MGD
Continuous
Recording
Influent or Effluent
BOD, 5-day, 20°C (Summer:
April 1 through October 31) 3
5.0 mg/L
g
7.5 mg/L
g
DailyComposite
p
Influent and Effluent
BOD, 5-day, 20°C (Winter: 3
November 1 through March 31)
10.0 mg/L
15.0 mg/L
Daily
Composite
Influent and Effluent
Total Suspended Solids (TSS) 3
10.0 mg/L
15.0 mg/L
Daily
Composite
Influent and Effluent
NH3—N (Summer: April 1 through
October 31)
1.0 mg/L
3.0 mg/L
3/Week
Composite
Effluent
NH3—N (Winter: November 1
through March 31)
2.0 mg/L
6.0 mg/L
3/Week
Composite
Effluent
Enterococci (geometric mean)
35/100 mL
276/100 mL
Daily
Grab
Effluent
Total Residual Chlorine (TRC) 4
13.0 µg/L
Daily
Grab
Effluent
Temperature (°C)
Monitor and Report
Daily
Grab
Effluent
pH
Between 6.8 and 8.5 Standard Units
Daily
Grab
Effluent
Dissolved Oxygen (DO)
Daily average >_ 6.0 mg/L
Daily
Grab
Effluent
Total Nitrogen (mg/L) 5
Monitor and Report
Monthly
Composite
Effluent
Total Phosphorus (mg/L)
Monitor and Report
Monthly
Composite
Effluent
Total Phenolic Compounds
(pg/L)
Monitor and Report
Quarterly
Composite
Effluent
Total Copper (pg/L) 6
1.8 pg/L
2.9 pg/L
Monthly
Composite
Effluent
Total Silver (µg/L) 7
Monitor and Report
Quarterly
Composite
Effluent
Chronic Toxicity 8
Ceriodaphnia dubia Pass/Fail at 4% effluent
Quarterly
Composite
Effluent
Effluent Pollutant Scan
Monitor and Report
Footnote 9
Footnote 9
Effluent
Dissolved Oxygen (DO) (mg/L) 10
Variable 11
Grab
Upstream,
Downstream
Temperature (°C) 10
Variable 11
Grab
Upstream,
Downstream
All footnotes are listed on the following page.
Page 5 of 21

DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196
Permit NC0023973
Footnotes:
1. Submit discharge monitoring reports electronically using NC DWR's eDMR application system; see Section
A. (12.).
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. Limit and monitor only if the facility adds chlorine or chlorine derivatives to wastewater that is eventually
discharged. The Division shall consider all effluent TRC values reported below 50 µg/L to be in compliance
with the permit. 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. The facility shall follow the compliance schedule detailed in Section A. (9.). The Permittee shall achieve
compliance with these limitations by November 29, 2022.
7. Total Silver shall be monitored using "clean" sampling techniques and reported to the lower reporting level
of the procedure.
8. Whole Effluent Toxicity shall be monitored using the Pass/Fail Chronic Toxicity test with Ceriodaphnia dubia
at 4% effluent. Samples shall be taken in March, June, September and December; see Section A. (5.).
9. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit; see Section A. (6.).
10. The Permittee has deferred receiving -stream sampling to the Lower Cape Fear River Program by
memorandum of agreement (MOA). Should this MOA terminate for any reason, the Permittee shall
immediately inform the Division in writing and immediately resume instream monitoring in accordance with
this permit.
11. 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 21

DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196
Permit NC0023973
A. (3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (20.0 MGD)
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
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' by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample Location 2
Flow
20.0 MGD
Continuous
Recording
Influent or Effluent
BOD, 5-day, 20°C (Summer:
April 1 through October 31) 3
5.0 mg/L
g
7.5 mg/L
g
DailyComposite
p
Influent and Effluent
BOD, 5-day, 20°C (Winter: 3
November 1 through March 31)
10.0 mg/L
15.0 mg/L
Daily
Composite
Influent and Effluent
Total Suspended Solids (TSS) 3
10.0 mg/L
15.0 mg/L
Daily
Composite
Influent and Effluent
NH3—N (Summer: April 1 through
October 31)
1.0 mg/L
3.0 mg/L
3/Week
Composite
Effluent
NH3—N (Winter: November 1
through March 31)
2.0 mg/L
6.0 mg/L
3/Week
Composite
Effluent
Enterococci (geometric mean)
35/100 mL
276/100 mL
Daily
Grab
Effluent
Total Residual Chlorine (TRC) 4
13.0 µg/L
Daily
Grab
Effluent
Temperature (°C)
Monitor and Report
Daily
Grab
Effluent
pH
Between 6.8 and 8.5 Standard Units
Daily
Grab
Effluent
Dissolved Oxygen (DO)
Daily average >_ 6.0 mg/L
Daily
Grab
Effluent
Total Nitrogen (mg/L) 5
Monitor and Report
Monthly
Composite
Effluent
Total Phosphorus (mg/L)
Monitor and Report
Monthly
Composite
Effluent
Total Phenolic Compounds
(pg/L)
Monitor and Report
Quarterly
Composite
Effluent
Total Copper (pg/L) 6
1.8 pg/L
2.9 pg/L
Monthly
Composite
Effluent
Total Silver (µg/L) 7
Monitor and Report
Quarterly
Composite
Effluent
Chronic Toxicity 8
Ceriodaphnia dubia Pass/Fail at 5% effluent
Quarterly
Composite
Effluent
Effluent Pollutant Scan
Monitor and Report
Footnote 9
Footnote 9
Effluent
Dissolved Oxygen (DO) (mg/L) 10
Variable 1,
Grab
Upstream,
Downstream
Temperature (°C)10
Variable 1,
Grab
Upstream,
Downstream
All footnotes are listed on the following page.
Page 7 of 21

DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196
Permit NC0023973
Footnotes:
1. Submit discharge monitoring reports electronically using NC DWR's eDMR application system; see Section
A. (12.).
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. Limit and monitor only if the facility adds chlorine or chlorine derivatives to wastewater that is eventually
discharged. The Division shall consider all effluent TRC 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. The facility shall follow the compliance schedule detailed in Section A. (9.). The Permittee shall achieve
compliance with these limitations by November 29, 2022.
7. Total Silver shall be monitored using "clean" sampling techniques and reported to the lower reporting level
of the procedure.
8. Whole Effluent Toxicity will be monitored using the Pass/Fail Chronic Toxicity test with Ceriodaphnia dubia
at 5% effluent. Samples shall be taken in March, June, September and December; see Section A. (5.).
9. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit; see Section A. (6.).
10. The Permittee has deferred receiving -stream sampling to the Lower Cape Fear River Program by
memorandum of agreement (MOA). Should this MOA terminate for any reason, the Permittee shall
immediately inform the Division in writing and immediately resume instream monitoring in accordance with
this permit.
11. 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 21

DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196
Permit NC0023973
A. (4.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (24.0 MGD)
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
a. Beginning upon receipt of the Engineer's Certification of completion of the 24.0 MGD expansion and lasting
until permit expiration, the Permittee is authorized to discharge treated wastewater from Outfall 001. Such
discharges shall be limited and monitoredi by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample Location 2
Flow
24.0 MGD
Continuous
Recording
Influent or Effluent
BOD, 5-day, 20°C (Summer:
April 1 through October 31) 3
5.0 mg/L
g
7.5 mg/L
g
DailyComposite
p
Influent and Effluent
BOD, 5-day, 20°C (Winter: 3
November 1 through March 31)
10.0 mg/L
15.0 mg/L
Daily
Composite
Influent and Effluent
Total Suspended Solids (TSS) 3
10.0 mg/L
15.0 mg/L
Daily
Composite
Influent and Effluent
NH3—N (Summer: April 1 through
October 31)
1.0 mg/L
3.0 mg/L
3/Week
Composite
Effluent
NH3—N (Winter: November 1
through March 31)
2.0 mg/L
6.0 mg/L
3/Week
Composite
Effluent
Enterococci (geometric mean)
35/100 mL
276/100 mL
Daily
Grab
Effluent
Total Residual Chlorine (TRC) 4
13.0 lag/
Daily
Grab
Effluent
Temperature (°C)
Monitor and Report
Daily
Grab
Effluent
pH
Between 6.8 and 8.5 Standard Units
Daily
Grab
Effluent
Dissolved Oxygen (DO)
Daily average >_ 6.0 mg/L
Daily
Grab
Effluent
Total Nitrogen (mg/L) 5
Monitor and Report
Monthly
Composite
Effluent
Total Phosphorus (mg/L)
Monitor and Report
Monthly
Composite
Effluent
Total Phenolic Compounds
(pg/L)
Monitor and Report
Quarterly
Composite
Effluent
Total Copper (pg/L) 6
1.8 pg/L
2.9 pg/L
Monthly
Composite
Effluent
Total Silver (µg/L) 7
Monitor and Report
Quarterly
Composite
Effluent
Chronic Toxicity 8
Ceriodaphnia dubia Pass/Fail at 6% effluent
Quarterly
Composite
Effluent
Effluent Pollutant Scan
Monitor and Report
Footnote 9
Footnote 9
Effluent
Dissolved Oxygen (DO) (mg/L)1°
Variable„
Grab
Upstream,
Downstream
Temperature (°C)10
Variable„
Grab
Upstream,
Downstream
All footnotes are listed on the following page.
Page 9 of 21

DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196
Permit NC0023973
Footnotes:
1. Submit discharge monitoring reports electronically using NC DWR's eDMR application system; see Section
A. (12.).
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. Limit and monitor only if the facility adds chlorine or chlorine derivatives to wastewater that is eventually
discharged. The Division shall consider all effluent TRC 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. The facility shall follow the compliance schedule detailed in Section A. (9.). The Permittee shall achieve
compliance with these limitations by November 29, 2022.
7. Total Silver shall be monitored using "clean" sampling techniques and reported to the lower reporting level
of the procedure.
8. Whole Effluent Toxicity shall be monitored using the Pass/Fail Chronic Toxicity test with Ceriodaphnia dubia
at 6% effluent. Samples shall be taken in March, June, September and December; see Section A. (5.).
9. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit; see Section A. (6.).
10. The Permittee has deferred receiving -stream sampling to the Lower Cape Fear River Program by
memorandum of agreement (MOA). Should this MOA terminate for any reason, the Permittee shall
immediately inform the Division in writing and immediately resume instream monitoring in accordance with
this permit.
11. 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.
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DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196
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 3.0% at 12 MGD; 4.0% at 16 MGD; 5.0% at 20 MGD;
and 6.0% 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, [e-mail].
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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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: 82350931-7E08-43F3-B31A-0250B4908196
Permit NC0023973
A. (6.) EFFLUENT POLLUTANT SCAN (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. One scan
must be performed in each of the following years: 2019, 2020, and 2021. 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)
Chlorine (total residual, TRC)
Dissolved oxygen
Nitrate/Nitrite
Kjeldahl nitrogen
Oil and grease
Phosphorus
Total dissolved solids
Hardness
Antimony
Arsenic
Beryllium
Cadmium
Chromium
Copper
Lead
Mercury (EPA Method 1631E)
Nickel
Selenium
Silver
Thallium
Zinc
Cyanide
Total phenolic compounds
Volatile organic compounds:
Acrolein
Acrylonitrile
Benzene
Bromoform
Carbon tetrachloride
Chlorobenzene
Chlorodibromomethane
Chloroethane
2-chloroethylvinyl ether
Chloroform
Dichlorobromomethane
1,1-dichloroethane
1,2-dichloroethane
Trans-1,2-dichloroethylene
1,1-dichloroethylene
1,2-dichloropropane
1,3-dichloropropylene
Ethylbenzene
Methyl bromide
Methyl chloride
Methylene chloride
1,1,2,2-tetrachloroethane
Tetrachloroethylene
Toluene
1,1,1-trichloroethane
1,1,2-trichloroethane
Trichloroethylene
Vinyl chloride
Acid -extractable compounds:
P-chloro-m-cresol
2-chlorophenol
2,4-dichlorophenol
2,4-dimethylphenol
4,6-dinitro-o-cresol
2,4-dinitrophenol
2-nitrophenol
4-nitrophenol
Pentachlorophenol
Phenol
2,4,6-trichlorophenol
Base -neutral compounds:
Acenaphthene
Acenaphthylene
Anthracene
Benzidine
Benzo(a)anthracene
Benzo(a)pyrene
3,4 benzofluoranthene
Benzo(ghi)perylene
Benzo(k)fluoranthene
Bis (2-chloroethoxy) methane
Bis (2-chloroethyl) ether
Bis (2-chloroisopropyl) ether
Bis (2-ethylhexyl) phthalate
4-bromophenyl phenyl ether
Butyl benzyl phthalate
2-chloronaphthalene
4-chlorophenyl phenyl ether
Chrysene
Di-n-butyl phthalate
Di-n-octyl phthalate
Dibenzo(a,h)anthracene
1,2-dichlorobenzene
1,3-dichlorobenzene
1,4-dichlorobenzene
3,3-dichlorobenzidine
Diethyl phthalate
Dimethyl phthalate
2,4-dinitrotoluene
2,6-dinitrotoluene
1,2-diphenylhydrazine
Fluoranthene
Fluorene
Hexachlorobenzene
Hexachlorobutadiene
Hexachlorocyclo-pentadiene
Hexachloroethane
Indeno(1,2,3-cd)pyrene
Isophorone
Naphthalene
Nitrobenzene
N-nitrosodi-n-propylamine
N-nitrosodimethylamine
N-nitrosodiphenylamine
Phenanthrene
Pyrene
1,2,4-trichlorobenzene
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DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196
Permit NC0023973
Reporting. Test results shall be reported on DWR Form -A MR-PPA1 (or in a form approved by the Director) by
December 31' of each designated sampling year. The report shall be submitted to the following address: NC DEQ
/ DWR / Central Files, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617.
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 multiple 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 (41/2) year period prior to the
application. 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
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: 82350931-7E08-43F3-B31A-0250B4908196
Permit NC0023973
A. (7.) MODELING REQUIREMENT [G.S. 143-215.1 (b)]
1. Dilution Study for 12 MGD:
a) Should the Permittee choose to perform a Dilution Study for Outfall 001 to determine effluent dilution in
the Cape Fear River prior to expansion above 12 MGD, then the Permittee shall submit a Dilution Study
Plan to the Division for review and approval. The Plan shall include a proposed modeling approach and
justification for the use of the selected model (CORMIX or equivalent), a proposed sampling protocol,
and a timeline for completion of the study.
A final model report shall be submitted to the Division within 30 days of completion of the study. The
report shall include a summary of all data collected, model assumptions, model setup, model input and
model results. The report shall be submitted to the following address:
NC Division of Water Resources
NPDES Complex Permitting Unit
1617 Mail Service Center
Raleigh, NC 2699-1617
b) The dilution factor determined by the CORMIX model (or equivalent) shall be used by the Permittee for
the chronic effluent test concentration once the model is reviewed and approved by the Division.
2. Dilution Study for expanded flows:
a) The CORMIX (or equivalent) model used to determine dilution for Outfall 001 at 12 MGD shall be
updated to evaluate dilution for the proposed expanded flows (16 MGD, 20 MGD, and 24 MGD).
However, if a model was not developed for 12 MGD, then the Permittee shall submit a Dilution Study
Plan for 16 MGD to the Division for review and approval prior to expansion. Guidelines detailed in
Subsection A. (7.)(1.) above, shall be followed for the 16 MGD dilution study and model.
The Permittee shall submit a revised model providing additional information regarding end -of -pipe
dilution at the same time as the Authorization to Construct (AtC) application is submitted. The model
shall address dilution at the approved increased flow rate into the Cape Fear River at M'Kean Maffit
WWTP's discharge point for the proposed discharge configuration. The model report shall be submitted
to the following address:
NC Division of Water Resources
NPDES Complex Permitting Unit
1617 Mail Service Center
Raleigh, NC 2699-1617
b) The dilution factor determined by the CORMIX model (or equivalent) shall be used by the permittee for
the chronic effluent test concentration once the model is reviewed and approved by the Division.
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DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196
Permit NC0023973
A. (8.) MERCURY MINIMIZATION PLAN (MMP) [G.S. 143-215.1 (b)]
The Permittee shall develop and implement a Mercury Minimization Plan (MMP) during this permit term. The
MMP shall be developed by September 1, 2018, 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
(http://deq.nc.gov/about/divisions/water-resources/water-resources-permits/wastewater-branch/npdes-
wastewater-permits, under Model Mercury Minimization Plan). The MMP should place emphasis on
identification of mercury contributors and goals for reduction. Results shall be summarized and submitted with
the next permit renewal. Performance of the MMP will meet the requirements of the TMDL (Total Maximum
Daily Load) for mercury approved by USEPA on October 12, 2012, unless and until a Waste Load Allocation
specific to this facility is developed and this NPDES permit is amended to require further actions to address the
Waste Load Allocation.
A. (9.) SCHEDULE OF COMPLIANCE FOR TOTAL COPPER LIMITATIONS [G.S. 143-215.1(b)]
1. By March 1, 2019, the Permittee shall submit to the Division of Water Resources a Corrective Action
Plan summarizing the strategy or actions to be taken to achieve compliance with the Total Copper
limitations listed in Sections A. (1.) through A. (4.), which includes specific dates for completion or
implementation of each action.
2. By March 1, 2020, the Permittee shall submit a report to the Division summarizing actions taken in
accordance with the Corrective Action Plan submitted and approved by DWR.
3. By March 1, 2021, the Permittee shall submit a report to the Division summarizing actions taken during
the previous year to achieve compliance with the final copper limitations. The actions shall be in
accordance with the Corrective Action Plan submitted and approved by DWR.
4. By March 1, 2022, the Permittee shall submit a report to the Division summarizing actions taken during
the previous year to achieve compliance with the final copper limitations. The actions shall be in
accordance with the Corrective Action Plan submitted and approved by DWR.
5. The Permittee shall achieve compliance with Total Copper limitations specified in Sections A. (1.)
through A. (4.) by November 29, 2022.
Upon approval of the Corrective Action Plan by the Division, the report and actions become an enforceable part
of this permit. Any modifications to the schedule shall be requested to the Division at least ninety (90) days before
the deadline. Modifications to the schedule in excess of four (4) months will be subject to public notice.
Corrective Action Plan and Reports shall include the owner's name, NPDES permit number and Permittee contact
person, and shall be submitted to:
(1) NCDEQ / Division of Water Quality
NPDES Permitting
1617 Mail Service Center
Raleigh, NC 27699-1617
(2) NCDEQ / Division of Water Quality
Wilmington Regional Office
127 Cardinal Drive Ext.
Wilmington, NC 28405
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DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196
Permit NC0023973
A. (10.) 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. (11.) 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: 82350931-7E08-43F3-B31A-0250B4908196
Permit NC0023973
A. (12.) 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)]
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 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.
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).
2. Electronic Submissions
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DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196
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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 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. 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. (11.)(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 certi, 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: 82350931-7E08-43F3-B31A-0250B4908196
Permit 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 [Supplements Section D. (6.)1
The Permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions. These
records or copies shall be maintained for a period of at least three (3) years from the date of the report. This
period may be extended by request of the Director at any time [40 CFR 122.41].
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DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196
Permit NC0023973
Cape Fear Public Utility Authority
M'Kean Maftiitt (Southside) WWTP
Receiving Stream: Cape Fear River 8-Di q it H LI C: 03030005
Latitude: 34'09' 56" N Sub -Basin: 03-06-17
Longitude: 77`56'56" W Permitted Flow: 12.0MGDto24MGD
Stream Class: SC-PNA Grid/Quad: K27 NW !Wilmington
Facility
Location
not to scale
x
NPDES Permit No. NC0023973
New Hanover County
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