NC0021636_Draft Permit_20230516

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
NORTH CAROLINA
Env&w~nW Quality
May 16, 2023
Mr. Brent Trout, Harnett County Manager
Harnett Regional Water
PO Box 1119
Lillington, North Carolina 27546
Subject: Draft NPDES Permit Renewal
Permit NCO021636
North Harnett Regional WWTP
Harnett County
Grade IV Biological WPCS
SIC Code 4952
Dear Mr. Trout:
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:
As the North Harnett Regional WWTP expanded to 7.5 MGD, the 5.6 MGD flow tier
page has been removed from the permit.
As expansion of the North Harnett Regional WWTP has been approved by the Division,
an expansion page has been added to the permit for a 16.5 MGD flow tier [See A.(2.)].
Based on the reasonable potential analysis (RPA) showing no reasonable potential to
violate state water quality standards, the monitoring requirement for total silver has been
removed from the permit [See A.(1)].
A special condition to monitor effluent PFAS chemicals quarterly has been added to the
permit, to be effective six (6) months after EPA has a final wastewater method in 40 CFR136
method published in the Federal Register [See Special Condition A.(7.) PFAS Monitoring
Requirements].
As the facility identified the presence of 1,4-dioxane in their influent during the 2019
investigation for emerging compounds in the Cape Fear River Basin, monthly monitoring for
1,4-dioxane as well as a 1,4-dioxane reopener condition have been added to the permit [See
A.(l.) and A.(2.) and Special Condition A.(8.)].
• For calculation of Total Nitrogen, monitoring for TKN and NO2+NO3 has been added to
the permit at a frequency of 3/week in the summer and monthly in the winter [See A.(1.) and
A.(2.)].
Based on discussion with the Basin Planning Branch in preparation of the Cape Fear
Permitting Strategy, instream monitoring for TP, TKN, NO2+NO3, and ammonia have been
added to the permit at a monthly frequency [See A.(l.) and A.(2.)].
Based on discussion with the Basin Planning Branch and due to the need for instream
data to understand the impact of the facility expansion on the receiving waterbody,
downstream monitoring is only provisionally waived due to membership in the Middle Cape
Fear Basin Association (MCFRBA) if MCFRBA conducts representative downstream
sampling. Should MCFRBA not activate a representative downstream monitoring station, the
downstream monitoring requirements shall immediately be reinstated. This does not impact
the upstream monitoring requirements.
D-F Q�� North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-161 1
919.707.9000

For calculation of Total Nitrogen and Total Phosphorous loadings, monthly monitoring
and reporting of Total Monthly Flow has been added to the permit [See A.(1.) and A.(2.)].
Per request from Harnett Regional Water, a portion of the South Harnett Regional
W WTP's (NC0088366) summer nutrient loading has been transferred to the North Harnett
Regional WWTP, to be implemented upon expansion of the North Harnett Regional WWTP
to 16.5 MGD [See A.(2.)].
• Special Conditions A.(5.) Total Nitrogen Monitoring/Limit and A.(6.) Total Phosphorous
Monitoring/Limit have been consolidated into Special Condition A.(6.) Calculation and
Reporting of Total Nitrogen and Total Phosphorous Loads.
As the Division may request additional monitoring for TN and TP if necessary, Special
Condition A.(7.) Permit Re -opener: Supplementary Nutrient Monitoring has been removed
from the permit.
Per the updated USGS low flow stream statistics provided in preparation of the
development of speculative limitations for the expanded 16.5 MGD flow tier, the percent
effluent specified in the Chronic Toxicity Permit Limit @ 7.5 MGD has been revised.
Some of the wording has changed in Special Condition A.(3.), Chronic Toxicity Permit
Limit, please review each paragraph carefully.
• Special Condition A.(5.) has been modified to include the specific three years in which the
Effluent Pollutant Scan shall be performed (2025, 2026, and 2027). In addition, at the end of
the Special Condition, 2nd species Toxicity Testing Requirements for municipal permit
renewals per Federal Regulations [40 CFR 122.210)(5)] have been added.
• A notation was made concerning the Electronic Reporting Rule — NPDES Electronic
Reporting Rule — Phase 2 Extension. EPA extended the Phase 2 deadline to December 21,
2025.
• 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. (10.)].
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 1). 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:Hbit.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 Harnett 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,
EDZWCA14FD
gmd by:
�'
7...
Nick Coco, PE
NPDES Municipal Permitting Unit
North Carolina Department of Environmental Quality I Division of Water Resources
0b
D E Q�� 512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
9w �� .\ 919.707.9000

Hardcopy: NPDES Files
Ecopy: US EPA Region 4
DWR/Fayetteville Regional Office/Water Quality/Mark Brantley
DWR/Operator Certification Program/Maureen Kinney
DWR/Ecosystems Branch/Mark Vander Borgh
DWR/Aquatic Toxicology Branch/Cindy Moore
DWR/Municipal Permitting Unit/Keyes McGee
DWR/Public Water Supply /Heidi Cox
Harnett Regional Water/North Plant ORC/Billy Thomas
Harnett Regional Water/WW Superintendent/Kenny Fail
MBD Consulting/Joe McGougan, PE
North Carolina Department of Enviromnental Quality 1 Division of Water Resources
4!5 �DWQ
1512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
919.707.9000

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
AL
(NPDES)
Permit NC0021636
In compliance with the provisions of North Carolina General Statute 5.1, other lawful standards
and regulations promulgated and adopted by the North Carolina Enviro Management
Commission, and the Federal Water Pollution Control Act, as amended, the
Harnett Regional Water
is hereby authorized to discharge wastewater from a facility located at the
North Harnett Regional WWTP
607 Edwards Drive
Lillington
Harnett County
to receiving waters designated as the Cape Fear River in the Cape Fear River Basin
in accordance with the effluent limitations, monitoring requirements, and other applicable conditions set
forth in Parts 1, Il, 111, and 1V hereof.
�h_.
This permit shall become effective............ Month xx, 2023.
This permit and authorization to discharge shall expire at midnight on ..................................July 31, 2028.
Signed this day ................... Month xx, 2023.
DRAFT
for Richard E. Rogers, Jr., Director
Division of Water Resources
By Authority of the Environmental Management
Commission
Page 1 of 15

Permit NCO021636
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.
Harnett Regional Water
is hereby authorized to:
1. Continue to operate and maintain the North Harnett Regional WWTP, an existing 7.5 MGD facility
consisting of the following components:
• Influent pump station
• Aerated flow equalization *� °
• Mechanical and manual bar screens.
• Grit classifier with auger
• Instrumented influent and effluent flow
• Dual oxidation ditches
Three centrifugal blowers
Two 434,000 gallon non -aerated tanks A
Dual clarifiers, Four traveling bridge ter
Ultraviolet disinfection facility
steel disc filters
• Cascade post aeration
• Backup generator facility
• Septage receiving station
• Lime storage facility
• Sludge lagoon
2. After receiving an Authorization to Construct from the Division, construct and operate improvements
to increase the average design flow of the wastewater treatment facility to 16.5 MGD; and
3. Discharge from said treatment works at the location specified on the attached map via Outfall 001
into the Cape Fear River, classified WS-IV waters in the Cape Fear River Basin and 03030004 HUC.
Page 2 of 15

Permit NCO021636
PART I
A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [7.5 MGD]
[15A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.] Grade IV
Biological Water Pollution Control System [15A NCAC 08G .0302]
(a.) During the period beginning on the effective date of the permit and lasting until expansion to 16.5
MGD or permit expiration, whichever is sooner, the permittee is authorized to discharge treated
municipal and industrial wastewater from Outfall 001. Such discharges shall be limited and
monitored' by the permittee as specified below:
EFFLUENT LIMITS
MONITORING REQUIREMENTS
PARAMETER
Monthly
Weekly
Daily
Measurement
Sample
Sample
Parameter Code
Average
Average
Maximum
Frequency
Type
Location'
Flow 50050
7.5 MGD
Continuous
Recording
I or E
Total Monthly Flow (MG) 82220
Monitor and Report
Monthly
Calculated
E
BOD, 5 day, 20°C 3
(Apr 1 - Oct 31) C0310
5.0 mg/L
7.5 mg/L
2/week °
Composite
I and E
BOD, 5 day, 20°C 3
C0310
(Nov 1 - Mar 31)
10.0 mg/L
15.0 mg/L
2/�� eek °
Composite
I and E
Total Suspended Solids; C0530
30.0 mg/L
45.0 mg/L
2/week a
Composite
I and E
NH3 as N
(Apr 1 - Oct 31) C0610
1.0 mg/L
3.0 mg/l.
2/week'
Composite
E
NH3 as N C0610
2.0 mg/L,
6.0 mg/L
2/week4
Composite
E
(Nov 1 - Mar 31)
Fecal Coliform 31616
(geometric mean)
200/100 ml.
400/100 mL
2/week4
Grab
E
Dissolved Oxygen 00300
Daily Average >_ 5.0 mg/L
Daily
Grab
E
pH 00400
Between 6.0 and 9.0 Standard Units
Daily
Grab
E
Temperature (°C) 00010
Monitor and Report
Daily
Grab
E
Total Residual Chlorine 5 50060
T 128 µg/L
Daily
Grab
E
Conductivity (µmhos/cm) 00094
Monitor and Report
Daily
Grab
E
TKN (mom)
00625
(Apr 1 -Oct 3 I )
Monitor and Report
;/Week
Composite
E
TKN (mg/L)
00625
(Nov 1 - Mar 31)
Monitor and Report
Monthly
Composite
E
NO3-N + NO2-N (mg/L)
00630
(Apr 1 - Oct 31)
Monitor and Report
3/Week
Composite
E
NO3-N + NO2-N (mg/L)
00630
(Nov 1 - Mar 31)
Monitor and Report
Monthly
Composite
E
Total Nitrogen 6.7 C0600
Monitor and Report (mg/L)
3/Week
(Apr I - Oct 31) QM600
Monitor and Report (lb/month)
Monthly
Calculated
E
QS600
59,968 lb/season (summer mass loading)
Annually
Total Nitrogen (mg/L)
C0600
(Nov I - Mar 31)
Monitor and Report
Monthly
Calculated
>✓
Total Phosphorous' C0665
Monitor and Report (mg/L)
3/Week
QM665
(Apr 1 -Oct 31)
Monitor and Report (lb/month)
Monthly
Composite
I?
QS665
19,989 lb/season (summer mass loading)
Annually
Total Phosphorous (mg/L)
(Nov 1 - Mar 31) C0665
Monitor and Report
Monthly
Composite
L
Continued on next page.
Page 3 of 15

Permit NCO021636
PARAMETER
Parameter Code
EFFLUENT LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
I Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
LocationZ
PFAS variable
Footnote 8
Footnote 8
Grab
E
1,4-Dioxane9 82388
Monitor and Report
Monthly
Grab
E
Chronic Toxicity 10 TGP3B
Monitor and Report
Quarterly
Composite
E
Effluent Pollutant Scan " NCO]
Monitor and Report
Footnote 11
Footnote 11
E
Hardness -Total as CaCO3 (mg/L) 00900
Monitor and Report
Quarterly
Composite
E
Hardness12 -Total as CaCO3 (mg/L) 00900
Monitor and Report
Quarterly
Grab
U
Dissolved Oxygen (mg/L) 00300
Monitor and Report
Variable2
Grab
U and D
Temperature °C 00010
Monitor and Report
Variable2
Grab
U and D
Conductivity (µmhos/cm) 00094
Monitor and Report
Variable2
Grab
U and D
NH3 as N (mg/L) C0610
Monitor and Report
Monthly
Grab
U and D
NO3-N + NO2-N (mg/L) 00630
Monitor and Report
Monthly
Grab
U and D
TKN (mg/L) 00625
Monitor and Report
Monthly
Grab
U and D
Total Phosphorous (mg/L.) C0665
Monitor and Report
Monthly
Grab
U and D
Footnotes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. See Special Condition A.(10.). "
2. Sample locations I -Influent, E-Effluent, U-Upstream at the US Highway 401 Bridge, D-Downstream = 1.3
miles downstream at the boat ramp. Upstream and downstream samples shall be grab samples collected 3/week
during June, July, August, and September and 1 /week during the remainder of the year. Instream sampling
requirements are provisionally waived in light of the petmittee's participation in the Middle Cape Fear River
Basin Association. Should participation in the association cease, all instream sampling requirements are
immediately reinstated. Should representative downstream monitoring not be conducted by the Middle Cape
Fear River Basin Association, downstream monitoring requirements are immediately reinstated until
confirmation of the coalition's activation of such a sampling station is received by the Division.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent value (85% removal).
4. Twice per week sampling must occur on any two non-consecutive days during the calendar week.
5. The facility shall monitor TRC when using chlorination for -disinfection. The Division shall consider all effluent
total residual chlorine values reported below 50 µg/I to be in compliance with the permit. However, the
permittee shall continue to record and submit all values reported by a North Carolina certified laboratory
(including field certified), even if these values fall below 50 µg/1.
6. For a given wastewater sample, TN = TKN + NO3-N + NO2-N, where TN is Total Nitrogen, TKN is Total
Kjeldahl Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively.
7. See A.(6.) for Total Nitrogen and Total Phosphorous Load calculations.
8. See Special Condition A.(7.).
9. Samples will be analyzed and reported using sufficiently sensitive test procedures (i.e., methods) approved
under 40 CFR part 136 for the analysis of pollutants or pollutant parameters.
10. Chronic Toxicity (Ceriodaphnia dubia) P/F at 4.0% with testing in January, April, July and October. See
Special Condition A.(3.).
11. The permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition
A.(5.).
12. The permittee shall sample instream hardness upstream of the facility's discharge. The sample shall be
representative of the hardness in the stream.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 4 of 15

Permit NCO021636
A.(2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS 116.5 MGD]
[15A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.] Grade IV
Biological Water Pollution Control System [15A NCAC 08G .0302]
(a.) During the period beginning upon expansion to 16.5 MGD and lasting until permit expiration, the
permittee is authorized to discharge treated municipal and industrial wastewater from Outfall 001.
Such discharges shall be limited and monitored' by the permittee as specified below:
EFFLUENT LIMITS
MONITORING REQUIREMENTS
PARAMETER
Monthly Average
Weekly
Daily
Measurement
Sample
Sample
Parameter Code
Average
Maximum
Frequency
Type
Location'
Flow 50050
16.5 MGD
Continuous
Recording
I or E
Total Monthly Flow (MG) 82220
Monitor
and Report
Monthly
Calculated
E
BOD, 5 day, 20°C 3 C0310
2.1 mg/L
3.1 mg/L
Daily4
Composite
I and E
Total Suspended Solids3 C0530
15.0 mg/L
22.5 mg/L
Daily4
Composite
I and E
Nlit as N
(Apr 1 -Oct 31) C0610
0.5 mg/L
1.5 mg/L
Daily4
Composite
E
NFb as N
C0610
(Nov 1 - Mar 31)W.
0.9 mg/L
7 mg/L
Daily4
Composite
E
Fecal Coliform
31616
(geometric mean)
200/100 mL
400/100 mL
Daily4
Grab
E
Dissolved Oxygen 00300
Daily Average >_ 5.0 mg/L
Daily
Grab
E
pH 00400
Between 6.0 and 9.0 Standard Units
Daily
Grab
E
Temperature (°C) 00010
Monit6rand Report
Daily
Grab
E
Total Residual Chlorine 5 50060
1 1 28 µg/L
Daily
Grab
E
Conductivity (µmhos/cm) 00094
Monitor and Report
Daily
Grab
E
TKN (mg/L)
00625
(Apr 1 - Oct 31)
Monitor and Report
3/Week
Composite
E
TKN (mg/L)
00625
(Nov 1 - Mar 31)
Monitor and Report
Monthly
Composite
E
NO3-N + NO2-N (mg/L)
(Apr 1 - Oct 31) 00630
Monitor and Report
3/Week
Composite
E
NO3-N + NO2-N (mg/L)
00630
(Nov 1 - Mar 31)
Monitor and Report
Monthly
Composite
E
Total Nitrogen6j.; C0600
Monitor and Report (mg/L)
3/Week
(Apr 1 -Oct 31) ' QM600
Monitor and Report (lb/month)
Monthly
Calculated
E
QS600
115,5501b/season
Seasonally
Total Nitrogen" (mg/L)
C0600
(Nov 1 - Mar 31)
Monitor and Report
Monthly
Calculated
E
Total Phosphorous 6.7 C0665
Monitor and Report (mg/L)
3/Week
(Apr 1 - Oct 31) Q` W
Monitor and Report (lb/month)
Monthly
Composite
E
QS665
38,5171b/season
Seasonally
Total Phosphorous (mg/L)
(Nov 1 - Mar 31) C0665
Monitor and Report
Monthly
Composite
E
PFAS variable
Footnote 8
Footnote 8
Grab
E
1,4-Dioxane9 82388
Monitor and Report
Monthly
Grab
E
Chronic Toxicity 10 TGP3B
Monitor and Report
Quarterly
Composite
E
Continued on next page.
Page 5 of 15

Permit NCO021636
PARAMETER
Parameter Code
EFFLUENT LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location'
Effluent Pollutant Scan NCO/
Monitor and Report
Footnote 11
Footnote 11
E
Hardness -Total as CaCO3 (mg/L) 00900
Monitor and Report
Quarterly
Composite
E
Hardness" -Total as CaCO3 (mg/L) 00900
Monitor and Report
Quarterly
Grab
U
Dissolved Oxygen (mg/L) 00300
Monitor and Report
Variable'
Grab
U and D
Temperature °C 00010
Monitor and Report
Variable'
Grab
U and D
Conductivity (µmhos/cm) 00094
Monitor and Report
Variable'
Grab
U and D
NM as N (mg/L) C0610
Monitor and Report
Monthly
Grab
U and D
NO3-N + NO2-N (mg/L) 00630
Monitor and Report
Monthly
Grab
U and D
TKN (mg/L) 00625
Monitor and Report
Monthly
Grab
U and D
Total Phosphorous (mg/L) C0665
Monitor and Report
Monthly
Grab
U and D
Footnotes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. See Special Condition A. (10.).
2. Sample locations I -Influent, E-Effluent, U-Upstream at the US Highway 401 Bridge, D-Downstream = 1.3
miles downstream at the boat ramp. Upstream and downstream samples shall be grab samples collected 3/week
during June, July, August, and September and 1/week during the remainder of the year. Instream sampling
requirements are provisionally waived in light of the permittee's participation in the Middle Cape Fear River
Basin Association. Should participation in the association cease, all instream sampling requirements are
immediately reinstated. Should representative downstream monitoring not be conducted by the Middle Cape
Fear River Basin Association, downstream monitoring requirements are immediately reinstated until
confirmation of the coalition's activation of such a sampling station is received by the Division.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent value (85% removal).
4. Once the 16.5 MGD limits page has been placed into effect and after six (6) consecutive months of daily
sampling, the Permittee may request a reduction in the monitoring frequency to twice per week sampling for
any of the four parameters (BOD5, TSS, NH3-N and Fecal coliform) for which no effluent permit limit
violations have occurred. Twice per week sampling must occur on any two non-consecutive days during the
calendar week. This future change in monitoring frequency for these parameters would be considered a minor
permit modification.
5. The facility shall monitor TRC when usingchlorination 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/1.
6. For a given wastewater sample, TN = TKN + NO3-N + NO2-N, where TN is Total Nitrogen, TKN is Total
Kjeldahl Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively.
7. See A.(6.) for Total Nitrogen and Total Phosphorous Load calculations.
8. See Special Condition A.(7.).
9. Samples will be analyzed and reported using sufficiently sensitive test procedures (i.e., methods) approved
under 40 CFR part 136 for the analysis of pollutants or pollutant parameters.
10. Chronic Toxicity (Ceriodaphnia dubia) P/F at 8.3% with testing in January, April, July and October. See
Special Condition A.(4.).
11. The permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition
A.(5.).
12. The permittee shall sample instream hardness upstream of the facility's discharge. The sample shall be
representative of the hardness in the stream.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 6of15

Permit NCO021636
A.(3.) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY) @ 7.5 MGD
[15A NCAC 02B .0200] [15A NCAC 02B .0500 et seq]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dubia at an effluent concentration of 4.0%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in
the "North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," (Revised December 2010, or
subsequent versions) or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"
(Revised December 2010, or subsequent versions). The tests will be performed during the months of
January, April, July, and October. These months signify the first month of each three-month toxicity
testing quarter assigned to the facility. Effluent sampling for this testing must be obtained during
representative effluent discharge and shall be performed at the NPDES permitted final effluent discharge
below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV
below the permit limit, then multiple -concentration testing shall be performed at a minimum, in
each of the two following months as described in "North Carolina Phase II Chronic Whole Effluent
Toxicity Test Procedure" (Revised -December 2010, or subsequent versions).
All toxicity testing results required as part of this permit condition will be entered electronically using the
Division's eDMR system for the months in which tests were performed, using the parameter code
TGP311 for the pass/fail results and THP311 for the Chronic Value. Additionally, DWR Form AT-3
(original) is to be sent to the following address:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, NC 27699-1621
Or, results can be sent to the email, [e-mail].
Completed Aquatic Toxicity Test Forms shall be filed with the Wate ciences 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 them be no discharge of flow from the facility during a month in which toxicity monitoring is
required, the permittee will complete the information located at the top of the aquatic toxicity (AT) test
form indicating the facility name, permit number, pipe number, county, and the month/year of the report
with the notation of "No Flow" in the comment area of the form. The report shall be submitted to the
Water Sciences Section at the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring
will be required during the following month. Assessment of toxicity compliance is based on the toxicity
testing quarter, which is the three-month time interval that begins on the first day of the month in which
toxicity testing is required by this permit and continues until the final day of the third month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division
of Water Resources indicate potential impacts to the receiving stream, this permit may be re -opened and
modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival, minimum control organism reproduction, and appropriate environmental controls,
shall constitute an invalid test and will require immediate follow-up testing to be completed no later than
the last day of the month following the month of the initial monitoring.
Page 7 of 15

Permit NC0021636
A.(4.) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY) @ 16.5 MGD
[15A NCAC 02B .0200] [15A NCAC 02B .0500 et seq]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dubia at an effluent concentration of 8.3%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in
the "North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," (Revised December 2010, or
subsequent versions) or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"
(Revised December 2010, or subsequent versions). The tests will be performed during the months of
January, April, July, and October. These months signify the first month of each three-month toxicity
testing quarter assigned to the facility. Effluent sampling for this testing must be obtained during
representative effluent discharge and shall be performed at the NPDES permitted final effluent discharge
below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV
below the permit limit, then multiple -concentration testing shall be performed at a minimum, in
each of the two following months as described in "North Carolina Phase II Chronic Whole Effluent
Toxicity Test Procedure" (Revised -December 2010, or subsequent versions).
All toxicity testing results required as part of this permit condition will be entered electronically using the
Division's eDMR system for the months in which tests were performed, using the parameter code
TGP311 for the pass/fail results and THP3B for the Chronic Value. Additionally, DWR Form AT-3
(original) is to be sent to the following address:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, NC 27699-1621
Or, results can be sent to the email, [e-mail].
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30
days after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by, laboratory supervisor and ORC or approved designate
signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if
chlorine is employed for disinfection of the_ waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is
required, the permittee will complete the information located at the top of the aquatic toxicity (AT) test
form indicating the facility name, permit number, pipe number, county, and the month/year of the report
with the notation of "No Flow" in the comment area of the form. The report shall be submitted to the
Water Sciences Section at the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring
will be required during the following month. Assessment of toxicity compliance is based on the toxicity
testing quarter, which is the three-month time interval that begins on the first day of the month in which
toxicity testing is required by this permit and continues until the final day of the third month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division
of Water Resources indicate potential impacts to the receiving stream, this permit may be re -opened and
modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival, minimum control organism reproduction, and appropriate environmental controls,
shall constitute an invalid test and will require immediate follow-up testing to be completed no later than
the last day of the month following the month of the initial monitoring.
Page 8 of 15

Permit NCO021636
A.(5.) ADDITIONAL MONITORING REQUIREMENTS FOR PERMIT RENEWAL
[G.S. 143-215.1(B)]
(a.) Effluent Pollutant Scans. The permittee shall perform a total of three (3) Effluent Pollutant Scans for
all parameters listed below. One scan must be performed in each of the following years: 2025, 2026,
and 2027. For the 16.5 MGD flow tier, the Permittee shall perform three effluent pollution scans in the
three following years after expansion occurs. Analytical methods shall be in accordance with 40 CFR
Part 136 and shall be sufficiently sensitive to determine whether parameters are present in
concentrations greater than applicable standards and criteria. Each annual sample shall coincide with
one quarterly toxicity test each year (see Conditions A.(3.) and A.(4.)), and each must be collected in a
different calendar quarter to represent seasonal variation [i.e., do not sample in the same quarter every
year]. Unless otherwise indicated, metals shall be analyzed as&gal recoverable."
Ammonia (as N) C0610 Trans-1,2-dichloroethyle. 34546 Bis (2-chloroethyl) ether 34273
Chlorine (total residual, TRC) 50060 1, 1 -dichloroethylene 34501 Bis (2-chloroisopropyl) ether 34283
Dissolved oxygen 00300 1,2-dichloropropane C0541 Bis (2-ethylhexyl) phthalate C0I00
Nitrate / Nitrite 00630 1,3-dichloropropylene 77163 4-bromophenyl phenyl ether 34636
Kjeldahl nitrogen 00625 Ethylbenzene 34371 Butyl benzyl phthalate 34292
Oil and grease 00556 Methyl bromide 34413 2-chloronaphthalene 34581
Phosphorus
C0665
Methyl chloride
34418
4-chlorophenyl phenyl ether
34641
Total dissolved solids
70295
Methylene chloride -
34423
Chrysene
34320
Hardness
0090Qpwy
1,1,2,2-tetrachloroethane
8/549
Di-n-butyl phthalate
39110
Antimony
01097
Tetrachloroethylene
34475
Di-n-octyl phthalate
34596
Arsenic
01002
Toluene
34010
Dibenzo(a h)anthracene
34556
Beryllium
01012
1, 1, 1 -trichloroethane
34506
1,2-dichlorobenzene
34536
Cadmium
01027
1,1,2-trichloroethane
34511
1,3-dichlorobenzene
34566
Chromium
C0034
Trichloroethylene
0180
1,4-dichlorobenzene
34571
Copper
01042
Vinyl chloride
3917S
3,3-dichlorobenzidine
34631
Lead
01051 Acid -extractable compounds:
Diethyl phthalate
34336
Mercury (Method 1631E)
COAER
P-chloro-m-cresol
34452
Dimethyl phthalate
34341
Nickel _
01067
2-chlorophenol
34586
2,4-dinitrotoluene
34611
Selenium
01147
2,4-dichlorophenol
34601
2,6-dinitrotoluene
C0626
Silver
01077
2,4-dimethylphenol
34606
1,2-diphenylhydrazine
34346
Thallium
07059
4,6-dinitro4--resol
34657
Fluoranthene
C0376
Zinc
01092"_
2,4-dinitrophenol
34616
Fluorene
34381
Cyanide
00720
2-mtrophenol
34591
Hexachlorobenzene
C0700
Total phenolic compounds
32730
4-nitrophenol
34646
Hexaehlorobutadiene
C0702
Volatile organic compounds:
Pentachlorophenol
39032
Hexachlorocyclo-pentadiene
34386
Acrolein
34210
Phenol
34694
Hexachloroethane
34396
Acrylonitrile
34215
2,4,6-trichlorophenol
34621
Indeno(1,2,3-cd)pyrene
34403
Benzene
34030 Base -neutral compounds:
Isophorone
34408
Bromoform
32104
Acenaphthene
34205
Naphthalene
34696
Carbon tetrachloride
32102
Acenaphthylene
34200
Nitrobenzene
34447
Chlorobenzene
34301
Anthracene
CO220
N-nitrosodi-n-propylamine
34428
Chlorodibromomethane
34306
Benzidine
39120
N-nitrosodimethylamine
34438
Chloroethane
85811
Benzo(a)anthracene
C0526
N-nitrosodiphenylamine
34433
2-chloroethyl vinyl ether
34576
Benzo(a)pyrene
34247
Phenanthrene
34461
Chloroform
32106
3,4 benzofluoranthene
34230
Pyrene
34469
Dichlorobromomethane
32101
Benzo(ghi)perylene
34521
1,2,4-trichlorobenzene
C0551
1, 1 -dichloroethane
34496
Benzo(k)fluoranthene
34242
1,2-dichloroethane
32103
Bis (2-chloroethoxy) methane
34278
Page 9 of 15

Permit NCO021636
(b.) Effluent Scan Resorting. Test results shall be reported electronically via eDMR by December
31 st of each designated sampling year, except that, subject to prior written approval by the Director,
results can be reported on DWR Form DMR-PPA-1 or other form approved by the Director. The
permittee must at least report completion of the test in the eDMR system by entering "1" or "Y" for
parameter code NCO - Annual Pollutant Scan. If written reports are approved, the report shall be
submitted to the following address:
North Carolina Division of Water Resources
Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Or the form may be uploaded at: https://edocs.deq.nc.govu„orms/NPDES_WW-EDMR-
Supplemental-Form
(c) 2nd-Species Toxicity Testing and Reporting.
(i.) In addition to the quarterly toxicity tests required in ConditionsIRc(3.) and A.(4.), the
Permittee shall perform and report the results of four (4) toxicity tests using the same test
methods using a second species of test organism suitable to the tests being conducted.
(ii.) The 2nd species toxicity tests shall be conducted either:
(A) Once per quarter in 'a single 12-month period (four samples); if this option is chosen,
the sample for each 2nd species test shall coincide with the quarterly samples collected
for (tox condition title); or
(B) Once per 12-month period in the four -and one-half year period prior to the scheduled
application for permit renewal(four samples); if this option is chosen, three of the
sample for the 2nd species tesi shall coincide with those for the annual effluent scans
and the coincident quarterly toxicity test, and each of the four annual samples shall be
collected in a different calendar quarter in order to represent seasonal variation.
of the toxicity tests shall be submitted to the following address:
North Carolina Division of Water Resources
Water Sciences '` - �on/Aquatic Toxicology Branch
MIMM
1621 Mail Service er
Raleigh, North Caro a 27699-1621
Or, results can be sent to the email, [e-mail].
(iv.) Results of the 2"d species tests shall also be summarized in Part E (Toxicity Testing Data) of
EPA Municipal Application Form 2A when submitting the permit renewal application to the
NPDES Wastewater Program.
The Penmittee may contact the Division's Aquatic Toxicology Branch at 919-743-8401 for
guidance on conducting the additional toxicity tests and reporting of the results.
Page 10 of 15

Permit NCO021636
A.(6.) CALCULATION AND REPORTING OF TOTAL NITROGEN AND TOTAL
PHOSPHORUS LOADS
[G.S. 143-215.1 (B)]
(a.) The Permittee shall calculate seasonal and annual mass loads for TN and TP as follows:
(i.) Monthly TN (or TP) Load (lb/mo) = TN (or TP) x TMF x 8.34
where:
TN or TP = the average Total Nitrogen or Total Phosphorus concentration
(mg/L) of the composite samples collected during the month
TMF = the Total Monthly Flow of wastewater discharged during the month
(MG/mo); that is, the sum of daily flows in the month
8.34 = conversion factor, from (mg/L x MG) to pounds
(ii.) Summer TN (or TP) Load (lb/season) = Sum of the Monthly TN (or TP) Loads for April -
October.
(b.) The Permittee shall report monthly Total Nitrogen and Total Phosphorus Load results (lb/mo) in the
appropriate discharge monitoring report for each month; and the summer TN and TP Load results
with the October DMR.
(c.) Any addition, deletion, or modification of the listed allocation(s) (other than to correct
typographical errors) or any change in status of any of the listed allocations shall be considered a
major modification of this permit and shall be subject to the lic review process afforded such
modifications under state and federal rules.
A.(7.) PFAS MONITORING REQUIREMENT
[G.S. 143-215.1(b.)]
This reporting requirement for the per- and polyfluoroalkyl substances (PFAS) parameters listed under
Table 1 of the Final M kes effect the first full calendar quarte# following six (6) months after
EPA publishes a 40 CFR p l PFAS Method for wastewater in the Federal Register. Monitoring
will be at a quarterly frequency.
Find the current parameters listed under Table 1 of the 3`d Draft Method 1633 Analysis of Per- and
Polyfluoroalkyl Substances (PFAS) in Aqueous, Solid, Biosolids, and Tissue Samples by LC-MS/MS at:
A.(8.) 1,4-DIOXANE RE -OPENER
[N.C.G.S. 143-215.1 (b)] `*
Pursuant to N.C. G6eral Statutes Section 143-215.1 and the implementing rules found in the North
Carolina Administrative Code at 15A NCAC 2H.0112 (b) (1) and 2H.0114 (a) and Part II, Sections B-12
and 13-13 of this permit, the Director of DWR may reopen this permit to modify permit requirements to
address 1,4-Dioxane monitoring, treatment and/or compliance.
A.(9.) MERCURY MINIMIZATION PLAN (MMP)
[N.C.G.S. 143-215.1 (B)]
The Permittee shall maintain and continue to implement the Mercury Minimization Plan (MMP)
developed in the previous permit term. The MMP shall continue to be available for inspection on -site.
The MMP should place emphasis on identification of mercury contributors and goals for reduction.
Results shall be summarized and submitted with the next permit renewal. Performance of the MMP will
meet the requirements of the TMDL (Total Maximum Daily Load) for mercury approved by USEPA on
October 12, 2012, unless and until a Waste Load Allocation specific to this facility is developed and this
NPDES permit is amended to require further actions to address the Waste Load Allocation.
Page 11 of 15

Permit NCO021636
A.(10.) ELECTRONIC REPORTING - DISCHARGE MONITORING REPORTS
[G.S. 143-215.1 (b)]
Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program
reports. The final NPDES Electronic Reporting Rule was adopted and became effective on December 21,
2015.
NOTE: This special condition supplements or supersedes the following sections within Part II of this
permit (Standard Conditions for NPDES Permits):
• Section B. (11.) Signatory Requirements
• Section D. (2.) 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 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.
Monitoring results obtained during the previous month(s) shall be summarized for each month and
reported via the eDMR system no later than the last calendar day of the month following the
completed reporting period. Regardless of the submission method, the first DMR is due on the last
day of the month following the issuance of the permit or in the case of a new facility, on the last day
of the month following the commencement of discharge.
Starting on December 21, 2025, the permittee must electronically report the following compliance
monitoring data and reports, when applicable:
• Sewer Overflow/Bypass Event Reports; and
• Pretreatment Program Annual Reports; and
• Clean Water Act (CWA) Section 316(b) Annual Reports.
The permittee may seek an electronic reporting waiver from the Division (see "How to Request a
Waiver from Electronic Reporting" section below).
Page 12 of 15

Permit NC0021636
2. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9), the permittee must identify the initial recipient at the time of
each electronic submission. The permittee should use the EPA's website resources to identify the
initial recipient for the electronic submission.
Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity
(EPA or the state authorized by EPA to implement the NPDES program) that is the designated entity
for receiving electronic NPDES data [see 40 CFR 127.2(b)].
EPA plans to establish a website that will also link to the appropriate electronic reporting tool for
each type of electronic submission and for each state. Instructions on how to access and use the
appropriate electronic reporting tool will be available as well. Information on EPA's NPDES
Electronic Reporting Rule is found at: https://www.federalregister.gov/documents/2015/10/22/2015-
Electronic submissions must start by the dates Wted Ili 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 Divisio obtain an
electronic reporting waiver, a permittee must first submit an electronic reporting w ver request to the
Division. Requests for temporary electronic reporting waivers must be submitted in writing to the
Division for written approval at least sixty (60) days prior to the date the facility would be required
under this permit to begin submitting monitoring data and reports. The duration of a temporary
waiver shall not exceed 5 years and shall thereupon expire. At such time, monitoring data and reports
shall be submitted electronically to the Division unless the permittee re -applies for and is granted a
new temporary electronic reporting waiver by the Division. Approved electronic reporting waivers
are not transferrable. Only permittees with an approved reporting waiver request may submit
monitoring data and reports on paper to the Division or 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. (I I.)(a) or by a duly authorized representative of that person as described in Part II,
Section B. (I 1.)(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
Page 13 of 15

Permit NC0021636
Certification. Any person submitting an electronic DMR using the state's eDMR system shall make
the following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION
WILL BE ACCEPTED:
"I certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the information,
the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I
am aware that there are significant penalties for submitting false information, including the
possibility offines and imprisonment for knowing violations. " e
5. Records Retention [Supplements Section D. (6.)]
The permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions.
These records or copies shall be maintained for a period of at least 3 years from the date of the report.
This period may be extended by request of the Director at any time [40 CFR 122.41 ].
Page 14 of 15

Permit NCO021636
'' -raa �� n? j •,':'
Qj
c • '' vt — - t/. ��� % _�� ,,.l�I (5-
North Harnett County Regional WWTP
NPDES NC D021636 Facility
Location •
State Grid L.frg" Outtall 001 Latitude 35' 2' 51 N Not to scale
Permitted Flow 7.5 M(3D? 16.5 MGD Outfall 001 Longitude 79'47 25' W
Sub Basin. OI-W7 River Basin. C'ax Few Rver Bass NPDES Permit No. NC0021636
Receiving Stre": Cape Fear River Stream Class 'h&[J North
Harnett County
Page 15 of 15