NC0025453_Informatinal Copy_20201027

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH
Director
Mr. J D Solomon, Town Manager
Town of Clayton
I I I East Second Street
Clayton, North Carolina 27528
Dear Mr. Solomon:
NORTH CAROLINA
Environmental Quality
October 27, 2020
Subject: Informational Copy
Draft NPDES Permit Modification
Permit NCO025453
Little Creek WRF
Johnston County
Grade IV Biological WPCS
SIC Code 4952
The Division has reviewed the Town of Clayton's September 11, 2020 request for modification of
the subject permit to, respectively, transfer nitrogen allocation purchased from International Paper
— New Bern (NC0003191) and to authorize expansion of the Little Creek WRF to 6.0 MGD and
to 10.0 MGD capacity. Enclosed for submittal in your ER/EID document to the Division of Water
Infrastructure is a copy of the Draft NPDES permit modification for your facility. We intend to
publish notice of this permit, inviting public comments, on November 10, 2020, contingent upon
NPDES permit NC0003191 being modified to reflect the nitrogen allocation transfer and
submitted for Public Comment on the same date. Please review this draft carefully to ensure
thorough understanding of the requirements and conditions it contains.
This draft permit contains several changes from the existing permit, including the following:
• As expansion of the Little Creek WRF has been approved by the Division, expansion
pages have been added to the permit for 6.0 MGD and 10.0 MGD flow tiers [See A.(2.),
and A.(3)].
• Chronic toxicity limit language has been updated to accommodate for the expanded flow
tiers [See A.(4.)].
• Total nitrogen credits and offset tables have been added to accommodate for the expanded
flow tiers [See A.(8.)].
• Special Condition A.(3.) has been modified to include the specific three years in which the
Effluent Pollutant Scan shall be performed (2022, 2023, and 2024). 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 — Phase 2 Extension. EPA
is proposing to extend the Phase 2 deadline from December 21, 2020, to December 21,
2025. The current compliance date will be extended if the implementation date is extended
as a final regulation change in the federal register [See A.(9.)].
D Q15_
� North Carolina Department of Environmental Quality I Division of Water Resources
E_ 512 North Salisbury Street 1 1617 Mail Service Center I Raleigh. North Carolina 27699-1617
NORTH Ga.F1[,y INA
919.707.9000

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:/ibit.ly/2BZ4xxx 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 Johnston 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 the public notice comment period begins.
Following the 30-day public comment period, the Division will review all pertinent comments on
the modification and take appropriate action prior to issuing a modified final permit. If you have
questions concerning this draft permit, please contact me at [phone] or by email at
nick. [e-mail].
Sincerely,
71v� e4-�
Nick Coco, Engineer
NPDES Municipal Permitting Unit
Hardcopy: NPDES Files
Ecopy: DWI/Ken Pohlig
DWR/Industrial Permitting Unit/David Hill
DWR/Raleigh Regional Office/Water Quality/Scott Vinson
Town of Clayton /James Warren
Jacobs Engineering/Consultant/Jaime Robinson
Page 2 of 2

Permit NCO025453
6011hV4Iwe) 00to] 0111*Kel:�tie] 010►.1
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
r
In compliance with the provisions of North Carolina General Statute 143-215. other lawful standards
and regulations promulgated and adopted by the North Carolina Environmental Management
Commission, and the Federal Water Pollution Control Act, as amen ed, the
Town of Clayto
is hereby authorized to discharge wastewater from a facility to ated at the
Little Creek Water Reclamation Facility
1000 Durham Street Extension
Clayton
Johnston County
AW
to receiving waters d ated as the Neuse River i �heuse River Basin
in accordance with the effluent limitations, monitoring requirements, and other applicable conditions
set forth in Parts I, II, III, and IV hereof.
This permit shall become effective............................................................................................. Month xx, 2020.
This permit and Iauthori ion to discharge shall expire at midnight on ............................. March 31, 2024.
Signed this day .............. Month xx, 2020.
S. Daniel Smith, Director
Division of Water Resources
By Authority of the Environmental Management Commission

Permit NCO025453
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 Town of Clayton
is hereby authorized to:
1. Continue to operate and maintain an existing 2.5 MGD wastewater Centfacility consisting of
the following components: Oio
• mechanical screening and grit remov�'
• influent pump station
• 214,500 gallon anaerobic basin,
• 300,000 gallon anoxic tank,
• oxidation basin No. 2,
• 200,000 gallon anoxic tank
• oxidation basin No. 1,
• three (3) secondary clarifiers,
• two tertiary filters,
• ultraviolet disinfection with back-up
• 90,000 gallon aerated digester/sludg
• 360,000 gallon sludge holding tank,
• sludge loading station,
• sludge thickening bu#ling with rota
• non -potable water system usin recl
reclaimed water pump station
1h, #
This facility is located at the Little Creek Water Reclamation Facility, Durham Street Extension,
Clayton, JCounty, and _
K
3. After recel,
certification,
Zg an Au th zationf Construct from the Division and submitting an engineer's
construct operate a 6.0 MGD wastewater treatment facility.
Frization to Construct from the Division and submitting an engineer's
and operate a 10.0 MGD wastewater treatment facility.
4. Discharge from Taid treatment works at the location specified on the attached map via Outfall 001
into the Neuse River, classified WS-IV, NSW, CA waters in the Neuse River Basin.
Page 2 of 18

Permit NCO025453
PART
A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [2.5 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 expiration, the
permittee is authorized to discharge treated municipal and industrial wastewater from Outfall
001. Such discharges shall be limited and monitored' by the permittee as specified below:
PARAMETER
Parameter Code
EFFLUENT LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
LocationZ
Flow 50050
2.5 MGD
Pr Continuous
Recording
I or E
Total Monthly Flow (MG) 82220
Monitor and Report
Monthlyffi
Calculated
E
BOD, 5 day, 20°C3 C0310
(April 1- October 31)
5.0 mg/L
7.5 mg/L
2/week $
Composite
I and E
BOD, 5 day, 20°C3 C0310
(November 1- March 31)
10.0 mg/L
15.0 mg/L
2/week$
Composite
I and E
Total Suspended Solids3 C0530
30.0 mg/L
45.0 mg/L
week$
Composite
I and E
NH3 N C0610
(Aprpr 1- Oct 31)
1.0 mg/L
3.0 mg/L
2/week$
Composite
E
NH3 as N C0610
(Nov 1- Mar 31)
2.0 mg/
6.0 mg/L
2/week$
Composite
E
Fecal Coliform 31616
(geometric mean)
200/100 m
/100 mL
2/week$
Grab
E
Dissolved Oxygen 00300
Daily
Xverage >_ 6.0 mg/L
OF 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 50060
28 pg/L
Daily
Grab
E
Conductivity (pmhos/cm) 00094
Monitor and Report
Daily
Grab
E
Total Phosphorus (mg/L) C0665
2.0 mg/L (Quarterly Average)
Weekly
Composite
E
TKN (mg/L) 14 00625
Monitor and Report
Weekly
Composite
E
NO3-N + NO2-N (mg/L) 0
Monito d Report
Weekly
Composite
E
Total Nitrogen5 (mg/L)
Monito nd Report
Weekly
Calculated
E
TN Load e,io QM
QV60
Monitor and Report (lb/month)
222,832lb/yr
Monthly
Annually
Calculated
E
Bis (2-ethylhexyl) phthalate pg/L) 39100
IqlaW Monitor and Report
Quarterly
Composite
E
Chronic Toxicity6 TGP3B
Monitor and Report
Quarterly
Composite
E
Pollutant Scan? NC01
Monitor and Report
Footnote 7
Footnote 7
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 (m /L) 00300
Monitor and Report
Variable2
Grab
U and D
Temperature °C 00010
Monitor and Report
Variable2
Grab
U and D
Conductivity (pmhosjc:1qjW 00094
Monitor and Report
Variable2
Grab
U and D
Fecal Coliform (#/100mfr 31616
(geometric mean)
Monitor and Report
Variable2
Grab
U and D
Footnotes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. See Special Condition A. (9).
Footnotes continue on the next
Page 3 of 18

Permit NC0025453
Footnotes continued from A. (1.) Effluent Limitations and Monitoring Requirements:
2. Sample locations I -Influent, E-Effluent, U-Upstream = at NCSR 1700, D-Downstream = (1) NC HWY 42 and
(2) NCSR 1908. 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 Lower Neuse River Basin Association.
Should participation in the association cease, all instream sampling requirements are immediately reinstated.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent value (85% removal).
4. The 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 valu#. fall below 50 µg/l.
5. For a given wastewater sample, TN = TKN + NO3-N + NO2-N, where TN is Total Nitrogen, TKN is Total
Kjeldahl Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively.
6. Chronic Toxicity (Ceriodaphnia dubia) P/F at 2% with testing in March, June, Se mber, and December. See
Special Condition A. (4.). ��
7. The permittee shall perform three effluent pollution scans during the term of this p See Special
Condition A. (5.).
8. Twice per week sampling must occur on any two non-consecutive days during the calen
9. TN Load is the mass load of TN discharged by the pe*ittee in a period of time. See Specia ondition A. (6.).
10. Compliance with these limits shall be determined in accordance with Special Condition A. 7.), Annual Limits
for Total Nitrogen.
11. The permittee shall sample instream hardness upstream of the 7am%e
discharge. The sample shall be
representative of the hardness in the stream. If the permittee is of the Monitoring Coalition
Program, sampling for instream hardness may be ived as loas th ing Coalition agrees to
sample hardness at the nearest upstream locatio muequen quarterly, and the permittee
has obtained approval from DWR -NPDES Pe itting nit that the upstream station being monitored by the
coalition is representative of the receiving strea or t ischarge. The permittee is responsible for
submitting instream hardness test results with it D s as results are received from the coalition. If coalition
membership is cancelled or the Monitoring Coalition terminates instream hardness sampling at the approved
station, the permittee Al immediately notify the D$'sind on aresume sampling for instream hardness,
upstream of its discharge, as required in Section A. uent hardness shall be performed in conjunction
with testing for hardness depends t metals (cadmiupper, lead, nickel, silver, and zinc).
b. Ther ischar floating solids or visible foam in other than trace amounts.
Page 4 of 18

Permit NCO025453
A.(2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [6.0 MGD]
[15A NCAC 02B .0400 et seq.,15A NCACO2B .0500 et seq.] Grade IV
Biological Water Pollution Control System [15A NCAC 08G .0302]
a. Beginning upon receipt of the Engineer's Certification for completion of the expansion to 6.0
MGD and lasting until expansion above 6.0 MGD or permit expiration, whichever comes first, the
Permittee is authorized to discharge treated wastewater from Outfall 001. Such discharges shall
be limited and monitored' by the Permittee as specified below:
PARAMETER
Parameter Code
EFFLUENT LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location2
Flow 50050
6.0 MGD
Continuous
Recording
I or E
Total Monthly Flow (MG) 82220
Monitor and Report
Monthly
Calculated
E
BOD, 5 day, 20°C3 C0310
(April 1- October 31)
5.0 mg/L
7.5 mg/L
2/week
Composite
I and E
BOD, 5 day, 20°C3 C0310
(November 1- March 31)
10.0 mg/L
15.0 mg/L
2/week$
Composite
I and E
Total Suspended Solids3 C0530
30.0 mg/L
45.0 mg
2/week$
Composite
I and E
NH3 as N C0610
(Apr 1- Oct 31)
1.0 mg/L
3.0 mg/L
eeV
C040site
E
NH3 as N C0610
(Nov 1- Mar 31)
2.0 mg/L
6.0 mg/L
S2/week$
Composite
E
Fecal Coliform 31616
(geometric mean)
200/100 mL
400/100 mL
2/week$
Grab
E
Dissolved Oxygen 00300
Daily Average >_ 6.0 mg/L
aily
Grab
E
pH 00400
Between 6.0 and 9.0 Standard Units
Daily
Grab
E
Temperature °C 00010
Moni and Report
Daily
Grab
E
Total Residual Chlorine' 50060
1 r 1 28 lag/L
Daily
Grab
E
Conductivity (pmhos/cm) 00094
Monitor and Report
Daily
Grab
E
Total Phosphorus (mg/L) C0665
2.0 mg/L (Quarterly Average)
Weekly
Composite
E
TKN (mg/L) A 00625
Monitor and Report
Weekly
Composite
E
NO3-N + NO2-N (mg/L 00630
Monitor and Report
Weekly
Composite
E
Total Nitrogen5 (mg/L) C0600
Monitor and Report
Weekly
Calculated
E
TN Load 9,10 QM600
QY600
Monitor and Report (lb/month)
Limited: See Footnote 6
Monthly
Annually
Calculated
E
Bis (2-ethylhexyl) phthalate (lag/L) 39100
Monitor and Report
Quarterly
Composite
E
Chronic Toxicity6 TGP3B
ArMonitor and Report
Quarterly
Composite
E
Pollutant Scan' NC01
Monitor and Report
Footnote 7
Footnote 7
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 ° 00010
Monitor and Report
Variable'
Grab
U and D
Conductivity (pmhos/cm) 00094
Monitor and Report
Variable
Grab
U and D
Fecal Coliform (#/100ml-) 31616
(geometric mean)
Monitor and Report
Variable
Grab
U and D
FontnntPs-
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. See Special Condition A. (9).
Footnotes continue on the next page.
Page 5 of 18

Permit NC0025453
Footnotes continued from previous page:
2. Sample locations I -Influent, E-Effluent, U-Upstream = at NCSR 1700, D-Downstream = (1) NC HWY 42 and
(2) NCSR 1908. 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 Lower Neuse River Basin Association.
Should participation in the association cease, all instream sampling requirements are immediately reinstated.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent value (85% removal).
4. The 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 valu#. fall below 50 µg/l.
5. For a given wastewater sample, TN = TKN + NO3-N + NO2-N, where TN is Total Nitrogen, TKN is Total
Kjeldahl Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively.
6. Upon receipt of an Authorization to Operate at 6.0 MGD, and lasting through December 31 of the same
calendar year, the TN Load limit shall be 22,832 lb/yr. Thereafter, the TV Load limit shall be 63,9261b/yr.
7. Chronic Toxicity (Ceriodaphnia dubia) P/F at 4.8% with testing in Mar , June, Septemb r, and December.
See Special Condition A. (4.).
8. The permittee shall perform three effluent pollution sca ring the term of this permit. cial
Condition A. (5.).
9. Twice per week sampling must occur on any two non-consecutive days ding the calend week.
10. TN Load is the mass load of TN discharged by the permittee in a period of time. See Special Condition A. (6.).
11. Compliance with these limits shall be determined in accordance with Special Condition A. (7.), Annual Limits
for Total Nitrogen.
12. The permittee shall sample instream hardness upstream of the facility' h.4e. The sample shall be
representative of the hardness in the stream. If the permittee is a member of the Monitoring Coalition
Program, sampling for instream hardness may be waived as long -as the Monitoring Coalition agrees to
sample hardness at the nearest upstream location, at a minimum frequency of quarterly, and the permittee
has obtained approval from DWR -NPDES Permitting.Unit that t� upstream station being monitored by the
coalition is representative of the receiving stream for this dischar e. The permittee is responsible for
submitting instream hardness test results with its DMRs as results are received from the coalition. If coalition
membership is cancelled or the Monitoring Coalition terminates instream hardness sampling at the approved
station, the permittee will immediately notify the Division and resume sampling for instream hardness,
upstream of its discharge, as required in Section A. (1.). Effluent hardness shall be performed in conjunction
with testing for hardness dependent metals (cadmium, copper, lead, nickel, silver, and zinc).
of floating solids or visible foam in other than trace amounts.
Page 6 of 18

Permit NCO025453
A.(3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS 110.0 MGD]
[15A NCAC 02B .0400 et seq.,15A NCACO2B .0500 et seq.] Grade IV
Biological Water Pollution Control System [15A NCAC 08G .0302]
a. Beginning upon receipt of the Engineer's Certification for completion of the expansion to 10.0
MGD and lasting until 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:
PARAMETER
Parameter Code
EFFLUENT LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location2
Flow 50050
10.0 MGD
Continuous
Recording
I or E
Total Monthly Flow (MG) 82220
Monitor and Report
Monthly
Calculated
E
BOD, 5 day, 20°C3 C0310
(April 1- October 31)
5.0 mg/L
7.5 mg/L
2/week
Composite
I and E
BOD, 5 day, 20°C3 C0310
(November 1- March 31)
10.0 mg/L
15.0 mg/L
2/week$
Composite
I and E
Total Suspended Solids3 C0530
30.0 mg/L
45.0 mg
2/week$
Composite
I and E
NH3 as N C0610
(Apr 1- Oct 31)
1.0 mg/L
3.0 mg/L
eeV
C040site
E
NH3 as N C0610
(Nov 1- Mar 31)
2.0 mg/L
6.0 mg/L
S2/week$
Composite
E
Fecal Coliform 31616
(geometric mean)
200/100 mL
400/100 mL
2/week$
Grab
E
Dissolved Oxygen 00300
Daily Average >_ 6.0 mg/L
aily
Grab
E
pH 00400
Between 6.0 and 9.0 Standard Units
Daily
Grab
E
Temperature °C 00010
Moni and Report
Daily
Grab
E
Total Residual Chlorine' 50060
1 r 1 28 lag/L
Daily
Grab
E
Conductivity (pmhos/cm) 00094
Monitor and Report
Daily
Grab
E
Total Phosphorus (mg/L) C0665
2.0 mg/L (Quarterly Average)
Weekly
Composite
E
TKN (mg/L) A 00625
Monitor and Report
Weekly
Composite
E
NO3-N + NO2-N (mg/L 00630
Monitor and Report
Weekly
Composite
E
Total Nitrogen5 (mg/L) C0600
Monitor and Report
Weekly
Calculated
E
TN Load 9,10 QM600
QY600
Monitor and Report (lb/month)
Limited: See Footnote 6
Monthly
Annually
Calculated
E
Bis (2-ethylhexyl) phthalate (lag/L) 39100
Monitor and Report
Quarterly
Composite
E
Chronic Toxicity6 TGP3B
ArMonitor and Report
Quarterly
Composite
E
Pollutant Scan' NC01
Monitor and Report
Footnote 7
Footnote 7
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 ° 00010
Monitor and Report
Variable'
Grab
U and D
Conductivity (pmhos/cm) 00094
Monitor and Report
Variable
Grab
U and D
Fecal Coliform (#/100ml-) 31616
(geometric mean)
Monitor and Report
Variable
Grab
U and D
FontnntPs-
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. See Special Condition A. (9).
Footnotes continue on the next page.
Page 7 of 18

Permit NC0025453
Footnotes continued from previous page:
2. Sample locations I -Influent, E-Effluent, U-Upstream = at NCSR 1700, D-Downstream = (1) NC HWY 42 and
(2) NCSR 1908. 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 Lower Neuse River Basin Association.
Should participation in the association cease, all instream sampling requirements are immediately reinstated.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent value (85% removal).
4. The Division shall consider all effluent total residual chlorine values reported below 50 µg/1 to be in
compliance with the permit. However, the permittee shall continue to record and submit all values reported
by a North Carolina certified laboratory (including field certified), even if these valu* fall below 50 µg/1.
5. For a given wastewater sample, TN = TKN + NO3-N + NOz-N, where TN is Total Nitrogen, TKN is Total
Kjeldahl Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively.
6. Upon receipt of an Authorization to Operate at 10.0 MGD, and lasting through D mber 31 of the same
calendar year, the TN Load limit shall be 63,926 lb/yr. Thereafter, the TN Load h all be 89,842 lb/yr.
7. Chronic Toxicity (Ceriodaphnia dubia) P/F at 7.7% with testing in March, June, Sep r, and December.
See Special Condition A. (4.).
8. The permittee shall perform three effluent pollution sca ring the term of this permit. cial
Condition A. (5.).
9. Twice per week sampling must occur on any two non-consecutive days ding the calend week.
10. TN Load is the mass load of TN discharged by the permittee in a period of time. See Special Condition A. (6.).
11. Compliance with these limits shall be determined in accordance with Special Condition A. (7.), Annual Limits
for Total Nitrogen.
12. The permittee shall sample instream hardness upstream of the facility's dis&#te. The sample shall be
representative of the hardness in the stream. If the permittee is a member of the Monitoring Coalition
Program, sampling for instream hardness may be waived as long as the Monitoring Coalition agrees to
sample hardness at the nearest upstream location, at a minimum frequency of quarterly, and the permittee
has obtained approval from DWR -NPDES Permitting Unit that t� upstream station being monitored by the
coalition is representative of the receiving stream for this dischar e. The permittee is responsible for
submitting instream hardness test results with its DMRs as results are received from the coalition. If coalition
membership is cancelled or the Monitoring Coalition terminates instream hardness sampling at the approved
station, the permittee will immediately notify the Division and resume sampling for instream hardness,
upstream of its discharge, as required in Section A. (1.). Effluent hardness shall be performed in conjunction
with testing for hardness dependent metals (cadmium, copper, lead, nickel, silver, and zinc).
of floating solids or visible foam in other than trace amounts.
Page 8 of 18

Permit NC0025453
A.(4.) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY) [15A NCAC 02B.0200]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dubia at an effluent concentration of 2% at 2.5 MGD, 4.8% at 6.0 MGD and
7.7% at 10.0 MGD flow.
The permit holder shall perform at a minimum, quarterl 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 testingrmust be obtained
during representative effluent discharge and shall be performed at the NPDES permitted final effluent
discharge below all treatment processes. ,r
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 eyarameter
ally using
the Division's eDMR system for the month in which tests were performed, using thcode
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: 14
Attention: North Carolina Division of Water Resources
Water Sciences Section/.
1621 Mail Service Cent
Raleigh, NC 27699-1621
Or, results can be sent to
Completed Aquatic
days after the end o
lot
Eity Test Forms shall be fill
reporting period for which
Toxicology Branch
�* I
the Water Sciences Section no later than 30
report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, andsbe 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 e permittee will complete the information located at the top of the aquatic toxicity (AT) test
form in the facility name, permit number, pipe number, county, and the month/year of the
report with otation of "No Flow" in the comment area of the form. The report shall be submitted
to the Water S s Section at the address cited above
Should the permito monitor during a month in which toxicity monitoring is required,
monitoring will be iruired 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.
Page 9 of 18

Permit NCO025453
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.
A.(5.) 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: 2021, 2022, and 2023. 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)
Trans-1,2-dichloroethylene
Bis (2-chloroethyl) ether
Chlorine (total residual, TRC)
1,1-dichloroethylene
Bis (2-chloroisopropyl) ether
Dissolved oxygen
1,2-dichloropropane
Bis (2-ethylhexyl) phthalate
Nitrate/Nitrite
1,3-dichloropropylene
4-bromophenyl phenyl ether
Kjeldahl nitrogen
Ethylbenzene
Butyl benzyl phthalate
Oil and grease
Methyl bromide
2-chloronaphthalene
Phosphorus
Methyl chloride
4-chlorophenyl phenyl ether
Total dissolved solids
Methylene chloride
Chrysene
Hardness
1,1,2,2-tetrachloroethane
Di-n-butyl phthalate
Antimony
Tetrachloroethylene
Di-n-octyl phthalate
Arsenic
Toluene
Dibenzo(a, h)a nth racene
Beryllium
1,1,1-trichloroethane
1,2-dichlorobenzene
Cadmium
1,1,2-trichloroethane
1,3-dichlorobenzene
Chromium
Trichloroethylene
1,4-dichlorobenzene
Copper
Vinyl chloride
3,3-dichlorobenzidine
Lead
Acid -extractable compounds:
Diethyl phthalate
Mercury (EPA Method 1631E)
P-chloro-m-cresol
Dimethyl phthalate
Nickel
2-chlorophenol
2,4-dinitrotoluene
Selenium
2,4-dichlorophenol
2,6-dinitrotoluene
Silver
2,4-di methyl phenol
1,2-diphenylhydrazine
Thallium
4,6-dinitro-o-cresol
Fluoranthene
Zinc
2,4-dinitrophenol
Fluorene
Cyanide
2-nitrophenol
Hexachlorobenzene
Total phenolic compounds
4-nitrophenol
Hexachlorobutadiene
Volatile organic compounds:
Pentachlorophenol
Hexachlorocyclo-pentadiene
Acrolein
Phenol
Hexachloroethane
Acrylonitrile
2,4,6-trichlorophenol
Indeno(1,2,3-cd)pyrene
Benzene
Base -neutral compounds:
Isophorone
Bromoform
Acenaphthene
Naphthalene
Carbon tetrachloride
Acenaphthylene
Nitrobenzene
Chlorobenzene
Anthracene
N-nitrosodi-n-propylamine
Chlorodibromomethane
Benzidine
N-nitrosodimethylamine
Chloroethane
Benzo(a)anthracene
N-nitrosodiphenylamine
2-chloroethylvinylether
Benzo(a)pyrene
Phenanthrene
Chloroform
3,4 benzofluoranthene
Pyrene
Page 10 of 18

Permit NC0025453
Dichlorobromomethane Benzo(ghi)perylene 1,2,4-trichlorobenzene
1,1-dichloroethane Benzo(k)fluoranthene
1,2-dichloroethane Bis (2-chloroethoxy) methane
Reporting. Test results shall be reported electronically via eDMR or on DWR Form - DMR-PPA-1 (or
on a form approved by the Director) by December 31st 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 R?eC
ease note that
Municipal facilities that are subject to the Effluent Pollutant Scan reqlisted above are also
subject to additional toxicity testing requirements specified in Federagulation 40 CFR 122.210)(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 nnually in
the four and one half year period prior to the application. These tests shall be performe r acute or
chronic toxicity, whichever is specified in this permit. The multiple species toxicity te.4fesults 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 Bran at-743-8401 for guidance on conducting the
additional toxicity tests aneporting requirements. Results sV5uld 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. ,
4% Vft
A.(6.) CALCULATION OFT LOADS [G.S. 143-215.1(b)]
a. The permittee shalll lcula;,NITROGEN
thl and annual TN Loads as follows:
Monthly TN L�(lb/moN x TMF x 8.34
where:
TN =Jphe average Total Nitrogen concentration (mg/L) of the
composite samples collected during the month
the Total Monthly Flow of wastewater discharged during the
month (MG/mo)
conversion factor, from (mg/L x MG) to pounds
ii. Annual TN Load (lb/yr) = Sum of the 12 Monthly TN Loads for the calendar year
b. The permittee shall report monthly Total Nitrogen results (mg/L and lb/mo) in the discharge
monitoring report for that month and shall report each year's annual results (lb/yr) in the
December report for that year.
Page 11 of 18

Permit NC0025453
A.(7.) ANNUAL LIMITS FOR TOTAL NITROGEN [G.S.143-215.1(b)]
a. Total Nitrogen (TN) allocations and TN Load limits for NPDES dischargers in the Neuse River
basin apply on a calendar year basis.
b. For any given calendar year, the permittee shall be in compliance with the annual TN Load limit
in this Permit if:
i. the permittee's annual TN discharge is less than or equal to its TN Load limit, or
ii. the permittee is a co-permittee member of a compliance association.
C. If the permittee is not a co-permittee member of a compliance association and the permittee's
cumulative annual TN discharge exceeds the effective TN Load limit in this permit at any point
during the calendar year, the permittee is in violation of its TN Loa's limit, and each day of a
continuing violation shall constitute a separate violation.
d. The TN Load limit in this Permit (if any) may be modified�<e resu llowable changes in
the permittee's TN allocation. 146,
i. Allowable changes include those resulting from purch)§e of TN alloca n from the
Wetlands Restoration Fund; purchase, sale, trade, or lea of allocation between the
permittee and other dischargers; regionaliLOation; and oth ansactions aped by the
Division.
ii. The permittee may request a modification of the TN Load limit in this Permit to reflect
allowable changes in its TN allocation. Upon receipt of timely and proper application, the
Division will modify the permi ropriate and in accordanc with state and federal
program requirements.
iii. Changes in TN limits become effe ve anuary 1 of the ye r following permit
modification. The Division must re 've application no later than August 31 for changes
proposed for the following calendar ear.
iv. Application shall be sent to:
NCI5WR / NPDES Programs
Attn: Neuse River Basin Coordinator
1617 Mail Service Center
Raleigh, NC 27699-1617
e. If the permittee is a member nd co-permittee of an approved compliance association, its TN
discharge during that year erred by that association's group NPDES permit and the TN
limits therein. k K
i. The permittee shall be co dered a Co-permittee Member for any given calendar year in
hich it is identified as such in Appendix A of the association's group NPDES permit.
ii.Nnotifie
roster(s) and members' TN allocations will be updated annually and in
with state and federal program requirements.
iii.At intends to join or leave a compliance association, the Division must be
thiproposed action in accordance with the procedures defined in the
association's NPDES permit.
(A) Upon receipt of timely and proper notification, the Division will modify the permit as
appropriate and in accordance with state and federal program requirements.
(B) Membership changes in a compliance association become effective on January 1 of the
year following modification of the association's permit.
The TN monitoring and reporting requirements in this Permit remain in effect until expiration of
this Permit and are not affected by the permittee's membership in a compliance association.
Page 12 of 18

Permit NCO025453
A.(8.) TOTAL NITROGEN ALLOCATIONS AND OFFSET CREDITS [G.S. 143-215.1(b)]
a. The following table lists the Total Nitrogen (TN) allocations and offset credits assigned to,
acquired by, or transferred to or from the permittee in accordance with the Neuse River nutrient
strategy (15A NCAC 02B .0700) and the status of each as of permit issuance. These allocations and
credits are not enforceable limits nor do they supersede any TN limit(s) established elsewhere in
this permit or in the NPDES permit of a compliance association of which the permittee is a Co-
Permittee Member.
Table 1. Allocations and Offset Credits - 2.5 MGD
ALLOCATION/ CREDITS
ALLOCATION/
SOURCE
DATE
AMOUNT (Ib/yr)1
STATUS
CREDITS TYPE
Estuary
Discharge
Base Allocation
Assigned by Rule z
12/7/97; 4/1/03
10,700
21,400
Active
Supplemental
Purchased from South Granville
7/5/06
3,668
7,336
Reserve
Allocation
WSA (NC0026824)
1,645
3,290
Mixed
Supplemental
Purchased from UNIFI-Kinston
8/30/2007
716
1,432
Active
Allocation
(NC0003760)
929
1,858
Reserve
Purchased from
TN Offset Credits
RS-Flat Swamp, LLC (Flat Swamp
9/4/2020
15,908 3,4
31,816 4
Reserve
Mitigation Bank)
Supplemental
Purchased from International
9/30/2020
13,000
26,000
Reserve
Allocation
Paper, NC0003191
TOTAL
44,921
89,842
Mixed
11,416
22,832
Active
33,505
67,010
Reserve
See footnotes below.
Page 13 of 18

Permit NCO025453
Table 2. Allocations and Offset Credits - 6.0 MGD
ALLOCATION/ CREDITS
ALLOCATION/
SOURCE
DATE
AMOUNT (Ib/yr)l
STATUS
CREDITS TYPE
Estuary
Discharge
Base Allocation
Assigned by Rule 2
12/7/97; 4/1/03
10,700
21,400
Active
Supplemental
Purchased from South Granville
7/5/06
3,668
7,336
Reserve
Allocation
WSA (NC0026824)
Supplemental
Purchased from UNIFI-Kinston
8/30/2007
1,645
3,290
Active
Allocation
(NC0003760)
Purchased from
TN Offset Credits
RS-Flat Swamp, LLC (Flat Swamp
9/4/2020
15,908 3.4
31,8164
Reserve
Mitigation Bank)
Supplemental
Purchased from International
9/30/2020
13,000
26,000
Mixed
Active
Allocation
Paper, NC0003191
Reserve
TOTAL
44,921
89,842
Mixed
31,963
63,926
Active
12,958
25,916
Reserve
See footnotes below.
Table 3. Allocations and Offset Credits -10.0 MGD
ALLOCATION/ CREDITS
ALLOCATION/
SOURCE
DATE
AMOUNT (Ib/yr)l
STATUS
CREDITS TYPE
Estuary
Discharge
Base Allocation
Assigned by Rule 2
12/7/97; 4/1/03
10,700
21,400
Active
Supplemental
Purchased from South Granville
7/5/06
3,668
7,336
Active
Allocation
WSA (NC0026824)
Supplemental
Purchased from UNIFI-Kinston
8/30/2007
1,645
3,290
Active
Allocation
(NC0003760)
Purchased from
TN Offset Credits
RS-Flat Swamp, LLC (Flat Swamp
9/4/2020
15'908 3-4
31,8164
Active
Mitigation Bank)
Supplemental
Purchased from International
9/30/2020
13,000
26,000
Active
Allocation
Paper, NC0003191
TOTAL
44,921
89,842
Active
Footnotes:
1. Transport Factor = 50%. Values are displayed to the nearest pound per year.
2. 15A NCAC 02B .0713 (formerly 02B .0234)
3. The Permittee purchased offset credits in the amount of 715,858.18 lb TN, or 23,861.941b/yr for 30 years.
To satisfy the 1.5:1 uncertainty ratio (Rule .0713), 15,907.961b/yr of credits are available to the Permittee,
and the remaining 7,953.98 lb/yr are set aside for the benefit of the estuary and are not available to offset
any activity, whether point source or nonpoint source in nature.
4. The Mitigation Bank is located in the 100% transport zone per the 1999 Neuse Estuary TMDL. In
accordance with S.L. 2020-18, the 15,907.96 lb/yr of available credits acquired by the Permittee are, for the
purposes of this permit, equivalent to 31,815.921b/yr for 30 years at the Permittee's discharge location.
Page 14 of 18

Permit NC0025453
b. Any addition, deletion, or modification of the listed allocations and credits (other than
typographical errors) or any change to Active status of any of the listed allocations and credits
shall be considered a major modification of this permit and shall be subject to the public review
process afforded such modifications under state and federal rules.
A.(9.) ELECTRONIC REPORTING OF MONITORING REPORTS [G.S. 143-215.1(b)]
Federal regulations require electronic submittal of all discharge monitoring re orts (DMRs) and
program reports. The final NPDES Electronic Reporting Rule was adopted ecame effective on
December 21, 2015.
NOTE: This special condition supplements or supersedes the
permit (Standard Conditions for NPDES Permits):
1.
Section B. (11.)
Section D. (2.)
Section D. (6.)
Section E. (5.)
Signatory Requirements
Reporting
Records Retention
Monitoring Reports
within Part I1 of this
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 electronically using eDMR. The eDMR system allows permitted facilities to enter
monitoring data and submit DMRs electronically using the internet. Until such time that the state's
eDMR application is compliant with EPA's Cross -Media Electronic Reporting Regulation
(CROMERR), permittees will be required to submit all discharge monitoring data to the state
electronically using eDMR and will be require o complete the eDMR submission by printing,
signing, and submitting one signed original an y of the computer printed eDMR to the
following address:
NC DEQ / Division of WatA Resources / Water Quality Permitting Section
ATTENTIOCentral Files
1617 Mail AF14ce Center
Raleigh, North Carolina 27699-1617
cable to use the eDMR system due to a demonstrated hardship or due to the
,ically located in an area where less than 10 percent of the households have
then a temporary waiver from the NPDES electronic reporting requirements
AWcharge monitoring data may be submitted on paper DMR forms (MR 1,1.1,
2, 3) or alternative f ms approved by the Director. Duplicate signed copies shall be submitted to
the mailing address above. 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, 2020, the permittee must electronically report the following compliance
monitoring data and reports, when applicable:
Page 15 of 18

Permit NC0025453
Sewer Overflow/Bypass Event Reports;
Pretreatment Program Annual Reports; and
Clean Water Act (CWA) Section 316(b) Annual Reports.
NPDES Electronic Reporting Rule - Phase 2 Extension. EPA is proposing to extend the Phase 2
deadline from December 21, 2020, to December 21, 2025. The current compliance date will be
extended if the implementation date is extended as a final regulation change in the federal register.
The permittee may seek an electronic reporting waiver from the Division ee "How to Request a
Waiver from Electronic Reporting' section below).
2. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9), the permittee must identify the initial recipient at the time
of each electronic submission. The permittee should use the EPA's websit esources to identify the
initial recipient for the electronic submission.
Initial recipient of electronic NPDES information from E egulated faci es means the entity
(EPA or the state authorized by EPA to implement t PDES p ogram) that is the designated
entity for receiving electronic NPDES data [see 4 7.2(b)].
EPA plans to establish a website that will also link to pprop fate ectronic reporting tool for
each type of electronic submission and for each state. Instructions on how to access and use the
appropriate electronic reporting tool w1 be available as well. I rmation on EPA's NPDES
Electronic Reporting Rule is found at:
https://www.federalregister.ov/documents/2015/10/22/2015- national-pollutant-
discharge-elimination-system-npdes-electronic-reporting rule
Electronic submissions must start by the dates listed in the "Reporting Requirements" section
above. OF3. How to Request a WaiveTo m Electronic Re orating
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 electro*eporting 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 yehrs 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
reporti waivers are not transferrable. Only permittees with an approved reporting waiver
reque submit monitoring data and reports on paper to the Division for the period that the
approve rting waiver request is effective.
Information and the application for a temporary electronic reporting waiver are found on
the following age:
http://deq.nc.gov/about/divisions/water-resources/edmr
4. Sianatory Reauirements [Suvvlements Section B. (11.1 (bl and Suversedes Section B. (11.) (d)l
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part
II, Section B. (11.) (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.
Page 16 of 18

Permit NC0025453
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 122.221. NO OTHER STATEMENTS OF CERTIFICATION WILL
BE ACCEPTED:
"I certify, under penalty of law, that this document and all attachments were prepaitd 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 perkvs.
age the system, or
those persons directly responsible for gathering the information, the informatis, to the best of my
knowledge and belief, true, accurate, and complete. I am aware that there are sities for submitting
false information, including the possibility of fines and imprislnment for kno"
A4
5. Records Retention [Supplements Section D. (6)1�
The permittee shall retain records of all Discharge Monitoring Reports, including R
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
177 A l
J
Page 17 of 18

Permit NCO025453
r
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Terre of CKayan
W
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[Ira F ar Each: N"w Rhly Pr- i SW Cr{ 1
Rpm Locd FlMud ow: J 9 41) 3•Ea4n:
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Page 18 of 18