NC0025453_Draft Permit_20201110 (2)

ROY COOPER
Governor '
MICHAEL S.REGAN
Secretary .4406'" 0*
S.DANIEL SMITH NORTH CAROLINA
Director Environmental Quality
November 10, 2020
Mr.J D Solomon,Town Manager
Town of Clayton
111 East Second Street
Clayton,North Carolina 27528
Subject: Draft NPDES Permit Modification
Permit NC0025453
Little Creek WRF
Johnston County
Grade IV Biological WPCS
SIC Code 4952
Dear Mr. Solomon:
Enclosed with this letter is a copy of the Draft NPDES permit modification for your facility.Please
review this draft carefully to ensure thorough understanding of the requirements and conditions it
contains. There are 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 122.21(j)(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 fmal regulation change in the federal register[See A.(9.)].
The NPDES standard conditions(Parts II,III,and IV)that are a part of the permit are not included
in this draft document (cover, map, and Part I). The conditions are the same as in your current
permit except that agency and division names have been updated.The latest version is available at
https://bit.ly/3k5NFaL and can be viewed online or downloaded as a PDF file.
Concurrent with this notification the Division is publishing a notice in a newspaper having
circulation in the general Franklin 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.
DE
N Comt of m Quality I Division of Water Resources
512 North orthar
SalisburylinaDepart Street
en 11MEnvironi Mail Service
ental Center Raleigh.North Carolina 27699 1617
Pgialigamot r ,/./ 919.707 9000

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 contact me at(919) 707-3609 or by email at [e-mail].
Sincerely,
Nick Coco,Engineer
NPDES Municipal Permitting Unit
Hardcopy: NPDES Files
Ecopy: US EPA Region 4
DWR/Raleigh Regional Office/Water Quality/Scott Vinson
DWR/Operator Certification Program/Maureen Kinney
DWR/Aquatic Toxicology Branch/Cindy Moore
DWR/Ecosystems Branch/Mark Vander Borgh
DWR/Public Water Supply/Raleigh Regional Office/Shawn Guyer
Page 2 of 2

Permit NC0025453
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions of North Carolina General Statute 143-215.1,other lawful standards
and regulations promulgated and adopted by the North Carolina Environmental Management
Commission,and the Federal Water Pollution Control Act,as amended,the
Town of Clayton
is hereby authorized to discharge wastewater from a facility located at the
Little Creek Water Reclamation Facility
1000 Durham Street Extension
Clayton
Johnston County
to receiving waters designated as the Neuse River in the Neuse 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 authorization to discharge shall expire at midnight on March 31,2024.
Signed this day Month xx,2020.
DRAFT
S.Daniel Smith, Director
Division of Water Resources
By Authority of the Environmental Management Commission

Permit NC0025453
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 • tment facility consisting of
the following components:
• mechanical screening and grit removal system,
• 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 chlorination/dechlorination,
• 90,000 gallon aerated digester/sludge stabilization tank,
• 360,000 gallon sludge holding tank, `itfor
• sludge loading station,
• sludge thickening building with rotary drum thickener
• non-potable water system using reclaimed treated wastewater
• reclaimed water pump station
This facility is located at the Little Creek Water Reclamation Facility, Durham Street Extension,
Clayton,Johnston County,and
2. After receiving an Authorization?:Construct from the Division and submitting an engineer's
certification,construct and operate a 6.0 MGD wastewater treatment facility.
3. After receiving an Authorization to Construct from the Division and submitting an engineer's
certification,construct and operate a 10.0 MGD wastewater treatment facility.
4. Discharge from said 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 NC0025453
PART I
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:
EFFLUENT LIMITS MONITORING REQUIREMENTS
PARAMETER
Parameter Code Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location2
Flow 50050 2.5 MGD Continuous Recording I or E
Total Monthly Flow(MG) 82220 Monitor and Report Monthly Calculated E
BOD, 5 day,20°C3 C0310 5.0 mg/L 7.5 mg/L 2/weeks Composite I and E
(April 1-October 31)
BOD, 5 day,20°C3 C0310 10.0 mg/L 15.0 mg/L 2/week8 Composite I and E
(November 1-Mardi 31)
Total Suspended Solids3 C0530 30.0 mg/L 45.0 mg/L 2/weeks Composite I and E
NH3 as N C0610 1.0 mg/L 3.0 mg/L 2/week8 Composite E
(Apr 1-Oct 31)
NH3 as N C0610 2.0 mg/L 6.0 mg/L 2/week8 Composite E
(Nov 1-Mar 31)
Fecal Coliform 31616 200/100 mL 400/100 mL 2/week8 Grab E
(geometric mean)
Dissolved Oxygen 00300 Daily Average>_ 6.0 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 Chlorine4 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) 00625 Monitor and Report Weekly Composite E
NO3-N +NO2-N (mg/L) 00630 Monitor and Report Weekly Composite E
Total Nitrogens (mg/L) C0600 Monitor and Report Weekly Calculated E
TN Load 9,1° QM600 Monitor and Report(lb/month) Monthly Calculated E
QY600 22,832 lb/yr Annually
Bis(2-ethylhexyl)phthalate(pg/L)39100 Monitor and Report Quarterly Composite E
Chronic Toxicitys 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 (mg/L) 00300 Monitor and Report Variable2 Grab U and D
Temperature°C 00010 Monitor and Report Variable2 Grab U and D
Conductivity(pmhos/cm) 00094 Monitor and Report Variable2 Grab U and D
Fecal Coliform(#/100mL) 31616 Monitor and Report Variable2 Grab U and D
(geometric mean)
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.
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/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 values 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,September,and December.See
Special Condition A.(4.).
7. The permittee shall perform three effluent pollution scans d the term of this permit.See Special
Condition A.(5.).
8. Twice per week sampling must occur on any two non-co utive days during the calendar week.
9. TN Load is the mass load of TN discharged by the peitteen a period of time.See Special Condition 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 fa?Wty's discharge.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 the upstream station being monitored by the
coalition is representative of the receiving strearh for this discharge.The permittee is responsible for
submitting instream hardne t results with its DMRs as resultresultlare received from the coalition.If coalition
membership is cancelled 'toring Coalition terminates rtstream hardness sampling at the approved
station,the permittee will imme ately 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).
b. There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 4 of 18

Permit NC0025453
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 monitored1 by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
PARAMETER
Parameter Code Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type 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 5.0 mg/L 7.5 mg/L 2/weeks Composite I and E
(April 1-October 31)
BOD, 5 day,20°C3 C0310 10.0 mg/L 15.0 mg/L 2/weeks Composite I and E
(November 1-March 31)
Total Suspended Solids3 C0530 30.0 mg/L 45.0 mg/L 2/week8 Composite I and E
NH3 as N C0610 1.0 mg/L 3.0 mg/L 2/week8 Composite E
(Apr 1-Oct 31)
NH3 as N C0610 2.0 mg/L 6.0 mg/L 2/week8 Composite E
(Nov 1-Mar 31)
Fecal Coliform 31616 200/100 mL 400/100 mL 2/weeks Grab E
(geometric mean)
Dissolved Oxygen 00300 Daily Average>_ 6.0 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 Chlorine4 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) 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 9,1° QM600 Monitor and Report(lb/month) Monthly
QY600 Limited: See Footnote 6 Annually Calculated E
Bis(2-ethylhexyl)phthalate(pg/L)39100 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 (mg/L) 00300 Monitor and Report Variable2 Grab U and D
Temperature°C 00010 Monitor and Report Variable2 Grab U and D
Conductivity(pmhos/cm) 00094 Monitor and Report Variable2 Grab U and D
Fecal Coliform(#/100mL) 31616 Monitor and Report Variable2 Grab U and D
(geometric mean)
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.
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/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 values fall below 50
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 TN Load limit shall be 63,926 lb/yr.
7. Chronic Toxicity(Ceriodaphnia dubia)P/F at 4.8%with tes u , 'in Mar 4h,June,September,and December.
See Special Condition A.(4.).
8. The permittee shall perform three effluent pollution scans during the term of this permit.See Special
Condition A.(5.).
9. Twice per week sampling must occur on any two non-consecutive days during the calendar 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 discharge.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 the upstream station being monitored by the
coalition is representativ#of the receiving stream for this discharge.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).
b. There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 6 of 18

Permit NC0025453
A.(3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [10.0 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 monitored1 by the Permittee as
specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
PARAMETER —
Parameter Code Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location2
Flow 50050 10.0 MGD Continuous Recording I or E
Total Monthly Flow(MG) 82220 Monitor and Report Monthly Calculated E
BOD, 5day,20°C3 C0310
1 (April 1-October 31) 5.0 mg/L 7.5 mg/L 2/week8 Composite I and E
BOD, 5 day,20°C3 C0310 10.0 mg/L 15.0 mg/L 2/week8 Composite I and E
(November 1-March 31)
Total Suspended Solids3 C0530 30.0 mg/L 45.0 mg/1 2/week8 Composite I and E
NH3 as N CO610 1.0 mg/L 3.0 mg/L 2/week8 Composite E
(Apr 1-Oct 31) _
NH3 as N C0610 2.0 mg/L 6.0 mg/L 2/week8 Composite E
(Nov 1-Mar 31)
Fecal Colifo 31616 200/100 mL 400/100 mL 2/week8 Grab E
(geometric mean)
Dissolved Oxygen 00300 Daily Average>_ 6.0 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 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) 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 Monitor and Report(lb/month) Monthly
QY600 Limited: See Footnote 6 Annually Calculated E
Bis(2-ethyihexyl)phthalate(MMg/L)39100 Monitor and Report Quarterly Composite E
Chronic Toxicity6 TGP3B Monitor and Report Quarterly _ Composite E
Pollutant Scan7 NC01 Monitor and Report Footnote 7 Footnote 7 E
Hardness"-Total as CaCO3(mg/L)00900 Monitor and Report Quarterly Composite E
Hardness11_-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(pmhos/cm) 00094 Monitor and Report Variable2 Grab U and D
Fecal Coliform (#/100mL) 31616 Monitor and Report Variable2 Grab U and D
(geometric mean)
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.
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 bel w 50 µg/1 to be in
compliance with the permit. However,the permittee shall continue to record bmit all values reported
by a North Carolina certified laboratory(including field certified),even if th valu fall below 50 µg/1.
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 10.0 MGD,and lasting through December 31 of the same
calendar year,the TN Load limit shall be 63,926 lb/yr.Thereafter,the TN Load limit shall be 89,842 lb/yr.
7. Chronic Toxicity(Ceriodaphnia dubia)P/F at 7.7%with testing in March,June,September,and December.
See Special Condition A.(4.).
8. The permittee shall perform three effluent pollution scans during the term of this permit.See Special
Condition A.(5.).
9. Twice per week sampling must occur on any two non-consecutive days during the calendar 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 discharge.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 the upstream station being monitored by the
coalition is representativ .of the receiving stream for this discharge.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 permi fee will immediately notify the Division and resume sampling for instream hardness,
upstream of its discharge,as rec ved in Section A.(1.). Effluent hardness shall be performed in conjunction
with testing for hardness dependent metals(cadmium,copper,lead,nickel,silver,and zinc).
b. There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 8 of 18
I

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, quarterly monitoring using test procedures outlined in
the"North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised December 2010,or
subsequent versions or"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"
(Revised-December 2010)or subsequent versions.The tests will be performed during the months of
March,June,September,and December. These months signify the first month of each three-month
toxicity testing quarter assigned to the facility. Effluent sampling for this testing must be obtained
during representative effluent discharge and shall be performed at th PDES permitted final effluent
discharge below all treatment processes.
If the test procedure performed as the first test of any single er results in a failure or ChV
below the permit limit,then multiple-concentration testin I performed at a minimum,in
each of the two following months as described in"North oh a Phase II Chronic Whole Effluent
Toxicity Test Procedure"(Revised-December 2010)or subsequent4iersions.
All toxicity testing results required as part of this permit condition will entered ele nically using
the Division's eDMR system for the month in which tests were performat,using the arameter code
TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally,DWR Form AT-3
(original)is to be sent to the following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh,NC 27699-1621
Or,results can be sent to em [e-mail].
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30
days after the end dt`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 disinction of the waste stream.
Should there be no discharge of flow .J m 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 Scies 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.
Page 9 of 18

Permit NC0025453
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)anthracene
Beryllium 1,1,1-tnchloroethane 1,2-dichlorobenzene
Cadmium 1,1,2-tnchloroethane 1,3-dichlorobenzene
Chromium Trichloroethylene 1,4-dichlorobenzene
Copper Vinyl chloride 3,3-dichlorobenzidine
Lead ,odd-extractable compounds: Diethyl phthalate
Mercury(EPA Method 1631E) P-chloro-m-cresol Dimethyl phthalate
Nickel 2-chlorophenol 2,4-dinitrotoluene
Selenium 2,4-dichlorophenol 2,6-dinitrotoluene
Silver 2,4-dimethylphenol 1,2-diphenylhydrazine
Thallium 4,6-dinitro-o-cresol Fluoranthene
Zinc 2,4-dinitrophenol Fluorene
Cyanide 2-nitrophenol Hexachlorobenzene
Total phenolic compounds 4-nitrophenol Hexachlorobutadiene
Volatile organicGomvounds: Pentachlorophenol Hexachlorocyclo-pentadiene
Acrolein Phenol Hexachloroethane
Acrylonitrile 2,4,6-tnchlorophenol Indeno(1,2,3-cd)pyrene
Benzene Base-neutral compounds: Isophorone
Bromoform Acenaphthene Naphthalene
Carbon tetrachloride Acenaphthylene Nitrobenzene
Chlorobenzene Anthracene N-nitrosodi-n-propylamine
Chlorodibromomethane Benzidine N-nitrosodimethylamine
Chloroethane Benzo(a)anthracene N-nitrosodiphenylamine
2-chloroethylvinyl ether Benzo(a)pyrene Phenanthrene
Chloroform 3,4 benzofluoranthene Pyrene
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 Renewal. Please note that
Municipal facilities that are subject to the Effluent Pollutant Scan requirements listed above are also
subject to additional toxicity testing requirements specified in Federal Regulation 40 CFR 122.21(j)(5).
The US EPA requires four(4)toxicity tests for a test organism other than the test species currently
required in this permit. The multiple species tests should be conducted either quarterly for a 12-month
period prior to submittal of the permit renewal application,or four tests performed at leasttnnually in
the four and one half year period prior to the application. These tes r .,shall be performed for acute or
chronic toxicity,whichever is specified in this permie multiple 'es toxicity ter results shall be
filed with the Aquatic Toxicology Branch at the following address:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh,North Carolina 27699-1621
Contact the Division's Aquatic Toxicology Branch at 919-743-8401 for guidance on conducting the
additional toxicity tests and reporting requirements. Results should also be summarized in Part E
(Toxicity Testing Data) of EPA Municipal Application Form 2A,when submitting the permit renewal
application to the N . Permitting Unit.
A.(6.) CA . I ,; . .e OF TOTAL NITROGEN LOADS[G.S.143-215.1(b)]
a. rmittee •lculate monthly and annual TN Loads as follows:
Monthly TN ► (lb/mo)=TN x TMF x 8.34
where: 6
TN = e average Total Nitrogen concentration(mg/L)of the
composite samples collected during the month
MF -, ' the Total Monthly Flow of wastewater discharged during the
month(MG/mo)
8.34 = conversion factor,from (mg/L x MG)to pounds
ii. Annual TN Load(lb/yr)=Sum of the 12 Monthly TN Loads for the calendar year
b. The permittee shall report monthly Total Nitrogen results (mg/L and 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 limi in this permit at any point
during the calendar year,the permittee is in violation of its TN Lo imit,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.
i. Allowable changes include those resulting fro is rc e of TN alloca. rom the
Wetlands Restoration Fund;purchase,sale, . e,or lease of allocation .- - e
permittee and other dischargers;regionalization;and other transactions al)? ed 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 receiptef timely and proper application,the
Division will modify the permif as appropriate and in accordance with state and federal
program requirements. *�
iii. Changes in TN limits become effective on January 1 of the year following permit
modification.The Division must receive application no later than August 31 for changes
proposed for the following calendar'year.
iv. Application shall be sent to:
NCDWR/ NPDES Programs
Attn: Neuse River Basin Coordinator
1617 Mail Service Center
Raleigh,NC 27699-1617
e. If the permittee is a member and co-permittee of an approved compliance association,its TN
discharge during that year is governed by that association's group NPDES permit and the TN
limits therein.
i. The permittee shall be cooidered a Co-permittee Member for any given calendar year in
which it is identified as such in Appendix A of the association's group NPDES permit.
ii. Association roster(s) and members'TN allocations will be updated annually and in
accordance with state and federal program requirements.
iii. If the permittee intends to join or leave a compliance association,the Division must be
notified,ofthe proposed action in accordance with the procedures defined in the
associati }1s NPDES permit.
(A) Upon receipt of timely and proper notification,the Division will modify the permit as
appropriate and in accordance with state and federal program requirements.
(B) Membership changes in a compliance association become effective on January 1 of the
year following modification of the association's permit.
f. The TN monitoring and reporting requirements in this Permit remain in effect until expiration of
this Permit and are not affected by the permittee's membership in a compliance association.
Page 12 of 18

Permit NC0025453
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 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 1,645 3,290 Mixed
Allocation (NC0003760) 8/30/2007 716 1,432 Active
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 NC0025453
Table 2. Allocations and Offset Credits-6.0 MGD
ALLOCATION/ CREDITS
ALLOCATION/ 1
SOURCE DATE AMOUNT(Ib/yr) 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 31,816 4 Reserve
Mitigation Bank)
Supplemental Purchased from International Mixed
Allocation Paper,NC0003191 9/30/2020 13,000 26,000 Active
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/ 1
SOURCE DATE AMOUNT(Ib/yr) 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
Allocation WSA(NC0026824) 7/5/06 3,668 7,336 Active
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 31,816 4 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 23,861.94 lb/yr for 30 years.
To satisfy the 1.5:1 uncertainty ratio(Rule.0713),15,907.96 lb/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 31,815.92 lb/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 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 follows► e tions 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. Re•ortin Re•uirements Su•ersedes Section D. 2. • • on E. 5. a
The permittee shall report discharge monitoring data elec• - y using the NC DWR's Electronic
Discharge Monitoring Report(eDMR) iinternet application.
Monitoring results obtained during the previous month(s)shall .- marized for each month and
submitted electronically using eDMR. The eDMR system allows . a itted 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 required to complete the eDMR submission by printing,
signing,and submitting one signed original and a copy of the computer printed eDMR to the
following addres:
NC DEQ/ Division of Water Resources/ Water Quality Permitting Section
A FI ENTION: Central Files
1617 Mail Service Ce ter
,North Cara 27699-1617
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 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 "How to Request a
Waiver from Electronic Reporting"section below).
2. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9),the permittee must identify the initial recipient at the time
of each electronic submission. The permittee should use the EPA's website resources to identify the
initial recipient for the electronic submission.
Initial recipient of electronic NPDES information from DE- egulated facilities means the entity
(EPA or the state authorized by EPA to implement PDES program)that is the designated
entity for receiving electronic NPDES data[see 40 ' 7.2(b)].
EPA plans to establish a website that will also link to ', iate electronic reporting tool for
each type of electronic submission and for each state. Ins a •ns on how to access and use the
appropriate electronic reporting tool w' 1 be available as we . •rmation on EPA's NPDES
Electronic Reporting Rule is found at: 410
https://www.federalregister.gov/docu en 10/22/2015-- 954/national-pollutant-
discharge-elimination-system-npdes-electronic-r g-ru le
Electronic submissions must start by the dates listed in the"Reporting Requirements"section
above.
3. How to Request a Waiver from Electronic Reporting
The permittee may seek a temporary electronic reporting waiver from the Division. To obtain an
electronic reporting waiver,a permittee must first submit an electronic reporting waiver request to
the Division. Requests for temporary electronic reporting waivers must be submitted in writing to
the Division for written approval at least sixty (60)days prior to the date the facility would be
required under this permit to begin submitting monitoring data and reports. The duration of a
temporary waiver' iall not exceed 5 yirs and shall thereupon expire. At such time,monitoring
data and reports shall be submitted electronically to the Division unless the permittee re-applies for
and is granted a new temporary electronic reporting waiver by the Division. Approved electronic
reporting waivers are not transferrable. Only permittees with an approved reporting waiver
request may submit monitoring data and reports on paper to the Division for the period that the
approved reporting waiver request is effective.
Information on eDMR and the application for a temporary electronic reporting waiver are found on
the following web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
4. Signatory Requirements [Supplements Section B.(11.) (b)and Supersedes Section B. (11.) (d)1
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part
II,Section B. (11.)(a)or by a duly authorized representative of that person as described in Part II,
Section B. (11.)(b). A person,and not a position,must be delegated signatory authority for eDMR
reporting purposes.
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 122.22]. 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 of fines and imprisonment for knowing violations."
5. Records Retention[Supplements Section D.(6.)1
The permittee shall retain records of all Discharge Monitoring Reports,including )MR
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 17 of 18

Permit NC0025453
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Page 18 of 18